| 桥梁阻水水头损失计算方法比较 |
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| 作者姓名： | 陈瑞方 |
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| 作者单位： | 上海勘测设计研究院有限公司, 上海 200434 |
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| 基金项目： | 水利部公益性行业科研专项经费项目( 201301076) |
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| 摘 要： | 河道水流经过桥墩时, 由于桥墩的阻碍作用, 将产生一定的水头损失。对于本身水力坡降就不大的平原地区
河道, 桥墩阻水引起的水头损失对河道过水能力的影响是至关重要的。通过对 D cAubuisson 公式、 Yarnell 公式、
Henderson 公式、 铁科院李付军公式和无坎宽顶堰公式等常用桥墩壅水计算公式的分析比较, 结合水工模型试验结
果, 认为 Yarnell 公式、 无坎宽顶堰公式的计算结果可以较好的反映桥墩阻水引起的水头损失。
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| 关 键 词： | 桥墩 桥梁壅水 水头损失 河道过水能力 |
Analysis of calculation method of head loss caused by bridge |
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| Authors: | CHEN Rui-fang |
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| Affiliation: | Shanghai Investigation, Design & Research Institute Co. , Ltd, Shanghai 200434, China |
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| Abstract: | Bridge pier in river will obstruct the flow and may cause a certain head loss. The head loss caused by the bridge pier will affect the river
flow capacity, especially for the river that hydraulic gradient is smaller in the plain area. How to calculate the head loss? According to the hy2
draulic model test results, through the analysis of calculation results of the commonly bridge backwater calculation formula, such as DcAubuisson
formula, Yarnell formula, Henderson formula, Li2fujun formula and broad crest ridge free weir flow formula etc, that the formula of Yarnell,
broad crest ridge free weir flow formula can better apply to the calculation of water head loss caused by bridge. |
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| Keywords: | bridge pier bridge backwater water head loss river flow capacity |
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