Case Study: Retrofitting Large Bridge Piers on the Nakdong River, South Korea
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 11
Abstract
The Gupo Bridge crosses the Nakdong River near the city of Busan, South Korea. During Typhoon Maemi in 2003, the old Gupo Bridge collapsed due to excessive pier scour. More recently, the highway construction on the left-bank floodplain required right-bank channel widening to restore the channel flood-carrying capacity. This deep floodplain excavation is expected to cause significant local scour around the wide and thick spread footings of Piers 11 and 12 of the Subway Bridge and Piers 15 and 16 of the Gupo Bridge. Three design options are examined for retrofitting floodplain bridge piers with massive spread footings. A solution with sheet piles and riprap was recommended in 2006 as the most appropriate design, but Plan III with a conical riprap structure around the footings was ultimately constructed in 2007 for economic reasons. Laboratory experiments also highlight the need to place gravel and synthetic filters under the designed riprap.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 11 • November 2008
Pages: 1639 - 1650
Copyright
© 2008 ASCE.
History
Received: Apr 10, 2007
Accepted: Apr 21, 2008
Published online: Nov 1, 2008
Published in print: Nov 2008
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