一种真圆型隧道激光扫描断面变形检测新方法的研究

发布时间：2018-01-11 17:35

本文关键词：一种真圆型隧道激光扫描断面变形检测新方法的研究　出处：《隧道建设》2017年07期 　论文类型：期刊论文

【摘要】：本文介绍了一种基于高密度三维激光扫描仪的高精度快速全断面变形检测新方法——Tunnelscan隧道扫描测量系统,该系统采用扫描仪绝对定位法进行点云配准和隧道控制坐标系坐标传递,使用与断面点距离最小的最小二乘法进行隧道实测断面中心点计算和基于与参考断面的断面差环状过滤器进行隧道点云切片杂点过滤,通过多次过滤、拟合迭代后获得去噪后的真圆管环实测断面。该系统还通过参考断面轮廓线投影法将三维点云投影成激光雷达隧道正射影像,为实现隧道结构安全"全面检测"提供了一种全新用户成果类型,用于全面分析隧道断面变形、结构侵界和裂缝渗水等隧道病害。采用该方法在昆明地铁3号线马眠区间做了一段竣工测量实地测试,经过总体分析后,再按图索骥去找断面变形量较大里程的断面图可谓是事半功倍,非常适合地铁隧道变形检测大数据量的批量化分析,而且成果查看比直接在三维点云或者三维模型上分析更加直观,没有视角遮挡问题。
[Abstract]:In this paper, a new method of high precision and fast full section deformation detection based on high density 3D laser scanner, Tunnelscan tunneling scanning measurement system, is introduced. The system adopts the absolute positioning method of scanner to transfer the coordinates of point cloud registration and tunnel control coordinate system. The least square method with minimum distance from the cross section is used to calculate the center point of the measured section of the tunnel and the cross section differential ring filter based on the reference section is used to filter the clutter points of the tunnel point cloud slice. The measured section of the true circular ring is obtained after fitting iteration. The system also projects the 3D point cloud into the laser radar tunnel orthophoto image by the method of reference section profile projection. In order to realize the safety of tunnel structure "comprehensive inspection" provides a new type of user results for the overall analysis of tunnel section deformation. This method has been used in the field test of a section of completed survey in Mamian section of Kunming Metro Line 3. After overall analysis, the method has been applied to the tunnel diseases such as structure invasion and crack seepage. Then according to the clues to find the section deformation of the larger mileage section map can be described as a multiplier of effort, is very suitable for the subway tunnel deformation detection large amount of data batch analysis. Moreover, the view of the results is more intuitive than the analysis directly on the 3D point cloud or 3D model, and there is no angle of view occlusion problem.
【作者单位】：上海数联空间科技有限公司;昆明轨道交通集团有限公司;
【基金】：云南省交通运输厅科技项目(云交科2016(A)09)
【分类号】：U456.3
【正文快照】： 0引言使用盾构法施工的真圆型管环隧道的变形监测和检测是地铁建设和运营中一个难点问题。文献[1-3]采用的检测方法都需要在被检测的隧道断面上预先布设测点和传感器,且是对隧道断面进行抽样检测,因此对于整条隧道的结构安全检测需求来说,存在空间分辨率不足的局限。随着三维

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