Millennium Line - Evergreen Extension | Completed

[officedweller]

Colony Farm?

In that case - I suspect that maybe it's being used for habitat restoration / compensation for the Port Mann Highway 1 project.

i.e. MoTI making use of a "waste" product from the Evergreen Line as a "construction material" for Port Mann work (instead of purchasing soil from another source).

efficiency in action - someone is thinking....

[Tomac]

[Meraki]

Originally Posted by Tomac

Column Pics

Well that column looks... interesting.

Are the weird bits like in this picture due to a mistake in construction or will it eventually dissapear?

[TransitFreak]

Yeeshhhh....talk about 'Franken' column...in the spirit of upcoming Halloween? Looks like this was a bad form job, compared to the other pics of the previous columns? Wonder if because it's a banked turn, and resulting angle of the column, that caused some inconsistencies. I noticed that they had a black tarp area beside the column, so this may have just been a defective one? There was a crack there too, yikes...

I'm sure it's all blemishes and such, but yeah, this one will need a bit of attention...and I'm not commenting on the double stripe pattern down the column, that's looking like a design feature...

[Zassk]

Hmm, nice patch-up job on a brutal blemish. That doesn't inspire confidence, does it? Makes you wonder how many voids are deep inside the column. I don't recall seeing anything like that on the Millennium or Canada Lines during construction. Then again, SNC Lavalin built all 3 of them (including Evergreen) didn't they?

[nname]

I think that's pretty common, it just that no one notice it before they patch it up (digital camera was far less common in the 90s-2000s when they build the M-Line, right?). I do recall for Canada Line, they once made the excavation too small and the precast tunnel segment won't fit, so they had to redo them. That was on the news, and the contractor responded with "its normal for these types of construction".

Either way, I think what's holding up the structure is not really the concrete, but what's inside it...

[libtard]

Thumbs down at the whole construction site. Seems like a 2 bit operation

[queetz@home]

Geeze! Its a column, not Michelangelo's David! It doesn't have to be pretty...if the engineers say its good, then its good. If it collapses in the future, then sue EGRT...

[Alex Mackinnon]

It looks like they may have needed some stronger vibrators running, but you can patch that. Not very exciting.

[MIPS]

Originally Posted by queetz@home

Geeze! Its a column, not Michelangelo's David! It doesn't have to be pretty...if the engineers say its good, then its good. If it collapses in the future, then sue EGRT...

The last thing we want is the line closing after an earthquake because 70% of the columns developed deep cracks and need to be replaced.
As a taxpayer you would lynch the engineering firm for turning a blind eye.

If it didn't have to look pretty why are we not using the original Expo column and guideway design? We can't handle the long spans on the road anymore?

[queetz@home]

Originally Posted by MIPS

The last thing we want is the line closing after an earthquake because 70% of the columns developed deep cracks and need to be replaced.
As a taxpayer you would lynch the engineering firm for turning a blind eye.

If it didn't have to look pretty why are we not using the original Expo column and guideway design? We can't handle the long spans on the road anymore?

Here is the contact link! Contact them and ask them to tear down that ugly column and make it into a perfect one with no cracks whatsoever!

[nname]

Originally Posted by MIPS

If it didn't have to look pretty why are we not using the original Expo column and guideway design? We can't handle the long spans on the road anymore?

After a very very big earthquake, I'm pretty sure the Expo line guideway have a bigger chance of falling than the Millennium or Evergreen guideway...

[tybuilding]

Originally Posted by nname

After a very very big earthquake, I'm pretty sure the Expo line guideway have a bigger chance of falling than the Millennium or Evergreen guideway...

Today's normal building code ~= 1985 post disaster building code or about 70% of today's post disaster

[xd_1771]

Construction time, cost and ease. There are some short sections of the M-Line using Expo Line style guideways - just travel North Road south of Lougheed sometime.

[TransitFreak]

WRT to the Millenium line using girders inside of segments at Lougheed, I remember asking the construction group back in the day (they used to have a website with construction pics too) about that. They said due to the amount of switches, and tight turns, the segments would not have provided the necessary strength to support all that (for the switch area), and for the tight turn there, the turning radius was too much for the segments to handle, hence the box girder style construction...

I'm pretty sure you'll see that same construction method for the turn 'up' north to North Road for the Evergreen line until it straightens out...

As for the VCC clark area, I suspect it's due to the station being built afterwards, it was easier to just use the girder method vs. relaunching the gantry and such.

Interesting note, if you look at the guideway west of Gilmore, where the tight turns are, you'll notice a couple of columns that have a solid section on top, and not the traditional ends of a span...I remember asking that too long time ago, and it was explained that due to the curviness of that area, it was deemed unstable, so they had to in essence create a longer span by joining up some sections with this sectional piece 'fused' directly on top of the column cap, as opposed to either side like it normally does...

Ahh, the good old days of Millenium line construction watching...has it been over 10 years already? lol...

[deasine]

Originally Posted by TransitFreak

As for the VCC clark area, I suspect it's due to the station being built afterwards, it was easier to just use the girder method vs. relaunching the gantry and such.

There's two switches within ~60m which could possibly explaining for the choice of gantry construction.

[officedweller]

Thanks for all the info.

They also use "special structures" for long spans.
The segment crossing TCH at North Road wasn't built with a gantry spanning TCH - it was built using the balanced cantilever method - with segments added evenly to the columns on each side of TCH and cantilevering out over the highway.


Balanced cantilever structure over the Trans-Canada highway.
http://www.canadianconsultingengineer.com/news/award-of-excellence-skytrain-expansion/1000116871/

[TransitFreak]

Yeah, like the Canada Line bridge to the airport and going over arthur laing bridge...I remember looking at the column structure for the north arm bridge, and wondering where all the concrete is - there's a void there that you don't see on the Millenium line...

Sorry for being off-topic, I'm wondering if there will be any special structures on the Evergreen line...I'm thinking spanning Barnet Hwy/Lougheed hwy intersection as that's one massive intersection headed towards Lincoln station...

[GeeCee]

It looks line those indents/lines in the columns are for.. believe it or not.. lighting.

The city is currently negotiating with the province for park-and-ride sites for 150 to 200 spots around SkyTrain stations in Coquitlam, he said. As well, the province has agreed to put special effects lighting into columns along North and Clarke roads and Pinetree Way.

http://www.tricitynews.com/news/226358201.html

[dpogue]

That has potential to be pretty cool. The lighting around the Canada Line columns in Richmond are a nice touch.

Video this morning of construction around Lougheed