Bangalore (Metro Rail News):On 4 September, ITD Cementation India’s TBM Tunga (S-839B) achieved its 4th and final breakthrough at Nagawara Station of the 21.386 km long Pink Line of Bangalore Metro Phase 2 project.
In the first week of February, ITD Cementation deployed TBM S-839B, nicknamed Tunga, from Kadugondanahalli (K.G. Halli) station for its final assignment. After constructing 938 meters TBM achieved breakthrough at Nagawara station’s South Cut and Cover Shaft.
According to BMRCL officials “With this breakthrough, out of the total 20,992 meters of tunneling, 20,582.7 meters (98%) is completed,”
With this milestone, eight of the nine Tunnel Boring Machines (TBMs): Urja, Varada, Avni, Lavi, Vindhya, Vamika, Rudra, and Tunga—have completed their tasks.
TBM Tunga’s Assignment on Bangalore Metro’s Pink Line
| Venkateshpura – Tannery Road | 822m | June 2021 – June 2022 |
| Tannery Road to Shadi Mahal TBM Retrieval Shaft | 209m | June 2022 – August 2022 |
| Venkateshpura to Kadugondanahalli | 1184m | October 2022 – December 2023 |
| Kadugondanahalli to Nagawara South Shaft | 938 m | February 2024 – September 2024 |
Package RT-04
In November, ITD Cementation grabbed Package RT-04 at a cost of Rs. 1771.25, which spans 4.591 km connecting Tannery Road to North Ramp with a 42-month deadline.
The scope of work under this package incorporates the construction of twin tunnels from Tannery Road to North Ramp, Ramp at Nagawara and four stations at;
- Tannery Road
- Venkateshpura
- Kadugundanahalli
- Nagawara.
Upcoming Development
Till date, 25 breakthroughs have been achieved out of 26 breakthroughs planned for the Bangalore Metro Phase 2 project.
Now, only one breakthrough is left by the ninth TBM, Bhadra, which is currently constructing an approx 939-meter downline tunnel between K. G. Halli and Nagawara for the Bangalore Metro Phase 2 project.
