GENERAL CIVIL MAINTENANCE WORK FOR UNDERGROUND METRO STATIONS FROM APPAREL PARK STATION RAMP TO SHAHPUR METRO STATION UPTO OLD HIGHCOURT STATION TRANSITION SPAN, INCLUDING UNDER TUNNEL SECTION & FOUR (04) METRO STATION NAMELY (KANKARIA STATION, KALUPUR RAILWAY STATION, GHEEKANTA STATION, & SHAHPUR STATION) OF AHMEDABAD METRO RAIL PROJECT PHASE-1