JPH0236154B2 - JIBANCHUNYUZAIOYOBIJIBANNOANTEIKAHOHO - Google Patents
JIBANCHUNYUZAIOYOBIJIBANNOANTEIKAHOHOInfo
- Publication number
- JPH0236154B2 JPH0236154B2 JP22811382A JP22811382A JPH0236154B2 JP H0236154 B2 JPH0236154 B2 JP H0236154B2 JP 22811382 A JP22811382 A JP 22811382A JP 22811382 A JP22811382 A JP 22811382A JP H0236154 B2 JPH0236154 B2 JP H0236154B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- sodium silicate
- aqueous solution
- acidic
- acidic liquid
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 30
- 239000007924 injection Substances 0.000 claims description 30
- 239000004115 Sodium Silicate Substances 0.000 claims description 23
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 23
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 23
- 230000002378 acidificating effect Effects 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 description 14
- 239000000499 gel Substances 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- 235000010755 mineral Nutrition 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 235000011126 aluminium potassium sulphate Nutrition 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well 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
本発明は地盤注入剤及び地盤の安定化方法に関
する。
従来、軟弱地盤を強化したり、湧水地盤を止水
するために種々の薬液（地盤注入剤）を地盤に注
入し、地盤中でゲル化させる薬液注入工法が知ら
れている。薬液注入工法の１つとして浸透注入工
法がある。この工法は、ゲルタイムが数分〜数十
分の地盤注入剤を地盤に注入し、土壌粒子の間隙
に地盤注入剤を十分浸透させたのちゲル化させる
施工法である。しかしながら、この浸透注入工法
には、ゲルタイムが数分以上の地盤注入剤を地盤
に注入するために、土質条件によつては地盤注入
剤が未だゲル化しないうちに施工箇所以外の地盤
中に流出して施工を不確実なものにしたり、地盤
注入剤が地下水や井戸水に流入して公害問題を生
ずる恐れがあるという欠点がある。このような浸
透注入工法の有する欠点を解消した施工法として
近年瞬結工法が開発された。この工法は、地盤に
注入した地盤注入剤を地盤中において数秒ないし
十数秒という短時間でゲル化させる施工法であ
る。瞬結工法用に開発されている地盤注入剤とし
ては、例えば主剤である珪酸ソーダ水溶液と硬化
剤である鉱酸水溶液もしくは酸性鉱酸塩水溶液等
の酸性液とを有効成分として含有する地盤注入剤
が知られている。しかしながら、斯かる公知の地
盤注入剤を使用して瞬結工法により地盤の安定化
を行なつた場合、安定化処理された土壌の強度が
不充分であり、処理土壌を堀削する場合に該土壌
が崩壊する恐れがあるという欠点がある。このよ
うな欠点を解消するために上記地盤注入剤にクレ
イ、珪藻土、炭酸カルシウム、石膏等の骨材を添
加した組成物を使用して土壌を安定化することも
試みられているが、安定化処理された土壌の強度
は尚不充分である。
本発明者は斯かる現状に鑑み、瞬結工法に適合
した所望の地盤注入剤を開発すべく鋭意研究を重
ねた結果、遂に本発明を完成するに至つた。
即ち本発明は、珪酸ソーダ水溶液及び酸性液を
主成分として含む地盤注入剤において、該主成分
に加えて非晶形二酸化珪素を含有させたことを特
徴とする地盤注入剤、並びに珪酸ソーダ水溶液及
び酸性液を別々に地盤に注入し、地盤中にてこれ
らを接触、ゲル化させるグラウト工法において、
前記珪酸ソーダ水溶液及び／又は酸性液に非晶形
二酸化珪素を添加することを特徴とする地盤の安
定化方法に係る。
本発明の地盤注入剤を使用すれば、処理土壌の
強度を従来の地盤注入剤で処理された土壌のそれ
に比し大幅に向上し得る。
本発明組成物を構成する一成分は珪酸ソーダ水
溶液である。珪酸ソーダとしては、従来公知のも
のを広く使用でき、例えばJIS Ｋ―1408に規定さ
れている１号、２号、３号等を挙げることができ
る。本発明では珪酸ソーダは水溶液の形態で使用
される。珪酸ソーダ水溶液中の珪酸ソーダの濃度
としては特に限定されず広い範囲内から適宜選択
できるが、通常25〜75％（Ｖ／Ｖ）、好ましくは
40〜60％とするのがよい。珪酸ソーダの濃度が低
過ぎると、硬化剤との反応によつても寒天状のゲ
ルしか得られず、安定化処理によつても強度が充
分向上された土壌が得難くなるという傾向が生ず
る。また珪酸ソーダの濃度が高過ぎると、珪酸ソ
ーダ水溶液の粘度が高くなり取扱い（土壌中への
浸透）が困難となるばかりでなく、硬化剤との混
合がうまく行なわれず、従つて得られるゲルも不
均一なものとなる傾向が生ずる。
本発明組成物を構成する他の一つの成分は酸性
液である。酸性液としては硫酸、塩酸、硝酸、燐
酸等の鉱酸水溶液又は酸性芒硝、酸性燐酸ソーダ
等の酸性鉱酸塩水溶液等の従来公知のものを広く
使用することができる。酸性液中の硬化剤成分濃
度としては鉱酸もしくは酸性鉱酸塩の種類、珪酸
ソーダ水溶液の濃度等により異なり一概には言え
ないが、本発明の地盤注入剤のゲルタイムが約10
秒以内となりかつ安定化処理された土壌に充分な
強度を賦与できる程度の濃度とするのがよい。珪
酸ソーダ水溶液と酸性液との使用割合としては特
に制限されず広い範囲内から適宜選択できるが、
通常前者に対して後者を0.5〜２倍容量、好まし
くは等容量程度用いるのがよい。
本発明組成物を構成する他の一成分は非晶形二
酸化珪素である。非晶形二酸化珪素としては、天
然、合成のどちらでもよく、比表面積50m2／ｇ以
上、粒度20μ以下の微粉状のものが好ましく、例
えばホワイトカーボンと称される合成水和珪酸を
挙げることができる。非晶形二酸化珪素の使用量
としては特に限定がなく広い範囲内で適宜選択で
きるが、通常上記珪酸ソーダ水溶液と酸性液との
合計量に対して0.5〜20％（Ｗ／Ｖ）程度、好ま
しくは1.0〜15％程度使用するのがよい。非晶形
二酸化珪素の使用量が少な過ぎると本発明の所期
の効果が発揮され難くなり、また逆に多過ぎると
地盤注入剤の粘度が急激に向上して土壌安定化処
理の際の作業性が低下するので好ましくない。
本発明の地盤注入剤にはゲル化助剤を配合する
こともできる。ゲル化助剤としてはこの分野で公
知のものを広く使用でき、例えば硫酸マグネシウ
ム、硫酸アルミニウム（硫酸バンド）、硫酸アル
ミニウムカリウム（カリ明礬）、塩化カルシウム、
塩化マグネシウムその他多価金属塩類等を挙げる
ことができる。斯かるゲル化助剤の使用量として
は、通常珪酸ソーダ水溶液と酸性液との合計量に
対して５％（Ｗ／Ｖ）以下、好ましくは0.5〜３
％（Ｗ／Ｖ）とするのがよい。ゲル化助剤の添加
により、ゲルタイムを一層短縮できると共に、安
定化処理された土壌の強度をより一層向上させる
ことができる。
本発明の地盤注入剤の使用に際しては、従来の
瞬結工法用の地盤注入剤と同様各成分それぞれに
調合すればよい。例えば、施工前に地盤安定化に
適した濃度の珪酸ソーダ水溶液と所望の酸性液と
をそれぞれ専用の槽で別々に調合し、施工時に両
者を地盤中に注入するのがよい。この際非晶形二
酸化珪素は、地盤中へ注入する前の珪酸ソーダ水
溶液及び酸性液のうちいずれか一方に又はその双
方に所定量配合しておけばよい。
本発明の地盤注入剤は、該注入剤の各調合成分
を地盤に注入し、地盤中にてこれら成分をゲル化
させればよい。地盤注入剤の地盤注入法としては
従来公知の方法を広く適用できる。例えば、その
先端（土壌注入部）に適当なロツドを装着した中
空二重管を地盤に打込み、管内に珪酸水溶液と酸
性液とをそれぞれ別々に流し、これらを先端のロ
ツドから直ちに地盤中に注入する方法を採用する
ことができる。ゲル化に要する時間は通常約10秒
以内、好ましくは２〜５秒程度である。
以下に実施例を挙げる。
実施例
JIS3号珪酸ソーダ100に水100を加えて希釈
し珪酸ソーダ水溶液とした。これをＡ液（主剤）
という。
一方、各種鉱酸及び酸性鉱酸塩〔95％硫酸、85
％リン酸及び酸性芒硝（H2SO4として39％）〕、
カリ明礬及びホワイトカーボン〔商標カープレツ
クス#67、塩野義製薬(株)製〕の下記第１表記載の
所定量に水を加え、全量を200とした。これを
Ｂ液（硬化剤）という。
Ａ液及びＢ液をそれぞれ５℃に調整後、２液を
等量の割合で混合し、50φ×50の塩化ビニル製の
モールドに移し入れ、供試体を作成した。これを
５℃にて60分間養生したのち、一軸圧縮強度を測
定した。結果を第１表に示す。
The present invention relates to a ground injection agent and a ground stabilization method. BACKGROUND ART Conventionally, chemical injection methods have been known in which various chemical solutions (ground injection agents) are injected into the ground and gelled in the ground in order to strengthen soft ground or stop spring water from flowing into the ground. One of the chemical injection methods is the penetration injection method. In this construction method, a ground injection agent with a gel time of several minutes to several tens of minutes is injected into the ground, and after the ground injection agent sufficiently penetrates into the gaps between soil particles, it is gelled. However, in this penetrating injection method, a ground injection agent with a gel time of several minutes or more is injected into the ground. However, there are drawbacks such as making the construction work uncertain, and the possibility that the ground injection agent may flow into groundwater or well water, causing pollution problems. In recent years, the instant bonding method has been developed as a construction method that eliminates the drawbacks of the penetration injection method. This construction method is a construction method in which a ground injection agent injected into the ground gels in the ground within a short period of several seconds to more than ten seconds. Ground injection agents developed for the instant bonding method include, for example, ground injection agents containing as active ingredients an aqueous sodium silicate solution as a base agent and an acidic liquid such as a mineral acid aqueous solution or an acidic mineral salt aqueous solution as a hardening agent. It has been known. However, when the ground is stabilized by the instant setting method using such known ground injection agents, the strength of the stabilized soil is insufficient, and when excavating the treated soil, it is difficult to stabilize the ground. The disadvantage is that the soil may collapse. In order to eliminate these drawbacks, attempts have been made to stabilize the soil by using a composition in which aggregates such as clay, diatomaceous earth, calcium carbonate, and gypsum are added to the above-mentioned ground injection agent. The strength of the treated soil is still insufficient. In view of the current situation, the inventor of the present invention has conducted intensive research to develop a desired ground injection agent suitable for the instant bonding method, and has finally completed the present invention. That is, the present invention provides a ground injection agent containing a sodium silicate aqueous solution and an acidic liquid as main components, which is characterized by containing amorphous silicon dioxide in addition to the main components, and a sodium silicate aqueous solution and an acidic liquid. In the grouting method, liquids are separately injected into the ground, and they come into contact with each other in the ground and gel.
The present invention relates to a method for stabilizing ground, which comprises adding amorphous silicon dioxide to the aqueous sodium silicate solution and/or acidic liquid. By using the ground injection agent of the present invention, the strength of treated soil can be significantly improved compared to that of soil treated with conventional ground injection agents. One component constituting the composition of the present invention is an aqueous sodium silicate solution. As the sodium silicate, a wide variety of conventionally known ones can be used, and examples thereof include No. 1, No. 2, and No. 3 specified in JIS K-1408. In the present invention, sodium silicate is used in the form of an aqueous solution. The concentration of sodium silicate in the sodium silicate aqueous solution is not particularly limited and can be appropriately selected from a wide range, but is usually 25 to 75% (V/V), preferably
It is best to set it at 40-60%. If the concentration of sodium silicate is too low, only an agar-like gel can be obtained by reaction with a hardening agent, and even by stabilization treatment, it tends to be difficult to obtain soil with sufficiently improved strength. Furthermore, if the concentration of sodium silicate is too high, the viscosity of the aqueous sodium silicate solution will not only become difficult to handle (penetrate into the soil), but also the mixing with the curing agent will not be carried out well, resulting in the gel being obtained. A tendency towards non-uniformity arises. Another component constituting the composition of the present invention is an acidic liquid. As the acidic liquid, a wide variety of conventionally known ones can be used, such as aqueous solutions of mineral acids such as sulfuric acid, hydrochloric acid, nitric acid, and phosphoric acid, and aqueous solutions of acidic mineral salts such as acidic sodium sulfate and acidic sodium phosphate. The concentration of the curing agent component in the acidic liquid varies depending on the type of mineral acid or acidic mineral salt, the concentration of the sodium silicate aqueous solution, etc., but it cannot be generalized, but the gel time of the ground injection agent of the present invention is about 10
It is preferable that the concentration be within seconds and at a level that can impart sufficient strength to the stabilized soil. The ratio of the sodium silicate aqueous solution and the acidic liquid to be used is not particularly limited and can be appropriately selected from a wide range.
It is usually advisable to use the latter in a volume 0.5 to 2 times that of the former, preferably about the same volume. Another component constituting the composition of the present invention is amorphous silicon dioxide. The amorphous silicon dioxide may be either natural or synthetic, and is preferably in the form of fine powder with a specific surface area of 50 m 2 /g or more and a particle size of 20 μ or less, such as synthetic hydrated silicic acid called white carbon. . The amount of amorphous silicon dioxide to be used is not particularly limited and can be appropriately selected within a wide range, but it is usually about 0.5 to 20% (W/V) based on the total amount of the above sodium silicate aqueous solution and acidic liquid, preferably about 0.5 to 20% (W/V), preferably It is best to use about 1.0 to 15%. If the amount of amorphous silicon dioxide used is too small, it will be difficult to achieve the desired effect of the present invention, and if it is too large, the viscosity of the ground injection agent will increase rapidly, resulting in poor workability during soil stabilization treatment. This is not preferable because it reduces the A gelling aid may also be added to the ground injection agent of the present invention. As gelling aids, a wide variety of gelling agents known in this field can be used, such as magnesium sulfate, aluminum sulfate (sulfate band), potassium aluminum sulfate (potash alum), calcium chloride,
Examples include magnesium chloride and other polyvalent metal salts. The amount of such gelling aid used is usually 5% (W/V) or less, preferably 0.5 to 3% (W/V) based on the total amount of the sodium silicate aqueous solution and the acidic liquid.
% (W/V). By adding the gelation aid, the gel time can be further shortened and the strength of the stabilized soil can be further improved. When using the ground injection agent of the present invention, each component may be individually mixed in the same manner as the conventional ground injection agent for instant bonding methods. For example, it is preferable to separately prepare a sodium silicate aqueous solution with a concentration suitable for ground stabilization and a desired acidic solution in dedicated tanks before construction, and then inject both into the ground during construction. At this time, a predetermined amount of amorphous silicon dioxide may be blended into either or both of the sodium silicate aqueous solution and the acidic liquid before being injected into the ground. The ground injection agent of the present invention may be prepared by injecting each of the ingredients of the injection agent into the ground and allowing these ingredients to gel in the ground. As the method for injecting the ground injection agent into the ground, conventionally known methods can be widely applied. For example, a hollow double pipe with an appropriate rod attached to its tip (soil injection part) is driven into the ground, a silicic acid aqueous solution and an acidic solution are poured into the tube separately, and these are immediately injected into the ground from the rod at the tip. A method can be adopted. The time required for gelation is usually within about 10 seconds, preferably about 2 to 5 seconds. Examples are given below. Example JIS No. 3 Sodium silicate 100% was diluted by adding 100% water to obtain a sodium silicate aqueous solution. Add this to liquid A (main ingredient)
That's what it means. On the other hand, various mineral acids and acidic mineral salts [95% sulfuric acid, 85
% phosphoric acid and acidic mirabilite (39% as H 2 SO 4 )],
Water was added to the predetermined amounts of potash alum and white carbon (trademark Carplex #67, manufactured by Shionogi & Co., Ltd.) shown in Table 1 below to make the total amount 200. This is called liquid B (curing agent). After adjusting the temperature of liquid A and liquid B to 5° C., the two liquids were mixed in equal proportions and transferred to a 50φ×50 vinyl chloride mold to prepare a specimen. After curing this at 5° C. for 60 minutes, the unconfined compressive strength was measured. The results are shown in Table 1.
【表】
尚95％硫酸11.0Kgを配合する場合において、ホ
ワイトカーボンの代りにタルク10Kgを使用した場
合及びタルク20Kgを使用した場合の一軸圧縮強度
（Kg／cm2）はそれぞれ0.71，0.85に過ぎず、いず
れの場合も非晶形二酸化珪素を使用した場合に比
してその強度は弱いものであつた。[Table] When blending 11.0 kg of 95% sulfuric acid, the unconfined compressive strength (Kg/cm 2 ) when using 10 kg of talc instead of white carbon and 20 kg of talc is only 0.71 and 0.85, respectively. First, in all cases, the strength was weaker than when amorphous silicon dioxide was used.
Claims (1)
含む地盤注入剤において、該主成分に加えて非晶
形二酸化珪素を含有させたことを特徴とする地盤
注入剤。 ２ 珪酸ソーダ水溶液及び酸性液を別々に地盤に
注入し、地盤中にてこれらを接触、ゲル化させる
グラウト工法において、前記珪酸ソーダ水溶液及
び／又は酸性液に非晶形二酸化珪素を添加するこ
とを特徴とする地盤の安定化方法。[Scope of Claims] 1. A ground injection agent containing a sodium silicate aqueous solution and an acidic liquid as main components, characterized in that it contains amorphous silicon dioxide in addition to the main components. 2. A grouting method in which a sodium silicate aqueous solution and an acidic liquid are separately injected into the ground and brought into contact and gelled in the ground, characterized in that amorphous silicon dioxide is added to the sodium silicate aqueous solution and/or the acidic liquid. Ground stabilization method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22811382A JPH0236154B2 (en) | 1982-12-28 | 1982-12-28 | JIBANCHUNYUZAIOYOBIJIBANNOANTEIKAHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22811382A JPH0236154B2 (en) | 1982-12-28 | 1982-12-28 | JIBANCHUNYUZAIOYOBIJIBANNOANTEIKAHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59122579A JPS59122579A (en) | 1984-07-16 |
| JPH0236154B2 true JPH0236154B2 (en) | 1990-08-15 |
Family
ID=16871402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22811382A Expired - Lifetime JPH0236154B2 (en) | 1982-12-28 | 1982-12-28 | JIBANCHUNYUZAIOYOBIJIBANNOANTEIKAHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0236154B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03275793A (en) * | 1990-03-26 | 1991-12-06 | Kyokado Eng Co Ltd | Non-alkaline silica sol for grouting in ground |
| WO2001058831A1 (en) * | 2000-02-08 | 2001-08-16 | Peter Warren English | A soil supplement containing plant available silicon |
| JP5369340B1 (en) * | 2013-01-16 | 2013-12-18 | 強化土株式会社 | Ground improvement method |
| JP5531234B1 (en) * | 2013-02-08 | 2014-06-25 | 強化土株式会社 | Ground injection material and ground injection method |
| JP5382561B1 (en) * | 2013-04-22 | 2014-01-08 | 強化土株式会社 | Ground improvement method |
| US10837153B2 (en) * | 2016-11-01 | 2020-11-17 | University Of Florida Research Foundation, Inc. | Bioinspired mineralization for geotechnical substructures |
-
1982
- 1982-12-28 JP JP22811382A patent/JPH0236154B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59122579A (en) | 1984-07-16 |
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