Rapid construction method for transverse partitioning and longitudinal sectioning of urban elevated steel box girder bridge

Abstract

The invention discloses a rapid construction method for transverse partitioning and longitudinal sectioning of an urban elevated steel box girder bridge. The rapid construction method particularly comprises the following steps: firstly, determining longitudinal sectioning and transverse partitioning cutting parts, and then, determining longitudinal cutting parts of a steel box girder; transversely partitioning the box girder according to the number of box chambers of the steel box girder, wherein each box chamber serves as a partition; splicing a hoisting unit on a jig, assembling a bottom plate, a transverse diaphragm, a web and a top plate in sequence, and welding the structures; and finally, carrying out hoisting and welding on the site. The hoisting process is carried out from top to bottom in height, from two sides to middle span in longitudinal bridge direction, and from middle to two sides in transverse bridge direction. The rapid construction method disclosed by the invention is capable of reducing the on-site construction time to the maximum limit and reducing the influence on the urban environment; and by virtue of longitudinal sectioning and transverse partitioning, the requirement for the hoisting capacity of hoisting equipment can be reduced, the difficulty of transporting large-section box girders in a city is reduced, and thus the rapid construction method is more suitable for construction of the urban elevated steel box girder bridge.

Description

technical field [0001] The invention relates to the rapid construction of urban elevated steel box girder bridges. The steel box girders are reasonably divided horizontally and vertically into sections, and hoisting units are prefabricated in a factory and hoisted and welded on site. Background technique [0002] Urban viaduct is the main means to solve the problem of urban traffic congestion. Among them, the steel box section is widely used in urban viaducts due to its high bending and torsional rigidity, light weight, and fast construction speed. However, the construction of urban viaducts is different from general bridge construction. Its construction site is often located in the bustling urban area, with heavy traffic, surrounded by schools, residences, commercial areas, etc., so the construction is often restricted by many factors. Due to the constraints of the site, large-scale hoisting equipment cannot be used, the lifting weight and the size of the hoisting objects ...

AI Technical Summary

Problems solved by technology

However, the construction of urban viaducts is different from general bridge construction. The construction site is often located in the bustling area of ​​the urban area, with heavy traffic, surrounded by schools, residences, commercial areas, etc., so the construction is often restricted by many factors.

Due to the constraints of the site, large-scale hoisting equipment cannot be used, the lifting weight and the size of the hoisting objects are limited, and it is difficult to transport large-section box girders in the city; due to traffic restrictions, certain traffic requirements must be met during the construction period; due to construction period restrictions, fast construction speed is required

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