Namma Metro: Underground tunnel work on Pink Line 95% complete

The Pink Line, spanning 21.26 km and linking Kalena Agrahara to Nagavara, boasts the longest underground stretch in Bengaluru metro, covering 13.76 km, alongside a 7.5-km elevated segment

April 28, 2024 08:42 pm | Updated 09:40 pm IST - Bengaluru

BMRCL officials project that the underground section will be fully prepared by August, while the entire stretch may be opened in 2025. 

BMRCL officials project that the underground section will be fully prepared by August, while the entire stretch may be opened in 2025.  | Photo Credit: K. MURALI KUMAR

The Pink Line of Namma Metro has made significant progress with over 95% of tunnelling completed. Bangalore Metro Rail Corporation Limited (BMRCL) officials project that the underground section will be fully prepared by August, while the entire stretch may be opened in 2025.

The Pink Line, spanning 21.26 km and linking Kalena Agrahara to Nagavara, boasts the longest underground stretch in Bengaluru metro, covering 13.76 km, alongside a 7.5-km elevated segment. This underground portion includes the ambitious task of constructing 20.992 km of twin tunnels. Progress is also underway on the construction of 18 stations, comprising 12 underground and six elevated stations, nearing completion.

BMRCL deployed nine tunnel boring machines (TBMs) for tunnel construction. Seven of them (Urja, Varada, Avni, Lavi, Vindhya, Vamika, and Rudra) have successfully completed their tasks. The eighth TBM, Tunga, began its final drive from KG Halli to Nagavara, spanning 935 metres, on February 2, 2024. The ninth machine, Bhadra, is currently undertaking its last assignment — a 939-metre northbound tunnel from KG Halli to Nagavara. Officials anticipate its completion in the upcoming months.

“In the KG Halli-Nagavara section, the geological composition consists of a combination of weathered rock and sandy silt/clayey sand, facilitating a comparatively smoother tunneling process,” said a senior BMRCL official.

Work on this stretch was delayed for years owing to various reasons, including cancellation of tender as bidders quoted exorbitant prices to build the network, policy decisions to change the alignment before the old alignment was finally approved, and land acquisition, among other hurdles.

0 / 0
Sign in to unlock member-only benefits!
  • Access 10 free stories every month
  • Save stories to read later
  • Access to comment on every story
  • Sign-up/manage your newsletter subscriptions with a single click
  • Get notified by email for early access to discounts & offers on our products
Sign in

Comments

Comments have to be in English, and in full sentences. They cannot be abusive or personal. Please abide by our community guidelines for posting your comments.

We have migrated to a new commenting platform. If you are already a registered user of The Hindu and logged in, you may continue to engage with our articles. If you do not have an account please register and login to post comments. Users can access their older comments by logging into their accounts on Vuukle.