淮河干流临淮岗—鲁台子段航道整治

Channel regulation of main stream of the Huaihe River from Linhuaigang to Lutaizi section

淮河干流临淮岗—鲁台子段河道,河势复杂,洪水工况组合多,航道整治难度大。为了优化本段航道整治工程方案,针对河段特点,构建二维水动力数学模型,采用多场次洪水进行率定与验证,确定"以淮干为主"的洪水组合是对刘台子航道最不利的洪水组合,并模拟刘台子弯道段现状河道、弯曲半径480和550 m方案的流场进行对比分析。结果表明,在水流流态和横向流速方面,弯曲半径480 m方案优于550 m方案。淮河干流可通航水面宽度较大,可通过增加通航水域宽度来适当降低航道弯曲半径,方案对原河道改变较小,河势相对稳定,流态更加平顺,并节约工程投资。

The river regime and combination of flood conditions are complex from Linhuaigang to Lutaizi section of main stream of the Huaihe River,which increase the channel regulation difficulty.In order to optimize the channel regulation project of this section,we establish a two-dimensional hydrodynamic mathematical model of the river channel according to the characteristics of the river section,calibrate and verify the model by multiple floods,determine the flood combination of "mainly in the main stream of the Huaihe River" as the most unfavorable flood combination for Liutaizi channel,and simulate the flow field of the current channel,the schemes of 480 m and 550 m bending radius to compare and analyze.The results show that in terms of flow pattern and lateral velocity,the scheme of 480 m bending radius is better than that of 550 m bending radius. The main stream of Huaihe River has a large width of water surface, and the channel bending radius can be appropriately reduced by increasing the width of navigable water area.The scheme has the advantages of changing little to the original channel,stable river regime,flowing smoothly and saving investment.