【摘要】 为保证地铁隧道建设过程中的安全,对其进行变形监测是必不可少的工作。传统测量方法采用特征点位进行隧道断面监测,存在数据量较少、点位不够全面等缺点,且工作量较大,工作效率低。针对这一问题,本文将三维激光扫描技术应用于盾构隧道监测,利用获取的三维激光点云对盾构隧道进行监测。为验证其可靠性,将其与全站仪数据进行联合分析。实验表明,三维激光扫描系统测量断面中心坐标的点位精度为3.41 mm,横断面半轴长度与全站仪测量结果的差值小于4 mm;地铁隧道整体表现为水平外凸、竖直下沉的状态。结果显示了三维激光扫描技术的高精度、高效率等工作特点,并且能够对隧道整体变形情况进行分析,具有广阔的发展前景。更多还原

【Abstract】 In order to ensure the safety during the construction of subway tunnels,it is essential to carry out deformation monitoring. Traditional measurement method applies characteristic points to monitor the tunnel section,which has the disadvantages of less data and insufficient points,heavy workload and low efficiency. Aiming at this problem,this paper applied 3D laser scanning technology to shield tunnel monitoring,and explored the acquired 3D laser point cloud to monitor shield tunnels. In order to verify its reliability,it was combined with the total station data for joint analysis. Experiments showed that the point position accuracy of the 3D laser scanning system to measure the center coordinates of the section was 3. 41 mm,the difference between the semi-axial length of the cross section was less than 4 mm with the total station; The subway tunnel appeared to protrude horizontally and sink vertically. The result also demonstrated the high-precision and highefficiency work characteristics of the 3D laser scanning technologyto analyze the overall deformation of the tunnel,which had broad development prospects.更多还原