Mumbai: The Mumbai Metro Rail Corporation (MMRC) has completed approximately 15-16 percent of the civil construction for 33.5km of the 33-tunnel underground corridor. Work on the longest tunnel corridor in the country began in November 2016.
The first tunnel boring machine (TBM), called Krishna 1, started tunneling from the Nayanagar near Dharavi on November 9 and has now drilled 120 meters. Meanwhile, six other TBMs, lowered in different parts of the city, have combined 394 meter tunnels so far. 17 TBMs will operate 15 to 25 meters below ground to drill 51 km of tunnels.
Like Krishna, the TBMs in each of the seven packages are named after a river in Maharashtra: Surya, Vaitarna, Tanasa, Godavari, Tapi and Wainganga. Each package has at least two and no more than three TBM in operation.
“It’s better to refer to the machines with names with numbers because they are more identifiable. It’s a more personal connection with machines when they have a name. By naming just searched for names that were easy to remember and pronounced because they all relate to those with these names, “says SK Gupta, Director (Project), MMRC.
The Colaba-Bandra connection SEEPZ is likely to be completed in December 2021. The first phase of Aarey Milk Colony connecting the airport will be operational in March 2021, while the second phase of Cuffe Parade will be ready for December brokers.
According to a MMRC official, “The work involves workforce of about 7,600, including skilled and unskilled workers. “This adds staff to General Consultants (GC), MMRC staff, managers and engineers from civilian contractors and several suppliers working on the project.”
Works at all 26 subway stations and one in the rating station has begun and 53 percent of stacking activity has been completed with 16,597 batteries.
About 1500 people affected by projects (PAP) have been rehabilitated to build the corridor at a cost of 23,136 crore.
At the same time two elevated metro corridors are under construction in the suburbs: Dahisar West DN Nagar Metro Dahisar 2A and East Andheri East Metro 7. Even the construction of the two runners began in November 2016 Metro 2A completed around 35 percent of the building and the subway 7 has stopped about 45 percent.
The project is being carried out by the Delhi Metro Rail Corporation (DMRC). For the construction of the 18.5-km Metro 2A, 400 out of 957 piers have been erected and out of 1430 U-girders 215 have been erected. Meanwhile, 64 per cent of the piling activity has been completed.
5-km Metro 7 corridor, 227 of 709 piers have been erected and 198 of 1184 U-girders have been erected, apart from 73 per cent of the piling activity being completed.
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Here three stations are in advanced stage of construction in Aarey Colony, Mahanand and Magathane.
