MMRC achieves 35th breakthrough, completes 91% tunneling work

| | Mumbai
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MMRC achieves 35th breakthrough, completes 91% tunneling work

Thursday, 17 December 2020 | TN RAGHUNATHA | Mumbai

As it achieved its 35th breakthrough near Dadar Metro Railway station, the Mumbai Metro Rail Corporation (MMRC) Ltd announced on Wednesday that it had completed 91 per cent of the tunnelling work in the 33.50 km-long fully underground Colaba-SEEPZ Mumbai Metro Line 3.

With its latest breakthrough, the MMRC has so far completed tunnelling work in four out seven packages of the underground Colaba-SEEPZ Mumbai Metro Line 3. “We have completed 91 per cent of tunnelling work and 61 per cent of civil work,” a MMRC spokesperson said.   

With the 1.12 km-long tunnel from Siddhivinayak to Dadar, the MMRC has completed package number four -- involving tunneling of 10.96 km length.  In all, the MMRC deployed three Tunnel Boring Machines (TBMs) during the work on package number 4.

“We are happy to announce 100% completion of tunneling work in 4 out of 7 packages. Tunneling in package-4 was particularly a challenging task as all the stations are located in close proximity to developments, active road traffic and popular religious places. Dadar, considered the heart of the city, will provide connectivity that will ease commuting woes of Mumbaikars”, MMRC Managing Director Ranjit Singh Deol said.

“The Herrenknecht made TBM Krishna-1, equipped with Earth Pressure Balance technology, had started its main drive on July 7, 2020 and has completed the downline stretch using 805 rings. The overall progress of Dadar Metro Station is around 42 per cent,” MMRC’s Director (Projects) S K Gupta said.

The Package-4, which comprises Siddhivinayak, Dadar and Shitladevi stations, witnessed 8 breakthroughs (Nayanagar to Dharavi (Upline – 589m and downline – 589m), (Nayanagar to Dadar (Upline –  2491m  and downline –  2472m), (Siddhivinayak to Dadar (Upline –1106m and downline – 1126m), (Siddhivinayak to Worli (Upline – 1305m and downline – 1284m).

It may be recalled that on November 6, the MMRC had achieved 34th breakthrough of the 648-m long tunnel from Churchgate to Hutatma Chowk station. Robbins-made Dual mode hard rock Tunnel Boring Machine (TBM) Surya-1 completed the upline stretch in 292 days using 506 rings.

Hutatma Chowk is one of the most significant stations on the Colaba-Bandra-SEEPZ Metro-3 corridor as it provides proximity to Churchgate station, Bombay High Court, head offices of various banks and financial institutions, Consulates of a few countries, Bombay Stock Exchange, Ballard Estate, many hospitals, Colleges, Wankhede and Brabourne Stadiums, Jehangir Art Gallery, National Gallery of Modern Art (NGMA), Asiatic Library, Gateway of India and a number of delicious cuisines etc.


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