Rehabilitation of New York Avenue Bridge

摘要

The upgrade of the New York Avenue Bridge in Washington, D.C., was a significant improvement project for the District Department of Transportation. The bridge is one of the major transportation corridors into the city from Maryland and is used by more than 87,000 vehicles each day. The upgrade would add redundancy and longevity to the existing two-girder superstructure, but the design team faced many obstacles in meeting the owner's expectations. "We were confronted with several challenges," says In-mar Badwan, senior bridge engineer with T. Y. Lin International, the engineer of record for the project. These included site constraints, restrictions imposed by owners of commuter and freight rail lines beneath the bridge, electrified overhead wires, demolition of existing deck and grillage of floor beams and stringers, and the need to maintain vehicular and train traffic. They also had to meet an extremely tight schedule.