摘要
本文以广东紫金县苏区镇炮子村石阶子小组滑坡为例,通过遥感解译、野外实地调查、钻探勘查、工程物探、软件分析和机载激光雷达建模等手段,详细分析石阶子小组滑坡发育特征、成因机理及稳定性.结果表明:石阶子小组滑坡为浅层牵引式坡残积层滑坡;滑坡形成的内部因素包括地形地貌、地质构造条件、水文地质条件、斜坡结构、岩土体性质等,外部因素主要为降雨和人类工程活动;滑坡成灾模式总体体现为逐级后退、依次破坏的特征,坡体在坡脚临空牵引和雨水渗透的持续作用下,发生逐级渐进破坏;天然工况下边坡处于稳定状态,在暴雨工况下不稳定.
Abstract
Taking the landslide of Shijiezi Group in Paozi Village,Suqu Town,Zijin County,Guangdong Province as an example,he development characteristics,genesis mechanism and stability of the Shijiezi Group landslide are analyzed in detail by means of remote sensing interpretation,field investigation,drilling exploration,geophysical exploration,software analysis and airborne LiDAR modeling.The results show that the Shijiezi Group landslide is a shallow traction slope eluvium landslide;the internal factors of landslide formation include topography,geological structure conditions,hydrogeological conditions,slope structure,and properties of rock and soil mass,etc,and the external factors are mainly rainfall and human engineering activities.The landslide disaster mode is generally characterized by step-by-step retreat and sequential destruction,and the slope body is gradually damaged step-by-step under the continuous action of air traction and rainwater infiltration.The slope of landslide is stable under natural working condition and unstable under heavy rainfall working condition.
基金项目
广东省重点乡镇1∶10 000地质灾害风险调查评价(河源市紫金县苏区镇)项目(H202302002)
广东省地质灾害应急抢险技术能力提升研究项目(0809-2140GDC35071)
广东省重大突发地质灾害应急监测预警与处置技术研究项目(2022025)
维普
万方数据