Fixed offshore platforms and jack-up drilling platforms can be constructed at the same time because of the development of new jack-up vessels and construction techniques.Unfortunately,a side effect may occur on the pile foundations of the fixed platform when the spudcan penetrates nearby.It is very difficult to simulate the whole dynamic process by a finite-element method.This paper primarily solves the formula of the squeezing soil effect using ball cavity expansion theory.On the basis of the analytical solution,a new pseudo-static method is proposed,which can approximately take the dynamic effect into account.It is analyzed for the bearing capacity,mises stress,and maximum horizontal displacement of pile foundations at different spudcan penetration depths based on an actual project.The simulation results are contrasted with the simple static simulation method.The comparison shows that the bearing capacity is 6%~8% lower than the static simulation result,the Mises stress is 30%~80% higher,and the maximum horizontal displacement is two times larger.