Effects of the thickness of sandy beds on pore water pressure and liquefaction by pressure fluctuation

Abstract

Effects of the thickness of sandy beds on the properties of transmission of pore water pressure and liquefaction were experimentally investigated using a fluctuating pressure-type liquefaction test apparatus. The attenuation of the pressure amplitude in sandy beds increases as the thickness of sandy beds is bigger and the phase delay of pressure change becomes maximum at which the thickness of sandy beds is about 2.0m. The thickness of liquefaction layer increases as the thickness of sandy beds is bigger and experimental values become smaller than theoretical values as the thickness of liquefaction layer increases.