Bridge deck pavement structure for orthotropic steel bridge

Abstract

The invention discloses a bridge deck pavement structure for an orthotropic steel bridge. The pavement structure comprises a mica-containing epoxy anti-corrosion layer, a solvent-free epoxy resin water-proof layer, a hot melt particle bonding layer, a high-elasticity modified asphalt pavement lower layer, a modified emulsified asphalt bonding layer and a high-elasticity modified asphalt pavement upper layer from bottom to top, wherein the total pavement thickness is 6-8 centimeters; the hot melt particles are high-polymer particles of which the softening point is greater than 150 DEG C; the high-elasticity modified asphalt is modified asphalt of which the elastic recovery is over 95 percent at 25 DEG C; the pavement lower layer is formed by paving a fine-particle asphalt mixture prepared by mixing the high-elasticity modified asphalt with a mineral mixture; the pavement upper layer is formed by paving a fine-particle or medium-particle asphalt mixture prepared by mixing the high-elasticity modified asphalt with the mineral mixture. By adopting the pavement structure, the water-proof layer and the asphalt pavement layer are combined integrally through the hot melt particle bonding layer, so that the shearing strength and durability of the pavement structure are ensured.

Description

technical field [0001] The invention relates to the field of transportation engineering, in particular to a deck pavement structure of an orthotropic steel bridge. Background technique [0002] Steel bridge deck pavement is a single-layer or double-layer structure that is laid on the steel bridge deck to protect the steel plate and ensure the driving requirements of the car, with a thickness of about 40-80mm. It is generally composed of anti-rust layer, waterproof adhesive layer, pavement layer and so on. Under the influence of comprehensive factors such as driving load, wind load, temperature change and local deformation of the steel bridge deck, its force and deformation are far more complicated than that of road pavement or airport pavement, so it has great influence on its strength, deformation characteristics, temperature stability and fatigue durability. Sex and so on have higher requirements. At the same time, due to the special location of the pavement, special req...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the difficulty of bridge deck pavement construction of existing orthotropic steel bridges, high initial investment, high maintenance and repair costs in the later period, and the existing waterproof bonding system is not resistant to high temperature and has insufficient toughness , cannot be firmly bonded to the steel plate surface and the pavement layer, and the pavement structure cannot well meet the requirements of high temperature stability, low temperature deformation ability and fatigue cracking resistance during use, providing an orthotropic steel bridge Bridge deck pavement structure and pavement method

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