JP4662452B2 - Water drainage pipe construction method - Google Patents

Water drainage pipe construction method Download PDF

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JP4662452B2
JP4662452B2 JP2005107511A JP2005107511A JP4662452B2 JP 4662452 B2 JP4662452 B2 JP 4662452B2 JP 2005107511 A JP2005107511 A JP 2005107511A JP 2005107511 A JP2005107511 A JP 2005107511A JP 4662452 B2 JP4662452 B2 JP 4662452B2
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pipe
tube
drain pipe
drilling
drain
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JP2006283484A (en
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村 義 信 梅
藤 光 齋
田 致 義 米
田 誠 河
坪 稔 大
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Chemical Grouting Co Ltd
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Description

本発明は、地盤、特に砂の多い地盤から地下水を排出する工法に関し、より詳細には、地盤から排水するための水抜き管(水抜き管)を配設する工法に関する。   The present invention relates to a method for discharging groundwater from the ground, particularly a ground with a lot of sand, and more particularly to a method for disposing a drainage pipe (drainage pipe) for draining from the ground.

削孔管として、例えば同心の外管と内管とから成る二重管を用い、二重管削孔機械により削孔する技術は公知である(例えば、特許文献1参照)。   As a drilling tube, for example, a double tube made of a concentric outer tube and an inner tube is used, and a technique of drilling with a double tube drilling machine is known (for example, see Patent Document 1).

近年、都市部における土木工事(都市土木)でも、二重管等の削孔管により削孔する工事が施工されている。
ここで、都市土木では、埋立地が多い関係で、砂が多い地盤に対して上述の二重管により削孔する事例が多くなっている。
In recent years, even in civil engineering work (urban civil engineering) in urban areas, construction has been performed in which holes are drilled with a drilled pipe such as a double pipe.
Here, in urban civil engineering, there are many cases of drilling holes with the above-mentioned double pipes on ground with much sand due to the large number of landfills.

二重管で削孔した孔により、地盤から水抜きを行うに際しては、
1. 二重管先端から地盤を強化させるための薬液を注入し、
2. 薬液注入完了後、二重管の内管を引き抜き、
3. ドレーンパイプ(水抜き管)をソケットで継ぎ足しつつ、二重管の外管内側へ挿入し、薬液注入した領域まで差し込み、
4. 二重管の外管を引き抜く
という手順で行われる。
これによって、地下水は、ドレーンパイプの管壁を透過して、ドレーンパイプ内部を水路として流れて、ドレーンパイプの羽口側(地上側)端部から地盤外部に排出される。
When draining water from the ground using a hole drilled with a double pipe,
1. Injecting chemicals to strengthen the ground from the tip of the double pipe,
2. After completing the chemical injection, pull out the inner tube of the double tube,
3. Insert the drain pipe (drain pipe) into the outer pipe of the double pipe while connecting it with the socket, and insert it into the area where the chemical solution is injected.
4). The procedure is to pull out the outer pipe of the double pipe.
As a result, the groundwater passes through the pipe wall of the drain pipe, flows inside the drain pipe as a water channel, and is discharged from the tuyere side (ground side) end of the drain pipe to the outside of the ground.

ここで、地盤が流動性に富む地盤(例えば砂地盤)の場合、二重管の外管を削孔した孔から引き出す際に、ドレーンパイプ(水抜き管)が外管と一緒に引き出されてしまうという問題が発生する。
その様な問題について、図27、図28を参照して説明する。なお、図27、図28は前記1〜3の工程を経た後の従来の外管2と水抜き管4との関係を示した説明図であって、図27は管の側断面を示し、図28は拡大した正面図を示している。
図27において、地盤Gの図においては左端の深部の薬液注入領域Gsに配置された水抜き管4の管外方部から流入した土砂Sが水抜き管4と外管2との間の環状空間Cを充填し、そして流入した土砂Sが締まると、いわゆる「噛んだ」状態となってしまい、水抜き管4と外管2の両者を固定して、外管2のみ引き出すことを困難にする。
Here, in the case where the ground is rich in fluidity (for example, sand ground), when the outer pipe of the double pipe is pulled out from the drilled hole, the drain pipe (drain pipe) is pulled out together with the outer pipe. Problem occurs.
Such a problem will be described with reference to FIGS. 27 and 28 are explanatory views showing the relationship between the conventional outer pipe 2 and the drain pipe 4 after the steps 1 to 3, wherein FIG. 27 shows a side cross section of the pipe, FIG. 28 shows an enlarged front view.
In FIG. 27, in the figure of the ground G, the earth and sand S that has flowed in from the outside of the drainage pipe 4 disposed in the deep chemical injection region Gs at the left end is an annular shape between the drainage pipe 4 and the outer pipe 2. When the space C is filled and the soil S that has flowed in is tightened, the so-called “chewed” state occurs, and it is difficult to pull out only the outer tube 2 by fixing both the drain tube 4 and the outer tube 2. To do.

前記4の工程で外管2を地盤Gの外部に引き抜く際に、外管2の引き抜き当初は、外管2の切羽側(先端側)端部が薬液注入を行った領域Gsを移動するので、土砂Sが外管2と水抜き管4の間の環状空間に流れ込むことは無い。しかし、薬液注入を行った領域Gsを抜け出すと、土砂Sが外管2と水抜き管4の間の環状空間Cに流れ込み、前記図27、図28の状態によって土砂Sが締まることになる。   When the outer tube 2 is pulled out of the ground G in the process 4 above, the face side (tip side) end of the outer tube 2 moves in the region Gs where the chemical solution has been injected at the beginning of the pulling out of the outer tube 2. The earth and sand S do not flow into the annular space between the outer pipe 2 and the drain pipe 4. However, when the chemical solution is injected into the region Gs, the earth and sand S flow into the annular space C between the outer pipe 2 and the drain pipe 4, and the earth and sand S are tightened according to the states shown in FIGS.

この結果、外管2を引き抜くと、それと共に水抜き管4が連結具である継ぎ足し用ソケットから外れて、地上側に引き出されてしまう。
また、外管2を回転しながら引き抜く際に、水抜き管4がソケットから外れない場合には、水抜き管4が捻れて水路5を閉鎖してしまう不具合が発生する。特に、ソケットの固定をビス止めで行う継ぎ手方法を採用した場合には、(前記図27、図28の状態によって土砂Sが締まった場合には)水抜き管同士の確実な連結が、却って水抜き管4が捻れてしまう原因となってしまう。
As a result, when the outer pipe 2 is pulled out, the water draining pipe 4 is removed from the extension socket which is a connector and pulled out to the ground side.
In addition, when the outer pipe 2 is pulled out while rotating, if the drain pipe 4 cannot be removed from the socket, there is a problem that the drain pipe 4 is twisted and the water channel 5 is closed. In particular, when a joint method in which the socket is fixed with screws is used (when the earth and sand S is tightened according to the state shown in FIGS. 27 and 28), the drainage pipes are securely connected to each other. This will cause the extraction tube 4 to be twisted.

本発明は上述した従来技術の問題点に鑑みて提案されたものであり、削孔管(例えば二重管)を用いて削孔した孔内に水抜き管(ドレーンパイプ)を配置して排水をする際に、削孔管を引き抜く際に(例えば二重管の外管を引き抜く際に)、水抜き管が一緒に引き出され、及び/又は、水抜き管が捻れてしまうのを防止することが出来る様な水抜き管配設工法の提供を目的としている。   The present invention has been proposed in view of the above-described problems of the prior art, and a drain pipe (drain pipe) is disposed in a hole drilled using a drill pipe (for example, a double pipe) to drain water. To prevent the drainage tube from being pulled out together and / or twisting the drainage tube when pulling out the drilling tube (eg when pulling out the outer tube of the double tube) The purpose is to provide a drainage pipe arrangement method that can be used.

本発明によれば、削孔管(例えば二重管)2で地盤Gを削孔する削孔工程と、削孔管2内に水抜き管(ドレーンパイプ)4を挿入する水抜き管挿入工程と、削孔管2を回転しながら引き抜く削孔管引抜工程とを有し、該削孔管引抜工程では、水抜き管(4)に鋼管(22)を通すと共に水抜き管4の先端部にストッパ部材7を設け、削孔管2先端から地盤Gに薬液を注入してストッパ部材7を固定し、管の内部に配置された線状部材(例えばワイヤ)24の一端をストッパ部材7に接続し、その線状部材(24)の他端を鋼管(22)の後端部のキャップ(40)に接続して該線状部材(24)に張力を付与し、削孔管2を引き抜く際の引張力を線状部材24に負荷させることを特徴とする。

According to the present invention, a drilling process for drilling the ground G with a drilled pipe (for example, a double pipe) 2, and a drainage pipe inserting process for inserting a drain pipe (drain pipe) 4 into the drilled pipe 2. And a drilling tube drawing step of pulling out the drilling tube 2 while rotating. In the drilling tube drawing step , the steel pipe (22) is passed through the draining tube (4) and the tip of the draining tube 4 Is provided with a stopper member 7, a chemical solution is injected into the ground G from the end of the drill tube 2 to fix the stopper member 7, and one end of a linear member (for example, a wire) 24 disposed inside the tube is attached to the stopper member 7. The other end of the linear member (24) is connected to the cap (40) at the rear end of the steel pipe (22 ), tension is applied to the linear member (24), and the holed tube 2 is pulled out. It is characterized in that the tensile force is applied to the linear member 24.

上述した様な構成を具備する本発明によれば、削孔管引抜工程では、水抜き管の先端部に線状部材(例えば、ワイヤ)を接続し(例えば、水抜き管先端にストッパ部材を設け、該ストッパ部材を薬液の注入した領域で固定した状態で線状部材を接続している)、該線状部材に張力(緊張力)を付与した後に、削孔管(例えば、二重管の外管)を引き抜いているので、削孔管を羽口側に引き抜くことにより付加される引張力は線状部材にのみ作用し、水抜き管には作用しなくなる。そのため、施工現場が砂質の土壌であり、削孔管と水抜き管との間の環状空間に土砂が流入して締まった状態となり、削孔管と水抜き管とが固定されてしまったとしても(いわゆる「噛んだ」状態)、削孔管を引き抜こうとする力は水抜き管には作用せず、線状部材が受け持つこととなる。そのため、水抜き管が削孔管と一緒に抜け出てしまうことが防止される。   According to the present invention having the configuration as described above, in the drilling tube drawing step, a linear member (for example, a wire) is connected to the tip of the drainage tube (for example, a stopper member is attached to the tip of the drainage tube). A linear member is connected in a state where the stopper member is fixed in the region where the chemical solution is injected), and after applying tension (tensile force) to the linear member, a drilling tube (for example, a double tube) Therefore, the tensile force applied by pulling out the drilled tube toward the tuyere side acts only on the linear member and does not act on the drain tube. For this reason, the construction site is sandy soil, the earth and sand flowed into the annular space between the drilling pipe and the drainage pipe and became tight, and the drilling pipe and the drainage pipe were fixed. Even so (so-called “biting” state), the force to pull out the drilling tube does not act on the drainage tube, but the linear member takes charge. Therefore, the drain pipe is prevented from coming out together with the drilling pipe.

そして、水抜き管が削孔管(例えば、二重管の外管)と一緒に抜け出してしまうことが防止されるため、水抜き管を継ぎ足すソケットと水抜き管とをビス止め等する必要が無くなる。従って、削孔管引抜工程で削孔管を回転しても、当該回転は水抜き管とソケットとが空回りすることにより、水抜き管には伝達されない。そのため、削孔管引抜工程で水抜き管が捻れたり、場合によっては捻じ切れてしまう事が防止される。   And since it is prevented that the drain pipe is pulled out together with the drilling pipe (for example, the outer pipe of the double pipe), it is necessary to screw the socket and drain pipe to which the drain pipe is added. Disappears. Therefore, even if the drilling tube is rotated in the drilling tube drawing process, the rotation is not transmitted to the drainage tube because the drainage tube and the socket are idle. For this reason, it is possible to prevent the drain pipe from being twisted or possibly being twisted off in some cases.

本発明において、剛性部材(22)の先端側を固定(例えば、水抜き管4の先端部にストッパ部材7を設け、削孔工程に際して削孔管先端から薬液を注入し、薬液を注入した領域Gsにストッパ部材7を固定し、固定されたストッパ部材7に剛性部材22を螺合する)した後に、削孔管(二重管の外管)を引き抜く様に構成すれば、削孔管を羽口側に引き抜くことにより付加される引張力は剛性部材にのみ作用し、水抜き管には作用しない。そのため、削孔管と水抜き管との間の環状空間に土砂が流入して締まった状態(いわゆる「噛んだ」状態)となっても、削孔管を引き抜こうとする力は剛性部材が受け持つので、水抜き管が削孔管と一緒に抜け出てしまうことが防止される。   In the present invention, the distal end side of the rigid member (22) is fixed. If the stopper member 7 is fixed to Gs and the rigid member 22 is screwed to the fixed stopper member 7, then the drilling tube (the outer tube of the double tube) is pulled out, the drilling tube The tensile force applied by pulling out to the tuyere side acts only on the rigid member and does not act on the drain pipe. Therefore, even if the earth and sand flows into the annular space between the drilling pipe and the drainage pipe and becomes tight (so-called “biting” state), the rigid member takes charge of pulling out the drilling pipe. Therefore, it is possible to prevent the drain pipe from coming out together with the drilling pipe.

そして、水抜き管が削孔管(二重管の外管)と一緒に抜け出してしまうことが防止されるため、水抜き管を継ぎ足すソケットと水抜き管とをビス止め等する必要が無くなり、水抜き管とソケットとが空回りする可能な構造を採用できる。従って、削孔管引抜工程で削孔管を回転しても、水抜き管が捻れたり、捻じ切れてしまう事が防止される。   And since the drain pipe is prevented from coming out together with the drilling pipe (double pipe outer pipe), there is no need to screw the socket and drain pipe to the drain pipe. In addition, it is possible to adopt a structure in which the drain pipe and the socket can be idle. Therefore, even if the drill tube is rotated in the drill tube extracting process, the drain tube is prevented from being twisted or twisted.

また、剛性部材は押圧力も支持することが出来るので、切羽側に向って押圧力を作用させる必要性が生じた場合(例えば、水抜き管先端に設けたストッパ部材を押圧する必要が生じた場合)において、剛性部材を介して羽口側或いは地上側から押圧力を付与することが可能となる。   In addition, since the rigid member can also support the pressing force, when it becomes necessary to apply the pressing force toward the face side (for example, it is necessary to press the stopper member provided at the tip of the drain pipe) In this case, it is possible to apply a pressing force from the tuyere side or the ground side via the rigid member.

ここで、前記剛性部材として、全長に亘ってねじ部を形成した剛性部材(例えば、ネジ付き鋼棒)を採用すれば、例えば鋼管等の剛性部材を使用する場合と同様に、削孔管を羽口側に引き抜く際の引張力を水抜き管に作用させなくすることが出来ると共に、当該剛性部材により、押圧力も支持することが出来る(例えば、水抜き管先端に設けたストッパ部材を押圧する必要が生じた場合等に対処することが出来る)。
そして、全長に亘ってねじ部を形成した剛性部材(例えば、ねじ付き鋼棒)は再利用が可能であるため、本発明の施工コストの低減に寄与することが出来る。
Here, if a rigid member (for example, a threaded steel bar) having a threaded portion formed over the entire length is employed as the rigid member, a drilled tube is used as in the case of using a rigid member such as a steel pipe. The pulling force when pulling out to the tuyere side can be prevented from acting on the drain pipe, and the pressing force can be supported by the rigid member (for example, pressing the stopper member provided at the tip of the drain pipe) If you need to do this, you can deal with it).
And since the rigid member (for example, steel rod with a screw) which formed the thread part over the full length can be reused, it can contribute to reduction of the construction cost of the present invention.

また本発明において、水抜き管(4)の先端部に線状部材(24)を接続する(例えば、水抜き管4の先端部にストッパ部材7を設け、削孔工程に際して削孔管先端から薬液を注入し、薬液を注入した領域Gsにストッパ部材7を固定し、ストッパ部材7に線状部材24を接続して行う)と共に、中空の剛性部材(例えば、鋼管)を当接し、剛性部材の内部に線状部材を通し、該線状部材に張力(緊張力)を付与した後に、削孔管(二重管の外管)を引き抜く様に構成すれば、削孔管を羽口側に引き抜くことにより付加される引張力は線状部材にのみ作用し、水抜き管には作用しない。
そのため、削孔管と水抜き管とが固定されても(いわゆる「噛んだ」状態となっていても)、水抜き管が削孔管と一緒に抜け出てしまうことが防止される。
In the present invention, the linear member (24) is connected to the tip of the drain pipe (4) (for example, a stopper member 7 is provided at the tip of the drain pipe 4 so that the tip of the drill pipe can be used in the drilling step). A chemical member is injected, the stopper member 7 is fixed to the region Gs into which the chemical solution has been injected, and the linear member 24 is connected to the stopper member 7), and a hollow rigid member (for example, a steel pipe) is brought into contact with the rigid member. If a drilling tube (outer tube of a double tube) is pulled out after passing a linear member inside the tube and applying tension (tensile force) to the linear member, the drilling tube is connected to the tuyere side. The tensile force applied by pulling out the wire acts only on the linear member and does not act on the drain pipe.
Therefore, even if the hole drilling tube and the drainage tube are fixed (even in a so-called “biting” state), the drainage tube is prevented from coming out together with the hole drilling tube.

そして、水抜き管が外管と一緒に抜け出してしまうことが防止されるため、水抜き管を継ぎ足すソケットと水抜き管とをビス止め等する必要が無くなり、水抜き管とソケットとが空回りする可能な構造を採用できる。従って、削孔管引抜工程で削孔管を回転しても、水抜き管が捻れたり、捻じ切れてしまう事が防止される。   And since the drain pipe is prevented from coming out together with the outer pipe, there is no need to screw the socket to add the drain pipe and the drain pipe, and the drain pipe and socket are idle. Possible structures can be adopted. Therefore, even if the drill tube is rotated in the drill tube extracting process, the drain tube is prevented from being twisted or twisted.

また、切羽側を押圧する必要が生じた場合(例えば、水抜き管先端に設けたストッパ部材を押圧する必要が生じた場合)において、剛性部材により押圧力も支持することが出来るので、剛性部材を介して羽口側或いは地上側から押圧力を付与することが可能となる。   Further, when it is necessary to press the face side (for example, when it is necessary to press the stopper member provided at the tip of the drain pipe), the pressing force can be supported by the rigid member. It is possible to apply a pressing force from the tuyere side or the ground side via the.

以下、添付図面を参照しつつ、本発明の実施形態について説明する。
先ず、図1〜図27を参照して、本発明の第1実施形態を説明する。
図1は、本発明で使用する水抜き管固定装置1を示していて、外管2と図示しない内管とからなる2重管により地盤Gに削孔された孔2aに埋設された外管2と、外管2の内部最深部の薬液注入領域Gsに配置されたストッパ部材7と、ストッパ部材7の後部即ち羽口P方向に配置された剛性部材であるガイド鋼管22と、ガイド鋼管22の半径方向外方に配置された水抜き管4と、水抜き管4の外部に取付られたセンタライザー37と、鋼管22の内部に配置された線状部材のワイヤ24と、ワイヤ24の端部に取付けられるキャップ40とで主要部が構成されている。
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
First, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a drain pipe fixing device 1 used in the present invention, and an outer pipe embedded in a hole 2a drilled in the ground G by a double pipe comprising an outer pipe 2 and an inner pipe (not shown). 2, a stopper member 7 disposed in the chemical solution injection region Gs in the innermost deep part of the outer tube 2, a guide steel tube 22 that is a rigid member disposed in the rear portion of the stopper member 7, that is, the tuyere P direction, and a guide steel tube 22 A drain pipe 4 arranged radially outward, a center riser 37 attached to the outside of the drain pipe 4, a wire 24 of a linear member arranged inside the steel pipe 22, and an end of the wire 24 The main part is comprised with the cap 40 attached to a part.

ストッパ部材7は、正面を示す図2及び側面を示す図3において、端部に円錐状の頭部7aを付けた管状部8の前部近傍に半径方向外方かつ、地盤Gの羽口P方向にのびる図においては6枚の羽根部9が取付けられている。
羽根部9の半径方向外端部は、半径方向内方に屈曲して形成され、羽根部9の弾性によって外管2内に挿入容易にせしめている。また外管2を引き抜いた状態では、削孔された孔2aにストッパ部材7が同心に位置するよう、かつ地盤G外への抜け止めとなるよう構成されている。
In FIG. 2 showing the front and in FIG. 3 showing the side, the stopper member 7 is radially outward and near the tuyere P of the ground G in the vicinity of the front portion of the tubular portion 8 with the conical head portion 7a at the end. In the drawing extending in the direction, six blade portions 9 are attached.
A radially outer end portion of the blade portion 9 is formed to bend inward in the radial direction, and is easily inserted into the outer tube 2 by the elasticity of the blade portion 9. Further, when the outer tube 2 is pulled out, the stopper member 7 is concentrically positioned in the drilled hole 2a and is prevented from coming out of the ground G.

管状部8の軸線方向のほぼ中央部に鍔部8aが付設され、ストッパ材7の外周に取付けられる水抜き管4の端部位置をきめるよう構成されている。
鍔部8aの地盤Gの羽口P方向の近傍に孔10が形成され、図1に示すように、水抜き管4をボルト10Aで管状部8に固定するよう構成されている。
A flange portion 8 a is attached to a substantially central portion in the axial direction of the tubular portion 8, and the end portion position of the drain pipe 4 attached to the outer periphery of the stopper material 7 is determined.
A hole 10 is formed in the vicinity of the tuyere part 8a in the tuyere P direction of the ground G, and the drain pipe 4 is fixed to the tubular part 8 with a bolt 10A as shown in FIG.

また、管状部8の開放端部近傍に管状部8の内径にフック座11を備えた円板11aが固着され、フック座11にワイヤ24を繋着させる回動フック12が軸心まわりに回動自在に取付けられている。
また、管状部8の開放端部外部に雄ねじ部13が逆ねじで設けられている。
In addition, a disc 11 a having a hook seat 11 is fixed to the inner diameter of the tubular portion 8 in the vicinity of the open end of the tubular portion 8, and a rotating hook 12 that connects the wire 24 to the hook seat 11 rotates around the axis. It is mounted movably.
Further, a male screw portion 13 is provided on the outside of the open end portion of the tubular portion 8 by a reverse screw.

図4は、管状部8の雄ねじ部13に螺結する雌ねじ部14を備えた筒状のキャップ15を示しており、キャップ15の端部板16にワイヤ24が貫通する孔17が設けられている。
キャップ15内にグリースが充填されており、管状部8に螺結された状態で外部からの土砂の浸入を防ぎ、以って回動フック12の回動機能が減じないように構成されている。
FIG. 4 shows a cylindrical cap 15 having a female screw portion 14 that is screwed into the male screw portion 13 of the tubular portion 8, and a hole 17 through which a wire 24 passes is provided in an end plate 16 of the cap 15. Yes.
The cap 15 is filled with grease, and is configured to prevent intrusion of earth and sand from the outside while being screwed into the tubular portion 8, thereby preventing the turning function of the turning hook 12 from being reduced. .

図5は、水抜き管4を示している。
例えば、標準物性として空隙率70%以上、透水係数0.21、粗度係数0・016のファイバーで構成されていて、標準長さ2mのものを図6に示す樹脂製のソケット6で連結して所定長さで使用する。外径Doは外管2との間に例えば従来の約5倍の25mm程度の充分な隙間を形成できるように、また削孔された孔2a(図1)との間に後記するセンタライザー37の取付けを配慮した適宜充分な空間を有するよう形成され、内径Diは水路として充分に作用するよう形成されている。
FIG. 5 shows the drain pipe 4.
For example, the standard physical properties are composed of fibers with a porosity of 70% or more, a water permeability coefficient of 0.21, and a roughness coefficient of 0.016, and those having a standard length of 2 m are connected by a resin socket 6 shown in FIG. And use it at a predetermined length. For example, a centerer 37 described later is formed between the outer diameter Do and the outer tube 2 so that a sufficient gap of, for example, about 25 mm, which is about five times the conventional diameter, can be formed. The inner diameter Di is formed so as to sufficiently act as a water channel.

図6は、ソケット6を示していて、筒状体に水が通過する複数の窓6aが設けられ、外周面に鋸歯状の突起6bが中央を挟んで向かい合うように設けられている。   FIG. 6 shows a socket 6, in which a plurality of windows 6 a through which water passes is provided in a cylindrical body, and serrated projections 6 b are provided on the outer peripheral surface so as to face each other across the center.

図7は、水抜き管4、4のソケット6による連結状態を示しており、工事完成時には除外される剛性部材の鋼管22の外周に水抜き管4、4が配置され、その連結部にソケット6が突起6bを抜け止として取付けられた状態である。   FIG. 7 shows a connection state of the drain pipes 4 and 4 with the socket 6. The drain pipes 4 and 4 are arranged on the outer periphery of the steel pipe 22 of the rigid member which is excluded at the completion of the construction, and the socket is connected to the connection portion. 6 is a state in which the protrusion 6b is attached as a stopper.

水抜き管4の外周部に適宜の距離をおいて取付けられるセンタライザー37は、正面を示す図8及び側面を示す図9において、端部にクリップ38aで開口した輪体部38と、その端部に半径方向外方かつ羽口P方向にのびる図においては4枚の羽根部39が取付けられて構成されている。   The center riser 37 attached to the outer periphery of the drain pipe 4 at an appropriate distance is shown in FIG. 8 showing the front surface and FIG. 9 showing the side surface. In the drawing extending radially outward and in the tuyere P direction, four blade portions 39 are attached to the portion.

羽根部39の半径方向外端部は、半径方向内方に屈曲した屈曲部39aが形成され、羽根部39が弾性によって外管2内に水抜き管4の配置が外管2と同心に、挿入容易に、また外管2を引き抜いた最終完成状態では削孔された孔2aに水抜き管4が同心に位置するよう、かつ抜け止めとなるよう構成されている。   A bent portion 39a that is bent radially inward is formed at the radially outer end portion of the blade portion 39, and the arrangement of the drain tube 4 is concentric with the outer tube 2 in the outer tube 2 due to elasticity of the blade portion 39. In the final completed state where the outer tube 2 is pulled out easily, the drain tube 4 is configured to be concentrically positioned in the drilled hole 2a and to prevent the removal.

図10は、剛性部材の鋼管22を示していて、外径Dmが水抜き管4の内径Diより僅かに小さく遊嵌めできるように形成され、管端に雄ねじ22a、雌ねじ22bが設けられていて、連結可能に構成されている。装着時は、雌ねじ22bがストッパ部材7に向くように配置される。
なお、鋼管22のうち、ストッパ7に連結する切羽側最先端のものは、ワイヤ24と組み合わせて使用する場合(図1の構成)ではねじ山が形成されている必要は無い。それに対して、ワイヤ24を設けない場合には、鋼管22先端に逆ねじとなった雌ねじを形成し、鋼管22に対して右回りの回転を負荷した場合、鋼管22同士は締まって確実に回転力を伝達し、ストッパ24の雄ねじと鋼管22先端の雌ねじとの螺合が解除されるように構成されている。
FIG. 10 shows a steel pipe 22 which is a rigid member, and is formed so that the outer diameter Dm can be loosely fitted slightly smaller than the inner diameter Di of the water draining pipe 4, and a male screw 22a and a female screw 22b are provided at the pipe end. It is configured to be connectable. At the time of mounting, the female screw 22b is arranged so as to face the stopper member 7.
Of the steel pipes 22, the most advanced one on the face side connected to the stopper 7 does not need to be threaded when used in combination with the wire 24 (configuration in FIG. 1). On the other hand, when the wire 24 is not provided, a female thread that is a reverse thread is formed at the tip of the steel pipe 22, and when the clockwise rotation is applied to the steel pipe 22, the steel pipes 22 are tightened and reliably rotated. The force is transmitted, and the male screw of the stopper 24 and the female screw at the tip of the steel pipe 22 are released.

図11は、長ボルト26を示していて、単品を図示しない線状体のワイヤ24に連結してワイヤ24に張力を付与する機能を有するように構成されている。そして、端部に回動フック32がフック座27aを介して頭部27に回動自在に取付けられ、頭部27はねじ部26aに固定されている。   FIG. 11 shows a long bolt 26, which is configured to have a function of connecting a single product to a wire 24 (not shown) and applying tension to the wire 24. A rotating hook 32 is rotatably attached to the head portion 27 via a hook seat 27a at the end, and the head portion 27 is fixed to the screw portion 26a.

図12及び13は、鋼管22とともにワイヤ24に張力を付与するための横向きハット状のキャップ40を示している。その頂部に前記長ボルトのねじ部26aが貫通する孔42が設けられ、開口側に水抜き管固定装置1が組まれた段階には水抜き管4の端部をストッパ部材7の方向に抑える機能を有するフランジ41が設けられている。   12 and 13 show a laterally hat-like cap 40 for applying tension to the wire 24 together with the steel pipe 22. A hole 42 through which the threaded portion 26a of the long bolt passes is provided at the top, and the end of the drain pipe 4 is held in the direction of the stopper member 7 when the drain pipe fixing device 1 is assembled on the opening side. A flange 41 having a function is provided.

図10は、剛性部材の鋼管22を示していて、外径Dmが水抜き管4の内径Diより僅かに小さく遊嵌めできるように形成され、管端に雄ねじ22a、雌ねじ22bが設けられていて、連結可能に構成されている。装着時は、雌ねじ22bがストッパ部材7に向くように配置される。
なお、鋼管22のうち、ストッパ7に連結する切羽側最先端のものは、ワイヤ24と組み合わせて使用する場合(図1の構成)ではねじ山が形成されている必要は無い。それに対して、ワイヤ24を設けない場合には、鋼管22先端に逆ねじとなった雌ねじを形成し、鋼管22に対して右回りの回転を負荷した場合、鋼管22同士は締まって確実に回転力を伝達し、ストッパ24の雄ねじと鋼管22先端の雌ねじとの螺合が解除されるように構成されている。
FIG. 10 shows a steel pipe 22 which is a rigid member, and is formed so that the outer diameter Dm can be loosely fitted slightly smaller than the inner diameter Di of the water draining pipe 4, and a male screw 22a and a female screw 22b are provided at the pipe end. It is configured to be connectable. At the time of mounting, the female screw 22b is arranged so as to face the stopper member 7.
Of the steel pipes 22, the most advanced one on the face side connected to the stopper 7 does not need to be threaded when used in combination with the wire 24 (configuration in FIG. 1). On the other hand, when the wire 24 is not provided, a female thread that is a reverse thread is formed at the tip of the steel pipe 22, and when the clockwise rotation is applied to the steel pipe 22, the steel pipes 22 are tightened and reliably rotated. The force is transmitted, and the male screw of the stopper 24 and the female screw at the tip of the steel pipe 22 are released.

両バンド52、53はそれぞれ半円孤と締結用の平面部52a、53aを備え、下部バンド52は円板51に固着されている。上部バンド53は図17、18に示すように、円弧内面に弾性材の抑え54が取付けられている。両バンド52、53の形成する内径は、水抜き管4を締め付けるような寸法になっている。   Both bands 52 and 53 have semicircular arcs and fastening flat portions 52 a and 53 a, respectively, and the lower band 52 is fixed to the disc 51. As shown in FIGS. 17 and 18, the upper band 53 has an elastic material retainer 54 attached to the inner surface of the arc. The inner diameter formed by both bands 52 and 53 is such a dimension that the drain pipe 4 is tightened.

図19、20は、工法の最終段階で鋼管22を引き抜く際の鋼管引き抜き部材61を示している。平板状でフック用孔62aを備えたフック部62にフランジ65が固定され、フランジ65に鋼管22の雄ねじに螺合する雌ねじ64を設けた筒部63が固定されている。   19 and 20 show a steel pipe drawing member 61 when the steel pipe 22 is drawn at the final stage of the construction method. A flange 65 is fixed to a hook portion 62 that is flat and has a hook hole 62a, and a cylindrical portion 63 provided with a female screw 64 that is screwed into the male screw of the steel pipe 22 is fixed to the flange 65.

上記各部材を準備して本発明の水抜き管配設工法を、図1〜図20で説明した各部材を使用した工法を示す図21〜図27を参照して以下に説明する。   The above-described members are prepared and the drainage pipe arrangement method of the present invention will be described below with reference to FIGS. 21 to 27 showing the methods using the members described in FIGS.

図21は、水平水抜き施工のための削孔作業を示している。削孔機能を有する機械Maによって外管2と内管3aによる2重管3によって、羽口Pの横方向の所定位置まで削孔を行う。この工程が削孔工程である。   FIG. 21 shows a drilling operation for horizontal drainage construction. Drilling is performed to a predetermined position in the lateral direction of the tuyere P by the double tube 3 including the outer tube 2 and the inner tube 3a by the machine Ma having a hole drilling function. This process is a drilling process.

図22は、2重管3の内管3aを介して削孔先端部に水ガラス等の止水薬液を注入する薬液注入工程の作業を示している。   FIG. 22 shows the operation of a chemical solution injection process for injecting a water-stopping chemical solution such as water glass into the drilled hole tip through the inner tube 3 a of the double tube 3.

図23は、内管3aを外部に引き出す状態を示している。この工程が内管引き抜き工程である。   FIG. 23 shows a state in which the inner tube 3a is pulled out. This process is an inner pipe drawing process.

次に工法の準備工程を説明する。
図24は外管2内に水抜き管4、鋼管22及びワイヤ24等を挿入して設置する状態を示している。この工程が水抜き管4挿入工程である。なお、上述した請求項1の形態では、鋼管22の設置作業は省かれる。
Next, the preparation process of the construction method will be described.
FIG. 24 shows a state in which the drain pipe 4, the steel pipe 22, the wire 24, and the like are inserted and installed in the outer pipe 2. This process is a drainage pipe 4 insertion process. In addition, in the form of Claim 1 mentioned above, the installation operation | work of the steel pipe 22 is omitted.

第1段階として、ストッパ部材7の後部にある回動フック12(図1、3)にワイヤ24をクリップ24aによって結合する。この回動フック12によってワイヤ24に捻れが生じることが防止される。   As a first step, the wire 24 is coupled to the rotating hook 12 (FIGS. 1 and 3) at the rear of the stopper member 7 by a clip 24a. The turning hook 12 prevents the wire 24 from being twisted.

第2段階として、カバー15をストップ部材7の端部にある雄ねじ部13に螺結する。カバー15は、鋼管22その他との干渉による回動フック12の損傷を防止することと、回動フック12が土砂によって回動不能にならぬような機能を有している。そのために、カバー15内にグリース充填が行われる。   As a second step, the cover 15 is screwed to the male screw portion 13 at the end of the stop member 7. The cover 15 has a function of preventing the turning hook 12 from being damaged due to interference with the steel pipe 22 and the like and preventing the turning hook 12 from being turned unrotatable by earth and sand. Therefore, the cover 15 is filled with grease.

第3段階として、水抜き管4に鋼管22を通し、鋼管22内にワイヤ24を通す。   As a third stage, the steel pipe 22 is passed through the drain pipe 4 and the wire 24 is passed through the steel pipe 22.

なお、後述するように、外管引き抜きに際しては外管2を回転しながら引き抜くが、この引張り力は、鋼管22内に通したワイヤ24で受け持つので、水抜き管4がソケットから外れて抜けてしまうことが無い。   As will be described later, when the outer tube is pulled out, the outer tube 2 is pulled while rotating, but this tensile force is handled by the wire 24 that passes through the steel tube 22, so that the drain tube 4 comes off the socket and comes out. There is no end.

また、外管2の回転に対しては、ソケット6が空回りする。その結果、外管2を回転しても、水抜き管4が捻れてしまう事が無く、当該回転により、ソケット6から水抜き管4が外れたり、捻れたりすることは無い。   Further, the socket 6 is idle with respect to the rotation of the outer tube 2. As a result, even if the outer pipe 2 is rotated, the drain pipe 4 is not twisted, and the drain pipe 4 is not detached from the socket 6 or twisted by the rotation.

ここで、外管2を回転しながら引き抜く際に、水抜き管4に押し込み力を作用させる場合がある。しかし、水抜き管4を押し込むことは出来ない。水抜き管4は繊維質材料(ファイバー)で構成された柔軟材なので押し込み力が作用すると、座屈してしまう。
そして、前記ワイヤでは、水抜き管4に作用する押し込み力を担当することが出来ない。
これに対して、図示の実施形態では、鋼管22が押し込み力を受け持つので、係る押し込み力を作用させなければならない場合に対処することが出来る。
Here, when the outer pipe 2 is pulled out while rotating, a pushing force may be applied to the drain pipe 4. However, the drain pipe 4 cannot be pushed in. Since the drain pipe 4 is a flexible material made of a fibrous material (fiber), it will buckle when a pushing force is applied.
The wire cannot handle the pushing force acting on the drain pipe 4.
On the other hand, in the illustrated embodiment, since the steel pipe 22 is responsible for the pushing force, it is possible to cope with the case where the pushing force must be applied.

次に第4段階として、水抜き管固定装置1の先端としてストッパ7を固定する   Next, as a fourth stage, the stopper 7 is fixed as the tip of the drain pipe fixing device 1.

次に第5段階として、図24に示すように、ストッパ部材7を先頭にして外管2内に、水抜き管4と鋼管22とワイヤ24を挿入する。
挿入に際して、ストッパ部材7の羽根部9とセンタライザー37の羽根部39が心出しをし、かつ摺動抵抗を軽減して容易に挿入できる。センタライザー37により、水抜き管4は二重管外管2の管壁内面に対して点接触しているため、総重量100kg程度の水抜き管であっても、人手により押し込める。
Next, as a fifth stage, as shown in FIG. 24, the drain pipe 4, the steel pipe 22, and the wire 24 are inserted into the outer pipe 2 with the stopper member 7 at the top.
At the time of insertion, the blade portion 9 of the stopper member 7 and the blade portion 39 of the center riser 37 are centered and can be easily inserted with reduced sliding resistance. Since the drain pipe 4 is in point contact with the inner wall surface of the double pipe outer pipe 2 by the center riser 37, even a drain pipe having a total weight of about 100 kg can be manually pushed.

このとき、先頭の水抜き管4はストッパ部材7にボルト10Aによって固定する。また水抜き管4には適宜の間隔でセンタライザー37が取付けられ、継ぎ足しの連結部はソケット6で連結される。   At this time, the leading drain pipe 4 is fixed to the stopper member 7 with bolts 10A. A center riser 37 is attached to the drain pipe 4 at an appropriate interval, and the connecting portion of the extension is connected by the socket 6.

また、図示の構造では、先頭の鋼管22はストッパ部材7へ当接させているが、ワイヤ24を使用しない構造を採用する場合には、カバー15を使用せずに、ストッパ部材7に設けられた逆ねじ(左ねじ)の雄ねじ部13に、先端の鋼管22の逆ねじ(左ねじ)で構成された左雌ねじを螺合させる。
鋼管4の継ぎ足し締結は、通常の右ねじ螺合によって行うが、鋼管22同士を溶接により結合しても良い。
Further, in the structure shown in the drawing, the leading steel pipe 22 is brought into contact with the stopper member 7. However, when a structure in which the wire 24 is not used is adopted, the cover 15 is not used and the stopper member 7 is provided. A left female screw constituted by a reverse screw (left screw) of the steel pipe 22 at the tip is screwed into the male screw portion 13 of the reverse screw (left screw).
The steel pipe 4 is fastened and fastened by normal right-hand threading, but the steel pipes 22 may be joined together by welding.

ワイヤ24の後端部は、長ボルト26(図11)の回動フック32にクリップ24aによって結合する。   The rear end portion of the wire 24 is coupled to a rotating hook 32 of a long bolt 26 (FIG. 11) by a clip 24a.

そして、最終の水抜き管4を連結した後に、最後の鋼管22の後端部にキャップ40を当て、長ボルト26を孔42に貫通させ、ナット44で固定させる。そして、ナット44を締め付けて、ワイヤ24を緊張させる。
以上で水抜き管固定装置1の所定配置が終了する。
And after connecting the last drain pipe 4, the cap 40 is applied to the rear-end part of the last steel pipe 22, the long volt | bolt 26 is penetrated to the hole 42, and it fixes with the nut 44. Then, the nut 44 is tightened to tension the wire 24.
The predetermined arrangement of the drain pipe fixing device 1 is thus completed.

次に、図25に示すように、削孔機能を有する機械Maを用いて、二重管の外管を時計回りに例えば20回転させたあとで、回転しながら引き抜く。このとき、先端のストッパ部材7が、薬液注入された領域Gsに固定されているので、ストッパ部材7に結合され且つ緊張力が付与されたワイヤ24が、外管2が引っ張られる力(引張り力)を受け持つので、水抜き管4自体が引っ張られることが無い。   Next, as shown in FIG. 25, the outer tube of the double tube is rotated, for example, 20 times clockwise using a machine Ma having a hole drilling function, and then pulled out while rotating. At this time, since the stopper member 7 at the tip is fixed to the region Gs into which the chemical solution has been injected, the wire 24 coupled to the stopper member 7 and applied with a tension force is a force (tensile force) that pulls the outer tube 2. ), The drain pipe 4 itself is not pulled.

また、水抜き管4が引っ張られないので、水抜き管4をソケット6にビス止めする必要が無い。二重管の外管2を引っ張る際に回転を加えても、ソケット6が空回りするので、当該回転が水抜き管4に加わることが無く、水抜き管4が捻じ切れてしまう事が防止される。   Further, since the drain pipe 4 is not pulled, it is not necessary to screw the drain pipe 4 to the socket 6. Even if a rotation is applied when pulling the outer pipe 2 of the double pipe, the socket 6 is idle, so that the rotation is not applied to the drain pipe 4 and the drain pipe 4 is prevented from being twisted. The

なお、水抜き管4に押し込み力を作用させる場合には、キャップ40及び鋼管22を介して押し込み力を負荷することができる。   In addition, when pushing force is applied to the drain pipe 4, the pushing force can be applied via the cap 40 and the steel pipe 22.

次に図26を参照して、薬液注入領域Gsに先端が配置された水抜き管4内の鋼管22を引き抜く。そのために、水抜き管4が鋼管22とともに引き抜かれないための準備をする。鋼管22を省略した構成を採用している場合には、上述した通り、鋼管22の引抜きは不要である。
地盤Gの羽口Pに固定された水抜きボックスの板体46に水抜き押さえ装置45を付設し、バンド取付部50の上部バンド53及び下部バンド52で水抜き管4を固定する。
次いで、図19、20に示した鋼管抜き取り部材61を鋼管22の端部の雄ねじ部22aに螺合締結させる。
Next, referring to FIG. 26, the steel pipe 22 in the water draining pipe 4 whose tip is disposed in the chemical liquid injection region Gs is drawn out. Therefore, preparation is made so that the drain pipe 4 is not pulled out together with the steel pipe 22. When adopting a configuration in which the steel pipe 22 is omitted, the steel pipe 22 need not be pulled out as described above.
A drainage holding device 45 is attached to the plate body 46 of the drainage box fixed to the tuyere P of the ground G, and the drainage pipe 4 is fixed by the upper band 53 and the lower band 52 of the band mounting portion 50.
Next, the steel pipe extraction member 61 shown in FIGS. 19 and 20 is screwed and fastened to the male screw portion 22 a at the end of the steel pipe 22.

次に図27を参照して、鋼管抜き取り部材61を機械Maによって地盤Gの外部に引き抜く。引き抜き前に鋼管22同士の連結を確実にするため、鋼管22を時計方向に回転させる。
ワイヤ24を省略している場合には、鋼管22の先頭部をストッパ部材7に逆ねじで螺合締結させているので、鋼管22をさらに時計方向に回転させることにより、逆ねじの作用によって鋼管22とストッパ7とを分離せしめ、(ストッパ7を切羽側先端に残存させた状態で)鋼管22を引き抜くことができる。
最後に、鋼管抜き取り部材61をはずして、水抜き管4の配設が完了する。
Next, referring to FIG. 27, the steel pipe extracting member 61 is pulled out of the ground G by the machine Ma. In order to ensure the connection between the steel pipes 22 before drawing, the steel pipes 22 are rotated clockwise.
When the wire 24 is omitted, the top portion of the steel pipe 22 is screwed and fastened to the stopper member 7 with a reverse screw. Therefore, by rotating the steel pipe 22 further in the clockwise direction, the steel pipe 22 is rotated by the action of the reverse screw. 22 and the stopper 7 can be separated, and the steel pipe 22 can be pulled out (with the stopper 7 remaining at the front end of the face).
Finally, the steel pipe extraction member 61 is removed, and the arrangement of the drain pipe 4 is completed.

図示の実施形態はあくまでも例示であり、本発明の技術的範囲を限定する趣旨の記述ではない旨を付記する。   It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

本発明の水抜き管配設工法に使用する水抜き管固定装置の主要部を示す側断面図である。It is a sectional side view which shows the principal part of the drain pipe fixing device used for the drain pipe arrangement method of this invention. ストッパ部材の正面図である。It is a front view of a stopper member. 同上の側面図である。It is a side view same as the above. ストッパ部材に取付けられるカバーの側面図である。It is a side view of the cover attached to a stopper member. 水抜き管の側断面図である。It is a sectional side view of a drain pipe. ソケット(水抜き管の継ぎ手)の斜視側面図である。It is a perspective side view of a socket (a joint of a drain pipe). ソケットと水抜き管の関係を示す側断面図である。It is a sectional side view which shows the relationship between a socket and a drain pipe. センタライザーの正面図である。It is a front view of a center riser. 同上の側面図である。It is a side view same as the above. 剛性部材(鋼管)の側面図である。It is a side view of a rigid member (steel pipe). ワイヤ緊張用の長ボルトの側面図である。It is a side view of the long bolt for wire tension. キャップの側面図である。It is a side view of a cap. 同上の正面図である。It is a front view same as the above. 水抜き管抑え装置の側面図である。It is a side view of a drain pipe control device. 同上のバンド取付部の正面図である。It is a front view of a band attachment part same as the above. 同上の側面図である。It is a side view same as the above. 上部バンドの正面図である。It is a front view of an upper band. 同上の側面図である。It is a side view same as the above. 鋼管抜き取り部材の正面図である。It is a front view of a steel pipe extraction member. 同上の側面図である。It is a side view same as the above. 本発明による水抜き管配設工法の2重管による地盤の削孔を示す側面図である。It is a side view which shows the drilling of the ground by the double pipe of the drain pipe arrangement method by this invention. 同上の止水薬液注入を示す側面図である。It is a side view which shows water-stopping chemical | medical solution injection same as the above. 削孔された孔を洗浄し、内管を引き抜く状態を示す側面図である。It is a side view which shows the state which wash | cleans the drilled hole and pulls out an inner tube | pipe. 水抜き管、鋼管およびワイヤをまとめる状態を示す側面図である。It is a side view which shows the state which puts together a drain pipe, a steel pipe, and a wire. 外管引き抜きを示す側面図である。It is a side view which shows outer tube extraction. 鋼管引き抜き用バンドの取付け状態を示す側面図である。It is a side view which shows the attachment state of the band for steel pipe extraction. 鋼管を引き抜いた状態を示す側面図である。It is a side view which shows the state which pulled out the steel pipe. 従来の水抜き管を示す側面図である。It is a side view which shows the conventional drain pipe. 同上の正面図である。It is a front view same as the above.

符号の説明Explanation of symbols

G・・・地盤
Gs・・・薬液注入領域(地盤止水強化領域)
C・・・環状空間
1・・・水抜き管固定装置
2・・・外管
3・・・2重管
4・・・水抜き管
5・・・水路
6・・・ソケット
7・・・ストッパ部材
8・・・管部
8a・・・フランジ部
9・・・羽根部
10・・・孔
11・・・フック座
12・・・回動フック
13・・・雄ねじ部
14・・・雌ねじ部
15・・・カバー
16・・・蓋
17・・・孔
22・・・剛性部材(ガイド鋼管)
24・・・線状部材(ワイヤ)
26・・・長ボルト
26a・・・ねじ部
27・・・頭部
27a・・・座
32・・・回動フック
37・・・センタライザー
38・・・輪部
39・・・羽根部
40・・・キャップ
41・・・フランジ
42・・・孔
45・・・水抜き管抑え装置
46・・・止水ボックスの板体
47・・・筒体
48・・・フランジ
50・・・バンド取付部
52・・・下部バンド
53・・・上部バンド
61・・・(鋼管)抜取り部材
G ... Ground Gs ... Chemical solution injection area (Ground water stop strengthening area)
C: annular space 1 ... drain pipe fixing device 2 ... outer pipe 3 ... double pipe 4 ... drain pipe 5 ... water channel 6 ... socket 7 ... stopper Member 8 ... Tube part 8a ... Flange part 9 ... Blade part 10 ... Hole 11 ... Hook seat 12 ... Turning hook 13 ... Male thread part 14 ... Female thread part 15 ... Cover 16 ... Lid 17 ... Hole 22 ... Rigid member (guide steel pipe)
24 ... Linear member (wire)
26 ... Long bolt 26a ... Screw part 27 ... Head 27a ... Seat 32 ... Turning hook 37 ... Center riser 38 ... Ring part 39 ... Blade part 40 .... Cap 41 ... Flange 42 ... Hole 45 ... Drain pipe restraint device 46 ... Plate body of water stop box 47 ... Cylindrical body 48 ... Flange 50 ... Band attachment part 52 ... Lower band 53 ... Upper band 61 ... (Steel pipe) extraction member

Claims (1)

削孔管(2)で地盤(G)を削孔する削孔工程と、削孔管(2)内に水抜き管(4)を挿入する水抜き管挿入工程と、削孔管(2)を回転しながら引き抜く削孔管引抜工程とを有し、該削孔管引抜工程では、水抜き管(4)に鋼管(22)を通すと共に水抜き管(4)の先端部にストッパ部材(7)を設け、削孔管(2)先端から地盤(G)に薬液を注入してストッパ部材(7)を固定し、管の内部に配置された線状部材(24)の一端をストッパ部材(7)に接続し、その線状部材(24)の他端を鋼管(22)の後端部のキャップ(40)に接続して該線状部材(24)に張力を付与し、削孔管(2)を引き抜く際の引張力を線状部材(24)に負わせることを特徴とする水抜き管配設工法。 Drilling process for drilling ground (G) with drilling pipe (2), draining pipe insertion process for inserting drainage pipe (4) into drilling pipe (2), drilling pipe (2) A drilling tube withdrawing process while rotating the steel tube (22) through the drainage pipe (4) and at the tip of the drainage pipe (4) with a stopper member ( 7) is provided, and the stopper member (7) is fixed by injecting a chemical solution from the tip of the drilled tube (2) to the ground (G), and one end of the linear member (24) disposed inside the tube is connected to the stopper member (7), the other end of the linear member (24) is connected to the cap (40) at the rear end of the steel pipe (22) to apply tension to the linear member (24), A drainage pipe disposing method characterized in that the linear member (24) is subjected to a tensile force when the pipe (2) is pulled out.
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JP5096275B2 (en) * 2008-09-16 2012-12-12 鹿島建設株式会社 Water drain pipe burying method and water drain pipe
JP5854663B2 (en) * 2011-06-29 2016-02-09 株式会社ジェイテック Water collecting pipe unit and installation method of water collecting pipe for horizontal well using it
JP6338088B2 (en) * 2014-05-07 2018-06-06 清水建設株式会社 Construction method of liquefaction countermeasure drain
JP6755469B2 (en) * 2016-04-28 2020-09-16 信也 馬場 Retaining tube joint disconnection prevention device
JP6916018B2 (en) * 2017-03-28 2021-08-11 日鉄建材株式会社 Flange structure of fitting member
JP7004889B2 (en) * 2018-05-14 2022-01-21 株式会社建設技術研究所 Rotary press-fitting / drainage pipe device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH081605U (en) * 1996-06-20 1996-11-22 株式会社大阪防水建設社 Drainage pipe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH081605U (en) * 1996-06-20 1996-11-22 株式会社大阪防水建設社 Drainage pipe

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