溪洛渡电站左岸地下厂房洞室群围岩稳定性研究

Study on the Cavern Surrounding Rock Stability of the Underground Powerhouse of the Xiluodu Hydropower Station

利用预布大规模随机裂隙生成网格技术,采用非线性弹塑性有限元法,对溪洛渡左岸地下厂房洞室群加固前后进行了模拟,获得了洞周围压变形特征、应力分布状态,给出了洞周不稳定块体的部位及破坏形式及支护结构中的内力变化情况,通过对比、分析,得出一些结论,为溪洛渡左岸地下厂房洞室群的支护设计提供了科学依据和技术指导。

The grouped caverns of the left bank underground powerhouse of the Xiluodu hydropower project are modeled in detail by using the non - linear finite element method, taking into consideration joint distribution. The deformation, stress field and disturbed range of surrounding rock mass are studied and the difference between the unsupported cavern and the supported cavern is analysed. Moreover the location and the form of failure of the potential unstable block mass are demonstrated. The study results provide scientific basis and technical advice for support design of the left bank undergnamd powerhouse caverns of the Xiluodu hydropower project.