Tunnel boring underway at Saidapet
Posted on: 11/Jun/2013 12:14:22 PM
Saidapet Station�s concrete diaphragm has been bored through by the tunnel boring machine (TBM). The machine has made a tunnel of 250 metres in the seven km stretch between Saidapet and Government Estate.
�The diaphragm wall, usually built on the four sides of the station and within which the station is constructed, is about one metre thick, We are drilling at a speed of about 10-12 metres a day; but this may change and slow down if the soil condition is not favourable. In the tunnelling done so far, there has not been a single crack in the neighbouring buildings owing to the metro work�, said a Chennai Metro Rail Limited (CMRL) official.
