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Method for manufacturing hyperbolic all-welded structural steel truss girder

An all-welded structure and manufacturing method technology, applied in bridges, truss bridges, bridge forms, etc., can solve the problems of lofting of main truss members, difficult manufacturing, large welding workload of steel beams, and many types of welded joints, etc. The manufacturing quality is easy to control, the nesting time is reduced, and the nesting personnel input is reduced.

Inactive Publication Date: 2020-04-17
CHINA RAILWAY JIUJIANG BRIDGE ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the upper and lower decks are on vertical curves, and the vertical curves of the upper and lower decks are not parallel, resulting in unequal truss heights, almost every main truss member has different structural dimensions and is theoretically in a double twisted state. The beam adopts a fully welded steel truss structure with integral joints, so the lofting and manufacturing of the main truss members is very difficult
The steel girder adopts the construction technology of all-welded joints and on-site scattered girders. The steel girder has the problems of heavy welding workload, many types of welded joints, and large welding deformation

Method used

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  • Method for manufacturing hyperbolic all-welded structural steel truss girder
  • Method for manufacturing hyperbolic all-welded structural steel truss girder
  • Method for manufacturing hyperbolic all-welded structural steel truss girder

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] like Figure 1 to Figure 2 As shown, the invention provides a method for manufacturing a hyperbolic fully welded structural steel truss beam, comprising:

[0030] S1, set up the rod-assembled tire frame, which is used as the trial assembly model of the truss;

[0031] The trial assembly of the trusses in the factory is carried out on the special tire frame. During the assembly process, key points such as truss height, diagonal difference, camber, and plane alignment are strictly controlled. When the trusses are assembled, the matching between adjacent small segments is done to ensure that the bridge The position erection rods are accurately positioned and the steel truss girders are ac...

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Abstract

The invention discloses a method for manufacturing a hyperbolic all-welded structural steel truss girder, which belongs to the field of bridges and is characterized by comprising the following steps of: erecting a rod piece assembly jig frame serving as a truss piece trial assembly model; continuously paving a bottom plate unit piece on the jig frame, uniformly welding a plurality of transverse partition plates on the bottom plate unit piece from a reference end, welding web plate units on the two sides of each transverse partition plate, and paving a top plate on the upper parts of the web plate units; assembling bridge deck joints at the back-to-back ends of the upper chords and the lower chords, and inserting the opposite ends of the upper chords and the lower chords into web members for joint assembly, wherein truss nodes of the steel truss girder serve as control points of the lower chords, the chords between the nodes replace curves with straight chords, and pressing the web units at the center lines of the nodes of the whole web units to be bent gently and in smooth transition. The main truss chord member is converted from a hyperbolic theoretical state to a plane single bevel state, so that the manufacturing difficulty is reduced, the stress is clear by a structure of replacing a curve with a straight structure, and the manufacturing quality is easy to control.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a method for manufacturing a hyperbolic all-welded structural steel truss girder. Background technique [0002] Hyperbolic steel truss girders are widely used in urban bridges because of their novel structure design and beautiful shape. The plane design of the bridge road is straight line + curve, and the facade is designed as a vertical curve. Because the upper and lower decks are on vertical curves, and the vertical curves of the upper and lower decks are not parallel, resulting in unequal truss heights, almost every main truss member has different structural dimensions and is theoretically in a double twisted state. The beam adopts a fully welded steel truss structure with integral joints, so the lofting and manufacturing of the main truss members is very difficult. The steel girder adopts the construction technology of all-welded joints and on-site scattered girders. The st...

Claims

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Application Information

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IPC IPC(8): E01D6/00E01D21/00
CPCE01D6/00E01D21/00
Inventor 付建辉李敏王勋戢玉东周浩朱东明王员根王中美
Owner CHINA RAILWAY JIUJIANG BRIDGE ENG
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