Abstract: In view of the low efficiency and high safety risks of surveying the railway siteby using conventional methods such as GPS and total stations,this paper proposes a ground-based laser radar technology for the survey of railway worksites, takes a new generation of ground laser scanner Trimble SX10 as an example,and designs the work plan and process for site survey.The engineering application shows that ground-based laser radar technology can provide high-precision,high-quality three-dimensional topographic maps,sections,and poor geological survey results for railway survey and design.It can greatly improve the operational efficiency,quality of results,and safety factor of the railway site survey.

Key words: ground LiDAR, railway surveying, poor geological surveying measurement