Delhi Metro Phase IV’s first tunnel boring machine being lowered

New Delhi, Oct 22 : The lowering work of the first-ever Tunnel Boring Machine (TBM) of Delhi Metro’s Phase IV has been started at Vikaspuri on the Janakpuri West-RK Ashram Marg corridor, a Metro official said.
As part of this tunnelling drive, two tunnels, for up and down movement, of a length of 1.4 km will be bored between Vikaspuri and Krishna Park Extension.
“The tunnelling work with the TBM is expected to start next month, after the lowering and assembling of the giant 73-metre-long machine is completed. These tunnels will be located between the Janakpuri West and Krishna Park Extension stations of the corridor,” said Anuj Dayal, Executive Director of DMRC’s Corporate Communications.
“The tunnelling will start from Vikaspuri area in continuation of the Magenta line tunnel that has been already constructed for the presently operational Botanical Garden-Janakpuri West corridor.” The tunnel will be constructed approximately at a depth of 14 to 16 metres, and around 2,040 concrete rings will be installed in them. Each tunnel will have an inner diameter of 5.8 metres.
The entire tunnelling work on this stretch is expected to be completed in about 15 months’ time. The alignment of the tunnel will be along the Outer Ring Road.