The 3 000 DWT gravity wharf is a hollow concrete block quay wall built on the strata of silty sand and silty clay,which has favorable engineering geologic features.This article calculates the wharf’s settlement by the layer wise summation method,and makes numerical simulation by finite difference method.Selecting critical parameters (one dimension compression empirical coefficient and elastic modulus) reasonably,the calculation results given by the above mentioned method are identical to the measured data,which proves that the calculation methods are appropriate to similar geologic conditions.