三轴试验中非饱和土试样吸力的量测  

Neasurement of Change in Suction on Unsaturated Soils during TriaXial Test

作　　者：刘国楠[1] 冯满[1] 

机构地区：[1]铁道部科学研究院铁建所

出　　处：《岩土工程学报》1994年第5期11-15,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金

摘　　要：本文作者改装了常规三轴仪使之能量测非饱和土试样的孔隙水压力和控制孔隙气压力，并与轴移技术所测得的吸力进行了对比验证。利用这种改装的仪器和轴移技术，进行了一组非饱和土试样的排气常含水量三轴剪切试验，量测出剪切过程中的吸力变化值，试验中发现围压和剪切应变对试样的吸力均有较大影响。A Conventional triaxial cell was modified in order to measure the pore water pressure and tocontrol the pore air pressure on unsaturated soil specimens,The results were compared and checkedwith those obtained by the“axial translation technique”.The measurement of the change in suction wasperformed in air drained triaxial shear tests with the modified cell and“axial translation technique”.ItiS found that suctions in the specimen are considerably influenced by the cell pressure and shearingstrain.

关 键 词：土试样吸力 饱和土 吸力量测 三轴试验 三轴仪 

分 类 号：TU411.99[建筑科学—岩土工程]