Accurate fitting and deformation analysis of metro tunnel section based on point cloud

doi:10.13474/j.cnki.11-2246.2020.0270

Abstract

Abstract: Aiming at the problem that 3D laser scanning technology is difficult to accurately fit and analyze the deformation of tunnel sections with different shapes, such as circular and horseshoe-shaped subways, a method of tunnel section fitting analysis based on cubic b-spline curve is proposed.Firstly, cubic b-spline curve is used to fit the section. Then, the feature points of the cross section are extracted according to the fitted curve to realize the deformation analysis of the cross section. The cross-section analysis of the point cloud data of a subway tunnel shows that this method can analyze deformation information of tunnel section quickly and accurately.

Key words: point cloud, cubic B-spline curve fitting, section fitting, feature point extraction, deformation analysis

CLC Number:

LI Zhiyuan, WANG Jian, YU Deliang, SUN Wenxiao. Accurate fitting and deformation analysis of metro tunnel section based on point cloud[J]. Bulletin of Surveying and Mapping, 2020, 0(8): 157-159.

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Accurate fitting and deformation analysis of metro tunnel section based on point cloud

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