Abstract: After emptying of the pressure diversion tunnel, the pressure change would cause great risk of collapse of the tunnel. Thus, strict requirements are put forward on the drainage process. This paper introduces the emptying scheme for the diversion tunnel of Huaguangtan hydropower station, for reference.

Key words: diversion type power station, diversion tunnel, emptying

摘要： 有压式引水隧洞放空后，隧洞内外压力变化较大，存在着较大的坍塌风险，对排水过程有极其严格的要求。对华光潭水电站一级站引水隧洞排空方式进行了介绍，对同类型水电厂引水隧洞排空方案研究具有一定的借鉴作用。

关键词: 引水式水电站, 引水隧洞, 排空