基于有限元与块体元法的地下洞室变形及稳定分析

DEFORMATION STABILITY ANALYSIS OF UNDERGROUND CAVE BASED ON THE COMBINATION OF "FEM"AND "BKEM

本文把有限元与块体无法结合起来，用来分析地下洞室围岩的变形及稳定性。此法在洞室附近使用块体元模型，以反映节理岩体变形的不连续性，而在远处使用连续的有限元模型，以减少计算工作量。文中推导了有限元与块体元法统一力学模型的支配方程，所编制的数值分析程序应用于某一实际工程问题，说明此法可行。

In this paper, the finite element method (FEM) is combined with the block element method (BKEM) to study the deformation and stability of jointed rock masses around an underground cave. The block element are used to model the rock masses near the cave so that the discontinuous deformation of jointed rock is dealt with easily and the computational effort is reduced accordingly. The governing equations of the present strategy are given. Numerical results show that the present method is feasible.