从三维激光扫描技术应用于地铁隧道变形监测实际出发，研究三维激光扫描技术在隧道变形监测中的应用，给出一种适用于隧道数据采集的多站共用靶标连续拼接法。针对如何确定隧道变形的关键问题，提出一种通过建立参考系、点云格网化、剖面图提取、变形量值计算等流程确定隧道变形的新方法。将该技术应用于地铁隧道扫描实验，结果发现提出的方法能够在任意位置提取隧道断面，能够确定隧道变形量值，是一种有效的确定隧道变形的新方法。

The application of 3D laser scanning technology to the deformation monitoring of metro tunnels is studied. A multi-station shared-target continuous-splicing method suitable for tunnel data acquisition is presented. A new method for determining tunnel deformation is proposed using a reference frame, point cloud gridding, section extraction, and deformation magnitude calculations. The technique is applied to a subway tunnel scanning experiment. It is found that the proposed method can extract the tunnel section at any position and determine the tunnel deformation value. This is an effective method to determine the tunnel deformation.

U231

重庆市教育委员会科学技术研究项目(KJ1503308)