Home Contract News Porr and Rhomberg to lay slab track in Austria’s Koralm tunnel

Porr and Rhomberg to lay slab track in Austria’s Koralm tunnel

Austrian Federal Railways (ÖBB) has awarded the railway infrastructure contract for the Koralm tunnel to the ‘ARGE FF Koralm’ joint venture.

The Koralm Tunnel, under construction under the Koralpe mountain range in Austria, lies on the 130km (81 mile) Koralm railway that will link Graz with Klagenfurt.

Under this contract, ARGE partners Porr Bau and Rhomberg Bahntechnik will commence construction of the 34.1-kilometre long section through the tunnel (which is itself 32.9km long) in May 2021. The line is due to open in 2025.

Porr will take the technical lead on the contract while Rhomberg Bahntechnik will be responsible for the commercial management.

A key element of the contract, worth around €160 million, is the construction of almost 66km of slab track in the tunnel.

In addition, the contact includes sections of ballasted track leading to both tunnel portals, as well as preliminary work for the telecommunications system, construction of the ventilation buildings at the east and west portals, completion of the east portal and construction of the west portal.

The contract also calls for construction of noise barriers and fall protection barriers, upgrading drainage and road construction work on the L145.

Finally, the joint venture will be responsible for the supply and installation of the overhead contact line (OLE) as well as all temporary works up until commissioning in 2025.

Johannes Fürst, head of the railway department at Porr, said: “It makes us proud to contribute to the success of this important infrastructure project for Austria with our expertise.”

Robert Kumpusch, managing director of Rhomberg Bahntechnik, said: “We are especially pleased to be implementing a project, together with the ÖBB, that promises a particularly sustainable and high-quality result, thanks to innovative ideas and an economic approach.”

Both partners will draw on their know-how and experience to complete the project on schedule, within budget and to the client’s full satisfaction.

Nigel Wordsworth BSc(Hons) MCIJhttp://therailengineer.com

SPECIALIST AREAS Rolling stock, mechanical equipment, project reports, executive interviews


Nigel Wordsworth graduated with an honours degree in Mechanical Engineering from Nottingham University, after which he joined the American aerospace and industrial fastener group SPS Technologies. After a short time at the research laboratories in Pennsylvania, USA, Nigel became responsible for applications engineering to industry in the UK and Western Europe. At this time he advised on various engineering projects, from Formula 1 to machine tools, including a particularly problematic area of bogie design for the HST.

A move to the power generation and offshore oil supply sector followed as Nigel became director of Entwistle-Sandiacre, a subsidiary of the Australian-owned group Aurora plc. At the same time, Nigel spent ten years as a Technical Commissioner with the RAC Motor Sports Association, responsible for drafting and enforcing technical regulations for national and international motor racing series.

Joining Rail Engineer in 2008, Nigel’s first assignment was a report on new three-dimensional mobile mapping and surveying equipment, swiftly followed by a look at vegetation control machinery. He continues to write on a variety of topics for most issues.

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