Foundation pit operation inspection method and system based on three-dimensional laser scanning technology

The invention provides a foundation pit operation inspection method and system based on a three-dimensional laser scanning technology. The system comprises a three-dimensional laser scanner, a data acquisition module, a single monitoring data processing module and a comparative analysis and alarm module. In the foundation pit excavation process, a three-dimensional laser scanner scans a foundation pit panorama for multiple times according to a set time interval, and point cloud data of the foundation pit panorama are obtained in each scanning; the data acquisition module receives and stores the point cloud data generated by each scanning in real time; a single monitoring data processing module processes and analyzes the point cloud data generated by each scanning; and the comparative analysis and alarm module performs state judgment and determines whether to give an alarm or not. Automatic comprehensive inspection of foundation pit engineering is achieved, the foundation pit construction inspection workload i