Tunneling Works of Longest Underground Corridor in Bengaluru Begins for Namma Metro

The Bangalore Metro Rail Corporation (BMRCL) has set a tunnel boring machine and announced commencement of tunneling work for the city’s longest underground Metro corridor between Cantonment station and Shivajinagar station in the state of Karnataka.

Chief Minister of Karnataka B S Yediyurappa has set in motion the work by one Tunnel Boring Machine (TBM). Between Cantonment Metro station and Shivajinagar Metro station, the TBM, which has been named Urja will now be tunneling.

The expected geology in this tunnel section is about 250 mtr hard rock, 350 mtr mixed ground conditions, and nearly 255 mtr soil.

The second TBM which has been named Vindhya is likely to be commissioned soon after the required advancement is completed by the first TBM.

The longest underground Metro corridor in the state capital, Bengaluru is planned between Diary Circle and Nagawara Metro stations, spanning across a total distance of 14 km.

BMRCL is planning to extend the city’s Metro line network from KR Puram to Kempegowda International Airport via Hebbal and Nagawara. For this, BMRCL has acquired properties on various stretches of the alignment.

Phase-1 of Namma Metro network consists of two corridors that include the East-West Corridor and North-South Corridor. The East-West Corridor named Purple Line covers a distance of 18.10 km, while the North-South corridor named Green Line covers 24.20 km distance.

Source: Constructionweekdaily