Abstract：An appropriate finite element model was given according to the actual process of jacked pile. This model adopted the rational constitutive model of soil and finite deformation theory. Through pile-soil contact and displacement loading on pile top, the pile-sinking process was simulated. Displacement fields were studied through the finite element model. The effects of displacement fields caused by pile-soil friction were discussed. Then comparisons between pile-soil interacting model and cavity expanding model were made. The results show that the pile-soil interaction and interface fiction are important influential factors in the simulation of jacked pile.
