Steel-concrete composite beam with steel bar trusses and steel plates as temporary supports and construction method

Abstract

The invention discloses a steel-concrete composite beam with steel bar trusses and steel plates as temporary supports and a construction method. The steel-concrete composite beam comprises a concrete bridge deck, a plurality of steel longitudinal beams and a plurality of groups of steel cross beams, wherein the steel longitudinal beams and the steel cross beams are arranged below the concrete bridge deck; the plurality of steel longitudinal beams and the plurality of groups of steel cross beams are alternately arranged; the steel longitudinal beams are fixed to the concrete bridge deck through steel bar frame-thin steel plate structures arranged below the concrete bridge deck; gaps exist between the upper flange plates of the steel cross beams and the steel bar frame-thin steel plate structures; and the steel bar frame-thin steel plate structure comprises a plurality of thin steel plates, a plurality of transverse steel bar trusses, a plurality of post-installed annular steel bars and a plurality of longitudinal steel bars. During construction, the transverse steel bar trusses are welded and mounted; then the steel bar frame-thin steel plate structure sections are hoisted to form steel longitudinal beam-steel bar frame-thin steel plate structure combined sections; and the steel longitudinal beam-steel bar frame-thin steel plate structure combined sections are transported and installed, and finally bridge deck concrete is poured. The on-site high-altitude operation risk is further reduced, and the on-site construction speed is increased.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a steel-concrete composite beam temporarily supported by steel bar trusses and steel plates and a construction method. Background technique [0002] Existing steel-concrete composite beams (specifically) usually adopt the form of installing steel girders at the bridge site first, and then pouring concrete bridge decks, or first positioning steel beams on the pedestal, pouring concrete bridge decks, and then transporting and hoisting as a whole. bit form. [0003] There is a key process in the above-mentioned prior art, that is, pouring concrete bridge decks. In the construction of steel-concrete composite beams, it is usually necessary to set the bottom formwork as the precondition for the construction of the concrete bridge deck. [0004] There are 2 types of bottom formwork mentioned above: temporary formwork (wood formwork or steel formwork), permanent formwork (...

AI Technical Summary

Problems solved by technology

From the perspective of formwork manufacturing and engineering economy, the manufacture of steel structure bottom plate is more convenient, but the amount of steel used in the structure is relatively large, which is not economical; it is good

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