东庄水利枢纽工程溢流表孔消能方式  

Energy Dssipation Method of Overflow Surface Hole of Dongzhuang Water Conservancy Project

作　　者：刘新云 仵凡 耿玉龙 LIU Xinyun;WU Fan;GENG Yulong(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《河南水利与南水北调》2024年第10期52-53,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：东庄水利枢纽工程所处河道狭窄,坝身排沙泄洪孔口布置紧凑,泄洪建筑物出口既要求消能充分,又要尽量降低泄洪雾化对两岸岸坡及建筑物的不利影响。针对溢流表孔出口消能方式及体型优化,设计单位联合天津大学、南京水利科学研究院,结合水工模型试验从宽尾墩+跌流、跌流+挑流、宽尾墩+跌流+挑流、窄缝+底板镂空+跌流等几个方向做了大量的研究工作。为使表孔出口水舌空中扩散消能、落水点纵向拉开、分散入水,以减小水垫塘底板冲击压强及脉动压强峰值,并尽量减少雾化影响,溢流表孔最终采用窄缝+底板镂空+跌流的联合消能方式。The Dongzhuang Water Conservancy Project is located in a narrow river channel,and the sediment ejection and flood releasing orifices are compactly arranged in the dam body,so the exit of the flood releasing structure not only requires sufficient energy dissipation,but also should reduce the adverse impact of flood discharge atomization on the bank slope and buildings on both sides as much as possible.For the purpose of optimizing the energy dissipation mode and body shape of the outlet of the overflow surface hole,a lot of research work have been conducted by the design institute together with Tianjin University and Nanjing Institute of Hydraulic Sciences,based on hydraulic model tests,including wide-flange pier+drop flow,drop flow+deflecting flow,wide-flange pier+drop flow+deflecting flow,narrow slit+base slab hollowing+drop flow.In order to make the nappe from the surface hole diffuse for energy dissipation in the air and disperse into water,so as to reduce the impact pressure and pulsation pressure peak of the bottom plate of plunge pool,and minimize the impact of atomization,the joint energy dissipation mode of narrow slit+base slab hollowing+falling flow is finally adopted for the overflow surface hole.

关 键 词：溢流表孔 出口消能 宽尾墩 窄缝 底板镂空 

分 类 号：TV135[水利工程—水力学及河流动力学]