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The new Orlovski Tunnel is designed to alleviate traffic congestion in Russia’s second largest city, St Petersburg. Measuring just over one kilometre long, the world's largest bored tunnel will allow traffic to flow freely without disrupting shipping on the Neva River. Some 60,000 vehicles are expected to pass through the tunnel daily when it enters service in 2016.
Grand investment for St Petersburg
The Orlovski Tunnel is an enormous investment for Russia as well as the city of St Petersburg. The cost estimate will be updated in the autumn of 2011 when it has been approved by the State Expertise.
COWI engineer on world's largest bored tunnel
The tunnel’s owners, Neva Ltd Concession Company and the City of St Petersburg, have selected COWI as engineer on the tunnel project.
The bored tunnel’s width of 19 metres makes it the world’s largest. To excavate this tunnel, a specially built tunnel boring machine will be built by Herrenknecht in Germany. The contract between Herrenknecht and the concessionaire was signed in July 2011.
The adjoining onshore structures include huge shafts needed for launch and retrieval of the tunnel boring machine and up to 50 metre deep excavations for the cut and cover tunnels.
Tight deadline for complex bored tunnel project
COWI's specialists are to examine the project’s documents and conduct an independent design assessment of the bored tunnel.
More specifically, this includes an engineering review, commenting on geological and hydro-survey findings as well as conducting independent structural calculations and verifying designs for the tunnel's ventilation and drainage systems.
Morten FaurschouProject DirectorTel: +45 56 40 13 email@example.com
Independent design check, independent design review, technical arbitror
Neva Ltd. Concession Company and the City of St Petersburg
Abu Dhabi, U.A.E. (pdf)
Cityring, Copenhagen metro, Denmark (pdf)
Malmø City Tunnel, Sweden (pdf)