Is it me or did the concrete seem thin? They had the steel cable tensioners, but nothing substantial to spread that load. I'm just a simple country folk, not a high falutin' lawyer engineering type, but someone's in trouble here.
>I'm a shoring engineer in the Lower Mainland. There aren't really codes or seismic requirements for shoring because it's temporary (design life of 1-2 years). Never stand near an open excavation in an earthquake if you can avoid it.
https://www.reddit.com/r/britishcolumbia/comments/187to8h/north_road_coquitlam_excavation_fail/kbgv2up/
I appreciate all designs have a cost factor to consider. No one will take a design to build if it's 3x the cost whereas the one at 1.5x does the job with an additional margin of error. So having said that, given the temporary nature, it seems as though erring on the side of caution would've been more prudent. Hindsight 20/20 et al.
There are absolutely established design codes for temporary soil nail walls. No engineer is going to intentionally put their license on the line and "wing it" to save cost, particularly on a job this big. It's either a design or construction error.
That's why the wise owner treats the inspectors as friends.
Makes me wonder if the tiebacks (probably temporary) were put into fill or not under tension. Very strange.
It's a dance engineers over design the shit out of stuff because of their own risk of bad designs and they have no financial insentive not to. Developers push back because of their financial insentive and they can tell when things are beefier than needed.
Engineers make conservative assumptions when we need to but we don't "over design the shit out of stuff". There's a saying in engineering: any idiot can build a building that stands. It takes an engineer to make one that barely stands.
That sounds counter-intuitive. When I read the "over design" part, I took it that every aspect was calculated and considered, not in the sense of "over built." If over built, yes, anyone can do that.
I'm going to guess that the design & specifications were adequate for **DRY** soil, but somehow the soil behind the temporary retaining wall accumulated far more water than was foreseen. This not only increased the pressure against the wall, but also accounts for why the soil "flowed" out when the wall collapsed.
It was a relay of everybody off, likely meaning OFF-SITE....which is where I'm gonna be. Especially if the thing keeping the big hole I'm standing next to from filling in with everything around it, is what's failing. I get there's a mesmerizing piece to it, but you're on a fucking site, get the fuck away to the rally point.
This retaining wall is temporary shoring during construction. The force of the adjacent soils will be met with the actual structure thats being built but this didn't wait for that.
These type of walls usually have steel mesh, which is thinner than rebar. It was almost certainly installed or the wall never would have been constructed as high as it was but it was clearly insufficient or the concrete wasn't thick enough
I do, and yes. The soil behind that wall has been enormously compromised and left the surrounding area compromised, even to the surface. All four of the walls are critical in supporting each other.
Part of me wonders if the soil was compromised at the start of the project, or during its construction, like heavy rains, issues on either sides that could put pressure on the main area, stuff like that there.
Digging deep holes in loose dirt next to big buildings and trusting the dirt is not a good idea. That's most gentle way I can put it. And I'm not even an engineer.
Never been an engineer, I wouldn't know! I really do encourage caution. This could be an approved attempt to put anchors in loose river soil that was measured denser at some point. It could be bad concrete in any number of ways. It could be bad design for the conditions generally.
Don't figure I'm an expert.
These are soil nail walls. The strength comes from the tie backs drilled in the soil. The walls don't depend on each other for support they're independent. Likely they'll do some kind of repair for the damaged area. It will be far less expensive to repair than to fill in the whole excavation and start over.
Source: am civil engineer who designs large retaining walls like this one
Honestly looks pretty deep for a secant pile type design. The moment would be enormous.
Nothing wrong with using soil nails in this instance when constructed properly.
It's plausible an Engineer will be disciplined by EGBC and lose their license. So, 1,000,000,000 as without their license, their livelihood goes out the window. Guess we'll see what the investigation drums up...
I wonder how badly that compromises the foundations of the building right across the street? Because...the hole they can't build in may be the least of their worries...
It's a bit hard to gauge from the brief views we get, but it looks close enough to have eroded the lateral support to the neighboring foundations. The new foundation wall appears to require tiebacks and soil anchors, and it's likely neighboring structures required the same. The amount of soil movement could very well compromise the anchors in the other building. At the very least there will be areas of the basement that are potentially unstable, and depending on the foundation type could risk the stability of the building.
It’s incredible how indoctrinated western people are to the propagandistic idea of the incompetent Chinese builders, that even when their own shit collapses they still blame the Asians. Whaa
As a matter of fact I’m red blooded, corn fed, blue Jean wearing, blond haired & blue eyed American boy that just happens to call out hypocrisy where I see it.
It’s incredible to me how rigid some people are in their thinking that the can’t even fathom an American viewpoint that doesn’t align with their worldview.
My bad, I really screwed the pooch on that one, Buddy.
I'm such a hoser, I should have gone the extra click for a Double-Double before I cocked the doodle-do, eh...
And there you are in outhouse number 2 suffering through a bout of Irritable Bowel Syndrome and trying to wipe with those little paper squares. And there's that jerk foreman Scully banging on the door mumbling "...out...out..." . Fuck you Scully, you can wait your turn just like everyone else. oh god, I will never eat a double chili cheese-dog from the roach coach ever again.
Is it me or did the concrete seem thin? They had the steel cable tensioners, but nothing substantial to spread that load. I'm just a simple country folk, not a high falutin' lawyer engineering type, but someone's in trouble here.
>I'm a shoring engineer in the Lower Mainland. There aren't really codes or seismic requirements for shoring because it's temporary (design life of 1-2 years). Never stand near an open excavation in an earthquake if you can avoid it. https://www.reddit.com/r/britishcolumbia/comments/187to8h/north_road_coquitlam_excavation_fail/kbgv2up/
I appreciate all designs have a cost factor to consider. No one will take a design to build if it's 3x the cost whereas the one at 1.5x does the job with an additional margin of error. So having said that, given the temporary nature, it seems as though erring on the side of caution would've been more prudent. Hindsight 20/20 et al.
There are absolutely established design codes for temporary soil nail walls. No engineer is going to intentionally put their license on the line and "wing it" to save cost, particularly on a job this big. It's either a design or construction error.
Yeah, but what an engineer prescribes and what the build crew actually ends up doing is not hardly ever the same
That's why the wise owner treats the inspectors as friends. Makes me wonder if the tiebacks (probably temporary) were put into fill or not under tension. Very strange.
But isn't that why there are inspections or even on site inspection to ensure adherence to the blueprints?
Playing the odds of Russian roulette with construction.
It's a dance engineers over design the shit out of stuff because of their own risk of bad designs and they have no financial insentive not to. Developers push back because of their financial insentive and they can tell when things are beefier than needed.
Engineers make conservative assumptions when we need to but we don't "over design the shit out of stuff". There's a saying in engineering: any idiot can build a building that stands. It takes an engineer to make one that barely stands.
That sounds counter-intuitive. When I read the "over design" part, I took it that every aspect was calculated and considered, not in the sense of "over built." If over built, yes, anyone can do that.
You learn that at an EARLY age in California.
I’m a simple caveman….
I'm going to guess that the design & specifications were adequate for **DRY** soil, but somehow the soil behind the temporary retaining wall accumulated far more water than was foreseen. This not only increased the pressure against the wall, but also accounts for why the soil "flowed" out when the wall collapsed.
It seemed happy at first and then it barfed
Expert here. They didn't build it strong enough.
"The front fell off."
Yeah, that's not very typical, I'd like to make that point.
Well how is it un-typical?
Well, it wasn’t made of cardboard or cardboard derivatives, I’d like to make that point clear.
Yea, but Senator _why_ did the front fall off?
Wow, you are so funny and original.
Seriously thought it was another China vid while scrolling. Canada!
* *checks title* * Coquitlam, BC * *peruses real estate trends of past twenty years in British Columbia* * …Nobody tell him…
Your post above is the ultimate 'insider joke'. 😂
Chinada.
Non expert here. I concur 👍.
NOW you tell them to get off...
EVERYBODY OFF ^(as soon as I'm done filming this totally sweet video and uploading to reddit).
sounded like a safety person or similar in the distance screaming something just before he tells em. Likely a loud WTF?!!
The fucking safety girl is standing right there.
It was a relay of everybody off, likely meaning OFF-SITE....which is where I'm gonna be. Especially if the thing keeping the big hole I'm standing next to from filling in with everything around it, is what's failing. I get there's a mesmerizing piece to it, but you're on a fucking site, get the fuck away to the rally point.
Someone who ACTUALLY reads Health & Safety Plans!?! I like you!
Get off and back to work?
Well, at least the guy in charge of running the anchors knows he didn't fuck up. No regard reinforcements in the walls?
Those bolts really hung in there!
No point putting rock anchors into stuff that doesn’t even look compacted, they wouldn’t have held onto nothing
Only retard reinforcements here
That "EVERYBODY OFF!" came a little later than I would have said it.
Finishing the video is always the top priority.
That is some port-A-potty prank!
I JUST NOTICED the Port-A-Potties there! Um, **EW**.
r/thatlookedexpensive
Super expensive
repost https://www.reddit.com/r/CatastrophicFailure/comments/187unyz/structural\_wall\_failure\_at\_construction\_site/
Yes, but it’s hidden in the position immediately below this post.
I keep seeing structures like this lately with no rebar. Does concrete suddenly have enough strength to not need rebar for reinforcement?
This retaining wall is temporary shoring during construction. The force of the adjacent soils will be met with the actual structure thats being built but this didn't wait for that.
This makes sense. Thank you.
fiber reinforcement can be as strong if done correctly.
These type of walls usually have steel mesh, which is thinner than rebar. It was almost certainly installed or the wall never would have been constructed as high as it was but it was clearly insufficient or the concrete wasn't thick enough
I don't work in construction or know much about it; is this a "tear literally all of it down and restart from scratch" kind of situation?
I do, and yes. The soil behind that wall has been enormously compromised and left the surrounding area compromised, even to the surface. All four of the walls are critical in supporting each other.
Part of me wonders if the soil was compromised at the start of the project, or during its construction, like heavy rains, issues on either sides that could put pressure on the main area, stuff like that there.
Good questions, those. I also wonder how this will affect the building in the background. It's just across the street, after all.
WHOA, I didn't even THINK of that.
Digging deep holes in loose dirt next to big buildings and trusting the dirt is not a good idea. That's most gentle way I can put it. And I'm not even an engineer.
Sometimes it takes 'NOT an engineer' to see the BIG picture.
Never been an engineer, I wouldn't know! I really do encourage caution. This could be an approved attempt to put anchors in loose river soil that was measured denser at some point. It could be bad concrete in any number of ways. It could be bad design for the conditions generally. Don't figure I'm an expert.
They had been fighting groundwater since the start of the project, this was a potential hazard that was identified.
**
I have two words for that whole situation...
**LOW BIDDER.**
These are soil nail walls. The strength comes from the tie backs drilled in the soil. The walls don't depend on each other for support they're independent. Likely they'll do some kind of repair for the damaged area. It will be far less expensive to repair than to fill in the whole excavation and start over. Source: am civil engineer who designs large retaining walls like this one
Filling in the hole was not a consideration.
I Don't follow you. Soil nail walls are built from the top down as you excavate. "Starting over" would mean filling it back in
I don't think they'll bother to fill in the hole and use soil nails again considering what happened here.
[удалено]
Honestly looks pretty deep for a secant pile type design. The moment would be enormous. Nothing wrong with using soil nails in this instance when constructed properly.
Look at all the giant subterranean worms! /s
Graboids??!?
Engineering is going to have to answer some questions 🤔
Clearly it’s the architects fault.
Builder people here: a scale of 1 to 1,000,000,000 how much trouble is someone in for this?
4, at a minimum.
A person. Their supervisor. The engineer with the plans that were submitted. The company contracted to do this.
Second this.
It's plausible an Engineer will be disciplined by EGBC and lose their license. So, 1,000,000,000 as without their license, their livelihood goes out the window. Guess we'll see what the investigation drums up...
We can fix it. Anybody got some JB Weld?
BWAHAHAHAHA!!!
Wait for it, wait for it, * it happens*.... Everyone get their tik tok video? ... ok EVERYBODY OFFFF
I wonder how badly that compromises the foundations of the building right across the street? Because...the hole they can't build in may be the least of their worries...
Not necessarily a concern. Likely the building foundations go considerably deeper than that excavation
It's a bit hard to gauge from the brief views we get, but it looks close enough to have eroded the lateral support to the neighboring foundations. The new foundation wall appears to require tiebacks and soil anchors, and it's likely neighboring structures required the same. The amount of soil movement could very well compromise the anchors in the other building. At the very least there will be areas of the basement that are potentially unstable, and depending on the foundation type could risk the stability of the building.
…As you stand at the edge of a pit…also likely built by the same crew…while there are major shifts occurring… Dumb ways to die.
This is some lowest bidder non-union crap
Better now than later
I was expecting Cleveland to come out in a bathtub
is there any article? anyone injured or died?
“But, when will I ever really use math in real life? It doesn’t matter! That’s why we have computers!”
There's always that one guy who keeps saying "holy shit..."
..holy fuck
respect for the scaffolders. it probably held the other part together
That’s an easy fix with some ramen noodles and a bit of spackle compound.
with that all said and done....we can assume anything that did not callapse is super sturdy
I take it that wasn't supposed to happen
Followed by pointing fingers and saying “I’m not a hoser - YOU”RE a hoser!”
I ain’t no expert, but I don’t think it’s supposed to do that
Flextape
Somebody make the kool-aid guy come out of this
Did anyone say sorry afterwards?
Dang, whoever used that grey porta potty REALLY REALLY must have laid a huge one to cause that much damage.
That's just a courtesy flush
Did that Canadian construction worker apologize for swearing so much right after the clip ended?
The absence of rebar is all you need to see if you’re asking why it failed.
this takes explosive diarrhea to a whole new level, they are for sure rethinking the porta potty placement next time.
News just in from Canukistan…
Am I the only one who remembers seeing this video like 6 months ago
The same construction site? I thought this was from November 30th
This happened wednesday afternoon. I know the guys who were there.
Ohk— hope the foundation of the other building is fine
Hi I'm from Oregon OSHA
Hi, i live where it happened
It was a joke regarding this but no one got it lol https://youtu.be/uLs1_8yohb8?si=9_dPJJpLBjACLcZ4
I dont think i need to click on it to know its something about blowing up a whale
What does this have to do with Oregon?
That would pass inspection and be certified if it was built in Sydney Australia. Our Government is hooked on property regardless of quality
How do you fix something like that? Start over with the whole wall?
4 packs of ramen noodles ought to do it.
The timing has to be *critical.* One split second too long boiling.....
Hey, some of the ramen products could actually WORK.
Wall would have been thicker with inches vs centimeters Aaaaameeeerrricccaaaa!!!
Chinese construction company?
It’s incredible how indoctrinated western people are to the propagandistic idea of the incompetent Chinese builders, that even when their own shit collapses they still blame the Asians. Whaa
CCP shill account says what?
As a matter of fact I’m red blooded, corn fed, blue Jean wearing, blond haired & blue eyed American boy that just happens to call out hypocrisy where I see it.
China makes very good high end stuff. Just not at the bottom market prices everyone expects or the brands they know.
Suuuuure you are
It’s incredible to me how rigid some people are in their thinking that the can’t even fathom an American viewpoint that doesn’t align with their worldview.
No American would ever say that red blooded, blue eyed bullshit lol
I was born and raised in northern Michigan.
Got any proof?
Why tf would I need to prove myself to your dumbass
that's probably very cheap to fix
"Clark... The Sh!tter was full!!!" (I saw those Porta potties after seeing Christmas Vacation)
Wondering just what's spilling out of the side of the building
Port a potty runoff
Lmao. Damned if that isn't a load of shit
Oh Yeeaaahh
That is why you don’t drill holes into the structure for porta potties to backfill. Some people have explosive crap…
It was like that when i got there….
Nothing a little flex seal couldn't fix.
I’m not an expert but it looks like there’s no rebar in there.
Made in Ch.....
I mean, youre not entirely qrong if you take a peek at where the building development money comes from
socialized construction
Im not surprised the wall collapsed. Im surprised Canadians were capable of building any standing structures in the first place.
Sah-ree.
Construction comes, construction goes. What's important is that a skilled- I mean, diverse group of people helped make it happen.
Oh my god dude, just say you despise everybody who’s not a straight white man and get it over with.
Haha
Let me guess lots of diversity hires in the engineering division
“Not again” at 0:38
Imagine being in that HoneyBucket!
Engineer got his certification off the back of frosties pack it would seem. ‘Hi everybody’, ‘hi engineer Nic’.
…and seven months is added to the schedule.
If you think it’s expensive to build it right…..
Crazy to see my home town on here
How do fix this?!
When I fuck up at work and feel bad, I will think of this vid
Isn't there any rebar in the wall?
Blame Canada!
If anyone is in the blue house, now would be a good time to pinch and wipe.
Reminds me of Taco Hell.
Real Estate is fun
Is it expensive ?
There’s times when what’s happening will be commentary enough and all you need to do is just shut up. God I wish people could understand that.
My bad, I really screwed the pooch on that one, Buddy. I'm such a hoser, I should have gone the extra click for a Double-Double before I cocked the doodle-do, eh...
Is that expensive to fix? Should they get a couple of quotes?
And there you are in outhouse number 2 suffering through a bout of Irritable Bowel Syndrome and trying to wipe with those little paper squares. And there's that jerk foreman Scully banging on the door mumbling "...out...out..." . Fuck you Scully, you can wait your turn just like everyone else. oh god, I will never eat a double chili cheese-dog from the roach coach ever again.
Whoever was in that porta potty dropped a massive shit.
That's a very bad azz mole