|Table of Contents|

Extraction Method of Tunnel-section Deformation Based on Orbital Mobile Laser Scanning Multi-phase Point Cloud(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2023年02期
Page:
25-33
Research Field:
地理学
Publishing date:

Info

Title:
Extraction Method of Tunnel-section Deformation Based on Orbital Mobile Laser Scanning Multi-phase Point Cloud
Author(s):
Wang Yongfeng1; Zheng Dehua2
(1.Hangzhou Survey Design Research Institute Co.,Ltd,Hangzhou 310012,China)
(2.School of Earth Sciences and Engineering,Hohai University,Nanjing 210098,China)
Keywords:
orbital mobile laser scanning;  tunnel point cloud;  weight-based fine registration;  section deformation extraction;  curve fitting
PACS:
P258
DOI:
10.3969/j.issn.1001-4616.2023.02.004
Abstract:
Aiming at the problem of point cloud data characteristics for monitoring subway tunnel deformation with orbital mobile laser scanning technology and the extraction and analysis of tunnel section deformation information, a deformation extraction method and processing flow of tunnel section based on orbital mobile laser scanning point cloud are proposed in this paper. Firstly, the RANSAC cylinder detection method is used to extract the point cloud of the characteristic parts of the subway structure, and the extracted tunnel structure point cloud is used for rough registration of the point cloud. Afterwards, a fine registration method based on the weight-based ICP algorithm is designed, the finely registered tunnel point cloud is processed by slice point cloud dimension reduction to obtain two-dimensional cross-section data, the deformation value of the tunnel section is extracted by fitting the curve of the k-nearest neighbor points of the section, and the section deformation is expressed by the method of arc projection. The experimental verification shows that the proposed method and process of tunnel section deformation analysis based on curve fitting can accurately and efficiently extract the deformation information more than 0.7 mm of subway tunnel section.

References:

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Last Update: 2023-06-15