Asphalt-free steel-RPC (reactive powder concrete) combined deck structure and construction method thereof

Abstract

The invention relates to an asphalt-free steel-RPC (reactive powder concrete) combined deck structure. The asphalt-free steel-RPC combined deck structure comprises a steel bridge deck slab. An RPC layer is laid on the steel bridge deck slab. A reinforcing mesh composed of crisscross reinforcement is disposed in the RPC layer. Shear-resistant connectors are disposed on the combining surfaces of the RPC layer and the steel bridge deck slab. The invention further relates to a construction method of the asphalt-free steel-RPC combined deck structure. The asphalt-free steel-RPC combined deck structure has the advantages of high bearing capacity, high rigidity, low self-weight, high fatigue resistance, high durability and the like. Defects of the traditional asphalt concrete pavement layer such as push, bulging and cracking can be avoided. Paving a waterproof layer and an asphalt concrete layer is avoided. The asphalt-free steel-RPC combined deck structure is convenient to construct.

Description

technical field [0001] The invention relates to a bridge deck structure composed of asphalt-free steel and RPC and a construction method thereof, belonging to the technical field of civil engineering. Background technique [0002] At present, most of the steel bridge decks that have been built or are under construction use orthotropic steel decks. In order to protect the steel plate and provide good driving performance, it is necessary to lay a pavement 2 on the orthotropic steel bridge deck 1, such as figure 1 shown. Bridge deck pavement is an important part of bridge traffic system, and its condition directly affects traffic safety, comfort and bridge durability, as well as investment and social benefits. The traditional pavement layer 2 material usually adopts thermoplastic or thermosetting asphalt concrete (such as: cast asphalt concrete, modified dense graded asphalt concrete, epoxy asphalt concrete, asphalt mastic concrete, etc.), and the pavement layer 2 is bonded b...

AI Technical Summary

Problems solved by technology

However, since the elastic modulus, thermal conductivity, and thermal expansion and contraction coefficients of the steel bridge deck 1 are quite different from those of the asphalt concrete pavement layer 2, it is easy to cause the gap between the steel bridge deck 1 and the asphalt concrete under the action of a large temperature difference. When the cohesive force fails, the two will slide relative to each other, which will cause the bridge deck pavement layer 2 to suffer from diseases such as pushing, choking, and cracking

The disease of the pavement layer 2 of the bridge deck will not only further accelerate the damage of the pavement layer 2 (rainwater penetrates into the pavement layer structure through the cracks), but also shorten the service life of the bridge in severe cases (the damage of the pavement layer 2 will lead to The vehicle impact load borne by the steel bridge deck 1 increases significantly, which causes or accelerates the fatigue failure of the welded part of the steel bridge deck 1 and the longitudinal stiffener 3)

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