Energy Method for Deformation Analysis of Flexible Pile Composite Foundation Under Lateral Restriction

Abstract

To limit the lateral extrusion and compression deformation of soft soil within the load-bearing range, and effectively control the settlement of soft soil foundations, a new technology for side-limited flexible pile composite foundation and energy method for deformation analysis has been proposed. Based on certain assumptions, the compo-site reinforcement area within the side limit and the natural foundation within the de-formation influence depth are considered as a whole, and the displacement component expressions that satisfy the displacement boundary conditions are constructed, leading to the formulation of the total potential energy equation for the system. Based on the principle of potential energy extremum, a displacement variational equation for the system is established, and an approximate analytical algorithm for deformation analysis of flexible pile composite foundation under side limit conditions is proposed. The rationality of the theoretical analysis method is verified by FLAC3D numerical simulation results and on-site monitoring results.