Toronto Bloor–Danforth Line 2 Scarborough Subway Extension | ?m | ?s | Metrolinx

[KhalilHeron]

So 2 trains side by side are supposed to fit in that tunnel?

might be a picture of a different tunnel. doesnt look 10m wide as this one should be and im not sure where on the line they would have a tight curve like that done already. the tunnel does curve a bit around the 401 so it could be that

 

[cplchanb]

If anything, with the tracks and electrical gone they can use it for storage.

I wonder if they are keeping the SRT loop until after the construction is done so as not to impact one of the few remaining entrances to the station. If they close the entrance at the SRT loop while construction is underway, it may cause a fire code violation via the number of exits.

Think about it. Right now, there are only two actual exits from the station. One is via the SRT loop area and the other is by the collector booths at Transway. Technically (and possibly legally) speaking, the bus bays are not an exit

they need to knock down the main ramp to the station in order to complete the kennedy platform. right now the northern part of the station cant be built because its in the way.

 

[crs1026]

That absolutely is a different tunnel. The Line 2 tunnel is nowhere near that complete at this point in time. Compare pictures from past tbm drives, including TYSSE and Crosstown 1.0 and 2.0.... at this point you would expect to see the conveyor to remove spoils, temporary lighting and unfinished conduit, temporary trackage for the construction material handling.

Once the tbms are extracted, a lot of temporary stuff is removed and the final add-ins begin. We are nowhere near that yet.

- Paul

 

[officedweller]

That absolutely is a different tunnel. The Line 2 tunnel is nowhere near that complete at this point in time. Compare pictures from past tbm drives, including TYSSE and Crosstown 1.0 and 2.0.... at this point you would expect to see the conveyor to remove spoils, temporary lighting and unfinished conduit, temporary trackage for the construction material handling.

Once the tbms are extracted, a lot of temporary stuff is removed and the final add-ins begin. We are nowhere near that yet.

- Paul

The conveyor to remove spoils is in the upper right side.
It looks so small because the tunnel is so big.
There's still a lot of work to go. Those pipes are to supply the TBM.
They'll have to pour a level floor about a third the way up from the bottom.

Here's the Vancouver Broadway SkyTrain tunnel (6m diameter) for comparison:

This was the 10m diameter SkyTrain Evergreen Line tunnel:

Evergreen line with a floor:

and with the dividing wall:

 

[ARG1]

The conveyor to remove spoils is in the upper right side.
It looks so small because the tunnel is so big.
There's still a lot of work to go. Those pipes are to supply the TBM.
They'll have to pour a level floor about a third the way up from the bottom.

Here's the Vancouver Broadway SkyTrain tunnel (6m diameter) for comparison:

If its any sort of visual indicator/guide, assuming they're using a standard guardrail height of around 1.0m above the walkway, given that TRs are around 3.3m, you can imagine 3 or 3.5 of those guardrails placed horizontally being roughly the width of a TR. All of a sudden this tunnel begins to look very spacious.

 

[nfitz]

The conveyor to remove spoils is in the upper right side.
It looks so small because the tunnel is so big.
There's still a lot of work to go. Those pipes are to supply the TBM.
They'll have to pour a level floor about a third the way up from the bottom.

Looking at the Evergreen tunnel photos. Gosh, that's a lot of volume taken up by the floor. Surely it must be hollow - otherwise that's a couple of quarries worth of concrete!

 

[officedweller]

Looking at the Evergreen tunnel photos. Gosh, that's a lot of volume taken up by the floor. Surely it must be hollow - otherwise that's a couple of quarries worth of concrete!

Okay - I thought it was hollow but AI tells me different!

The question about whether the "evergreen tunnel floor" is hollow appears to refer to the Evergreen Line SkyTrain tunnel in British Columbia, which experienced several sinkholes during construction due to challenging soil conditions.
The floor of the completed tunnel is a solid, built-up structure, not a hollow space in the ground.
Construction Details
Tunnel Walls: The tunnel walls are constructed from thousands of pre-cast concrete segments that form a continuous, sealed ring.
The Invert (Floor): After the tunnel boring machine ("Alice") completed the initial bore and the wall segments were in place, the finishing work began inside the tunnel. This included building the base and a central wall.
Seismic Design: The design of the floor, or "invert," specifically included the use of granular fill to accommodate seismic ground motion and provide drainage of any groundwater leakage through the lining to the lowest point at the east portal. This fill material and the concrete base create a solid foundation for the track work.

 

[crs1026]

Looking at the Evergreen tunnel photos. Gosh, that's a lot of volume taken up by the floor. Surely it must be hollow - otherwise that's a couple of quarries worth of concrete!

Indeed. I hope it's hollow - The carbon footprint from that much concrete would be horrendous.

Which makes one imagine the potential for a crawlspace - Retail and office space ? Linear indoor park ? Cycling trail ? Big honking model railway club ? Reservoir ? Raccoon paradise ?

- Paul

PS - Reading further - I gather it can just be filled in with granular and poured over top. Still, it's a lot of excavating and spoils hauled away just to fill it back in.

 

[paraone]

The transit geek in me is really hoping we don't get a dividing wall. It's one thing I really enjoy about the montreal metro.

 

[ARG1]

The transit geek in me is really hoping we don't get a dividing wall. It's one thing I really enjoy about the montreal metro.

Unfortunately that's no longer possible due to modern fire codes. Even in Montreal, the REM built a dividing wall in the Mont Royal Tunnel where it previously didn't have one due to said fire codes.

 

[Sauga89]

Metrolinx says a stretch of McCowan Rd north of Sheppard will be completely closed from this Thursday night until Tuesday morning. It's a total 4 day shutdown of all lanes between Sheppard and Nugget Ave. Cars and buses will be diverted while they re-work a culvert. Sidewalks will be closed as well.

View attachment 698555

Here is the list of buses affected, from the above notice:

This McCowan road closure is being extended until early Friday Dec, 5. The road was originally supposed to re-open in the early hours of Tuesday morning, but the closure is being extended by an additional three days due to unforeseen difficulties with the culvert work.

The 24 hours a day work and required road closure, previously scheduled from Thursday, November 27 at 9:00 p.m. to Tuesday, December 2 at 5:00 a.m., is now scheduled to extend through to Friday, December 5 at 5:00 a.m.

• This is due in large part to unforeseen circumstances with the condition of the culvert upon excavation and continued excess water management onsite.

• Work will continue to take place 24 hours a day, and we have added resources to maintain progress and ensure safety.

• Once work at this location is complete, the roadways will be reopened as quickly as possible.