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Cityringen will open in 2019

Preliminary surveys

Data from geotechnical drilling along the Cityringen alignment were used to calculate how much earth pressure tunnels, stations and shafts could withstand. In addition, trial pumpings from the water-bearing layers in the subsoil have shown where the water-bearing layers are located and how deep into the subsoil the effect of the construction work can be traced. This has helped prevent damage to buildings in the area.


Particularly vulnerable structures are measured and photographically registered in order to precisely determine whether construction work will affect the structures around it. The excavation of so-called injection wells, subterranean pockets filled with a stable material, helps ensure that the drilling of the tunnels affects the surrounding terrain as little as possible.


The final stage in the preliminary survey work were archaeological excavation. At a number of sites, particularly at the city core, archaeologists from the Museum of Copenhagen were following the first phase of construction (see below) in search of prehistoric finds and cultural artefacts that could teach us more about the history of Copenhagen.


Changes in the city’s utlility grid were the first and most visible signs that Cityringen was becoming a reality. Supply lines for water, electricity, gas, district heating and telephone services were affected. To make room for the actual construction of Cityringen, around DKK one billion worth of utility grid supply line rerouting was completed. The work of constructing tunnels and stations began once the grid had been modified to accommodate Cityringen.


The establishing of the construction sites and the construction of the stations started in 2011. In 2013 the four tunnel boring machines, Eva, Minerva, Nora and Tria, began boring the 31 km tunnel (2 x 15,5 km). The boring will be completed in the winter of 2016/2017. Meanwhile, the stations have been dug out and are now being constructed.

The last phase will be the refurbishment of the areas around the new stations. Station areas, road surfacing and fittings, such as signs and lighting, will be re-established starting from 2017. Meanwhile, Cityringen will be test run until its opening in July 2019.

The extension to Nordhavn will open in the winter of 2019/2020, and the extension to Sydhavn will open in 2023.


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