Yesterday afternoon, the S26 Tunnel Boring Machine operated by the J. Kumar – CRTG – Terratec team for contract CC-20 of Delhi Metro’s Phase 3 project made a breakthrough at the Mayapuri shaft! This Earth Pressure Balance TBM with a diameter of 6.61m was commissioned from the Naraina Vihar station on December 8 2015 and completed the 310m long down-line tunnel at the Mayapuri shaft of the new 58.59 km Pink line which encircles the city.
Satellite view of the Mayapuri shaft adjacent to the busy Ring Road:
To quickly recap, TBM S26 made it first breakthrough at Naraina Vihar station from the Delhi Cantt. shaft on October 5 after which it was dragged across the station’s length (roughly 200m) using hydraulic jacks over a period of roughly 18 days. Many images of the contractor dragging the TBM can be viewed here. The TBM was then commissioned on December 8 for one final drive which it completed in no time! 🙂
News Alert: TBM S27 which was commissioned on the parallel up-line on January 5 is expected to make a breakthrough at the same shaft later this month. Once that breakthrough is made, the 1103m twin tunnels of CC-20’s 2.2 km section from the Mayapuri ramp to the Delhi Cantonment ramp will be complete.
With this breakthrough out of the way, now only 7 more TBM breakthroughs are left on the Pink line:
Red: Yet to Begin ; Green: In Progress
|CC-04||CEC – CICI||Majlis Park shaft||Azadpur mid-shaft||Up-line & Down-line|
|CC-20||J Kumar – CRTG||Naraina Vihar||Mayapuri shaft||Up-line|
|CC-18||Pratibha – FEMC||RK Puram shaft||Bhikaji Cama Place||Up-line & Down-line|
|CC-24||J Kumar – CRTG||Ashram||Vinobhapuri||Up-line & Down-line|
For a more detailed report with progress made on all lines’ tunnels, please see my February 2016 Tunneling Update.
News Alert 2: A breakthrough at the Lal Qila station for the down-line tunnel of the Violet line will be made today! Once that is done, all 4 tunnels in contract CC-07 between Kashmere Gate – Lal Qila – Jama Masjid will be complete. I’ll be sure to post information & images, so do check out the home page of my site later!
For more updates on the Delhi Metro’s Phase 3, check out the Delhi section of The Metro Rail Guy!