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从影响隧洞围岩稳定因素出发应用数值计算方法探讨岩体力学参数弹性模量和泊松比变化对围岩稳定的影响程度及规律为工程支护设计、围岩稳定分析提供参考。研究结果表明:弹性模量变化对围岩变形有较大影响对围岩应力几乎没有影响而泊松比变化对围岩应力和变形均有较大影响。应谨慎地选取岩体力学参数。
Based on the factors that affect the stability of the surrounding rock of tunnel, the influence degree and regularity of elastic modulus and Poisson ’s ratio of rock mass on the stability of surrounding rock are discussed by numerical method to provide reference for engineering support design and stability analysis of surrounding rock. The results show that: the elastic modulus has a greater impact on the deformation of surrounding rock has little effect on the stress of surrounding rock, but the change of Poisson’s ratio has a greater impact on the stress and deformation of the surrounding rock. Rock mechanics parameters should be carefully selected.