枢纽下游河床冲刷深度估算方法  

Estimation method of scouring depth of lower reach of hydro-junction

作　　者：乐培九[1] 程小兵[1] 朱玉德[1] 崔喜凤[1] 

机构地区：[1]交通部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456

出　　处：《水道港口》2007年第2期96-102,共7页Journal of Waterway and Harbor

摘　　要：根据沙量守恒原理,从宏观上建立了清水冲刷深度估算公式。公式涉及到床沙可悬百分数;推移质单宽率输沙量及其变化过程;冲刷过程中水流条件的变化;粗化层厚度及其级配等疑难问题。通过水槽试验和理论分析给出了这些问题的计算关系式,获得了冲刷深度估算方法。经试验资料检验,精度良好。According to the principle of the sand amount conservation, the estimation formula of clear water scouring depth is built. Some problems are involved such as the percentage of suspend bed sediment, bed load sediment discharge per unit width and its variable process, the variation of flow conditions during erosion, the thickness and the graduation of armoring bed materials. The formulas about these influence factors are provided, and then the estimation method of scouring depth is achieved according to the flume experiment and theory analysis. The results calculated by the formula are well consistent with the experiment available.

关 键 词：冲刷深度 床沙可悬粒径 推移质输沙率 动床水流阻力 

分 类 号：TV142[水利工程—水力学及河流动力学]