Fabricated fibrous concrete combined deck structure and construction method thereof

Abstract

The invention discloses a fabricated fibrous concrete combined deck structure and a construction method thereof. The combined deck structure comprises a steel bridge deck layer, wherein a fabricated fibrous concrete layer covers the upper surface of the steel bridge deck layer; the main body of the fabricated fibrous concrete layer is a cast-in-situ fibrous concrete layer; a plurality of prefabricated fibrous concrete plates are in embedded connection with the cast-in-situ fibrous concrete layer; tongue-and-groove joints articulated with the cast-in-situ fibrous concrete layer are arranged at the periphery of each prefabricated fibrous concrete plate; and the fabricated fibrous concrete layer is equipped with steel bars. The construction method comprises the following steps: the steel bridge deck layer is manufactured at first, and then the prefabricated fibrous concrete plates are manufactured and laid, or steel bridge deck blocks are prefabricated at first, and steel beams are erected and assembled; after that, the construction of the cast-in-situ fibrous concrete layer and the surface treatment are carried out in sequence; and the construction is completed finally. The combined deck structure disclosed by the invention can improve the tensile strength limit of concrete slabs and effectively prevent a pavement layer from cracks, and has good service 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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