工程地质学报Issue(6)：981-985,986,6.
填埋场衬垫系统界面本构模型研究
STUDY ON INTERFACE CONSTITUTIVE MODEL IN LANDFILL LINER SYSTEM
摘要
Abstract
In the landfill,liner systems typically contain a large number of material interfaces(soil/geomembrane or geomembrane/geosynthetics).These interfaces become potential slip surfaces because of the low shear strength, which results in the instability of landfill.Based on many direct shear tests,the deformation mechanism and strain softening property of soil/geomembrane interface,the interface thickness,tangential strain and normal strain are determined.The deformation of the interface is divided into three stages:elastic stage,plastic stage and residual stage.Above all,the elastic-plastic interface constitutive model is put forward.There are only a few parameters with clear physical meanings in the model.At last,the results using this model are compared with those of the interface direct shear tests and ring simple shear tests.The comparison results show that this model is reasonable and feasi-ble,and can be used for practical engineering.关键词
土/土工膜接触面/应变软化/弹塑性本构模型/对比验证Key words
Soil/geomembrane interface/Strain softening/Elastic-plastic interface constitutive model/Compari-son and validation分类
建筑与水利引用本文复制引用
张素珍,郑七振,孙锦剑..填埋场衬垫系统界面本构模型研究[J].工程地质学报,2013,(6):981-985,986,6.基金项目
上海市研究生创新基金项目（JWCXSL1202）资助． （）
