Author(s): LIU Shaotang, LIU Wenkai, ZHOU Yueyin, School of Civil Engineering, Henan Institute of Engineering, School of Surveying and Geoinformatics, Tongji University
Pages: 981-986
Year: 2014 Issue:  8
Journal: Geomatics and Information Science of Wunan University
Keyword:  tunnel deformation monitoring; 3D laser scanning; convergence monitoring; tunnel deformation analysis;
Abstract: In order to applied the three-dimensional laser scanning technology to tunnel deformation field,this paper proposed the overall tunnel deformation monitoring methods to replace the traditional single-point monitoring with engineering experimental research tools.Described the operation processes and pointed out what should pay attention to,discussed the point cloud registration and coordinates conversion problems.The study showed that the scanning stations distance can not exceed the diameter of the tunnel if ICP registration is taken,and set the reasonable scanning resolution to high resolution grade is appropriate.In order to avoid obstacles impact it is needed to scan on both sides of the tunnel centerline as scanning shielding rate is too large.The new method gives a fast,full access to get the complete deformation data of the tunnel surface and overcomes the shortcomings of the traditional methods.