JP7765281B2 - Beam member erection method - Google Patents
Beam member erection methodInfo
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Description
本発明は、複数の架設対象部材間に配置される梁部材を前記架設対象部材間に架設する梁部材の架設方法に関する。 The present invention relates to a beam member installation method for installing a beam member between multiple installation target members.
本発明の背景技術としては、例えば、ＰＣａ造の小梁の下部側を形成する小梁部材（梁部材）の梁端側の上面に、仮設受部材を、その一端部が小梁部材の梁端部から突出する状態で固定し、この仮設受部材の一端部を、ＰＣａ造の大梁の下部側を形成する大梁部材（架設対象部材）の上面に載置した後、大梁の上部及び小梁の上部などを形成する後打ちコンクリートを打設して、仮設受部材を大梁と小梁に埋設することで、大梁と小梁とを接合する施工方法がある（例えば特許文献１参照）。 The background art of this invention includes, for example, a construction method in which a temporary support member is fixed to the upper surface of the beam end side of a sub-beam member (beam member) that forms the lower side of a precast concrete sub-girder, with one end of the member protruding from the beam end of the sub-girder member, and one end of this temporary support member is placed on the upper surface of the main beam member (member to be erected) that forms the lower side of the precast concrete main girder. After that, post-cast concrete is poured to form the upper parts of the main girder and the sub-girder, and the temporary support member is embedded in the main girder and the sub-girder, thereby joining the main girder and the sub-girder (see, for example, Patent Document 1).
又、ＰＣａ小梁（梁部材）の上端に、仮設用鋼材を、ＰＣａ小梁の梁端面から若干長突出させた状態で備え、この仮設用鋼材の突出部を大梁（架設対象部材）の金物上に載置した状態で、ＰＣａ大梁とＰＣａ小梁とを接合し、この接合後に施工されるスラブで仮設用鋼材を隠すようにしたＰＣａ大梁とＰＣａ小梁との接合方法がある（例えば特許文献２参照）。 There is also a method of joining a PCa girder and a PCa sub-girder in which temporary steel material is provided at the top end of the PCa sub-girder (beam member) so that it protrudes slightly beyond the beam end face of the PCa sub-girder, and the PCa girder and the PCa sub-girder are joined with the protruding portion of this temporary steel material placed on the metal fittings of the main girder (member to be erected), and the temporary steel material is hidden by a slab that is constructed after this joining (see, for example, Patent Document 2).
上記特許文献１－２に記載の施工方法又は接合方法では、複数の大梁又は大梁部材などが架設対象部材であり、又、架設対象部材間に架設される梁部材が小梁又は小梁部材であることから、梁部材の両端部上面に、仮設受部材又は仮設用鋼材といった受け鉄骨を、その一端部が梁部材の梁端部から梁部材の架設方向に張り出す状態で取り付けた後、受け鉄骨の一端部が架設対象部材の上面に載置されるように梁部材を架設対象部材間に配置することで、梁部材を、その上面と架設対象部材の上面との高さ位置を揃えた状態で架設対象部材間に架設するようにしている。
しかしながら、梁部材によっては、その上面の高さ位置を架設対象部材の上面の高さ位置に揃えることが望ましくないものもあり、このような梁部材を架設対象部材間に架設する場合には、上記特許文献１－２に記載の施工方法又は接合方法を採用することはできないことから、架設対象部材に対して梁部材を所望の高さ位置に配置した状態で架設対象部材間に架設するための梁部材の架設方法の提案が望まれている。
In the construction method or joining method described in Patent Documents 1-2 above, the members to be erected are multiple main girders or main girder members, and the beam members erected between the members to be erected are sub-beams or sub-beam members. Therefore, a supporting steel frame such as a temporary supporting member or temporary steel material is attached to the upper surfaces of both ends of the beam members with one end extending from the beam end of the beam member in the erection direction of the beam member, and the beam members are then placed between the members to be erected so that one end of the supporting steel frame is placed on the upper surface of the member to be erected. This allows the beam member to be erected between the members to be erected with the height position of its upper surface aligned with the upper surface of the member to be erected.
However, with some beam members, it is not desirable to align the height position of their upper surface with the height position of the upper surface of the member to be erected, and when erecting such a beam member between the members to be erected, the construction methods or joining methods described in Patent Documents 1 and 2 above cannot be adopted.Therefore, there is a need to propose a method of erecting a beam member that allows the beam member to be erected between the members to be erected while being positioned at a desired height relative to the members to be erected.
この実情に鑑み、本発明の主たる課題は、梁部材を架設対象部材に対して所望の高さ位置に配置した状態で架設対象部材間に架設することが可能な梁部材の架設方法を提供する点にある。 In light of this situation, the primary objective of the present invention is to provide a method for erecting a beam member that allows the beam member to be erected between the target members while being positioned at a desired height relative to the target members.
本発明の第１特徴構成は、複数の架設対象部材間に配置される梁部材を前記架設対象部材間に架設する梁部材の架設方法であって、
前記梁部材の梁端部に受け鉄骨をその一端部が前記梁部材の梁端部から前記梁部材の架設方向に張り出す状態で取り付ける受け鉄骨取り付け工程と、
前記受け鉄骨の一端部が前記架設対象部材の上面に載置されるように前記梁部材を前記架設対象部材間に配置する梁部材配置工程と、
前記梁部材の梁端部を前記架設対象部材の側面に接合して前記梁部材を前記架設対象部材間に架設する梁部材架設工程と、が備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨が、前記梁部材の上下中間部位に配置された状態で、前記梁部材の梁端部に取り外し可能に取り付けられ、
前記梁部材架設工程においては、前記梁部材の梁端部を前記架設対象部材の側面に接合した後に、前記受け鉄骨が前記梁部材の梁端部から撤去される点にある。
A first characteristic configuration of the present invention is a beam member installation method for installing a beam member between a plurality of installation target members, the method comprising:
a support steel frame installation process for installing a support steel frame to the beam end of the beam member in a state in which one end of the support steel frame protrudes from the beam end of the beam member in the erection direction of the beam member;
a beam member arranging step of arranging the beam member between the members to be erected so that one end of the supporting steel frame is placed on an upper surface of the member to be erected;
a beam member erection process of joining the beam end portions of the beam members to the side surfaces of the erection target members to erect the beam members between the erection target members,
In the support steel frame attaching step, the support steel frame is removably attached to the beam end of the beam member in a state where it is arranged in the upper and lower intermediate portion of the beam member,
In the beam member erection process, the beam end of the beam member is joined to the side surface of the member to be erected, and then the supporting steel frame is removed from the beam end of the beam member .
本構成によると、受け鉄骨取り付け工程において、受け鉄骨を、架設対象部材に対して梁部材を所望の高さ位置に配置するのに適した梁部材の上下中間部位に配置した状態で梁部材の梁端部に取り付けておけば、梁部材配置工程において、受け鉄骨の一端部を架設対象部材の上面に載置することにより、梁部材を架設対象部材に対する所望の高さに位置させた状態で架設対象部材間に配置することができ、これにより、梁部材架設工程においては、梁部材を架設対象部材に対する所望の高さに配置した状態で架設対象部材間に架設することができる。
その結果、梁部材を、架設対象部材に対する所望の高さ位置に容易に配置することができ、この配置状態で架設対象部材間に架設することができる。
又、本構成によると、梁部材架設工程において撤去した受け鉄骨を、他の梁部材を架設対象部材間に架設するときの受け鉄骨取り付け工程において再利用することができる。
その結果、受け鉄骨の装備数を削減することによる部材管理の容易化や鋼材費の削減などを図ることができる。
According to this configuration, in the supporting steel frame installation process, the supporting steel frame is attached to the beam end of the beam member in a state where it is positioned at the middle upper or lower part of the beam member that is suitable for positioning the beam member at the desired height relative to the member to be erected.In this way, in the beam member positioning process, by placing one end of the supporting steel frame on the top surface of the member to be erected, the beam member can be positioned between the members to be erected at the desired height relative to the member to be erected.As a result, in the beam member erection process, the beam member can be erected between the members to be erected at the desired height relative to the member to be erected.
As a result, the beam member can be easily positioned at a desired height relative to the members to be erected, and can be erected between the members to be erected in this position.
Furthermore, with this configuration, the supporting steel frame removed in the beam member erection process can be reused in the supporting steel frame installation process when erecting other beam members between the members to be erected.
As a result, it is possible to simplify component management and reduce steel costs by reducing the number of supporting steel frames installed.
本発明の第２特徴構成は、前記梁部材には、前記架設対象部材間に配置される梁部分と当該梁部分における梁幅方向の一端部から立上がる立上り部とが備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨の底面が前記梁部分と前記立上り部との境界に位置する状態で前記受け鉄骨が前記梁部材の上下中間部位に取り付けられる点にある。
In a second characteristic configuration of the present invention, the beam member includes a beam portion disposed between the installation target members and a rising portion rising from one end of the beam portion in the beam width direction,
In the supporting steel frame mounting process, the supporting steel frame is mounted at the middle portion above and below the beam member with the bottom surface of the supporting steel frame positioned at the boundary between the beam portion and the rising portion.
本構成によると、受け鉄骨取り付け工程において、受け鉄骨が、その底面が梁部材の梁部分と立上り部との境界に位置する状態で梁部材の梁端部に取り付けられていることから、梁部材配置工程において、受け鉄骨の一端部を架設対象部材の上面に載置することにより、梁部材の梁部分が架設対象部材間に位置し、かつ、梁部材の立上り部が架設対象部材間の上側に位置する状態で、梁部材を架設対象部材間に配置することができ、これにより、梁部材架設工程においては、梁部材の梁部分が架設対象部材間に配置され、かつ、梁部材の立上り部が架設対象部材間の上側に配置された状態で、梁部材を架設対象部材間に架設することができる。
その結果、梁部分と立上り部とが備えられた梁部材を架設対象部材間に適正な状態で容易に架設することができる。
According to this configuration, in the supporting steel frame installation process, the supporting steel frame is attached to the beam end of the beam member with its bottom surface located at the boundary between the beam portion and the rising portion of the beam member.Therefore, in the beam member placement process, by placing one end of the supporting steel frame on the top surface of the member to be erected, the beam member can be placed between the members to be erected with the beam portion of the beam member located between the members to be erected and the rising portion of the beam member located above the members to be erected.As a result, in the beam member erection process, the beam member can be erected between the members to be erected with the beam portion of the beam member located between the members to be erected and the rising portion of the beam member located above the members to be erected.
As a result, the beam member having the beam portion and the rising portion can be easily erected between the erection target members in an appropriate state.
本発明の第３特徴構成は、複数の架設対象部材間に配置される梁部材を前記架設対象部材間に架設する梁部材の架設方法であって、
前記梁部材の梁端部に受け鉄骨をその一端部が前記梁部材の梁端部から前記梁部材の架設方向に張り出す状態で取り付ける受け鉄骨取り付け工程と、
前記受け鉄骨の一端部が前記架設対象部材の上面に載置されるように前記梁部材を前記架設対象部材間に配置する梁部材配置工程と、
前記梁部材の梁端部を前記架設対象部材の側面に接合して前記梁部材を前記架設対象部材間に架設する梁部材架設工程と、が備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨が、前記梁部材の上下中間部位に配置された状態で、前記梁部材の梁端部に取り付けられ、
前記梁部材には、前記架設対象部材間に配置される梁部分と当該梁部分における梁幅方向の一端部から立上がる立上り部とが備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨の底面が前記梁部分と前記立上り部との境界に位置する状態で、前記受け鉄骨が、前記梁部材の上下中間部位で、かつ、前記梁部分と前記立上り部との境界における梁幅方向の中央よりも前記立上り部側に偏倚した梁幅方向のバランス位置に取り付けられる点にある。
A third characteristic configuration of the present invention is a method for erecting a beam member between a plurality of erection target members, the method comprising:
a support steel frame installation process for installing a support steel frame to the beam end of the beam member in a state in which one end of the support steel frame protrudes from the beam end of the beam member in the erection direction of the beam member;
a beam member arranging step of arranging the beam member between the members to be erected so that one end of the supporting steel frame is placed on an upper surface of the member to be erected;
a beam member erection process of joining the beam end portions of the beam members to the side surfaces of the erection target members to erect the beam members between the erection target members,
In the supporting steel frame attaching step, the supporting steel frame is attached to the beam end of the beam member in a state where it is arranged in the upper and lower intermediate portion of the beam member ,
The beam member includes a beam portion disposed between the installation target members and a rising portion rising from one end of the beam portion in the beam width direction,
In the supporting steel frame installation process, the bottom surface of the supporting steel frame is positioned at the boundary between the beam portion and the rising portion, and the supporting steel frame is installed at the middle part between the top and bottom of the beam member, at a balanced position in the beam width direction that is biased toward the rising portion side rather than the center in the beam width direction at the boundary between the beam portion and the rising portion.
本構成によると、受け鉄骨取り付け工程において、受け鉄骨を、架設対象部材に対して梁部材を所望の高さ位置に配置するのに適した梁部材の上下中間部位に配置した状態で梁部材の梁端部に取り付けておけば、梁部材配置工程において、受け鉄骨の一端部を架設対象部材の上面に載置することにより、梁部材を架設対象部材に対する所望の高さに位置させた状態で架設対象部材間に配置することができ、これにより、梁部材架設工程においては、梁部材を架設対象部材に対する所望の高さに配置した状態で架設対象部材間に架設することができる。
その結果、梁部材を、架設対象部材に対する所望の高さ位置に容易に配置することができ、この配置状態で架設対象部材間に架設することができる。
又、本構成によると、受け鉄骨取り付け工程において、受け鉄骨が、その底面が梁部材の梁部分と立上り部との境界に位置する状態で梁部材の梁端部に取り付けられていることから、梁部材配置工程において、受け鉄骨の一端部を架設対象部材の上面に載置することにより、梁部材の梁部分が架設対象部材間に位置し、かつ、梁部材の立上り部が架設対象部材間の上側に位置する状態で、梁部材を架設対象部材間に配置することができ、これにより、梁部材架設工程においては、梁部材の梁部分が架設対象部材間に配置され、かつ、梁部材の立上り部が架設対象部材間の上側に配置された状態で、梁部材を架設対象部材間に架設することができる。
その結果、梁部分と立上り部とが備えられた梁部材を架設対象部材間に適正な状態で容易に架設することができる。
しかも、本構成によると、受け鉄骨取り付け工程において、受け鉄骨が、梁部分と立上り部との境界における梁幅方向のバランス位置に取り付けられていることから、受け鉄骨を利用して梁部材をクレーンなどの揚重機で揚重するときの梁部材の揚重姿勢や、受け鉄骨の一端部を架設対象部材の上面に載置して梁部材を架設対象部材間に配置したときの梁部材の配置姿勢を、梁部材を架設対象部材間に架設するのに適した姿勢に安定性良く維持し易くなる。
その結果、梁部分における梁幅方向の一端部から立上がる立上り部を備えることで重量バランスが低下した梁部材を架設対象部材間に容易に適正な状態で架設することができる。
According to this configuration, in the supporting steel frame installation process, the supporting steel frame is attached to the beam end of the beam member in a state where it is positioned at the middle upper or lower part of the beam member that is suitable for positioning the beam member at the desired height relative to the member to be erected.In this way, in the beam member positioning process, by placing one end of the supporting steel frame on the top surface of the member to be erected, the beam member can be positioned between the members to be erected at the desired height relative to the member to be erected.As a result, in the beam member erection process, the beam member can be erected between the members to be erected at the desired height relative to the member to be erected.
As a result, the beam member can be easily positioned at a desired height relative to the members to be erected, and can be erected between the members to be erected in this position.
Furthermore, according to this configuration, in the supporting steel frame installation process, the supporting steel frame is attached to the beam end of the beam member with its bottom surface located at the boundary between the beam portion and the rising portion of the beam member.Therefore, in the beam member placement process, by placing one end of the supporting steel frame on the top surface of the member to be erected, the beam member can be placed between the members to be erected with the beam portion of the beam member located between the members to be erected and the rising portion of the beam member located above the members to be erected.As a result, in the beam member erection process, the beam member can be erected between the members to be erected with the beam portion of the beam member located between the members to be erected and the rising portion of the beam member located above the members to be erected.
As a result, the beam member having the beam portion and the rising portion can be easily erected between the erection target members in an appropriate state.
Furthermore, according to this configuration, in the support steel frame installation process, the support steel frame is installed at a balanced position in the beam width direction at the boundary between the beam portion and the rising portion, so that the lifting posture of the beam member when the support steel frame is used to lift the beam member with a lifting machine such as a crane, and the positioning posture of the beam member when one end of the support steel frame is placed on the top surface of the member to be erected and the beam member is positioned between the members to be erected, can be easily and stably maintained in a posture suitable for erecting the beam member between the members to be erected.
As a result, by providing a rising portion that rises from one end of the beam portion in the beam width direction, a beam member with poor weight balance can be easily erected in an appropriate state between the members to be erected.
以下、本発明を実施するための形態の一例を図面に基づいて説明する。 Below, an example of an embodiment of the present invention will be described with reference to the drawings.
本実施形態で例示する梁部材の架設方法においては、図１～４に示すように、複数の架設対象部材１として、スタジアムやアリーナなどのスタンドを構築する場合に、スタンド構築領域に後上りの傾斜姿勢で設置される複数の段梁１が例示されている。そして、複数の段梁１間に架設される梁部材２には、段梁１間に配置される梁部分２Ａと、当該梁部分２Ａにおける梁幅方向の一端部から立上がる立上り部２Ｂとしての手摺り部２Ｂとが備えられている。
尚、梁部材２は、立上り部２Ｂとして手摺り部２Ｂ以外の例えば腰壁などが備えられたものであってもよい。
1 to 4, in the beam member erection method exemplified in this embodiment, when constructing stands for a stadium, arena, etc., a plurality of step beams 1 that are installed in a rear-upward inclined position in a stand construction area are exemplified as a plurality of erection target components 1. The beam member 2 erected between the plurality of step beams 1 includes a beam portion 2A that is arranged between the step beams 1, and a handrail portion 2B that serves as a rising portion 2B that rises from one end of the beam portion 2A in the beam width direction.
The beam member 2 may be provided with a waist wall or the like other than the handrail portion 2B as the rising portion 2B.
図１～４に示すように、各段梁１及び梁部材２はプレキャスト鉄筋コンクリート製で、各段梁１の最上段部１Ａが梁部材２の架設位置に設定されている。各段梁１の最上段部１Ａには、梁部材２の主筋２１に接合される複数（本実施形態では４本）の鉄筋１１が埋設されている。そして、各最上段部１Ａの左右両側面における各鉄筋１１の周囲には、梁部材２の梁部分２Ａに内蔵された機械式継手２２による段梁１の鉄筋１１と梁部材２の主筋２１との接合を可能にする円形の凹部１２が形成されている。各最上段部１Ａの左右両側面と、これらの側面に接合される梁部材２の梁端面には、それらの間に無収縮モルタルやコンクリートなどの硬化性充填材３を充填して一体化させる際に、それらの一体化をより好適に行えるようにする凹部（コッター）１３，２３が形成されている。梁部材２の手摺り部２Ｂには、梁部分２Ａが段梁１の最上段部１Ａ間に配置された場合に、最上段部１Ａの上面に載置された状態で最上段部１Ａの左右中央まで張り出す張出部分２Ｂａが備えられている。
尚、各段梁１としては、最上段部１Ａ以外の例えば上下中間部などが梁部材２の架設位置に設定されたものであってもよい。
As shown in Figures 1 to 4, each step beam 1 and beam member 2 is made of precast reinforced concrete, and the topmost portion 1A of each step beam 1 is set at the installation position of the beam member 2. A plurality of reinforcing bars 11 (four in this embodiment) are embedded in the topmost portion 1A of each step beam 1 and are joined to the main reinforcing bars 21 of the beam member 2. Circular recesses 12 are formed around each reinforcing bar 11 on both left and right sides of each topmost portion 1A, allowing the reinforcing bars 11 of the step beam 1 to be joined to the main reinforcing bars 21 of the beam member 2 by mechanical joints 22 built into the beam portion 2A of the beam member 2. Recesses (cotters) 13, 23 are formed on both left and right sides of each topmost portion 1A and on the beam end faces of the beam members 2 joined to these sides, allowing for more efficient integration when a hardening filler 3, such as non-shrink mortar or concrete, is filled between the left and right sides to integrate the reinforcing bars. The handrail portion 2B of the beam member 2 is provided with a protruding portion 2Ba that protrudes to the center of the left and right of the topmost step 1A when placed on the top surface of the topmost step 1A when the beam portion 2A is arranged between the topmost step 1A of the step beam 1.
In addition, each step beam 1 may be set at a position other than the top step portion 1A, such as an intermediate portion above or below, at which the beam member 2 is erected.
梁部材２の架設方法について説明すると、図１～４に示すように、梁部材２の架設方法には、梁部材２の架設に使用する一対の受け鉄骨４を梁部材に取り付ける受け鉄骨取り付け工程と、受け鉄骨４を使用して梁部材２を段梁１間に配置する梁部材配置工程と、梁部材２を段梁１間に架設する梁部材架設工程とが備えられている。
尚、受け鉄骨４には、例えば、Ｈ形鋼や溝形鋼などの形鋼材を採用することができる。
Regarding the method for erecting the beam member 2, as shown in Figures 1 to 4, the method for erecting the beam member 2 includes a support steel frame attachment process for attaching a pair of support steel frames 4 used for erecting the beam member 2 to the beam member, a beam member placement process for arranging the beam member 2 between the step beams 1 using the support steel frames 4, and a beam member erection process for erecting the beam member 2 between the step beams 1.
The supporting steel frame 4 may be made of steel members such as H-shaped steel or channel steel.
受け鉄骨取り付け工程においては、図１に示すように、複数のアンカーボルト５を使用して、梁部材２の梁端部に受け鉄骨４をその一端部が梁部材２の梁端部から梁部材２の架設方向に張り出す状態で取り外し可能に取り付ける。図１、図３に示すように、各受け鉄骨４は、それらの底面が梁部材２の梁部分２Ａと手摺り部２Ｂとの境界に位置する状態で、具体的には、各受け鉄骨４の底面が梁部材２の梁部分２Ａと手摺り部２Ｂとの境界となる梁部分２Ａの上面に載置された状態で、かつ、梁部材２における梁幅方向の中央よりも手摺り部２Ｂ側に偏倚した梁部材２の梁幅方向での重量の均衡を保つバランス位置に位置する状態で、梁部材２の上下中間部位に取り付けられる。 In the support steel frame installation process, as shown in Figure 1, multiple anchor bolts 5 are used to removably attach support steel frames 4 to the beam ends of beam member 2, with one end extending from the beam end in the erection direction of beam member 2. As shown in Figures 1 and 3, each support steel frame 4 is attached to the middle of the upper and lower sections of beam member 2 with its bottom surface positioned at the boundary between beam portion 2A and handrail portion 2B of beam member 2. Specifically, the bottom surface of each support steel frame 4 is placed on the top surface of beam portion 2A, which is the boundary between beam portion 2A and handrail portion 2B of beam member 2, and is positioned in a balance position that maintains weight balance in the beam width direction of beam member 2, which is biased toward handrail portion 2B rather than the center of the beam width direction of beam member 2.
梁部材配置工程においては、図１～３に示すように、図示しないクレーンなどの揚重機のフックを、玉掛用のワイヤーロープ６などを介して、各受け鉄骨４に備えた玉掛け部４Ａに玉掛けした後、揚重機にて受け鉄骨４とともに梁部材２を段梁１の最上段部１Ａの上方まで揚重し、揚重した梁部材２の梁端部から張り出した各受け鉄骨４の一端部が段梁１における最上段部１Ａの上面に載置されるように梁部材２の梁部分２Ａを段梁１の最上段部１Ａ間に配置して、各受け鉄骨４の一端部を手摺り部２Ｂの張出部分２Ｂａとともに段梁１における最上段部１Ａの上面に載置させる。
このとき、梁部材２の荷重は左右の受け鉄骨４を介して段梁１の最上段部１Ａに受け止められる。又、段梁１における最上段部１Ａの側面と梁部材２における梁部分２Ａの梁端面との間には、作業者の手が入る程度の隙間が形成されている。
In the beam member placement process, as shown in Figures 1 to 3, the hook of a lifting machine such as a crane (not shown) is attached to the sling portion 4A provided on each supporting steel frame 4 via a sling wire rope 6 or the like, and then the beam member 2 together with the supporting steel frame 4 is lifted by the lifting machine up to above the uppermost portion 1A of the step beam 1, and the beam portion 2A of the beam member 2 is positioned between the uppermost portions 1A of the step beam 1 so that one end of each supporting steel frame 4 extending from the beam end of the lifted beam member 2 is placed on the upper surface of the uppermost portion 1A of the step beam 1, and one end of each supporting steel frame 4 together with the protruding portion 2Ba of the handrail portion 2B is placed on the upper surface of the uppermost portion 1A of the step beam 1.
At this time, the load of the beam member 2 is received by the uppermost portion 1A of the step beam 1 via the left and right supporting steel frames 4. In addition, a gap large enough for a worker to put his/her hand in is formed between the side surface of the uppermost portion 1A of the step beam 1 and the end face of the beam portion 2A of the beam member 2.
梁部材架設工程においては、先ず、図２に示すように、前述した最上段部１Ａの側面と梁部分２Ａの梁端面との隙間を利用して、梁部材２の梁部分２Ａに内蔵された各機械式継手２２のスリーブ２２Ａを梁部分２Ａから引き出して、対向する段梁１の最上段部１Ａの側面に形成された凹部１２に挿入するとともに最上段部１Ａの鉄筋１１に嵌合して、梁部材２の各主筋２１を最上段部１Ａの各鉄筋１１に機械式継手２２を介して接合する。その後、前述した最上段部１Ａの側面と梁部分２Ａの梁端面との隙間に硬化性充填材３を充填して、段梁１の最上段部１Ａと梁部材２の梁部分２Ａとを一体化させる。そして、段梁１の最上段部１Ａと梁部材２の梁部分２Ａとを一体化させた後に、図４に示すように、各受け鉄骨４を梁部材２の梁端部から撤去して受け鉄骨４の再利用を可能にする。 In the beam member erection process, first, as shown in Figure 2, the sleeves 22A of each mechanical joint 22 built into the beam portion 2A of the beam member 2 are pulled out of the beam portion 2A using the gap between the side of the topmost section 1A and the end face of the beam portion 2A. They are then inserted into the recesses 12 formed in the side of the topmost section 1A of the opposing step beam 1 and fitted into the reinforcing bars 11 in the topmost section 1A, joining each main reinforcement 21 of the beam member 2 to each reinforcing bar 11 in the topmost section 1A via the mechanical joints 22. Next, the gap between the side of the topmost section 1A and the end face of the beam portion 2A is filled with hardenable filler 3, thereby integrating the topmost section 1A of the step beam 1 with the beam portion 2A of the beam member 2. Then, after the topmost section 1A of the step beam 1 and the beam section 2A of the beam member 2 are integrated, as shown in Figure 4, each supporting steel frame 4 can be removed from the beam end of the beam member 2, allowing the supporting steel frame 4 to be reused.
つまり、この梁部材２の架設方法によると、受け鉄骨取り付け工程において、各受け鉄骨４が、その底面が梁部材２の梁部分２Ａと手摺り部２Ｂとの境界に位置する状態で梁部材２の梁端部に取り付けられていることから、梁部材配置工程において、各受け鉄骨４の一端部を段梁１の最上段部１Ａの上面に載置すると、梁部材２の梁部分２Ａが段梁１の最上段部１Ａ間に位置するとともに、手摺り部２Ｂの両張出部分２Ｂａが段梁１の最上段部１Ａの上面にて受け止め支持された状態になり、これにより、梁部材２を、その各梁端部側が受け鉄骨４と張出部分２Ｂａとを介して段梁１の最上段部１Ａに二点支持された安定状態で、段梁１間に適正に配置することができ、これにより、梁部材架設工程においては、梁部材２の梁部分２Ａが段梁１の最上段部１Ａ間に配置され、かつ、梁部材２の手摺り部２Ｂが段梁１の最上段部１Ａ間の上側に配置された適正な状態で、梁部材２を段梁１間に架設することができる。 In other words, according to this beam member 2 installation method, in the support steel frame installation process, each support steel frame 4 is attached to the end of the beam member 2 with its bottom surface positioned at the boundary between the beam portion 2A and the handrail portion 2B of the beam member 2. Therefore, when one end of each support steel frame 4 is placed on the top surface of the uppermost portion 1A of the step beam 1 in the beam member placement process, the beam portion 2A of the beam member 2 is positioned between the uppermost portions 1A of the step beam 1, and both protruding portions 2Ba of the handrail portion 2B are positioned on the top surface of the uppermost portion 1A of the step beam 1. This allows the beam member 2 to be properly positioned between the step beams 1 in a stable state, with each beam end supported at two points by the support steel frame 4 and the protruding portion 2Ba to the topmost portion 1A of the step beam 1.As a result, during the beam member erection process, the beam portion 2A of the beam member 2 is positioned between the topmost portions 1A of the step beams 1, and the handrail portion 2B of the beam member 2 can be properly positioned above the topmost portions 1A of the step beams 1, allowing the beam member 2 to be erected between the step beams 1.
しかも、受け鉄骨取り付け工程において、各受け鉄骨４が、梁部材２の梁部分２Ａと手摺り部２Ｂとの境界における梁部材２の梁幅方向での重量の均衡を保つバランス位置に取り付けられていることから、各受け鉄骨４を利用して梁部材２をクレーンなどの揚重機で揚重するときの梁部材２の揚重姿勢や、各受け鉄骨４の一端部を段梁１の最上段部１Ａの上面に載置して梁部材２を段梁１間に配置したときの梁部材２の配置姿勢を、梁部材２を段梁１間に架設するのに適した姿勢に安定性良く維持し易くなる。 Furthermore, during the support steel frame installation process, each support steel frame 4 is installed in a balanced position that maintains weight balance in the beam width direction of the beam member 2 at the boundary between the beam portion 2A and the handrail portion 2B of the beam member 2. This makes it easier to stably maintain the lifting position of the beam member 2 when the beam member 2 is lifted with a crane or other lifting equipment using each support steel frame 4, and the position of the beam member 2 when one end of each support steel frame 4 is placed on the top surface of the top section 1A of the step beam 1 and the beam member 2 is positioned between the step beams 1, in a position suitable for erecting the beam member 2 between the step beams 1.
そして、梁部材２を段梁１間に架設した後は、各受け鉄骨４が梁部材２から撤去されることで、他の梁部材２を段梁１間に架設するときの受け鉄骨取り付け工程においては、撤去した受け鉄骨４を再利用することができる。 After the beam members 2 are installed between the step beams 1, each supporting steel frame 4 is removed from the beam members 2, allowing the removed supporting steel frames 4 to be reused in the supporting steel frame installation process when installing other beam members 2 between the step beams 1.
その結果、梁部分２Ａにおける梁幅方向の一端部から立上がる手摺り部２Ｂを備えることで重量バランスが低下した梁部材２を、段梁１間に適正な状態で容易に架設することができる。又、受け鉄骨４の装備数を削減することによる部材管理の容易化や鋼材費の削減などを図ることができる。 As a result, by providing a handrail section 2B rising from one end of the beam section 2A in the beam width direction, the beam member 2, which has an unbalanced weight, can be easily erected in an appropriate state between the step beams 1. Furthermore, by reducing the number of supporting steel frames 4, component management can be simplified and steel costs can be reduced.
〔別実施形態〕
本発明の別実施形態について説明する。
尚、以下に説明する各別実施形態の構成は、それぞれ単独で適用することに限らず、上記の実施形態や他の別実施形態の構成と組み合わせて適用することも可能である。
[Another embodiment]
Another embodiment of the present invention will now be described.
The configurations of the other embodiments described below are not limited to being applied alone, but can also be applied in combination with the configurations of the above-described embodiment or other other embodiments.
（１）上記の実施形態においては、受け鉄骨取り付け工程にて各受け鉄骨４を梁部材２の上下中間部位に取り付ける場合に、各受け鉄骨４の底面が梁部分２Ａの上面に載置された状態で取り付けられるものを例示したが、これに限らず、例えば、各受け鉄骨４の底面が梁部材２の梁部分２Ａと立上り部（手摺り部）２Ｂとの境界に位置するように、各受け鉄骨４の側面が立上り部２Ｂの下部に取り付けられるものであってもよい。 (1) In the above embodiment, when each support steel frame 4 is attached to the middle portion of the beam member 2 between the top and bottom in the support steel frame attachment process, the bottom surface of each support steel frame 4 is attached while resting on the top surface of the beam portion 2A. However, this is not limited to this. For example, the side surface of each support steel frame 4 may be attached to the bottom of the rising portion 2B so that the bottom surface of each support steel frame 4 is located at the boundary between the beam portion 2A of the beam member 2 and the rising portion (handrail portion) 2B.
（２）上記の実施形態においては、受け鉄骨取り付け工程にて各受け鉄骨４を梁部材２の梁端部に取り外し可能に取り付け、梁部材架設工程にて段梁１と梁部材２とを一体化させた後に各受け鉄骨４を梁部材２の梁端部から撤去して再利用するものを例示したが、これに限らず、例えば、各受け鉄骨４を梁部材２の梁端部から撤去せずにそのままの状態で残すものであってもよく、又、各受け鉄骨４を梁部材２の梁端部から撤去せずに後打ちコンクリートで覆い隠すものであってもよい。 (2) In the above embodiment, the support steel frames 4 are removably attached to the beam end of the beam member 2 in the support steel frame installation process, and after the step beam 1 and the beam member 2 are integrated in the beam member erection process, the support steel frames 4 are removed from the beam end of the beam member 2 and reused. However, this is not limited to this. For example, the support steel frames 4 may be left in their original state without being removed from the beam end of the beam member 2, or the support steel frames 4 may be covered with post-cast concrete without being removed from the beam end of the beam member 2.
１ 架設対象部材（段梁）
２ 梁部材
２Ａ 梁部分
２Ｂ 立上り部（手摺り部）
４ 受け鉄骨
1. Erection target member (beam)
2 Beam member 2A Beam portion 2B Rising portion (handrail portion)
4. Support steel frame
Claims (3)
前記梁部材の梁端部に受け鉄骨をその一端部が前記梁部材の梁端部から前記梁部材の架設方向に張り出す状態で取り付ける受け鉄骨取り付け工程と、
前記受け鉄骨の一端部が前記架設対象部材の上面に載置されるように前記梁部材を前記架設対象部材間に配置する梁部材配置工程と、
前記梁部材の梁端部を前記架設対象部材の側面に接合して前記梁部材を前記架設対象部材間に架設する梁部材架設工程と、が備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨が、前記梁部材の上下中間部位に配置された状態で、前記梁部材の梁端部に取り外し可能に取り付けられ、
前記梁部材架設工程においては、前記梁部材の梁端部を前記架設対象部材の側面に接合した後に、前記受け鉄骨が前記梁部材の梁端部から撤去される梁部材の架設方法。 A beam member installation method for installing a beam member between a plurality of installation target members, the beam member being disposed between the installation target members, comprising:
a support steel frame installation process for installing a support steel frame to the beam end of the beam member in a state in which one end of the support steel frame protrudes from the beam end of the beam member in the erection direction of the beam member;
a beam member arranging step of arranging the beam member between the members to be erected so that one end of the supporting steel frame is placed on an upper surface of the member to be erected;
a beam member erection process of joining the beam end portions of the beam members to the side surfaces of the erection target members to erect the beam members between the erection target members,
In the support steel frame attaching step, the support steel frame is removably attached to the beam end of the beam member in a state where it is arranged in the upper and lower intermediate portion of the beam member,
In the beam member erection process, the beam end of the beam member is joined to the side of the member to be erected, and then the supporting steel frame is removed from the beam end of the beam member .
前記受け鉄骨取り付け工程においては、前記受け鉄骨の底面が前記梁部分と前記立上り部との境界に位置する状態で前記受け鉄骨が前記梁部材の上下中間部位に取り付けられる請求項１に記載の梁部材の架設方法。 The beam member includes a beam portion disposed between the installation target members and a rising portion rising from one end of the beam portion in the beam width direction,
A method for erecting a beam member as described in claim 1, wherein in the supporting steel frame installation process, the supporting steel frame is installed at the upper and lower middle positions of the beam member with the bottom surface of the supporting steel frame positioned at the boundary between the beam portion and the rising portion.
前記梁部材の梁端部に受け鉄骨をその一端部が前記梁部材の梁端部から前記梁部材の架設方向に張り出す状態で取り付ける受け鉄骨取り付け工程と、
前記受け鉄骨の一端部が前記架設対象部材の上面に載置されるように前記梁部材を前記架設対象部材間に配置する梁部材配置工程と、
前記梁部材の梁端部を前記架設対象部材の側面に接合して前記梁部材を前記架設対象部材間に架設する梁部材架設工程と、が備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨が、前記梁部材の上下中間部位に配置された状態で、前記梁部材の梁端部に取り付けられ、
前記梁部材には、前記架設対象部材間に配置される梁部分と当該梁部分における梁幅方向の一端部から立上がる立上り部とが備えられ、
前記受け鉄骨取り付け工程においては、前記受け鉄骨の底面が前記梁部分と前記立上り部との境界に位置する状態で、前記受け鉄骨が、前記梁部材の上下中間部位で、かつ、前記梁部分と前記立上り部との境界における梁幅方向の中央よりも前記立上り部側に偏倚した梁幅方向のバランス位置に取り付けられる梁部材の架設方法。 A beam member installation method for installing a beam member between a plurality of installation target members, the beam member being disposed between the installation target members,
a support steel frame installation process for installing a support steel frame to the beam end of the beam member in a state in which one end of the support steel frame protrudes from the beam end of the beam member in the erection direction of the beam member;
a beam member arranging step of arranging the beam member between the members to be erected so that one end of the supporting steel frame is placed on an upper surface of the member to be erected;
a beam member erection process of joining the beam end portions of the beam members to the side surfaces of the erection target members to erect the beam members between the erection target members,
In the supporting steel frame attaching step, the supporting steel frame is attached to the beam end of the beam member in a state where it is arranged in the upper and lower intermediate portion of the beam member,
The beam member includes a beam portion disposed between the installation target members and a rising portion rising from one end of the beam portion in the beam width direction,
In the supporting steel frame installation process, the bottom surface of the supporting steel frame is positioned at the boundary between the beam portion and the rising portion, and the supporting steel frame is installed at the middle part of the beam member between the top and bottom, at a balanced position in the beam width direction that is biased toward the rising portion side rather than the center of the beam width direction at the boundary between the beam portion and the rising portion.This is a method of erecting a beam member.
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| US20020062616A1 (en) | 2000-11-28 | 2002-05-30 | Ocampo Manuel Jamir S. | Modular building connector system |
| JP2005264607A (en) | 2004-03-19 | 2005-09-29 | Nippon Kaiser Kk | Construction method of overpass slab and precast concrete plate for overhang slab |
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| JP2523891Y2 (en) * | 1989-07-04 | 1997-01-29 | 大成建設株式会社 | Connection structure between girders and steel beams |
| JPH0813424A (en) * | 1994-07-04 | 1996-01-16 | Ishikawajima Constr Materials Co Ltd | Masonry door sill of subbase and construction method for subbase end |
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| US20020062616A1 (en) | 2000-11-28 | 2002-05-30 | Ocampo Manuel Jamir S. | Modular building connector system |
| JP2005264607A (en) | 2004-03-19 | 2005-09-29 | Nippon Kaiser Kk | Construction method of overpass slab and precast concrete plate for overhang slab |
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