重塑非饱和粘土抗剪强度参数与饱和度的关系研究  

Study on relation of shear strength parameters with saturation of remolded unsaturated cohesive soil

作　　者：熊承仁[1,2] 刘宝琛[1] 张家生[1] 刘多文[3] 

机构地区：[1]中南大学 [2]湖南科技大学土木系,湘潭411201 [3]湖南省交通规划勘察设计院

出　　处：《岩土力学》2003年第S2期195-198,共4页Rock and Soil Mechanics

摘　　要：土的饱和度是基于水分状态和密度状态的一个衍生变量。存在因应水分状态变化和因应密度状态变化的两类饱和度变化过程。根据23组不同水分状态和密度状态的UU三轴压缩试验结果,讨论了重塑非饱和粘性土抗剪强度参数与饱和度的关系。数据分析表明:粘聚力与水分状态相关的饱和度的关系是强非线性的,与密度状态相关的饱和度的关系是准线性的。内摩擦角与水分状态相关的饱和度的关系是强非线性的,与密度状态相关的饱和度的关系是弱非线性的。Saturation is derived from water content and dry density of soil. There are two patterns of varying process of saturation that one is related with varation of moisture state and another is related with density state. 23 groups UU triaxial compression tests with experimental specimens in six different moisture states and four density states were conducted accord to five classes of surround pressure as 100 kPa, 200 kPa, 300 kPa, 450 kPa and 600 kPa. Experimental results show that shear strength parameters of remolded unsaturated cohesive soil vary regularly in certain extent with saturation but are not available to be presented by one or two simple functions. Cohesion has a strong nonlinear relation with moisture state related saturation and a quasi-linear relation with density state related saturation respectively. Internal friction angle has a strong nonlinear relation with moisture state related saturation and a weak nonlinear relation with density state related saturation respectively.

关 键 词：重塑非饱和粘性土 三轴压缩试验 抗剪强度参数 水分状态 密度状态 特征饱和度 

分 类 号：TU442[建筑科学—岩土工程]