Quote:
Originally Posted by Fvn
They need to be careful with the installation of their earth retention system. idk how close the line is but if its close they would probably need to use cased secant piles but diaphragm wall would also work. At Echelon Seaport (in Boston) they had a train line split the site in 2 and they had to do soil mixing along the tunnel to stabilize the ground before they could install the diaphragm wall. If its top down I don't think they actually need to use bracing/tiebacks (tiebacks are out of question with adjacent tunnels anyways) because once they build a floor it holds the wall up
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Well, that part of the tower and podium are set back from State street, so I wouldn't be surprised if the throw-in pocket park/plaza was made with this issue in mind. Gives them the space needed to avoid worrying about the subway and therefore spending extra money.