Scour reduction by air injection at a cylindrical bridge pier: Experimental determination of optimal configuration
Document Type
Article
Publication Date
1-2019
Department
Department of Civil, Environmental, and Geospatial Engineering
Abstract
To reduce bridge scour-induced collapse, experiments were performed to determine the optimal ratio of air to water velocity values for the least amount of scour at a cylindrical bridge pier. Clear-water experiments were done in noncohesive soils with air injected by means of a horizontal, semicircular air diffuser on the upstream half of the pier at the level of the original sediment prior to scour initiation. The diffuser location, number, and size of holes were determined previously to be optimal. Of the air-to-water velocity ratios tested, it was found that the least scour occurred at a ratio of 57.1. Scour was reduced 35% over the case with no air injection.
Publication Title
Journal of Hydraulic Engineering
Recommended Citation
Tippireddy, R.,
&
Barkdoll, B. D.
(2019).
Scour reduction by air injection at a cylindrical bridge pier: Experimental determination of optimal configuration.
Journal of Hydraulic Engineering,
145(1), 06018016-1-06018016-4.
http://doi.org/10.1061/(ASCE)HY.1943-7900.0001555
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/136
Publisher's Statement
©2018 American Society of Civil Engineers. Publisher’s version of record: https://doi.org/10.1061/(ASCE)HY.1943-7900.0001555