Breakthrough at Copenhagen

10 February 2015

DENMARK – The two Copenhagen Cityringen TBMs broke through last month. The site, located some 30m below an existing historical train station, hosted a visit by Danish prime minister Helle Thorning-Schmidt.

The driverless metro project will be completed in 2019. The TBM-excavated route has an id of 4.9m.

The contractor responsible for civil construction work is the Copenhagen Metro Team JV comprising Salini Costruttori, Tecnimont and Seli. The client is Metroselskabet. Cowi, Arup and Systra handled vibration analysis as well as all other design and engineering works.

The ground conditions along the alignment of Cityringen comprise a quaternary sequence of meltwater sands and tills resting on Danian limestone. The quaternary deposits are overlain by fill as well as post- and late-glacial deposits. Deposits belonging to the Selandian (Middle Palaeocene) greensand formation are also found locally subjacent to the quaternary deposits.