- Client: Nye Veier AS
- Main contractor: Eiffage Génie Civil
- Contractor: Metrostav Norge AS
- Construction period: 11/2024 – 02/2026
- Price: 218 885 179 NOK excl. VAT
E18 Langangen-Rugtvedt, Grenland tunnel
The Grenland Tunnel is part of the E18 Langangen – Rugtvedt project, a bypass of Porsgrunn, and spans 5.2 km, featuring water&frost protection, and concrete element installation.
Basic information
Project characteristics
The Grenland tunnel is part of the E18 Langangen – Rugtvedt project, which is 17 kilometers long and includes four lane highway, brigdes and tunnels. It forms the bypass of the city of Porsgrunn, which lies on the route of the E18 highway between Oslo and Kristiansand.
The Grenland tunnel itself, with a total lenght of 5,2 km was excavated from the Kjørholt portal in the south, the Herregårdsbekken portal in the north and two access ramps in the middle of the tunnel.
After the successful completion of the excavations, Metrostav Norge AS is carrying out work on waterproofing and frost insulation. In total, over 135 000 m2 will be insulated in the vault and walls of the tunnels. Over 67 000 m2 of concrete elements will be installed in the walls of the tunnels.
Project data
135 491 m2
Water and frost insulation:
130 751 m2
PE foam th. 45/50 mm:
4 740 m2
PE membrane:
67 177 m2
Concrete elements:
27 763 m
Traction pipes:
Challenges / Specifics of the project
- High requirements for work and environmental safety, quality and time schedule
- An extensive project
- Coordination with the contractors of other sections of the tunnel
Selection of our references
Tverrslag Skøyen, K2C
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