基于激光点云的电力隧道顶管变形监测方法
Deformation Monitoring Method of Pipe Jacking in Power Tunnel Based on Laser Point Cloud
江春建 1杨璐 1阮晓雨 1史晴波1
作者信息
- 1. 中冀建勘集团有限公司,河北 石家庄 050227
- 折叠
摘要
由于电力隧道顶管变形监测中易受到噪声点影响,使得监测值中存在干扰数据,导致监测结果不精准.为了解决此问题,提出了基于激光点云的电力隧道顶管变形监测方法.利用BIM构建顶管施工模型.利用全站仪通过点云重采样处理冗余噪声数据.积分均匀分布的长方形荷载,采用两段分析法计算顶管垂直附加应力.在应力施加条件下,单独分类噪声点类,以达到去噪效果.以目标区点簇上各点与拟合中心点间距离最小为目标函数,求顶管变形监测模型,获取监测结果.通过实验可知,该方法获取的点云能够剔除噪声点,出现平滑的建模结果,在8月12日、7月13日分别达到最大、最小值,欧几里得距离数值分别为13.5 m、9.5 m.实际监测结果在模型分析范围内,具有很好的监测效果.
Abstract
Because the Deformation monitoring process of power tunnel pipe jacking is easily affected by noise points,there are interfer-ence data in the monitoring data,resulting in inaccurate monitoring results. In order to solve this problem,a laser point cloud based deforma-tion monitoring method for pipe jacking in power tunnels is proposed. Utilize BIM' s functions of drawing vertical grids,elevations,and estab-lishing vertical family units to construct a pipe jacking construction model. The total station is used to observe the coordinates of the measuring points,and the redundant noise data is processed through point cloud resampling. Integrate a uniformly distributed rectangular load and use the two-stage analysis method to calculate the vertical additional stress of the top pipe. Under the condition of stress application,form a point cloud collection in the target area and separately classify noise point classes to achieve denoising effect. Taking the minimum distance between each point on the target area point cluster and the fitting center point as the objective function,solve the pipe jacking deformation monitoring model and obtain the monitoring results. It can be seen from the experimental verification results that the point cloud deformation monitoring method obtained by this method can eliminate the noise points and produce smooth modeling results. The maximum and minimum values were reached on August 12 and July 13,respectively,and the Euclidean distance values were 13. 5m and 9. 5m respectively. The monitoring values are within the ideal deformation range and have precise monitoring effects.
关键词
激光点云/电力隧道/顶管变形/监测/噪声点Key words
laser point cloud/power tunnel/deformation of the top pipe/monitor/noise point引用本文复制引用
出版年
2024
NETL
NSTL
万方数据