Study on the interaction of a single pile and pile groups with the soil in layered foundation

Applying fundamental solution in a multilayered elastic medium, the pile and its corresponding soil foundation are first discretized into cylinder and circular elements, and then the equations of stress and displacements are established for piles and soil foundation respectively. The Integral equations for obtaining loads and displacements of pile-foundation interaction are presented by using displacement compatibility. The numerical method for analyzing the pile-foundation interaction is developed for considering the nonhomogeneous properties of the soil. By using the fundamental solutions of layered elastic solids, the proposed method can be used for analyzing of the pile-foundation interaction in nonhomogeneous soils with parameters arbitrarily changing along depth. With the correctness and accuracy verified by the practical engineering design, the proposed method can achieve more satisfactory results compared with the existing methods.