无人机微变摄影测量技术在边坡高位危岩体监测中的应用

Application of Micro-variation Photogrammetry Technology Based on UAV in the Monitoring of High-level and Hazardous Rock Mass of Slope

针对传统边坡高位危岩体监测手段的局限性,结合硬梁包水电站厂区边坡高位灾害变形监测要求,引入了无人机微变摄影测量技术,利用无人机采集边坡高位危岩体数据,分辨率可达亚毫米级,并构建三维实景模型,可以生成三维模型、DOM、DEM、数字点云等测绘产品。工程实践表明:微变摄影测量技术获取的三维模型具有真实、纹理清晰、精度高等优势,为边坡高位危岩体调查、监测及巡检提供了一种新的方法。

In view of the limitations of traditional monitoring methods for high-level and hazardous rock mass of slope,and combined with the deformation monitoring requirements of the high-level disaster in the slope of Yingliangbao Hydropower Project,the unmanned aerial vehicle(UAV)micro-variation photogrammetry technology is introduced.The data of the high-level disaster bodies of the slope is collected by an UAV,and the three-dimensional(3D)real scene model is constructed.The resolution ratio can reach sub-millimeter level.The digital elevation matrix(DEM),digital orthophoto map(DOM),digital point cloud and other mapping products are generated.The engineering practice shows that the 3D real-action model obtained by micro-variation photogrammetry technology has the advantages of authenticity,clear texture and high precision,which provides a new method for the investigation,inspection and monitoring of high-level and hazardous rock mass of slope.