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结合某电站的工程建设实际,在场区地勘资料分析的基础上,深入分析了工程区的地质力学环境条件,建立了能够反映工程区地貌、岩体结构和地应力环境条件的力学模型。以地应力实测结果为参照依据,采用线性有限元法反演分析了初始地应力场,采用非线性有限元方法模拟了地下厂房等主要洞室开挖施工与支护过程中的围岩应力和稳定性状况,论证了地下洞室开挖方案的可行性,揭示了大型地下洞室不同开挖阶段应力的集中部位和围岩的潜在破坏部位。
Based on the actual engineering construction of a power station and on the basis of the analysis of the geological survey data in the site area, the geomechanical environmental conditions in the project area are analyzed in depth. The mechanical model that can reflect the geomorphology, rock mass structure and environmental stress in the engineering area is established. Based on the measured results of in-situ stress, the initial stress field was analyzed by linear finite element method. The nonlinear finite element method was used to simulate the stress and deformation of surrounding rock in the excavation and support of underground caverns. Stability status of the underground caverns. The feasibility of the underground cavern excavation scheme is demonstrated. The potential damage sites of the concentrated stress and the surrounding rock at different excavation stages of large underground caverns are revealed.