TBM T60 starts Tunneling for Mumbai Metro Line 7A

TBM Dhruva has been assigned to build a 2.49 km long tunnel on the Red Line.

TBM T60 starts Tunneling for Mumbai Metro Line 7A
TBM T60 starts Tunneling for Mumbai Metro Line 7A

MUMBAI (Metro Rail News): The Tunnel Boring Machine T60, named “Dhruva”, was installed on Mumbai Metro’s Red Line at Chhatrapati Shivaji International Airport’s Terminal 2 station. 

It is the 2nd TBM to be commissioned by J Kumar Infraprojects (JKIL). It has been deployed on Red Line’s Line 7A, which runs between Gundavali & CSIA. 

Increased Connectivity

The line 7A will be connecting Andheri East & Chhatrapati Shivaji International Airport along with expanding the existing Line 7. The new line will also provide direct connectivity to Metro 9, Metro 2A & Metro 7. It will provide people with direct connectivity from Bhayander to the International Airport. 

Prior Deployment

The TBM was previously deployed on Mumbai Metro Line 3’s 4.94 Km package UGC-05 ( Dharravi-CSIA T1) & Package /uGC-06 ( CSIA T1- Marol Naka). The 06.68m Dual Mode Terratec Machine was refurbished at J Kumar’s yard for redeployment.  

Scope of work

The TBM will build an approximately 2.49 km tunnel for the downline tunnel from  CSIA Terminal 2’s station to Airport Colony station and a ramp on the Western Express Highway (WEH), with the initial drive expected to be finished in a month. The tunnelling project will be carried out at a depth of 12-28 meters and will be completed by June 2024. 

The Contract

The contract for  Package CA-48 was awarded to J Kumar Infraprojects (JKIL) in September 2019 with an estimated cost of Rs 1,998 Crore by the Mumbai Metropolitan Region Development Authority. 

The scope of the contract includes 

  1. 11.38 Km elevated Line 9, 
  2. Line 7A’s viaduct, ramp & underground tunnel, 
  3. 2 Sttaions at Airport Colony & CSIA Terminal 2. 

In the future, it will meet the under-construction Aqua Line and Gold Line linking to Navi Mumbai International Airport. 

Line 7A

The 3.42 km long metro line running along the Western Express Highway will mix underground and elevated routes with 2.49 km of line running underground. The corridor will have two stations: Airport Colony and T2 Airport. The entire tunnelling of the project is expected to be finished by June 2024. 

Discover the endless possibilities of our city’s Metro at InnoMetro, our flagship Expo and Conference. Be an active participant in shaping its future towards a more sustainable tomorrow. Stay informed and join us to take a step towards a brighter future.

Daily Updates from Metro & Railway


Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.