Riprap Size Selection at Wing-Wall Abutments
Publication: Journal of Hydraulic Engineering
Volume 133, Issue 11
Abstract
The results of an experimental investigation of riprap stability at wing-wall abutments are reported. The aim of the experiments was the determination of the size of riprap stones necessary to resist shear failure by the flow. The results, which were obtained under a wide range of mobile-bed conditions, are compared with predictions of riprap stone size given by existing equations. Two existing methods, with the addition of suitable factors of safety, are shown to give stable stone size for riprap layers at wing-wall abutments under mobile-bed conditions. It is noted that consideration needs also to be given to filter protection, edge effects, and the effects of bed-form undermining in the design of such riprap layers.
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Acknowledgments
This project was undertaken with financial support from the National Cooperative Highway Research Program, Transportation Research Board, Grant No. UNSPECIFIEDNCHRP 24-18A.
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© 2007 ASCE.
History
Received: Apr 13, 2006
Accepted: Feb 9, 2007
Published online: Nov 1, 2007
Published in print: Nov 2007
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