Abstract：Research purposes: For the sake of the development of the traffic infrastructures in China，more and more long traffic tunnels are built. Therefore，prevention of disasters inside tunnels becomes one of the most important research topics.
Research methods: In this paper, the researches and designs on disaster preventions of long traffic tunnels made in China and foreign countries are presented in respect of causes for and damages of fire disasters and disaster prevention technologies. The results of researches on tunnel disaster preventions and their applications are summarized in the paper in respect of fire-resistance technology of tunnel linings，safe evacuation technology，fixed fire extinguishing technology，ventilation and exhaust-air releasing technology，fire detecting technology，vehicle guiding technology in case of fire and regional traffic management technology.
Research conclusions: Lacking of consistency，the researches made in China on disaster preventions of long tunnels are lagging far behind those made in foreign countries. The disaster prevention designs of long tunnels in China have many problems，such as insufficiency in researches and designs of disaster resistance of tunnel linings，great random in design of vehicle evacuations，poor rescuing systems during operation stages and poor tunnel management levels. It is hoped that the paper can make some contributions to the sustainable development of the disaster-prevention designs of long traffic tunnels in China.
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2007, Vol. 24 
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