Afcons Infrastructure with assistance from Herrenknecht last week completed factory acceptance tests (FAT) on TBM S-1264B for constructing Delhi Metro’s 23.622 km Silver Line which will connect Aerocity – Tughalakabad via 16 stations.
This refurbished Earth Pressure Balance (EPB) machine is the second of four machines to pass FAT for building twin tunnels on the 65.1 km Delhi Metro Phase 4 project’s 6.981 km Package DC-07 between Sangam Vihar Station and Sarita Vihar Depot.
The machine was previously deployed with an Indian-flag themed cutterhead as “TBM Varada” to build tunnels on Bangalore Metro Phase 2 Pink Line’s 3.655 km Package RT-01. Between March 2021 and September 2022, it built 596m long twin tunnels connecting Rashtriya Military School Station and Langford Town Station.
Following its final breakthrough at Langford Town, the machine was dismantled and taken to Afcons’ yard in Butibori, on the outskirts of Nagpur, for storage and refurbishment.
Delhi Metro Rail Corporation (DMRC) had awarded Package DC-07’s Rs. 1669.20 crore contract to Afcons Infrastructure in January 2022 with a 42 month deadline.
Package DC-07 connects Sangam Vihar Station’s east-end and Sarita Vihar Depot via 3 stations at Maa Anandmayee Marg, Tughlakabad Railway Colony, and Tughlakabad where it will form an interchange with the Violet Line’s elevated station built in Delhi Metro’s Phase 2.
As shared above, this is Afcons’ 2nd of 4 machines to pass FAT for this package. They’ll be deploying another Robbins machine (TBM 364) and another refurbished Herrenknecht machine TBM S-711 from Chennai Metro’s Phase 1.
S1264B’s launch location remains unknown to me, but will likely be the Airforce Launch Shaft, just east of Sangam Vihar Station, from where TBM 372 (Amrit) was commissioned in May 2023 towards Maa Anandmayee Marg Station.
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