JPH0751780B2 - Fluidization method - Google Patents
Fluidization methodInfo
- Publication number
- JPH0751780B2 JPH0751780B2 JP16391287A JP16391287A JPH0751780B2 JP H0751780 B2 JPH0751780 B2 JP H0751780B2 JP 16391287 A JP16391287 A JP 16391287A JP 16391287 A JP16391287 A JP 16391287A JP H0751780 B2 JPH0751780 B2 JP H0751780B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- limit value
- bag
- upper limit
- pressure reaches
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000005243 fluidization Methods 0.000 title 1
- 238000002347 injection Methods 0.000 claims description 42
- 239000007924 injection Substances 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、地中に埋設された袋内に固結性流動化液など
を注入する方法に関するものである。TECHNICAL FIELD The present invention relates to a method for injecting a solidifying fluidizing liquid or the like into a bag buried in the ground.
（従来の技術と問題点） 先端や側方部に袋体を有した既製杭を、予め掘削した掘
削孔の地中に埋設した後、注入管などを通して袋内に固
結性流動化液などを注入する場合、できるだけ多くの量
を注入し、袋を拡げて十分な大きさの球根を造成するの
が望まれる。(Prior art and problems) After burying a ready-made pile having a bag body at the tip and side parts in the ground of a previously excavated hole, a solidifying fluidized liquid etc. in the bag through an injection pipe etc. Injecting as much as possible, it is desirable to inject as much as possible and expand the bag to create a bulb of sufficient size.
この場合、流動化液を袋内へ強い力で注入するために、
単純に低速注入で送ることになるが、注入時間が長くな
り、作業性が悪くなる。逆に、単純に高速注入で送ると
強い力で注入することができないため、十分に袋を開く
ことができないとともに、急激な注入により袋体が破裂
することも考えられる。In this case, in order to inject the fluidizing liquid into the bag with a strong force,
Although it is simply sent by low-speed injection, the injection time becomes long and the workability deteriorates. On the contrary, if it is simply sent by high-speed injection, it cannot be injected with a strong force, so that the bag cannot be opened sufficiently and the bag body may burst due to rapid injection.
（問題点を解決するための手段） 本発明は、上述の問題点の解決を図つたものであり、地
中に埋設された袋体を十分に拡げ大きな球根を経済的に
造成することを目的としたものである。(Means for Solving Problems) The present invention is intended to solve the above problems, and an object thereof is to sufficiently expand a bag body buried in the ground to economically create a large bulb. It is what
即ち、本発明は、地中に埋設された袋内に固結性流動化
液を注入する方法において、注入圧力の下限値と上限値
を設定しておき、注入圧力が上限値に達すると注入を中
断させ、注入圧力が下限値に達すると前回より遅い注入
速度で注入を開始して注入圧力が上限値に達すると注入
を中断させ、これを繰り返して注入することを特徴とす
る流動化液の注入方法である。That is, the present invention is a method of injecting the solidifying fluidizing liquid into a bag buried in the ground, in which the lower limit value and the upper limit value of the injection pressure are set, and when the injection pressure reaches the upper limit value, the injection is performed. When the injection pressure reaches the lower limit value, injection is started at a slower injection speed than the previous time, and when the injection pressure reaches the upper limit value, the injection is interrupted, and this is repeated to perform injection. Injection method.
以下、本発明の一実施例を図面に基づき説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図は、先端側方部に袋体１を有した既製杭２を予め
掘削した掘削孔３に埋設した図である。この袋体１に注
入管４を通し固結性流動化液５を注入する場合、第２図
の模式図に示すように、先ず、注入量Ｑと注入速度V1・
V2・V3・V4……Vnおよび注入圧力の上限値P2と下限値
P1、また注入圧力が上限値P2に達する回数n1，n2，n3，
n4……nnを設定しておく。FIG. 1 is a view in which a prefabricated pile 2 having a bag body 1 on a side portion of a tip end thereof is buried in an excavation hole 3 which has been excavated in advance. When the solidifying fluidizing liquid 5 is injected into the bag body 1 through the injection pipe 4, as shown in the schematic diagram of FIG. 2, first, the injection amount Q and the injection speed V 1
V 2・ V 3・ V 4 …… V n and upper limit P 2 and lower limit of injection pressure
P 1 , the number of times the injection pressure reaches the upper limit P 2 , n 1 , n 2 , n 3 ,
n 4 …… n Set n .
注入量Ｑは袋内の容積とし、１回目の注入速度V1は高速
度が好ましく100l/分〜200l/分位がよい。２回目の注入
速度V2はV1の数割減におとすとともに、３回目の注入速
度V3も同様、V2の数割減におとす。４回目以降も同様に
設定する。The injection amount Q is the volume in the bag, and the first injection speed V 1 is preferably high and is preferably 100 l / min to 200 l / min. The second injection speed V 2 is reduced by a few percent of V 1 , and the third injection speed V 3 is also reduced by a few percent of V 2 . The same is set for the fourth and subsequent times.
注入圧力の上限値P2は袋体１の許容破裂圧力以下とし、
下限値P1はP2の1/2以上が好ましい。それ以下にするとP
1に達する所要時間が長くなり、作業性が悪くなる。The upper limit value P 2 of the injection pressure is equal to or lower than the allowable burst pressure of the bag body 1,
The lower limit value P 1 is preferably 1/2 or more of P 2 . Below that P
The time required to reach 1 becomes long and the workability deteriorates.
注入圧力が上限値P2に達する回数ｎは掘削孔中の地盤の
状態にもよるが複数回が好ましい。The number n of times the injection pressure reaches the upper limit P 2 depends on the condition of the ground in the excavation hole, but is preferably a plurality of times.
以上を予め設定することによつて、前半は高速度にて注
入され、短時間で袋１は膨らむと同時にその後袋１が掘
削孔３中の地盤６に接してくると低速度にてくり返し注
入される。その結果、強い力で注入されることになり、
地盤６を押し拡げるとともに十分な固結性流動化液５を
注入できるのである。By presetting the above, the first half is injected at high speed, the bag 1 inflates in a short time, and at the same time when the bag 1 comes into contact with the ground 6 in the excavation hole 3, it is repeatedly injected at low speed. To be done. As a result, it will be injected with strong force,
It is possible to spread the ground 6 and inject a sufficient solidifying fluidizing liquid 5.
尚、掘削孔３が袋体１の容積よりも十分に大きく掘削さ
れている場合は、設定注入量Ｑにて注入を終了すること
になろうし、もし袋体１の容積よりも小さく掘削されて
いる場合は、注入圧力が上限値P2に達する設定回数ｎに
て注入を終了することになる。In addition, when the excavation hole 3 is sufficiently excavated larger than the volume of the bag body 1, the injection will be ended at the set injection amount Q, and if the excavation hole 3 is excavated smaller than the volume of the bag body 1. If so, the injection is terminated at the set number of times n when the injection pressure reaches the upper limit value P 2 .
（発明の効果） 以上述べたように本発明によれば、掘削孔の掘削程度に
かかわらず、袋体を破裂させることなく短時間で袋体に
多くの量を注入できるとともに袋体を拡げ十分な大きさ
の球根を造成することができる。(Effect of the Invention) As described above, according to the present invention, a large amount can be injected into the bag body in a short time without bursting the bag body regardless of the degree of excavation of the drill hole, and the bag body can be sufficiently expanded. Bulbs of various sizes can be created.
更に、透水性の袋体を使用した場合、脱水効果により20
％増しの固結性流動化液を注入することができる。In addition, if a water-permeable bag is used, it will
More% solidifying fluidizing fluid can be injected.
第１図は、袋体を有した既製杭を予め掘削した掘削孔に
埋設した断面図。第２図は、本発明の注入方法を示した
模式図である。 １……袋体、２……既製杭、３……掘削孔、４……注入
管、５……固結性流動化液、６……地盤。FIG. 1 is a cross-sectional view in which a ready-made pile having a bag body is buried in a previously drilled hole. FIG. 2 is a schematic diagram showing the injection method of the present invention. 1 ... bag, 2 ... ready-made pile, 3 ... drilling hole, 4 ... injection pipe, 5 ... solidifying fluid, 6 ... ground.
Claims (1)
注入する方法において、注入圧力の下限値と上限値を設
定しておき、該注入圧力が上限値に達すると注入を中断
させ、注入圧力が下限値に達すると前回より遅い注入速
度で注入を開始して注入圧力が上限値に達すると注入を
中断させ、これを繰り返して注入することを特徴とする
流動化液の注入方法1. A method of injecting a solidifying fluidizing liquid into a bag buried in the ground, wherein a lower limit value and an upper limit value of the injection pressure are set and injection is performed when the injection pressure reaches the upper limit value. When the injection pressure reaches the lower limit value, injection is started at a slower injection speed than the previous time, and when the injection pressure reaches the upper limit value, the injection is interrupted, and this is repeated to perform injection. Injection method
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16391287A JPH0751780B2 (en) | 1987-07-02 | 1987-07-02 | Fluidization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16391287A JPH0751780B2 (en) | 1987-07-02 | 1987-07-02 | Fluidization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6410820A JPS6410820A (en) | 1989-01-13 |
| JPH0751780B2 true JPH0751780B2 (en) | 1995-06-05 |
Family
ID=15783186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16391287A Expired - Fee Related JPH0751780B2 (en) | 1987-07-02 | 1987-07-02 | Fluidization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751780B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6556485B2 (en) * | 2015-04-22 | 2019-08-07 | 日本基礎技術株式会社 | Ground injection method |
-
1987
- 1987-07-02 JP JP16391287A patent/JPH0751780B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6410820A (en) | 1989-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |