鲁基厂水电站尾水洞围岩稳定分析

采用非线性弹塑性有限元方法,根据地下洞室施工开挖过程及锚固方法,对云南鲁基厂水电站尾水洞进行了正常开挖工况及施工完建地震工况下围岩稳定分析计算。分析结果表明设计采用的锚喷及衬砌支护方案基本合理。采用的弹塑性有限元基本理论及支护计算方法、洞室支护方案等对同类工程的设计、施工具有一定的参考意义。

Analysis of Wall Rock Stability in Tail Water Tunnel in Hydro-electric Station of Luji Plant

The wall rock stability in the tail water tunnel in the hydro-electric station of Luji Plant has been calculated and analyzed,based on the analysis of the underground excavation process and anchoring process with the non-linear elastic-plastic finite element method.The stability has been analyzed in the different situations of usual excavation and the earthquake status.The result has proved that the selection of the anchor spray and lining protection in the design scheme is rational.The key parts in this project,including the theory of elastic-plastic finite element method,the protection calculation method and the excavation protection scheme can be examples of good reference to the design and construction of projects of the same kind.