融合贴近摄影和LiDAR技术的危岩体三维模型构建及稳定性分析  

Construction of three-dimensional model and stability analysis of dangerous rock mass based on nap-of-the-object photogrammetry and LiDAR technology

作　　者：成书楼 张鹏 黄波林[1,2] 王勋 许凯凯 董星辰 CHENG Shulou;ZHANG Peng;HUANG Bolin;WANG Xun;XU Kaikai;DONG Xingchen(National Field Observation and Research Station of Landslides in Three Gorges Reservoir Area of Yangtze River,Yichang,Hubei 443002,China;College of Civil Engineering&Architecture,China Three Gorges University,Yichang,Hubei 443002,China;No.107 Geological Party,Chongqing Bureau of Geology and Mineral Exploration and Development,Chongqing 401120,China)

机构地区：[1]湖北长江三峡滑坡国家野外科学观测研究站,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002 [3]重庆市地质矿产勘查开发局107地质队,重庆401120

出　　处：《水文地质工程地质》2024年第5期172-181,共10页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目(U23A2045);重庆市规划和自然资源局科研项目(KJ-2023046)。

摘　　要：高陡危岩崩塌是我国山区常见的一种地质灾害,但由于通行困难等客观因素的限制,导致人工地质勘查工作效率低,安全风险高,存在调查死角。以三峡库区老鼠错3号高陡危岩体为例,融合无人机贴近摄影测量和机载LiDAR技术,建立了高陡危岩体调查分析方法体系。在此基础上,系统构建了老鼠错3号危岩体的三维地质模型,获取了该危岩体工程地质特征。研究显示老鼠错3号危岩体发育有5条控制结构面,软弱层最宽27.30 m,凹腔最深2.19 m,崩塌类型为倾倒式崩塌;危岩体稳定性系数在自然工况下为1.375,处于稳定状态,暴雨工况下为1.01,处于欠稳定状态,需进行治理。结果表明融合贴近摄影和LiDAR技术方法对高陡危岩体调查具有较好的互补性,可为高陡危岩体的非接触式测量、地质信息获取及稳定性分析提供一种新的调查思路,为库区的防灾减灾工作提供一定的技术支撑。The collapse of high-steep dangerous rock is a common geological disaster in the mountainous areas of China.However,due to the limitation of objective factors such as traffic difficulties,the efficiency of artificial geological exploration is low and the safety risk is high,and the investigation in some places is unreachable.Based on the Laoshucuo 3#high-steep dangerous rock mass in the Three Gorges Reservoir area,this study established an analysis method system of high-steep dangerous rock mass by integrating UAV nap-of-the-object photogrammetry and airborne LiDAR technology.The three-dimensional geological model of Laoshucuo 3#dangerous rock mass was constructed systematically,and the engineering geological characteristics of the dangerous rock mass were characterized.The results show that there are five structural planes in the dangerous rock mass of Laoshucuo 3#,with the widest weak layer of 27.30 m and the deepest cavity of 2.19 m.The collapse type is toppling collapse.The stability coefficient of the dangerous rock mass is 1.375 under the natural condition,which is in a stable state,and 1.01 under the rainstorm condition,which is in an unstable state and needs to be treated.The technical method in this study has good complementarity to the investigation of high-steep dangerous rock mass,providing a new investigation method for non-contact measurement,geological information acquisition,and stability analysis of high-steep dangerous rock mass,and technical support for disaster prevention and mitigation in the reservoir area.

关 键 词：低空遥感 贴近摄影测量 激光雷达测量 危岩体 稳定性 

分 类 号：P642.21[天文地球—工程地质学]