JPH03199286A - Soil-stabilizing chemical and grouting thereof - Google Patents
Soil-stabilizing chemical and grouting thereofInfo
- Publication number
- JPH03199286A JPH03199286A JP33650489A JP33650489A JPH03199286A JP H03199286 A JPH03199286 A JP H03199286A JP 33650489 A JP33650489 A JP 33650489A JP 33650489 A JP33650489 A JP 33650489A JP H03199286 A JPH03199286 A JP H03199286A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- sodium bicarbonate
- solution
- water glass
- gel 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
- 239000000126 substance Substances 0.000 title claims abstract description 30
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 59
- 239000000243 solution Substances 0.000 claims abstract description 54
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 32
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract description 26
- 239000007864 aqueous solution Substances 0.000 abstract description 11
- 230000005484 gravity Effects 0.000 abstract description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004115 Sodium Silicate Substances 0.000 abstract description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 abstract description 2
- 229910052911 sodium silicate Inorganic materials 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 21
- 238000002156 mixing Methods 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000013535 sea water Substances 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000000087 stabilizing effect Effects 0.000 description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 description 2
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011734 sodium Substances 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
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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、地盤注
入工法に用いる土質安定用架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 soil stabilizing frame used in a ground injection method and its injection method for the purpose of water stopping and strengthening of soft ground.
土質安定用薬液の硬化剤として重炭酸ソーダを用いる注
入工法では、一般に水ガラスの水溶液（Ａ液）と重炭酸
ソーダの水溶液（Ｂ液）とを、それぞれ等量で圧送して
、注入管の手前または先端部において合流させ、地盤に
注入する方法（以下、それぞれ１．５ショット方式また
は２ショット方式ともいう）が多く採用されている。In the injection method that uses bicarbonate of soda as a hardening agent for soil stabilization chemicals, an aqueous solution of water glass (liquid A) and an aqueous solution of bicarbonate of soda (liquid B) are generally pumped in equal amounts to the front or tip of the injection pipe. A method of merging them at the ground and injecting them into the ground (hereinafter also referred to as the 1.5-shot method or the 2-shot method, respectively) is often adopted.
しかしながら、このような従来技術には、次のような問
題点がある。即ち、
（１１重炭酸ソーダは、その水（１００ｃｃ）に対する
溶解度が５℃で７．０ｇ、２０℃で８．８ｇと小さいた
め、充分な量を溶存させることができず、高濃度の水溶
液を得ることができない。そのため、このような重炭酸
ソーダの水溶液を単独で硬化剤（Ｂ液）として用いる場
合には、水ガラスの水溶液（Ａ液）に対してゲルタイム
を短かく、特に１０秒以下にすることが不可能である。However, such conventional technology has the following problems. That is, (11) Soda bicarbonate has a low solubility in water (100 cc) of 7.0 g at 5°C and 8.8 g at 20°C, so it is impossible to dissolve a sufficient amount and obtain a highly concentrated aqueous solution. Therefore, when such an aqueous solution of bicarbonate is used alone as a curing agent (liquid B), the gel time should be shorter than that of an aqueous solution of water glass (liquid A), especially 10 seconds or less. It's impossible.
したがって、硬化剤として重炭酸ソーダの単独では、水
ガラスと瞬結性の土質安定用薬液を構成することができ
なかった。Therefore, by using sodium bicarbonate alone as a hardening agent, it has not been possible to form a soil stabilizing chemical solution that has instant setting properties with water glass.
（２）前記したようにＡ液とＢ液との現場における地盤
への注入混合は、一般に２台のポンプを用いて１．５シ
ョット方式または２ショット方式の方法により実施され
る。しかしながら、それらポンプでは、吐出量が５〜１
０％程度とバラツキを有する場合が多いため、Ａ液とＢ
液との混合比に違いを生して、ゲルタイムの変動が大き
くなることが施工上の最大の欠点とされている。(2) As described above, injecting and mixing of liquids A and B into the ground at the site is generally carried out by a 1.5-shot method or a 2-shot method using two pumps. However, these pumps have a discharge rate of 5 to 1
In many cases, there is a variation of around 0%, so liquid A and B
The biggest drawback in construction is that it causes a difference in the mixing ratio with the liquid, resulting in large fluctuations in gel time.
この問題は、用いるポンプそのものの精度に起因するも
のであり、いかに地上におけるゲルタイムの調撃に行っ
ても、解決することができながった。This problem is due to the accuracy of the pump used, and no matter how much gel time was measured on the ground, it could not be solved.
（３） さらに、重炭酸ソーダとともに他の塩類を硬
化助剤として併用する瞬結性の薬液においては、−ｒに
液温が１０℃以下になると、ゲルタイムが大幅に遅延し
て団結し難くなるため、現場の使用上に不都合があった
。(3) Furthermore, in the case of instant-setting chemical solutions that use sodium bicarbonate and other salts as curing aids, if the liquid temperature drops below 10°C, the gel time will be significantly delayed and it will be difficult to solidify. There were some inconveniences when using it on site.
本発明者らは、−上記した水ガラス系の土質安定用薬液
における問題点を解決するために、鋭意研究を重ねた。The present inventors have carried out extensive research in order to solve the problems with the water glass-based soil stabilizing chemicals mentioned above.
その結果、水ガラスのＡ液と硬化剤のＢ ？ｌとに、そ
れぞれ重炭酸ソーダを配合して用いることにより、土質
安定用薬液として目的とする良好な作用効果が発現され
る知見を得て、本発明を提案するに至ったものである。As a result, water glass liquid A and hardening agent B? The present invention has been proposed based on the finding that the desired effect as a soil stabilizing chemical can be achieved by blending and using sodium bicarbonate in each of the two.
即ち、本発明は、水ガラスに予め重炭酸ソーダを配合し
て均一に溶存させた混合液をＡ１ｌ１ｉとし、また重炭
酸を溶存させ含有する溶液をＢ液として構成された土質
安定用薬液である。また、本発明によれば、上記のＡ液
とＢ液とを別々に圧送して、注入管の手前または先端部
において合流し地盤中に注入することを特徴とする土質
安定用薬液の地盤注入工法が提供される。That is, the present invention is a chemical solution for soil stabilization, which is composed of A1l1i, which is a mixed solution in which sodium bicarbonate is preliminarily dissolved in water glass and dissolved therein, and solution B, which is a solution containing bicarbonate dissolved therein. Further, according to the present invention, the soil stabilizing chemical solution is injected into the ground, characterized in that the above-mentioned liquid A and liquid B are separately pumped, merge at the front or tip of the injection pipe, and are injected into the ground. Construction methods are provided.
本発明の土質安定用薬液においては、重炭酸ソーダをＡ
液とＢ液との双方に配合することにより、次のような効
果が得られる。In the soil stabilizing chemical solution of the present invention, sodium bicarbonate is
By blending it into both the liquid and the B liquid, the following effects can be obtained.
（υ 水に溶解が可能な濃度以下の重炭酸ソーダのみで
調製したＢ液を用いることにより、ゲルタイムが１０秒
以下である瞬結性の薬液として使用可能である。(υ By using Solution B prepared only with sodium bicarbonate at a concentration below that which can be dissolved in water, it can be used as an instant setting chemical solution with a gel time of 10 seconds or less.
（２）注入時におけるＡ液とＢ液との混合比の違いによ
り生じるゲルタイムの変動は、極端に小さくなり、特に
瞬結性の薬液としてはゲルタイムが殆んど変らない。(2) Fluctuations in gel time caused by differences in the mixing ratio of liquids A and B during injection are extremely small, and especially for an instant-setting chemical liquid, the gel time hardly changes.
（３）従来技術と比べて、薬液（Ａｆｉ＋Ｂ液）中に含
まれるトータルの重炭酸ソーダが開用であっても、ゲル
タイムを促進させる効果およびゲル強度（「ｆｌ粘結力
を高める効果がある。さらに、薬液中（Ａ液＋ＢＷ）に
含まれる重炭酸ソーダの量を増減することにより、瞬結
性のみならず所望の緩結性の薬液としても使用すること
ができる。(3) Compared to the conventional technology, even if the total sodium bicarbonate contained in the chemical solution (Afi + B solution) is used, it has the effect of accelerating gel time and increasing gel strength (fl caking force. By increasing or decreasing the amount of sodium bicarbonate contained in the chemical solution (liquid A+BW), it can be used not only as an instant-setting chemical solution but also as a desired slow-setting chemical solution.
（４）液温の低下によるゲルタイムの遅延がなく、むし
ろ促進される。(4) There is no delay in gel time due to a drop in liquid temperature, but rather it is accelerated.
以ヒのように、本発明によれば、従来技術では、全くｔ
測されない土質安定用薬液として優れた性能が付加され
、コスト的にも安価提供できる利点がある。また、従来
の水ガラス系薬液においては、調合水として海水を用い
ることができなかったが、本発明においては水ガラスの
Ａ液に重炭酸ソーダを予め配合することによって濁水を
調合水として用いろことが可能である。即ち、薬液のＡ
液として水ガラスを海水と混合した場合には、海水中に
含まれる釉イオンと水ガラスとが反応して、瞬間的に綿
状のケイ酸塩ゲルを析出するため、均一な溶液が得られ
ない。これに対して、本発明においては、海水中に重炭
酸ソーダを溶存させた溶液を水ガラスと混合してＡ液と
する場合には、ケイ酸塩のゲルを析出することなく、均
一な溶液を調製することができる。一方、Ｂ液も、海水
に重炭酸ソーダを溶存させることにより、Ａ液と混合し
ても均一な溶液として注入に供することができる。As described below, according to the present invention, in the prior art, no t
It has excellent performance as a chemical solution for soil stabilization that is not measured, and has the advantage of being available at a low cost. Furthermore, in conventional water glass-based chemical solutions, it was not possible to use seawater as the mixing water, but in the present invention, turbid water can be used as the mixing water by pre-blending sodium bicarbonate into liquid A of the water glass. It is possible. That is, A of the chemical solution
When water glass is mixed with seawater as a liquid, the glaze ions contained in the seawater react with the water glass and instantaneously precipitate a flocculent silicate gel, making it difficult to obtain a uniform solution. do not have. On the other hand, in the present invention, when a solution of sodium bicarbonate dissolved in seawater is mixed with water glass to prepare solution A, a uniform solution is prepared without precipitation of silicate gel. can do. On the other hand, by dissolving sodium bicarbonate in seawater, liquid B can also be used for injection as a uniform solution even when mixed with liquid A.
本発明のＡ液を調製する方法は、特に限定されないが、
一般に水に重炭酸ソーダを溶解した水溶液を用いて、撹
拌中の水ガラス液に添加する方法が好ましい。また、現
場的には、予めＢ液として調製された重炭酸ソーダ水溶
液の一部をポンプにより、Ａ液の混合槽に導入する方法
も用いられる。The method for preparing liquid A of the present invention is not particularly limited, but
Generally, it is preferable to use an aqueous solution of sodium bicarbonate dissolved in water and add it to the water glass liquid while stirring. Furthermore, in the field, a method is also used in which a part of the sodium bicarbonate aqueous solution prepared in advance as the B liquid is introduced into the A liquid mixing tank using a pump.
本発明のＡ液である水ガラス溶液中に溶存させる重炭酸
ソーダの量は、水ガラスの濃度、目的とする薬液のゲル
タイム、液温度などにより異なるため厳密に限定できな
いが、−ｉに調合水として清水を用いる場合には、Ａ液
２０Ｏｚ中に１〜８ｋｇ、好ましくは２〜７ ｋｇであ
り、また海水を用いる場合には、０．５〜５ ｋｇ、好
ましくは１．５〜４．５ｋｇの割合である。即ち、水ガ
ラスに対する重炭酸ソーダの配合割合が、上記した下限
値より少ない場合には、本発明の目的とする特有の性質
が充分に発揮されず、特に所望の安定したゲルタイムを
有する瞬結性の薬液が得られず、また上記の上限値より
大きい場合には、Ａ液のみにおいて数分以内にゲル化を
起すため、特に現場の施工性で難点となる。The amount of sodium bicarbonate dissolved in the water glass solution, which is the liquid A of the present invention, cannot be strictly limited because it varies depending on the concentration of the water glass, the gel time of the intended chemical solution, the liquid temperature, etc.; When using seawater, the proportion is 1 to 8 kg, preferably 2 to 7 kg in 20 oz of liquid A, and when seawater is used, the proportion is 0.5 to 5 kg, preferably 1.5 to 4.5 kg. It is. That is, if the blending ratio of sodium bicarbonate to water glass is less than the above-mentioned lower limit, the specific properties aimed at by the present invention will not be fully exhibited, and the instant-setting chemical solution will not have the desired stable gel time. If the above upper limit is not obtained, gelation occurs within a few minutes in only the A solution, which poses a problem particularly in terms of on-site workability.
本発明に用いる水ガラスとしては、従来の地盤注入工法
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
、市販の珪酸アルカリで特に制限されず、一般にＳｉＯ
□／Ｎａ２Ｏのモル比が２〜４、比重が１．３〜１．４
の珪酸ソーダ水溶液が必要に応して希釈して用いられる
。The water glass used in the present invention is the main component of the water glass-based chemical solution used in the conventional ground injection method, and is not particularly limited to commercially available alkali silicate.
□/Na2O molar ratio is 2 to 4, specific gravity is 1.3 to 1.4
An aqueous solution of sodium silicate is used after being diluted as necessary.
一方、本発明における薬液のＢ液は、硬化剤として、重
炭酸ソーダを単独で水に溶解（溶存）して、好ましくは
充分に溶存する濃度の水溶液を調製すればよく、さらに
必要に応じて重炭酸ソーダとともに例えばに、 Ｎａ、
Ｍ＠の塩化物、硫酸塩、有機系の硬化剤など従来公知
の硬化剤と併用することもできる。On the other hand, liquid B of the chemical solution in the present invention may be prepared by dissolving (dissolving) sodium bicarbonate alone in water as a curing agent, preferably to prepare an aqueous solution having a sufficient concentration to dissolve it, and if necessary, adding sodium bicarbonate to the solution. For example, Na,
It can also be used in combination with conventionally known curing agents such as M@ chlorides, sulfates, and organic curing agents.
本発明の土質安定用薬液は、水ガラス溶液に重炭酸ソー
ダを溶存させた溶液（Ａ液）と重炭酸ソーダの溶液（Ｂ
１）とを従来公知の地盤注入工法により用いる。即ち、
地盤注入工法の二液式に準して、Ａ液とＢ液とを予め別
々の槽に調製して、それぞれＡ液とＢｉとを別々の注入
ポンプにより圧送し、注入管の手前で合流しく１．５シ
ョット式）、あるいは注入管の先端部で合流させて（２
ショット式）、それらの混合液を地盤中に注入する方法
で実施する。The soil stabilizing chemical solution of the present invention includes a solution in which sodium bicarbonate is dissolved in a water glass solution (solution A) and a solution of sodium bicarbonate (solution B).
1) is used by the conventionally known ground injection method. That is,
In accordance with the two-component type of ground injection method, liquid A and liquid B are prepared in advance in separate tanks, and liquid A and Bi are pumped using separate injection pumps, and they are combined in front of the injection pipe. 1.5 shot type) or by merging at the tip of the injection tube (2
shot type), and by injecting a mixture of these into the ground.
上記に説明したように、本発明は、重炭酸ソーダを溶存
させた水ガラス溶液（Ａ ？＆ ）の提供により、硬化
剤の溶液（Ｂ液）とともに用いて優れた瞬結性を発揮す
る地盤注入の土質安定用薬液を得ることができる。即ち
、本発明の薬液においては、上記したＡ液とＢ液との混
合により、次のような特長を有する。即ち、
（１） ゲルタイムを短かくすることができ、特に瞬
結性に効果を発揮することができる。As explained above, the present invention provides a water glass solution (A?&) in which bicarbonate of soda is dissolved, and is used together with a hardening agent solution (B solution) to achieve excellent instant setting properties. A chemical solution for soil stabilization can be obtained. That is, the chemical solution of the present invention has the following features by mixing the above-mentioned solutions A and B. That is, (1) the gel time can be shortened, which is particularly effective for instant setting.
（２）Ａ液とＢ液との混合比が異なっても、安定したゲ
ルタイムが得られる。(2) Even if the mixing ratio of liquid A and liquid B is different, a stable gel time can be obtained.
（３）液温の変化に対して、安定したゲルタイムを示し
、かつ特に瞬結性の薬液において固結くホモゲル）！度
が高く得られる。(3) A homogel that shows stable gel time against changes in liquid temperature and solidifies especially in instant-setting chemical solutions)! You can get a high degree of strength.
このように、本発明の薬液によれば、下記する実施例の
結果からも明らかに、良好な土質安定化の達成が充分に
期待できる。As described above, according to the chemical solution of the present invention, it can be fully expected to achieve good soil stabilization, as is clear from the results of the following examples.
以下、本発明について、実施例および比較例を挙げて説
明するが、本発明はこれらに限定されるものでない。The present invention will be described below with reference to Examples and Comparative Examples, but the present invention is not limited thereto.
なお、実施例および比較例において、水ガラスは５ｉＯ
ｚ／ＮａｚＯのモル比３．１５、比重１．３２であり、
重炭酸ソーダは工業用であり、調合水は清水（水道水）
と海水を用いた。In addition, in Examples and Comparative Examples, water glass is 5iO
The molar ratio of z/NazO is 3.15, the specific gravity is 1.32,
Soda bicarbonate is for industrial use, and the mixed water is clean water (tap water).
and seawater.
実施例１および比較例１
第１表に示す配合量により、それぞれＡ？＆とＢ液とを
調製した。即ち、比較例（比）のｍｌＮ［Ｌ５において
は、Ａ液には重炭酸ソーダを配合せずに、Ｂ液のみ所定
量の重炭酸ソーダを配合して水溶液を調製した。なお、
比の迎４およびぬ５におけるＢ液では、重炭酸ソーダが
完全に溶解されず（不溶であり）、沈澱物を生じた。実
施例（実）のＭ１〜Ｍ５においては、Ａ液およびＢ液と
もに所定量の重炭酸ソーダを配合して調製して、いずれ
も完全な溶解状態を示す溶液を得た。Example 1 and Comparative Example 1 According to the blending amounts shown in Table 1, A? & and B solution were prepared. That is, in Comparative Example (Ratio) mlN[L5, an aqueous solution was prepared by adding a predetermined amount of sodium bicarbonate only to Solution B without adding sodium bicarbonate to Solution A. In addition,
In solutions B at ratios 4 and 5, the sodium bicarbonate was not completely dissolved (insoluble) and formed a precipitate. In Examples M1 to M5 (actual), both solutions A and B were prepared by blending a predetermined amount of sodium bicarbonate, and both solutions were obtained in a completely dissolved state.
次に、上記したＡ液とＢ液とを液温１８℃に維持して混
合し、混合直後の状態を観察するとともに、ゲルタイム
を測定した。それらの結果を第１表に示した。Next, the above-described liquids A and B were mixed while maintaining the liquid temperature at 18° C., and the state immediately after mixing was observed and the gel time was measured. The results are shown in Table 1.
実施例２および比較例２
実施例１および比較例１において、調合水の清水を代り
に海水を用いた以外は同様に、第２表に示す配合量でＡ
液とＢ液とを調製し、さらにＡ液とＢｆｌとを混合した
。それらの結果を第２表に示す。Example 2 and Comparative Example 2 In Example 1 and Comparative Example 1, A was prepared in the same manner as in Example 1 and Comparative Example 1, except that seawater was used instead of fresh water in the preparation.
A liquid and a liquid B were prepared, and a liquid A and Bfl were further mixed. The results are shown in Table 2.
実施例３および比較例３
前記した実施例１の階２および１ｌｈ５、比較例１のＭ
２および弘５において調製したＡ液とＢ液とを用いて、
それぞれ混合比の相違によるゲルタイムの変動について
測定した結果を第１図に示す。Example 3 and Comparative Example 3 Floors 2 and 1lh5 of Example 1 and M of Comparative Example 1
Using liquid A and liquid B prepared in 2 and Kou 5,
FIG. 1 shows the results of measuring the variation in gel time due to different mixing ratios.
第１図より、比較例の場合は、ゲルタイムの変動が大き
く、特に緩結性のＭ２では変動が非常に大きいことが認
められる。したがって、この比較例１のような緩結性の
従来技術では、施工上で問題となる。From FIG. 1, it can be seen that in the case of the comparative example, the gel time fluctuates greatly, and especially in the case of M2, which has a slow setting property, the fluctuation is extremely large. Therefore, the loosely binding conventional technology like Comparative Example 1 poses a problem in construction.
これに対して、本発明の瞬結性である実施例ＩのＭ５の
場合は、Ａ液とＢ液との混合比が相違しても、ゲルタイ
ムが殆んど変化せず、また緩結性の実施例１の隘２でも
、ゲルタイムの変動は非常に小さい。したがって、この
ような実施例のような緩結性の技術では、施工上で問題
が全くないことが分る。On the other hand, in the case of M5 of Example I, which has instant setting properties of the present invention, even if the mixing ratio of liquid A and liquid B is different, the gel time hardly changes, and the slow setting property Even in case 2 of Example 1, the variation in gel time was very small. Therefore, it can be seen that there is no problem at all in construction with the loose setting technique as in this embodiment.
実施例４および比較例４
液塩の違いによるゲルタイムの変動について、薬液中（
Ａ液＋Ｂ液）に含まれる重炭酸ソーダが同量である前実
施例１の弘５および比較例１の狙５に従って実施した結
果を第２図に示す。Example 4 and Comparative Example 4 Regarding variations in gel time due to differences in liquid salts,
FIG. 2 shows the results of carrying out the experiment according to Hiroshi 5 of Example 1 and Aim 5 of Comparative Example 1, in which the same amount of sodium bicarbonate was contained in Liquid A+Liquid B.
第２図より、比較例１の１１ｈ５の場合には、液温の違
いによってゲルタイムが大きく変動するが、実施例１の
階５の場合には液温によるゲルタイムの変化が殆んどな
く、また液温か常温（１８℃）より低温（５℃）の方が
かえってゲルタイムが短かくなるという興味ある結果が
得られた。From Figure 2, in the case of 11h5 of Comparative Example 1, the gel time varies greatly depending on the difference in liquid temperature, but in the case of floor 5 of Example 1, there is almost no change in gel time due to liquid temperature. An interesting result was obtained that the gel time was actually shorter at low temperature (5°C) than at liquid temperature or room temperature (18°C).
実施例５および比較例５
薬液中に含まれる重炭酸ソーダが同量である実施例１の
階５と比較例１の！ｌｈ５の場合について、−軸圧縮強
度を測定した。その結果、実施例１の！ｌｋ５の場合は
０．５０ ｋｇｆ／Ｃ４であり、比較例１の１１１５の
場合は０．３２ ｋｇｆ／ｃｎ！であった。Example 5 and Comparative Example 5 Floor 5 of Example 1 and Comparative Example 1 where the same amount of bicarbonate of soda is contained in the chemical solution! In the case of lh5, -axial compressive strength was measured. As a result, in Example 1! In the case of lk5, it is 0.50 kgf/C4, and in the case of Comparative Example 1, 1115, it is 0.32 kgf/cn! Met.
第１図は、実施例３および比較例３において、実施例１
の隘２およびＮ１１５、比較例１の階２および！ｌｈ５
で調製したＡ液とＢ液とを用いて、それらの混合比を変
化させて、得られるゲルタイムの変動について測定した
結果を図示したものである。
第２図は、実施例３および比較例３において、実施例１
の階５、比較例１のＮ５に従って液温の相違によるゲル
タイムの変動を図示したものである。FIG. 1 shows the results of Example 1 in Example 3 and Comparative Example 3.
Floor 2 and N115 of Comparative Example 1, Floor 2 and! lh5
This figure illustrates the results of measuring the variation in gel time obtained by changing the mixing ratio of solutions A and B prepared in . FIG. 2 shows the results of Example 1 in Example 3 and Comparative Example 3.
FIG. 5 is a diagram illustrating variations in gel time due to differences in liquid temperature according to N5 of Comparative Example 1.
Claims (2)
合液をＡ液として、重炭酸ソーダを溶存させた溶液をＢ
液とする土質安定用薬液(1) Solution A is a mixture of water glass and bicarbonate of soda, and B is a solution of bicarbonate of soda.
Chemical liquid for soil stabilization
々に圧送して、注入管の手前または先端部において合流
し地盤中に注入することを特徴とする注入工法(2) An injection method characterized in that liquid A and liquid B according to claim 1 are separately pumped, merge at the front or tip of an injection pipe, and are injected into the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336504A JP2758050B2 (en) | 1989-12-27 | 1989-12-27 | Chemical solution for soil stabilization and its injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336504A JP2758050B2 (en) | 1989-12-27 | 1989-12-27 | Chemical solution for soil stabilization and its injection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03199286A true JPH03199286A (en) | 1991-08-30 |
| JP2758050B2 JP2758050B2 (en) | 1998-05-25 |
Family
ID=18299817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1336504A Expired - Lifetime JP2758050B2 (en) | 1989-12-27 | 1989-12-27 | Chemical solution for soil stabilization and its injection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2758050B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100613723B1 (en) * | 2004-07-23 | 2006-08-23 | (주)국송 | Manufacturing method for sodium accumulation and chemical property adsorption ratio conditioner in soil |
| JP6159963B1 (en) * | 2016-10-31 | 2017-07-12 | 強化土株式会社 | Ground injection material and ground improvement method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS625955A (en) * | 1985-07-02 | 1987-01-12 | メレルダウフア−マス−テイカルズ インコ−ポレ−テツド | Novel compounds |
-
1989
- 1989-12-27 JP JP1336504A patent/JP2758050B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS625955A (en) * | 1985-07-02 | 1987-01-12 | メレルダウフア−マス−テイカルズ インコ−ポレ−テツド | Novel compounds |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100613723B1 (en) * | 2004-07-23 | 2006-08-23 | (주)국송 | Manufacturing method for sodium accumulation and chemical property adsorption ratio conditioner in soil |
| 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 |
|---|---|
| JP2758050B2 (en) | 1998-05-25 |
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