向家坝水电站大型地下厂房洞室群施工和监测

 金沙江向家坝水电站地下厂房规模庞大，具有结构尺寸大、地质条件复杂、支护工程量大、施工干扰大等特点。通过大量的科研设计，确定地下洞室群尤其是主厂房的施工程序和支护参数。在施工过程中采用精细化管理对施工进行严格控制，建立设计、科研、施工一体化的实时监测动态分析反馈系统。开挖结束后，主厂房围岩变形趋于稳定，顶拱最大变形13.36 mm，边墙最大变形6.74 mm，均小于设计计算值(顶拱最大位移20.4 mm、边墙最大位移62.5 mm)，并小于国内同类工程。总结向家坝水电站大型地下厂房洞室群施工实践中形成的设计、施工和项目管理原则和程序，对类似工程具有指导和借鉴作用。

CONSTRUCTION AND MONITORING STUDY OF LARGE UNDERGROUND POWERHOUSE CAVERNS OF XIANGJIABA HYDROPOWER STATION

The underground powerhouse in Xiangjiaba Hydropower Station has a huge scale,with the characteristics of complex structure,complicated geologic condition,large support quantities and big construction disturbance.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 a real-time monitoring and dynamic analysis system which integrates d...