三维边界元在地下洞群围岩变形与稳定分析中的应用

Application of 3-D BEM for Deformation and Stability Analysis on the Surrounding Rock of Underground Tunnels Group

本文应用边界元静动力分析程序包BESDAP对某大型水利工程地下洞群的围岩变形与稳定进行了计算分析。针对边界元法在大型工程应用中的一些共同的特点与要求,对若干重要的计算技术问题作了有效的处理。计算成果给出了各洞室之间的相互影响、各洞室的孔边位移、应力以及洞周的剪切破坏区。整个计算过程与最终成果均表明边界元法的各种优点在地下洞群围岩分析中表现得特别显著。

The deformation and stability problem on the surrounding rock of underground tunnels group of a large water-conservancy project has been made analyses by BESDAP, a Boundacy Element Static and Dynamic Analysis Program. Considering the some common characters and requirements Of application BEM to large engineering project, several improtant calculating techniques has been treated successfully. The computed results covering the interference each other between various tunnels, the displacements and stresses around tunnels and shear failure region around each tunnel are given. These results and calculating process demonstrate BEMS merits more evidently when it is applied to the surrounding rock analysis of underground tunnels.