Bridge Pier Scour under Flood Waves
Publication: Journal of Hydraulic Engineering
Volume 136, Issue 10
Abstract
The effect of a single-peaked flood wave on pier scour is investigated both theoretically and experimentally. The conditions considered involve clear-water scour of a cohesionless material of given median sediment size and sediment nonuniformity, an approach flow characterized by a flow depth and velocity, a circular-shaped cylindrical bridge pier, and a flood hydrograph defined by its time to peak and peak discharge. A previously proposed formula for scour advance under a constant discharge was applied to the unsteady approach flow. The generalized temporal scour development along with the end scour depth are presented in terms of mainly the densimetric particle Froude number based on the maximum approach flow velocity and the median sediment size. The effect of the remaining parameters on the end scour depth is discussed and predictions are demonstrated to be essentially in agreement with model observations.
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Acknowledgments
The second writer acknowledges financial support from the Swiss National Science Foundation, Grant No. NSF-CH2100-065190.
References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 136 • Issue 10 • October 2010
Pages: 842 - 847
Copyright
© 2010 ASCE.
History
Received: Sep 6, 2007
Accepted: May 14, 2010
Published online: May 17, 2010
Published in print: Oct 2010
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