吉沙水电站低压引水隧洞关键技术问题研究

Study on Key Technical Issues for Constructing the Diversion Tunnel of Jisha Hydropower Station

高原地区河流比降大,通过发电引水隧洞对河道裁弯取直引水,通常能充分利用水头,取得很好的发电效益,此类型电站建设的最关键之处往往是低压引水隧洞的设计与施工。云南硕多岗河吉沙水电站是一座典型的高原长引水式中型水电站,在设计过程中对关键技术问题认真研究,提出合理方案并及时进行了优化。总结该电站低压引水隧洞设计、施工和建设管理的经验教训,对日后类似工程的设计有很好的借鉴意义。

The rivers in plateau area often have larger gradient, and the hydro development can achieved a good benefit by tunnel for straightening the water diversion and using the water head. The key for constructing this kind of hydropower stations is the design and construction of low-pressure diversion tunnel. The Jisha Hydropower Station in Shuoduogang River in Yunan is a typical diversion-type medium-sized hydropower development in plateau area. The key technical issues are studied in the design of Jisha Hydropower Station, and the reasonable design and its optimization is also proposed. The experiences in the design, excavation and construction management of the Station can be as references to similar projects.