Waterproof protection layer and construction technology of railway steel bridge deck under direct action of ballast
A protective layer and steel bridge deck technology, which is applied in bridges, bridge parts, bridge construction, etc., can solve the problems of unfavorable long-span railway bridge stress and design, poor interlayer adhesion, and enlarged bridge deck. , to achieve the effect of high ballast puncture ability, easy repair and fast solidification speed
Active Publication Date: 2015-08-19
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology
This type of steel bridge deck waterproof protection system has a complex structure, each layer is made of different materials, the construction of each layer is cumbersome, the adhesion between the layers is poor, the weight is heavy, and the bridge deck is prone to damage, and the bridge deck is enlarged. Conducive to the force and design of long-span railway bridges
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[0014] The present invention will be further described below in conjunction with accompanying drawing:
[0015] Such as figure 1 The waterproof and protective layer of the railway steel bridge deck under the direct action of the ballast shown in the figure includes the primer layer 2, the waterproof layer 3, the protective layer 4 and the anti-skid layer 5 which cover the base surface 1 in sequence, the materials of the primer layer and the waterproof layer And protective layer materials are MMA resin liquid.
[0016] The construction technology of the waterproof and protective layer of railway steel bridge deck under the direct action of ballast includes the following steps:
[0017] (1) Remove the grease, paint, rust spots, etc. attached to the steel base surface, and sweep away the dust. The treated steel base surface is clean, free of water, grease or any pollutants, with a cleanliness of Sa2.5 and a roughness of 50-100 μm .
[0018] (2) Mix and stir the MMA resin liqui...
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The invention belongs to the technical field of bridge floors, and specifically relates to a waterproof protective layer of a railway steel bridge floor under direct action of a railway ballast and a construction process of the waterproof protective layer. The waterproof protective layer comprises a base coat, a waterproof layer and a protective layer, all of which cover a base surface, wherein the base coat is made from MMA-I type resin liquid, the waterproof layer is made from MMA-II type resin liquid, and the protective layer is made from MMA-III type resin liquid. The waterproof protective layer of the railway steel bridge floor under the direct action of the railway ballast, disclosed by the invention, has the advantages of small thickness and dead weight, strong binding force with a steel base surface, large railway ballast puncture force resistance, good impermeability, convenience in construction, high solidification speed and short spraying period; the traditional protective layer or a railway ballast slot is canceled, and an additional steel-structure anti-corrosive coating system is not needed; and therefore, the structure design optimization is facilitated, the anti-corrosion capability of a steel bridge surface is improved, the engineering cost is saved, the construction cost is reduced and the social and economic benefits are high.
Description
technical field [0001] The invention belongs to the technical field of bridge decks, and in particular relates to a waterproof protective layer of a railway steel bridge deck under the direct action of ballast and a construction process. Background technique [0002] The protective waterproof layer of the bridge deck is an important technical means to improve the durability of the bridge. In the prior art, the steel bridge deck protection system generally consists of three parts: an anti-corrosion layer, a waterproof layer and a protective layer, and ballast acts on the protective layer. In the current steel bridge deck protection system, the anti-corrosion layer is generally steel structure anti-corrosion coating paint, the waterproof layer is generally made of waterproof coils or coatings, and the protective layer is usually concrete ballast grooves. This type of steel bridge deck waterproof protection system has a complex structure, each layer is made of different materi...
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IPC IPC(8): E01D19/08E01D21/00
Inventor 罗世东廖祖江夏正春瞿国钊康小英
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP