Direct Shear Tests Used in Soil-Geomembrane Interface Friction Studies

摘要

Soil-covered geomembrane canal and reservoir liner systems, although not ascritical as hazardous waste liner systems, have performed poorly on some Reclamation (Bureau of Reclamation) projects. To aid in establishing design parameters for future projects, the research program on geosynthetic canal lining systems funded a series of direct shear tests on interfaces between a typical cover soil and different geomembrane liner materials. The purposes of the testing program were to determine the shear strength parameters at the soil-geomembrane interface and to examine the precision of the direct shear test.