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

Abstract

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 not need back view point station building, and is lower in operation difficulty; the operation error-tolerant rate is high, if errors occur in the operation process, control point checking can be continued only by readjusting bubbles of the total station without aligning a 'rear view point', and the operation error-tolerant rate is high; and the construction efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a construction method for controlling the perpendicularity of thin-walled piers with equal cross-sections based on the two-point horizontal distance method. Background technique [0002] Hollow thin-walled piers are widely used in vertical load-bearing members of bridges due to their high rigidity and strength, low self-weight, and large section modulus. In the construction of thin-walled piers, the relevant codes have clear requirements for the verticality of hollow thin-walled piers. If the verticality deviation exceeds the allowable value of the code, it needs to be reworked, which consumes a lot of manpower and material resources. [0003] In the traditional verticality control method, four control points are mainly selected on the formwork of the thin-walled pier, and then the four control points of the design coordinates are staked out by using the "s...

AI Technical Summary

Problems solved by technology

[0005] (1) The temperature change of the day is too high, exceeding the bubble compensation function, resulting in misalignment of the bubbles;

[0006] (2) The impact of passing vehicles on the ground makes the ground vibrate, affects the stability of the total station, and causes the bubbles to be misaligned;

[0007] (3) The technician touched the tripod of the total station by mistake, causing the air bubbles to be misaligned

[0008] When the above three factors occur, re-checking is required, which is time-consuming and labor-intensive.

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