Object deformation monitoring method for tunnel construction, involves identifying auxiliary measuring point as deformation measuring point when deviations of coordinates between measuring points are smaller than defined tolerance value

摘要

The method involves detecting a zero measuring point (P0) in a zero measurement by a contactless polar measuring system (6), and transforming polar coordinates of the zero measuring point into a Euclidean reference coordinate system. Coordinates of an auxiliary measuring point are compared with the coordinates of the zero measuring point in axes of a main deformation coordinate system. The auxiliary measuring point is identified as a deformation measuring point when deviations of the coordinates between the auxiliary and zero measuring points are smaller than a defined tolerance value.