The event was attended by representatives of Delhi Metro Rail Corporation Ltd and J Kumar Infraprojects Ltd, the contractor for Phase-IV, Contract DC-08.
TBM S111, named Narayani, will construct 6.116km twin tunnels for the Silver Line for the 65.1km Delhi Metro Phase 4 project Package DC-08, between Aerocity and Kishangarh stations.
Terratec has delivered three TBMs for the project. They include both new and refurbished EPBMs to construct the 23.62km-long, 5.7m-wide Silver Line tunnel, connecting Aerocity to Tughlakabad via 16 stations. The anticipated launch point for TBM S111 is the Aerocity shaft, while the previously launched TBMs, S63B and S64B, have already commenced operations from the Kishangarh shaft.
Narayani was manufactured in India, with key components from abroad.
The EPBM has a robust mixed-face dome-style cutterhead designed for the expected mixed geology, including quartzite, sandy silt and rocks.
As the TBM progresses, 1,400mm-wide by 275mm-thick universal reinforced concrete lining rings will be installed, comprising five segments plus a key. Electric locomotives will be used for muck removal, segment transport and supply of consumables.
