桥巩水电站泄水闸消能防冲设计要点综述

Overview on Design of Energy Dissipation and Erosion Control for Release Sluice of Qiaogong Hydropower Station

利用桥巩水电站泄水闸河床地形特征,布置高低两种戽式消力池。由于深河槽低戽底板厚度较大,为在底板设窄缝提供了有利条件,故在深河槽低戽的戽底设窄缝进行混合消能。经水工模型试验验证,水流消能效果良好;其体型结构简单新颖,并具有自行清理消力戽推移质的功能,也为收缩式消能原理应用在低坝上作出了新的探索。

High and low bucket basins are arranged by taking advantage of topographic conditions underlining river bed at release sluice of Qiaogong Hydropower Station. A mixed way of energy dissipation is adopted as the thick bottom plate of the low bucket at deep river channel is favorable to provide narrow slot on it. Hydraulic model test is done to achieve sound effect of flow dissipation. Such design characterized by simple and novel structure is able to self remove bed load of bucket basin, which is a new attempt to do contraction energy dissipation at low dam.