JPH101936A - Injection method of two liquid curable grout and specific gravity measuring device of soil improvement grout liquid employed for the same device - Google Patents
Injection method of two liquid curable grout and specific gravity measuring device of soil improvement grout liquid employed for the same deviceInfo
- Publication number
- JPH101936A JPH101936A JP15508896A JP15508896A JPH101936A JP H101936 A JPH101936 A JP H101936A JP 15508896 A JP15508896 A JP 15508896A JP 15508896 A JP15508896 A JP 15508896A JP H101936 A JPH101936 A JP H101936A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- grout
- specific gravity
- aqueous solution
- water glass
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 127
- 230000005484 gravity Effects 0.000 title claims abstract description 61
- 239000011440 grout Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002347 injection Methods 0.000 title abstract description 32
- 239000007924 injection Substances 0.000 title abstract description 32
- 239000002689 soil Substances 0.000 title 1
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000003860 storage Methods 0.000 claims description 27
- 238000005259 measurement Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 48
- 235000019353 potassium silicate Nutrition 0.000 description 47
- 239000007864 aqueous solution Substances 0.000 description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000011550 stock solution Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 239000000376 reactant Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000499 gel Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、２液硬化性グラウ
トの注入工法およびこれに用いる地盤改良用グラウト液
の比重測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-liquid curable grout injection method and a specific gravity measuring device for ground improvement grout liquid used in the method.
【０００２】[0002]
【従来の技術】グラウト注入工法は、止水と地盤強化と
いう二つの目的を同時に達成できることや、土木工事等
には極めて簡便であることなど他に類を見ない地盤改良
工法として多用されてきた。この種の注入工法として
は、古くは１液のグラウトを注入していたが、その後に
改良されて、２液硬化性グラウトの各液を注入管の基端
に設けたＹ字管にて合流させる方法に代わり、さらに、
現在では、注入管内部あるいは外部において両液を合流
させ、混合した後、周辺地盤に注入するものが主流とな
っている。2. Description of the Related Art The grout pouring method has been widely used as an unprecedented ground improvement method because it can achieve the two purposes of stopping water and strengthening the ground at the same time, and is extremely simple for civil engineering work. . In this type of injection method, in the past, one liquid grout was injected, but after that it was improved and the two liquid curable grout liquids were joined by a Y-tube provided at the base end of the injection pipe. As an alternative to
At present, the mainstream is to mix both liquids inside or outside the injection pipe, mix them, and then inject them into the surrounding ground.
【０００３】２液硬化性グラウトの主剤の種類として
は、種々のものが知られているおり、現在は水ガラス
（ケイ酸ソーダ）系のものが主流である。この水ガラス
に対して、反応剤としては、酸、酸塩等がある。特に最
近では、安価で無害であるなどの利点から反応剤に炭酸
水を用いることが多い。[0003] Various types of main components of the two-component curable grout are known, and currently, a water glass (sodium silicate) type is the mainstream. The reactants for the water glass include acids, acid salts and the like. Particularly recently, carbonated water is often used as a reactant because of its advantages such as low cost and harmlessness.
【０００４】また、このような地盤注入工法において
は、一般に、主剤原液を直接に反応剤と混合させるので
はなく、主剤原液と水とを所定の混合比で混合した主剤
水溶液が反応剤と混合する。したがって、主剤水溶液の
濃度を所定の値に調節・保持することは、地盤改良剤の
持つ能力を最大限に発揮させる上で非常に重要である。[0004] In addition, in such a ground injection method, an aqueous solution of a base material obtained by mixing a stock solution of a base material and water at a predetermined mixing ratio is not generally mixed directly with a stock solution of a base material. I do. Therefore, it is very important to adjust and maintain the concentration of the aqueous solution of the base material at a predetermined value in order to maximize the ability of the soil conditioner.
【０００５】この主剤水溶液の濃度を調節する方法とし
て、主剤原液および水をそれぞれ計量して主剤水溶液の
貯留タンク（以下、主剤水溶液タンクという）に導入す
る、いわゆるバッチ式のものが一般的である。As a method of adjusting the concentration of the aqueous solution of the base material, a so-called batch type is generally used, in which the stock solution of the main material and water are respectively measured and introduced into a storage tank for the solution of the base material (hereinafter referred to as a base solution aqueous tank). .
【０００６】これに対して、本出願人は、特願平７−１
８２９２７号において、三方管を用いて主剤原液および
水を合流混合させる方法を提案した。この方法は、三方
管の出側に設けたプランジャーポンプなどの注入ポンプ
による吸引・吐出によって、この三方管に主剤原液およ
び水をそれぞれ吸引・導入して合流混合させるものであ
り、主剤水溶液タンクを省略できるとともに、バッチレ
スに主剤水溶液の調製が行える利点がある。On the other hand, the present applicant has filed Japanese Patent Application No. 7-1.
In No. 82927, a method was proposed in which a stock solution of the main agent and water were combined and mixed using a three-way tube. In this method, the main solution and the water are respectively sucked and introduced into the three-way tube by suction and discharge by an injection pump such as a plunger pump provided on the outlet side of the three-way tube, and then mixed and mixed. The advantage is that the main ingredient aqueous solution can be prepared batchlessly.
【０００７】[0007]
【発明が解決しようとする課題】一般に、対象地盤の性
状に応じて、注入過程中においてゲルタイムや強度を変
える必要があるために、水ガラス水溶液の濃度管理が重
要である。また、水ガラス水溶液の濃度は比重と相関
し、比重は温度依存性がある。Generally, it is necessary to change the gel time and strength during the pouring process according to the properties of the target ground, so that the concentration control of the water glass aqueous solution is important. The concentration of the aqueous solution of water glass correlates with the specific gravity, and the specific gravity has a temperature dependency.
【０００８】しかるに、上述のバッチ式の主水溶液液調
製方法においては、主剤水溶液タンクからサンプルを採
取して別個に用意された比重計によって比重を測定する
という比重管理が行えるものの、本出願人の提案したバ
ッチレス式の調製方法では、グラウト液の調製および供
給が連続して行われるために、かかるサンプルの採取お
よび比重測定が行えない。However, in the above-mentioned batch-type main aqueous solution preparation method, although specific gravity can be controlled by taking a sample from the main aqueous solution tank and measuring the specific gravity by using a separately prepared hydrometer. In the proposed batch-less preparation method, since the preparation and supply of the grout liquid are performed continuously, such a sample cannot be collected and the specific gravity cannot be measured.
【０００９】そこで、本発明の第１の課題は、グラウト
液の調製および供給をバッチレスに行う２液硬化性グラ
ウトの注入工法においても、グラウト液の比重測定を可
能とすることにある。Therefore, a first object of the present invention is to make it possible to measure the specific gravity of a grout liquid even in a two-liquid curable grout injection method for preparing and supplying a grout liquid in a batchless manner.
【００１０】第２の課題は、この２液硬化性グラウトの
注入工法に最適な地盤改良用グラウト液の比重測定装置
を提案することにある。A second object is to propose an apparatus for measuring a specific gravity of a grout liquid for ground improvement which is most suitable for the injection method of the two-liquid curable grout.
【００１１】[0011]
【課題を解決するための手段】前述の課題を達成した本
発明のうち、請求項１に記載の発明は、Ｘ液とＹ液とを
所定の比率で合流混合部分において合流混合して地盤改
良用グラウト液とするものであって、前記グラウト液の
供給路の途中に、開閉弁を介して比重測定手段を接続
し、測定時において前記開閉弁を開けて、前記グラウト
液の一部を比重測定手段に導入して比重を測定すること
を特徴とする２液硬化性グラウトの注入工法である。Among the inventions that have achieved the above-mentioned objects, the invention according to claim 1 is to improve the ground by merging and mixing the X liquid and the Y liquid at a predetermined ratio in the merging and mixing portion. A grout liquid for use, a specific gravity measuring means is connected via an on-off valve in the middle of the grout liquid supply path, and the on-off valve is opened at the time of measurement to allow a part of the grout liquid to have a specific gravity. This is a two-component curable grout injection method characterized by being introduced into a measuring means to measure the specific gravity.
【００１２】また、請求項２に記載の発明は、地盤改良
用グラウト液の供給路の途中に開閉弁を介して連通して
設けられた実質的に鉛直状態で配置された貯留管と、こ
の貯留管の高さ方向中間に分岐して連通し、かつ中間部
が前記分岐部よりも高位の部分を有し末端が前記高位部
分より下方に位置して排出口が形成された液面調整用ド
レン管と、前記貯留管内に遊びをもって内装された比重
浮標とを備え、前記比重浮標は、貯留管内に導入され、
前記高位部分の高さ方向位置に対応して決められる前記
グラウト液の液面に対して自立しながら浮く関係にある
ことを特徴とする地盤改良用グラウト液の比重測定装置
である。[0012] Further, the invention according to claim 2 provides a storage pipe arranged in a substantially vertical state and provided in the middle of a ground improvement grout liquid supply path via an on-off valve, and For liquid level adjustment in which the storage pipe is branched and communicated at the middle in the height direction, and the middle part has a portion higher than the branch portion and the end is located below the high portion and the discharge port is formed. A drain pipe and a specific gravity buoy internally mounted with play in the storage pipe, wherein the specific gravity buoy is introduced into the storage pipe,
An apparatus for measuring the specific gravity of a ground improvement grout liquid, characterized in that the grout liquid is self-sustaining and floats on a liquid surface of the grout liquid determined according to a height direction position of the high portion.
【００１３】[0013]
【発明の実施の形態】以下、本発明を図面を参照しなが
ら詳述する。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings.
【００１４】図１は、本発明の基本構成図であり、Ｘ液
とＹ液とを所定の比率で合流混合部分において合流混合
して地盤改良用グラウト液とするものである。FIG. 1 is a basic structural diagram of the present invention, in which a liquid X and a liquid Y are merged and mixed at a predetermined ratio in a merging and mixing section to obtain a ground improvement grout liquid.
【００１５】Ｘ液およびＹ液は、合流混合部分を構成す
るたとえばＴ字管４に導入されるよう配管されている。
Ｔ字管４と仕向け先たとえば注入管９との間には、前記
Ｘ液およびＹ液をそれぞれ吸引・吐出させて注入管９に
供給するたとえば注入ポンプ、たとえばプランジャー型
やピストンポンプなどのの吸引吐出ポンプ６が設けられ
ている。さらに、この吸引吐出ポンプ６と注入管９との
間には、比重測定手段７がグラウト液導入弁７ａを介し
て分岐して配置される。好適な比重測定手段７について
は後述の具体例において述べるが、単にグラウト液の貯
留手段とこの貯留手段内に配される比重浮標とからなる
ものでも良い。The X liquid and the Y liquid are piped so as to be introduced into, for example, a T-tube 4 constituting a merging and mixing section.
Between the T-shaped pipe 4 and the destination, for example, the injection pipe 9, a liquid such as an injection pump, for example, a plunger type or a piston pump, which sucks and discharges the X liquid and the Y liquid and supplies the liquid to the injection pipe 9. A suction / discharge pump 6 is provided. Further, a specific gravity measuring means 7 is arranged between the suction and discharge pump 6 and the injection pipe 9 in a branched manner via a grout liquid introduction valve 7a. The preferred specific gravity measuring means 7 will be described in a specific example described later, but may simply be composed of a grout liquid storing means and a specific gravity buoy disposed in the storing means.
【００１６】この態様においては、吸引吐出ポンプ６の
吸引・吐出によって、Ｘ液およびＹ液はＴ字管４に導入
され混合された後、注入管９にグラウト液として送液さ
れる。ここで、グラウト液導入弁７ａを僅かに開放して
グラウト液を比重測定手段７に導入することにより比重
測定を行うことができる。この場合、グラウト液の一部
のみが比重測定手段７に導入され残部は注入管９に送液
されるので、バッチレスなグラウト液の調製・供給・注
入を行いつつもその比重測定を行うことができる。かか
る比重測定手段によって、測定された比重値を所定の比
重目標値と比較し、偏差が生じている場合には、この偏
差を無くすべくグラウト液濃度を調節する。In this embodiment, the X liquid and the Y liquid are introduced into the T-shaped tube 4 by the suction / discharge of the suction / discharge pump 6 and mixed, and then sent to the injection pipe 9 as grout liquid. Here, the specific gravity can be measured by slightly opening the grout liquid introduction valve 7a and introducing the grout liquid into the specific gravity measuring means 7. In this case, since only a part of the grout solution is introduced into the specific gravity measuring means 7 and the remaining part is sent to the injection pipe 9, the specific gravity measurement can be performed while batchless preparation, supply and injection of the grout solution. it can. The specific gravity value measured by the specific gravity measuring means is compared with a predetermined specific gravity target value. If a deviation occurs, the grout liquid concentration is adjusted to eliminate the deviation.
【００１７】グラウト液の濃度を任意に調節しうるＸ液
およびＹ液の合流混合方法として、例えば図２〜４に示
す態様が提案される。なお、これらの態様において、グ
ラウト液導入弁７ａおよび比重測定手段７の動作は図１
の態様と同一である。As a confluent mixing method of the X liquid and the Y liquid, which can arbitrarily adjust the concentration of the grout liquid, for example, the embodiments shown in FIGS. 2 to 4 are proposed. In these embodiments, the operations of the grout liquid introducing valve 7a and the specific gravity measuring means 7 are shown in FIG.
This is the same as the embodiment.
【００１８】図２に示す態様においては、Ｘ液の供給路
におけるＴ字管４に至る途中には、回転数可変の定量ポ
ンプ３が設けられ、この定量ポンプ３とＴ字管４との間
に、Ｔ字管４側から定量ポンプ３の吐出口側に向かって
付勢される付勢弁（逆止弁）５が設けられている。In the embodiment shown in FIG. 2, a variable-speed metering pump 3 is provided on the way to the T-shaped tube 4 in the X-liquid supply path, and between the metering pump 3 and the T-shaped tube 4. In addition, an urging valve (check valve) 5 which is urged from the T-tube 4 side toward the discharge port side of the metering pump 3 is provided.
【００１９】さらに、前記定量ポンプ３には回転数を人
力または自動にて制御して、Ｔ字管４に向かうＸ液の送
液量を調節する手段、たとえば人力による場合には操作
部材、自動にて行う場合にはインバーターに対する選択
スイッチ類が設けられている。図２におけるＰＩは圧力
指示計である。Further, means for controlling the number of revolutions of the metering pump 3 manually or automatically so as to adjust the amount of the X liquid to be sent to the T-shaped tube 4, for example, an operating member or an automatic member in the case of manual operation. In the case of performing the above, selection switches for the inverter are provided. PI in FIG. 2 is a pressure indicator.
【００２０】かかる構成の下で、Ｘ液およびＹ液を合流
混合させてグラウト液を調製するに際しては、吸引吐出
ポンプ６を起動させて、所定の吸引吐出力で運転する。
定量ポンプ３を起動させない場合には、Ｙ液のみがＴ字
管４を通って吸引吐出ポンプ６により吸引吐出される。In such a configuration, when the X liquid and the Y liquid are combined and mixed to prepare a grout liquid, the suction / discharge pump 6 is started to operate at a predetermined suction / discharge force.
When the metering pump 3 is not activated, only the Y liquid is sucked and discharged by the suction and discharge pump 6 through the T-tube 4.
【００２１】かかるとき、定量ポンプ３を起動を起動さ
せてある回転数とすると、定量ポンプ３自体の機能から
してその回転数に見合った量（Ｑｘ）のＸ液が付勢弁５
に抗してＴ字管４に流入する。その結果、吸引吐出ポン
プ６はある運転条件の下では所定の吸引吐出量Ｑを示
し、その量は一定であるので、吸引吐出ポンプ６による
吸引力により、Ｙ液は、（Ｑ−Ｑｘ）の量（Ｑｙ）でＴ
字管４を通る。したがって、Ｔ字管４においては、Ｑｘ
／Ｑｙの比率でＸ液およびＹ液が合流混合し、吸引吐出
量Ｑをもって吸引吐出ポンプ６から注入管９にグラウト
液が送給される。At this time, assuming that the fixed-quantity pump 3 is activated at a predetermined rotational speed, an amount (Qx) of the X liquid commensurate with the rotational speed is determined by the function of the fixed-quantity pump 3 itself.
Flows into the T-shaped tube 4 against. As a result, the suction and discharge pump 6 shows a predetermined suction and discharge amount Q under a certain operating condition, and since the amount is constant, the Y liquid is (Q-Qx) due to the suction force of the suction and discharge pump 6. T in quantity (Qy)
Pass through the character tube 4. Therefore, in the T-tube 4, Qx
The X liquid and the Y liquid are combined and mixed at a ratio of / Qy, and the grout liquid is fed from the suction / discharge pump 6 to the injection pipe 9 with the suction / discharge amount Q.
【００２２】このグラウト液は、これ単独で地盤に注入
するほか、このグラウト液に対して、他の材料、たとえ
ば反応剤を供給して、合流させて地盤に注入することも
できる。本態様は、後の具体例で示すように、前記グラ
ウト液として主剤の水溶液を得る場合に好適に適用でき
る。また、前記反応剤としては、その主剤の水溶液に対
して硬化反応を示す反応剤とすることができる。The grouting liquid may be injected into the ground alone, or another material, for example, a reactant may be supplied to the grouting liquid to be merged and injected into the ground. This embodiment can be suitably applied when an aqueous solution of the main component is obtained as the grout liquid, as shown in the specific examples below. The reactant may be a reactant that shows a curing reaction with respect to the aqueous solution of the base material.
【００２３】Ｘ液を直接、およびＹ液を定量ポンプ３を
通して、それぞれＴ字管４に導くために、Ｘ液およびＹ
液の圧力が等しいことが望ましい。このための手段とし
て、図３に示す態様が提案される。In order to introduce the liquid X directly and the liquid Y through the metering pump 3 to the T-tube 4, respectively, the liquid X and the liquid Y are introduced.
It is desirable that the liquid pressures are equal. As a means for this, an embodiment shown in FIG. 3 is proposed.
【００２４】図３に示す態様においては、Ｘ液およびＹ
液は、それぞれポンプＰ１、ポンプＰ２によって仮貯留
タンク１、２に供給され、一時的に貯えられる。また、
各々の仮貯留タンク１、２には、ボールタップ１ａ、２
ａが設けられており、これと連動する弁１ｂ、２ｂによ
って貯留量が一定に保持される。その後、貯留されたＸ
液およびＹ液はそれぞれＴ字管４に、直接および定量ポ
ンプ３を通して導入される。他の構成および動作は図１
に示す態様と同一である。この態様によれば、仮貯留タ
ンク１、２におけるＸ液およびＹ液の液圧が実質的に等
しくできるので、定量ポンプ３によるＹ液の送液量のみ
の制御により水溶液濃度の調整を行うことができる。In the embodiment shown in FIG. 3, liquid X and liquid Y
The liquid is supplied to the temporary storage tanks 1 and 2 by the pump P1 and the pump P2, respectively, and temporarily stored. Also,
Each temporary storage tank 1, 2 has a ball tap 1a, 2
a is provided, and the stored amount is kept constant by the valves 1b and 2b interlocking with this. After that, the stored X
The liquid and the Y liquid are introduced into the T-tube 4 directly and through the metering pump 3, respectively. Other configurations and operations are shown in FIG.
It is the same as the embodiment shown in. According to this aspect, since the liquid pressures of the X liquid and the Y liquid in the temporary storage tanks 1 and 2 can be substantially equalized, the concentration of the aqueous solution can be adjusted by controlling only the liquid feed amount of the Y liquid by the metering pump 3. Can be.
【００２５】他方、図４に示すように、Ｘ液、Ｙ液およ
びＺ液の３液の合流混合を図ることができる。この場合
には、Ｔ字管４を直列に連結して、図示のとおりのフロ
ーにより３液の合流混合を図ることができる。On the other hand, as shown in FIG. 4, the three liquids of X liquid, Y liquid and Z liquid can be combined and mixed. In this case, the T-shaped tubes 4 can be connected in series, and the three liquids can be combined and mixed by the flow shown in the figure.
【００２６】図５には具体例を示す。図３の態様におい
て、Ｘ液として水ガラス原液、Ｙ液として水であり、Ｔ
字管４において、Ｘ液およびＹ液を所定の濃度で合流混
合させた水ガラス水溶液として、２連のプランジャーポ
ンプ６Ａ，６Ｂにおけるプランジャーポンプ６Ａにより
注入ホース８Ａを通して注入管９に供給する。ＱＩは流
量計であり、水の供給流量（濃度指標）の管理用として
いる。FIG. 5 shows a concrete example. In the embodiment of FIG. 3, the liquid X is water glass stock solution, the liquid Y is water, and
In the character tube 4, the X liquid and the Y liquid are combined and mixed at a predetermined concentration as a water glass aqueous solution and supplied to the injection pipe 9 through the injection hose 8A by the plunger pump 6A in the two plunger pumps 6A and 6B. QI is a flow meter for managing the supply flow rate (concentration index) of water.
【００２７】他方、仮貯留タンク２からの水をプランジ
ャーポンプ６Ｂにより吸引吐出させた後、ＣＯ2 ボンベ
１０からの液化炭酸ガスが濃度調整機１１により所定の
流量で合流弁装置１２に導かれる。この合流弁装置１２
では、仮貯留タンク２からの水と液化炭酸ガスとが合流
され、所定の濃度の炭酸水として合流混合され、注入ホ
ース８Ｂを通して注入管９に供給する。On the other hand, after the water from the temporary storage tank 2 is sucked and discharged by the plunger pump 6B, the liquefied carbon dioxide gas from the CO 2 cylinder 10 is guided to the confluent valve device 12 by the concentration adjuster 11 at a predetermined flow rate. . This merging valve device 12
In this case, the water and the liquefied carbon dioxide gas from the temporary storage tank 2 are combined, mixed and mixed as carbonated water having a predetermined concentration, and supplied to the injection pipe 9 through the injection hose 8B.
【００２８】濃度調整機１１においては、液化状態を維
持すべく冷却手段および所定量を吐出させるポンプなど
を備えている。The concentration adjuster 11 is provided with a cooling means and a pump for discharging a predetermined amount to maintain the liquefied state.
【００２９】注入管９の構造は、たとえば図示の構造と
される。すなわち、水ガラス水溶液は合流接触部９ｃに
そのまま導かれるのに対して、炭酸水は第１保圧弁９ａ
を通してこれを付勢力に抗して押し下げながら先端に向
かい、合流接触部９ｃにおいて合流接触し混合が図られ
た後、先端の第１保圧弁９ｂを通して地盤中に注入され
る。注入されたグラウト液は所定のゲルタイムでゲル化
する。The structure of the injection tube 9 is, for example, the structure shown in the figure. That is, while the aqueous solution of water glass is directly guided to the confluence contact portion 9c, the carbonated water is supplied to the first pressure holding valve 9a.
It is then pushed down against the urging force toward the tip, and is merged and contacted at the merging contact portion 9c for mixing, and then injected into the ground through the first pressure holding valve 9b at the tip. The injected grout liquid gels at a predetermined gel time.
【００３０】図６および図７は、上述のＴ字管４、定量
ポンプ３および付勢弁５のより具体的な態様を示してい
る。Ｔ字管４には、水入口４Ａ、水ガラス原液入口４
Ｂ、および合流混合水ガラス水溶液出口４ＣがＴ字状を
なして形成され、水入口４Ａを覆ようにして中央部に水
流通孔ｈを有する付勢用バネ固定座５Ａ（図８参照）が
設けられ、これと対向する水ガラス原液入口４Ｂを塞ぐ
ようにして、スプール弁５Ｂが配され、これらの間にス
プール弁５Ｂを水ガラス原液入口４Ｂ側に押圧する付勢
バネ５Ｃが配されている。FIGS. 6 and 7 show more specific aspects of the T-tube 4, the metering pump 3 and the urging valve 5. FIG. The T-tube 4 has a water inlet 4A, a water glass undiluted liquid inlet 4
B and a combined mixed water glass aqueous solution outlet 4C are formed in a T-shape, and a biasing spring fixing seat 5A (see FIG. 8) having a water circulation hole h in the center so as to cover the water inlet 4A is provided. A spool valve 5B is provided so as to close the water glass stock solution inlet 4B opposed thereto, and an urging spring 5C for pressing the spool valve 5B toward the water glass stock solution inlet 4B is provided therebetween. I have.
【００３１】また、スプール弁５Ｂを囲んで接するよう
に、スプール弁ガイド５Ｄが、Ｔ字管４内の水ガラス原
液入側の内壁から立設される。このスプール弁ガイド５
Ｄは、スプール弁５Ｂの少なくとも三方、より好適には
四方以上を囲んで接するように設けられており、このス
プール弁ガイド５Ｄに位置決めされながらスプール弁５
Ｂは図７の上下方向に移動する。A spool valve guide 5D is provided upright from the inner wall of the T-shaped tube 4 on the water glass stock solution inlet side so as to surround and contact the spool valve 5B. This spool valve guide 5
D is provided so as to surround and contact at least three sides, more preferably four or more sides of the spool valve 5B, and the spool valve 5 is positioned while being positioned by the spool valve guide 5D.
B moves up and down in FIG.
【００３２】一方、Ｔ字管４の水ガラス原液入口４Ｂに
は、圧力指示計ＰＩを配した管路４Ｄを介して、定量ポ
ンプ３の吐出側に連なっている。On the other hand, the water glass stock solution inlet 4B of the T-tube 4 is connected to the discharge side of the metering pump 3 via a pipe 4D provided with a pressure indicator PI.
【００３３】定量ポンプ３の構造は、回転数に応じて流
量がほぼ直線的に変化するものが用いられる限り、限定
はないが、たとえば泉ポンプ製作所製の「ＩＨＬシリー
ズＩＨＬ−４０」を用いることができる。ちなみに、そ
の構造について図６および図７を参照して簡単に説明す
ると、本体ケーシング３ａと蓋体３ｂとの間に、駆動軸
３ｃによって回転駆動される内歯歯車状部分を有するロ
ーター３ｄと、このローター３ｄの中心から偏心し、か
つローター３ｄの内歯に一部が噛み合って配置された外
歯歯車状のアイドラー３ｅと、ローター３ｄとアイドラ
ー３ｅとの間にあってサクション側とデリバリー側とを
仕切るスペーサー３ｆとが設けられている。The structure of the metering pump 3 is not limited as long as a pump whose flow rate changes substantially linearly according to the number of rotations is used. For example, "IHL series IHL-40" manufactured by Izumi Pump Mfg. Can be. Incidentally, the structure thereof will be briefly described with reference to FIGS. 6 and 7. A rotor 3 d having an internal gear-shaped portion rotationally driven by a drive shaft 3 c is provided between a main body casing 3 a and a lid 3 b. An external gear-shaped idler 3e that is eccentric from the center of the rotor 3d and partially meshed with the internal teeth of the rotor 3d, and separates the suction side and the delivery side between the rotor 3d and the idler 3e. A spacer 3f is provided.
【００３４】ローター３ｄが回転すると、これに噛み合
うアイドラー３ｅは蓋体３ｂの偏心軸回りに従動回転す
る。このとき、液はローター３ｄの内歯間を通ってアイ
ドラー３ｅの外歯間部分に流入する。これらは連続的に
回転するので、アイドラー３ｅの外歯間部分において液
を抱えながら、スペーサー３ｆの外側と本体ケーシング
３ａ内面との間を通って、図６の天位置に導く。天位置
においては、アイドラー３ｅの外歯間部分を通して液を
吐出させる。かかる動作が連続的に行われることによ
り、液（水ガラス原液）の吸引吐出が行われる。When the rotor 3d rotates, the idler 3e meshing with the rotor 3d is driven to rotate about the eccentric axis of the lid 3b. At this time, the liquid flows between the internal teeth of the rotor 3d and flows into the external teeth of the idler 3e. Since these rotate continuously, they pass between the outside of the spacer 3f and the inner surface of the main body casing 3a while holding the liquid in the portion between the external teeth of the idler 3e, and are guided to the top position in FIG. At the top position, the liquid is discharged through the portion between the external teeth of the idler 3e. By performing such operations continuously, suction and discharge of the liquid (water glass stock solution) is performed.
【００３５】駆動モータ３ｇには回転数検出器３ｈが設
けられており、その信号は濃度調整のために用いられ
る。The drive motor 3g is provided with a rotation speed detector 3h, and its signal is used for density adjustment.
【００３６】定量ポンプ３の回転数に応じた水ガラス原
液の吸引吐出量に対応して、吐出圧力がスプール弁５Ｂ
の下端面に作用するので、その吐出圧力に応じてスプー
ル弁５Ｂは、図９の（ａ）図に示す状態から（ｂ）図に
示すように、付勢バネ５Ｃに抗して上方に移動する。し
たがって、定量ポンプ３によって吐出された水ガラス原
液は、Ｔ字管４の内面との間を通って水ガラス水溶液出
口４Ｃに向かう。このとき、水が水入口４Ａから導入す
るので、水ガラス水溶液出口４Ｃ部分において、水ガラ
ス原液と水とが合流混合され、水ガラス水溶液としてプ
ランジャーポンプ６Ａに吸引される。The discharge pressure corresponds to the suction and discharge amount of the water glass stock solution according to the number of revolutions of the metering pump 3, and the discharge pressure is adjusted to the spool valve 5B.
9B, the spool valve 5B moves upward from the state shown in FIG. 9A against the biasing spring 5C according to its discharge pressure. To do. Therefore, the undiluted water glass solution discharged by the metering pump 3 passes between the inner surface of the T-tube 4 and the water glass aqueous solution outlet 4C. At this time, since water is introduced from the water inlet 4A, the water glass stock solution and water are merged and mixed at the water glass aqueous solution outlet 4C portion, and the water glass aqueous solution is sucked into the plunger pump 6A.
【００３７】この後、水ガラス水溶液はプランジャーポ
ンプ６Ａの吐出によって注入管９に送液されて、ここで
炭酸水と合流して地盤に注入される。After that, the aqueous solution of water glass is delivered to the injection pipe 9 by the discharge of the plunger pump 6A, where it joins the carbonated water and is injected into the ground.
【００３８】水ガラス水溶液の比重を測定する際には、
水ガラス水溶液導入弁７ａを僅かに開放して水ガラス水
溶液を比重測定手段７に導入する。When measuring the specific gravity of the water glass aqueous solution,
The water glass aqueous solution introducing valve 7a is slightly opened to introduce the water glass aqueous solution into the specific gravity measuring means 7.
【００３９】本発明に係る比重測定手段７は、図１０に
示すように、実質的に鉛直状態で配置された水ガラス水
溶液の貯留管７ｂと、この貯留管７ｂの上端を密閉する
キャップ７ｃと、貯留管７ｂの高さ方向中間に分岐して
連通し、かつ中間部が前記分岐部よりも高位の部分７ｄ
を有し末端が前記高位部分７ｄより下方に位置して排出
口７ｅが形成された液面調整用ドレン管７ｆと、貯留管
７ｂ内に遊びをもって内装された比重浮標７ｇと、貯留
管７ｂの下端に接続され水ガラス水溶液の導入側が水ガ
ラス水溶液の排出側よりも高位となるように段差ｙが設
けられた三方管７ｈと、この三方管７ｈの水ガラス水溶
液排出側に配設された水ガラス水溶液排出弁７ｉとを備
え、前記比重浮標７ｇは貯留管７ｂ内に導入され、前記
高位部分７ｄの高さ方向位置に対応して決められる前記
主剤水溶液の液面に対して自立しながら浮く関係にあ
る。特に、この態様においては、比重浮標７ｇの下端に
は重りｗが内装され、比重を読み取る目盛りｓは比重浮
標７ｇを水に浮かべた時に液面と重なる部位を規準すな
わち１として付されたものである。As shown in FIG. 10, the specific gravity measuring means 7 according to the present invention comprises a water glass aqueous solution storage pipe 7b arranged substantially vertically and a cap 7c for sealing the upper end of the storage pipe 7b. , A portion 7d in which the storage pipe 7b branches in the middle in the height direction and communicates with each other, and the middle portion is higher than the branch portion.
A drain pipe 7f having a discharge port 7e at an end located below the high-order portion 7d, a specific gravity buoy 7g provided with play in the storage pipe 7b, and a storage pipe 7b. A three-way tube 7h connected to the lower end and provided with a step y such that the introduction side of the aqueous water glass solution is higher than the discharge side of the aqueous water glass solution, and water disposed on the water glass aqueous solution discharge side of the three-way tube 7h. A glass aqueous solution discharge valve 7i is provided, and the specific gravity buoy 7g is introduced into the storage pipe 7b and floats while being self-supporting with respect to the liquid surface of the aqueous solution of the main agent that is determined corresponding to the height direction position of the high portion 7d. In a relationship. In particular, in this aspect, a weight w is installed at the lower end of the specific gravity buoy 7g, and the scale s for reading the specific gravity is given as a standard, that is, 1 as a part overlapping with the liquid surface when the specific gravity buoy 7g is floated on water. is there.
【００４０】また、貯留管７ｂは、比重浮標７ｇに付さ
れた目盛りｓを読み取れるように、透明な材料、たとえ
ばアクリル樹脂管とされる。比重浮標７ｇの目盛りｓ
は、浮標の内面・外面を問わない。The storage tube 7b is made of a transparent material such as an acrylic resin tube so that the scale s provided on the specific gravity buoy 7g can be read. Gravity buoy 7g scale s
Can be on the inside or outside of the buoy.
【００４１】この比重測定手段において比重を測定する
際には、まず前述のように水ガラス水溶液導入弁７ａを
開放し、貯留管７ｂ内への水ガラス水溶液の導入を開始
する。これによって、貯留管７ｂ内の水ガラス水溶液の
液面は上昇していくとともに、液面調整用ドレン管７ｆ
にも順次水ガラス水溶液が導入される。この貯留管７ｂ
および液面調整用ドレン管７ｆの液面は高さを同じくし
て上昇し、液面調整用ドレン管７ｆ内の水ガラス水溶液
が高位部分７ｄを通して排出口７ｅから排出されるよう
になると、液面の上昇は停止する。よって、排出口７ｅ
からの水ガラス水溶液の排出を目安にして水ガラス水溶
液導入弁７ａを閉じることにより、定液面を得ることが
できる。When measuring the specific gravity with this specific gravity measuring means, first, the water glass aqueous solution introducing valve 7a is opened as described above, and the introduction of the water glass aqueous solution into the storage pipe 7b is started. As a result, the liquid level of the water glass aqueous solution in the storage pipe 7b rises, and the liquid level adjusting drain pipe 7f
Also, a water glass aqueous solution is sequentially introduced. This storage pipe 7b
The liquid level of the liquid level adjusting drain pipe 7f rises at the same height, and when the water glass aqueous solution in the liquid level adjusting drain pipe 7f is discharged from the discharge port 7e through the high-order portion 7d, the liquid level increases. The ascent of the surface stops. Therefore, the outlet 7e
A constant liquid surface can be obtained by closing the water glass aqueous solution introduction valve 7a by using the discharge of the water glass aqueous solution as a guide.
【００４２】このようにして定液面が形成された後に、
液面が静止するのを待って比重浮標７ｇの目盛りｓのう
ち液面と重なる目盛りを読むことにより水ガラス水溶液
の比重を測定する。After the constant liquid surface is thus formed,
The specific gravity of the aqueous solution of water glass is measured by reading the scale overlapping with the liquid surface out of the scale s of the specific gravity buoy 7 g after waiting for the liquid surface to stand still.
【００４３】測定が終了したら、水ガラス水溶液排出弁
７ｉを開けることによって、貯留管７ｂ、液面調整用ド
レン管７ｄ、および水ガラス水溶液導入弁７ａから三方
管７ｈに至る管路に貯留されていた水ガラス水溶液が排
出される。水ガラス水溶液導入弁７ａより下流側の管路
および比重測定手段７内部に測定済の水ガラス水溶液が
残留していると、次の比重測定に影響を及ぼすため、上
述の三方管７ｈ内では、水ガラス水溶液導入側および水
ガラス水溶液排出側の管路に段差ｙを付けることにより
測定済液の排出が確実となる。この他、貯留管７ｂは鉛
直方向に固定したまま水ガラス水溶液導入弁７ａより下
流側の管路を下方に傾斜させてもよい。When the measurement is completed, the water glass aqueous solution discharge valve 7i is opened to store the water in the storage pipe 7b, the liquid level adjusting drain pipe 7d, and the pipe extending from the water glass aqueous solution introduction valve 7a to the three-way pipe 7h. The discharged water glass solution is discharged. If the measured water glass aqueous solution remains in the pipe downstream of the water glass aqueous solution introduction valve 7a and inside the specific gravity measuring means 7, it will affect the next specific gravity measurement. By providing the step y on the conduits on the water glass aqueous solution introducing side and the water glass aqueous solution discharging side, the measured liquid can be reliably discharged. Alternatively, the storage pipe 7b may be fixed in the vertical direction, and a pipe downstream of the water glass aqueous solution introduction valve 7a may be inclined downward.
【００４４】この比重測定手段では、調製後の水ガラス
水溶液が炭酸水と合流接触される前に、その一部を任意
に採取して比重測定を行うことができるため、以後、水
ガラス水溶液の調製および供給をバッチレスに行う場合
に好適である。In this specific gravity measuring means, before the prepared water glass aqueous solution is brought into contact with the carbonated water, a part thereof can be arbitrarily sampled and the specific gravity can be measured. It is suitable when the preparation and supply are performed batchlessly.
【００４５】また、前述のように、比重測定手段７によ
って測定された水ガラス水溶液の比重は、所定の比重目
標値と比較され、偏差が生じている場合には、この偏差
を無くすべく前述の定量ポンプ３の回転数を調節するこ
とにより水ガラス水溶液の濃度を調節する。As described above, the specific gravity of the aqueous solution of water glass measured by the specific gravity measuring means 7 is compared with a predetermined specific gravity target value, and if a deviation has occurred, the deviation is eliminated to eliminate the deviation. The concentration of the aqueous solution of water glass is adjusted by adjusting the rotation speed of the metering pump 3.
【００４６】[0046]
【発明の効果】以上の説明から明らかなように、本発明
によれば、グラウト液の調製および供給をバッチレスに
行う２液硬化性グラウトの注入工法においても、グラウ
ト液の比重測定が可能となる。またかかる注入工法に最
適な地盤改良用グラウト液の比重測定装置となる。As is apparent from the above description, according to the present invention, the specific gravity of the grout liquid can be measured even in the two-liquid curable grout injection method in which the grout liquid is prepared and supplied in a batchless manner. . In addition, it becomes an apparatus for measuring the specific gravity of the ground improvement grout liquid that is optimal for such an injection method.
【図１】本発明に係るグラウト液の比重測定方法の説明
図である。FIG. 1 is an explanatory diagram of a method for measuring a specific gravity of a grout liquid according to the present invention.
【図２】その合流混合方法の、第１の具体化例の説明図
である。FIG. 2 is an explanatory diagram of a first embodiment of the combined mixing method.
【図３】その第２の具体化例の説明図である。FIG. 3 is an explanatory diagram of the second embodiment.
【図４】その応用例の説明図である。FIG. 4 is an explanatory diagram of an application example thereof.
【図５】グラウト注入設備全体の実施例のフローシート
である。FIG. 5 is a flow sheet of an example of the entire grouting equipment.
【図６】定量ポンプおよびＴ字管の側面図である。FIG. 6 is a side view of a metering pump and a T-tube.
【図７】定量ポンプおよびＴ字管の縦断面図である。FIG. 7 is a longitudinal sectional view of a metering pump and a T-tube.
【図８】付勢弁の斜視図である。FIG. 8 is a perspective view of a biasing valve.
【図９】付勢弁の動作態様の縦断面図である。FIG. 9 is a vertical cross-sectional view of an operation mode of the biasing valve.
【図１０】本発明に係る比重測定手段を示す概略図であ
る。FIG. 10 is a schematic diagram showing specific gravity measuring means according to the present invention.
１，２…仮貯留タンク、３…定量ポンプ、４…Ｔ字管、
５…付勢弁、６，６Ａ，６Ｂ…プランジャーポンプ、７
…比重測定手段、８Ａ，８Ｂ…注入ホース、９…注入
管、１０…ＣＯ2 ボンベ、１１…濃度調整機、１２…合
流弁装置。1,2 ... temporary storage tank, 3 ... metering pump, 4 ... T-tube,
5 ... biasing valve, 6, 6A, 6B ... plunger pump, 7
... specific gravity measuring means, 8A, 8B ... injection hose, 9 ... injection pipe, 10 ... CO 2 cylinder, 11 ... concentration adjuster, 12 ... merging valve device.
Claims (2)
において合流混合して地盤改良用グラウト液とするもの
であって、 前記グラウト液の供給路の途中に、開閉弁を介して比重
測定手段を接続し、測定時において前記開閉弁を開け
て、前記グラウト液の一部を比重測定手段に導入して比
重を測定することを特徴とする２液硬化性グラウトの注
入工法。An X-liquid and a Y-liquid are mixed and mixed at a predetermined mixing ratio in a confluent mixing portion to obtain a ground improvement grout liquid. A method for injecting a two-component curable grout, wherein a specific gravity measuring means is connected, the on-off valve is opened at the time of measurement, and a part of the grout liquid is introduced into the specific gravity measuring means to measure the specific gravity.
閉弁を介して連通して設けられた実質的に鉛直状態で配
置された貯留管と、 この貯留管の高さ方向中間に分岐して連通し、かつ中間
部が前記分岐部よりも高位の部分を有し末端が前記高位
部分より下方に位置して排出口が形成された液面調整用
ドレン管と、 前記貯留管内に遊びをもって内装された比重浮標とを備
え、 前記比重浮標は、貯留管内に導入され、前記高位部分の
高さ方向位置に対応して決められる前記グラウト液の液
面に対して自立しながら浮く関係にあることを特徴とす
る地盤改良用グラウト液の比重測定装置。2. A storage pipe which is provided in a substantially vertical state and is provided in the middle of a ground improvement grout liquid supply path via an on-off valve, and branches off in the middle of the storage pipe in the height direction. And a middle portion having a higher portion than the branch portion and a lower end positioned below the higher portion and having a discharge port formed with a discharge port; and a play in the storage tube. And a specific gravity buoy, which is installed in the storage pipe, and has a relation of floating while standing independently with respect to the liquid level of the grout liquid determined according to the height direction position of the high portion. An apparatus for measuring a specific gravity of a grout liquid for ground improvement, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15508896A JPH101936A (en) | 1996-06-17 | 1996-06-17 | Injection method of two liquid curable grout and specific gravity measuring device of soil improvement grout liquid employed for the same device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15508896A JPH101936A (en) | 1996-06-17 | 1996-06-17 | Injection method of two liquid curable grout and specific gravity measuring device of soil improvement grout liquid employed for the same device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH101936A true JPH101936A (en) | 1998-01-06 |
Family
ID=15598393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15508896A Pending JPH101936A (en) | 1996-06-17 | 1996-06-17 | Injection method of two liquid curable grout and specific gravity measuring device of soil improvement grout liquid employed for the same device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH101936A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2299702B (en) * | 1995-03-31 | 1997-04-02 | Solatrim Ltd | Improved additive and electrode for an accumulator |
| JP2008057114A (en) * | 2006-08-29 | 2008-03-13 | Kfc Ltd | Injection device |
-
1996
- 1996-06-17 JP JP15508896A patent/JPH101936A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2299702B (en) * | 1995-03-31 | 1997-04-02 | Solatrim Ltd | Improved additive and electrode for an accumulator |
| JP2008057114A (en) * | 2006-08-29 | 2008-03-13 | Kfc Ltd | Injection device |
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