JPS586803B2 - grouting equipment - Google Patents
grouting equipmentInfo
- Publication number
- JPS586803B2 JPS586803B2 JP15479180A JP15479180A JPS586803B2 JP S586803 B2 JPS586803 B2 JP S586803B2 JP 15479180 A JP15479180 A JP 15479180A JP 15479180 A JP15479180 A JP 15479180A JP S586803 B2 JPS586803 B2 JP S586803B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- grout
- pressure
- flow rate
- pipe
- 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.)
- Expired
Links
- 238000002347 injection Methods 0.000 claims description 91
- 239000007924 injection Substances 0.000 claims description 91
- 239000011440 grout Substances 0.000 claims description 56
- 238000005553 drilling Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
この発明は、グラウトを地中に注入する装置に関し、特
に、穿孔機械に装備した装置において、注入管路及び戻
り管路に設けた検知器より得た検知信号と、予め設定し
た設定信号と、粘度計とよＪり得る臨界流量とを比較演
算して、流量制御弁と注入ポンプのサーボ機構とを作動
し、グラウトの注入圧力と注入量とを制御し、管路中の
グラウトの沈降固化を防止する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for injecting grout into the ground, and in particular, in a device installed in a drilling machine, a detection signal obtained from a detector provided in an injection pipe and a return pipe, The preset setting signal and the critical flow rate determined by the viscometer are compared and calculated to operate the flow rate control valve and the servo mechanism of the injection pump to control the injection pressure and amount of grout. Prevents grout from settling and solidifying in the road.
一般に、グラウト注入は、地下鉄、下水道等の；都市土
木工事において、地盤のくずれや湧水をとめて施工する
必要がある場合や、その他地盤改良のために行なわれる
。In general, grouting is carried out in urban civil engineering works such as subways and sewers, when it is necessary to stop ground collapse or spring water, or for other ground improvement purposes.
従来のグラウト注入方法は、単管の注入ロツドを用い、
一定時間後に固結するグラウトを地盤に加圧注入するロ
ツド注入工法が行なわれていた。Traditional grouting methods use a single-pipe grouting rod;
The rod injection method was used to inject grout under pressure into the ground, which hardens after a certain period of time.
これは施工が簡単であるが、注入ロツドの周囲の隙間、
粗い層、境界面から漏れ易いので、地盤改良が十分でな
いという難点があった。This is easy to install, but the gap around the injection rod,
The problem was that ground improvement was not sufficient because it was easy to leak through rough layers and interfaces.
而してその注入方法は、単に注入圧力と注入量とを手動
制御する方法で行なわれておシ、ミキサで十分濃度調整
されたグラウトが、穿孔機の注入装置の配管及び注入ロ
ツドを介して土中に圧入される。The injection method is simply to manually control the injection pressure and injection amount, and the grout, whose concentration has been adjusted sufficiently by the mixer, is poured through the piping and injection rod of the injection device of the drilling machine. Pressed into the soil.
グラウトの注入時間は、グラウトの地盤浸透が十分に行
なわれる必要があるため、比較的長時間になり、従って
所定の注入圧に達するに従い、グラウトの流速が低下し
、グラウトが沈降し、濃度が変化するほか、配管等にグ
ラウトが沈降付着して管路の一部が閉塞し、地盤中への
グラウトの注入圧力及びその流量が正確に制御できない
。The grout injection time is relatively long because it is necessary for the grout to penetrate the ground sufficiently. Therefore, as the predetermined injection pressure is reached, the grout flow rate decreases, the grout settles, and the concentration decreases. In addition to this, grout settles and adheres to pipes, etc., causing part of the pipes to become blocked, making it impossible to accurately control the injection pressure and flow rate of grout into the ground.
従って異常圧力、異常流量によるグラウト注入を施工す
ることにより地盤改良は不可能となり、且つ地盤の変位
を来たし、構造物又は地中敷設物等に障害を生ずる。Therefore, by performing grout injection under abnormal pressure and abnormal flow rate, ground improvement becomes impossible, and the ground is displaced, causing damage to structures or underground installations.
一方、穿孔機の注入装置の配管の閉塞によるその清掃等
により作業能率の低下を来たす。On the other hand, work efficiency is lowered due to cleaning of the piping of the injection device of the drilling machine due to blockage.
この発明は、特に、グラウト注入のかかる諸問題を解決
するものである。The present invention specifically solves such grouting problems.
而してこの発明の目的は、グラウトの注入圧力と注入量
とを自動的に制御するにあり、またこの発明の目的は、
管路中のグラウトの沈降を未然に防止する装置を提供す
るにあり、更にこの発明の目的は、グラウト注入作業の
総合的な能率を向上することができる装置を提供するに
ある。An object of the present invention is to automatically control the injection pressure and amount of grout;
It is an object of the present invention to provide a device that prevents grout from settling in a pipe, and a further object of the present invention is to provide a device that can improve the overall efficiency of grout injection work.
即ちこの発明は、図示する実施例の如く、穿孔機械に装
備したグラウト注入装置において、注入管７Ａと戻り管
７Ｂとより成る二重管式注入ロツド７を有し、注入管路
１４及び戻り管路１５中に、圧力検知器１７．２０と流
量検知器１８．１９とを設け、夫々の検知信号と、圧力
設定器２２、流量設定器２５にて予め設定した設定信号
と、粘度計２６とより得られる臨界流量の設定信号とを
、比較演算制御器２３．２８によって比較演算して得ら
れる出力信号により、流量制御弁２１と注入ポンプ１３
のサーボ機構２４とを作動し、グラウトの注入圧力と注
入量とを制御するように構成したことを特徴とするグラ
ウト注入装置に係る。That is, in the present invention, as in the illustrated embodiment, a grout injection device installed in a drilling machine has a double pipe type injection rod 7 consisting of a injection pipe 7A and a return pipe 7B, and a injection pipe 14 and a return pipe 7B. A pressure detector 17.20 and a flow rate detector 18.19 are provided in the passage 15, and each detection signal, a setting signal preset by the pressure setting device 22 and the flow rate setting device 25, and a viscometer 26 are provided. The flow rate control valve 21 and the injection pump 13 are controlled by the output signal obtained by comparing and calculating the critical flow rate setting signal obtained by the comparison calculation controller 23.28.
The present invention relates to a grout injection device characterized in that the grout injection device is configured to operate the servo mechanism 24 to control the injection pressure and injection amount of grout.
この発明の実施例を図面を参照して説明する。Embodiments of the invention will be described with reference to the drawings.
第１図は穿孔機械の側面図を示し、走行台車１上の架台
２に起伏可能に枢着されたガイドシエル３があり、ガイ
ドシエル３上を穿孔機４が乗って滑動可能になっている
。FIG. 1 shows a side view of the drilling machine, in which there is a guide shell 3 pivotally attached to a frame 2 on a traveling carriage 1 so as to be able to rise and fall, and a drilling machine 4 riding on the guide shell 3 so that it can slide. .
穿孔機４にはシャンクロツド５にスイベルジョイント６
を介してグラウト注入ロッド７を装着してあり、これに
よって地中にグラウトを注入する。The drilling machine 4 has a shank rod 5 and a swivel joint 6.
A grouting rod 7 is attached through the grouting rod 7 to inject grout into the ground.
このため走行台車１上には、グラウト注入装置８と油圧
駆動装置９とが装備されている。For this purpose, a grout injection device 8 and a hydraulic drive device 9 are installed on the traveling carriage 1.
第２図は、この発明になるグラウト注入装置の，系統概
略を示す。FIG. 2 shows a system outline of the grout injection device according to the present invention.
注入管７Ａと戻り管７Ｂの二重管より成るグラウト注入
ロッド７は、スイベルジョイント６を介して穿孔機４に
装着される。A grout injection rod 7 consisting of a double pipe including an injection pipe 7A and a return pipe 7B is attached to the drilling machine 4 via a swivel joint 6.
グラウトはタンク１０中に貯えられ、ミキサ１１を備え
て濃度を調整される。Grout is stored in a tank 10, and a mixer 11 is provided to adjust the concentration.
注入ポンブ１３は注入用原動機１２に連結して駆動され
、タンク１０からグラウトを吸上げて、注入側管路１４
を経て前記注入管７Ａに供給する。The injection pump 13 is connected to the injection prime mover 12 and driven, sucks up grout from the tank 10, and supplies it to the injection side pipe line 14.
The liquid is supplied to the injection pipe 7A through.
グラウトの戻りは、戻り管７Ｂから戻り側管路１５を経
てタンク１０に接続される。The return of the grout is connected to the tank 10 via the return pipe 15 from the return pipe 7B.
注入側管路１４には、粘度計２６と、戻り側管路１５へ
切換えのための切換弁１６と、グラウトの注入圧力及び
注入流量を検知する圧力計１７と流量計１８とを設けて
ある。The injection side pipe line 14 is provided with a viscometer 26, a switching valve 16 for switching to the return side pipe line 15, a pressure gauge 17 and a flow meter 18 for detecting the injection pressure and injection flow rate of grout. .
また、戻り側管路１５には、グラウトの戻りの流量、圧
力を検知する流量計１９と圧力計２０と、また、流量を
制御する流量制御弁２１とが設置される。Further, in the return side pipe line 15, a flow meter 19 and a pressure gauge 20 for detecting the return flow rate and pressure of the grout, and a flow rate control valve 21 for controlling the flow rate are installed.
注入ロッド７を二重管としたことは、くずれのない地盤
を形成する機能をもたせる利点もある。Making the injection rod 7 a double pipe also has the advantage of providing the function of forming a foundation that does not collapse.
゛次に第３図のブロック図に従ってグラウト注入の制御
系統について説明する。゛Next, the control system for grout injection will be explained according to the block diagram of Fig. 3.
グラウト注入の圧力を設定する圧力設定器２２と、該注
入側の圧力を検知するための圧力計１７と、戻り側の圧
力を検知するための圧力計２０とは、比較演算制御器２
３に接続し、この比較演算制御器２３は、グラウトの注
入ポンプ１３を制御するサーボ機構２４に接続している
。A pressure setting device 22 for setting the pressure of grout injection, a pressure gauge 17 for detecting the pressure on the injection side, and a pressure gauge 20 for detecting the pressure on the return side are the comparison calculation controller 2.
3, and this comparison calculation controller 23 is connected to a servomechanism 24 that controls the grout injection pump 13.
また、単位時間当りのグラウト注入量を設定する流量設
定器２５と、注入側及び戻り側の流量を検知する流量計
１８．１９と、注入側に設けられたグラウト沈降防止の
だめの粘度計２６が接続されてグラウトの臨界流量を設
定する流量設定器２７とを、比較演算制御器２８に接続
する。Further, a flow rate setting device 25 for setting the amount of grout injected per unit time, a flow meter 18, 19 for detecting the flow rate on the injection side and return side, and a viscometer 26 for preventing grout settling provided on the injection side are provided. A flow rate setting device 27 that is connected to set the critical flow rate of grout is connected to a comparison calculation controller 28.
この比較演算制御器２８は、戻り側に設けた流量制御弁
２１を制御するサーボ機構３０と、グラウト注入量を積
算する積算器２９とに夫々接続している。This comparison calculation controller 28 is connected to a servo mechanism 30 that controls the flow rate control valve 21 provided on the return side, and an integrator 29 that integrates the amount of grout injection.
グラウト注入の設定圧力は、圧力設定器２２よりの設定
信号と、注入側の圧力計１７及び戻り側の圧力計２０よ
９の検知信号とを比較演算制御器２３にて比較し、その
出力信号により注入ポンプ１３の流量制御を司るサーボ
機構２４を駆動する。The set pressure for grout injection is determined by comparing the setting signal from the pressure setting device 22 with the detection signals of the pressure gauge 17 on the injection side and the pressure gauges 20 to 9 on the return side using the comparison calculation controller 23, and then outputs the signal. This drives the servo mechanism 24 that controls the flow rate of the injection pump 13.
即ち Ｐｏ ≧Ｐ１〉Ｐ２ の関係を保つよう制御する。That is, Po ≧P1>P2 control to maintain the relationship.
ここに Ｐｏ＝注入の設定圧力 Ｐ１＝注入側圧力 Ｐ２＝戻り側圧力 とする。Here Po=set pressure for injection P1 = injection side pressure P2 = return side pressure shall be.
もし、 Ｐ１ ＝Ｐ２ ＝ＰＯ であれば、閉塞のおそれがある。if, P1 = P2 = PO If so, there is a risk of blockage.
更に単位時間当りのグラウト注入の設定流量Ｑ。Furthermore, the set flow rate Q for grout injection per unit time.
を流量設定器２５よりの設定信号と、注入側及び戻り側
の流量Ｑ１， Ｑ２を検知する流量計１８，１９よりの
検知信号と、グラウト沈降防止のだめの粘度計２６を設
けてその出力信号からグラウトの臨界流量を設定する流
量設定器２７よりの出力信号Ｑｍｉｎとを、比較演算制
御器２８にて比較演算を行ない、その出力信号により流
量制御弁２１のサーボ機構３０を駆動して制御を行なう
。from the setting signal from the flow rate setting device 25, the detection signal from the flowmeters 18 and 19 that detect the flow rates Q1 and Q2 on the injection side and return side, and the output signal of a viscometer 26 for preventing grout settling. The comparison calculation controller 28 performs a comparison calculation with the output signal Qmin from the flow rate setting device 27 that sets the critical flow rate of the grout, and the servo mechanism 30 of the flow control valve 21 is driven and controlled by the output signal. .
一方、注入量（Ｑ１−Ｑ２）は積算器２９に記録されて
作業管理される。On the other hand, the injection amount (Q1-Q2) is recorded in the integrator 29 for operational management.
また、グラウトの注入圧力は、土質の空隙率、グラウト
の粘度と強度、注入量、注入地盤の特性等に影響される
が、一般に注入圧は、流量、グラウトの粘性に比例し、
土質の浸透圧に反比例する。In addition, the injection pressure of grout is influenced by the porosity of the soil, the viscosity and strength of the grout, the injection amount, the characteristics of the injection ground, etc., but in general, the injection pressure is proportional to the flow rate and the viscosity of the grout.
It is inversely proportional to the osmotic pressure of the soil.
即ち
ここに
Ｐ１ 一注入圧力
Ｐｇ ＝注入以前の注入孔の圧力
（Ｑ１−Ｑ２）一注大量
Ｃ ＝注入係数（注入孔の形状、水源等による）
Ｋｏ＝水に対する土質の浸透性
Ｎ ＝グラウトの粘性
Ｎｏ＝水の粘性
上記の関係からグラウト注入作業は、経験的に行なわれ
、グラウトの注入時間は、十分な注入圧力で注入すれば
よいとの単純な作業でなく、注入圧力の効果により、地
盤のクラツクの開口が増大し、注入圧力の急激な降下が
生じたり、グラウトの沈殿による楔効果により地盤のク
ラツクの復元を妨げる等のため、注入圧力Ｐ１に非常に
近い圧力で反復注入を行ない、グラウトを注入する必要
がある。That is, here, P1 - injection pressure Pg = injection hole pressure before injection (Q1 - Q2) one injection volume C = injection coefficient (depending on injection hole shape, water source, etc.) Ko = permeability of soil to water N = of grout Viscosity No. = Viscosity of water Based on the above relationship, grout injection work is done empirically, and the grout injection time is not a simple operation of injecting with sufficient injection pressure, but due to the effect of injection pressure. The opening of the crack in the ground increases, causing a sudden drop in the injection pressure, and the wedge effect caused by grout precipitation prevents the restoration of the crack in the ground, so repeated injections are carried out at a pressure very close to the injection pressure P1. , it is necessary to inject grout.
即ち圧力設定器２２にてグラウトの注入圧力Ｐ０を設定
し、その設定信号と注入側圧力計１７及び戻り側圧力計
２０よりの夫々の圧力の検知信号Ｐ１，Ｐ２を比較演算
制御器２３にて比較演算し、Ｐｏ≧Ｐ，〉Ｐ２
の出力信号により注入ポンプ１３のサーボ機構２４を駆
動し、流量制御を行なう。That is, the grout injection pressure P0 is set with the pressure setting device 22, and the set signal is compared with the pressure detection signals P1 and P2 from the injection side pressure gauge 17 and the return side pressure gauge 20, respectively, using the calculation controller 23. A comparison calculation is performed, and the servo mechanism 24 of the injection pump 13 is driven by the output signal of Po≧P,>P2 to control the flow rate.
比較演算制御器２３には、注入圧力に近接した或る圧力
に達すると急激な注入圧の圧力上昇を防止する微分器（
図示せず）を設けてあり、所定の注入時間におけるグラ
ウト注入が完了すると、穿孔機４が後退し、次の注入作
業に移る。The comparison calculation controller 23 includes a differentiator (
(not shown), and when the grout injection for a predetermined injection time is completed, the drilling machine 4 moves backward and moves on to the next injection operation.
以上の説明から明らかなように、この発明によれば、穿
孔機を利用したグラウト注入装置において、グラウトの
注入圧力と注入量とを自動的に制御して、管路中の沈降
固化を防止することができる。As is clear from the above description, according to the present invention, in a grout injection device using a boring machine, the injection pressure and injection amount of grout are automatically controlled to prevent sedimentation and solidification in the pipe line. be able to.
第１図は穿孔機械の側面図、第２図はグラウト注入装置
の系統概略を示す図、第３図はグラウト注入制御のブロ
ック図である。
図中、７は注入ロッド、７Ａは注入管、７Ｂは戻り管、
１４は注入側管路、１５は戻り側管路、１７．２０は圧
力計、１８．１９は流量計、２２は圧力設定器、２５は
流量設定器、２６は粘度計、２３，２Ｂは比較演算制御
器である。FIG. 1 is a side view of the drilling machine, FIG. 2 is a diagram showing a schematic system of the grout injection device, and FIG. 3 is a block diagram of grout injection control. In the figure, 7 is an injection rod, 7A is an injection pipe, 7B is a return pipe,
14 is an injection side pipe, 15 is a return side pipe, 17.20 is a pressure gauge, 18.19 is a flow meter, 22 is a pressure setting device, 25 is a flow rate setting device, 26 is a viscometer, 23, 2B are comparison It is a calculation controller.
Claims (1)
入管と戻り管とより成る二重管式注入ロツドを有し、注
入管路及び戻り管路中に圧力検知器と流量検知器とを設
け、夫々の検知信号と、圧力設定器、流量設定器にて予
め設定した設定信号と、粘度計とより得られる臨界流量
の設定信号とを、一比較演算制御器によって比較演算し
て得られる出力信号により、流量制御弁及び注入ポンプ
のサーボ機構を作動し、グラウトの注入圧力と注入量と
を制御するように構成したことを特徴とするグラウト注
入装置。1. A grout injection device installed in a drilling machine has a double-pipe injection rod consisting of an injection pipe and a return pipe, and a pressure detector and a flow rate detector are installed in the injection pipe and the return pipe, respectively. The detection signal, the setting signal preset by the pressure setting device and flow rate setting device, and the critical flow setting signal obtained from the viscometer are compared and calculated by a comparison calculation controller, and the output signal is obtained. A grout injection device, characterized in that it is configured to operate a servo mechanism of a flow rate control valve and an injection pump to control the injection pressure and amount of grout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15479180A JPS586803B2 (en) | 1980-11-04 | 1980-11-04 | grouting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15479180A JPS586803B2 (en) | 1980-11-04 | 1980-11-04 | grouting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5781516A JPS5781516A (en) | 1982-05-21 |
| JPS586803B2 true JPS586803B2 (en) | 1983-02-07 |
Family
ID=15591969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15479180A Expired JPS586803B2 (en) | 1980-11-04 | 1980-11-04 | grouting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS586803B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5286720A (en) * | 1992-07-16 | 1994-02-15 | Solarcare Technologies Corporation | Compositions and methods for topical treatment of skin lesions |
| US6874976B2 (en) * | 2003-02-21 | 2005-04-05 | Kyokado Engineering Co., Ltd. | Multipoint grouting method and apparatus therefor |
| FI20105172A7 (en) * | 2010-02-23 | 2011-08-24 | Uretek Worldwide Oy | Method and apparatus for injecting material into soil |
| FI20106346A7 (en) | 2010-12-20 | 2012-06-21 | Uretek Worldwide Oy | Method and arrangement for supporting a structure |
-
1980
- 1980-11-04 JP JP15479180A patent/JPS586803B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5781516A (en) | 1982-05-21 |
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