Main Question or Discussion Point
Would the engineers comment on the safety of this construction, in particular drilling through the concrete support structure
You should contact the Civil (or Mechanical) Engineering Departments of your local university (or the one that's closest to you), and not be looking for advice on the internet (especially if you don't have a background in structural engineering). For the record, I am also not a civil (and especially, structural) engineer.This subject came up on thaivisa, a discussion forum in Thailand, in the Pattaya section.
The pillars are under a very massive newly constructed 6 level + mall in this seaside town.
Some members on the above forum recently felt tremers and shaking while inside the new mall. Another member observed and took photos of these after construction braces.
There is no communication between the members on the forum and the Thai construction company that did the work.
The concern by the forum members is the danger of the mall collapsing.
Since this could be very serious im trying to research it as fast as possibe.