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A platform for research: civil engineering, architecture and urbanism
Transition of Japanese road tunnels ventilation and smoke exhaust in tunnel fires
In 1958, the first ventilation facilities were installed in a road tunnel in Japan: the Kanmon tunnel which is an undersea tunnel 3,461 m in length. Since then, ventilation facilities have been developed adapted to conditions on inter-city expressways, urban expressways and ordinary roads. Today, there are many ventilated tunnels (more than 1,000) in Japan. The present study summarizes changes of ventilation systems, volume flow rates of ventilation, operation strategy of smoke exhaust, etc., since 1958. The first ventilation systems adopted were the transverse ventilation system based on the European method, and air supply semi-transverse ventilation systems were adopted in many inter-city expressways. The first longitudinal ventilation system using a jet fan was installed in the short (630m) Okuda tunnel, and the system has been studied since then. In 1979, the longitudinal ventilation system using electrostatic precipitators was introduced for use in long tunnels (over 3,000 m), establishing longitudinal ventilation as the main ventilation system in Japan. Task clarification of future ventilation systems based on these changes and their backgrounds, this research for example, will contribute to the development of effective and economic systems.
Transition of Japanese road tunnels ventilation and smoke exhaust in tunnel fires
In 1958, the first ventilation facilities were installed in a road tunnel in Japan: the Kanmon tunnel which is an undersea tunnel 3,461 m in length. Since then, ventilation facilities have been developed adapted to conditions on inter-city expressways, urban expressways and ordinary roads. Today, there are many ventilated tunnels (more than 1,000) in Japan. The present study summarizes changes of ventilation systems, volume flow rates of ventilation, operation strategy of smoke exhaust, etc., since 1958. The first ventilation systems adopted were the transverse ventilation system based on the European method, and air supply semi-transverse ventilation systems were adopted in many inter-city expressways. The first longitudinal ventilation system using a jet fan was installed in the short (630m) Okuda tunnel, and the system has been studied since then. In 1979, the longitudinal ventilation system using electrostatic precipitators was introduced for use in long tunnels (over 3,000 m), establishing longitudinal ventilation as the main ventilation system in Japan. Task clarification of future ventilation systems based on these changes and their backgrounds, this research for example, will contribute to the development of effective and economic systems.
Transition of Japanese road tunnels ventilation and smoke exhaust in tunnel fires
Yamada, Masahisa (author) / Kawabata, Nobuyoshi (author) / Kikumoto, Tomoki (author)
2014
8 Seiten, Bilder, Tabellen, 8 Quellen
Conference paper
English
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