Author: angela627

Shanghai ground cracking under the weight of its skyscrapers [Copy link] 中文

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Post time 2012-2-27 12:48:21 |Display all floors
Not suprised at all.

The whole of Shanghai is built on a silt bed, deposited over hundreds of years. How far down do you need to drive piles in before hitting "bed-rock"?

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Post time 2012-2-27 15:34:28 |Display all floors
RealMadrid1 Post time: 2012-2-27 12:48
Not suprised at all.

The whole of Shanghai is built on a silt bed, deposited over hundreds of years ...

The City planners and civil engineers building shanghai consider it unneccessary to hit faraway bed-rock.
since concrete is considered "poured rock-hard stone", concrete beds are pumped into the ground as "artificial bed-rock substitutes" for the buildings to rest on.
Apparantly works out just flawless and perfectly, they gotta be Geniuses, aren't they?
您买象牙 - 您杀了大象!
http://v.youku.com/v_show/id_XNjU1Nzg0NDky.html - “用现代文明标准比划中国人,是严重的种族歧视行为。”
„Ich ficke wo, wen, und wann ich will, hast du mich verstanden. Auch du könntest ficken, aber du kannst es ja gar nicht, deine deutsche Genauigkeit... verbietet es dir“. Jean-Claude Juncker

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Post time 2012-2-27 20:32:24 |Display all floors
LCSULLA Post time: 2012-2-27 15:34
The City planners and civil engineers building shanghai consider it unneccessary to hit faraway be ...

Don't worry, the sinking feeling will stabilize.
Soil consolidation take the shape of an inverse exponetial curve, in the  subsidence v time  graph.

Chinese ground engineers ain't stoopid!

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Post time 2012-2-27 20:37:25 |Display all floors
Madras.pinto Post time: 2012-2-27 20:32
Don't worry, the sinking feeling will stabilize.
Soil consolidation take the shape of an inverse e ...

Is it the same as building on Bed-rock, yes or no?
您买象牙 - 您杀了大象!
http://v.youku.com/v_show/id_XNjU1Nzg0NDky.html - “用现代文明标准比划中国人,是严重的种族歧视行为。”
„Ich ficke wo, wen, und wann ich will, hast du mich verstanden. Auch du könntest ficken, aber du kannst es ja gar nicht, deine deutsche Genauigkeit... verbietet es dir“. Jean-Claude Juncker

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Post time 2012-2-27 20:41:53 |Display all floors
Not all buildings can be founded on solid bases.
Pilings can be used for clay or sandy soil.
The coesive friction on the rake piles takes up the load.

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Post time 2012-2-28 02:54:25 |Display all floors
This post was edited by RealMadrid1 at 2012-2-28 04:14

Ahh, yes, that very same wonderful "solid" concrete that was used in the bridge pylons for the high-speed rail lines and collapsed bridges - reinforced with polystyrene foam and household rubbish.....

It has nothing at all to do with the quality, skill or knowledge of the engineers - it is the lame-brained idiots who call themselves politicians who make ridiculous committments on behalf of the people managing the job, putting pressure to finish by a certain deadline, cut costs, use less materials, etc, etc..... The end result is often tragic, and very rarely do those who apply the pressure to save "face" because of a rash, idiotic committment to the higher level, face any form of prosecution or discipline, just a grand promotion because they met an unreachable target.

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