Tunnelling begins below Mithi river for Mumbai Metro Line-3 project

Tunnelling begins below Mithi river for Mumbai Metro Line-3 project

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Date of Post: 8 Feb, 2019

Mumbai: The MMRC (Mumbai Metro Rail Corporation) on Wednesday has begun tunnelling below the Mithi river for Mumbai Metro Line-3 project. A 153m long tunnel below Mithi River will be dug using New Austrian Tunneling Method (NATM ) between Dharavi and BKC (Bandra-Kurla Complex).

More Information:

  • MMRC tweeted,”Tunneling by New Austrian Tunneling Method (NATM ) commenced today at the south end of BKC Station for the 153m long tunnel below Mithi River. This will facilitate stabling of spare train during operations. This will also act as a Sick Siding.”

  • “The NATM tunnelling will be carried out in three parts — top heading, benching and invert. The first step includes creating a support system by using various ways, to stabilise the rocks. The situation in this area is different from other areas due to the water above,” S K Gupta, MMRCL director (projects) had said.
  • Unlike the tunnels built by the TBM, those built by NATMs are arch-shaped.
  • By using small excavators, instead of the regular ones and with controlled blasting, a tunnel will be created below the Mithi river.

The deadline for the completion of first Phase of Mumbai Metro line-3 is December 2022.


All Image Credit: MMRC

To know more about recent developments of Mumbai Metro –

31 Jan, 2018:  MMRC successfully carries out twin tunnel breakthrough at Dadar Metro Station

16 Jan, 2019: MMRC Awards Contract for Automatic Fare Collection (AFC) System for Mumbai Metro Line-3

04 Jan, 2018: Mumbai Metro Update : Kasarvadavali-Gaikmukh Metro-4A route expected to be completed by 2022

( Please reach us at editor@railanalysis.com for more information. )

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