详情

原文传递 Bridge Replacements on MD 28 and MD 450, Frederick County and Anne Arundel County, Maryland.

题名：	Bridge Replacements on MD 28 and MD 450, Frederick County and Anne Arundel County, Maryland.
作者：	Hausman, J.; Hoffman, G.; Littleton, P.; Mallela, J.; Ullman, J.
关键词：	Bridges; Construction Materials; Contracts; Costs; Detours; Grants; Maryland; Prefabricated Bridge Structures; Replacement; Road Closures; Rural Areas; Technology Innovation; Travel Delay
摘要：	As part of a national initiative sponsored by the Federal Highway Administration under the Highways for LIFE program, the Maryland State Highway Administration (MDSHA) was awarded a grant totaling 20 percent of the total project construction cost (or $717,157), making this a 100 percent federally funded project. The grant was awarded because the project was intended to demonstrate the use of proven, innovative technologies to deliver two rural bridge replacement projects in an accelerated schedule so as not to impact school bus routes. This report documents the MD 28 over Washington Run and MD 450 over Bacon Ridge Branch bridge projects, both single span bridges carrying two-lane, two-way roadways. This report summarizes the practices employed for these projects, including the use of prefabricated bridge elements and structures (PBES), incentive contracting, and construction within full roadway closures and detours. The use of these technologies decreased estimated construction time from 15 months for similar typical bridge replacement projects to 3 months (only 2 months of roadway closure). While the full roadway closures and subsequent detours significantly increased user delays and fuel consumption on a daily basis, the drastically reduced construction time and great savings in MOT and construction phasing resulted in a project savings of approximately $1.49 million (or approximately 32 percent of the total project costs) of the MD 28 project alone. Because of the success of this project, MDSHA is applying lessons learned and have already taken steps on other projects to further utilize PBES construction practices to save time and money.
报告类型：	科技报告