Fabricated fibrous concrete combined deck structure and construction method thereof

Abstract

The invention discloses an assembled fiber concrete composite bridge deck structure and a construction method thereof. The composite bridge deck structure comprises a steel bridge deck layer, an assembled fiber concrete layer is covered above the steel bridge deck layer, and the assembled fiber concrete layer The main body is a cast-in-place fiber concrete layer, in which a number of prefabricated fiber concrete slabs are embedded. Around the prefabricated fiber concrete slabs, there are tongue-and-groove joints occluded in the cast-in-place fiber concrete layer, and steel bars are also provided. The construction method of the present invention comprises the following steps: first make the steel bridge deck layer, then make the prefabricated fiber concrete slab and lay it; or prefabricate the steel bridge deck block and the fiber concrete slab first, and then erect the assembled steel girder; The fiber-reinforced concrete layer is poured, the surface is treated, and the construction is finally completed. The combined deck structure of the invention can increase the ultimate tensile strength of the concrete slab, effectively prevent cracks in the pavement layer, has good durability, good fatigue resistance, and the construction process is simple and efficient.

Description

technical field [0001] The invention relates to a building detail of a bridge structure and its construction, in particular to a combined deck structure of a steel bridge and its construction method. Background technique [0002] The existing steel bridge cement concrete bridge deck pavement adopts the integral cast-in-place construction method, such as figure 1 As shown, after the construction is completed, a cast-in-place concrete pavement layer 6 is formed on the steel bridge deck layer 1 , and steel bars 2 are prefabricated in the cast-in-place concrete pavement layer 6 . Most of the existing conventional bridge deck cement concrete pavement adopts the cast-in-place construction method. Because the concrete is easy to shrink and crack, the existing cast-in-place construction technology cannot guarantee the construction quality, and the maintenance of large-area cast-in-place concrete is very difficult. It will be greatly reduced due to insufficient maintenance, which wi...

AI Technical Summary

Problems solved by technology

Most of the existing conventional bridge deck cement concrete pavement adopts the cast-in-place construction method. Because the concrete is easy to shrink and crack, the existing cast-in-place construction technology cannot guarantee the construction quality, and the maintenance of large-area cast-in-place concrete is very difficult. It will be greatly reduced due to insufficient maintenance, which will greatly reduce the life of the bridge deck pavement

Moreover, the cast-in-place construction takes a long time and the traffic opening time is late, which will affect the local traffic conditions and economic development

[0003] With the development and progress of material science, ultra-high performance fiber concrete has appeared in the field of bridge construction. Although the bridge deck structure obtained after fiber concrete construction has obvious advantages, the existing bridge deck pavement The integral cast-in-place construction method, there are many problems in pouring fiber concrete on the bridge deck through the integral cast-in-place construction method: for example, the existing engineering construction period is long, the production efficiency is low, and the production cost is difficult to control; Steam curing of poured concrete slabs is difficult; both steel bars and fiber concrete are vulnerable to the adverse effects of the environment, and are highly sensitive to the environment, especially the presence of a large amount of chloride ions in the air in marine environments, which affects the corrosion resistance of steel bars and the performance of cast-in-place concrete. Durability is a great threat, and it is difficult to guarantee the performance of the fiber concrete layer after pouring

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