Steel bridge deck pavement structure

Abstract

The utility model discloses a steel bridge deck pavement structure, which belongs to the technical field of road pavement, and comprises a steel plate, an anti-corrosion layer, a waterproof bonding layer, a pavement lower layer, an interlayer bonding layer and a pavement upper layer which are sequentially paved from bottom to top, the anti-corrosion layer is epoxy zinc-rich primer, the waterproof bonding layer is epoxy resin adhesive, and the interlayer bonding layer is epoxy resin adhesive. The pavement lower layer is made of epoxy asphalt concrete, the interlayer bonding layer comprises an epoxy asphalt adhesive, a glass fiber grating and broken stone, the pavement upper layer is made of modified asphalt concrete SMA, and the problems of high-temperature pushing, surface layer cracking and the like can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of road paving, and in particular relates to a steel bridge deck paving structure. Background Art

[0002] Steel bridge deck pavement refers to the pavement structure used to cover and protect the steel bridge deck. It must withstand traffic loads while protecting the steel deck from environmental factors such as temperature fluctuations, humidity, and corrosion. In recent years, steel bridge deck pavement structures composed of epoxy asphalt concrete and modified asphalt concrete (SMA) have commonly experienced problems such as interlayer shifting and surface cracking. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a steel bridge deck pavement structure to reduce defects such as interlayer displacement and surface cracking.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0005] The utility model includes a steel plate, an anti-corrosion layer, a waterproof bonding layer, a paving lower layer, an interlayer bonding layer and a paving upper layer, which are laid in sequence from bottom to top. The anti-corrosion layer is an epoxy zinc-rich primer, the waterproof bonding layer is an epoxy resin adhesive, the paving lower layer is epoxy asphalt concrete, the interlayer bonding layer includes epoxy asphalt adhesive, glass fiber grid and gravel, and the paving upper layer is modified asphalt concrete SMA.

[0006] Furthermore, the surface of the epoxy asphalt concrete is roughened, with a construction depth of not less than 0.6 mm.

[0007] Furthermore, the interlayer adhesive layer is 0.8-1.5kg / m 2 Epoxy asphalt adhesive + fiberglass grille + 3-6kg / m 2 Crushed stone + 0.5-1.0kg / m 2 Epoxy asphalt binder composition.

[0008] Furthermore, the dosage of epoxy resin adhesive is 0.35-0.55kg / m 2 .

[0009] Furthermore, the epoxy resin adhesive is composed of an epoxy resin main agent and a curing agent in a mass ratio of 50-90:40-100; the epoxy resin main agent is composed of graphene-modified liquid epoxy resin, diglycidyl ether, and glycidyl methacrylate in a mass ratio of 100:5-25:5-15; the curing agent is composed of a primary amine curing agent, a glycidyl ester-modified amine curing agent, an amino-terminated urethane prepolymer, and a curing accelerator in a mass ratio of 80-110:10-25:10-20:6-20.

[0010] Furthermore, the epoxy asphalt binder is composed of modified asphalt, epoxy resin material, compatibilizer and anti-aging agent, and the mass ratio of the modified asphalt, epoxy resin material, compatibilizer and anti-aging agent is 100:15-60:5-10:0.1-0.5; the crushed stone is 3-5mm basalt with good regularity.

[0011] Furthermore, the epoxy asphalt concrete is a hot mix epoxy asphalt concrete with a Marshall stability of not less than 60 kN; and the modified asphalt concrete SMA is a high elastic asphalt concrete SMA.

[0012] The beneficial effects of the present invention are:

[0013] The utility model roughens the epoxy asphalt concrete of the lower layer of the pavement, which can strengthen the connection between the upper and lower layers of the pavement. When constructing the modified asphalt concrete SMA, the epoxy asphalt binder will melt, and under the action of paving and rolling, the aggregate of the concrete will be embedded in the interlayer bonding layer, and the gravel of the interlayer bonding layer will be embedded in the modified asphalt concrete SMA, combining the upper and lower layers of the pavement into a tight whole, further improving the shear resistance of the pavement structure, and can effectively solve problems such as displacement under high temperatures. On the one hand, the fiberglass grid can disperse the compressive stress and tensile stress of the pavement surface layer, forming a buffer zone between the two stress-bearing areas, reducing the damage to the pavement surface layer caused by stress mutations, and on the other hand, it can also hinder the displacement of the pavement surface layer.

[0014] Other advantages, objectives, and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or they may be taught by those skilled in the art from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:

[0016] Figure 1 This is a structural diagram of a steel bridge deck pavement according to an embodiment of the present utility model;

[0017] The markings in the attached figure are as follows: 1. Steel plate; 2. Anti-corrosion layer; 3. Waterproof bonding layer; 4. Pavement lower layer; 5. Interlayer bonding layer; 6. Pavement upper layer. DETAILED DESCRIPTION

[0018] like Figure 1As shown, the present invention discloses a steel bridge deck pavement structure, which, from bottom to top, comprises a steel plate 1, an anti-corrosion layer 2, a waterproof bonding layer 3, a pavement lower layer 4, an interlayer bonding layer 5, and a pavement upper layer 6. The anti-corrosion layer 2 is an epoxy zinc-rich primer, the waterproof bonding layer 3 is an epoxy resin adhesive, the pavement lower layer 4 is epoxy asphalt concrete, the interlayer bonding layer 5 is epoxy asphalt adhesive + fiberglass grid + crushed stone + epoxy asphalt adhesive, and the pavement upper layer 6 is modified asphalt concrete (SMA).

[0019] Among them, the epoxy resin adhesive is composed of an epoxy resin main agent and a curing agent in a mass ratio of 50-90:40-100; the epoxy resin main agent is composed of graphene-modified liquid epoxy resin, diglycidyl ether, and glycidyl methacrylate in a mass ratio of 100:5-25:5-15; the curing agent is composed of a primary amine curing agent, a glycidyl ester-modified amine curing agent, an amino-terminated urethane prepolymer, and a curing accelerator in a mass ratio of 80-110:10-25:10-20:6-20.

[0020] The epoxy asphalt binder is composed of modified asphalt, epoxy resin material, compatibilizer and anti-aging agent, wherein the mass ratio of the modified asphalt, epoxy resin material, compatibilizer and anti-aging agent is 100:15-60:5-10:0.1-0.5; the crushed stone is 3-5mm basalt with good regularity.

[0021] The epoxy asphalt concrete is hot mix epoxy asphalt concrete with a Marshall stability of not less than 60 kN; the modified asphalt concrete SMA is high elastic asphalt concrete SMA.

[0022] The construction method of this steel bridge deck pavement structure is as follows:

[0023] (1) Sandblasting and rust removal of steel bridge decks. The surface of the steel bridge deck after sandblasting and rust removal should meet the requirements of GB8923-88 standard Sa 2.5, and the roughness requirement must reach Rz 60-140μm;

[0024] (2) Spraying epoxy zinc-rich primer and completing it within 4 hours after sandblasting and rust removal;

[0025] (3) Spray epoxy resin adhesive, dosage 0.35-0.55kg / m 2 ;

[0026] (4) After the epoxy resin adhesive is cured in the first stage and before the effective period of the adhesive, the lower layer of epoxy asphalt concrete is constructed at a construction temperature of 160-180°C;

[0027] (5) After the construction of epoxy asphalt concrete is completed, its surface is roughened by shot blasting or other roughening treatments to improve the roughness;

[0028] (6) After roughening, construct the interlayer bonding layer 5 and apply epoxy asphalt adhesive at a dosage of 0.8-1.5kg / m 2 , lay fiberglass grid, flatten it manually, and then spread gravel, with a spreading amount of 3-6kg / m 2 , continue to apply epoxy asphalt adhesive, dosage 0.5-1.0kg / m 2 ;

[0029] (7) After the interlayer bonding layer 5 is constructed, before the bonding period expires, the top layer of modified asphalt concrete SMA is constructed at a construction temperature of 180-190°C;

[0030] (8) Traffic can be reopened after the health care is completed.

[0031] The utility model has the following beneficial effects:

[0032] Roughening the epoxy asphalt concrete underlay of the pavement strengthens the bond between the upper and lower pavement layers. During the construction of the modified asphalt concrete (SMA), the epoxy asphalt binder melts. Under the action of paving and rolling, the concrete aggregate embeds into the interlayer bonding layer 5. The gravel in the interlayer bonding layer 5 then embeds into the modified asphalt concrete SMA, combining the upper and lower pavement layers into a cohesive whole. This further enhances the pavement structure's shear resistance and effectively addresses problems like slippage at high temperatures. The fiberglass grid disperses the compressive and tensile stresses on the pavement surface, forming a buffer zone between the two stress-bearing areas, reducing damage to the pavement surface caused by sudden stress changes. It also prevents slippage of the pavement surface.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A steel bridge deck pavement structure, characterized by: The invention comprises a steel plate (1), an anti-corrosion layer (2), a waterproof bonding layer (3), a pavement lower layer (4), an interlayer bonding layer (5) and a pavement upper layer (6) which are laid in sequence from bottom to top, wherein the anti-corrosion layer (2) is an epoxy zinc-rich primer, the waterproof bonding layer (3) is an epoxy resin adhesive, the pavement lower layer (4) is epoxy asphalt concrete, the interlayer bonding layer (5) includes epoxy asphalt adhesive, glass fiber grid and gravel, and the pavement upper layer (6) is modified asphalt concrete SMA; the epoxy asphalt concrete surface of the pavement lower layer (4) is roughened, and the structural depth is not less than 0.6 mm.

2. The steel bridge deck pavement structure according to claim 1, characterized in that: The interlayer bonding layer (5) is 0.8-1.5kg / m 2 Epoxy asphalt adhesive + fiberglass grille + 3-6kg / m 2 Crushed stone + 0.5-1.0kg / m 2 Epoxy asphalt binder composition.

3. The steel bridge deck pavement structure according to claim 1, characterized in that: Epoxy resin adhesive dosage 0.35-0.55kg / m 2 .

4. The steel bridge deck pavement structure according to claim 1, characterized in that: The epoxy asphalt concrete is hot mix epoxy asphalt concrete with a Marshall stability of not less than 60 kN; the modified asphalt concrete SMA is high elastic asphalt concrete SMA.

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