Shear strength characterization of geosynthetic interfaces on inclined planes

Tests to characterize the shear strength of geosynthetic interfaces under l ow confinement pressure were carried out on an instrumented inclined plane apparatus designed at Lirigm. The apparatus was validated through repeatabi lity and reproducibility tests carried out as part of the European project to standardize geosynthetic interface tests. Typical results obtained for g eosynthetics of different textures are presented and discussed. Finally, in terface test results obtained using the direct shear box under normal confi nement pressure and on an inclined plane under low confinement pressure wer e compared and assessed.