The last Tunnel Boring Machine (TBM) to excavate & build the 23.807 km underground section of Delhi Metro’s 38.235 km Magenta line from Janakpuri W to Botanical Garden has been commissioned! Yesterday evening, the Pratibha-FEMC JV team for contract CC-23 of the Delhi Metro Phase 3 project started tunneling work for the 545m down-line tunnel from the Chirag Delhi station towards the Greater Kailash (GK) station, and completed building one temporary ring by midnight. Tunneling work for this section’s parallel up-line tunnel started on January 16.
Images from the Chirag Delhi station’s TBM launch shaft:
Parts of this TBM were lowered into the launch shaft in January. Here are a couple of images:
The distance between the Chirag Delhi and Greater Kailash stations is only 545m – one of the shortest on the line, so this TBM can be expected to make a breakthrough at Greater Kailash in May.
With this TBM on its way, there are now 9 TBMs operating on the following sections of the Magenta line:
|CC-23||Pratibha – FEMC||Greater Kailash||Nehru Enclave||Up-line & Down-line|
|CC-23||Pratibha – FEMC||Chirag Delhi||Greater Kailash||Up-line & Down-line|
|CC-23||Pratibha – FEMC||Chirag Delhi||Panchsheel Park||Down-line|
|CC-27||L&T – SUCG||Shankar Vihar||Aravali Mid-Shaft||Down-line|
|CC-27||L&T – SUCG||Vasant 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|
Out of last 9 TBM breakthroughs, 3 of them are expected to take place towards the end of this month. In no particular order:
• At the Aravali mid-shaft from the Vasant Vihar station for the down-line tunnel. The parallel up-line tunnel was completed in January 2015. See: #TBT – Delhi Metro Completes Palam – Shankar Vihar Tunnels
• At the Panchsheel Park station from the Chirag Delhi station for the down-line tunnel. The parallel up-line tunnel was completed in December 2015. See: Delhi Metro TBM Makes a Breakthrough at Magenta Line’s Panchsheel Park Station
• At the Nehru Enclave station from the Greater Kailash station for the up-line tunnel. The parallel down-line tunnel has completed roughly 1/3rd of its journey and is expected to make a breakthrough in April.
For a detailed report with recent progress made on all Delhi Metro Phase 3 lines’ tunnels, please see my February 2016 Tunneling Update.
For more updates on Delhi Metro’s Phase III, please visit the Delhi section of The Metro Rail Guy!