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Abstract: Chennai Metro Rail Project is one of the largest public work Projects in India. The construction of Chennai Metro Phase-I started in 2011 and ended in 2015.TTA-Afcons JV got two packages, namely UAA-01 & UAA-05 which comprises of Design and Construction of Underground Stations and associated Tunnels. As per construction schedule, 5 Tunnel Boring Machines have been deployed to bore twin...