Mumbai Metro-3 update: MMRC achieves 35th breakthrough at Dadar Metro Station

The Mumbai Metro Rail Corporation (MMRC), on December 16, 2020 achieved 35th breakthrough at Dadar Metro Station. With the 1.12 km. a long tunnel from Siddhivinayak to Dadar, package-4 has completed its entire tunneling of 10.96 km. for which three TBMs were deployed in total. 

“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 heart of the city, will provide connectivity that will ease commuting woes of Mumbaikars”, said Mr. Ranjit Singh Deol, Managing Director, MMRC.

“The Herrenknecht made Tunnel Boring Machine (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%”, Mr. S.K. Gupta, Director (Projects), MMRC, provided further details.

Package-4 which includes Siddhivinayak, Dadar and Sitladevi 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).

Recent Achievement:

Mumbaikars’ underground travel on the Colaba-Bandra-SEEPZ Metro-3 corridor is further smoothened as the Mumbai Metro Rail Corporation (MMRC) has begun trial production of High Vibration Attenuation Booted Twin Sleeper Blocks to lay tracks with the help of Swiss machinery installed by M/s. Sonneville from Switzerland.

  • The Sleeper Blocks are being cast  with the help of state-of-the-art technology at a facility set up at Wadala. One more machine is expected soon.
  • This type of track is being used for the first time in India and will have characteristics of absorbing vibrations up to 22 VdB over and above the vibrations that are absorbed by a normal metro track. 
  • It is also best suited for a city like Mumbai where there are heritage structures, congested areas and sensitive receptors like hospitals, schools, colleges, studios Etc.
  • The two machines will cast 12,000 Sleeper Blocks every month to meet the requirement of a total of two lakh one thousand and six hundred Sleeper Blocks for the entire project. 

Source: MMRC-Press Release