Steel truss girder assembly linear control method

Abstract

The invention relates to the technical field of engineering construction auxiliary equipment, in particular to a steel truss girder assembly linear control method which comprises the following steps: setting a starting point and an ending point of an initial longitudinal axis of a steel truss girder to be assembled, and setting four intervisible control points around a position to be assembled of the steel truss girder by taking the initial longitudinal axis as a reference; arranging an observation platform on the extension line of the initial longitudinal axis at a first set distance from the starting point, erecting a total station, observing the four control points in sequence, obtaining plane coordinates of the four control points, and establishing a steel truss girder assembly control network; and assembling the steel truss girder, and when each steel truss girder section is assembled, determining the coordinate of the observation platform based on the steel truss girder assembling control net, and then carrying out steel truss girder assembling jig frame linear measurement and lower chord linear measurement. The problems that geological sedimentation or foundation extrusion causes displacement of the observation platform, and assembly linear control is affected can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of auxiliary equipment for engineering construction, in particular to a method for controlling the assembly alignment of steel truss girders. Background technique [0002] The bridge spans of 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 a multi-span continuous steel truss structure. The erection of steel truss girders is mainly divided into construction methods such as loose assembly of members, assembly of truss pieces, and assembly of large sections. After the steel truss members are manufactured on the manufacturer's special tire frame, they need to be pre-assembled on the assembled tire frame. After confirming that the structural size and alignment meet the design requirements, they are decomposed into unit blocks or segments and transported to ...

AI Technical Summary

Problems solved by technology

[0008]Aiming at the defects existing in the prior art, the object of the present invention is to provide a steel truss girder assembly alignment control method, which can effectively solve the geological settlement of the steel truss girder assembly site Or the foundation is squeezed, which causes the displacement of the observation platform, resulting in a problem that affects the control of the steel truss girder assembly alignment

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