Factory Tests Completed on ITD’s Bangalore Metro TBMs
Tunnel boring machine (TBM) manufacturer Herrenknecht India on Friday wrapped up factory acceptance tests (FAT) on two refurbished TBMs which will be deployed to build a section of Bangalore Metro’s 21.386 km Pink Line (Reach 6).
The 3 day tests took place at Herrenknecht’s yard in Alinjiwakkam, just north of Chennai, and was attended by officials and engineers from ITD Cementation India Ltd. and Bangalore Metro Rail Corporation Ltd. (BMRCL).
TBMs S-839B (nicknamed Tunga) and S-840B (presumably nicknamed Bhadra) are planned to be commissioned in Q3 2021 to build four tunnels each for the Phase 2 project’s 4.591 km underground package RT-04 (Tannery Road – North Ramp) in north Bengaluru.
ITD’s scope of work involves building a combined total of 6.34 km twin tunnels, roughly 360 meter ramp at Nagawara, and four stations at Tannery Road, Venkateshpura, Kadugundanahalli (formerly Arabic College) and Nagawara.
The first look of these mixed shield earth pressure balance (EPB) machines was revealed earlier this month. Both are slated to arrive in the city by April when Venkateshpura Station’s TBM launch shaft gets ready.
Per the tunneling plan, both will first travel 822.99m south from Venkateshpura to Tannery Road, pass through the station box and tunnel 209.585m towards the retrieval shaft. After that, they will be brought back to Venkateshpura for tunneling 1172.16m towards Kadugundanahalli and a further 916.709m to Nagawara Station’s TBM retrieval shaft.
February 1 Update: TBM S-840B has been confirmed as Bhadra. Some images:
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– TMRG
The purple part looks like dark chocolate 😋 Good luck to the team
I can confirm 2nd machine is Bhadra
Good to know – thanks!
Why can’t BHEL or BEML build such TBM at their factory,,
Back yard plant is not a medicine ☹️
That’s a good and valid question
Considering all lines of Namma Bengaluru Metro, how many TBMs will be commissioned across the city?
Afcons – 3 (1 PKG, 3.655Km)
L&T – 4 (2 PKG, 5.639Km)
iTD – 2 (1 PKG, 4.591Km)
Total 9 TBMs
When will the Bangalore metro purple line extension from Mysore Road to kangeri start?
Looking at a Q3 2021 opening right now
Hello,is there any plan for the metro to be extended from silk institute to art of living ashram ?
Nope – none of the plans published so far have mentioned doing that.
Phase 3 is still up in the air. Things could change by the time its DPR is finalized – maybe sometime in 2024?
Any TBMs are manufactured in India? Exemption on Import of TBM scrapped. If domestic TBMs are not available, expect cost of construction of underground Metros to increase.
Manufacturing is non-existent. Even if developed, it will be quite some time before contractors begin purchasing.
When will metro start running on silk board electronic city route?
My thoughts are here:
https://themetrorailguy.com/2021/01/25/bangalore-metros-rv-road-interchange-starts-taking-shape/