一、引言 为了防止和减轻泥石流对既有铁路的危害,近几年来,我们对局管内泥石流沟进行了多种型式的工程治理,有了一定收效。但是对于那些暴发频率虽低、而一旦暴发却难以控制的泥石流沟,采用工程治理不仅规模大,投资多,涉及面广,而且往往无法使之完全抗灾,这就需要从运营的角度上考虑灾害预防的问题,以保证在泥石流临近发生或发生之后,及时检 I. INTRODUCTION In order to prevent and mitigate the damage to the existing railway caused by debris flows, in recent years, we conducted various types of project management of debris flow ditches in the bureau tube and achieved certain results. However, for the debris flow ditch which has a low frequency of outbreaks but is hard to control once the outbreak occurs, it is not only large in scale and large in investment but also extensive in its coverage, which often can not make it completely disaster-resistant. Therefore, it is necessary to consider disasters from an operational point of view Prevention issues to ensure that in the debris flow near or after the occurrence of timely inspection