Precise locating detecting method for truss girder

Abstract

The invention relates to a precise locating detecting method for a truss girder. The method includes the steps: building a controlling net meeting requirements of truss girder design and measurement standard; selecting a measurement instrument as a total station; building a space polar coordinate system; calculating truss girder detecting point design value: an azimuth alpha 1, a vertical angle beta 1 and a horizontal distance l1; a truss girder detecting point is first aligned to a support center; height difference between the support center and a corresponding top face of a lower chord is measured and adjusted to design height difference value; whether the truss girder is located horizontally and correctly is judged according to deviation between the design value and actual value of azimuth and between the design value and the actual value of the horizontal distance of a setting point of the truss girder detecting point, and the truss girder detecting point is adjusted to a design position; and a jack is adjusted so as to enable the truss girder to fall back to design elevation and be located. The precise locating detecting method for the truss girder is high in detecting efficiency and precision, reliable in result, especially suitable for locating detection of truss girders which are small in bent radius and various in linear structures.

Description

technical field [0001] The invention relates to a bridge detection method, in particular to a truss girder accurate detection method. Background technique [0002] At present, the detection method of truss girder, due to the requirement of precision, generally uses the total station to detect its plane position and the level to detect its elevation respectively. The specific detection methods include: Cartesian coordinate method, distance intersection method, angle intersection method , plane polar coordinate method, etc. When the truss bridge is in a mountainous area, if a level is used, the height difference between the known leveling point and the point to be measured must not be too large, but the environment in the mountainous area is complex, and the bridge line structure is diverse, so it is difficult to meet the use conditions of the level; in addition, the Cartesian coordinate method Although the detection equipment used is a total station, the disadvantage is that...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing methods that cannot effectively and accurately detect truss beams with small bending radii and various linear structures, and provide a method with high efficiency, high precision and reliable results. An accurate in-position detection method for truss beams, especially suitable for in-position detection of truss beams with small bending radii and various linear structures

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