三维激光扫描进行隧道变形探测的可行性研究

Research on Feasibility to Detect the Tunnel Deformation Based on 3D Laser Scanning

针对隧道区域变形特点,研究利用三维激光扫描技术进行隧道变形探测的可行性。根据基准面与隧道内壁点云法向量及地面的关系,获取点云数据的切片,然后应用改进的ICP算法对不同测站切片数据进行配准,使用KNNS搜索算法得出隧道可探变形区域的最小面积。实验结果表明:在明确区域变形临界值的情况下,利用三维激光扫描技术可以对隧道的变形区域进行探测,对于隧道变形监测有一定的指导意义。

Based on the zonal deformation characteristics of tunnels,the method of using three-dimensional laser scanning technology for detecting the tunnel deformation has been proposed.This paper gets the point cloud slice,according to the relationship between the datum plane,the normal vector of the tunnel inwall point cloud and the ground surface.Then it gets the slice data of different stations fitted using the improved ICP algorithm,and based on the KNNS search algorithm explores the minimum area of the tunnel deformation zone.The experimental result shows that in the case of a clear regional deformation threshold,3D laser scanning technology can detect the deformation zone of the tunnel and has certain guiding significance for tunnel deformation monitoring.