Kolkata (Metro Rail News): Recently, the Principal Chief Engineer of Kolkata Metro has floated the tender for the civil construction work of Kolkata Metro Line-4’s underground extension from Biman Bandar (Kolkata Airport) to Birati.
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This contract includes the following scope of work:
- Construction of 3.59 km of metro tunnel
- Development of one underground metro station at Birati
- Underground construction work for the Birati and Michael Nagar stations
This contract is a part of the Kolkata metro yellow line’s extension to Barasat in the north-east.
Construction Methods of Underground Tunnel & Station
- The metro tunnel along Kolkata Airport’s boundary wall will be constructed using the RCC box-pushing method, without deploying tunnel boring machines (TBMs).
- On the other hand, the cut & cover method will be used for the construction of Birati station.
Tender Details
- Tender No: EPC-2489-2024
- Estimated Cost: ₹1,330.47 crore
- Project Duration: Approximately 910 days (2.5 years)
- Pre-Bid Meeting: September 6, 2024
- Bid Submission Deadline: November 5, 2024
Scope of work
The contract includes the Design, Procurement, and Construction of a Reinforced Cement Concrete (RCC) box metro tunnel. This also involves the construction of two underground metro stations, Birati and Michael Nagar, using the Cut & Cover method.
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The contract covers the installation and integration of track systems, E&M systems, tunnel ventilation, and 750 V DC Third Rail within a 3.59 km tunnel.
It also includes architectural finishing, firefighting systems, water supply, sanitary installation, drainage, BLT works, E&M services, ECS, TVS, and power supply systems, along with all ancillary works for extending the Metro Railway from Noapara to Barasat via Biman Bandar.
Kolkata Metro’s Yellow Line
- Line 4 (Yellow Line): This under-construction line stretches 6.87 km from Noapara to NSCBI Airport (Biman Bandar) and includes 4 stations.
- Extension of Yellow Line: The extension will extend the Yellow Line from NSCBI Airport (Biman Bandar) to Barasat, covering an additional 11.26 km with 6 stations. Currently, work is underway on the 3.6 km underground section of this extension.