Innovative solutions for the tunnel renovation of the Bad Zurzach northern bypass
Die ERNE AG saniert die Nordumfahrung Bad Zurzach AG. Dabei setzt die Baufirma innovative Lösungen wie Komposit für die Abdeckungen von Kabelschächten ein. Der geringe Arbeitsplatz im Tunnel stellt eine Herausforderung dar.
Last year, ERNE completed the Bad Zurzach eastern bypass. Work is now underway on the tunnel renovation of the northern bypass, the Laufenburg-based construction company announced in a press release. ERNE is using innovative solutions for this project.
The press release cites cable and siphon shafts as well as cable shaft covers as examples. The former are not made from polymer concrete, as is usually the case, but from more robust ultra-high performance fibre concrete. The covers are made of composite material (composite). It is lighter and more corrosion-resistant than conventional cast iron.
The project includes the renewal of the verges with cable conduit system and extinguishing water pipes and a new tunnel coating. Two existing emergency exits will be rebuilt and supplemented with new emergency exits. In addition, the tunnel control centre will be rebuilt and two new stacking basins built. The project poses challenges due to the limited space available and the fact that work has to be carried out while the tunnel is in operation.
ERNE expects to have completed the ongoing work on the south side of the tunnel by mid-August. Following this, the half-sided traffic routing will be changed so that the north side of the tunnel can be renovated. The construction work is scheduled for completion in 2025.