Seismic behavior of a caisson type quay wall on a pile foundation

The dynamic behavior of a caisson-type quay wall resting on a pile foundation during the 1995 Hyogo-ken Nanbu Earthquake was evaluated numerically by liquefaction analysis, which was based on an effective stress model. The effective stress model used for liquefaction analysis during the earthquake ground motion was based on the strain space multiple mechanism theory. The effect of the application of a pile foundation to a caisson-type quay wall was studied by liquefaction analyses. The deformation during the earthquake ground motion was caused by an increase in the excess pore water pressure in the ground behind the caisson-type quay wall. The displacement of the caisson-type quay wall with a pile foundation was smaller than that of the caisson-type quay wall without a pile foundation. However, the deformation was mainly induced by the increase in the excess pore water pressure, regardless of the existence of the pile foundation under the caisson structure.