近景摄影测量在边坡变形监测中的应用

Application of Close-range Photogrammetry in Slope Deformation Monitoring

利用佳能EOS600D数码单反相机对某水电站边坡进行外业拍摄,通过设定基准点标识牌将拍摄成果与测区工程坐标系进行统一,然后利用Lensphoto软件对拍摄影像进行内业数据处理,经空三匹配、空三交会、区域网光束法平差等处理后,生成水电站大坝高边坡三维模型。对比不同监测周期的三维模型,获取边坡变形数据;并通过设定14个检核点,利用高精度全站仪获取检核点坐标数据,与近景摄影测量监测成果进行对比分析,验证了多基线近景摄影测量边坡监测成果的可靠性,能够满足高边坡安全监测需求,为高边坡运营期安全监测提供了低成本、高精度的解决方案。

In this paper,Canon EOS600D digital SLR camera is used to take the images of the slope of a hydropower station in the field,and the images are transformed into the coordinate system of the survey area by setting the reference point sign,and then the Lensphoto software is used to process the shooting images.After processing such as aerotriangulation matching,aerotriangulation intersection,and block bundle adjustment,a three-dimensional model of the high slope of the hydropower station dam is generated,and the three-dimensional models of different monitoring periods are compared to obtain the slope deformation data.By the layouting of 14 checkpoints,it uses a high-accuracy total station to obtain the coordinate data of the checkpoints,and compares and analyzes it with the close-range photogrammetry monitoring results.It verifies the reliability of the multi-baseline close-range photogrammetry slope monitoring results,which can meet the safety monitoring requirements of high slopes and provide high slope operation safety monitoring with a low-cost and high-accuracy solution.