JPH0629504B2 - Method to inject and generate air bubbles in the ground - Google Patents
Method to inject and generate air bubbles in the groundInfo
- Publication number
- JPH0629504B2 JPH0629504B2 JP63052551A JP5255188A JPH0629504B2 JP H0629504 B2 JPH0629504 B2 JP H0629504B2 JP 63052551 A JP63052551 A JP 63052551A JP 5255188 A JP5255188 A JP 5255188A JP H0629504 B2 JPH0629504 B2 JP H0629504B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- pressure
- water
- saturated
- bubble
- 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
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は各種の土木建築現場において、透水性の高い地
盤の掘削時に、地盤内への地下水の流入を減少させて掘
削を容易にするために、地盤中に気泡を注入、発生させ
る方法に係わるものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention reduces the inflow of groundwater into the ground at the time of excavating the ground having high water permeability in various civil engineering and construction sites to facilitate the excavation. In addition, it relates to a method of injecting and generating bubbles in the ground.
（従来の技術） 従来、透水性地盤における所要個所に、予め発泡させた
泡状の物質を、直接層状または面状に多量に注入して、
土粒子間の間隙部に気泡を介在せしめることによって、
地盤の透水性を著しく低下させて透水地盤の遮水、止水
を図る方法がある。(Prior Art) Conventionally, a large amount of a pre-foamed foam-like substance is directly injected into a layered or planar shape at a required place in a permeable ground,
By interposing air bubbles in the gap between soil particles,
There is a method of significantly impairing the water permeability of the ground to prevent water from passing through the water-permeable ground.
（発明が解決しようとする課題） 前記従来の方法には、次のような問題点があった。(Problems to be Solved by the Invention) The conventional method has the following problems.
ｉ）発泡させた泡状の物質を直接地中に注入しても、注
入口付近で目詰まりが生じ、気泡が土粒子間の間隙部に
均一に分散しない。i) Even if the foamed foam-like substance is directly injected into the ground, clogging occurs near the injection port, and the bubbles are not uniformly dispersed in the gap between the soil particles.
ii）発泡させて気泡の保形のために薬剤を使用しなけれ
ばならず、高価で且つ地下水汚染の惧れがある。ii) The agent must be used for foaming and shape retention of air bubbles, which is expensive and fears contamination of groundwater.
本発明は前記従来技術の有する問題点に鑑み、且つ気体
の体積がボイルウーの法則によりその圧力に反比例する
ことに着目して提案されたものであって、その目的とす
る処は、自由水面を持つ地盤は勿論のこと特に被圧水が
存在する地盤に対して広範囲に亘って安全、確実、均一
に、而も低コストで気泡を分散できる方法を提供する点
にある。The present invention has been proposed in view of the above problems of the prior art, and focusing on the fact that the volume of a gas is inversely proportional to its pressure according to Boyle-Wu's law, and the purpose is to set the free water surface to The point is to provide a method capable of dispersing bubbles safely, surely, and uniformly over a wide area, not to mention the ground to be held, and especially to the ground where pressurized water exists, at a low cost.
（課題を解決するための手段） 前記の目的を達成するため、本発明に係る地盤中に気泡
を注入、発生する方法は、地下水の水圧より高い水圧下
で液体に気体を飽和、または過飽和状態まで溶解させた
高圧気泡注入材を地盤中に注入するように構成されてい
る。(Means for Solving the Problems) In order to achieve the above object, a method of injecting and generating bubbles in the ground according to the present invention is a method of saturating a gas in a liquid under a water pressure higher than that of groundwater, or a supersaturated state. It is configured to inject the high-pressure bubble injecting material that has been dissolved up to the ground.
更に本発明は地盤中に析出された気泡の保形、安定を図
るため、前記高圧気泡注入材に気泡形成安定剤を混入す
るものである。Further, in the present invention, in order to maintain the shape and stability of the bubbles deposited in the ground, a bubble formation stabilizer is mixed in the high pressure bubble injecting material.
（作 用） 本発明によれば地下水の水圧より高い水圧下で、気体を
飽和、または過飽和状態まで溶解させて高圧気泡注入材
を作り、同高圧気泡注入材を飽和地盤中に注入すること
によって、高圧で且つ気体の飽和液体を、地盤内の土粒
子間の間隙水と置換させると、同間隙水と置き換えされ
た高圧液体は、地下水の圧力まで減少し、これに伴って
同液体中に溶解している気体が気泡となって析出し、飽
和地盤内に広範囲に亘って確実、均一に分散する。(Operation) According to the present invention, a high-pressure bubble injecting material is prepared by dissolving gas to a saturated or supersaturated state under a water pressure higher than that of groundwater, and injecting the high-pressure bubble injecting material into saturated ground. , When a saturated liquid of high pressure and gas is replaced with pore water between soil particles in the ground, the high pressure liquid replaced with the pore water decreases to the pressure of groundwater, and accordingly The dissolved gas is deposited as bubbles and is dispersed in the saturated ground reliably and uniformly over a wide area.
この際、前記高圧気泡注入材に気泡形成安定剤を混入す
ると、飽和地盤内に析出された気泡が有膜独立気泡とな
り、安定した状態に保持される。At this time, if a bubble formation stabilizer is mixed into the high-pressure bubble injecting material, the bubbles deposited in the saturated ground become film-bound closed cells and are held in a stable state.
（実施例） 以下本発明を実施例について説明する。(Example) Hereinafter, the present invention will be described with reference to Examples.
地下水の水圧より高い水圧下で、液体に気体を飽和、ま
たは過飽和状態で溶解させた高圧気泡注入材を作る。A high-pressure bubble injection material is prepared by dissolving a gas in a liquid in a saturated or supersaturated state under a water pressure higher than that of groundwater.
なお液体は前記水、著しくは粘性を有するものを使用
し、特に地下水の流速が速い地盤では粘性を有する液体
を使用する。As the liquid, the above-mentioned water, which is extremely viscous, is used, and in particular, the viscous liquid is used on the ground where the flow velocity of groundwater is high.
また気体は空気、二酸化炭素等、毒性を有しないものを
使用する。The gas used should be non-toxic, such as air or carbon dioxide.
更に加圧する圧力は地盤の間隙率、地下水圧、必要空気
量等によって決定する。The pressure to be applied is determined by the porosity of the ground, the groundwater pressure, the required air volume, etc.
次いで前記高圧気泡注入材を従来の地盤注入工法と同様
の方法によって、地盤の所要個所に層状、または面状に
必要量注入すると、同注入材は気体を飽和、あるいは過
飽和状態まで溶解させた高圧の液体であるので、土粒子
間の間隙水と容易に置換される。Next, by injecting the required amount of the high-pressure bubble injecting material into a required portion of the ground in a layered or planar manner by the same method as the conventional ground injecting method, the injecting material is a high-pressure gas in which gas is saturated or dissolved to a supersaturated state Since it is a liquid, it is easily replaced by the interstitial water between soil particles.
このように土粒子間の間隙水と置換された高圧の液体
は、地下水の圧力まで減少し、これに伴って、液体中に
溶解している気体が気泡となって析出し、飽和地盤内に
広範囲に亘って確実、均一に分散し、この結果透水性地
盤の遮水、止水効果が著しく向上する。In this way, the high-pressure liquid, which is replaced with the interstitial water between the soil particles, decreases to the pressure of the groundwater, and the gas dissolved in the liquid precipitates as bubbles in the saturated ground. Disperses reliably and uniformly over a wide range, and as a result, the water-blocking and water-stopping effects of the permeable ground are significantly improved.
なお前記高圧気泡注入材に気泡形成安定剤を少量混入す
ることにより、飽和地盤内で析出した気泡が独立した有
膜独立気泡となる。By mixing a small amount of a bubble formation stabilizer into the high-pressure bubble injecting material, the bubbles deposited in the saturated ground become independent film-containing closed cells.
（発明の効果） 本発明によれば前記したように、地下水の水圧より高い
水圧下で液体に気体を飽和、または過飽和状態まで溶解
させた高圧気泡注入材を作り、同注入材を飽和地盤中に
注入することによって、同注入材の液体中に溶解してい
る気体を気泡として析出させ、飽和地盤内に広範囲に亘
って確実に、且つ均一に分散せしめることによって、透
水性地盤の遮水、止水効果を著しく向上させることがで
きる。(Effects of the Invention) According to the present invention, as described above, a high-pressure bubble injecting material in which a gas is saturated with a liquid under a water pressure higher than that of groundwater or dissolved to a supersaturated state is prepared, and the injecting material is placed in a saturated ground By injecting into, the gas dissolved in the liquid of the same injection material is deposited as bubbles, surely and uniformly over a wide range in the saturated ground, the water impermeability of the permeable ground, The water blocking effect can be remarkably improved.
また前記高圧気泡注入材は、液体として水を使用するこ
とができるので、安価で且つ公害等を発生する惧れがな
い。In addition, since the high-pressure bubble injecting material can use water as a liquid, it is inexpensive and is not likely to cause pollution.
請求項２の方法においては、前記高圧気泡注入材に気泡
形成安定剤を混入することによって、飽和地盤内に析出
した気泡が安定した有膜独立気泡となり、地盤の遮水、
止水効果を更に向上しうるものである。In the method according to claim 2, by mixing a bubble formation stabilizer into the high-pressure bubble injecting material, the bubbles deposited in the saturated ground become stable film-containing closed cells, and the ground is impervious to water.
The water blocking effect can be further improved.
Claims (2)
を飽和、または過飽和状態まで溶解させた高圧気泡注入
材を地盤中に注入することを特徴とする地盤中に気泡を
注入、発生させる方法。1. A bubble is injected and generated in the ground, characterized in that a high-pressure bubble injecting material in which a gas is saturated or supersaturated in a liquid is injected into the ground under a water pressure higher than that of groundwater. Method.
入することを特徴とする請求項(1)記載の地盤中に気泡
を注入、発生させる方法。2. A method for injecting and generating bubbles in the ground according to claim 1, wherein a bubble formation stabilizer is mixed into the high-pressure bubble injecting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63052551A JPH0629504B2 (en) | 1988-03-08 | 1988-03-08 | Method to inject and generate air bubbles in the ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63052551A JPH0629504B2 (en) | 1988-03-08 | 1988-03-08 | Method to inject and generate air bubbles in the ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01226926A JPH01226926A (en) | 1989-09-11 |
| JPH0629504B2 true JPH0629504B2 (en) | 1994-04-20 |
Family
ID=12917939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63052551A Expired - Lifetime JPH0629504B2 (en) | 1988-03-08 | 1988-03-08 | Method to inject and generate air bubbles in the ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629504B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104798A (en) * | 1980-12-16 | 1982-06-29 | Takenaka Komuten Co | Prevention of water leakage of tunnel |
| JPS58204213A (en) * | 1982-05-25 | 1983-11-28 | Nitto Chem Ind Co Ltd | Injection of silicate-based grout for stabilization of ground into ground |
-
1988
- 1988-03-08 JP JP63052551A patent/JPH0629504B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01226926A (en) | 1989-09-11 |
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| Date | Code | Title | Description |
|---|---|---|---|
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