【摘要】 在施工开挖过程中 ,非饱和土的强度参数会发生变化 ,而在设计中多采用原状土的各项力学指标 ,这必然会带来一定的误差。为了解决这个问题 ,采用了三轴试验 ,通过对非饱和土施工时的应力路径的模拟 ,研究了由于基坑开挖所产生的扰动对土体的强度参数 (粘聚力和内摩擦角 )的影响 ,以及这两个强度参数的变化特性。并在此基础上分析了这些现象的原因。更多还原

【Abstract】 During construction,intensity parameters of unsaturated soil have some changes,but some mechanical indexes of original stated soil are adopted in design,which must be bring about some errors.In order to resolve this problem,Some triaxial tests to simulate the practical stress paths of unsaturated soil are introduced,the affection and changed properties of cohesion and inner frictional angle of unsaturated soil disturbed by construction is researched.On the basis of research,the reasons of these changes is analyzed.更多还原