ILF designs tunnel and open-air section for railway linemore
With the new railway line between Köstendorf and Salzburg (AUT), an efficient connection will be built additionally to the 150-year-old existing line. The key passage of this 21.3 km long railway line is the 16.5 km long Flachgau tunnel.
ILF Consulting Engineers together with a business partner was entrusted with the permit application design of the tunnel by ÖBB INFRA. The Flachgau tunnel will be a twin-tube tunnel with one track per tube. The design services shall partly be carried out using the BIM method and shall also include the option for the tender and construction design together with the geotechnical engineering on site as well as the maintenance design.
This tunnel, constructed and advanced underneath the existing line using the New Austrian tunneling method (NATM), a tunnel boring machine (TBM), the cut-and-cover method and box jacking, is a very challenging assignment with complex planning and design works.
Furthermore, the joint venture comprising ILF and Werner Consult won the contract for the design of the open-air section of the railway before and after the tunnel, with a total length of 4.3 km.
The open-air section also includes the Fischach tubular bridge having a span of approx. 42 m.
We look forward to this demanding project.