Subway Tunnel Profile Measurement Based on Ground 3D Laser Scanning Data
Cao Xian-g · Geomatics & Spatial Information Technology · 2015
After the construction of subway main structure,in order to realize route adjustment of alignment and gradient,it needs to survey the profile of subway tunnel. Compared with conventional measuring methods,3D laser scanning has the characteristics of non- contact measurement and can collect space 3D point cloud data with high density,this provides a new way for the subway profile measurement. Based on the Leica Scanstation 2 scanners this paper analyzed the 3D laser scanning point cloud data collection procedures and data processing,expounded the subway profile measurement method based on point cloud data; analyzed the feasibility of3 D laser scanning technology in the application of tunnel profile measurement. The results show that the profile measured by this method can meet the technical requirements of route adjustment of alignment and gradient.