高地应力隧道施工对围岩应力与变形的影响研究

依据围岩稳定性理论，通过数值模拟方法，针对参数变化较大的几类围岩及参数在小范围变化的同一类围岩在高地应力圆形隧道施工过程中围岩应力与变形的表现形式，建立大量数值模型进行分析。结果表明：围岩较好的隧道主要应解决高地应力集中问题，围岩较软弱的隧道主要应解决变形问题；围岩参数小范围变化时，对围岩应力影响由大到小的参数依次为内摩擦角、粘聚力、泊松比、弹性模量，对围岩变形影响由大到小的参数依次为弹性模量、粘聚力、内摩擦角、泊松比。

The Influence of the High Geostress Tunnel Construction on Surrounding Rock Stress and Deformation

Based on the stability theory of surrounding rock and through the numerical simulation method, according to some classes of surrounding rock of bigger parameter changes and the same kind of surrounding rock in the small scope parameter changes, the forms of surrounding rock stress and deformation are different in the high geostress circular tunnel excavation, a lot of established numerical models are analyzed. Studies show that in the good surrounding rock tunnel the high ground stress concentration problems are to be solved, and in the weak rock tunnel the deformation problems are to be solved. When the parameters of surrounding rock change little, the parameters from big to small which have the influence on the surrounding rock stress are in turn the internal friction angle, cohesion, poisson ratio, and elastic modulus, and the parameters from big to small which have the influence on the surrounding rock deformation are in turn the elastic modulus, cohesion, internal friction angle, and poisson ratio.