基于三维激光扫描的隧道收敛分析

Tunnel convergence analysis based on 3D laser scanning

快速准确全面地获取对象的空间信息是三维激光扫描技术的特点。本文基于三维激光扫描技术快速地采集盾构隧道的点云数据,并对其分割生成切片,提出一种多点坐标平差计算圆心的方法求取切片圆心和半径,分析隧道的收敛变化。最终通过实例证明了该方法的可行性和准确性。

3D laser scanning technology can be used to obtain the spatial information of objects rapidly, precisely and comprehensively. Based on 3D laser scanner, firstly, the point clouds data of shield tunnel is sampled rapidly, then, they serve as the input of segmentation for slice generation, meanwhile, a multipoint coordinate adjustment method is proposed to calculate center and radius of circle which is used as the quantity for convergence change analysis. Finally, one case study has been made to illustrate the feasibility and accuracy of this method.