Quick positioning and measuring method for steel anchor beam of cable-stayed bridge

The invention relates to the technical field of bridge construction measurement, and discloses a cable-stayed bridge steel anchor beam rapid positioning measurement method comprising the following steps: adjusting a steel anchor beam to a theoretical attitude; theoretical attitude coordinates of two anchoring points of the steel anchor beam and two cableway pipe outlet center points are recorded, more than three points are selected on the steel anchor beam to serve as reference points, first positioning coordinates of all the reference points are measured, and the relative geometrical relationship between all the reference points and the anchoring points and the relative geometrical relationship between all the reference points and the cableway pipe outlet center points are obtained; the steel anchor beam is placed in an anchoring area, theoretical positioning coordinates of all reference points are calculated according to theoretical installation coordinates of an anchoring point and a cableway pipe outlet c