三维激光扫描技术在城市地下轨道交通测量中的应用研究

Research on the Application of 3D Laser Scanning Technology in Urban Underground Rail Transit Measurement

移动三维激光扫描技术是数字地球技术的一个热点,三维竣工测量是测绘中一个相对较新的概念。研制了一种用于城市地下轨道三维竣工测量的移动式三维激光扫描系统。根据地下轨道环境的特点和移动式激光扫描系统的特点,设计了一种合适的测试方案,以提高这种移动式激光扫描系统在无GPS信号环境下工作的精度。完成了该技术在某地铁线路三维竣工测量中的应用,同时基于这种移动式三维激光扫描技术,制订了一套三维地下测量的技术流程。利用移动式三维激光扫描技术完成地下轨道竣工测量在国内尚属首次,可为铁路竣工测量的三维测量或其他地区的三维竣工测量提供参考。

Mobile 3D laser scanning technology is a hotspot in digital earth technology,and 3D completion measurement is a relatively new concept in surveying and mapping.This article develops a mobile 3D laser scanning system for the 3D completion measurement of urban underground tracks.According to the characteristics of the underground rail environment and the mobile laser scanning system,this paper designs a suitable measurement scheme to improve the working accuracy of this mobile laser scanning system in the environment without GPS signals.The paper has completed the application of this technology in the 3D completion measurement of a certain subway line,and has developed a set of technical process for 3D underground measurement based on the mobile 3D laser scanning technology.It is the first time in China that mobile 3D laser scanning technology is used to complete the completion measurement of underground tracks,which can provide reference for the 3D measurement of railway completion measurement or the 3D completion measurement in other areas.