Response of Inclined Loaded Pile in Layered Foundation Based on Principle of Minimum Potential Energy

To investigate the responses of inclined loaded piles in layered foundations, this paper proposes a generalized solution based on the principle of minimum potential energy. First, the energy equations for an inclined loaded pile and the surrounding soil are deduced. With the consideration of deformation compatibility and the pile-soil interaction, the governing differential equation for the pile is obtained via a power series method based on the energy method. Subsequently, the power series solutions for the pile deformation under axial and lateral loads are obtained. The results indicate that the analytical solution proposed in this study can provide consistent predictions with experimental results. Furthermore, the ratio of the elastic modulus between the upper and the lower soil, the length-diameter ratio, and the change ratio of the elastic modulus of the adjacent soil have significant influence on the lateral displacement and the bending moment of the inclined loaded pile.

Automated summary

This paper proposes a generalized solution based on the principle of minimum potential energy to investigate the responses of inclined loaded piles in layered foundations. The energy equations for the pile and the surrounding soil are deduced, and the governing differential equation for the pile is obtained using the energy method and a power series method. The power series solutions for the pile deformation under axial and lateral loads are obtained. The results show that the proposed analytical solution agrees well with experimental results, and the ratio of elastic modulus, length-diameter ratio, and change ratio of elastic modulus of adjacent soil have significant influence on the lateral displacement and bending moment of the inclined loaded pile.