Pittsburgh Sinkhole 1

[JAE]

In downtown - nice "cutaway view" of the below-grade utilities.
Link to City of Pittsburgh Twitter - video there of them hoisting out the bus
ENR's short news article on it: Pittsburgh Twitter Link

 

[ATSE]

The photos are actually pretty impressive.
The unreinforced concrete pavement / slab was spanning quite a bit before failing.
Where did all the soil mass go? Infiltration into the sewer via joints?

 

[dgallup]

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[IRstuff]

The soil requires water to move it, so wherever the water went is where the soil followed.

Given the dryness of the manhole structure in the back, the concrete held up for quite a while; who says concrete can't handle tension? ;-)

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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[itsmoked]

I'm kinda amazed a natural gas line didn't cause a BIGger problem.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[3DDave]

Bury the wires they say.

They'll be safe they say.

No chance a bus will come along and hit them they say.

Pittsburgh says - watch this.

Looks like the wire mesh decided it wasn't paid to deal with this anymore.

 

[JAE]

Probably Gremlins or something of that nature....