HDPE土工膜与无纺土工织物界面的变正应力持续剪切试验研究  

The Continuous Shear Test of Variable Normal Stress for the Interface Between HDPE Geomembrane and Nonwoven Geotextile

作　　者：汪杨成 施建勇[1,2] 杨洋 WANG Yangcheng;SHI Jianyong;YANG Yang(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学江苏省岩土工程技术研究中心,南京210098

出　　处：《河南科学》2019年第2期219-224,共6页Henan Science

基　　金：国家自然科学基金重点项目(41530637)

摘　　要：垃圾填埋场的填埋采用单元、分层作业,衬垫系统上的正应力随着垃圾体量的增加而上升.依据填埋场的实际填埋工况,设计了土工膜与土工织物界面的变正应力持续剪切试验方案.试验结果表明,分别在弹性阶段、软化阶段和大位移阶段改变正应力后,其峰值强度依次减小,从改变正应力处起位移增量为50 mm处的大位移强度亦依次减小.改变正应力前的剪切位移,会影响改变正应力后的峰值强度和大位移强度.In this paper,the landfill is adopted the unit and layered operation,and the normal stress of the liner system is increased with the increases of the volume of the waste. According to the actual landfill conditions,the variable normal stress which continuous the shear test scheme for the interface between geomembrane and geotextile is designed. The test results show that the peak strength decreases in turn after changing the normal stress in the elastic stage,the softening stage and the large displacement strength decreases in changing turn when the displacement increment is 50 mm from the change of the normal stress. The shear displacement before the normal stress is affected the peak strength and the large displacement strength after changing the normal stress.

关 键 词：填埋场 变正应力 直剪试验 应力-位移曲线 强度 

分 类 号：TU411[建筑科学—岩土工程]