T.Y. Lin International (TYLI) served as the lead design engineer and project design manager for the Port Mann Bridge over the Fraser River in Vancouver, British Columbia. The Port Mann Bridge/Highway 1 design-build project includes the new, 10-lane signature bridge, the south approach in Surrey, and the north approach in Coquitlam as part of British Columbia’s Gateway Program to address Greater Vancouver’s current and future transportation needs.
At 2 kilometers long and featuring a 470-meter-long main span and 52-meter-wide deck, the Port Mann Bridge is currently the second longest cable-stayed bridge in North America and one of the widest bridges in the world.
Due to the bridge’s location in a high seismic region, TYLI oversaw intensive seismic engineering analysis and design for the project. The TYLI team was also responsible for verifying the design-builder construction quality program and certifying the constructed works prior to operation.
- The superstructure consists of two five-lane decks, separated by a 10-meter median where the central pylons are located. Each roadway is supported by two planes of stay cables.
- TYLI’s design features two, dramatic, single mast concrete towers, which rise approximately 160 meters over the river and house anchorages for the four planes of cables.
- The stay cable system incorporates 288 cables, which, if laid end to end, would extend about 45 kilometers.
- The structures for the 820-meter-long northern approach and the 360-meter-long southern approach each consist of three precast concrete segmental box girders. Cost-effective span-by-span construction was used for segments over land and longer span-free cantilever construction for segments over water.
- TYLI performed a comprehensive non-linear soil-structure interaction analysis to verify the efficiency and sufficiency of the firm’s state-of-the-art design for high seismic demands.
- The Port Mann Bridge is founded in deep alluvium soils on 1.82-meter-diameter steel piles offshore and 2.4-meter-diameter concrete shafts onshore. Foundations were all governed by seismic loads.
- Delivery of the bridge design was staged for foundations, piers, and superstructure work to support construction operations. The initial design package for the main foundations was produced on schedule, allowing main foundation pile driving to meet the in-water work restrictions for fish passage.
- A barrier-separated, 3-meter-wide bicycle-pedestrian path has been included on the east side of the structure, creating a new connection across the Fraser River for bicyclists and pedestrians.
- National Honor Award, 2016
American Council of Engineering Companies (ACEC)
- Platinum Award, 2016
American Council of Engineering Companies of Washington (ACEC-WA)