TBM T61 provides breakthrough to Mumbai Metro Line-3
Tunnel Boring Machine (TBM) T61, also called Tapi-1, operated by the J Kumar Infraprojects – China Railway Tunnel Group JV made a breakthrough at Chhatrapati Shivaji Maharaj International Airport's Domestic Terminal-1 Station's at the northern end on Mumbai Metro's 33.5 km Aqua-Line (Line-3). The was T61's second and final breakthrough, J Kumar – CRTG's fifth (and penultimate) breakthrough for the 4.45km Santa Cruz Mid Ventilation Shaft – CSIA Terminal 2 Package UGC-06, and overall Mumbai Metro Line-3's 31st TBM breakthrough. This Ø6.68m dual-mode Terratec TBM had passed factory acceptance tests in September 2017 and arrived in the city in November the same year. For its first assignment, it was commissioned as TBM Godavari-1 from Package UGC-05's Vidyanagari Station to the Santa Cruz Mid Ventilation Shaft (dead-end of UGC-05/06) and onwards to CSIA's Terminal-1 Station for building the 2895 meter up-line tunnel and recorded a joint breakthrough for UGC-05 and UGC-06 in April 2019. For its last assignment – the machine was commissioned from Sahar Road Station towards Terminal-1 to build the 1512 meter down-line tunnel.
📅Published on:
25 September 2020
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