基于多因素的滑坡发育规律与成因分析——以某山区滑坡为例

Development Law and Cause Analysis of Landslides Using Different Features:A Case Study of a Mountain Area in the Yunnan-Guizhou Plateau

南方山区地区是滑坡高易发区,特别是近几年南方地区极端天气频发,进一步加剧了滑坡的发生。为研究南方地区滑坡发育规律,以云贵高原某山区滑坡为例,在选取7个滑坡影响独立因子和1个综合因子的基础上,开展研究区滑坡发育规律和成因分析。结果表明:由软弱易风化的岩土体组成、岩体结构面发育、剖面曲率微凸、位于汇水区域易受水流冲涮的顺向坡,特别是人类活动强烈的区域为滑坡的最有利发育区,该规律对类似地区滑坡地质灾害评价提供了参考与借鉴。

The southern mountainous areas are the most frequent areas of landslide geological disasters in China,and especially in recent years,extreme weather has further exacerbated the occurrence of landslides.In order to study the development law of landslides in southern China,a mountain area in the Yunnan-Guizhou Plateau is taken as an example.On the basis of selecting 7 independent factors and 1 comprehensive factor,the development law and causes of landslides in the study area are analyzed.The results show that the most favorable development area for landslides is composed of weak and easily weathered rock and soil,developed rock structural planes,slightly convex profile curvature,and a downstream slope located in the catchment area that is easily washed by water flow,especially in areas with strong human activity.This law provides reference and guidance for the evaluation of landslide geological disasters in similar areas.