慢速往复荷载下饱和砂土变形特性试验研究  

Study on Deformation Behaviours of Saturated Soil under Slow Reciprocating Loading

作　　者：孔亮[1] 段建立[2] 郑颖人[2] 

机构地区：[1]宁夏大学物电系,宁夏银川750021 [2]后勤工程学院军事土木工程系,重庆400041

出　　处：《工程勘察》2001年第5期1-4,共4页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金资助项目 (196 72 0 73);宁夏大学科研基金资助项目 (0 12 110 )

摘　　要：慢速往复荷载作用下土变形特性的研究不多见 ,但实际工程中土受到慢速往复荷载作用的例子很多。本文在先进的GDS应力路径三轴仪上对饱和砂土进行等围压不同周期的慢速往复荷载排水三轴试验。根据试验结果分析了饱和砂土在慢速往复荷载下的应力应变特性 ,并对饱和砂土的新特性 -卸载体缩特性进行了探讨 。Study on deformation behaviours of soil under slow reciprocating loading is not often seen but in practical engineering there are many examples of such case.Consolidated drained triaxial tests are conducted for the saturated sand under slow reciprocating loading by the advanced GDS stress path triaxial apparatus. The stress\|strain properties of saturated sand under slow reciprocating loading are analyzed and the volumetric contraction after unloading is explored based on test results. Some useful conclusions are achieved.

关 键 词：饱和砂土 慢速往复荷载 应力应变 卸载体缩 变形 试验 

分 类 号：TU441.4[建筑科学—岩土工程]