Rail News

Gallery: Follo Tunnel Breakthrough

Norway’s longest railway Tunnel, the Follo Line project, reached a milestone on 6 July 2016 at 4pm, when the breakthrough of tunnelling took place. Inside the Østfold Line main tube, the construction company Società Italiana per Condotte d’Acqua SpA and owner Jernbaneverket celebrated the event when tunnelling from the north and south met.

© Jernbaneverket

The tunnelling took place very near to an underground oil depot, making the project particularly sensitive. Surveying by Amberg Technologies AG delivered particularly accurate measurements, allowing for only 4mm of lateral deviation and no height deviation, the work progressed and delivered a “precision landing”.

The complex geometry of the construction, which began at an existing road tunnel at Oslo’s Sjursøya enabled two access tunnels to be bored through hard rock in the Ekeberg hill. The route included S-curves, 90° junctions and inclination up to 12% slope, and therefore required particularly high degrees of accuracy in the surveying and execution stages.

Related Post:  Visit Altro at the First Rolling Stock Networking Event

Amberg Norge AS, the Norwegian subsidiary of Amberg Group, supported three of the four lots of the Follo Line project. The project will yet present challenges, including the EPC Oslo Central Station, which requires a cut and cover construction, to be achieved in Oslo’s quick clay ground, as well as an EPC Tunnel Drill and Blast, which requires 3500mm of tunnel to be blasted through. There will also be an EPC Tunnel with four tunnel boring machines to complete the excavation works.

Thomas Sochert, Business Unit Manager of Amberg Technologies said:

“I am very proud of our key account Condotte and Amberg’s team. They have worked hard to achieve this target. It is good to see that they have proved themselves. Meanwhile tolerances are getting smaller and smaller, because we achieved this, but it is still a work of art, congratulations!”

The tunnel will begin operating passenger services in 2021. It is the largest transport project between Oslo and Ski taking place at the current time.

Related Post:  Visit Altro at the First Rolling Stock Networking Event

Follo Tunnel Breakthrough Gallery

News categories

    10 Mar 2017
    Government Minister Carmen Walker Späh Visits Amberg Technologies AG
    07 Mar 2017
    Amberg Technologies Nominated for RailTech Innovation Award 2017
    16 Dec 2016
    Amberg Technologies Presents New Tunnelscan Plus Product
    30 Sep 2016
    New Version of Amberg TSP Plus is Released
    21 Apr 2016
    Amberg Technology in SMP4 Exploratory Tunnel
    20 Nov 2015
    ITA International Tunnelling Awards Winners 2015
    05 May 2015
    Windhoff Receives Order for Two-Axle Maintenance Vehicles
    Subscribe
    Subscribe to Railway-News
    Get the latest contract alerts and Railway News emailed directly to your inbox.

    We respect your privacy and take protecting it seriously.

    Please tick to confirm you would like to receive emails we think may be of interest to you. We sometimes tailor the content you see to what we think you'll find interesting, and so monitor your interaction with our website and email content (find out more).