[Coolibop]

Another intervention headwall to be constructed, about 1km south of the 401. Hopefully the TBM can reach it on its own.

View attachment 615139

Mid August? Anyone want to poke the invisible bear and ask how far we are behind?

 

[northyorker1]

During today's metrolinx board of directors meeting, starting at the 34:20 mark, we finally get the first public mention (hint?) of a problem with the TBM due to soil conditions.

 

[dowlingm]

"the thing about subways is you are underground and not disrupting traffic like my Uber Eats order"

 

[cplchanb]

During today's metrolinx board of directors meeting, starting at the 34:20 mark, we finally get the first public mention (hint?) of a problem with the TBM due to soil conditions.

Looks like they hired the wrong soil engineers

 

[crs1026]

Looks like they hired the wrong soil engineers

The question now becomes, who hired the better lawyers.

This is where the myth of having negotiated a "fixed price, contractor takes all the risk" contract breaks down.

- Paul

 

[rbt]

The question now becomes, who hired the better lawyers.

This is where the myth of having negotiated a "fixed price, contractor takes all the risk" contract breaks down.

Not Metrolinx. Their record in the courts isn't great.

Sometimes I think they sue for the press without any intention of coming out ahead.

 

[Rainforest]

Sounds more like "contractor charges extra for all the risk they are supposedly taking, and then may or may not actually pay to address that risk".

 

[Allandale25]

Soil conditions ‘hampering’ Scarborough subway extension tunnelling, Metrolinx CEO says

Phil Verster said the soil was 'different than expected.' He said Metrolinx is looking to provide a Scarborough subway extension update.

toronto.citynews.ca

 

[crs1026]

Deja moo.

Bumpy year for ‘boring’ Big Becky​

- Paul

 

[reinventingthewheel]

I figured as much 5 months ago! They should hire me on as a consultant, I expect to work 4 hours/week and receive a full time salary.

Referencing a Toronto soil map, I noticed that the investigation is being performed near the border of two distinct soil deposits.

I know little about the topic of soil engineering but there's a non-zero chance this plays a role in whatever complication is being investigated.

 

[Rogue2016]

​

In related news:​

Ottawa announces $758M in funding to help pay for new Line 2 subway trains​

https://www.cbc.ca/news/canada/toronto/city-replacing-line-two-subway-cars-federal-funds-1.7397051

 

[T3G]

Can politicians shut up? I mean Jesus. The ruling class is not exactly made up of the brightest minds in the country, but the soundbites in this article seem unusually vapid:

We need to have public transit that grows with the needs of our growing city," Deputy Prime Minister Chrystia Freeland said during Friday's announcement

Ontario's Minister of Transport Prabmeet Sarkaria said the announcement shows what happens when all three levels of government work together.

"We're celebrating a generational, once-in-a-lifetime investment to keep the TTC moving," she said.

Well, which is it, generational or once in a lifetime? And is this an admission that in 10 years when the TR replacements need to be procured there won't be any money coming for them?

 

[81-717]

And is this an admission that in 10 years when the TR replacements need to be procured there won't be any money coming for them?

And you're happy about that because?...

I get why you think of the T1s as the last "classic" design that you want to keep longer, but it's the first time hearing you say the same thing about the TRs. So one day you'll be saying the same about the future T1 & TR replacements, then?

 

[Allandale25]

I'm not clear what design choices he's referring to. The graphic he included seems to suggest one of his topics is the single bore TDM.

 

[nfitz]

I'm not clear what design choices he's referring to. The graphic he included seems to suggest one of his topics is the single bore TDM.

Yes, which only makes the TBM (and stations) deeper, and increases the soil being removed. And increases the odds of hitting a large erratic.

And then there's the bizarre design choices. Particularly the deep tunnel at Lawrence, rather than the original design to daylight at the creek just north of Lawrence, and use a bridge. This would have made Lawrence station very shallow - in a location where it's well known there are artesian conditions. The tunnel and station are now so deep, that they are going to need significant works under the station - which gets very close to a very productive sand aquifer. I can't wait until they make the "unexpected groundwater conditions" excuse in the mid-2030s for further delays.