基于LiDAR点云的铁路隧道横断面提取  

Cross-section Extraction of Railway Tunnel From LiDAR Point Cloud

作　　者：安炯 张同刚 沈迅 贾海龙[2] 邓川[2] 邢庭松[2] 金国清 AN Jiong;ZHANG Tonggang;SHEN Xun;JIA Hailong;DENG Chuan;XING Tingsong;JIN Guoqing(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;China Railway Tunnel Group Sanchu Co.,Ltd.,Shenzhen 518000,China;China Railway Fifth Survey and Design Institute Group Co.,Ltd.,Beijing 102600,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756 [2]中铁隧道集团三处有限公司,广东深圳518000 [3]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《测绘与空间地理信息》2022年第1期100-103,107,共5页Geomatics & Spatial Information Technology

基　　金：国铁集团科技研究开发计划(P2019G029);中铁隧道局集团科研项目(2019重大-08-01)资助。

摘　　要：针对三维激光扫描技术在铁路隧道限界分析和收敛分析等应用中关键的点云横断面的快速提取问题,本文提出了适应马蹄形铁路隧道的断面快速提取方法。该方法利用铁路钢轨来确定隧道横断面的方向,并利用RANSAC方法完成隧道断面点云的分类,并完成铁路隧道边墙断面的提取。通过实际铁路隧道的Lidar点云对提出的方法进行试验。实验结果表明,该方法能够快速完成铁路隧道横断面提取,并验证了所提取的断面在隧道限界分析和收敛分析中的实用性。Aiming at the fast cross-section extraction using the mobile LiDAR technology in the clearance analysis and convergence analysis,a fast cross-section extraction method is proposed,which can deal with the horseshoe shaped railway tunnel.The method determines the direction of tunnel cross-section according to the rail,and the point in the cross-section is classified using the RANSAC algorithm,then the cross-section of the side wall of the railway tunnel can be extracted.The proposed method is tested by the real mobile LiDAR point cloud of railway tunnel.The experimental results show that the proposed method can extract the railway tunnel cross-section rapidly,and verifies the practicability of the extracted section in tunnel clearance analysis and convergence analysis.

关 键 词：横断面提取 马蹄形隧道 限界分析 收敛分析 车载LiDAR点云 铁路 

分 类 号：P25[天文地球—测绘科学与技术] TB22[天文地球—大地测量学与测量工程]