摘要
文章从冲刷机理、物理模型试验、数值模拟与理论分析以及现场实测四个方面对水下垂直桩柱局部冲刷的研究工作进行了回顾与分析,系统阐述了水下垂直桩柱发生局部冲刷的物理机制,总结了可考虑不同流动条件的平衡冲刷深度经验预报公式。通过分析发现,根据已建立的经验预报模型分析计算得到的冲刷深度往往与现场实测数据存在较大的差异,其根本原因在于目前的经验公式基本都是基于松散均匀沙所建立的,难以考虑工程现场常见的粘性土的输运和冲刷特性。因此需要开展更加深入系统的研究工作,建立更加准确有效的局部冲刷分析预报模型,为水下结构的安全运行提供科学依据和技术保障。
The previous studies on local scour around the vertical piles are reviewed and investigated,in terms of scour mechanism,physical test,numerical simulation and theoretical analysis.The physics of the local scour is presented in the present paper and the empirical prediction equations of equilibrium scour depth under various flow conditions are summarized.A significant difference is found in scour depth between the value predicted by the empirical equation and the on-site measured data.It is attributed to the fact that current empirical equations were established based on incohesive uniform sediments,while the transport and scour property of cohesive sediments,which are commonly seen in reality,were often neglected.Therefore,an in-depth and systematic study should be performed to establish a prediction model with a higher accuracy,so that to provide scientific and technical guides for the safety of underwater structures.
作者
李健华
周川
王俊
潘冬冬
孙忠滨
LI Jian-hua;ZHOU Chuan;WANG Jun;PAN Dong-dong;SUN Zhong-bin(China Energy Engineering Group Guangdong Electric Power Design Institute Co.Ltd.,Guangzhou 510663,China;Guangdong Kenuo Surveying Engineering Co.Ltd.,Guangzhou 510663,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)
出处
《水道港口》
2022年第5期587-595,共9页
Journal of Waterway and Harbor
基金
国家重点研发计划(2017YFC1404200)
中国能源建设集团科技项目(GSKJ2-W01-2019)。
关键词
局部冲刷
单桩基础
冲刷深度
冲深预测
现场观测
local scour
monopile foundation
scour depth
prediction of scour depth
field observation
