向家坝水电站大型地下厂房洞室群开挖工程实践

Underground Powerhouse Excavation of Xiangjiaba Hydropower Station

向家坝水电站地下厂房系统规模巨大,地质条件复杂。在大量科研工作的基础上,确定了地下洞室群,尤其是主厂房的施工程序和支护参数。建设过程中进行了严格的施工管理和作业控制,建立了集设计、科研、施工于一体的实时监测动态分析反馈系统。向家坝水电站工程实践中形成的设计、施工和项目管理原则和程序,可对类似工程起借鉴作用。

The underground powerhouse system of Xiangjiaba Hydropower Station has a huge scale and complex geological conditions. Based on a large number of studies, the construction procedures and supporting parameters for underground caverns, especially the main powerhouse, are determined. The strict managements and controls are adopted in the construction and the real-time monitoring and dynamic analysis system which integrating design, research and construction are established. The principles and procedures on design, construction and management can be as reference to constructing similar projects.