JPH01250516A - Method of filling ground improving slurry - Google Patents
Method of filling ground improving slurryInfo
- Publication number
- JPH01250516A JPH01250516A JP7854588A JP7854588A JPH01250516A JP H01250516 A JPH01250516 A JP H01250516A JP 7854588 A JP7854588 A JP 7854588A JP 7854588 A JP7854588 A JP 7854588A JP H01250516 A JPH01250516 A JP H01250516A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- pipe
- ground
- casing pipe
- tremie pipe
- 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
- 239000002002 slurry Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 16
- 239000010883 coal ash Substances 0.000 claims abstract description 4
- 239000004744 fabric Substances 0.000 abstract description 11
- 239000002689 soil Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000000872 buffer Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、軟弱地盤を改良するに際して行われる地盤
内へのスラリー充填方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of filling slurry into the ground, which is performed when improving soft ground.
〔従来技術およびこの発明が解決すべき課題〕従来この
種の充填方法としては、地盤改良用として地盤内に形成
される柱状固結体へのスラリーの充填は柱状体の全容積
を下部より部分ごとに順次加圧充填している。しかしこ
の方法では全長に渡り十分な加圧が不可能となるため、
脱水が不十分となる。また下部よりトレミーパイプを引
き上げながらの加圧充填では、脱水体に密度の差が生じ
、ひいては柱状体強度に大きな差が生じることがある。[Prior Art and Problems to be Solved by the Invention] Conventionally, this type of filling method involves filling slurry into a columnar solidified body formed in the ground for soil improvement by filling the entire volume of the columnar body to a portion from the bottom. Each container is filled under pressure one after another. However, with this method, it is impossible to apply sufficient pressure over the entire length, so
Dehydration becomes insufficient. Furthermore, when the tremie pipe is pulled up from the lower part while being pressurized and filled, a difference in density may occur in the dehydrated bodies, which may in turn cause a large difference in the strength of the columnar bodies.
この発明は前述した事情に鑑みて創案されたもので、そ
の目的は柱状体全長にわたりスラリーを連続的に拡径加
圧充填すると共に、全長にわたり均一な脱水を、計って
、均質な柱状体を作製することができる地盤改良用スラ
リーの充填方法を提供することにある。This invention was devised in view of the above-mentioned circumstances, and its purpose is to continuously expand and pressurize slurry over the entire length of the columnar body, and to achieve uniform dewatering over the entire length to create a homogeneous columnar body. An object of the present invention is to provide a method for filling slurry for ground improvement that can be prepared.
この発明のスラリー充填方法によればケーシングパイプ
の先端部内周において、ケーシングパイプに密接するト
レミーパイプを、地盤中に挿入する。According to the slurry filling method of the present invention, a tremie pipe that is in close contact with the casing pipe is inserted into the ground at the inner periphery of the tip of the casing pipe.
その後石炭灰スラリーをトレミーパイプを通じて地盤中
に圧入しつつ、ケーシングパイプとトレミーパイプとを
引き上げることで行う。After that, the coal ash slurry is forced into the ground through the tremie pipe, and the casing pipe and the tremie pipe are pulled up.
そしてトレミーパイプがケーシングパイプに密接するこ
とで、トレミーパイプからのスラリーの吐出圧が保たれ
る。またこの状態のままケーシングパイプとトレミーパ
イプとを引き上げることにより、スラリーの加圧が保持
された状態で地盤改良用柱状体が作製できるようにした
ものである。Since the tremie pipe is in close contact with the casing pipe, the discharge pressure of the slurry from the tremie pipe is maintained. Furthermore, by pulling up the casing pipe and the tremie pipe in this state, the columnar body for ground improvement can be produced while the slurry is kept pressurized.
以下この発明のスラリー充填方法を図示する実施例によ
って説明する。The slurry filling method of the present invention will be explained below with reference to illustrated embodiments.
この発明で使用されるトレミーパイプ１は、第１図に示
す如くケーシングパイプ２の内部に設けられていると共
に、ケーシングパイプ２の下端部内側に密接するパフカ
一部３が設けられて成っている。The tremie pipe 1 used in this invention is provided inside a casing pipe 2, as shown in FIG. .
なおこの実施例では、ケーシングパイプ２内に長尺の布
袋４が設置されており、トレミーパイプ１からのスラリ
ーは布袋４内に吐出される。In this embodiment, a long cloth bag 4 is installed inside the casing pipe 2, and the slurry from the tremie pipe 1 is discharged into the cloth bag 4.
またこの布袋４は、ケーシングパイプ２と、パッカ一部
３との間に密着して設けられており、布袋４の開口部が
パッカ一部３で塞がれた状態となっている。Further, this cloth bag 4 is provided in close contact between the casing pipe 2 and the packer part 3, and the opening of the cloth bag 4 is closed by the packer part 3.
次に以上のような構成からなるトレミーパイプ１を使用
しての本発明のスラリー充填方法を説明する。Next, a slurry filling method of the present invention using the tremie pipe 1 having the above structure will be explained.
まずトレミーパイプ１とケーシングパイプ２とを、改良
すべき地盤内へ同時に打ち込む。なおこの時にパッカ一
部３を空気圧または水圧にて拡径し、パッカ一部３．布
袋４．ケーシングパイプ２を密着させ、トレミーパイプ
１からのスラリー吐出圧が保たれるようにする。（第２
図参照）
次にこのトレミーパイプ１およびケーシングパイプ２の
所定深さまでの打ち込みが終了したら、トレミーパイプ
１から布袋４内へスラリーを吐出す。（第３図および第
４図参照）このスラリーの吐出しは、トレミーパイプ１
およびケーシングパイプ２を同時に引き上げながら行う
。そのため布袋４内にスラリーが充填された状態で地盤
内に残され、地盤改良用の柱状体として形成される。な
おこのスラリーの充填状態は、パフカ一部３によって布
袋４の開口部が塞がれているので、常に充填による加圧
が保持されて行われる。（第４図および第５図参照）
このようにしてスラリーの充填が行われるが、常に加圧
された状態なので、充填中に水分が入り込むようなこと
がなく、スラリー中の加圧脱水を確実に行える。First, the tremie pipe 1 and the casing pipe 2 are simultaneously driven into the ground to be improved. At this time, the diameter of the packer part 3 is expanded using air or water pressure, and the packer part 3 is expanded. Hotei 4. The casing pipe 2 is brought into close contact with the tremie pipe 1 so that the slurry discharge pressure from the tremie pipe 1 is maintained. (Second
(See figure) Next, when the tremie pipe 1 and the casing pipe 2 have been driven to a predetermined depth, the slurry is discharged from the tremie pipe 1 into the cloth bag 4. (See Figures 3 and 4) This slurry is discharged from the tremie pipe 1.
and while simultaneously pulling up the casing pipe 2. Therefore, the cloth bag 4 is left in the ground in a state filled with slurry, and is formed as a columnar body for soil improvement. The slurry is filled with the slurry while the opening of the cloth bag 4 is closed by the puffer part 3, so that the filling pressure is maintained at all times. (Refer to Figures 4 and 5) Slurry is filled in this way, but since it is always under pressure, moisture does not enter during filling, ensuring pressurized dehydration of the slurry. can be done.
そしてケーシングパイプ２の引き上げ速度と、スラリー
の圧送量とを調整することにより、所定の密度および脱
水が可能となる。また部分的な加圧充填が連続的に実施
されることにより、拡径された均質な柱状体が作製され
る。さらにケーシングパイプ２内に長尺の布袋４を設置
することにより、複数の柱状体の連続施工が可能となる
。By adjusting the pulling speed of the casing pipe 2 and the pumping amount of slurry, a predetermined density and dewatering can be achieved. Further, by continuously performing partial pressure filling, a homogeneous columnar body with an expanded diameter is produced. Furthermore, by installing a long cloth bag 4 inside the casing pipe 2, continuous construction of a plurality of columnar bodies becomes possible.
なおこの発明の充填方法は、前述した実施例のような垂
直方向打設時のみならず、水平方向打設においても使用
が可能であり、軟弱地盤処理工法にも使用可能である。The filling method of the present invention can be used not only for vertical pouring as in the embodiments described above, but also for horizontal pouring, and can also be used for soft ground treatment methods.
この発明による地盤改良用スラリーの充填方法は、まず
ケーシングパイプの先端部外周において、ケーシングパ
イプに密接するトレミーパイプを、地盤中に挿入する。In the method of filling slurry for soil improvement according to the present invention, first, a tremie pipe that is in close contact with the casing pipe is inserted into the ground at the outer periphery of the tip of the casing pipe.
またその後に石炭灰スラリーをトレミーパイプを通じて
地盤中に圧入しつつ、ケーシングパイプとトレミーパイ
プとを同時に引き上げることで行うことを特徴としてい
る。The method is characterized in that the coal ash slurry is then forced into the ground through the tremie pipe, and the casing pipe and the tremie pipe are pulled up at the same time.
そしてこの構成によれば、ケーシングパイプより拡径さ
れた同じ地盤改良用柱状体の作製を、常にスラリーの加
圧状態を維持しながら行うことができることとなる。According to this configuration, the same columnar body for ground improvement whose diameter is expanded from the casing pipe can be manufactured while always maintaining the pressurized state of the slurry.
そのためスラリーの均一充填が可能となるので、柱状体
における脱水を十分に行うことができると共に、所定の
密度による均質な柱状体を容易に作製することができる
。Therefore, it is possible to uniformly fill the slurry, so that the columnar bodies can be sufficiently dehydrated, and homogeneous columnar bodies with a predetermined density can be easily produced.
このことは、強度、密度等の品質が均一な地盤改良用の
柱状体を容易に作製することができるので、この柱状体
を使用した地盤を強固にすることができると共に、この
強固な地盤を安価に提供できることとなる。This means that columnar bodies for ground improvement with uniform quality such as strength and density can be easily produced, and the ground using these columnar bodies can be strengthened. This means that it can be provided at a low price.
第１図はこの発明方法に使用されるトレミーパイプのス
ラリー吐出し側端部を示す断面図、第２図〜第４図はこ
の発明によるスラリー充填方法を示す工程図、第５図は
第３図のＡ部拡大断面図である。
■・・・トレミーパイプ、２・・・ケーシングパイプ、
３・・・バッカ一部、４・・・布袋。
第１図
第３図 第４区 第５図FIG. 1 is a sectional view showing the slurry discharge side end of the tremie pipe used in the method of this invention, FIGS. 2 to 4 are process diagrams showing the slurry filling method according to the invention, and FIG. It is an enlarged cross-sectional view of part A in the figure. ■...Toremi pipe, 2...Casing pipe,
3... Part of Bakka, 4... Hotei. Figure 1 Figure 3 District 4 Figure 5
Claims (1)
グパイプに内接するトレミーパイプを、地盤中に挿入し
、 その後石炭灰スラリーをトレミーパイプを通じて地盤中
に圧入しつつ、ケーシングパイプとトレミーパイプとを
引き上げることを特徴とする地盤改良用スラリーの充填
方法。[Claims] A tremie pipe inscribed in the casing pipe is inserted into the ground at the inner periphery of the tip of the casing pipe, and then the casing pipe and the tremie pipe are injected into the ground through the tremie pipe while coal ash slurry is forced into the ground. A method for filling slurry for ground improvement, characterized by pulling up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7854588A JPH0617572B2 (en) | 1988-03-31 | 1988-03-31 | Ground improvement slurry filling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7854588A JPH0617572B2 (en) | 1988-03-31 | 1988-03-31 | Ground improvement slurry filling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01250516A true JPH01250516A (en) | 1989-10-05 |
| JPH0617572B2 JPH0617572B2 (en) | 1994-03-09 |
Family
ID=13664888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7854588A Expired - Lifetime JPH0617572B2 (en) | 1988-03-31 | 1988-03-31 | Ground improvement slurry filling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617572B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100685007B1 (en) * | 2004-08-04 | 2007-02-23 | 백경재 | Cement Paste Injection Apparatus And A Method Of Reinforcement For Soft Ground Using The Same |
| KR100730986B1 (en) * | 2004-07-27 | 2007-06-22 | 홍찬윤 | Method for reinforcing ground and apparatus for the same |
| JP6395238B1 (en) * | 2017-12-01 | 2018-09-26 | 強化土エンジニヤリング株式会社 | Ground reinforcement method and injection pipe device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100756524B1 (en) * | 2006-11-20 | 2007-09-10 | 홍찬윤 | Method for reinforcing ground and apparatus for the same |
| KR100811291B1 (en) * | 2007-04-09 | 2008-03-07 | 홍찬윤 | Method for reinforcing ground and apparatus for the same |
| KR100811287B1 (en) * | 2007-04-09 | 2008-03-07 | 홍찬윤 | Method for reinforcing ground and apparatus for the same |
| KR100811289B1 (en) * | 2007-04-09 | 2008-03-07 | 홍찬윤 | Method for reinforcing ground and apparatus for the same |
-
1988
- 1988-03-31 JP JP7854588A patent/JPH0617572B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100730986B1 (en) * | 2004-07-27 | 2007-06-22 | 홍찬윤 | Method for reinforcing ground and apparatus for the same |
| KR100685007B1 (en) * | 2004-08-04 | 2007-02-23 | 백경재 | Cement Paste Injection Apparatus And A Method Of Reinforcement For Soft Ground Using The Same |
| JP6395238B1 (en) * | 2017-12-01 | 2018-09-26 | 強化土エンジニヤリング株式会社 | Ground reinforcement method and injection pipe device |
| JP2019100083A (en) * | 2017-12-01 | 2019-06-24 | 強化土エンジニヤリング株式会社 | Ground reinforcing method and injection pipe device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617572B2 (en) | 1994-03-09 |
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