大石涧水库溢流坝挑流消能工设计创新  

Innovation of Energy Dissipation Design for Overfall Dam of Dashijian Reservoir

作　　者：张桂花 胡士辉[2] ZHANG Gui-hua;HU Shi-hui(Henan Water and Power Engineering Consulting Co.,Ltd.,Zhengzhou 450016,Henan Province,China;Hydrology Bureau,YRCC,Zhengzhou 450004,Henan Province,China)

机构地区：[1]河南省水利勘测设计研究有限公司,河南郑州450016 [2]黄河水利委员会水文局,河南郑州450004

出　　处：《中国农村水利水电》2022年第12期137-142,149,共7页China Rural Water and Hydropower

基　　金：2019年度水利厅科技攻关项目(GG201912)。

摘　　要：针对大石涧水库工程上下游水位落差大、坝址区开阔、消能段河谷狭窄的特点,依据数值模拟分析调整挑流鼻坎各项参数,通过整体物理模型试验验证,确定溢流坝设计采用一种舌瓣鼻坎挑流新体型。试验表明:舌瓣新型消能工,通过3个不同半径的舌瓣来调整水流落点,增加了水舌挑距,避免了水舌集中冲刷河床,减轻护坦基础冲刷及两岸淘刷强度,消能防冲效果最佳。In view of the characteristics of Dashijian Reservoir Project,such as large water level difference between upstream and downstream,wide dam site area and narrow valley in energy dissipation section,this paper adjusts various parameters of the spillway noseway according to numerical simulation analysis and verifies the whole physical model test,and determines that a new type of the spillway is designed with tongue flap-shaped noseway.The experiment shows that the new type of tongue damper can adjust the water drop point through three different radii of tongue,increase the distance of tongue,avoid the concentrated scouring of river bed by tongue,reduce the scouring of foundation of guard tank and scouring intensity of both sides,and achieve the best effect of energy dissipation and anti-scour.

关 键 词：舌型鼻坎 溢流坝 扩散消能 集中冲刷 

分 类 号：TV213.4[水利工程—水文学及水资源]