Reduction of Local Scour in the Vicinity of Bridge Pier Groups Using Collars and Riprap
Publication: Journal of Hydraulic Engineering
Volume 132, Issue 2
Abstract
The present study examines the use of independent and continuous pier collars in combination with riprap for reducing local scour around bridge pier groups. The efficiency of collars was studied through experiments. The data from the experiments were compared with data from earlier studies on single piers with collars and bridge pier groups without collars. The data showed that in the case of two piers in line, combination of continuous collars and riprap results in the most significant scour reduction of about 50 and 60% for the front and rear piers, respectively. In other cases for two piers in line, independent collars showed better efficiency than a continuous collar around both piers. It was also shown that efficiency of collars is more on a rectangular pier aligned with the flow than two piers in line. Experiments however, indicated that collars are not so effective in reduction of scouring around two transverse piers.
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Acknowledgments
The comments and suggestions of the reviewers, which improved the original manuscript are gratefully acknowledged. This work was done under a grant from the Iranian Scientific Research Council and experimental facilities were provided by Water Research Center which is appreciated.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 132 • Issue 2 • February 2006
Pages: 154 - 162
Copyright
© 2006 ASCE.
History
Received: Dec 23, 2003
Accepted: Feb 11, 2005
Published online: Feb 1, 2006
Published in print: Feb 2006
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