摘要
糯扎渡水电站工程规模巨大，地质条件较为复杂。在地下厂房洞室群围岩稳定开展科研工作的基础上，结合计算成果及国内已建和在建的大跨度地下洞室的设计与施工经验，运用有限元计算方法，对拟定的支护参数进行了验证。同时结合最新揭露的地质条件，类比小湾、龙滩等电站规模相近工程的建设经验，调整和优化了支护参数。在施工期通过围岩变形监测表明稳定状况良好。支护构件应力属可控水平。
Nuozhadu Hydropower Station has a huge project scale and quite complex geological conditions. Based on the scientific research on stability of the surrounding rock of the underground powerhouse cavity group, the proposed supporting parameters are verified by using the finite element calculation method in combination with the calculation results and the experience in the design and construction of the large-span underground cavities which have been completed and are in progress. Meanwhile, based on the recently disclosed geological conditions, the supporting parameters are optimised in analog with the construction experience in similar projects such as Xiaowan Hydropower Station and Longtan Hydropower Station. The monitoring on deformation of the surrounding rock during the construction period shows good stability. The stress of supporting members is at a controllable level.
关键词
糯扎渡水电站
地下厂房
围岩稳定
变形监测
支护优化
Nuozhadu Hydropower Station, underground powerhouse, stability of surrounding rock, deformationmonitoring and supporting optimisation
