Two TBM Breakthroughs at Delhi Metro DC-07 Project in June
In early June 2025 two 6.65 m diameter Earth Pressure Balance TBMs finished their excavation work on India’s Delhi Metro Phase IV DC‑07 package, achieving a seamless drive from Airforce Station to Tughlakabad Railway Colony Station via Maa Anandmayee Marg Station. This accomplishment marks another chapter in Robbins’ long-standing partnership with owner Delhi Metro Rail Corporation (DMRC) and contractor Afcons Infrastructure Limited.
Tunnelling Through Densely Populated Urban Areas
The twin TBM drives totaled 2469 rings, spanning a combined 3456.6 m of tunnel. Drive 1 totaled 2651.6 m between Airforce Station and Maa Anandmayee Marg, while Drive 2 totaled 791 m between Maa Anandmayee Marg and Tughlakabad Railway Colony.
The drives passed through densely populated urban sectors with difficult logistics and challenging mixed-ground geology consisting of rock with gravel, sand, silt and clay – all with minimal surface impact.
“The performance of the PLC systems throughout the DC-07 drives was exceptional, ensuring real-time control and precision even in highly variable ground conditions,” said Laxman Khatri, PLC Expert, Robbins India. Despite complex logistics and mixed ground conditions, both drives were completed on schedule. With the tunneling phase for DC-07 now completed, Robbins will continue to assist Afcons Infrastructure Limited during TBM dismantling and removal from the tunnels.
