期刊论文

Key Issues and Research Progress of Shear Strength Theory of Unsaturated Soil

中文

中国公路学报

1001-7372

2018

31

2

1-14

10.19721/j.cnki.1001-7372.2018.02.001

51508040:国家自然科学基金 51508079:国家自然科学基金 51678074:国家自然科学基金 51378082:国家自然科学基金 2016SK2023:湖南省重点研发计划项目 17B013:湖南省教育厅优秀青年项目 CX2016B384:湖南省研究生科研创新项目

本校为第一机构

非饱和土抗剪强度与其矿物组成、细观结构和含水率等因素密切相关,许多学者先后提出了多种非饱和土抗剪强度的形成机理、计算方法以及测试手段。为总结现有研究成果,深化对非饱和土抗剪强度理论的认知,综述了非饱和土抗剪强度理论发展中的若干关键问题。首先讨论了不同类型土体的细观结构差异,分析了非饱和土抗剪强度形成的细观机理,对比分析了砂性土与黏性土非饱和抗剪强度变化规律的差异性;其次总结了几种较为典型的非饱和土抗剪强度计算公式,对不同非饱和参数的取值方法进行了分析;最后介绍了多种用于非饱和土抗剪强度测试的新仪器与新方法,如非饱和土直剪、非饱和三轴以及非饱和土环剪装置等...

The shear strength of unsaturated soil was closely related to the mineral composition,mesoscopic structure and water content.Many scholars have proposed varieties of formation mechanism,calculation methods and testing methods of the shear strength of unsaturated soil.In order to summarize the existing research results and deepen the cognition of the shear strength theory of unsaturated soil,some key problems in the development of the shear strength theory of unsaturated soil were reviewed.First of all,the microstructure differences of different unsaturated soils were discussed and the micro me...