Long-span assembly type road steel truss bridge

Abstract

The invention discloses a long-span assembly type road steel truss bridge which can be erected across the 90m span. The long-span assembly type road steel truss bridge comprises a left truss and a right truss. Beams are arranged between the left truss and the right truss. Wind resistance pull rods and a vertical wind structure are arranged between every two adjacent beams. A bridge face board is arranged on the beams. Reinforcing chord members are arranged on upper chords and lower chords of the trusses. The long-span assembly type road steel truss bridge is characterized in that the distance between pin holes in the height direction of each truss ranges from 2400 mm to 2800 mm, and the distance between pin holes in the length direction of each truss ranges from 5800 mm to 6000 mm; the chord member sections of upper chord members, lower chord members, vertical rods, inclined rods and the reinforcing chord members of the trusses are square pipes or rectangular pipes, and the problems that an existing assembly type steel bridge is small in span and large in deflection are solved.

Description

Technical field [0001] The invention relates to an assembled highway steel bridge, in particular a large-span assembled highway steel truss bridge. Background technique [0002] At present, the existing prefabricated highway steel bridges generally have a maximum single-span span of 50 meters. If a larger span is required, temporary steel buttresses must be added. However, in deep-flowing rivers or deep ravines in between. Under such terrain conditions, the construction of temporary bridge piers is costly and has a long period. The existing prefabricated highway steel bridges cannot meet the needs of users. [0003] For example, in February 2013, half of the lanes of the Yichang Bridge of Henan Lianhuo Expressway collapsed and traffic was not smooth. The bridge piers were as high as tens of meters. It was necessary to build a single-span bridge of 80 meters, and it had to be opened to traffic within one week. There are bridge equipment that cannot meet the requirements. After m...

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Problems solved by technology

[0003] For example: In February 2013, half of the lane of the Yichang Bridge on the Lianhuo Expressway in Henan collapsed. The traffic was not smooth, and the pier was tens of meters high. It was necessary to rush to build a bridge with a single span of 80 meters, and it needed to be opened to traffic within a week. Some bridge equipment cannot meet the requirements. After multiple inspections and expert evaluation, it is only allowed to pass in the other half of the lane with speed limit and weight limit, which seriously affects festival traffic.

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