PCI eLearning Course T215: Design and Detailing of Full-Depth Precast Concrete Deck Panels-Deck Widening and Replacement of Woodrow Wilson Memorial Bridge

Deck Widening and Replacement of Woodrow Wilson Memorial Bridge

Pdf Summary

The Woodrow Wilson Memorial Bridge on I-95, located south of Washington, D.C., was in need of deck widening and replacement. The bridge was constructed between 1959 and 1962 and was showing signs of deterioration by 1977. The Maryland State Highway Administration contracted with consulting engineers to evaluate different methods for replacing the deck while maintaining traffic. The final design involved the use of lightweight precast concrete deck panels, supported by the existing steel girder and stringer system. The panels were transversely post-tensioned and longitudinally post-tensioned in place. The project also used methyl methacrylate polymer concrete and mortar for certain details within the deck system. Innovative construction techniques were employed, including the use of temporary work platforms and debris shields, as well as temporary open grid deck panels. The construction operations involved the removal of the original deck, setting and adjusting of the precast panels, and post-tensioning of the panels. The project was completed ahead of schedule and received awards for its innovative design and construction techniques.

Keywords

Woodrow Wilson Memorial Bridge

I-95

deck widening

deck replacement

deterioration

consulting engineers

precast concrete deck panels

steel girder

stringer system

post-tensioning