摘要
针对地铁隧道施工和运营中的变形情况,利用地面激光扫描技术快速采集地铁隧道点云数据,对所采集的海量散乱点云进行去噪、配准等内业处理,并对预处理后的点云数据应用分层切片技术获取断面,通过断面点应用最小二乘法计算圆的圆心坐标和半径,将计算值与设计值进行比较以判断收敛情况。为了监测不同期相同段的变形情况,特采集两期测量数据,并求出变化量曲线以及分析变化情况。试验结果表明,相对于传统的收敛变形监测方法,该方法极大地提高了作业效率,降低了作业强度,缩短了变形监测周期,具有可行性和准确性。
In order to examine the deformation during metro tunnel construction and operation, the terrestrial laser scanning technique（TLS） was used for rapid collection of point cloud data. After such processing as denoising andrectification of the collected scattered point cloud data, sections were obtained by applying the slicing technique.Based on this, the center coordinate and radius of one circle was calculated by the least square method and the con-vergence conditions were determined by comparing the calculated values with the design values. In order to monitorthe deformation of the same segment over different periods, two groups of data were collected to establish the varia-tion curve to analyze the deformation changes. The test results show that, compared with the traditional method forconvergence monitoring, this method is feasible and accurate since it greatly improves the working efficiency, reduc-es the working intensities and shortens the monitoring cycle.
出处
《现代隧道技术》
EI
CSCD
北大核心
2016年第3期105-110,共6页
Modern Tunnelling Technology
基金
江西省科技计划支撑项目(20142BBF60011)
关键词
地面激光扫描
地铁隧道
收敛变形监测
点云分层切片
Terrestrial Laser Scanning
Metro tunnel
Convergence monitoring
Slicing technique for point cloud data
