Abstract：The object of this paper is the application of three-dimensional finite element program developed in laboratory，it can consider the multiple planes zero-thickness interface elements and calculate the bearing capacity and simulate the progressive failure mechanism in the cohesive soil. These 3D numerical studies include the ultimate bearing capacity of slope stabilities and shallow foundation. According to the obtained results，the calculation is particularly approached to the upper bound of limit analysis. It shows that the 3D interface elements can be used to predict the bearing capacity of soil，and evidently describe the progressive failure mechanism of slope and foundation stability analysis under the different geometries.
