Experimental study on interface friction characteristics between geosynthetics and materials by pull out tests

Interaction property between geosynthetics and fill materials was an important factor to determine tension characteristics in components of liner system in landfill.The investigation about the interaction characteristics of 3 kinds of geosynthetics with sand and clay were presented by pull out tests.Experimental results show:The peak shear stress and its shear displacement increase with the increasing of normal stress.Angle of friction between geosynthetics and clay is bigger;when the fill material is sand,angle of friction between geosynthetics and sand,geotxtile first places;EPDM geomembrane comes second;HDPE geomembrane comes last;When the geotextiles are installed on the up and down of the HDPE geomembrane,the coefficient of friction of the interface is smallest.