Terratec’s Delhi Metro TBM Narayani Passes Factory Tests for Silver Line

J Kumar Infraprojects and tunnel boring machine (TBM) manufacturer Terratec this Saturday completed factory acceptance tests (FAT) in Mumbai on TBM S-111 for constructing Delhi Metro’s 23.622 km Silver Line which will connect Aerocity – Tughalakabad via 16 stations.

This new 6.61m diameter Earth Pressure Balance (EPB) machine nicknamed Narayani will the third of three machines to be deployed by J Kumar for building twin tunnels on 65.1 km Delhi Metro Phase 4 project‘s 6.116 km Package DC-08 between Aerocity – Kishangarh.

Photo by Swatantra Parashar

Delhi Metro Rail Corporation (DMRC) had awarded J Kumar with 65.1 km Delhi Metro Phase 4’s Rs. 1611.74 crore contract for Package DC-08 in March 2022 with a 42 month deadline.

J Kumar’s 6.116 km Aerocity – Kishangarh section is on the western-end of the line and comprises of twin tunnels, and 4 stations at Aerocity, Mahipalpur, Vasant Kunj & Kishangarh from chainage (-) 760 mt. to 5356.285 mt.

Indicative alignment of Delhi Metro Silver Line’s Package DC-08 – view Phase 4 route map & info

Some snaps from Mumbai’s Ghodbunder Road:

Photo by Swatantra Parashar
Photo by Swatantra Parashar

J Kumar’s tunneling plan for S111 remains unknown to me, but that should be somewhat clear in the next 2 months. They’ve already deployed 2 refurbished machines from Mumbai Metro’s Line-3 at Kishangarh Station towards Vasant Kunj: TBM S63B (Sonakshi) and TBM S64B (Shalini).

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Global traveler who prefers mass rapid transit

4 Responses to "Terratec’s Delhi Metro TBM Narayani Passes Factory Tests for Silver Line"

  1. Abhishek says:

    Hi.. do you know what happened to that arbritration case award to Reliance. Has DMRC paid that amount ?

  2. Pankaj Sharma says:

    Hi TMRG,

    Silver line construction is so slow. At present, in Aug 2023, TBM is just passing factory acceptance test.
    Due you think at such speed DMRC is able to complete silver line by their revised timelines March 2026.
    It seems, at such slow pace dmrc may not able to complete silver line by 2030.

    • TMRG says:

      Hi, tunneling has started across all packages, but we’re just in the initial stage. Let’s see what challenges show up as the Aravalis aren’t fun to dig through. March 2026 completion will definitely not be achieved.


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