STUDY ON HORIZONTAL PERMEABILITY COEFFICIENT OF CUTOFF GEOMATERIAL AFTER SHEAR DEFORMATION BY HOLLOW TORSIONAL SHEAR TESTING APPARATUS

Abstract

 The horizontal permeability of artificial cutoff geomaterial for off-shore waste disposal facility was studied. Considering the safety of waste disposal site against the strong earthquake, the permeability of geomaterial after shear deformation must be taken into account in the design. The horizontal permeability of cutoff geomaterial which was made of marine clay and bentonite was measured after K₀ consolidation and the torsional shear to 20% with the hollow cylinder torsional shear testing apparatus. It was found that the horizontal permeability of cutoff geomaterial was not affected by the shear deformation. Measuring coefficient of permeability of horizontal direction. The method presented in this study seems to be available to measure the horizontal permeability of clay after shear deformation.