I was curious about that - I would imagine projects of this scale would need to put some pretty heavy effort into attempting to have no settling/foundation shifting of the adjacent parcels.Haven't seen bracing like that in shoring in some time! Really hope they can keep the old brick house from cracking more, you can see a big one at the bottom right corner of the top left window, and a brick missing from the top of the window below. That was there before this construction started, but it looks worse now.
I'm pretty sure the shoring contractor legally has to monitor the buildings around the excavation. There's too much liability for it to be unregulated.
I remember when the ugly blue tower across from Central Memorial Park was under construction, a sink hole opened up in the basement of the building next door and another opened up on 2nd street. There is a very high water table in the Beltline with lots of small underground rivers, shoring can disrupt these and cause problems in the area around it.