Fabricated combined bridge deck structure provided with grid type connector and construction method thereof

Abstract

The invention discloses a fabricated combined bridge deck structure provided with a grid type connector and a construction method thereof. The combined bridge deck structure is formed by assembling at least two steel plate-fiber concrete combined type components. Each steel plate-fiber concrete combined type component comprises a steel bridge deck slab located on the lower portion and prefabricated fiber concrete pieces poured on the steel bridge deck slab. One grid type connector is arranged in the butt joint area of every two adjacent steel plate-fiber concrete combined type components. The grid type connector comprises cast-in-place fiber concrete pieces and grid reinforcement components fixedly connected to the corresponding steel bridge deck. The grid reinforcement components is completely covered with the prefabricated fiber concrete pieces located on the two sides of the butt joint area and the cast-in-place fiber concrete pieces located in the butt joint area. The prefabricated fiber concrete pieces and the cast-in-place fiber concrete pieces are connected through the grid reinforcement components, so that an integrated fiber concrete layer is formed. The two adjacent steel bridge deck slabs are fixedly connected to form an integrated steel bridge deck slab layer.

Description

technical field [0001] The invention relates to a building detail of a bridge structure and its construction, in particular to an assembled composite bridge deck structure 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 7 is formed on the steel bridge deck layer 1, and reinforced steel bars 15 are prefabricated in the cast-in-place concrete pavement layer 7. Most of the existing conventional bridge deck cement concrete pavement adopts the cast-in-place construction method. Because the bridge deck concrete is easy to shrink and crack, the existing cast-in-place construction technology cannot guarantee the construction quality, and the maintenance of large-scale cast-in-place concrete is very difficult. The strength of concrete will be greatly red...

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 bridge deck concrete is easy to shrink and crack, the existing cast-in-place construction technology cannot guarantee the construction quality, and the maintenance of large-scale cast-in-place concrete is very difficult. The strength of concrete will be greatly reduced due to insufficient maintenance, which will greatly reduce the service life of the bridge deck pavement

In addition, due to the long time of cast-in-place construction and the late opening of traffic, this will further 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 overall 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 construction period is long, the production efficiency is low, and the production cost is difficult to control; Steam curing of 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 number of chloride ions in the air in marine environments, which affects the corrosion resistance of steel bars and the durability of cast-in-place concrete It is a great threat, and it is difficult to guarantee the performance of the fiber concrete layer after pouring

[0004] In addition, prefabricated steel-fiber-reinforced concrete composite bridge deck structures have also begun to appear in the prior art, but the existing prefabricated composite deck structures have excessive local stress at the joints, cracks in the pavement layer, and bridge deck structure The durability and anti-fatigue performance are difficult to meet the use requirements and other defects

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