180°急转弯桥墩周围的冲刷模式：非恒定水流作用下桥墩形状的影响

IF 2.8 3区环境科学与生态学 Q2 WATER RESOURCES

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques Pub Date : 2023-07-13 DOI:10.1080/02626667.2023.2236089

Saman Solati, M. Vaghefi, G. Ahmadi

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引用次数: 0

摘要

摘要研究了非定常水流对桥墩冲刷的影响。在100分钟的洪水持续时间内，9种桥墩形状、3个180°弯道安装位置、4种洪水持续时间和4种上升翼与洪水持续时间的比率进行了测试。总的来说，包括在没有桥墩的弯道中进行的7次试验，共进行了196次试验。流动速度范围从运动阈值到活床情况。结果表明:不同形状桥墩前最大冲洞深度是洪水持续时间的函数，升支与降支之比对桥墩周围最终最大冲洞深度影响不大;尾孔体积受鼻翼和桥墩截面形状的影响。对于矩形桥墩，冲孔体积大于其他桥墩。计算平均形状系数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Scour pattern around a pier in a 180° sharp bend: influence of pier shape under unsteady currents

ABSTRACT The effect of unsteady currents on scour at piers was investigated. The tests were run for nine pier shapes, three installation positions along a 180° bend, four flood durations, and four ratios of rising limb to flood duration for the 100-minute flood durations. Overall, including seven tests performed in the bend without piers, 196 tests were performed. The flow rapidity ranged from the movement threshold to live bed situations. The results indicated that the deepest scour-hole in front of the piers with different shapes was a function of flood duration and the ratio of ascending branch to descending branch had little effect on the final maximum scour-hole depth around the pier. The scour-hole volume is affected by the nose and the cross-sectional shape of the pier. For the rectangular pier, the scour-hole volume is greater than that of the other piers. The average shape coefficient was calculated.

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来源期刊

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques 环境科学-水资源

CiteScore

6.60

自引率

11.40%

发文量

144

审稿时长

9.8 months

期刊介绍： Hydrological Sciences Journal is an international journal focused on hydrology and the relationship of water to atmospheric processes and climate. Hydrological Sciences Journal is the official journal of the International Association of Hydrological Sciences (IAHS). Hydrological Sciences Journal aims to provide a forum for original papers and for the exchange of information and views on significant developments in hydrology worldwide on subjects including: Hydrological cycle and processes Surface water Groundwater Water resource systems and management Geographical factors Earth and atmospheric processes Hydrological extremes and their impact Hydrological Sciences Journal offers a variety of formats for paper submission, including original articles, scientific notes, discussions, and rapid communications.