Overnight Delivery-The Story of NJDOT's US Rt.1 Freeway Bridge Reconstruction Project

摘要

The aging highway bridge infrastructure in the United States is being subjected to increasing traffic volumes, structural deficiency and functional obsolete. They must be continuously renewed while accommodating traffic flow. This presentation demonstrates the application of prefab technology where traffic control issues demanded rapid construction and decision making risk of total facility showdown. It shows an example supporting the FHWA's Accelerated Bridge Construction Decision Making Framework. Using the lessons learned from previous experience with the emergency repair/replacement, the reconstruction involved completely replacing three superstructures of two bridges with prefabricated components installed in 59-hour time window over a weekend structurally deficient bridges carrying a freeway section of Route US Rt.l through the capital city of Trenton. The project involved completely replacing the superstructures of the two bridges with new ones designed for a 75 year life made off site and installed over three weekend shutdowns of 59 hours each. The design and construction learned lessons from the past experience of two emergency repair/replacement projects. A project of this magnitude would typically take the Department approximately 2 years to design and construct as a traditional deck replacement and bridge rehabilitation project. The project approach saved more than 22 months and an estimated design and construction savings, including delay-related user costs in excess of $2M. The results? An extremely happy motoring public, bridge owner and contractor.