Overall denoising method for shield tunnel based on point cloud spatial expansion

doi:10.13474/j.cnki.11-2246.2024.0228

Abstract

Abstract: The denoising of point cloud data in shield tunneling is a prerequisite for subsequent tunnel structure analysis.This paper proposes an overall denoising method for shield tunnels based on the theory of point cloud spatial expansion and the cylindrical characteristics of shield tunnels. Firstly,the shield tunnel is spatially expanded to obtain a new topological structure,enabling the application of existing mature ground filtering algorithms for denoising.After direct pass filtering and slope filtering,the point cloud of the tunnel retains the complete lining structure while removing the ancillary facilities of tunnel.Experimental tests are conducted on both straight and curved tunnels, and the results demonstrate that this method achieves significant overall denoising of the tunnel with remarkable denoising effects.

Key words: 3D laser scanning technology, shield tunnel, denoising, point cloud space expansion, slope

CLC Number:

P258

SHEN Changbiao, XIA Yonghua, LIU Yong, WANG Dandan. Overall denoising method for shield tunnel based on point cloud spatial expansion[J]. Bulletin of Surveying and Mapping, 2024, 0(2): 153-156.

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