The nation’s deepest underground rail air flow shaft equal to a 15 storey constructing and an vital a part of town’s East-West Metro line was accomplished on Monday, officers mentioned.
The air flow shaft, which is 43.5m deep, was accomplished collectively by Kolkata Metro Rail Company (KMRC) and Afcons, a personal engineering firm.
Such shafts usually are not solely used to supply air flow to the tunnels, but additionally for evacuation throughout an emergency.
The evacuation shaft is positioned on Strand Highway close to Hooghly river, a press release mentioned.
“The Metro shaft has been constructed adopting revolutionary engineering methods and methodology to navigate geological challenges and overcome any influence on Kolkatas round railway monitor alongside the Hooghly, Afcons challenge supervisor Satya Narayan Kunwar assist.
The shaft is positioned very near the river and abutting with the round railway which makes its deep excavation very difficult, it mentioned.
The round railway line runs parallel to the river in stretches.
The 16.6 km-long speedy transit challenge will join the dual cities of Kolkata and Howrah.