Assembled steel-concrete combination structure bridge and construction method

Abstract

The invention relates to an assembled steel-concrete combination structure bridge. At least two prefabricated combination beams are jointed in the width direction of the bridge; each combination beam includes a concrete prefabricated bridge face plate and a steel beam for supporting the concrete prefabricated bridge face plate; a top flange steel plate positioned under the concrete prefabricated bridge face plate is arranged above the steel beam; shearing connection members for integrally connecting the concrete prefabricated bridge face plate and the top flange steel plate together are welded onto the top flange steel plate; longitudinal rib plates are arranged on edges of the top flange steel plate at two sides of the combined beam; and two adjacent combined beams are connected together through two adjacent rib plates. The invention also provides a construction method which can form an assembled steel-concrete combination structure bridge by performing bolting and cast-in-place joint concrete on prefabricated single combined beams. The assembled steel-concrete combination structure bridge is rapid and simple in construction, can avoid on-site modeling, and can avoid the problems of large area concrete cast-in-place, maintenance difficulties, and construction fractures.

Description

technical field [0001] The invention relates to an assembled steel-concrete composite structure bridge and a construction method thereof. Background technique [0002] Steel and concrete are the main structural materials for building bridges. These two materials have their own advantages and disadvantages in terms of physical and mechanical properties. Combining steel and concrete in a certain way can make full use of the traditional concrete structure and The advantages of the steel structure, while limiting the occurrence of its adverse effects, so as to make the best use of everything and maximize the strengths and avoid weaknesses. Steel-concrete composite beam is a kind of bridge structure that has been widely used in recent years and its technology is relatively mature. The construction of concrete slabs has an important impact on the bearing capacity and durability of composite girder bridges. At present, the construction of concrete slabs mainly includes the follow...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the drying shrinkage of concrete is constrained by steel beams and shear keys to produce tensile stress, which is easy to produce early construction cracks; due to the influence of environment, climate and other factors, the quality stability of cast-in-place concrete is worse than that of factory precast concrete slabs; Long construction period compared to prefabricated panel method

The disadvantages are: the gap filling between the precast concrete slab and the steel beam is relatively weak, which affects the durability of the structure; when the bridge is wide, the bridge deck should be divided into several pieces in the transverse direction, on the one hand, the amount of concrete cast in place increases , on the other hand, it increases the difficulty of installing precast slabs at the cantilever; precast concrete slabs and steel beams are anchored and combined by group nails, and the combined force effect is not as good as that of shear nails evenly arranged

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