Tunnel boring machine (TBM) S-1264B has achieved the first breakthrough at Tughlakabad Railway Colony station for package DC-07 under the Delhi Metro Phase IV Project. It was commissioned at Tughlakabad station in November 2024 and travelled for 959 metres to build a tunnel towards Tughlakabad Railway Colony station.
Besides, the new tunnel with 566 rings has been constructed at an average depth of 18 metres.
Package DC-07 involves design and construction of underground up and down tunnels by shield TBM from the end of cut and cover tunnel near Sangam Vihar metro station up to the existing Sarita Vihar depot, underground ramp and cut and cover tunnels near Sangam Vihar and Tughlakabad metro station and underground metro stations at Maa Anandmayee Marg, Tughlakabad Railway Colony and Tughlakabad including retrieval/ launching shafts on the Aerocity-Tughlakabad corridor. The package was awarded to Afcons Infrastructure Limited in January 2022.
The Delhi Metro Phase IV Project involves development of a 112.4 km long metro rail network comprising six corridors with an investment of Rs 468 billion. The three corridors to be developed on a priority basis are Maujpur-Mukundpur (12.31 km), Janakpuri West-RK Ashram (29.26 km) and Aerocity-Tughlakabad (23.62 km). Whereas the other three corridors approved in 2024 by the central government are Inderlok-Indraprastha (12.37 km), Lajpat Nagar-Saket G Block (8.38 km) and Rithala-Narela-Kundli (26.46 km).