潮流对桥墩局部冲刷影响研究综述

Review on the influence of tidal current on local scour of bridge piers

潮流环境桥墩冲刷问题已成为目前研究的热点。为深入分析潮流对桥墩局部冲刷影响,文章通过系统梳理河口或近海潮流环境下桥墩局部冲刷文献成果,总结了潮流引起的桥墩局部冲刷特性,明晰潮流引起的桥墩局部冲刷机理与过程,并阐述了潮流桥墩局部冲刷深度、冲刷过程变化及主要影响因素。研究分析认为:潮型及流速的概化差异是造成目前潮流桥墩局部冲刷成果不连续的重要原因,且试验中采用未平衡冲刷试验成果将进一步增加潮流冲刷认识的分歧。同时,文章分析潮流冲刷影响因素发现其与恒定流冲刷特性存在较大差异,且在应用恒定流冲刷成果于潮流冲刷时应谨慎。最后,文章指出潮流桥墩局部冲刷进一步研究方向,为后续相关研究提供了方向与指导。

The erosion of bridge piers in tidal environment had become a research hotspot.For further analysis of bridge piers local scour in tidal environment,the paper,through systematical combing estuary and coastal tidal environment literature of the bridge pier local scour,summarized the trend of bridge pier local scour features,known clearly the trend caused by bridge pier local scour mechanism and process,and expounded the trend of the bridge pier local scour depth and scour process change and main influence factors.It is concluded that the generalization difference of tidal pattern and flow velocity is the important reason for the discontinuity of local scour results of tidal environment for bridge,and the adoption of unbalanced scour results in the test will furtherly increase the divergence in the recognition of bridge scour in tidal environment.At the same time,the paper analyzes the influence factors of tidal current scouring and finds that it is quite different from the characteristics of constant current scour,and should be cautious when applying the results of constant current scour to tidal current scour.Finally,the paper points out the direction of further research on local scour of bridge scour in tidal environment,which provides direction and guidance for subsequent related researches.