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Requirement :
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Mrts phase ii - extension from velachery to st thomas mount - construction of pile foundation and sub structure - consisting of pile, pile cap pier, pier cap, pedestal, portal framed structure with raft foundation, tie beam, top portal beam, shoring and miscellaneous works between ch. 23235m and ch. 23734m (pier no.159 to 161,163 to 165, 167 to 168, 173,174 - pile foundation and pier no 169,171,175,176 and 177 part - open foundation) and construction of super structure consisting of casting and launching of psc box/i girder over already constructed sub structure (pier no.158,162,166,170,172 & 178) pier cap and portal beam duly providing diaphragm walls, deck slab, kerb slab, foot path slab, median slab, parapet wall and miscellaneous works along the elevated corridor between pier no.157 to ap2(psc box girder span 40m,27m,22.50m,20m,18m,15m and psc i girder span of 33.47m(track span) 22.50mskew (non track span) and 15.267m balance work of reach iv between ch. 23235m and ch. 23734m. (two packet system)
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