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PDB 62

Construction Project
Municipal Train Duisburg, Construction Phase TA6-Lot 21
Location
  • Duisburg-Duissern
Client
  • City of Duisburg
Planning
  • Metropolitan Railway Construction Office of the City of Duisburg
Investment volume
  • approx. DM 8.0 million
Construction time
  • 36 months
Activities
  • Construction management
  • Contract management
  • Technical coordination
Structures constructed
  • Two one-track tunnels build one above the other (L = 30 m)
  • Track deviation and starting shaft shield tunnelling with open construction method (L = 114 m)
Special features
  • Roof shaft tunnelling with the protection of an injection hood
  • Creation of a trough underneath the roof shaft by using high-pressure injection technology
  • Widening of roof shaft and installation of inner shell of the upper tunnel
  • Driving of lower tunnel under protection of high-pressure injection technology and of the upper tunnel
  • Installation of inner shell of lower tunnel
  • No lowering of groundwater level required thanks to use of injection and high-pressure injection technology
Utilization
  • Metropolitan railway tunnel of the City of Duisburg
Construction
  • Full excavation with gradated road header using New Austrian Tunnel method
  • Temporary securing of tunnel using lining arches, concrete reinforcement steel and spray concrete
  • Design of the tunnel inner shells as concrete impervious to water
  • Excavation pits with subterraneous curtains and overlapping caisson piles
  • Watertightness of the excavation pits by binding the subterraneous curtains and caisson piles in the in-situ carbon
Geology
  • Two groundwater storeys with seasonal fluctuations between 4.0 and 8.5 m
  • Fills, clay, gravel, sand, fine sand, potter’s clay
  • Chalk silt without sand inclusions respectively with sand strips and sand layers
  • Rock of the carbon