dcsimg Hollowing mountains - Ramboll Group
     
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Hollowing mountains

If you don’t believe in moving mountains, there is another way to deal with them – hollowing.

Ramboll is doing just that several places in the world, one of the most spectacular projects being in the Oslo suburb of Holmestrand, Norway.

 
 

By Michael Rothenborg

The Norwegian National Rail Administration is having a double track designed from Holmestrand to Nykirke, a distance of almost 7 km, a mere 400 metres of which will be outside the mountains.

The station interior will be designed to allow high speed trains to pass through the station at 250 km/hour – with passengers waiting on the platforms. This is the first project of its kind and requires painstaking attention to air pressure, wind speed, noise and the management of fire and security systems.

Special care must also be taken to focus on more stringent groundwater control measures, as both the tunnels and the station will be located under urban areas on the Holmestrand plateau.

The project is interdisciplinary, and Ramboll is preparing detailed planning, a zoning plan and a building plan and design, including tender documents.

Photo: Katinka Hustad