Critical velocities for local scour around twin piers in tandem  

作　　者：Quan-shuai Liu Hong-wu Tang Hao Wang Jian-feng Xiao 刘全帅;唐洪武;王浩;肖建峰

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China [2]Huaihe River Commission of the Ministry of Water Resource, Bengbu 233001, China

出　　处：《Journal of Hydrodynamics》2018年第6期1165-1173,共9页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.51279046)

摘　　要：Experiments of the local scour around twin piers are carried out under steady clear-water conditions, including 95 tests to observe the influence of the pier spacing and the flow velocity on the local scour characteristics of the twin piers. It is shown that the start of the transition region is synchronous with the sediment transport from the upstream scour hole to the downstream one. The equations for the critical velocities are derived to quantify the velocity range of each of four different scour regions. Finally, a prediction formula of the downstream pier scour depth in the radical-deviation region is established.Experiments of the local scour around twin piers are carried out under steady clear-water conditions, including 95 tests to observe the influence of the pier spacing and the flow velocity on the local scour characteristics of the twin piers. It is shown that the start of the transition region is synchronous with the sediment transport from the upstream scour hole to the downstream one. The equations for the critical velocities are derived to quantify the velocity range of each of four different scour regions. Finally, a prediction formula of the downstream pier scour depth in the radical-deviation region is established.

关 键 词：Local scour clear-water scour twin piers critical velocity experiment 

分 类 号：O3[理学—力学]