Prefabricated steel highway bridge

Abstract

The invention discloses a prefabricated steel highway bridge, which comprises steel trusses and a big beam mounted between the steel trusses. The steel truss comprises an upper chord member, a lower chord member, and vertical bars supporting between the upper chord member and the lower chord member in a spaced manner. A rhombic supporting frame is arranged inside a rectangular frame which consists of the two adjacent vertical bars, the upper chord member and the lower chord member, wherein the rhombic supporting frame consists of four sloped bars respectively fixed at the centers of the upper and lower chord members and the vertical bars. A clamping member for internally clamping two adjacent sloped bars through fastening bolts and forming a supporting plane between the two sloped bars is arranged on the lower chord member at the bottom of the rhombic supporting frame, and the big beam is horizontally placed on the supporting plane. Two U-shaped bolts with downwardly oriented openings are arranged on two sides of the lower chord member so that the big beam, the clamping member and the lower chord member are connected together, and a connector for connecting the two U-shaped bolts together is arranged at the bottom of the lower chord member. The invention has the following advantages: a smart fixing manner is designed based on a steel truss of a traditional structure so that the prefabricated steel highway bridge floor is widened.

Description

technical field [0001] The invention relates to an assembled highway steel bridge, in particular to an assembled highway steel bridge with a large beam bearing capacity. Background technique [0002] The prefabricated highway steel bridge is a common temporary bridge facility. It is not limited by the bridge type. The standardized girders can be constructed in parallel at multiple points. It has the characteristics of light weight, large bearing capacity and fast construction speed. The beam of the traditional prefabricated highway steel bridge is erected between the vertical bars and oblique bars of the trusses on both sides, and the beam and the truss are connected together by positioning pins. As the height of the supporting beam is limited by the installation space, it is difficult to install the beam and the design bearing capacity is small. Under normal circumstances, the allowable clear width of the bridge deck of the steel bridge is only 3.7 meters. The narrow deck w...

AI Technical Summary

Problems solved by technology

Because the height of the supporting beam is limited by the installation space, it is difficult to install the beam and the design bearing capacity is small. Under normal circumstances, the allowable clear width of the steel bridge deck is only 3.7 meters. The narrow deck width results in insufficient vehicle traffic capacity. In the event of disasters or other emergencies, emergency rescue vehicles or large transport vehicles with special equipment cannot pass smoothly

[0003] Chinese utility model patent (Patent No.: 201120030406.6) discloses a "truss of assembled steel bridge", which solves the problem of small installation space for the traditional assembled highway steel bridge beam, but has the following shortcomings in practical application: 1. Some steel trusses of traditional structure cannot be used directly, and steel trusses must be remade, which increases the production and use costs of highway steel bridges; 2. There are no corresponding matching beams and fixed connection devices between beams and steel trusses, It needs to be designed separately when used; 3. The scope of use is narrow and not universal

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