A Method for Convergent Deformation Analysis of a Shield Tunnel Incorporating B-Spline Fitting and ICP Alignment

The application of three-dimensional laser scanning technology in the field of tunnel deformation monitoring has changed the traditional measurement method. It provides an automated and intelligent solution for monitoring the geometric deformation of tunnel sections due to its high efficiency and in...

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Published in:Remote sensing (Basel, Switzerland) Switzerland), 2023-11, Vol.15 (21), p.5112
Main Authors: Wang, Zihan, Xu, Xiangyang, He, Xuhui, Wei, Xiaojun, Yang, Hao
Format: Article
Language:English
Subjects:
3D laser scanning technology
Algorithms
Alignment
Appendages
B-spline fitting
Convergence
convergent deformation
Data processing
Deformation
Deformation analysis
high-precision tunnel modelling
ICP alignment
Innovations
Lasers
Mathematical analysis
Measurement methods
Methods
Monitoring
Monitoring methods
Nearest-neighbor
Parameter estimation
Scanning devices
Tunneling shields
Wavelet transforms
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creator Wang, Zihan
Xu, Xiangyang
He, Xuhui
Wei, Xiaojun
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description The application of three-dimensional laser scanning technology in the field of tunnel deformation monitoring has changed the traditional measurement method. It provides an automated and intelligent solution for monitoring the geometric deformation of tunnel sections due to its high efficiency and independence from environmental influences. In this paper, based on B-spline fitting and iterative nearest point (ICP) alignment, the calculation of the difference between the radial distance and the design radius of a tunnel is transformed into a curve transformation that iterates over the nearest-neighbor points and calculates the difference in the distance between the corresponding points. The innovation of this paper is that the high-precision tunnel deformation monitoring method integrating B-spline fitting and ICP alignment can automatically compensate for the missing point clouds, is not affected by the point clouds of the tunnel inner and outer liner appendages, is more sensitive in the local deformation feedback and can be applied to a variety of tunnel shapes. The results indicate that our method maximally improves the accuracy of the horizontal convergence calculation by 28.6 mm and the accuracy of the vault settlement by 27.8 mm in comparison with the least squares circle fitting algorithm.
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subjects 3D laser scanning technology
Algorithms
Alignment
Appendages
B-spline fitting
Convergence
convergent deformation
Data processing
Deformation
Deformation analysis
high-precision tunnel modelling
ICP alignment
Innovations
Lasers
Mathematical analysis
Measurement methods
Methods
Monitoring
Monitoring methods
Nearest-neighbor
Parameter estimation
Scanning devices
Tunneling shields
Wavelet transforms
title A Method for Convergent Deformation Analysis of a Shield Tunnel Incorporating B-Spline Fitting and ICP Alignment
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