Based on the photos....
A 'bell end' or ta with bushings would be nice on the pvc. I'm guessing there is in fact PVC in the nice new cement patch...not just THHN/THWN.
I see three conductors spliced w/red nuts going to the 'hole' that's under the ring...and what looks like a wht/red going???
Nice water visable in the PVC @ 8 o'clock.
That said, physical damage from vibration? that may be a stretch, although a possibility. By 'eye' in the pic, that may be 2" of concrete.....but where's the PVC?
That looks like a 'non-electrician' did it.
