Research on the Foundation Method for Soft Ariake Clay

软质有明粘土地基方法研究

• 批准号: 04556034
• 负责人: KOUMOTO Tatsuya
• 金额: $ 3.2万
• 依托单位: Saga University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04556034/
• 关键词: Bearing Capacity; Clay; Expanded Poly-Styrol; Finite Element Method; Friction Plie; Quick Lime; Settlement; Soil Cement; Stabilization; 有限要素解析

In the case of construction on soft ground, some special type of foundation must be used. So for the end bearing pile foundation has been mostly used.However, in the case of such a foundation, some problems have also been pointed out like negative skin friction of the piles and differential settlement.In this research, instead of the end bearing pile, the following foundation methods have been theoretically and experimentally investigated : (1) a friction pile foundation method which is a method of supporting a load by mainly frictional strength between pilesurface and cohesive soil, (2) a stabilized box foundation method which is a method of making an inverted box by constructing in situ, overlapping columns of stabilized soil along the periphery of the box and making a top slab of stabilized soil so that the structure is supported on the box, (3) a light weight foundation method which is a method of making the weigth of foundation itself light by mixing clay with expanded Poly-Styrol and quick lime.According to the results, these three kinds of foundation methods are found to be fairly useful for supporting structures in soft Ariake clay.These methods also reduce the total and differential settlement while the bearing capacity is increased.

在软土地基上施工时，必须使用某种特殊类型的基础。因此，目前大多采用端承桩基础。然而，在这种基础的情况下，也指出了一些问题，如桩的负表面摩擦力和不均匀沉降。在本研究中，而不是端承桩桩，对以下地基方法进行了理论和实验研究：（1）摩擦桩基础法，主要通过桩面与粘性土之间的摩擦力来支撑荷载的方法，（2）稳定箱基础法，这是一种主要通过桩面与粘性土之间的摩擦力来支撑荷载的方法。制作一个倒立的箱体的构造方法是在箱体周边现场建造重叠的稳定土柱，并制作稳定土顶板，以便将结构支撑在箱体上，（3）轻质基础法，这是一种制作箱体的方法通过将粘土与膨胀聚苯乙烯和生石灰混合，可以减轻基础本身的重量。根据结果，发现这三种基础方法对于软质有明粘土的支撑结构相当有用。这些方法还减少了总和差异沉降同时承载力增加了。

项目成果

坂井 晃 甲本達也: "有限要素法解析による軟弱地盤上箱型基礎工法の有効性について" 低平地研究佐賀大学低平地防災研究センター. 3. (1994)

Akira Sakai和Tatsuya Komoto：“利用有限元分析探讨软土地基上箱式基础施工方法的有效性”低洼地研究佐贺大学低洼地防灾研究中心3.（1994年）。

Norihiko MIURA,Wenjing WU,Madhira R.MADHAV,Seiichi NAGAIKE: "Settlement Behavior and Bearing Capacity of Piled Raft Foundation" Rep. Fac. Sci. Engrg. Saga Univ.22. 143-149 (1993)

Norihiko MIURA、Wenjing WU、Madhira R.MADHAV、Seiichi NAGAIKE：“桩筏基础的沉降行为和承载力”Rep. Fac。

Mashalah KHAMEHCHIYAN,Yushiro IWAO: "GEOTECHNICAL PROPERTIES OF ARIAKE CLAY IN SAGA PLAIN-JAPAN" J.of Geotech.Eng.505, III-29. 11-18 (1994)

Mashalah KHAMEHCHIYAN，Yushiro IWAO：“日本佐贺平原 ARIAKE 粘土的岩土工程特性”J.of Geotech.Eng.505，III-29。

Tatsuya KOUMOTO: "Bearing Capacity Mechanism of a Stabilized Box Foundation on Soft Clay" Trans.JSIDRE. 159. 53-56 (1992)

Tatsuya KOUMOTO：“软粘土上稳定箱形基础的承载力机制” Trans.JSIDRE。

Tatsuya KOUMOTO,Yasutaka OTSUKA,Nobumitsu KONDO: "Effect of Stabilized Box Foundattion due to a Decrease in the Settlement of the Structure on Soft Ariake Clay" Trans. JSIDRE. 161. 85-89 (1992)

Tatsuya KOUMOTO、Yasutaka OTSUKA、Nobumitsu KONDO：“由于软有明粘土上结构沉降的减少而导致稳定箱基础的影响”Trans。