龙滩水电站引水系统工程施工支洞的设计方案

The Construction Branch-hole Design of Water Diversion System Engineering of the Longtan Hydropower

龙滩水电站引水系统与坝肩边坡开挖交叉作业,安全问题突出。引水隧洞包括上平段、上弯段、斜(竖)井、下弯段、下平段,存在引水隧洞间距小、工期紧、机组发电顺序与施工支洞的封堵顺序相反、施工干扰大等问题,施工支洞的布置尤其重。通过施工支洞的合理布置,在满足工期、质量、安全前提下,同时优化了施工支洞平面布置,减小了开挖的工程量,为工程节约了投资。龙滩水电站地下厂房引水系统施工支洞的设计方案,成功地解决了施工干扰,为按期进行压力钢管的安装提供了有利条件。

The security issues of water diversion system and the abutment of Longtan Hydropower Station cross-slope excavation operations are fundamental.The diversion tunnel includes five parts which are the flat section,the upper curved section,the oblique(vertical)wells,the lower curved section,the next flat section. There exist some serious problems such as short diversion tunnel interval,tight schedule,the order of generating units opposite to the order of plugging holes in construction and strong interference in...