Experimental Study on the Scour around a Monopile in Breaking Waves
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 138, Issue 6
Abstract
The scour process around monopiles caused by breaking waves is studied experimentally using regular waves. The use of regular waves is conservative, which made it possible to avoid scour phenomena caused by nonbreaking waves such as scour generation and backfilling. The waves were breaking on a flat sand section after shoaling on a mildly sloping ramp. Various monopiles were exposed to plunging breakers that were breaking at various distances from the pile. It was found that the scour was caused by turbulence generated by the breaking and was diverted toward the bottom by the pile. The maximum scour depth found was approximately 0.60. This was smaller than the scour observed around piles exposed to current; however, in some cases it was an order of magnitude larger than the scour caused by nonbreaking waves. This is apparently especially true for larger piles.
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Acknowledgments
This research was carried out as part of the Statkraft Ocean Energy Research Program, sponsored by Statkraft (www.statkraft.no). The study was partially supported by the Danish Council for Strategic Research (DSF)/Energy and Environment under the program Seabed Wind Farm Interaction (http://sbwi.dhigroup.com, Sagsnr. 2104-07-0010) and DHI (www.dhigroup.com).
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Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 138 • Issue 6 • November 2012
Pages: 501 - 506
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 18, 2011
Accepted: Feb 28, 2012
Published online: Apr 12, 2012
Published in print: Nov 1, 2012
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