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.
“The boots are the most crucial part of tracks in ensuring lesser vibrations and smoother ride for the commuters. To ensure performance production is being supervised by the Swiss experts from M/s. Sonneville”, said Mr. S. K. Gupta, Director (Projects), MMRC.
Mumbai Metro Rail Corporation (MMRC), on November 6, 2020 achieved the 34th breakthrough of the 648-m long tunnel from Churchgate to Hutatma Chowk station. Robbinsmade Dual mode hard rock Tunnel Boring Machine (TBM) Surya-1 has completed the upline stretch in 292 days using 506 rings.
- The overall progress of Hutatma Chowk station is 53%.
- Package-1, which consists of Cuffe Parade, Vidhan Bhavan, Churchgate and Hutatma Chowk stations, showcases overall tunnelling progress of 81% and 70% of overall station work.
- The total tunnelling of the project completed is 89% and civil work is 61%.
Source: Mumbai Metro-Press Release