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Old April 16th, 2007, 02:39 AM   #1601
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All I know is that it's some type of polymer foam, according to the Discovery Channel. Many fire extinguishers have this, but obviously the TBM would use different properties. I guess it'll depend on the type of material they'll be going through too. I don't think they used this so much in the past, but they all seem to now. It's mostly about ease of material removal - turns everything into slop.
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Old April 16th, 2007, 05:46 AM   #1602
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that would make sense, but wouldnet u think they would turn the pumps off if its not cutting anything?
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Old April 16th, 2007, 05:52 AM   #1603
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Quote:
Originally Posted by LosAngelesMetroBoy View Post
that would make sense, but wouldnet u think they would turn the pumps off if its not cutting anything?
This isn't the final breakthrough excavation site. This is the Vancouver City Centre Station pit. Waterfront Station, 3 blocks away, is where the tbm made its final breakthrough and where turned off the pumps and turned off the boring machine.

When the machine arrived at Vancouver City Centre Station, the pit wasn't completely excavated....the tbm had to bore through soil about 3-4 metres high to continue its journey to Waterfront.



Here's a picture of the Vancouver City Centre Station pit a few days after the tunnel boring machine left the site. You can see the tbm's concrete casting at the station:
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Old April 16th, 2007, 10:44 PM   #1604
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I'm my opinion the bid process was deeply flawed and it put the rights of the non-Bombardier companies ahead of the public. Bombardier was explicitly forbidden from incorporating cost savings in its bid that would flow from integration with the existing SkyTrain network. They could not factor in the benefits of simplified supply, operations, and repair infrastructure, nor the potential to increase capacity by diverting cars from the Expo/Millennium Lines. In other words, they were prohibited from presenting the true value of the Bombardier bid. It is madness.
I tend to agree - the boxing-in of scope in the name of fairness / avoidance of conflict has unintended consequences.

The main advantage would have been a for a bulk order of MKII cars. An extra siding to link to the Expo Line would have added costs and I understand that the operations and maintenence centre needs to be expanded just for the additional MKII cars on order, let alone Canada Line cars had Bombardier won.
I suspect that InTransitBC would still have won the bid given that MKII cars are narrower and 80m platforms would have been spec'd to be consistent with the Expo Line and M-Line, plus Bombardier did not think about placing the guideway under the road instead of the median.
Of course that doesn't justify the process.
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Old April 18th, 2007, 08:16 PM   #1605
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Stacked Tunnel @ King Edward - posted by sillygwailo on Flickr

image hosted on flickr
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Old April 20th, 2007, 03:15 AM   #1606
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Pics of the Waterfront Station breakthrough are now up at the Canada Line website:

http://www.canadaline.ca/gallery.asp...p=7&CurrPage=1











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Old April 20th, 2007, 05:44 PM   #1607
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ok, now i get it, thanks Mr. X
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Old April 21st, 2007, 07:50 AM   #1608
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Is this digging happening on an existing street? Where is the massive outcry from residents?
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Old April 21st, 2007, 08:23 AM   #1609
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Not just any street, one of the major streets in Vancouver (Cambie). There was no time for an outcry, as there was a false promise to tunnel the whole line. However, since the contract was kept a secret until the last minute, they changed it to say cut-and-cover instead and once it was revealed, work basically started.
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Old April 22nd, 2007, 10:25 AM   #1610
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Cool, Thanks
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Old April 23rd, 2007, 05:32 AM   #1611
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Quote:
Originally Posted by zivan56 View Post
Not just any street, one of the major streets in Vancouver (Cambie). There was no time for an outcry, as there was a false promise to tunnel the whole line. However, since the contract was kept a secret until the last minute, they changed it to say cut-and-cover instead and once it was revealed, work basically started.
where is the massive lawsuit? Or is canada not so lawsuit happy as the us
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Old April 23rd, 2007, 06:54 AM   #1612
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Quote:
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where is the massive lawsuit? Or is canada not so lawsuit happy as the us
they tried, but the courts ruled it as a major road project.
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Old April 24th, 2007, 08:58 AM   #1613
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"Preparations for the Vancouver 2010 Olympics are progressing so well, it's boring. We'd like there to be some challenges, so we [the IOC] could shout at them." - IOC (Sept. 2007)


"In medieval Europe if you didn't like somebody's argument and couldn't think of a real response you called them a witch and demanded they be burned at the stake. In the US you call them unpatriotic, and in Canada you call them racist."
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Old April 25th, 2007, 08:00 AM   #1614
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"Bus Service Discontinued at this Stop" — Excavation begins north of Broadway.




A crane prepares to lower components of the Tunnel Boring Machine into the work pit at Olympic Village Station.




The cutting head of the TBM, face down.




More TBM components await reassembly.
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"Preparations for the Vancouver 2010 Olympics are progressing so well, it's boring. We'd like there to be some challenges, so we [the IOC] could shout at them." - IOC (Sept. 2007)


"In medieval Europe if you didn't like somebody's argument and couldn't think of a real response you called them a witch and demanded they be burned at the stake. In the US you call them unpatriotic, and in Canada you call them racist."
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Old April 26th, 2007, 01:37 AM   #1615
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people along Cambie whined a bit about it - but honestly does anyone really drive there to shop at the two blocks of business? most of it is residential
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Old April 26th, 2007, 03:09 AM   #1616
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"My Homer is not a communist. He may be a liar, a pig, an idiot, a communist, but he is NOT a porn star." - Abe Simpson

"Preparations for the Vancouver 2010 Olympics are progressing so well, it's boring. We'd like there to be some challenges, so we [the IOC] could shout at them." - IOC (Sept. 2007)


"In medieval Europe if you didn't like somebody's argument and couldn't think of a real response you called them a witch and demanded they be burned at the stake. In the US you call them unpatriotic, and in Canada you call them racist."
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Old April 26th, 2007, 03:10 AM   #1617
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Photos by Unregistered


Richmond - No. 3 Road












Bridgeport











Bridgeport Operations & Maintenance Centre (OMC)










North Arm Bridge

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"Preparations for the Vancouver 2010 Olympics are progressing so well, it's boring. We'd like there to be some challenges, so we [the IOC] could shout at them." - IOC (Sept. 2007)


"In medieval Europe if you didn't like somebody's argument and couldn't think of a real response you called them a witch and demanded they be burned at the stake. In the US you call them unpatriotic, and in Canada you call them racist."
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Old April 27th, 2007, 10:37 PM   #1618
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New casting yard pics at the Canada Line website - for Vancouver, it looks awfully industrial!







The square profile suggests these are for a long span - maybe the North Arm Bridge (or if these are old shots, the Middle Arm Bridge):


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Old April 28th, 2007, 12:36 AM   #1619
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I find it quite amazing that the spans are held together by cable tension only.

A few questions: Are the cables replaceable? Can they easily be inspected for corrosion, fretting, fatigue (or whatever)? How are the cables secured at either end?
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Old April 28th, 2007, 02:07 AM   #1620
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I'm not an engineer - so can't say. I think they also epoxy the joints too. I'ts common throughout the world. Even the new Bay Bridge in SF is post-tensioned cabled.
Early post-tensioned cabled structures (well, one condo in downtown Vancouver) had corrosion in the cables in its floors, so it was a huge cost to fix.
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