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Following on from the refurbishment of the Sachseln Tunnel, which cablex reported about in July 2019, the Soliwald Tunnel will be renovated this year. Various tunnels along the A8 motorway are being upgraded for safety reasons under the auspices of the Federal Roads Office ASTRA. cablex is planning and implementing the technology in the new escape tunnel and installing the new passageway and adaptive lighting.
cablex is planning and implementing all operational and safety-relevant facilities in the escape tunnel as well as the operating and ventilation stations.
Work on the 560 metre-long Soliwald Tunnel, which was built in 1995, began in spring 2019. In order to increase safety in the tunnel, an emergency exit providing a possibility to escape into the open air was additionally installed in the middle. This new rescue tunnel was cut in November 2019. In an emergency, the emergency exit takes escapees to an exit portal via a 200 metre-long rescue tunnel.
The operating room for the technical installations and ventilation control station are also located in the rescue tunnel. Teams from the Infrastructure business unit have been on site for cablex since the end of April 2020 to prepare for and also carry out the cable pulling and laying activities. A sub-contractor was commissioned to install raised flooring in the operating room. cablex will supply the operating room's new switch cabinets and its technicians will connect them. In addition, they will install the lighting (LED) throughout the entire escape tunnel.
However, cablex is not only responsible for the lighting in the escape tunnel, but also for the lighting in the tunnel itself. Here, the company is installing the new passageway and adaptive lighting, including cabling (supply cable) and photoluminescent escape route markings, and it is also fitting the emergency exit's sliding escape door.
The adaptive lighting is being installed at the entrance and exit areas of the tunnel. This helps drivers' eyes to become accustomed to the lighting conditions in the tunnel. A sensor (luminance sensor) on the tunnel portal measures the intensity of daylight and adjusts the lighting in the first tunnel section accordingly. This allows eyes to better accustom themselves to the passageway lighting, which is darker compared to daylight (adaptation).
The installation of the new adaptation and passageway lighting is based on a substitution concept. This means that the new lighting is being installed parallel to the existing lighting. As soon as the work has been completed and the switchover to the new lighting installation has taken place, the original tunnel lighting, which has been in place since 1995, will be dismantled.
In an emergency, passengers can escape from the Soliwald tunnel into the open air via the newly constructed escape tunnel. cablex is planning and implementing all operational and safety-relevant facilities in the escape tunnel as well as the operating and ventilation stations.