News   GLOBAL  |  Apr 02, 2020
A Message to Our Readers
 10K     0 
News   GLOBAL  |  Apr 01, 2020
EarthCam Time-Lapse Documents Rafael Viñoly-Designed New Stanford Hospital Construction
 42K     0 
News   GLOBAL  |  Apr 01, 2020
Resort Town
 5.9K     0 

PL1 said:
Officially no. But the scuttlebutt (including from an engineer friend at the City) is soil conditions.
Click to expand...
even if we had more info on soil conditions, how would we mitigate those factors (since 1 cutting head can't deal with all soil types)?

My only thought is to drill cores along the route ahead of the TBM and insert chemicals to make the soil better to bore through.
Thoughts?
 
micheal_can said:
So,why would a twin bore be any better? Sounds like cut and cover might be the only real option. And, yes, I know closing parts of the 401to do it is a very bad idea.
Click to expand...
We don’t know if the big issue is related to tunnelling equipment or the tunnel integrity itself. If the latter then increasing wall thickness or switching to smaller twin bored tunnels makes all the difference (see: Cylinder stress).

But the problem is we simply do not know any details, so who’s to say what a possible path forward is? (rhet)
 
Allandale25 said:
What alternatives would exist at this point? Wouldn't it be very expensive and time consuming to go to a dual bore? How much has already been bored?
Click to expand...
Just pointing out there does happen to be a transit corridor from near the site of the stuck TBM to Kennedy Station, so I am poking fun at the folly of building this project by suggesting they go back to LRT and use the tunnel that has already been bored.
 
starbase said:

Contract Awarded for the Scarborough Subway Extension Stations, Rail and Systems Project​

January 28, 2025
Metrolinx has signed a $5.7B Target Price Agreement with Scarborough Transit Connect (STC) to design and build the Scarborough Subway Extension Stations, Rail and Systems (SRS) project.
As the first Progressive Design-Build transit project to reach contract award, it is also notably the first Target Price Agreement executed within the transit asset class in Ontario, providing Metrolinx with greater reliability in pricing, risk, scope and schedule.
The Progressive Design-Build model incorporated a two-year design process for this project, known as the Development Phase. Metrolinx and Infrastructure Ontario selected Scarborough Transit Connect as the development partner in November 2022, following a competitive and transparent procurement process.
Over the past two years, STC and Metrolinx have collaborated on design, costing, scheduling, early investigations and applicable early works. Now that all conditions have been finalized and accepted, a Target Price Agreement has been awarded to the Scarborough Transit Connect team.
Target Price refers to a jointly determined estimate by Metrolinx and STC of the total capital cost required to deliver the project.
The Scarborough Transit Connect team includes:
  • Applicant Leads: Aecon Infrastructure Management Inc., Fomento de Construcciones y Contratas Canada Ltd.
  • Construction Team: Aecon Infrastructure Management Inc., Fomento de Construcciones y Contratas Canada Ltd.
  • Design Team: Sener
The scope of work for the SRS contract includes:
  • Design and construction of three new underground stations and bus terminals at each station.
  • Design and construction of emergency exit buildings, service buildings and traction power substations.
  • Installation, testing and commissioning of all systems equipment and interconnection with existing TTC systems.
  • Design, supply, installation, testing, and commissioning of all rail and track components and a pocket track east of Kennedy Station.
  • Coordination with the Advance Tunnel contractor on remaining work.
Metrolinx is delivering the 7.8-kilometre Scarborough Subway Extension through two large contracts: the SRS contract and the Advance Tunnel contract. The subway will remain publicly owned by the Province of Ontario and operated by the TTC as part of Line 2.
The Scarborough Subway Extension is one of the five priority transit projects in the Greater Toronto and Hamilton Area. The other projects include the Yonge North Subway Extension, the Eglinton Crosstown West Extension, the Ontario Line and the Hamilton LRT.
For more information, visit Infrastructure Ontario and Metrolinx.
Click to expand...
With that the total "fixed" price is 820 million per km for the extension
 
Allandale25 said:
Underground bus terminals I would have to assume are part of it. It's too bad we can't see a more detailed breakdown for easier comparison work.
Click to expand...
From what we know, I think all three stations are getting above ground bus terminals.
IMG_3632.pngIMG_3633.pngIMG_3634.png
 
TOtramz said:
According to these diagrams it would seem that the purple bus area does not lie in the underground station area? So are they underground or not?
Click to expand...
Definitely doesn't look like it. Although one thing is the Scarborough Center station doesn't have a "bus terminal area" just the building, and then what looks like roads through it, which might mean indoors?
 
What will happen to the current scarborough centre station? The current station has great access to the STC mall and is Triton road is very convenient for bus movement.
 
The bus lanes for the Scarborough RT shuttle need attention ASAP. Either repave the lanes or tell the drivers to slow down…there is no reason for busses to be going 50 to 60km/h on a pothole filled bus lane. I felt my brain hit my skull when a bus ran over a deep pothole at 60km/h just a few days ago.

Some drivers have abandoned using the lanes altogether and drive in mixed traffic late at night and early in the mornings. That’s how bad they’ve gotten.
 
6ixGod said:
The bus lanes for the Scarborough RT shuttle need attention ASAP. Either repave the lanes or tell the drivers to slow down…there is no reason for busses to be going 50 to 60km/h on a pothole filled bus lane. I felt my brain hit my skull when a bus ran over a deep pothole at 60km/h just a few days ago.

Some drivers have abandoned using the lanes altogether and drive in mixed traffic late at night and early in the mornings. That’s how bad they’ve gotten.
Click to expand...
For some reason when I read this the first time I thought you were talking about the busway (not bus lanes), then when I re-read it just now I realized the busway doesn't even exist 😆
 
6ixGod said:
The bus lanes for the Scarborough RT shuttle need attention ASAP. Either repave the lanes or tell the drivers to slow down…there is no reason for busses to be going 50 to 60km/h on a pothole filled bus lane. I felt my brain hit my skull when a bus ran over a deep pothole at 60km/h just a few days ago.

Some drivers have abandoned using the lanes altogether and drive in mixed traffic late at night and early in the mornings. That’s how bad they’ve gotten.
Click to expand...

Someone has obviously never ridden a GM Fishbowl through a pothole. If you had, you would know things could be alot worse.

I recall a few times where I rode through a pothole on a fishbowl, bounced out of my seat and thought the windows would blow out.
 
You must log in or register to post here.

Back
Top