一种基于斜坡单元的山区城镇地质灾害高危险坡段识别方法

地质灾害高危险坡段的识别对山区城镇防灾减灾具有重要意义。以山西省石楼县城区为例,采用层次分析法对石楼县城区斜坡开展地质灾害危险性评价,初步确定出14处高危险坡段。再利用Geostudio软件对初定的高危险坡段开展稳定性计算,进一步识别高危险坡段范围,最终将11处斜坡段内出现整体不稳定或局部不稳定的坡体定为高危险坡段。经过ROC数据曲线验证,识别出的11处地质灾害高危险坡段较为合理。该方法既弥补了GIS分析法缺少岩土体物理力学参数参与计算的不足,又缩减了逐坡段计算斜坡稳定性的分析时间,提高了高危险坡段的识别效率。

Entification Method of High-Risk Slopes of Geological Disaster in Mountain Towns Based on Slope Unit

The identification of high-risk slopes of geological disaster is of great significance for disaster prevention and mitigation in mountain towns.In this paper,taking Shilou county town in Shanxi Province as an example,the analytic hierarchy process is used to carry out geological hazard assessment on the slopes of Shilou county town,and 14 high-risk slopes are initially identified.The stability calculation of the initial high-risk slopes is carried out using Geostudio software to further identify the range of the high-risk slopes,and the slope with overall instability or local instability in 11 slope sections is finally designated as the high-risk slopes.After the ROC data curve verification,the 11 identified high-risk slopes of geological disaster are more reasonable.This method not only makes up for the lack of GIS analysis method to participate in the calculation of physical and mechanical parameters of rock and soil mass,but also reduces the analysis time of slope by slope stability calculation,and improves the identification efficiency of high-risk slopes.