| 波浪作用下斜坡沙质海床上桩柱周围局部冲刷试验研究 |
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| 引用本文： | 程永舟,唐雯,李典麒,黄筱云,夏波.波浪作用下斜坡沙质海床上桩柱周围局部冲刷试验研究[J].水科学进展,2018,29(2):260-268. |
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| 作者姓名： | 程永舟 唐雯 李典麒 黄筱云 夏波 |
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| 作者单位： | 1.长沙理工大学水利工程学院, 湖南长沙 410114; |
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| 基金项目： | 国家自然科学基金资助项目（51679015；41176072） |
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| 摘 要： | 在斜坡上桩柱引起的局部冲刷与平底条件下产生的冲刷存在差异。布置中值粒径为0.320 mm、坡度为1:16的斜坡沙床，开展规则波作用下桩柱周围的局部冲刷试验研究。试验主要考虑小Keulegan-Carpenter数（KC数）条件，探讨了波高、波周期和桩柱位置对局部冲刷的影响，并从最大冲刷深度和冲刷形态两个方面对比分析了斜坡与平底条件局部冲刷的异同。结果表明:斜坡上桩柱位置对局部冲刷有较大影响；在相同的KC数条件下，斜坡沙床上的最大冲深大于平底沙床；斜坡沙床的清水冲刷形态与平底沙床差异较大，而浑水冲刷形态相似。
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| 关 键 词： | 斜坡沙床 桩柱 局部冲刷 冲刷形态 |
| 收稿时间： | 2017-07-03 |
Experimental study on local scour around the pile on the sandy seabed under wave action |
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| CHENG Yongzhou,TANG Wen,LI Dianqi,HUANG Xiaoyun,XIA Bo.Experimental study on local scour around the pile on the sandy seabed under wave action[J].Advances in Water Science,2018,29(2):260-268. |
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| Authors: | CHENG Yongzhou TANG Wen LI Dianqi HUANG Xiaoyun XIA Bo |
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| Affiliation: | 1.School of Hydraulic Engineering, Changsha University of Science and Technology, Changsha 410114, China;2.Key Laboratory of Water and Sediment Science and Water Hazard Prevention, Changsha 410114, China |
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| Abstract: | The local scour caused by a pile on a slope differs to that at the flat sand bed. A 1:16 slope with sediment median size of 0.32 mm was set up, and an experimental study of local scour around the pile under the action of regular wave was conducted. Under the condition of small KC number, effect of wave height, wave period and pile position were discussed, and similarities and differences between local scour on the slope and at the flat were compared and analyzed from two aspects of maximum scour depth and scour profiles. It is shown from experimental results that the pile position at the slope brings a great influence to the local scour character; Under the same KC number, the maximum scour depth on the slope is greater than that at the flat sand bed; A distinguishing profile is displayed between clear-water scour on the slope and at the flat sand bed, but no obvious distinction is exhibited during muddy-water scour. |
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| Keywords: | slope sand bed pile local scour scouring pattern |
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