Novel large-span steel bridge deck pavement structure

Abstract

The novel large-span steel bridge deck pavement structure comprises a steel bridge deck slab, an anti-corrosion layer, a bonding layer, a waterproof layer, a drainage layer, a protection layer and a wearing layer are sequentially laid on the steel bridge deck slab from bottom to top, the bonding layer is a hot melting type epoxy resin bonding layer, a drainage groove is formed in the top of the drainage layer, and the protection layer is arranged in the drainage groove. The protective layer is made of cast asphalt concrete, the wearing layer is made of high-performance asphalt concrete, premixed asphalt macadam is embedded in the protective layer, and modified emulsified asphalt tack coat oil is spread between the protective layer and the wearing layer. The utility model provides a novel large-span steel bridge deck pavement structure which is provided with an anti-corrosion layer, a hot-melt epoxy resin bonding layer, a waterproof layer, a drainage layer, a protection layer and a wearing layer, provides an effective protection system for a steel bridge deck, and provides a durable bridge deck with good driving performance for a bridge.

Description

Technical Field

[0001] The utility model is applicable to the technical field of steel bridge deck paving for road engineering, and specifically relates to a novel large-span steel bridge deck paving structure. Background Art

[0002] In recent years, with the rapid growth of my country's comprehensive strength, the construction of long-span steel bridges has developed rapidly, and the steel bridge deck pavement system is an important part of the bridge driving system, and its quality directly affects the safety, comfort, bridge durability, investment benefits and social benefits of driving. The bridge deck pavement directly laid on the orthotropic steel plate is more complicated in stress and deformation than the traditional road surface under the influence of factors such as driving load, temperature change and local deformation of the steel bridge deck. The technical requirements for the paving materials, such as strength, temperature stability, deformation tracking ability, water tightness, fatigue durability, etc., are very high.

[0003] However, the existing large-span steel bridge decks have low stiffness and large deformation. Asphalt pavement layers are used, and the asphalt pavement layers are subject to complex forces and are greatly affected by temperature. Especially under the action of horizontal shear stress, the pavement layer is prone to various deformations and damages. Therefore, the deck paving of large-span steel bridges has always been an international problem. Utility Model Content

[0004] In view of the above-mentioned problems existing in the current large-span steel bridge deck pavement structure, the utility model provides a new type of large-span steel bridge deck pavement structure, which is provided with an anti-corrosion layer, a hot-melt epoxy resin bonding layer, a waterproof layer, a drainage layer, a protective layer and a wear layer to provide an effective protection system for the steel bridge deck, and the high-performance asphalt concrete provides the bridge with a good driving performance and a durable bridge deck.

[0005] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0006] A novel large-span steel bridge deck pavement structure comprises a steel bridge deck, on which an anti-corrosion layer, a bonding layer, a waterproof layer, a drainage layer, a protective layer and a wear layer are laid in sequence from bottom to top, wherein the bonding layer is a hot-melt epoxy resin bonding layer, a drainage groove is provided on the top of the drainage layer, the protective layer is cast asphalt concrete, the wear layer is high-performance asphalt concrete, premixed asphalt macadam is embedded in the protective layer, and modified emulsified asphalt tack coat oil is spread between the protective layer and the wear layer.

[0007] According to one aspect of the utility model, a polyurethane heat shielding coating is provided on the wear layer.

[0008] According to one aspect of the utility model, the drainage groove is a trapezoidal groove.

[0009] According to one aspect of the utility model, the void ratio of the poured asphalt concrete is less than 1%.

[0010] According to one aspect of the utility model, the crushed stone particle size of the premixed asphalt crushed stone is 5mm-10mm.

[0011] According to one aspect of the utility model, the crushed stone particle size of the premixed asphalt crushed stone is 10mm-15mm.

[0012] According to one aspect of the utility model, the thickness of the bonding layer is 1-3 mm.

[0013] According to one aspect of the utility model, the thickness of the wear layer is 3-6 cm, and the thickness of the protective layer is 2.5-4 cm.

[0014] According to one aspect of the utility model, the anti-corrosion layer has a thickness of 0.05-0.1 mm.

[0015] According to one aspect of the utility model, the steel bridge deck is a steel plate with a thickness of 10-20 mm.

[0016] Advantages of the implementation of the utility model: A new type of large-span steel bridge deck pavement structure, the anti-corrosion layer has strong anti-corrosion performance and adhesion to the base surface of the steel bridge deck, and the hot-melt epoxy resin bonding layer is used to improve the overall performance of the bonding layer. The combination of the waterproof layer and the drainage layer can reduce the risk of bridge deck damage caused by water erosion. The poured asphalt concrete is used as a protective layer to provide an effective protection system for the steel bridge deck to prevent water penetration, which can better solve the rust prevention, bonding and waterproofing problems of the steel bridge, improve the durability of use, and have high economic and social benefits. The high-performance asphalt concrete mixture has excellent high-temperature rutting resistance, low-temperature cracking resistance, fatigue resistance and other properties, providing the bridge with a good driving performance and durable bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The utility model is a structural schematic diagram of a novel large-span steel bridge deck pavement structure.

[0019] Figure 1 Among them, 1. Steel bridge deck; 2. Anti-corrosion layer; 3. Adhesive layer; 4. Waterproof layer; 5. Drainage layer; 6. Protective layer; 7. Wear layer; 8. Drainage groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 As shown, a novel large-span steel bridge deck pavement structure comprises a steel bridge deck 1, on which an anti-corrosion layer 2, a bonding layer 3, a waterproof layer 4, a drainage layer 5, a protective layer 6 and a wear layer 7 are laid in sequence from bottom to top, the bonding layer 3 is a hot-melt epoxy resin bonding layer, a drainage groove 8 is provided on the top of the drainage layer 5, the protective layer 6 is cast asphalt concrete, the wear layer 7 is high-performance asphalt concrete, premixed asphalt macadam is embedded in the protective layer 6, and modified emulsified asphalt tack coat oil is spread between the protective layer 6 and the wear layer 7.

[0022] In practical applications, the anti-corrosion layer 2 has strong anti-corrosion performance and adhesion to the base surface of the steel bridge deck 1. The effective ingredients in the anti-corrosion layer 2 can penetrate into the sandblasting pits of the steel bridge deck 1, making the coating more dense and having good anti-corrosion durability. The hot-melt epoxy resin bonding layer has good compatibility, does not delaminate after being mixed evenly, has high bonding strength, improves the durability of the mixture and the pavement structure, and has good protective performance for the steel bridge deck 1. The combination of the waterproof layer 4 and the drainage layer 5 can reduce the risk of damage to the bridge deck caused by water erosion. The poured asphalt concrete serves as a protective layer 6, providing an effective protection system for the steel bridge deck 1, further preventing the penetration of water, and can better solve the rust prevention, bonding and waterproofing problems of the steel bridge, improve the durability of use, and have high economic and social benefits. The high-performance asphalt concrete mixture has excellent high-temperature rutting resistance, low-temperature cracking resistance, fatigue resistance and other properties, providing the bridge with a good driving performance and durable bridge deck.

[0023] In practical applications, a polyurethane heat shielding coating may be provided on the wear layer 7, thereby effectively reducing the influence of heat radiation on the bridge deck, lowering the bridge deck temperature, thereby improving the use conditions of the bridge deck in a high temperature environment and improving driving safety.

[0024] In practical applications, the drainage groove 8 can be set as a trapezoidal groove, which has a better water collection effect. Further, the drainage grooves 8 are evenly and equidistantly distributed, and the number is set to be multiple, so that the drainage performance is better.

[0025] In practical applications, the poured asphalt concrete has good waterproof performance, anti-aging performance, anti-fatigue performance and excellent conformability to steel panels. Specifically, in order to have a better waterproof effect, the void ratio of the poured asphalt concrete is less than 1%.

[0026] In practical applications, the high-performance asphalt concrete type can be selected from AC, SMA or OGFC. Specifically, AC refers to a dense-graded asphalt concrete mixture, which is a dense suspended structure. SMA refers to a mastic asphalt crushed stone mixture, which is a skeleton dense structure. OGFC refers to an open-graded drainage wear layer 7 mixture, which is a skeleton void structure. The high-performance asphalt concrete has excellent high-temperature rutting resistance, low-temperature cracking resistance, fatigue resistance and other properties, and can provide a bridge with good driving performance and durable bridge deck.

[0027] In practical applications, the crushed stone particle size of the premixed asphalt crushed stone can be selected to be 5mm-10mm or 10mm-15mm, and the coverage rate is 50%-90%. By spreading the premixed asphalt crushed stone on the surface of the poured asphalt concrete, its high temperature stability and interface shear resistance can be improved.

[0028] In practical applications, the hot-melt epoxy resin bonding layer is made of epoxy resin A and curing agent B mixed in the ratio of A:B=100:100. In order to ensure the use effect, the thickness of the bonding layer 3 is 1-3mm. Preferably, the optimal thickness is 3mm. The poured asphalt concrete serves as the protective layer 6, and forms a dense bridge deck waterproof system with the drainage layer 5 and the waterproof layer 4, providing an effective protection system for the steel bridge deck 1 to prevent water penetration, which can better solve the rust prevention, bonding and waterproofing problems of the steel bridge and improve the durability of use.

[0029] In practical applications, the anticorrosive coating used in the anticorrosive layer 2 is a conventional commercially available epoxy zinc-rich paint, and the coating thickness of the anticorrosive layer 2 can be selected to be 0.01-0.1 mm. The anticorrosive layer 2 can protect the steel bridge deck 1 and prevent the steel bridge deck 1 from rusting due to contact with moisture in the air.

[0030] In practical applications, the thickness of the wear layer 7 is 3-6 cm, which can further improve the high temperature rutting resistance and weather resistance of the high performance asphalt concrete. The thickness of the protective layer 6 can be 2.5-4 cm, which can increase the waterproof ability of the bridge deck pavement structure and reduce high temperature damage.

[0031] In practical applications, the steel bridge deck 1 is subjected to shot blasting and rust removal. The rust removal grade of the steel bridge deck 1 is Sa2.5, and the roughness is 50-100 μm. The steel bridge deck 1 can be selected from a steel plate with a thickness of 10-20 mm, so that the steel bridge deck 1 has a stronger load-bearing capacity and can better carry loads.

[0032] The novel large-span steel bridge deck pavement structure construction method is as follows: during the construction process, the steel bridge deck 1 is first subjected to shot blasting and rust removal, that is, compressed air is used to spray sand of a certain particle size on the surface of the steel bridge deck 1 through a sandblasting gun to quickly remove rust so that it meets the requirements of cleanliness and roughness, specifically, the rust removal grade is Sa2.5, and the roughness is 50-100μm; then the anti-corrosion layer 2 is applied on the steel bridge deck 1 after shot blasting and rust removal, which can protect the steel bridge deck 1 and prevent oxidation and rust. After the anti-corrosion layer 2 is completely air-dried, the bonding layer 3 is applied. Before the construction of the hot-melt epoxy resin bonding layer, the epoxy resin A and the curing agent B need to be mixed according to A:B=100:100, stirred by an electric mixer for 1-2 minutes, and then the construction can be carried out by manual scraping. Then, a waterproof layer 4 is laid on the bonding layer 3 to ensure that the bridge deck is not eroded by water. Subsequently, a drainage layer 5 is set on the waterproof layer 4, and a groove is opened on the top of the drainage layer 5. On top of the drainage layer 5, a protective layer 6 made of poured asphalt concrete is laid. A certain specification of premixed asphalt crushed stone is spread on the surface of the poured asphalt concrete to improve its high temperature stability and interface shear resistance, and then a layer of modified emulsified asphalt tack coat oil is spread and a wear layer 7 made of high-performance asphalt concrete is laid. By laying the anti-corrosion layer 2, bonding layer 3, waterproof layer 4, drainage layer 5, wear layer 7 and protective layer 6 on the steel bridge pavement, the structure is reasonable, the performance is excellent, and the moisture can be completely isolated, forming an integrated functional layer that is waterproof, anti-seepage, deformation-following, crack-resistant and durable, ensuring the waterproof effect of the steel bridge pavement, extending the service life of the steel bridge deck pavement structure, and reducing maintenance costs.

[0033] Advantages of the implementation of the utility model: A new type of large-span steel bridge deck pavement structure, the anti-corrosion layer has strong anti-corrosion performance and adhesion to the base surface of the steel bridge deck, and the hot-melt epoxy resin bonding layer is used to improve the overall performance of the bonding layer. The combination of the waterproof layer and the drainage layer can reduce the risk of bridge deck damage caused by water erosion. The poured asphalt concrete is used as a protective layer to provide an effective protection system for the steel bridge deck to prevent water penetration, which can better solve the rust prevention, bonding and waterproofing problems of the steel bridge, improve the durability of use, and have high economic and social benefits. The high-performance asphalt concrete mixture has excellent high-temperature rutting resistance, low-temperature cracking resistance, fatigue resistance and other properties, providing the bridge with a good driving performance and durable bridge deck.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A new type of long-span steel bridge deck pavement structure, including a steel bridge deck, characterized in that: An anti-corrosion layer, an adhesive layer, a waterproof layer, a drainage layer, a protective layer and a wear layer are laid on the steel bridge deck from bottom to top in sequence. The adhesive layer is a hot-melt epoxy resin adhesive layer. A drainage groove is opened on the top of the drainage layer. The protective layer is poured asphalt concrete. The wear layer is high-performance asphalt concrete. Premixed asphalt macadam is embedded in the protective layer. Modified emulsified asphalt tack coat oil is spread between the protective layer and the wear layer.

2. A new type of long-span steel bridge deck pavement structure according to claim 1, characterized in that: A polyurethane heat shielding coating is arranged on the wear layer.

3. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The drainage groove is a trapezoidal groove.

4. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The void ratio of the poured asphalt concrete is less than 1%.

5. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The particle size of the premixed asphalt macadam is 5mm-10mm.

6. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The crushed stone particle size of the premixed asphalt crushed stone is 10mm-15mm.

7. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The thickness of the bonding layer is 1-3 m.

8. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The thickness of the wear layer is 3-6 cm, and the thickness of the protective layer is 2.5-4 cm.

9. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The thickness of the anti-corrosion layer is 0.05-0.1 mm.

10. The novel long-span steel bridge deck pavement structure according to claim 1 is characterized in that: The steel bridge deck is a steel plate with a thickness of 10-20 mm.

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