Afcons’ Delhi Metro TBM Tejas Records Breakthrough at Maa Anandmayee Marg
Afcons Infrastructure today celebrated Tunnel Boring Machine (TBM) Tejas’ first breakthrough at Maa Anandmayee Marg Station of Delhi Metro’s 23.622 km Golden Line (Line-10) which will connect Aerocity – Tughalakabad via 16 stations.
TBM Tejas (S-711) is a refurbished Herrenknecht Earth Pressure Balance (EPB) machine that previously saw action in Chennai Metro’s Phase 1 project between 2014-2018.
In November 2023, it became Afcons’ second TBM to start tunneling works for the 112.32 km km Delhi Metro Phase 4 project’s 6.981 km Package DC-07 connecting Sangam Vihar Station and Sarita Vihar Depot.
The machine was commissioned to build the down-line from Airforce Launch Shaft, located just east of Sangam Vihar Station, and travelled a distance of 2.674 km to arrive Maa Anandmayee Marg Station in 14 months achieving an average excavation rate of 191m per month through mixed soil and hard rock strata.
Delhi Metro Rail Corporation had awarded Afcons Infrastructure with Package DC-07’s Rs. 1669.20 crore contract in January 2022 with a 42 month deadline.
Afcons’ 6.981 km 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 station built in Phase 2.
Tunneling for the parallel up-line tunnel was completed by TBM Amrit (Robbins 372) in December 2024.
Both TBMs Amrit and Tejas will now be deployed to build twin tunnels between Maa Anandmayee Marg and Tughlakabad Railway Colony which I estimate to be 810m long.
I also hear Afcons recently completed casting all tunnel ring segments, roughly ~8300 or so, for Package DC-07 at their Mundka casting yard. I’ll likely cover that in a separate post as more information becomes available.
With today’s development, a total of 6 tunnel breakthroughs have been recorded so far for the Golden Line. From east to west: 2 by Afcons for Package DC-07, 4 by L&T for Package DC-09, and 0 by J Kumar on Package DC-08.
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– TMRG
Finally Golden line is in full pace of construction now! BTW has afcons deployed their 4th TBM for DC07? As they were told to deploy minimum 4 TBMs
Not sure. I do know the 3rd machine (TBM Disha) was commissioned in November.
DMRC mandated 5 machines but they’re going with 4.
Oh ok thanks for the info! 👍 Btw do you have the status of RK ashram – Pulbangash section tunnelling? Will they use TBM in this section or some other technology will be used to bore that section.