有限元计算深开挖中挖方等效荷载的分析

模拟开挖计算的有限元分析，关键在于计算挖方的等效荷载，然后将此等效荷载反作用于剩余结构进行有限元计算。对目前计算挖方等效荷载的两种有代表性的方法进行了比较和研究，得出了开挖面上应力平衡的方法是计算挖方等效荷载的最佳方法的结论。

Analysis of Equivalent Load Caused by the Removal of Soil in Finite Element Calculation of Excavation

In the finite element analysis of simulated excavation,the key step is to calculate the equivalent load caused by the excavated soil,then put its antiload on the skeleton left and perform finite element analysis According to the two typical methods at present used for calculating this equivalent load,this paper studies each method in detail with illustration Theoretically,the method one via the static equiblibrium of the stresses on the excavated surface is the optimum one