Fabricated construction method for single-pier steel bridge

Abstract

The invention discloses a fabricated construction method for a single-pier steel bridge, which comprises the following steps that a box body unit is manufactured, and the box body unit comprises a steel pipe pier column upper section, a pier top cross beam and two H-shaped main steel beam sections which are arranged in parallel; a temporary support frame is constructed; then sand boxes are placed at the four corners of the top face of the temporary supporting frame; a box body unit is assembled in a manner of being hoisted to the position between the two sets of temporary supporting frames, wherein the bottom face of the upper steel pipe pier column section and the top face of the lower steel pipe pier column section are in butt joint and welded; the bridge section is hoisted; and the sand box is unloaded. The steel bridge construction method has the advantages that when integral hoisting and construction are carried out on site, construction of a steel bridge can be achieved only by carrying out butt welding on the box body units, the lower section of the steel pipe pier column and the bridge section, on-site welding of a plurality of rib plates is avoided, the on-site welding amount is effectively reduced, and construction can be carried out under the condition that passing is not affected to a certain extent; in addition, the welding difficulty is effectively reduced, installation is convenient, and the welding seam quality during assembly is effectively guaranteed.

Description

Technical field: [0001] The present invention relates to the field of bridge construction, and more particularly to single prefabricated bridge pier steel Construction Method. Background technique: [0002] In recent years, the rapid development of bridge construction, steel bridge with its shock resistance, light weight, short construction period, etc., has been more and more applications; steel bridge piers which alone is an extremely ramp in municipal engineering common and cost-effective structure, in the conventional construction of the steel bridge, pier steel, steel beams and the main beam pier top three parts separately processed, the three parts need to be assembled on-site welding installation, since the steel pier, the steel main cross beams and pier top by three parts are connected to a large number of ribs, welding, resulting in numerous field welding seam workload; as figure 1 Field welding schematic configuration shown, reference numerals A1 to A16 are weld positio...

AI Technical Summary

Problems solved by technology

[0002] In recent years, my country's bridge construction has developed rapidly. Steel bridges have been used more and more because of their advantages such as good earthquake resistance, light weight, and short construction period. A common and cost-effective structural form. In traditional steel bridge construction, steel pipe pier columns, pier top beams and main steel beams are processed separately. During on-site installation, the three parts need to be assembled and welded. Because steel pipe pier columns, main steel beams The three parts of the beam and the cross beam on the top of the pier are connected by a large number of ribs. When welding, the number of welds leads to a large amount of welding work on site; figure 1 In the schematic diagram of the on-site welding structure shown, the labels A1 to A16 are the positions of the welds, that is, the number of on-site welding welds of the steel pipe pier column 7, the pier top beam 1.2 and the two H-shaped bridge sections 6 is as many as 16; the on-site assembly Welding is all high-altitude operations, there are major safety hazards, and the space on the working surface is small, the operation is difficult, the construction period is long, the weld flaw detection is difficult, and the quality of the weld is difficult to guarantee; , the full hall support is usually used as the supporting structure of the bridge, the construction is cumbersome, the construction period is long, and the cost is high

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