[drum118]

There's plenty of room on both sides for a crane, not that they would need one. And the DVP is shut down several times a year for cleaning and races. I can't imagine it would be a big problem to shut it down for a bridge installation that was built off site. It will likely get shut down for this anyways. Remember that the Cherry Street Bridges were fully built in another city. It doesn't have to be built anywhere close to here.

Having said that, the south cherry street bridge and lake shore blvd would block the barge's way up the Don.

I don't know what the land looks like on the east side of the DVP, but you have 2 issues on the west side. I shot all the bridges as they arrived from NS as well being place and that couldn't happen even if the South Cherry and the Lake Shore where not there due to the curve of the river

You have hydro wires in the way on the west side, but not enough room to build the bridge as one section. Look where the west pier is and the distance between it and the RH line. The cranes need to have long booms to lift the bridge and walking it into position with the wires in the way. You need 2 cranes on the west side and another 2 on the east side that will deal with the hand off from the west to the east. I cannot speak to the east side since I have no info on that area.

As you noted, closing the DVP to move the bridge into place can take place on a weekend when other work is taking place on it, which is no big deal

If you watched how the CityPlace bridge was place over the GO tracks took place, they used 600T mobile cranes to do it and that was a light bridge. The cranes could move over the protected tracks to walk the bridge into position and have videos and photos of that move. You can place a crane on a barge in the Don for the move as well on the DVP..

The easy way to do it is as noted and that is sliding it into position which is more work in the long run.

 

[officedweller]

...
And the lower Don Valley bridge. I believe the steel structure is the temporary bridge trestle mentioned in this Corktown presentation document from November.
View attachment 629438

The easy way to do it is as noted and that is sliding it into position which is more work in the long run.

... and they are only sliding half of it (the part over the Don Valley Parkway), because there isn't enough space
to the west (of the west abuttment) to build the entire bridge length and slide the whole structure
over both the parkway and the river at the same time.
So the temporary supports will provide a platform to build the portion to be slid,
and the rest will be built in place on the platform.

 

[smallspy]

I'm assuming the trains have already been "purchased", so there shouldn't be any tariffs even if they're built in the US.

That's not how tariffs work.

Dan

 

[drum118]

... and they are only sliding half of it (the part over the Don Valley Parkway), because there isn't enough space
to the west (of the west abuttment) to build the entire bridge length and slide the whole structure
over both the parkway and the river at the same time.
So the temporary supports will provide a platform to build the portion to be slid,
and the rest will be built in place on the platform.

If you noticed my responded to Kotsy replied, I said the same thing as you noted as that is the only way I could see it being since I had no idea what the land look like on the east side. You would have a hard time doing a haft a bridge west of the abutment which is sit back further than the existing bridges.

I was bore last night and looked at some youtube videos on a few things I like and came upon of Amsterdam Centraal Station bridges replacement. Saw the station in 2012 and 2022 and by the looks of things I could still see work going on in 2032 The station construction has been been on going since about 2009 which I saw on my two trips to the station. They are replacing all the bridges now over the river and roadway using a barge that sank to get the new bridge sections into position. It will be interesting how they get the other 4 bridges in place with one bridge being done yearly. If the new Lake Shore bridges over the Don was a little higher, you could do some thing like Amsterdam without the arch as a longer section.

Edit
This show up in my in box and similar to the QEW Bridge placement over the Credit River for the New Bridge. <https://railuk.com/infrastructure/n...0-tonne-viaduct-deck-slide-in-just-four-days/>

 

[urbancog]

Hitachi Rail Metro vehicles have been built in Italy so far. https://en.wikipedia.org/wiki/Hitachi_Rail_Italy_Driverless_Metro

Not sure whether there was any Canadian content provision in the RfP that would require assembly here but it seems likely that most of the manufacturing will still be done there.

 

[APTA-2048]

Hitachi Rail Metro vehicles have been built in Italy so far. https://en.wikipedia.org/wiki/Hitachi_Rail_Italy_Driverless_Metro

Not sure whether there was any Canadian content provision in the RfP that would require assembly here but it seems likely that most of the manufacturing will still be done there.

Canadian content was lowered, so they can build them somewhere else. It looked like it would have made sense to build them at the new facility in Maryland.

 

[tstormers]

Photos of the tunnel exit at the DVP from this morning.

Bridge Pier location opposite side.

 

[kai]

A recent article from the Metrolinx wesbite posted Jan 28

2025: The year of digging for the Ontario Line

Major excavation will continue shaping Toronto’s newest subway route downtown.

www.metrolinx.com

photo from the article

 

[TOtramz]

"In 2025, our roadheaders will continue to carve the pathways that will connect the main Ontario Line subway tunnels to future underground caverns that will eventually house underground stations."
This line comes from the article above.

Does this mean that the platforms won't be next to the tunnels? Very confusing to me!

 

[chrisw]

"In 2025, our roadheaders will continue to carve the pathways that will connect the main Ontario Line subway tunnels to future underground caverns that will eventually house underground stations."
This line comes from the article above.

Does this mean that the platforms won't be next to the tunnels? Very confusing to me!

Here's a good visualization of the Queen/Spadina Cavern. The tunnels would connect to both ends of the cavern.

 

[Smiffy]

"In 2025, our roadheaders will continue to carve the pathways that will connect the main Ontario Line subway tunnels to future underground caverns that will eventually house underground stations."
This line comes from the article above.

Does this mean that the platforms won't be next to the tunnels? Very confusing to me!

No, I just think It's just bad editing in this case.

 

[TOtramz]

Here's a good visualization of the Queen/Spadina Cavern. The tunnels would connect to both ends of the cavern.

If the TBMs will pass through the cavern, what is going to propel them forward given that they use tunnels walls for leverage?

 

[kotsy]

No, I just think It's just bad editing in this case.

You're correct. Corktown, among many others, will be excavated where the station box will sit.

 

[stevedean]

I've walked by all the downtown station sites, and I was shocked at the scale of the east end stations like Corktown and Moss Park - they are massive construction sites! (especially compared to the west end stations)

 

[chrisw]

You're correct. Corktown, among many others, will be excavated where the station box will sit.
View attachment 630094

The article mentioned 3 stations by name.

At the King-Bathurst, Queen-Spadina and Osgoode station sites, roadheaders are being deployed this year to help build underground spaces. Roadheaders, machines traditionally used in mining, use the sequential excavation method to cut through hard rock and create small spaces. In 2025, our roadheaders will continue to carve the pathways that will connect the main Ontario Line subway tunnels to future underground caverns that will eventually house underground stations.