土的三轴多向渗透试验装置的研制  

Development of triaxial seepage test equipment for soil

作　　者：雷红军[1] 孙逊[1] 卞锋[1] 于玉贞[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室

出　　处：《实验技术与管理》2009年第6期55-57,共3页Experimental Technology and Management

基　　金：国家自然科学基金资助项目(50879039);国家自然科学基金资助项目(50779024);水利部岩土力学与工程重点实验室开放基金项目(G07-05)

摘　　要：在三轴剪切仪的基础上改造底座及顶帽，并增加三向渗透管路系统，研制了三轴多向渗透试验装置。该试验装置可以实现土样剪切过程中3个方向中任意一个方向的渗透，测定试样在不同应力应变状态下3个方向的渗透系数，用以揭示饱和土发生大剪切变形过程中的渗透特性变化规律。对某高土石坝心墙黏土的实际应用表明，该试验装置改造方便，操作简单，测量精度高，可在实验室中推广应用。A triaxial seepage test equipment is developed to measure the permeability of saturated soil in laboratory. By measuring coefficient of permeability of soil samples under different stress and strain states, this system can be used to reveal the permeable behavior of saturated soil during large shear deformation process. Its application to soil of an actual project shows that this test system is easy to operate and its accuracy is high, which can be extended and applied in laboratories.

关 键 词：三轴渗透 大剪切变形 渗透系数 轴向应变 围压 

分 类 号：TU415[建筑科学—岩土工程] TU43[建筑科学—土工工程]