TBM Makes Breakthrough at Delhi Metro’s Aravali Mid-Shaft

Yet another breakthrough! This is the 4th one for the month after recent breakthroughs at the Pink line’s Mayapuri shaft, Magenta line’s Panchsheel Park station and the Violet line’s Delhi Gate station.

This time around, a Hitachi TBM deployed by the L&T-SUCG team for contract CC-27 of Delhi Metro’s Phase 3 project made a breakthrough at the Magenta line’s Aravali mid-shaft! The TBM excavated & built a 652m long tunnel for the new 38.235 km Magenta line’s down-line after being commissioned from the Vasant Vihar station in August 2015. As previously mentioned, the TBM actually reached the mid-shaft last week. The contractor then took 3 days to drill through the shaft’s diaphragm wall to reveal the TBM’s cutterhead and remove debris.

Satellite view of the Aravali mid-shaft

Delhi Metro's Aravali midshaft - Vasant Vihar section - view Delhi Metro map & information

Alignment of the Vasant Vihar – Aravali midshaft section – view Delhi Metro map & information


Relic inside a Greek temple, anyone? – Photo Copyright: Shalabh Gupta


TBM Breakthrough #9 for L&T-SUCG – Photo Copyright: Shalabh Gupta

The 38.235 km Magenta line between Janakpuri W and Botanical Garden in Noida now has only 6 more TBM breakthroughs to go before all tunneling works are wrapped up:

Contract Contractor Origin Destination Tunnel
CC-23 Pratibha – FEMC Greater Kailash Nehru Enclave Down-line
CC-23 Pratibha – FEMC Chirag Delhi Greater Kailash Up-line & Down-line
CC-27 L&T – SUCG Shankar Vihar Aravali Mid-Shaft Down-line
CC-27 L&T – SUCG Vasant Vihar RK Puram Mid-Shaft Up-line
CC-27 L&T – SUCG Vasant Vihar Munirka Down-line

For a comprehensive report with progress made on all lines’ tunnels, please see my March 2016 Tunneling Update.

For more updates on the Delhi Metro’s Phase 3, check out the Delhi section of The Metro Rail Guy!


written by

Global traveler who prefers mass rapid transit

4 Responses to "TBM Makes Breakthrough at Delhi Metro’s Aravali Mid-Shaft"

  1. Varun Seth says:

    That’s some serious hard rock. Congrats to the team for pulling this off.

  2. Kashyap says:

    DMRC has just updated their official website today morning!

  3. MD Adil says:

    thinking for given this opportunity my name MD Adil B.tech in Mechanical Engineer AKU university Patna


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