漫湾水电站泄洪消能方案的选择

Selection of Flood Releasing and Energy Dissipation Structures of Manwan Hyropower Station

漫湾水电站泄洪建筑物采用“五表二底一洞”的布置方案,具有泄洪频繁、流量大、能量大、历时长和弯道消能的特点。通过与厂前窄缝方案的对比试验,表孔溢洪道最终确定采用厂前双层差动扩散挑流的消能方式,配合对冲坑进行全面预挖和钢筋混凝土保护的水垫塘方案,消能效果较好。

The flood releasing structure of Manwan hydropower station consists of five surface spillways, two low-leveled outlets and one spillway tunnel. The structure featured with its frequent functioning, large discharge, great energy and high duration during flood releasing and possibility of energy dissipation by river bend. As a result of comparison with the slit-type flip bucket the double differential diffusion deflecting bucket was selected. A good effect is given by the selected bucket combined with pre-excavation of the erosion pit and protection of water cushion basin by reinforced concrete.