JPH0776822A - Method and apparatus for grouting - Google Patents
Method and apparatus for groutingInfo
- Publication number
- JPH0776822A JPH0776822A JP24637893A JP24637893A JPH0776822A JP H0776822 A JPH0776822 A JP H0776822A JP 24637893 A JP24637893 A JP 24637893A JP 24637893 A JP24637893 A JP 24637893A JP H0776822 A JPH0776822 A JP H0776822A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- ground
- improvement material
- injection
- ground improvement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、地盤の中に地盤改良材
を注入する工法、及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for injecting a ground improvement material into the ground.
【0002】[0002]
【従来の技術】従来、地盤に掘削孔を開け、パイプを挿
入して、パイプの口元から地盤改良材を掘削孔に注入す
る方法が行われていた。2. Description of the Related Art Conventionally, there has been performed a method of forming a drill hole in the ground, inserting a pipe, and injecting a ground improvement material into the drill hole from the mouth of the pipe.
【0003】[0003]
【発明が解決しようとする問題点】しかし、従来の方法
では、次のような問題点がある。 <イ>パイプの口元から地盤改良材を地盤中に注入する
方法では、改良材の入りやすい箇所だけ入り、パイプ全
長にわたって注入することが難しかった。 <ロ>地盤改良材として、早く固まる地盤改良材や強度
のある発泡性の材料(例えば、硬質発泡ウレタンなど)
などでは、長いパイプや太いパイプでは、先端まで地盤
改良材が行き着くまでに時間がかかるために、パイプの
途中や手前の部分で硬化してしまい、パイプ全長にわた
って注入することが難しかった。 <ハ>パイプの先端の一ヶ所から地山へ注入していたた
め、その部分の地山にしか地盤改良材が浸透できなかっ
た。パイプ全長に亘って地盤に注入することが難しかっ
た。However, the conventional method has the following problems. <A> In the method of injecting the ground improvement material into the ground from the mouth of the pipe, it was difficult to inject the improvement material only in a portion where the improvement material easily enters and to fill the entire length of the pipe. <B> As a soil improvement material, a soil improvement material that hardens quickly and a foamable material with high strength (for example, hard urethane foam)
In the case of a long pipe or a thick pipe, it took time for the ground improvement material to reach the tip, so that it hardened in the middle of the pipe or in the front part, and it was difficult to inject it over the entire length of the pipe. <C> Since the pipe was being injected into the ground from one point, the ground improvement material could only permeate into that area. It was difficult to inject it into the ground over the entire length of the pipe.
【0004】[0004]
【本発明の目的】本発明は、地盤中の孔に地盤改良材を
効率良く注入できる工法及び装置を提供することにあ
る。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and an apparatus capable of efficiently injecting a ground improvement material into a hole in the ground.
【0005】[0005]
【問題点を解決するための手段】本発明は、地盤中に地
盤改良材を注入する地盤注入工法において、長手方向に
複数の注入孔が開けられたパイプを地盤中に設置し、該
パイプ内に複数のパッカーと地盤改良材を注入する多重
管とを配置し、該パイプ内で該注入孔の間に配置された
複数のパッカーにより該パイプの内空を複数の空間に遮
断し、遮断された空間毎に該多重管の1つの管を対応づ
け、地盤改良材を注入し、該多重管、該遮断された空間
及び該注入孔を介して地盤改良材を地盤中に注入するこ
とを特徴とする地盤注入工法、または、地盤中に地盤改
良材を注入する地盤注入装置において、長手方向に複数
の注入孔が設けられているパイプと、該パイプ内で該注
入孔の間に配置され、該パイプの内空を複数の空間に遮
断する複数のパッカーと、該遮断された空間毎に1つの
管が対応付けられ、地盤改良材を注入する多重管と、該
多重管、該遮断された空間及び該注入孔を介して地盤改
良材を地盤中に注入することができることを特徴とする
地盤注入装置にある。DISCLOSURE OF THE INVENTION The present invention relates to a ground pouring method for pouring a ground improving material into the ground, in which a pipe having a plurality of injection holes in the longitudinal direction is installed in the ground and A plurality of packers and multiple pipes for injecting ground improvement material are arranged in the pipe, and the insides of the pipes are cut off by a plurality of packers arranged between the injection holes in the pipes to be cut off. One of the multiple pipes is associated with each of the spaces, a ground improvement material is injected, and the ground improvement material is injected into the ground through the multiple pipe, the blocked space and the injection hole. A ground injection method or a ground injection device for injecting a ground improvement material into the ground, a pipe provided with a plurality of injection holes in the longitudinal direction, and arranged between the injection holes in the pipe, A plurality of pads for blocking the inner space of the pipe into a plurality of spaces -, And one pipe is associated with each of the blocked spaces, and a multiple pipe for injecting the ground improvement material, and the ground improvement material in the ground through the multiple pipe, the blocked space, and the injection hole It is in the ground injection device characterized by being able to inject into.
【0006】[0006]
【実施例1】以下、図面を用いて本発明の実施例を説明
する。Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.
【0007】<イ>実施例の概要(図1〜図2) 地盤注入装置1は、掘削孔6に地盤改良材を均質に注入
するものである。そのために、長手方向に複数の注入口
21が設けられた補強パイプ2を掘削孔6内に設置す
る。補強パイプ2の内部に多重管3に取り付けられた複
数のパッカー4を挿入し、ジャッキ5で多重管3の内管
31と外管34をスライドさせると、パッカー4が外方
に突出し、補強パイプ2の内空を幾つかの空間に遮断す
る。遮断された空間には注入口21を有する。それぞれ
の遮断された空間に地盤改良材を別々に注入し、各注入
口21から地盤改良材を掘削孔6全体に排出し、掘削孔
6全体に均質な地盤改良材を充填する。<A> Outline of Embodiment (FIGS. 1 and 2) The ground injection device 1 is for uniformly injecting the ground improvement material into the excavation hole 6. Therefore, the reinforcing pipe 2 having the plurality of injection ports 21 provided in the longitudinal direction is installed in the excavation hole 6. When a plurality of packers 4 attached to the multiple pipe 3 are inserted into the reinforcing pipe 2 and the inner pipe 31 and the outer pipe 34 of the multiple pipe 3 are slid by the jack 5, the packer 4 projects outward and the reinforcing pipe Cut off the inner space of 2 into some spaces. The blocked space has an injection port 21. The ground improvement material is separately injected into each of the closed spaces, the ground improvement material is discharged from each of the inlets 21 to the entire excavation hole 6, and the entire excavation hole 6 is filled with the homogeneous ground improvement material.
【0008】<ロ>補強パイプ(図1〜図2) 補強パイプ2は、パッカー4が挿入できる中空の形状で
あり、長手方向に中空と連通する複数の注入口21を有
している。掘削孔6の口元の補強パイプ2の周辺にはコ
ーキング材61が配置され、掘削孔6内部に注入された
地盤改良材が漏洩するのを防止している。<B> Reinforcing Pipe (FIGS. 1 and 2) The reinforcing pipe 2 has a hollow shape into which the packer 4 can be inserted, and has a plurality of injection ports 21 communicating with the hollow in the longitudinal direction. A caulking material 61 is arranged around the reinforcing pipe 2 at the mouth of the excavation hole 6 to prevent the ground improvement material injected into the excavation hole 6 from leaking.
【0009】<ハ>多重管(図1〜図3) 多重管3は、同心円状に多数の管が配置され、各管の間
にパッカー4が取り付けられている。外管34を除いた
各管には投入口36を有し、投入口36から地盤改良材
を投入する。内管31の投入口36から注入された改良
材は、内管31を通り、先端の開口35から排出され
る。小中間管32の投入口36から注入された改良材
は、小中間管32と内管31で囲まれた空間を通り、小
中間管32の開口35から排出される。同様に、大中間
管33も投入口36から入り開口35から排出される。
内管31と外管34にジャッキ5が取り付けられ、ジャ
ッキ5の伸縮により、各管がスライドするように構成さ
れている。<C> Multi-tube (FIGS. 1 to 3) The multi-tube 3 has a large number of concentric tubes, and a packer 4 is mounted between the tubes. Each pipe except the outer pipe 34 has a charging port 36, and the ground improvement material is charged from the charging port 36. The improving material injected from the charging port 36 of the inner pipe 31 passes through the inner pipe 31 and is discharged from the opening 35 at the tip. The improving material injected from the charging port 36 of the small intermediate pipe 32 passes through the space surrounded by the small intermediate pipe 32 and the inner pipe 31, and is discharged from the opening 35 of the small intermediate pipe 32. Similarly, the large intermediate pipe 33 is also discharged from the inlet 35 through the inlet 35.
The jacks 5 are attached to the inner pipe 31 and the outer pipe 34, and each pipe slides as the jack 5 expands and contracts.
【0010】<ニ>パッカー(図1〜図3) パッカー4は可撓性の材料で作られ、両端を保持部41
で固定され、保持部41は多重管3の各管に取り付けら
れている。ジャッキ5を延ばし、内管31を手前に引
き、外管34を押出すように動作させると、パッカー4
は外方に突出する。外方に突出すると、パッカー4が補
強パイプ2の空間を遮断し、複数の遮断された空間を形
成する。<D> Packer (FIGS. 1 to 3) The packer 4 is made of a flexible material and has both ends holding portions 41.
The holder 41 is attached to each tube of the multiplex tube 3. When the jack 5 is extended, the inner pipe 31 is pulled forward, and the outer pipe 34 is pushed out, the packer 4
Project outwards. When projecting outward, the packer 4 blocks the space of the reinforcing pipe 2 to form a plurality of blocked spaces.
【0011】以下に、地盤改良材を注入する工程を説明
する。The process of injecting the ground improvement material will be described below.
【0012】<イ>パッカーの突出 掘削孔6に補強パイプ2を挿入し、掘削孔6の口元にコ
ーキング材61を配置する。補強パイプ2内部にパッカ
ー4が取り付けられた多重管3を挿入し、パッカー4が
注入口21の間にくるように配置する。ジャッキ5を伸
ばすことにより各パッカー4を外方に押出し、補強パイ
プ2の内空を複数の空間に遮断する。各遮断された空間
には注入口21が対応して存在する。<B> Projection of Packer The reinforcing pipe 2 is inserted into the excavation hole 6, and the caulking material 61 is arranged at the mouth of the excavation hole 6. The multiple pipe 3 with the packer 4 attached is inserted into the reinforcing pipe 2 and arranged so that the packer 4 is located between the inlets 21. By extending the jack 5, each packer 4 is pushed outward, and the inner space of the reinforcing pipe 2 is blocked into a plurality of spaces. There is a corresponding inlet 21 in each closed space.
【0013】<ロ>掘削孔への地盤改良材の注入 多重管3の各投入口36から同時に地盤改良材をパッカ
ー4で遮断された各空間に注入する。各空間では地盤改
良材が充満し、そこから注入口21を通して掘削孔6に
排出される。この時、各空間には別々の多重管3の1つ
の管の開口35が配置されているので、各管に流す地盤
改良材を調整すると、掘削孔6の奥でも手前でも均等に
地盤改良材を注入することができる。<B> Injecting the soil improvement material into the excavation holes At the same time, the soil improvement material is injected into each of the spaces blocked by the packer 4 from the respective inlets 36 of the multiple pipe 3. The ground improvement material is filled in each space, and the ground improvement material is discharged from there through the inlet 21 to the excavation hole 6. At this time, since the openings 35 of one pipe of the multiple pipes 3 which are separate from each other are arranged in each space, adjusting the ground improvement material to be flown to each pipe makes it possible to evenly improve the ground improvement material both inside and outside the excavation hole 6. Can be injected.
【0014】[0014]
【発明の効果】本発明は、次のような効果を得ることが
できる。 <イ>早く固まる地盤改良材や強度のある発泡性の材
料、例えば硬質発泡ウレタンなど、を長いパイプや太い
パイプを使用して地山に全長にわたって均質な注入をす
ることができるので、信頼性の高い地盤改良を行うこと
ができる。 <ロ>長いパイプの注入も、一度に注入できるので、短
時間に注入することができる。 <ハ>補強パイプによる地盤の補強と地盤改良材による
補強が同時に得られる。According to the present invention, the following effects can be obtained. <B> Since a ground improvement material that hardens quickly and a foamable material with strong strength, such as hard urethane foam, can be injected uniformly into the ground using a long pipe or a thick pipe, reliability is improved. High ground improvement can be performed. <B> Since long pipes can be injected at the same time, they can be injected in a short time. <C> Reinforcement of the ground by the reinforcement pipe and reinforcement by the ground improvement material can be obtained at the same time.
【図1】補強パイプとパッカーの配置図[Fig.1] Layout of reinforcing pipe and packer
【図2】補強パイプとパッカーの外観図[Fig. 2] External view of the reinforcing pipe and packer
【図3】パッカーの拡大図[Figure 3] Enlarged view of the packer
【図4】多重管の投入口の図1のA−Aの断面図FIG. 4 is a cross-sectional view taken along the line AA in FIG. 1 of the multi-tube input port.
Claims (2)
法において、 長手方向に複数の注入孔が開けられたパイプを地盤中に
設置し、 該パイプ内に複数のパッカーと地盤改良材を注入する多
重管とを配置し、 該パイプ内で該注入孔の間に配置された複数のパッカー
により該パイプの内空を複数の空間に遮断し、 遮断された空間毎に該多重管の1つの管を対応づけ、地
盤改良材を注入し、 該多重管、該遮断された空間及び該注入孔を介して地盤
改良材を地盤中に注入することを特徴とする、 地盤注入工法。1. A ground injection method for injecting a ground improvement material into the ground, wherein a pipe having a plurality of injection holes in a longitudinal direction is installed in the ground, and a plurality of packers and the ground improvement material are installed in the pipe. A multiple pipe for injection is arranged, and the inner space of the pipe is cut off into a plurality of spaces by a plurality of packers arranged between the injection holes in the pipe. A ground pouring method, wherein two pipes are associated with each other, a ground improvement material is injected, and the ground improvement material is injected into the ground through the multiple pipes, the blocked space, and the injection hole.
置において、 長手方向に複数の注入孔が設けられているパイプと、 該パイプ内で該注入孔の間に配置され、該パイプの内空
を複数の空間に遮断する複数のパッカーと、 該遮断された空間毎に1つの管が対応付けられ、地盤改
良材を注入する多重管と、 該多重管、該遮断された空間及び該注入孔を介して地盤
改良材を地盤中に注入することができることを特徴とす
る、 地盤注入装置。2. A ground injection apparatus for injecting a soil improvement material into the ground, comprising: a pipe having a plurality of injection holes in a longitudinal direction; and a pipe disposed in the pipe between the injection holes. A plurality of packers for blocking the inner space into a plurality of spaces, one pipe for each of the blocked spaces, and a multiple pipe for injecting a ground improvement material, the multiple pipes, the blocked spaces and the A ground injection device, which is capable of injecting a ground improvement material into the ground through an injection hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24637893A JPH0776822A (en) | 1993-09-07 | 1993-09-07 | Method and apparatus for grouting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24637893A JPH0776822A (en) | 1993-09-07 | 1993-09-07 | Method and apparatus for grouting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0776822A true JPH0776822A (en) | 1995-03-20 |
Family
ID=17147656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24637893A Pending JPH0776822A (en) | 1993-09-07 | 1993-09-07 | Method and apparatus for grouting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0776822A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005248632A (en) * | 2004-03-05 | 2005-09-15 | Kanpai Co Ltd | Liquid injection method, recharge method and chemical grouting method |
KR100806938B1 (en) * | 2001-07-13 | 2008-02-25 | 조희남 | A grouting apparatus and method for groundwater wells which can be injected by injecting grouting liquid downwardly. |
CN108843270A (en) * | 2018-07-20 | 2018-11-20 | 河南理工大学 | A kind of triple channel Grouting Pipe and its overlap joint application method |
-
1993
- 1993-09-07 JP JP24637893A patent/JPH0776822A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100806938B1 (en) * | 2001-07-13 | 2008-02-25 | 조희남 | A grouting apparatus and method for groundwater wells which can be injected by injecting grouting liquid downwardly. |
JP2005248632A (en) * | 2004-03-05 | 2005-09-15 | Kanpai Co Ltd | Liquid injection method, recharge method and chemical grouting method |
CN108843270A (en) * | 2018-07-20 | 2018-11-20 | 河南理工大学 | A kind of triple channel Grouting Pipe and its overlap joint application method |
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