Delhi (Metro Rail News): A major milestone has been achieved for Delhi Metro’s Phase 4 as Afcon Infrastructure’s TBM Amrit (372) recorded a breakthrough at Maa Anandmayee Marg Station of Golden Line spanning 23.622 Km from Aerocity to Tugalakabad through 16 stations for Package DC-07.
This achievement marks a total of 5 breakthroughs for the Golden Line of Delhi Metro Phase 4.
TBM 372
TBM-372, nicknamed TBM Amrit, is a 105 m-long refurbished Robbins Earth Pressure Balance (EPB) machine. TBM Amrit is the first TBM deployed for the Delhi Metro Phase 4 under Package DC-07. The new tunnel has been constructed at an average depth of approximately 16 meters, with around 1,894 rings installed, each with an inner diameter of 5.8 meters. The breakthrough on the other parallel tunnel is expected in January 2025.
For its first assignment, TBM Amrit started tunnelling work from the Air Force Launch Shaft and constructed a 2.65 km and arrived at Maa Anandmayee Marg Station after 1.5 years (18 months) marking the longest tunnel drive in the entire Phase 4 of Delhi Metro.
Package DC-07
In January 2022, Afcon grabbed Package DC-07 from Delhi Metro Rail Corporation at an estimated cost of Rs. 1669.20 crore with a 42 months deadline.
Afcons’ Scope of Work for Package DC-07
Afcons Infrastructure Ltd, under Package DC-07, is responsible for the design and construction of underground twin tunnels starting from Sangam Vihar Metro Station and extending up to the existing Sarita Vihar Depot. Additionally, the contract involves the development of 3 underground metro stations at:
- Maa Anandmayee Marg
- Tughlakabad Railway Colony
- Tughlakabad
The contractor is also responsible for the construction of the retrieval and launching shaft.
