Continuously Extracting Section and Deformation Analysis for Subway Tunnel Based on LiDAR Points

doi:10.11947/j.AGCS.2015.20140632

Abstract

Abstract: Monitoring measurement of subway in the stage of construction and operation can ensure the stability of tunnel structure and the safety of its surrounding efficiently. Although existing monitoring measures such as using convergence meter or total station can help to obtain high precision monitoring data, received deformation monitoring points are too sparse, which results in difficulty in reflecting overall deformation characteristics of tunnel. This paper proposed a method for continuously vertical section abstraction and deformation analysis for subway tunnel based on terrestrial point clouds through three-dimensional laser scanning technology applied to deformation monitoring of the tunnel, and made deformation analysis of abstracted two-period section data. The results of the research showed that global deformation of tunnel was reflected more visualized through this method and provided a reference for the dynamic monitoring of tunnel deformation.

Key words: subway tunnel, section extraction, deformation analysis

CLC Number:

P258

LI Cheng, LU Xiaoping, ZHU Ningning, LU Yao, WU Yongbin, LI Guoqing. Continuously Extracting Section and Deformation Analysis for Subway Tunnel Based on LiDAR Points[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(9): 1056-1062.

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