Demoulding and turning tunnel segments

Efficient production of tunnel segments for the Delhi-Meerut Regional Rapid Rail Transit System (RRTS) in India. Another tunnelling project for which Aerolift vacuum lifting equipment is used to ensure efficiency and safety.

Production of tunnel segments

The Aerolift vacuum turners allow demoulding after 8 to 10 hours. Suction only takes two seconds, after which the turner is ready to demould, lift and turn 180 degrees. Moreover, the turner is operated from a safe distance with a pendant control and never damages the segments.

We have previously supplied this customer in India with Aerolift vacuum turners. A fun fact: these previous vacuum turners are also being used again in this project. The machines are more than 10 years old and continue to do what they were built for.

More Aerolift tunnelling solutions

We offer solutions for the complete handling operation of tunnel segments. From production to installation. Check our article about handling tunnel segments.

Vacuum turner AeroliftVacuum turner Aerolift

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  • India
  • 2021
  • 4 tons
  • 180 degrees



  • Tunnel segments (6 + 1 ring configuration)
  • Diameter extrados: 7,250 mm
  • Width: 1,500 mm
  • Thickness: 300 mm
  • Weight appr.: 3,900 kg tunnel segment / 1,300 kg keystone

More about the lifting solution:

  • Lifting capacity: 4,000 kg
  • Length device appr: 3,500 mm
  • Width appr.: 920 mm
  • Loss in lifting height appr.: 3,300 mm
  • Dead weight device appr.: ca. 2,000 kg, incl. suction pad(s)