季节性冻土与铁塔桩基础相互作用有限元分析

In the northern frozen-soil region，the heaving soil's low temperature is the key factor that impacts the stability of foundation. This paper makes the heat-stress coupled numerical analysis on the cold expansion effect of the pile foundation to the Ulanhot-Baicheng 500kV transmission line engineering by finite element software ABAQUS. Firstly, the seasonal frozen soil's temperature field should be calculated. Then, the temperature value acting as the temperature model's initial condition is put into the structure model for computation, which can help to get the pile foundation's stress field and strain field. The results show that, the stress state of pile-frozen soil under external load can be reflected accurately through the finite element model and the related parameters proposed, along with the finite element software.