城市地质2025，Vol.20Issue(4)：469-475,7.DOI:10.3969/j.issn.2097-3764.2025.04.008
北京山区突发地质灾害孕灾条件分析
Analysis of predisposing conditions of sudden geological disasters in Beijing mountainous areas
摘要
Abstract
Based on the statistical ledger of sudden geological disasters in Beijing in 2023 and the historical data accumulation,this study explores the relationships between topography and geomorphology,engineering-geological rock groups,geological structures,and human engineering activities and the development of three major geological disasters(collapses,landslides,and debris flows)in the mountainous areas of Beijing.The results show that terrain and geomorphology serve as the foundation for the development of geological hazards and influence their types.Geological disasters are most prevalent in low-mountain relief and hilly landform.A slope range of 15° to 25° is the dominant zone for geological disasters,and the number of disasters shows a positive correlation with the slope angle.The relationship between land relief and geological hazards follows a normal distribution,with the most pronounced development occurring within a relief height of 200 m to 500 m.As the elevation rises,both the density and scale of debris flows show a distinctly increasing trend.Geological structures control the spatial distribution and development of geological disasters.The number of disasters is inversely proportional to the distance from faults.Aeras closer to faults experience stronger compressive and tensile forces due to tectonic movements,which promote the development of rock joints and fractures,thereby increasing the probability of disasters.Within engineering geological rock groups,the number and scale of geological disasters exhibit consistent development patterns,predominantly occurring in relatively hard and hard rock groups.Human engineering activities disrupt the original stable geological environment by creating steep and high slopes,which act as catalysts for the occurrence of geological disasters.关键词
北京山区/突发地质灾害/孕灾条件/地形地貌Key words
Beijing mountainous areas/sudden geological disaster/predisposing conditions/topography and landform引用本文复制引用
付德荃,王珊珊,夏鑫,李瑜瑶,孙焘,吴彬,罗守敬..北京山区突发地质灾害孕灾条件分析[J].城市地质,2025,20(4):469-475,7.基金项目
北京市突发地质灾害应急技术服务项目(11000022T000000439462)、房山区南窖主河道旁滑坡综合分析及预警研究(ZFS2025002)联合资助. （11000022T000000439462）
