PROGRESSIVE LIQUEFACTION PROCESS OF LOOSELY DEPOSITED SAND BED UNDER OSCILLATING WATER PRESSURE ON ITS SURFACE

Abstract

In this paper, the progressive liquefaction process of the loosely deposited sand bed under oscillating water pressure on its surface is investigated theoretically by using the vertically one-dimensional model, in which the elasto-plasticity of the sand bed skeleton is taken into account. The changes of pore water pressure, effective stress and liquefaction depth in the sand bed with time are simulated during the initial time period after the cyclic pressure loading. The experimental results verified that the proposed analytical model expressed fairly well the progressive liquefaction process of the sand bed.