关键词: 土工布, 拉伸性能, 级配碎石, 筋土界面特性, 垃圾渗滤液, 垃圾填埋场,

Abstract: Geotextile have been widely used in the reinforcement of waste landfill to enhance its stability. However, there is uncertainty for the effect of landfill leachate soaking on tensile properties of geotextile and the interface characteristics of geotextile-soil. In this paper, tensile test of geotextile and the direct shear test of geotextile-graded gravel were conducted for two types of geotextiles immersed in landfill leachate for 12 months to provide insight into the effect of leachate soaking on the behavior of the tensile properties of geotextile and the interface characteristics of geogrid-soil. The results can be concluded as follows: the erosion effect of landfill leachate on geogrid had a little effect on its ultimate tensile strength; the failure elongation of geotextiles increased 4.58% and 17.60% for the two geogrid; the secant modulus of geogrid decreased slightly, which mainly affected the secant modulus of geotextiles under lower elongation strain(strain less than 4%-5%); and the soaking effect of landfill leachate did not have an significant effect on the shear strength, friction angle and apparent cohesion of the reinforced soil. The findings of this study can provide guidance for application and development of reinforced waste landfill projects.

Key words: landfill leachate, geotextile, graded macadam, tensile property, geotextile-soil interface characteristics,