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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。
In this paper, the boundary element static and dynamic analysis package BESDAP is used to calculate and analyze the deformation and stability of surrounding rock of a large-scale hydraulic engineering underground cavern group. For some common characteristics and requirements of the boundary element method in large-scale engineering applications, several important calculation techniques are effectively dealt with. The calculation results show the mutual influence between each cavern, the hole displacement, stress at each hole, and the shear failure zone around the cavern. The entire calculation process and the final results show that the various advantages of the boundary element method are particularly significant in the analysis of the surrounding rock mass in the underground caverns.