The interface shear strength was studied using direct shear machine with high stress and tilt table device with low stress. Here the interfaces between three different types of HDPE (high density polyethylene) geomembranes and sand

geotextile and geocomposite were considered. Tests were performed with interface scale of 200 mm 200 mm. Through the analyses of test results

some frictional characteristics of HDPE geomembrane interface were provided; and the comparison between direct shear test and tilt table test was made.