摘要
为了探索梯形明渠中驼峰堰的水力特性,以陕西省三原西郊水库溢洪道工程为例,采用物理模型试验的方法,对梯形明渠驼峰堰的泄流量、过水断面、流量系数及变化规律、压力分布等水力特性进行了试验研究。结果表明:受梯形明渠驼峰堰顶水面宽度及过水断面增加的影响,梯形明渠驼峰堰较同底宽矩形明渠驼峰堰泄流量大;但两者流量系数及其变化规律较为接近;堰面压强分布规律基本相同。提出了梯形明渠驼峰堰顶平均水面宽度的计算方法和流量系数的计算公式。对同类工程有借鉴参考价值。
In order to research the hydraulic characteristics of camel-hump weir in a trapezoidal open channel,in view of the flood spillway of Xijiao Reservoir of Sanyuan in Shaanxi Province,the discharge amount,cross-section,discharge coefficient and its variation laws,pressure distribution are studied by physical model.The research results show that for the increment of crest width and cross-section,the discharge capacity of camel-hump weir in the trapezoidal open channel is larger than that of a rectangular open channel with the same bottom width,and the discharge coefficient and its variation laws of the two weirs are similar and the pressure distributions on weir surface are basically the same.The calculation method and formula for average flow width on the crest and discharge coefficient of camel-hump weir in the trapezoidal open channel are suggested.
出处
《人民长江》
北大核心
2011年第9期87-89,共3页
Yangtze River
关键词
驼峰堰
梯形明渠
过水断面
泄流量
流量系数
压强分布
camel-hump weir
trapezoidal open channel
flow cross-section
discharge amount
discharge coefficient
pressure distribution
