人民长江Issue(7)：94-97,4.
粗粒土CT三轴湿化变形试验研究
Triaxial wetting deformation study of coarse-grained soil by CT
摘要
Abstract
The wetting deformation of coarse-grained soil is of great importance to deformation and stability of earth-rockfill dam. CT triaxial wetting test was conducted to study the micro deformation mechanism of coarse-grained soil. The test result shows that the particle is softened and lubricated when water immerses the dry and stable soil under a certain axial stress condi-tion. The particle contact status changes from stable status to an unstable status, during which the particle continuously generates dislocation and movement until every single particle has a relatively large contact area. The final result of particle adjustment is that the porosity reduces and vertical deformation increases. Due to the strength reduction by softening and lubricating effect is greater than the strength gain by compacting effect, the strength of coarse-grained soil decreases after wetting, thus exerting un-favorable effect on dam safety.关键词
粗粒土/应力应变关系/CT三轴试验/颗粒运动/湿化变形Key words
coarse-grained soil/stress-strain relationship/triaxial CT test/particle movement/wetting deformation分类
建筑与水利引用本文复制引用
姜景山,程展林,卢文平..粗粒土CT三轴湿化变形试验研究[J].人民长江,2014,(7):94-97,4.基金项目
本文得到南京工程学院校级科研基金项目的资助(YKJ201330)。 （YKJ201330）
