中文摘要：

针对实际工程中成层土情况中静压桩存在的问题，在ANSYS平台上，应用位移贯入法对静力压桩的连续贯入的全过程进行有限元模拟，详细对比了在均质土和成层土中静力压桩产生的位移场和应力场。指出软硬土层交界处土体位移加大，土中挤压应力剧变，出现应力间断。实际工程中，挤压应力间断使已压入桩的侧向受力剧变，导致桩体易开裂、弯折。这里提出柏应的解决方法。

英文摘要：

Aiming at the problems occurring in actual projects, using the displacement penetration method, the complete process of successive penetration of jacked pile is simulated with finite element method based on ANSYS. Displacements and stress field in homogeneous soil are compared with which in layered soil in detail. It is shown that the soil＇s displacement increases; and radial compression stress changes rapidly and discontinues at the boundary of soft soil and hard soil; and piles driven before are prone to be broken there,The methods for prevention is put forward.