NUMERICAL MODELING OF SMOOTH GEOMEMBRANE—SOIL INTERACTION SHEAR BEHAVIOUR BY DISTINCT ELEMENT METHOD

摘要

Geomembranes are one of the most widely used geosynthetics in various civil engineering applications.Their primary function is as a barrier to liquid. Smooth geomembranes are frequently used in combination with different soils, and due to their low surface roughness, are challenging to design to ensure adequate shear strength along the smooth geomembrane-soil interface. It is important to use the appropriate values of interface shear strength parameters in the design of slopes incorporating one or more geomembrane in contact with soils. This paper deals with study of smooth geomembrane-soil interfaces with distinct element method (DEM). The various factors that affect the interface shear behaviour are also studied. The models were conducted using direct shear box with PFC code that is a distinct element program. We tried to model the interface by DEM which is capable of modelling the interface and the obtained results show a good concordance with the experiments.