岩土力学2011，Vol.32Issue(11)：3225-3230,6.
加肋土工膜与砂土界面特性研究
Interface property between sand and reinforced geomembrane
摘要
Abstract
Interface instability between HDPE geomembrane and sand is a main reason for landfill structural failure on lining interface. Though factional coefficient of textured geomembrane is large, it is easy to be splited by the huge tension force accumulated on the landfill lined slope, or to be weared and teared. A novel concept of reinforced HDPE geomembrane is proposed. A series of direct shear tests were carried out to investigate interfacial characteristics and stress mechanism under different normal stresses and spaces of reinforcement. Comparison was made between stress-strain relationship and strength property of reinforced geomembrane, smooth geomembrane and textured geomembrane. It was shown that cohesion of strip geomembrane was increased, internal frictional angle was reduced, while both of lump geomembrane were increased considerately. Along with decreasement of space, cohesion of reinforced geomembrane added. However there is a gradual reduction of internal frictional angle when it exceeds a specific value. Compared with smooth geomembrane and textured geomembrane, reinforced geomembrane, as is a new kind of geosynthetics, not only has a higher interface shear strength with sand, but also has a better rupture strength.关键词
加肋/土工膜/剪应力/直剪试验Key words
reinforced/geomembrane/shear stress/direct shear test分类
建筑与水利引用本文复制引用
高俊丽,张孟喜,张文杰..加肋土工膜与砂土界面特性研究[J].岩土力学,2011,32(11):3225-3230,6.基金项目
国家自然科学基金资助项目(No.40972192). （No.40972192）
