前言 成昆线北段泥石流的发生,由来久远。它对铁路建筑物危害程度而言,重者毁桥翻车,车破人亡,轻者堵涵漫道,中断行车,是运输生产中的一大隐患。为此,在有害设防,防患于未然的原则下,从区域形成条件,和单沟形成因素进行综合趋势分析,从中预测泥石流暴发的软信息,及时采取防治措施,已成为研究铁路沿线泥石流的应用性课题之一。 Foreword Cheng Kun line debris flow occurred in the northern part of the long history. Its degree of harm to the railway buildings, heavy to destroy the bridge overturned, the car died, the light blocking Han Man Road, interrupt traffic, is a major hazard in transport production. Therefore, under the principle of detrimental fortification and preventive measures, a comprehensive trend analysis based on regional formation conditions and formation of single ditch is made. From this, soft information of debris flow outbreak is predicted and timely prevention measures are taken to study the debris flows along the railway One of the practical issues.