JPH0471956B2 - - Google Patents
Info
- Publication number
- JPH0471956B2 JPH0471956B2 JP59281478A JP28147884A JPH0471956B2 JP H0471956 B2 JPH0471956 B2 JP H0471956B2 JP 59281478 A JP59281478 A JP 59281478A JP 28147884 A JP28147884 A JP 28147884A JP H0471956 B2 JPH0471956 B2 JP H0471956B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- water glass
- injection
- ground
- reactant
- 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
Links
- 238000002347 injection Methods 0.000 claims description 42
- 239000007924 injection Substances 0.000 claims description 42
- 235000019353 potassium silicate Nutrition 0.000 claims description 37
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 37
- 239000011440 grout Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 150000003839 salts Chemical class 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000000376 reactant Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 238000001879 gelation Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000499 gel Substances 0.000 description 4
- 239000011833 salt mixture Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- -1 alkali metal salt Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052914 metal silicate Inorganic materials 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006053 organic reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- XHFLOLLMZOTPSM-UHFFFAOYSA-M sodium;hydrogen carbonate;hydrate Chemical compound [OH-].[Na+].OC(O)=O XHFLOLLMZOTPSM-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
〔発明の属する技術分野〕
本発明は無機反応剤を用いたPHがアルカリを呈
する水ガラスを用いた地盤注入工法に関する。
〔従来技術とその問題点〕
従来、地盤を固結するために水ガラスに反応剤
を加えて地盤に注入する方法が用いられてきた
が、水ガラスはPHが弱アルカリ付近、即ち、PH８
〜９付近でゲル化時間が最も短かくなるためこれ
を中和するに充分な反応剤を加えることができな
かつた。
したがつて、グラウト中には未反応水ガラスを
残存することになり、これを地盤中に注入した場
合、強度低下を来し、あるいは地下水中に水ガラ
スを溶脱することにもなつた。特に無機反応剤を
用いた水ガラスグラウトでは反応剤過少による前
述の現象が著しく、このため、水ガラスと反応剤
を注入管内で合流して短いゲル化時間で注入せざ
るを得ず、従つて脈状の浸透固結しか期待できな
かつた。
また、水溶性多価金属塩を反応剤とする水ガラ
スグラウトが知られている。この水溶性多価金属
塩は水ガラスと直ちに反応するため、浸透効果は
期待できなかつた。さらに、エステルやグリオキ
ザール等の有機反応剤を用いた水ガラスグラウト
も知られている。これは反応がゆるやかなため、
長いゲル化時間と高強度を得ることができるが、
有機反応生成物によるBOD，CODの問題を生じ
る。
〔本発明の目的〕
本発明の目的は無機反応剤を用いた水ガラスグ
ラウトの上記欠点を改良せしめるところにあり、
水ガラスに対して充分な量の無機塩反応剤を作用
せしめて、注入される水ガラス分を完全にゲルと
して析出させ、これにより強度低下を防止すると
ともに地下水中への未反応水ガラスの溶脱をも防
止し得る地盤注入工法を提供することにある。
〔発明の要点〕
前述の目的を達成するため、本発明によれば、
水溶性多価金属塩を含有する一次注入材をあらか
じめ注入対象地盤に浸透させておいてから、無機
反応剤を用いたPHがアルカリ性を呈する水ガラス
グラウトの注入材を地盤中に注入することを特徴
とする。
〔発明の具体的説明〕
以下、本発明を具体的に詳述する。
本発明ではまず、CaCl2，MgCl2，Al2（SO4）3
等の水溶性多価金属塩の一次注入材をあらかじめ
注入対象地盤に浸透させておく。次いでこの注入
対象地盤に無機反応剤を用いたPHがアルカリ性を
呈する水ガラスグラウトの注入材を注入する。こ
の水ガラスグラウトはPHがアルカリ領域にあり、
ゲル化はするものの、水ガラス量に対して中和さ
せるには不充分な量の反応剤しか含有していない
ものである。しかし、反応剤が過少であるが故に
浸透に充分なゲル化時間が保持されている。この
ような水ガラスグラウトを前述のようにあらかじ
め水溶性多価金属塩配合液の注入されている地盤
に注入すると、水ガラスグラウトは注入量に相当
する範囲に浸透するとともに浸透後徐々にあらか
じめ土粒子中に存在する水溶性多価金属塩配合液
の注入材と反応し、未反応部分を残存することな
く完全に固化され、かつ強度の劣化も起こさな
い。
本発明における水ガラスグラウトの無機反応剤
とは無機酸、塩（無機塩、塩基性塩、中性塩、酸
性塩等）、石灰、セメント、スラグ等、任意のも
のを用いる事が出来る。
水ガラスとしてはモル比（SiO2／M2Ｏ）：1.5
〜5.0液状水ガラス、無水水ガラス、和水水ガラ
ス、結晶性水ガラス等を含めた任意のモル比の珪
酸のアルカリ金属塩、或は珪酸のアルカリ金属塩
と珪酸或は任意のアルカリとの混合物をいう。
又、上記水ガラスグラウトは水ガラスと反応剤
の混合水溶液或は水ガラス水溶液と反応剤水溶液
を合流混合したものであつてそれ自体ゲル化し
え、そのPH値はアルカリ領域（８よりも高いPH
値）のものである。
以下、本発明を実験によりさらに具体的に詳述
する。
実験方法
直径２ｍ、高さ３ｍの大型モールド中に山砂を
填充して水道水で飽和させ比較実験を行つた。
１ 注入方式
１−１ ロツド注入
１−２ 二重管ロツド注入（図−１）
１−３ 二重管ダブルパツカー注入（図−２）
２ 一次注入材
２−１ Al2（SO4）3 20％配合液
２−２ CaCl2 20％配合液
２−３ NaHCO3 20％配合液
２−４ セメントグラウト（100c.c.当り）
ポルトランドセメント120ｇ
水：残り
２−５ 水ガラス−セメントグラウト
（３−１と同じ）
３ 二次注入材（100c.c.当り配合）
３−１
Ａ液
（50c.c.）３号水ガラス
水 25c.c.
25c.c.
Ｂ液
（50c.c.）ポルトランドセメント
水 20ｇ
残り
Ａ・Ｂ合流液のゲル化時間１分。PH11.8。
３−２
Ａ液
（50c.c.）３号水ガラス
水 25c.c.
25c.c.
Ｂ液
（50c.c.）重炭酸ナトリウム
水 ３ｇ
残り
Ａ・Ｂ合流液のゲル化時間 ３分。
PH 11.2。
３−３
Ａ液
（50c.c.）３号水ガラス
水 25c.c.
25c.c.
Ｂ液
（50c.c.）硫酸水素ナトリウム
水 ３ｇ
残り
Ａ・Ｂ合流液のゲル化時間 ３分。
PH 11.0。
４ 注入量
一次注入、二次注入とも注入ステージを0.5ｍ
間隔で下から上に移動して、１ステージ当り50
づつ注入した。
比較のため二次注入材のみの場合には１ステー
ジ当りの注入量を100とした。
実験結果 １
一次注入の有無に関する強度試験の実験結果を
表−１に示す。
これより一次注入を行なわない場合は、強度が
大巾に低下するが、一次注入を行つた場合は強度
が大巾に増大していく事が判る。
[Technical field to which the invention pertains] The present invention relates to a ground injection method using water glass with an alkaline pH using an inorganic reactant. [Prior art and its problems] Conventionally, in order to solidify the ground, a method has been used in which a reactive agent is added to water glass and injected into the ground.
Since the gelation time becomes the shortest at around 9.9 to 9.0, it was not possible to add enough reactant to neutralize the gelation time. Therefore, unreacted water glass remains in the grout, and when this is injected into the ground, the strength decreases or the water glass is leached into the ground water. In particular, in water glass grout using an inorganic reactant, the above-mentioned phenomenon due to insufficient reactant is noticeable, and for this reason, the water glass and reactant must be combined in the injection pipe and injected in a short gelation time. All that could be expected was vein-like infiltration and consolidation. Furthermore, water glass grout using a water-soluble polyvalent metal salt as a reactant is known. Since this water-soluble polyvalent metal salt immediately reacts with water glass, no penetration effect could be expected. Furthermore, water glass grouts using organic reactants such as esters and glyoxal are also known. This is because the reaction is slow,
Although long gelation time and high strength can be obtained,
This causes BOD and COD problems due to organic reaction products. [Object of the present invention] The object of the present invention is to improve the above-mentioned drawbacks of water glass grout using an inorganic reactant.
A sufficient amount of inorganic salt reactant is applied to the water glass to completely precipitate the injected water glass as a gel, thereby preventing strength loss and leaching of unreacted water glass into groundwater. The purpose of the present invention is to provide a ground injection method that can also prevent this. [Summary of the Invention] In order to achieve the above-mentioned object, according to the present invention,
The primary injection material containing a water-soluble polyvalent metal salt is infiltrated into the ground to be injected in advance, and then the water glass grout injection material, which uses an inorganic reactant and has an alkaline pH, is injected into the ground. Features. [Specific Description of the Invention] The present invention will be specifically described in detail below. In the present invention, first, CaCl 2 , MgCl 2 , Al 2 (SO 4 ) 3
A primary injection material of a water-soluble polyvalent metal salt such as the following is infiltrated into the ground to be injected in advance. Next, a water glass grout with an alkaline pH using an inorganic reactant is injected into the ground to be injected. This water glass grout has a pH in the alkaline range,
Although it gels, it contains only an insufficient amount of reactant to neutralize the amount of water glass. However, because there is too little reactant, sufficient gelation time for penetration is maintained. When such water glass grout is injected into the ground where the water-soluble polyvalent metal salt mixture has been injected in advance as described above, the water glass grout permeates into the area corresponding to the amount of injection, and after infiltrating, it gradually spreads into the soil in advance. It reacts with the injection material of the water-soluble polyvalent metal salt mixture present in the particles, and is completely solidified without leaving any unreacted parts, and does not cause any deterioration in strength. As the inorganic reactant for water glass grout in the present invention, any one can be used, such as inorganic acids, salts (inorganic salts, basic salts, neutral salts, acid salts, etc.), lime, cement, slag, etc. As water glass, molar ratio (SiO 2 /M 2 O): 1.5
~5.0 An alkali metal salt of silicic acid in any molar ratio including liquid water glass, anhydrous water glass, hydrous water glass, crystalline water glass, etc., or a combination of an alkali metal salt of silicic acid and silicic acid or any alkali. A mixture. In addition, the above-mentioned water glass grout is a mixed aqueous solution of water glass and a reactant, or a mixture of a water glass aqueous solution and a reactant aqueous solution, and can gel itself, and its PH value is in the alkaline region (pH higher than 8).
value). Hereinafter, the present invention will be explained in more detail through experiments. Experimental method A comparative experiment was conducted by filling a large mold with a diameter of 2 m and a height of 3 m with mountain sand and saturating it with tap water. 1 Injection method 1-1 Rod injection 1-2 Double pipe rod injection (Fig. 1) 1-3 Double pipe double packer injection (Fig. 2) 2 Primary injection material 2-1 Al 2 (SO 4 ) 3 20% Mixed liquid 2-2 CaCl 2 20% mixed liquid 2-3 NaHCO 3 20% mixed liquid 2-4 Cement grout (per 100 c.c.) Portland cement 120 g
Water: remaining 2-5 water glass-cement grout
(Same as 3-1) 3 Secondary injection material (mixed per 100 c.c.) 3-1 Liquid A (50 c.c.) No. 3 water glass water 25 c.c. 25 c.c. Liquid B (50 c.c. .) Portland cement water 20g Gelation time of remaining A and B combined solution 1 minute. PH11.8. 3-2 Solution A (50c.c.) No. 3 glass water 25c.c. 25c.c. Solution B (50c.c.) Sodium bicarbonate water 3g Gelation time of remaining A and B combined solution 3 minutes. PH 11.2. 3-3 Solution A (50c.c.) No. 3 glass water 25c.c. 25c.c. Solution B (50c.c.) Sodium hydrogen sulfate water 3g Gelation time of remaining A and B combined solution 3 minutes. PH 11.0. 4 Injection volume: Set the injection stage to 0.5m for both primary and secondary injections.
Moving from bottom to top at intervals, 50 per stage
Injected one by one. For comparison, in the case of only secondary injection material, the injection amount per stage was set to 100. Experimental Results 1 Table 1 shows the experimental results of strength tests with and without primary injection. It can be seen from this that when primary injection is not performed, the strength decreases significantly, but when primary injection is performed, the strength increases significantly.
【表】
又固結体1000cm3を採取し、10中の蒸溜水中に
28日養生してのち養生水中のSiO2の養生量を測
定した結果を表−１に示す。これより強度低下は
SiO2の溶出によるものである事が判り、水溶性
多価金属塩を一次注入した場合、SiO2の溶出量
は大幅に低下し、かつ強度が増大することがわか
る。これに対し、水溶性多価金属塩を一次注入し
ない場合には強度が大幅に低下し、SiO2の溶脱
が極めて大きいことがわかる。
実験結果 ２
注入方式による比較を行つた結果を表−２に示
す。[Table] Also, collect 1000cm3 of the solidified material and add it to distilled water of 10.
Table 1 shows the results of measuring the amount of SiO 2 in the curing water after 28 days of curing. The strength decreases from this
It was found that this was due to the elution of SiO 2 , and that when a water-soluble polyvalent metal salt was primarily injected, the amount of SiO 2 eluted was significantly reduced and the strength was increased. On the other hand, it can be seen that when the water-soluble polyvalent metal salt is not primarily injected, the strength decreases significantly and the leaching of SiO 2 is extremely large. Experimental Results 2 Table 2 shows the results of a comparison of injection methods.
【表】
表−２よりロツド注入を用いた場合、注入ステ
ージ毎に確実に一次注入材を浸透させる事がむず
かしいから、効果が比較的少ないのにくらべ、二
重管（三重管でもよい）注入を用いて一次注入を
所定のステージ毎に先行して注入してから二次注
入を行つた場合、きわめてすぐれた効果を発揮す
る事が判る。
実験結果 ３
一次注入材の種類に関する実験結果を表−３に
示す。表−３より一次注入材としては特に多価金
属塩がすぐれている事が判る。これは不溶性の多
価金属の珪酸塩が形成されるためと思われる。[Table] Table 2 shows that when using rod injection, it is difficult to ensure that the primary injection material penetrates at each injection stage, so the effect is relatively low. It can be seen that when the primary injection is performed in advance at each predetermined stage using the secondary injection method, and the secondary injection is performed, an extremely excellent effect can be obtained. Experimental Results 3 Table 3 shows the experimental results regarding the types of primary injection materials. Table 3 shows that polyvalent metal salts are especially excellent as primary injection materials. This is thought to be due to the formation of insoluble polyvalent metal silicate.
【表】
又実験−１と同じようにして行つたSiO2の溶
出試験の結果も多価金属塩を一次注入材として用
いた場合SiO2溶出量が少ない事を示した。
これに対して、NaHCO3のような一価の金属
塩、あるいはセメントのような非水溶性の反応剤
を一次注入したのでは、無機反応剤を用いた水ガ
ラスグラウトを二次注入材として用いても、強度
が大幅に低下し、かつSiO2の溶脱量が極めて大
きい。
実験結果 ４
一次注入としてセメントグラウトや水ガラス−
セメントグラウトを用いた場合と水溶性多価金属
塩配合液を用いた場合の比較を行ない、結果を表
−４に示す。[Table] The results of the SiO 2 elution test conducted in the same manner as in Experiment 1 also showed that the amount of SiO 2 eluted was small when polyvalent metal salt was used as the primary injection material. On the other hand, if a monovalent metal salt such as NaHCO 3 or a water-insoluble reactant such as cement is used as the primary injection material, water glass grout using an inorganic reactant may be used as the secondary injection material. However, the strength is significantly reduced and the amount of SiO 2 leached is extremely large. Experimental results 4 Cement grout and water glass as primary injection
A comparison was made between the use of cement grout and the use of a water-soluble polyvalent metal salt mixture, and the results are shown in Table 4.
以上のとおり、本発明は水溶性多価金属塩配合
液をあらかじめ注入対象地盤に浸透させておいて
から、無機反応剤を用いたPHがアルカリ性を呈す
る水ガラスグラウトを注入するようにしたから、
水ガラスグラウトの浸透性を保持し、かつ水ガラ
スに対して充分な量の無機塩反応剤を地盤中で作
用して水ガラス分を完全にゲルとして析出せし
め、この結果、高強度と経済的強度増加を可能に
し地下水中への水ガラスの溶脱をも防止し得る。
As described above, in the present invention, a water-soluble polyvalent metal salt mixture is infiltrated into the ground to be injected in advance, and then a water glass grout with an alkaline pH using an inorganic reactant is injected.
The permeability of the water glass grout is maintained, and a sufficient amount of inorganic salt reactant acts on the water glass in the ground to completely precipitate the water glass as a gel, resulting in high strength and economical properties. It can increase strength and also prevent water glass from leaching into underground water.
第１図および第２図はいずれも本発明工法を実
施するための注入管の一具体例を示し、第２図
ａ，ｂは本発明工法の工程図を示す。
１……注入孔、３……吐出口、５……注入管、
９……外管、１０……内管、１１……上部吐出
口、１２……下部吐出口。
1 and 2 both show a specific example of an injection pipe for carrying out the construction method of the present invention, and FIGS. 2a and 2b show process diagrams of the construction method of the present invention. 1...Injection hole, 3...Discharge port, 5...Injection pipe,
9...Outer pipe, 10...Inner pipe, 11...Upper outlet, 12...Lower outlet.
Claims (1)
らかじめ注入対象地盤に浸透させておいてから、
無機反応剤を用いたPHがアルカリ性を呈する水ガ
ラスグラウトの二次注入材を地盤中に注入するこ
とを特徴とする複数の注入材を用いて地盤を固結
する地盤注入工法。1. After the primary injection material containing water-soluble polyvalent metal salt is infiltrated into the ground to be poured,
A ground injection method that consolidates the ground using multiple injection materials, which is characterized by injecting into the ground a secondary injection material of water glass grout that uses an inorganic reactive agent and has an alkaline pH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28147884A JPS61159484A (en) | 1984-12-31 | 1984-12-31 | Grouting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28147884A JPS61159484A (en) | 1984-12-31 | 1984-12-31 | Grouting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61159484A JPS61159484A (en) | 1986-07-19 |
| JPH0471956B2 true JPH0471956B2 (en) | 1992-11-17 |
Family
ID=17639737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28147884A Granted JPS61159484A (en) | 1984-12-31 | 1984-12-31 | Grouting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61159484A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62172088A (en) * | 1986-01-24 | 1987-07-29 | Kyokado Eng Co Ltd | Ground grouting process |
| KR100415809B1 (en) * | 2001-09-17 | 2004-01-24 | 이순호 | precast pile for braced wall and the method using the same |
| JP4621634B2 (en) * | 2006-06-29 | 2011-01-26 | 国立大学法人北海道大学 | Method of consolidation of ground containing calcium using microorganisms |
| NL2010818C2 (en) * | 2013-05-17 | 2014-11-24 | Univ Delft Tech | Bio-based repair method for concrete. |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52113505A (en) * | 1976-03-19 | 1977-09-22 | Asahi Denka Kogyo Kk | Chemical liquid for impregnating subsoil |
| JPS5966484A (en) * | 1982-10-07 | 1984-04-14 | Kyokado Eng Co Ltd | Grouting method |
| JPS59152986A (en) * | 1983-02-21 | 1984-08-31 | Kyokado Eng Co Ltd | Impregnation method for ground |
-
1984
- 1984-12-31 JP JP28147884A patent/JPS61159484A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52113505A (en) * | 1976-03-19 | 1977-09-22 | Asahi Denka Kogyo Kk | Chemical liquid for impregnating subsoil |
| JPS5966484A (en) * | 1982-10-07 | 1984-04-14 | Kyokado Eng Co Ltd | Grouting method |
| JPS59152986A (en) * | 1983-02-21 | 1984-08-31 | Kyokado Eng Co Ltd | Impregnation method for ground |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61159484A (en) | 1986-07-19 |
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| LAPS | Cancellation because of no payment of annual fees |