应用边界元方法求解地下洞室三维开挖问题

Boundary Element Method and its Application to Three-dimensional Underground Engineering

将边界元方法和FORTRAN语言相耦合,完善了三维线弹性无限域问题的边界元方法源程序。利用此程序计算并分析单条地下洞室开挖、双条平行洞室开挖、双条正交隧洞开挖三维应力场和位移场分布,洞室周壁的应力集中系数,洞室周壁的位移变形规律,给出了洞室周壁岩体的稳定性。得到的一些结果可以对实际工程做定性指导。

This paper adopts boundary element method （BEM） and FORTRAN language to calculate and analyze three-dimensional underground tunnels. On the basis of summarizing predecessors＇fruitful results, we perfect the boundary element method program of linear elasticity for an infinite region in three dimensions. Then the paper utilizes the procedure to calculate and analyze the stress and displacement distribution, to analyze the stress concentration on tunnel section of one single underground tunnel, two parallel underground tunnels and two perpendicular tunnels. Then the stability of rock body on tunnel section is given out. The results of this paper can do qualitative guidance to the project.