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Regional Boards => Canada => Topic started by: SteveG1988 on January 10, 2016, 11:20:05 PM

Title: Nipigon river bridge splits in the cold
Post by: SteveG1988 on January 10, 2016, 11:20:05 PM
http://www.tbnewswatch.com/News/379810/Newly_constructed_Nipigon_Bridge_splits_in_cold_
Title: Re: Nipigon river bridge splits in the cold
Post by: SignGeek101 on January 10, 2016, 11:47:59 PM
That bridge wasn't even done yet. I wouldn't want to be a trucker right now. That's the only road connecting Canada.

Wonder if that impacts the twinning being done on the highway (that caused the bridge to be built in the first place).
Title: Re: Nipigon river bridge splits in the cold
Post by: halork on January 11, 2016, 05:34:40 AM
Hopefully, the old bridge hasn't been irreparably demolished...   :no:
Title: Re: Nipigon river bridge splits in the cold
Post by: JREwing78 on January 11, 2016, 08:15:49 AM
It's going to be a major disruption. There's a fair amount of vehicle and truck traffic that can't use the detour through the U.S, either because they lack proper documents or because their vehicles aren't legal in the U.S.

There will likely be a considerable uptick in traffic on M-28 and US-2 for the next few weeks, as well as the International Bridge in Sault Ste. Marie. It won't be an amount that should cause congestion; Canadian traffic is not uncommon on those routes even with Hwy 17 open.
Title: Re: Nipigon river bridge splits in the cold
Post by: AsphaltPlanet on January 11, 2016, 09:37:43 AM
The bridge has reopened:

https://twitter.com/JeffWaltersCBC

Repairs will be forthcoming.
Title: Re: Nipigon river bridge splits in the cold
Post by: Stephane Dumas on January 11, 2016, 10:08:34 AM
Some folks on Skyscraperpage forum had some good sense of humor about it. :D
http://forum.skyscraperpage.com/showpost.php?p=7294713&postcount=4662
http://forum.skyscraperpage.com/showpost.php?p=7294813&postcount=4671
Title: Re: Nipigon river bridge splits in the cold
Post by: SteveG1988 on January 11, 2016, 12:51:09 PM
Ontario's biggest crack problem since rob ford left office
Title: Re: Nipigon river bridge splits in the cold
Post by: Kniwt on January 11, 2016, 01:15:16 PM
The bridge may be open to one lane, but the temporary fix isn't exactly confidence-inspiring: Crews simply loaded down the heaving side of the bridge with Jersey barriers to make it sag back down.

(http://bloximages.newyork1.vip.townnews.com/chroniclejournal.com/content/tncms/assets/v3/editorial/d/d5/dd502df8-b875-11e5-bf94-f30eda9c0c67/5693c6c44512c.image.jpg)
(Thunder Bay Chronicle-Journal photo)
Title: Re: Nipigon river bridge splits in the cold
Post by: JREwing78 on January 11, 2016, 01:21:44 PM
LOL! Nice!
Title: Re: Nipigon river bridge splits in the cold
Post by: kkt on January 11, 2016, 03:50:43 PM
Who could have known Ontario gets cold in the winter!
Title: Re: Nipigon river bridge splits in the cold
Post by: noelbotevera on January 11, 2016, 07:21:14 PM
We've already discovered that Alaska reaches -80 degrees Fahrenheit. That's -62.2 degrees Celsius. Pretty sure that Ontario can get that cold.
Title: Re: Nipigon river bridge splits in the cold
Post by: kkt on January 11, 2016, 09:02:55 PM
Perhaps they looked here:

http://www.weather.com/weather/monthly/l/Ontario+CA+USCA0806:1:US

and decided that 32 F was the coldest they needed to prepare for.  CA means Canada, right?
Title: Re: Nipigon river bridge splits in the cold
Post by: Alps on January 11, 2016, 09:38:09 PM
This solution only makes sense if the bridge was analyzed by structural engineers overnight and they confirmed that the bridge itself is sound, just not seated properly on the bearing. Something tying the bridge down snapped on the west end to allow the bridge to pull up. It's amazing that the bridge held together enough not to accordion toward the center pier and destroy itself - the deck is strong, but there's enough tension in the cables to break it.
Title: Re: Nipigon river bridge splits in the cold
Post by: getemngo on January 11, 2016, 11:27:40 PM
Glad it's partially back open. The alternative route around Lake Nipigon (http://cpfarrow.blogspot.com/2012/07/around-lake-nipigon-on-bicycletrip.html) is a whole lot of fun!  :sombrero:
Title: Re: Nipigon river bridge splits in the cold
Post by: ghYHZ on January 12, 2016, 06:40:31 AM
Perhaps they looked here:

http://www.weather.com/weather/monthly/l/Ontario+CA+USCA0806:1:US

and decided that 32 F was the coldest they needed to prepare for.  CA means Canada, right?


Pretty sure this is Ontario CA (California). The province of Ontario is too big for one chart to accurately show the weather across the province. It could be a hot summer day in Toronto and still quite cold in the far north.
Title: Re: Nipigon river bridge splits in the cold
Post by: kkt on January 12, 2016, 11:06:16 AM
Perhaps they looked here:

http://www.weather.com/weather/monthly/l/Ontario+CA+USCA0806:1:US

and decided that 32 F was the coldest they needed to prepare for.  CA means Canada, right?


Pretty sure this is Ontario CA (California). The province of Ontario is too big for one chart to accurately show the weather across the province. It could be a hot summer day in Toronto and still quite cold in the far north.

I guess I really do need to add sarcasm tags.
Title: Re: Nipigon river bridge splits in the cold
Post by: Jardine on January 12, 2016, 02:27:25 PM
Looks like upwards of 100 Jersey Barriers there, not exactly giving me a warm fuzzy feeling about either the bridge or the temporary fix.

I'm aware of that suspension bridge in Indonesia that was asymmetrically loaded during some suspension hanger work and collapsed (several causes for that, BTW) but I'm not too familiar with cable stayed spans and their response to asymmetrical loading.

Presumably they know what they're doing, but the same could have been said about the Indonesian collapse too . . .


 :hmmm:
Title: Re: Nipigon river bridge splits in the cold
Post by: cpzilliacus on January 12, 2016, 05:29:00 PM
This solution only makes sense if the bridge was analyzed by structural engineers overnight and they confirmed that the bridge itself is sound, just not seated properly on the bearing. Something tying the bridge down snapped on the west end to allow the bridge to pull up. It's amazing that the bridge held together enough not to accordion toward the center pier and destroy itself - the deck is strong, but there's enough tension in the cables to break it.

There are more details from the Toronto Sun here (http://www.torontosun.com/2016/01/11/nipigon-bridge-engineers-based-in-spain).

Quote
Sources say municipal politicians in northern Ontario have long been concerned about the material used for the bridge. According to a PowerPoint presentation (http://www.ogra.org/files/5a%20Ray%20Krisciunas_Prefabricated%20Bridge%20Construction%20in%20Ontario.pdf) on the Ontario Good Roads Association website, while the pre-cast deck, towers and structural steel were all sourced in Canada, the cables came from Spain and the expansion joints were manufactured in China.

Quote
A spokesman for the Ministry of Transportation says broken bolts were at fault.

Quote
“Uplift occurred at the northwest corner of the structure due to broken bolts at a bearing connection. Our engineers are on site and continue to investigate. At this point, it’s too soon to say if cold weather was a factor,” adds Annemarie Piscopo.
Title: Re: Nipigon river bridge splits in the cold
Post by: SignGeek101 on January 12, 2016, 09:38:55 PM
As a civil engineering student, it will be interesting to know what happened (even though I'm going into transportation engineering).

Many factors could have contributed to this, though the cold is a likely source.
Title: Re: Nipigon river bridge splits in the cold
Post by: cbeach40 on January 13, 2016, 09:14:05 AM
This solution only makes sense if the bridge was analyzed by structural engineers overnight and they confirmed that the bridge itself is sound, just not seated properly on the bearing. Something tying the bridge down snapped on the west end to allow the bridge to pull up. It's amazing that the bridge held together enough not to accordion toward the center pier and destroy itself - the deck is strong, but there's enough tension in the cables to break it.

There are more details from the Toronto Sun here (http://www.torontosun.com/2016/01/11/nipigon-bridge-engineers-based-in-spain).

*There are more details in a xenophobic and politically motivated article full of supposition and speculation, quoting an organization with a vested interest in the issue.

The location of the consultant's head office is irrelevant. The specs will be laid out by MTO and Ontario Provincial Standards, which any engineer worth his or her degree can understand and design to. If they failed to meet them they will be held liable for the repairs. And additionally, this is a company with years of experience with 407ETR. Cold weather is not exactly a new concept to them.
Title: Re: Nipigon river bridge splits in the cold
Post by: SteveG1988 on January 13, 2016, 10:42:29 AM
This solution only makes sense if the bridge was analyzed by structural engineers overnight and they confirmed that the bridge itself is sound, just not seated properly on the bearing. Something tying the bridge down snapped on the west end to allow the bridge to pull up. It's amazing that the bridge held together enough not to accordion toward the center pier and destroy itself - the deck is strong, but there's enough tension in the cables to break it.

There are more details from the Toronto Sun here (http://www.torontosun.com/2016/01/11/nipigon-bridge-engineers-based-in-spain).

*There are more details in a xenophobic and politically motivated article full of supposition and speculation, quoting an organization with a vested interest in the issue.

The location of the consultant's head office is irrelevant. The specs will be laid out by MTO and Ontario Provincial Standards, which any engineer worth his or her degree can understand and design to. If they failed to meet them they will be held liable for the repairs. And additionally, this is a company with years of experience with 407ETR. Cold weather is not exactly a new concept to them.

If someone changed a spec without the head office knowing. Like that walkway collapse where they took one threaded rod that was meant to support the weight of two platforms into a design that required a bolt to hold the weight of two since they replaced it with two rods, one attached to the upper platform instead of the straight down one.
Title: Re: Nipigon river bridge splits in the cold
Post by: triplemultiplex on January 20, 2016, 09:47:14 PM
(http://static.dougallmedia.com/tbnewswatch/articles/379810_85239873-m.jpg)
"Them Duke boys better grow some wings.  Or start flappin' their arms."
Title: Re: Nipigon river bridge splits in the cold
Post by: cpzilliacus on February 21, 2016, 04:17:19 PM
From the MTO: Nipigon River Bridge updates (http://www.mto.gov.on.ca/english/highway-bridges/updates/index.shtml)

The page above has a diagram showing the "hold down support system" which is described as "temporary repair" to the bridge.
Title: Re: Nipigon river bridge splits in the cold
Post by: CtrlAltDel on February 21, 2016, 07:29:20 PM
That bridge wasn't even done yet. I wouldn't want to be a trucker right now. That's the only road connecting Canada.

That strikes me as unnecessarily risky. It seems to be that, at least in most cases (and certainly not in the middle of Ontario), there should always be some sort of readily available domestic alternate route.

Are there any other choke points like this on the Canadian national highway system?
Title: Re: Nipigon river bridge splits in the cold
Post by: SignGeek101 on February 21, 2016, 09:18:22 PM
That bridge wasn't even done yet. I wouldn't want to be a trucker right now. That's the only road connecting Canada.

That strikes me as unnecessarily risky. It seems to be that, at least in most cases (and certainly not in the middle of Ontario), there should always be some sort of readily available domestic alternate route.

Are there any other choke points like this on the Canadian national highway system?

Other than the section between Nipigon and Thunder Bay, the only other one I can think of is between MB 44 and ON 17A in eastern Manitoba / Northwestern Ontario. The only numbered road currently that crosses the provincial line is the Trans-Canada. It's in the planning stages to be twinned there, but for now, that's it. That's certainly the only road suitable for truck traffic. I think that's the only other point.

Other parts of the country have the Trans-Canada Highway freeway, and have alternate routes. It just depends on where in the country it is.
Title: Re: Nipigon river bridge splits in the cold
Post by: vdeane on February 22, 2016, 07:28:43 PM
Both of those are in sparsely populated northern Ontario.  Not much demand for alternatives beyond the redundancy factor.
Title: Re: Nipigon river bridge splits in the cold
Post by: ghYHZ on September 23, 2016, 04:10:19 PM
Report on the bridge failure:

http://www.mto.gov.on.ca/english/highway-bridges/nipigon-bridge/pdfs/ae-exec-summary.pdf
Title: Re: Nipigon river bridge splits in the cold
Post by: halork on October 02, 2016, 06:35:09 AM
Report on the bridge failure:

http://www.mto.gov.on.ca/english/highway-bridges/nipigon-bridge/pdfs/ae-exec-summary.pdf

OK, so what next? More repairs?
Title: Re: Nipigon river bridge splits in the cold
Post by: SignGeek101 on October 02, 2016, 11:34:30 PM
I'm assuming it's business as usual. I'm sure they learned from their mistake and corrected it.
Title: Re: Nipigon river bridge splits in the cold
Post by: AsphaltPlanet on October 03, 2016, 10:17:17 AM
I think the repair that they built to restrain the western half of the bridge may have been somewhat temporary.  I would assume that additional work will be required in the future, particularly when the southern portion of the deck is constructed, as I would think that would have some implications on how the load at the western touch down will need to be restrained, but to be honest, I haven't been following the project closely enough to know exactly what the next steps are.
Title: Re: Nipigon river bridge splits in the cold
Post by: cpzilliacus on October 03, 2016, 11:46:29 AM
I think the repair that they built to restrain the western half of the bridge may have been somewhat temporary.  I would assume that additional work will be required in the future, particularly when the southern portion of the deck is constructed, as I would think that would have some implications on how the load at the western touch down will need to be restrained, but to be honest, I haven't been following the project closely enough to know exactly what the next steps are.

Anyone know if the bolts and related fasteners were manufactured in China?
Title: Re: Nipigon river bridge splits in the cold
Post by: AsphaltPlanet on October 03, 2016, 01:19:27 PM
I just skimmed through the bridge report, but I did not recall reading anything about the origin of any of the bolts.  The problem seemed to have been with both the selection of the bolts themselves, compounded by the fact that they were not adequately torqued.
Title: Re: Nipigon river bridge splits in the cold
Post by: cbeach40 on October 03, 2016, 03:16:09 PM
Both independent reviews checked the chemical composition and the mechanical performance of the bolts. They met specs. Therefore, where they were made is irrelevant.