测绘通报 ›› 2024, Vol. 0 ›› Issue (2): 153-156.doi: 10.13474/j.cnki.11-2246.2024.0228

• 技术交流 • 上一篇    下一篇

基于点云空间扩展的盾构隧道整体去噪方法

沈长表1,2, 夏永华2,3, 刘勇4, 王丹丹3   

  1. 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
  • 收稿日期:2023-06-21 出版日期:2024-02-25 发布日期:2024-03-12
  • 通讯作者: 夏永华。E-mail:20040063@kmust.edu.cn
  • 作者简介:沈长表(1998—),男,硕士生,研究方向为点云处理与应用,盾构隧道病虫害检测。E-mail:scb1900@163.com
  • 基金资助:
    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)

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

SHEN Changbiao1,2, XIA Yonghua2,3, LIU Yong4, WANG Dandan3   

  1. 1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China;
    2. Surveying & Mapping Technology and Application Research Center on Plateau Mountains of Yunnan Higher Education, Kunming University of Science and Technology, Kunming 650093, China;
    3. City College, Kunming University of Science and Technology, Kunming 650051, China;
    4. Zhejiang Tongji Vocational College of Science and Technology, Hangzhou 311231, China
  • Received:2023-06-21 Online:2024-02-25 Published:2024-03-12

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。

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

Abstract: 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.

Key words: 3D laser scanning technology, shield tunnel, denoising, point cloud space expansion, slope

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