(2) The excavated dirt was being piled up on the north side, to a height of 10 meters
(3) The building experienced uneven lateral pressure from south and north
(4) This resulted in a lateral pressure of 3,000 tonnes, which was greater than what the pilings could tolerate.
Thus the building toppled over in the southerly direction.
The excavated soil was piled up on the other side of the building.
due to the uneven lateral pressures.
The building began to tilt.
They built 13 stories on grade, with no basement, and tied it all down to hollow pilings with no rebar.