Mumbai: The Mumbai Metro Rail Corporation (MMRC) is executing the 33.5 km corridor of which the 5 km of tunneling across its alignment in the city has been completed. Underground corridor for the Colaba-Seepz metro line has completed 10% of tunneling work.
The memorial of Emperor Shivaji is interestingly being built using rubble from excavating 33.5 km long Colaba-Seepz underground Metro line
— ajith (@vakilatlarge) December 24, 2016
The four location where the underway tunneling is constructed Marol, Naya Nagar(Mahim), Vidyanagari (Kalina), Azad Maidan and all this is being done with eight tunnel – boring machines (TBM’S) in operation.
The TBM’s need to bore 52 km (without stations) for both the up and down lines for the construction of the underground corridor.
Ashwini Bhide, Managing director, MMRC said that The tunneling commenced in November 2017 from the Naya Nagar-launching shaft in Mahim, and the TBMs are currently moving at a speed of 350m per week. “We are pleased to announce the completion of 5km of tunneling within one year of the project’s initiation. We are positive about completing the project by December 2021”.
Ashwini Bhide, Managing director, MMRC said that The tunneling commenced in November 2017 from the Naya Nagar-launching shaft in Mahim, and the TBMs are currently moving at a speed of 350m per week. “We are pleased to announce the completion of 5km of tunneling within one year of the project’s initiation. We are positive about completing the project by December 2021”.
They expect that the first TBM breakthrough will be achieved in the 4.15km Marol-MIDC-Seepz (package 7) section of the construction by September 2018 says the corporation official.
The progress depends on the geological conditions of the location. They target to bore an average of 700-800m per week, according to the Mumbai Metro Rail Corporation (MMRC). At a depth of 25m to 30m by lowering a TBM, lowering in shaft depth and because of this the tunneling work is carried out.
The Mumbai Metro Rail Corporation is in the process of lowering three additional TBMs and will lower two more by July-end to increase the pace of tunneling for the mega project says, officials.
