金沙江奔子栏-真达乡河段滑坡分布规律及其控制因素研究  

STUDY ON THE DISTRIBUTION PATTERNS AND CONTROLLING FACTORS OF LANDSLIDES IN THE BENZILAN TO ZHENDAXIANG RIVER SECTION OF THE JINSHA RIVER

作　　者：廖俊生 许强[1] 张富灵 巨袁臻 杨建[2] 郭德存[2] 何万通 LIAO Junsheng;XU Qiang;ZHANG Fuling;JU Yuanzhen;YANG Jian;GUO Decun;HE Wantong(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;China Renewable Energy Engineering Institute,Beijing 100120,China)

机构地区：[1]地质灾害防治与地质环境保护全国重点实验室(成都理工大学),成都610059 [2]水电水利规划设计总院,北京100120

出　　处：《工程地质学报》2025年第1期201-212,共12页Journal of Engineering Geology

基　　金：高寒山区高位高危地质灾害早期识别及监测关键技术研究项目(资助号:DJ-ZDXM-2020-03).

摘　　要：金沙江奔子栏-真达乡河段位于青藏高原东南缘与横断山脉交界的位置,地质活动强烈,滑坡灾害频发。为进一步掌握金沙江奔子栏至真达乡河段水电站库区及其所属范围的滑坡分布规律及其控制因素,以区内调查和遥感识别的189处滑坡为基础,研究河段滑坡分布的规律,提出相关的控制因素并分析其对滑坡分布规律的影响,通过相关性分析确定主要的控制因素。结果表明:①区内滑坡分布规律的控制因素主要是坡体结构,其次是工程地质岩组和地形地貌;②逆向坡的分布对滑坡发育存在显著影响,逆向坡是区内滑坡的主要坡体结构,为岩体的变形破坏过程提供了缓慢变形的结构基础,使得风化碎裂的岩体堆积在原位构成滑体;③工程地质岩组的分布导致滑坡空间分布规律呈明显的差异性特征,较软岩组中滑坡发育数量最多,占比50.8%;④滑坡主要发育于陡-极陡的中小起伏中山地貌中,地形坡度多介于15°~41°之间,以25°~33°为主,倾向以东西向为主;⑤断裂构造和河流形态控制着局部的滑坡分布,断层距与发育滑坡数量之间存在明显的负相关性。研究成果对区域性的滑坡灾害防治工作和经济稳定发展具有重要意义。The section of the Jinsha River from Benzilan to Zhendaxiang is located at the junction of the southeastern edge of the Qinghai-Tibet Plateau and the Hengduan Mountains.The area is characterized by intense geological activities,leading to frequent landslide disasters.In order to further understand the distribution patterns of landslides in the reservoir area of the hydroelectric station from Benzilan to Zhendaxiang and its associated factors,based on the investigation and remote sensing identification of 189 landslides in this region,the study explores the patterns of landslide distribution in this area.The relevant controlling factors and their impact on the distribution patterns of landslides were explored.Moreover,the main controlling factors are determined through correlation analysis heatmaps.The results indicate:(1)The primary controlling factor for the distribution patterns of landslides in the area is slope structure,followed by engineering geological lithology and topography.(2)The distribution of anticlinal slopes,which is the primary structure in this region,has a significant impact on the development of landslides.The presence of anticlinal slopes provides a foundation for slow deformation in the process of rock mass deformation and failure,leading to the accumulation of weathered and fragmented rock masses in situ,forming the sliding body.(3)The spatial distribution of landslides shows distinct variations due to the distribution of engineering geological lithology.Landslides are most developed in relatively soft rock formations,accounting for 50.8%of the total.(4)Landslides mainly occur in steep to extremely steep medium-sized undulating mountainous terrain.The slope gradient of landslides ranges mostly from 15°to 41°,with the highest concentration between 25°and 33°,predominantly in an east-west direction.(5)Fault structures and river morphology control the local distribution of landslides,and there is a clear negative correlation between fault distances and the number of developed landslides.Th

关 键 词：金沙江上游 滑坡 分布规律 控制因素 

分 类 号：P642.22[天文地球—工程地质学]