测绘通报 ›› 2025, Vol. 0 ›› Issue (8): 76-82.doi: 10.13474/j.cnki.11-2246.2025.0812

• 学术研究 • 上一篇    下一篇

大型地下洞室的TLS点云变形监测研究

王浩帆1, 李彪1, 李涛2, 肖培伟3, 钱洪建3, 徐奴文4   

  1. 1. 西南石油大学, 四川 成都 610500;
    2. 中国水利水电第十四工程局有限公司, 云南 昆明 650200;
    3. 国家能源集团金沙江旭龙水电有限公司, 四川 成都 610041;
    4. 四川大学山区河流保护与治理全国重点试验室, 四川 成都 610065
  • 收稿日期:2024-12-09 出版日期:2025-08-25 发布日期:2025-09-02
  • 通讯作者: 李彪。E-mail:libiaoscu@163.com E-mail:libiaoscu@163.com
  • 作者简介:王浩帆(2000—),男,硕士生,研究方向为地下洞室三维激光扫描变形监测。E-mail:scwanghaofan@163.com
  • 基金资助:
    国家自然科学基金面上项目(52474150;42277461);四川省自然科学基金(2023NSFSC0812)

Monitoring of TLS point cloud deformation in large underground caverns

WANG Haofan1, LI Biao1, LI Tao2, XIAO Peiwei3, QIAN Hongjian3, XU Nuwen4   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. Sinohydro Engineering Bureau 14 Co., Ltd., Kunming 650200, China;
    3. CHN Energy Jinshajian Xulong Hydropower Co., Ltd., Chengdu 610041, China;
    4. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
  • Received:2024-12-09 Online:2025-08-25 Published:2025-09-02

摘要: 大型地下洞室中变形控制不及时可能会对人员安全和工程进度构成严重威胁,对地下洞室进行变形监测对于预防工程灾害具有重要意义。为解决大型地下洞室工程中变形监测效率低且信息不全面的问题,本文提出了一种基于TLS点云的变形观测技术。该技术包括结合RANSAC Shape Detection算法与曲面变化量的半自动点云降噪处理,以及基于M3C2算法的洞室表面变形计算,实现了大型地下洞室变形全面、高效的监测。应用该技术对旭龙电站主厂房典型区域支护变形进行监测,发现在施工频繁阶段Yc0+140—Yc0+170区间,下游侧拱座存在明显变形条带,且该结果与现场传统变形监测结果一致。观测结果为大型地下洞室变形控制提供了更为全面的三维变形信息,并提高了变形监测的效率。

关键词: 大型地下洞室, 旭龙水电站, TLS点云, 表面变形, 点云降噪

Abstract: Deformation control in large underground caverns may pose a serious threat to personnel safety and engineering progress.Deformation monitoring of underground cavern is of great significance to prevent engineering disasters.To solve the problem of low deformation monitoring efficiency and incomplete information in large-scale underground cavern engineering,a deformation observation technology based on TLS point cloud is proposed in this paper.This technology includes semi-automatic point cloud noise reduction combining RANSAC Shape Detection algorithm and surface variation,and calculation of caverns surface deformation based on M3C2 algorithm,which can realize comprehensive and efficient monitoring of large-scale underground caverns deformation.This technique is applied to monitor the support deformation in a typical area of the main building of Xulong Power station,and it is found that there are obvious deformation bands in the downstream side arch of Yc0+140 to Yc0+170 during the frequent construction stage,and the results are consistent with the traditional deformation monitoring results on site.The observation results provide more comprehensive three-dimensional deformation information for deformation control of large underground caverns and improve the efficiency of deformation monitoring.

Key words: large underground cavern, Xulong hydropower station, TLS point clouds, surface deformation, point clouds denoising

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