SHAKING TABLE TESTS ON A DEFORMATION MITIGATION METHOD FOR ROAD EMBANKMENT DURING LIQUEFACTION BY USING GRAVEL AND GEOSYNTHETICS

Abstract

Small scale shaking table tests in a 1-g gravity field were carried out to evaluate effectiveness of a deformation mitigation method for road embankment during liquefaction by using gyosynthetics sandwiched between gravel. The gravel layer could dissipate an excess pore water pressure during liquefaction immediately, and restrained a shear deformation under the embankment because of its high permeability. Furthermore, the composite layer which consisted of the gravel with geosynthetics could perform as a rigid plate with high permeability. As a result, the improved layer could restrain the deformation of embankment, and this effect could keep shape of embankment.