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考虑初始地应力、渗流荷载、岩体和锚杆 (索 )参数随机性影响 ,模拟施工开挖步序 ,提出了地下洞室围岩稳定的非线性随机有限元法和可靠度计算方法 ,在计算出可靠度的同时还可得出围岩和加锚元件变形、应力的均值和标准差 ,文末对某一实际工程进行了计算和分析 ,得出了若干有益的结论。
Considering the influence of initial geostress, seepage load, randomness of rock mass and bolt (cable) parameters, and simulating the construction excavation sequence, a nonlinear stochastic finite element method and reliability calculation method of surrounding rock stability of underground caverns are proposed. At the same time, the mean value and standard deviation of deformation and stress of the surrounding rock and anchor component can be obtained while calculating the reliability. At the end of the article, some practical projects are calculated and analyzed, and some useful conclusions are drawn.