Recommendations for design, construction, and maintenance of bridge approach slabs : synthesis report.
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2009-04-01
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Edition:Technical report; Sept. 2007-Aug. 2008.
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Abstract:Bridge approaches provide smooth and safe transition of vehicles from highway pavements to bridge
structures. However, settlement of the bridge approach slab relative to bridge decks usually creates a
bump in the roadway. The bump causes inconvenience to passengers and increases the cost of
maintenance and repairing of the distressed approach slabs. Typically, the Texas Department of
Transportation (TxDOT) spends millions of dollars annually to mitigate the bump problem across the
state. The present research aims to better understand the mechanisms that cause the bump problem, to
review currently used methods to mitigate this problem around the world, and to develop the methods
that are appropriate for researching them in real field conditions. As a part of this research, a synthesis
was prepared by conducting a comprehensive literature review of the past research on the subject and
also by conducting a survey with all 25 districts to understand the local conditions that contribute to the
bump problem in the bridges. The literature review also identified several technologies that were used
to mitigate the problem. All these details along with district wide surveys are covered in this synthesis
report.
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