Transportation tunnel to Kanonerskiy island under the fairway in Saint-Petersburg, Russia

Project description:

The tunnel was constructed via method of segments lowering

  • total tunnel length – 375m (Five segments per 75 meters long)
  • sizes of segments -75m x 13.3m x 3m
  • width of walls – 93 cm
  • weight of each segment – 8,000 tons
  • total volume of RC – 45,000 m³
  • traffic arrangement – 2 lanes per 2 way
    During construction period segments were assembled at site and placed to the bottom by floating to initial excavated ditch subsequently.