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，必须采用特殊的基础形式。因此，端承桩基础在工程实践中得到了广泛的应用，但也存在着桩侧负摩阻力、不均匀沉降等问题。本研究以端承桩为基础，对以下几种基础形式进行了理论和试验研究：（1）摩擦桩基础法，其是主要通过桩表面和粘性土之间的摩擦强度来支撑载荷的方法，（2）稳定箱基础法，其是通过现场施工来制造倒置箱的方法，沿箱的周边沿着重叠稳定土柱，并制作稳定土顶板，使结构支承在箱上，（3）轻质地基法，即通过将粘土与膨胀聚苯乙烯和生石灰混合，使地基本身重量变轻的方法。根据结果，结果表明，这三种地基处理方法对有明软土地基上的支护结构都有较好的效果，在提高承载力的同时，还能减小总沉降和不均匀沉降。

项目成果

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。

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）。

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。

甲本達也: "軟弱地盤における箱型基礎の支持力機構" 農業土木学会論文集. 159. 53-56 (1992)

Tatsuya Komoto：“软土地基中箱型基础的支撑能力机制”日本农业和土木工程师学会学报 159. 53-56 (1992)。