09-11-2016, 01:12 PM
(09-11-2016, 11:05 AM)BrianT Wrote:(09-11-2016, 10:12 AM)bpoland Wrote: "A crossing of the LRT tracks will be necessary at the King Street S. and John Street
intersection. This crossing will use non-destructive construction methods and will have
no impact on the recently constructed tracks."
Yeah will definitely be interesting to see how they do this. Might be easier said than done
It's too bad they couldn't have coordinated with LRT construction to lay the pipes under the King/John intersection even if they weren't ready to do the rest of it. I also wonder how much disruption this will cause to the Iron Horse Trail, will they have to dig it all up from Glasgow to John?
They have machinery that can drill the pipes under the King/John intersection without disturbing the street or the LRT tracks.
This was done just a few years ago to run a sewer pipe in Uptown, I believe under Dupont St. from near the Perimeter Institute to Peppler St. It was a small version of the tunnel boring machines used for subway tunnels. In that case the street itself still had to be dug up but the disruption was less than if the general excavation had had to be taken down to the level of the sewer pipe. There are also techniques that can be used like placing a pipe in a hole beside the road, then ramming it through underneath the road. I’ve even heard of this being done with an entire tunnel — essentially construct the tunnel down from its final location then “just” shove it into place.