CALCULATION METHOD FOR MEASURING FLATNESS OF CROSS-SECTION OF TUNNEL SEGMENT BASED ON SPATIAL POINT-TO-PLANE RELATION

• Main Authors: XU, Qing, WU, Yi, MIAO, Yuanquan, PANG, Jingdun, ZHOU, Jiandong, SONG, Weihao, HE, Yanxing, ZHANG, Hongsheng
• Format: Patent
• Language: Chinese; English; French
• Published: 22.12.2022
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

A calculation method for measuring the flatness of the cross-section of a tunnel segment based on the spatial point-to-plane relation, comprising the steps of: mounting: mounting a plurality of laser displacement sensors on a propulsion cylinder assembly plane of a tunnel boring machine, an emitting laser beam of each sensor being parallel to an axis of a cylinder, being perpendicular to the propulsion cylinder assembly plane, and pointing to the end surface of a segment ring to be tested; arranging: the intersection of the straight line where the laser of each laser displacement sensor is located and the propulsion cylinder assembly plane is referred to as a base point Pi; the intersection formed between the laser of each laser displacement sensor and the end surface of said segment ring is referred to as a measurement point P'i; the corresponding spatial coordinates of each base point are represented by Pi(xi,yi,zi); the corresponding spatial coordinates of each measurement point are represented by Pi'(xi',