地铁隧道变形监测方法研究
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摘要
通过三维激光扫描技术对地铁隧道进行变形监测,对点云数据进行预处理后,用基于最小包围盒法提取中轴线,以中轴线为基准,先提取断面进行局部拟合再结合RANSAC算法对所有断面进行二次曲面全局拟合进行整体隧道状态分析。可将复杂的隧道模型的全局拟合转化成对许多圆环切片进行的局部拟合,减小了工作量,便于对重点观测部位进行变形监测。对某地铁隧道扫描数据进行处理与对比,表明此方法满足实际作业需求。
Through the 3D laser scanning technology,the deformation monitoring of the subway tunnel is carried out.After preprocessing the point cloud data,the central axis is extracted based on the minimum bounding box method,and the central axis is used as the reference. Combined with the RANSAC algorithm,the quadratic surface global fitting of all sections is used to analyze the overall tunnel state. The global fit of the complex tunnel model can be transformed into a local fit to many ring slices,reducing the workload and facilitating deformation monitoring of key observation sites.Process and compare the scan data of a subway tunnel. It shows that this method meets the actual operation requirements and has practical value.
Through the 3D laser scanning technology,the deformation monitoring of the subway tunnel is carried out.After preprocessing the point cloud data,the central axis is extracted based on the minimum bounding box method,and the central axis is used as the reference. Combined with the RANSAC algorithm,the quadratic surface global fitting of all sections is used to analyze the overall tunnel state. The global fit of the complex tunnel model can be transformed into a local fit to many ring slices,reducing the workload and facilitating deformation monitoring of key observation sites.Process and compare the scan data of a subway tunnel. It shows that this method meets the actual operation requirements and has practical value.
引文
[1]谢宏全,侯坤.地面三维激光扫描技术与工程应用[M].武汉:武汉大学出版社,2013:274.
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[3]袁长征,滕德贵,胡波等.三维激光扫描技术在地铁隧道变形监测中的应用[J].测绘通报,2017(9):160~161.
[4]夏国芳,王晏民.三维激光扫描技术在隧道横纵断面测量中的应用研究[J].北京建筑工程学报,2010,26(3):21~24.
[5]拖雷.基于三维激光扫描数据的地铁隧道变形监测[D].北京:中国地质大学,2012.
[6] Han S,Cho H,Kim S,et al. Automated and Efficient Method for Extraction of Tunnel Cross Sections Using Terrestrial Laser Scanned Data[J]. Journal of omputing in Civil Engineering,2012,27(3):274~281.
[7]吴爱,康志忠.隧道断面截取曲面拟合优化的点云简化方法[J].测绘科学,2015,40(9):92~97.
[8]陈华.确定任意形状物体最小包围盒的一种方法[J].工程图学报,2010,31(2):49~53.
[2]侯海民.三维激光扫描仪在青岛胶州湾海底隧道的应用[J].隧道建设,2010,30(6):693~696.
[3]袁长征,滕德贵,胡波等.三维激光扫描技术在地铁隧道变形监测中的应用[J].测绘通报,2017(9):160~161.
[4]夏国芳,王晏民.三维激光扫描技术在隧道横纵断面测量中的应用研究[J].北京建筑工程学报,2010,26(3):21~24.
[5]拖雷.基于三维激光扫描数据的地铁隧道变形监测[D].北京:中国地质大学,2012.
[6] Han S,Cho H,Kim S,et al. Automated and Efficient Method for Extraction of Tunnel Cross Sections Using Terrestrial Laser Scanned Data[J]. Journal of omputing in Civil Engineering,2012,27(3):274~281.
[7]吴爱,康志忠.隧道断面截取曲面拟合优化的点云简化方法[J].测绘科学,2015,40(9):92~97.
[8]陈华.确定任意形状物体最小包围盒的一种方法[J].工程图学报,2010,31(2):49~53.