MACDONALD BRIDGE SUSPENDED SPANS DECK REPLACEMENT: ENGINEERING CHALLENGES AND SOLUTIONS

摘要

The Angus L. Macdonald Bridge is a major suspension bridge that crosses Halifax Harbour in Halifax, Nova Scotia, Canada. The deck of the suspended spans has reached the end of its functional life and design of a deck replacement scheme is under way. Deck segment fabrication will begin in 2014 and construction will span 2015 - 2016. On this project, a variety of significant engineering challenges have been encountered because of the complexity of replacing the deck at night with the bridge open to traffic during the day and because the design engineers are preparing the deck erection sequences scheme. This approach will streamline the construction process and lower overall project risk. Main cable dehumidification is being considered for the project.