弯槽冰塞水位试验研究

发布时间：2018-04-21 02:25

本文选题：冰塞 + 弯槽　；参考：《人民黄河》2017年11期

【摘要】：冰塞的出现造成河道上游水位壅高,常诱发凌洪灾害。天然河道并非理想直线而是蜿蜒曲折的,冰塞的堆积演变过程更为复杂,研究弯道冰塞水位变化规律对于北方河流的防凌工作具有重要意义。通过S形弯槽试验,分析弯槽冰塞水位变化特点及规律,并与直槽和天然河道进行对比。试验结果表明:冰塞水位壅高滞后于冰塞的增厚过程,且平衡冰塞水位增值随冰塞厚度的增加而增加,平衡冰塞水位相对增值随弗劳德数的增大而递减,弯槽平衡冰塞水位相对增值与直槽相比增幅较小。
[Abstract]:The appearance of ice slug often causes flood disaster in the upper reaches of the river. The natural channel is not an ideal straight line but winding and winding, and the accumulation and evolution process of ice plug is more complicated. It is of great significance to study the variation law of water level of ice slug in curved channel for the anti-ice work of northern rivers. The characteristics and laws of water level change of ice slug in curved channel are analyzed through S-shaped bend channel test, and compared with straight channel and natural channel. The experimental results show that the thickening process of Yu Bing plug is delayed by the high water level of ice slug, and the increment of water level of equilibrium ice plug increases with the increase of the thickness of ice plug, and the relative increment of water level of equilibrium ice plug decreases with the increase of Froude number. The relative increment of the water level of the equilibrium ice plug in the curved channel is smaller than that of the straight trough.
【作者单位】：合肥工业大学土木与水利工程学院;
【基金】：国家自然科学基金资助项目(51379054)
【分类号】：TV875

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