Using 3D laser scanners for engineering—tunnel engineering

Using a 3D laser scanner for tunnel engineering The use of a laser scanner for tunnel measurement is currently a relatively advanced measurement technology in the world. The 3D laser scanner can replace conventional measurement methods to collect basic information, and can scan tunnels under construction or completed to obtain high-precision point cloud models. Because laser scanners can not only collect data at very high resolutions, but also obtain three-dimensional data, it is easy to generate digital elevation models that are more accurate than other conventional measurement methods. Section data can be directly extracted from the point cloud model to evaluate and accept the quality and status of the tunnel project. Compared with the traditional + total station measurement method, it has higher operating efficiency and obvious advantages, and the work intensity of field personnel is also greatly reduced. A variety of results are also available, including three-dimensional models, longitudinal sections, over- and under-excavation balances, and orthophoto expansions.