JPH0376921A - Method and apparatus for forming hardened layer of ground - Google Patents
Method and apparatus for forming hardened layer of groundInfo
- Publication number
- JPH0376921A JPH0376921A JP21128289A JP21128289A JPH0376921A JP H0376921 A JPH0376921 A JP H0376921A JP 21128289 A JP21128289 A JP 21128289A JP 21128289 A JP21128289 A JP 21128289A JP H0376921 A JPH0376921 A JP H0376921A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- hardening material
- tube
- base
- ground
- 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
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 62
- 239000007924 injection Substances 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims description 40
- 239000002689 soil Substances 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 239000004568 cement Substances 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- 239000008267 milk Substances 0.000 abstract description 2
- 210000004080 milk Anatomy 0.000 abstract description 2
- 235000013336 milk Nutrition 0.000 abstract description 2
- 239000004848 polyfunctional curative Substances 0.000 abstract 5
- 239000007788 liquid Substances 0.000 abstract 1
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は軟弱地盤の改良やトンネル、坑道などの横坑掘
削時に崩落や出水を防止するための覆工層の造成などに
利用される地盤硬化層の造成工法とその装置に関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to the improvement of soft ground and the creation of a lining layer to prevent collapse and water leakage during the excavation of horizontal shafts such as tunnels and shafts. This article relates to a method for creating a hardened layer and its equipment.
［従来の技術］
従来、この種の地盤硬化層の造成は先端部のみに硬化材
噴射ノズルと掘削刃を備えた注入ロッドを高速回転によ
り下降若しくは推進させて対象地盤に挿入し、所定深度
に達したところで硬化材を噴射しつつ抜去して硬化層を
造成するとともに、この硬化層を目的に従って並列造成
することにより行われてきたものである。また、注入ロ
フトに設けられる噴射ノズルは複数、多段等さまざまな
角度から設定されてきたが、位置的には先端付近に集中
されてきた。[Conventional technology] Conventionally, this type of hardened ground layer was created by lowering or propelling an injection rod with a hardening material injection nozzle and digging blade only at the tip and inserting it into the target ground at a predetermined depth. This method has been carried out by spraying and removing the hardening material to form a hardened layer, and then creating the hardened layers in parallel according to the purpose. In addition, the injection nozzles provided in the injection loft have been set from various angles, such as multiple or multi-tiered, but they have been concentrated near the tip.
［発明が解決しようとする問題点］
従来の方法では注入ロッドの先端部分からの硬化材噴射
のみに頼っているため、硬化層−本の噴射ストロークが
長く、充分な注入を行うためには硬化材を噴射しつつ回
転するロッドの後退速度も遅いため注入に極めて長時間
を要し非能率であるという問題があった。[Problems to be solved by the invention] Since the conventional method relies only on the injection of hardening material from the tip of the injection rod, the injection stroke of the hardened layer is long, and it is necessary to The rod, which rotates while injecting the material, has a slow retraction speed, resulting in a problem of inefficiency as injection takes an extremely long time.
［問題点を解決するための手段］
本発明は以上の問題点に対処するため、注入のための硬
化材噴射を分散し、複数点から同時に噴射作業を進行さ
せるために注入予定深度をほぼ等間隔に分割した単位長
さを設定し、先端部側壁に噴射ノズルを設けた単位長さ
の基部管と、これを貫いて単位長さまで伸張し、先端側
壁部に噴射ノズルを有する単位管を予定深度長さまで次
々と伸張させて成る地盤硬化材注入ロッドにより噴射注
入の移動を単位長さだけ行うことにより、−挙に予定深
度長さの地盤硬化材注入を行えるようにしたものである
。[Means for Solving the Problems] In order to solve the above problems, the present invention distributes the injection of hardening material for injection, and makes the planned injection depth approximately equal in order to proceed with the injection work from multiple points simultaneously. A unit length divided into intervals is set, and a unit length base tube with an injection nozzle on the side wall of the tip, and a unit tube that extends through this to a unit length and has an injection nozzle on the tip side wall are planned. By moving the injection injection by a unit length using the soil hardening material injection rod which is extended one after another to the depth length, the soil hardening material can be injected to a predetermined depth and length at once.
［作 用］
注入予定深度をほぼ等間隔に分割した単位長さを設定し
、これに対応して基部管を含む各単位管の先端部側壁に
噴射ノズルが設けられるので、硬化材注入を行いながら
後退する硬化材注入ロッドが単位長さだけ後退すると、
先の単位管の噴射ノズルが後部単位管の噴射ノズルが硬
化材注入を開始した位置まで移動し、先の単位管が造成
した硬化材注入層の後端部と後部単位管の造成した硬化
材注入層の先端がドツキングすることになり、全体とし
て一本の硬化材注入層が造成される。[Function] Unit lengths are set by dividing the planned injection depth into approximately equal intervals, and a corresponding injection nozzle is provided on the side wall of the tip of each unit tube including the base tube, so that hardening material can be injected. When the hardening material injection rod retreats by a unit length,
The injection nozzle of the previous unit pipe moves to the position where the injection nozzle of the rear unit pipe starts injecting the hardening material, and the rear end of the hardening material injection layer created by the previous unit pipe and the hardening material created by the rear unit pipe are removed. The tip of the injection layer is dotted, and one hardening material injection layer is formed as a whole.
［実 施 例］
以下垂直方向に地盤硬化層を造成する場合を例とし、図
面に従って本発明の詳細な説明する。[Example] The present invention will be described in detail below with reference to the drawings, taking as an example a case where a hardened ground layer is created in the vertical direction.
１は基台で、必要に応じてキャタピラなどの移動手段を
備えると共に、注入機構を支持する支持台２とこれを上
下させる上下動機構３を積載している。Reference numeral 1 denotes a base, which is provided with moving means such as caterpillars as necessary, and also carries a support base 2 that supports an injection mechanism and a vertical movement mechanism 3 that moves it up and down.
硬化材注入ロッド５は、注入予定深度をほぼ等間隔で分
割した単位長さＬを挿入長さとし、先端部側壁に噴射ノ
ズル５３を設けた基部管５１と、これを貫いてその先の
単位長さ２Ｌまで伸張し、先端側壁部に噴射ノズル５４
を有する単位管５２とから戒り、単位管の先端には掘削
刃５５が備えられ、後端はスイベル６を介して硬化材等
供給ホース６１．６２に接続する。The hardening material injection rod 5 has a unit length L obtained by dividing the planned injection depth at approximately equal intervals as an insertion length, and has a base pipe 51 with an injection nozzle 53 on the side wall of the tip end, and a unit length L extending through the base pipe 51. It extends to 2L, and there is an injection nozzle 54 on the side wall of the tip.
The unit pipe 52 has a cutting blade 55 at its tip, and its rear end is connected to a hardening material supply hose 61, 62 via a swivel 6.
なお、注入予定深度の状況等に応じ、単位管５２を複数
設定しても良いことは勿論である。It goes without saying that a plurality of unit tubes 52 may be set depending on the situation of the planned injection depth and the like.
以上のような装置を用い、まず対象地盤Ｗにロッド先端
を挿入し、次いで供給ホースから清水等の潤滑液を圧送
して噴射ノズル５３．５４から噴出しながらロッドを回
転して注入ロッド５を対象地盤Ｗの所定深度まで挿入す
る。Using the device described above, first insert the tip of the rod into the target ground W, then pressurize lubricant such as fresh water from the supply hose and rotate the rod while spraying it from the injection nozzles 53 and 54 to inject the injection rod 5. Insert into the target ground W to a predetermined depth.
所定の深度まで挿入されたところで、今度はセメントミ
ルク等の地盤硬化材を基部管５１、単位管５２にそれぞ
れ圧送供給して噴射ノズル５３．５４から高圧噴射（例
えば３００ ｋｇｆ ／ａａ） Ｌながら注入ロッド５
を単位長さしだけ回転後退させ、ロッドの周辺土壌に硬
化材を噴射混入することにより２Ｌ長さの地盤硬化層Ｍ
を造成するものである。なお、硬化材注入ロッド５を後
退させて基部前抜去直前位置付近Ａに至ったとき、基部
管５１に圧送する硬化材を水ガラス等の瞬結性パッキン
グ材に切り替えるようにすれば、挿入口付近に特別なバ
ッカー装備を必要とせず、スムーズに硬化材注入を行う
ことができる。When the material is inserted to a predetermined depth, a soil hardening material such as cement milk is pumped and supplied to the base pipe 51 and the unit pipe 52, respectively, and is injected at high pressure (for example, 300 kgf/aa) from the injection nozzles 53 and 54. rod 5
By rotating and retreating by a unit length and injecting hardening material into the soil around the rod, a 2L long soil hardening layer M is created.
It is to create. In addition, when the hardening material injection rod 5 is retreated and reaches the position A immediately before the front base is removed, if the hardening material to be pumped into the base tube 51 is switched to an instant-setting packing material such as water glass, the insertion port can be closed. Hardening material can be injected smoothly without requiring special backer equipment nearby.
［発明の効果］
本発明は以上のように構成したので、対象地盤に注入ロ
ッドを挿入した後、硬化材の噴射注入は注入のための硬
化材噴射を分散し、複数点から同時に噴射作業を進行さ
せることが可能となり、単位長さだけのロッド移動で一
挙に全体硬化材注入層が完成できる。従って、対象地盤
への硬化材注入時間を大幅に短縮することを可能にした
ものである。[Effects of the Invention] Since the present invention is configured as described above, after inserting the injection rod into the target ground, the injection of hardening material can be performed by dispersing the hardening material injection for injection and simultaneously performing the injection work from multiple points. The entire hardening material injection layer can be completed at once by moving the rod by a unit length. Therefore, it is possible to significantly shorten the time required to inject hardening material into the target ground.
図は本発明の実施例を示すもので、第１図は垂直方向に
地盤硬化層を造成する場合の硬化材注入開始時の状況を
示す施工説明図、第２図は硬化材注入層の造成状況を示
す説明図、第３図は造成した硬化材注入層を並列した状
況の一例を示す斜視図である。
１〜基台 ２〜注入機構支持台 ３〜支持台上下動機
構 ４〜移動手段 ５〜硬硬化材注入ランド５１〜基管
５２〜単位管 ５３．５４〜噴射ノズル５５〜掘削刃
６〜スイベル ６１．６２〜硬化材等供給ホースＡ−基
部管抜去直前位置付近 Ｍ〜硬化材注入層Ｗ〜対象地盤
要２・こThe figures show an embodiment of the present invention. Figure 1 is a construction explanatory diagram showing the situation at the start of hardening material injection when creating a soil hardening layer in the vertical direction, and Figure 2 is a construction illustration showing the situation at the start of hardening material injection when creating a hardening material layer in the vertical direction. An explanatory diagram showing the situation, FIG. 3 is a perspective view showing an example of a situation in which the formed hardening material injection layers are arranged in parallel. 1 - Base 2 - Injection mechanism support stand 3 - Support stand vertical movement mechanism 4 - Moving means 5 - Hard hardening material injection land 51 - Base pipe 52 - Unit pipe 53. 54 - Injection nozzle 55 - Excavation blade 6 - Swivel 61 .62 ~ Hardening material supply hose A - Near the position just before removing the base pipe M ~ Hardening material injection layer W ~ Target ground 2.
Claims (3)
、先端部側壁に噴射ノズルを設けた基部管と、これを貫
いてその先の単位長さまで伸張し、先端側壁部に噴射ノ
ズルを有する単位管とから成る地盤硬化材注入ロッドを
対象地盤に挿入し、各管の先端部ノズルから硬化材を噴
射しながらロッドを回動しつつ、ほぼ単位長さだけ後退
させることにより、予定深度長さの硬化材注入層を造成
することを特徴とする地盤硬化層造成工法(1) A base tube with a unit length obtained by dividing the planned injection depth at approximately equal intervals and an injection nozzle on the side wall of the distal end; A soil hardening material injection rod consisting of unit pipes with A ground hardening layer creation method characterized by creating a deep and long hardening material injection layer.
置付近に至ったとき、基部管に圧送する硬化材を瞬結性
パッキング材に切り替えるようにした特許請求の範囲（
１）記載の地盤硬化層造成工法(2) When the hardening material injection rod is retreated to the vicinity of the position immediately before removal of the base pipe, the hardening material to be pumped into the base pipe is switched to an instant-setting packing material (
1) Ground hardening layer creation method described
、先端部側壁に噴射ノズルを設けた基部管と、これを貫
いてその先の単位長さまで伸張し、先端側壁部に噴射ノ
ズルを有する単位管とから成り、各管が地盤硬化材等の
供給部に連絡する地盤硬化材注入ロッドを、その回動、
推進、後退を行う駆動機構を備えた基台上に支持して成
る地盤硬化層造成装置(3) A base tube with an injection nozzle on the side wall of the distal end, which is a unit length obtained by dividing the planned injection depth at approximately equal intervals, and a base tube that extends through the base tube to a unit length beyond that and has an injection nozzle on the side wall of the distal end. Each pipe has a soil hardening material injection rod connected to a supply section for soil hardening material,
A hardened soil layer creation device supported on a base equipped with a drive mechanism for propelling and retreating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21128289A JPH0376921A (en) | 1989-08-18 | 1989-08-18 | Method and apparatus for forming hardened layer of ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21128289A JPH0376921A (en) | 1989-08-18 | 1989-08-18 | Method and apparatus for forming hardened layer of ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0376921A true JPH0376921A (en) | 1991-04-02 |
Family
ID=16603351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21128289A Pending JPH0376921A (en) | 1989-08-18 | 1989-08-18 | Method and apparatus for forming hardened layer of ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0376921A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321809A (en) * | 1976-08-12 | 1978-02-28 | Wataru Nakanishi | Method of forming hardened layer underground |
| JPS61207712A (en) * | 1985-03-12 | 1986-09-16 | N I T:Kk | Method and device of improving ground |
| JPS61211418A (en) * | 1985-03-15 | 1986-09-19 | Shigeharu Arima | Chemical solution pouring method |
-
1989
- 1989-08-18 JP JP21128289A patent/JPH0376921A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321809A (en) * | 1976-08-12 | 1978-02-28 | Wataru Nakanishi | Method of forming hardened layer underground |
| JPS61207712A (en) * | 1985-03-12 | 1986-09-16 | N I T:Kk | Method and device of improving ground |
| JPS61211418A (en) * | 1985-03-15 | 1986-09-19 | Shigeharu Arima | Chemical solution pouring method |
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