洪家渡水电站泄洪隧洞优化设计

洪家渡水电站泄洪隧洞的设计优化，经多种设计方案的比较论证，优选出适宜于该洞自然条件和运行要求的方案三。该方案降低了洞高，减少了工程量，节约了投资。出口采用斜鼻坎挑流消能，对解决狭谷消能问题，减轻水流对下游两岸冲刷，减少高边坡开挖具有较好效果，同时也改善了施工和运行条件。

Optimum Design for Discharge Tunnel of Hongjiadu Hydropower Station

Compared with several design schemes for discharge tunnel of Hongjiadu Hydropower Station,the third optimum scheme was selected because it is suitable for the natural conditions and operation requirement. And using the scheme makes the height of the tunnel lower, therefore the engineering quantity less and the construction more economic. Askew bucket lip for dissipation of energy at the end of tunnel would have good results for solving problems of dissipation and weakening bathing both of banks in narrow valleys,and reducing excavation of high-cut side,as well as improve construction and operation conditions.