Abstract：In this article, a settlement calculation method for foundation soil is presented.Through studying the effect of gravity stress on foundation-soil deformation modulus, using a primitive integral method to calculate the additional stress of the soil and applying the deformation modulus after influenced by gravity stress to the settlement calculation of the additional stress of the soil, a simplifying computational method for settlement of foundation soil using a layer-wise summation method is put forward.By comparing the computation and analysis of an engineering example with results by the method of code for design of building foundations and other methods, it is shown that the proposed method is simple and feasible and the results agreed well with the observations.

Keyword：gravity stress;deformation modulus;settlement of foundation;additional stress of soil;layer-wise summation method;