Computation of Pile-Sinking Resistance of Jacked Pile Based on Cavities Expansion Theory

摘要

According to the penetration mechanism of jacked pile, a mixed mode of cylindrical-spherical cavity expansion is proposed to simulate the installation process of jacked pile. Soil is assumed as Mohr-Coulomb material and meets the criterion of elasto-plastic deformation. Based on the theory of cylindrical cavity expansion and spherical cavity expansion, a new method is proposed to get the pile tip resistance and skin friction. Then the total penetration resistance of jacked pile is obtained. It is proved that this method is feasible because the values of pile-sinking resistance calculated by the equations with software are consistent with the field tests results.