Sinkhole suddenly appears behind man - GIF

Sinkhole suddenly appears behind man.

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Previously:

https://www.homemadetools.net/forum/...397#post131485
https://www.homemadetools.net/forum/...237#post221845
https://www.homemadetools.net/forum/...271#post221979
https://www.homemadetools.net/forum/...191#post188184
https://www.homemadetools.net/forum/...242#post192048

What's with the tiny chairs...

Quote:

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Originally Posted by IntheGroove

What's with the tiny chairs...

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Also note the knee-high tables. I suspect it is a classroom for young children. Judging by the stacks of pipes and the tools on the floor the men are probably construction team

Quote:

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Originally Posted by IntheGroove

What's with the tiny chairs...

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Those are normal sized chairs and the people are all giants. That's why the floor collapsed.

Seriously though, what's with the floor? Is this a tofu dreg building? I'm really struggling to understand just how that particular kind of failure even happened. Did they lay tile directly on compacted dirt?

Quote:

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Originally Posted by nova_robotics

Those are normal sized chairs and the people are all giants. That's why the floor collapsed.

Seriously though, what's with the floor? Is this a tofu dreg building? I'm really struggling to understand just how that particular kind of failure even happened. Did they lay tile directly on compacted dirt?

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If you look carefully at the right hand side of the hole you see a concrete space and tile layer. It is common to have a concrete layer then a thick grout layer in China to lay tile onto. If there is de-lamination as is evident there is something happening underneath this to wash out the subsurface. It can and does happen even here. A really quick thinking guy there. And he did whack himself quite hard. He'll feel that later for sure.

Mark

I thought it might be a grade school next door to a Taco Bell where the workers had lunch.....Gas Explosion...

Never let go of his phone, either; good save!

Lack of soil test before building construction.