Waterproof and anti-corrosion construction technology for steel box girder bridge deck paved with double-layer SMA (stone mastic asphalt)

Abstract

The invention discloses a waterproof and anti-corrosion construction technology for a steel box girder bridge deck paved with double-layer SMA (stone mastic asphalt). The technology comprises following steps: performing sandblast derusting on the steel box girder bridge deck; spraying an anti-corrosion coating; paving a waterproof layer; paving a first modified emulsified asphalt bonding layer; pouring an SMA10 asphalt concrete layer which is 4 cm thick; paving a second modified emulsified asphalt bonding layer; pouring an SMA13 asphalt concrete layer which is 4 cm thick. Compared with the prior art, one new paving construction technology is provided for the steel box girder bridge deck which is paved with the double-layer SMA and has a smaller area range; with the adoption of a coating-resistant ET material for paving the waterproof layer, project cost is reduced, and structural durability is improved; with the adoption of the construction technology, production cost can be saved, efficiency is improved, and quite good economic benefit is created.

Description

technical field [0001] The invention relates to the field of paving and waterproofing of steel box girders, in particular to a waterproof and anti-corrosion construction technology for paving double-layer SMA asphalt steel box girder bridge decks. Background technique [0002] Two layers of SMA modified asphalt mixture are directly paved on the urban steel box girder bridge deck, and the waterproof and anti-corrosion layer of the bridge deck is particularly important. The steel box girder pavement waterproof layer is an important structural layer that fixes the steel box girder steel plate and the bridge deck pavement as a whole, allowing the structure to bear the force together, and preventing the steel from being disturbed by the external environment and affecting the durability of the structure. The construction of this part mainly solves two problems: one is the waterproof problem, and the other is the bonding problem between the bridge deck and the asphalt pavement unde...

AI Technical Summary

Problems solved by technology

The construction of this part mainly solves two problems: one is the waterproof problem, and the other is the bonding problem between the bridge deck and the asphalt pavement under the harsh environment

At present, materials such as high-viscosity modified asphalt and epoxy waterproof are usually used as the waterproof and anti-corrosion layer of the bridge deck. For a long time, under the wet and cold weather conditions in winter, the bridge deck pavement waterproof layer is prone to delamination, shifting, wrapping and other diseases between the steel box girder deck and the asphalt layer

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