All Stories

Constructing three new subsea tunnels

Haramsfjord tunnel (3.5 km), Nogvafjord tunnel (5.7 km) and Fjortoftfjord tunnel (3,7 km) in the Nordoyvegen tunnel project is a few steps closer to construction. The tunnels were initially planned with a 10 percent incline, but later reduced to 7 to 8 percent due to a growing awareness to the fire hazard in steep subsea tunnels. The tunnels are still steep and need special attention when deciding the right safety systems, equipment and other safety measures. Reducing risk for fire is a high priority issue for these tunnels.

Constructing three new subsea tunnels

Tenders ready for longest road tunnel in the world

Already in the autumn of 2017, the first tenders will be announced in the longest and deepest road tunnel (subsea) construction in the world. The tunnel starts in Harestad (south) to Arsvagen (in north), and will be over 25 kilometers long. In addition a 2 kilometer ramp up to Kvitsoy will be build. E39 Rogfast is an important step in the development of the coastal road between Kristiansand and Trondheim. E39 coastal road is part of the overall transport network in the country. The coastal road is about 1000 km. This represents one-seventh of the total main road network in Norway.

Tenders ready for longest road tunnel in the world

Only one offer on 26.5 km subsea tunnel

The Kvitsøy contract is described as the most technically challenging of the three Rogfast contracts to be announced. There will be a 20.6 km tunnel, 4.5 km of road and five new bridges on Kvitsoy, and in addition two 250 meters ventilation shafts with a diameter of ten meters drilled down to bthe main tunnel under Kvitsoy (illustration: Norconsult/ Statens vegvesen).

Only one offer on 26.5 km subsea tunnel

New tunnels connecting the Faroe Islands

A total investment of around 260 million Euros, which is by far the largest single investment ever made in the Faroe Islands, will be invested in two new tunnels.  The Eysturoy tunnel – will be 7.1 km long and will connect the largest bay in the Faroe Islands, Skálafjørður, directly to Tórshavn. The longer tunnel will be 10.6 km long and will connect the island of Sandoy, which is currently only accessible by ferry, to Tórshavn.

New tunnels connecting the Faroe Islands

Longest and deepest soon ready to open

The Ryfylket tunnel will be completed in 2019 and will provide connection between small communities and the large city municipality of Stavanger, Norway. A large population travel daily by ferry, and will in the future travel through this 50 km long tunnel project, consisting of three main tunnels. 

Longest and deepest soon ready to open

Seeking the final approvals for the Fehmarnbelt fixed link

The Fehmarnbelt tunnel is set to become the world’s longest combined car and rail tunnel. There is still approvals missing before the project is finally approved by all authorities. The German government approval of the Fehmarnbelt link is expected by mid 2018 according to the Danish Ministry of Transport, Building and Housing. 

Seeking the final approvals for the Fehmarnbelt fixed link

Improved safety concept in new Fréjus tunnel

The Fréjus Road Tunnel is a bidirectional single tube tunnel that connects France and Italy and runs under the Cottian Alps between Modane in France and Bardonecchia in Italy. The tunnel represents major challenges when it comes to tunnel safety, not at least because of the steep climbs up to the tunnel, and most of the 200 professionals working in Fréjus tunnel are taking care of public safety on a daily basis. Opening up a second tunnel tube for traffic will improve safety significantly for this high-risk tunnel between Lyon and Torino.

Improved safety concept in new Fréjus tunnel

Amazing bridge/tunnel tourist attraction

The Hardanger bridge & tunnels opened 17 August 2013. The bridge is a two-lane suspension bridge with walking and bicycle paths. The bridge has a main span of 1,310 meter and a total length of 1380 meter. The bridge goes into the mountain on both sides of the fjord. Both tunnels have roundabouts. One of the tunnels, Vallaviktunnelen, is 7.5 kilometer long.

Amazing bridge/tunnel tourist attraction

Breakthrough in the longest subsea tunnel in the world

The last drill and blast is done and there is now access from both sides in what will be the longest subsea tunnel ever build. The Ryfast project is the historical largest road project in Norway, and it's more than five years since construction work started. Opening of the tunnel is towards the end of 2019. 

Breakthrough in the longest subsea tunnel in the world
Image

About us

Global news about road tunnels and technology in an operational perspective.

Tunntech AS

Markaneset 24a, 5251 Soreidgrend, Bergen, Norway

T: +(47) 950 88 793 • E: editor@tunntech.no