除险加固水闸的消能防冲措施

发布时间：2018-02-26 20:28

本文关键词： 除险加固水闸消能防冲分隔墩　出处：《水利水电科技进展》2017年04期 　论文类型：期刊论文

【摘要】：基于某除险加固工程水力学模型试验,通过对闸下水流流态、流速分布、特征断面垂向最大平均流速以及冲刷特性的观测,分析了设计方案条件闸下水流流态恶化及冲刷严重的原因,即下游翼墙加固改变了水流的边界条件,导致出闸水流受到边界挤压而主流集中,局部流速增大,冲刷加剧。通过不同消能防冲方案的试验比较,提出了利用分隔墩消除出闸水流集中的现象;分隔墩消除了主流受边界挤压现象,起到了改善闸下水流流态,均化闸下水流流速分布,降低河床最大流速,减轻闸下冲刷的作用,且体型结构简单,易于施工。
[Abstract]:Based on the hydraulic model test of a reinforcement project, the flow state, velocity distribution, vertical maximum average velocity and scour characteristics of sluice water were observed. In this paper, the reasons for the deterioration and erosion of sluice sluice flow are analyzed, that is, the reinforcement of downstream wing wall changes the boundary conditions of the flow, resulting in the flow of sluice gate being squeezed by the boundary and concentrated in the mainstream, and the local velocity of velocity increases. Through the experiment comparison of different energy dissipation and scour prevention schemes, it is put forward that the separation pier is used to eliminate the phenomenon of the current concentration in the gate, and the separation pier eliminates the phenomenon of the main stream being squeezed by the boundary, which improves the sluice water flow state. The distribution of the flow velocity under the homogenization sluice reduces the maximum velocity of the river bed and reduces the effect of the scour under the sluice. The structure is simple and the construction is easy.
【作者单位】：江苏省洪泽湖大堤高良涧闸加固工程建设处;河海大学水利水电学院;
【分类号】：TV653;TV698.22

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