迷宫堰及阶梯式泄水陡槽在六道河水电站中的应用

Application of Labyrinth Weir and Stepped Outlet Chute in Liudaohe Hydropower Station

六道河水电站前池布置单侧溢流堰,由于前池长度较小,采用常规堰型不能满足泄流要求,迷宫堰可延长溢流长度,当堰上水头较低时,泄流能力较直线型堰明显增大,工程中采用了迷宫堰形式。迷宫堰后的泄水陡槽由于受到已有建筑物与当地地形条件的限制,采用常规泄水陡槽无法满足泄流消能要求,因此在空间有限的前提下采用了阶梯式泄水陡槽。本文介绍了六道河水电站中迷宫堰和阶梯式泄水陡槽的水力设计和结构设计方法,在阶梯式消能工的计算中采用了数值计算方法进行验证。

Because the labyrinth weir extends the overflo~ length and increases the discharge capacity when the water head is low, it is a good choice for Liudaohe hydropower station. With the overflow chute is limited by the construction built, water head is high and chute of step type is applied for Liudaohe project. In the paper, the method of hydraulic and structural design of labyrinth weir and stepped of outlet chute is introduced. Numerical calculation is used to identify the hydraulic design for the energy dissipation.