| 基于无人机摄影测量技术的高陡边坡危岩体特征构建与分析 |
| 投稿时间：2022-10-08 修订日期：2022-12-26 点此下载全文 |
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| 中文摘要:在高陡边坡的危岩体调查中，受限于调查人员可到达的范围，难以获取危岩体的特征参数，从而影响危岩体的稳定性判别。无人机摄影测量技术能够安全、快速、全面、精准的获取危岩体的特征信息。本文以鸡冠岭崩塌隐患为例，利用无人机摄影测量技术获取坡面高精度影像，通过提取点云数据构建三维模型，基于最小二乘法完成平面拟合获取危岩体的体积及结构面产状信息，并结合实际测量数据，采用赤平极射投影法和极限平衡法定性和定量评价危岩体的稳定性。经过分析计算，鸡冠岭崩塌四处主要危岩体的体积分别为102.86m3、355.27m3、236.60m3和454.91m3，根据定性分析和定量计算，危岩体均为欠稳定状态。通过本文的实践，体现了无人机摄影测量技术在识别高位隐蔽危岩体方面的优势，对于发展基于无人机摄影测量技术定量判定危岩体的稳定性方面具有借鉴意义。 |
| 中文关键词:高陡边坡 无人机摄影测量 稳定性分析 赤平投影 危岩体 |
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| Construction And Analysis Of Dangerous Rock Mass Characteristics Of High And Steep Slope Based On UAV Photogrammetry Technology |
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| Abstract:Due to the limit of complex terrain, traditional investigation is difficult to effectively measure the structural plane of the investigation rock slope. UAV photogrammetry can safely，accurately, quickly and comprehensively obtain information for the investigation objectives. This paper takes the Jiguanling rockfall disaster area as the study area, applying unmanned aerial vehicle（UAV）photogrammetry to obtain high- precision image of rock slope. Point cloud data were extracted from image and 3D model was constructed to calculate the volume of dangerous rock mass. Based on the least squares method to complete the plane fitting to obtain the information of the structural plane occurrence of the dangerous rock mass. Combined with the actual measurement data, the stereographic projection method is used to judge the damage mode of the dangerous rock mass, and the limit equilibrium method is used to calculate the stability coefficient of the dangerous rock mass. According to the calculation results, the volume of the dangerous rock WY1 is 102.86m3, WY2 is 355.27m3，WY3 is 236.60m3，WY4 is 454.91m3, and they are in an under-stable state. According to this paper, the advantages of UAV photogrammetry technology in identifying high-level hidden dangerous rock mass are embodied, which is of reference significance for the development of quantitative determination of dangerous rock stability based on UAV photogrammetry technology. |
| keywords:high and steep slope unmanned aerial vehicle (UAV) photography Stability Analysis stereographic projection dangerous rock mass |
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