Steel fiber reinforced concrete bridge deck pavement structure

Abstract

The utility model discloses a steel fiber reinforced concrete bridge deck pavement structure, which belongs to the technical field of road engineering, and comprises a base layer, a cushion layer and a surface layer, the cushion layer comprises a reinforced concrete layer, a steel fiber reinforced concrete layer and a first glass fiber cloth layer, the first glass fiber cloth layer is laid between the reinforced concrete layer and the steel fiber concrete layer, and the reinforced concrete layer is provided with a connecting piece. Water molecules are prevented from entering the cushion layer through the first damp-proof layer and the second damp-proof layer, prestress changes caused by temperature changes in the structure are reduced through the expansion joints, and the influence on the internal temperature when the temperature changes are large is prevented through the heat insulation layer. Certain pre-stress pressure is established for the steel fiber reinforced concrete layer through tensioning of the pre-stressed cable so as to improve the rigidity of the steel fiber reinforced concrete layer, and the microcrack resistance of the whole structure is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, specifically to a steel fiber reinforced concrete bridge deck pavement structure. Background Technology

[0002] Steel fiber reinforced concrete (SFR) has become a widely used structure in municipal road engineering in recent years. It is a novel multiphase composite material formed by incorporating randomly distributed short steel fibers into ordinary concrete. These randomly distributed steel fibers effectively inhibit the propagation of micro-cracks and the formation of macro-cracks within the concrete, significantly improving its tensile, flexural, impact, and fatigue resistance, and exhibiting good ductility. SFR is commonly used in municipal road engineering for bridges, indoor and outdoor flooring, and driveways. After laying SFR, a surface layer is sometimes laid on the concrete pavement to provide a certain degree of protection and extend the service life of the concrete.

[0003] Steel fiber reinforced concrete (SFR) is widely used in bridge deck paving and underpass engineering. After bridge deck paving, the concrete surface is exposed to significant environmental changes, such as temperature fluctuations causing expansion and contraction. Ordinary concrete is prone to micro-cracks due to this expansion and contraction, which can eventually damage the concrete pavement. SFR-reinforced concrete, however, offers greater resistance to micro-cracks compared to ordinary concrete. However, besides temperature, humidity also significantly impacts the lifespan of bridge deck concrete structures. Even with SFR-reinforced concrete, water seepage can affect its strength and durability, reducing its resistance to micro-cracks when shrinking due to temperature changes. Current technology typically involves applying a waterproof layer to the concrete surface during installation to prevent seepage. However, since the concrete pavement is not integrally constructed with other structures, cracks may still exist that allow water to penetrate to the bottom of the concrete, leading to micro-crack formation.

[0004] Therefore, we propose a steel fiber reinforced concrete bridge deck pavement structure to address the problems mentioned above.

[0005] The information disclosed above in this background section is only for enhancing the understanding of the background section of this invention, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a steel fiber reinforced concrete bridge deck pavement structure to solve the problems currently found in the market as mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides a steel fiber reinforced concrete bridge deck pavement structure, including a base layer, a subbase layer, and a surface layer. The subbase layer includes a reinforced concrete layer, a steel fiber reinforced concrete layer, and a first fiberglass cloth layer. The first fiberglass cloth layer is laid between the reinforced concrete layer and the steel fiber reinforced concrete layer. The reinforced concrete layer is provided with a connector that passes through the first fiberglass cloth layer and extends into the steel fiber reinforced concrete layer. Prestressed cables are also laid in the steel fiber reinforced concrete layer.

[0008] The surface layer includes a second fiberglass cloth layer, a heat insulation layer, a second moisture-proof layer, a wear-resistant layer, and a topcoat layer arranged from bottom to top, with the second fiberglass cloth layer laid on the upper surface of the steel fiber concrete layer;

[0009] The upper surface of the base layer is covered with a first moisture-proof layer, and the reinforced concrete layer is laid on the first moisture-proof layer.

[0010] Preferably, the randomly distributed steel fibers in the steel fiber reinforced concrete layer include at least two types: cold-drawn steel wire fibers and hooked steel fibers.

[0011] Preferably, the connector is arrow-shaped and is vertically disposed in the reinforced concrete layer and the steel fiber reinforced concrete layer.

[0012] Preferably, the reinforced concrete layer and the steel fiber reinforced concrete layer are provided with mutually aligned expansion joints, and the expansion joints are filled with filler.

[0013] Preferably, the first moisture-proof layer and the second moisture-proof layer are polyurethane coatings.

[0014] Preferably, the base layer includes a grid and a layer of crushed stone laid in the grid.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention strengthens the load-bearing capacity of the bottom by reinforcing the concrete layer, improves the overall resistance to microcracks by incorporating randomly distributed steel fibers into the concrete, reduces the entry of water molecules into the subbase by using a first and second moisture-proof layer, reduces the prestress changes caused by temperature variations within the structure by using expansion joints, prevents the impact of large temperature changes on the internal temperature by using a thermal insulation layer, and establishes a certain prestress pressure on the steel fiber reinforced concrete layer by tensioning the prestressed cables to improve the stiffness of the steel fiber reinforced concrete layer, thus significantly improving the overall resistance to microcracks of the structure.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 for Figure 1 A cross-sectional schematic diagram;

[0020] Figure 3 This is a schematic diagram of the grid structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting component of this utility model.

[0022] In the diagram: 1. Base layer; 2. Subbase layer; 3. Surface layer; 4. First moisture-proof layer;

[0023] 101. Grid mesh; 102. Crushed stone layer;

[0024] 201. Reinforced concrete layer; 202. Steel fiber reinforced concrete layer; 203. First fiberglass cloth layer; 204. Connector; 205. Prestressed cable; 206. Expansion joint; 207. Filler;

[0025] 301. Second fiberglass cloth layer; 302. Thermal insulation layer; 303. Second moisture-proof layer; 304. Wear-resistant layer; 305. Topcoat layer. Detailed Implementation

[0026] 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. It should be noted that the drawings are schematic and not illustrated to scale. For clarity and convenience, the relative sizes and proportions of the parts shown in the drawings have been exaggerated or reduced in size. Any size is only illustrative and not limiting.

[0027] Please see Figures 1-4 A steel fiber reinforced concrete bridge deck pavement structure includes: a base layer 1, a subbase layer 2, and a surface layer 3, arranged sequentially from bottom to top;

[0028] The base layer 1 includes a grid 101 and a crushed stone layer 102 laid in the grid 101 to improve the bearing capacity of the shallow foundation layer below the foundation bottom surface, disperse concentrated stress transmitted from the superstructure, and reduce pressure on the underlying soil layer; a first moisture-proof layer 4 is laid on top of the base layer 1; the subbase 2 includes a reinforced concrete layer 201, a first fiberglass cloth layer 203, and a steel fiber reinforced concrete layer 202 arranged from bottom to top, wherein the reinforced concrete layer 201 is laid on top of the first moisture-proof layer 4, and the reinforced concrete layer 201 has the function of further reinforcing the bottom, and can cooperate with the first moisture-proof layer 4 and the first fiberglass cloth layer 203 to prevent the steel fiber reinforced concrete layer 202 from getting damp. To prevent the steel fiber reinforced concrete layer 202 from becoming damp and developing microcracks due to reduced load-bearing capacity, the first fiberglass cloth layer 203 also has a corrosion-resistant function, preventing corrosion of the steel fiber reinforced concrete layer 202. The surface layer 3 includes, from bottom to top, a second fiberglass cloth layer 301, a thermal insulation layer 302, a second moisture-proof layer 303, a wear-resistant layer 304, and a topcoat layer 305. The second fiberglass cloth layer 301 prevents corrosion on the upper surface of the steel fiber reinforced concrete layer 202, and the thermal insulation layer 302 reduces the impact of temperature changes on the steel fiber reinforced concrete layer 202, reduces the expansion and contraction of the steel fiber reinforced concrete layer 202 due to temperature changes, thereby reducing internal stress changes and preventing the formation of microcracks.

[0029] A connector 204 is provided in the reinforced concrete layer 201. The connector 204 is arrow-shaped, with its bottom installed in the reinforced concrete layer 201 and pre-embedded during the pouring of the reinforced concrete layer. The head is left out. After the steel fiber reinforced concrete layer 202 is poured, its head is located in the steel fiber reinforced concrete layer 202, so that the connection between the reinforced concrete layer 201 and the steel fiber reinforced concrete layer 202 is tighter. The randomly distributed steel fibers in the steel fiber reinforced concrete layer 202 include two types: cold-drawn steel wire fibers and hooked steel fibers. Among them, the cold-drawn steel wire fibers have high tensile strength, while the hooked steel fibers have strong fatigue resistance and impact resistance. Prestressed cables 205 are also laid in the steel fiber reinforced concrete layer 202 to provide active support resistance to the steel fiber reinforced concrete layer 202 and enhance the crack resistance of the structure. The reinforced concrete layer 201 and the steel fiber reinforced concrete layer 202 are provided with mutually aligned expansion joints 206, and the expansion joints 206 are provided with filler 207. The filler 207 is made of a material with good extensibility and is not easy to absorb water. When the temperature changes cause the reinforced concrete layer 201 and the steel fiber reinforced concrete layer 202 to expand and contract, the reserved expansion joints 206 reduce the impact of internal stress changes.

[0030] The working principle of this embodiment is as follows: The first moisture-proof layer 4 and the second moisture-proof layer 303 prevent excessive water molecules from entering above and below the cushion layer 2, thus avoiding a decrease in concrete strength due to moisture. The reinforced concrete layer 201 further strengthens the load-bearing capacity of the bottom. The steel fiber reinforced concrete layer 202 incorporates randomly distributed steel fibers to achieve the effect of resisting micro-cracks. The prestressed cables 205 set in the steel fiber reinforced concrete layer 202 are set before laying the steel fiber reinforced concrete layer 202. A certain prestress is established by tensioning the prestressed cables 205, which effectively controls cracking caused by concrete shrinkage and temperature stress.

[0031] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0032] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel fiber reinforced concrete bridge deck pavement structure, comprising a base layer (1), a subbase layer (2), and a surface layer (3), characterized in that, The cushion layer (2) includes a reinforced concrete layer (201), a steel fiber reinforced concrete layer (202), and a first fiberglass cloth layer (203). The first fiberglass cloth layer (203) is laid between the reinforced concrete layer (201) and the steel fiber reinforced concrete layer (202). The reinforced concrete layer (201) is provided with a connector (204). The connector (204) passes through the first fiberglass cloth layer (203) and extends into the steel fiber reinforced concrete layer (202). The steel fiber reinforced concrete layer (202) is also provided with prestressed cables (205). The surface layer (3) includes a second fiberglass cloth layer (301), a heat insulation layer (302), a second moisture-proof layer (303), a wear-resistant layer (304), and a topcoat layer (305) arranged from bottom to top. The second fiberglass cloth layer (301) is laid on the upper surface of the steel fiber concrete layer (202). The upper surface of the base layer (1) is covered with a first moisture-proof layer (4), and the reinforced concrete layer (201) is laid on the first moisture-proof layer (4).

2. The steel fiber reinforced concrete bridge deck pavement structure according to claim 1, characterized in that: The randomly distributed steel fibers in the steel fiber reinforced concrete layer (202) include at least two types: cold-drawn steel wire fibers and hooked steel fibers.

3. The steel fiber reinforced concrete bridge deck pavement structure according to claim 1, characterized in that: The connector (204) is arrow-shaped and is vertically installed in the reinforced concrete layer (201) and the steel fiber reinforced concrete layer (202).

4. The steel fiber reinforced concrete bridge deck pavement structure according to claim 1, characterized in that: The reinforced concrete layer (201) and the steel fiber reinforced concrete layer (202) are provided with mutually aligned expansion joints (206), and the expansion joints (206) are provided with filler (207).

5. The steel fiber reinforced concrete bridge deck pavement structure according to claim 1, characterized in that: The first moisture-proof layer (4) and the second moisture-proof layer (303) are polyurethane coatings.

6. The steel fiber reinforced concrete bridge deck pavement structure according to claim 1, characterized in that: The base layer (1) includes a grid (101) and a gravel layer (102) laid in the grid (101).

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