This is what happens when there’s not enough reinforcing steel in a concrete assembly:
First, the apartment building was constructed. Afterward, the plan called for an underground garage to be dug out. The excavated soil was piled up on the other side of the building. Heavy rains resulted in water seeping into the ground. The building began to tilt. Then it began to shift and the “hollow” concrete pilings were snapped due to the uneven lateral pressures and lack of tensile strength from rebar or even welded wire fabric.
• An underground garage was being dug on the south side, to a depth of 15 feet.
• The excavated dirt was being piled up on the north side, to a height of 35 feet.
• The building experienced uneven lateral pressure from south and north.
• This resulted in a lateral pressure of 3,000 tons, which was greater than what the pilings could tolerate.