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Dybbølsbro district heating tunnel, Copenhagen

  • Specialised civil engineering
  • Eiffage Infra-Spezialtiefbau

Client

HOFOR

Project volume

0.4 million EUR

Construction time

2 months

Compressed air jacking DN 2500 under the main tracks of the Copenhagen long-distance railway station with the crossing of a former bank reinforcement

  • Pneumatic tunnelling with open bonnet blade
  • Roadheader excavator
  • Dry conveying
  • Compressed air up to 0.7 bar
  • Undercutting 21 tracks at Copenhagen Central Station
  • Subsoil Sand, gravel, stones, boulders, erratic blocks
  • Advantage of open shield: removal of a large number of boulders up to 1.40 m in length (former bank stabilisation)
  • Use as a district heating and media tunnel