TBM Bhadra of the Bangalore Metro Achieves Breakthrough at K.G Halli 

With this breakthrough, the bangalore metro has achieved 91% work completion.

TBM Bhadra of the Bangalore Metro Achieves Breakthrough at K.G Halli
TBM Bhadra of the Bangalore Metro Achieves Breakthrough at K.G Halli

BANGALORE (Metro Rail News): TBM S-840B or TBM Bhadra of the bangalore metro achieved a breakthrough today. It’s been deployed on the Bangalore Metro’s 21.386 km long Pink Line. 


It has built an 1184 m long northward tunnel from Venkatsehpura to K.G Halli. It has bored at an average rate of 3.3m/ day through hard topographic terrain. It took the TBM  approximately a year or less to construct an 1184 m tunnel on the Pink Line of the bangalore metro running from  Kalena Agrahara to Nagawara.


The TBM was commissioned from Venkateshpura Station Southward to Tannery Road in June 2021. Later, it was launched on the  Venkateshpura-K.G Halli Road on February 16, 2023, at the  Venkateshpura underground station. 

Assignments completed by the TBM 

Total assignments completed by the TBM  with dates are as follows: 

  1. Venkateshpura to Tannery Road (822m): June 2021 – July 2022
  2. Tannery Road to Shadi Mahal TBM Retrieval Shaft (222m): July 2022 – December 2022
  3. Venkateshpura to Kadugondanahalli (1184m): February 2023 – February 2024

Next assignment 

Following this progress, Bhadra will be transported across Kadugondanahalli Station’s enclosure, expected to last between 20 and 45 days. It will commence its fourth and final phase, covering approximately 935 meters towards the southern cut & cover section 1 of Nagawara Station.

Update on Tunnel of the Pink Line 

With this breakthrough, the bangalore metro has achieved a total tunnel construction of length 19,120.70 meters out of a total of 20,992 metres on the 21.26 km long Bangalore Metro’s Pink Line. It can account for approximately 91% of the total work. 

BMRCL aims to complete the tunnelling work on the line by the end of August 2024. 

Pink Line: Kalena Agaraha (formerly Gottigere) – Nagawara

Total Length: 21.386 km (Elevated +  Underground ) 

Covering Stations: 18

Kalena Agrahara (formerly Gottigere), Hulimavu, IIM-Bangalore, JP Nagar 4th Phase, Jayadeva Hospital, Swagath Road Cross, Dairy Circle, Lakkasandra (formerly Mico Industries), Langford Town, Rashtriya Military School (formerly Vellara Road), MG Road, Shivaji Nagar, Cantonment, Pottery Town, Tannery Road, Venkateshpura, Kadugundanahalli (formerly Arabic College) and Nagawara

Status: Under Construction

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