Project information
| Project: | City-Tunnel Leipzig |
| Location: | Leipzig, Germany |
| Application: | Tunnel construction (Fire protection) |
| Delivery period: | 2007-2008 |
| Concrete: | C 50/60 |
| Fibre type: | PM 6/15 |
| Fibre dosage: | 2 kg/m³ |
City-Tunnel Leipzig
Germany's first railroad tunnel with a new fire protection concept
The Leipzig City Tunnel is a twin-tube railroad tunnel that was built under the city center using TBM tunnelling as part of the redesign of the Leipzig railroad junction.
The focus is on the railroad line, which was completed in 2013 and connects the historic Leipzig terminus station with the former Bavarian station underground. The tunnel route measures 3.2 km and has four stations.
Deutsche Bahn and the Free State of Saxony, as joint builders, used synthetic fibers for the first time for the fire protection of the concrete surfaces. Since then, this technology has been standard in all new German (railroad) tunnels.
“Our fibres are used in two single-track tunnel tubes with an outer diameter of 9 m and a length of 3.9 km”
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
