岩土力学2018，Vol.39Issue(3)：926-932,7.DOI:10.16285/j.rsm.2016.0745
考虑排水条件和粗料含量的砂砾石土动残余变形特性
Dynamic residual deformation characteristics of saturated gravel soil considering drainage condition and coarse grain content
摘要
Abstract
A series of laboratory tests is performed to study the influence of drainage condition and coarse grain content on the dynamic residual deformation characteristics of the saturated gravel soil.Extensive tests are carried out under no-drainage,single-drainage and double-drainage conditions respectively,by using the improved GDS cyclic triaxial testing system.The gravel soil samples consist of five different gradations.The results indicate that,the dynamic residual shear strain is dominated by both the coarse grain content (the content of coarse particles,whose diameters are bigger than 5 mm) and the drainage condition.The residual shear strain significantly decreases as the coarse grain content and the number of drainage surfaces increase.When the number of the cyclic loading reaches 30,the dynamic residual shear strain under the no-drainage condition is 2-3 times that under the single-drainage condition,and 4-9 times that under the double-drainage condition.However,the dynamic residual volumetric strain of the saturated gravel soil decreases with the increase of the coarse grain content,as well as the number of drainage surfaces.The corresponding dynamic residual volumetric strain under the double-drainage condition is 2-2.5 times that under the single-drainage condition.关键词
排水条件/粗料含量/砂砾土/动残余变形Key words
drainage condition/coarse grain content/gravel soil/dynamic residual deformation分类
建筑与水利引用本文复制引用
赵凯,周建军,孙田,刘德洋..考虑排水条件和粗料含量的砂砾石土动残余变形特性[J].岩土力学,2018,39(3):926-932,7.基金项目
国家863计划课题(No.2012AA041802,No.2012AA041803) （No.2012AA041802,No.2012AA041803）
国家自然科学基金青年项目(No.51608267).This work was supported by the National High Technology Research and Development Program (863 Program) of China (2012AA041802,2012AA041803) and the National Natural Science Foundation of China (NSFC) (51608267). （No.51608267）
