Experiment and Application of NATM Tunnel Deformation Monitoring Based on 3D Laser Scanning

In recent years, 3D laser scanning technology has been applied to tunnel engineering. Although more intelligent than traditional measurement technology, it is still challenging estimate the real-time deformation of NATM excavation from detection and ranging point clouds. To further improve accuracy in construction process, this paper proposes an improved Kriging filtering algorithm. Considering spatial correlation described object, optimization method cloud grid studied. By analyzing full-space field lining, information measuring points on surface lining extracted. Based actual project, through on-site monitoring comparison test, three-dimensional data are processed analyzed, obtained test compared with measured by methods. The experimental results show that algorithm can not only efficiently identify extract profile visualization but also accurately obtain deformation. using proposed good agreement those Therefore, based better reflect evolution under certain environmental conditions provide effective safety warning for construction.