隧道为各类地质工程构造物中耐用性最佳的一种，服务生命周期常可达百年以上，近年来隧道损害事件却时有所闻。文章针对台湾中部横贯公路因上边坡崩塌而压毁隧道案例，探讨灾害路段的应急处理过程，并针对沿线进行大比例尺现地地质调查，探讨灾害类型、致灾原因以及其工程地质特性的相关性，最后简述台湾山区公路近期推动的易致灾路段评估与灾害控管计划概念。

Tunnel is one of the most durable structures in all kinds of geological engineering structures, which often has one hundred years or more service life cycle. However, there are more and more cases about tunnel damage in recent years. In this paper, we used a case study of tunnel failure caused by upper slope instability in Central CrossIsland Highway in Taiwan to discuss the process of emergency treatment in disaster area. We did some largescale field geological investigation along the road to explore the relevance of the reasons which caused disaster and the engineering geological characteristics. Finally we made some brief description on the assessment of disasterprone area and the concept of disaster control that had been promoted recently in mountain highway in Taiwan.