剑河县某滑坡地质灾害成因分析及防治研究  

A Study on the Causes and Prevention of a Landslide in Jianhe County

作　　者：龙碧娟 杨飞 LONG Bijuan;YANG Fei(No.101 Geological Brigade,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Kaili Guizhou 556000)

机构地区：[1]贵州省地质矿产勘查开发局一0一地质大队,贵州凯里556000

出　　处：《有色金属设计》2024年第2期127-135,共9页Nonferrous Metals Design

摘　　要：剑河县多数区域地层岩性为板岩,研究板岩区域滑坡形成原因机理,对整个剑河县的滑坡防治尤为重要。通过勘查、实验测试、理论分析等,基本查明剑河县某滑坡的范围、规模、结构、变形特征、成因机制及目前稳定状况,并分析预测滑坡的变形发展趋势,评价其在各种工况下滑坡的稳定性,确定最终防治工程设计方案。根据计算数据分析,结合滑坡体所处的地形地貌,天然状态下滑坡稳定系数K f为1.539,整体处于稳定状态;20年一遇强降雨时滑体饱水,其稳定系数K f为1.196,趋于稳定状态,50年一遇强降雨时滑体饱水,其稳定系数K f为1.193,趋于稳定状态。但前缘存在因开挖形成的高陡临空面,且未做有效支挡工程,发生局部滑塌的可能性大。Given that the majority of geological formations in Jianhe County consist of slate,understanding the mechanisms behind landslide formation in slate areas is of paramount importance for landslide prevention across the entire county.Through geological surveys,testing,theoretical analyses,and other methodologies,this study comprehensively investigated the extent,magnitude,structure,deformation features,causative mechanisms,and presented stability condition of a specific landslide in Jianhe County.It further analyzed and predicted the deformation trends of the landslide,assessed its stability under various operational scenarios,and established the ultimate engineering design scheme for mitigation.Based on computational data analysis,coupled with an assessment of the topography and geomorphology where the landslide is located,the natural state stability factor K f is found to be 1.539,indicating overall stability.During extreme rainfall events expected once every 20 years,with the slide mass saturated,K f decreases to 1.196,still tending towards stability.For events anticipated once every 50 years,K f reduces to 1.193 under similar saturation,also trending towards stability.Nevertheless,there is a high and steep exposed face at the forefront of the landslide,resulting from excavation activities,and lacking effective supporting measures;this increases the likelihood of localized landslide occurrences.

关 键 词：滑坡 成因 特征 趋势 稳定性 解决方案 

分 类 号：P642.22[天文地球—工程地质学]