Workers from Larsen & Toubro on Friday lowered and deployed the first flash butt welding machine at CSIA’s Terminal 2 Station to begin track-installation work on Mumbai Metro’s 33.5 km Line-3 (Aqua Line) which will connect Cuffe Parade – BKC – Aarey Colony through 27 stations.
The machine by Holland LP will weld 18 meter long Head Hardened (HH) rails supplied by Mitsui & Co. The first batch of 3,615 MT HH rails had arrived in the city back in June, and will now be welded to form a high attenuation low vibration track system to reduce noise and vibration levels.
As of today, L&T has received a total 8,366 MT out of a total of 10,740 MT of HH Rails on order for two contracts they secured from Mumbai Metro Rail Corporation (MMRC) over the past year:
- Package 10B for Rs. 303.27 crore awarded in June 2019 for ballastless track on the Cuffe Parade – BKC (Phase 2) section
- Package 10C for an undisclosed amount awarded in January 2020 for 40 kms of ballasted tracks inside the disputed Aarey Depot and ballastless tracks on the BKC – Aarey Colony (Phase 1) section.
Per MMRC’s tweet they’ve identified 11 locations on the underground line where the machine will weld HH Rails at levels of 1000 amp.
I imagine all of these locations are on the 4.16 km Package UGC-07 (Sariput Ramp – CSIA T2) owned by L&T-STEC JV and the 4.45 km UGC-06 (CSIA T2 – Santa Cruz Mid-Ventilation Shaft) owned by J Kumar – CRTG JV where tunneling works are largely over, with just one TBM breakthrough pending at CSIA’s Terminal 1 Station – see a list of pending breakthroughs here.
For more updates, check out the Mumbai section of The Metro Rail Guy!