United States Department of Transportation
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Procedures, cost and effectiveness for deteriorated bridge substructure repair.
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2013-03-01
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[PDF-18.07 MB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;
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Abstract:Deterioration of bridge substructures has been a serious concern throughout Wisconsin. Concrete, steel and
timber components all require distinct repair methods which not only address the true cause of the deterioration,
but also protect the component from future damage. In order to determine common repair practices and their
success rates, the research team surveyed maintenance engineers throughout the United States to determine
successful and reliable substructure repair techniques. The survey indicated that concrete surface repair is the
most common repair technique, and was also viewed as the most unreliable. The survey results indicated that
the most reliable repair technique for scour was the correct sizing and use of riprap. Eight bridges were visited
throughout the Southeast and Southwest regions of WisDOT. These bridges were documented, both for their
typical deterioration and unique repair methods. Various methods and procedures of repairing concrete, timber
and steel substructures, and countering scour were summarized and discussed. Decision matrices were created
to compare different repair methods based on their unit costs and estimated service life. A repair manual
including detailed and drawing and procedures of 72 different repair methods was created for use by WisDOT
personnel.
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