CRCHI Urja Becomes First TBM to Complete Tunnelling in Phase-2 of Bangalore MetroTBM assembly at site
On 22nd September 2021, hard rock/slurry TBM Urja (DZ670) manufactured by China Railway Construction Heavy Industry Cooperation Limited (CRCHI) achieved a breakthrough from the Cantonment Station to the Shivaj Nagar Station among the 9 TBMs in Phase-2 of Metro project in Bangalore, India.

It is acknowledged that the Bangalore metro project with frequent stratum variations is one of the most challenging metro construction projects which uses the TBM method. The total length of the section is 855 meters, among which, 250 meters surrounding rock strength is up to 200 MPa of full section hard rock, 350 meters compound stratum with a large number of boulders, hard bottom and soft top, and 255 meters consisted of sand or backfill stratum.

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