[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
View attachment 620582

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/