- Client: Nye Veier AS
- Main contractor: Eiffage Génie Civil
- Contractor: Metrostav Norge AS
- Construction period: 01/2023 – 12/2024
- Price: 600 000 000 NOK excl. VAT
E18 Langangen-Rugtvedt, Grenland tunnel
The Grenland Tunnel, part of the E18 Langangen-Rugtvedt project, is 5.2 km long and serves as a bypass of city of Porsgrunn. Metrostav Norge AS is excavating two tunnels from the Kjørholt and Herregårdsbekken portals.
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 is being excavated from the Kjørholt portal in the south, the Herregårdsbekken portal in the north and two access ramps in the middle of the tunnel.
Metrostav Norge AS is excavating the 2 x 1,7 section of the Grenland tunnel from the Kjørholt portal and the 2 x 1,4 section from the Herregårdsbekken portal.
Project data
2 pcs, total 6 164
Tunnel:
T10,5 cca 80 m2
Tunnel profile:
520 418 m3
Excavated volume:
24 784 m3
Shotcrete:
40 471 pcs
Rockbolts:
2 547 096 kg
Grouting:
Challenges / Specifics of the project
- High requirements for work and environmental safety, and quality
- An extensive project
- Coordination with the contractors of other sections of the tunnel
- Predicted need for extensive grouting
Gallery
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