羊曲水电站泄洪洞围岩稳定性有限元分析

隧洞施工过程中的围岩的稳定性分析是工程地质和岩体力学非常重要的研究课题,依据地下结构设计理论和岩石屈服Druck-Prager准则,考虑到了围岩的自身承载能力,采用非线性有限元的方法对羊曲水电站泄洪洞开挖施工过程中围岩的稳定性进行分析,对隧洞围岩开挖支护施工过程进行模拟,分析隧洞围岩位移变形及应力分布规律,为隧洞开挖施工过程中围岩和结构稳定性分析提供依据。

Finite element analysis of stability for spillway tunnel of Yangqu hydropower station

The stability analysis of surrounding rock in the tunnel process of construction is a very important research subject of engineering geology and rock mechanics.According to the theory of underground structure design and Druck-Prager yield criterion of rock, Considering the bearing capacity of wall rock itself, the paper analyzed the stability of Yangqu hydropower station spillway tunnel in process of rock excavation construction by use of the method of nonlinear finite element .It also simulated the process of tunnel excavation construction and analyzed the displacement deformation and stress distribution of tunnel surrounding rock.The method can provide the basis for the stability analysis of surrounding rock and structure in the construction of tunnel excavation.