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Koralm Railway Line, Mittlern–Althofen Section, Tunnel Structures

The Koralm railway line project between Graz and Klagenfurt, developed by ÖBB Infrastruktur Bau AG, involves the construction of six tunnels between Mittlern and Althofen.
Transportation & Urban SpacesTunnelsUrban Transportation
Client:
ÖBB Infrastruktur Bau AG
Location:
Austria
Time frame:
2006–ongoing
  • Total length: 3.2 km
  • 4 twin-track railway tunnels
  • Excavation: NATM (120 m²)
  • Cut-and-cover tunnel (specific section: top down construction)
  • Particularities: special construction method due to lacustrine clay
  • Engineering
  • Project Management

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