Jakarta, goldensamoyed Indonesia
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Norway is working on an ambitious project, namely development
tunnel
the longest and deepest underwater road in the world.The project, called Rogfast, aims to drastically cut travel times between major cities and create a ferry-free highway along the country’s west coast.
Rogfast, short for Rogaland fastforbindelse, is designed to be 27 kilometers long and located up to 392 meters below sea level, making it the most extreme highway tunnel in the world.
Rogfast construction began in January 2018. Having stopped at the end of 2019 due to cost overruns and project restructuring, construction resumed at the end of 2021. This giant project is scheduled for completion in 2033 with an estimated cost of around 25 billion Norwegian kroner or around IDR 41 trillion.
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The tunnel will consist of two separate tubes, each with two lanes of traffic.In the middle of the tunnel, a double roundabout will be built connected to the connection tunnel to Kvitsøy Island.
Building such a long structure under the sea poses extraordinary technical challenges.Both ends of Rogfast were built simultaneously to save time, so the challenge was to ensure both construction teams could meet in the middle with high precision.
“Careful measurements using lasers and other sophisticated equipment are used to detect even the slightest inaccuracies,” it said.
goldensamoyed
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The rotating mirror laser scanner can even measure newly excavated tunnel sections and collect two million data points per second to create a “digital twin” of the tunnel.
Anne Brit Moen, project manager at Skanska, called Rogfast one of the most ambitious and technically demanding developments.”The main challenge so far has been finding a grouting method that is good enough to seal the stone,” Moen said.
Rogfast is also designed to be air pollution free with a longitudinal ventilation system installed along its length to ensure effective air circulation and safety throughout the entire length of the tunnel.Additionally, cameras and radar will monitor vehicles to provide real-time incident warnings, such as breakdowns or traffic jams.
Cut Travel Time in Half
The Rogfast project is a crucial part of the overhaul of the E39 coastal highway stretching from Trondheim to Kristiansand.Currently, the journey takes up to 21 hours by relying on a ferry.
With the presence of Rogfast, travel time will be cut in half and eliminate the need for ferries.Daily access will also be much easier;Two big cities in Norway, Bergen and Stavanger, can be reached in just 40 minutes.
“The tunnel will significantly improve connectivity along the west coast of Norway, by creating a faster and more reliable link between the Stavanger and Haugesund regions,” said Anne Brit Moen.
Although predicted to reduce ferry operations and potentially eliminate some related jobs, Rogfast is claimed to strengthen access to new jobs, education and public services for local communities.Moen believes this project will create a positive effect on the local economy, including the seafood industry, as logistics costs will decrease.
For information, currently the title of longest underwater tunnel in the world belongs to the Seikan Tunnel in Northern Japan, which is a special railway tunnel with a total length of 53.85 kilometers.
(ana/wiw)
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