Improved bridge pier collar for reducing scour  

作　　者：Christopher Valela Colin David Rennie Ioan Nistor 

机构地区：[1]Department of Civil Engineering,University of Ottawa,161 Louis Pasteur Drive,Ottawa,K1N 6N5,Canada

出　　处：《International Journal of Sediment Research》2022年第1期37-46,共10页国际泥沙研究（英文版）

基　　金：supported by the Natural Sciences and Engineering Research Council of Canada(NSERC)through Discovery Grants and the Alexander Graham Bell Canada Graduate Doctoral(CGS D)Scholarship.

摘　　要：This study performed a bridge pier collar comparison for the purpose of reducing scour,while introducing a new collar design.The new collar,referred to as Collar Prototype Number 3,was designed based on an equilibrium scour hole and provides a method of controlling the horseshoe vortex.Numerical modelling was utilized to show the flow field and bed shear stress as a result of using Collar Prototype Number 3.A prototype model of Collar Prototype Number 3 and a flat plate collar were constructed for the purpose of comparing both experimentally under different flow conditions.Collar Prototype Number 3 proved to be an effective device as it reduced scour in terms of the maximum depth downstream of the pier and overall volume,in some instances,by up to 69.7%and 75.7%,respectively.Furthermore,Collar Prototype Number 3 outperformed the flat plate collar,especially because,unlike the flat plate collar,Collar Prototype Number 3 did not experience undermining.

关 键 词：Bridge pier SCOUR Horseshoe vortex Pier collar Scour countermeasure 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] U442.32[交通运输工程—道路与铁道工程]