河湾岸坡泥沙起动流速研究  

Incipient velocity of sediments on bank slope of river bends

作　　者：童思陈[1] 许光祥[1] 

机构地区：[1]重庆交通大学河海学院,重庆400074

出　　处：《水利学报》2008年第11期1167-1173,共7页Journal of Hydraulic Engineering

基　　金：交通部科技项目(200432981413)

摘　　要：通过对河湾岸坡上泥沙颗粒的受力分析,建立了相关的泥沙起动模式,从理论上推导出了对应的起动流速公式。与顺直河床的泥沙起动公式的比较表明,沙莫夫公式只是本文公式的特例。在概化的河湾岸坡水力学模型上,系统研究了不同弯道半径、水深、流量及岸坡坡度情况下泥沙的起动流速。通过验证比较表明,用本文所给公式计算的河湾岸坡泥沙起动流速与试验实测资料和前人的研究成果基本一致。The incipient velocity formula of sediment on bank slope of river bends is established based on the analysis on the forces acting on the particles. The comparison with the formula for sediment on straight riverbed shows that the Sharmov formula in only a special case of the proposed formula. Furthermore, the incipient velocity of sediment in conceptual fiver bends with different radii, water depths, discharges and bank slopes is investigated. The formula is in good agreement with experimental data obtained from physical model test and given by predecessors.

关 键 词：弯道 坡岸 泥沙 起动流速 试验研究 

分 类 号：TV142[水利工程—水力学及河流动力学]