JPH01290817A - Work method for ground improvement - Google Patents
Work method for ground improvementInfo
- Publication number
- JPH01290817A JPH01290817A JP12031988A JP12031988A JPH01290817A JP H01290817 A JPH01290817 A JP H01290817A JP 12031988 A JP12031988 A JP 12031988A JP 12031988 A JP12031988 A JP 12031988A JP H01290817 A JPH01290817 A JP H01290817A
- Authority
- JP
- Japan
- Prior art keywords
- grounds
- ground
- soft
- underground continuous
- soil
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002689 soil Substances 0.000 abstract description 8
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000011150 reinforced concrete Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000009751 slip forming Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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の地盤改良工法に関するものである
。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a ground improvement method for soft ground.
最近では、都市周辺の軟弱地盤も宅地需要の高揚から造
成する場合が多い。Recently, soft ground around cities is often being developed due to the high demand for housing land.
又、軟弱地盤での盛り土造成に際し、周辺に既存建築物
がある場合、周辺への側方移動及び地盤沈下を防止する
目的で何らかの防護工を講する必要がある。Furthermore, when constructing an embankment on soft ground, if there are existing buildings in the vicinity, it is necessary to take some kind of protection work to prevent lateral movement to the surrounding area and ground subsidence.
従来、この種の防護工は縁切りの鋼矢板工法や杭状に打
設した深層混合処理工法によって行われている。Conventionally, this type of protection work has been carried out using the edge-cut steel sheet pile method or the deep mixing method where piles are driven.
しかしながら、この種の工法では、地盤の側方移動に対
して充分な抑止効果が有るかどうかが以前から問題にな
っている。However, with this type of construction method, there has long been a problem as to whether it has a sufficient deterrent effect against lateral movement of the ground.
この発明はこのような前記従来の問題点を解決する為に
開発されたもので、軟弱地盤の側方移動及地盤沈下を防
止することができる軟弱地盤の改良工法を提供すること
を目的とするものである。This invention was developed in order to solve the above-mentioned conventional problems, and its purpose is to provide a method for improving soft ground that can prevent lateral movement of soft ground and ground subsidence. It is something.
〔課題を解決するための手段］
この発明は軟弱地盤の改良工法に関するもので、軟弱地
盤中に地中連続壁を格子状に造成することにより前記目
的を達成するものである。[Means for Solving the Problems] The present invention relates to a construction method for improving soft ground, and achieves the above object by constructing underground continuous walls in a lattice shape in soft ground.
以下、この発明の施工方法を図示する一実施例によって
説明する。Hereinafter, the construction method of the present invention will be explained with reference to an illustrative embodiment.
軟弱地盤中に盛土外周の全体に亘って、平面−ヒ、格子
状に地中連続壁１を造成する。An underground continuous wall 1 is constructed in soft ground over the entire outer periphery of the embankment in a grid pattern on a plane.
地中連続壁１は原則として深層混合処理工法によって造
成するが、矢板工法や現場打ち鉄筋コンクリート工法等
の従来工法によって造成してもよい。In principle, the underground continuous wall 1 is constructed by the deep mixing method, but it may also be constructed by conventional methods such as the sheet pile method and the cast-in-place reinforced concrete method.
深層混合処理工法は自然状態にある土とスラリー状化し
た固化材を混合攪拌して地盤中に均一な固結柱体（ソイ
ルセメントコラム）を造成するもので、本願施工法では
固結柱体を一木一木単独に構築するのではなく連続して
造成することにより地中連続壁１とするものである。The deep mixing method creates uniform solidified columns (soil cement columns) in the ground by mixing and stirring soil in its natural state and solidified material in the form of slurry. Instead of constructing each tree individually, they are constructed continuously to form a continuous underground wall 1.
又、地中連続壁１の下端部は地中連続壁１と当該地中連
続壁１内の土が可能な限り剛体変形して地盤変位が小さ
くなる様に硬質地盤に貫入支持させるものとする。In addition, the lower end of the underground continuous wall 1 shall be supported by penetrating the hard ground so that the underground continuous wall 1 and the soil within the underground continuous wall 1 are deformed as rigidly as possible and ground displacement is reduced. .
更に、格子状に造成された地中連続壁１の升目の大きさ
は軟弱地盤の地質によって異なり、支持力が小さい程枡
目を小さくするものとし、同様に地中連続壁１の壁厚も
当然異なり、支持力が小さい程厚くするものとする。Furthermore, the size of the squares of the diaphragm wall 1 constructed in a lattice shape varies depending on the geology of the soft ground, and the smaller the bearing capacity, the smaller the square size, and similarly, the wall thickness of the diaphragm wall 1 also naturally varies. , the smaller the supporting force, the thicker it is.
地中連続壁１を単に一方向に連続して造成するのではな
く格子状に造成することにより地中連続壁ｌと当該地中
連続壁１内の軟弱土が一体となった重力式の剛な壁体に
よって地盤の滑りや側方流動を防止することができる。By constructing the underground continuous wall 1 in a lattice pattern rather than simply continuously in one direction, the underground continuous wall 1 and the soft soil within the underground continuous wall 1 are integrated into a gravity-type rigid structure. The walls can prevent ground slippage and lateral flow.
又、側方荷重は壁体に剪断力として作用するが、この剪
断力に抵抗する地中連続壁１とこれと直角方向の地中連
続壁１とを一体的に造成することにより軟弱土のすり抜
は防止と壁体の一体化、曲げ、剪断剛性の確保及び地盤
反力の低減を図ることができる。In addition, the lateral load acts on the wall as a shearing force, but by integrally constructing the underground continuous wall 1 that resists this shearing force and the underground continuous wall 1 in the direction perpendicular to this, it is possible to reduce the strength of soft soil. It is possible to prevent slippage, integrate the wall, ensure bending and shear rigidity, and reduce ground reaction force.
この発明は以上の構成からなるので以下の効果を有する
。Since the present invention has the above configuration, it has the following effects.
地中連続壁は単に軟弱地盤中に単に一方向に連続して造
成するのではなく格子状に造成する為、地中連続壁と当
該地中連続壁内の軟弱土が一体となった重力式の剛な壁
体によって地盤の滑りや側方流動を確実に防止すること
ができるものである。The underground continuous wall is not simply constructed continuously in one direction in the soft ground, but in a lattice pattern, so the underground continuous wall and the soft soil within the underground continuous wall are integrated into a gravity type. The rigid walls can reliably prevent ground slippage and lateral flow.
第１図及び第２図はこの発明に係る改良地盤を示したも
ので、第１図はその一部平面図第２図はその横断面図で
ある。
１・・・地中連続壁、２・・・軟弱地盤。Figures 1 and 2 show the improved ground according to the present invention, with Figure 1 being a partial plan view and Figure 2 being a cross-sectional view thereof. 1... underground continuous wall, 2... soft ground.
Claims (1)
特徴とする軟弱地盤の地盤改良工法。1. A ground improvement method for soft ground, which is characterized by constructing underground continuous walls in a lattice pattern in soft ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12031988A JPH01290817A (en) | 1988-05-17 | 1988-05-17 | Work method for ground improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12031988A JPH01290817A (en) | 1988-05-17 | 1988-05-17 | Work method for ground improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01290817A true JPH01290817A (en) | 1989-11-22 |
Family
ID=14783305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12031988A Pending JPH01290817A (en) | 1988-05-17 | 1988-05-17 | Work method for ground improvement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01290817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124317A (en) * | 1990-09-17 | 1992-04-24 | Kajima Corp | Improvement of foundation ground for building |
| JP2007046343A (en) * | 2005-08-10 | 2007-02-22 | Takenaka Komuten Co Ltd | Liquefaction preventive construction method of ground just under existing building |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996320A (en) * | 1982-11-19 | 1984-06-02 | Onoda Cement Co Ltd | Improvement of soft ground |
| JPS615114A (en) * | 1984-06-20 | 1986-01-10 | Takenaka Komuten Co Ltd | Ground improvement work for preventing liquefaction |
-
1988
- 1988-05-17 JP JP12031988A patent/JPH01290817A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996320A (en) * | 1982-11-19 | 1984-06-02 | Onoda Cement Co Ltd | Improvement of soft ground |
| JPS615114A (en) * | 1984-06-20 | 1986-01-10 | Takenaka Komuten Co Ltd | Ground improvement work for preventing liquefaction |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124317A (en) * | 1990-09-17 | 1992-04-24 | Kajima Corp | Improvement of foundation ground for building |
| JP2007046343A (en) * | 2005-08-10 | 2007-02-22 | Takenaka Komuten Co Ltd | Liquefaction preventive construction method of ground just under existing building |
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