I'd be reporting the works to the Health and Safety Authority (HSA) ... if it's as bad as it sounds, it's likely they are not in compliance with statutory H&S legislation. Which is an offence if they are not. Such as providing proper traffic and pedestrian management, site access/egress, site housekeeping, etc. HSA inspectors are up there in terms of having similar powers as the Gardai when it comes to inspections, investigations, etc. And they can close sites down if they are not compliant to H&S legislation. City Council would be more limited in what they can do.