A steel bridge deck pavement structure and pavement method

Abstract

The invention discloses a steel bridge deck pavement structure. The steel bridge deck pavement structure is simple and reasonable in structure, a flexible connecting piece is low in shearing rigidity, good in anti-fatigue performance and constant in pull-out capacity and shearing strength, initial shearing rigidity is low, shearing force is kept around one third of the strength with continuous sliding deformation, shearing force value of local fittings can be effectively lowered, stress of bridge deck pavement layer close to rigid pillars is improved, crushing destruction of the bridge deck pavement layer is effectively avoided, the problem about local cracking of the surface of the pavement layer is solved, assumption of common design at present is met, and multiple pavement diseases and problems existing in the steel bridge deck pavement layer at present can be effectively solved. The pavement method is easy and convenient to operate, the pavement layer paved by a steel fiber reinforced concrete layer and an asphalt concrete layer form an integral, tensile capacity is increased, thickness is increased, tensile stress and tensile strain of the surface of the pavement layer can be effectively reduced, and the problem about cracking of the surface of the pavement layer can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction engineering, in particular to a steel bridge deck pavement structure and a pavement method. Background technique [0002] At present, in long-span bridges, orthotropic steel decks are gradually being widely used due to their light component weight, convenient transportation and erection, and short construction period. Most of the existing steel bridge decks use orthotropic steel bridge decks. In other words, longitudinal webs (longitudinal ribs) are welded on the bottom of the top plate of the steel bridge deck, and transverse diaphragms (transverse ribs) orthogonal to it are arranged in the longitudinal webs to form orthotropic structural plates. [0003] The bridge deck pavement is generally composed of a thin layer of reinforced concrete and asphalt concrete laid on the roof, and a steel mesh is laid inside the reinforced concrete. In the entire orthotropic steel deck structure, th...

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Problems solved by technology

In the entire orthotropic steel deck structure, the orthotropic structural slab is equivalent to a flexible support. Under the action of the vehicle load, the tensile stress at the local position of the bridge deck pavement reaches 3MPa-7MPa, which is difficult for ordinary reinforced concrete to meet the requirements.

[0004] Because the above-mentioned orthotropic steel bridge deck needs to be arranged with ordinary steel mesh, the manufacturing process is relatively complicated, and there is local stress concentration. Correspondingly, the tensile strain on the surface of the bridge deck pavement is too large, which easily leads to longitudinal and transverse cracking of the bridge deck pavement; 2. The durability of the bridge deck pavement is insufficient. The mixture is easy to creep, thus forming permanent deformation, which will develop into ruts after long-term accumulation; 3. The connection between the bridge deck pavement and the roof is relatively rigid, which may easily cause the concrete near the connection to be crushed and damaged in the early stage of stress ;4. The combination between the bridge deck pavement and the roof is inconsistent with the current usual design assumptions, and the simulation method between the two interfaces is controversial

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