Steel bridge deck pavement structure

Abstract

The utility model discloses a kind of steel bridge deck pavement structures, belong to bridge engineering technical field.The structure includes metal plate, first bonding layer, concrete layer, polymer fiber web, second bonding layer, pitch layer, polymer fiber web is laid above concrete layer, and is connected with the storage tank being set in bridge deck one side, light stabilizer aqueous solution is stored in storage tank, polymer fiber web is adsorbed and evenly dispersed to entire pavement layer by capillary action.Light stabilizer is continuously supplemented, the anti-ultraviolet aging performance and service life of pavement material are significantly improved, especially suitable for high ultraviolet radiation area, with good engineering application prospect.

Description

Technical Field

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

[0002] Steel bridge deck pavement structures are a crucial component ensuring the safety and durability of bridge traffic. Due to the high rigidity and poor deformation coordination of steel bridge decks, the pavement materials must possess excellent compressive strength, abrasion resistance, bond strength, crack resistance, and durability. Currently, commonly used pavement materials include epoxy asphalt concrete layers, cast-in-place asphalt concrete layers, asphalt mastic concrete layers, and ultra-high performance concrete layers. However, these materials generally suffer from the following problems in practical engineering applications: high cost, poor low-temperature crack resistance, insufficient high-temperature stability, poor bonding performance with steel plates, or high construction difficulty, all of which affect the long-term performance of steel bridge deck pavement structures.

[0003] In recent years, polyurethane concrete layers have gradually attracted attention due to their excellent mechanical properties and construction adaptability. However, polyurethane material layers are prone to aging and degradation under ultraviolet radiation, manifesting as discoloration, brittleness, and decreased mechanical properties, which seriously affect their service life, especially in high-altitude areas with strong ultraviolet radiation.

[0004] To improve the UV resistance of polyurethane concrete layers, existing technologies typically involve adding light stabilizers to the concrete. While this method can delay the aging process to some extent, it has the following drawbacks: First, light stabilizers are easily depleted under long-term UV exposure, leading to a decline in their anti-aging effect over time; second, the distribution of light stabilizers in the concrete layer is uneven, easily causing localized enrichment or poor dispersion; and third, the addition process is complex, making large-scale application difficult. In addition, existing technologies also involve applying a protective layer containing light stabilizers to the concrete surface, but because the coating is easily worn and peeled off, it cannot form a long-term stable UV protection mechanism.

[0005] In summary, existing steel bridge deck paving structures still suffer from insufficient long-term resistance to ultraviolet aging, difficulty in replenishing light stabilizers, and uneven distribution, making it difficult to meet service life requirements. In particular, the durability issues are especially prominent in high-altitude environments with strong ultraviolet radiation. Utility Model Content

[0006] To address the shortcomings of the existing technology, this utility model provides a steel bridge deck pavement structure that is simple in structure, easy to maintain, and capable of continuous replenishment of light stabilizers.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A steel bridge deck pavement structure is composed of several structural layers, including a metal plate at the bottom layer, a first adhesive layer laid on the metal plate, a concrete layer laid on the first adhesive layer, a polymer fiber mesh laid on the concrete layer, a second adhesive layer laid on the polymer fiber mesh, and an asphalt layer laid on the second adhesive layer.

[0009] The steel bridge deck pavement structure has several storage containers for storing light stabilizer aqueous solution pre-embedded on one side of the steel bridge. The top surface of the storage containers is at the same level as the top surface of the asphalt layer. The ends of the polymer fiber web are formed with water-absorbing parts that extend through the storage containers into their interior.

[0010] Furthermore, the mesh density of the polymer fiber web is 100-400 g / m². 2 between.

[0011] Furthermore, the absorbent element is a polymer fiber web folded into blocks or clumps.

[0012] Furthermore, a hydrophilic coating is provided between the polymer fiber web and the second adhesive layer.

[0013] Furthermore, the storage container is a metal can, and the top of the storage container is provided with a feeding port, which is detachably fitted with a plug.

[0014] Furthermore, the storage container has an opening on its side, through which the end of the polymer fiber web extends into the interior of the storage container.

[0015] Furthermore, a sealing ring is provided at the opening on the side of the storage container.

[0016] The beneficial effects of this utility model are:

[0017] Compared with the prior art, the steel bridge deck pavement structure provided by this utility model has the following significant technical advantages and positive effects:

[0018] 1. Reasonable structure and easy implementation: By pre-embedding a storage tank with a feeding port on the side of the steel bridge and laying a hydrophilic polymer fiber mesh on top of the concrete layer, the light stabilizer can be continuously replenished to the entire pavement structure through capillary adsorption, thus achieving long-term UV protection for materials such as polyurethane concrete.

[0019] 2. Enables long-term replenishment of light stabilizers: Unlike traditional one-time addition or surface coating methods, this invention constructs a delivery channel for the light stabilizer aqueous solution by setting up a combination structure of storage tank and polymer fiber mesh, which can replenish the light stabilizer regularly during use, significantly extending the service life of the paving structure.

[0020] 3. Improve UV resistance: The polymer fiber web has good hydrophilicity and adsorption capacity, which can evenly disperse the light stabilizer aqueous solution throughout the entire paving layer, avoiding local enrichment or uneven distribution, thereby effectively improving the material's UV resistance.

[0021] 4. Enhance the overall mechanical properties of the pavement structure: The polymer fiber mesh has high tensile strength. When laid between the concrete layer and the asphalt layer, it not only acts as an adsorbent for light stabilizers but also as a reinforcement, thereby improving the overall crack resistance and fatigue resistance of the pavement structure.

[0022] 5. High adaptability, suitable for high-altitude areas with strong ultraviolet radiation: It is especially suitable for plateaus, deserts and other areas with strong ultraviolet radiation, solving the problem of rapid aging and short lifespan of traditional materials due to ultraviolet radiation, and meeting the design service life requirement of more than 15 years for bridge engineering.

[0023] 6. Reliable sealing and easy maintenance: The storage tank has an opening with a sealing ring on the side for threading the polymer fiber mesh and preventing liquid leakage; at the same time, the top of the storage tank has a feeding port with a removable plug for easy replenishment of light stabilizer aqueous solution, making maintenance and operation simple.

[0024] 7. Low cost, simple process, and easy to promote and apply on a large scale: This utility model uses conventional materials and mature construction technology, without the need for complicated production equipment or special construction conditions, and is suitable for promotion and application in various steel bridge deck paving projects.

[0025] In summary, this utility model, through optimized structural design, introduces a light stabilizer slow-release mechanism without altering the original pavement system, balancing functionality and practicality. It effectively solves the problems of poor UV aging resistance and insufficient durability of existing steel bridge deck pavement structures, and has good prospects for engineering applications. Attached Figure Description

[0026] Figure 1 This is a sectional view of the steel bridge deck pavement structure of this utility model;

[0027] Figure 2 This is a top view of the steel bridge deck pavement structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the storage tank of this utility model;

[0029] In the diagram, 1—metal plate, 2—concrete layer, 3—first bonding layer, 4—polymer fiber mesh, 5—second bonding layer; 6—asphalt layer, 7—storage container, 8—water absorption component; 71—feeding port, 72—plug, 73—opening. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0031] In view of the problems of insufficient long-term resistance to ultraviolet aging, difficulty in replenishing light stabilizers, and uneven distribution of existing steel bridge deck pavement structures, this embodiment provides a steel bridge deck pavement structure that is simple in structure, easy to maintain, and can achieve continuous replenishment of light stabilizers.

[0032] like Figure 1 and Figure 2 As shown, the steel bridge deck pavement structure consists of multiple layers, including a metal plate 1 at the bottom, and a first bonding layer 3, a concrete layer 2, a polymer fiber mesh 4, a second bonding layer 5, and an asphalt layer 6 laid sequentially on top of the metal plate 1. The first bonding layer 3 is located between the metal plate 1 and the concrete layer 2 to achieve a strong bond between them; the concrete layer 2 is preferably a polyurethane concrete layer, which has good mechanical properties and durability; the metal plate 1 is preferably a steel plate. Furthermore, the polymer fiber mesh 4 is laid on top of the concrete layer 2, possessing good hydrophilicity and the ability to absorb and uniformly disperse the light stabilizer aqueous solution, thereby improving the overall pavement structure's resistance to ultraviolet aging. The second bonding layer 5 is coated on the polymer fiber mesh 4, and the asphalt layer 6 is laid on the surface of the second bonding layer 5.

[0033] The first bonding layer 3 uses the same materials as the bonding layer in the Chinese invention patent application "Road Pavement Structure and Manufacturing Method Thereof" (patent application number CN202210132290.X); the second bonding layer 5 uses HYE adhesive; the asphalt layer 6 uses asphalt horseshoe ester; and the concrete layer 2 can be made of existing polyurethane concrete. The polymer fiber mesh 4 is preferably a polyvinyl alcohol fiber mesh, purchased from Changzhou Tianyi Engineering Fiber Co., Ltd., but other hydrophilic materials such as nanocellulose mesh can also be used. Preferably, the unit area mass of the polymer fiber mesh 4 is controlled within the range of 100–400 g / m², which ensures good adsorption and uniform distribution of the light stabilizer aqueous solution, avoiding the impact of local aggregation on the mechanical properties of the main structure, and also ensures that the fiber mesh itself has sufficient tensile strength, thereby enhancing the crack resistance and fatigue resistance of the overall pavement structure.

[0034] Furthermore, such as Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, multiple storage containers 7 are embedded in one side of the steel bridge to store the light stabilizer aqueous solution. The top surface of the storage container 7 is at the same level as the top surface of the asphalt layer 6 to maintain the overall flatness of the bridge deck. In this embodiment, the storage container 7 is preferably a metal can, which has good durability and sealing performance.

[0035] The storage container 7 has a feeding port 71 at its top, and a plug 72 is detachably installed at the feeding port 71. The feeding port 71 can be opened and closed by inserting and removing the plug 72, facilitating the periodic replenishment of the light stabilizer aqueous solution. The light stabilizer aqueous solution is formed by dispersing a light stabilizer in water, wherein the light stabilizer can be selected from any one or more combinations of ultraviolet absorbers, ultraviolet shielding agents, quenchers, free radical scavengers, and hydroperoxide decomposers. In this embodiment, titanium dioxide is selected as the light stabilizer.

[0036] To achieve effective adsorption and transport of the light stabilizer aqueous solution, the end of the polymer fiber web 4 extends into the storage container 7 from its side and is folded into a block or clump structure inside the container to form an absorbent element 8. This absorbent element 8 can effectively adsorb and store the light stabilizer aqueous solution, preventing the light stabilizer from settling in the liquid. At the same time, it continuously transports the light stabilizer to the entire polymer fiber web 4 through capillary action, achieving long-term UV protection for the paving structure.

[0037] To ensure airtightness, the storage container 7 has an opening 73 on its side for the polymer fiber mesh 4 to pass through. A sealing ring is provided at the opening 73. The polymer fiber mesh 4 passes through the sealing ring and enters the container to prevent liquid leakage. Since no additional water-absorbing components are needed, material costs are saved, while ensuring that the polymer fiber mesh 4 can smoothly absorb the light stabilizer aqueous solution, achieving integrated structure and function.

[0038] The construction methods for the steel bridge deck pavement structure include the following:

[0039] First, the metal plate 1 is surface treated: the metal plate 1 is rusted by shot blasting until its surface cleanliness reaches Sa2.5 level and the roughness is controlled between 60 and 100 micrometers to ensure that the subsequent bonding layer has good adhesion.

[0040] Then, apply the first adhesive and lay the concrete layer 2: apply the first adhesive evenly to the surface of the metal plate 1 at a dosage of 0.15 to 0.3 kg / m², and spread polyurethane concrete or other suitable concrete material on it before it gels to form the concrete layer 2.

[0041] Then, the storage container 7 is installed: the storage container 7 for storing the aqueous solution of the light stabilizer is fixedly installed on one side of the metal plate 1 to provide a liquid supply device for the subsequent adsorption of the light stabilizer by the polymer fiber web 4.

[0042] Next, the polymer fiber mesh 4 is laid: the polymer fiber mesh 4 is pre-soaked in the light stabilizer aqueous solution to fully wet it, preventing the mesh from being blocked during subsequent concrete construction. It is then laid on the surface of the concrete layer 2, and the ends of the fiber mesh 4 are inserted into the storage container 7, appropriately extended and folded into blocks or clumps to form water-absorbing parts 8, so as to continuously absorb and transport the light stabilizer.

[0043] Then, the second adhesive is applied and the asphalt layer 6 is laid: the second adhesive is uniformly applied to the surface of the polymer fiber mesh 4, and the asphalt mixture is laid before it gels to form the asphalt layer 6.

[0044] Finally, the entire structure is cured and formed: after each layer of material has fully cured, the first adhesive forms the first bonding layer 3, the concrete cures to form the concrete layer 2, the second adhesive forms the second bonding layer 5, and the asphalt mixture forms the asphalt layer 6, thus completing the construction of the entire steel bridge deck pavement structure.

[0045] In summary, the steel bridge deck pavement structure provided in this embodiment, by setting a hydrophilic polymer fiber mesh 4 above the concrete layer 2 and pre-embedding a storage container 7 for storing an aqueous solution of light stabilizer on one side of the bridge deck, utilizes the capillary adsorption effect of the polymer fiber mesh 4 to continuously absorb the aqueous solution of light stabilizer from the storage container 7 and uniformly disperse it throughout the entire pavement structure, thereby effectively improving the material's resistance to ultraviolet aging. This structural design overcomes the problem of insufficient long-term effectiveness caused by traditional one-time addition or surface coating of light stabilizers, achieving the replenishment and uniform distribution of light stabilizers, significantly extending the service life of the pavement structure, and is particularly suitable for bridge engineering in harsh environments such as high altitudes and strong ultraviolet radiation. In addition, the polymer fiber mesh 4 not only serves as a carrier for the light stabilizer, but also acts as a reinforcement in the concrete layer 2 due to its good tensile strength, improving the crack resistance and tensile strength of the overall pavement structure, further enhancing the structural durability.

[0046] In addition, to verify the aging resistance of the steel bridge deck pavement structure provided in this embodiment under long-term ultraviolet radiation, an accelerated ultraviolet aging test was conducted on it. This test simulated 15 years of outdoor ultraviolet radiation environment and tested the key mechanical performance indicators after aging.

[0047] The experiment compared the performance changes of specimens with no UV-resistant additive, one mid-term addition, and two intermittent additions over a 15-year lifespan, with each addition occurring approximately every 5 years. Test items included: bond strength to steel plate at 70℃, flexural tensile strength at -10℃, and fatigue performance under alternating temperatures from -10℃ to 70℃.

[0048] The test results are shown in the table below:

[0049]

[0050] The experimental data shows that with the increase in the number of times the UV-resistant additive is added, the retention rate of various mechanical properties is significantly improved. In particular, when added twice, the bond strength and flexural tensile strength reach more than 85% of the original strength before aging, and the fatigue life is also greatly increased to 8 million cycles, demonstrating excellent resistance to UV aging and structural durability.

[0051] Therefore, it can be seen that the steel bridge deck pavement structure provided in this embodiment effectively improves the stability and service life of the pavement structure under long-term ultraviolet radiation by setting up a storage container 7 that can replenish light stabilizer and polymer fiber mesh 4, thus meeting the technical requirement of a design life of more than 15 years for bridge engineering. Example 2

[0052] Based on Example 1, this example further optimizes the surface structure of the polymer fiber web 4 to enhance its adsorption capacity for light stabilizer aqueous solution.

[0053] Specifically, a hydrophilic coating is added between the polymer fiber web 4 and the second adhesive layer 5. This hydrophilic coating can significantly improve the wetting properties of the fiber web surface, thereby enhancing its adsorption and transport efficiency for the light stabilizer aqueous solution. In this embodiment, the hydrophilic coating is preferably a PEG-modified silane coating, which has good hydrophilicity and chemical stability. The material was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0054] The overall structure of the paving structure in this embodiment is the same as that in Embodiment 1, except that a surface treatment step for the polymer fiber mesh 4 is added in the construction process. During construction, a hydrophilic coating is first applied to the surface of the polymer fiber mesh 4. After the coating dries, the fiber mesh is immersed in a light stabilizer aqueous solution for thorough wetting. Then, it is laid on the surface of the concrete layer 2, and its ends are inserted into the storage container 7 to form water-absorbing parts 8.

[0055] Through the above improvements, this embodiment maintains the original structural functionality while further enhancing the adsorption efficiency and distribution uniformity of the light stabilizer, thereby strengthening the anti-ultraviolet aging ability and long-term durability of the steel bridge deck pavement structure.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steel bridge deck pavement structure characterized by: The steel bridge deck pavement structure consists of several structural layers, including a metal plate at the bottom, a first bonding layer laid on the metal plate, a concrete layer laid on the first bonding layer, a polymer fiber mesh laid on the concrete layer, a second bonding layer laid on the polymer fiber mesh, and an asphalt layer laid on the second bonding layer. The steel bridge deck pavement structure has a storage container for storing an aqueous solution of light stabilizer pre-embedded on one side of the steel bridge. The top surface of the storage container is at the same level as the top surface of the asphalt layer. The ends of the polymer fiber web extend from the side of the storage container through the storage container into its interior.

2. The steel bridge deck pavement structure according to claim 1, characterized in that: The mesh density of the polymer fiber web is between 100-400 g / m2.

3. The steel bridge deck pavement structure according to claim 1, characterized in that: The ends of the polymer fiber web are formed with absorbent elements that extend through the storage container into its interior; the absorbent elements are polymer fiber webs folded into blocks or clumps.

4. The steel bridge deck pavement structure of claim 1, wherein: A hydrophilic coating is also provided between the polymer fiber web and the second adhesive layer.

5. The steel bridge deck pavement structure according to claim 1, characterized in that: The storage container is a metal can, and the top of the storage container is provided with a feeding port, which is detachably fitted with a plug.

6. The steel bridge deck pavement structure according to claim 3, characterized in that: The storage container has an opening on its side, through which the end of the polymer fiber web extends into the interior of the storage container.

7. The steel bridge deck pavement structure according to claim 6, characterized in that: A sealing ring is provided at the opening on the side of the storage container.

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