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Thor Helical Remedial / Structural Solutions
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Project Spotlight - Crack Repair using Webac Injection resins


ICE Tunnel Crack Repair


Nine tunnels altogether with a total length of 27 kilometers have been built over the 89 km long rail route between Nuremberg and Munich , including six tunnels using the tunnel driving method and three tunnels using the cut-and-cover method. Injection tubes were installed in the construction joints during the tunnel construction. These were injected with PU Injection Resin WEBAC®1405 tested in accordance with ZTV-Ing and RiLi SIB upon completion of the construction work.

In some areas of the construction joints, rock pockets were noticed during the construction which were successfully filled and sealed. The construction joints were then patched in order to prevent the PU Injection Resin WEBAC®1405 from flowing out of the area of these weak points in an uncontrolled manner. Great demands were made on the patching material. As any subsequent removal of the material would be very time-consuming and costintensive, it must withstand the enormous pull caused by trains passing by at over 300 km/h.

This requires an extremely high adhesive tensile strength also on damp and wet surfaces. The high-grade  Epoxy Putty WEBAC®4525 which is characterized by its high adhesive tensile strength of over 5 N/mm˛ fulfills this requirement. Thanks to its ductile nature WEBAC®4525 proved to be the ideal patching material not only in terms of technical properties but also regarding its user-friendliness. PU Injection Resin WEBAC®155 and PU Injection Resin WEBAC®1405 were used for crack repairs in accordance with ZTV-Ing.

Thor Helical Remedial are the UK distributor for Webac products in the UK. We supply the entire Webac range of PU Injection Foam Resins, PU Injection Resins, Injection Gels, Epoxy Injection Resins along with all the pumps and and injection packers to meet your needs. Technical support is on hand both from our UK Technical Team and from Webac to help you specify the right products for your projects. Contact our sales team on 0845 400 6666 or e-mail salesdepartmentwykamol.com for more details.

26th January 2011, 10:42

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