DESIGN, CONSTRUCTION AND COMPLETION OF UNDERGROUND STATIONS AND TUNNEL INCLUDING FINISHES FROM SURAT RAILWAY STATION TO CHOWK BAZAR RAMP FROM CHAINAGE 7160.6M TO CHAINAGE 10720M, COMPRISING TWIN BORED UNDERGROUND TUNNEL BETWEEN SURAT RAILWAY STATION AND SOUTH RAMP, ALL CUT AND COVER PORTION INCLUDING THREE UNDERGROUND STATIONS VIZ. CHOWK BAZAR, MASKATI HOSPITAL AND SURAT RAILWAY STATION WITH ENTRY/EXITS & CONNECTING SUBWAY BY BOX PUSHING METHOD AND A PORTION OF NATM AND LAUNCHING AND RECEIVING CHAMBERS OF TBM FOR SURAT METRO RAIL PROJECT, PHASE-I