Eglinton LRT Advance Tunnels

The project involved utility and road realignment in the ROW and constructing a 6.5-km-long, twin-bored tunnel running beneath Eglinton Avenue from Black Creek Station to Yonge Street Station in Toronto.

The tunnels were constructed using earth pressure balance tunnel boring machines (TBMs) and pre-cast tunnel lining segments. The internal diameter of the tunnels is 5.75 meters. 

Secant pile headwalls at three stations, jet grouting headwalls at four stations, nine cross passages between tunnels, and an extensive instrumentation system to monitor for settlement were part of the work. A jet grout system to densify the ground prior to mining and to avoid existing utilities from settlement was implemented during construction.

Kenaidan built the launch shaft for the TBM under a separate contract, which included the excavation of a 60-metre-long x 20-metre-wide x 17-metre-deep access shaft for the TBMs.