Major fire incidents in road tunnels with a larger number of casualties led to a discussion and measures to increase the safety in road tunnels. Technical evaluation of the various incidents showed, that the monitors typically installed for visibility monitoring and ventilation control gave early and reliable signals, indicating the start of a fire. In most cases, fire start due to technical reasons on the vehicles, such as defective engines, turbocharger, brakes, tires, etc. Such defects typically lead first to the development of cold smoke before an actual fire starts (in many cases, there's even no fire, just smoke). Such incidents remain invisible to CCTV and linear fire cables. In 2004, the Swiss Federal Roads Office (FEDRO) introduced the first draft of a standard for a suitable and reliable early fire warning detection system. Based on these recommendations, SIGRIST-PHOTOMETER was the first company developing and manufacturing a new smoke/fire detector fulfilling the requirements set by this draft, which eventually became the official standard in Switzerland in 2007. The Gotthard road tunnel was the first tunnel which was equipped with more than 200 Fire- Guard sensors. In the meantime, several tunnels in Switzerland, Germany, Spain, Norway, Sweden and Czech Republic have been equipped with this monitor. The presentation gives an overview about the major projects concluded in Switzerland and the practical experiences of early fire detection in road tunnels.
Early fire detection in swiss road tunnels with more than 1500 fireguard sensors
2014
7 Seiten, Bilder, 3 Quellen
Conference paper
English
Straßentunnel , Rauch , Schweiz , Brandortung , Ventilation , Deutschland , Spanien , Norwegen , Schweden , Turbolader , Feuermelder , Lüftung , Tschechien
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