Abstract:To develop the rational numerical method for predicting the deformation and failure of the rigid pile foundation on rock slope,a series of nonlinear elasto-plastic FEM analyses were conducted to simulate the field experiment on the bearing capacity and failure deformation of rigid pile foundation on rock slope under the lateral loading. In the analyses,rock was supposed to be a elasto-perfectly Mohr-Coulomb plastic material with or without considering the low-tension strength effect. The results obtained from the FEM analyses were compared with that of the field experiment. It was found that the load-displacement relation and the failure mechanism of the rigid pile foundation obtained from the 3D-FEM analyses,in which the low-tension strength effect for rock was considered,has a good agreement with the field experimental result. In addition,by making use of the above rational numerical method,the effects of distance from pile foundation to the top of slope and slope angle on the lateral bearing capacity were also successfully evaluated.