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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Local scour around twin bridge piers in open channel flows
Local scour around twin bridge piers in open channel flows
Author : Wang Hao(1), Tang Hongwu(2), Liu Qianshuai(3) & Jiang Sheng(4)
ABSTRACT
Laboratory experiments have been carried out to investigate the local scour with the interaction between twin cylindrical
piers in open channel flows. The characteristics of scouring around twin-piers were summarized, which showed
differences from that around isolated pier. The experiments conducted for clear-water scour showed that the local scour
around the upstream pier at different spacing was almost the same to that around isolated pier. The local scour depth
around the downstream pier was bigger than that around the upstream pier in a range of small velocity, after which it
entrance the quasi-live-bed scour state as the sediment scoured from the upstream hole landed here .The depth of the
downstream scour hole firstly increased to a maximum, then decreased to a minimum, and finally increased as the flow
velocity increased to the incipient motion velocity of sediment. The data obtained were used to derive an equation for the
maximum depth with the separation of twin-piers to indicate the minimum spacing with no interaction between twinpiers.
File Size : 303,226 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 18/08/2015
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