POST-CYCLIC CONSOLIDATION RESPONSE OF A NATURAL LOW PLASTIC SILT DUE TO DISSIPATION OF CYCLIC EXCESS PORE WATER PRESSURES

摘要

The post-cyclic consolidation response of a natural low-plastic silt was examined using undisturbed silt specimens tested in a constant volume cyclic direct simple shear (DSS) device. The silt specimens initially subjected to constant volume cyclic loading at different cyclic stress ratios (CSRs), until different values of cyclic shear strain were reached, were subsequently allowed to experience one-dimensional consolidation.Post-cyclic consolidation volumetric strains (εv-ps) were noted to increase with the maximum pore water pressure generated during cyclic loading as well as with the maximum cyclic shear strain to which the specimens were subjected during cyclic loading. The values of εv-ps correlated well with the excess pore water pressure ratio (ru)during constant volume cyclic loading prior to consolidation.