JPH0474485B2 - - Google Patents
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- Publication number
- JPH0474485B2 JPH0474485B2 JP60099671A JP9967185A JPH0474485B2 JP H0474485 B2 JPH0474485 B2 JP H0474485B2 JP 60099671 A JP60099671 A JP 60099671A JP 9967185 A JP9967185 A JP 9967185A JP H0474485 B2 JPH0474485 B2 JP H0474485B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon dioxide
- dioxide gas
- pressure
- ground
- 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 - Lifetime
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、主として水ガラス系固結薬液と炭
酸ガスを軟弱地盤または漏水地盤等の地盤に合流
注入して地盤の固結または止水を図る薬液注入装
置に関する。[Detailed Description of the Invention] Industrial Application Field The present invention mainly relates to a chemical solution for solidifying the ground or stopping water by jointly injecting a water glass-based solidifying chemical solution and carbon dioxide gas into soft ground, leaky ground, etc. Relating to an injection device.
従来の技術
従来、水ガラス（ケイ酸ナトリウム）水溶液と
炭酸ガスを硬化剤とする薬液を軟弱または漏水地
盤中に注入して地盤の固結または止水を図る薬液
注入固結工法が採用されている。Conventional technology Conventionally, a chemical injection consolidation method has been adopted in which a chemical solution containing water glass (sodium silicate) and carbon dioxide gas as hardening agents is injected into soft or leaking ground to solidify the ground or stop water. There is.
水ガラス水溶液と炭酸ガスを合流させて上記地
盤に注入するに当り、水ガラス水溶液に対して混
合すべき炭酸ガスを絶対量でほぼ一定割合で注入
しなければ均一な水ガラスの固結体が形成されな
い。その理由については、地盤内の圧力が変化す
ると、圧入される炭酸ガス量は大幅に変動し、水
ガラスとの比率が一定しなくなり、水ガラスと炭
酸ガスの反応によつて生成する膠質状物にムラを
生じ、均一な固結体が得られないことが指摘され
ている。 When combining the water glass aqueous solution and carbon dioxide gas and injecting the mixture into the ground, a uniform solid of water glass must be injected into the water glass aqueous solution in an almost constant absolute amount of carbon dioxide gas to be mixed with the water glass aqueous solution. Not formed. The reason for this is that when the pressure in the ground changes, the amount of carbon dioxide gas injected changes significantly, the ratio with water glass becomes inconsistent, and a colloid-like substance is produced by the reaction between water glass and carbon dioxide gas. It has been pointed out that this causes unevenness and that a uniform solidified body cannot be obtained.
上記のような問題の解決策の一環として、特公
昭59−42769号公報に見られる薬液注入装置が提
案されるに至つた。この提案された装置は、「地
盤中に挿入された注入管と、前記注入管内に連結
された水ガラス貯槽と、前記注入管内に連結され
た炭酸ガス貯槽とを備えた薬液注入装置におい
て、前記炭酸ガス貯槽と前記注入管との間に圧力
変動感知装置を設けたことを特徴とし、
前記圧力変動感知装置は前記注入管と前記炭酸
ガス貯槽の間に下流へ向つて順次自動流量調節弁
と、差圧伝送器および開閉演算器を経て流量指示
調節器に連絡された流量計と、グラフイツク演算
器を経て同じく前記流量指示調節器に連絡された
圧力伝送器とが連絡されてなり、前記両演算器の
演算結果に基づき前記流量指示調節計が前記自動
流量調節弁を作動させることによつて炭酸ガスの
絶対流量を制御し、水ガラス水溶液と炭酸ガスの
絶対流量を一定比率で合流して注入する」ことに
ある。 As part of the solution to the above-mentioned problems, a chemical liquid injection device as seen in Japanese Patent Publication No. 59-42769 was proposed. This proposed device is a chemical liquid injection device comprising an injection pipe inserted into the ground, a water glass storage tank connected to the injection pipe, and a carbon dioxide gas storage tank connected to the injection pipe. A pressure fluctuation sensing device is provided between the carbon dioxide gas storage tank and the injection pipe, and the pressure fluctuation sensing device includes an automatic flow rate control valve and an automatic flow rate control valve in order downstream between the injection pipe and the carbon dioxide storage tank. , a flow meter connected to the flow rate indicating regulator via a differential pressure transmitter and a switching calculator, and a pressure transmitter also connected to the flow rate indicating regulator via a graphic computing unit, Based on the calculation result of the calculator, the flow rate indicating controller controls the absolute flow rate of carbon dioxide gas by operating the automatic flow rate control valve, and the absolute flow rates of the water glass aqueous solution and carbon dioxide gas are combined at a constant ratio. It is about "injecting".
発明が解決しようとする問題点
ところで、このような従来の薬液注入装置にお
いては、炭酸ガス貯槽と注入管との間に圧力変動
感知装置を設けることによつて、地盤圧（Kg／
cm2）の変動にもかかわらず水ガラス水溶液と炭酸
ガスの絶対流量を一定比率で合流させて地盤中に
注入することを可能とする利益をもたらすことが
できる。しかしながら、実践の場においては、地
盤圧の変動を感知し、加圧炭酸ガス量を地盤圧に
対応させて圧送するための制御システムが複雑化
されるために、制御システムの設備費が嵩み、か
つ各制御要素の性能チエツク及び管理、維持に細
心の運転管理を必要とする実用上の問題がある。Problems to be Solved by the Invention Incidentally, in such a conventional chemical injection device, by providing a pressure fluctuation sensing device between the carbon dioxide storage tank and the injection pipe, the ground pressure (Kg/
cm 2 ), the absolute flow rates of the water glass solution and carbon dioxide gas can be combined at a constant ratio and injected into the ground. However, in practice, the control system that senses changes in ground pressure and pumps the amount of pressurized carbon dioxide in response to the ground pressure is complicated, resulting in increased equipment costs for the control system. In addition, there is a practical problem that requires careful operation management to check, manage, and maintain the performance of each control element.
したがつて、加圧炭酸ガスの絶対流量の制御を
簡素化し、地盤圧の許容範囲内で水ガラス水溶液
に対する炭酸ガス量を一定比率で合流させて地盤
中に注入しなければならない。 Therefore, it is necessary to simplify the control of the absolute flow rate of the pressurized carbon dioxide gas and inject it into the ground by combining the amount of carbon dioxide gas with respect to the water glass aqueous solution at a constant ratio within the allowable range of the ground pressure.
問題点を解決するための手段
この発明は前記問題点を解決するものであつ
て、以下にその内容を実施例に対応する第１図を
用いて説明する。第１図はこの発明の基本概念を
示す図である。Means for Solving the Problems This invention solves the above-mentioned problems, and the details thereof will be explained below using FIG. 1 corresponding to an embodiment. FIG. 1 is a diagram showing the basic concept of this invention.
図において、１は注入材としての水ガラス水溶
液貯槽、２は注入ポンプ、３は流量計であつて、
水ガラス水溶液は、注入ポンプによつて定められ
た流量で吐液されて流量計を通して配管４により
地盤５中と挿入される注入管６内に圧入させる。
以上は前記従来の薬液注入装置の水ガラス注入系
路と同様である。ここで水ガラス水溶液貯槽１か
ら注入管６を含む管路を注入材送液管路という。 In the figure, 1 is a water glass aqueous solution storage tank as an injection material, 2 is an injection pump, and 3 is a flow meter,
The water glass aqueous solution is discharged at a predetermined flow rate by an injection pump, passes through a flow meter, and is forced into an injection pipe 6 inserted into the ground 5 through a pipe 4.
The above is the same as the water glass injection system of the conventional chemical liquid injection device. Here, the pipe line including the injection pipe 6 from the water glass aqueous solution storage tank 1 is referred to as the injection material feeding pipe line.
この発明においては、炭酸ガス高圧容器７の口
金に配管８が接続され、この配管の末端部は前記
注入管６に連結される。前記配管８の管路上に減
圧弁９と、円板１０ａの中心部にノズル孔１０ｂ
を穿つた炭酸ガス吹出ノズル１０が配管８に設け
たフランジ間にボルト締めされて取付けられて薬
液注入装置が構成される。 In this invention, a pipe 8 is connected to the cap of the high-pressure carbon dioxide gas container 7, and the end of this pipe is connected to the injection pipe 6. A pressure reducing valve 9 is provided on the pipe 8, and a nozzle hole 10b is provided in the center of the disk 10a.
A carbon dioxide gas blowing nozzle 10 having a hole therein is bolted and attached between flanges provided on the piping 8, thereby constructing a chemical liquid injection device.
上記配管８には、ノズル孔径を異にしたそのノ
ズル１０を取り換え可能に取付けるように設けて
おく。また、ノズル孔径を異にした炭酸ガス吹出
ノズル１０を数個並列に、炭酸ガス圧送配管８に
並設し、それぞれのノズル１０を切換可能に設け
ておいてもよい。 The piping 8 is provided so that nozzles 10 having different nozzle hole diameters can be attached thereto for replacement. Alternatively, several carbon dioxide gas blowing nozzles 10 having different nozzle hole diameters may be arranged in parallel in the carbon dioxide gas pressure feeding pipe 8, and each nozzle 10 may be provided so as to be switchable.
作 用
次に作用を第２図および第３図の実験結果を図
表化した図に基づいて説明する。Effect Next, the effect will be explained based on the graphs of the experimental results shown in FIGS. 2 and 3.
第２図は、円板（板厚３mm）の中心部に0.8mm
のノズル孔径を穿ち、炭酸ガス圧（35，30，25
Kg／cm2）と炭酸ガス吹出量との関係を示す図であ
り、設定炭酸ガス圧において炭酸ガス吹出量
（ｇ／min）は、ある範囲内で一定の流量となり、
ある限界点で炭酸ガス吹出量は漸次減少して行く
ことが判る。したがつて、地盤圧に対応する炭酸
ガス吹出量は炭酸ガス圧をかえることによつて制
御することができる。 Figure 2 shows 0.8mm in the center of the disk (thickness: 3mm).
Drill a nozzle hole with a diameter of
Kg/cm 2 ) and the amount of carbon dioxide gas blown out. At the set carbon dioxide pressure, the amount of carbon dioxide gas blown out (g/min) is a constant flow rate within a certain range,
It can be seen that the amount of carbon dioxide gas blown out gradually decreases at a certain limit point. Therefore, the amount of carbon dioxide gas blown out corresponding to the ground pressure can be controlled by changing the carbon dioxide pressure.
炭酸ガス圧は減圧弁によつて任意に変えること
ができる。 Carbon dioxide pressure can be changed arbitrarily using a pressure reducing valve.
第３図は、炭酸ガス圧を一定（35Kg／cm2）にし
てノズル孔径を異にした場合の炭酸ガス吹出量と
の関係を示す図であつて、ノズル孔径を異にした
炭酸ガス吹出ノズルを数個組合せることによつ
て、地盤圧に対応する炭酸ガス吹出量を任意に制
御することが可能となる。 FIG. 3 is a diagram showing the relationship between the carbon dioxide gas blowing amount and the case where the nozzle hole diameter is varied while keeping the carbon dioxide pressure constant (35 kg/cm 2 ). By combining several of them, it becomes possible to arbitrarily control the amount of carbon dioxide gas blown out corresponding to the ground pressure.
図中のＩ線は、ノズル孔径１mmのノズル２個
（ノズル１個の炭酸ガス吹出量450g／min）とノ
ズル孔径0.4mmのノズル（吹出量100g／min）１
個を同時に使用した場合の炭酸ガス吹出量を示
す。 The I line in the figure shows two nozzles with a nozzle hole diameter of 1 mm (carbon dioxide gas blowout amount of one nozzle: 450 g/min) and one nozzle with a nozzle hole diameter of 0.4 mm (blowout amount of 100 g/min).
This shows the amount of carbon dioxide gas blown out when both are used at the same time.
また、同図から炭酸ガス圧を一定にした場合に
は、ノズル孔径を異にした炭酸ガス吹出ノズルを
地盤圧に対応させて取換えて使用することもでき
る。 Further, as shown in the figure, when the carbon dioxide gas pressure is kept constant, carbon dioxide gas blowing nozzles with different nozzle hole diameters can be replaced and used in accordance with the ground pressure.
地盤に対応する炭酸ガス圧は、炭酸ガス高圧容
器に連結される炭酸ガス圧送管路上に設けた減圧
弁で減圧させて炭酸ガス留器内の圧力を所定の圧
力に制御することによつて炭酸ガス圧を任意に変
えることができる。 The carbon dioxide pressure corresponding to the ground is reduced by a pressure reducing valve installed on the carbon dioxide gas pressure transmission pipe connected to the carbon dioxide high pressure container, and the pressure inside the carbon dioxide gas distiller is controlled to a predetermined pressure. Gas pressure can be changed arbitrarily.
実施例
第４図はこの発明の一実施例を示す図であつ
て、水ガラス水溶液貯槽１内に貯えられた水ガラ
ス水溶液は注入ポンプ２によつてその定量が吐液
されて流量計３で流量を確認し、配管４を通して
地盤５中に挿入される注入管６内に注入される。
注入ポンプ２の吸入側の配管４に元弁SVが設け
られている。Embodiment FIG. 4 is a diagram showing an embodiment of the present invention, in which a fixed amount of the water glass solution stored in the water glass solution storage tank 1 is discharged by the injection pump 2 and the flow meter 3 After checking the flow rate, the liquid is injected into the injection pipe 6 inserted into the ground 5 through the pipe 4.
A main valve SV is provided in the piping 4 on the suction side of the injection pump 2.
液化炭酸ガス高圧容器７，７′，７″の口金に炭
酸ガス圧送配管８が連結され、この配管上に、元
弁SV、加熱器１１、減圧弁９、炭酸ガス留器１
２が設けられ、液化炭酸ガスは加熱器１１によつ
て気化炭酸ガスとなつて減圧弁９で所定の圧力に
減圧されて炭酸ガス留器１２内に所定の圧力で貯
えられる。前記ガス留器の後の配管に分岐管８
ａ，８ｂ，８ｃ，８ｄが並列に設けられ、各分岐
管に元弁Ｖ，Ｖ１，Ｖ２，Ｖ３が設けられると共
に炭酸ガス吹出ノズル１０，１０′，１０″，１０
が設けられ、各分岐管は配管８′に連結され、
この配管は炭酸ガス圧送配管８に連結される。前
記配管８の末端部は上記注入管６に連結される。
圧送される炭酸ガス圧は配管８に設けた圧力計Ｐ
１，Ｐ２によつて確認される。 A carbon dioxide gas pressure-feeding pipe 8 is connected to the caps of the liquefied carbon dioxide gas high-pressure containers 7, 7', 7'', and on this pipe, a main valve SV, a heater 11, a pressure reducing valve 9, and a carbon dioxide gas distiller 1 are installed.
2 is provided, and the liquefied carbon dioxide is converted into vaporized carbon dioxide by the heater 11, reduced to a predetermined pressure by the pressure reducing valve 9, and stored at a predetermined pressure in the carbon dioxide gas distiller 12. A branch pipe 8 is installed in the pipe after the gas retainer.
a, 8b, 8c, and 8d are provided in parallel, and each branch pipe is provided with main valves V, V1, V2, and V3, and carbon dioxide gas blowing nozzles 10, 10', 10'', 10
is provided, each branch pipe is connected to piping 8',
This pipe is connected to a carbon dioxide gas pressure feeding pipe 8. The distal end of the pipe 8 is connected to the injection pipe 6.
The pressure of the carbon dioxide gas to be pumped is determined by the pressure gauge P installed in the pipe 8.
1, confirmed by P2.
上記炭酸ガス吹出ノズル１０，１０′１０″，１
０はノズル孔径を異にしており、地盤圧に対応
する炭酸吹出量を単一の炭酸ガス吹出ノズルまた
は二以上のノズルの組合せによつて制御して水ガ
ラス水溶液と炭酸ガスの流量を一定比率で合流し
て注入管６を介して地盤内に注入させる。本発明
における地盤注入用注入材としては水ガラス水溶
液あるいは、水ガラスと反応側の混合液あるいは
セメントを含む注入液等、アルカリを含んでいて
そのアルカリが炭酸ガスと中和反応を生ずる注入
材を用いる事ができる。 The above carbon dioxide gas blowing nozzle 10, 10'10'', 1
0 has different nozzle hole diameters, and the flow rate of the water glass aqueous solution and carbon dioxide gas is controlled at a constant ratio by controlling the amount of carbon dioxide blowing out corresponding to the ground pressure using a single carbon dioxide gas blowing nozzle or a combination of two or more nozzles. , and are injected into the ground via the injection pipe 6. In the present invention, the injection material for ground injection is an injection material that contains an alkali and the alkali causes a neutralization reaction with carbon dioxide gas, such as an aqueous water glass solution, a mixed solution of water glass and a reaction side, or an injection solution containing cement. It can be used.
発明の効果
以上説明したように、この発明は炭酸ガス吹出
ノズルの孔径と炭酸ガス圧を任意に変更するのみ
で、地盤圧に対応する炭酸ガス吹出量が簡単に得
られ、水ガラス水溶液と炭酸ガスとを一定の比率
で合流して地盤中に注入することができるので、
均一の固結体が得られる効果をもたらす。Effects of the Invention As explained above, in this invention, by simply changing the hole diameter of the carbon dioxide gas blowing nozzle and the carbon dioxide gas pressure, the amount of carbon dioxide gas blowing out corresponding to the ground pressure can be easily obtained. Since it can be combined with gas at a certain ratio and injected into the ground,
It brings about the effect of obtaining a uniform solidified body.
なお、炭酸ガス流量の制御は炭酸ガス吹出ノズ
ルによつて行なうので、薬液注入操作も簡単とな
り、薬液注入の容易性および費用の点で大きな改
善が期待できる。 In addition, since the carbon dioxide gas flow rate is controlled by the carbon dioxide gas blowing nozzle, the chemical liquid injection operation is also simplified, and a significant improvement can be expected in terms of ease of chemical liquid injection and cost.
第１図はこの発明の基本概念を示す図、第２図
は炭酸ガス吹出ノズルの孔径0.8mmにおける炭酸
ガス圧と炭酸ガス吹出量との関係を示す図、第３
図は炭酸ガス圧35Kg／cm2におけるノズル孔径と炭
酸ガス吹出量の関係を示す図、第４図はこの発明
の実施例を示す図である。
図中、１は水ガラス水溶液貯槽、２は注入ポン
プ、３は流量計、６は注入管、７は炭酸ガス高圧
容器、９は減圧弁、１０は炭酸ガス吹出ノズル、
１１は加熱器、１２は炭酸ガス留器である。
Fig. 1 is a diagram showing the basic concept of this invention, Fig. 2 is a diagram showing the relationship between carbon dioxide gas pressure and carbon dioxide gas blowout amount at a hole diameter of 0.8 mm of the carbon dioxide gas blowing nozzle, and Fig. 3
The figure shows the relationship between the nozzle hole diameter and the amount of carbon dioxide gas blown out at a carbon dioxide pressure of 35 kg/cm 2 , and FIG. 4 is a diagram showing an embodiment of the present invention. In the figure, 1 is a water glass aqueous solution storage tank, 2 is an injection pump, 3 is a flow meter, 6 is an injection pipe, 7 is a carbon dioxide gas high pressure container, 9 is a pressure reducing valve, 10 is a carbon dioxide gas blowing nozzle,
11 is a heater, and 12 is a carbon dioxide gas distiller.
Claims (1)
ガス留器を備えた炭酸ガス圧送管路を介して連結
された炭酸ガス高圧容器とからなり、該炭酸ガス
圧送管路に円板の中心部に任意の大きさの孔径を
穿つた炭酸ガス吹出ノズルを設けたことを特徴と
する薬液注入装置。 ２ 炭酸ガス吹出ノズルとして、円板の中心部に
任意の大きさの孔径を穿つたノズルを取り替え可
能に炭酸ガス圧送管路に設けた特許請求の範囲第
１項記載の薬液注入装置。 ３ ノズル孔径を異にした炭酸ガス吹出ノズルを
数個並列に炭酸ガス圧送管路に切替可能に設けた
特許請求の範囲第１項記載の薬液注入装置。[Scope of Claims] 1. Consisting of an injection material delivery pipeline for ground injection and a carbon dioxide gas high pressure container connected via a carbon dioxide gas pressure delivery pipeline equipped with a pressure reducing valve and a carbon dioxide gas reservoir, the carbon dioxide gas A chemical liquid injection device characterized in that a carbon dioxide gas blowing nozzle having a hole of an arbitrary size is provided in the center of a disk in a pressure-feeding conduit. 2. The chemical liquid injector according to claim 1, wherein the carbon dioxide gas blowing nozzle is a nozzle having a hole of an arbitrary size formed in the center of a disc and is replaceably provided in the carbon dioxide gas pressure-feeding conduit. 3. The chemical liquid injection device according to claim 1, wherein several carbon dioxide gas blowing nozzles with different nozzle hole diameters are arranged in parallel and switchable to the carbon dioxide gas pressure feeding pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9967185A JPS61261514A (en) | 1985-05-13 | 1985-05-13 | Chemical grout injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9967185A JPS61261514A (en) | 1985-05-13 | 1985-05-13 | Chemical grout injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61261514A JPS61261514A (en) | 1986-11-19 |
| JPH0474485B2 true JPH0474485B2 (en) | 1992-11-26 |
Family
ID=14253494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9967185A Granted JPS61261514A (en) | 1985-05-13 | 1985-05-13 | Chemical grout injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61261514A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9714741B2 (en) | 2014-02-20 | 2017-07-25 | Pcs Ferguson, Inc. | Method and system to volumetrically control additive pump |
| US10106943B2 (en) * | 2015-08-31 | 2018-10-23 | Keystone Supports, Inc. | System, method, and apparatus for permeation grouting |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844103B2 (en) * | 1976-12-02 | 1983-09-30 | 日東化学工業株式会社 | Soil stabilization method |
| JPS5942769A (en) * | 1982-08-31 | 1984-03-09 | Yuasa Battery Co Ltd | Manufacture of lead-acid battery |
-
1985
- 1985-05-13 JP JP9967185A patent/JPS61261514A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61261514A (en) | 1986-11-19 |
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| LAPS | Cancellation because of no payment of annual fees |