Shotcrete, in-situ concrete and lining segments
Time-saving and safe reinforcement
Regardless of whether a tunnel is being driven by mined exavacation (NATM) or by tunnel boring machine (TBM), KrampeHarex supports tunnellers in all aspects of reinforcement work by providing the necessary know-how, technical solutions and services – all from a single source. Our range includes a wide variety of fibre types for all project-related demands on the concrete. On request, we can also assume responsibility for assuring the quality of the sprayed concrete, in-situ concrete or tubbing segments.
Based on our many years of experience, we combine reinforcement and fire protection in an optimal manner. On the basis of structural and fire protection calculations, we determine the safest and most economical fibre content for you. By choosing KrampeHarex as your partner, you can rely on optimised fibre concrete and rapid construction progress.
Because we know why.
"Fibre reinforced concrete is THE building material of the future. Its innovation potential is far from exhausted."
Wilhelm Nell
Business Unit Director Fibres
We let projects speak for themselves -
References from the tunnel construction sector
Tunnel construction around the globe
Experience in the field with KampeHarex
Reinforcement with fibres from KrampeHarex copes with these load conditions better than conventional reinforcement in the form of tubbing segments does.
Faster stripping of the lining segments
The tubbing segments can be stripped after just 6 hours. This increases production performance.
Space-saving storage
As the fibres are uniformly distributed in the components, up to 7 tubbing segments can be stacked on top of each other without any risk of breakage.
Transport with less damage
Thanks to the uniform distribution of the fibres, the tubbing segments are also more stable against vibration and impact shocks during transport.
High stability during installation
When installing with the aid of a tunnelling machine, high loads act on the components. Here too, the stability of fibre concrete is an advantage.
Extremely rugged
After installation, a wide variety of forces act on the tubbing segments. This is where fibre concrete proves to be extremely durable and resilient.
Wilhelm Nell about:
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.
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
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Christian Braun
Projectmanagement Tunnel construction & Mining
