Basket-style steel box arch rib production method

Abstract

The invention relates to a basket-style steel box arch rib production method, which is characterized in that the specific manufacturing method is as follows: S1 arch rib three-dimensional layout and construction drawing drafting; S2 precise cutting and scribing; S3 arch rib assembly; and S4 box model welding. In the four steps, an entire basket-style steel box arch rib is subjected to three-dimensional layout and is unfolded into a plane to draft a construction drawing and special-shaped parts in the planar state are obtained through precise blanking, the key to the control of the process is ''precision'', that is, the shape of each part must be precise; and the linear shape of each splicing unit is controlled on a bed-jig and correction is carried out in the assembly process to complete the assembling and welding of each segmental unit of the basket-style steel box arch rib, the key to the control of the process is ''clinging'' and ''abutting'', that is, the edge of a part and the space position of assembled members are taken as a base, and the linear shape of a subsequent member is clung and abutted to the assembled members to obtain a precise linear shape. The basket-style steelbox arch rib production method reduces the technical preparation cycle of the processing and assembly of space special-shaped structures and reduces the difficulty in linear shape control during manufacturing installation.

Description

technical field [0001] The invention relates to the field of bridge manufacture, in particular to a method for manufacturing an arch rib of a basket-type steel box. Background technique [0002] The steel structure of the main bridge of Lingbo Bridge in the first phase of Yangzhou Ancient Canal Reconstruction Project is a basket-type variable-section steel box arch bridge. The single-sided arch rib is divided into 16 segments, from the G1 segment of the arch top to the G8 segment of the arch foot, which are symmetrical Arrangement, the arch rib section is a single-chamber steel box with equal width and variable height, the width is 2.5m, and the height gradually changes from 4.5m in the middle of the span to 3.346m, and then gradually changes to 3.623m. The bridge adopts basket-type double arch ribs, the arch ribs are inclined to the center in the direction of the transverse bridge, and arched in the direction of the longitudinal bridge. , a total of 16 in the cross-section...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for manufacturing the arch rib of a basket-type steel box, which can solve the problem that the top and bottom webs, partitions and various stiffening plates of the general steel box arch rib of the basket-type steel box are all space-shaped structures, and Each segment of the arch rib is different, resulting in a long technical preparation period and difficult linear control during manufacturing and installation.

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