三维激光扫描监测基坑变形分析

Application of 3D laser scanning technology in deformation monitoring of foundation pit

为解决传统基坑监测技术无法对基坑整体变形进行有效分析的问题,本文提出地面三维激光扫描技术应用于基坑监测的方法。该方法使用Leica Scanstation C10型扫描仪获取大量基坑围护墙体的点云数据,经过点云处理并建模,采用Geomagic Studio软件对点云模型进行变形分析,得到基坑围护墙体的3D整体变形和2D局部变形。通过和传统的测斜数据进行对比,两种监测技术在变形量上有较大偏差,对产生偏差的原因进行了简单的分析。为了提高三维激光扫描技术的监测精度,文章最后提出了相应的解决措施。

In order to solve the problem that traditional foundation pit monitoring technology cannot analyze effectively the foundation pit deformation, this paper put forward the method which uses the ground 3D laser scanning technology to monitor the foundation pit. It used the Leica Scanstation C10 scanner to obtain a large number of point cloud data of the foundation pit retaining wall, after the point cloud has processed and modeled, the point cloud model deformation was analyzed in the Geomagic Studio software for getting the whole deformation of the 3D and the local deformation of the 2D. Then the comparative analysis between the method and the traditional monitoring method was carried out. Finally, to improve the monitoring accuracy of 3D laser scanning technology, the corresponding solutions were presented.