Bearing Capacity Analysis of Pile Foundations Under Composite Loads Based on the Pasternak Foundation Model Under Small Deformation

In this paper, we analyzed the response of pile foundations under small deformation and composite loads. Our method is based on the Pasternak two-parameter foundation model and takes skin friction into consideration. The finite difference method was used to solve the established equilibrium differential equation, obtaining a semianalytical solution for the internal force and displacement of the pile. Comparing our method with the traditional method showed that the results using our method are closer to measured values. Additionally, the results showed that the thickness of the shear layer and skin friction affect the response of the pile, but the latter’s influence on the pile is relatively small.