JPS6119767B2

JPS6119767B2 -

Info

Publication number: JPS6119767B2
Application number: JP52080379A
Authority: JP
Inventors: Naoki Chinnai; Shunosuke Aoki
Original assignee: Aoki Construction Co Ltd
Current assignee: Aoki Construction Co Ltd
Priority date: 1977-07-07
Filing date: 1977-07-07
Publication date: 1986-05-19
Also published as: JPS5415309A

Description

【発明の詳細な説明】本発明は圧力水の噴射を併用するウオータジエ
ツト式ペーパードレン打込工法およびその打込シ
ユーに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterjet type paper drain driving method that uses pressurized water jetting and its driving shoe.

ペーパードレンによる改良の対象となる土質
は、Ｎ値が０〜３程度の超軟弱なシルト、クレ
イ、又は腐食土層である。しかし改良対象層が必
ずしも地下深部より地表まで連つて存在するので
はなく、途中に硬い砂層を挾んだり、上部に硬い
ローム層がある場合等、かなり複雑な様相を呈す
ることが多い。このような場所にペーパードレン
を打込むには、硬い地層を打抜く必要があるが、
従来のペーパードレン打込装置はもともと軟弱な
地層を対象とした構造であるため、せいぜいＮ値
が５〜６程度で、厚さ約１ｍの砂層を打抜くのが
やつとであつた。 The soil to be improved by the paper drain is an ultra-soft silt, clay, or rotten soil layer with an N value of about 0 to 3. However, the layer to be improved does not necessarily extend from deep underground to the surface, and often presents a rather complex pattern, such as when there is a hard sand layer in between or a hard loam layer at the top. In order to drive a paper drain into such a place, it is necessary to punch through the hard stratum.
Conventional paper drain driving equipment is originally designed for soft strata, so it has an N value of about 5 to 6 at most, and is capable of punching through a sand layer about 1 meter thick.

本発明は従来不可能であつたＮ値が20〜30程度
の硬砂層、ローム層等を打抜いて軟弱層までペー
パードレンを打設することがペーパードレン打込
工法およびそれに使用する打込シユーを提供する
ことにより、ペーパードレン工法の適用範囲を大
巾に拡張することを目的とするものである。 The present invention is capable of punching out hard sand layers, loam layers, etc. with an N value of about 20 to 30 and driving paper drains to soft layers, which was previously impossible. The purpose of this project is to greatly expand the scope of application of the paper drain method.

以下図面につき本発明実施の態様を説明する。
図中１はペーパードレンを打設すべき地盤、図中
１ａは比較的硬質の砂層、１ｂは比較的軟質のシ
ルト層、２は地盤１上に敷設したレール、３は枕
木、４はドレンボード、５はペーパードレン打込
装置の台車、６はその車輪、７は台車５上に植立
した櫓、８は櫓７内に昇降自在に設けた管状のペ
ーパードレン打込杆、９は打込杆８の下端に連結
した打込シユー、１０はドレンボード４のリー
ル、１１はドレンボード４のガイドローラ、１２
は打込杆８の昇降駆動用エンジン、１３は減速
機、１４は駆動用スプロケツト、１５は打込杆８
を挾持するフリクシヨンローラ、１６は各ローラ
１５と一体のスプロケツト、１７はガイドスプロ
ケツト、１８は各スプロケツト１４，１６，１７
にかけ渡したチエン、１９は打込杆８の上端に設
けたスイベル、２０はこのスイベル１９と接続し
た圧力水送給用ホース、２１はこのホース２０の
リール、２２は圧力水供給装置用の台車、２３は
その車輪、２４は台車５と台車２２との連結器、
２５は台車２２上に塔載した水タンク、２６はこ
の水タンク２５上に設置した高圧ポンプ、２７は
このポンプ２６のサクシヨンホース、２８はデリ
ベリーホースで前記リール２１の中心に接続して
ある。２９は高圧ポンプ２６の駆動用原動機であ
る。 Embodiments of the present invention will be described below with reference to the drawings.
In the figure, 1 is the ground where the paper drain is to be installed, 1a is a relatively hard sand layer, 1b is a relatively soft silt layer, 2 is the rail laid on the ground 1, 3 is a sleeper, and 4 is a drain board , 5 is a trolley of the paper drain driving device, 6 is its wheel, 7 is a turret installed on the trolley 5, 8 is a tubular paper drain driving rod installed in the turret 7 so that it can be raised and lowered, and 9 is a driving rod. A driving shoe connected to the lower end of the rod 8, 10 a reel of the drain board 4, 11 a guide roller of the drain board 4, 12
13 is a reduction gear, 14 is a driving sprocket, and 15 is a driving rod 8.
16 is a sprocket integrated with each roller 15, 17 is a guide sprocket, 18 is each sprocket 14, 16, 17
19 is a swivel provided at the upper end of the driving rod 8, 20 is a pressure water supply hose connected to this swivel 19, 21 is a reel for this hose 20, and 22 is a cart for the pressure water supply device. , 23 is the wheel thereof, 24 is a coupler between the truck 5 and the truck 22,
25 is a water tank mounted on a cart 22, 26 is a high pressure pump installed on this water tank 25, 27 is a suction hose of this pump 26, and 28 is a delivery hose connected to the center of the reel 21. be. 29 is a prime mover for driving the high pressure pump 26.

また第２図〜第４図は本発明において使用する
各種の打込シユーを示すものである。 Further, FIGS. 2 to 4 show various driving shoes used in the present invention.

第２図の打込シユー９′は、管状の打込杆８の
先端とねじ３０ａを介して着脱自在に接続し得る
軸筒部３０に、三味線の撥状のプレート３１を一
体に結合し、このプレート３１の先端面３１ａの
両側にそれぞれ突起３１ｂを設け、前記軸筒部３
０の中空部に連通すると共に、プレート３１の先
端面３１ａに開口する圧力水孔３２を設けたもの
である。 The driving shoe 9' shown in FIG. 2 has a shamisen plucked plate 31 integrally connected to a shaft cylinder portion 30 which can be detachably connected to the tip of a tubular driving rod 8 via a screw 30a. Protrusions 31b are provided on both sides of the tip surface 31a of this plate 31, and the shaft cylinder portion 3
A pressurized water hole 32 is provided which communicates with the hollow portion of the plate 31 and which opens at the distal end surface 31a of the plate 31.

第３図の打込シユー９″は、管状の打込杆８の
先端とねじ３０ａを介して着脱自在に接続し得る
軸筒部３０に、楔状のプレート３３を一体に結合
し、前記軸筒部３０の中空部に連通すると共に、
プレート３３の先端部３３ａおよび両側斜面３３
ｂにそれぞれ開口する圧力水孔３４を設けたもの
である。なお両側斜面３３ｂに開口する圧力水孔
３４の開口部はねじ孔とし、不要の時はねじ３５
を螺合するようにしておくとよい。 The driving shoe 9'' shown in FIG. 3 has a wedge-shaped plate 33 integrally connected to a shaft cylinder portion 30 which can be detachably connected to the tip of a tubular driving rod 8 via a screw 30a. While communicating with the hollow part of the part 30,
Tip 33a of plate 33 and both side slopes 33
A pressure water hole 34 is provided which opens at each of the holes b. Note that the opening of the pressure water hole 34 that opens on both side slopes 33b is a screw hole, and when it is not necessary, the opening of the pressure water hole 34 is a screw hole.
It is best to screw them together.

また第４図の打込シユー９は、管状の打込杆
８の先端とねじ３０ａを介して着脱自在に接続し
得る軸筒部３０に、ドレンボード４を折り曲げて
掛止し得る矩形状のプレート３６を一体に結合
し、このプレート３６の両側に棒状のドレンボー
ドガイドロツド３７を先端がプレート３６の先端
面より突出するように設け、前記軸筒部３０の中
空部に連通すると共に、ガイドロツド３７の先端
部にそれぞれ開口する圧力水孔３８を設けたもの
である。なお圧力水孔３８の開口部に座ぐり状の
凹陥部３９を形成しておくと開口部が土砂によつ
て閉塞されるのを防ぐことができる。 The driving shoe 9 in FIG. 4 has a rectangular shape on which the drain board 4 can be bent and hooked to a shaft tube portion 30 that can be detachably connected to the tip of a tubular driving rod 8 via a screw 30a. A plate 36 is integrally connected, and bar-shaped drain board guide rods 37 are provided on both sides of the plate 36 so that their tips protrude from the front end surface of the plate 36, communicating with the hollow portion of the shaft cylinder portion 30, Pressure water holes 38 are provided at the tips of the guide rods 37, respectively. Note that if a counterbore-like recess 39 is formed at the opening of the pressure water hole 38, the opening can be prevented from being blocked by earth and sand.

つぎに上述の装置を使用する本発明工法を説明
する。まず、第１図の装置の打込杆８の下端に、
第２図に示す打込シユー９′を連結する。この場
合は最初、圧力水を打込シユー９′の先端部３１
ａより噴射しつつ打込杆８を駆動装置により押し
下げることにより、一旦地盤１を所望の深さまで
穿孔する。その後、打込杆８を引き抜いてから、
今度は圧力水を止めた状態のシユー９′の先端面
３１ａに、ドレンボード４の先端部を折り曲げて
掛け止めし、再び打込杆８を前の穿孔に沿つて地
地中に押し込む。このようにすると従来打設不可
能であつた硬い地盤に対してもドレンボード４の
打設が可能となる。 Next, the construction method of the present invention using the above-mentioned device will be explained. First, at the lower end of the driving rod 8 of the device shown in FIG.
The driving shoe 9' shown in FIG. 2 is connected. In this case, first, pressurized water is applied to the tip 31 of the shoe 9'.
By pushing down the driving rod 8 with the drive device while injecting from the point a, the ground 1 is once drilled to a desired depth. After that, after pulling out the driving rod 8,
This time, the tip of the drain board 4 is bent and latched onto the tip surface 31a of the shoe 9' with the pressure water turned off, and the driving rod 8 is again pushed into the ground along the previous hole. In this way, the drain board 4 can be placed even on hard ground, which was conventionally impossible.

またより硬い地盤に対しては、第３図に示す打
込シユー９″を打込杆８の下端に接続して、圧力
水孔３４を介して圧力水を噴射しつつ打込杆８を
所望の深さまで押し込む。この場合シユー９″の
プレート３３は楔状に先端部が鋭角に形成されて
いるため、圧力水の噴射効果と相俟つて硬い地盤
に対しても容易に穿孔することができる。なおこ
の際、プレート３３の両側斜面３３ｂに設けた圧
力水孔３４の開口より圧力水を噴射する必要のな
い時はねじ３５を螺合してこの開口を閉塞し、先
端部３３ａの開口のみから圧力水を噴射すればよ
い。 In addition, for harder ground, a driving shoe 9'' shown in FIG. In this case, the plate 33 of the shoe 9'' is formed in a wedge shape with an acute angle, so that, together with the jetting effect of pressurized water, it is possible to easily drill even in hard ground. At this time, when there is no need to inject pressurized water from the openings of the pressure water holes 34 provided on both side slopes 33b of the plate 33, the screws 35 are screwed together to close these openings, and only from the openings of the tip 33a. All you have to do is spray pressurized water.

穿孔が終つたならば圧力水を止め、打込杆８を
一旦引き上げた後、シユー９″を打込杆８から外
し、従来型のシユー９、または第２図のシユー
９′のようなドレンボード打込用のシユーを打込
杆８に取付け、前記したようにドレンボード４を
地中に打込む。 Once the drilling is completed, turn off the pressure water, pull up the driving rod 8 once, remove the shoe 9'' from the driving rod 8, and connect it to a drain such as a conventional shoe 9 or the shoe 9' shown in Fig. 2. A shoe for driving the board is attached to the driving rod 8, and the drain board 4 is driven into the ground as described above.

また第４図に示す打込シユー９を打込杆８の
下端に接続した場合は、はじめからプレート３６
にドレンボード４の先端部を折り曲げて掛止し、
ドレンボード４の両側に設けたガイドロツド３７
の圧力水孔３８を介して圧力水を噴射しつつ打込
杆８を地中に押し下げることにより、地盤を穿孔
すると同時にドレンボード４を地中に打込む。こ
の場合シユー９″の両側のガイドロツド３７はプ
レート３６の先端面より下方に突出しているた
め、プレート３６の先端に折り曲げて掛止したド
レンボード４がプレート３６の左右にずれてプレ
ート３６からの外れを防止すると共に、ロツド先
端部より噴射する圧力水によつて穿孔を容易にす
る作用を有している。 In addition, when the driving shoe 9 shown in FIG. 4 is connected to the lower end of the driving rod 8, the plate 36
Bend the tip of the drain board 4 and hang it.
Guide rods 37 provided on both sides of the drain board 4
By pushing down the driving rod 8 into the ground while injecting pressurized water through the pressure water hole 38, the drain board 4 is driven into the ground at the same time as the ground is bored. In this case, since the guide rods 37 on both sides of the shoe 9'' protrude downward from the tip of the plate 36, the drain board 4, which is bent and hooked to the tip of the plate 36, shifts to the left and right of the plate 36 and comes off the plate 36. It has the function of preventing the drilling and facilitating the drilling by the pressurized water jetted from the tip of the rod.

実施例圧力水の噴射を伴わない従来型の打込シユー、
および本発明に係る前記３種類の打込シユー
９′，９″，９を使用して千葉県野田市中里にお
いて実験を行つた。Example Conventional driving shoe without pressure water injection,
Experiments were conducted in Nakazato, Noda City, Chiba Prefecture, using the three types of driving shoes 9', 9'', and 9 according to the present invention.

使用打込機：株式会社青木建設製 PDW159型打込力：０〜4ton 使用水圧：20Kg／cm² 使用水量：20／min 上記条件によつて地表下７ｍ以下にあるＮ値15
〜45の緊つた砂層を地表下７〜10ｍの３ｍに亘つ
て打抜き作業を実施した。 Driving machine used: PDW159 model manufactured by Aoki Construction Co., Ltd. Driving force: 0 to 4 tons Water pressure used: 20Kg/ ^cm2 Water consumption: 20/min Based on the above conditions, N value 15 below 7m below the ground surface
The punching operation was carried out in ~45 tight sand layers over a distance of 3 m, 7 to 10 m below the surface.

第５図はその結果を示したものである。Ａは従
来型の打込シユーを使用した場合で、図から明ら
かなように圧力水の噴射を行わなければ打抜き不
能であつた、Ｂは打込シユー９′を使用した場合
であり、Ｃは打込シユー９″を使用した場合であ
り、Ｄは打込シユー９を使用した場合であり、
いずれも３分以内で打抜くことができた。 FIG. 5 shows the results. A is a case where a conventional driving shoe was used, and as is clear from the figure, punching was not possible without injection of pressurized water, B is a case where a driving shoe 9' was used, and C is a case where a driving shoe 9' was used. D is the case when the driving shoe 9'' is used, and D is the case when the driving shoe 9 is used.
I was able to punch through both within 3 minutes.

上記結果から本発明が有効であることがわか
る。そして本発明は砂層の他、大きな礫を含まな
いローム層や固結シルト層に使用しても有効であ
る。 The above results show that the present invention is effective. In addition to sand layers, the present invention is also effective for use in loam layers and consolidated silt layers that do not contain large gravel.

上述の如く本発明によれば従来不可能であつた
硬い地層に対してもドレンボードの打込みが可能
となるため、本発明はペーパードレン打込工法の
適用範囲を大巾に拡張できるというすぐれた効果
がある。 As mentioned above, according to the present invention, it is possible to drive a drain board into hard strata, which was previously impossible, so the present invention has the advantage of greatly expanding the scope of application of the paper drain driving method. effective.

[Brief explanation of the drawing]

第１図はペーパードレン打込装置の立面図、第
２図〜第４図は本発明に係る各種打込シユーを示
すもので、ａは平面図、ｂは正面図、ｃは側面
図、第５図は本発明の実験結果を示す図である。１……地盤、２……レール、４……ドレンボー
ド、５……台車、７……櫓、８……ペーパードレ
ン打込杆、９……打込シユー、１０……リール、
１２……エンジン、１５……フリクシヨンロー
ラ、１９……スイベル、２０……圧力水送給用ホ
ース、２１……リール、２２……台車、２５……
水タンク、２６……高圧ポンプ、２７……サクシ
ヨンホース、２８……デリベリーホース、２９…
…原動機、９′，９″，９……本発明に係る打込
シユー、３０……軸筒部、３１……撥状のプレー
ト、３１ａ……先端面、３１ｂ……突起、３２…
…圧力水孔、３３……楔状のプレート、３３ａ…
…先端部、３３ｂ……両側斜面、３４……圧力水
孔、３５……ねじ、３６……矩形状のプレート、
３７……ドレンボードガイドロツド、３８……圧
力水孔、３９……凹陥部。 FIG. 1 is an elevational view of a paper drain driving device, and FIGS. 2 to 4 show various driving shoes according to the present invention, in which a is a plan view, b is a front view, and c is a side view. FIG. 5 is a diagram showing experimental results of the present invention. 1... Ground, 2... Rail, 4... Drain board, 5... Dolly, 7... Yagura, 8... Paper drain driving rod, 9... Driving shoe, 10... Reel,
12... Engine, 15... Friction roller, 19... Swivel, 20... Pressure water supply hose, 21... Reel, 22... Dolly, 25...
Water tank, 26... High pressure pump, 27... Suction hose, 28... Delivery hose, 29...
...Prime mover, 9', 9'', 9...Driving shoe according to the present invention, 30...Shaft tube portion, 31...Plastic plate, 31a...Tip surface, 31b...Protrusion, 32...
...Pressure water hole, 33...Wedge-shaped plate, 33a...
... Tip part, 33b ... Both side slopes, 34 ... Pressure water hole, 35 ... Screw, 36 ... Rectangular plate,
37...Drain board guide rod, 38...Pressure water hole, 39...Recessed portion.

Claims

[Scope of Claims] 1. When a drain board is installed using a paper drain driving device that presses a paper drain driving rod into the ground from the ground using a power drive, the paper drain driving rod is formed into a tubular shape, and the hollow A water jet type paper drain driving shoe having a pressure water hole at the tip is attached to the lower end of the paper drain driving rod, so that pressure water is introduced from a pressure water supply device installed externally to the part, and the pressure of this shoe is While injecting pressurized water from the water hole, penetrate the driving rod to the depth at which the drain board is to be installed, and then pull it out. Then, hook the drain board to the shoe or the replaced shoe, and use the driving rod to drain the drain. A water jet type paper drain driving method characterized by driving boards into the ground. 2. When installing a drain board using a paper drain driving device that presses a paper drain driving rod into the ground from the ground using a power drive, the paper drain driving rod is formed into a tubular shape and is installed externally in this hollow part. A waterjet type paper drain driving shoe, which is designed to lead pressure water from a pressure water supply device and has a pressure water hole at the tip and a drain board hooking part, is attached to the lower end of the paper drain driving rod. By hooking the drain board to the shoe and press-fitting the paper drain driving rod into the ground while injecting pressurized water from the pressure water hole, the ground is perforated and at the same time the drain board is inserted by the driving rod. A water jet type paper drain driving method that is characterized by being driven into the ground. 3. A repellent plate is integrally connected to a shaft cylinder part that can be connected to the tip of a tubular driving rod that supplies pressurized water,
A waterjet type paper drain driving shoe comprising projections on both sides of the front end surface of the plate, and a pressure water hole that communicates with the inside of the cylindrical shaft and opens at the front end surface of the plate. 4. A wedge-shaped plate is integrally connected to a shaft cylinder part that can be connected to the tip of a tubular driving rod that supplies pressurized water,
A waterjet type paper drain driving shoe comprising pressurized water holes that communicate with the inside of the shaft cylinder and open at the tip and both side slopes of the plate. 5 A plate on which the tip of the drain board can be bent and hooked is integrally connected to a shaft tube that can be connected to the tip of a tubular driving rod that feeds pressurized water, and rod-shaped drain boards are attached on both sides of this plate. A waterjet type paper drain comprising a guide rod with a tip thereof protruding from the front end surface of the plate, communicating with the inside of the cylindrical shaft portion, and pressure water holes opening at each tip of the drain board guide rod. Input show.