水流作用下大直径墩柱周围局部冲刷实验OA北大核心
Experiments of local scour around large-diameter piers under currents
针对桥梁、港口水工建筑物以及近岸海洋结构墩柱基础稳定性问题,本文采用物理模型实验方法在较大宽度的造流水槽中开展了较大直径圆柱周围的局部冲刷研究.实验是在清水冲刷条件下进行的,实时观测了圆柱周围控制点的冲刷发展过程,观察到冲刷坑发展达到平衡历时最长近 10 d.结合实验结果对几个代表性冲刷坑深度预报公式进行了评价,发现Sheppard公式计算结果最接近实验.结果表明:在这种尺度下圆柱周围冲刷最大冲刷深度随摩阻流速的增大而增大,但受水深影响不大.对最大冲刷深度起控制作用的因素是摩阻流速,在冲刷预报公式中采用摩阻流速代替断面平均流速作为影响因素更为合理.
Local scour around piers is an important issue related to the stability of bridges,harbor hydraulic structures and offshore marine structures.In this paper,a large-width flume was used to investigate the local scour around large-scale cylinder under constant currents.The experiment was carried out for clear-water scour,in which the development process of scour pit at different control points was real-time observed and the maximum equilibrium scouring time took up to 10 days.It was observed that the maximum scour depth increased with the increase of friction velocity while the water depth had little effect.Based on the experimental data,several representative prediction formulas of scour depth were evaluated,and the equilibrium scouring time was found to be under-estimated by Sumer's formula.
王东;闫圣;李绍武
大连海事大学 环境科学与工程学院,辽宁 大连 116026||天津大学 水利工程智能建设与运维全国重点实验室,天津 300072大连海事大学 交通运输工程学院,辽宁 大连 116026天津大学 水利工程智能建设与运维全国重点实验室,天津 300072
水利科学
水流大直径墩柱清水局部冲刷大冲刷模型实验无粘性沙冲刷坑深度预报公式
currentslarge-diameter pierclear-water local scourlarge scaleexperimentcohesionless sandscour depthprediction formula
《哈尔滨工程大学学报》 2025 (4)
703-709,7
国家自然科学基金项目(52471269,52101299)中央高校基本科研业务费专项资金资助项目(3132024162)海底工程技术与装备国际联合研究中心开放基金(HG20240204)天津大学水利工程仿真与安全国家重点实验室开放基金(HESS-2113).
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