JPH0559717A - Structure for improved ground section - Google Patents
Structure for improved ground sectionInfo
- Publication number
- JPH0559717A JPH0559717A JP22409391A JP22409391A JPH0559717A JP H0559717 A JPH0559717 A JP H0559717A JP 22409391 A JP22409391 A JP 22409391A JP 22409391 A JP22409391 A JP 22409391A JP H0559717 A JPH0559717 A JP H0559717A
- Authority
- JP
- Japan
- Prior art keywords
- improved ground
- improved
- section
- ground portion
- ground section
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、軟弱地盤の上に建つ
構造物直下の改良地盤部の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an improved ground portion directly below a structure built on soft ground.
【０００２】[0002]
【従来の技術】一般に、軟弱地盤はせん断破壊や側方流
動および圧密による地盤沈下などの被害を起こすおそれ
がある。このため、軟弱地盤の上に建つ建物は支持杭工
法などによって支持層に支持されている。2. Description of the Related Art Generally, a soft ground may cause damage such as shear failure, ground flow, and subsidence due to consolidation. For this reason, the building built on the soft ground is supported by the support layer by the support pile method.
【０００３】[0003]
【発明が解決しようとする課題】この種の従来の軟弱地
盤部の構造は、前記のように構成されているため、支持
層がきわめて深い場合や、構造物の規模が比較的小さ
く、小規模な構造物の場合には、支持杭工法を採用する
と杭の工事費の占める割合が高くなってきわめて不経済
になるという課題があった。Since the structure of the conventional soft ground portion of this kind is constructed as described above, when the supporting layer is extremely deep or the scale of the structure is relatively small, the scale is small. In the case of various structures, there was a problem that if the support pile method was adopted, the construction cost of the pile would be high and it would be extremely uneconomical.
【０００４】この発明は、このような前記従来の課題を
解決するために提案されたもので、短期施工および経済
施工を可能にした改良地盤部の構造を提供することを目
的とする。The present invention has been proposed in order to solve the above-mentioned conventional problems, and an object thereof is to provide a structure of an improved ground portion which enables short-term construction and economical construction.
【０００５】[0005]
【課題を解決するための手段】この発明にかかる改良地
盤部の構造は、構造物直下の軟弱地盤中に、ソイルセメ
ントを使用した深層混合攪拌処理工法による列柱式の改
良地盤部が造成され、かつ、この改良地盤部の下端面が
中央部より周辺方向に徐々に深くなるような階段状若し
くはアーチ状に造成されている。The structure of the improved ground portion according to the present invention is constructed such that the column-column type improved ground portion is formed in the soft ground directly under the structure by the deep mixing agitation processing method using soil cement. Further, the lower end surface of the improved ground portion is formed in a stepped shape or an arched shape such that the lower end surface gradually becomes deeper in the peripheral direction than the central portion.
【０００６】また、この階段状若しくはアーチ状の角度
ａ°（勾配）は、土質の性状、つまり、内部摩擦角を考
慮し、最も合理的な角度にすることによってより効果的
な改良形状を実現できる（図２参照）。Further, this stepwise or arched angle a ° (gradient) takes into consideration the nature of the soil, that is, the internal friction angle, and makes it the most rational angle to realize a more effective improved shape. Yes (see Figure 2).
【０００７】[0007]
【作用】この発明にかかる軟弱地盤部の構造は、前記の
ように造成されていることにより、荷重の伝達・分散が
図れるともに非改良部を閉塞することにより改良部との
一体化が計れる。また、杭基礎よりもはるかに経済施工
が可能となる。Since the structure of the soft ground portion according to the present invention is constructed as described above, the load can be transmitted / distributed and the non-improved portion can be closed to integrate with the improved portion. It also enables much more economical construction than pile foundations.
【０００８】[0008]
【実施例】図１および図２は、この発明にかかる改良地
盤部の構造の一実施例を示すもので、構造物の基礎底版
１の直下の軟弱地盤中にソイルセメントを使用した深層
混合攪拌処理工法による柱列式の改良地盤部２が造成さ
れている。1 and 2 show an embodiment of the structure of the improved ground portion according to the present invention, in which deep cement mixing using soil cement in the soft ground immediately below the foundation bottom slab 1 of the structure is carried out. A post-column type improved ground portion 2 is constructed by a treatment method.
【０００９】改良地盤部２の下端面は構造物の荷重Ｗを
軟弱地盤中に広く分散できるように階段状若しくはアー
チ状（図省略）に造成されている。The lower end surface of the improved ground portion 2 is formed in a step shape or an arch shape (not shown) so that the load W of the structure can be widely dispersed in the soft ground.
【００１０】さらに、構造物の建築面積が広いために基
礎底版１が広い場合には、改良地盤部２は平面的に見て
複数部分に格子状に区画され、そのそれぞれの下端面が
階段状若しくはアーチ状に造成されている。Further, when the foundation floor slab 1 is wide due to the large construction area of the structure, the improved ground portion 2 is divided into a plurality of portions in plan view, and the lower end surface of each of them is stepped. Or it is constructed in an arch shape.
【００１１】改良地盤部がこのように造成されているこ
とにより、構造物の荷重Ｗを軟弱地盤中に広く分散させ
ることができるとともに、斜め下方向に伝達させること
ができ、しかも、改良されない中央の地盤の拘束力が高
められ、一体化した複合基礎地盤とすることがてきる。Since the improved ground portion is constructed in this manner, the load W of the structure can be widely dispersed in the soft ground and can be transmitted obliquely downward, and the central area which is not improved. The restraining force of the ground is improved, and it is possible to make an integrated composite ground.
【００１２】[0012]
【発明の効果】この発明は、以上説明したように構成さ
れているため、以下に記載されるような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００１３】地盤改良部のアーチ効果により、荷重の伝
達・分散を図るとともに非改良部を拘束することにより
改良部との一体化が計れ、構造物を確実に支持すること
ができる。また、杭基礎よりも短期間のうちに施工が可
能であり、また、はるかに経済的に施工することができ
る。Due to the arch effect of the ground improvement part, the load can be transmitted and distributed, and the non-improved part can be restrained to be integrated with the improved part, so that the structure can be reliably supported. Further, it can be constructed in a shorter period of time than the pile foundation, and can be constructed much more economically.
【図１】この発明にかかる構造物の改良地盤部の平面図
である。FIG. 1 is a plan view of an improved ground portion of a structure according to the present invention.
【図２】この発明にかかる構造物の改良地盤部の縦断面
図である。FIG. 2 is a vertical cross-sectional view of an improved ground portion of the structure according to the present invention.
１…構造物の基礎底版、２…改良地盤部。 1 ... Foundation bottom plate of structure, 2 ... Improved ground part.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉松 敏行 東京都港区元赤坂１丁目２番７号 鹿島建 設株式会社内 (72)発明者 近藤 信光 東京都世田谷区代沢２丁目18番11号 (72)発明者 山田 治夫 東京都墨田区八広１−32−７ 石渡ビル 402号 (72)発明者 甲本 達也 佐賀県佐賀市本庄町１ ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Toshiyuki Yoshimatsu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. No. (72) Haruo Yamada Inventor Haruo Yamada 1-32-7 Yahiro, Sumida-ku, Tokyo No. 402 Ishiwata Building (72) Inventor Tatsuya Komoto 1 Honjocho, Saga City, Saga Prefecture
Claims (2)
ントを使用した深層混合攪拌処理工法による列柱式の改
良地盤部を造成し、かつ、この改良地盤部の下端部を中
央部より周辺方向に徐々に深くなるような階段状若しく
はアーチ状に造成したことを特徴とする改良地盤部の構
造。1. A columnar type improved ground portion is formed in a soft ground just below a structure by a deep mixing agitation treatment method using soil cement, and the lower end portion of the improved ground portion is surrounded by the central portion. The structure of the improved ground is characterized by being formed in a stepped shape or an arched shape that gradually becomes deeper in the direction.
そのそれぞれの下端面を中央部より周辺方向に徐々に深
くなるような階段状若しくはアーチ状に造成したことを
特徴とする請求項第１項記載の改良地盤部の構造。2. The improved ground portion is divided into a grid in a plan view,
The structure of the improved ground portion according to claim 1, wherein each of the lower end surfaces thereof is formed in a stepped shape or an arched shape that gradually becomes deeper in the peripheral direction than the central portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3224093A JP2539119B2 (en) | 1991-09-04 | 1991-09-04 | Structure of improved ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3224093A JP2539119B2 (en) | 1991-09-04 | 1991-09-04 | Structure of improved ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0559717A true JPH0559717A (en) | 1993-03-09 |
| JP2539119B2 JP2539119B2 (en) | 1996-10-02 |
Family
ID=16808439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3224093A Expired - Fee Related JP2539119B2 (en) | 1991-09-04 | 1991-09-04 | Structure of improved ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2539119B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073305A (en) * | 2000-08-18 | 2001-03-21 | Tenox Corp | Road construction body |
| JP2008038411A (en) * | 2006-08-03 | 2008-02-21 | Kajima Corp | Structure of arch-shaped improved ground and its construction method |
| JP2010106545A (en) * | 2008-10-30 | 2010-05-13 | Railway Technical Res Inst | Method of constructing foundation structure in structure, and foundation structure |
| JP2010106544A (en) * | 2008-10-30 | 2010-05-13 | Railway Technical Res Inst | Method of constructing foundation in structure, and foundation structure |
| JP2010106546A (en) * | 2008-10-30 | 2010-05-13 | Railway Technical Res Inst | Method of constructing foundation in structure, and foundation structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037324A (en) * | 1983-08-08 | 1985-02-26 | Hidesuke Ito | Ground improvement work |
| JPS60199112A (en) * | 1984-03-21 | 1985-10-08 | Toa Harbor Works Co Ltd | Ground improvement work by deep layer mixing treatment of cement |
| JPS61109820A (en) * | 1984-11-05 | 1986-05-28 | Mitsubishi Heavy Ind Ltd | Soft ground improver |
| JPH02108722A (en) * | 1988-10-14 | 1990-04-20 | Shimizu Corp | Weak ground improving technique |
-
1991
- 1991-09-04 JP JP3224093A patent/JP2539119B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037324A (en) * | 1983-08-08 | 1985-02-26 | Hidesuke Ito | Ground improvement work |
| JPS60199112A (en) * | 1984-03-21 | 1985-10-08 | Toa Harbor Works Co Ltd | Ground improvement work by deep layer mixing treatment of cement |
| JPS61109820A (en) * | 1984-11-05 | 1986-05-28 | Mitsubishi Heavy Ind Ltd | Soft ground improver |
| JPH02108722A (en) * | 1988-10-14 | 1990-04-20 | Shimizu Corp | Weak ground improving technique |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073305A (en) * | 2000-08-18 | 2001-03-21 | Tenox Corp | Road construction body |
| JP2008038411A (en) * | 2006-08-03 | 2008-02-21 | Kajima Corp | Structure of arch-shaped improved ground and its construction method |
| JP2010106545A (en) * | 2008-10-30 | 2010-05-13 | Railway Technical Res Inst | Method of constructing foundation structure in structure, and foundation structure |
| JP2010106544A (en) * | 2008-10-30 | 2010-05-13 | Railway Technical Res Inst | Method of constructing foundation in structure, and foundation structure |
| JP2010106546A (en) * | 2008-10-30 | 2010-05-13 | Railway Technical Res Inst | Method of constructing foundation in structure, and foundation structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2539119B2 (en) | 1996-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960604 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |