Steel box girder installation system and construction method thereof

Abstract

The invention relates to a steel box girder installation system which includes supporting foundations, temporary supports, a Bailey beam, a roller system, rollers, box iron, bolts, a gantry crane, pushing gears, jacks and supporting seats. Supporting piers are arranged on the two sides of a highway which is spanned, the pushing gears are arranged on the outermost supporting piers correspondingly,and the pushing gears are arranged symmetrically about the highway which is spanned. The supporting foundations and the temporary supports are arranged on a central isolation belt, road shoulders andthe two sides of the highway which is spanned, the Bailey beam is erected on the upper parts of the temporary supports, the upper end of the Bailey beam is connected with the roller system by the bolts, the roller system is mainly composed of the rollers and the box iron, and the rollers are evenly distributed between two rows of the box iron. Steel box girder units are placed on the upper parts the rollers, and the steel box girder units are connected to form a steel box girder. The jacks or the supporting seats are arranged between the steel box girder and the supporting piers. The steel boxgirder installation system has the beneficial effects that the roller system is installed on the Bailey beam, and the pushing resistance is reduced, so that a certain protection role is played on theexisting supporting piers.

Description

technical field [0001] The invention relates to the technical field of steel box girder installation, in particular to an installation system and a construction method for a super-large / ultra-large-span steel box girder. Background technique [0002] With the increase of road traffic demand in our country, the elevated road system has developed rapidly, and the expressway, main road or expressway composed of elevated roads plays a pivotal role in road traffic. At present, among the bridge projects in China, the number of concrete structures is the majority, and the overpass bridges with large and medium spans mostly use prestressed concrete technology to obtain greater spanning capacity. However, with the development of my country's iron and steel industry and steel structure technology, the number of steel structure bridges is also increasing. The box-shaped section has a large torsional rigidity and good integrity, which makes the steel box girder structure widely used in ...

AI Technical Summary

Problems solved by technology

However, first connecting the steel box girders with the suspended ceiling and then using connecting components to connect the steel box girders consumes manpower and material resources and increases the difficulty of construction; moreover, the steel box girders will cause greater friction and damage to the contact beams, making the steel box Reduced beam life

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