摘要
实际工程运行经验表明,当泄洪冲沙闸宣泄造床流量时,库区不产生壅水、保持天然流态泄水冲沙,库区河道主槽才有可能恢复到天然河道状态,本文根据水流连续公式、水流阻力公式和输沙公式,并引入最小能耗率原理,导出主槽河相关系。应用此关系式计算出闸前主槽水深,流速,并将其代入堰流公式进行水力学计算,求得泄洪冲沙闸宽度。
The calculation of the outlet sluice width is an important part in design of the project. But there are a lot of problems in the calculation methods commonly used, and can not meet the needs of the outlet sluice. This paper presents a new calculation method of the outlet sluice width. A lot of practical experiences have proved that the upstream channel of sedimentation can be restored to the natural river channel only when the bed--forming discharge is released by the outlet sluice, the backwater caused by the project does not occur, and the natural flow is kept. In this paper, the theory of minimum rate of energy dissipation was applied together with flow continuity equation、flow resistance equation and sediment transport equation to obtain the regime relations, by which the flow depth and flow velocity can be calculated. Once the depth and velocity are substituted into the weir formula, the outlet sluice width is obtained.
出处
《泥沙研究》
CSCD
北大核心
1993年第4期65-71,共7页
Journal of Sediment Research
