I found one of the paper that describes the building collapse during construction. The collapse is due to the soil and foundation unstability problem that was induced by the transported soil from the excavation work.
To illustrate more details, I below describe this collapse situation.
The building collapse occured on June 27, 2009. The building is a 13-story building under construction in Shanghai, China. The collapse was due to rotating/overturning and falling on its side. This illustrates in the picture (A) below.
Picture (A)
Site Conditions before the collapse of the building - Prior to the collapse of the building, the buildings were supported by hollow concrete piles illustrated in the figure (B) below.
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| Picture (B) |
During the constrution, an excavation on the south side of the collapsed building was ongoing for an under ground garage. The excavation for the garage was dug to a depth of 15 ft (4.572 m.)
The excavated soil then was stockpiled on the north side of the collapsed building to a height of 33 ft (10.058m.) above the existing ground elevation as illustrated in figure (C).
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| Picture (C) |
At this point, I believe that you might be able to guess what the cause of the collapse of the building... Please share your idea by posting your comments and I later give you some of my thought and investigation. :)
if a collapse will be,types of collapses are wanted,therefore chineses make a good job of collapse types,however why could it happened?There are any earthquake,according to me excavation and ground depth of buildings was not enough?left side excavation dislocated build ground?
ReplyDeletein my point of view, i think it is mainly due to loading problem near the foundation ( one is very less and the other side rises to some extent ) and also the excavation should not be done near the footing, it may lead to settlement problem. one more reason should be due to the vibration of the machine!
ReplyDeleteMaybe there a problem on excavating the area and thats why the footing were affected.
ReplyDeletegreat post.really helpful for me
ReplyDeleteI thnk it happens because of uneven loading condition occurred due to load of stockpit on north and lack of support on south due to excavation.
ReplyDeletein the picture (A), is it human error's or design scheme's are wrong?
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ReplyDeletecivil engineer have to find the problems behind building collapse.
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what is reason behind this incidence ?. I think material used for built a building should be fake..not pure.
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Thanks, to expressing excellent information. Civil engineering is a more exciting field. The builders don't take priority to safe work processes, so that's the one issue of collapse the buildings. I think, Chinese builders are making a excellent building because these buildings has not collapsed any earthquake. There's building has very strong. I think, other countries peoples are not using pure material to construction. Research Reports
ReplyDeleteIt might be due to the increase and decrease of the lateral pressure. At the time of design, it might have been considered to be at its equilibrium condition but after the excavation of the soil and putting it on the other side of the ground, the active pressure on the side of the filling increases which inturn causes the increase of active pressure on that side as well as decrease of passive pressure on the other side which inturn can be the cause of overturning failure.
ReplyDeleteIn the picture it is shown that, no protection wall is provided during excavation, so this cause easy loosening of soil from foundation to south way,and the loosening get increased while unloading the excavated soil on north side.The pressure goes on increased & soil slides down towards south way from footings.
ReplyDeleteI think, retaining wall could have been save this collapse that time.
The first point is clear that there were excavation were going on along the construction site, and I heard that there is dug specially in China at after 20m of every places, So first the engineering should have clear knowledge about their climate. It's really a big site destruction.
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I think this is due to variation in effective pressue becouse of excavation it affect the foundation soil & building collapsed
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