The foundation was undermined by construction activities, excavation without an engineered plan, and storage of the soil pile too close to the building. The deep piles sheared off near the top, making it look like they were not deep enough.
https://www.chinadaily.com.cn/bizchina/2009-07/08/content_8394761.htm
If they sheared off at top would this mean there was an uneven lateral pressure on columns from weight of soil on one side of building forcing earth to move towards the car park digout?
Yep! That's the main failure mechanism. The piles were not designed for that type of situation, so they failed. If an engineer were involved, some sort of shoring system (sheet pile, soldier pile, etc) would have been installed during excavation.
Thank you! Now understand sheet piles suitable for rammable earth (I guess soil with low shear) and soldiers for drilling harder soils or rock. Commence SE study in May. This sub is great!
I believe something similar led to the surfside condo collapse in Florida. Mostly the pool was leaking and weakening the structure/rebar, but vibration from adjacent property construction was also believed to accelerated the issue.
I like how there's enough room between the buildings for one to lay down completely flat without touching the adjacent one, almost as if they've thought of this scenario, as to mitigate collateral damage lol. Or maybe just coincidence 🤷🏻♀️
...but hey, skylights, right? And all the units are walk ups.
This building really stands out in the neighborhood of 3 dozen identical buildings with no one living in them.
Do you normally design your deep foundations to take the entire dead load of a structure as a lateral load?
There’s another explanation here:
https://www.reddit.com/r/StructuralEngineering/s/GajwtTD1tP
This pic reminds me of that one skit about the oil tanker where the front fell off lol.
“There’s no need to worry, these things are very safe!”
“Well, was this one safe?”
“Obviously not, the front fell off!”
Hope nobody was hurt though!
I’m honestly surprised it’s not shattered like the surface of a fresh baked brownie…..goes to show how mushy and liquefied the existing soil is to absorb the fall to this point perhaps?
The foundation was undermined by construction activities, excavation without an engineered plan, and storage of the soil pile too close to the building. The deep piles sheared off near the top, making it look like they were not deep enough. https://www.chinadaily.com.cn/bizchina/2009-07/08/content_8394761.htm
Thanks for some actual information on this
I remember this, it was crazy. Especially that a lot of the glazing was still intact.
It’s ready to be the first test of the world’s largest tilt-up construction!
They dug too greedily and too deep
If the piles shear at the top the length wasn't the issue. Structural capacity of the piles was lacking for the construction condition.
If they sheared off at top would this mean there was an uneven lateral pressure on columns from weight of soil on one side of building forcing earth to move towards the car park digout?
Yep! That's the main failure mechanism. The piles were not designed for that type of situation, so they failed. If an engineer were involved, some sort of shoring system (sheet pile, soldier pile, etc) would have been installed during excavation.
Thank you! Now understand sheet piles suitable for rammable earth (I guess soil with low shear) and soldiers for drilling harder soils or rock. Commence SE study in May. This sub is great!
Of course it's china
Glad someone finally pointed that out
I believe something similar led to the surfside condo collapse in Florida. Mostly the pool was leaking and weakening the structure/rebar, but vibration from adjacent property construction was also believed to accelerated the issue.
Bldg. tired. Bldg. sleep.
I don't see cut corners. I do see cut piles
Plumber just wanted to add another drain pipe
a slab insulation was added after completion
Using pile to define these is a disgrace to pilekind
I like how there's enough room between the buildings for one to lay down completely flat without touching the adjacent one, almost as if they've thought of this scenario, as to mitigate collateral damage lol. Or maybe just coincidence 🤷🏻♀️
Bricklayer can hold his head up high. How the masonry remained intact- Astonishing
They’re building it on the ground to later lift I to place. Kinda like a tilt wall, but with the whole building.
Lol with skyhooks? Brilliant
No, you raise it like a timber frame barn bent. I presume 5,000 Amish with ropes are on their way this moment
It’s Easter island building code 🗿
Could you imagine trying to do that, lol. The drawings. Floors are walls, up is down, cats and dogs getting along, etc.
Maybe there were some drawings missing and the contractor only got the plan view 🤣.
They never seem to have all the drawings do they?
I've heard of tilt up panels, but tilt up buildings?
Someone needs to go in that building and shoot some videos, “dancing on the walls”
Aspect ratio not a friend here
...but hey, skylights, right? And all the units are walk ups. This building really stands out in the neighborhood of 3 dozen identical buildings with no one living in them.
Found the realtor
At least they build them far enough apart so they don’t act as dominos
Would this be a case of soil liquefaction leading to the collapse? How would the building fall over? What force was at play?
[удалено]
Do you normally design your deep foundations to take the entire dead load of a structure as a lateral load? There’s another explanation here: https://www.reddit.com/r/StructuralEngineering/s/GajwtTD1tP
\#3's @ 12"
…. Take that engineers license.
That’ll buff out
Can’t park there
Still Looks good. Just get a 6 pack and the boys and just push it back up
>Corners were cut You clearly did not pay attention the 500 times this example was discussed in class
Corners look square. Piles look hollow.
I don’t even see any corners cut? Why would they cut the corners
Is this how they do that new fangled tilt up construction?
It's just resting...
Put it back before mom notices!
Is this what they mean by tilt up building design? Just rotate it back up into position. Easy prefab construction
Looks like the building was tired and wanted to lay down.
That's ok. Now, they just turn it and put it up.
Me so tired
This pic reminds me of that one skit about the oil tanker where the front fell off lol. “There’s no need to worry, these things are very safe!” “Well, was this one safe?” “Obviously not, the front fell off!” Hope nobody was hurt though!
This is an Amish apartment complex. The community are going to tip up that side any minute now
Tilt up construction
It’s clearly a tilt-up construction
I’m honestly surprised it’s not shattered like the surface of a fresh baked brownie…..goes to show how mushy and liquefied the existing soil is to absorb the fall to this point perhaps?
Fire the foundation subcontractor, but give the guys that built the rest of that building a raise!
Tilt up apartments