Bangalore Metro’s TBM Varada Restarts Tunneling to Langford Town

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Tunnel Boring Machine S-1264 operated by Afcons Infrastructure on Thursday was recommissioned at Rashtriya Military School Station for building the down-line tunnel of Bangalore Metro’s 21.386 km Pink Line (Nagawara – Kalena Agrahara).

Nicknamed Varada, this is TBM S-1264’s second and final drive for the 3.655 km Package RT-01 (Rashtriya Military School Station – Dairy Circle Ramp) of the 73.92 km Bangalore Metro Phase 2 project,

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This refurbished Herrenknecht earth pressure balance (EPB) machine was originally commissioned in March 2021 from Rashtriya Military School Station (near Vellara Junction) to build the 596 m up-line tunnel towards Langford Town where it recorded a breakthrough in November 2021. The machine’s parts were then brought back to RMS Station to build the parallel down-line tunnel.

BangaloreMetroMapRT01 Kolkata Metro
RT-01: Dairy Circle Ramp – National Military School- view Bangalore Metro Phase 2 Info & Map

Per the tunneling plan, Afcons hopes to complete tunneling on this section in 235 days.

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Last week TBM Vamika arrived in the middle of Dairy Circle Station after recording a hidden breakthrough at the station box’s southern-end earlier in the month. Here’s a snap of Vamika (S-1260) and TBM Rudra (S-1259) which is undergoing minor refurbishment at the moment.

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In the coming months, both will be recommissioned one after the other towards Lakkasandra Station to build 747.338 meter tunnels which Afcons hopes to complete within 243 days.

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– TMRG

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