| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel deformation measuring apparatus, capable of measuring the deformation regardless of the shape of the cross section, even if there is no data indicating the cross-sectional shape before the deformation.SOLUTION: An axial setter 3 extracts the axis 10 of the tunnel from point group data 6 stored in a memory 1. A cross section setter 4 determines the cross section of the tunnel based on a projection pattern of the point group projected in parallel with the axis 10 to the surface orthogonal to the axis 10. A reference surface setting device 2 sets, as a reference surface 14, the surface where the cross section is swept in the direction of the axis 10. A deformation calculation device 5 calculates, as the deformation of the point, the difference between any point of the point group data 6 and the reference surface 14. |
