Damage in Connection With the Installation of Swellable Profiles
Credit/Quelle (4): D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
Credit/Quelle: D. Mähner
When traffic tunnels are retrofitted to modify escape routes and operational equipment, it may be necessary to make subsequent additions to the existing tunnels in the form of new recesses or cross-passages. The following report details damage to the structure resulting from such work.
Initial situation
As part of operational retrofitting work on a road tunnel, an escape tunnel was constructed and connected to the existing main tunnel via cross-passages. In addition, new recesses were created to accommodate fire hydrants (Figs. 1 + 2).
To construct the structure, openings were cut into the existing inner and outer linings using a wire saw. This was followed by excavation, and the area was secured using reinforced sprayed concrete. Once the excavation and stabilisation work had been completed, the new inner lining was produced. To this end, anchor bolts (diameter 25 mm, spacing...
