基于三维激光扫描和T-样条曲面拟合的边坡变形监测方法

Slope Deformation Monitoring Method Based on 3D Laser Scanning and T-spline Surface Fitting

针对传统边坡监测方法存在的工作量大、数据不全面,模型建立困难、效果差、精度低等难点问题,提出了三维激光扫描技术和T-样条曲面拟合的边坡变形监测方法。该方法首先利用地面三维激光扫描技术对边坡进行外业扫描,完成对边坡数据的采集;对处理后的点云数据采用T-样条进行曲面拟合,得到五期高精度曲面模型并对边坡体整体进行形变分析;选取边坡体中稳定监测点的形变量与全站仪测量数据进行一致性检验,试验结果证明,三维激光扫描技术和T-样条曲面拟合结合的边坡变形监测方法,满足边坡形变监测要求。

In view of the difficulties of traditional slope monitoring methods, such as heavy workload, incomplete data, difficult model establishment, poor effect and low accuracy, a slope deformation monitoring method based on three-dimensional laser scanning technology and T-splines surface fitting is proposed in this paper. In this method, firstly, the 3D laser scanning technology is used to scan the slope in the field to obtain the slope data;then the processed point cloud data are fitted by T-splines to obtain the five phase high-precision surface model and analyze the deformation of the whole slope body;the shape variables of the stability monitoring points in the slope body are selected for consistency test with the total station measurement data. The experimental results prove that the slope deformation monitoring method combining three-dimensional laser scanning technology and T-spline surface fitting meets the requirements of slope deformation monitoring.