对水闸设计问题的补充讨论之二——水闸底流消能水力设计  

Supplementary Discussion on the Design of Sluice (Ⅱ)

作　　者：茹建辉[1] RU Jianhui(Water Resources Department of Guangdong Province,Guangzhou 510635,China)

机构地区：[1]广东省水利厅,广州510635

出　　处：《广东水利水电》2023年第1期1-8,共8页Guangdong Water Resources and Hydropower

摘　　要：通过分析工程案例,提出水闸设计时应选取变化稳定后的下游水位流量关系曲线族中的下包络线,作为设计的下游水力边界,并选水闸泄流与下游水位最不利的遭遇作为消能设计条件。文中提出了底流消能下游水力边界的近似方法,并指出,仅用下游水深大于临界水深作为消能条件是不当的,不重视海漫的水力设计是大量水闸工程破坏始于海漫的根本原因;某些规范条文称消力池设计得当可消杀能量的40%~70%是错误的,合理设计消能设施的消能率可接近100%。This paper pointed out that the lower envelope of the stage-discharge relation curve family after their change was stable ought to selected as the downstream hydraulic boundary of the design, and the most unfavorable encounter between sluice discharge and downstream water level was selected as the energy dissipation design condition.An approximate method for the downstream hydraulic boundary of bottom flow energy dissipation is proposed.It is also pointed out that it is not appropriate to use the downstream water depth greater than the critical water depth as the energy dissipation condition.Neglecting the hydraulic design on pitching behind the pool is the fundamental reason that a large number of sluice works are damaged from the pitching.It Is improper to say that properly design dissipation facilities can only eliminate 40 to 70 percent of the energy in some specification. In fact properly designed facilities can eliminate nearly 100 percent of the energy.

关 键 词：底流下游水力边界 海漫段水力设计 底流消能的消能率 

分 类 号：TV66[水利工程—水利水电工程]