TBM S-1259 Starts Tunneling for Bangalore Metro’s Pink Line

Afcons Infrastructure on Friday commissioned their second tunnel boring machine, S-1259, at Dairy Circle Ramp to build Bangalore Metro’s 21.386 km Pink Line (Reach 6) which will connect Nagawara – Kalena Agrahara via 18 stations.

This slurry machine for the 73.92 km Bangalore Metro Phase 2 project was manufactured by Herrenknecht in Guangzhou, China and arrived onsite in Bengaluru in December 2020.

In March, Afcons team started lowering its parts into the ramp’s TBM launch shaft area for constructing twin tunnels for the Pink Line’s 3.655 km Package RT-01 (Rashtriya Military School Station – Dairy Circle Ramp).

Per the tunneling plan, S-1259 will build 3 tunnels totaling 2075.306 meters for the north-bound tunnel from Dairy Circle Ramp to Langford Town Station:

1. Dairy Circle Ramp to Dairy Circle Station: 613.458 meters (estimate of 260 days)
2. Dairy Circle Station to Lakkasandra Station (formerly Mico Industries): 747.338 meters (estimate of 243 days)
3. Lakkasandra Station to Langford Town Station: 714.510 meters (estimate of 157 days)

Here are some snaps via Srivas Rajagopalan at BMRCL’s PR team:

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. With this development – 6 of those have been commissioned.

Here’s a status of each with figures displayed from BMRCL’s March newsletter. Whenever the April newsletter is out (its timing is erratic), I’ll update this table.

For more updates, check out my Home Page!

– TMRG

Hat-tip: Christin Matthew Philip