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Fundamental Study on Preventive Measures of Slope Failure and Reinforcement Method for the Bearing Capacity of Granular Assemblies

边坡破坏防治措施及粒状组合体承载力加固方法基础研究

基本信息

批准号：
07555154
负责人：
MATSUOKA Hajime
金额：
$ 3.01万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

1) Mechanism and Preventive Measures of Slope FailureMany model tests of granular soil slope have been conducted to study the failure mechanism and effective reinforcement of granular soil slope. It was found that the granular soil slope behaves as the surface failure not circular slip failure while the slope of soil with cohesion behaves as circular slip failure. The angle of granular soil slope at failure is almost equal to the internal friction angle. The angle of the slope of soil with cohesion at failure is almost equal to that obtained by as circular slip method. The results of model tests also show that if the "trigger" of the failure is improved, the reinforcement method is very effective.2) Reinforcement Method for the Bearing Capacitya) The simulation on the bearing capacity test of the footing improved by "soilbag" was conducted to study the mechanism of this improvement method. The reason why the bearing capacity increases by using "soilbag" and the relation between the bearing capacity and tension of the "soilbag" have been found out.b) The reinforcing method by means of wrapping up a part of the soil foundation has been introduced to increase the bearing capacity of the foundation. The model tests of the bearing capacity on aluminum rods and real soils improved by "soilbag" and the full scale model tests of the bearing capacity on ballast foundation through the railway sleeper under dynamic and static load have conducted to study the effects of "soilbag" in improvement of soil foundation. The test results show the bearing capacity of the foundation increases greatly and the deformation of the railway sleeper and ballast foundation decreases after wrapping up a part of foundation.

1)边坡失稳机理及防治措施为了研究散粒土边坡的失稳机理和有效加固措施，进行了大量的散粒土边坡模型试验。结果表明，颗粒土边坡的破坏形式为表面破坏而非圆弧滑动破坏，而粘性土边坡的破坏形式为圆弧滑动破坏。散粒土边坡的破坏角几乎等于内摩擦角。有粘聚力的土体破坏时的坡角与圆弧滑动法所得的坡角基本相同。模型试验结果也表明，若能改善破坏的“触发点”，该加固方法是非常有效的。2）承载力加固方法a）对“土袋”加固地基的承载力试验进行模拟，研究该加固方法的加固机理。找出了采用“土袋”提高地基承载力的原因，以及“土袋”的承载力与拉力的关系。B）介绍了采用包裹部分地基的加固方法，提高地基承载力。为研究“土袋”加固软土地基的效果，进行了“土袋”加固铝筋和真实的土的承载力模型试验以及动、静荷载作用下穿越铁路轨枕的碎石基础承载力足尺模型试验。试验结果表明，包裹部分地基后，地基承载力大大提高，轨枕和道床基础的变形减小。