Crews have reached another milestone in the new rail passage in the heart of some of the busiest highway traffic in Canada – 100 per cent excavation in tunnel two. Since March, heavy machinery has been digging through rock and debris in the second tunnel. We get the dirt on how this was done on … Continue reading See the videos – Highway 401 and 409 Rail Tunnel project completes excavation in tunnel two
Tunneling
Final tunnel pieces removed from Crosstown’s Mt. Pleasant station area – See the images
As we continue to regularly chart the progress of the Crosstown Light Rail Transit (LRT) route across Toronto, there are a couple of fairly big recent advances to report – from tunnel pieces to an important traction power substation being energized. We’ve followed transit tunnels from the ground up. So it’s a big deal when … Continue reading Final tunnel pieces removed from Crosstown’s Mt. Pleasant station area – See the images
Twin tunnels, single bores and megabores – Local subway planners face choices on what will work best for new lines
Each new subway tunnel is as unique as its surrounding neighbourhood and geology. While six-metre, twin tunnels were once considered standard, more recent technology has made larger, single tunnels possible. This article reviews the different sizes of tunnels and the factors that go into choosing one. Let’s get out the tape measures - the really … Continue reading Twin tunnels, single bores and megabores – Local subway planners face choices on what will work best for new lines
After years underground, giant tunnel boring machines being pulled from Crosstown depths
The tunnelling work on Toronto’s Eglinton Crosstown Light Rail Transit (LRT) was completed in 2016 by four tunnel boring machines (TBMs). The city even knew their names - Dennis, Lea, Don, and Humber. Two were already taken out. Now Dennis and Lea are being pulled out as well. Dennis and Lea – or parts of … Continue reading After years underground, giant tunnel boring machines being pulled from Crosstown depths
Come underground at the Eglinton Crosstown
The Toronto Star has an excellent look at Laird Station on the Eglinton Crosstown, one of three stations that is being mined. https://www.youtube.com/watch?v=Hw0LnRi4UcI Take a look, and a read of Ben Spurr’s story to get a look at where only our construction teams have gone so far. https://www.thestar.com/news/gta/2018/04/29/underground-eglinton-crosstown-lrt-stations-take-shape-with-unique-mining-technique.html