KANPUR (Metro Rail News): For tunnel construction of the Chunniganj-Nayaganj underground section, the fourth part of the tunnel boring machine ‘Cutter head’ was brought down in the launching shaft at Bada Chauraha. After unloading into the shaft, it was connected to the ‘front shield’ of the TBM. With this, the four parts of the first TBM have been landed in the launching shaft, where the process of assembling the TBM and the preparations for the initial drive is in full swing. The second TBM in this shaft will also be lowered in the coming days. After this, both the machines will construct the tunnel in the direction of Nayaganj. The UPMRC is trying to start the construction of the tunnel by the end of this month or in the early week of next month.
The ‘cutter head’ plays an important role in the construction of the tunnel. Excavation is possible only by its rotation inside the ground. A 48-ton-weight cutter head was lowered into the launching shaft with the help of modern crawler cranes. Earlier, on June 12 and 13, the ‘MiddleShield’ and ‘Frontshield’ of the TBM were landed under the ground. From June 16 to 18, the ‘tail shield’ of the TBM landed in two parts into a rectangular launching shaft.
A 990-metre tunnel is to be constructed from Bada Chauraha to Phoolbagh-Nayaganj station under Chunniganj-Nayaganj underground section, after which the TBM machine will be removed. After removing both the TBM machines, they will be brought back into the ground from the shaft being constructed at Chunniganj and from Naveen Market to the big intersection via the tunnel.