Tunneling Drive For Delhi Metro’s Janakpuri West-R K Ashram Marg Corridor Started

The Delhi Metro Rail Corporation (DMRC) started the first tunnelling drive for Delhi Metro Phase IV on the Janakpuri West – R K Ashram Marg corridor. A tunnel boring machine (TBM) of the phase began the drive to bore a 1.4 kilometre long tunnel from Vikaspuri to Krishna Park Extension area. Two parallel circular tunnels for the upwards and downwards movement will be constructed on the stretch, which is a part of the 2.2 kilometre long underground section from Janakpuri West to Keshopur. The lowering and assembling process of this giant 73 metre long machine was started in October 2020, according to Delhi Metro Rail Corporation.

The tunnelling started from the Vikaspuri area in continuation of the Delhi Metro Magenta line tunnel that has been already constructed for the presently operational Delhi Metro Botanical Garden – Janakpuri West corridor. The tunnel will be constructed approximately at a depth of 14 to 16 metres. About 2,040 concrete rings will be installed in the tunnels. 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 12 months. The alignment of tunnel runs along the outer ring road and below the multi-storied built up structures.

The tunnel will be built up with proven technology of EPBM (Earth pressure balancing method) with concrete lining made up of precast tunnel rings.

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