造孔损伤重塑膨胀土三轴剪切试验研究  

Triaxial Shear Test of Pore-Damaged Remolded Expansive Soil

作　　者：汪时机[1,2] 孙世军[2] 陈正汉[1] 彭贞[2] 蒋运忠[2] 王云亮[2] 

机构地区：[1]中国人民解放军后勤工程学院,重庆400041 [2]西南大学工程技术学院,重庆400716

出　　处：《西南大学学报（自然科学版）》2011年第3期128-132,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10902091);中国博士后科学基金资助项目(20090450202);重庆市自然科学基金资助项目(2009BB8114);国家大学生创新性实验计划(091063544)

摘　　要：研究了造孔损伤重塑膨胀土的变形及强度特性,着重探讨了孔洞对非饱和重塑膨胀土性质的影响.共进行了8个重塑膨胀土试样的三轴剪切试验,即控制吸力和净围压为常数的非饱和土三轴排水剪切试验.试验结果表明,由于孔洞改变了试样内部结构,有孔试样破坏所需偏应力明显要比常规试样小.A series of triaxial shear tests with controlled suction and net constant confining pressure were conducted to study the effects of pore structure on the deformation and strength of unsaturated remolded expansive soil.The results showed that the deviatoric stress for the failure of the pored sample was markedly less than that of the conventional sample due to the changes in the internal structure of the test sample induced by the presence of pores.

关 键 词：重塑膨胀土 三轴剪切实验 孔洞结构 应力-应变关系 

分 类 号：TU411[建筑科学—岩土工程]