三峡库区细沙输移运动状态的水槽试验研究

发布时间：2018-06-17 00:51

本文选题：三峡水库 + 常年回水区　；参考：《长江科学院院报》2017年05期

【摘要】：三峡库区内淤积泥沙均属细颗粒泥沙范畴,运动规律较为复杂。依靠传统泥沙理论即以挟沙力为判断标准,所得冲淤情况与实际观测情况有所出入,需进行进一步研究。在三峡库区典型淤沙河段——皇华城河段现场观测的基础上,通过水槽试验研究库区细颗粒泥沙的运动特点,对不同水深流速下细颗粒泥沙的运动状态进行归类整理,发现其淤积过程可根据水深与流速的不同划分为3个区域,即冲刷区、相对平衡输送区及淤积区,并指出用流速作为判断细沙输移状态的标准更符合库区实际冲淤情况。
[Abstract]:The silt accumulation in the three Gorges reservoir area belongs to the fine grain sediment category, and the movement law is more complex. Depending on the traditional sediment theory, the sediment carrying capacity is taken as the criterion, and the result of scour and deposition is different from the actual observation, so it needs further study. On the basis of field observation of typical silt reach-Huanghuacheng reach in the three Gorges Reservoir area, the movement characteristics of fine grain sediment in the reservoir area are studied by flume test, and the movement state of fine grain sediment under different water depth velocities is classified and sorted out. It is found that the siltation process can be divided into three regions according to the difference of water depth and velocity of flow, namely, scour area, relative equilibrium transport area and siltation area. It is pointed out that the velocity of flow as the criterion for judging the state of fine sand transport is more in line with the actual situation of scour and siltation in the reservoir area.
【作者单位】：重庆交通大学国家内河航道整治工程技术研究中心;徐州市水利科学研究所;
【基金】：国家重点研发计划项目(2016YEC0402104) 重庆市研究生科研创新项目(CYS16175)
【分类号】：TV149

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