Accelerated Bridge Construction of the New Samuel De Champlain Bridge
Publication: Journal of Bridge Engineering
Volume 25, Issue 2
Abstract
Located over the St. Lawrence Seaway, the new Samuel De Champlain Bridge was designed and constructed in 48 months despite the severe winter of Montreal. Many factors, including a deteriorating existing bridge, limited construction periods, and severe weather constraints on large infrastructure projects such as this, often require the use of an accelerated bridge construction (ABC) approach. All the aforementioned factors were primary challenges for the new Samuel De Champlain Bridge project. To meet the fast-tracked schedule, design decisions for the signature cable-stayed bridge included maximizing the use of segmental construction, choosing steel over concrete for the pier caps, and adjusting the cable-stayed bridge closure joint location. Concrete elements, including pier legs and portions of the tower, were precast in modules and assembled using post-tensioning. Precasting allows work to continue through cold winter periods—when pouring in situ concrete would otherwise be very difficult and time consuming. Precasting also allows casting and erection to be carried out in parallel, rather than in series—as in conventional construction. The superstructure utilized precast deck panels to expedite deck construction. Steel elements were prefabricated at multiple shops to minimize field welding. Along with innovative erection sequencing, on-site construction time was minimized and the overall bridge construction was accelerated.
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Acknowledgments
The author acknowledges the support of the owner, Infrastructure Canada, the constructor partnership formed by SNC-Lavalin Major Project, Inc., Dragados Canada, Inc., and Flatiron Constructors Canada Limited, and the design joint venture of T. Y. Lin International Canada, Inc., International Bridge Technologies Canada, Inc., and SNC-Lavalin, Inc.
References
ASTM. 2018. Standard specification for low-relaxation, seven-wire steel strand for prestressed concrete. ASTM A416/A416M. West Conshohocken, PA: ASTM.
BSI (British Standards Institution). 2010. Eurocode 3: Design of steel structures: Part 1-5 plated structural elements. BS EN 1993-1-5. London: BSI.
CSA (Canadian Standards Association). 2012. Canadian highway bridge design code. CAN/CSA S6. Mississauga, Canada: CSA.
PTI (Post-Tensioning Institute). 2012. Recommendations for stay-cable design, testing and installation. PTI DC45.1-12. Phoenix: PTI.
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©2019 American Society of Civil Engineers.
History
Received: Feb 28, 2018
Accepted: Aug 18, 2019
Published online: Dec 10, 2019
Published in print: Feb 1, 2020
Discussion open until: May 10, 2020
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