Kanpur: Under the First Corridor of Kanpur Metro Rail Project (IIT-Kanpur to Naubasta), the first Tunnel Boring Machine (TBM) segment was lowered in the launching shaft constructed at Bada Chauraha. UPMRC is trying to start the construction of the tunnel till the end of this month or in the first week of the next month. The TBM selected for the tunnelling is a state-of-the-art machine designed for the geological condition of Kanpur. The process of lowering of TBM has commenced with lowering of Middle shield weighing120 tonne with the help of 400 tonne and 250 tonne heavy crawler cranes. This shield was placed on the cradle inside the shaft. After this Front shield, Tail shield and Cutter head of the machine will also be lowered inside the rectangular shaft which has a length of about 21 meters, width of about 24 meters and a depth of about 17.5 meters. The casting of precast concrete rings for the tunnel is going on since October 2021.
Two TBM machines will be launched from the launching shaft at Bada Chauraha, which will construct the tunnels in the direction of Nayaganj. TBM shall be retrieved at Phoolbagh-Nayaganj station after building tunnel of 990m. The tunnel between Bada Churaha and Phoolbagh-Nayaganj metro stations shall be completed in approximately six months.