January 23, 2020 1:00 pm
Guy Mailhot, Eng., M. Eng., FCSCE, FEIC, Chief Engineer, Samuel De Champlain Bridge Corridor, Infrastructure Canada (INFC); and Marwan Nader, Ph.D., P.E., Eng., Senior Vice President and Chief Engineer, T.Y. Lin International
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Featured Presentation: Use of ABC Techniques for the Samuel De Champlain Bridge (35 Minutes)
Description: The new 2.1-mile-long signature cable-stayed Samuel De Champlain Bridge replaced the existing Champlain Bridge over the Saint Lawrence River in Quebec, Canada. Fully opened to traffic in July 2019 with a design life of 125 years, the new 1,736-ft-long cable-stayed section includes a single 520-ft-tall reinforced concrete pylon. Many factors, such as the existing bridge condition, limited construction periods, and severe weather constraints required the use of an ABC approach. To meet the challenging schedule, design decisions were made to maximize the use of segmental construction and innovative erection sequencing. Precasting allowed foundation preparation and footing casting to be carried out in parallel, and precast footings reduced the amount of in-water works. Other concrete elements, such as pier legs and portions of the tower, were precast in modules and assembled using post-tensioning. Precast deck panels expedited deck construction. Steel elements, notably the pier caps, employed prefabrication at multiple shops to shortened the fabrication schedule. This presentation includes design and construction details and lessons learned.
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