In Scandinavian hard rock conditions, most tunnels are excavated by drill & blast technique (at Triangeln Station in Sweden, for example, or in the refurbishment of Päijänne Water Tunnel, Finland). In softer rock, other excavation methods such as road headers is an alternative.
The development of modern Tunnel Boring Machines (TBM) has made bored solutions attractive, especially for long continuous tunnels, for a variety of rock conditions. The Hallandsas project has shown how TBMs can overcome even the most challenging water-bearing, mixed ground conditions. With our home in Scandinavia, we are experienced in all types of hard rock tunneling - including continuous pre-grouting to exclude water inflows and the Q-system.
Ramboll is giving expert advice in how to build a railway tunnel, and how to improve the punctuality and the frequency of future rail traffic in Stockholm.
Ramboll has been an advisor in planning the new Steinberg tunnel near the city centre of Trondheim, Norway. The project required adjustment to a complicated urban situation as the road had to be linked to the existing road network. In addition to this, a railway and a tramway had to be taken into consideration.
Ramboll participates in planning the development of European road E18 to safeguard a sufficient and comprehensive service level on this most significant international road connection in Finland. The route connects the growing areas in southern Finland with the metropolitan area and the important export trade terminals. Finland is committed to upgrade the whole E18 road to motorway level by 2015.
Ramboll is engaged as the main consultant on the stretch of the new E18 motorway between Grimstad and Kristiansand. The new motorway will significantly improve the Norwegian infrastructure and will improve living conditions for local communities living along the existing road.
Supervision of the refurbishment of the worlds’ longest rock tunnel that carries water to the capital of Finland. Finland’s Päijänne Water Tunnel (constructed in 1972) is the world’s longest continuous rock tunnel and provides Helsinki and surrounding cities with pure water from Lake Päijänne in central Finland.
The population in Western part of Sweden is growing and capacity problems on the railways in and around Gothenburg are increasing.