JP5635383B2 - Existing pile position adjustment jig - Google Patents

Existing pile position adjustment jig Download PDF

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JP5635383B2
JP5635383B2 JP2010275251A JP2010275251A JP5635383B2 JP 5635383 B2 JP5635383 B2 JP 5635383B2 JP 2010275251 A JP2010275251 A JP 2010275251A JP 2010275251 A JP2010275251 A JP 2010275251A JP 5635383 B2 JP5635383 B2 JP 5635383B2
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JP2012122284A (en
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北村　精男
北村　　精男
孝宗 森脇
孝宗 森脇
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Description

本発明は、締切杭の両側に位置する既設杭の位置調整治具に関する。   The present invention relates to a position adjusting jig for an existing pile located on both sides of a cutoff pile.

鋼矢板や鋼管矢板等の杭を複数連続して地盤に圧入することによって連続壁を形成する技術が知られている。この連続壁は、例えば、土砂などの崩落を防ぐ土留め壁や、河川の護岸壁などに用いられている。
特許文献１には、複数の杭を接続しながら地中に連続して打設し、これら複数の杭で形成された連続壁によって締め切られた空間を利用して、地下施設を構築する技術が記載されている。
なお、杭の両端部には、この杭の長手方向に連続するとともに、隣接する杭の継手と係合しあう継手が設けられている。また、連続壁の形成は、杭の圧入・引き抜きを行う杭圧入引抜機によって杭を順次圧入するとともに、圧入される杭と既設杭とを、継手を介して連結することによって行われている。 A technique for forming a continuous wall by pressing a plurality of piles such as steel sheet piles and steel pipe sheet piles continuously into the ground is known. This continuous wall is used, for example, as a retaining wall that prevents collapse of earth and sand, a riverwall, and the like.
Patent Document 1 discloses a technology for constructing an underground facility using a space that is continuously placed in the ground while connecting a plurality of piles and is closed by a continuous wall formed by the plurality of piles. Have been described.
In addition, the both ends of the pile are provided with joints that are continuous in the longitudinal direction of the pile and engage with joints of adjacent piles. The continuous wall is formed by sequentially pressing the piles with a pile press-fitting and drawing machine that presses and pulls the piles, and connecting the press-fitted piles and the existing piles via joints.

特開２００６−０３７６１７号公報JP 2006-037617 A

ところで、上述のようにして連続壁を形成するにあたり、最後に圧入され、連続壁に囲まれた空間を締め切る杭（以下、締切杭と称する）の両側に位置する既設杭の施工精度や、該両側の既設杭の地中での変位等により、この締切杭をスムーズに圧入できない場合がある。このような場合は、過大な力をかけながら締切杭の圧入動作と引き抜き動作とを繰り返して行い、これに応じて、両側の既設杭の位置や傾き等を調整することにより、締切杭を地中に圧入していた。
ところが、過大な力をかけて締切杭を圧入すると、この締切杭の両端部に形成された継手に力が集中してしまい、変形したり、既設杭側の継手から外れたりする場合がある。 By the way, in forming the continuous wall as described above, the construction accuracy of the existing piles positioned on both sides of the pile (hereinafter referred to as the cut-off pile) that is finally press-fitted and closes the space surrounded by the continuous wall, Due to the displacement of the existing piles on both sides in the ground, etc., there are cases in which this deadlock pile cannot be pressed in smoothly. In such a case, repeat the press-fitting operation and pull-out operation of the cut-off pile while applying an excessive force, and adjust the position and inclination of the existing piles on both sides accordingly. It was press-fitted inside.
However, if an excessive force is applied to press-fit the cut-off pile, the force concentrates on the joints formed at both ends of the cut-off pile and may be deformed or detached from the existing pile-side joint.

本発明の課題は、締切杭の圧入時における継手の変形を確実に防ぎ、連続壁を確実に形成することが可能な既設杭の位置調整治具を提供することを目的とする。   An object of the present invention is to provide a position adjusting jig for an existing pile that can reliably prevent deformation of a joint during press-fitting of a cut-off pile and can form a continuous wall reliably.

請求項１に記載の発明は、連続壁を形成する複数の杭のうち、最後に地盤に圧入される締切杭の両側に位置するとともに継手を介して該締切杭と連結される既設杭の位置調整を行うための既設杭の位置調整治具であって、
前記締切杭の両端部に設けられた継手の圧入方向先端部に、下方に向かって突出するように取り付けられるとともに、前記両側の既設杭の締切杭側の継手にそれぞれ係合する一対の治具本体を備えており、
これら一対の治具本体は、それぞれ前記締切杭の両端部に設けられた継手の断面形状と略等しい断面形状を有するように設定されることによって、それぞれ前記両側の既設杭の締切杭側の継手に係合可能、かつ該締切杭側の継手の長さ方向に沿って摺動可能に形成されていることを特徴としている。 The invention according to claim 1 is the position of the existing pile that is located on both sides of the final pile to be press-fitted into the ground, and is connected to the final pile via a joint, among the plurality of piles that form the continuous wall. It is an existing pile position adjustment jig for adjusting,
Press-fitting direction leading end portion of the joint provided at both ends of the deadline piles, mounted so as to protrude downward Rutotomoni, a pair of jigs respectively engaging the deadlines pile side joint of the existing pile of the two side It has a tool body,
The pair of jig bodies are set so as to have a cross-sectional shape substantially equal to the cross-sectional shape of the joints provided at both ends of the cut-off pile , respectively, so that the joints on the cut-off pile side of the existing piles on the both sides respectively. And is slidable along the length direction of the joint on the side of the cutoff pile.

請求項２に記載の発明は、請求項１に記載の既設杭の位置調整治具において、
前記一対の治具本体には、前記両側の既設杭の締切杭側の継手に対する摺動を円滑にするための摺動円滑手段が設けられていることを特徴としている。 The invention according to claim 2 is the position adjustment jig of the existing pile according to claim 1,
The pair of jig bodies are provided with sliding smoothing means for smoothly sliding the existing piles on both sides with respect to the joint on the side of the cut-off pile.

本発明によれば、連続壁を形成する複数の杭のうち、最後に地盤に圧入される締切杭の両側に位置するとともに継手を介して該締切杭と連結される既設杭の位置調整を行うことができるので、締切杭の圧入時における継手の変形を確実に防ぎ、連続壁を確実に形成することが可能となる。   According to the present invention, among the plurality of piles that form the continuous wall, the position of the existing pile that is located on both sides of the final pile to be press-fitted into the ground and connected to the final pile through the joint is adjusted. Therefore, it is possible to reliably prevent deformation of the joint during press-fitting of the cut-off pile and to form the continuous wall with certainty.

（ａ）は複数の杭によって略円状に形成された連続壁の一例を示す平面図であり、（ｂ）は締切杭の両側に位置する既設杭間の間隔が狭い場合を説明する図であり、（ｃ），（ｄ）は既設杭が傾いている場合を説明する図であり、（ｅ）は隣り合う既設杭の間で法線のずれが生じている場合を説明する図である。(A) is a top view which shows an example of the continuous wall formed in the substantially circle shape by the several pile, (b) is a figure explaining the case where the space | interval between the existing piles located in the both sides of a deadline pile is narrow. (C), (d) is a figure explaining the case where the existing pile is inclined, (e) is a figure explaining the case where the shift | offset | difference of the normal line has arisen between adjacent existing piles. . 圧入機によって杭を圧入する状態を説明する図である。It is a figure explaining the state which press-fits a pile with a press-fitting machine. 圧入方向先端部に、本発明に係る既設杭の位置調整治具が取り付けられた締切杭の圧入時の状態を示しており、（ａ）は平面図であり、（ｂ）は正面図である。The state at the time of press-fitting of the cut-off pile in which the position adjusting jig of the existing pile according to the present invention is attached to the front end in the press-fitting direction is shown, (a) is a plan view, and (b) is a front view. . 掘削方向先端部に、本発明に係る既設杭の位置調整治具が取り付けられた先行施工機械の地盤掘削時の状態を示しており、（ａ）は平面図であり、（ｂ）は正面図である。The state at the time of ground excavation of the preceding construction machine in which the position adjusting jig of the existing pile according to the present invention is attached to the tip portion in the excavation direction is shown, (a) is a plan view, and (b) is a front view. It is. 本発明に係る既設杭の位置調整治具であり、（ａ）は一対の治具本体の一方を示す平断面図であり、（ｂ）は一対の治具本体の他方を示す平断面図である。It is the position adjustment jig of the existing pile which concerns on this invention, (a) is a plane sectional view which shows one side of a pair of jig main bodies, (b) is a plane sectional view which shows the other of a pair of jig main bodies. is there. 連続壁の一例を示す平面図であり、（ａ）は直線部であり、（ｂ）はコーナー部である。It is a top view which shows an example of a continuous wall, (a) is a linear part, (b) is a corner part.

以下、図面を参照して本発明の実施の形態について説明する。   Embodiments of the present invention will be described below with reference to the drawings.

＜第１の実施の形態＞
図１は連続壁１の一例を示す平面図である。本実施の形態の連続壁１は、例えば、土砂などの崩落を防ぐ土留め壁や、河川の護岸壁・止水壁などに用いられている。
この連続壁１は、複数の杭２，２…を連続して圧入するとともに、これら複数の杭２，２…を互いに連結することによって平面視略円状に形成されている。
また、複数の杭２，２…のうち、最後に地盤に圧入されるとともに、連続壁１に囲まれた空間を地盤から締め切る杭を締切杭２ａと称し、この締切杭２ａの両側に位置する杭を既設杭２ｂ，２ｂと称する。また、既設杭２ｂ，２ｂ間の間隙部１ａは、締切杭２ａの圧入予定箇所となっている。
また、これら複数の杭２，２…は、杭の圧入・引き抜きを行う杭圧入引抜機８によって地盤に圧入される。 <First Embodiment>
FIG. 1 is a plan view showing an example of the continuous wall 1. The continuous wall 1 of this Embodiment is used for the earth retaining wall which prevents collapse, such as earth and sand, the bank protection wall of a river, a water stop wall, etc., for example.
The continuous wall 1 is formed in a substantially circular shape in plan view by continuously press-fitting the plurality of piles 2, 2... And connecting the plurality of piles 2, 2.
Among the plurality of piles 2, 2..., The pile that is finally press-fitted into the ground and that closes the space surrounded by the continuous wall 1 from the ground is referred to as a cut-off pile 2a, and is located on both sides of the cut-off pile 2a. The piles are called existing piles 2b and 2b. Further, the gap 1a between the existing piles 2b and 2b is a place to be press-fitted into the cutoff pile 2a.
The plurality of piles 2, 2,.

なお、本実施の形態の連続壁１は平面視略円状に形成されたものであるが、これに限られるものではない。すなわち、例えば、図６（ａ）に示すような直線部１Ａや、図６（ｂ）に示すようなコーナー部１Ｂを有する平面視略矩形状の連続壁を始め、平面視略小判型の連続壁等、その他の形状の連続壁でもよく、適宜変更可能である。   In addition, although the continuous wall 1 of this Embodiment is formed in planar view substantially circular shape, it is not restricted to this. That is, for example, a continuous wall having a substantially rectangular shape in a plan view including a straight wall 1A as shown in FIG. 6A and a substantially rectangular continuous wall having a corner portion 1B as shown in FIG. 6B. Other shapes such as a wall may be used and can be changed as appropriate.

また、この連続壁１を形成する複数の杭２，２…（２ａ，２ｂ）として、本実施の形態ではハット型鋼矢板が採用されている。なお、本実施の形態の杭２（２ａ，２ｂ）はハット型鋼矢板を採用したが、これに限られるものではなく、例えばＵ字形鋼矢板等、その他の形状の鋼矢板を採用してもよい。   Further, in the present embodiment, a hat-type steel sheet pile is adopted as the plurality of piles 2, 2... (2a, 2b) that form the continuous wall 1. In addition, although the pile 2 (2a, 2b) of this Embodiment employ | adopted the hat-type steel sheet pile, it is not restricted to this, For example, you may employ | adopt steel sheet piles of other shapes, such as a U-shaped steel sheet pile. .

ハット型鋼矢板２（２ａ，２ｂ）は、鋼製の長尺部材であり、図３および図４に示すように、図中において左右に延びるウェブ３と、このウェブ３の両端から上下方向の一方に向けてそれぞれ斜めに張り出すフランジ４，４と、各フランジ４，４の先端から左右それぞれに張り出すアーム５，５と、各アーム５，５の先端にそれぞれ設けられる左右非対称の一対の継手６，７とを備えている。
なお、これらウェブ３、フランジ４，４、アーム５，５、継手６，７は一体形成されており、杭２は、断面形状が長さ方向にわたって等しくなるように形成されている。 The hat-type steel sheet piles 2 (2a, 2b) are long steel members. As shown in FIGS. 3 and 4, the web 3 extending in the left-right direction in the figure, and one of the web 3 from the both ends in the vertical direction. Flanges 4 and 4 projecting obliquely toward each other, arms 5 and 5 projecting left and right from the ends of the flanges 4 and 4, and a pair of left and right asymmetric joints provided at the tips of the arms 5 and 5, respectively 6 and 7.
The web 3, the flanges 4 and 4, the arms 5 and 5, and the joints 6 and 7 are integrally formed, and the pile 2 is formed so that the cross-sectional shape is equal over the length direction.

左右非対称の一対の継手６，７のうち、一方の継手６は、図３，４において左側に位置している。
この一方の継手６は、この一方の継手６の基端部（アーム５側端部）から爪の曲げ方向に張り出す突条部６ａと、前記基端部からフック状に設けられる爪部６ｂとを有しており、これら突条部６ａと爪部６ｂの先端とは互いに向き合うような位置関係となっている。そして、これら突条部６ａと爪部６ｂとの間には、後述する他方の継手７の爪部７ｂが差し込まれる。 Of the pair of left and right asymmetric joints 6 and 7, one joint 6 is located on the left side in FIGS.
The one joint 6 includes a protrusion 6a projecting from the base end (arm 5 side end) of the one joint 6 in the direction of claw bending, and a claw 6b provided in a hook shape from the base end. The protrusions 6a and the tips of the claw portions 6b are in a positional relationship so as to face each other. And the claw part 7b of the other joint 7 mentioned later is inserted between these protrusion part 6a and the claw part 6b.

他方の継手７は、この他方の継手７の基端部から（アーム５側端部）から、前記一方の継手６の爪部６ｂの先端に近い張出し方向に張り出す立ち上がり部７ａと、この立ち上がり部７ａからフック状に設けられる爪部７ｂとを有しており、これら立ち上がり部７ａと爪部７ｂの先端とは互いに向き合うような位置関係となっている。そして、これら立ち上がり部７ａと爪部７ｂとの間には、前記一方の継手６の爪部６ｂが差し込まれる。   The other joint 7 has a rising portion 7a protruding from the base end portion of the other joint 7 (the end portion on the arm 5 side) in the protruding direction close to the tip of the claw portion 6b of the one joint 6, and the rising portion 7a. It has a claw part 7b provided in a hook shape from the part 7a, and the rising part 7a and the tip of the claw part 7b are in a positional relationship so as to face each other. The claw portion 6b of the one joint 6 is inserted between the rising portion 7a and the claw portion 7b.

これら一方の継手６と他方の継手７とは、複数の杭２，２…（２ａ，２ｂ）を連続して圧入し、互いに連結させる際に、一方の継手６の爪部６ｂが前記他方の継手７の立ち上がり部７ａと爪部７ｂとの間に差し込まれ、他方の継手７の爪部７ｂが前記一方の継手６の突条部６ａと爪部６ｂとの間に差し込まれるようにして互いに係合しあう構成となっている。
なお、連結する杭同士２，２（２ａ，２ｂ）は、一方の杭２（２ａ，２ｂ）の他方の継手７と、他方の杭２（２ａ，２ｂ）の一方の継手６とが係合しあっている状態となっている。また、これら一方の継手６と他方の継手７とが係合した状態では、平面視において、隣り合う一方の杭２（２ａ，２ｂ）のアーム５と、他方の杭２（２ａ，２ｂ）のアーム５とが同一直線状に配置された状態となっている。 When the one joint 6 and the other joint 7 are press-fitted into a plurality of piles 2, 2... (2a, 2b) and connected to each other, the claw portion 6b of the one joint 6 is connected to the other joint 6. The joint 7 is inserted between the rising portion 7a and the claw portion 7b, and the claw portion 7b of the other joint 7 is inserted between the protrusion 6a and the claw portion 6b of the one joint 6. It is configured to engage each other.
The connected piles 2 and 2 (2a and 2b) are engaged with the other joint 7 of one pile 2 (2a and 2b) and the one joint 6 of the other pile 2 (2a and 2b). It is in a state of being together. In a state where these one joint 6 and the other joint 7 are engaged, the arm 5 of one adjacent pile 2 (2a, 2b) and the other pile 2 (2a, 2b) are seen in plan view. The arm 5 is arranged in the same straight line.

本実施の形態の平面視略円状の連続壁１は、前記杭圧入引抜機８によって、以上のような構成の杭２（２ａ，２ｂ）を複数連続して圧入するとともに、これら複数の杭２，２…（２ａ，２ｂ）を、継手６，７を介して互いに連結することによって形成されている。
そして、この連続壁１を形成する複数の杭２，２…（２ａ，２ｂ）のうち、最後に圧入される締切杭２ａの圧入方向先端部には、図２および図３（ｂ）に示すように、該締切杭２ａの両側に位置するとともに継手６，７を介して該締切杭２ａと連結される既設杭２ｂ，２ｂの位置調整を行うための位置調整治具１０が取り付けられている。 The continuous wall 1 having a substantially circular shape in a plan view according to the present embodiment is configured to press-fit a plurality of piles 2 (2a, 2b) having the above-described configuration by the pile press-fitting / pulling machine 8, and the plurality of piles. 2, 2... (2a, 2b) are connected to each other through joints 6 and 7.
And among the several piles 2, 2 ... (2a, 2b) which form this continuous wall 1, it shows in the press-fit direction front-end | tip part of the clamp pile 2a finally press-fitted in FIG.2 and FIG.3 (b). As described above, the position adjusting jig 10 for adjusting the position of the existing piles 2b and 2b that are located on both sides of the cutoff pile 2a and are connected to the cutoff pile 2a via the joints 6 and 7 is attached. .

この位置調整治具１０は、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７にそれぞれ係合する一対の治具本体１１，１２を備えている。
これら一対の治具本体１１，１２は、それぞれ前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に係合可能、かつ該締切杭２ａ側の継手６，７の長さ方向に沿って摺動可能に形成されている。 The position adjusting jig 10 includes a pair of jig bodies 11 and 12 that respectively engage with the joints 6 and 7 on the side of the cut-off pile 2a of the existing piles 2b and 2b on both sides.
The pair of jig bodies 11 and 12 can be engaged with the joints 6 and 7 on the side of the cutoff pile 2a of the existing piles 2b and 2b on both sides, respectively, and the length directions of the joints 6 and 7 on the side of the cutoff pile 2a It is formed to be slidable along.

一対の治具本体１１，１２のうち、一方の治具本体１１は、図３（ｂ）に示すように、正面視において直角台形状に形成されている。
この治具本体１１の上面は、前記締切杭２ａの下面に取り付けられる取付面１３とされており、治具本体１１の下面は、締切杭２ａを圧入する際の治具本体１１の圧入方向先端となる先端面１４とされている。この先端面１４は、正面視において、取付面１３よりも短く形成されており、これら取付面１３の端部から先端面１４の端部にかけて形成される面が傾斜面１５とされている。すなわち、治具本体１１は圧入方向の下方に向かうにつれて先細りする形状となっており、地盤に対して圧入しやすくなっている。
また、治具本体１１は、取付面１３を、締切杭２ａの下面に溶接するなどして強固に取り付けられている。 Of the pair of jig bodies 11, 12, one jig body 11 is formed in a right-angled trapezoidal shape when viewed from the front, as shown in FIG.
The upper surface of the jig body 11 is an attachment surface 13 that is attached to the lower surface of the clamp pile 2a, and the lower surface of the jig body 11 is the tip of the jig body 11 in the press-fitting direction when the clamp pile 2a is press-fitted. It is set as the front end surface 14 which becomes. The front end surface 14 is formed shorter than the attachment surface 13 in a front view, and a surface formed from the end of the attachment surface 13 to the end of the front end surface 14 is an inclined surface 15. That is, the jig body 11 has a shape that tapers as it goes downward in the press-fitting direction, and is easy to press-fit into the ground.
The jig body 11 is firmly attached by welding the attachment surface 13 to the lower surface of the cutoff pile 2a.

さらに、治具本体１１は、図５（ａ）に示すように、前記締切杭２ａの一端部に設けられた一方の継手６の断面形状と略等しい断面形状を有するように設定されている。
すなわち、この治具本体１１は、前記一方の継手６の突条部６ａの延長線上に配置されるとともに該突条部６ａと連続する突条部１１ａと、一方の継手６の爪部６ｂの延長線上に配置されるとともに該爪部６ｂと連続するフック状の爪部１１ｂとを有している。そして、これら突条部１１ａと爪部１１ｂの先端とは互いに向き合うような位置関係となっており、これら突条部１１ａと爪部１１ｂとの間には、前記既設杭２ｂの他方の継手７の爪部７ｂが差し込まれる。
なお、前記突条部１１ａおよび爪部１１ｂは、断面形状が長さ方向にわたって等しくなるように形成されている。 Furthermore, as shown in FIG. 5A, the jig body 11 is set to have a cross-sectional shape substantially equal to the cross-sectional shape of one joint 6 provided at one end of the cut-off pile 2a.
That is, the jig body 11 is arranged on the extended line of the ridge portion 6 a of the one joint 6 and is connected to the ridge portion 11 a continuous with the ridge portion 6 a and the claw portion 6 b of the one joint 6. It has a hook-shaped claw part 11b which is arranged on the extension line and is continuous with the claw part 6b. And these protrusion part 11a and the front-end | tip of the nail | claw part 11b become a positional relationship which mutually faces, Between these protrusion part 11a and the nail | claw part 11b, the other joint 7 of the said existing pile 2b is provided. The claw portion 7b is inserted.
In addition, the said protrusion part 11a and the nail | claw part 11b are formed so that cross-sectional shape may become equal over a length direction.

一対の治具本体１１，１２のうち、他方の治具本体１２も、図３（ｂ）に示すように、正面視において直角台形状に形成されており、取付面１３と、先端面１４と、傾斜面１５を有している。したがって、この治具本体１２も圧入方向の下方に向かうにつれて先細りする形状となっており、地盤に対して圧入しやすくなっている。
また、治具本体１２は、取付面１３を、締切杭２ａの下面に溶接するなどして強固に取り付けられている。
なお、この他方の治具本体１２は、前記一方の治具本体１１に対して、正面視において左右対称の直角台形となるように構成されている。 Of the pair of jig bodies 11, 12, the other jig body 12 is also formed in a right-angled trapezoidal shape when viewed from the front, as shown in FIG. And has an inclined surface 15. Therefore, this jig body 12 also has a shape that tapers as it goes downward in the press-fitting direction, and is easy to press-fit into the ground.
The jig body 12 is firmly attached by welding the attachment surface 13 to the lower surface of the cutoff pile 2a.
The other jig body 12 is configured to be a right-angled trapezoid that is symmetrical with respect to the one jig body 11 in a front view.

さらに、治具本体１２は、図５（ｂ）に示すように、前記締切杭２ａの他端部に設けられた他方の継手７の断面形状と略等しい断面形状を有するように設定されている。
すなわち、この治具本体１２は、前記他方の継手７の立ち上がり部７ａの延長線上に配置されるとともに該立ち上がり部７ａと連続する立ち上がり部１２ａと、他方の継手７の爪部７ｂの延長線上に配置されるとともに該爪部７ｂと連続するフック状の爪部１２ｂとを有している。そして、これら立ち上がり部１２ａと爪部１２ｂの先端とは互いに向き合うような位置関係となっており、これら立ち上がり部１２ａと爪部１２ｂとの間には、前記既設杭２ｂの一方の継手６の爪部６ｂが差し込まれる。
なお、前記立ち上がり部１２ａおよび爪部１２ｂは、断面形状が長さ方向にわたって等しくなるように形成されている。 Furthermore, as shown in FIG. 5B, the jig body 12 is set to have a cross-sectional shape substantially equal to the cross-sectional shape of the other joint 7 provided at the other end of the clamp pile 2a. .
That is, the jig body 12 is disposed on the extension line of the rising part 7a of the other joint 7 and on the extension line of the rising part 12a continuous with the rising part 7a and the claw part 7b of the other joint 7. It has a hook-like claw part 12b which is arranged and is continuous with the claw part 7b. The rising portions 12a and the tips of the claw portions 12b are positioned so as to face each other, and the claw of one joint 6 of the existing pile 2b is interposed between the rising portions 12a and the claw portions 12b. Part 6b is inserted.
The rising portion 12a and the claw portion 12b are formed so that their cross-sectional shapes are equal over the length direction.

前記一対の治具本体１１，１２には、図５（ａ），（ｂ）に示すように、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に対する摺動を円滑にするための摺動円滑手段３０が設けられている。
この摺動円滑手段３０としては、銅合金等をプレート状に形成した銅系ライナーや、銅合金等を溶接したものが採用されており、銅合金としては例えばアルミニウム青銅等が用いられている。このように前記一対の治具本体１１，１２に摺動円滑手段３０を設けることによって、前記一対の治具本体１１，１２が、前記既設杭２ｂ，２ｂの継手６，７に沿って摺動する際の焼付やカジリの発生を防止することができる。 As shown in FIGS. 5 (a) and 5 (b), the pair of jig bodies 11 and 12 can smoothly slide the existing piles 2b and 2b on both sides of the joints 6 and 7 on the side of the cutoff pile 2a. Sliding smooth means 30 is provided.
As the sliding smoothing means 30, a copper-based liner in which a copper alloy or the like is formed in a plate shape, or a welded copper alloy or the like is employed. As the copper alloy, for example, aluminum bronze or the like is used. Thus, by providing the sliding smoothing means 30 on the pair of jig bodies 11 and 12, the pair of jig bodies 11 and 12 slide along the joints 6 and 7 of the existing piles 2b and 2b. It is possible to prevent the occurrence of seizure and galling.

なお、本実施の形態においては、前記銅系ライナー３０が、前記一対の治具本体１１，１２に取り付けられている。その取付箇所は、前記治具本体１１，１２と、前記継手６，７とを係合させたときに接触する部分となっている。
治具本体１１の場合は、前記既設杭２ｂの他方の継手７の立ち上がり部７ａに接触する部分（爪部１１ｂの先端外側面）に１箇所と、該他方の継手７の爪部７ｂの先端が差し込まれる部分（爪部１１ｂの先端内側面および突条部１１ａの内側面）に２箇所、計３箇所に銅系ライナー３０が取り付けられている。
治具本体１２の場合は、前記既設杭２ｂの一方の継手６の突条部６ａに接触する部分（爪部１２ｂの先端外側面）に１箇所と、該一方の継手６の爪部６ｂの先端が差し込まれる部分（爪部１２ｂの先端内側面および立ち上がり部１２ａの内側面）に２箇所、計３箇所に銅系ライナー３０が取り付けられている。 In the present embodiment, the copper liner 30 is attached to the pair of jig bodies 11 and 12. The attachment location is a portion that contacts when the jig bodies 11 and 12 are engaged with the joints 6 and 7.
In the case of the jig body 11, the portion of the existing pile 2 b that is in contact with the rising portion 7 a of the other joint 7 (tip outer surface of the claw portion 11 b) and one tip of the claw portion 7 b of the other joint 7 are provided. Copper-based liners 30 are attached to two portions, that is, a total of three portions (the inner surface of the tip of the claw portion 11b and the inner surface of the ridge portion 11a).
In the case of the jig body 12, one portion is provided on a portion (outer end outer surface of the claw portion 12 b) of the existing pile 2 b that contacts the protruding portion 6 a of the one joint 6, and the claw portion 6 b of the one joint 6. Copper-based liners 30 are attached to a total of three locations at two locations where the tip is inserted (the inner surface of the tip of the claw portion 12b and the inner surface of the rising portion 12a).

次に、前記杭圧入引抜機８によって複数の杭２，２…（２ａ，２ｂ）を順次圧入するとともに、杭２，２（２ａ，２ｂ）同士を、継手６，７を介して連結しながら連続壁１を形成するに際し、最後に圧入される締切杭２ａを圧入する方法について説明する。
締切杭２ａの両側に位置する既設杭２ｂ，２ｂの間隙部１ａは、図１（ｂ）に示すように、該既設杭２ｂ，２ｂを含む複数の杭２，２…の施工精度により、その間隔が狭い場合や、図１（ｅ）に示すように、隣り合う既設杭２ｂ，２ｂとの間で法線のずれが生じた場合、図１（ｃ），（ｄ）に示すように、既設杭２ｂ，２ｂの傾きにより、その間隔が既設杭２ｂ，２ｂの長さ方向に沿って不規則になる場合がある。このような場合に、前記既設杭２ｂ，２ｂの位置調整が必要となる。 Next, a plurality of piles 2, 2... (2a, 2b) are sequentially press-fitted by the pile press-fitting and drawing machine 8, and the piles 2, 2 (2a, 2b) are connected to each other through joints 6 and 7. When forming the continuous wall 1, the method to press-fit the clamp pile 2a finally press-fitted is demonstrated.
As shown in FIG. 1 (b), the gap 1a between the existing piles 2b, 2b located on both sides of the cut-off pile 2a is determined by the construction accuracy of the plurality of piles 2, 2 ... including the existing piles 2b, 2b. As shown in FIGS. 1 (c) and 1 (d), when the interval is narrow, or as shown in FIG. 1 (e), when a normal shift occurs between the adjacent existing piles 2 b and 2 b, Due to the inclination of the existing piles 2b and 2b, the interval may become irregular along the length direction of the existing piles 2b and 2b. In such a case, it is necessary to adjust the positions of the existing piles 2b and 2b.

そこで、まず、前記杭圧入引抜機８によって締切杭２ａを圧入する前に、締切杭２ａの圧入方向先端部に、予め前記位置調整治具１０を取り付けておく。
さらに、この位置調整治具１０を構成する一対の治具本体１１，１２には、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に対する摺動を円滑にするために、前記摺動円滑手段３０を設けておくようにする。 Therefore, first, before the clamp pile 2a is press-fitted by the pile press-fitting / pulling machine 8, the position adjusting jig 10 is attached in advance to the front end portion of the clamp pile 2a in the press-fitting direction.
Furthermore, in order to smoothly slide the pair of jig bodies 11 and 12 constituting the position adjusting jig 10 with respect to the joints 6 and 7 on the cutoff pile 2a side of the existing piles 2b and 2b on both sides, The sliding smoothing means 30 is provided.

以上のように締切杭２ａの圧入方向先端部に前記位置調整治具１０を取り付けてから、締切杭２ａの圧入を行う。
この時、前記一対の治具本体１１，１２は、図３（ｂ）に示すように正面視において略直角台形状に形成されているので、地盤に対して圧入しやすくなっている。
さらに、一対の治具本体１１，１２に摺動円滑手段３０，３０…が設けられているので、前記既設杭２ｂ，２ｂ締切杭２ａ側の継手６，７に対して円滑に摺動することになる。なお、前記摺動円滑手段３０は、前記一対の治具本体１１，１２だけでなく、前記締切杭２ａの継手６，７に対して、前記一対の治具本体１１，１２と同じようにして設けてもよいものとする。
また、間隙部１ａの地盤をオーガ装置等の掘削機械によって先行掘削しておき、前記一対の治具本体１１，１２および締切杭２ａをより圧入しやすくしておいてもよい。 As described above, after the position adjusting jig 10 is attached to the front end of the clamp pile 2a in the press-fitting direction, the clamp pile 2a is press-fitted.
At this time, since the pair of jig bodies 11 and 12 are formed in a substantially right-angled trapezoidal shape in a front view as shown in FIG. 3B, it is easy to press-fit into the ground.
Further, since the sliding smoothing means 30, 30... Are provided in the pair of jig bodies 11, 12, the sliding can smoothly slide with respect to the joints 6, 7 on the existing pile 2b, 2b cut-off pile 2a side. become. The sliding smoothing means 30 is not limited to the pair of jig bodies 11 and 12 but also to the joints 6 and 7 of the clamp pile 2a in the same manner as the pair of jig bodies 11 and 12. It may be provided.
Further, the ground of the gap portion 1a may be pre-excavated by an excavating machine such as an auger device so that the pair of jig bodies 11 and 12 and the cut-off pile 2a can be more easily press-fitted.

締切杭２ａの圧入作業中は、前記一対の治具本体１１，１２によって既設杭２ｂ，２ｂの位置を調整しながら締切杭２ａを圧入するので、位置調整治具１０を取り付けない場合に比して格段に圧入しやすくすることができる。
なお、前記間隙部１ａの幅（既設杭２ｂ，２ｂ間の間隔）が極端に狭かったり、隣り合う既設杭２ｂ，２ｂとの間で極端に法線がずれていたり、既設杭２ｂ，２ｂが極端に傾いている場合には、杭圧入引抜機８による締切杭２ａの圧入動作と引き抜き動作とを繰り返して行うことにより、既設杭２ｂ，２ｂの位置を調整してもよい。この時も、締切杭２ａの圧入方向先端部に一対の治具本体１１，１２が取り付けられているので、位置調整治具１０を取り付けない場合に比して格段に圧入しやすくすることができる。 During press-fitting work of the cut-off pile 2a, the cut-off pile 2a is press-fitted while adjusting the position of the existing piles 2b, 2b by the pair of jig bodies 11, 12, compared with the case where the position adjusting jig 10 is not attached. This makes it much easier to press-fit.
Note that the width of the gap 1a (the interval between the existing piles 2b and 2b) is extremely narrow, the normal line is extremely shifted between the adjacent existing piles 2b and 2b, or the existing piles 2b and 2b are When it is extremely inclined, the positions of the existing piles 2b and 2b may be adjusted by repeatedly performing the press-fitting operation and the drawing operation of the cut-off pile 2a by the pile press-fitting and drawing machine 8. Also at this time, since the pair of jig bodies 11 and 12 are attached to the front end portion of the cut-off pile 2a in the press-fitting direction, the press-fitting can be made much easier than in the case where the position adjusting jig 10 is not attached. .

本実施の形態によれば、前記締切杭２ａの圧入方向先端部に取り付けられるとともに、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７にそれぞれ係合する一対の治具本体１１，１２を備えており、これら一対の治具本体１１，１２は、それぞれ前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に係合可能、かつ該締切杭２ａ側の継手６，７の長さ方向に沿って摺動可能に形成されているので、前記締切杭２ａを地盤に圧入する際に、締切杭２ａに先行して地盤に圧入されることになる。この時に、これら一対の治具本体１１，１２によって前記既設杭２ｂ，２ｂの位置を調整しながら締切杭２ａを圧入することができるので、位置調整治具１０を取り付けない場合に比して、締切杭２ａを地盤に圧入しやすくすることができる。
これによって、前記締切杭２ａの圧入時における継手６，７の変形を確実に防ぐことができ、前記連続壁１を確実に形成することが可能となる。 According to the present embodiment, a pair of jig main bodies that are attached to the press-fitting direction front end portion of the cut-off pile 2a and engage with the joints 6 and 7 on the cut-off pile 2a side of the existing piles 2b and 2b on both sides, respectively. 11 and 12, and the pair of jig bodies 11 and 12 can be engaged with the joints 6 and 7 on the cutoff pile 2 a side of the existing piles 2 b and 2 b on both sides, respectively, and on the cutoff pile 2 a side. Since the joints 6 and 7 are formed to be slidable along the length direction of the joints 6 and 7, when the clamp pile 2 a is press-fitted into the ground, it is press-fitted into the ground prior to the clamp pile 2 a. At this time, the clamp pile 2a can be press-fitted while adjusting the position of the existing piles 2b, 2b by the pair of jig bodies 11, 12, compared with the case where the position adjustment jig 10 is not attached. It is possible to make it easier to press-fit the cutoff pile 2a into the ground.
As a result, the joints 6 and 7 can be reliably prevented from being deformed when the clamp pile 2a is press-fitted, and the continuous wall 1 can be reliably formed.

また、前記一対の治具本体１１，１２には、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に対する摺動を円滑にするための摺動円滑手段３０，３０…が設けられているので、これら一対の治具本体１１，１２は、前記既設杭２ｂ，２ｂ締切杭２ａ側の継手６，７に対して円滑に摺動することになり、該継手６，７の長さ方向に沿ってスムーズに移動させることが可能となる。   Further, the pair of jig bodies 11, 12 includes sliding smoothing means 30, 30... For smooth sliding of the existing piles 2b, 2b on both sides with respect to the joints 6, 7 on the cut-off pile 2a side. Therefore, the pair of jig bodies 11 and 12 slide smoothly with respect to the joints 6 and 7 on the side of the existing piles 2b and 2b and the cut-off pile 2a. It becomes possible to move smoothly along the length direction.

また、前記一対の治具本体１１，１２は、それぞれ前記締切杭２ａの両端部に設けられた継手６，７の断面形状と略等しい断面形状を有するように設定されているので、これら一対の治具本体１１，１２と、前記既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７とを確実に係合させることができるとともに、これら一対の治具本体１１，１２を、前記既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７の長さ方向に沿って確実に摺動させることができる。また、製造時においても、複数の杭２の継手６，７と略等しい断面形状を有するように設計・製造すればよいので、コストの低減を図ることができる。   Further, the pair of jig bodies 11 and 12 are set so as to have a cross-sectional shape substantially equal to the cross-sectional shape of the joints 6 and 7 provided at both ends of the cut-off pile 2a. The jig bodies 11 and 12 can be reliably engaged with the joints 6 and 7 on the side of the cut-off pile 2a of the existing piles 2b and 2b, and the pair of jig bodies 11 and 12 are connected to the existing piles. It can be made to slide reliably along the length direction of the joints 6 and 7 on the side of the cut-off pile 2a of 2b and 2b. Moreover, since it should just design and manufacture so that it may have a cross-sectional shape substantially equal to the couplings 6 and 7 of the some pile 2 also at the time of manufacture, reduction of cost can be aimed at.

＜第２の実施の形態＞
次に、図面を参照して本発明の第２の実施の形態について説明する。なお、説明の便宜上、上述した第１の実施の形態とは異なる構成部分のみについて説明する。 <Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, only components that are different from the above-described first embodiment will be described.

本実施の形態の位置調整治具２０は、図４（ａ），（ｂ）に示すように、締切杭２ａに先行して地盤の掘削を行う先行施工機械９の掘削方向先端部に取り付けられるものである。
なお、この先行施工機械９は、従来公知のオーガ装置であり、円筒状のケーシング９ａと、このケーシング９ａ内に配置されるスクリュー９ｂとを備えている。このような先行施工機械９は地盤が硬質である場合に用いられ、内側のスクリュー９ｂを回転させることにより硬質地盤を掘削することができる。 As shown in FIGS. 4 (a) and 4 (b), the position adjusting jig 20 of the present embodiment is attached to the tip of the excavation direction of the preceding construction machine 9 that excavates the ground prior to the cut-off pile 2a. Is.
The preceding construction machine 9 is a conventionally known auger device, and includes a cylindrical casing 9a and a screw 9b disposed in the casing 9a. Such a preceding construction machine 9 is used when the ground is hard, and the hard ground can be excavated by rotating the inner screw 9b.

前記位置調整治具２０は、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７にそれぞれ係合する一対の治具本体２１，２２を備えている。
これら一対の治具本体２１，２２は、それぞれ前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に係合可能、かつ該締切杭２ａ側の継手６，７の長さ方向に沿って摺動可能に形成されている。
また、これら一対の治具本体２１，２２は、前記オーガ装置９の掘削方向先端部において、前記ケーシング９ａの外周面に取り付けられている。 The position adjusting jig 20 includes a pair of jig bodies 21 and 22 that respectively engage with the joints 6 and 7 on the side of the cut-off pile 2a of the existing piles 2b and 2b on both sides.
The pair of jig bodies 21 and 22 can be engaged with the joints 6 and 7 on the side of the cutoff pile 2a of the existing piles 2b and 2b on both sides, respectively, and the length direction of the joints 6 and 7 on the side of the cutoff pile 2a It is formed to be slidable along.
The pair of jig bodies 21 and 22 are attached to the outer peripheral surface of the casing 9 a at the excavation direction tip of the auger device 9.

一対の治具本体２１，２２のうち、一方の治具本体２１は、図４（ｂ）に示すように、正面視において矩形状に形成されている。
この治具本体２１のケーシング９ａ側面は、前記ケーシング９ａの外周面に取り付けられる取付面２３とされており、治具本体２１の下面は、オーガ装置９によって地盤を掘削する際の治具本体２１の地盤への圧入方向先端となる先端面２４とされている。
また、治具本体２１は、取付面２３を、前記ケーシング９ａの外周面に溶接するなどして強固に取り付けられている。
さらに、この治具本体２１も、図５（ａ）に示すように、前記締切杭２ａの一端部に設けられた一方の継手６の断面形状と略等しい断面形状を有するように設定されており、突条部２１ａと爪部２１ｂとを有している。そして、これら突条部２１ａと爪部２１ｂとの間には、前記既設杭２ｂの他方の継手７の爪部７ｂが差し込まれる。
なお、前記突条部２１ａおよび爪部２１ｂは、断面形状が長さ方向にわたって等しくなるように形成されている。 Of the pair of jig main bodies 21 and 22, one jig main body 21 is formed in a rectangular shape in front view as shown in FIG.
A side surface of the casing 9a of the jig main body 21 is an attachment surface 23 attached to the outer peripheral surface of the casing 9a. A lower surface of the jig main body 21 is the jig main body 21 when the auger device 9 excavates the ground. It is set as the front end surface 24 used as the front-end | tip of the press fit direction to the ground.
The jig body 21 is firmly attached by welding the attachment surface 23 to the outer peripheral surface of the casing 9a.
Further, as shown in FIG. 5A, the jig body 21 is also set to have a cross-sectional shape substantially equal to the cross-sectional shape of one joint 6 provided at one end portion of the clamp pile 2a. The ridge portion 21a and the claw portion 21b are provided. And the nail | claw part 7b of the other coupling 7 of the said existing pile 2b is inserted between these protrusion part 21a and the nail | claw part 21b.
In addition, the said protrusion part 21a and the nail | claw part 21b are formed so that cross-sectional shape may become equal over a length direction.

一対の治具本体２１，２２のうち、他方の治具本体２２も、図４（ｂ）に示すように、正面視において矩形状に形成されており、取付面２３と、先端面２４とを有している。
また、治具本体２２は、取付面２３を、前記ケーシング９ａの外周面に溶接するなどして強固に取り付けられている。
さらに、この治具本体２２も、図５（ｂ）に示すように、前記締切杭２ａの他端部に設けられた他方の継手７の断面形状と略等しい断面形状を有するように設定されており、立ち上がり部２２ａと爪部２２ｂとを有している。そして、これら立ち上がり部２２ａと爪部２２ｂとの間には、前記既設杭２ｂの一方の継手６の爪部６ｂが差し込まれる。
なお、前記立ち上がり部２２ａおよび爪部２２ｂは、断面形状が長さ方向にわたって等しくなるように形成されている。 Of the pair of jig bodies 21 and 22, the other jig body 22 is also formed in a rectangular shape when viewed from the front, as shown in FIG. Have.
The jig body 22 is firmly attached by welding the attachment surface 23 to the outer peripheral surface of the casing 9a.
Further, as shown in FIG. 5 (b), the jig body 22 is also set to have a cross-sectional shape substantially equal to the cross-sectional shape of the other joint 7 provided at the other end of the clamp pile 2a. And has a rising portion 22a and a claw portion 22b. And the nail | claw part 6b of one joint 6 of the said existing pile 2b is inserted between these rising parts 22a and the nail | claw part 22b.
The rising portion 22a and the claw portion 22b are formed so that their cross-sectional shapes are equal over the length direction.

さらに、これら一対の治具本体２１，２２にも、図５（ａ），（ｂ）に示すように、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に対する摺動を円滑にするための摺動円滑手段３０が設けられている。   Further, as shown in FIGS. 5 (a) and 5 (b), the pair of jig bodies 21 and 22 also slide on the joints 6 and 7 on the side of the cut-off pile 2a of the existing piles 2b and 2b on both sides. Sliding smoothing means 30 for smoothing is provided.

次に、本実施の形態における締切杭２ａの圧入方法について説明する。
なお、本実施の形態において締切杭２ａが圧入される地盤は硬質であり、締切杭２ａの圧入に先行してオーガ装置９による先行掘削が必要となっている。 Next, a method for press-fitting the cutoff pile 2a in the present embodiment will be described.
In the present embodiment, the ground into which the cutoff pile 2a is press-fitted is hard, and prior excavation by the auger device 9 is required prior to the press-fitting of the cutoff pile 2a.

まず、前記オーガ装置９によって地盤を掘削する前に、このオーガ装置９の掘削方向先端部において、前記ケーシング９ａの外周面に、予め前記位置調整治具２０を取り付けておく。
さらに、この位置調整治具２０を構成する一対の治具本体２１，２２には、前記摺動円滑手段３０を設けておくようにする。 First, before excavating the ground with the auger device 9, the position adjusting jig 20 is attached in advance to the outer peripheral surface of the casing 9a at the excavation direction front end of the auger device 9.
Further, the sliding smoothing means 30 is provided in a pair of jig bodies 21 and 22 constituting the position adjusting jig 20.

以上のようにオーガ装置９の掘削方向先端部に前記位置調整治具２０を取り付けてから地盤の掘削を行う。
すなわち、オーガ装置９によって硬質地盤を掘削することによって、前記一対の治具本体２１，２２は、オーガ装置９の掘削方向に沿って、かつ前記既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７の長さ方向に沿って進むことになる。つまり、オーガ装置９による地盤掘削すると同時に、前記一対の治具本体２１，２２によって既設杭２ｂ，２ｂの位置を調整することができる。 As described above, after the position adjusting jig 20 is attached to the tip of the auger device 9 in the excavation direction, the ground is excavated.
That is, by excavating the hard ground with the auger device 9, the pair of jig bodies 21, 22 is aligned with the excavation direction of the auger device 9 and the joint 6 on the cut-off pile 2 a side of the existing piles 2 b, 2 b. , 7 along the length direction. That is, at the same time as excavating the ground with the auger device 9, the positions of the existing piles 2b and 2b can be adjusted by the pair of jig bodies 21 and 22.

そして、オーガ装置９によって硬質地盤を掘削すると同時に、前記一対の治具本体２１，２２によって既設杭２ｂ，２ｂの位置を調整した後に、締切杭２ａを、継手６，７を介して既設杭２ｂ，２ｂと連結しながら間隙部１ａの掘削済み地盤に圧入する。
なお、本実施の形態では、締切杭２ａを地盤掘削後に圧入するものとしたが、締切杭２ａを前記ケーシング９ａと抱き合わせるとともに、継手６，７を介して既設杭２ｂ，２ｂと連結させて、オーガ装置９による地盤の掘削と、前記一対の治具本体２１，２２による既設杭２ｂ，２ｂの位置調整と、締切杭２ａの圧入とを同時進行で行うことも可能となっている。 Then, after excavating the hard ground with the auger device 9 and adjusting the positions of the existing piles 2b, 2b with the pair of jig bodies 21, 22, the cut-off pile 2a is connected to the existing pile 2b via the joints 6, 7. , 2b and press-fitted into the excavated ground in the gap 1a.
In the present embodiment, the cutoff pile 2a is press-fitted after ground excavation. However, the cutoff pile 2a is connected to the casing 9a and connected to the existing piles 2b and 2b via the joints 6 and 7. The excavation of the ground by the auger device 9, the position adjustment of the existing piles 2b, 2b by the pair of jig main bodies 21, 22 and the press-fitting of the cut-off pile 2a can be performed simultaneously.

本実施の形態によれば、前記締切杭２ａに先行して地盤の掘削を行う先行施工機械９の掘削方向先端部に取り付けられるとともに、前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７にそれぞれ係合する一対の治具本体２１，２２を備えており、これら一対の治具本体２１，２２は、それぞれ前記両側の既設杭２ｂ，２ｂの締切杭２ａ側の継手６，７に係合可能、かつ該締切杭２ａ側の継手６，７の長さ方向に沿って摺動可能に形成されているので、前記先行施工機械９によって地盤を掘削する際に、締切杭２ａに先行して地盤に圧入されることになる。この時に、これら一対の治具本体２１，２２によって前記既設杭２ｂ，２ｂの位置を調整することができるので、位置調整治具２０を取り付けない場合に比して、締切杭２ａを地盤に圧入しやすくすることができる。
これによって、前記締切杭２ａの圧入時における継手６，７の変形を確実に防ぐことができ、前記連続壁１を確実に形成することが可能となる。 According to the present embodiment, it is attached to the tip of the excavation direction of the preceding construction machine 9 for excavating the ground prior to the cut-off pile 2a, and the joint on the cut-off pile 2a side of the existing piles 2b, 2b on both sides 6 and 7, and a pair of jig bodies 21 and 22 respectively engaged with the joints 6 on the side of the cut-off pile 2 a of the existing piles 2 b and 2 b on both sides. 7 and is slidable along the length direction of the joints 6 and 7 on the side of the cut-off pile 2a. Therefore, when excavating the ground by the preceding construction machine 9, the cut-off pile 2a Will be press-fitted into the ground prior to. At this time, the position of the existing piles 2b, 2b can be adjusted by the pair of jig bodies 21, 22, so that the cut-off pile 2a is press-fitted into the ground as compared with the case where the position adjusting jig 20 is not attached. Can be easier.
As a result, the joints 6 and 7 can be reliably prevented from being deformed when the clamp pile 2a is press-fitted, and the continuous wall 1 can be reliably formed.

１ 連続壁
２ 杭
２ａ 締切杭
２ｂ 既設杭
６ 継手
７ 継手
１０ 位置調整治具
１１ 治具本体
１２ 治具本体
２０ 位置調整治具
２１ 治具本体
２２ 治具本体
３０ 摺動円滑手段 DESCRIPTION OF SYMBOLS 1 Continuous wall 2 Pile 2a Cut-off pile 2b Existing pile 6 Joint 7 Joint 10 Position adjustment jig 11 Jig body 12 Jig body 20 Position adjustment jig 21 Jig body 22 Jig body 30 Sliding smooth means

Claims (2)

連続壁を形成する複数の杭のうち、最後に地盤に圧入される締切杭の両側に位置するとともに継手を介して該締切杭と連結される既設杭の位置調整を行うための既設杭の位置調整治具であって、
前記締切杭の両端部に設けられた継手の圧入方向先端部に、下方に向かって突出するように取り付けられるとともに、前記両側の既設杭の締切杭側の継手にそれぞれ係合する一対の治具本体を備えており、
これら一対の治具本体は、それぞれ前記締切杭の両端部に設けられた継手の断面形状と略等しい断面形状を有するように設定されることによって、それぞれ前記両側の既設杭の締切杭側の継手に係合可能、かつ該締切杭側の継手の長さ方向に沿って摺動可能に形成されていることを特徴とする既設杭の位置調整治具。 The position of the existing pile for adjusting the position of the existing pile that is located on both sides of the final pile to be press-fitted into the ground and is connected to the final pile through a joint among the multiple piles that form the continuous wall An adjustment jig,
Press-fitting direction leading end portion of the joint provided at both ends of the deadline piles, mounted so as to protrude downward Rutotomoni, a pair of jigs respectively engaging the deadlines pile side joint of the existing pile of the two side It has a tool body,
The pair of jig bodies are set so as to have a cross-sectional shape substantially equal to the cross-sectional shape of the joints provided at both ends of the cut-off pile , respectively, so that the joints on the cut-off pile side of the existing piles on the both sides respectively. A jig for adjusting the position of an existing pile, wherein the jig is slidable along the length direction of the joint on the side of the cutoff pile. 前記一対の治具本体には、前記両側の既設杭の締切杭側の継手に対する摺動を円滑にするための摺動円滑手段が設けられていることを特徴とする請求項１に記載の既設杭の位置調整治具。   The said pair of jig | tool main bodies are provided with the sliding smooth means for smooth | sliding with respect to the joint by the side of the cut-off pile of the existing piles of the said both sides, The existing equipment of Claim 1 characterized by the above-mentioned. Pile position adjustment jig.
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