某地下洞室开挖围岩稳定性数值模拟分析  

Numerical Simulation on the Stability of Excavated Underground Rock Cavities

作　　者：欧阳丽[1] 

机构地区：[1]三峡大学土木水电学院

出　　处：《灾害与防治工程》2007年第2期44-48,共5页Disaster and Control Engineering

摘　　要：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 geological exploration data of a hydropower project, the geomechanics conditions in construction region of were analyzed, and a mechanical model which represented the topography, rock mass structure and condition of ground stress was created. According to measuring results of ground stress, the initial ground stress field was back analyzed by linear finite element method. Then, the stress distributions in rock mass under excavation and support conditions were simulated by non--linear finite element method. Finally, the feasibility of excavation scheme was discussed. The stress concentration zone and potential failure region under different excavated phases were presented.

关 键 词：地下洞室 围岩稳定 数值模拟 地应力 

分 类 号：TU457[建筑科学—岩土工程]