Steel bridge deck pavement structure

Abstract

The utility model relates to the technical field of steel bridge deck construction, specifically, relate to a kind of steel bridge deck pavement structure, set on steel bridge deck, including concrete layer, surface layer and adhesive layer, concrete layer is laid above steel bridge deck, surface layer is laid above concrete layer, adhesive layer is set between concrete layer and surface layer, concrete layer and surface layer are pasted together, surface layer and concrete jointly as the whole of steel bridge, and play the supporting role to the whole steel bridge. Among them, the concrete layer is ultra-high performance concrete layer, the surface layer is polyurethane asphalt mixture layer, with good high-temperature stability, and the crack resistance at low temperature is excellent, the adhesive layer pastes polyurethane asphalt mixture layer and ultra-high performance concrete layer together, further ensure the supporting strength of steel bridge deck using polyurethane asphalt mixture layer and ultra-high performance concrete layer as main body, avoid the collapse of steel bridge deck under the influence of environmental conditions and vehicle overload.

Description

Technical Field

[0001] This utility model relates to the field of steel bridge deck construction technology, specifically to a steel bridge deck paving structure. Background Technology

[0002] With my country's rapid economic growth and technological progress, the demand for cross-river and cross-sea transportation is increasing, leading to the rapid development of the construction of long-span highway steel bridges. Steel bridges are gradually occupying an important position in modern transportation infrastructure.

[0003] However, due to the unique structure and load-bearing characteristics of steel bridge decks, the load on the bridge deck varies depending on environmental factors and vehicle traffic in different areas. The asphalt and concrete layers on the bridge deck deform or fail to bond under the influence of environmental conditions and vehicle loads, resulting in unevenness and requiring additional repairs. Furthermore, the insufficient waterproofing and impermeability of the paving materials used in steel bridge decks make the steel bridge panels susceptible to corrosion from humid environments, affecting the overall service life of the steel bridge. Utility Model Content

[0004] This utility model was developed to solve the aforementioned technical problems. Its purpose is to provide a steel bridge deck pavement structure that combines an ultra-high performance concrete layer and a polyurethane asphalt mixture layer as the main body of the steel bridge deck. This improves the support strength of the entire steel bridge deck pavement structure and prevents the steel bridge deck from deforming under the influence of the external environment and vehicle loads, thus affecting the appearance and integrity of the entire steel bridge deck.

[0005] To achieve the above objectives, this utility model provides a steel bridge deck pavement structure, which is installed on a steel bridge deck. The steel bridge deck pavement structure includes: a concrete layer laid on top of the steel bridge deck; a surface layer laid on top of the concrete layer; and an adhesive layer disposed between the concrete layer and the surface layer. The concrete layer is an ultra-high performance concrete layer, the surface layer is a polyurethane asphalt mixture layer, and the adhesive layer bonds the polyurethane asphalt mixture layer and the ultra-high performance concrete layer together.

[0006] Preferably, the steel bridge deck pavement structure further includes a shear connector, which is disposed between the steel bridge deck and the concrete layer, with one end fixedly connected to the steel bridge deck.

[0007] Preferably, the concrete layer is provided with a steel mesh connected to the shear-resistant connector, and the steel mesh includes multiple intersecting steel bars.

[0008] Preferably, the multiple intersecting reinforcing bars are perpendicular to each other.

[0009] Preferably, the shear-resistant connector is a stud.

[0010] Preferably, the steel bridge deck pavement structure further includes a base layer disposed between the steel bridge deck and the concrete layer, comprising an anti-rust layer and a waterproof adhesive layer, wherein the waterproof adhesive layer is connected to the concrete layer.

[0011] Preferably, the thickness between the top of the surface layer and the bottom of the base layer is in the range of 60-100 mm.

[0012] Preferably, the thickness of the concrete layer is in the range of 40-60 mm.

[0013] Preferably, the thickness of the surface layer is in the range of 20-40 mm.

[0014] Preferably, the adhesive layer is an epoxy interface agent layer.

[0015] Based on the above description and practical experience, the steel bridge deck pavement structure of this utility model is installed on the steel bridge deck. The pavement structure includes a concrete layer, a surface layer, and an adhesive layer. The concrete layer is laid on top of the steel bridge deck, and the surface layer is laid on top of the concrete layer. The adhesive layer is placed between the concrete layer and the surface layer, bonding them together to form a unified whole for the steel bridge deck and providing support. The concrete layer is ultra-high performance concrete, with higher modulus and strength, and better toughness. The surface layer is a polyurethane asphalt mixture layer, which combines the elasticity of polyurethane and the viscosity of asphalt, exhibiting good high-temperature stability and excellent crack resistance at low temperatures. The adhesive layer bonds the polyurethane asphalt mixture layer and the ultra-high performance concrete layer together, further ensuring the supporting strength of the steel bridge deck, which uses the polyurethane asphalt mixture layer and ultra-high performance concrete layer as its main components, and preventing the steel bridge deck from collapsing under environmental conditions and heavy vehicle loads. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the steel bridge deck pavement structure involved in one embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the steel mesh structure of the steel bridge deck pavement structure in one embodiment of the present invention.

[0018] Figure 3 This is a partially enlarged structural diagram of the steel bridge deck paving structure involved in one embodiment of the present utility model.

[0019] The attached figures are labeled as follows: 1. Steel bridge deck; 2. Concrete layer; 3. Surface layer; 4. Adhesive layer; 5. Steel mesh; 6. Rust prevention layer; 7. Waterproof adhesive layer; 8. Shear connectors; 9. Reinforcing bars. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] Furthermore, the accompanying drawings are merely illustrative diagrams of this utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this utility model disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] This utility model discloses a steel bridge deck pavement structure, which is installed on the steel bridge deck 1. Please refer to [reference needed]. Figures 1 to 3The steel bridge deck pavement structure includes a concrete layer 2, a surface layer 3, and an adhesive layer 4. Concrete layer 2 is laid on the steel bridge deck 1, and surface layer 3 is laid on top of concrete layer 2. Adhesive layer 4 is placed between concrete layer 1 and surface layer 3, bonding them together. The steel bridge deck 3 and the concrete together form the whole of the steel bridge, providing support for the entire structure. Concrete layer 2 is an ultra-high performance concrete (UHPC) layer, which has higher modulus and strength, and better toughness. Surface layer 3 is a polyurethane asphalt mixture layer, combining the elasticity of polyurethane and the viscosity of asphalt, exhibiting good high-temperature stability and good crack resistance at low temperatures. Adhesive layer 4 bonds the polyurethane asphalt mixture layer and the ultra-high performance concrete layer together, further ensuring the supporting strength of the steel bridge deck, which uses polyurethane asphalt mixture and ultra-high performance concrete as its main components, preventing the bridge deck from collapsing under environmental conditions and heavy vehicle loads.

[0024] To secure the steel bridge deck 1 and the concrete layer 2 into a stable whole, ensuring that the forces acting on the steel bridge deck can be shared by both the steel bridge deck 1 and the concrete layer 2, in some embodiments, the steel bridge deck pavement structure further includes a shear connector 8. The shear connector 8 is disposed between the steel bridge deck 1 and the concrete layer 2, with one end fixedly connected to the steel bridge deck 1. This further ensures that the steel bridge deck 1 and the concrete layer 2 form a unified structure, greatly increasing the stiffness and load-bearing capacity of the steel bridge deck. The shear connector 8 can be used to resist horizontal shear forces and vertical uplift forces at the interface between the steel bridge deck 1 and the concrete layer 2, preventing relative slippage or separation between the steel bridge deck 1 and the concrete layer 2.

[0025] Understandably, when pouring concrete layer 2, it is necessary to pay close attention to and control the pouring speed and thickness to ensure that concrete layer 2 is evenly distributed on the steel bridge deck. Furthermore, it is necessary to use vibratory compaction equipment in conjunction with concrete layer 2 to remove air bubbles and improve its density. And when concrete layer 2 is ultra-high performance concrete, high-precision mixing equipment and pumping systems are required for the preparation and pouring of the high-performance concrete.

[0026] To enhance the overall structural strength of the steel bridge deck and prevent it from collapsing due to external environmental factors and vehicle loads, in some embodiments, a reinforcing mesh 5 connected to shear connectors 8 is provided within the concrete layer 2. This mesh serves two purposes: firstly, it supports the concrete layer 2 and enhances the tensile strength of the entire steel bridge; secondly, the reinforcing mesh 5 helps to disperse and transfer concentrated stress, preventing localized crushing or cracking of the concrete layer 2 under heavy vehicle loads. The reinforcing mesh 5 comprises multiple intersecting reinforcing bars 9. The connection points between these intersecting bars 9 within the concrete layer 2 can disperse the forces generated by passing vehicles, thereby improving the overall structural strength of the steel bridge deck and preventing damage to the bridge deck from heavy vehicle loads.

[0027] Furthermore, to ensure the stability of the reinforcing mesh 5 in terms of horizontal support and tensile strength of the bridge deck, in some embodiments, multiple intersecting reinforcing bars 9 are perpendicular to each other. This allows the orthogonally meshed reinforcing bars 9 to generate tensile stress on the vehicles when they pass over the bridge deck. The tensile stress is generated in two directions: the tensile stress along the vehicle's travel direction is mainly borne by the longitudinal reinforcing bars 9, while the tensile stress perpendicular to the travel direction is mainly borne by the transverse reinforcing bars 9. By utilizing the reinforcing mesh 5 to jointly resist the bending moments generated in both directions of the bridge deck, the tensile strength of the reinforcing bars 9 is utilized more directly and effectively to resist the forces acting on the bridge deck, further enhancing the stiffness of the concrete layer 2.

[0028] In some embodiments, the shear connector 8 is a stud, which fixes the bridge deck steel plate 1 to the reinforcing mesh 5. It can withstand millions of fatigue load impacts without failure, ensuring the long-term safety and durability of the steel bridge. Furthermore, the stud should be relatively short so that its length does not affect the outer surface layer 3 when connecting the bridge deck steel plate 1 and the reinforcing mesh 5. This maintains the overall aesthetic appearance of the steel bridge deck while preventing direct impact from vehicles, thus ensuring the overall rigidity of the bridge deck steel plate 1 and the concrete layer 2.

[0029] To ensure the overall durability and safety of the steel bridge, in some embodiments, the bridge deck pavement structure also includes a base layer, set between the steel bridge deck 1 and the concrete layer 2. The base layer includes a rust-proof layer 6 and a waterproof adhesive layer 7, with the waterproof adhesive layer 7 connected to the concrete layer 2. The rust-proof layer 6 requires prior cleaning, sandblasting, or rust removal of the steel bridge deck 1 to remove rust, oil, dust, salt, etc., from its surface. After rust removal / sandblasting, an anti-corrosion primer is sprayed onto the steel bridge deck 1 to form a dense and continuous coating on its surface, preventing direct contact with corrosive media such as moisture and ions, thus achieving rust prevention. Furthermore, during cleaning, the surface of the steel bridge deck 1 must achieve a certain roughness to increase the bonding area of ​​the waterproof adhesive layer 7. The waterproof adhesive layer 7 forms a continuous and seamless film on top of the anti-rust layer 6. On the one hand, it can provide a more durable adhesive force for the steel bridge deck 1 and achieve a stable connection with the concrete layer 2. On the other hand, it can ensure that the vehicle load on the concrete layer 2 can be stably transferred to the steel bridge deck 1, ensuring that the steel bridge deck 1 and the concrete layer 2 can form a cohesive whole, further increasing the service life of the steel bridge as a whole.

[0030] Furthermore, to stably fix the concrete layer 2 and the surface layer 3 together, in some embodiments, the adhesive layer 4 is an epoxy interface agent layer, which can stably bond the ultra-high performance concrete layer 2 and the polyurethane asphalt mixture layer together, thereby improving the bond strength and shear strength between the concrete layer 2 and the surface layer 3. This ensures the supporting strength of the steel bridge deck, which uses the polyurethane asphalt mixture layer and the ultra-high performance concrete layer as the main body, and prevents the internal layers of the steel bridge deck from splitting and collapsing under environmental conditions and heavy vehicle loads.

[0031] Furthermore, the steel bridge deck, constructed primarily of polyurethane asphalt mixture and ultra-high performance concrete, and connected with an epoxy interface agent layer, has relatively relaxed requirements for the construction environment. This reduces the construction difficulty and cost while ensuring the quality of the steel bridge deck paving. After the ultra-high performance concrete layer reaches a certain strength, an epoxy interface agent is applied as an adhesive layer before the polyurethane asphalt mixture layer is laid on top. During the paving of the polyurethane asphalt mixture layer, the temperature of the mixture must be maintained, and the paving speed and thickness must be controlled in real time to ensure the paving quality. After paving, the polyurethane asphalt mixture layer is repeatedly compacted using a road roller until it reaches the specified compaction and density. Meanwhile, during the compaction process, attention must be paid to the speed of the roller and the number of compaction cycles on the polyurethane asphalt mixture layer. Excessive roller speed or too many compaction cycles may damage the polyurethane asphalt mixture layer, thereby harming the ultra-high performance concrete layer beneath it and affecting the overall construction progress of the steel bridge deck.

[0032] Understandably, to ensure the supporting effect of the concrete layer 2 within the steel bridge deck, in some embodiments, the thickness of the concrete layer 2 ranges from 40-60mm. Specifically, the thickness of the concrete layer 2 can be 40mm, 45mm, 50mm, 55mm, 60mm, etc. The concrete layer 2 directly bears and distributes the vehicle load, providing a safe driving surface for vehicles. By setting a thicker concrete layer 2, the self-weight of the concrete layer 2 can be increased, suppressing vibrations from vehicle travel and balancing the bending moments generated during vehicle travel, thereby reducing the noise and temperature sensitivity of the steel bridge deck.

[0033] To ensure the integrity and aesthetics of the steel bridge deck, in some embodiments, the thickness of the surface layer 3 ranges from 20-40mm. Specifically, the thickness of the surface layer 3 can be 20mm, 25mm, 30mm, 35mm, 40mm, etc. By setting a surface layer 3 of a certain thickness and using a polyurethane asphalt mixture layer as the surface layer 3, the forces generated by vehicle traffic can be effectively resisted, and the surface layer 3 can protect the concrete layer 2 from the direct impact of vehicle loads. In addition, the polyurethane asphalt mixture layer has strong anti-aging properties, which can improve the service life of the entire steel bridge deck to a certain extent.

[0034] Furthermore, to minimize the self-weight of the steel bridge deck while ensuring its overall protective effect, in some embodiments, the thickness between the top of the surface layer 3 and the bottom of the base layer ranges from 60-100mm, specifically 60mm, 70mm, 80mm, 90mm, 100mm, etc. By incorporating a high-performance concrete layer and a polyurethane asphalt mixture layer, the compressive strength, durability, and waterproofing of the entire steel bridge deck are enhanced, preventing cracking under environmental conditions and external vehicle loads, which could lead to unstable vehicle movement. Simultaneously, this achieves lightweighting of the entire steel bridge deck, preventing excessive force on the supporting columns due to the overall weight of the steel bridge, thus avoiding impacts on the bridge's service life.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A steel bridge deck pavement structure, installed on a steel bridge deck, characterized in that, include: A concrete layer is laid on top of the steel bridge deck; The surface layer is laid on top of the concrete layer; An adhesive layer is disposed between the concrete layer and the surface layer; The concrete layer is an ultra-high performance concrete layer, the surface layer is a polyurethane asphalt mixture layer, and the adhesive layer bonds the polyurethane asphalt mixture layer and the ultra-high performance concrete layer together.

2. The steel bridge deck pavement structure as described in claim 1, characterized in that, Also includes: A shear connector is disposed between the steel bridge deck and the concrete layer, with one end fixedly connected to the steel bridge deck.

3. The steel bridge deck pavement structure as described in claim 2, characterized in that, The concrete layer contains a steel mesh connected to the shear-resistant connector, and the steel mesh includes multiple intersecting steel bars.

4. The steel bridge deck pavement structure as described in claim 3, characterized in that, The multiple intersecting reinforcing bars are perpendicular to each other.

5. The steel bridge deck pavement structure as described in claim 2, characterized in that, The shear-resistant connector is a stud.

6. The steel bridge deck pavement structure as described in claim 1, characterized in that, Also includes: The base layer includes a rust-proof layer and a waterproof adhesive layer, wherein the waterproof adhesive layer is bonded to the concrete layer.

7. The steel bridge deck pavement structure as described in claim 6, characterized in that, The thickness between the top of the surface layer and the bottom of the base layer ranges from 60 to 100 mm.

8. The steel bridge deck pavement structure as described in claim 1, characterized in that, The thickness of the concrete layer ranges from 40 to 60 mm.

9. The steel bridge deck pavement structure as described in claim 1, characterized in that, The thickness of the surface layer ranges from 20 to 40 mm.

10. The steel bridge deck pavement structure as described in claim 1, characterized in that, The adhesive layer is an epoxy interface agent layer.

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