明槽水流的非均匀沙挟沙力研究  

Study on graded sediment transport rate in stream

作　　者：王士强[1] 陈骥[1] 惠遇甲[1] 

机构地区：[1]清华大学

出　　处：《水利学报》1998年第1期1-9,17,共10页Journal of Hydraulic Engineering

基　　金：国家自然科学基金

摘　　要：本文从床沙、推移质及悬移质互相交换、衔接的物理图形出发，在力学、随机及紊动扩散分析基础上，提出了颗粒跃移及推移质、悬移质和全沙统一的新的非均匀沙挟沙力公式．文中公布了新近试验取得的５７组非均匀沙挟沙力水槽资料，分析提出了反映混合沙中粗细颗粒互相影响的系数的关系，提出了悬移层与推移层交界面高度及浓度预报新的初步关系．应用本文提出的挟沙力系列公式计算验证了大量天然河流及水槽实测分组和总挟沙力资料，计算与实际符合较好．A set of new equations are presented for predicting the saltation parameter, the sediment transport rate of bed load and the suspended load for each specific grain size group in a mixture. Fifty seven sets of test data on the transport capacity of graded sediment are published. The mutual effect of fine and coarse grains on transport rate is analyzed and the effect coefficient K D of non uniformity of a mixture is introduced and its expression is proposed. The calculated results from the author′s equations are in good agreement with the observed data.

关 键 词：非均匀沙 颗粒跃移 悬移质 水流挟沙力 水槽 

分 类 号：TV143.4[水利工程—水力学及河流动力学] TV146