基于三维激光扫描数据的地铁隧道断面测量

Subway Tunnel Profile Measurement Based on Ground 3D Laser Scanning Data

地铁主体施工完毕后为了对线路进行调线调坡,需要对地铁隧道进行断面测量,三维激光扫描与常规测量方法相比具有非接触式测量,可高密度采集空间三维点云数据等特点,为地铁断面测量提供了新的途径。本文基于Leica Scanstation 2扫描仪分析了三维激光扫描点云数据采集步骤和数据处理流程,阐述了基于点云数据的地铁断面测量方法,分析了三维激光扫描技术在隧道断面测量中应用的可行性。研究结果表明,这种高密度、高精度的隧道断面能够满足地铁调线调坡等方面的技术要求。

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 3 D 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 proce- dures and data processing, expounded the subway profile measurement method based on point cloud data; analyzed the feasibility of 3 D laser scanning technology in the application of tunnel profile measurement. The results show that the profile measured by this meth- od can meet the technical requirements of route adjustment of alignment and gradient.