EFFECT OF PILE LENGTH ON SEISMIC RESPONSE OF CAISSON TYPE QUAY WALL RESTING ON PILE FOUNDATION

Abstract

Dynamic behavior of a caisson type quay wall resting on pile foundation against the 1995 Hyogoken Nanbu Earthquake was numerically evaluated by a liquefaction analysis based on effective stress model. The effect of pile length on seismic response of caisson type quay wall against earthquake motion was investigated through some numerical examples. The displacement response of the caisson quay wall with pile foundation was smaller than that of the caisson without pile foundation. When the pile length becomes longer, the displacement response of caisson type quay wall becomes smaller. As the deformation was mainly induced by the increase of pore water pressure in the soil behind the caisson type quay wall, it is indispensable to reduce the pore water pressure in case of applying longer pile to the caisson type quay wall.