基于点云空间扩展的盾构隧道整体去噪方法  

Overall denoising method for shield tunnel based on point cloud spatial expansion

作　　者：沈长表 夏永华 刘勇[4] 王丹丹 SHEN Changbiao;XIA Yonghua;LIU Yong;WANG Dandan(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Surveying&Mapping Technology and Application Research Center on Plateau Mountains of Yunnan Higher Education,Kunming University of Science and Technology,Kunming 650093,China;City College,Kunming University of Science and Technology,Kunming 650051,China;Zhejiang Tongji Vocational College of Science and Technology,Hangzhou 311231,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南高校高原山区空间信息测绘技术应用工程研究中心,云南昆明650093 [3]昆明理工大学城市学院,云南昆明650051 [4]浙江同济科技职业学院,浙江杭州311231

出　　处：《测绘通报》2024年第2期153-156,共4页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(41861054);宜良九乡风景区三角洞洞内三维建模测绘(KKF0201856026);三维激光扫描和室内定位技术在地下空间信息化中的应用研究(KKF0201956004)。

摘　　要：盾构隧道点云数据的去噪工作是后续隧道结构分析的前提。本文结合点云空间扩展理论与盾构隧道呈圆柱形的特点,提出了一种盾构隧道的整体去噪方法。首先将盾构隧道空间扩展后得到新的拓扑结构,使盾构隧道的去噪工作能够使用现有成熟的地面滤波算法。经过直通滤波、坡度滤波后的隧道点云保留完整的衬砌结构,隧道的附属设施被滤除。使用直线段与曲线段隧道进行试验,试验结果表明,该方法能够实现隧道的整体去噪,去噪效果显著。The denoising of point cloud data in shield tunneling is a prerequisite for subsequent tunnel structure analysis.This paper proposes an overall denoising method for shield tunnels based on the theory of point cloud spatial expansion and the cylindrical characteristics of shield tunnels.Firstly,the shield tunnel is spatially expanded to obtain a new topological structure,enabling the application of existing mature ground filtering algorithms for denoising.After direct pass filtering and slope filtering,the point cloud of the tunnel retains the complete lining structure while removing the ancillary facilities of tunnel.Experimental tests are conducted on both straight and curved tunnels,and the results demonstrate that this method achieves significant overall denoising of the tunnel with remarkable denoising effects.

关 键 词：三维激光扫描技术 盾构隧道 去噪 点云空间扩展 坡度 

分 类 号：P258[天文地球—测绘科学与技术]