Prefabricated prestressed concrete pavement slab for airport runway
By incorporating prestressed steel mesh and reinforcing ribs inside the concrete pavement slab, the problem of easily damaged edges and corners is solved, improving the overall strength and durability of the pavement slab and meeting the usage requirements of airport runways.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-31
AI Technical Summary
The edges and corners of existing concrete pavement panels are easily damaged, resulting in chipping and corner breakage, which fails to meet the requirements of airport runways for stress performance, load-bearing capacity, and deformation resistance.
A prestressed steel mesh, including longitudinal and transverse steel bars, is installed inside the concrete pavement slab. Corner reinforcement bars are provided at the corners, and edge reinforcement bars are provided on the sides. Anchor plates are used to fix it, forming a double-layer steel mesh structure to improve the strength of the corners.
It improves the crack resistance and overall strength of concrete pavement panels, avoids edge and corner damage, enhances overall durability and load-bearing capacity, and meets the usage requirements of airport runways.
Smart Images
Figure CN224063209U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airport pavement technology, and in particular to a precast prestressed concrete pavement panel for airport runways. Background Technology
[0002] Prefabricated pavement panels are an important component of prefabricated airport pavements. Airport pavements have high requirements for the stress performance, load-bearing capacity, and deformation resistance of pavement panels. However, the edges and corners of prefabricated pavement panels are weak points and are prone to damage during installation and use, resulting in chipped edges and corners.
[0003] Therefore, there is an urgent need for a precast prestressed concrete pavement panel for airport runways that can meet the requirements of airport runways for stress performance, load-bearing capacity and deformation resistance, strengthen the corners of the pavement panel, and facilitate construction and assembly. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a precast prestressed concrete pavement panel for airport runways, which solves the technical problem that the edges and corners of existing concrete pavement panels are easily damaged.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:
[0008] A precast prestressed concrete pavement panel for airport runways includes a panel body and prestressed steel bars disposed inside the panel body.
[0009] The panel body has a rectangular structure, and the prestressed steel bars include longitudinal steel bars arranged in a transverse array within the panel body and transverse steel bars arranged in a longitudinal array within the panel body. The longitudinal steel bars and the transverse steel bars intersect perpendicularly to form a steel mesh.
[0010] Each corner of the panel body is also provided with a corner reinforcing rib, one end of the plurality of corner reinforcing ribs intersects at the corner of the panel body, and the other end of the corner reinforcing ribs extends toward the center of the panel body;
[0011] Each side of the panel body is provided with a corresponding edge reinforcing rib, and the extension direction of the edge reinforcing rib is parallel to the side on which it is located, so that the edge reinforcing rib density is greater than that of the central reinforcing rib mesh.
[0012] The concrete pavement panel also includes anchor plates, which are circular in shape. The anchor plates are respectively disposed at both ends of each prestressed steel bar, and the prestressed steel bars pass through the anchor plates and are threadedly fixed to the anchor plates.
[0013] The anchor plate, the prestressed steel bars, the corner reinforcing bars and the edge reinforcing bars are all cast inside the panel body.
[0014] The panel body is provided with a double layer of steel mesh;
[0015] Multiple longitudinal steel bars in each layer are arranged at equal intervals along the length of the panel body on the same horizontal plane, and multiple transverse steel bars are arranged at equal intervals along the width of the panel body on the same horizontal plane.
[0016] The edge reinforcing bars include longitudinal edge reinforcing bars and transverse edge reinforcing bars. The longitudinal edge reinforcing bars are arranged along the length direction of the panel body, and the transverse edge reinforcing bars are arranged along the width direction of the panel body. Multiple longitudinal edge reinforcing bars and transverse reinforcing bars intersect perpendicularly, and multiple transverse edge reinforcing bars and longitudinal reinforcing bars intersect perpendicularly.
[0017] The longitudinal reinforcement bars are made of steel bars with a diameter of 8-10mm, and the transverse reinforcement bars are made of steel bars with a diameter of 8-10mm.
[0018] Double-layer corner reinforcing ribs are provided at each corner of the panel body, and the included angle between multiple corner reinforcing ribs located on the same horizontal plane is an acute angle.
[0019] The corner reinforcing bars are made of steel bars with a diameter of 12-14mm, and the edge reinforcing bars are made of steel bars with a diameter of 12-14mm.
[0020] The side of the panel body is provided with a mounting groove for inserting reinforcing bars at the joint.
[0021] (III) Beneficial Effects
[0022] The beneficial effects of this utility model are: This utility model provides a precast prestressed concrete pavement panel for airport runways, in which prestressed steel bars are set inside the panel body to improve the crack resistance of the concrete pavement panel.
[0023] The ends of prestressed steel bars are equipped with anchor plates, which can enhance the restraint effect at the ends of prestressed steel bars, save steel for anchorage, reduce costs, and overcome the problems of crowding and difficult concrete pouring in traditional bent bar anchorage.
[0024] The corners of the panel body are equipped with double-layered corner reinforcing ribs. One end of the corner reinforcing ribs intersects, and the other end extends towards the middle of the panel body. By setting corner reinforcing ribs, the corner strength of the concrete pavement panel can be strengthened, and the corners of the concrete pavement panel can be prevented from being damaged during installation and use, resulting in corner chipping.
[0025] Each side of the panel body is equipped with double-layer, bidirectional edge reinforcement. The edge reinforcement intersects with the prestressed tendons set inside the panel body to form a steel mesh with a higher edge reinforcement density than the middle reinforcement density. This enhances the edge strength of the concrete pavement panel and prevents edge damage and chipping during installation and use.
[0026] By adding corner and edge reinforcing ribs, the overall durability and strength of the concrete pavement slab are improved, thus meeting the requirements for the use of precast concrete pavement slabs in airport runways.
[0027] The concrete pavement slabs are prefabricated in the factory. The concrete pavement slabs have a rectangular structure and installation grooves on the sides. The installation grooves are used to put the reinforcing bars at the joints, so that the joints between adjacent concrete pavement slabs can be filled with reinforcing bars before pouring, thereby improving the integrity and load transfer capacity between adjacent concrete pavement slabs. Attached Figure Description
[0028] Figure 1 This is a three-dimensional structural diagram of the precast prestressed concrete pavement panel of this utility model.
[0029] Figure 2 This is a top view of the precast prestressed concrete pavement slab of this utility model.
[0030] Figure 3 This is a longitudinal sectional view of the precast prestressed concrete pavement panel of this utility model.
[0031] Figure 4 This is a cross-sectional view of the precast prestressed concrete pavement panel of this utility model.
[0032] Figure 5 This is a schematic diagram of the prestressed steel bar and anchor plate of this utility model.
[0033] While exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.
[0034] [Explanation of Labels in the Attached Image]
[0035] 1: Main panel;
[0036] 2: Prestressed steel bars;
[0037] 3: Corner reinforcement ribs;
[0038] 4: Longitudinal reinforcement;
[0039] 5: Horizontal reinforcement bars;
[0040] 6: Longitudinal edge reinforcement;
[0041] 7: Transverse edge reinforcement;
[0042] 8: Anchor plate. Detailed Implementation
[0043] To better explain and facilitate understanding of this invention, exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings.
[0044] See appendix Figure 1-4 As shown, this utility model embodiment provides a precast prestressed concrete pavement panel for airport runways, including a panel body 1 and prestressed steel bars 2 disposed inside the panel body 1. The panel body 1 has a rectangular structure. Two layers of corner reinforcing bars 3 are provided at each corner of the panel body 1. One end of the corner reinforcing bars 3 intersects at the corner of the panel body 1, and the other end of the corner reinforcing bars 3 extends towards the middle of the panel body 1. The included angle between adjacent corner reinforcing bars 3 at the same corner on the same horizontal plane is an acute angle. By setting double layers of corner reinforcing bars 3, the weak corner parts of the panel body 1 are strengthened. Two layers of edge reinforcing bars are provided at each corresponding edge of the panel body 1. By setting edge reinforcing bars, the steel bar density at the edge of the steel mesh is increased, and the edge strength of the concrete pavement panel is improved, thereby making the overall durability and longevity of the concrete pavement panel good, and avoiding damage to the concrete pavement panel during installation and use, such as chipping or chipping of edges and corners.
[0045] The panel body 1 is prefabricated in the factory using concrete. The panel body 1 has a rectangular structure and an installation groove on the side. The installation groove is used to put the reinforcing bars at the joint, so that the joint between adjacent concrete pavement panels can be filled with reinforcing bars before pouring, thereby enhancing the connection strength and load transfer capacity between adjacent concrete pavement panels and avoiding the generation of concentrated stress that could damage the panel joint.
[0046] The panel body 1 is equipped with double-layer bidirectional prestressed steel bars 2. The prestressed steel bars 2 adopt the pre-tensioning method, that is, before the panel body 1 is poured, the steel bars need to be tensioned first. After tensioning, the panel body 1 is poured with concrete, so that the prestressed steel bars 2 are kept in tension and set inside the panel body 1 to form a prestressed concrete paving panel.
[0047] Prestressed steel bars 2 are installed within the panel body 1. The prestressed steel bars 2 include longitudinal steel bars 4 and transverse steel bars 5. Multiple longitudinal steel bars 4 are arranged at equal intervals along the length of the panel body 1 on the same horizontal plane, and multiple transverse steel bars 5 are arranged at equal intervals along the width of the panel body 1 on the same horizontal plane. The longitudinal steel bars 4 and transverse steel bars 5 intersect perpendicularly to form a steel mesh. The prestressed steel bars 2 employ a double layer of longitudinal steel bars 4 and transverse steel bars 5, forming a double-layer steel mesh. By installing prestressed steel bars 2 within the panel body 1, the thickness of the concrete pavement panel can be effectively reduced, saving concrete and transportation costs, and further leveraging the advantages of convenient installation of prefabricated components.
[0048] See appendix Figure 5 As shown, the concrete pavement slab also includes anchor plates 8, which are set at both ends of the prestressed steel bars 2. The prestressed steel bars 2 pass through the anchor plates 8 and are threadedly fixed to the anchor plates 8. The anchor plates 8 and the prestressed steel bars 2 are cast into the concrete pavement slab. The anchor plates 8 are used to enhance the restraint effect at the ends of the prestressed steel bars 2, which can reduce or eliminate the anchorage length of the steel bars, save steel for anchorage, reduce costs, and overcome the problems of crowding and difficult concrete pouring in traditional bent bar anchorage.
[0049] The anchor plate 8 is circular, and the middle part of the anchor plate 8 is provided with a through hole for passing through the prestressed steel bar 2. The inner side of the through hole is provided with a thread for connecting the prestressed steel bar 2.
[0050] The corner restraint of the concrete pavement slab adopts corner reinforcing ribs 3. The corner reinforcing ribs 3 are cast together with the prestressed steel bars 2 into the slab body 1. Double layers of corner reinforcing ribs 3 are provided at each corner of the slab body 1. Multiple corner reinforcing ribs 3 located at the same corner on the same horizontal plane intersect at the corner of the slab body 1 at one end, and the other end of the corner reinforcing ribs 3 extends towards the center of the slab body 1. The included angle between adjacent corner reinforcing ribs 3 is an acute angle. Two layers of corner reinforcing ribs 3 are provided at each corner, and each layer includes multiple corner reinforcing ribs 3. In this embodiment, two corner reinforcing ribs 3 are provided in each layer, and the included angle between the two corner reinforcing ribs 3 is an acute angle.
[0051] The perimeter constraint of the concrete pavement slab is solved by edge reinforcement. Each side of the slab body 1 is provided with double-layer edge reinforcement. The edge reinforcement is cast into the slab body 1 together with the prestressed steel bars 2. The edge reinforcement includes longitudinal edge reinforcement 6 and transverse edge reinforcement 7. The longitudinal edge reinforcement 6 is set along the length direction of the slab body 1, and the transverse edge reinforcement 7 is set along the width direction of the slab body 1. Multiple longitudinal edge reinforcement 6 and transverse steel bars 5 intersect perpendicularly, and multiple transverse edge reinforcement 7 and longitudinal steel bars 4 intersect perpendicularly, so that the edge density of the steel mesh is greater than that in the middle, thereby strengthening the weak parts at the edges.
[0052] In this layer, the longitudinal edge reinforcing bars 6 and the transverse edge reinforcing bars 7 intersect with the longitudinal reinforcing bars 4 and the transverse reinforcing bars 5 on the same horizontal plane, respectively, forming a steel mesh with a higher edge steel reinforcement density than the middle steel reinforcement density, thereby improving the edge strength of the concrete pavement slab.
[0053] By setting double-layer, bidirectional corner reinforcing ribs 3 to strengthen the weak corner parts of the panel body 1, and by setting double-layer, bidirectional edge reinforcing ribs to strengthen the weak edge parts of the panel body 1, the overall durability and longevity of the concrete pavement panel are improved, preventing damage to the concrete pavement panel during installation and use, and avoiding the phenomenon of edge or corner chipping. This enhances the overall strength and load-bearing capacity of the concrete pavement panel, so as to meet the requirements of precast concrete pavement panels for use in airport runways.
[0054] The concrete pavement panels are 5.0m long, 2.5m wide, and 240mm thick. They are prefabricated in the factory, making them easy to transport. The size and weight of each panel are moderate, facilitating installation and allowing operation with conventional lifting equipment. They also meet modular requirements, facilitating assembly and offering good economic benefits. The factory-precast concrete itself is of high quality and durability. The use of prestressed steel reinforcement further enhances its resistance to cracking and fatigue, resulting in low maintenance costs.
[0055] The spacing between the double-layer prestressed steel bars 2 is 120mm. The longitudinal steel bars 4 use 8mm diameter steel bars, the transverse steel bars 5 use 9mm diameter steel bars, the corner reinforcing bars 3 use 12mm diameter steel bars, and the edge reinforcing bars use 12mm diameter steel bars. Through the overall reinforcement structure of the prestressed concrete pavement slab, the use of prestressed steel bars 2 effectively reduces the slab thickness, saves concrete and transportation costs, and better leverages the advantages of prefabricated construction. By configuring prestressed steel bars 2, the load-bearing performance, fatigue resistance, and durability requirements of the precast prestressed concrete pavement slab can be guaranteed, making it suitable for use in airport runways.
[0056] In the description of this utility model, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0057] 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0058] 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 indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.
[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A precast prestressed concrete pavement panel for use in an airport runway, characterized by, The panel body (1) and the prestressed steel bars (2) arranged inside the panel body (1); The panel body (1) is in a rectangular structure, the prestressed steel bars (2) include longitudinal steel bars (4) arranged in the panel body (1) in a transverse array and transverse steel bars (5) arranged in the panel body (1) in a longitudinal array, the longitudinal steel bars (4) and the transverse steel bars (5) are perpendicular to each other to form a steel bar mesh; Each corner of the panel body (1) is further provided with a corner reinforcing bar (3), one end of a plurality of the corner reinforcing bars (3) meets at a corner of the panel body (1), and the other end of the corner reinforcing bar (3) extends to the middle part of the panel body (1); Each side of the panel body (1) is correspondingly provided with a side reinforcing bar, and the extending direction of the side reinforcing bar is parallel to the side where the side reinforcing bar is located, so that the steel bar mesh with the side steel bar density being greater than the middle steel bar density.
2. The prefabricated prestressed concrete pavement panel for an airport runway according to claim 1, further comprising anchor plates (8), the anchor plates (8) are in a circular ring shape, the anchor plates (8) are respectively arranged at two ends of each of the prestressed steel bars (2), the prestressed steel bars (2) pass through the anchor plates (8) and are in threaded fixed connection with the anchor plates (8); The anchor plates (8), the prestressed steel bars (2), the corner reinforcing bars (3) and the side reinforcing bars are all cast in the panel body (1).
3. The prefabricated prestressed concrete pavement panel for an airport runway according to claim 2, wherein a plurality of the longitudinal steel bars (4) of each layer are arranged at equal intervals along the length direction of the panel body (1) in the same horizontal plane, and a plurality of the transverse steel bars (5) are arranged at equal intervals along the width direction of the panel body (1) in the same horizontal plane.
4. The prefabricated prestressed concrete pavement panel for an airport runway according to claim 3, wherein the side reinforcing bar includes a longitudinal side reinforcing bar (6) and a transverse side reinforcing bar (7), the longitudinal side reinforcing bar (6) is arranged along the length direction of the panel body (1), the transverse side reinforcing bar (7) is arranged along the width direction of the panel body (1), a plurality of the longitudinal side reinforcing bars (6) and the transverse steel bars (5) are perpendicular to each other, and a plurality of the transverse side reinforcing bars (7) and the longitudinal steel bars (4) are perpendicular to each other. The panel body (1) is internally provided with double layers of the reinforcing mesh ； 5. The prefabricated prestressed concrete pavement panel for an airport runway according to claim 3, wherein the longitudinal steel bars (4) are steel bars with a diameter of 8-10 mm, and the transverse steel bars (5) are steel bars with a diameter of 8-10 mm.
6. The prefabricated prestressed concrete pavement panel for an airport runway according to claim 2, wherein double-layer corner reinforcing bars (3) are respectively arranged at each corner of the panel body (1), and the included angle between a plurality of the corner reinforcing bars (3) in the same horizontal plane is an acute angle.
7. The prefabricated prestressed concrete pavement panel for an airport runway according to claim 6, The corner reinforcing rib (3) is made of steel bars with a diameter of 12-14 mm, and the edge reinforcing rib is made of steel bars with a diameter of 12-14 mm.
8. The precast prestressed concrete pavement panel for airport runway according to claim 1, characterized in that, The side surface of the panel body (1) is provided with a mounting groove for the steel bars at the joint.