锦屏电站支洞大坡度大流量反坡排水施工技术

Large Slope and Flow Reverse Slope Drainage Construction Technique of Jingping Power Station Adit

锦屏电站辅引3号支洞施工中出现大流量涌水,给施工带来安全隐患并影响施工进度。通过对涌水状况分析,在大流量且反坡条件下,采用分级设置水仓排水方式,合理选择各类水泵和设置管路,解决了施工排水问题。

Large water flow was found in Auxiliary 3# tunnel of Jingping Power Station, which brings security risks and de- lay the construction progress~ Based on the analysis of water inflow,in the condition of the large flow and reverse slope con- ditions, the hierarchical sump drainage was arranged along with reasonable selection of various types of pumps and piping; it solves the problem of the construction of drainage, which provides experience for the construction of similar projects.