County Road 32, Porsgrunn
For 30 years, discussion has raged about the bottleneck at Lilleelv intersection in Porsgrunn. AF’s creative solution hit the mark both with the client and the local population.
About the project
The design and build contract, which includes designing and constructing a new County Road 32 in Porsgrunn, is the largest road project in the Grenland city package.
NOK 236 million
Gimlevegen, 3915 Porsgrunn
Innovative solutions in Porsgrunn
County road 32 Gimlevegen-Augestadvegen (Lilleelv intersection) is the biggest road project in the Grenland city package. The project will be executed as a turnkey contract and includes planning and building a new county road between the railway and residential area. The soil mechanics are challenging, and the Norwegian Public Roads Administration asked for the contractors' proposals for a technical solution. AF Gruppen and Norconsult have collaborated closely with the NPRA through the procedure for competitive dialogue to develop the technical solution.
The contract was signed in December 2015 and the time up to March has been spent on coordination, design, application processes and rigging.
AF secured the contract for the project in competition with three other bidders through a so-called competitive dialogue. AF’s solution is a so-called “top-down” method, in which a waterproof structure is constructed from ground level.
The method is relatively unknown and the combination of load-bearing sheet piling with adjoining jetted piles has not been carried out on such a large scale before.