Arup said it has marked the official opening of the Billy Bishop Toronto City Airport Pedestrian Tunnel in Toronto on Thursday, July 30, 2015.
The project was procured by owner-operator PortsToronto as a public-private partnership (P3) structured under a design-build-finance-maintain model with Forum Infrastructure Partners.
In this capacity, Forum acted as lead developer, with PCL Constructors Canada Inc. as design-builder, Arup as lead designer, Technicore Underground Inc. as tunnel contractor, and Johnson Controls as facility manager. In collaboration with design-build lead PCL, Arup was the lead tunnel designer for the project, including the temporary support and the permanent lining design, and also provided technical support and general review services during construction.
Built under the Western Gap of Toronto Harbor on Lake Ontario, the USD82.5M P3 project connects the Billy Bishop Toronto City Airport to downtown Toronto. Arup designed the tunnel as well as the mainland shaft situated six meters from the water´s edge, and the island shaft, the mainland terminal building and the connection to the existing airport terminal on the island side. The airport remained open and uninterrupted during all stages of construction.
Arup performed all numerical analyses for temporary support of drift bores and main tunnel excavation activities, in addition to the final lining of the main tunnel.
The 10-meter cut diameter of this tunnel makes it one of the largest tunnels to be constructed in shale bedrock in the greater Toronto area. Arup monitored movements in the shafts, drift tunnels, and main tunnel excavation, which enabled design requirements to change to better suit the project.