The Urja tunnel boring machine nears the end of its work


He started working in Cantonment and is expected to move out to Shivajinagar in a few days.

In July 2020, as Bengaluru faced the pandemic, the tunnel boring machine (TBM), Urja, began its underground journey from Cantonment. After more than a year, he has almost finished digging the tunnel on the 850-meter stretch and will make a breakthrough at Shivajinagar in three to four days.

Urja, will be the first tunnel boring machine to make a breakthrough on the pink line of the Namma metro from Kalenga Agrahara to Nagawara (21 km). The machine is only 10-12 meters from the breakthrough point.

Anjum Parwez, Managing Director of Bangalore Metro Rail Corporation Ltd (BMRCL), said The Hindu that the breakthrough tunnel boring machine is an important development in the ongoing tunnel works for phase II of the Namma metro. “Our engineers have told me that the tunnel boring machine is progressing well and will come out at the Shivajinagar subway station in a few days.”

Urja is around 102 meters long and costs 70 crore. In the same direction, another machine, Vindhya, builds a parallel tunnel, just 70 to 100 meters from Urja.

For the underground section of the pink line, BMRCL has to dig nearly 14 km from Dairy Circle in Nagawara. To carry out this work, nine tunnel boring machines will be deployed. “Seven machines are already in service,” said BMRCL PRO BL leader Yeshwanth Chavan.

Tunneling is hard work as machines dig under densely populated areas and hundreds of buildings on the surface. In August, due to tunnel work, slurry had gushed out inside the houses opposite the government school VKO. The BMRCL had to evacuate the residents of the affected buildings.

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