Cityringen - Extension of the Copenhagen Metro / Cityringen - Ausbau der Metro Kopenhagen

The Cityringen project will link the historic old city centre of Copenhagen with the outskirts and provide rapid and safe transport for 240,000 passengers per day. The existing Metro network will be extended with 17 new stations with average dimensions of 65 m × 20 m. Two single-track tunnels each 15.5 km long and 5.50 m diameter will be bored by altogether four EPB-TBMs working at the same time. In addition, three construction and ventilation shafts, a ramp structure and subsidiary structures are to be constructed.
An introduction to the project will be followed by a report of the current state of the design and construction works. Particularly worth mentioning are the extensive dewatering measures at the shafts and station structures. Another important point is the dense monitoring programme provided for the reliable control of the construction works. The various geotechnical and geodetic sensors and measuring systems are also described and also the largely automatic recording, transmission and processing of the data. We then show how an automatic tunnel information system can link high-quality measured data with many other sources of data and information about construction progress and make it available over the Internet to ensure continuous safety of the construction works through risk management.