Toronto Ontario Line 3 | ?m | ?s | Metrolinx

[81-717]

Nothing pretty, but here are some progress shots.

Would also love to see some progress shots at Progress ave of the line 2 extension

 

[hawc]

Would also love to see some progress shots at Progress ave of the line 2 extension

@TwinHuey handles Scarborough requests.

 

[TwinHuey]

@TwinHuey is currently in Merida . Will get some drone shots of Line 2 extension in a couple of weeks.

 

[kev1n1m]

Appreciate you both for your unique perspective and steady updates @hawc @TwinHuey

 

[rdaner]

These are the supports for the bridge over the Don. Taken 18 December.

 

[generalcanada]

These are the supports for the bridge over the Don. Taken 18 December.

View attachment 620581
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yea those on the east side have been there for awhile. Was complete like a year ago.

 

[rdaner]

yea those on the east side have been there for awhile. Was complete like a year ago.

Thanks! Do you know when the west one went in?

 

[generalcanada]

Thanks! Do you know when the west one went in?

least 6 months if not earlier

 

[kotsy]

yea those on the east side have been there for awhile. Was complete like a year ago.

This is half true.

The bottom portion has been there about a year. The top half was done within the last few weeks.

 

[hawc]

The bottom portion has been there about a year. The top half was done within the last few weeks.

Yup top half pretty new.

 

[pesto]

The as yet unnamed TBM's for the Ontario Line in Germany:

Source:

https://twitter.com/x/status/1870137334055772343

 

[hawc]

Will there be two? I'm thinking 7 meters wide isn't wide enough for two trains to fit in side by side, but maybe I'm wrong.

 

[kotsy]

Will there be two? I'm thinking 7 meters wide isn't wide enough for two trains to fit in side by side, but maybe I'm wrong.

Yes, two tunnels. Thanks to Exhibition portal renderings posted yesterday by @Frankietls

 

[Steve X]

Will there be two? I'm thinking 7 meters wide isn't wide enough for two trains to fit in side by side, but maybe I'm wrong.

A 7m TBM will leave the inner tunnel diameter around 6.2m as the tunnel liners take up 40cm each side. A train is over 3m wide. To have 2 trains side by side will definitely not fit in a 6.2m diameter tunnel if you thought of the height on the edge. Plus having a 10 cm gap between two trains will definitely result in disaster. They need some space for tilting in curves and wear and tear tolerance.

 

[Milaisacat]

The SkyTrain Evergreen Line Extension (now part of the Millennium Line) used a 9.84 m-diameter tunnel boring machine for its bidirectional tunnel. Here's what that looks like (before the full-height dividing wall was installed)

It's hard to get a sense of scale for these things, so here's what the 9.84 m-diameter TBM looked like:

Source: https://www.tranbc.ca/2014/03/26/the-evergreen-line-tunnel-alice-will-make-it-a-boring-job/