Soil Testing Begins for Mumbai Metro Red Line-7A’s Airport Extn
Workers from DBM Geotechnics & Constructions Pvt. Ltd. on a sub-contract from J Kumar Infraprojects have begun geo-technical soil investigation work for building Mumbai Metro Red Line’s 3.17 km mostly underground Line-7A to connect Andheri East with Chhatrapati Shivaji Maharaj International Airport (CSIA)’s Terminal 2.
Geotechnical investigation reports are usually made available to all interested infrastructure companies during the bidding stage by the operator, in this case by the Mumbai Metropolitan Region Development Authority (MMRDA), but contractors usually re-validate those findings prior to the start of construction to ensure the optimal design is selected for constructing the line’s foundation or substructure.
J Kumar is the civil contractor for this extension (package CA48), and was awarded a Rs. 1,998 Cr contract in September 2019. Their scope of work in this package, besides the 11.38 elevated Line-9 extension, includes building the line’s viaduct, ramp and underground tunnels (2.915 km) and 2 stations at Airport Colony and CSIA Terminal 2, where it’ll meet the under construction Line-3 (Aqua Line), and in the future, Line-8 (Gold Line).
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– TMRG
Why are they not connecting Sahar rd station with this line?
Most likely not worth the cost – looking at that station’s projected ridership on the Aqua Line and T2 station being next door?
Which method will be use for making tunnels for underground section of a Red Line, is it TBM’s or Cut & Cover Method. I think they will make this section with TBM’s because it may be disruptive for the Airport to make C&C method.
Tender notice had mentioned Cut & Cover
https://mmrda.maharashtra.gov.in/documents/10180/13580215/Paper+Publishing+_25.pdf/acb7f270-2fd5-45d8-988a-f82a1bd2d5ed?version=1.0