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ACCIONA takes part in technical seminar entitled “Spanish civil engineering in the international sector”


The seminar organised by the Spanish Structural Engineering Association (ACHE) will be held in Madrid on 11 June

Fernando Vara, Railways and Tunnels Business Development Director, will present the Follo Line project

ACCIONA will take part in the technical seminar organised by the Spanish Structural Engineering Association (ACHE), entitled “Spanish civil engineering in the International sector”, which will take place in the Agustín de Betancourt Auditorium at the Civil Engineering Association of Madrid on 11 June.

The seminar will bring together experts that have spent a large part of their professional careers planning, constructing and managing infrastructures abroad.

According to the organisers, the aim of the event is to “Present experiences of major projects that span every field involving Spanish civil engineering abroad, in order to explain the opportunities and difficulties of working in other geographical regions that are also culturally different to Spain”.

The Follo Line project, which ACCIONA is currently carrying out near Oslo in Norway, will be presented during the seminar. The presentation will be given by Fernando Vara, who has been the Follo Line project Director and who is now Railways and Tunnels Business Development Director.

The Follo Line is the name of the new railway route that will connect the city of Oslo with the town of Ski in the country’s largest ever transport infrastructure project.ACCIONA completed the most important part of the project in early March, namely the double railway tunnel, which at 19.5 km long is the longest in Scandinavia.

A pioneering method in Norway was used to excavate the tunnels based on four double-shield tunnel boring machines (TBMs) that simultaneously drilled from a single starting point.The works also included the excavation of two caverns to assemble the TBMs using conventional methods, rescue tunnels, an escape tunnel and two transport tunnels.

The TBMs were 150 metres long and weighed 2,400 tons each, and were especially designed for the hardness of the Norwegian rock.Each one has excavated nine kilometres of tunnel, ten metres in diameter, and installed a total of 140,000 concrete segments that were manufactured at a plant next to the works site and transported into the tunnel on custom vehicles.

The Follo Line project is scheduled to be completed in December 2021. It will take passengers just 11 minutes to cover the 22 km between Oslo and Ski thanks to a route that will allow trains to travel at 250 km/h.

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