基于层次分析法的城市斜坡稳定性评价——以贵阳市云岩区为例

Evaluation of urban slope stability based on analytic hierarchy process(AHP)——Take Yunyan district of Guiyang as an example

本文以遥感、地面调查、无人机调查和测绘为主要手段,结合已有的资料对研究区内城市斜坡稳定性的影响因素进行了分析,以地形坡度、坡向、地质构造、工程地质岩组、地质灾害现状、人类工程活动强度等指标作为评价指标。采用层次分析法确定各评价指标权重,利用GIS平台上的空间分析工具对各图层进行栅格化处理并进行叠加分析,最后利用自然不连续点将研究区城市斜坡稳定性划分为好、较好、差三个等级。

This paper analyzes the influencing factors of urban slope stability in the study area by remote sensing, ground survey, UAV and surveying and mapping, with referring to the existing data. The terrain slope, slope direction, geological structure, engineering geological rock group, the status of geological disasters, and the intensity of human engineering activities are used as evaluation indicators. Analytic Hierarchy Process (AHP) is used to determine the weight of each evaluation index, the layers are rasterized and superimposed by using the spatial analysis tools on the GIS platform. Finally, natural discontinuity points are used to divide the slope stability risk in the evaluation area into three levels:good, average and poor.