Crews work inside a tunnel.

Smooth operator – How a ‘tunnel liner’ machine handles rough spots while digging through the earth on Highway 401 and 409 Rail Tunnel Project

Now that excavation on Tunnel One is complete on a task to burrow an important rail tunnel below and through Toronto’s busy Highway 401 and 409 area, the crews are moving a liner machine through to ensure a smooth mold inside the new subterranean passage. We take you into the depths to show you how this liner construction works, as well as introduce you to … Continue reading Smooth operator – How a ‘tunnel liner’ machine handles rough spots while digging through the earth on Highway 401 and 409 Rail Tunnel Project