Frost Heaving Deformation Numerical Analysis of Deep Foundation Pit Support System

The foundation pit works may experience winter in the seasonal frozen soil area,and its supporting structure will be affected by the frost heaving of the soil.In this paper,the deformation problem is studied of deep foundation pit supporting structure caused by soil frost heave.Firstly,based on the frost heaving theory,the influence mechanism of soil frost heave is analyzed on the foundation pit supporting structure.Then,the basic equations of temperature field and stress field of soil are constructed,based on specific engineering example and the relevant thermal parameters and mechanical parameters of finite analysis are defined.Finally,the ANSYS finite element analysis software was used to simulate the temperature change,the axial force change of the anchor and the horizontal displacement of the pile.The simulation results are basically consistent with the practical monitoring results,and good simulation results have been obtained,which provides a reference for the subsequent wintering projects like deep foundation pits.