3D Point Cloud Monitoring Technology and its Application in Tunnels
(1 Beijing University of Technology, Beijing 100124; 2 Beijing Roads and Bridges Construction Group Co. Ltd., Beijing 100068;
3 China Railway 22nd Bureau Group Co. Ltd., Beijing 100043)
Abstract：
Underground engineering is full of difficulties and risks during tunnel construction, and observational monitoring is becoming more and more important in the course of tunneling construction. Using 3D laser scanning measurement technology, and based on 3D point cloud monitoring, a comparative analysis is carried out in terms of the tunnel excavation process, deformation, and clearance intrusions, the purposes of which are: (1) to trace tunnel settlement, convergence, stress and deformation; (2) to provide a dependable basis for adjusting the support parameters, installing the secondary lining at an optimum time, and modifying the design scheme; and (3) to provide early warning and alarms and risk management based on monitoring results. Engineering practices indicate that the 3D laser scanning system is characterized by high speed and high precision, and its measurement precision meets the specified requirements with the data being very close to that of the Leica TPS1200 total station.
DENG Hong-Liang-1,
FU Si-Yuan-1,
GAO Wen-Xue-1 etc
.3D Point Cloud Monitoring Technology and its Application in Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(5): 199-204
2014, Vol. 51 