Construction and application of digital system for tunnel construction based on 3D laser scanning

Abstract

The construction of pumped storage projects involves the construction of underground caverns such as underground powerhouses and diversion tunnels, with tight construction schedules and high quality requirements. In order to improve the digital level of tunnel engineering construction, increase construction efficiency, and ensure project quality, a digital system for tunnel construction based on microservice architecture has been constructed, and lightweight and visualization of large-scale 3D point cloud data for tunnel construction have been achieved based on Cesium. The system utilizes point cloud data collected by 3D laser scanners during tunnel excavation, support, and lining stages, combined with tunnel design parameters, to achieve statistical analysis of quality factors such as tunnel over and under excavation, support deviation, shotcrete and lining thickness and flatness. Based on 3D point cloud data, the system monitors the progress of tunnel engineering, analyzes construction intensity, measures the quantities of tunnel excavation and support, and conducts 3D visualization queries on tunnel deformation. The system can automatically generate tunnel construction quality analysis reports based on analysis result and meet the requirements of engineering management for inspection and evaluation forms and visas. The system has been applied in the access tunnel of a pumped storage power station project, providing effective support for the construction management of the project.

Keywords

tunnel / 3D laser scan / intelligent construction / digital / point cloud