公路地质灾害危险性综合评估方法探讨

以某公路改建工程为例,探讨了公路地质灾害危险性综合评估方法。在综合评估中,以公路沿线地质灾害灾种数、灾害点平均密度、灾害分布长度比例3个指标作为定量评价的量化指标,结合现状评估与预测评估的结果对公路沿线进行危险性等级分区。与传统定性分析分区相比,采用量化指标结合定性分析进行分区,结果不仅合理、切合实际,还体现了“区内相似、区际相异”的评估原则,在类似公路地质灾害危险性综合评估中具有参考价值。

Study on Synthetic Estimation Method of Road Risk Assessment of Geological Hazard

The synthetic estimation method of road risk assessment of geological hazard was discussed based on a practical hignway rebuilding project.Three index,the number of geological hazard category,average density of geological hazard point and distribution length of the geological hazard were chosen as quantitative index for quantitative estimation.Combined with the results of present and predictive estimation,the area along the highway was divided by hazard rank.Contrast to the traditional qualitative analysis,the section divided by hazard rank are more reasonable,practical,and following the assessment principle that "similar within section and different out section" as well.This method can be used as reference in synthetic estimation of geological hazard assessment in similar practice.