07-01-2009, 04:01 PM
If the structure rotated about a point, then it is design issue regarding pile foundation as that will mean local failure of piles and so there was rotation. If the structure footprint shifted, that means there was small side movement before collapse, then I think it would be excavation well below pile cap, with lateral forces shearing piles and then collapse. That is my guessing from the pictures.
Thanks
Thanks