Combined Steel Bridge Deck Pavement Structure

Abstract

The invention discloses a combined type steel deck pavement structure. The combined type steel deck pavement structure comprises a steel deck steel plate and is characterized in that a first modifiedepoxy resin layer, a first crushed-rock layer, a second modified epoxy resin layer, a second crushed-rock layer, a first waterproof adhesive layer, a waterproof structural layer, a second waterproof adhesive layer and a water drainage type wearing layer. According to the combined type steel deck pavement structure, the first modified epoxy resin layer, the first crushed-rock layer, the second modified epoxy resin layer and the second crushed-rock layer form a modified epoxy resin and crushed-rock combined connecting layer. The first waterproof adhesive layer, the waterproof structural layer, the second waterproof adhesive layer and the water drainage type wearing layer form an ultra high performance pavement (called UHPP for short ). According to the combined type steel deck pavement structure, through UHPP-ME, the slipping and delaminating between the structural layers are prevented; and the stability and durability of the structure are guaranteed.

Description

Technical field [0001] The invention relates to a cable load-bearing structure bridge, in particular to a steel deck paving structure of a large-span cable load-bearing structure bridge. Background technique [0002] In the past two decades, my country has built many large-span cable-bearing structural bridges. The main girder structure basically uses orthotropic steel panels and thin-layer paving to form the bridge crane structure. Orthotropic steel bridge deck structure is composed of transverse beams, longitudinal stiffeners and deck plates jointly supported by them. The elastic properties of the bridge deck structure are different in the transverse and longitudinal directions, and the stiffness of the bridge deck at different positions in the same direction is also different. These factors The unevenness of rigidity and deformation of orthotropic steel bridge deck is formed. In addition, because the special location of the pavement directly bears the combined effect of vehicl...

AI Technical Summary

Problems solved by technology

For the technical indicators of the aggregate, the construction site usually checks the physical indicators according to the relevant technical indicators of the "Highway Engineering Aggregate Test Regulations", and the adhesion to the epoxy asphalt binder can also be controlled according to the ordinary asphalt index (≥4). It is difficult for epoxy asphalt mixture to really meet the requirements; at the same time, there will be insufficient or unstable supply of material sources on site, resulting in large changes in the field use and testing of aggregates. Carry out system testing and rush construction

For the selection of slag powder, the physical indicators such as its fineness and hydrophobicity are mainly considered, and it is sufficient not to contain active lime, but there is no additional requirement for harmful impurities in it. If the slag powder is doped with metal minerals, it may be damaged by electrochemical reactions. Cause corrosion, weaken the integrity of the pavement structure, waterproof effect, and bring potential hidden dangers

In the existing single-layer crushed stone structure, the surface of the crushed stone cannot be completely covered by resin, the deformation of the steel bridge deck system is large, and the adhesion of the steel plate on the bridge deck is low. Insufficient, the durability of interlayer bonding is poor, which will cause delamination and slippage between the pavement layer and the bridge deck steel plate and damage it. In the presence of water, the steel plate will be corroded, which is extremely detrimental to the durability and safety of the bridge. Long-term practice has proved that , the bonding and protection between the bridge deck pavement and the bridge deck steel plate play a vital role in the success of the entire steel bridge deck pavement

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