强潮流作用下桥墩不对称“双肾型”冲刷地貌特征与机理

陆雪骏; 程和琴; 周权平; 姜月华; 郭兴杰; 郑树伟; 吴帅虎

doi:10.3969/j.issn.0253-4193.2016.09.012

强潮流作用下桥墩不对称“双肾型”冲刷地貌特征与机理

doi: 10.3969/j.issn.0253-4193.2016.09.012

1.
华东师范大学河口海岸学国家重点实验室, 上海 200062
2.
中国地质调查局南京地质调查中心, 江苏南京 210016

基金项目: 国家自然科学基金（41476075）；沿长江重大工程区地质环境综合调查（下游）子项目（12120115043101）。

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出版历程
- 收稿日期: 2015-11-18
- 修回日期: 2016-01-11

Features and mechanism of asymmetric double-kidneys scoured geomorphology of pier in tidal estuary

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
2.
Nanjing Geological Survey Center, China Geological Survey, Nanjing 210016, China

摘要

摘要: 本文在海图地形资料分析桥轴线附近的海床自然冲刷的基础上，利用多波束测深技术研究大桥主墩附近局部冲刷地形。结果表明，该大桥桥位附近地形冲刷较显著，且大桥主墩位置有持续冲刷的趋势；主墩上、下游群桩最大冲刷深度呈上游最深、中部淤积、下游渐深的不对称形态，最大局部冲刷深度为4 m；桥墩整体冲刷坑形态呈南北“双肾型”；潮流流向与桥墩迎流面存在偏南的入射角，使得各桥墩南侧的最大冲深和冲刷范围均大于北侧。
- 局部冲刷 /
- 双向流 /
- 多波束 /
- 桥墩 /
- 上海长江大桥
Abstract: Based on analyzing the natural scour near the axis of the bridge by data of topographical, this paper used a multi-beam echo-sounding system to study local scour around bridge piers. The results showed that the axis of the bridge and the riverbed near main piers presents erosion evolutionary trend. Upstream the pier, there is a serius erosion while sediments deposit at the mid of pier. Downstream the pier, weak erosion is also found. The largest scour depth of the main pier is about 4 m. The local scour shape of the main pier looks like "double kidneys". The angle of ebb coming current is 10 degree, as well as the scour depth and scope on the south side of the main pier is larger than that on the north.
- reversing tidal current /
- local scour /
- multi-beam echo sounder /
- bridge pier /
- Shanghai Yangtze River Bridge

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