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Porr consortium confirmed for largest tunnelling project in Austrian history

brenner basis tunnel

A consortium led by Porr has been confirmed as the winning bidders for the an €966m (£842M) design and build contract for an 18km section of the Brenner Base Tunnel in Austria.

To mark the formal end of the award process, the confirmation of the order for the construction project was signed last week by the representatives of the Porr consortium, joint venture partners from Italy and the CEO of the European Brenner Basetunnel project company.

The construction phase for lot H51 involves building two main tunnel tubes between Pfons and Brenner, around 9km of exploratory shafts, and the emergency stop and transfer point at St Jodok.

The two main, single-track tunnel tubes will primarily be driven with TBMs with an excavation diameter of 10.37m, at a rate of 30m a day per TBM. The excavation of the exploratory shafts will be realised with the drill and blast method and secured with shotcrete. The entire project will be supplied via a single access shaft.

The award of the tender for the largest construction lot in Austria’s history and construction works are expected to begin imminently.

It is expected that construction will take around six years with completion planned for 2024.

Porr CEO Karl-Heinz Strauss said: “We are exceptionally proud to have received the tender for Austria’s largest tunnel project to date. The 18km-long ‘Pfons-Brenner’ lot presents a genuine challenge in view of the complex geology and the restricted space available.

“You can only be charged with a construction project in the region of €1bn if you have the right skills and expertise – perfectly in line with the PORR philosophy”.

The Porr consortium, made up of T Porr Bau, G Hinteregger & Söhne Baugesellschaft, Società Italiana per Condotte d’Acqua and Itinera, has already built an exploratory and access tunnel for the Brenner Basetunnel.

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