Afcons Begins Kolkata Metro Line-6’s D-Wall Work at Airport

Afcons Infrastructure this weekend began work to construct the diaphragm wall (D-wall) of Kolkata Metro Line-6 (Orange Line)’s underground airport tunnel as part of Package ANVS-RVNL-1682.

Kolkata Metro’s Airport Station will serve as the northern terminal of the 29.87 km Line-6 (Kavi Subhash New Garia – Biman Bandar). It’ll also be a stop on the 6.87 km Line-4 (Noapara – Airport) which will be extended northward to New Barrackpore.

The station’s box is under construction by ITD Cementation with 4 lines and a train stabling facility. Afcons’ scope here includes constructing an approximately 950m underground cut & cover tunnel through the Airports Authority of India (AAI)’s land.

Puja to start grabbing & trenching works – Photo via Sanjib Nayak

Afcons was awarded Package ANVS-RVNL-1682’s Rs. 532.65 crore civil construction contract in January 2021 with a 36 month deadline. This 3.519 km mostly elevated civil package will connect Sub CBD-2 Station to Biman Bandar.

Their scope includes the construction of 2 new stations at Chinar Park (formerly Rabindra Tirtha) and VIP Road (Haldiram), and the following viaduct & underground sections:

  • Viaduct (2 sections)
    Section 1: (CH: 25900 approx.) to CP:801 (CH:27200 approx.)
    Length: 1300M (Approx.)
    Section 2: CP: 801 (CH: 27200 approx.) to start of ramp (CH:28450 approx)
    Length: 1250M (approx.)
  • Ramp/Underground
    Start of Ramp (CH:28450) to end of Design Limit (CH: 29400)
    Length: 950M (approx.)
Indicative location of stations and route of Sub CBD-2 – Airport section – view Kolkata Metro info & route map

Piling work for the elevated section had started in New Town in April 2021.

Photo via Sanjib Nayak
Lowering 1st D-wall cage – Photo via Sanjib Nayak
Photo via Sanjib Nayak

Here’s my go-to video to demonstrate how D-walls are built to form the boundary wall of station boxes and cut & cover tunnels:

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Global traveler who prefers mass rapid transit

6 Responses to "Afcons Begins Kolkata Metro Line-6’s D-Wall Work at Airport"

  1. Rupraj Sengupta says:

    This is on the left side of vip road,airport authority of India staff quarters.

  2. Gomes Clevin Clement says:

    TMRG, I’ve heard that MMRDA has Invited Bids to Construct Mumbai Metro Line 12. But the articles are shown doesn’t seems to be accurate. If it’s true, please cover up

    • TMRG says:

      Hi, in December they invited bids for appointing a Detailed Design Consultant. Bidding is underway, so there’s no way MMRDA has invited civil work tenders.

  3. Chandan Puitandy says:

    good job choto

  4. Abhishek Threja says:

    Recently tender opened for Kedarnath and Hemkunt Sahib ropeways under Parvatmala . Please write a post covering this also.

  5. T A Mandle says:

    The airport line will also extend to Barasat for which work is underway. But is any work underway for the New Barrackpore line which is mentioned in the article


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