TBM T-58 Lowered into Mumbai Metro’s CST Station

On October 30, workers from the Hindustan Construction Company – OSJC Moscow Metrostroy JV began lowering parts of T-58 – their first of two Terratec tunnel boring machines (TBM) into the Chhatrapati Shivaji Terminus (CST) Station’s northern end for constructing a part of Mumbai Metro’s new 33.5 km Line-3’s tunnels.

This Ø6.68m 817 tonne dual-mode TBM successfully passed factory acceptance testing (FAT) in July 2017 and arrived at the city’s port in mid September. The HCC-OSJC JV plans to complete assembly towards the end of November. Once done, it’ll excavate 3817m for the up-line tunnel from CST → Kalbadevi → Girgaon → Grant Road → Mumbai Central as part of the 4.049 km package UGC-02 (Chhatrapati Shivaji Terminal Station – Mumbai Central’s TBM receiving shaft).

UGC-02: CST – Mumbai Central section of Line-3 – view Mumbai Metro map & info

This is the 3rd of 17 TBMs, after S-1073 and S-1074, to be lowered into a shaft/station for constructing the line’s tunnels. Here are some site images shot at different times over the past week –

Cradle waiting to receive the TBM’s parts – Photo Copyright: Brijit Gupta

Front shield – Photo Copyright: MMRCL

Photo Copyright: MMRCL

Photo Copyright: Sarit Chhipa

Photo Copyright: Suraj Kumar Panday

Photo Copyright: Suraj Kumar Panday

Photo Copyright: Harjinder Singh

Segment erector getting fixed

Its sister machine (T-59) passed factory acceptance tests in mid-October and is currently on its way to Mumbai. The first TBM on the entire project (S-1073) will begin tunneling works today – stay tuned for a follow up post.

For more updates, check out the Mumbai section of The Metro Rail Guy!

– TMRG