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公路黄土崩塌灾害在陕北黄土地区多发、易发,给当地公路交通建设和运营造成严重危害。结合陕北S302(榆林至佳县)沿线典型路段黄土边坡的现场调研,研究公路崩塌灾害简易快速评价方法,对灾害科学评判及减灾具有重要的工程意义。首先,分析了影响黄土崩塌灾害的因素,并通过专家咨询法和相对比较评分法提取了4个关键因子作为识别指标,即破坏阶段、坡度、崩塌规模和坡高;其次,给各个识别指标赋以相应权重,对公路黄土崩塌危险性进行初步综合评价,并以K66+100~K66+650路段为例进行实例检验,为快速识别评价公路黄土崩塌提供了一种方法。
The highway loess collapse disaster is prone to occur in the loess area of northern Shaanxi, causing serious damage to the local highway traffic construction and operation. Based on the field investigation of typical loess slopes in S302 (Yulin-Jiaxian County) of North Shaanxi Province, a simple and rapid method of evaluating highway collapse hazards is proposed, which has important engineering significance for disaster scientific evaluation and disaster reduction. Firstly, the factors affecting the disaster of loess collapse are analyzed. Four key factors are extracted as the identification indicators through expert consultation and relative comparative score method, namely, the damage stage, slope, scale of collapse and slope height. Secondly, With the corresponding weights, the preliminary comprehensive evaluation of highway loess collapse danger is carried out, and the case test is carried out by taking K66 +100 ~ K66 + 650 road sections as an example to provide a method for rapid identification and evaluation of highway loess collapse.