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salsa
Senior Member
Metrolinx @Metrolinx
After a 3,300 meter journey, Don and Humber arrived at Yonge Street today.
Metrolinx @Metrolinx
In total, they installed 26,178 precast concrete tunnel segments, which formed 4,363 rings.
Metrolinx @Metrolinx
TBMs Dennis and Lea completed tunnelling on the western segment when they reached Yonge Street in May 2016.
After a 3,300 meter journey, Don and Humber arrived at Yonge Street today.
Metrolinx @Metrolinx
In total, they installed 26,178 precast concrete tunnel segments, which formed 4,363 rings.
Metrolinx @Metrolinx
TBMs Dennis and Lea completed tunnelling on the western segment when they reached Yonge Street in May 2016.
cplchanb
Senior Member
and..........................the extraction shaft isnt even done yet.....talk about a scheduling blunder....
they couldve had a great opportunity to catch up on lost time but now theyll have to wait another few months just to start extracting......
they couldve had a great opportunity to catch up on lost time but now theyll have to wait another few months just to start extracting......
Zach6668
Active Member
Pretty sure this is the plan. Aren't they dismantling these things when they dig for the station? They're going to have to dig to continue the track west of where the machine stopped anyways.
cplchanb
Senior Member
One thing I don't really understand is why they are so afraid of concurrent activity on this job. They had an opportunity to dig stations as they tunnel through and construct track as they they progress west but nope....they must build one piece at a time... Very rigid mindset
sixrings
Senior Member
i believe its because they are spreading out their bills versus paying for everything at once which is what we all would like
cplchanb
Senior Member
"Shakes head in disappointment" have they not learned that spreading out costs subjects them to a strong likelihood of inflation, more delays and flip flopping.....
Zach6668
Active Member
Because they aren't even close to having a completed design.
Zach6668
Active Member
Think of how complex a station like Yonge/Eg will be to engineer (and value engineer) to ensure that the PA is met, MX, TTC, City, etc are all happy. Can't be done overnight.
cplchanb
Senior Member
That is a byproduct of a lax construction schedule. They don't need 5 additional years to design a station
crs1026
Superstar
Well, the tunneling drive was pretty much flawless. So the early arrival is good news. The project ends up with float that wasn't needed. One would expect that costs will be lower than they might have been. Whether ML gets the savings, or the contractor does, I don't know.
The extraction shaft may be a different contract than the tunnel itself. For that matter, the critical path may lie in how fast the conveyor and other utilities associated with the TBM's can be removed from the length of the tunnel. The TBM extraction itself may not be critical to the project schedule.
- Paul
The extraction shaft may be a different contract than the tunnel itself. For that matter, the critical path may lie in how fast the conveyor and other utilities associated with the TBM's can be removed from the length of the tunnel. The TBM extraction itself may not be critical to the project schedule.
- Paul
TheTigerMaster
Superstar
Wow. East tunnel was scheduled to be completed in November 2017. How was it completed so early?
rbt
Senior Member
So you have a strong preference for the Amsterdam system then? 90% of the line has been fully complete (and had maintenance costs!) for years but Centraal (the only station that actually matters) is still underway.
Would you really have opened the Eglinton line as 2 separate segments neither of which connect to Yonge? If not, why bother constructing then maintaining anything else before it's needed?
Zach6668
Active Member
Is the east tunnel "done"? Or is it just the boring? I don't know the specifics of that. They may still have to do tunnel work?
DonValleyRainbow
Senior Member
And it was a photo-op opportunity missed! I can't believe Metrolinx is so contemptuous of their political masters! /s