复式河道滩槽泥沙粒径分布特性

发布时间：2018-05-22 09:27

本文选题：复式河道 + 主槽　；参考：《应用基础与工程科学学报》2016年04期

【摘要】：以实体模型概化水槽为基础,研究水深、含沙量及泥沙级配等因素对滩槽泥沙粒径分布的影响.复式河道滩槽泥沙粒径的分布一般具有进口悬沙粒径大于出口悬沙粒径、主槽床沙粒径大于滩地床沙粒径、主槽悬沙粒径大于滩地悬沙粒径以及床沙粒径大于悬沙粒径等基本特征;滩槽床沙粒径比随滩槽相对水深的增加而增加,但滩槽悬沙粒径比随相对水深的变化不大;滩槽床沙粒径比随着含沙量的增加而减小,粗颗粒泥沙的减小幅度要比细颗粒泥沙大,而滩槽悬沙粒径比随含沙量变化不大;滩槽悬沙粒径比及床沙粒径比均随着来沙粒径的增大而减小,滩槽床沙粒径比的变化幅度要大于悬沙粒径比的变化幅度.通过分析滩槽泥沙粒径分布的主要影响因素,建立了相应的经验公式.
[Abstract]:Based on the solid model, the effects of water depth, sediment content and sediment gradation on the distribution of sediment particle size are studied. The distribution of sediment particle size in the beach channel of the composite channel is generally larger than that in the outlet, and the diameter of the bed sediment in the main channel is larger than that in the beach bed. The particle size of suspended sediment in main channel is larger than that of suspended sediment in beach and bed sediment is larger than that of suspended sediment, while the ratio of suspended sediment in main channel increases with the increase of relative water depth, but the particle size ratio of suspended sediment in beach channel does not change with the relative water depth. The ratio of sediment diameter to sediment decreases with the increase of sediment content, the decrease range of coarse sediment is larger than that of fine sediment, but the ratio of suspended sediment is not changed with sediment content. The ratio of suspended sediment particle size and bed sediment particle size ratio decreased with the increase of sediment size, and the change range of beach bed sediment particle size ratio was larger than that of suspended sediment particle size ratio. Based on the analysis of the main influencing factors of the sediment particle size distribution in the beach channel, the corresponding empirical formula is established.
【作者单位】：中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;首都师范大学附属中学;
【基金】：流域水循环模拟与调控国家重点实验室(中国水利水电科学研究院)开放研究基金(2014ZY05) 首都师范大学附中研究性学习课题
【分类号】：TV147

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