Afcons Begins Lowering Bangalore Metro’s TBM S1264 at RMS


Workers from Afcons Infrastructure on Thursday night began lowering parts of tunnel boring machine S-1264 at a shaft adjacent to the Rashtriya Military School Station (near Vellara Junction) on Bangalore Metro’s 21.386 km Pink Line (Reach 6) which will connect Nagawara – Kalena Agrahara through 18 stations.

This earth pressure balance (EPB) machine is the first of 3 Herrenknecht machines which will be deployed by Afcons for constructing twin tunnels on the 3.655 km Package RT-03 (Rashtriya Military School Station – Dairy Circle Ramp) of the 73.92 km Bangalore Metro Phase 2 project.

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

The machine passed factory acceptance tests (FAT) in November 2020 at Herrenknecht’s Indian plant at Alinjiwakkam, Tamil Nadu (view images with Indian-flag themed cutterhead) and arrived in Bengaluru in early January.

Per the tunneling plan, it will build both twin tunnels between Rashtriya Military School Station and Langford Town Station – a one-way distance of 596 meters which Afcons hopes to accomplish in 235 days. From Langford Town Station, the machine will excavate back northwards.

Afcons Begins Lowering Bangalore Metro’s TBM S1264 at RMS
One of S-1264’s shields getting lowered using a rolling gantry crane – Photo Copyright: New Indian Express

A total of 9 TBMs will be deployed by Afcons (3), Larsen & Toubro (4) and ITD Cementation (2) for constructing the city’s Pink Line. Here’s a status with figures displayed from BMRCL’s December 2020 newsletter. The upcoming January newsletter should give a more current status of tunneling progress.

Today’s snap of TBM Avni and the tunnel it built

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