Project information
| Project: | Metro Cityringen |
| Location: | Copenhagen, Denmark |
| Application: | Tunnel construction (Fire protection) |
| Type: | In-situ concrete |
| Concrete: | C 30/37 |
| Fibre type: | PM 6/18 |
| Fibre dosage: | 1.5 kg/m³ |
| Total amount of concrete: | 12,000 m³ SFRC |
A new railway system for Denmarks capital
Cityringen Metro
Cityringen Metro is the largest construction project in Copenhagen since the construction of Christianshavn in the middle of the 17th century.
Cityringen is a completely new subway section located in the center of the Danish metropolis. The construction project consists of 17 new underground stations and a 30 km long tunnel. Both the tunnel and the stations are located below groundwater level, which significantly increases the demands on the concrete.
The total tunnel length, which was dug using 4 tunnel boring machines, will be approx. 30 km. To line the tunnel tube, 125,000 prefabricated tubbing segments are being used, in which steel fibres from KrampeHarex have been processed.
“Our fibres save lives. That is a fact.”
Christian Braun
Project management Tunnel construction & mining
Fire protection in tunnels
A hot topic
Preventive fire protection has gained in importance in tunnel construction. New concepts demand that the concrete itself has a protective effect. This is made possible by adding synthetic fibres, because these reduce or prevent explosive concrete spalling.
Our polypropylene fibres are the result of many years of research and development. Their fire protection properties have been tested in collaboration with institutes like the Leipzig Institute for Materials Research and Testing (MPFA Leipzig GmbH), and the fibres have already been used in pilot projects like the Leipzig City Tunnel.
without PP fibres
with PP fibres from KrampeHarex
Wilhelm Nell on
Polypropylene fibres for fire protection in tunnels.
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Beim Aufruf des Videos werden personenbezogene Daten (IP-Adresse) an den Betreiber des Videoportals gesendet. Daher ist es möglich, dass Zugriffe gespeichert und ausgewertet werden. Detaillierte Infos finden Sie in unserer Datenschutzerklärung.
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Christian Braun
Projectmanagement Tunnel construction & Mining
