Abstract
The three dimensional deformation and corresponding temporal evolution of surrounding rock is a key information for tunnel stability analysis and safety warning. To reconstruct the 3D deformation process of tunnel based on point cloud data by laser scanning, a semi-automatic method is presented to align the point cloud data of the tunnel surfaces at different stages. This method includes three steps: (i) initial alignment, splitting, denosing and merging of the tunnel surface’s point clouds; (ii) coordinate transformation between the tunnel surface’s point clouds according to the arch’s geometric characteristics; and (iii) calculation and visualization of the tunnel surface’s sequential deformation based on the multiscale model cloud comparison algorithm. The technical application of the time-dependent deformation analysis for an experimental tunnel in a mine indicated that this method can not only fully expose the evolution process of tunnel surrounding rock deformation, i.e., the spatial inhomogeneity, partitioning and temporal characteristics, but also can warn instability of tunnel by discerning hot deformation islands, i.e., zones with relatively large deformation.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call