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- Fastening success in the longest Stuttgart 21 tunnel
The fastening specialist fischer developed and delivered a new system solution for installing the overhead lines in the Filder tunnel, which is being developed as part of the Stuttgart 21 project. The fastening innovation met all project-specific requirements.
After completion on the newly constructed Stuttgart-Ulm high-speed line, the approximately 9.5 kilometre long Filder tunnel will connect Stuttgart’s main train station in “Kessellage” with the Filder level. The underpass will cover an altitude of around 153 metres. At almost 9.5 kilometres, the Filder Tunnel will be the longest double-tube railway tunnel and the third longest tunnel in Germany. The developer is DB InfraGo AG, formerly DB Netz AG (Frankfurt am Main). SPL Powerlines Germany GmbH (Forchheim) - part of the Powerlines Group with decades of experience in the field of railway electrification - is commissioned to plan and carry out overhead line installation.
The fastening expert fischer developed the ideal system solution for attaching steel and aluminium attachments for the installation of the overhead lines in the filter tunnel. The reaction cartridges FHB II-PF and the high-bond special mortar FIS HB 360 S together with the high-bond anchor rods FHB II-A S and the Fischer filling set for dynamic loads anchor the add-on parts permanently and securely in the reinforced concrete supports. The fischer system components were used in stainless steel (R) versions in the sizes M24 x 170/50 R (640 units), M20 x 170/50 R (1,532 units) and M16 x 95/60 R (4,180 units).
"In addition to the project, we included the useful life of our chemical fastening system of 100 years and fastening in diamond-drilled holes in the European Technical Assessment (ETA). With its very fast curing time, our injection system is also predestined for installation on the tunnel ceiling and wall. The system solution is also suitable for dynamic effects from train traffic, taking into account a distance installation due to the tunnel curvature," explains Reinhold Pfaff, developer in the fischer Business Unit Chemistry, who supported the project. “This means that all the requirements of the building owner and our customer for the fastening means are fulfilled.”
In addition to the right product solution, we also impressed the building owner and our client with our many services. These included the selection and dimensioning of the fastening system, as well as installation training and on-site implementation support.
Verification of the dynamic suitability is certified by a report from Prof. Dr.-Ing. Jan Hofmann, Dean of the Faculty of Civil and Environmental Engineering, Professor of Fastening Technology and Reinforcement Methods at the Institute for Materials in Construction and Deputy Director of the Materials Testing Institute at the University of Stuttgart. The technical consulting department in the in-house department of the German sales company of the fischer Group provided computational proof of overall suitability. And the fischer Chemicals business unit also made the construction project possible through experiments, technical development and coordination with the expert.
Mirjan Bubser, Head of Application Technology in the in-house department at fischer Deutschland, emphasises: "In addition to the right product solution, we also impressed the building owner and our client with our many services. These included the selection and dimensioning of the fastening system as well as installation training and support for the implementation on site." Mirjan Bubser, who was also responsible for the project, emphasises: “The success of the project was made possible by the very good cross-departmental cooperation of our company, in particular in the areas of Industry/OEM Sales, Technical Consulting in the in-house department of the German sales company and the development of the Chemicals Business Unit.”
