基于车载LiDAR的吴淞导堤沉降监测分析  

Settlement Monitoring Analysis of Wusong Training Jetty Based on Vehicle LiDAR

作　　者：蔡竞存 李涛 孙涛 李志伟 CAl Jing-cun;LI Tao;SUN Tao;LI Zhi-wei(School of Land Science and Technology,China Agricultural University,Beijing 100000,China;Jiangsu Easymap Geographic Information Technology Corp.Ltd.,Yangzhou Jiangsu 225000,China)

机构地区：[1]中国农业大学土地科学与技术学院,北京海淀100000 [2]江苏易图地理信息科技有限公司,江苏扬州225000

出　　处：《现代测绘》2023年第2期6-9,共4页Modern Surveying and Mapping

基　　金：扬州市重点研发计划—产业前瞻与共性关键技术项目(YZ2019004)。

摘　　要：针对常规数字化地形监测方法在海堤沉降监测中存在测点数据量小、多期测点位置难以固定等问题,采用三维激光扫描技术进行沉降监测,基于密集点云滤波的参考曲面差值统计法,对噪声剔除后的多期导堤的密集点云利用坡度阈值迭代方法提取出堤面地面点集合,然后根据内插形成的栅格DEM进行统计差值拟合出整条导堤的沉降变化差值DEM,进而分析计算导堤各局部沉降量。以上海吴淞导堤为例,在L型导堤折角近处沉降量为12 cm,精度约2.4 cm,结果误差满足精度要求。较传统监测方法,本方法能够快速计算出导堤任一位置的高精度沉降量,有效提高了工作效率和监测精度。In view of the problems of small amount of measuring point data and difficult to fix the position of multi-stage measuring points in the conventional digital terrain monitoring method in seawall settlement monitoring,this paper uses threedimensional laser scanning technology for settlement monitoring,and the reference surface difference statistical method based on dense point cloud filtering,for the dense point cloud of multi-stage guide dike after noise elimination,the slope threshold iterative method is used to extract the set of ground points on the dike surface,and then the statistical difference is fitted according to the interpolated grid DEM to fit the settlement change difference DEM of the whole guide dike,and then the local settlement of the guide dike is analyzed and calculated.Taking Shanghai Wusong guide dike as an example,the settlement near the corner of the L-shaped guide dike is 12 cm,and the accuracy is about 2.4 cm,the result error meets the accuracy requirements.Compared with the traditional monitoring method,this method can quickly calculate the high-precision settlement at any position of the guide dike,and effectively improve the work efficiency and monitoring accuracy.

关 键 词：车载LiDAR 点云滤波 差值统计 沉降监测 

分 类 号：P255.2[天文地球—测绘科学与技术] TV698.1[水利工程—水利水电工程]