Effectiveness of recurve walls in reducing wave overtopping on seawalls and breakwaters
Effectiveness of recurve walls in reducing wave overtopping on seawalls and breakwaters.
Pearson, J.and Bruce, T. and Allsop, W. and Kortenhaus, A. and van der Meer, J.
In: ICCE 2004 (29th International Conference on Coastal Engineering), 19-24 September 2004, Lisbon, Portugal. (2004)
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|Abstract:||Designers of vertical seawalls and breakwaters have often included some form of seaward overhang (recurve / parapet / wave return wall / bullnose) as part of the structure with the design motivation of reducing wave overtopping by deflecting back seaward uprushing water. Despite a lengthy track record in the field and relevance to current design issues, very little generic guidance is available for their incorporation into seawall / breakwater design. This paper reports a study whose aim is the formulation of generic guidance for recurve structure design. Particular attention is given to high freeboard and / or wave breaking conditions under which the recurve / parapet gives very large reductions (recurve k-factor < 0.05). The paper presents tentative guidance in the form of a decision chart. Finally, overtopping and loading results from a case study into a wall of particularly complex geometry are presented and compared with earlier studies. Forces on the vertical wall are found to be highly impulsive in nature and approximately double the magnitude of those expected on a simple wall, with additional forces of a similar magnitude measured on the underside of the parapet.|
|Item Type:||Conference or Workshop Item (Paper)|
|Subjects:||Maritime > General|
Coasts > Overtopping
Coasts > General
|Deposited On:||02 Feb 2015 11:57|
|Last Modified:||19 Jul 2017 07:39|
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