DMRC begins construction of underground section of Phase 4

NEW DELHI: The Delhi Metro Rail Corporation (DMRC), on Friday, July 17, initiated construction work of the underground section of Phase 4 on the 28.92 kilometre(km)-long Janakpuri West-RK Ashram Marg corridor. This corridor is an extension of Delhi Metro’s Magenta Line which consists of 7.74 km-long underground lines and will come up with 22 stations. The construction work on this particular section started in December last year.

As part of the work, construction of the D Wall as well as the casting of tunnel segments of the 28.92 km long corridor was formally started. The work has begun for the construction of D wall at the Krishna Park Extension metro station and the tunnel segments will be used for tunneling with Tunnel Boring Machines (TBM) on a 1.4 km stretch between Janakpuri West and Keshopur. According to a DMRC release, this approximately 2km-long stretch will also have the Krishna Park Extension station in between along with a 365-metre cut and cover open ramp near Keshopur that will lead to the elevated section.

At the state-of-the-art casting yard developed at Mundka, the tunnel segments are being cast and 2,100 rings for the tunneling work will be made by the casting yard. According to DMRC, this work received an award in December last year on Engineering, Procurement and Construction (EPC) basis. The goal was achieved in time amid all constraints such as a shortening of labor and materials due to lockdown. On June 24, the casting work on the same corridor of the u-girders was initiated.

Phase Four includes the construction of 61,679 kilometers of new metro lines across three separate corridors consisting of 45 metro stations. The new sections would have interconnectivity between Delhi Metro’s already operational sections and out of this, 22.35km will be underground.