Continuous steel beam installation linear control method

Abstract

The invention relates to the technical field of engineering construction assistance, in particular to a continuous steel beam installation linear control method which comprises the following steps: erecting a first section of a first main pier, arranging an observation pier G1 and an observation pier T1 on an upper chord and a lower chord of the first section respectively, arranging four control points corresponding to G1 are arranged on the upper layer of the tower column of the first main pier, four control points corresponding to T1 on the lower layer of the tower column of the first main pier, and determining coordinates of all the control points; erecting the first section of the second main pier, G2 and T2 and a control point in the same manner as the first main pier, and determining coordinates; and when each steel beam section is subsequently assembled, after coordinates of G1, T1, G2 and T2 are determined through control points, performing lower chord linear control by taking T1 and T2 as a station point and a rear view point, and performing upper chord linear control by taking G1 and G2 as a station point and a rear view point. The problem that in the prior art, due to the fact that measurement standards are not uniform and the height difference of upper and lower chords is large, continuous steel beam installation linear measurement is not accurate can be solved.

Description

technical field [0001] The invention relates to the technical field of engineering construction assistance, in particular to a method for controlling the installation alignment of continuous steel beams. Background technique [0002] The bridge spans of domestic road-rail dual-purpose bridges or double-deck highway bridges are getting larger and larger. When the bridge type adopts suspension bridges or cable-stayed bridges, the superstructure is usually designed as multi-span continuous steel truss girders, box-truss combined girders and other structural forms. In the steel girder cantilever assembly stage, it is necessary to ensure that the centerline of the steel girder is consistent with the center line of the line, and to ensure that the relative relationship between the various sections of the steel girder is accurate, so as to realize the smooth closing of the steel girder erection. In order to improve the measurement accuracy of steel beam alignment monitoring data an...

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Problems solved by technology

[0007] Aiming at the defects existing in the prior art, the object of the present invention is to provide a method for controlling the installation line shape of continuous steel girders, which can solve the problem of continuous steel girder installation in the prior art due to inconsistent measurement standards and large height differences between the upper and lower chords. The problem of inaccurate linear measurement

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