Construction method for controlling perpendicularity of uniform-section thin-wall pier based on two-point horizontal distance method

The invention relates to a construction method for controlling the perpendicularity of a uniform-section thin-wall pier based on a two-point horizontal distance method. The construction method comprises the steps of S1, setting base points, specifically, setting a base point at each of the two sides of the thin-wall pier; s2, determining the horizontal distance of each point: calculating the horizontal distance from each base point to each control point on CAD software according to the coordinates of the 1 # base point and the 2 # base point and the design coordinates of four control points, namely a 1 # control point, a 2 # control point, a 3 # control point and a 4 # control point, on the thin-wall pier; and S3, performing template checking though the two-point horizontal distance method. The method has the advantages that the operation difficulty is low, and compared with a traditional observation station orientation lofting function, the method only needs bubble centering and datum point centering, does n