United States Department of Transportation
i
Virginia Demonstration Project: Rapid Removal and Replacement of U.S. 15/29 Over Broad Run Near Gainesville, VA
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2009-08-01
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[PDF-2.34 MB]
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Edition:Final Report
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Abstract:As part of a national initiative sponsored by the Federal Highway Administration under the Highways for LIFE program, the Virginia Department of Transportation (VDOT) was awarded a $600,000 grant to demonstrate the use of proven, innovative technologies for accelerated bridge removal and replacement. This report documents accelerated bridge construction (ABC) techniques used to remove, widen, and replace the superstructure of the U.S. 15/29 bridge over Broad Run over three weekends. This report describes the existing bridge and the materials and methods used to widen the three-span bridge and replace the superstructure. Prefabricated superstructure segments, four per span, were used to simplify and expedite construction. Under conventional construction, the impact of this project on the traveling public was estimated at 100 days, but with the use of accelerated construction techniques, the impact was reduced to three weekend closures. Using ABC techniques added approximately $260,000 to the initial construction cost of the project. However, a more comprehensive economic analysis including user cost savings shows that the project saved road users an estimated $2.16 million or about 65 percent over conventional construction practices. Because of the success of this project, VDOT plans to use ABC techniques on future projects.
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