JP6076271B2

JP6076271B2 - Caisson press-fitting device and caisson press-fitting method

Info

Publication number: JP6076271B2
Application number: JP2014020606A
Authority: JP
Inventors: 仁志内藤; 泰邦吉岡; 宏之今塩; 辰雄鈴木
Original assignee: JFE Civil Engineering and Construction Corp
Current assignee: JFE Civil Engineering and Construction Corp
Priority date: 2013-05-14
Filing date: 2014-02-05
Publication date: 2017-02-08
Anticipated expiration: 2034-02-05
Also published as: JP2014240592A

Description

本発明はケーソン圧入装置およびケーソン圧入工法、特に、順次継ぎ足しながら形成されるコンクリート製ケーソンを、地盤に圧入するためのケーソン圧入装置およびケーソン圧入工法に関する。 TECHNICAL FIELD The present invention relates to a caisson press-fitting device and a caisson press-fitting method, and more particularly to a caisson press-fitting device and a caisson press-fitting method for press-fitting a concrete caisson formed while sequentially adding to a ground.

従来から、地盤に縦穴を形成する工法として、筒状のケーソンの上部に、圧入桁を乗せ、圧入桁をジャッキで下降させることによってケーソンを地盤に圧入するケーソン圧入工法が知られている。すなわち、ケーソンが、ジャッキの１ブロック（１ステップに同じ）分だけ圧入されたところで、クレーンで圧入桁を持ち上げ、圧入されたケーソンの上部に、１ブロック分の高さのケーソンを継ぎ足し、再度、クレーンで圧入桁を継ぎ足されたケーソンの上部に乗せて、圧入桁をジャッキで下降させ、以後、上記作業を繰り返している。
このとき、圧入桁の持ち上げやケーソンの継ぎ足しに、外部のクレーンを用いることから、作業能率が低く、又、強風時にはクレーンが風で煽られ、作業を中断または中止しなければならないという問題があった。そこで、圧入桁を昇降可能に支持する圧入桁昇降装置を設けたケーソン圧入装置が開示されている（例えば、特許文献１参照）。 2. Description of the Related Art Conventionally, as a method of forming a vertical hole in the ground, a caisson press-fitting method is known in which a press-fitting girder is placed on the upper part of a cylindrical caisson and the caisson is pressed into the ground by lowering the press-fitting girder with a jack. That is, when the caisson is press-fitted for one block of the jack (same as one step), the press-fitting girder is lifted with a crane, and a caisson with a height of one block is added to the upper part of the caisson, and again, The crane is placed on the upper part of the caisson to which the press-fitting girder is added, and the press-fitting girder is lowered with a jack. Thereafter, the above operation is repeated.
At this time, since an external crane is used to lift the press-fitting girder and add caisson, there is a problem that work efficiency is low, and when the wind is strong, the crane is blown by wind and the work must be interrupted or stopped. It was. Accordingly, a caisson press-fitting device provided with a press-fitting girder lifting device that supports the press-fitting girder so as to be movable up and down is disclosed (for example, see Patent Document 1).

特開平１０−１６８８９１号公報（第２−３頁、図１）JP-A-10-168891 (page 2-3, FIG. 1)

特許文献１に開示されたケーソン圧入装置は、圧入されたケーソンの周囲に複数の専用の圧入桁昇降装置を配置したものであって、圧入桁昇降装置は、地上に設置された圧入桁昇降用架台と、圧入桁昇降用架台に設けられたスライドガイドと、スライドガイドに案内されて昇降自在なガイド体と、ガイド体を昇降させる圧入桁昇降駆動機構とによって構成されている。そして、ガイド体は圧入桁に接続されている。したがって、外部のクレーンを用いる必要がなくなるため、作業能率の低下が防止され、強風時における作業の中断または中止が防止される。 The caisson press-fitting device disclosed in Patent Document 1 has a plurality of dedicated press-fitting girder lifting devices arranged around the caisson that has been press-fitted, and the press-fitting girder lifting device is for lifting a press-fitting girder installed on the ground. The frame includes a frame, a slide guide provided on the frame for raising and lowering the press-fit girder, a guide body that can be moved up and down by being guided by the slide guide, and a press-fit girder lift drive mechanism that lifts and lowers the guide body. The guide body is connected to the press-fitting girder. Accordingly, since it is not necessary to use an external crane, the work efficiency is prevented from being lowered, and the work is interrupted or stopped during a strong wind.

しかしながら、特許文献１に開示されたケーソン圧入装置は、専用の圧入桁昇降装置を使用するものであることから、圧入桁昇降装置の製造コストが加わることによってケーソン圧入装置の製造コストが上昇するという問題がある。特に、大径のケーソンを設置する場合には、多数の圧入桁昇降装置が必要になることから、製造コストの上昇と共に、圧入桁昇降装置を設置するための施工コストも上昇するという問題があった。
さらに、コンクリート製ケーソンを圧入する場合には、ケーソンを継ぎ足すタイミング毎に、圧入されたケーソンの上部の内周側および外周側の両側にコンクリート型枠を形成する作業や、ケーソンを圧入するタイミング毎に、ケーソンからコンクリート型枠を離す作業や、さらに、かかる作業のための足場を設置したり撤去したりする作業が必要であることから、作業が煩雑で、施工期間の短縮や施工コストの低減が阻害されていた。 However, since the caisson press-fitting device disclosed in Patent Document 1 uses a dedicated press-fitting girder lifting device, the manufacturing cost of the caisson press-fitting device increases due to the added manufacturing cost of the press-fitting girder lifting device. There's a problem. In particular, when a large-diameter caisson is installed, a large number of press-fitting girder lifting devices are required, which increases the manufacturing cost and the construction cost for installing the press-fitting girder lifting device. It was.
Furthermore, when press-fitting a concrete caisson, every time the caisson is added, work to form a concrete formwork on both the inner and outer sides of the upper part of the caisson that has been press-fitted, and the timing to press-fit the caisson Each time, it is necessary to separate the concrete formwork from the caisson, and to install and remove the scaffolding for such work, which is cumbersome, shortening the construction period and reducing the construction cost. Reduction was inhibited.

本発明は上記問題を解決するものであって、第１の目的は、安価に、作業能率の低下を防止し、強風時などにおける作業の中断又は中止を防止することができるケーソン圧入装置およびケーソン圧入工法を提供することにある。
また、第２の目的は、コンクリート製ケーソンを継ぎ足す作業を簡素かつ迅速にすることができるケーソン圧入装置およびケーソン圧入工法を提供することにある。
さらに、第３の目的は、コンクリート製ケーソン内の地盤（土砂）を撤去する掘削作業を円滑にすることができるケーソン圧入装置およびケーソン圧入工法を提供することにある。 The present invention solves the above problems, and a first object is to provide a caisson press-fitting device and a caisson that are inexpensive, can prevent work efficiency from being lowered, and can prevent work from being interrupted or stopped in times of strong winds. The purpose is to provide a press-in method.
A second object is to provide a caisson press-fitting device and a caisson press-fitting method capable of simplifying and speeding up the work of adding concrete caissons.
Furthermore, the third object is to provide a caisson press-fitting device and a caisson press-fitting method capable of facilitating excavation work for removing the ground (sediment) in a concrete caisson.

（１）本発明に係るケーソン圧入装置は、地盤に固定されたグランドアンカーに接続されるジャッキ反力引張材と、圧入ジャッキおよびリフトアップジャッキが固定された圧入桁と、圧入柱と、コンクリート型枠と、前記コンクリート型枠に挟まれたコンクリート打設部に打設されたケーソン躯体に埋め込まれ、上方に突出する支持部材とを具備し、
前記圧入ジャッキは、前記ジャッキ反力引張材に係止して前記圧入桁を下方に移動させることによって、前記圧入柱を介してケーソン躯体を地盤中に圧入し、
前記リフトアップジャッキは、前記支持部材に係止して前記圧入桁を上方に移動させることを特徴とする。 (1) A caisson press-fitting device according to the present invention includes a jack reaction force tension member connected to a ground anchor fixed to the ground, a press-fitting girder to which a press-fitting jack and a lift-up jack are fixed, a press-fitting column, and a concrete mold A frame and a support member embedded in a caisson housing placed in a concrete placement part sandwiched between the concrete molds and projecting upward;
The press-fit jack is engaged with the jack reaction force tension material and moves the press-fit girder downward to press-fit the caisson housing into the ground via the press-fit column.
The lift-up jack is engaged with the support member and moves the press-fitting girder upward.

（２）また、本発明に係るケーソン圧入装置は、地盤に固定されたグランドアンカーに接続されるジャッキ反力引張材と、圧入ジャッキおよびリフトアップジャッキが固定された圧入桁と、圧入柱と、前記リフトアップジャッキに昇降自在かつ自由落下不能に保持された支持部材と、コンクリート型枠とを具備し、
前記圧入ジャッキは、前記ジャッキ反力引張材に係止して前記圧入桁を下方に向かって移動させることによって、前記圧入柱を介してケーソン躯体を地盤中に圧入し、
前記リフトアップジャッキは、前記支持部材を下方に向かって移動して、前記支持部材の下面を前記ケーソン躯体の上面に押し付けることによって、前記圧入桁を上方に移動させることを特徴とする。 (2) Moreover, the caisson press-fitting device according to the present invention includes a jack reaction force tension member connected to a ground anchor fixed to the ground, a press-fitting girder to which the press-fitting jack and the lift-up jack are fixed, a press-fitting column, A support member held on the lift-up jack so that it can be raised and lowered and cannot fall freely; and a concrete formwork;
The press-fitting jack presses the caisson housing into the ground via the press-fitting pillars by locking the jack reaction force tension member and moving the press-fitting girder downward.
The lift-up jack moves the press-fitting girder upward by moving the support member downward and pressing the lower surface of the support member against the upper surface of the caisson housing.

（３）前記（２）において、前記圧入桁または前記圧入ジャッキに、前記ジャッキ反力引張材に係止して、前記圧入桁の自由落下を防止するストッパーが設けられていることを特徴とする。 (3) In the above (2), the press-fitting girder or the press-fitting jack is provided with a stopper that is locked to the jack reaction force tension member to prevent the press-fitting girder from falling freely. .

（４）前記（１）〜（３）において、前記圧入桁に懸架されたコンクリート型枠用足場と、前記コンクリート型枠用足場に固定され、前記コンクリート型枠を進退させるコンクリート型枠進退装置とを具備することを特徴とする。
（５）前記（１）〜（４）において、前記圧入柱が、前記圧入桁に設置されていることを特徴とする。 (4) In the above (1) to (3), a concrete formwork scaffold suspended from the press-fitting girder, and a concrete formwork advancing / retreating device fixed to the concrete formwork scaffold and moving the concrete formwork back and forth. It is characterized by comprising.
(5) In the above (1) to (4), the press-fitting pillar is installed in the press-fitting girder.

（６）さらに、本発明に係るケーソン圧入工法は、地盤に固定されたグランドアンカーに接続されるジャッキ反力引張材と、圧入ジャッキおよびリフトアップジャッキが固定された圧入桁と、圧入柱と、コンクリート型枠と、前記コンクリート型枠に挟まれたコンクリート打設部に打設されたケーソン躯体に埋め込まれ、上方に突出する支持部材とを具備し、前記圧入ジャッキは、前記ジャッキ反力引張材に係止して前記圧入桁を下方に移動させることによって、前記圧入柱を介してケーソン躯体を地盤中に圧入し、前記リフトアップジャッキは、前記支持部材に係止して前記圧入桁を上方に移動させケーソン圧入装置を用いたケーソン圧入工法であって、
既に圧入されているケーソン躯体の側面に連続して、該ケーソン躯体の上部にコンクリート型枠の下部を押し当てる工程と、
前記コンクリート型枠に挟まれたコンクリート打設部にコンクリートを打設する工程と、
前記打設されたコンクリートが固化して一体化したケーソン躯体の側面から前記コンクリート型枠を引き離す工程と、
前記リフトアップジャッキと前記支持部材との係止を開放して、前記圧入ジャッキを駆動して前記圧入桁を下方に移動させることによって、前記圧入柱を介して前記ケーソン躯体を地盤に圧入する工程と、
前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程と、
前記圧入ジャッキと前記ジャッキ反力引張材との係止を開放して、前記リフトアップジャッキを駆動して前記圧入桁を上方に移動させる工程と、
を繰り返すことを特徴とする。 (6) Furthermore, the caisson press-fitting method according to the present invention includes a jack reaction force tensile material connected to a ground anchor fixed to the ground, a press-fitting girder to which the press-fitting jack and the lift-up jack are fixed, a press-fitting column, A concrete formwork, and a support member that is embedded in a caisson housing placed in a concrete placement part sandwiched between the concrete formwork and protrudes upward, and the press-fit jack includes the jack reaction force tensile material. The caisson housing is press-fitted into the ground through the press-fitting pillars, and the lift-up jack is locked to the support member and the press-fitting girder is moved upward. Is a caisson press-in method using a caisson press-in device,
Continuously pressing the lower part of the concrete formwork on the upper part of the caisson housing, continuously to the side of the caisson housing already press-fitted,
Placing concrete in a concrete placement section sandwiched between the concrete molds;
A step of separating the concrete formwork from the side surface of the caisson housing in which the placed concrete is solidified and integrated;
The step of press-fitting the caisson housing into the ground via the press-fitting pillar by releasing the engagement between the lift-up jack and the support member and driving the press-fitting jack to move the press-fitting girder downward. When,
Removing the ground surrounded by the pressed caisson housing;
Unlocking the press-fit jack and the jack reaction force tension material, driving the lift-up jack and moving the press-fit girder upward;
It is characterized by repeating.

（７）前記（６）において、前記支持部材に延長ロッドを接合して支持部材の長さを延長する工程を有することを特徴とする。 (7) In the above (6), the method includes a step of extending the length of the support member by joining an extension rod to the support member.

（８）さらに、本発明に係るケーソン圧入工法は、地盤に固定されたグランドアンカーに接続されるジャッキ反力引張材と、圧入ジャッキおよびリフトアップジャッキが固定された圧入桁と、圧入柱と、前記リフトアップジャッキに昇降自在かつ自由落下不能に保持された支持部材と、コンクリート型枠とを具備し、
前記圧入ジャッキは、前記ジャッキ反力引張材に係止して前記圧入桁を下方に向かって移動させることによって、前記圧入柱を介してケーソン躯体を地盤中に圧入し、前記リフトアップジャッキは、前記支持部材を下方に向かって移動して、前記支持部材の下端を前記ケーソン躯体の上面に押し付けることによって、前記圧入桁を上方に移動させるケーソン圧入装置を用いたケーソン圧入工法であって、
既に圧入されているケーソン躯体の側面に連続して、該ケーソン躯体の上部にコンクリート型枠の下部を押し当てる工程と、
前記コンクリート型枠に挟まれたコンクリート打設部にコンクリートを打設する工程と、
前記打設されたコンクリートが固化して一体化したケーソン躯体の側面から前記コンクリート型枠を引き離す工程と、
前記リフトアップジャッキと前記支持部材との係止を開放して、前記圧入ジャッキを駆動して前記圧入桁を下方に移動させることによって、前記圧入柱を介して前記ケーソン躯体を地盤に圧入する工程と、
前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程と、
前記圧入ジャッキと前記ジャッキ反力引張材との係止を開放して、前記リフトアップジャッキを駆動して前記支持部材を下方に向けて移動させて、前記支持部材の下面を前記ケーソン躯体の上面に押し付けることによって、前記圧入桁を上方に移動させる工程と、
を繰り返すことを特徴とする。 (8) Furthermore, the caisson press-fitting method according to the present invention includes a jack reaction force tensile material connected to a ground anchor fixed to the ground, a press-fitting girder to which the press-fitting jack and the lift-up jack are fixed, a press-fitting column, A support member held on the lift-up jack so that it can be raised and lowered and cannot fall freely; and a concrete formwork;
The press-fit jack is engaged with the jack reaction force tension member and moves the press-fit girder downward to press-fit the caisson housing into the ground via the press-fit pillars. A caisson press-in method using a caisson press-fitting device that moves the press-in girder upward by moving the support member downward and pressing the lower end of the support member against the upper surface of the caisson housing,
Continuously pressing the lower part of the concrete formwork on the upper part of the caisson housing, continuously to the side of the caisson housing already press-fitted,
Placing concrete in a concrete placement section sandwiched between the concrete molds;
A step of separating the concrete formwork from the side surface of the caisson housing in which the placed concrete is solidified and integrated;
The step of press-fitting the caisson housing into the ground via the press-fitting pillar by releasing the engagement between the lift-up jack and the support member and driving the press-fitting jack to move the press-fitting girder downward. When,
Removing the ground surrounded by the pressed caisson housing;
The engagement between the press-fit jack and the jack reaction force tension member is released, the lift-up jack is driven to move the support member downward, and the lower surface of the support member is moved to the upper surface of the caisson housing. Moving the press-fitting girder upward by pressing against
It is characterized by repeating.

（９）前記（８）において、前記圧入桁または前記圧入ジャッキに、前記ジャッキ反力引張材に係止して、前記圧入桁の自由落下を防止するストッパーが設けられ、
前記コンクリート打設部を形成する工程において、前記ストッパーを駆動して、前記圧入桁の自由落下を防止することを特徴とする。 (9) In the above (8), the press-fitting girder or the press-fitting jack is provided with a stopper that is locked to the jack reaction force tension material to prevent the press-fitting girder from falling freely,
In the step of forming the concrete placing portion, the stopper is driven to prevent the press-fitting girder from falling freely.

（１０）前記（６）〜（９）において、前記ケーソン圧入装置は、前記圧入桁に懸架されたコンクリート型枠用足場と、前記コンクリート型枠用足場に固定され、前記コンクリート型枠を進退させるコンクリート型枠進退装置とを具備し、
前記コンクリート型枠を設置する工程において、前記コンクリート型枠進退装置が、前記コンクリート型枠を前記ケーソン躯体に向かって進出させ、
前記コンクリート型枠を引き離す工程において、前記コンクリート型枠進退装置が、前記コンクリート型枠を前記ケーソン躯体から離れる方向に退出させることを特徴とする。
（１１）前記（６）〜（１０）において、前記支持部材は、前記圧入桁と前記ケーソン躯体の上面との間に一時的に配置されるものであって、前記ケーソン躯体を地盤に圧入する工程の前に、前記支持部材は前記圧入桁と前記ケーソン躯体の上面との間に配置され、前記圧入桁を上方に移動させる工程においてあるいは前記圧入桁を上方に移動させる工程の後に、前記圧入柱は前記圧入桁と前記ケーソン躯体の上面との間から撤去されることを特徴とする。 (10) In (6) to (9), the caisson press-fitting device is fixed to the concrete formwork scaffold suspended from the press-fitting girder and the concrete formwork scaffold, and advances and retracts the concrete formwork. A concrete formwork advancing and retracting device,
In the step of installing the concrete formwork, the concrete formwork advancing / retreating device advances the concrete formwork toward the caisson housing,
In the step of separating the concrete formwork, the concrete formwork advancing / retreating device retracts the concrete formwork in a direction away from the caisson housing.
(11) In the above (6) to (10), the support member is temporarily disposed between the press-fitting girder and the upper surface of the caisson housing, and presses the caisson housing into the ground. Before the step, the support member is disposed between the press-fitting girder and the upper surface of the caisson housing, and in the step of moving the press-fitting girder upward or after the step of moving the press-fitting girder upward, the press-fitting The pillar is removed from between the press-fitting girder and the upper surface of the caisson housing.

（１２）さらに、本発明に係るケーソン圧入装置は、前記（１）〜（３）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の支持架構と、該支持架構に設置された取り付け柱と、該取り付け柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有し、
該コンクリート型枠用折り畳み足場は、一方の端部が前記取り付け柱に回動自在に設置された中段骨材および下段骨材と、
前記中段骨材の他方の端部および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する共通縦材と、
前記中段骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部および前記下段骨材の他方の端部が、前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材および前記共通縦材の少なくとも１つを支持するストッパー材と、
前記中段骨材に固定された中段床板と、
前記下段骨材に固定された下段床板と、
を具備することを特徴とする。 (12) Furthermore, the caisson press-fitting device according to the present invention is the support frame installed in the press-fitting girder and arranged on the inner peripheral side of the caisson housing in any one of the above (1) to (3). And a mounting column installed on the support frame, and a concrete form folding scaffold installed on the mounting column in a foldable manner,
The folding scaffold for the concrete formwork, the middle aggregate and the lower aggregate, one end of which is rotatably installed on the mounting column,
A common longitudinal member in which the other end portion of the middle-stage aggregate and the other end portion of the lower-stage aggregate are each rotatably installed and hold a posture parallel to the mounting column;
The other end of the middle-stage aggregate and the other end of the lower-stage aggregate can stand up so as to be higher than the one end of the middle-stage aggregate and the one end of the lower-stage aggregate, respectively. Thus, the other end of the middle aggregate and the other end of the lower aggregate do not fall down below one end of the middle aggregate and one end of the lower aggregate. A stopper material that supports at least one of the middle aggregate, the lower aggregate, and the common longitudinal member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
It is characterized by comprising.

（１３）さらに、本発明に係るケーソン圧入装置は、前記（１）〜（３）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の取り付け柱と、該取り付け柱に設置された水平方向の腹起こし材と、該腹起こし材に設置された上下方向の取り付け間柱と、該取り付け間柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有し、
該コンクリート型枠用折り畳み足場は、一方の端部が前記取り付け間柱に鉛直面内で回転可能に設置された中段骨材および下段骨材と、
前記中段骨材の他方の端部および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する共通縦材と、
前記中段骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部および前記下段骨材の他方の端部が、前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材および前記共通縦材の少なくとも１つを支持するストッパー材と、
前記中段骨材に固定された中段床板と、
前記下段骨材に固定された下段床板と、
を具備することを特徴とする。 (13) Further, the caisson press-fitting device according to the present invention is the vertical mounting column installed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing in any one of (1) to (3). A horizontal erection material installed on the mounting column, an up-and-down mounting column installed on the erection material, and a concrete formwork folding scaffold installed foldably on the mounting column Have
The concrete formwork folding scaffold has a middle aggregate and a lower aggregate, one end of which is installed on the mounting stud so as to be rotatable in a vertical plane;
A common longitudinal member in which the other end portion of the middle-stage aggregate and the other end portion of the lower-stage aggregate are each rotatably installed and hold a posture parallel to the mounting column;
The other end of the middle-stage aggregate and the other end of the lower-stage aggregate can stand up so as to be higher than the one end of the middle-stage aggregate and the one end of the lower-stage aggregate, respectively. Thus, the other end of the middle aggregate and the other end of the lower aggregate do not fall down below one end of the middle aggregate and one end of the lower aggregate. A stopper material that supports at least one of the middle aggregate, the lower aggregate, and the common longitudinal member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
It is characterized by comprising.

（１４）さらに、本発明に係るケーソン圧入装置は、前記（１）〜（３）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の支持架構と、該支持架構に設置された取り付け柱と、該取り付け柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有し、
該コンクリート型枠用折り畳み足場は、一方の端部が前記取り付け柱に回動自在に設置された中段骨材、下段骨材および補助骨材と、
前記中段骨材の他方の端部および前記補助骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する中段縦材と、
前記中段骨材の他方の端部寄りの位置および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する下段縦材と、
前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材、前記補助骨材、前記中段縦材および前記下段縦材の少なくとも１つを支持するストッパー材と、
前記中段骨材に固定された中段床板と、
前記下段骨材に固定された下段床板と、
を具備することを特徴とする。 (14) Furthermore, the caisson press-fitting device according to the present invention is the support frame in the vertical direction that is installed in the press-fitting girder and is arranged on the inner peripheral side of the caisson housing in any one of (1) to (3). And a mounting column installed on the support frame, and a concrete form folding scaffold installed on the mounting column in a foldable manner,
The concrete formwork folding scaffold has a middle aggregate, a lower aggregate and an auxiliary aggregate, one end of which is rotatably installed on the mounting column;
The other end of the middle aggregate and the other end of the auxiliary aggregate are rotatably installed, and a middle vertical member that holds a posture parallel to the mounting column;
A lower longitudinal member that is rotatably installed at a position near the other end of the middle aggregate and the other end of the lower aggregate, and holds a posture parallel to the mounting column;
The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate are respectively one end of the middle aggregate and one end of the auxiliary aggregate. The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate The middle aggregate and the lower bone so that the portions do not fall below one end of the middle aggregate, one end of the auxiliary aggregate, and one end of the lower aggregate, respectively. A stopper material that supports at least one of a material, the auxiliary aggregate, the middle vertical member, and the lower vertical member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
It is characterized by comprising.

（１５）さらに、本発明に係るケーソン圧入装置は、前記（１）〜（３）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の取り付け柱と、該取り付け柱に設置された水平方向の腹起こし材と、該腹起こし材に設置された上下方向の取り付け間柱と、該取り付け間柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有し、
該コンクリート型枠用折り畳み足場は、一方の端部が取り付け間柱に傾動自在に設置された中段骨材、下段骨材および補助骨材と、
前記中段骨材の他方の端部および前記補助骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け間柱に対して平行な姿勢を保持する中段縦材と、
前記中段骨材の他方の端部寄りの位置および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け間柱に対して平行な姿勢を保持する下段縦材と、
前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材、前記補助骨材、前記中段縦材および前記下段縦材の少なくとも１つを支持するストッパー材と、
前記中段骨材に固定された中段床板と、
前記下段骨材に固定された下段床板と、
を具備することを特徴とする。
（１６）さらに、前記（１２）〜（１５）の何れかにおいて、前記ストッパー材は、第１管体と、該第１管体に進退自在に挿入された第２管体とを具備し、前記第１管体の前記第２管体とは反対側の端部と、前記第２管体の前記第１管体とは反対側の端部との距離が、所定の長さよりも短くならないことを特徴とする。 (15) Further, the caisson press-fitting device according to the present invention is the vertical mounting column disposed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing in any of (1) to (3). A horizontal erection material installed on the mounting column, an up-and-down mounting column installed on the erection material, and a concrete formwork folding scaffold installed foldably on the mounting column Have
The concrete formwork folding scaffold has a middle aggregate, a lower aggregate and an auxiliary aggregate, one end of which is tiltably installed on the mounting stud,
A middle vertical member in which the other end of the middle aggregate and the other end of the auxiliary aggregate are each rotatably installed, and maintain a posture parallel to the mounting stud;
A lower longitudinal member that is rotatably installed at a position near the other end of the middle aggregate and the other end of the lower aggregate, and maintains a posture parallel to the mounting stud;
The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate are respectively one end of the middle aggregate and one end of the auxiliary aggregate. The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate The middle aggregate and the lower bone so that the portions do not fall below one end of the middle aggregate, one end of the auxiliary aggregate, and one end of the lower aggregate, respectively. A stopper material that supports at least one of a material, the auxiliary aggregate, the middle vertical member, and the lower vertical member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
It is characterized by comprising.
(16) Furthermore, in any one of the above (12) to (15), the stopper material includes a first tubular body and a second tubular body that is inserted into the first tubular body so as to freely advance and retract. The distance between the end of the first tube opposite to the second tube and the end of the second tube opposite to the first tube does not become shorter than a predetermined length. It is characterized by that.

（１７）さらに、本発明に係るケーソン圧入工法は、前記（６）〜（９）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の支持架構と、該支持架構に設置された取り付け柱と、該取り付け柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有するケーソン圧入装置を用いたケーソン圧入工法であって、
前記コンクリート型枠用折り畳み足場は、一方の端部が前記取り付け柱に回動自在に設置された中段骨材および下段骨材と、前記中段骨材の他方の端部および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する共通縦材と、前記中段骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部および前記下段骨材の他方の端部が、前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材および前記共通縦材の少なくとも１つを支持するストッパー材と、前記中段骨材に固定された中段床板と、前記下段骨材に固定された下段床板と、を具備し、
前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程に際して、前記共通縦材を上方に引き上げ、前記中段骨材および前記下段骨材を前記取り付け柱に対して平行にし、前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程が終了した際、前記共通縦材を下方に戻し、前記中段骨材および前記下段骨材を前記取り付け柱に対して垂直にすることを特徴とする。 (17) Further, in the caisson press-fitting method according to the present invention, in any of the above (6) to (9), the vertical support frame installed on the press-fitting girder and disposed on the inner peripheral side of the caisson housing A caisson press-in method using a caisson press-in apparatus having a mounting column installed on the support frame, and a folding scaffold for a concrete form that is foldable on the mounting column,
The concrete formwork folding scaffold has a middle aggregate and a lower aggregate whose one end is rotatably installed on the mounting column, and the other end of the middle aggregate and the other of the lower aggregate End portions of each of which are rotatably installed, a common longitudinal member that maintains a posture parallel to the mounting column, the other end portion of the middle aggregate and the other end portion of the lower aggregate, The other end of the middle aggregate and the other end of the lower aggregate can stand up so as to be higher than one end of the middle aggregate and the one end of the lower aggregate, respectively. Support at least one of the middle aggregate, the lower aggregate, and the common longitudinal so as not to fall below one end of the middle aggregate and one end of the lower aggregate A stopper material, and a middle floor board fixed to the middle aggregate Anda lower floor plate fixed to the lower aggregate,
In the step of removing the ground surrounded by the pressed caisson housing, the common longitudinal member is pulled upward, the middle and lower aggregates are made parallel to the mounting column, and the inserted caisson When the step of removing the ground surrounded by the frame is completed, the common longitudinal member is returned downward, and the middle and lower aggregates are made perpendicular to the mounting column.

（１８）さらに、本発明に係るケーソン圧入工法は、前記（６）〜（９）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の取り付け柱と、該取り付け柱に設置された水平方向の腹起こし材と、該腹起こし材に設置された上下方向の取り付け間柱と、該取り付け間柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有するケーソン圧入装置を用いたケーソン工法であって、
前記コンクリート型枠用折り畳み足場は、一方の端部が前記取り付け間柱に鉛直面内で回転可能に設置された中段骨材および下段骨材と、前記中段骨材の他方の端部および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する共通縦材と、前記中段骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部および前記下段骨材の他方の端部が、前記中段骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材および前記共通縦材の少なくとも１つを支持するストッパー材と、前記中段骨材に固定された中段床板と、前記下段骨材に固定された下段床板と、を具備し、
前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程に際して、前記共通縦材を上方に引き上げ、前記中段骨材および前記下段骨材を取り付け間柱に対して平行にし、前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程が終了した際、前記共通縦材を下方に戻し、前記中段骨材および前記下段骨材を取り付け間柱に対して垂直にすることを特徴とする。 (18) Furthermore, the caisson press-fitting method according to the present invention is the vertical mounting column installed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing in any of (6) to (9). A horizontal erection material installed on the mounting column, an up-and-down mounting column installed on the erection material, and a concrete formwork folding scaffold installed foldably on the mounting column A caisson method using a caisson press-fitting device,
The concrete formwork folding scaffold includes a middle aggregate and a lower aggregate, one end of which is rotatably installed in a vertical plane on the mounting stud, and the other end of the middle aggregate and the lower bone A common longitudinal member that is pivotably installed at the other end of the member and maintains a posture parallel to the mounting column, the other end of the middle step aggregate, and the other end of the lower step aggregate And the other end of the middle aggregate and the other end of the lower aggregate can be raised so that the respective parts are higher than one end of the middle aggregate and the one end of the lower aggregate At least one of the middle-stage aggregate, the lower-stage aggregate, and the common longitudinal so that one end of the middle-stage aggregate does not fall below one end of the middle-stage aggregate and one end of the lower-stage aggregate. The stopper material that supports the two and fixed to the middle aggregate Comprising a middle floor, and the lower floor plate fixed to the lower aggregate, the,
In the step of removing the ground surrounded by the press-fitted caisson housing, the common longitudinal member is pulled upward, the middle and lower aggregates are made parallel to the mounting stud, and the press-fitted caisson housing When the step of removing the ground surrounded by is finished, the common longitudinal member is returned downward, and the middle and lower aggregates are made perpendicular to the mounting studs.

（１９）さらに、本発明に係るケーソン圧入工法は、前記（６）〜（９）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の支持架構と、該支持架構に設置された取り付け柱と、該取り付け柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有するケーソン圧入装置を用いたケーソン圧入工法であって、
前記コンクリート型枠用折り畳み足場は、一方の端部が前記取り付け柱に回動自在に設置された中段骨材、下段骨材および補助骨材と、前記中段骨材の他方の端部および前記補助骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する中段縦材と、前記中段骨材の他方の端部寄りの位置および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け柱に対して平行な姿勢を保持する下段縦材と、前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材、前記補助骨材、前記中段縦材および前記下段縦材の少なくとも１つを支持するストッパー材と、前記中段骨材に固定された中段床板と、前記下段骨材に固定された下段床板と、を具備し、
前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程に際して、前記中段縦材を上方に引き上げ、前記中段骨材、前記補助骨材および前記下段骨材を前記取り付け柱に対して平行にし、前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程が終了した際、前記中段縦材を下方に戻し、前記中段骨材、前記補助骨材および前記下段骨材を前記取り付け柱に対して垂直にすることを特徴とする。 (19) Further, in the caisson press-fitting method according to the present invention, in any of the above (6) to (9), the vertical support frame installed on the press-fitting girder and disposed on the inner peripheral side of the caisson housing A caisson press-in method using a caisson press-in apparatus having a mounting column installed on the support frame, and a folding scaffold for a concrete form that is foldable on the mounting column,
The concrete formwork folding scaffold includes a middle aggregate, a lower aggregate and an auxiliary aggregate, one end of which is rotatably installed on the mounting column, and the other end of the middle aggregate and the auxiliary A middle vertical member in which the other end of the aggregate is rotatably installed and maintains a posture parallel to the mounting column, a position near the other end of the middle aggregate, and the lower aggregate Each of the other end portions of the lower-stage vertical member that is rotatably installed and maintains a posture parallel to the mounting column, the other end portion of the middle-stage aggregate, and the other end portion of the auxiliary aggregate And the other end of the lower-stage aggregate stands up above the one end of the middle-stage aggregate, the one end of the auxiliary aggregate, and the one end of the lower-stage aggregate, respectively. The other end of the middle aggregate and the other end of the auxiliary aggregate The other end of the fine the lower aggregate is one end of each of the middle aggregate, so as not to fall down below the one end of the one end portion and the lower aggregate of the auxiliary aggregate A stopper member that supports at least one of the middle-stage aggregate, the lower-stage aggregate, the auxiliary aggregate, the middle-stage vertical member, and the lower-stage vertical member, a middle-stage floor plate fixed to the middle-stage aggregate, and the lower-stage aggregate A lower floor board fixed to the aggregate,
In the step of removing the ground surrounded by the press-fitted caisson housing, the middle vertical member is pulled upward, and the middle aggregate, the auxiliary aggregate and the lower aggregate are parallel to the mounting column, When the step of removing the ground surrounded by the pressed caisson housing is completed, the middle vertical member is returned downward, and the middle aggregate, the auxiliary aggregate, and the lower aggregate are attached to the mounting column. It is characterized by being vertical.

（２０）さらに、本発明に係るケーソン圧入工法は、前記（６）〜（９）の何れかにおいて、前記圧入桁に設置され、前記ケーソン躯体の内周側に配置された上下方向の取り付け柱と、該取り付け柱に設置された水平方向の腹起こし材と、該腹起こし材に設置された上下方向の取り付け間柱と、該取り付け間柱に折り畳み自在に設置されたコンクリート型枠用折り畳み足場とを有するケーソン圧入装置を用いたケーソン圧入工法であって、
前記コンクリート型枠用折り畳み足場は、一方の端部が取り付け間柱に傾動自在に設置された中段骨材、下段骨材および補助骨材と、前記中段骨材の他方の端部および前記補助骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け間柱に対して平行な姿勢を保持する中段縦材と、前記中段骨材の他方の端部寄りの位置および前記下段骨材の他方の端部がそれぞれ回動自在に設置され、前記取り付け間柱に対して平行な姿勢を保持する下段縦材と、前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも上方になるように起立自在で、前記中段骨材の他方の端部、前記補助骨材の他方の端部および前記下段骨材の他方の端部が、それぞれ前記中段骨材の一方の端部、前記補助骨材の一方の端部および前記下段骨材の一方の端部よりも下方に倒伏しないように、前記中段骨材、前記下段骨材、前記補助骨材、前記中段縦材および前記下段縦材の少なくとも１つを支持するストッパー材と、前記中段骨材に固定された中段床板と、前記下段骨材に固定された下段床板と、を具備し、
前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程に際して、前記中段縦材を上方に引き上げ、前記中段骨材、前記補助骨材および前記下段骨材を取り付け間柱に対して平行にし、前記圧入されたケーソン躯体に囲まれた地盤を撤去する工程が終了した際、前記中段縦材を下方に戻し、前記中段骨材、前記補助骨材および前記下段骨材を取り付け間柱に対して垂直にすることを特徴とする。 (20) Furthermore, the caisson press-fitting method according to the present invention is the vertical mounting column installed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing in any of (6) to (9). A horizontal erection material installed on the mounting column, an up-and-down mounting column installed on the erection material, and a concrete formwork folding scaffold installed foldably on the mounting column A caisson press-fitting method using a caisson press-fitting device,
The folding scaffold for concrete formwork includes a middle stage aggregate, a lower stage aggregate and an auxiliary aggregate, one end of which is installed to be freely tiltable on a mounting stud, and the other end of the middle stage aggregate and the auxiliary aggregate. The other end of each of the lower tiers is installed in a rotatable manner and maintains a posture parallel to the mounting stud, a position near the other end of the middle tier aggregate, and the other of the lower tier aggregates disposed end of rotatably respectively, wherein the lower longitudinal member for holding a posture parallel to the mounting studs, the other end of the middle aggregate, the other end of the auxiliary aggregate and the the other end of the lower aggregate is one end of each of the middle aggregate, freely standing to be higher than the one end portion of the one end portion and the lower aggregate of the auxiliary aggregate , The other end of the middle aggregate, the other end of the auxiliary aggregate The other end of the pre-said lower aggregate is one end of each of the middle aggregate, so as not to fall down below the one end of the one end portion and the lower aggregate of the auxiliary aggregate A stopper member that supports at least one of the middle-stage aggregate, the lower-stage aggregate, the auxiliary aggregate, the middle-stage vertical member, and the lower-stage vertical member, a middle-stage floor plate fixed to the middle-stage aggregate, and the lower-stage aggregate A lower floor board fixed to the aggregate,
In the process of removing the ground surrounded by the press-fitted caisson housing, the middle vertical member is pulled upward, the middle aggregate, the auxiliary aggregate and the lower aggregate are made parallel to the mounting column, When the step of removing the ground surrounded by the caisson housing that has been press-fitted is completed, the middle vertical member is returned downward, and the middle aggregate, the auxiliary aggregate, and the lower aggregate are perpendicular to the mounting stud. It is characterized by doing.

（ｉ）本発明に係るケーソン圧入装置およびケーソン圧入工法は、ケーソン躯体に埋め込まれた支持部材を具備し、圧入ジャッキはジャッキ反力引張材に係止して圧入桁を下方に移動させて、ケーソン躯体を地盤中に圧入し、リフトアップジャッキは、支持部材に係止して圧入桁を上方に移動させる。したがって、ケーソン躯体を圧入する度に、圧入桁を持ち上げるために、外部のクレーンや、専用の圧入桁昇降装置等を使用することが不要になるため、ケーソン圧入装置の製造コストを安価に抑えることができ、また、作業が簡素になるため、施工の迅速化や施工コストの低廉化を図ることができる。 (I) A caisson press-fitting device and a caisson press-fitting method according to the present invention include a support member embedded in a caisson housing, and the press-fitting jack is engaged with a jack reaction force tension member to move the press-fitting girder downward, The caisson housing is press-fitted into the ground, and the lift-up jack is engaged with the support member to move the press-fitting girder upward. Therefore, it is not necessary to use an external crane or a dedicated presser girder lifting device to lift the presser girder every time the caisson housing is press-fitted. In addition, since the work is simplified, construction can be speeded up and construction cost can be reduced.

（ｉｉ）また、圧入桁にコンクリート型枠用足場が固定され、コンクリート型枠を進退自在に支持するコンクリート型枠進退機構がコンクリート型枠用足場に設けられている。
したがって、ケーソン躯体の圧入を繰り返す度に、コンクリート型枠やコンクリート型枠用足場の設置および撤去を繰り返す必要がなくなるから、コンクリート型枠用足場の設置および撤去のために繰り返し発生していたコストが不要になる。
特に、ケーソン躯体が地盤の深い位置にまで圧入された場合でも、コンクリート型枠用足場を設置するために、高い技能や長い時間を必要とすることがなくなるから、作業が迅速になり、施工工期の短縮や施工コストの低減が促進される。
さらに、コンクリート型枠進退機構を具備しているから、コンクリート打設部の形成作業やコンクリート型枠のケーソン躯体からの引き離し作業が容易になり、施工期間の短縮化や施工コストの低廉化がさらに促進される。 (Ii) Further, a concrete formwork scaffold is fixed to the press-fitting girder, and a concrete formwork advancing / retreating mechanism for supporting the concrete formwork so as to freely advance and retreat is provided in the concrete formwork scaffold.
Therefore, it is no longer necessary to repeat the installation and removal of the concrete formwork and the concrete formwork scaffold each time the caisson frame is repeatedly press-fitted, so the costs that have been incurred repeatedly for the installation and removal of the concrete formwork scaffolding are eliminated. It becomes unnecessary.
In particular, even when the caisson frame is pressed into a deep position in the ground, it does not require high skill and long time to install the concrete formwork scaffolding, so the work becomes quick and the construction period And shortening construction costs are promoted.
In addition, since the concrete formwork advancing and retracting mechanism is provided, the work of forming the concrete placement part and the work of pulling the concrete formwork away from the caisson housing become easy, further shortening the construction period and lowering the construction cost. Promoted.

（ｉｉｉ）さらに、ケーソン躯体に埋め込まれた支持部材に代えて、リフトアップジャッキに昇降自在かつ自由落下不能に保持された支持部材を具備することによって、支持部材を延長する継ぎ足し作業が不要になるため、施工期間の短縮化や施工コストの低廉化をさらに図ることができる。 (Iii) Furthermore, by replacing the support member embedded in the caisson housing with the support member that is held on the lift-up jack so that it can be raised and lowered and cannot be freely dropped, an extension work for extending the support member becomes unnecessary. Therefore, the construction period can be shortened and the construction cost can be further reduced.

さらに、コンクリート型枠用折り畳み足場を具備するケーソン圧入装置およびこれを用いたケーソン圧入工法は、圧入されたケーソン躯体に囲まれた地盤を撤去する工程に際して、中段縦材を上方に引き上げることによって、中段骨材や下段骨材等を取り付け柱に近接させ、取り付け柱に対して平行に折り畳むことができる。したがって、掘削機器によって圧入されたケーソン躯体に囲まれた地盤を撤去する際、特に、ケーソン躯体に近い範囲において掘削機器が作業用の足場に干渉しないため、地盤の撤去作業が容易かつ迅速になるから、施工期間の短縮化や施工コストの低廉化をさらに図ることができる。 Furthermore, the caisson press-fitting device having a folding scaffold for concrete formwork and the caisson press-fitting method using the caisson press-fitting method, in the process of removing the ground surrounded by the press-fitted caisson skeleton, raise the middle vertical member upward, The middle aggregate, the lower aggregate, and the like can be brought close to the mounting column and folded in parallel to the mounting column. Therefore, when removing the ground surrounded by the caisson enclosure that has been press-fitted by the excavating equipment, the excavation equipment does not interfere with the work scaffold, especially in the area close to the caisson enclosure, so that the removal work of the ground becomes easy and quick. Therefore, the construction period can be shortened and the construction cost can be further reduced.

本発明の実施の形態１に係るケーソン圧入装置を説明する側面視の断面図。Sectional drawing of the side view explaining the caisson press-fit apparatus which concerns on Embodiment 1 of this invention. 図１に示すケーソン圧入装置の使用状況を示す平面図。The top view which shows the use condition of the caisson press-fit apparatus shown in FIG. 本発明の実施の形態２に係るケーソン圧入工法における各工程に沿って作業状況を説明する側面視の断面図。Sectional drawing of the side view explaining an operation | work condition along each process in the caisson press-fitting method which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係るケーソン圧入工法における各工程に沿って作業状況を説明する側面視の断面図。Sectional drawing of the side view explaining an operation | work condition along each process in the caisson press-fitting method which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係るケーソン圧入装置を説明する側面視の断面図。Sectional drawing of the side view explaining the caisson press-fit apparatus which concerns on Embodiment 3 of this invention. 図５に示すケーソン圧入装置の使用状況を示す平面図。The top view which shows the use condition of the caisson press-fit apparatus shown in FIG. 本発明の実施の形態４に係るケーソン圧入工法における各工程に沿って作業状況を説明する側面視の断面図。Sectional drawing of the side view explaining an operation | work condition along each process in the caisson press-fitting method which concerns on Embodiment 4 of this invention. 本発明の実施の形態４に係るケーソン圧入工法における各工程に沿って作業状況を説明する側面視の断面図。Sectional drawing of the side view explaining an operation | work condition along each process in the caisson press-fitting method which concerns on Embodiment 4 of this invention. 本発明の実施の形態５に係るケーソン圧入装置を説明する全体を示す側面視の断面図。Sectional drawing of the side view which shows the whole explaining the caisson press-fit apparatus which concerns on Embodiment 5 of this invention. 図９に示すケーソン圧入装置の一部（ロッドずれ止め）を抜き出して示す斜視図。The perspective view which extracts and shows a part (rod slip prevention) of the caisson press-fitting device shown in FIG. 本発明の実施の形態６に係るケーソン圧入工法における各工程に沿って作業状況を説明する側面視の断面図。Sectional drawing of the side view explaining a work condition along each process in the caisson press-fitting method which concerns on Embodiment 6 of this invention. 本発明の実施の形態６に係るケーソン圧入工法における各工程に沿って作業状況を説明する側面視の断面図。Sectional drawing of the side view explaining a work condition along each process in the caisson press-fitting method which concerns on Embodiment 6 of this invention. 本発明の実施の形態７に係るケーソン圧入装置を説明するものであって、ケーソン躯体の内側から外側に向かって見た立面図。The caisson press-fitting device concerning Embodiment 7 of the present invention is an elevational view seen from the inside to the outside of the caisson housing. 本発明の実施の形態７に係るケーソン圧入装置を説明する中段部を示す平面図。The top view which shows the middle step explaining the caisson press-fitting device concerning Embodiment 7 of this invention. 本発明の実施の形態７に係るケーソン圧入装置を説明する下段部を示す平面図。The top view which shows the lower stage explaining the caisson press-fitting apparatus which concerns on Embodiment 7 of this invention. 本発明の実施の形態７に係るケーソン圧入装置を説明するものであって、展開した状態を示す側面図。The side view which shows the caisson press-fit apparatus which concerns on Embodiment 7 of this invention, and shows the expand | deployed state. 本発明の実施の形態７に係るケーソン圧入装置を説明するものであって、折り畳んだ状態を示す側面図。The side view which shows the caisson press-fit apparatus which concerns on Embodiment 7 of this invention, and shows the folded state. 本発明の実施の形態７に係るケーソン圧入装置を説明するものであって、腹起こし材が円弧状である場合を示す平面図。The top view which shows the case where a caisson press-fitting apparatus which concerns on Embodiment 7 of this invention is demonstrated, and a belly raising material is circular arc shape. 本発明の実施の形態８に係るケーソン圧入装置を説明するものであって、展開した状態を示す側面図。The side view which shows the caisson press injection apparatus which concerns on Embodiment 8 of this invention, and shows the expand | deployed state. 本発明の実施の形態８に係るケーソン圧入装置を説明するものであって、折り畳んだ状態を示す側面図。The side view which shows the caisson press-fit apparatus which concerns on Embodiment 8 of this invention, and shows the folded state. 本発明の実施の形態８に係るケーソン圧入装置を説明するものであって、ストッパー材の変形例を示す側面図であって、（ａ）は固定式、（ｂ）は引っ張り式、（ｃ）はシリンダ式。8 is a side view illustrating a modified example of the stopper material, illustrating a caisson press-fitting device according to an eighth embodiment of the present invention, wherein (a) is a fixed type, (b) is a tension type, and (c). Is a cylinder type. 本発明の実施の形態９に係るケーソン圧入工法を説明するものであって、作業の一部の工程における作業状況を説明する側面視の断面図。The caisson press-fitting method which concerns on Embodiment 9 of this invention, Comprising: Sectional drawing of the side view explaining the working condition in the one part process of work.

［実施の形態１］
図１および図２は本発明の実施の形態１に係るケーソン圧入装置を説明するものであって、図１は側面視の断面図、図２の（ａ）および（ｂ）はそれぞれ使用状況を示す平面図である。なお、各部は模式的に示すものであって、本発明は図示された形態（形状や数量等）に限定されるものではない。 [Embodiment 1]
1 and 2 illustrate a caisson press-fitting device according to Embodiment 1 of the present invention. FIG. 1 is a sectional view in side view, and FIGS. FIG. In addition, each part is shown typically and this invention is not limited to the form (shape, quantity, etc.) illustrated.

（ケーソン圧入装置）
図１において、ケーソン圧入装置１００は、地盤９０に固定されたグランドアンカー９９ａ、９９ｂに接続具９８ａ、９８ｂによって接続されるジャッキ反力引張材１ａ、１ｂと、圧入ジャッキ３ａ、３ｂおよびリフトアップジャッキ４ａ、４ｂが固定された圧入桁２と、圧入柱５ａ、５ｂと、外周側コンクリート型枠７ａおよび内周側コンクリート型枠７ｂと、外周側コンクリート型枠７ａおよび内周側コンクリート型枠７ｂによって囲まれたコンクリート打設部７ｃに打設されたコンクリート８（図３の（ｂ）参照）に埋め込まれ、上方に突出する支持部材６ａ、６ｂとを具備している。 (Caisson press-fitting device)
In FIG. 1, a caisson press-fitting device 100 includes jack reaction force tension members 1a and 1b connected to ground anchors 99a and 99b fixed to a ground 90 by connecting tools 98a and 98b, press-fit jacks 3a and 3b, and a lift-up jack. 4a, 4b is fixed by press-fitting girder 2, press-fitting columns 5a, 5b, outer concrete frame 7a and inner concrete frame 7b, outer concrete mold 7a and inner concrete frame 7b. Support members 6a and 6b are provided which are embedded in concrete 8 (see FIG. 3B) placed in the enclosed concrete placing portion 7c and project upward.

そして、ケーソン躯体９によって囲まれた範囲は、掘削底面９２まで、掘削（当該範囲の地盤が撤去）されている。
なお、以下の説明（含む「符号の説明」）において、同じ内容については符号の添え字「ａ、ｂ」や符号の修飾語「外周側、内周側」の記載を省略する場合がある。
なお、ジャッキ反力引張材１ａ、１ｂ（およびこれを係止する圧入ジャッキ３ａ、３ｂ）の数量や、支持部材６ａ、６ｂ（およびこれを係止するリフトアップジャッキ４ａ、４ｂ）の数量や、圧入柱５ａ、５ｂの数量は、何れも限定するものではなく、適宜、１個（１本）や３個（３本）以上にしてもよい。
また、グランドアンカー９９の上端の位置（接続具９８の位置）は限定するものではなく、地盤面９１から十分に長い範囲が突出して、グランドアンカー９９自体がジャッキ反力引張材１として機能するようにしてもよい。このとき、接続具９８は不要になるから、「地盤９０に固定されたグランドアンカー９９に接続具９８によって接続されるジャッキ反力引張材１」は「地盤９０に固定されるグランドアンカー９９であるジャッキ反力引張材１」に均等である。 The range surrounded by the caisson housing 9 is excavated (the ground in the range is removed) up to the excavation bottom surface 92.
In the following description (including “description of reference”), the description of the same contents may be omitted from the suffixes “a, b” of the reference and the modifier “outer side, inner side”.
The number of jack reaction force tension members 1a, 1b (and press-fit jacks 3a, 3b for locking them), the number of support members 6a, 6b (and lift-up jacks 4a, 4b for locking them), The number of press-fitting columns 5a and 5b is not limited, and may be one (one) or three (three) or more as appropriate.
Further, the position of the upper end of the ground anchor 99 (the position of the connection tool 98) is not limited, and a sufficiently long range protrudes from the ground surface 91 so that the ground anchor 99 itself functions as the jack reaction force tension member 1. It may be. At this time, since the connection tool 98 becomes unnecessary, “the jack reaction force tensile material 1 connected to the ground anchor 99 fixed to the ground 90 by the connection tool 98” is “the ground anchor 99 fixed to the ground 90”. It is equivalent to the jack reaction force tension material 1 ”.

圧入ジャッキ３は、リフトアップジャッキ４と支持部材６との係止を開放した状態で、ジャッキ反力引張材１に係止して、ジャッキ反力引張材１の圧入ジャッキ３よりも下方部分を上方に引き上げることによって、圧入桁２を下方に移動させる。このとき、圧入桁２とケーソン躯体９の上面との間に圧入柱５が配置され、圧入柱５を介してケーソン躯体１０は地盤９０に圧入される（これについては実施の形態２において詳細に説明する）。
リフトアップジャッキ４は、圧入ジャッキ３とジャッキ反力引張材１との係止を開放した状態で、支持部材６に係止して、支持部材６を下方に移動させるものである。すなわち、支持部材６の下部がケーソン躯体９に埋め込まれた（固定された）状態で、支持部材６が下方に移動されると、圧入桁２が上方に移動することになる。 The press-fit jack 3 is locked to the jack reaction force tension member 1 with the lift-up jack 4 and the support member 6 unlocked, and the jack reaction force tension member 1 has a lower portion than the press-fit jack 3. The press-fitting girder 2 is moved downward by pulling it upward. At this time, the press-fitting column 5 is disposed between the press-fitting girder 2 and the upper surface of the caisson housing 9, and the caisson housing 10 is press-fitted into the ground 90 through the press-fitting column 5 (this will be described in detail in the second embodiment). explain).
The lift-up jack 4 is engaged with the support member 6 in a state where the engagement between the press-fit jack 3 and the jack reaction force tension member 1 is released, and moves the support member 6 downward. That is, when the support member 6 is moved downward in a state where the lower portion of the support member 6 is embedded (fixed) in the caisson housing 9, the press-fitting girder 2 moves upward.

なお、本発明は、圧入ジャッキ３およびリフトアップジャッキ４の型式を限定するものではなく、それぞれジャッキ反力引張材１および支持部材６を開放自在に把持する把持機構（コレットチャック等）を有し、把持機構が設置されたピストンまたはシリンダを、シリンダまたはピストンに対して移動させるものである。
また、本発明は、ジャッキ反力引張材１および支持部材６の形状（外面形状）を限定するものではなく、例えば、棒材や管材であるが、ジャッキ反力引張材１は前記把持機構による把持を確実にするため、外面に環状の凹凸が軸方向に繰り返し複数形成されているものが好ましい。 The present invention does not limit the types of the press-fit jack 3 and the lift-up jack 4, but has a gripping mechanism (such as a collet chuck) that grips the jack reaction force tension material 1 and the support member 6 in a releasable manner. The piston or cylinder provided with the gripping mechanism is moved relative to the cylinder or piston.
Further, the present invention does not limit the shape (outer surface shape) of the jack reaction force tension material 1 and the support member 6, and is, for example, a bar material or a tube material. In order to ensure gripping, it is preferable that a plurality of annular irregularities are repeatedly formed on the outer surface in the axial direction.

外周側コンクリート型枠７ａは、地盤面９１に設置された外周側コンクリート型枠用足場１１ａに取り付けられ、内周側コンクリート型枠７ｂは、圧入されたケーソン躯体９の内周面に設置された内周側コンクリート型枠用足場１１ｂに取り付けられている。なお、外周側コンクリート型枠７ａおよび内周側コンクリート型枠７ｂは、何れも複数の部材（板材や管材ないし棒材等）によって形成されている。 The outer periphery side concrete formwork 7a is attached to the outer periphery side concrete formwork scaffold 11a installed on the ground surface 91, and the inner periphery side concrete formwork 7b is installed on the inner periphery surface of the press-fitted caisson housing 9. It is attached to the inner periphery side concrete formwork scaffold 11b. The outer peripheral side concrete mold 7a and the inner peripheral side concrete mold 7b are each formed by a plurality of members (plate material, pipe material, bar material, etc.).

外周側コンクリート型枠用足場１１ａは、ケーソン躯体９を圧入する際（圧入桁２を下方に移動させる際）、圧入桁２に干渉しない位置に移動させられるか、一旦解体され、再度、コンクリート打設部７ｃを形成する位置に移動または組み立てられる。
また、内周側コンクリート型枠用足場１１ｂは、ケーソン躯体９を圧入する際（圧入桁２を下方に移動させる際）、圧入桁２に干渉しない位置に移動するか、一旦撤去して、再度、コンクリート打設部７ｃを形成するために、新たに、ケーソン躯体９の内周面に取り付けられるか、元の位置に戻して上方に継ぎ足される。
なお、内周側コンクリート型枠用足場１１ｂをケーソン躯体９の内周面に取り付ける要領は限定するものではなく、例えば、内周面に固定ボルトを植え込むことによって、内周側コンクリート型枠用足場１１ｂを取り付けている。 When the caisson housing 9 is press-fitted (when the press-fitting girder 2 is moved downward), the outer periphery side concrete formwork scaffold 11a is moved to a position where it does not interfere with the press-fitting girder 2, or once disassembled, and again cast into concrete. It is moved or assembled to a position where the installation portion 7c is formed.
Also, when the caisson housing 9 is press-fitted (when the press-fitting girder 2 is moved downward), the inner periphery side concrete formwork scaffold 11b moves to a position where it does not interfere with the press-fitting girder 2 or is removed once and again. In order to form the concrete placing portion 7c, it is newly attached to the inner peripheral surface of the caisson housing 9 or returned to the original position and added upward.
In addition, the point which attaches the inner periphery side concrete formwork scaffold 11b to the inner peripheral surface of the caisson housing 9 is not limited, for example, by implanting a fixing bolt on the inner peripheral surface, the inner periphery side concrete formwork scaffold 11b is attached.

図２の（ａ）において、ケーソン圧入装置１００は、平面視矩形状のケーソン躯体９の四隅にそれぞれ配置されている。このとき、ケーソン圧入装置１００は、１個のリフトアップジャッキ４ａおよび１本の支持部材６ａを具備している。なお、コンクリート型枠７およびコンクリート型枠用足場１１が撤去された状態を示している。
図２の（ｂ）において、ケーソン圧入装置１００は、平面視円形状のケーソン躯体９の上方を覆うように、井桁状に配置されている。このとき、隣接するケーソン圧入装置１００同士では、ジャッキ反力引張材１および圧入ジャッキ３を共通にしている。すなわち、双方の圧入桁２が当接し、一方の圧入桁２に固定された圧入ジャッキ３によって、他方の圧入桁２が下方に移動させられる。なお、井桁状に配置される場合であっても、ケーソン圧入装置１００毎にジャッキ反力引張材１および圧入ジャッキ３を具備してもよい。なお、コンクリート型枠７およびコンクリート型枠用足場１１が撤去された状態を示している。 In FIG. 2A, the caisson press-fitting device 100 is disposed at each of the four corners of the caisson housing 9 having a rectangular shape in plan view. At this time, the caisson press-fitting device 100 includes one lift-up jack 4a and one support member 6a. In addition, the concrete form 7 and the concrete formwork scaffold 11 are shown in a removed state.
In FIG. 2B, the caisson press-fitting device 100 is arranged in a cross-beam shape so as to cover the upper part of the caisson housing 9 having a circular shape in plan view. At this time, the adjacent caisson press-fitting devices 100 share the jack reaction force tension material 1 and the press-fitting jack 3. That is, both the press-fitting girders 2 are brought into contact with each other, and the other press-fitting girder 2 is moved downward by the press-fitting jack 3 fixed to the one press-fitting girder 2. In addition, even if it is a case where it arrange | positions in a cross-beam shape, you may comprise the jack reaction force tension | tensile_strength material 1 and the press-fit jack 3 for every caisson press-fit apparatus 100. FIG. In addition, the concrete form 7 and the concrete formwork scaffold 11 are shown in a removed state.

以上のように、本発明のケーソン圧入装置１００によると、ケーソン躯体９を圧入する度に、圧入桁２を持ち上げるために、外部のクレーンや、専用の圧入桁昇降装置（ケーソン躯体９の周囲に配置される）を使用することが不要になるため、ケーソン圧入装置１００の製造コストを安価に抑えることができる。 As described above, according to the caisson press-fitting device 100 of the present invention, every time the caisson housing 9 is press-fitted, an external crane or a dedicated press-fitting elevating device (around the caisson housing 9 is used to lift the press-fitting girder 2. Therefore, the manufacturing cost of the caisson press-fitting device 100 can be reduced.

［実施の形態２］
図３および図４は本発明の実施の形態２に係るケーソン圧入工法を説明するものであって、各工程に沿って作業状況を説明する側面視の断面図である。なお、実施の形態１と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。 [Embodiment 2]
3 and 4 illustrate the caisson press-fitting method according to the second embodiment of the present invention, and are cross-sectional views in side view for explaining the working situation along each process. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.

（ケーソン圧入工法）
実施の形態２として説明するケーソン圧入工法は、実施の形態１で説明したケーソン圧入装置１００を用いるものであって、以下の工程を有している。
図３の（ａ）において、地盤面９１に外周側コンクリート型枠用足場１１ａを設置し、外周側コンクリート型枠用足場１１ａに外周側コンクリート型枠７ａを取り付ける。また、既に圧入されているケーソン躯体９の内周面に、内周側コンクリート型枠用足場１１ｂを設置して、内周側コンクリート型枠用足場１１ｂに内周側コンクリート型枠７ｂを取り付ける。このとき、外周側コンクリート型枠７ａおよび内周側コンクリート型枠７ｂの一部（下端部から所定の距離の範囲）を、ケーソン躯体９の外周面および内周面の一部（上面から所定の距離の範囲）に押し当て、コンクリート打設部７ｃを形成する（工程１）。
なお、圧入桁２は地盤面９１から初期高さＨの位置にあって、圧入桁２（圧入ジャッキ３およびリフトアップジャッキ４を含む）の重量は、リフトアップジャッキ４が係止している支持部材６を介してケーソン躯体９に伝わっている。また、ケーソン躯体９によって囲まれた範囲は、掘削底面９２まで、掘削（当該範囲の地盤が撤去）されている。 (Caisson press fitting method)
The caisson press-fitting method described as the second embodiment uses the caisson press-fitting device 100 described in the first embodiment and includes the following steps.
In FIG. 3A, the outer peripheral side concrete formwork scaffold 11a is installed on the ground surface 91, and the outer peripheral side concrete formwork 7a is attached to the outer peripheral side concrete formwork scaffold 11a. Moreover, the inner periphery side concrete formwork scaffold 11b is installed in the inner peripheral surface of the caisson housing 9 already press-fitted, and the inner periphery side concrete formwork 7b is attached to the inner periphery side concrete formwork scaffold 11b. At this time, a part (range of a predetermined distance from the lower end portion) of the outer peripheral side concrete mold 7a and the inner peripheral side concrete mold 7b is changed to a part of the outer peripheral surface and inner peripheral surface of the caisson housing 9 (predetermined from the upper surface). The concrete placement portion 7c is formed by pressing against the distance range (step 1).
The press-fitting girder 2 is located at an initial height H from the ground surface 91, and the weight of the press-fitting girder 2 (including the press-fitting jack 3 and the lift-up jack 4) is supported by the lift-up jack 4. It is transmitted to the caisson housing 9 via the member 6. Further, the range surrounded by the caisson housing 9 is excavated (the ground in the range is removed) up to the excavation bottom surface 92.

図３の（ｂ）において、コンクリート打設部７ｃにコンクリート８を打設する（工程２）。このとき、支持部材６の下寄りの範囲はコンクリート８に埋め込まれ、支持部材６の上寄りの範囲は、コンクリート８の上面から上方に突出している。なお、コンクリート８を打設する前に、コンクリート打設部７ｃに所定の鉄筋（図示しない）を配設しておく。 In FIG. 3B, concrete 8 is placed in the concrete placing portion 7c (step 2). At this time, the lower range of the support member 6 is embedded in the concrete 8, and the upper range of the support member 6 protrudes upward from the upper surface of the concrete 8. In addition, before placing the concrete 8, a predetermined reinforcing bar (not shown) is disposed in the concrete placing portion 7c.

図３の（ｃ）において、打設されたコンクリート８が養生し固化して、ケーソン躯体９と一体化したところで、固化したコンクリート８および既に圧入されているケーソン躯体９の側面から外周側コンクリート型枠７ａおよび内周側コンクリート型枠７ｂを引き離す（工程３）。そして、外周側コンクリート型枠用足場１１ａおよび内周側コンクリート型枠用足場１１ｂを撤去する。
なお、以下の説明の便宜上、固化したコンクリート８と既に圧入されているケーソン躯体９とが継ぎ足され、一体化したものを「ケーソン躯体１０」と称す。
そして、リフトアップジャッキ４と支持部材６との係止を開放して、圧入ジャッキ３を駆動して圧入桁２を下方に移動させることによって、圧入桁２に設置された圧入柱５の下面をケーソン躯体１０の上面に当接する（工程４）。このとき、圧入桁２は、圧入柱５の下面とケーソン躯体１０の上面との間隔Ａだけ、初期高さＨから下降している。 In FIG. 3 (c), when the cast concrete 8 is cured and solidified and integrated with the caisson housing 9, the solid concrete 8 and the caulson housing 9 that has already been press-fitted from the side surface are exposed to the outer side concrete type. The frame 7a and the inner peripheral side concrete mold 7b are pulled apart (step 3). And the outer periphery side concrete formwork scaffold 11a and the inner periphery side concrete formwork scaffold 11b are removed.
For the convenience of the following description, the solidified concrete 8 and the caisson housing 9 already press-fitted are joined together and referred to as a “caisson housing 10”.
Then, by releasing the engagement between the lift-up jack 4 and the support member 6 and driving the press-fitting jack 3 to move the press-fitting girder 2 downward, the lower surface of the press-fitting column 5 installed in the press-fitting girder 2 is It contacts the upper surface of the caisson housing 10 (step 4). At this time, the press-fitting girder 2 is lowered from the initial height H by a distance A between the lower surface of the press-fitting column 5 and the upper surface of the caisson housing 10.

図４の（ａ）において、さらに圧入ジャッキ３を駆動して圧入桁２を下方に移動させることによって、ケーソン躯体１０を地盤９０に圧入量Ｂだけ圧入する（工程５）。圧入量Ｂは外周側コンクリート型枠７ａおよび内周側コンクリート型枠７ｂの高さより低く、打設されたコンクリート８の高さに同じである。
そして、ケーソン躯体１０によって囲まれた範囲を掘削底面９３の位置まで、掘削機器８０を用いて掘削する（工程６）。このとき、ケーソン躯体１０の内部から、内周側コンクリート型枠７ｂおよび内周側コンクリート型枠用足場１１ｂが撤去されているから、掘削作業が阻害されることはない。 In FIG. 4A, the press-in jack 3 is further driven to move the press-in girder 2 downward, so that the caisson housing 10 is press-fitted into the ground 90 by the press-in amount B (step 5). The press-fit amount B is lower than the height of the outer peripheral side concrete mold 7a and the inner peripheral side concrete mold 7b, and is the same as the height of the placed concrete 8.
Then, the excavation equipment 80 is used to excavate the area surrounded by the caisson housing 10 to the position of the excavation bottom surface 93 (step 6). At this time, since the inner periphery side concrete formwork 7b and the inner periphery side concrete formwork scaffold 11b are removed from the inside of the caisson housing 10, excavation work is not hindered.

図４の（ｂ）において、ケーソン躯体１０によって囲まれた全範囲を圧入後の掘削底面９３の位置にまで掘削したところで、圧入ジャッキ３とジャッキ反力引張材１との係止を開放して、リフトアップジャッキ４を駆動して、支持部材６を下方に移動することによって、圧入桁２を、工程１を開始した際の位置である初期高さＨにまで、上方に移動させる（工程７）。すなわち、圧入桁２は、間隔Ａと圧入量Ｂとを合計したジャッキアップ量Ｃだけ上昇する。
なお、支持部材６の長さが短いときは、工程７を実行する前に、予め支持部材６上部に延長ロッドを継ぎ足しておく。
そして、ケーソン躯体１０をケーソン躯体９と、掘削底面９３を掘削底面９２と、それぞれ読み替えて工程１に戻り、工程１〜工程７を繰り返す。 4B, when the entire range surrounded by the caisson housing 10 is excavated to the position of the excavation bottom surface 93 after the press-fitting, the engagement between the press-fitting jack 3 and the jack reaction force tension member 1 is released. Then, by driving the lift-up jack 4 and moving the support member 6 downward, the press-fitting girder 2 is moved upward to the initial height H that is the position at the time of starting the step 1 (step 7). ). That is, the press-fitting girder 2 rises by a jack-up amount C that is a sum of the interval A and the press-fitting amount B.
When the length of the support member 6 is short, an extension rod is added to the upper part of the support member 6 in advance before performing step 7.
Then, the caisson housing 10 is replaced with the caisson housing 9 and the excavation bottom surface 93 is replaced with the excavation bottom surface 92, respectively, and the process returns to step 1 and steps 1 to 7 are repeated.

なお、以上は、圧入柱５が圧入桁２に設置されていたが、本発明はこれに限定するものではなく、圧入柱５を圧入桁２に設置しないで、工程３の後に、圧入柱５を圧入桁２とケーソン躯体１０の上面との間に配置し、工程５の後で、圧入柱５を圧入桁２とケーソン躯体１０の上面との間から撤去するようにしてもよい。 Although the press-fitting column 5 is installed in the press-fitting girder 2 in the above, the present invention is not limited to this, and the press-fitting column 5 is not installed in the press-fitting girder 2 after the step 3. May be disposed between the press-fitting girder 2 and the upper surface of the caisson housing 10, and after the step 5, the press-fitting column 5 may be removed from between the press-fitting girder 2 and the upper surface of the caisson housing 10.

以上のように、本発明のケーソン圧入工法によると、ケーソン圧入装置１００を用いることによって、一旦、圧入ジャッキ３がジャッキ反力引張材１に係止可能な状態で、支持部材６に係止するリフトアップジャッキ４によって、圧入桁２が自由落下（下降）不能に配置された後は、ケーソン躯体１０を圧入する毎に、圧入桁２を持ち上げるために外部のクレーンを用意したり、あるいは専用の圧入桁昇降装置（ケーソン躯体９の周囲に配置される）を設置したりすることが不要になる。このため、作業が簡素になることによって、施工工期の短縮化や施工コストの低廉化を図ることができる。 As described above, according to the caisson press-fitting method of the present invention, by using the caisson press-fitting device 100, the press-fitting jack 3 is once locked to the support member 6 in a state in which it can be locked to the jack reaction force tension material 1. After the press-in girder 2 is arranged so that it cannot be freely dropped (lowered) by the lift-up jack 4, every time the caisson housing 10 is press-fitted, an external crane is prepared to lift the press-in girder 2 or a dedicated crane It is not necessary to install a press-fitting girder lifting device (arranged around the caisson housing 9). For this reason, by simplifying the work, it is possible to shorten the construction period and reduce the construction cost.

［実施の形態３］
図５および図６は本発明の実施の形態３に係るケーソン圧入装置を説明するものであって、図５はケーソン圧入装置の側面視の断面図、図６の（ａ）および（ｂ）はそれぞれケーソン圧入装置の使用状況を示す平面図である。なお、実施の形態１と同じ部分または相当する部分には同じ符号を付し、一部の説明を省略する。また、各部は模式的に示すものであって、本発明は図示された形態（形状や数量等）に限定されるものではない。また、以下の説明（含む「符号の説明」）において、同じ内容については符号の添え字「ａ、ｂ」や符号の修飾語「外周側、内周側」の記載を省略する場合がある。 [Embodiment 3]
5 and 6 illustrate a caisson press-fitting device according to a third embodiment of the present invention. FIG. 5 is a cross-sectional view of the caisson press-fitting device in a side view, and FIGS. It is a top view which shows the use condition of a caisson press-fit apparatus, respectively. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted. Moreover, each part is shown typically and this invention is not limited to the form (shape, quantity, etc.) illustrated. In addition, in the following description (including “description of the reference sign”), the description of the same contents may be omitted from the suffixes “a, b” of the reference sign and the modifiers “outer peripheral side, inner peripheral side”.

図５および図６において、ケーソン圧入装置２００は、実施の形態１において説明したケーソン圧入装置１００における、地盤面９１に設置される外周側コンクリート型枠用足場１１ａおよびケーソン躯体９の内周面に設置される内周側コンクリート型枠用足場１１ｂに代えて、圧入桁２に外周側コンクリート型枠用足場１３ａおよび内周側コンクリート型枠用足場１３ｂを設置（懸架）したものである。
すなわち、圧入桁２に支持架構１２ａ、１２ｂを設置し、支持架構１２ａ、１２ｂのケーソン躯体９の外周側に外周側コンクリート型枠用足場１３ａが固定され、支持架構１２ａ、１２ｂのケーソン躯体９の内周側に内周側コンクリート型枠用足場１３ｂが固定されている。なお、圧入柱５は圧入桁２に固定されていないが、予め固定したものであってもよい。 5 and 6, the caisson press-fitting device 200 is provided on the outer peripheral side concrete formwork scaffold 11a and the inner peripheral surface of the caisson housing 9 installed on the ground surface 91 in the caisson press-fitting device 100 described in the first embodiment. Instead of the installed inner peripheral concrete form scaffold 11b, an outer peripheral side concrete form scaffold 13a and an inner concrete form scaffold 13b are installed (suspended) in the press-fitting girder 2.
That is, the support frames 12a and 12b are installed on the press-fitting girder 2, and the outer concrete frame scaffold 13a is fixed to the outer peripheral side of the caisson housing 9 of the support frames 12a and 12b. The inner periphery side concrete formwork scaffold 13b is fixed to the inner periphery side. The press-fitting column 5 is not fixed to the press-fitting girder 2, but may be fixed in advance.

そして、外周側コンクリート型枠用足場１３ａには、外周側コンクリート型枠７ａを進退自在に支持する外周側コンクリート型枠進退機構１４ａが設けられ、外周側コンクリート型枠進退機構１４ａに外周側コンクリート型枠７ａが取り付けられている。
同様に、内周側コンクリート型枠用足場１３ｂには、内周側コンクリート型枠７ｂを進退自在に支持する内周側コンクリート型枠進退機構１４ｂが設けられ、内周側コンクリート型枠進退機構１４ｂに内周側コンクリート型枠７ｂが取り付けられている。
さらに、支持架構１２ａ、１２ｂにはそれぞれ、リフトアップジャッキ４ａ、４ｂが設置されている。
なお、支持架構１２ａ、１２ｂは２個所に限定するものではなく、１個所であっても３個所以上であってもよい。また、リフトアップジャッキ４ａ、４ｂは支持架構１２ａ、１２ｂにのみ設置されるものではなく、圧入桁２に直接設置されてもよい。
なお、以下の説明（含む「符号の説明」）において、同じ内容については符号の添え字「ａ、ｂ」や符号の修飾語「外周側、内周側」の記載を省略する場合がある。 The outer concrete platform scaffold 13a is provided with an outer concrete mold advancing / retreating mechanism 14a that supports the outer concrete mold 7a so as to be able to advance and retreat. The outer concrete mold advancing / retreating mechanism 14a includes an outer concrete mold. A frame 7a is attached.
Similarly, the inner circumference side concrete mold scaffold 13b is provided with an inner circumference side concrete mold advance / retreat mechanism 14b that supports the inner circumference side concrete mold 7b so as to advance and retreat, and the inner circumference side concrete mold advance / retreat mechanism 14b. The inner periphery side concrete formwork 7b is attached.
Furthermore, lift-up jacks 4a and 4b are installed on the support frames 12a and 12b, respectively.
The support frames 12a and 12b are not limited to two places, and may be one place or three or more places. Further, the lift-up jacks 4a and 4b are not installed only on the support frames 12a and 12b, but may be installed directly on the press-fitting girder 2.
In the following description (including “description of reference”), the description of the same contents may be omitted from the suffixes “a, b” of the reference and the modifier “outer side, inner side”.

したがって、後記するように（実施の形態４参照）、コンクリート型枠７によってコンクリート打設部７ｃを形成するタイミング毎（ケーソン躯体１０を圧入するタイミング毎）に、コンクリート型枠用足場１３を設置することが不要になるから、コンクリート型枠用足場１３を設置や撤去するコストが不要になる。
特に、掘削底面９３の位置が深くなった場合、実施の形態１の内周側コンクリート型枠用足場１１ｂは、掘削底面９２からの距離が増加し、掘削底面９２から高く上がった位置に設置することになり、設置に技能と時間を要していたが、実施の形態３のケーソン圧入装置２００で、この点が解消される。 Therefore, as will be described later (see Embodiment 4), the concrete formwork scaffold 13 is installed every time the concrete placement part 7c is formed by the concrete formwork 7 (every time the caisson housing 10 is press-fitted). This eliminates the need to install or remove the concrete formwork scaffold 13.
In particular, when the position of the excavation bottom surface 93 becomes deep, the inner periphery side concrete formwork scaffold 11b of the first embodiment is installed at a position where the distance from the excavation bottom surface 92 increases and the excavation bottom surface 92 rises. As a result, skill and time are required for installation, but this point is eliminated by the caisson press-fitting device 200 of the third embodiment.

さらに、コンクリート型枠進退機構１４を具備しているから、コンクリート打設部７ｃの形成作業やコンクリート型枠７のケーソン躯体１０からの引き離し作業が容易になり、施工コストが安価になる。
なお、以上は、コンクリート型枠進退機構１４として、コンクリート型枠７を進退させるコンクリート型枠進退機構１４を示しているが、本発明はこれに限定するものではなく、コンクリート型枠７を進退させる機構と共に、コンクリート型枠７を昇降させる機構を具備してもよい。このとき、コンクリート型枠７を比較的高さの低いものにして、打設したコンクリートが固化したところで、コンクリート型枠７を上方に移動して、固化したコンクリートの上に、コンクリートを打設する作用を繰り返すようにしてもよい（所謂、スライド型枠に同じ）。 Furthermore, since the concrete formwork advancing / retreating mechanism 14 is provided, the work for forming the concrete placing portion 7c and the work for pulling the concrete formwork 7 away from the caisson housing 10 are facilitated, and the construction cost is reduced.
In the above, the concrete mold advance / retreat mechanism 14 for advancing / retreating the concrete mold 7 is shown as the concrete mold advance / retreat mechanism 14. However, the present invention is not limited to this, and the concrete mold advance / retreat mechanism 14 is advanced / retreated. You may comprise the mechanism which raises / lowers the concrete formwork 7 with a mechanism. At this time, the concrete form 7 is made relatively low, and when the placed concrete is solidified, the concrete form 7 is moved upward and the concrete is placed on the solidified concrete. The action may be repeated (same as the so-called slide mold).

［実施の形態４］
図７〜図８は本発明の実施の形態４に係るケーソン圧入工法を説明するものであって、各工程に沿って作業状況を説明する側面視の断面図である。なお、実施の形態３と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。
実施の形態４として説明するケーソン圧入工法は、実施の形態３で説明したケーソン圧入装置２００を用いるものであって、以下の工程を有している。なお、実施の形態２における工程に対応する工程については、工程番号の一の位を実施の形態２における工程番号と同じにし、工程番号の十の位を「１」にする。 [Embodiment 4]
FIGS. 7 to 8 are for explaining the caisson press-fitting method according to the fourth embodiment of the present invention, and are sectional views in side view for explaining the work situation along each process. The same parts as those in the third embodiment are denoted by the same reference numerals, and a part of the description is omitted.
The caisson press-fitting method described as the fourth embodiment uses the caisson press-fitting device 200 described in the third embodiment and includes the following steps. For the steps corresponding to the steps in the second embodiment, the first place of the process number is the same as the step number in the second embodiment, and the tenth place of the step number is “1”.

図７の（ａ）において、既に圧入されているケーソン躯体９の側面に連続して、ケーソン躯体９の上部にコンクリート型枠７の下部を押し当て、コンクリート打設部７ｃを形成する（工程１１）。すなわち、コンクリート型枠進退機構１４を駆動してコンクリート型枠７を進出させる。
なお、圧入桁２（圧入ジャッキ３、リフトアップジャッキ４、コンクリート型枠７、支持架構１２、コンクリート型枠用足場１３、およびコンクリート型枠進退機構１４を含む）の重量は、リフトアップジャッキ４が係止している支持部材６を介してケーソン躯体９に伝わっている。また、ケーソン躯体９によって囲まれた範囲は、掘削底面９２まで、掘削（当該範囲の地盤が撤去）されている。 In FIG. 7A, the lower part of the concrete mold 7 is pressed against the upper part of the caisson housing 9 continuously to the side surface of the caisson housing 9 already press-fitted to form a concrete placing portion 7c (step 11). ). That is, the concrete formwork advance / retreat mechanism 14 is driven to advance the concrete formwork 7.
The weight of the press-in girder 2 (including the press-in jack 3, the lift-up jack 4, the concrete mold 7, the support frame 12, the concrete mold scaffold 13 and the concrete mold advance / retreat mechanism 14) It is transmitted to the caisson housing 9 through the supporting member 6 that is locked. Further, the range surrounded by the caisson housing 9 is excavated (the ground in the range is removed) up to the excavation bottom surface 92.

図７の（ｂ）において、コンクリート型枠７によって囲まれたコンクリート打設部７ｃにコンクリート８を打設する（工程１２）。このとき、コンクリート８の上面から支持部材６は上方に突出している。なお、コンクリート８を打設する前に、コンクリート打設部７ｃに所定の鉄筋（図示しない）を配設しておく。 In FIG. 7B, concrete 8 is placed in the concrete placement portion 7c surrounded by the concrete mold 7 (step 12). At this time, the support member 6 protrudes upward from the upper surface of the concrete 8. In addition, before placing the concrete 8, a predetermined reinforcing bar (not shown) is disposed in the concrete placing portion 7c.

図７の（ｃ）において、打設されたコンクリート８が養生し固化して、ケーソン躯体９と一体化したところで、コンクリート型枠進退機構１４を駆動してコンクリート型枠７を後退させ、ケーソン躯体１０（固化したコンクリート８と既に圧入されているケーソン躯体９とが一体化したもの）の側面からコンクリート型枠７を引き離す（工程１３）。
このとき、コンクリート型枠用足場１３は圧入桁２に設置されたままである。そして、圧入桁２とケーソン躯体１０の上面との間に圧入柱５を配置する（工程１４）。 In FIG. 7 (c), when the placed concrete 8 is cured and solidified and integrated with the caisson housing 9, the concrete form advancing / retreating mechanism 14 is driven to retract the concrete form 7, and the caisson housing is retreated. The concrete mold 7 is pulled away from the side surface 10 (integrated of the solidified concrete 8 and the caisson housing 9 already press-fitted) (step 13).
At this time, the concrete formwork scaffold 13 remains installed in the press-fitting girder 2. Then, the press-fitting column 5 is disposed between the press-fitting girder 2 and the upper surface of the caisson housing 10 (step 14).

図８の（ａ）において、リフトアップジャッキ４と支持部材６との係止を開放して、圧入ジャッキ３を駆動して圧入桁２を下方に移動させることによって、圧入柱５を介してケーソン躯体１０を地盤９０に圧入する（工程１５）。すなわち、ケーソン躯体１０の上面に載置された圧入柱５の上面とを圧入桁２の下面と間隔Ａ（図示しない）と、圧入量Ｂとを合計した下降量Ｃ（ジャッキアップ量に同じ）だけ、圧入桁２は下降する。そして、圧入されたケーソン躯体１０に囲まれた範囲を掘削底面９３の位置まで、掘削機器８０を用いて掘削する（工程１６）。 In FIG. 8 (a), the lockup between the lift-up jack 4 and the support member 6 is released, and the press-fitting jack 3 is driven to move the press-fitting girder 2 downward. The frame 10 is press-fitted into the ground 90 (step 15). That is, the lowering amount C (same as the jack-up amount), which is the sum of the upper surface of the press-fitting column 5 placed on the upper surface of the caisson housing 10 with the lower surface of the press-fitting girder 2 and the interval A (not shown) and the press-fitting amount B. Only the press-fitting girder 2 is lowered. Then, the excavation equipment 80 is used to excavate the range surrounded by the caisson housing 10 that has been press-fitted to the position of the excavation bottom surface 93 (step 16).

図８の（ｂ）において、ケーソン躯体１０によって囲まれた全範囲を掘削底面９３の位置にまで掘削したところで、圧入ジャッキ３とジャッキ反力引張材１との係止を開放して、リフトアップジャッキ４を駆動して、支持部材６を下方に移動することによって、圧入桁２を上方に少し移動させる。このとき、支持部材６の長さが短いときは、予め上部に延長ロッドを継ぎ足しておく。そして、少し上昇したところで、圧入柱５を圧入桁２とケーソン躯体１０の上面との間から撤去する（工程１７）。 8B, when the entire range surrounded by the caisson housing 10 is excavated to the position of the excavation bottom surface 93, the engagement between the press-in jack 3 and the jack reaction force tension material 1 is released, and the lift is increased. By driving the jack 4 and moving the support member 6 downward, the press-fitting girder 2 is slightly moved upward. At this time, when the length of the support member 6 is short, an extension rod is added to the upper portion in advance. And when it raises a little, the press-fitting pillar 5 is removed from between the press-fitting girder 2 and the upper surface of the caisson housing 10 (process 17).

図８の（ｃ）において、支持部材６をさらに下方に移動して、圧入桁２を初期高さＨの位置にまで上方に移動させる（工程１８）。
そして、ケーソン躯体１０をケーソン躯体９と、掘削底面９３を掘削底面９２と、それぞれ読み替えて工程１に戻り、工程１１〜工程１８を繰り返す。 In FIG. 8C, the support member 6 is further moved downward, and the press-fitting girder 2 is moved upward to the position of the initial height H (step 18).
Then, the caisson housing 10 is replaced with the caisson housing 9 and the excavation bottom surface 93 is replaced with the excavation bottom surface 92, respectively, and the process returns to step 1 and steps 11 to 18 are repeated.

なお、以上は、圧入柱５が圧入桁２とは別個に用意されたものであるが、本発明はこれに限定するものではなく、圧入柱５を圧入桁２に設置してもよい。このとき、工程１４および工程１７は不要になる。また、支持部材６の上部に延長ロッドを継ぎ足すタイミングは、工程１８の直前に限定するものではなく、何れの工程の前であってもよいし、支持部材６の長さが十分に長い場合は、延長ロッドの継ぎ足しを省略してもよい。 In the above, the press-fitting column 5 is prepared separately from the press-fitting girder 2, but the present invention is not limited to this, and the press-fitting column 5 may be installed in the press-fitting girder 2. At this time, Step 14 and Step 17 become unnecessary. Further, the timing of adding the extension rod to the upper part of the support member 6 is not limited to immediately before the step 18, and may be before any step, and when the length of the support member 6 is sufficiently long The omission of the extension rod may be omitted.

以上のように、本発明のケーソン圧入工法によると、実施の形態２で説明したケーソン圧入工法における作用効果と同じ作用効果が得られると共に、コンクリート型枠進退機構１４を備えたコンクリート型枠用足場１３が圧入桁２に設置されているから、コンクリート型枠７によってコンクリート打設部７ｃを形成するタイミング毎（ケーソン躯体１０を圧入するタイミング毎）に、コンクリート型枠用足場１３を設置することが不要になるから、コンクリート型枠用足場１３の製造コストが安価になると共に、施工工期が短縮され、施工コストが安価になる。
特に、掘削底面９３の位置が深くなった場合、実施の形態２の内周側コンクリート型枠用足場１１ｂは、掘削底面９２から離れた高い位置に設置することになり、設置に技能と時間を要していたが、実施の形態４のケーソン圧入工法で、この点が解消される。
さらに、コンクリート型枠進退機構１４を具備しているから、コンクリート打設部７ｃの形成作業やコンクリート型枠７のケーソン躯体１０からの引き離し作業が容易になり、施工コストが安価になる。 As described above, according to the caisson press-fitting method of the present invention, the same effect as that of the caisson press-fitting method described in the second embodiment can be obtained, and the concrete formwork scaffold provided with the concrete form advancing / retreating mechanism 14 Since 13 is installed in the press-fitting girder 2, the concrete formwork scaffold 13 can be installed every time when the concrete placing part 7 c is formed by the concrete formwork 7 (every time when the caisson housing 10 is press-fitted). Since it becomes unnecessary, the manufacturing cost of the concrete formwork scaffold 13 is reduced, the construction period is shortened, and the construction cost is reduced.
In particular, when the position of the excavation bottom surface 93 becomes deep, the inner periphery side concrete formwork scaffold 11b of the second embodiment is installed at a high position away from the excavation bottom surface 92, and it takes skill and time for installation. In short, the caisson press-fitting method of the fourth embodiment eliminates this point.
Furthermore, since the concrete formwork advancing / retreating mechanism 14 is provided, the work for forming the concrete placing portion 7c and the work for pulling the concrete formwork 7 away from the caisson housing 10 are facilitated, and the construction cost is reduced.

［実施の形態５］
図９および図１０は本発明の実施の形態５に係るケーソン圧入装置を説明するものであって、図９は全体を示す側面視の断面図、図１０は一部（ロッドずれ止め）を抜き出して示す斜視図である。なお、実施の形態３と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。また、以下の説明（含む「符号の説明」）において、同じ内容については符号の添え字「ａ、ｂ」や符号の修飾語「外周側、内周側」の記載を省略する場合がある。
図９において、ケーソン圧入装置３００は、実施の形態３において説明したケーソン圧入装置２００において、ケーソン躯体１０に下寄りの範囲が埋め込まれていた支持部材６を、ケーソン躯体１０から撤去したもの（抜き去ったもの）である。 [Embodiment 5]
9 and 10 illustrate a caisson press-fitting device according to a fifth embodiment of the present invention. FIG. 9 is a side sectional view showing the whole, and FIG. 10 is a part (rod slip stopper) extracted. FIG. The same parts as those in the third embodiment are denoted by the same reference numerals, and a part of the description is omitted. In addition, in the following description (including “description of the reference sign”), the description of the same contents may be omitted from the suffixes “a, b” of the reference sign and the modifiers “outer peripheral side, inner peripheral side”.
In FIG. 9, the caisson press-fitting device 300 is the same as the caisson press-fitting device 200 described in the third embodiment, except that the support member 6 in which the lower range is embedded in the caisson housing 10 is removed from the caisson housing 10 (extraction). Left).

すなわち、支持部材６は、リフトアップジャッキ４によって昇降自在かつ自由落下不能に保持され、支持部材６が下降された際に限って、支持部材６の下面がケーソン躯体１０の上面に当接するようにしたものである。
また、圧入柱５ｂが圧入桁２に固定されている。なお、圧入桁２に固定された圧入柱５の数量は限定するものではなく、２本以上であってもよい。また、実施の形態３に準じて、圧入柱５ｂが圧入桁２に固定されないものであってもよい。 That is, the support member 6 is held by the lift-up jack 4 so that it can be raised and lowered and cannot be freely dropped, and the lower surface of the support member 6 is brought into contact with the upper surface of the caisson housing 10 only when the support member 6 is lowered. It is a thing.
Further, the press-fitting pillar 5 b is fixed to the press-fitting girder 2. The number of press-fitting pillars 5 fixed to the press-fitting girder 2 is not limited, and may be two or more. Further, according to the third embodiment, the press-fitting column 5b may not be fixed to the press-fitting girder 2.

したがって、ケーソン圧入装置３００は、実施の形態３のケーソン圧入装置２００と同様の作用効果を奏した上で、後記するように（実施の形態６参照）、支持部材６を継ぎ足す必要がないことから、支持部材６のコストの低減と、支持部材６を継ぎ足す作業のコストの低減を図ることができる。よって、ケーソン圧入装置３００は製造コストを安価に抑えることができる。 Therefore, the caisson press-fitting device 300 has the same effect as the caisson press-fitting device 200 of the third embodiment and, as will be described later (see the sixth embodiment), it is not necessary to add the support member 6. Therefore, the cost of the support member 6 can be reduced, and the cost of the work of adding the support member 6 can be reduced. Therefore, the caisson press-fitting device 300 can keep the manufacturing cost low.

図１０において、ロッドずれ止め２０は、支持部材６の下面をケーソン躯体１０の上面に当接する際、支持部材６の下面が移動することを防止するためのものであるが、ケーソン圧入装置３００は、ロッドずれ止め２０を具備しないものであってもよい（実施の形態６参照）。
すなわち、ロッドずれ止め２０は、ずれ止め基板２１と、ずれ止め基板２１の中央に固定されたずれ止め円筒２２と、ずれ止め基板２１をケーソン躯体１０の上面に固定するための固定手段（例えば、ボルト）が貫通するずれ止め孔２３とを具備している。
そして、支持部材６が円筒状である場合、ずれ止め円筒２２の内周に支持部材６が侵入したり、あるいは、支持部材６の内周にずれ止め円筒２２が侵入したりする。また、支持部材６が中実の円柱状である場合、ずれ止め円筒２２の内周に支持部材６が侵入する。なお、支持部材６が円筒状や円柱状でない場合には、支持部材６の形状に対応してずれ止め円筒２２の形状は、円筒状でない形状に変更されるものである。 In FIG. 10, the rod slip stopper 20 is for preventing the lower surface of the support member 6 from moving when the lower surface of the support member 6 contacts the upper surface of the caisson housing 10. The rod detent 20 may not be provided (see Embodiment 6).
That is, the rod stopper 20 includes a stopper substrate 21, a stopper cylinder 22 fixed to the center of the stopper substrate 21, and fixing means for fixing the stopper substrate 21 to the upper surface of the caisson housing 10 (for example, And a stopper hole 23 through which the bolt) penetrates.
When the support member 6 is cylindrical, the support member 6 enters the inner periphery of the stopper cylinder 22 or the stopper cylinder 22 enters the inner periphery of the support member 6. Further, when the support member 6 has a solid columnar shape, the support member 6 enters the inner periphery of the slip prevention cylinder 22. When the support member 6 is not cylindrical or columnar, the shape of the displacement prevention cylinder 22 is changed to a non-cylindrical shape corresponding to the shape of the support member 6.

［実施の形態６］
図１１および図１２は本発明の実施の形態６に係るケーソン圧入工法を説明するものであって、各工程に沿って作業状況を説明する側面視の断面図である。なお、実施の形態５と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。
実施の形態６として説明するケーソン圧入工法は、実施の形態５で説明したケーソン圧入装置３００を用いるものであって、以下の工程を有している。なお、実施の形態４における工程に対応する工程については、工程番号の一の位を実施の形態４における工程番号の一の位と同じにし、工程番号の十の位を「２」にする。 [Embodiment 6]
FIGS. 11 and 12 illustrate the caisson press-fitting method according to the sixth embodiment of the present invention, and are cross-sectional views in side view for explaining the working situation along each process. The same parts as those in the fifth embodiment are denoted by the same reference numerals, and a part of the description is omitted.
The caisson press-fitting method described as the sixth embodiment uses the caisson press-fitting device 300 described in the fifth embodiment and includes the following steps. Note that for the process corresponding to the process in the fourth embodiment, the first place of the process number is the same as the first place of the process number in the fourth embodiment, and the tenth place of the process number is “2”.

図１１の（ａ）において、既に圧入されているケーソン躯体９の側面に連続して、ケーソン躯体９の上部にコンクリート型枠７の下部を押し当て、コンクリート打設部７ｃを形成する（工程２１）。すなわち、コンクリート型枠進退機構１４を駆動してコンクリート型枠７を進出させ、コンクリート型枠７がケーソン躯体９の上部を把持するようにした後、支持部材６は上方に移動して、支持部材６の下面がコンクリート打設部７ｃの上に位置するようにする。
このとき、支持部材６の下面はケーソン躯体９の上面から離れているものの、圧入桁２（圧入ジャッキ３、リフトアップジャッキ４、コンクリート型枠７、支持架構１２、コンクリート型枠用足場１３、およびコンクリート型枠進退機構１４を含む）の重量は、支持架構１２、コンクリート型枠用足場１３およびコンクリート型枠進退機構１４を経由して、コンクリート型枠７とケーソン躯体９の上部との間の摩擦力として、ケーソン躯体９に伝わっている。また、ケーソン躯体９によって囲まれた範囲は、掘削底面９２まで、掘削（当該範囲の地盤が撤去）されている。 In FIG. 11A, the lower part of the concrete mold 7 is pressed against the upper part of the caisson housing 9 continuously to the side surface of the caisson housing 9 already press-fitted to form the concrete placing portion 7c (step 21). ). That is, after the concrete formwork advancing / retreating mechanism 14 is driven to advance the concrete formwork 7 so that the concrete formwork 7 grips the upper part of the caisson housing 9, the support member 6 moves upward and the support member 6 moves upward. The lower surface of 6 is positioned on the concrete placing part 7c.
At this time, although the lower surface of the support member 6 is separated from the upper surface of the caisson housing 9, the press-fitting girder 2 (the press-in jack 3, the lift-up jack 4, the concrete mold 7, the support frame 12, the concrete mold scaffold 13, and The weight of the concrete formwork advancing / retracting mechanism 14) is the friction between the concrete formwork 7 and the upper part of the caisson housing 9 via the support frame 12, the concrete formwork scaffold 13 and the concrete formwork advancing / retreating mechanism 14. It is transmitted to the caisson housing 9 as a force. Further, the range surrounded by the caisson housing 9 is excavated (the ground in the range is removed) up to the excavation bottom surface 92.

図１１の（ｂ）において、コンクリート型枠７によって囲まれたコンクリート打設部７ｃにコンクリート８を打設する（工程２２）。このとき、支持部材６はリフトアップジャッキ４によって自由落下不能に保持され、支持部材６の下面はコンクリート８の上面から離れている。なお、コンクリート８を打設する前に、コンクリート打設部７ｃに所定の鉄筋（図示しない）を配設しておく。 In FIG. 11 (b), the concrete 8 is placed in the concrete placement portion 7c surrounded by the concrete mold 7 (step 22). At this time, the support member 6 is held by the lift-up jack 4 so that it cannot freely fall, and the lower surface of the support member 6 is separated from the upper surface of the concrete 8. In addition, before placing the concrete 8, a predetermined reinforcing bar (not shown) is disposed in the concrete placing portion 7c.

図１１の（ｃ）において、打設されたコンクリート８が養生し固化して、ケーソン躯体９と一体化したところで、コンクリート型枠進退機構１４を駆動してコンクリート型枠７を後退させ、ケーソン躯体１０（固化したコンクリート８と既に圧入されているケーソン躯体９とが一体化したもの）の側面からコンクリート型枠７を引き離す（工程２３）。このとき、コンクリート型枠用足場１３は圧入桁２に設置されたままであり、圧入桁２に固定された圧入柱５ｂは、ケーソン躯体１０の直上に位置している。 In FIG. 11 (c), when the placed concrete 8 is cured and solidified and integrated with the caisson housing 9, the concrete form advancing / retreating mechanism 14 is driven to retract the concrete form 7, so that the caisson housing The concrete mold 7 is pulled away from the side surface 10 (integrated of the solidified concrete 8 and the caisson housing 9 already press-fitted) (step 23). At this time, the concrete formwork scaffold 13 is still installed in the press-fitting girder 2, and the press-fitting column 5 b fixed to the press-fitting girder 2 is located immediately above the caisson housing 10.

図１２の（ａ）において、リフトアップジャッキ４と支持部材６との係止を開放して、圧入ジャッキ３を駆動して圧入桁２を下方に移動させることによって、圧入柱５を介してケーソン躯体１０を地盤９０に圧入する（工程２５）。このとき、圧入桁２は、圧入柱５ｂの下面とケーソン躯体１０の上面との間隔Ａ（図示しない）と、圧入量Ｂとを合計した下降量Ｃ（ジャッキアップ量Ｃに同じ）だけ下降する。
そして、圧入されたケーソン躯体１０に囲まれた範囲を掘削底面９３の位置まで、掘削機器８０を用いて掘削する（工程２６）。 In FIG. 12 (a), the lockup between the lift-up jack 4 and the support member 6 is released, and the press-fitting jack 3 is driven to move the press-fitting girder 2 downward. The frame 10 is press-fitted into the ground 90 (step 25). At this time, the press-fitting girder 2 is lowered by a descending amount C (same as the jack-up amount C), which is the sum of the distance A (not shown) between the lower surface of the press-fitting column 5b and the upper surface of the caisson housing 10 and the press-fitting amount B. .
Then, the excavation equipment 80 is used to excavate the area surrounded by the caisson housing 10 that has been press-fitted to the position of the excavation bottom surface 93 (step 26).

図１２の（ｂ）において、ケーソン躯体１０によって囲まれた全範囲を掘削底面９３の位置にまで掘削したところで、リフトアップジャッキ４を駆動して、支持部材６を下方に移動し、支持部材６の下面をケーソン躯体１０の上面に押し当てる（工程２８）。このとき、支持部材６の下端部を保持するロッドずれ止め２０（図１０参照）をケーソン躯体１０の上面に設置してもよい。また、圧入ジャッキ３とジャッキ反力引張材１は係止したままで、圧入桁２の自由落下（下降）を防止している。 In FIG. 12B, when the entire range surrounded by the caisson housing 10 has been excavated to the position of the excavation bottom surface 93, the lift-up jack 4 is driven to move the support member 6 downward, and the support member 6 Is pressed against the upper surface of the caisson housing 10 (step 28). At this time, a rod slip stopper 20 (see FIG. 10) that holds the lower end of the support member 6 may be installed on the upper surface of the caisson housing 10. Further, the press-fitting jack 3 and the jack reaction force tension member 1 remain locked, and the press-fitting girder 2 is prevented from free fall (down).

図１２の（ｃ）において、圧入ジャッキ３とジャッキ反力引張材１との係止を開放して、リフトアップジャッキ４を駆動して、支持部材６を下方に移動することによって、圧入桁２を上方に移動させる。すなわち、支持部材６の下面をケーソン躯体１０の上面に押し当て、支持部材６を下方に移動して、圧入桁２をジャッキアップ量（下降量に同じ）Ｃだけ持ち上げて、初期高さＨの位置にまで上方に移動させる（工程２９）。
そして、ケーソン躯体１０をケーソン躯体９と、掘削底面９３を掘削底面９２と、それぞれ読み替えて工程２１に戻り、工程２１〜工程２９を繰り返す。
なお、ロッドずれ止め２０を設置した場合、工程２１において支持部材６を上方に移動したところで、ロッドずれ止め２０を撤去する。 In FIG. 12C, the press-fitting girder 2 is released by releasing the locking of the press-fitting jack 3 and the jack reaction force tension member 1 and driving the lift-up jack 4 to move the support member 6 downward. Is moved upward. That is, the lower surface of the support member 6 is pressed against the upper surface of the caisson housing 10, the support member 6 is moved downward, and the press-fitting girder 2 is lifted by a jack-up amount (same as the descending amount) C, Move upward to the position (step 29).
Then, the caisson housing 10 is replaced with the caisson housing 9 and the excavation bottom surface 93 is replaced with the excavation bottom surface 92, respectively, and the process returns to the step 21, and the steps 21 to 29 are repeated.
When the rod stopper 20 is installed, the rod stopper 20 is removed when the support member 6 is moved upward in step 21.

なお、以上は、圧入柱５および支持部材６が圧入桁２に昇降自在（自由落下不能）に支持され、支持部材６は下降したときに、その下面がケーソン躯体１０の上面に押し当てられるものであるから、支持部材６の上部に延長ロッドを継ぎ足す必要が無い。すなわち、実施の形態４における「圧入柱５を配置する（工程１４）」や、「支持部材６の長さが短いときは、予め上部に延長ロッドを継ぎ足しておき、圧入柱５を撤去する（工程１７）」に対応した工程を具備しない。
また、以上は、圧入柱５が圧入桁２に固定されているため、実施の形態４における圧入柱５を配置する工程１４および圧入柱５を撤去する工程１７に相当する工程は不要になっている。したがって、実施の形態４における効果を奏した上で、施工がさらに迅速になるから、施工工期の短縮と施工コストの低廉化をさらに促進することができる。 In the above, the press-fitting column 5 and the support member 6 are supported by the press-fitting girder 2 so that they can be raised and lowered (cannot freely fall), and the lower surface of the support member 6 is pressed against the upper surface of the caisson housing 10 when lowered. Therefore, it is not necessary to add an extension rod to the upper part of the support member 6. That is, “place the press-fitting column 5 (step 14)” in the fourth embodiment or “when the length of the support member 6 is short, an extension rod is added to the upper portion in advance and the press-fitting column 5 is removed ( Step 17) ”is not provided.
In addition, since the press-fitting column 5 is fixed to the press-fitting girder 2, steps corresponding to the step 14 for arranging the press-fitting column 5 and the step 17 for removing the press-fitting column 5 in the fourth embodiment are unnecessary. Yes. Therefore, since the construction is further quickened while achieving the effects of the fourth embodiment, the construction period can be shortened and the construction cost can be further reduced.

なお、本発明は、支持部材６が圧入桁２に固定されたものに限定するものではなく、支持部材６を圧入桁２とは別個にして、実施の形態４における工程１４および工程１７に相当する工程を有してもよい。
さらに、工程２１において、圧入桁２の重量は、コンクリート型枠７とケーソン躯体９の上部との間の摩擦力としてケーソン躯体９に伝わっているが、本発明はこれに限定するものではなく、前記摩擦力に代わるものとして、あるいは、前記摩擦力と併用するものとして、ジャッキ反力引張材１に係止して圧入桁２の自由落下を防止するストッパー（圧入時は開放自在）を圧入桁２または圧入ジャッキ３に設置してもよい。 The present invention is not limited to the case where the support member 6 is fixed to the press-fitting girder 2, and the support member 6 is separated from the press-fitting girder 2 and corresponds to steps 14 and 17 in the fourth embodiment. You may have the process to do.
Furthermore, in the step 21, the weight of the press-fitting girder 2 is transmitted to the caisson housing 9 as a frictional force between the concrete mold 7 and the upper part of the caisson housing 9, but the present invention is not limited to this. As an alternative to the frictional force, or as a combination with the frictional force, a press-fitting girder is provided with a stopper (can be freely opened when press-fitted) that is locked to the jack reaction force tension material 1 to prevent the press-fitting girder 2 from falling freely. 2 or press-fit jack 3 may be installed.

［実施の形態７］
図１３〜図１７は本発明の実施の形態７に係るケーソン圧入装置を説明するものであって、図１３はケーソン躯体の内側から外側に向かって見た立面図、図１４は中段部を示す平面図、図１５は下段部を示す平面図、図１６は展開した状態を示す側面図、図１７は折り畳んだ状態を示す側面図である。なお、実施の形態３または５と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。
実施の形態７に係るケーソン圧入装置４００は、実施の形態３、５に係るケーソン圧入装置２００、３００における圧入桁２に設置された内周側コンクリート型枠用足場１３ｂに替えて、折り畳み自在なコンクリート型枠用折り畳み足場（以下「折り畳み足場」と称す）４１０を有するものであって、折り畳み足場４１０を除く部位についてはケーソン圧入装置２００、３００に同じであるから、以下、折り畳み足場４１０について説明する。 [Embodiment 7]
FIGS. 13 to 17 illustrate a caisson press-fitting device according to a seventh embodiment of the present invention. FIG. 13 is an elevational view as seen from the inside to the outside of the caisson housing, and FIG. FIG. 15 is a plan view showing the lower stage, FIG. 16 is a side view showing the unfolded state, and FIG. 17 is a side view showing the folded state. In addition, the same code | symbol is attached | subjected to this same part as Embodiment 3 or 5, and a part of description is abbreviate | omitted.
The caisson press-fitting device 400 according to the seventh embodiment can be folded in place of the inner peripheral side concrete form scaffold 13b installed in the press-fitting girder 2 in the caisson press-fitting devices 200, 300 according to the third and fifth embodiments. The folding scaffold 410 for concrete formwork (hereinafter referred to as “folding scaffold”) 410 is provided, and the parts other than the folding scaffold 410 are the same as those of the caisson press-fitting devices 200 and 300. Therefore, the folding scaffold 410 will be described below. To do.

（折り畳み足場）
図１３〜図１７において、圧入桁２に設置された支持架構１２ａ、１２ｂ内の、ケーソン躯体９の内周側に配置されたものの一部をヨーク９００ａ、９００ｂと称している。
そして、ヨーク９００ａ、９００ｂにはそれぞれ取り付け柱９２０ａ、９２０ｂが取り付けられている。また、ヨーク９００ａ、９００ｂのそれぞれに跨がって、腹起こし材９１０ａ、９１０ｂが上下方向で２段設置され、腹起こし材９１０ａ、９１０ｂに取り付け間柱９２０ｃが取り付けられている。
折り畳み足場４１０は、取り付け柱９２０ａ、９２０ｂに取り付けられたリンク機構４２０ａ、４２０ｂ、および取り付け間柱９２０ｃに取り付けられたリンク機構４２０ｃ、を具備している。なお、一部の部材の端面に斜線を付し、側面等との相違を明確にしている。 (Folding scaffold)
13 to 17, some of the support frames 12a and 12b installed on the press-fitting girder 2 and arranged on the inner peripheral side of the caisson housing 9 are referred to as yokes 900a and 900b.
Further, attachment posts 920a and 920b are attached to the yokes 900a and 900b, respectively. Further, over the yokes 900a and 900b, the erection members 910a and 910b are installed in two stages in the vertical direction, and the attachment spacers 920c are attached to the erection members 910a and 910b.
The folding scaffold 410 includes link mechanisms 420a and 420b attached to the attachment pillars 920a and 920b, and a link mechanism 420c attached to the attachment pillar 920c. Note that the end faces of some members are hatched to clarify the difference from the side faces.

（リンク機構）
リンク機構４２０ａ、４２０ｂおよびリンク機構４２０ｃは、それぞれ同様の構造であるから、リンク機構４２０ａについて説明し、リンク機構４２０ｃについては、取り付け柱９２０ａを取り付け間柱９２０ｃと読み替えるものとする。なお、以下の説明（含む「符号の説明」）において、同じ内容については符号の添え字「ａ、ｂ、ｃ」の記載を省略する。
リンク機構４２０は、取り付け柱９２０に対して回動自在に設置された中段骨材１３０および下段骨材１２０と、取り付け柱９２０に対して平行な姿勢を保って移動する共通縦材２３０と、これらの動きを規制するストッパー材３１０と、中段骨材１３０および下段骨材１２０にそれぞれ固定された中段床板１１５および下段床板１２５と、を具備している。 (Link mechanism)
Since the link mechanisms 420a and 420b and the link mechanism 420c have the same structure, only the link mechanism 420a will be described. In the following description (including “description of reference signs”), description of the suffixes “a, b, c” of reference signs is omitted for the same contents.
The link mechanism 420 includes a middle aggregate 130 and a lower aggregate 120 that are rotatably installed with respect to the mounting column 920, a common longitudinal member 230 that moves while maintaining a parallel posture with respect to the mounting column 920, and these And a middle floor plate 115 and a lower floor plate 125 fixed to the middle aggregate 130 and the lower aggregate 120, respectively.

（中段骨材）
中段骨材１３０の一方の端部１３１が、取り付け柱９２０に設置された取り付け腕９３１に回動自在に取り付けられている。取り付け腕９３１はケーソン躯体９の内周側に突出し、取り付け腕９３１の先端部には一対の取り付け板９４１が固定され、取り付け板９４１には、中段取り付けピン９５１が貫通自在な図示しない取り付け孔が形成されている。一方、中段骨材１３０の一方の端部１３１には、中段取り付けピン９５１が貫通自在な図示しない取り付け孔が形成され、端部１３１が一対の取り付け板９４１に挟まれた状態で、中段取り付けピン９５１が両者の取り付け孔を貫通している。すなわち、中段骨材１３０の一方の端部１３１が、取り付け柱９２０に設置された取り付け腕９３１に中段取り付けピン９５１によって回動自在に取り付けられている。
なお、中段骨材１３０の他方の端部１３２には、展開時に下方に突出した（折り畳み時に内周側に突出したに同じ）中段骨突部１３３が設けられ、中段骨突部１３３に中段連結ピン２３１が貫通自在な図示しない貫通孔が形成されている。 (Medium aggregate)
One end 131 of the middle aggregate 130 is rotatably attached to an attachment arm 931 installed on the attachment column 920. The mounting arm 931 protrudes to the inner peripheral side of the caisson housing 9, and a pair of mounting plates 941 are fixed to the tip of the mounting arm 931. The mounting plate 941 has a mounting hole (not shown) through which the middle mounting pin 951 can pass. Is formed. On the other hand, an attachment hole (not shown) through which the intermediate attachment pin 951 can pass is formed in one end 131 of the intermediate aggregate 130, and the intermediate attachment pin is pinched with the end 131 sandwiched between the pair of attachment plates 941. 951 penetrates both attachment holes. That is, one end 131 of the middle aggregate 130 is rotatably attached to the attachment arm 931 installed on the attachment column 920 by the middle attachment pin 951.
The other end portion 132 of the middle-stage aggregate 130 is provided with a middle-stage bone projection 133 that protrudes downward when deployed (the same as that projected to the inner circumference when folded), and is connected to the middle-stage bone projection 133 in the middle stage. A through hole (not shown) through which the pin 231 can pass is formed.

（下段骨材）
また、同様に、下段骨材１２０の一方の端部１２１が、取り付け柱９２０に設置された取り付け腕９３２に回動自在に取り付けられている。取り付け腕９３２はケーソン躯体９の内周側に突出し、取り付け腕９３２の先端部には一対の取り付け板９４２が固定され、取り付け板９４２には、下段取り付けピン９５２が貫通自在な図示しない取り付け孔が形成されている。一方、下段骨材１２０の一方の端部１２１には、下段取り付けピン９５２が貫通自在な図示しない取り付け孔が形成され、端部１２１が一対の取り付け板９４２に挟まれた状態で、下段取り付けピン９５２が両者の取り付け孔を貫通している。すなわち、下段骨材１２０の一方の端部１２１が、取り付け柱９２０に設置された取り付け腕９３２に下段取り付けピン９５２によって回動自在に取り付けられている。
なお、下段骨材１２０の他方の端部１２２には、展開時に下方に突出した（折り畳み時に内周側に突出したに同じ）下段骨突部１２３が設けられ、下段骨突部１２３に下段連結ピン２３２が貫通自在な図示しない貫通孔が形成されている。 (Lower aggregate)
Similarly, one end 121 of the lower aggregate 120 is rotatably attached to an attachment arm 932 installed on the attachment column 920. The mounting arm 932 protrudes to the inner peripheral side of the caisson housing 9, and a pair of mounting plates 942 are fixed to the tip of the mounting arm 932. The mounting plate 942 has a mounting hole (not shown) through which the lower mounting pin 952 can pass. Is formed. On the other hand, one end 121 of the lower aggregate 120 is formed with a mounting hole (not shown) through which the lower mounting pin 952 can pass, and the lower mounting pin 952 is sandwiched between the pair of mounting plates 942. 952 penetrates both attachment holes. That is, one end 121 of the lower aggregate 120 is rotatably attached to the attachment arm 932 installed on the attachment column 920 by the lower attachment pin 952.
The other end 122 of the lower aggregate 120 is provided with a lower bone protrusion 123 that protrudes downward at the time of deployment (same as protruding toward the inner periphery when folded), and is connected to the lower bone protrusion 123 at the lower stage. A through hole (not shown) through which the pin 232 can pass is formed.

（共通縦材）
共通縦材２３０には、中段連結ピン２３１および下段連結ピン２３２が、それぞれ貫通自在な図示しない貫通孔が形成され、共通縦材２３０は、中段骨材１３０および下段骨材１２０に中段連結ピン２３１および下段連結ピン２３２によって回動自在に連結されている。また、中段連結ピン２３１が貫通する貫通孔に近い下方の位置に、ストッパー連結ピン２３３が貫通自在な図示しない貫通孔が形成されている。
さらに、共通縦材２３０には、先端部（上端部）に、吊り上げ手段（これについては別途詳細に説明する）の一部が係止するための吊り上げ用孔２３４が設けられている。
そして、共通縦材２３０には、先端部（上端部）および先端部に近い位置に中段手摺り２３５が水平方向に固定され、下端部に近い位置に下段手摺り２３６が水平方向に固定されている。 (Common vertical members)
The common longitudinal member 230 is formed with through holes (not shown) through which the middle connection pins 231 and the lower connection pins 232 can pass, respectively. And a lower connecting pin 232 that is rotatably connected. A through hole (not shown) through which the stopper connecting pin 233 can pass is formed at a lower position near the through hole through which the middle connecting pin 231 passes.
Further, the common longitudinal member 230 is provided with a lifting hole 234 for locking a part of lifting means (this will be described in detail later) at the tip (upper end).
In the common longitudinal member 230, the middle handrail 235 is fixed in the horizontal direction at a position close to the front end (upper end) and the front end, and the lower handrail 236 is fixed in a horizontal direction near the lower end. Yes.

（ストッパー）
ストッパー材３１０は、外管３１３と、外管３１３の内部に進退自在に配置された内管３１２とから構成され、内管３１２の一方（外管３１３とは反対側）の端部３１１にはストッパー取り付けピン９５３が貫通自在な図示しない貫通孔が形成され、外管３１３の他方（内管３１２とは反対側）の端部３１４には、ストッパー連結ピン２３３が貫通自在な図示しない貫通孔が形成されている。
取り付け柱９２０にケーソン躯体９の内周側に突出した取り付け腕９３３が取り付けられて、その先端部には一対の取り付け板９４３が固定されている。一対の取り付け板９４３は、ストッパー材３１０の一方の端部３１１を挟み、前者に後者がストッパー取り付けピン９５３によって回動自在に取り付けられている。 (stopper)
The stopper material 310 is composed of an outer tube 313 and an inner tube 312 that can be moved forward and backward inside the outer tube 313, and at one end 311 of the inner tube 312 (on the side opposite to the outer tube 313) A through hole (not shown) through which the stopper mounting pin 953 can pass is formed, and a through hole (not shown) through which the stopper connecting pin 233 can pass is formed at the other end (314) of the outer pipe 313 (the side opposite to the inner pipe 312). Is formed.
An attachment arm 933 protruding to the inner peripheral side of the caisson housing 9 is attached to the attachment column 920, and a pair of attachment plates 943 are fixed to the tip portion thereof. The pair of mounting plates 943 sandwich one end portion 311 of the stopper material 310, and the latter is rotatably attached to the former by a stopper mounting pin 953.

また、ストッパー材３１０の他方の端部３１４は、ストッパー連結ピン２３３によって共通縦材２３０に回動自在に連結されている。このとき、ストッパー材３１０の側面（鉛直面）は、共通縦材２３０の側面（鉛直面）に対向している。
そして、ストッパー取り付けピン９５３とストッパー連結ピン２３３との距離は、一定の値よりも短くならないようになっている。
なお、ストッパー材３１０の取り付け位置は限定するものではなく、下段骨材１２０の下方に取り付けてもよく、中段骨材１３０の下方および下段骨材１２０の下方の両方に取り付けてもよい。また、ストッパー材３１０の形態は、図示するものに限定するものではない（これについては別途詳細に説明する）。 Further, the other end 314 of the stopper member 310 is rotatably connected to the common longitudinal member 230 by a stopper connecting pin 233. At this time, the side surface (vertical surface) of the stopper member 310 faces the side surface (vertical surface) of the common longitudinal member 230.
The distance between the stopper mounting pin 953 and the stopper connecting pin 233 is not shorter than a certain value.
The attachment position of the stopper material 310 is not limited, and may be attached below the lower aggregate 120, or may be attached both below the middle aggregate 130 and below the lower aggregate 120. Moreover, the form of the stopper material 310 is not limited to what is illustrated (this will be described in detail separately).

（中段床板、下段床板）
中段床板１１５が中段骨材１３０に固定され、下段床板１２５が下段骨材１２０に固定されている。なお、中段床板１１５は中段骨材１３０ａ、１３０ｂ、１３０ｃの３本の腕材に固定され、下段床板１２５は下段骨材１２０ａ、１２０ｂ、１２０ｃの３本の腕材に固定されているが、本発明はこれに限定するものではなく、固定する腕材の本数は何れであってもよい。
また、中段床板１１５および下段床板１２５の形態はいずれであってもよく、鋼板（アンチスリップ鋼板）、グレーチング、複数の棒材ないし管材を並べた桟等、何れであってもよい。 (Middle and lower floor boards)
The middle floor board 115 is fixed to the middle stage aggregate 130, and the lower stage floor board 125 is fixed to the lower stage aggregate 120. Note that the middle floor plate 115 is fixed to the three arm members of the middle step aggregates 130a, 130b, and 130c, and the lower step floor plate 125 is fixed to the three arm members of the lower step aggregates 120a, 120b, and 120c. The invention is not limited to this, and the number of arm members to be fixed may be any.
Moreover, the form of the middle floor board 115 and the lower floor board 125 may be any, and may be any steel plate (anti-slip steel plate), grating, a bar in which a plurality of bars or pipes are arranged, and the like.

（リンク機構の動き）
以下、説明の便宜上、中段取り付けピン９５１の位置を「Ａ」、中段連結ピン２３１の位置を「Ｅ」、下段連結ピン２３２の位置を「Ｆ」、および下段取り付けピン９５２の位置を「Ｇ」と称し、ストッパー取り付けピン９５３の位置およびストッパー連結ピン２３３の位置をそれぞれ「Ｈ」および「Ｉ」と称す。 (Link mechanism movement)
Hereinafter, for convenience of explanation, the position of the middle mounting pin 951 is “A”, the position of the middle connecting pin 231 is “E”, the position of the lower connecting pin 232 is “F”, and the position of the lower mounting pin 952 is “G”. The positions of the stopper mounting pin 953 and the stopper connecting pin 233 are referred to as “H” and “I”, respectively.

（展開した状態）
図１６に示す展開時において、位置Ａ、位置Ｅ、位置Ｆ、位置Ｇおよび位置Ａを結ぶ線は、平行四辺形を呈し、中段骨材１３０は下段骨材１２０に平行であって、取り付け柱９２０に対して垂直になっている。
また、位置Ａ、位置Ｅ、位置Ｉ、位置Ｈおよび位置Ａを結ぶ線は、平行四辺形でも台形でもない四角形を呈し、位置Ｅと位置Ｉが近接しているため、略三角形を呈している。
そして、ストッパー取り付けピン９５３（位置Ｈ）とストッパー連結ピン２３３（位置Ｉ）との距離は、中段骨材１３０および下段骨材１２０が取り付け柱９２０に対して垂直になったときに、最も短くなるように構成されているから、中段骨材１３０の他方の端部１３２および下段骨材１２０の他方の端部１２２が、それぞれ前者の一方の端部１３１および後者の一方の端部１２１よりも下に倒伏することがない。 (Expanded state)
At the time of deployment shown in FIG. 16, the lines connecting position A, position E, position F, position G, and position A are parallelograms, the middle aggregate 130 is parallel to the lower aggregate 120, and the mounting column It is perpendicular to 920.
Further, the line connecting the position A, the position E, the position I, the position H, and the position A presents a quadrangle that is neither a parallelogram nor a trapezoid, and the position E and the position I are close to each other, so that they are approximately triangular. .
The distance between the stopper mounting pin 953 (position H) and the stopper connecting pin 233 (position I) is the shortest when the middle aggregate 130 and the lower aggregate 120 are perpendicular to the mounting column 920. Therefore, the other end 132 of the middle aggregate 130 and the other end 122 of the lower aggregate 120 are respectively lower than the one end 131 of the former and the one end 121 of the latter. You will never fall asleep.

（折り畳み過程）
共通縦材２３０の吊り上げ用孔２３４に、図示しない吊り上げ手段（例えば、チェインブロック、ウインチ等）の一部を連結して、共通縦材２３０を吊り上げると、ストッパー材３１０は伸ばされ、中段骨材１３０の一方の端部１３１および下段骨材１２０の一方の端部１２１よりも、それぞれ前者の他方の端部１３２および後者の他方の端部１２２が高い位置になるように起立する。このとき、展開時に平行四辺形を呈していた位置Ａ、位置Ｅ、位置Ｆ、位置Ｇおよび位置Ａを結ぶ線は、一旦、長方形を呈した後、平行四辺形を呈する。 (Folding process)
When a part of lifting means (for example, chain block, winch, etc.) (not shown) is connected to the lifting hole 234 of the common longitudinal member 230 and the common longitudinal member 230 is lifted, the stopper member 310 is extended, and the middle stage aggregate The other end portion 132 of the former and the other end portion 122 of the latter stand up higher than the one end portion 131 of the 130 and the one end portion 121 of the lower aggregate 120, respectively. At this time, the lines connecting the positions A, E, F, G, and A, which have taken the parallelogram at the time of development, once show a rectangle, and then show a parallelogram.

（折り畳んだ状態）
図１７において、中段骨材１３０、下段骨材１２０および共通縦材２３０は、取り付け柱９２０に対して平行になり、中段骨材１３０および下段骨材１２０の内周側に共通縦材２３０が位置している。
一方、ストッパー材３１０も取り付け柱９２０に対して平行になり、中段骨材１３０および下段骨材１２０の内周側で、共通縦材２３０に並んでいる。すなわち、位置Ｈと位置Ｉを結ぶ直線は、位置Ｅと位置Ｆを結んだ直線上に位置している。 (Folded)
In FIG. 17, the middle aggregate 130, the lower aggregate 120, and the common longitudinal member 230 are parallel to the mounting column 920, and the common longitudinal member 230 is positioned on the inner peripheral side of the middle aggregate 130 and the lower aggregate 120. doing.
On the other hand, the stopper material 310 is also parallel to the mounting column 920 and is lined up with the common longitudinal material 230 on the inner peripheral side of the middle aggregate 130 and the lower aggregate 120. That is, the straight line connecting the position H and the position I is located on the straight line connecting the position E and the position F.

以上のように、折り畳み足場４１０は、取り付け柱９２０（ヨーク９００に同じ）に近接した状態に折り畳むことができ、内周側に突出しないため、ケーソン躯体１０によって囲まれた範囲を掘削底面９３の位置まで、掘削機器８０を用いて掘削する際、特にケーソン躯体９に近い範囲においても、掘削作業が阻害されることはない（図２２参照）。
なお、以上は、折り畳み足場４１０として、取り付け柱９２０ａ、９２０ｂに取り付けられたリンク機構４２０ａ、４２０ｂと、取り付け間柱９２０ｃに取り付けられたリンク機構４２０ｃとを具備する折り畳み足場４１０を示しているが、本発明はこれに限定するものではなく、リンク機構４２０の数は何れであってもよい。また、リンク機構４２０の全てが取り付け柱（ヨークに設置されている）に取り付けられても、あるいは、リンク機構４２０の全てが取り付け間柱（腹起こし材に設置されている）に取り付けられてもよい。 As described above, the folding scaffold 410 can be folded close to the mounting column 920 (same as the yoke 900) and does not protrude to the inner peripheral side. When excavating up to the position using the excavating equipment 80, the excavation work is not hindered, particularly in a range close to the caisson housing 9 (see FIG. 22).
Note that the above shows the folding scaffold 410 including the link mechanisms 420a and 420b attached to the attachment pillars 920a and 920b and the link mechanism 420c attached to the attachment pillar 920c as the folding scaffold 410. The invention is not limited to this, and the number of link mechanisms 420 may be any. Further, all of the link mechanisms 420 may be attached to the attachment pillars (installed on the yoke), or all of the link mechanisms 420 may be attached to the attachment spacers (installed on the belly material). .

（円弧状の腹起こし材）
図１８は本発明の実施の形態７に係るケーソン圧入装置を説明するものであって、腹起こし材が円弧状である場合を示す平面図である。なお、実施の形態３または５と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。
図１８において、腹起こし材９１０は円弧状であって、腹起こし材９１０の内周側に、外周側が円弧状で、内周側が直線状の調整材９９０が設置され、調整材９９０に取り付け間柱９２０ｄ、９２０ｅ、９２０ｆが、それぞれ取り付けられている。
そして、取り付け間柱９２０ｄ、９２０ｅ、９２０ｆに、リンク機構４２０ａ、４２０ｂ、７２０ｃが、それぞれ取り付けられている。
すなわち、調整材９９０を取り付けることによって、折り畳み足場４１０を円弧状の腹起こし材９１０に対しても取り付けることができる。 (Arc-shaped lining material)
FIG. 18 is a plan view for explaining a caisson press-fitting device according to Embodiment 7 of the present invention and showing a case where the belly raising material has an arc shape. In addition, the same code | symbol is attached | subjected to this same part as Embodiment 3 or 5, and a part of description is abbreviate | omitted.
In FIG. 18, the bellows material 910 has an arc shape, and an adjustment material 990 having an arc shape on the outer peripheral side and a linear shape on the inner periphery side is installed on the inner peripheral side of the bellows material 910. 920d, 920e, and 920f are respectively attached.
Then, link mechanisms 420a, 420b, and 720c are respectively attached to the mounting pillars 920d, 920e, and 920f.
That is, by attaching the adjusting material 990, the folding scaffold 410 can also be attached to the arc-shaped erection material 910.

［実施の形態８］
図１９および図２０は本発明の実施の形態８に係るケーソン圧入装置を説明するものであって、図１９は展開した状態を示す側面図、図２０は折り畳んだ状態を示す側面図である。なお、実施の形態７と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。
実施の形態８に係るケーソン圧入装置５００は、実施の形態７に係るケーソン圧入装置４００における中段骨材１３０を、下段骨材１２０よりも長い中段骨材１１０に変更したコンクリート型枠用折り畳み足場（以下「折り畳み足場」と称す）５１０を有するものである。したがって、以下、折り畳み足場５１０について、主に、折り畳み足場４１０と相違する点について説明する。なお、中段骨材１１０の数量は限定するものではなく、それぞれが同様の構造であるため、以下の説明（含む「符号の説明」）において部材の符号に「ａ、ｂ、ｃ」等の添え字の記載を省略する。 [Embodiment 8]
19 and 20 illustrate a caisson press-fitting device according to an eighth embodiment of the present invention. FIG. 19 is a side view showing a developed state, and FIG. 20 is a side view showing a folded state. The same parts as those in the seventh embodiment are denoted by the same reference numerals, and a part of the description is omitted.
The caisson press-fitting device 500 according to the eighth embodiment is a concrete formwork folding scaffold in which the middle aggregate 130 in the caisson press-fitting device 400 according to the seventh embodiment is changed to a middle aggregate 110 longer than the lower aggregate 120 ( (Hereinafter referred to as “folding scaffold”) 510. Therefore, hereinafter, the folding scaffold 510 will be described mainly with respect to differences from the folding scaffold 410. In addition, since the quantity of the middle aggregate 110 is not limited and each has the same structure, “a, b, c” and the like are added to the reference numerals of the members in the following description (including “description of reference numerals”). Omitting the letter description.

（リンク機構）
図１９において、ケーソン圧入装置５００を構成する折り畳み足場５１０は、１または２以上のリンク機構５２０を有している。
リンク機構５２０は、取り付け柱９２０に対して回動自在に設置された中段骨材１１０、補助骨材１４０および下段骨材１２０と、取り付け柱９２０に対して平行な姿勢を保って移動する中段縦材２１０および下段縦材２２０と、これらの動きを規制するストッパー材３１０と、中段骨材１１０および下段骨材１２０にそれぞれ固定された中段床板１１５および下段床板１２５と、を具備している。 (Link mechanism)
In FIG. 19, the folding scaffold 510 constituting the caisson press-fitting device 500 has one or more link mechanisms 520.
The link mechanism 520 includes a middle-stage aggregate 110, an auxiliary aggregate 140, and a lower-stage aggregate 120 that are rotatably installed with respect to the mounting column 920, and a middle-stage vertical that moves while maintaining a parallel posture with respect to the mounting column 920. The material 210 and the lower stage vertical member 220, the stopper material 310 which controls these movements, and the middle stage floor board 115 and the lower stage floor board 125 respectively fixed to the middle stage aggregate 110 and the lower stage aggregate 120 are provided.

（中段骨材）
取り付け腕９３１はケーソン躯体９の内周側に突出し、取り付け腕９３１の先端部には一対の取り付け板９４１が固定され、取り付け板９４１には、中段取り付けピン９５１が貫通自在な図示しない取り付け孔が形成されている。
一方、中段骨材１１０の一方の端部１１１には、中段取り付けピン９５１が貫通自在な図示しない取り付け孔が形成され、端部１１１が一対の取り付け板９４１に挟まれた状態で、中段取り付けピン９５１が両者の取り付け孔を貫通している。すなわち、中段骨材１１０の一方の端部１１１が、取り付け柱９２０に設置された取り付け腕９３１に中段取り付けピン９５１によって回動自在に取り付けられている。
また、中段骨材１１０の他方の端部１１２には、中段連結ピン２１１が貫通自在な図示しない貫通孔が形成されている。また、一方の端部１１１と他方の端部１１２との間で、他方の端部１１２に近い位置に、展開時に下方に突出（折り畳み時に内周側に突出するに同じ）中段骨突部１１３が設けられ、中段骨突部１１３に中段連結ピン２２１が貫通自在な図示しない貫通孔が形成されている。 (Medium aggregate)
The mounting arm 931 protrudes to the inner peripheral side of the caisson housing 9, and a pair of mounting plates 941 are fixed to the tip of the mounting arm 931. The mounting plate 941 has a mounting hole (not shown) through which the middle mounting pin 951 can pass. Is formed.
On the other hand, an attachment hole (not shown) through which the intermediate attachment pin 951 can pass is formed in one end 111 of the intermediate aggregate 110, and the intermediate attachment pin is sandwiched between the pair of attachment plates 941. 951 penetrates both attachment holes. That is, one end 111 of the middle aggregate 110 is rotatably attached to the attachment arm 931 installed on the attachment column 920 by the middle attachment pin 951.
In addition, a through hole (not shown) through which the middle connecting pin 211 can pass is formed in the other end 112 of the middle aggregate 110. Further, between the one end portion 111 and the other end portion 112, at a position close to the other end portion 112, it projects downward when deployed (same as projecting to the inner peripheral side when folded). And a through hole (not shown) through which the middle connecting pin 221 can pass is formed in the middle bone protrusion 113.

（下段骨材）
また、下段骨材１２０は、一方の端部１２１が、取り付け柱９２０に設置された取り付け腕９３２に回動自在に取り付けられている。取り付け腕９３２はケーソン躯体９の内周側に突出し、取り付け腕９３２の先端部には一対の取り付け板９４２が固定され、取り付け板９４２には、下段取り付けピン９５２が貫通自在な図示しない取り付け孔が形成されている。一方、下段骨材１２０の一方の端部１２１には、下段取り付けピン９５２が貫通自在な図示しない取り付け孔が形成され、端部１２１が一対の取り付け板９４２に挟まれた状態で、下段取り付けピン９５２が両者の取り付け孔を貫通している。すなわち、下段骨材１２０の一方の端部１２１が、取り付け柱９２０に設置された取り付け腕９３２に下段取り付けピン９５２によって回動自在に取り付けられている。
また、下段骨材１２０の他方の端部１２２には、展開時に下方に突出（折り畳み時に内周側に突出するに同じ）下段骨突部１２３が設けられ、下段骨突部１２３に下段連結ピン２２２が貫通自在な図示しない貫通孔が形成されている。 (Lower aggregate)
Further, one end 121 of the lower aggregate 120 is rotatably attached to an attachment arm 932 installed on the attachment column 920. The mounting arm 932 protrudes to the inner peripheral side of the caisson housing 9, and a pair of mounting plates 942 are fixed to the tip of the mounting arm 932. The mounting plate 942 has a mounting hole (not shown) through which the lower mounting pin 952 can pass. Is formed. On the other hand, one end 121 of the lower aggregate 120 is formed with a mounting hole (not shown) through which the lower mounting pin 952 can pass, and the lower mounting pin 952 is sandwiched between the pair of mounting plates 942. 952 penetrates both attachment holes. That is, one end 121 of the lower aggregate 120 is rotatably attached to the attachment arm 932 installed on the attachment column 920 by the lower attachment pin 952.
Further, the other end 122 of the lower aggregate 120 is provided with a lower bone protrusion 123 that protrudes downward when deployed (same as protruding toward the inner periphery when folded), and a lower connection pin is connected to the lower bone protrusion 123. A through hole (not shown) through which 222 can pass is formed.

（補助骨材）
補助骨材１４０は、一方の端部１４１が、取り付け柱９２０に設置された補助取り付け腕９３４に回動自在に取り付けられている。
補助取り付け腕９３４はケーソン躯体９の内周側に突出し、先端部にストッパー取り付けピン９５３が貫通自在な図示しない貫通孔が形成され、先端部よりも外周側（取り付け柱９２０に近い位置）に補助取り付けピン９５４が貫通自在な図示しない貫通孔が形成されている。
そして、補助骨材１４０は、補助取り付けピン９５４によって、補助取り付け腕９３４に回動自在に取り付けられている。このとき、補助骨材１４０の一方の側面（鉛直面）は、補助取り付け腕９３４の一方の側面に対向している。
また、補助骨材１４０の他方の端部１４２は、補助連結ピン２１２によって中段縦材２１０に回動自在に連結されている。 (Auxiliary aggregate)
One end 141 of the auxiliary aggregate 140 is rotatably attached to an auxiliary attachment arm 934 installed on the attachment column 920.
The auxiliary mounting arm 934 protrudes to the inner peripheral side of the caisson housing 9, and a through hole (not shown) through which the stopper mounting pin 953 can pass is formed at the tip, and the auxiliary mounting arm 934 is auxiliary to the outer peripheral side (position closer to the mounting column 920) than the tip. A through hole (not shown) through which the attachment pin 954 can pass is formed.
The auxiliary aggregate 140 is rotatably attached to the auxiliary attachment arm 934 by an auxiliary attachment pin 954. At this time, one side surface (vertical surface) of the auxiliary aggregate 140 faces one side surface of the auxiliary attachment arm 934.
Further, the other end 142 of the auxiliary aggregate 140 is rotatably connected to the middle vertical member 210 by an auxiliary connecting pin 212.

（中段縦材）
中段縦材２１０には、中段連結ピン２１１および補助連結ピン２１２が、それぞれ貫通自在な図示しない貫通孔が形成され、中段縦材２１０は、中段骨材１１０および補助骨材１４０に中段連結ピン２１１および補助連結ピン２１２によって回動自在に連結されている。
また、中段連結ピン２１１が貫通する貫通孔に近い下方の位置に、ストッパー連結ピン２３３が貫通自在な図示しない貫通孔が形成されている。
さらに、中段縦材２１０には、先端部（上端部）に、吊り上げ手段（これについては別途詳細に説明する）の一部が係止するための吊り上げ用孔２１４が設けられ、先端（上端）および先端に近い位置に中段手摺り２１５が水平方向に固定されている。 (Middle vertical lumber)
The middle vertical member 210 is formed with through holes (not shown) through which the middle connecting pin 211 and the auxiliary connecting pin 212 can pass, respectively. The middle vertical member 210 is connected to the middle aggregate 110 and the auxiliary aggregate 140 by the middle connecting pin 211. The auxiliary connecting pins 212 are rotatably connected.
In addition, a through hole (not shown) through which the stopper connecting pin 233 can pass is formed at a lower position near the through hole through which the middle connecting pin 211 passes.
Further, the middle vertical member 210 is provided with a lifting hole 214 for locking a part of lifting means (this will be described in detail later) at the tip (upper end), and the tip (upper end). A middle handrail 215 is fixed in the horizontal direction at a position close to the tip.

（下段縦材）
下段縦材２２０には、上端部および下端部に、それぞれ中段連結ピン２２１および下段連結ピン２２２が貫通自在な図示しない貫通孔が形成されている。そして、下段縦材２２０は、中段骨材１１０および下段骨材１２０に中段連結ピン２２１および下段連結ピン２２２によって回動自在に連結されている。
さらに、下段縦材２２０には、下端部に近い位置に下段手摺り２２６が水平方向に固定されている。 (Lower vertical material)
The lower longitudinal member 220 is formed with through holes (not shown) through which the middle coupling pin 221 and the lower coupling pin 222 can pass, respectively, at the upper end and the lower end. The lower longitudinal member 220 is rotatably connected to the middle aggregate 110 and the lower aggregate 120 by a middle coupling pin 221 and a lower coupling pin 222.
Further, a lower handrail 226 is fixed to the lower longitudinal member 220 in the horizontal direction at a position near the lower end.

（ストッパー）
ストッパー材３１０は、外管３１３と、外管３１３の内部に進退自在に配置された内管３１２とから構成され、内管３１２の一方（外管３１３とは反対側）の端部３１１にはストッパー取り付けピン９５３が貫通自在な図示しない貫通孔が形成され、外管３１３の他方（内管３１２とは反対側）の端部３１４にはストッパー連結ピン２１３が貫通自在な図示しない貫通孔が形成されている。
そして、ストッパー材３１０の一方の端部３１１は、実施の形態７と同様に、ストッパー取り付けピン９５３によって補助取り付け腕９３４に回動自在に取り付けられ、他方の端部３１４は、ストッパー連結ピン２１３よって中段縦材２１０に回動自在に取り付けられている。
そして、ストッパー取り付けピン９５３とストッパー連結ピン２３３との距離は、一定の値よりも短くならないようになっている。
なお、ストッパー材３１０の取り付け位置は限定するものではなく、下段骨材１２０の下方に取り付けてもよく、中段骨材１１０の下方および下段骨材１２０の下方の両方に取り付けてもよい。また、ストッパー材３１０の形態は、図示するものに限定するものではない（これについては別途詳細に説明する）。 (stopper)
The stopper material 310 is composed of an outer tube 313 and an inner tube 312 that can be moved forward and backward inside the outer tube 313, and at one end 311 of the inner tube 312 (on the side opposite to the outer tube 313) A through hole (not shown) through which the stopper mounting pin 953 can pass is formed, and a through hole (not shown) through which the stopper connecting pin 213 can pass is formed at the other end (314) of the outer pipe 313 (the side opposite to the inner pipe 312). Has been.
Then, one end portion 311 of the stopper material 310 is rotatably attached to the auxiliary attachment arm 934 by a stopper attachment pin 953 and the other end portion 314 is attached to the stopper connection pin 213 in the same manner as in the seventh embodiment. It is rotatably attached to the middle vertical member 210.
The distance between the stopper mounting pin 953 and the stopper connecting pin 233 is not shorter than a certain value.
The attachment position of the stopper material 310 is not limited, and may be attached below the lower aggregate 120, or may be attached both below the middle aggregate 110 and below the lower aggregate 120. Moreover, the form of the stopper material 310 is not limited to what is illustrated (this will be described in detail separately).

（中段床板、下段床板）
中段床板１１５が中段骨材１１０に固定され、下段床板１２５が下段骨材１２０に固定されている。このとき、中段骨材１１０は下段骨材１２０よりも長いため、中段床板１１５を下段床板１２５よりも広くすることができる。そのため、施工に必要な機器類を、主に、中段床板１１５に載置し、下段床板１２５への載置を最少にすることができる。そうすると、折り畳み足場４１０を折り畳む際、前記機器類の撤去が容易になる。
なお、中段床板１１５および下段床板１２５がそれぞれ固定される中段骨材１１０の数および下段骨材１２０の数は限定するものではなく、何れであってもよい。
また、中段床板１１５および下段床板１２５の形態は限定するものではなく、鋼板（アンチスリップ鋼板）、グレーチング、複数の棒材ないし管材を並べた桟等、何れであってもよい。 (Middle and lower floor boards)
The middle floor plate 115 is fixed to the middle aggregate 110, and the lower floor plate 125 is fixed to the lower aggregate 120. At this time, since the middle aggregate 110 is longer than the lower aggregate 120, the middle floor board 115 can be made wider than the lower floor board 125. Therefore, the equipment necessary for construction can be mainly placed on the middle floor board 115 and the placement on the lower floor board 125 can be minimized. Then, when the folding scaffold 410 is folded, the devices can be easily removed.
In addition, the number of the middle stage aggregates 110 and the number of the lower stage aggregates 120 to which the middle stage floor board 115 and the lower stage floor board 125 are respectively fixed are not limited and may be any.
Moreover, the form of the middle floor board 115 and the lower floor board 125 is not limited, and any form such as a steel plate (anti-slip steel plate), a grating, a bar in which a plurality of bars or tubes are arranged, and the like may be used.

（リンク機構の動き）
図１９および図２０において、説明の便宜上、中段取り付けピン９５１の位置を「Ａ」、中段連結ピン２１１の位置を「Ｂ」、補助連結ピン２１２の位置を「Ｃ」、補助取り付けピン９５４の位置を「Ｄ」と称し、中段連結ピン２２１の位置を「Ｅ」、下段連結ピン２２２の位置を「Ｆ」、および下段取り付けピン９５２の位置を「Ｇ」と称す。また、ストッパー取り付けピン９５３およびストッパー連結ピン２１３の位置をそれぞれ「Ｈ」および「Ｉ」と称す。 (Link mechanism movement)
19 and 20, for convenience of explanation, the position of the middle mounting pin 951 is “A”, the position of the middle coupling pin 211 is “B”, the position of the auxiliary coupling pin 212 is “C”, and the position of the auxiliary mounting pin 954 Is referred to as “D”, the position of the middle connecting pin 221 is referred to as “E”, the position of the lower connecting pin 222 is referred to as “F”, and the position of the lower mounting pin 952 is referred to as “G”. The positions of the stopper mounting pin 953 and the stopper connecting pin 213 are referred to as “H” and “I”, respectively.

（展開した状態）
図１９に示す展開時において、中段骨材１１０と補助骨材１４０とは互いに平行であって、両者は取り付け柱９２０に対して垂直になり、中段縦材２１０は取り付け柱９２０に平行になっている。このとき、位置Ａ、位置Ｂ、位置Ｃ、位置Ｄおよび位置Ａを結ぶ線は、長方形を呈している。
また、下段骨材１２０は中段骨材１１０に平行であって、取り付け柱９２０に対して垂直になっているものの、位置Ａ、位置Ｅ、位置Ｆ、位置Ｇおよび位置Ａを結ぶ線は、平行四辺形を呈している。 (Expanded state)
At the time of deployment shown in FIG. 19, the middle aggregate 110 and the auxiliary aggregate 140 are parallel to each other, both are perpendicular to the mounting column 920, and the middle vertical member 210 is parallel to the mounting column 920. Yes. At this time, the lines connecting position A, position B, position C, position D, and position A are rectangular.
Further, although the lower aggregate 120 is parallel to the middle aggregate 110 and is perpendicular to the mounting column 920, the lines connecting position A, position E, position F, position G and position A are parallel. It has a quadrilateral shape.

一方、位置Ａ、位置Ｂ、位置Ｉ、位置Ｈおよび位置Ａを結ぶ線は、平行四辺形でも台形でもない四角形を呈し、位置Ｅと位置Ｉが近接しているため、略三角形を呈している。
そして、ストッパー取り付けピン９５３（位置Ｈ）とストッパー連結ピン２１３（位置Ｉ）との距離は、中段骨材１１０および下段骨材１２０が取り付け柱９２０に対して垂直になったとき、最も短くなるように構成されているから、中段骨材１１０の他方の端部１３２および下段骨材１２０の他方の端部１２２が、それぞれ一方の端部１１１および一方の端部１２１も下に倒伏することがない。
なお、平面視において、位置Ａと位置Ｂとを結ぶ線、位置Ｈと位置Ｉとを結ぶ線および位置Ｆと位置Ｇとを結ぶ線は、何れも同一平面内にあるため、重なる。一方、位置Ｃと位置Ｄとを結ぶ線（補助骨材１４０）は、位置Ａと位置Ｂとを結ぶ線（中段骨材１１０）とは重なることなく、所定の隙間を空けて平行になる（何れも図示しない）。 On the other hand, the line connecting position A, position B, position I, position H, and position A has a quadrangle that is neither a parallelogram nor a trapezoid, and has a substantially triangular shape because position E and position I are close to each other. .
The distance between the stopper mounting pin 953 (position H) and the stopper connecting pin 213 (position I) is the shortest when the middle aggregate 110 and the lower aggregate 120 are perpendicular to the mounting column 920. Therefore, the other end 132 of the middle aggregate 110 and the other end 122 of the lower aggregate 120 do not lie down on one end 111 and one end 121, respectively. .
Note that, in plan view, the line connecting the position A and the position B, the line connecting the position H and the position I, and the line connecting the position F and the position G are all in the same plane and therefore overlap. On the other hand, the line connecting the position C and the position D (auxiliary aggregate 140) is parallel to the line connecting the position A and the position B (intermediate aggregate 110) with a predetermined gap therebetween (see FIG. None of them are shown).

（折り畳み過程）
中段縦材２１０の吊り上げ用孔２１４に、図示しない吊り上げ手段（例えば、チェインブロック、ウインチ等）の一部を連結して、中段縦材２１０を吊り上げると、ストッパー材３１０は伸ばされ、中段骨材１１０の一方の端部１３１および下段骨材１２０の一方の端部１２１よりも、それぞれ他方の端部１３２および他方の端部１２２が高い位置になるように起立する。
このとき、位置Ａ、位置Ｂ、位置Ｃ、位置Ｄおよび位置Ａを結ぶ線は、長方形を呈していたものが、平行四辺形を呈するようになる。
一方、展開時に平行四辺形を呈していた位置Ａ、位置Ｅ、位置Ｆ、位置Ｇおよび位置Ａを結ぶ線は、一旦、長方形を呈した後、平行四辺形を呈する。 (Folding process)
When a part of lifting means (not shown) (for example, chain block, winch, etc.) is connected to the lifting hole 214 of the middle vertical member 210 and the middle vertical member 210 is lifted, the stopper member 310 is extended, and the middle step aggregate. The other end portion 132 and the other end portion 122 are positioned higher than the one end portion 131 of the 110 and the one end portion 121 of the lower aggregate 120.
At this time, the line connecting the position A, the position B, the position C, the position D, and the position A has a rectangular shape when it is a rectangle.
On the other hand, the lines connecting the positions A, E, F, G, and A that have been presenting a parallelogram at the time of development once present a rectangle and then a parallelogram.

（折り畳んだ状態）
図２０において、中段骨材１１０、補助骨材１４０および下段骨材１２０は起立して、取り付け柱９２０に対して平行になっている。
また、中段縦材２１０および下段縦材２２０は、取り付け柱９２０に対して平行になり、中段縦材２１０は下段縦材２２０の外周側（取り付け柱９２０寄りの位置）に位置している。
このとき、中段縦材２１０、中段骨材１１０および下段骨材１２０は、それぞれ取り付け柱９２０から等しい距離にあり、下段縦材２２０およびストッパー材３１０は、それぞれ取り付け柱９２０から等しい距離にある。
すなわち、立面視において、位置Ａと位置Ｂとを結ぶ直線は、位置Ｃと位置Ｄとを結ぶ直線に重なり、位置Ｅと位置Ｆとを結ぶ直線は、位置Ｈと位置Ｉとを結ぶ直線に重なっている。 (Folded)
In FIG. 20, the middle aggregate 110, the auxiliary aggregate 140, and the lower aggregate 120 stand up and are parallel to the mounting column 920.
Further, the middle vertical member 210 and the lower vertical member 220 are parallel to the mounting column 920, and the middle vertical member 210 is located on the outer peripheral side (position near the mounting column 920) of the lower vertical member 220.
At this time, the middle vertical member 210, the middle step aggregate 110, and the lower step aggregate 120 are at an equal distance from the mounting column 920, respectively, and the lower column member 220 and the stopper member 310 are at an equal distance from the mounting column 920, respectively.
That is, in an elevation view, a straight line connecting position A and position B overlaps a straight line connecting position C and position D, and a straight line connecting position E and position F is a straight line connecting position H and position I. It overlaps with.

以上のように、折り畳み足場５１０は、ヨーク９００に近接した状態に折り畳むことができ、内周側に突出しないため、ケーソン躯体１０によって囲まれた範囲を掘削底面９３の位置まで、掘削機器８０を用いて掘削する際、特にケーソン躯体９に近い範囲においても、掘削作業が阻害されることはない（図２２参照）。
なお、以上説明した折り畳み足場５１０は、取り付け柱９２０に取り付けられたリンク機構５２０を具備するものであり、このとき、リンク機構５２０の数は何れであってもよい。また、リンク機構５２０の全てが取り付け柱（ヨークに設置されている）に取り付けられても、リンク機構５２０の全てが取り付け間柱（腹起こし材に設置されている）に取り付けられてもよく、あるいは、リンク機構５２０の一部が取り付け柱に、残りのリンク機構５２０が取り付け間柱に取り付けられてもよい。また、調整材９９０を用いて円弧状の腹起こし材９１０に間接的に取り付けてもよい。 As described above, the folding scaffold 510 can be folded close to the yoke 900 and does not protrude to the inner peripheral side. When excavating using, excavation work is not hindered especially in the range close to the caisson housing 9 (see FIG. 22).
Note that the folding scaffold 510 described above includes the link mechanism 520 attached to the attachment column 920, and at this time, the number of the link mechanisms 520 may be any. Further, all of the link mechanisms 520 may be attached to the attachment pillars (installed on the yoke), or all of the link mechanisms 520 may be attached to the attachment spacers (installed on the belly material), or In addition, a part of the link mechanism 520 may be attached to the attachment pillar, and the remaining link mechanism 520 may be attached to the attachment pillar. Alternatively, the adjustment material 990 may be used to indirectly attach to the arcuate erection material 910.

（ストッパー材の変形例）
図２１は本発明の実施の形態８に係るケーソン圧入装置を説明するものであって、ストッパー材の変形例を示す側面図であって、（ａ）は固定式、（ｂ）は引っ張り式、（ｃ）はシリンダ式である。なお、図１９および図２０と同じ部分または相当する部分には同じ符号を付すと共に、一部の符号については記載を省略する。 (Deformer of stopper material)
FIG. 21 illustrates a caisson press-fitting device according to an eighth embodiment of the present invention, and is a side view showing a modified example of the stopper material, where (a) is a fixed type, (b) is a tension type, (C) is a cylinder type. Note that the same or corresponding portions as those in FIGS. 19 and 20 are denoted by the same reference numerals, and description of some reference numerals is omitted.

（固定式のストッパー材）
図２１の（ａ）において、ストッパー材３２１は、取り付け柱９２０および取り付け腕９３１の一方または両方に固定され、リンク機構５２０が展開した際、中段骨材１１０を取り付け柱９２０に対して垂直な姿勢に支持している。すなわち、取り付け柱９２０に対して垂直な姿勢の中段骨材１１０の下面が、ストッパー材３２１の上面に当接している。
また、ストッパー材３２２は、取り付け柱９２０および取り付け腕９３２の一方または両方に固定され、リンク機構５２０が展開した際、下段骨材１２０を取り付け柱９２０に対して垂直な姿勢に支持している。すなわち、取り付け柱９２０に対して垂直な姿勢の下段骨材１２０の下面が、ストッパー材３２２の上面に当接している。
なお、ストッパー材３２１またはストッパー材３２２の一方を撤去してもよい。あるいは、ストッパー材３２１またはストッパー材３２２の一方が補助骨材１４０を支持してもよい。 (Fixed stopper material)
In FIG. 21A, the stopper member 321 is fixed to one or both of the mounting column 920 and the mounting arm 931, and when the link mechanism 520 is deployed, the middle-stage aggregate 110 is positioned perpendicular to the mounting column 920. I support it. That is, the lower surface of the middle aggregate 110 in a posture perpendicular to the mounting column 920 is in contact with the upper surface of the stopper material 321.
The stopper member 322 is fixed to one or both of the attachment column 920 and the attachment arm 932, and supports the lower aggregate 120 in a posture perpendicular to the attachment column 920 when the link mechanism 520 is deployed. That is, the lower surface of the lower aggregate 120 in a posture perpendicular to the attachment column 920 is in contact with the upper surface of the stopper material 322.
Note that one of the stopper material 321 and the stopper material 322 may be removed. Alternatively, one of the stopper material 321 or the stopper material 322 may support the auxiliary aggregate 140.

（引っ張り式のストッパー材）
図２１の（ｂ）において、ストッパー材３３０は、取り付け腕９３１と、補助骨材１４０の他方の端部１４２とに跨がって設置され、両端間の距離が一定の値以上にならない部材である。例えば、可撓性を有する、チェーンや多関節リンク、あるいは、外管と、該外管に進退自在に挿入され、外管の一方の端部（内管とは反対側の端部）と内管の他方の端部（外管とは反対側の端部）との距離が、一定の値以上にならないように構成された伸縮部材である。
そして、リンク機構５２０が展開した際、中段骨材１１０を取り付け柱９２０に対して垂直な姿勢に支持している。すなわち、中段骨材１１０が取り付け柱９２０に対して垂直な姿勢のとき、ストッパー材３３０の両端間は最大に大きくなっている。
なお、ストッパー材３３０は、取り付け腕９３１と、補助骨材１４０の他方の端部１４２とに跨がって設置されるものに替えて、取り付け腕９３１と、中段縦材２１０の下端部とに跨がって設置したり、下段縦材２２０を下方に延長して、その下端部と取り付け腕９３２とに跨がって設置したりしてもよい。 (Pull-type stopper material)
In FIG. 21B, the stopper member 330 is a member that is installed across the attachment arm 931 and the other end 142 of the auxiliary aggregate 140, and the distance between both ends does not exceed a certain value. is there. For example, a flexible chain, multi-joint link, or outer tube, inserted into the outer tube so as to freely advance and retract, and one end of the outer tube (the end opposite to the inner tube) and the inner tube The telescopic member is configured such that the distance from the other end of the tube (the end opposite to the outer tube) does not exceed a certain value.
When the link mechanism 520 is deployed, the middle aggregate 110 is supported in a posture perpendicular to the attachment column 920. That is, when the middle aggregate 110 is in a posture perpendicular to the mounting column 920, the distance between both ends of the stopper material 330 is maximized.
In addition, the stopper material 330 is replaced with the one installed over the attachment arm 931 and the other end 142 of the auxiliary aggregate 140, and the attachment arm 931 and the lower end of the middle vertical member 210. Alternatively, the lower longitudinal member 220 may be extended downward and installed across the lower end portion and the attachment arm 932.

（シリンダーのストッパー材）
図２１の（ｃ）において、ストッパー材３４０は、空圧シリンダーであって、ストッパー材３４０と同様に、取り付け腕９３３と中段縦材２１０とに跨がって設置されている。このとき、ストッパー材３４０は、中段縦材２１０を上方に持ち上げることができるから、中段縦材２１０の上端部に形成されていた吊り上げ用孔２１４の形成を省略してもよい。したがって、折り畳み足場５１０を折り畳む際、中段縦材２１０を吊り上げるための機器を用意する必要がなくなるため、折り畳み作業が容易かつ迅速になる。
また、ストッパー材３１０、３２１、３２２、３３０の何れか１以上と共に設置して、折り畳み足場５１０を展開した際、ストッパー材３４０への空圧の供給を停止するようにしてもよい。また、空圧シリンダーに替えて、油圧シリンダーにしてもよい。 (Cylinder stopper material)
In FIG. 21C, the stopper material 340 is a pneumatic cylinder and is installed across the mounting arm 933 and the middle vertical member 210 in the same manner as the stopper material 340. At this time, since the stopper member 340 can lift the middle vertical member 210 upward, the formation of the lifting hole 214 formed in the upper end portion of the middle vertical member 210 may be omitted. Therefore, when the folding scaffold 510 is folded, it is not necessary to prepare a device for lifting the middle vertical member 210, so that the folding work is easy and quick.
Moreover, when installed with any one or more of the stopper materials 310, 321, 322, and 330 and the folding scaffold 510 is deployed, the supply of air pressure to the stopper material 340 may be stopped. Further, a hydraulic cylinder may be used instead of the pneumatic cylinder.

［実施の形態９］
図２２は本発明の実施の形態９に係るケーソン圧入工法を説明するものであって、ケーソン圧入装置４００を用いた作業の一部の工程における作業状況を説明する側面視の断面図である。なお、実施の形態６（特に、図１２の（ａ））と同じ部分にはこれと同じ符号を付し、一部の説明を省略する。また、一部の部材については記載を省略する。
図２２において、リフトアップジャッキ４と支持部材６との係止を開放して、圧入ジャッキ３を駆動して圧入桁２を下方に移動させることによって、圧入柱５を介してケーソン躯体１０を地盤９０に圧入する（工程２５）。このとき、圧入桁２は、圧入柱５ｂの下面とケーソン躯体１０の上面との間隔Ａ（図示しない）と、圧入量Ｂとを合計した下降量Ｃ（ジャッキアップ量Ｃに同じ）だけ下降する。 [Embodiment 9]
FIG. 22 illustrates the caisson press-fitting method according to the ninth embodiment of the present invention, and is a cross-sectional view in side view illustrating the work situation in a part of the work using the caisson press-fitting device 400. In addition, the same code | symbol is attached | subjected to this same part as Embodiment 6 (especially (a) of FIG. 12), and one part description is abbreviate | omitted. Further, description of some members is omitted.
In FIG. 22, the engagement between the lift-up jack 4 and the support member 6 is released, and the press-fitting jack 3 is driven to move the press-fitting girder 2 downward, whereby the caisson housing 10 is grounded via the press-fitting pillar 5. 90 (step 25). At this time, the press-fitting girder 2 is lowered by a descending amount C (same as the jack-up amount C), which is the sum of the distance A (not shown) between the lower surface of the press-fitting column 5b and the upper surface of the caisson housing 10 and the press-fitting amount B. .

そして、図示しない吊り上げ手段（例えば、圧入桁２に設置したホイスト、チエーンブロック等）によって、共通縦材２３０を吊り上げ、折り畳み足場４１０のリンク機構４２０を折り畳む（工程２６の１）。そうすると、共通縦材２３０、中段骨材１３０および下段骨材１２０は起立して、支持架構１２ａ、１２ｂの内周（ヨーク９００の内周に同じ）に近接して平行になるから、そこで、圧入されたケーソン躯体１０に囲まれた範囲を、掘削機器８０を用いて掘削底面９３の位置まで掘削する（工程２６の２）。
このとき、掘削機器８０を支持架構１２ａ、１２ｂに近づけても、掘削機器８０と折り畳み足場４１０との干渉がないことから、ケーソン躯体１０に囲まれた範囲の特にケーソン躯体１０に近い範囲における掘削作業が容易かつ迅速になる。よって、施工工期の短縮や施工コストの低減を図ることが可能になる。
さらに、掘削底面９３の位置までの掘削が終了したところで、共通縦材２３０を吊り下げ、折り畳み足場４１０を展開する（工程２６の３）。
なお、以上は、ケーソン圧入装置４００を用いた作業を示しているが、ケーソン圧入装置５００を用いた作業であっても、同様の作用効果が得られる。 Then, the common longitudinal member 230 is lifted by a lifting means (not shown) (for example, a hoist or a chain block installed in the press-fitting girder 2), and the link mechanism 420 of the folding scaffold 410 is folded (step 26-1). Then, the common longitudinal member 230, the middle stage aggregate 130 and the lower stage aggregate 120 stand up and become parallel to the inner periphery of the support frames 12a and 12b (same as the inner periphery of the yoke 900). The range surrounded by the caisson housing 10 thus formed is excavated to the position of the excavation bottom surface 93 by using the excavation equipment 80 (Step 26-2).
At this time, there is no interference between the excavation equipment 80 and the folding scaffolding 410 even if the excavation equipment 80 is brought close to the support frames 12a and 12b. Therefore, excavation in the range surrounded by the caisson housing 10 is particularly close to the caisson housing 10. Work becomes easy and quick. Therefore, it becomes possible to shorten the construction period and reduce the construction cost.
Further, when the excavation to the position of the excavation bottom surface 93 is completed, the common longitudinal member 230 is suspended, and the folding scaffold 410 is developed (Step 26-3).
In addition, although the above has shown the operation | work using the caisson press-fitting apparatus 400, even if it is the work | work using the caisson press-fitting apparatus 500, the same effect is obtained.

本発明によれば、外部のクレーンや、ケーソン躯体の周囲に設置される専用の圧入桁昇降装置等を不要にするため、装置が安価で、施工工期の短縮や施工コストの低減を可能にするから、各種形態で様々な地盤（傾斜地、河床や海底地盤等）に設置されるコンクリート製ケーソンの圧入装置ないし圧入工法として広く使用することができる。 According to the present invention, an external crane, a dedicated press-fitting girder lifting device installed around the caisson housing and the like are not required, so the device is inexpensive, and the construction period can be shortened and the construction cost can be reduced. Therefore, it can be widely used as a press-fitting device or press-fitting method for concrete caisson installed on various grounds (inclined ground, riverbed, seabed ground, etc.) in various forms.

１ジャッキ反力引張材
２圧入桁
３圧入ジャッキ
４リフトアップジャッキ
５圧入柱
６支持部材
７ａ外周側コンクリート型枠
７ｂ内周側コンクリート型枠
７ｃコンクリート打設部
８コンクリート
９ケーソン躯体
１０ケーソン躯体
１１ａ外周側コンクリート型枠用足場
１１ｂ内周側コンクリート型枠用足場
１２支持架構
１３ａ外周側コンクリート型枠用足場
１３ｂ内周側コンクリート型枠用足場
１４ａ外周側コンクリート型枠進退機構
１４ｂ内周側コンクリート型枠進退機構
２０ロッドずれ止め
２１ずれ止め基板
２２ずれ止め円筒
２３ずれ止め孔
８０掘削機器
９０地盤
９１地盤面
９２掘削底面
９３掘削底面
９８接続具
９９グランドアンカー
１００ケーソン圧入装置（実施の形態１）
１１０中段骨材
１１１端部
１１２端部
１１３中段骨突部
１１５中段床板
１２０下段骨材
１２１端部
１２２端部
１２３下段骨突部
１２５下段床板
１３０中段骨材
１３１端部
１３２端部
１３３中段骨突部
１４０補助骨材
１４１端部
１４２端部
２００ケーソン圧入装置（実施の形態３）
２１０中段縦材
２１１中段連結ピン
２１２補助連結ピン
２１３ストッパー連結ピン
２１４吊り上げ用孔
２１５中段手摺り
２２０下段縦材
２２１中段連結ピン
２２２下段連結ピン
２２６下段手摺り
２３０共通縦材
２３１中段連結ピン
２３２下段連結ピン
２３３ストッパー連結ピン
２３４吊り上げ用孔
２３５中段手摺り
２３６下段手摺り
３００ケーソン圧入装置（実施の形態５）
３１０ストッパー材
３１１端部
３１２内管
３１３外管
３１４端部
３２１ストッパー材
３２２ストッパー材
３３０ストッパー材
３４０ストッパー材
４００ケーソン圧入装置（実施の形態７）
４１０コンクリート型枠用折り畳み足場(折り畳み足場)
４２０ａリンク機構
４２０ｂリンク機構
４２０ｃリンク機構
５００ケーソン圧入装置（実施の形態８）
５１０コンクリート型枠用折り畳み足場(折り畳み足場)
５２０リンク機構
９００ａヨーク
９００ｂヨーク
９１０ａ腹起こし材
９１０ｂ腹起こし材
９２０ａ取り付け柱
９２０ｂ取り付け柱
９２０ｃ取り付け間柱
９２０ｄ取り付け間柱
９２０ｅ取り付け間柱
９２０ｆ取り付け間柱
９３１取り付け腕
９３２取り付け腕
９３３取り付け腕
９３４補助取り付け腕
９４１取り付け板
９４２取り付け板
９４３取り付け板
９５１中段取り付けピン
９５２下段取り付けピン
９５３ストッパー取り付けピン
９５４補助取り付けピン
９９０調整材 DESCRIPTION OF SYMBOLS 1 Jack reaction force tension material 2 Press-in girder 3 Press-in jack 4 Lift-up jack 5 Press-in pillar 6 Supporting member 7a Outer side concrete formwork 7b Inner side concrete formwork 7c Concrete placement part 8 Concrete 9 Caisson body 10 Caisson body 11a Outer part Side concrete formwork scaffolding 11b Inner peripheral side concrete formwork scaffolding 12 Support frame 13a Outer peripheral side concrete formwork scaffolding 13b Inner peripheral side concrete formwork scaffolding 14a Outer peripheral side concrete formwork advancing and retracting mechanism 14b Inner peripheral side concrete formwork Advancement / retraction mechanism 20 Rod stopper 21 Locking substrate 22 Locking cylinder 23 Locking hole 80 Drilling equipment 90 Ground 91 Ground surface 92 Drilling bottom surface 93 Drilling bottom surface 98 Connector 99 Ground anchor 100 Caisson press-fitting device (Embodiment 1)
110 Middle Aggregate 111 Ends 112 Ends 113 Middle Aggregate Projections 115 Middle Aggregate Plates 115 Lower Aggregate 121 Ends 122 Ends 123 Lower Aggregates 125 Lower Aggregates 130 Middle Aggregates 131 Ends 132 Ends 133 Middle Oste Projections Part 140 Auxiliary aggregate 141 End part 142 End part 200 Caisson press-fitting device (Embodiment 3)
210 Middle-stage vertical member 211 Middle-stage connection pin 212 Auxiliary connection pin 213 Stopper connection pin 214 Lifting hole 215 Middle-stage handrail 220 Lower-stage longitudinal member 221 Middle-stage connection pin 222 Lower-stage connection pin 226 Lower-stage handrail 230 Common longitudinal member 231 Middle-stage connection pin 232 Lower stage Connecting pin 233 Stopper connecting pin 234 Lifting hole 235 Middle handrail 236 Lower handrail 300 Caisson press-fitting device (Embodiment 5)
310 stopper material 311 end portion 312 inner tube 313 outer tube 314 end portion 321 stopper material 322 stopper material 330 stopper material 340 stopper material 400 caisson press-fitting device (Embodiment 7)
410 Folding scaffold for concrete formwork (folding scaffold)
420a Link mechanism 420b Link mechanism 420c Link mechanism 500 Caisson press-fitting device (Embodiment 8)
510 Folding scaffold for concrete formwork (folding scaffold)
520 Link mechanism 900a Yoke 900b Yoke 910a Belly raising material 910b Abdominal raising material 920a Mounting column 920b Mounting column 920c Mounting space 920d Mounting space 920e Mounting space 920f Mounting space 931 Mounting arm 934 Mounting arm 934 Mounting arm 934 Mounting arm 934 Mounting plate 943 Mounting plate 951 Middle mounting pin 952 Lower mounting pin 953 Stopper mounting pin 954 Auxiliary mounting pin 990 Adjustment material

Claims

Jack reaction force tension material connected to the ground anchor fixed to the ground,
A press-fitting girder in which a press-fitting jack and a lift-up jack are fixed;
Press-fit pillars,
Concrete formwork,
A support member that is embedded in a caisson housing placed in a concrete placement part sandwiched between the concrete molds and protrudes upward;
The press-fit jack is
By locking the jack reaction force tension material and moving the press-fitting girder downward, the caisson housing is press-fitted into the ground via the press-fitting pillars,
The lift-up jack is
A caisson press-fitting device, wherein the press-fitting girder is moved upward while being engaged with the support member.

Jack reaction force tension material connected to the ground anchor fixed to the ground,
A press-fitting girder in which a press-fitting jack and a lift-up jack are fixed;
Press-fit pillars,
A support member that is held up and down by the lift-up jack and is not allowed to fall freely;
A concrete formwork,
The press-fit jack is
By locking the jack reaction force tension material and moving the press-fitting girder downward, the caisson housing is press-fitted into the ground via the press-fitting pillars,
The lift-up jack is
A caisson press-fitting device, wherein the press-fitting girder is moved upward by moving the support member downward and pressing the lower surface of the support member against the upper surface of the caisson housing.

The caisson press-fitting device according to claim 2, wherein the press-fitting girder or the press-fitting jack is provided with a stopper that is locked to the jack reaction force tension member to prevent the press-fitting girder from falling freely.

A concrete formwork scaffold suspended from the press-fit girder,
The caisson press-fitting device according to any one of claims 1 to 3, further comprising a concrete mold advancement / retraction device that is fixed to the concrete formwork scaffold and moves the concrete formwork back and forth.

The caisson press-fitting device according to any one of claims 1 to 4, wherein the press-fitting column is installed in the press-fitting girder.

Jack reaction force tension material connected to the ground anchor fixed to the ground,
A press-fitting girder in which a press-fitting jack and a lift-up jack are fixed;
Press-fit pillars,
Concrete formwork,
A support member that is embedded in a caisson housing placed in a concrete placement part sandwiched between the concrete molds and protrudes upward;
The press-fit jack is
By locking the jack reaction force tension material and moving the press-fitting girder downward, the caisson housing is press-fitted into the ground via the press-fitting pillars,
The lift-up jack is
A caisson press-fitting method using a caisson press-fitting device by moving the press-fitting girder upward by locking to the support member,
Continuously pressing the lower part of the concrete formwork on the upper part of the caisson housing, continuously to the side of the caisson housing already press-fitted,
Placing concrete in a concrete placement section sandwiched between the concrete molds;
A step of separating the concrete formwork from the side surface of the caisson housing in which the placed concrete is solidified and integrated;
The step of press-fitting the caisson housing into the ground via the press-fitting pillar by releasing the engagement between the lift-up jack and the support member and driving the press-fitting jack to move the press-fitting girder downward. When,
Removing the ground surrounded by the pressed caisson housing;
Unlocking the press-fit jack and the jack reaction force tension material, driving the lift-up jack and moving the press-fit girder upward;
Caisson press-fit method characterized by repeating the above.

The caisson press-fitting method according to claim 6, further comprising a step of extending the length of the support member by joining an extension rod to the support member.

Jack reaction force tension material connected to the ground anchor fixed to the ground,
A press-fitting girder in which a press-fitting jack and a lift-up jack are fixed;
Press-fit pillars,
A support member held on the lift-up jack so that it can be raised and lowered and cannot fall freely; and a concrete formwork,
The press-fit jack is
By locking the jack reaction force tension material and moving the press-fitting girder downward, the caisson housing is press-fitted into the ground via the press-fitting pillars,
The lift-up jack is
A caisson press-in method using a caisson press-fitting device that moves the press-in girder upward by moving the support member downward and pressing the lower end of the support member against the upper surface of the caisson housing,
Continuously pressing the lower part of the concrete formwork on the upper part of the caisson housing, continuously to the side of the caisson housing already press-fitted,
Placing concrete in a concrete placement section sandwiched between the concrete molds;
A step of separating the concrete formwork from the side surface of the caisson housing in which the placed concrete is solidified and integrated;
The step of press-fitting the caisson housing into the ground via the press-fitting pillar by releasing the engagement between the lift-up jack and the support member and driving the press-fitting jack to move the press-fitting girder downward. When,
Removing the ground surrounded by the pressed caisson housing;
The engagement between the press-fit jack and the jack reaction force tension member is released, the lift-up jack is driven to move the support member downward, and the lower surface of the support member is moved to the upper surface of the caisson housing. Moving the press-fitting girder upward by pressing against
Caisson press-fit method characterized by repeating the above.

The press-fitting girder or the press-fitting jack is provided with a stopper for preventing the press-fitting girder from falling freely by being locked to the jack reaction force tension material.
The caisson press-fitting method according to claim 8, wherein, in the step of forming the concrete placing part, the stopper is driven to prevent the press-fitting girder from falling freely.

The caisson press-fitting device includes a concrete formwork scaffold suspended from the press-fitting girder, and a concrete formwork advancing and retreating device fixed to the concrete formwork scaffold and moving the concrete formwork forward and backward.
In the step of installing the concrete formwork, the concrete formwork advancing / retreating device advances the concrete formwork toward the caisson housing,
The caisson according to any one of claims 6 to 9, wherein in the step of separating the concrete formwork, the concrete formwork advancing / retreating device causes the concrete formwork to retreat in a direction away from the caisson housing. Press-in method.

The support member is
The support member is temporarily disposed between the press-fitting girder and the upper surface of the caisson housing, and before the step of press-fitting the caisson housing into the ground, the support member is mounted on the upper surface of the press-fitting girder and the caisson housing. In the step of moving the press-fitting girder upward or after the step of moving the press-fitting girder upward, the press-fitting column is removed from between the press-fitting girder and the upper surface of the caisson housing. The caisson press-fitting method according to any one of claims 6 to 10, wherein:

A vertical support frame installed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing;
A mounting post installed on the support frame;
A folding scaffold for a concrete form that is foldably installed on the mounting post;
The concrete formwork folding scaffold is:
Middle and lower aggregates, one end of which is rotatably mounted on the mounting column;
A common longitudinal member in which the other end portion of the middle-stage aggregate and the other end portion of the lower-stage aggregate are each rotatably installed and hold a posture parallel to the mounting column;
The other end of the middle-stage aggregate and the other end of the lower-stage aggregate can stand up so as to be higher than the one end of the middle-stage aggregate and the one end of the lower-stage aggregate, respectively. Thus, the other end of the middle aggregate and the other end of the lower aggregate do not fall down below one end of the middle aggregate and one end of the lower aggregate. A stopper material that supports at least one of the middle aggregate, the lower aggregate, and the common longitudinal member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
The caisson press-fitting device according to any one of claims 1 to 3, wherein the caisson press-fitting device is provided.

A vertical mounting column installed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing;
A horizontal flank installed on the mounting post;
An up-and-down mounting stud installed on the lining material;
A folding scaffold for concrete formwork that is foldably installed on the mounting stud,
The concrete formwork folding scaffold is:
Middle and lower aggregates, one end of which is rotatably installed in a vertical plane on the mounting stud; and
A common longitudinal member in which the other end portion of the middle-stage aggregate and the other end portion of the lower-stage aggregate are each rotatably installed and hold a posture parallel to the mounting column;
The other end of the middle-stage aggregate and the other end of the lower-stage aggregate can stand up so as to be higher than the one end of the middle-stage aggregate and the one end of the lower-stage aggregate, respectively. Thus, the other end of the middle aggregate and the other end of the lower aggregate do not fall down below one end of the middle aggregate and one end of the lower aggregate. A stopper material that supports at least one of the middle aggregate, the lower aggregate, and the common longitudinal member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
The caisson press-fitting device according to any one of claims 1 to 3, wherein the caisson press-fitting device is provided.

A vertical support frame installed in the press-fitting girder and disposed on the inner peripheral side of the caisson housing;
A mounting post installed on the support frame;
A folding scaffold for a concrete form that is foldably installed on the mounting post;
The concrete formwork folding scaffold is:
A middle aggregate, a lower aggregate and an auxiliary aggregate, one end of which is rotatably installed on the mounting column;
The other end of the middle aggregate and the other end of the auxiliary aggregate are rotatably installed, and a middle vertical member that holds a posture parallel to the mounting column;
A lower longitudinal member that is rotatably installed at a position near the other end of the middle aggregate and the other end of the lower aggregate, and holds a posture parallel to the mounting column;
The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate are respectively one end of the middle aggregate and one end of the auxiliary aggregate. The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate The middle aggregate and the lower bone so that the portions do not fall below one end of the middle aggregate, one end of the auxiliary aggregate, and one end of the lower aggregate, respectively. A stopper material that supports at least one of a material, the auxiliary aggregate, the middle vertical member, and the lower vertical member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
The caisson press-fitting device according to any one of claims 1 to 3, wherein the caisson press-fitting device is provided.

A vertical mounting column installed in the press-fitting girder and arranged on the inner peripheral side of the caisson housing, a horizontal bellows material installed in the mounting column, and a vertical direction installed in the bellows material And a folding scaffold for concrete formwork foldably installed on the mounting pillar.
The concrete formwork folding scaffold has a middle aggregate, a lower aggregate and an auxiliary aggregate, one end of which is tiltably installed on the mounting stud,
A middle vertical member in which the other end of the middle aggregate and the other end of the auxiliary aggregate are each rotatably installed, and maintain a posture parallel to the mounting stud;
A lower longitudinal member that is rotatably installed at a position near the other end of the middle aggregate and the other end of the lower aggregate, and maintains a posture parallel to the mounting stud;
The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate are respectively one end of the middle aggregate and one end of the auxiliary aggregate. The other end of the middle aggregate, the other end of the auxiliary aggregate, and the other end of the lower aggregate The middle aggregate and the lower bone so that the portions do not fall below one end of the middle aggregate, one end of the auxiliary aggregate, and one end of the lower aggregate, respectively. A stopper material that supports at least one of a material, the auxiliary aggregate, the middle vertical member, and the lower vertical member;
A middle floor board fixed to the middle aggregate;
A lower floor board fixed to the lower aggregate;
The caisson press-fitting device according to any one of claims 1 to 3, wherein the caisson press-fitting device is provided.

The stopper member includes a first tubular body and a second tubular body that is inserted into the first tubular body so as to freely advance and retreat, and an end portion of the first tubular body opposite to the second tubular body. The distance between the end of the second tubular body opposite to the first tubular body is not shorter than a predetermined length, and the distance from the second tubular body is not shorter than a predetermined length. Caisson press-fitting device.

A vertical support frame installed on the inner periphery of the caisson housing, installed on the press-fitting girder, a mounting column installed on the support frame, and a concrete formwork foldably installed on the mounting column A caisson press-in method using a caisson press-in device having a folding scaffold,
The concrete formwork folding scaffold has a middle aggregate and a lower aggregate whose one end is rotatably installed on the mounting column, and the other end of the middle aggregate and the other of the lower aggregate End portions of each of which are rotatably installed, a common longitudinal member that maintains a posture parallel to the mounting column, the other end portion of the middle aggregate and the other end portion of the lower aggregate, The other end of the middle aggregate and the other end of the lower aggregate can stand up so as to be higher than one end of the middle aggregate and the one end of the lower aggregate, respectively. Support at least one of the middle aggregate, the lower aggregate, and the common longitudinal so as not to fall below one end of the middle aggregate and one end of the lower aggregate A stopper material, and a middle floor board fixed to the middle aggregate Anda lower floor plate fixed to the lower aggregate,
In the step of removing the ground surrounded by the pressed caisson housing, the common longitudinal member is pulled upward, the middle and lower aggregates are made parallel to the mounting column, and the inserted caisson When the step of removing the ground surrounded by the skeleton is completed, the common longitudinal member is returned downward, and the middle and lower aggregates are perpendicular to the mounting column. The caisson press-fitting method as described in any one of 6-9.

A vertical mounting column installed in the press-fitting girder and arranged on the inner peripheral side of the caisson housing, a horizontal bellows material installed in the mounting column, and a vertical direction installed in the bellows material A caisson method using a caisson press-fitting device having a mounting pillar and a folding scaffold for a concrete form that is foldable on the mounting pillar,
The concrete formwork folding scaffold includes a middle aggregate and a lower aggregate, one end of which is rotatably installed in a vertical plane on the mounting stud, and the other end of the middle aggregate and the lower bone A common longitudinal member that is pivotably installed at the other end of the member and maintains a posture parallel to the mounting column, the other end of the middle step aggregate, and the other end of the lower step aggregate And the other end of the middle aggregate and the other end of the lower aggregate can be raised so that the respective parts are higher than one end of the middle aggregate and the one end of the lower aggregate At least one of the middle-stage aggregate, the lower-stage aggregate, and the common longitudinal so that one end of the middle-stage aggregate does not fall below one end of the middle-stage aggregate and one end of the lower-stage aggregate. The stopper material that supports the two and fixed to the middle aggregate Comprising a middle floor, and the lower floor plate fixed to the lower aggregate, the,
In the step of removing the ground surrounded by the press-fitted caisson housing, the common longitudinal member is pulled upward, the middle and lower aggregates are made parallel to the mounting studs, and the press-fitted caisson housing When the process of removing the ground surrounded by is completed, the common longitudinal member is returned downward, and the middle and lower aggregates are made perpendicular to the mounting studs. 10. The caisson press-fitting method as described in any one of 9 above.

A vertical support frame installed on the inner periphery of the caisson housing, installed on the press-fitting girder, a mounting column installed on the support frame, and a concrete formwork foldably installed on the mounting column A caisson press-in method using a caisson press-in device having a folding scaffold,
The concrete formwork folding scaffold includes a middle aggregate, a lower aggregate and an auxiliary aggregate, one end of which is rotatably installed on the mounting column, and the other end of the middle aggregate and the auxiliary A middle vertical member in which the other end of the aggregate is rotatably installed and maintains a posture parallel to the mounting column, a position near the other end of the middle aggregate, and the lower aggregate Each of the other end portions of the lower-stage vertical member that is rotatably installed and maintains a posture parallel to the mounting column, the other end portion of the middle-stage aggregate, and the other end portion of the auxiliary aggregate And the other end of the lower-stage aggregate stands up above the one end of the middle-stage aggregate, the one end of the auxiliary aggregate, and the one end of the lower-stage aggregate, respectively. The other end of the middle aggregate and the other end of the auxiliary aggregate The other end of the fine the lower aggregate is one end of each of the middle aggregate, so as not to fall down below the one end of the one end portion and the lower aggregate of the auxiliary aggregate A stopper member that supports at least one of the middle-stage aggregate, the lower-stage aggregate, the auxiliary aggregate, the middle-stage vertical member, and the lower-stage vertical member, a middle-stage floor plate fixed to the middle-stage aggregate, and the lower-stage aggregate A lower floor board fixed to the aggregate,
In the step of removing the ground surrounded by the press-fitted caisson housing, the middle vertical member is pulled upward, and the middle aggregate, the auxiliary aggregate and the lower aggregate are parallel to the mounting column, When the step of removing the ground surrounded by the pressed caisson housing is completed, the middle vertical member is returned downward, and the middle aggregate, the auxiliary aggregate, and the lower aggregate are attached to the mounting column. The caisson press-fitting method according to any one of claims 6 to 9, wherein the caisson press-fitting method is vertical.

A vertical mounting column installed in the press-fitting girder and arranged on the inner peripheral side of the caisson housing, a horizontal bellows material installed in the mounting column, and a vertical direction installed in the bellows material A caisson press-in method using a caisson press-in device having a mounting pillar and a folding scaffold for a concrete mold that is foldable on the mounting post,
The folding scaffold for concrete formwork includes a middle stage aggregate, a lower stage aggregate and an auxiliary aggregate, one end of which is installed to be freely tiltable on a mounting stud, and the other end of the middle stage aggregate and the auxiliary aggregate. The other end of each of the lower tiers is installed in a rotatable manner and maintains a posture parallel to the mounting stud, a position near the other end of the middle tier aggregate, and the other of the lower tier aggregates disposed end of rotatably respectively, wherein the lower longitudinal member for holding a posture parallel to the mounting studs, the other end of the middle aggregate, the other end of the auxiliary aggregate and the the other end of the lower aggregate is one end of each of the middle aggregate, freely standing to be higher than the one end portion of the one end portion and the lower aggregate of the auxiliary aggregate , The other end of the middle aggregate, the other end of the auxiliary aggregate The other end of the pre-said lower aggregate is one end of each of the middle aggregate, so as not to fall down below the one end of the one end portion and the lower aggregate of the auxiliary aggregate A stopper member that supports at least one of the middle-stage aggregate, the lower-stage aggregate, the auxiliary aggregate, the middle-stage vertical member, and the lower-stage vertical member, a middle-stage floor plate fixed to the middle-stage aggregate, and the lower-stage aggregate A lower floor board fixed to the aggregate,
In the process of removing the ground surrounded by the press-fitted caisson housing, the middle vertical member is pulled upward, the middle aggregate, the auxiliary aggregate and the lower aggregate are made parallel to the mounting column, When the step of removing the ground surrounded by the caisson housing that has been press-fitted is completed, the middle vertical member is returned downward, and the middle aggregate, the auxiliary aggregate, and the lower aggregate are perpendicular to the mounting stud. The caisson press-fitting method according to any one of claims 6 to 9, wherein: