JPH0354294A - Grout for soil stabilization and grouting technique - Google Patents
Grout for soil stabilization and grouting techniqueInfo
- Publication number
- JPH0354294A JPH0354294A JP18890589A JP18890589A JPH0354294A JP H0354294 A JPH0354294 A JP H0354294A JP 18890589 A JP18890589 A JP 18890589A JP 18890589 A JP18890589 A JP 18890589A JP H0354294 A JPH0354294 A JP H0354294A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- water glass
- solution
- glass
- gelation time
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 25
- 239000011440 grout Substances 0.000 title abstract 4
- 239000002689 soil Substances 0.000 title abstract 3
- 230000006641 stabilisation Effects 0.000 title abstract 3
- 238000011105 stabilization Methods 0.000 title abstract 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000002347 injection Methods 0.000 claims abstract description 44
- 239000007924 injection Substances 0.000 claims abstract description 44
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 28
- -1 alkaline earth metal salt Chemical class 0.000 claims abstract description 11
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 52
- 239000000126 substance Substances 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 34
- 239000003349 gelling agent Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 8
- 229940079593 drug Drugs 0.000 claims description 7
- 238000001879 gelation Methods 0.000 abstract description 43
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract description 26
- 235000017557 sodium bicarbonate Nutrition 0.000 abstract description 13
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract description 13
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 abstract description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract description 7
- 239000001110 calcium chloride Substances 0.000 abstract description 7
- 229910001628 calcium chloride Inorganic materials 0.000 abstract description 7
- 229910052943 magnesium sulfate Inorganic materials 0.000 abstract description 4
- 235000019341 magnesium sulphate Nutrition 0.000 abstract description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 2
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 238000005086 pumping Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 16
- 239000012190 activator Substances 0.000 description 11
- 238000002156 mixing Methods 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 10
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 239000002075 main ingredient Substances 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012456 homogeneous solution Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (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止水や強化を目的として行う地盤注
入工法に用いる薬液であって、主材の水ガラスとして該
水ガラス自体がゲル化能力を有した活性化された水ガラ
スを用いるＮ？＆およびその注入工法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a chemical liquid used in a ground injection method for the purpose of water stopping and strengthening of soft ground, and the water glass itself is a gelatinized liquid as the main material. N? using activated water glass with the ability to & related to its injection method.
（従来技術およびそれらの問題点）
一般に水ガラス系薬液の注入工法における最も特徴とす
るところは、注入薬液に化学的な性質、すなわち注入薬
液そのものにゲル化能力を与え、しかも所望のゲル化時
間を確実に保持した状態で該薬液を地盤中に注入するこ
とである。このような注入薬液を調製して、地盤に注入
する方法には、次の２弐があり、その主流は後者の二液
式である。(Prior art and their problems) In general, the most distinctive feature of water glass-based chemical injection methods is that the chemical properties of the injected chemical, that is, the gelling ability of the injected chemical itself, and the desired gelling time. The chemical solution is injected into the ground while ensuring that the chemical is maintained. There are two methods for preparing such injection chemicals and injecting them into the ground, of which the latter two-component method is the mainstream.
一液式（１ショット式）二調合槽内で水ガラス、ゲル化
剤および水を所定のゲル化時間〈一般には１０分以上）
になるように調合した後、１台の注入ボンブを用いて地
盤中に注入する方法。One-component type (one-shot type) Water glass, gelling agent, and water are mixed in a two-component mixing tank for a predetermined gelling time (generally 10 minutes or more).
A method of injecting the mixture into the ground using a single injection bomb after mixing it to the desired level.
二液式：水ガラス溶液（Ａ液）とゲル化剤溶液（Ｂ液）
を別々の槽で調合して、Ａ液とＢｉとを別々の注入ポン
プで圧送し、注入管の手前（１．５ショット式〉、ある
いはＡ液とＢ液とを注入管の先端〈２ショット式）で合
流させて混合液を地盤中に注入する方法。Two-component type: water glass solution (liquid A) and gelling agent solution (liquid B)
are mixed in separate tanks, and liquid A and Bi are pumped using separate injection pumps. A method of injecting the mixed liquid into the ground by merging it with the formula (formula).
ところで、実際の注入現場において、薬液のゲル化時間
に関して要求される条件は、次の通りである。Incidentally, in an actual injection site, the conditions required regarding the gelation time of the drug solution are as follows.
（ａ） 地上の調合プラントでの薬液調合において、
ゲル化時間の調整が容易であること（一液式、二液式と
も）。(a) In compounding chemical solutions in above-ground compounding plants,
It is easy to adjust the gelation time (for both one-part and two-part systems).
（ｂ） Ａ液とＢ液とを注入ポンプで合流させても、
ゲル化時間が変らないこと（二液式において）。(b) Even if liquid A and liquid B are combined using an injection pump,
The gelation time should not change (in a two-component system).
ｆｃ） 地盤中に注入された薬液が、地下水で希釈さ
れてもゲル化時間の変動が少ないこと。fc) Even if the chemical solution injected into the ground is diluted with groundwater, there should be little variation in gelation time.
上記のうち、一般には（ａｌが重視されるが、特に二液
式においては、注入ボンブの混合誤差に起因する（′ｂ
）の調整が大切である。しかも、（ａ）は地上操作であ
るから管理は容易であるが、（ｂ）はポンプ性能（流量
精度）から現場的に調整が難しい。即ち、二液注入ボン
ブの許容誤差は５％（保証値）もあると云われているう
えに、実際の現場では高圧下で長時間運転したり、腐食
性薬液を送液したりするので、これらの原因によって流
Ｎ誤差を５％以内に留めるのは難しいとされている。し
たがって、二液式の場合は２台の注入ボンブを併用する
ため、Ａ液とＢ液との混合誤差（流量誤差一吐出量誤差
）は±５％、即ち最大で１０％の誤差が生じることにな
り、ゲル化時間の変動の大きな要因である。Of the above, in general (al is important, but in particular in two-liquid type, it is due to mixing error of the injection bomb ('b)
) is important. Moreover, since (a) is a ground operation, it is easy to manage, but (b) is difficult to adjust on-site due to pump performance (flow rate accuracy). In other words, it is said that the tolerance for two-component injection bombs is as much as 5% (guaranteed value), and in actual work, they are operated under high pressure for long periods of time, and corrosive chemicals are pumped. Due to these causes, it is considered difficult to keep the flow N error within 5%. Therefore, in the case of a two-liquid type, since two injection bombs are used together, the mixing error between liquids A and B (flow rate error - discharge amount error) is ±5%, or a maximum error of 10%. This is a major factor in the variation in gelation time.
また、（Ｃｌは、地盤に注入された薬液が必らずといっ
て良いほどに地下水によるダメージを受けるわけである
から、ゲル化時間の保持と共に、仮にゲル化時間が遅延
しても固結能力を有するかどうかは、薬液として重要な
性質である。In addition, (Cl), since chemical solutions injected into the ground are almost always damaged by groundwater, it is important to maintain the gelation time, and even if the gelation time is delayed, it will not solidify. Whether or not it has the ability is an important property for a medicinal solution.
このような水ガラス系薬液の問題点を解決するため、従
来から種々のゲル化剤によるゲル化時間を調整する方法
が実用化されている。即ち、従来の基本的な考え方は、
主剤である水ガラス溶液の組成や性状はそのまま不変と
して、ゲル化時間などのゲル化能力の調整は専らそれぞ
れのゲル化剤の種類とその組合せに頼っていた。しかし
ながら、実際には普通の水ガラスにどのようなゲル化剤
を組合せても、特に緩結タイプの薬液においては、ゲル
化能力に前述のような欠陥があり、水ガラス系薬液の施
工信頼性について致命的な問題となっていた。In order to solve these problems with water glass-based chemical solutions, methods of adjusting the gelation time using various gelling agents have been put into practical use. In other words, the conventional basic idea is that
The composition and properties of the water glass solution, which is the main ingredient, remained unchanged, and the adjustment of gelling ability such as gelling time depended solely on the types of gelling agents and their combinations. However, in reality, no matter what kind of gelling agent is combined with ordinary water glass, especially slow-setting type chemicals, the gelling ability has the above-mentioned defects, and the construction reliability of water glass-based chemicals is affected. This was a fatal problem.
（問題を解決するための手段）
本発明者等は、主剤として水ガラスそのものに特定した
活性剤を添加してゲル化能力を付与せしめて活性化した
均一な水ガラス溶液（以下、本発明においては活性水ガ
ラスと称し、９通水ガラスと区別する）を用いることに
より、所望のゲル化時間が容易に調整できる薬液の体系
を開発し、本発明を完或するに至った。即ち、本発明は
、アルカリ土類金属塩を溶存させたゲル化能力を有する
水ガラス溶液（活性水ガラス）に、ゲル化剤を添加して
、ゲル化時間が調整された上質安定用注入薬液を提供す
る。(Means for Solving the Problem) The present inventors have developed a homogeneous water glass solution (hereinafter referred to in the present invention) which is activated by adding a specified activator to water glass itself as a main ingredient to impart gelling ability. The present invention was completed by developing a chemical solution system in which the desired gelation time can be easily adjusted by using activated water glass (which is called activated water glass to distinguish it from 9-pass water glass). That is, the present invention provides a high-quality stable injection drug solution in which a gelling time is adjusted by adding a gelling agent to a water glass solution having a gelling ability (activated water glass) in which an alkaline earth metal salt is dissolved. I will provide a.
本発明に用いる活性水ガラスは、昔通の水ガラスにアル
カリ土類金属塩を添加し激しく混合して溶存させること
により、珪酸塩のゲルを発生することなく得られる均一
な水ガラス溶液である。このよ・うな活性水ガラスは、
それ自体がゲル化能力を有するに充分なアルカリ土類金
属塩の添加量であればよく、該添加量が多少変動しても
安定したゲル化時間を得ることができ、一般に数１０時
間以内、特に１〜７時間でゲル化することができる。The activated water glass used in the present invention is a homogeneous water glass solution obtained by adding an alkaline earth metal salt to traditional water glass and stirring vigorously to dissolve it, without generating a silicate gel. . This kind of activated water glass is
It is sufficient that the amount of alkaline earth metal salt added is sufficient to have gelation ability itself, and even if the amount added changes somewhat, a stable gelation time can be obtained, and generally within several tens of hours. In particular, it can be gelled in 1 to 7 hours.
普通の水ガラス（以下、非活性水ガラスともいう）とし
ては、市販の珪酸アルカリ水溶液であり、従来から薬液
注入工法において用いられている水ガラス系薬液の主成
分であり、一般に比重１．３〜１．４程度、モル比２〜
４程度のものが好ましく、必要に応して水で薄めて用い
ることもできる。また、アルカリ土類金属塩を含有する
水溶液としては、例えば塩化カルシウム、硫酸マグネシ
ウム、塩化マグネシウムなどの可溶性塩を溶解した水溶
液である。このようなアルカリ土類金属塩を含有する水
溶液としては、海水がそのまま用いられるほか、海水と
地下水とが混じった水など、水ガラスと通常の混合によ
りゲル化作用を呈するアルカリ上類金属塩を含有する水
溶液であればよい。Ordinary water glass (hereinafter also referred to as inactive water glass) is a commercially available aqueous alkali silicate solution, which is the main component of water glass-based chemicals conventionally used in chemical injection methods, and generally has a specific gravity of 1.3. ~1.4 or so, molar ratio 2~
4 or so is preferable, and it can be diluted with water if necessary. Examples of aqueous solutions containing alkaline earth metal salts include aqueous solutions in which soluble salts such as calcium chloride, magnesium sulfate, and magnesium chloride are dissolved. As an aqueous solution containing an alkaline earth metal salt, seawater can be used as it is, or a mixture of seawater and groundwater can be used, as well as an alkali metal salt that exhibits a gelling effect when mixed with water glass. Any aqueous solution may be used as long as it contains.
本発明は、上記した活性水ガラスを主剤とし、これにゲ
ル化剤を添加して、任意のゲル化時間に調整することを
特徴とした薬液である。このゲル化剤としては、従来の
水ガラス系注入薬液において用いられている公知のゲル
化剤が特に制限なく使用でき、例えば重炭酸ナトリウム
（重曹）などの重炭酸塩、硫酸、リン酸などの鉱酸、重
硫酸塩などの酸性塩、酢酸などの有機酸、グリオキザー
ル、アルキレンカーボネート、セメント、塩化ナトリウ
ム、塩化カリウムなどのアルカリ金属塩化物、硫酸ナト
リウム、硫酸カリウムなどの硫酸塩、炭酸ナトリウム、
炭酸カリウムなどの炭酸塩などの挙げられる。The present invention is a chemical solution characterized by using the above-mentioned activated water glass as a main ingredient and adding a gelling agent thereto to adjust the gelation time to an arbitrary value. As this gelling agent, known gelling agents used in conventional water glass-based injection medicines can be used without particular restrictions, such as bicarbonates such as sodium bicarbonate (baking soda), sulfuric acid, phosphoric acid, etc. Mineral acids, acid salts such as bisulfate, organic acids such as acetic acid, glyoxal, alkylene carbonate, cement, alkali metal chlorides such as sodium chloride, potassium chloride, sulfates such as sodium sulfate, potassium sulfate, sodium carbonate,
Examples include carbonates such as potassium carbonate.
本発明の薬液によれば、前記した如き実際の注入現場に
おいて要求される条件（ａ−ｃ）を満足させることがで
きる。即ち、
（ａ） それ自体がゲル化能力を有し且つ安定なゲル
化時間を有する活性水ガラスにゲル化剤を添加するため
、ゲル化時間の調整が極めて容易になる。According to the chemical solution of the present invention, the conditions (ac) required at the actual injection site as described above can be satisfied. That is, (a) Since a gelling agent is added to activated water glass which itself has a gelling ability and a stable gelling time, it becomes extremely easy to adjust the gelling time.
（ｂ） 二液式注入において、活性水ガラス（Ａ液）
とゲル化剤（Ｂ液）とを注入ボンブで合流、混合させる
場合、両液の混合比（流量比）に誤差が生じても、ゲル
化時間の変動巾が小さい。(b) In two-component injection, activated water glass (liquid A)
When the gelling agent (Liquid B) is combined and mixed with an injection bomb, even if an error occurs in the mixing ratio (flow rate ratio) of both liquids, the range of variation in gelation time is small.
（Ｃ） 地盤中に注入された活性水ガラスとゲル化剤
からなる薬液は、地下水などで希釈されても、ゲル化時
間が遅延され難く、またゲル化時間が遅延しても固結力
の低下が極めて小さい。(C) Even if a chemical solution consisting of activated water glass and a gelling agent injected into the ground is diluted with groundwater, the gelation time is unlikely to be delayed, and even if the gelation time is delayed, the consolidation force will be significantly reduced. The decrease is extremely small.
このように本発明の活性水ガラスを主材とした薬液は、
従来の？通水ガラスを主材とした薬液に比べて現場施工
性を大巾に改善することができる。In this way, the chemical solution based on activated water glass of the present invention is
Traditional? Compared to chemical solutions that use water-permeable glass as the main material, on-site workability can be greatly improved.
すなわち、本発明は主材の水ガラス自体がゲル化能力を
有している活性水ガラスであるから、それ自体にはゲル
化能力がない従来の昔通水ガラスを主材とした薬液に比
べて、ゲル化時間の調整が容易であり、また薬液として
固結性、水希釈性などの性質も向上できるのは充分に理
解できるところである。In other words, since the main material of the present invention is activated water glass, which itself has the ability to gel, it is more effective than the conventional chemical solution that was made mainly from water-permeable glass, which itself did not have the ability to gel. Therefore, it is well understood that the gelation time can be easily adjusted, and properties such as solidification and water dilutability as a drug solution can also be improved.
本発明の薬液を地盤に注入する工法は、特に制限される
ものでないが、次の二つの工法が好ましく挙げられる。The method of injecting the chemical solution of the present invention into the ground is not particularly limited, but the following two methods are preferred.
１） 一液式による工法
本発明の薬液は、ゲル化時間、特に緩結（ゲル化時間ｌ
Ｏ分以上）の調整が容易になったので、一液式の注入方
法に最適である。注入方法としては、調整槽内に活性水
ガラス、ゲル化剤及び水を入れて所定のゲル化時間にな
るように＃Ａ！！Ｌて、１台の注入ポンプを用いて地盤
中に注入するもので、特にストレーナ注入やスリーブ注
入工法に代表される工法である。1) One-component construction method The chemical solution of the present invention has a gelation time, particularly slow setting (gelation time l).
Since it is easy to adjust the amount (more than 0 minutes), it is ideal for a one-component injection method. The injection method is to put activated water glass, gelling agent, and water into the adjustment tank and pour #A! so that the predetermined gelation time is reached. ! L, a single injection pump is used to inject into the ground, and this method is particularly typified by strainer injection and sleeve injection methods.
２） 二液式による工法
本発明の薬液は、瞬結（２０秒以下）から緩結（１分以
上）まで巾広く利用できるようになり、特に緩結領域に
おいても安定したゲル化時間が得られるようになった。2) Two-component construction method The chemical solution of the present invention can now be used in a wide range of settings, from instant setting (20 seconds or less) to slow setting (1 minute or more), and can provide a stable gelation time even in the slow setting region. Now you can.
注入方法としては、活性水ガラス溶液（Ａ液）とゲル化
剤（Ｂ液）とを別々の調合槽で造って、２台の注入ボン
ブを用いて、ＡおよびＢの両液を等量、あるいは比例で
合流（混合）させて薬液を地盤中に注入する。この場合
、ＡおよびＢの両液を合流する場所は特に限定されない
が、注入管の手前、あるいは注入管（二重管）の先端で
合流される。また、Ａ液の注入ボンブのサクション側で
Ｂ液を合流させることもできる。この二液弐による注入
方法は、単管ロンド注入（緩結薬液）、二重管ロノド注
入（ｖＡ結、及び瞬結と緩結を組み合せた複合注入工法
）、さらにストレーナー注入工法、スリーブ注入工法に
も利用できるのは勿論である。The injection method is to prepare the activated water glass solution (liquid A) and the gelling agent (liquid B) in separate mixing tanks, and then use two injection bombs to mix equal amounts of both liquids A and B. Alternatively, the chemical solution is injected into the ground by merging (mixing) in proportion. In this case, the location where both liquids A and B are combined is not particularly limited, but they are combined in front of the injection tube or at the tip of the injection tube (double tube). Moreover, it is also possible to combine the B liquid on the suction side of the A liquid injection bomb. This two-component injection method includes single-tube Rondo injection (loose-setting chemical solution), double-tube Rondo injection (VA-tie, and a composite injection method that combines instant-tie and loose-tie), strainer injection method, and sleeve injection method. Of course, it can also be used for
（実施例）
以下、本発明について、実施例および比較例をあげて説
明する。なお用いた普通水ガラスは、モル比３．４およ
び比重１．３２であり、活性剤としては塩化カルシウム
（ＣａＣＪ１２ Ｈ ｚ Ｏ ） 、及び硫酸マグネシ
ウム（Ｍｇ Ｓ Ｏ ４・７１’｛ｚＯ）、またゲル化
剤としては重曹（ＮａＨＣ○３）およびエチレンカーボ
ネー｝ （ＥＣ）である。また、薬液の調製における液
温は、いずれの場合も１６〜１８℃に維持した．
実施例１、２および比較例１、１
９通水ガラスの原？＆（１００％）１ｊ２および水希釈
した水ガラス（５０％）１１に、それぞれ活性剤として
塩化カルシウムの所定量を溶解した水溶液１ｌを添加し
、珪酸塩ゲルが発生しないように激しく混合して、均一
な溶液である活性水ガラス（以下、隘１およびぬ２と称
する）を得た。また、水希釈した水ガラス（６６．７％
）１ｌに、活性剤として硫酸マグネシウムの所定量を溶
解した水溶液１ｊ２を添加し、同様に珪酸塩ゲルを発生
しないように激しく混合して、均一な溶液である活性水
ガラス（以下、弘３とする）を得た，これらぬ１〜ｌＩ
ｋＬ３の活性水ガラスについて、用いた活性剤の所定量
を変えて、得られる活性水ガラス中における活性剤の濃
度変化に対するゲル化時間を測定した結果を第１図に示
した。第ｌ図から、活性剤の少量添加により水ガラスが
活性化され、また活性剤の添加量が多少変動しても安定
した数時間のゲル化時間を有する溶液が得られるため、
現場における薬液の製造が非常に容易になることが理解
できる。(Examples) Hereinafter, the present invention will be explained by giving Examples and Comparative Examples. The ordinary water glass used had a molar ratio of 3.4 and a specific gravity of 1.32, and the activators were calcium chloride (CaCJ12HzO) and magnesium sulfate (MgSO4.71'{zO), and The gelling agent is sodium bicarbonate (NaHC○3) and ethylene carbonate (EC). In addition, the liquid temperature during the preparation of the drug solution was maintained at 16 to 18°C in all cases. Examples 1 and 2 and Comparative Examples 1 and 1 9 Water-permeable glass material? & (100%) 1j2 and water glass diluted with water (50%) 11, add 1 liter of an aqueous solution in which a predetermined amount of calcium chloride as an activator is dissolved, and mix vigorously to prevent silicate gel from forming. Activated water glass (hereinafter referred to as No. 1 and No. 2) as a homogeneous solution was obtained. In addition, water glass diluted with water (66.7%
), add an aqueous solution 1j2 in which a predetermined amount of magnesium sulfate as an activator is dissolved, and similarly mix vigorously so as not to generate a silicate gel to obtain a homogeneous solution of activated water glass (hereinafter referred to as Hiroshi 3). ) obtained these 1~lI
For the activated water glass of kL3, the predetermined amount of the activator used was changed and the gelation time was measured with respect to the change in the concentration of the activator in the obtained activated water glass. The results are shown in FIG. From Figure 1, water glass is activated by adding a small amount of activator, and a solution with a stable gelation time of several hours can be obtained even if the amount of activator added varies slightly.
It can be seen that manufacturing of chemical solutions on-site becomes extremely easy.
次に、上記したＮｌｌｌの塩化カルシウムｌ重量％を溶
存させた５０％の活性水ガラスを用いて、これにゲル化
剤としてＥＣおよび重曹の水溶液をそれぞれ薬液（以下
、実施例１および実施例２とする）を得た。これら実施
例１および実施例２の薬液について、該薬液中（１ ０
０ ０ ｌ）におけるゲル化剤の濃度（ｇ）に対する
ゲル化時間の変化を測定した結果を第２図した。なお、
比較のために、活性剤を添加しない昔通水ガラス（非活
性水ガラス）の５０％液を用いて、これに上記と同様に
ゲル化剤としてＥＣと重曹の水溶液を添加して、そのゲ
ル化剤の濃度に対して得られた薬液（それぞれ比較例１
および比較例２とする）のゲル化時間を測定し、第２図
に示した。第２図から、実施例１および実施例２では、
ゲル化剤によるゲル化時間の調整が極めて容易であり、
またゲル化剤が極端に少量、あるいは全くなくてもゲル
化する特性が認められる．これに対して、比較例１では
、ゲル化剤の量が少量変化するとゲル化時間は大きく変
動し、ついには全くゲル化しなくなる。また、比較例２
では、最もゲル化時間の調整が容易とされる重曹のゲル
化剤でも、ゲル化時間が１０分以上になるとゲル化時間
の整調が難しくなり、添加量が不足すると全くゲル化し
なくなる。Next, using 50% activated water glass in which 1% by weight of calcium chloride of Nllll as described above was dissolved, aqueous solutions of EC and sodium bicarbonate as gelling agents were respectively added as chemical solutions (hereinafter referred to as Example 1 and Example 2). ) was obtained. Regarding the chemical solutions of Examples 1 and 2, (1 0
Figure 2 shows the results of measuring the change in gelation time with respect to the gelling agent concentration (g) at 0 0 l). In addition,
For comparison, we used a 50% solution of old water-permeable glass (non-activated water glass) to which no activator was added, and added an aqueous solution of EC and baking soda as gelling agents to it in the same way as above to create a gel. The chemical solution obtained for the concentration of the chemical agent (Comparative Example 1)
and Comparative Example 2) were measured and shown in FIG. From FIG. 2, in Example 1 and Example 2,
It is extremely easy to adjust the gelation time using a gelling agent.
Moreover, it has the property of gelling even with an extremely small amount of gelling agent or no gelling agent at all. On the other hand, in Comparative Example 1, when the amount of the gelling agent changes by a small amount, the gelation time changes greatly, and eventually no gelation occurs at all. Also, comparative example 2
Even with the gelling agent of baking soda, which is said to have the easiest gelling time to adjust, if the gelling time exceeds 10 minutes, it becomes difficult to adjust the gelling time, and if the amount added is insufficient, gelling will not occur at all.
実施例３、４および比較例３、４
前実施例において、活性剤として塩化カルシウムの１重
量％を溶存させて得た濃度５０％の活性水ガラス（Ａ液
）、ゲル化剤（Ｂ液）として４．２重量％の重曹水溶液
および１．７重量％のＥＣ水溶液を用いて、調合誤差に
ゲル化時間の安定性を実験的に確認した。即ち、第３図
に示すように、それぞれＡ液とＢ液との混合容量比を互
に変化させて混合し、その調合された薬液のゲル化時間
を測定した。それらの結果を第３図に示す。第３図にお
いてＢ液として重曹を用いた場合を実施例３、同じ＜Ｅ
Ｃを用いた場合を実施例４とする。Examples 3 and 4 and Comparative Examples 3 and 4 In the previous example, activated water glass with a concentration of 50% obtained by dissolving 1% by weight of calcium chloride as an activator (liquid A), gelling agent (liquid B) Using a 4.2% by weight aqueous sodium bicarbonate solution and a 1.7% by weight EC aqueous solution, the stability of gelation time due to formulation errors was experimentally confirmed. That is, as shown in FIG. 3, liquids A and B were mixed at varying mixing volume ratios, and the gelation time of the prepared chemical liquids was measured. The results are shown in FIG. In Figure 3, Example 3 shows the case where baking soda is used as liquid B, and the same <E
Example 4 is a case where C is used.
また、比較のために、上記の活性水ガラスの代りに濃度
５０％の昔通水ガラス（非活性水ガラス）をＡ液とし、
ゲル化剤（Ｂ液〉として６重量％の重曹水溶液、２．３
重景％のＥＣ水溶液を用いて、同じく第３図に示すよう
にＡ液とＢ液との混合重量比を互に変化させて混合し、
その調合させた薬液のゲル化時間を測定した。それらの
結果も第３図に示す。なお、Ｂ液として重曹を用いた場
合を比較例３、同し＜ＥＣを用いた場合を比較例４とす
る。Also, for comparison, instead of the above activated water glass, old water passing glass (non-activated water glass) with a concentration of 50% was used as liquid A.
Gelling agent (liquid B): 6% by weight aqueous sodium bicarbonate solution, 2.3
Using an EC aqueous solution with a concentration of 1%, as shown in FIG.
The gelation time of the prepared drug solution was measured. The results are also shown in FIG. In addition, Comparative Example 3 is a case in which sodium bicarbonate is used as liquid B, and Comparative Example 4 is a case in which the same <EC is used.
第３図から、本発明の活性水ガラスを用いた場合には、
Ａ液とＢ液との混合量比が多少変動しても、ゲル化時間
が殆んど変らない特性が認められるため、実際の二液式
注入工法においても１０分以上の長いゲル化時間を安定
して使用できることが分る。これに対して、昔通水ガラ
ス（非活性水ガラス）を用いた場合には、Ａｔ＆とＢ液
との混合量比が少し変動してもゲル化時間が大きく変化
するため、実際の二液式注入工法において欠点となる。From FIG. 3, when the activated water glass of the present invention is used,
Even if the mixing ratio of liquids A and B changes slightly, the gelation time is almost unchanged, so even in the actual two-component injection method, the gelation time can be as long as 10 minutes or more. It turns out that it can be used stably. On the other hand, when water-permeable glass (non-activated water glass) was used in the past, even if the mixing ratio of At& and B liquid changed slightly, the gelation time changed greatly. This is a drawback in the type injection method.
実施例５および比較例５、６
前実施例と同様に塩化カルシウムの１重量％を溶存させ
た濃度５０％の活性水ガラスに塩化カリウム添加してゲ
ル化時間（Ｔｏ）を１０分に調整した薬液と、比較のた
めに濃度５０％の昔通水ガラスにゲル化剤の重曹および
ＥＣをそれぞれ添加してゲル化時間（Ｔ０）を１０分に
調整した薬液を調製した。これらを調製後、直ちに水で
希釈した場合における薬液のゲル化時間（Ｔ）について
、遅延度合（Ｔ／Ｔｏ）を測定した結果を第４図に示す
。Example 5 and Comparative Examples 5 and 6 As in the previous example, potassium chloride was added to activated water glass with a concentration of 50% in which 1% by weight of calcium chloride was dissolved, and the gelation time (To) was adjusted to 10 minutes. For comparison, a chemical solution was prepared by adding baking soda and EC as gelling agents to a 50% concentration old water-passing glass and adjusting the gelation time (T0) to 10 minutes. FIG. 4 shows the results of measuring the degree of retardation (T/To) regarding the gelation time (T) of the chemical solutions when they were diluted with water immediately after their preparation.
なお、昔通水ガラスにゲル化剤の重曹を用いた場合を比
較例５、ＥＣを用いた場合を比較例６とする。In addition, Comparative Example 5 is a case in which baking soda as a gelling agent is used for water-permeable glass, and Comparative Example 6 is a case in which EC is used.
第４図から、本発明の活性水ガラスを用いた薬？Ｆｉ．
（実施例５）の方が、昔通水ガラスを用い薬液（比較
例５、６）より、水に希釈されてもゲル化時間が遅延さ
れ難く、特に多量の水に希釈されてもゲル化能力を有し
ていることが認められる。From FIG. 4, it can be seen that the medicine using the activated water glass of the present invention? Fi.
(Example 5) is more difficult to delay the gelation time even when diluted with water than the chemical solution (Comparative Examples 5 and 6) using a water-permeable glass, and in particular gelation occurs even when diluted with a large amount of water. It is recognized that the person has the ability.
第１図は、本発明の実施例における活性水ガラスの活性
剤濃度に対ずるゲル化時間を示す。第２図は、本発明の
実施例および比較例における薬液のゲル化剤濃度に対す
るゲル化時間を示す。第３図は、本発明の実施例および
比較例におけるＡ液とＢ液との混合比に対する薬液のゲ
ル化時間を示す。第４図は本発明の実施例および比較例
における薬液の水希釈におけるゲル化時間の遅延度合を
示す。
第
１
図
第
２
図
■ぷ刷燻組ツー・に）FIG. 1 shows gelation time versus activator concentration of activated water glass in an example of the present invention. FIG. 2 shows the gelation time versus the gelling agent concentration of the chemical solution in Examples and Comparative Examples of the present invention. FIG. 3 shows gelation times of chemical solutions with respect to mixing ratios of solutions A and B in Examples and Comparative Examples of the present invention. FIG. 4 shows the degree of delay in gelation time when diluting chemical solutions with water in Examples and Comparative Examples of the present invention. Figure 1 Figure 2
Claims (1)
する水ガラス溶液に、ゲル化剤を添加してゲル化時間が
調整された上質安定用注入薬液（２）特許請求の範囲第
（１）項に記載の薬液を１台の注入ポンプを用いて地盤
中に注入することを特徴とする注入工法 （３）特許請求の範囲第（１）項に記載の水ガラス溶液
をＡ液とし、ゲル化剤を含有する溶液をＢ液とし、Ａ液
とＢ液とを別々に圧送し、注入管の手前あるいは注入管
の先端部で合流して得られる薬液を土盤中に注入するこ
とを特徴とする注入工法[Claims] (1) A high-quality stable injection drug solution (2) in which a gelling agent is added to a water glass solution having a gelling ability in which an alkaline earth metal salt is dissolved to adjust the gelling time. (3) An injection method characterized by injecting the chemical solution described in claim (1) into the ground using one injection pump. (3) Water according to claim (1) The glass solution is called liquid A, and the solution containing the gelling agent is called liquid B. Liquids A and B are pumped separately, and the resulting chemical solution is mixed in front of the injection tube or at the tip of the injection tube. An injection method characterized by injection into the board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188905A JP2801272B2 (en) | 1989-07-24 | 1989-07-24 | Work stabilization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188905A JP2801272B2 (en) | 1989-07-24 | 1989-07-24 | Work stabilization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0354294A true JPH0354294A (en) | 1991-03-08 |
| JP2801272B2 JP2801272B2 (en) | 1998-09-21 |
Family
ID=16231937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1188905A Expired - Fee Related JP2801272B2 (en) | 1989-07-24 | 1989-07-24 | Work stabilization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2801272B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04293995A (en) * | 1991-03-25 | 1992-10-19 | Raito Kogyo Co Ltd | Soil conditioner |
| JP6159963B1 (en) * | 2016-10-31 | 2017-07-12 | 強化土株式会社 | Ground injection material and ground improvement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140311A (en) * | 1975-05-29 | 1976-12-03 | Mitsui Toatsu Chemicals | Soil treatment agent |
| JPS52113505A (en) * | 1976-03-19 | 1977-09-22 | Asahi Denka Kogyo Kk | Chemical liquid for impregnating subsoil |
| JPS56155288A (en) * | 1980-05-01 | 1981-12-01 | Ikeda Takeshi | Curing agent for water glass-based soil stabilizer |
| JPS5731983A (en) * | 1980-08-05 | 1982-02-20 | Toagosei Chem Ind Co Ltd | Liquid chemical for stabilizing ground |
| JPS57174381A (en) * | 1981-04-22 | 1982-10-27 | Mitsui Toatsu Chem Inc | Stabilization of ground |
-
1989
- 1989-07-24 JP JP1188905A patent/JP2801272B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140311A (en) * | 1975-05-29 | 1976-12-03 | Mitsui Toatsu Chemicals | Soil treatment agent |
| JPS52113505A (en) * | 1976-03-19 | 1977-09-22 | Asahi Denka Kogyo Kk | Chemical liquid for impregnating subsoil |
| JPS56155288A (en) * | 1980-05-01 | 1981-12-01 | Ikeda Takeshi | Curing agent for water glass-based soil stabilizer |
| JPS5731983A (en) * | 1980-08-05 | 1982-02-20 | Toagosei Chem Ind Co Ltd | Liquid chemical for stabilizing ground |
| JPS57174381A (en) * | 1981-04-22 | 1982-10-27 | Mitsui Toatsu Chem Inc | Stabilization of ground |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04293995A (en) * | 1991-03-25 | 1992-10-19 | Raito Kogyo Co Ltd | Soil conditioner |
| JP6159963B1 (en) * | 2016-10-31 | 2017-07-12 | 強化土株式会社 | Ground injection material and ground improvement method |
| JP2018070803A (en) * | 2016-10-31 | 2018-05-10 | 強化土株式会社 | Soil injection material and soil improvement method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2801272B2 (en) | 1998-09-21 |
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