水利水电技术2018，Vol.49Issue(4)：63-69,7.DOI:10.13928/j.cnki.wrahe.2018.04.010
燕尾型挑坎在李家岩水库溢洪道中的应用
Application of leak-floor flip bucket to spillway for Lijiayan Reservoir
摘要
Abstract
Aiming at the problem of downstream energy dissipation and erosion control of Lijiayan Reservoir,the characteristics of the downstream water-jet nappes and river channel scouring patterns from both the conventional continuous flip bucket and new type of leak-floor flip bucket are compared through a 1:30 hydraulic model experiment.The experiment result shows that the leak-floor flip bucket is more adaptable to the upstream inflow with a smaller discharge of starting ski-jump.Under the condition of leak-floor flip bucket,the degree of the deviation of the water-jet nappe bottom edge from the bottom slab is increased along with the increase of the discharge per unit width,which makes the near-end ski-jump distance smaller.Compared with the continuous flip bucket,the transverse diffusion of the water-jet nappe from the leak-floor flip bucket is obviously weakened and sufficiently stretches along the flow direction,while the entire range of the nappe falling point is long and narrow and avoids scouring the narrow plunge pool or both the river banks consequently,thus the leak-floor flip bucket is more suitable for narrow valley.Compared with the continuous flip bucket,the water-falling range of the jet-nappe from the leak-floor flip bucket is stretched,and then the unit discharge of inflow is effectively decreased,from which both water fluctuation and scouring of the downstream channel are weakened to some extent.The shape design principles and the related study results of the leak-floor flip bucket summarized in accordance with the relevant experiments and similar projects can provide references for the other projects concerned.关键词
燕尾型挑坎/挑射水舌/体型设计Key words
leak-floor flip bucket/water-jet nappe/type design分类
水利科学引用本文复制引用
程文磊,杨庆,昌子多..燕尾型挑坎在李家岩水库溢洪道中的应用[J].水利水电技术,2018,49(4):63-69,7.基金项目
国家重点研发计划课题(2016YFC0401707) （2016YFC0401707）
