JP2808096B2 - Continuous impermeable wall construction method - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ビルの基礎工事や
地下鉄等トンネル開削工事、あるいはトンネルの掘削推
進用発進・到達立坑の構築等の際に、地盤の掘削面を支
えると共に漏水を防ぐ連続遮水壁構築工法であって、遮
水壁を様々な角度に折曲して連続する平面配置にできる
と共に、容易かつ経済的に十分な遮水性と強度を備えた
構造に構築できる、連続遮水壁構築工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous construction for supporting a ground excavation surface and preventing water leakage during foundation work for a building, tunnel excavation work for a subway, or construction of a starting / reaching shaft for tunnel excavation promotion. This is a method of constructing a water barrier, which can be bent at various angles to form a continuous plane arrangement, and can be constructed easily and economically into a structure with sufficient water barrier and strength. Water wall construction method.

【０００２】[0002]

【従来の技術】ビルなどの基礎工事や、地下鉄等のトン
ネル開削工事、下水道等のトンネル推進工事用発進・到
達立坑の構築、道路や排水路の構築、大口径管の埋設等
の際の地盤の掘下げと、これに伴う土止め・遮水には、
従来から、掘削面位置に鋼矢板を連続してほとんど隙間
なく打込んだ後、鋼矢板に沿って地盤の掘削を行う方法
（鋼矢板工法）あるいは、掘削面位置に溝状の穴を掘削
し、この穴に鉄筋を建込んでからコンクリートを打設し
て、鉄筋コンクリート製の剛強な壁体を土止め・遮水壁
とし、これに沿って地盤を掘削する方法（連続地中壁工
法）などが一般的に用いられていた。これら従来の方法
のうち、鋼矢板工法は、比較的短期間の作業で十分な遮
水性と強度を備えた遮水壁を構築できるが、鋼矢板の掘
削面位置への設置は、全てハンマー等の機械による打込
みで行われ、この打込みの際に大きな振動や騒音が発生
するため、作業可能な場所が限られた。そして、機械に
よる打込み作業は大がかりになってしまい、作業性が悪
く狭い場所での実施が難しかった。また、同形状の鋼矢
板をほとんど隙間なく配置する関係上、各鋼矢板を隣り
合う他の鋼矢板に対し大きく向きを変えて配置するのは
難しく、遮水壁を自由に折曲させた平面形状にすること
はできなかった。もう一方の、連続地中壁工法は、溝状
の孔や鉄筋の配置に制約がなく、遮水壁を自由に折曲さ
せた平面形状にすることができるが、溝状の削孔は、孔
内へ入れた水の静水圧やベントナイト等の安定液の注入
等で孔壁を維持しながら掘削を行うため、手間とコスト
がかかる上、鉄筋の配置や打設したコンクリートの硬化
等に時間を要し、工期が長くなってしまった。2. Description of the Related Art Construction of foundations for buildings and the like, tunnel excavation work for subways, construction of starting and reaching shafts for tunnel propulsion work such as sewerage, construction of roads and drainage channels, burial of large diameter pipes, etc. For the digging of the ground,
Conventionally, a steel sheet pile is continuously driven into the excavation surface position with almost no gap, and then the ground is excavated along the steel sheet pile (steel sheet pile method) or a grooved hole is excavated at the excavation surface position. A method of excavating the ground along with a reinforced concrete wall that is used as a retaining wall or impermeable wall by placing concrete after reinforcing steel is built in this hole (continuous underground wall method), etc. Was commonly used. Of these conventional methods, the steel sheet pile method can construct a water impervious wall with sufficient water impermeability and strength in a relatively short period of time. The location where work can be performed is limited because large vibrations and noises are generated at the time of the driving. Then, the driving work by the machine becomes large, and the workability is poor, and it is difficult to perform the work in a narrow place. In addition, because steel sheet piles of the same shape are arranged with almost no gaps, it is difficult to arrange each steel sheet pile with a large change in direction with respect to the other steel sheet piles adjacent to it, and a flat surface where the impermeable wall is freely bent It could not be shaped. On the other hand, the continuous underground wall construction method has no restriction on the arrangement of grooved holes and reinforcing bars, and it is possible to make the impermeable wall into a flat shape that is freely bent. Excavation is performed while maintaining the hole wall by hydrostatic pressure of the water introduced into the hole or injection of a stable liquid such as bentonite, etc., which is troublesome and costly, and it takes time to arrange reinforcing bars and harden concrete poured in. Required, and the construction period became longer.

【０００３】[0003]

【発明が解決しようとする課題】本発明が解決しようと
する課題は、上記した問題点を解消し、十分な遮水性と
強度を備える連続した遮水壁を自由に折曲させた平面形
状に構築できる上、振動・騒音を発生せず、地上で大型
の機械を用いずに済み、工事対象や現場環境の制約を受
けずに工事が進められ、また、施工が容易で工期が短期
間で行え経済性が高い、連続遮水壁構築工法を提供する
ことにある。The problem to be solved by the present invention is to solve the above-mentioned problems and to form a continuous water-impervious wall having a sufficient water-impermeability and strength into a freely bent plane shape. It can be constructed, does not generate vibration and noise, does not require large machines on the ground, construction can proceed without restrictions on the construction target and site environment, and it is easy to construct and the construction period is short. It is an object of the present invention to provide a continuous impermeable wall construction method which is highly economical.

【０００４】[0004]

【課題を解決するための手段】かかる課題を解決した本
発明の構成は、 １） 地盤に所定深さの孔を削孔し、長い筒体の下端部
の二箇所にワイヤロープ案内用のガイドを設けると共に
筒体長さより二倍以上長い二組のワイヤロープを各ガイ
ドで折り返して筒体内と筒体外に沿うようにして移動自
在にそれぞれ設けた構造とした建込材を、削孔した孔に
各ワイヤロープの端が全て地上に露出するよう挿入して
設置し、同様にして地盤に所定間隔で建込材を設置した
後、地盤を切り分ける刃先を下端に設けた地中推進刃を
隣り合う二つの建込材間の地面に配置し、二つの建込材
のそれぞれ向き合う側にある各ワイヤロープの筒体外か
ら地上に露出させた端を地中推進刃に結着し、結着した
ワイヤロープの筒体内から地上に露出させた端をワイヤ
ロープの巻取り装置に巻取り、この二つの建込材が上昇
しないようにそれぞれ押え手段で地面から押さえつけた
状態で、巻取り装置を作動させてそれぞれのワイヤロー
プを巻取り、建込材の間で地中推進刃を引っ張り下げて
ワイヤロープと共に地盤を切り分けて下方に推進させな
がら、ワイヤロープと地中推進刃が通過してできた地盤
の空間に硬化材を注入し、地中推進刃が筒体の下端部の
ガイド位置まで達したら地中推進刃を逆に引き上げて地
盤から抜き、建込材間の空間に充填された硬化材をその
まま硬化させ遮水性のある壁体を形成すると共に、硬化
材の硬化する前に隣接する各建込材間で向き合う側でな
い残りのワイヤロープを用いて同様の作業を繰返して壁
体を連続させ、完全に硬化させて地盤に遮水壁を構築す
ることを特徴とする、連続遮水壁構築工法 ２） 前記地中推進刃の下端の刃先に硬化材の噴射口を
所要数設け、この噴射口と硬化材の注入ホースを接続
し、建込材の間で地中推進刃を引っ張り下げたり引き上
げたりするのと同時に注入ホースを通じて硬化材を送り
込んで地中推進刃の刃先の噴射口から噴射させ、地盤の
空間へ硬化材を充填する、前記１）に記載の連続遮水壁
構築工法 ３） 建込材のワイヤロープを巻取る巻取り装置を、建
込材の押え手段として建込材上端を押さえ付けるように
据付ける、前記１）又は２）に記載の連続遮水壁構築工
法 ４） 地盤に挿入した全ての隣り合う建込材の間で注入
した硬化材で壁体を構築して連続させた後、地盤を掘下
げて連続する壁体を露出させ、さらに露出した壁体の一
部を削って各建込材の表面を露出させ、各建込材間にこ
れらの建込材を連結する補強板を取付け、補強板と壁体
の間の削られた隙間に硬化する裏込め材を充填する、前
記１）〜３）いずれか記載の連続遮水壁構築工法 ５） 前記建込材を、長い角パイプの平行な一組の側面
の最下部にガイドとして二つのプーリを平行にそれぞれ
回動自在に取付けて、二組のロープをプーリにかけて折
り返して設けた構造として用いる、前記１）〜４）いず
れか記載の連続遮水壁構築工法にある。Means for Solving the Problems The structure of the present invention which has solved the above problems is as follows: 1) A hole having a predetermined depth is drilled in the ground, and guides for guiding a wire rope are provided at two places at the lower end of a long cylindrical body. In addition, two sets of wire ropes that are at least twice as long as the length of the cylindrical body are folded back with each guide, and the building materials are structured so that they can move freely along the cylindrical body and outside the cylindrical body. Insert and install so that all ends of each wire rope are exposed on the ground, install building materials at predetermined intervals on the ground in the same way, and adjoin underground propulsion blades with cutting edges that cut the ground at the lower end A wire which is placed on the ground between two building materials, and the end of each wire rope on each of the facing sides of the two building materials, which is exposed from the outside of the cylinder to the ground, is tied to the underground propulsion blade, and the tied wire Connect the exposed end of the rope In a state where the two building materials are pressed down from the ground by holding means so that the two building materials do not rise, the winding devices are operated to wind each wire rope, and the building materials are wound up. While pulling down the underground propulsion blade in between and cutting the ground together with the wire rope and propelling downward, the hardening material is injected into the space of the ground formed by the wire rope and the underground propulsion blade, and the underground propulsion blade When it reaches the guide position at the lower end of the cylindrical body, the underground propulsion blade is pulled up and pulled out of the ground, and the hardening material filled in the space between the building materials is hardened as it is to form a water-shielding wall At the same time, before the hardening material hardens ,
The same work is repeated by using the remaining wire ropes to make the wall continuous, and completely hardened to construct the impermeable wall on the ground. A required number of injection ports of hardening material are provided at the cutting edge at the lower end of the propulsion blade, and this injection port is connected to a hardening material injection hose, and at the same time as the underground propulsion blade is pulled down or raised between building materials by feeding hardener through the injection hose is ejected from the ejection nozzle of the cutting edge of the ground propulsion blades, filling the hardener to the land board space, continuous water-impervious wall construction method 3 according to above 1)) of Kenkomi material The continuous impermeable wall construction method according to the above 1) or 2), wherein the winding device for winding the wire rope is installed so as to press the upper end of the building material as a means for holding the building material 4) Inserted into the ground. Build walls with hardened material injected between all adjacent building materials After excavating the ground, exposing the continuous wall by excavating the ground, further excavating a part of the exposed wall to expose the surface of each building material, and between these building materials, these building materials 5. A method for constructing a continuous impermeable wall according to any one of 1) to 3) above, wherein a reinforcing backing material is attached to the shaved gap between the reinforcing plate and the wall body. The batting material is used as a structure in which two pulleys are rotatably mounted in parallel as guides at the bottom of a pair of parallel side surfaces of a long square pipe, respectively, and two sets of ropes are folded over the pulleys and provided. 1) to 4) The continuous impermeable wall construction method described in any one of the above.

【０００５】[0005]

【作用】本発明の連続遮水壁構築工法では、地盤に対し
て、まず、所定の深さまで削孔を行う。そして、用意し
た建込材を、この削孔した孔に各ワイヤロープの端が全
て地上に露出するよう挿入して設置する。このような削
孔と建込材設置を所定間隔に所要数行う。この後、一対
の隣り合う建込材間の地面に地中推進刃を配置し、それ
ぞれの建込材の二組のワイヤロープのうち、隣り合った
建込材の二組のワイヤロープのうち、隣り合った建込材
に向き合う側の各ワイヤロープの、建込材の筒体外から
地上に露出させた端を地中推進刃にそれぞれ取付ける。
地中推進刃に取付けた二つのワイヤロープのもう一方の
筒体内から地上に露出させた端は、ワイヤロープを巻取
る巻取り装置にそれぞれ接続し、巻取り可能にしてお
く。地中推進刃を間に配置した二つの建込材は、それぞ
れ地面から押え手段で押さえつけるようにして、ワイヤ
ロープを巻取る反動で上方に動くのを防ぐ。巻取り装置
でそれぞれのワイヤロープを巻取ると、建込材のガイド
で向きを変えたワイヤロープを介して地中推進刃が下向
きに引張られ、下端の刃先で地盤を切り分けて推進す
る。ワイヤロープのガイドから地中推進刃までの部分
も、地中推進刃と共に地盤を切り分けながら下がってい
く。地中推進刃を下方へ推進させながら、地盤の地中推
進刃およびワイヤロープが通った部分に硬化材を注入し
ていき、これらの推進により生じる空間を逐次硬化材で
埋めて、この空間を保持して地中推進刃が崩れた土砂で
埋設するのを防ぐ。地中推進刃の下端の刃先が建込材の
ガイド位置まで達したら、ワイヤロープの巻取りを止
め、硬化材の注入を続けながら地中推進刃を逆に引き上
げていく。地中推進刃の下側にも硬化材が入り込んで空
間を埋めていく。地中推進刃を地上まで引き上げたら、
硬化材の注入を止める。この隣り合う建込材の間の地中
推進刃やワイヤロープが通ってできた空間、そしてドリ
ルパイプを抜いた後の建込材と地盤の間の隙間を隅々ま
で埋めた状態の注入剤の硬化材はそのまま硬化させ、遮
水性のある壁体とする。この硬化材が硬化する前に、そ
れぞれ隣接する建込材間で同様の作業を行い、さらに隣
接する建込材間で硬化材の硬化前に次々と同様の作業を
繰返して、設置した全ての建込材間で壁体を連続させ、
これらを完全に硬化させて地盤の遮水壁とする。According to the continuous impermeable wall construction method of the present invention, the ground is first drilled to a predetermined depth. Then, the prepared building material is inserted and installed in the hole thus drilled so that all ends of each wire rope are exposed to the ground. A required number of such drilling and installation of the building material are performed at predetermined intervals. Thereafter, an underground propulsion blade is arranged on the ground between a pair of adjacent building materials, and among the two sets of wire ropes of each building material, of the two sets of wire ropes of the adjacent building materials, Then, the end of each wire rope facing the adjacent building material, which is exposed to the ground from outside the cylindrical body of the building material, is attached to the underground propulsion blade.
The ends of the two wire ropes attached to the underground propulsion blade, which are exposed to the ground from the other cylinder, are connected to winding devices for winding the wire ropes, respectively, so that the wire ropes can be wound. The two building materials with the underground propulsion blades interposed therebetween are pressed from the ground by pressing means, respectively, to prevent the upward movement due to the recoil of winding the wire rope. When each of the wire ropes is wound by the winding device, the underground propulsion blade is pulled downward through the wire rope whose direction has been changed by the guide of the building material, and the ground is cut and propelled by the cutting edge at the lower end. The portion from the wire rope guide to the underground propulsion blade also goes down while cutting the ground together with the underground propulsion blade. While propelling the underground propulsion blade downward, the hardening material is injected into the part of the ground where the underground propulsion blade and the wire rope passed, and the space created by these propulsion is sequentially filled with the hardening material, and this space is filled. Hold to prevent underground propulsion blades from being buried in collapsed earth and sand. When the cutting edge at the lower end of the underground propulsion blade reaches the guide position of the building material, the winding of the wire rope is stopped, and the underground propulsion blade is pulled up while continuing to inject the hardening material. Hardening material also enters the underside of the underground propulsion blade to fill the space. After raising the underground propulsion blade to the ground,
Stop injection of hardener. An injecting agent that fills the space between the adjacent building materials through the underground propulsion blade and wire rope, and the gap between the building materials and the ground after removing the drill pipe to every corner Is hardened as it is to form a water-shielding wall. Before the hardened material is hardened, the same work is performed between the adjacent building materials, and between the adjacent built materials, the same work is repeated one after another before the hardened material is hardened. Make the wall continuous between the building materials,
These are completely hardened to form a ground impermeable wall.

【０００６】硬化材の注入を地中推進刃に設けた噴射口
から行う方法では、巻取り装置でワイヤロープを巻取っ
て建込材間で地中推進刃を下向きに引張るのと同時に注
入ホースから地中推進刃に硬化材を送り込んで刃先の噴
射口から噴射させる。地中推進刃は硬化材の噴射の圧力
で刃先の下方の土砂を削り取りながらスムーズに地盤を
切り分けて推進する。噴射後の硬化材は、地中推進刃お
よびワイヤロープが通った部分に流れてこれらを埋め
る。硬化材を噴射する地中推進刃の刃先がガイド位置ま
で達したら、ワイヤロープの巻取りを止め、硬化材を噴
射させたままで地中推進刃を逆に引き上げていく。地中
推進刃の下側に硬化材が噴射されて、確実に空間を埋め
ていく。地中推進刃を地上まで引き上げたら、硬化材の
噴射を止め、地盤に入れた硬化材を硬化させて壁体とす
る。In the method in which the hardening material is injected from an injection port provided in the underground propulsion blade, a wire rope is wound by a winding device, and the underground propulsion blade is pulled downward between the building materials, and at the same time, an injection hose is used. The hardening material is sent to the underground propulsion blade from below, and is injected from the injection port of the cutting edge. The underground propulsion blade smoothly propells the ground by cutting the soil under the cutting edge with the pressure of the hardening material being sprayed. The hardened material after the injection flows to the portion where the underground propulsion blade and the wire rope pass, and fills them. When the cutting edge of the underground propulsion blade that injects the hardening material reaches the guide position, the winding of the wire rope is stopped, and the underground propulsion blade is pulled up while the hardening material is being sprayed. The hardening material is sprayed below the underground propulsion blade to reliably fill the space. When the underground propulsion blade is raised to the ground, the injection of the hardening material is stopped, and the hardening material placed in the ground is hardened to form a wall.

【０００７】巻取り装置を建込材の押え手段として用い
る方法では、地中推進刃に取付けた各ワイヤロープのも
う一方の端を接続する巻取り装置は、建込材ごとに設
け、建込材の押え手段としてそれぞれ建込材を押さえる
位置に据付け、ワイヤロープを巻取り可能に接続する。
巻取り装置を作動させた際に巻取り装置と建込材がそれ
ぞれ反動で動こうとする力を打消し合って都合がよい。In the method in which the winding device is used as means for holding the building material, the winding device for connecting the other end of each wire rope attached to the underground propulsion blade is provided for each building material, and It is installed as a material holding means at a position for holding the building material, and a wire rope is connected so as to be wound up.
When the winding device is operated, it is convenient that the winding device and the building material cancel each other's forces to move in reaction.

【０００８】連続した壁体の各建込材間に補強板を取付
けると共に、壁体と補強板の間に裏込めを行う方法で
は、地盤への連続した壁体の構築後に、壁体に沿って地
盤を掘削し、壁体が露出したら、それぞれ隣り合う建込
材の間に、建込材を連結する補強板を取付け、隣り合う
建込材を一体化する。取付け後、補強板と、これを取付
けた建込材間の壁体との間の隙間に、硬化する裏込め材
を充填し、硬化させて、壁体に加わる地盤からの土圧を
補強板で後ろから支えられるようにし、確実に地盤を保
持させる。In a method in which a reinforcing plate is attached between building materials of a continuous wall and backfilling is performed between the wall and the reinforcing plate, the ground is constructed along the wall after the continuous wall is built on the ground. Is excavated, and when the wall is exposed, a reinforcing plate for connecting the building materials is attached between the adjacent building materials to integrate the adjacent building materials. After installation, the space between the reinforcing plate and the wall between the building materials to which it is attached is filled with hardening backfill material, which is hardened and the earth pressure from the ground applied to the wall is reduced by the reinforcing plate. So that it can be supported from behind with the ground securely.

【０００９】建込材として、筒体を角パイプとし、ガイ
ドとしてプーリを設けた構造のものを使用する方法で
は、巻取り装置でワイヤロープを巻取る際、ガイドでの
折り返しが、回動するプーリに案内されて行われ、摩擦
による抵抗が発生せず、スムーズに巻取りが行われる。In the method of using a structure in which a cylindrical body is a square pipe and a pulley is provided as a guide as a building material, when the wire rope is wound by a winding device, the folding back by the guide rotates. The operation is guided by the pulley, and the winding is smoothly performed without generating any resistance due to friction.

【００１０】[0010]

【発明の実施の形態】本発明の方法で使用する建込材の
筒体としては、角パイプの他、丸パイプや他の多角形断
面のものでもよく、地盤を掘下げる深さより根入れする
分長い寸法の鋼製としたものが一般的に用いられる。そ
して、筒体の下端部に設ける二つのガイドには、固定式
の滑らかな湾曲面の他、プーリやローラ等を用いて、ワ
イヤロープが、筒体内にスムーズに出入りできるよう、
ガイド方向が筒体外周と直交するように設けるのが望ま
しい。さらに、二つのガイドを筒体外周の互いに対向す
る位置に離して設け、各ガイドに沿わせるそれぞれのワ
イヤロープの位置を離し、筒体内で二つのワイヤロープ
が干渉しないようにするのが望ましい。BEST MODE FOR CARRYING OUT THE INVENTION The tubular body of the building material used in the method of the present invention may be a square pipe, a round pipe or another polygonal cross-section, and may be deeper than the ground. Those made of steel with longer length are generally used. The two guides provided at the lower end of the cylindrical body have a fixed smooth curved surface, as well as a pulley and a roller, so that the wire rope can smoothly enter and exit the cylindrical body.
It is desirable that the guide direction is provided so as to be orthogonal to the outer periphery of the cylindrical body. Further, it is preferable that the two guides are provided separately at positions facing each other on the outer periphery of the cylindrical body, and the positions of the respective wire ropes along the respective guides are separated so that the two wire ropes do not interfere in the cylindrical body.

【００１１】本発明の方法で使用する地中推進刃は、下
端に地盤へ食い込んで切り分ける刃先を設け、幅が隣り
合う建込材の間隔より少し小さい、くさび形で鋼製のも
のが一般的である。この地中推進刃は、刃先に噴射口を
設けると共に上部に注入ホースを接続し、硬化材を噴射
できる構造としてもよい。また、地中推進刃を引き上げ
る際に作業しやすいよう、あらかじめ引き上げ用として
地上に露出する長さのワイヤや棒等を地中推進刃に取付
けておくのが望ましい。The underground propulsion blade used in the method of the present invention is generally a wedge-shaped steel blade provided with a cutting edge at the lower end for cutting into the ground to cut the ground, and having a width slightly smaller than the interval between the adjacent building materials. It is. The underground propulsion blade may have a structure in which an injection port is provided at the cutting edge and an injection hose is connected to an upper portion of the blade so that a hardening material can be injected. In addition, it is desirable that a wire, a rod, or the like having a length exposed on the ground is previously attached to the underground propulsion blade for lifting so that the underground propulsion blade can be easily pulled up.

【００１２】本発明の方法で用いる硬化材としては、セ
メントミルクやグラウト、コンクリートが一般的であ
る。特に地中推進刃の刃先から噴射させる場合は、流動
性の高いセメントミルクやグラウトを使用するのが望ま
しい。また、補強板を取付けて裏込めを行う際に用いる
裏込め材も、硬化材同様のものでもかまわない。As the hardening material used in the method of the present invention, cement milk, grout and concrete are generally used. In particular, when spraying from the underground propulsion blade, it is desirable to use cement milk or grout having high fluidity. Further, the backfill material used for backfilling by attaching the reinforcing plate may be the same as the hardening material.

【００１３】本発明の方法でワイヤロープの巻取りに用
いる巻取り装置は、一台で二本のワイヤロープをまとめ
て巻取ってもかまわないが、それぞれのワイヤロープを
巻取る二台の巻取り装置を設け、それぞれの巻取り装置
で建込材の上端を押さえるように据付けて、巻取りの際
にワイヤロープから建込材下端部のガイドに加わる反力
に対して建込材を動かさないようにするのが望ましい。[0013] The winding device used for winding the wire rope in the method of the present invention may be a single device for winding two wire ropes together, but two winding devices for winding each wire rope may be used. Provide a take-up device and install it so that each winding device holds the upper end of the building material, and move the building material against the reaction force applied from the wire rope to the guide at the lower end of the building material during winding. It is desirable not to do so.

【００１４】[0014]

【実施例】本発明の実施例を図面に基づいて説明する。
本実施例は、建込材の筒体に角パイプを用いると共にガ
イドとして小型のプーリを用い、地中推進刃の噴射口か
ら硬化材を噴射するようにし、地盤の掘下げにより露出
させた壁体の建込材に補強板を取付け、裏込めを行う例
である。図１は実施例における削孔作業を示す説明図、
図２は実施例における建込材挿入作業を示す説明図、図
３は実施例におけるドリルパイプ引抜き作業を示す説明
図、図４は実施例における建込材挿入状態を示す平面
図、図５は実施例における建込材挿入状態を示す縦断面
図、図６は実施例における地中推進刃および巻取り装置
の配置状態を示す説明図、図７は実施例における地中推
進刃の推進および引上げ作業を示す説明図、図８は実施
例において地中推進刃を引上げた状態の地盤内部を示す
断面図、図９は実施例における壁体構築状態を示す平面
図、図１０は実施例における地盤の掘下げ作業を示す説
明図、図１１は実施例における補強板取付け作業を示す
説明図、図１２は実施例における裏込め材注入作業を示
す説明図、図１３は実施例による遮水壁の完成状態を示
す平面図、図１４は実施例による遮水壁の完成状態を示
す縦断面図である。An embodiment of the present invention will be described with reference to the drawings.
This embodiment uses a square pipe for the tubular body of the building material and uses a small pulley as a guide, injects the hardened material from the injection port of the underground propulsion blade, and exposes the wall body by excavating the ground This is an example in which a reinforcing plate is attached to the building material and backfilling is performed. FIG. 1 is an explanatory diagram showing a drilling operation in the embodiment,
FIG. 2 is an explanatory view showing a work for inserting a building material in the embodiment, FIG. 3 is an explanatory view showing a work of pulling out a drill pipe in the embodiment, FIG. 4 is a plan view showing a state of inserting the building material in the embodiment, and FIG. FIG. 6 is a longitudinal sectional view showing a state in which a building material is inserted in the embodiment, FIG. 6 is an explanatory view showing an arrangement state of the underground propulsion blade and the winding device in the embodiment, and FIG. FIG. 8 is a cross-sectional view showing the inside of the ground when the underground propulsion blade is pulled up in the embodiment, FIG. 9 is a plan view showing a wall construction state in the embodiment, and FIG. 10 is the ground in the embodiment. FIG. 11 is an explanatory diagram showing a reinforcing plate attaching operation in the embodiment, FIG. 12 is an explanatory diagram showing a backfill material injecting operation in the embodiment, and FIG. 13 is a completed impermeable wall according to the embodiment. FIG. 14 is a plan view showing the state. It is a longitudinal sectional view showing a completed state of the water shield wall by 施例.

【００１５】本実施例の連続遮水壁構築工法では、ま
ず、立坑１６を構築する地面１７の遮水壁１４を設ける
平面位置に、３００ｍｍ〜１０００ｍｍの範囲の所定間
隔で削孔機４による削孔位置を多数設定する。設定した
削孔位置において削孔機４でリング状のビット６を先端
に取付けたドリルパイプ５を回転させながら押込んで削
孔を行い、ドリルパイプ５を次ぎ足しつつ所定の深さま
で孔１９を設ける（図１参照）。この孔１９にドリルパ
イプ５を挿入したままで、ドリルパイプ５内に地上から
遮水壁１４構築用の建込材１を挿入する（図２参照）。
建込材１は、地面１７からの掘下げ深さより根入れする
分長い角パイプ１ａの下端部にプーリ１ｂを二つ平行に
それぞれ回動自在に取付け、それぞれのプーリ１ｂを経
由して角パイプ１ａの中と外を通り両端が地上に露出す
る十分長い二本のワイヤロープ２，３を設けた構造で、
ドリルパイプ５内に入る大きさとなっている。建込材１
を根入れ深さまでドリルパイプ５内に挿入できたら、削
孔機４で先端のビット６ごとドリルパイプ５を全て引抜
いて建込材１を地中に残す（図３参照）。このような削
孔と建込材１挿入を全ての削孔位置に対して行った後、
所定間隔で隣り合う二つの建込材１の間で壁体１２の造
成を行っていく。始めに二つの建込材１の二組のワイヤ
ロープ２，３のうち、互いに向き合う側のそれぞれのワ
イヤロープ２の、角パイプ１ａ内を通った端を地上に据
付けた二台の巻取り装置７にそれぞれ接続し、巻取り可
能にする。巻取り装置７は、その脚部７ａで建込材１の
上端を押さえるよう据付けて、ワイヤロープ２を巻取る
際に建込材１が動かないようにしておく。それぞれのワ
イヤロープ２の巻取り装置７と接続した側と反対の角パ
イプ１ａ外を通って地上に露出した端は、二つの建込材
１の間の地面１７上に配置した地中推進刃８に、それぞ
れ固定する（図６参照）。地中推進刃８は造成する壁体
１２に平行としたくさび状の本体の上部に注入ホース９
を接続し、これを通して送られるセメントミルク１１
を、本体下端の刃先８ａに二箇所設けた噴射口８ｂから
下向きに高圧で噴射できる構造の鋼製の部材で、上部に
引抜き用のワイヤ１０を接続している。ワイヤロープ２
端をそれぞれ地中推進刃８に固定した後、巻取り装置７
をそれぞれ作動させてワイヤロープ２を巻取ると同時
に、地中推進刃８にセメントミルク１１を送り込んで刃
先８ａの各噴射口８ｂから噴射させる。建込材１下端部
のプーリ１ｂで向きを変えたワイヤロープ２を介して下
向きに引張られる地中推進刃８は、セメントミルク１１
の噴射の圧力で刃先８ａの下方の土砂を削り取りなが
ら、ワイヤロープ２と共に地盤１８を切り分けてスムー
ズに推進する。噴射されたセメントミルク１１は地中推
進刃８の上方や周囲の空間を埋めていく。ワイヤロープ
２の巻取りとセメントミルク１１の噴射を続けて、地中
推進刃８の刃先８ａが建込材１のプーリ１ｂ位置まで達
して、それより下に下げられなくなったら、二台の巻取
り装置７によるワイヤロープ２の巻取りを止める。そし
て、セメントミルク１１を噴射させたままで、引抜き用
のワイヤ１０を引き上げ、地中推進刃８を引張り上げ
る。この時、巻取り装置７は逆回転できるようにして、
地中推進刃８を上昇させた分ワイヤロープ２を繰出せる
ようにする。地中推進刃８が上昇した後の空間には、噴
射したセメントミルク１１が充填されていく（図７，図
８参照）。地中推進刃８を地面１７まで引き上げたら、
セメントミルク１１の噴射を止め、ワイヤロープ２の固
定を外して地中推進刃８を別の建込材１の間に移す。地
中推進刃８を外したワイヤロープ２は再び巻取り装置７
で巻取って地上に全て回収する。地中推進刃８を抜き取
った後の二つの建込材１の間では、地中推進刃８やワイ
ヤロープ２が通過した空間に充填されたり、その周囲に
浸透したりしたセメントミルク１１が硬化することによ
って水を通さない壁体１２が形成される。セメントミル
ク１１が硬化してしまう前に、それぞれ隣接する建込材
１間でも同様の作業を行い、さらに次々と隣接する各建
込材１間で隣りで前に充填したセメントミルク１１の完
全硬化前に同様の作業を繰返して、全ての建込材１間に
セメントミルク１１を充填し、連結した壁体１２を完全
に硬化させて構築する（図９参照）。連続した壁体１２
の構築後、壁体１２の内側の地盤１８を壁体１２に沿っ
て削孔していき（図１０参照）、露出した壁体１２をさ
らに一部削って建込材１の表面を露出させる。そして、
隣り合う建込材１間に鋼製の補強板１３を溶接により逐
次取付けていく（図１１参照）。取付けた補強板１３と
壁体１２間に隙間がある場合は、その隙間に裏込め材と
してセメントミルク１１を充填する（図１２参照）。壁
体１２の内側を設定した深さまで掘り下げながら前記同
様の作業を繰返して、十分な強度の連続した遮水壁１４
を構築し、さらに底１５を平らに造成したら、作業が完
了し、遮水壁１４に囲まれた立坑１６が完成する（図１
３，１４参照）。In the continuous water impermeable wall construction method of this embodiment, first, the drilling machine 4 cuts the ground 17 on which the shaft 16 is to be constructed at a predetermined position in the range of 300 mm to 1000 mm at the plane position where the water impermeable wall 14 is provided. Set many hole positions. At the set drilling position, drilling is performed by rotating the drill pipe 5 with the ring-shaped bit 6 attached to the tip with a drilling machine 4 while rotating the drill pipe 5, and a hole 19 is provided to a predetermined depth while adding the drill pipe 5. (See FIG. 1). With the drill pipe 5 inserted into the hole 19, the building material 1 for constructing the impermeable wall 14 is inserted into the drill pipe 5 from the ground (see FIG. 2).
The building material 1 is provided with two pulleys 1b rotatably mounted in parallel at the lower end of a square pipe 1a which is longer than the depth of the digging from the ground 17 and extends through the respective pulleys 1b. A structure with two long enough wire ropes 2 and 3 that pass through the inside and outside and are exposed on the ground at both ends.
It has a size that can fit inside the drill pipe 5. Building materials 1
Can be inserted into the drill pipe 5 to the depth of the penetration, the drill bit 4 is used to pull out the entire drill pipe 5 together with the bit 6 at the tip, and the building material 1 is left underground (see FIG. 3). After such drilling and insertion of the building material 1 for all drilling positions,
The wall 12 is formed between two adjacent building materials 1 at predetermined intervals. First, of two sets of wire ropes 2 and 3 of two building materials 1, two winding devices in which the ends of respective wire ropes 2 facing each other passing through the inside of the square pipe 1 a are installed on the ground. 7 so that it can be wound up. The winding device 7 is installed so as to press the upper end of the building material 1 with its leg 7a so that the building material 1 does not move when the wire rope 2 is wound. The end exposed on the ground through the outside of the square pipe 1a opposite to the side connected to the winding device 7 of each wire rope 2 is an underground propulsion blade arranged on the ground 17 between the two building materials 1. 8 (see FIG. 6). The underground propulsion blade 8 is provided with an injection hose 9 on the top of a wedge-shaped main body parallel to the wall 12 to be formed.
And cement milk 11 sent through it
Is a steel member having a structure capable of injecting a high pressure downward from two injection ports 8b provided at two positions on the cutting edge 8a at the lower end of the main body, and a wire 10 for pulling is connected to the upper part. Wire rope 2
After each end is fixed to the underground propulsion blade 8, the winding device 7
Are respectively operated to wind up the wire rope 2, and at the same time, the cement milk 11 is fed into the underground propulsion blade 8 to be jetted from each jet port 8b of the cutting edge 8a. The underground propulsion blade 8 pulled downward through the wire rope 2 turned by the pulley 1b at the lower end of the building material 1
The ground 18 is cut along with the wire rope 2 while the ground 18 is shaved off under the cutting edge 8a by the pressure of the jetting, and the ground 18 is smoothly propelled. The injected cement milk 11 fills the space above and around the underground propulsion blade 8. When the winding of the wire rope 2 and the injection of the cement milk 11 are continued, and the cutting edge 8a of the underground propulsion blade 8 reaches the position of the pulley 1b of the building material 1 and cannot be lowered below that, two windings are set. The winding of the wire rope 2 by the take-up device 7 is stopped. Then, while the cement milk 11 is being sprayed, the wire 10 for pulling out is pulled up, and the underground propulsion blade 8 is pulled up. At this time, the winding device 7 can be rotated in the reverse direction,
The wire rope 2 can be extended by an amount equivalent to raising the underground propulsion blade 8. The space after the underground propulsion blade 8 has been raised is filled with the injected cement milk 11 (see FIGS. 7 and 8). After raising the underground propulsion blade 8 to the ground 17,
The injection of the cement milk 11 is stopped, the wire rope 2 is released, and the underground propulsion blade 8 is moved between the other building materials 1. The wire rope 2 with the underground propulsion blade 8 removed is taken up again by the winding device 7.
And collect it all on the ground. Between the two building materials 1 after the underground propulsion blade 8 has been extracted, the cement milk 11 that has been filled in the space through which the underground propulsion blade 8 and the wire rope 2 have passed or has penetrated therearound is hardened. By doing so, a wall 12 impermeable to water is formed. Before the cement milk 11 is hardened, the same operation is performed between the adjacent building materials 1, and further, between the adjacent building materials 1, one after another, the hardening of the cement milk 11 which has been previously filled next to each other is completed. The same operation is repeated before, and the cement milk 11 is filled between all the building materials 1 and the connected wall bodies 12 are completely hardened and constructed (see FIG. 9). Continuous wall 12
After the construction, the ground 18 inside the wall 12 is drilled along the wall 12 (see FIG. 10), and the exposed wall 12 is further partially cut to expose the surface of the building material 1. . And
Steel reinforcing plates 13 are sequentially attached between adjacent building materials 1 by welding (see FIG. 11). If there is a gap between the attached reinforcing plate 13 and the wall body 12, the gap is filled with cement milk 11 as a backfill material (see FIG. 12). The same operation as described above is repeated while digging the inside of the wall body 12 to a set depth, so that the continuous impermeable wall 14 having sufficient strength is formed.
When the bottom 15 is made flat and the work is completed, the shaft 16 surrounded by the impermeable wall 14 is completed (FIG. 1).
3, 14).

【００１６】[0016]

【発明の効果】本発明は、上記した方法を採用すること
により、互いの配置に関係なく隣り合う建込材間でワイ
ヤロープを介して地中推進刃を動かし、壁体を構築する
ことができ、壁体からなる連続した遮水壁の平面配置形
状の自由度が高い、そして、地上で大型の杭打込装置や
削孔装置を使う必要がなく、これらの設置スペースが不
要なことに加え、作業の際の振動・騒音も少なく抑えら
れ、周囲に悪影響を与えず作業場所を選ばない。また、
小型で移動しやすい機材を利用でき、作業をすみやかに
連続させて行え、作業性がよく、手間とコストを減らし
て工期を短縮できる。According to the present invention, by adopting the above-described method, the underground propulsion blade can be moved via the wire rope between the adjacent building materials regardless of the mutual arrangement to construct the wall. It has a high degree of freedom in the layout of the continuous impermeable walls consisting of wall bodies, and there is no need to use large pile driving equipment or drilling equipment on the ground, and these installation spaces are unnecessary. In addition, vibration and noise during work can be suppressed to a small extent, and there is no adverse effect on the surroundings, and any work place can be selected. Also,
Small and easy-to-move equipment can be used, work can be performed quickly and continuously, workability is good, labor and cost can be reduced, and the construction period can be shortened.

【００１７】硬化材の注入を地中推進刃に設けた噴射口
から行う方法を採用すると、噴射した硬化材の圧力で土
砂を削る地中推進刃の推進がよりスムーズになり、作業
時間を短縮できる。そして、硬化材を高圧で噴射するこ
とで確実に地盤の間隙の隅々まで充填でき、硬化後の壁
体の強度が高い。If the method of injecting the hardening material from the injection port provided in the underground propulsion blade is adopted, the propulsion of the underground propulsion blade for cutting the earth and sand by the pressure of the injected hardening material becomes smoother, and the working time is shortened. it can. Then, by injecting the hardening material at a high pressure, it can be surely filled into every corner of the ground gap, and the strength of the hardened wall body is high.

【００１８】巻取り装置を建込材の押え手段として用い
る方法を採用すると、巻取り装置を作動させた際に巻取
り装置と建込材がそれぞれ反動で動こうとするのを打消
し合って互いに静止した状態にでき、それぞれを固定す
る手段を特に設けずに済み、実用性が高い。If a method is used in which the winding device is used as the holding means for the building material, the winding device and the building material are counteracted to move in reaction with each other when the winding device is operated. Since they can be kept stationary with each other, there is no need to particularly provide a means for fixing each of them, which is highly practical.

【００１９】連続した壁体の各建込材間に補強板を取付
けると共に、壁体と補強板の間に裏込めを行う方法を採
用すると、地盤からの土圧を壁体と補強板の両方で支え
ることができ、連続した遮水壁の強度が大きく向上し、
地盤の保持がより確実となり、安全性が高い。When a method is employed in which a reinforcing plate is attached between the building materials of a continuous wall and backfilling is performed between the wall and the reinforcing plate, earth pressure from the ground is supported by both the wall and the reinforcing plate. Can greatly improve the strength of continuous impermeable walls,
The ground is more securely held and the safety is high.

【００２０】建込材として、筒体を角パイプとしガイド
としてプーリを設けた構造のものを使用する方法を採用
すると、ワイヤロープの巻取りの際の抵抗が少なく、よ
り小さい力で巻取りが行え、巻取り装置を小型・低コス
ト化できる。If a method is used in which a tubular member is formed as a square pipe and a pulley is provided as a guide, the resistance at the time of winding the wire rope is small, and the winding can be performed with a smaller force. It is possible to reduce the size and cost of the winding device.

【図面の簡単な説明】[Brief description of the drawings]

【図１】実施例における削孔作業を示す説明図である。FIG. 1 is an explanatory diagram showing a drilling operation in an embodiment.

【図２】実施例における建込材挿入作業を示す説明図で
ある。FIG. 2 is an explanatory view showing a work for inserting a building material in the embodiment.

【図３】実施例におけるドリルパイプ引抜き作業を示す
説明図である。FIG. 3 is an explanatory diagram showing a drill pipe drawing operation in the embodiment.

【図４】実施例における建込材挿入状態を示す平面図で
ある。FIG. 4 is a plan view showing a state in which a building material is inserted in the embodiment.

【図５】実施例における建込材挿入状態を示す縦断面図
である。FIG. 5 is a longitudinal sectional view showing a state where a building material is inserted in the embodiment.

【図６】実施例における地中推進刃および巻取り装置の
配置状態を示す説明図である。FIG. 6 is an explanatory view showing an arrangement state of an underground propulsion blade and a winding device in the embodiment.

【図７】実施例における地中推進刃の推進および引上げ
作業を示す説明図である。FIG. 7 is an explanatory diagram showing a propulsion and pull-up operation of the underground propulsion blade in the embodiment.

【図８】実施例において地中推進刃を引上げた状態の地
盤内部を示す断面図である。FIG. 8 is a sectional view showing the inside of the ground in a state where the underground propulsion blade is pulled up in the embodiment.

【図９】実施例における壁体構築状態を示す平面図であ
る。FIG. 9 is a plan view showing a wall construction state in the example.

【図１０】実施例における地盤の掘下げ作業を示す説明
図である。FIG. 10 is an explanatory diagram showing ground digging work in the embodiment.

【図１１】実施例における補強板取付け作業を示す説明
図である。FIG. 11 is an explanatory diagram showing a reinforcing plate attaching operation in the embodiment.

【図１２】実施例における裏込め材注入作業を示す説明
図である。FIG. 12 is an explanatory view showing a backfill material injection operation in the embodiment.

【図１３】実施例による遮水壁の完成状態を示す平面図
である。FIG. 13 is a plan view showing a completed state of the impermeable wall according to the embodiment.

【図１４】実施例による遮水壁の完成状態を示す縦断面
図である。FIG. 14 is a longitudinal sectional view showing a completed state of the impermeable wall according to the embodiment.

【符号の説明】 １ 建込材 １ａ 角パイプ １ｂ プーリ ２ ワイヤロープ ３ ワイヤロープ ４ 削孔機 ５ ドリルパイプ ６ ビット ７ 巻取り装置 ７ａ 脚部 ８ 地中推進刃 ８ａ 刃先 ８ｂ 噴射口 ９ 注入ホース １０ ワイヤ １１ セメントミルク １２ 壁体 １３ 補強板 １４ 遮水壁 １４ａ 掘削面 １５ 底 １６ 立坑 １７ 地面 １８ 地盤 １９ 孔 ２０ バックホー ２１ 作業者 ２２ ポンプ ２３ ミキサ ２４ ホース[Description of Signs] 1 Building material 1a Square pipe 1b Pulley 2 Wire rope 3 Wire rope 4 Drilling machine 5 Drill pipe 6 Bit 7 Winding device 7a Leg 8 Underground propulsion blade 8a Blade tip 8b Injection port 9 Injection hose 10 Wire 11 Cement milk 12 Wall 13 Reinforcement plate 14 Impermeable wall 14a Excavated surface 15 Bottom 16 Vertical shaft 17 Ground 18 Ground 19 Hole 20 Backhoe 21 Worker 22 Pump 23 Mixer 24 Hose

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.⁶，ＤＢ名) E02D 3/12 101 E02D 5/20 102 E02F 5/02──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 3/12 101 E02D 5/20 102 E02F 5/02

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 地盤に所定深さの孔を削孔し、長い筒体
の下端部の二箇所にワイヤロープ案内用のガイドを設け
ると共に筒体長さより二倍以上長い二組のワイヤロープ
を各ガイドで折り返して筒体内と筒体外に沿うようにし
て移動自在にそれぞれ設けた構造とした建込材を、削孔
した孔に各ワイヤロープの端が全て地上に露出するよう
挿入して設置し、同様にして地盤に所定間隔で建込材を
設置した後、地盤を切り分ける刃先を下端に設けた地中
推進刃を隣り合う二つの建込材間の地面に配置し、二つ
の建込材のそれぞれ向き合う側にある各ワイヤロープの
筒体外から地上に露出させた端を地中推進刃に結着し、
結着したワイヤロープの筒体内から地上に露出させた端
をワイヤロープの巻取り装置に巻取り、この二つの建込
材が上昇しないようにそれぞれ押え手段で地面から押さ
えつけた状態で、巻取り装置を作動させてそれぞれのワ
イヤロープを巻取り、建込材の間で地中推進刃を引っ張
り下げてワイヤロープと共に地盤を切り分けて下方に推
進させながら、ワイヤロープと地中推進刃が通過してで
きた地盤の空間に硬化材を注入し、地中推進刃が筒体の
下端部のガイド位置まで達したら地中推進刃を逆に引き
上げて地盤から抜き、建込材間の空間に充填された硬化
材をそのまま硬化させ遮水性のある壁体を形成すると共
に、硬化材の硬化する前に隣接する各建込材間で向き合
う側でない残りのワイヤロープを用いて同様の作業を繰
返して壁体を連続させ、完全に硬化させて地盤に遮水壁
を構築することを特徴とする、連続遮水壁構築工法。1. A hole having a predetermined depth is drilled in the ground, a wire rope guide is provided at two places at a lower end portion of a long cylindrical body, and two sets of wire ropes that are at least twice as long as the length of the cylindrical body are provided. The building material was folded back with the guide and provided movably along the inside and outside of the cylinder, and inserted and installed so that all the ends of each wire rope were exposed to the ground in the drilled holes. In the same manner, after installing the building materials at predetermined intervals on the ground, an underground propulsion blade provided with a cutting edge for cutting the ground at the lower end is arranged on the ground between two adjacent building materials, and two building materials Attach the end of each wire rope exposed to the ground from the outside of the cylindrical body on the side facing each other to the underground propulsion blade,
Take up the end of the bound wire rope that is exposed to the ground from the inside of the cylinder and take up the wire rope take-up device, and take up the two building materials while holding them down from the ground with holding means so that they do not rise. Activate the device to wind up each wire rope, pull down the underground propulsion blade between the building materials, cut the ground together with the wire rope and propel it downward, while the wire rope and the underground propulsion blade pass. When the underground propulsion blade reaches the guide position at the lower end of the cylinder, the underground propulsion blade is pulled up and pulled out of the ground, filling the space between the building materials. The hardened material is hardened as it is to form a water-blocking wall, and facing each other between adjacent building materials before the hardened material is hardened.
A continuous water-impervious wall construction method characterized by repeating the same operation using the remaining wire ropes on the other side to make the wall continuous and completely hardening to construct a water-impervious wall on the ground. 【請求項２】 前記地中推進刃の下端の刃先に硬化材の
噴射口を所要数設け、この噴射口と硬化材の注入ホース
を接続し、建込材の間で地中推進刃を引っ張り下げたり
引き上げたりするのと同時に注入ホースを通じて硬化材
を送り込んで地中推進刃の刃先の噴射口から噴射させ、
地盤の空間へ硬化材を充填する、請求項１に記載の連続
遮水壁構築工法。2. A required number of hardening material injection ports are provided at the cutting edge at the lower end of the underground propulsion blade, and the injection ports and the hardening material injection hose are connected to pull the underground propulsion blade between the building materials. At the same time as lowering or raising, the hardening material is sent through the injection hose and ejected from the injection port of the blade of the underground propulsion blade ,
Filling the cured material to the land board space, continuous water-impervious wall building method according to claim 1. 【請求項３】 建込材のワイヤロープを巻取る巻取り装
置を、建込材の押え手段として建込材上端を押さえ付け
るように据付ける、請求項１又は２に記載の連続遮水壁
構築工法。3. The continuous impermeable wall according to claim 1, wherein a winding device for winding the wire rope of the building material is installed as a means for holding down the building material so as to press the upper end of the building material. Construction method. 【請求項４】 地盤に挿入した全ての隣り合う建込材の
間で注入した硬化材で壁体を構築して連続させた後、地
盤を掘下げて連続する壁体を露出させ、さらに露出した
壁体の一部を削って各建込材の表面を露出させ、各建込
材間にこれらの建込材を連結する補強板を取付け、補強
板と壁体の間の削られた隙間に硬化する裏込め材を充填
する、請求項１〜３いずれか記載の連続遮水壁構築工
法。4. After a wall is constructed and continuous with a hardened material injected between all adjacent building materials inserted into the ground, the ground is dug down to expose a continuous wall and further exposed. Exposing the surface of each building material by shaving a part of the wall body, installing a reinforcing plate connecting these building materials between each building material, and in the cut gap between the reinforcing plate and the wall body The method for constructing a continuous impermeable wall according to any one of claims 1 to 3, wherein the backfill material is cured. 【請求項５】 前記建込材を、長い角パイプの平行な一
組の側面の最下部にガイドとして二つのプーリを平行に
それぞれ回動自在に取付けて、二組のロープをプーリに
かけて折り返して設けた構造として用いる、請求項１〜
４いずれか記載の連続遮水壁構築工法。5. A pair of pulleys which are rotatably mounted in parallel with each other as a guide at the lowermost portion of a pair of parallel side surfaces of a long square pipe, and the two sets of ropes are folded over the pulleys. Claim 1 to use as a provided structure
4. The method for constructing a continuous impermeable wall according to any one of 4 above.