Bridge expansion joint cover plate

Abstract

The utility model discloses a bridge expansion joint cover plate which is integrally formed by performing compression molding on a fiber reinforced composite material through a compression molding process, and comprises a plate body which is constructed as a rectangular base plate and comprises a first surface and a second surface, a reinforcing structure is arranged on the first surface, and a flat supporting surface is provided on the second surface. The reinforcing structure protrudes from the first surface and comprises two first reinforcing end edge plates which are arranged on the two opposite end edges of the bridge expansion joint cover plate respectively and continuously arranged from one end to the other end along the end edges in the width direction of the bridge expansion joint cover plate. The bridge expansion joint cover plate comprises two first reinforcing end edge plates, a plurality of first plate-shaped reinforcing ribs are arranged between the two first reinforcing end edge plates, the first plate-shaped reinforcing ribs intersect with the width direction of the bridge expansion joint cover plate, the end of at least one part of the first plate-shaped reinforcing ribs is connected with the first reinforcing end edge plates, and continuous glass fibers are arranged in the plate-shaped reinforcing ribs. The cover plate can be repeatedly used, is light in weight, facilitates carrying and installation, and saves manpower and gravel materials.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge facilities, in particular to the technical field of bridge expansion joint construction or parts for bridge construction. Background Art

[0002] Bridge expansion joints are a special structural design that can avoid or reduce damage to bridge structures due to the expansion and contraction of bridges caused by the natural environment, such as thermal expansion and contraction, earthquakes, etc. In the design of expansion joints, in order to ensure the expansion and contraction of bridges, a certain length of expansion joints needs to be reserved during the installation of the bridge.

[0003] In order to prevent the expansion joints from being damaged during pavement construction, which may cause the expansion joints to not work properly and endanger the safety of the bridge, the bridge expansion joint device needs to be installed after the pavement construction is completed. In addition, the expansion space between the various parts of the bridge structure can be determined only after the pavement construction is completed. Therefore, installing the expansion joint device after the pavement is installed can more accurately grasp the length of the expansion joint and ensure that it can play a corresponding expansion role, thereby ensuring the safety performance of the bridge.

[0004] The construction method of the existing technology is usually to first fill the expansion joint position with gravel to the height of the bridge deck, and then continuously make concrete paving and asphalt pavement at the expansion joint position like other positions. After the pavement is maintained, the concrete paving and asphalt pavement at the expansion joint position are cut and removed, the gravel that has previously filled the expansion joint is cleaned, and then the expansion joint device is installed.

[0005] The construction process of this prior art not only wastes the gravel materials in the concrete paving and expansion joints, but also requires a lot of manpower to remove the gravel materials in the expansion joints. If the gravel materials in the contraction joints are not removed thoroughly, it may affect the installation of the expansion joint device and even affect the service life of the bridge.

[0006] The following patent publications of the prior art are cited for reference.

[0007] Patent Document 1

[0008] Patent publication number CN205529871U, application number CN201620065747.X, titled "A high-strength bridge expansion joint cover plate", application date 2016-01-22, publication (announcement) date: 2016-08-31, applicant, Hunan Fourth Engineering Co., Ltd. This utility model provides a high-strength bridge expansion joint cover plate, belonging to the field of bridge facilities. It solves the problem of low strength of existing expansion joint cover plates. The high-strength bridge expansion joint cover plate includes a left bridge and a right bridge with a gap therebetween and respectively having a left retaining edge and a right retaining edge, and also includes a left base and a right base respectively fixed to the left retaining edge and the right retaining edge, a baffle is provided on the left base, and a support strip is provided on the right base, the baffle covers the gap, and the end of the baffle is supported on the support strip, and a concrete layer is poured on the opposite side of the left base and the right base, and the top surface of the baffle is flush with the top surface of the concrete layer, and the top surface of the baffle is paved with an asphalt layer located on the bridge deck of the left bridge, and also includes a cover plate bent and fixed to the end of the baffle, the cover plate is located on the right bridge, and the bottom of the cover plate is paved with an asphalt layer located on the bridge deck of the right bridge. When the left bridge and the right bridge are displaced, they are repaired by the cover plate, and when a vehicle passes over the cover plate, the bridge deck of the right bridge can be stressed, and the strength of the cover plate can be improved.

[0009] Patent Document 2

[0010] Publication number CN115288031A, application number CN202211059688.1, titled "A construction method for a temporary expansion joint of a bridge", application date 2022-08-31, publication (announcement) date 2022-11-04, applicant (patent right), Jiangxi Transportation Engineering Group Co., Ltd. The invention provides a construction method for a temporary expansion joint of a bridge, the method comprising the following steps: construction preparation; cleaning the original ground; setting the foundation: setting a plurality of square timbers at the bottom of the expansion joint, laying a plurality of bamboo plywoods on the top of the plurality of square timbers, laying a lower geotextile on the top of the plurality of bamboo plywoods and fixing them; dense filling: laying melon stones on the lower geotextile, compacting and checking the elevation through caulking construction equipment, laying an upper geotextile on the top of the melon stones, and setting composite foam boards around the top surface of the upper geotextile; pouring concrete and curing; strength testing and opening traffic. The construction method of temporary expansion joints of bridges proposed in this invention has strong construction operability, high overall quality image, good safety and stability, and is low-carbon, environmentally friendly and sustainable, with extremely low maintenance costs, and can well meet actual application needs.

[0011] Patent document 3, publication number CN111809512A, application number: CN202010679739.5, entitled "A method for temporarily blocking the expansion joint of a simply supported beam bridge", application date 2020-07-15, publication (announcement) date: 2020-10-23. The technical solution provides a method for temporarily blocking the expansion joint of a simply supported beam bridge, the method comprising the following steps: installing the beam slab on the qualified bridge substructure according to the design requirements; making a height-adjustable blocking device according to the design drawings of the bridge expansion joint; after tying the bridge pavement steel bars and supporting the formwork according to the design drawings, pouring concrete, and reserving a groove at the end of the expansion joint along the longitudinal beam of the bridge during the concrete pouring; installing the height-adjustable blocking device on the groove according to the height difference between the groove at the expansion joint and the corresponding beam slab position, and supporting the middle position of the blocking device through the beam slab; spreading asphalt on the bridge deck. The invention provides a sealing device at the expansion joint after the bridge deck is paved and before the asphalt is spread to seal the expansion joint, thereby ensuring that the expansion joint is temporarily sealed densely, ensuring the quality of asphalt paving and providing convenience for some construction vehicles to pass.

[0012] Patent Document 4

[0013] Chinese patent application number CN201821850669.X, publication number CN209260545U, entitled "A bridge expansion joint", applicants Shaanxi Communications and Highway Design Institute Co., Ltd., Shaanxi Communications and Highway Design Institute Co., Ltd. This utility model belongs to the technical field of bridge expansion joints, and aims to provide a bridge expansion joint, the technical solution of which includes two adjacent bridge expansion bodies, an expansion joint device fixedly connected to the bridge expansion body, the expansion joint device includes two steel plates fixedly connected to the bridge expansion body, a clamping claw fixedly connected to the outer wall of the steel plate, and a connecting plate slidably connected to the end of the steel plate, the clamping claw is fixedly inserted in the bridge expansion body, the steel plate is vertically arranged with the bridge body, the expansion joint device is symmetrically arranged about the width direction of the two bridge expansion bodies, and a clamping groove is opened at the upper end of the steel plate, and a telescopic cover plate is clamped in the clamping groove; this bridge expansion joint is added with a telescopic cover plate in the bridge expansion joint, so that the telescopic cover plate is clamped and sealed with the bridge expansion joint, thereby enhancing the sealing of the entire bridge expansion joint, preventing dust and impurities from entering the bridge expansion joint, ensuring the quality and rigidity of the bridge expansion joint, and thus ensuring the quality of the bridge.

[0014] Patent Document 5

[0015] Chinese patent publication number CN211036685U, application number CN201921541354.1,

[0016] Titled "A Bridge Expansion Joint Cover", the applicant is Guangzhou Maojian Road and Bridge Engineering Technology Co., Ltd., etc. This utility model relates to the field of bridge construction technology, and discloses a bridge expansion joint cover, including a left bridge body, a right bridge body and an expansion joint between the left bridge body and the right bridge body, the upper end covers of the left bridge body and the right bridge body are connected with a sealing cover located on the upper side of the expansion joint, the left and right ends of the sealing cover are provided with grooves, the bottom of the groove is fixedly connected to the same extension plate through a plurality of return springs, the end of the extension plate away from the sealing cover is fixedly connected to a positioning block, the surface of the positioning block is provided with a socket, and the socket is connected with a positioning rod inserted in the left bridge body and the right bridge body. The utility model can make the expansion joint cover change accordingly when the expansion joint changes, which is convenient for operation and use.

[0017] Patent Document 6

[0018] Chinese application number or patent number 2018100766004, invention name "A high-strength and strong acid and alkali resistant SMC composite material and a method for making a grid using the same", applicant Hebei Hengrui Composite Materials Co., Ltd., discloses a high-strength and strong acid and alkali resistant SMC composite material and a method for making a grid using the same, the material includes an upper polyethylene film layer, an upper resin paste layer, a chopped glass fiber layer, a continuous glass fiber layer, a lower resin paste layer and a lower polyethylene film layer arranged in sequence from top to bottom; the upper resin paste layer and the lower resin paste layer are The fat paste layer has the same composition and is composed of the following materials in parts by weight: 60-70 parts of linear phenolic modified vinyl resin, 30-40 parts of low shrinkage additive, 100-150 parts of nano-barium sulfate powder, 2.5-4 parts of magnesium oxide paste thickener, 1.0-2.0 parts of curing agent BPO, 2-4 parts of coupling agent, and 3-5 parts of color paste; the SMC composite material of the invention has high compressive and tensile strength and is resistant to strong acid and alkali corrosion. The SMC molded grille made of it has strong resistance to strong acid and alkali corrosion, high mechanical compressive strength and a smooth surface.

[0019] All of the above-cited publications are incorporated herein by reference. Utility Model Content

[0020] The purpose of the present invention is to provide a cover plate as a temporary cover plate for bridge expansion joints, which can be reused many times, is light in weight, is easy to carry and install, and saves a lot of labor and sand and gravel materials.

[0021] In order to achieve the purpose of the utility model, the first aspect of the utility model provides the following solutions:

[0022] A bridge expansion joint cover plate is integrally molded by a fiber-reinforced composite material through a compression molding process. It includes: a plate body, configured as a rectangular substrate, including a first surface and a second surface. Among them, a strengthening configuration is provided on the first surface, and a flat support surface is provided on the second surface. The strengthening configuration protrudes from the first surface and includes: two first strengthening edge plates, respectively arranged at two opposite edges of the bridge expansion joint cover plate, and continuously arranged along the edge from one end to the other end in the width direction of the bridge expansion joint cover plate; between the two first strengthening edge plates, a plurality of first plate-shaped strengthening ribs are arranged, and the plurality of first plate-shaped strengthening ribs intersect with the width direction of the bridge expansion joint cover plate, and at least a part of the ends of the plurality of first plate-shaped strengthening ribs are connected to the first strengthening edge plates. The composition of the fibers in the fiber-reinforced composite material includes: chopped glass fibers and continuous glass fibers, and among them, continuous glass fibers are arranged in each plate-shaped strengthening rib.

[0023] Preferably, further, continuous glass fibers are arranged in the two first strengthening edge plates.

[0024] Preferably, continuous glass fibers are arranged integrally or at intervals within the plate body, and the continuous glass fibers are arranged crosswise with the first plate-shaped strengthening ribs.

[0025] Preferably, continuous glass fibers are arranged integrally within the plate body, and the continuous glass fibers are laid along the width direction of the bridge expansion joint cover plate.

[0026] Preferably, continuous glass fibers are arranged within the plate body, and are evenly arranged or arranged at intervals between the two first strengthening edge plates.

[0027] Preferably, both ends of each first plate-shaped strengthening rib are respectively connected to the two first strengthening edge plates, and the plurality of first plate-shaped strengthening ribs are evenly spaced in the width direction of the bridge expansion joint cover plate.

[0028] Preferably, the plurality of first plate-shaped strengthening ribs are parallel to each other.

[0029] Preferably, the plurality of first plate-shaped strengthening ribs are evenly spaced in a curved plate shape.

[0030] Preferably, the plurality of first plate-shaped strengthening ribs are parallel to each other and the included angle with the first strengthening edge plate is 45° to 90°.

[0031] Preferably, the plurality of first plate-shaped strengthening ribs are parallel to each other and the included angle with the first strengthening edge plate is 60° to 90°.

[0032] Preferably, each first plate-shaped strengthening rib is orthogonal to the first strengthening edge plate.

[0033] Preferably, the width of the plate body is set to 800 mm to 1200 mm, and the length is set to 800 mm to 1200 mm.

[0034] Preferably, the width of the plate body is set to 1000 mm, and the length is selected from: 1160 mm, 1080 mm, 1000 mm, or 920 mm.

[0035] Preferably, the wall thickness of each first plate-shaped reinforcing rib is 14 mm to 16 mm, and the center line spacing of the first plate-shaped reinforcing ribs is set to 54 mm - 57 mm.

[0036] Preferably, the wall thickness of each first plate-shaped reinforcing rib is 19 mm to 26 mm, and the center line spacing of the first plate-shaped reinforcing ribs is set to 75 mm - 80 mm.

[0037] Preferably, the thickness of the plate body is 4 mm to 6 mm.

[0038] Preferably, the thickness of the first reinforcing end edge plate is 4 mm to 15 mm.

[0039] Preferably, the total amount of glass fiber contained in the fiber-reinforced composite material accounts for 40 - 60% of the weight of the base material, wherein the continuous glass fiber accounts for 75% - 85% of the total glass fiber weight.

[0040] Preferably, continuous glass fiber is also arranged in the plate body, and the arrangement direction of the continuous glass fiber arranged in the plate body intersects with the arrangement direction of the continuous glass fiber in the first plate-shaped reinforcing rib.

[0041] Preferably, the laying direction of the continuous glass fiber in the first plate-shaped reinforcing rib is consistent with the length direction of the first plate-shaped reinforcing rib.

[0042] Preferably, the laying direction of the continuous glass fiber in the two first reinforcing end edge plates is consistent with the width direction of the bridge expansion joint cover plate.

[0043] Preferably, it further includes a plurality of second plate-shaped reinforcing ribs protruding from the first surface, and the second plate-shaped reinforcing ribs intersect with the plurality of first plate-shaped reinforcing ribs.

[0044] Preferably, in the strengthened configuration area, the weight percentage of the continuous glass fiber contained in the base material is 40% - 60%.

[0045] Through the configuration design for special applications and the fiber distribution design for fiber-reinforced composite materials, the preferred product provided by the present disclosure can achieve the following effects for the application of the temporary lap plate of the bridge expansion joint in bridge construction:

[0046] 1. The cover plate product has high strength, especially providing directional reinforcement in the longitudinal direction of the bridge.

[0047] 2. After using the temporary cover plate of the expansion joint, there is no need to fill the expansion joint with sand and gravel, and there is no need to make a concrete paving layer at the position of the expansion joint installation device, saving materials such as sand and gravel and the labor for paving sand and gravel and concrete layers.

[0048] 3. Light in weight, the weight per square meter can be controlled at about 50 Kg, suitable for two-person carrying and construction. In comparison, for example, a 25-mm thick steel plate can also bear a 60-ton heavy-duty vehicle, with a weight per square meter of about 200 Kg. Therefore, lifting equipment is required for operation and construction cannot be simply completed by manual operation.

[0049] 4. The bridge expansion joint cover plate of the present disclosure can be reused as a lapping plate in bridge construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. The drawings are included to provide a further understanding of the present disclosure and are included in this specification and form a part of this specification.

[0051] Figure 1 The perspective view shows an embodiment of the bridge expansion joint cover plate of the present disclosure;

[0052] Figure 2 The perspective view shows an embodiment of the bridge expansion joint cover plate of the present disclosure;

[0053] Figure 3 The perspective view shows an embodiment of the bridge expansion joint cover plate of the present disclosure;

[0054] Figure 4 The perspective view shows an embodiment of the bridge expansion joint cover plate of the present disclosure;

[0055] Figure 5 The temporary use state of the embodiment of the bridge expansion joint cover plate of the present disclosure in bridge construction; and

[0056] Figure 6 An embodiment of the bridge expansion joint cover plate of the present disclosure, schematic diagram of continuous glass fiber distribution in the enhanced configuration;

[0057] Figure 7 An embodiment of the bridge expansion joint cover plate of the present disclosure, schematic diagram of continuous glass fiber distribution in the plate body (substrate); and

[0058] Figure 8 The perspective view shows an embodiment of the bridge expansion joint cover plate of the present disclosure.

[0059] DESCRIPTION OF REFERENCE NUMERALS:

[0060] 1 Bridge expansion joint cover plate

[0061] 10 Plate body (substrate)

[0062] 12 First surface (provided with enhanced configuration)

[0063] 14 Second surface (providing a support surface)

[0064] 16 First reinforcing end edge plate

[0065] 18 First plate-shaped reinforcing rib

[0066] 20 Second plate-shaped reinforcing rib

[0067] 24 Continuous glass fiber

[0068] 26 Screw mounting hole

[0069] 30 Beam slab

[0070] 32 Asphalt pavement

[0071] 34 Filling material

[0072] 36 Concrete paving layer

[0073] 38 Expansion joint. Specific implementation manners

[0074] The following further details the present disclosure in conjunction with the drawings and implementation manners. It can be understood that the specific implementation manners described herein are only used to explain the relevant content and do not limit the present disclosure. Additionally, it should be noted that for the convenience of description, only parts related to the present disclosure are shown in the drawings.

[0075] It should be noted that, without conflict, the implementation manners in the present disclosure and the features in the implementation manners can be combined with each other. The following will detail the technical solutions of the present disclosure with reference to the drawings and in conjunction with the implementation manners.

[0076] Unless otherwise specified, the exemplary implementation manners / embodiments shown are understood to provide exemplary features of various details of some ways that can implement the technical concept of the present disclosure in practice. Therefore, unless otherwise specified, without departing from the technical concept of the present disclosure, the features of various implementation manners / embodiments can be additionally combined, separated, interchanged, and / or rearranged.

[0077] In the drawings, cross-hatching and / or shading are generally used to make the boundaries between adjacent components clear. Thus, unless stated, the presence or absence of cross-hatching or shading does not convey or imply any preference or requirement for the specific material, material properties, dimensions, ratios, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. Additionally, in the drawings, for clarity and / or descriptive purposes, the dimensions and relative dimensions of the components may be exaggerated. When the exemplary embodiments can be implemented differently, the specific process sequences can be executed in an order different from that described. For example, two consecutively described processes can be executed substantially simultaneously or in an order opposite to that described. Moreover, the same reference numerals denote the same components.

[0078] When a component is referred to as being "on" or "above" another component, "connected to" or "coupled to" another component, the component can be directly on the other component, directly connected to or directly coupled to the other component, or there can be intervening components. However, when a component is referred to as being "directly on" another component, "directly connected to" or "directly coupled to" another component, there are no intervening components. For this reason, the term "connected" can refer to physical connection, electrical connection, etc., and can have or not have intervening components.

[0079] For descriptive purposes, the present disclosure may use spatial relative terms such as "beneath", "below", "under", "underneath", "above", "on", "over", "upper", and "side (e.g., as in "sidewall")" etc., so as to describe the relationship of one component to another (other) component as shown in the drawings. In addition to the orientation depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacturing. For example, if the device in the drawings is flipped, a component described as "beneath" or "below" another component or feature will then be positioned "above" the other component or feature. Thus, the exemplary term "beneath" can encompass both "above" and "below" orientations. Additionally, the device can be otherwise positioned (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptors used herein are to be interpreted.

[0080] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are also intended to include the plural forms. Additionally, when the terms "comprise" and / or "include" and their variants are used in this specification, it is stated that there are the recited features, integers, steps, operations, components, assemblies, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, assemblies, and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about", and other similar terms are used as approximate terms and not as terms of degree, so they are used to explain the inherent deviations of measured, calculated, and / or provided values that would be recognized by a person of ordinary skill in the art.

[0081] Specifically, the present disclosure provides a bridge expansion joint cover plate 1, particularly a temporary cover plate or lap plate applied during the construction of bridges, road surfaces, and the installation and treatment of bridge expansion joint devices. Refer to the attached Figure 5, which shows a typical application state of the bridge expansion joint cover plate 1 of the present disclosure. During the bridge construction process, the position of the expansion joint 38 is reserved. However, the specific parameters and expansion space of the expansion joint device can only be finally determined after the pavement construction is completed. The bridge expansion joint cover plate 1 covers the reserved expansion joint area and provides a temporary sealing function. It is roughly flush with the concrete pavement layer 36, replacing the overall laying of the concrete pavement layer in the common process. An asphalt pavement 32 is covered thereon.

[0082] There is also a filling material 34 between the concrete pavement layer 36 and the bridge expansion joint cover plate 1 as a spacer material. For example, a hard plastic sheet is used to facilitate later removal.

[0083] This is an application example of the bridge expansion joint cover plate 1 of the present disclosure to facilitate a further understanding of the technical solution of the present disclosure.

[0084] A geometric strengthening configuration provided by mold design

[0085] The bridge expansion joint cover plate 1 of the present disclosure has an application, for example, replacing the steel plate commonly used as a temporary lap plate in the construction field.

[0086] See the appendix Figure 1 、 2 , the bridge expansion joint cover plate 1 integrally molded by a fiber-reinforced composite material through a compression molding process, as a lap plate in bridge construction, provides a pre-determined specification size. The plate body 10 is configured as a rectangular substrate, which is particularly suitable for covering the reserved size gaps repeatedly carried out on a certain section of the bridge, making the construction method simple and unified.

[0087] Furthermore, the bridge expansion joint cover plate 1 of the present disclosure can significantly reduce weight through enhanced structural design, thereby facilitating storage and transportation, reducing the burden of paving operations, reducing working hours, and reducing the necessary operating machinery.

[0088] See the appendix Figure 1 、 2 , showing an embodiment of the bridge expansion joint cover plate 1 of the present disclosure. Figure 1 Showing the bridge expansion joint cover plate 1, its second surface 14 is facing upwards. The second surface 14 provides a support surface, which is of a flat configuration. In the installed state, it provides support for the road surface, and an asphalt pavement 32 etc. is covered thereon.

[0089] Figure 2 Showing the first surface of the bridge expansion joint cover plate 1, showing the strengthening configurations protruding on the plate body 10. The strengthening configurations are all strengthening ribs, strengthening ribs, etc. protruding from the first surface, such as the configurations provided by the grooves set by the compression molding die.

[0090] The reinforcement configuration includes two first reinforcement end edge plates 16, which are respectively arranged at two opposite end edges of the bridge expansion joint cover plate 1 and are continuously arranged along the end edge from one end to the other end in the width direction of the bridge expansion joint cover plate 1.

[0091] In the use state, for this pair of oppositely arranged first reinforcement end edge plates 16, the two ends of the bridge expansion joint cover plate 1 are placed at the concrete lapping positions of the reserved joint area. In order to ensure the support strength, the first reinforcement end edge plates 16 are set as thickened reinforcing ribs to increase the strength at the lapping position of the bridge expansion joint cover plate 1.

[0092] Therefore, the width direction of the bridge expansion joint cover plate 1 is consistent with the width direction of the bridge or road during installation, or is a direction that is approximately orthogonal to the longitudinal direction of the bridge or road. During installation, the length of the bridge expansion joint cover plate 1 conforms to the longitudinal direction of the bridge or road.

[0093] Furthermore, between the two first reinforcement end edge plates 16, a plurality of first plate-shaped reinforcing ribs 18 are arranged. The plurality of first plate-shaped reinforcing ribs 18 are arranged intersecting with the width direction of the bridge expansion joint cover plate 1 mentioned above, that is to say, intersecting with the extending direction of the two first reinforcement end edge plates 16.

[0094] In Figure 2 In the illustrated embodiment, both ends of the plate-shaped reinforcing rib are respectively connected to the two reinforcement end edge plates 16, and the plurality of plate-shaped reinforcing ribs are evenly spaced in the width direction of the bridge expansion joint cover plate 1.

[0095] In a preferred embodiment, the plurality of first plate-shaped reinforcing ribs 18 are parallel to each other, the two first reinforcement end edge plates 16 are parallel to each other, and the first plate-shaped reinforcing ribs 18 are orthogonal to the first reinforcement end edge plates 16. This arrangement can effectively simplify the mold design, provide practical construction modular products, and facilitate the continuous glass fiber laying in the product enhancement structure described below. In addition, the first plate-shaped reinforcing ribs 18 are orthogonal to the first reinforcement end edge plates 16 at the front and rear two end edges of the bridge expansion joint cover plate 1 and are preferably connected to each other, further framing the array formed by the plurality of first plate-shaped reinforcing ribs 18, thereby providing overall reinforcement through a framed arrangement.

[0096] For practical purposes, the bridge expansion joint cover plate 1 is rectangular, which is easy to be constructed and laid in a repetitive manner. The width of this rectangular cover plate is set to 800 mm to 1200 mm, and the length is set to 800 mm to 1200 mm.

[0097] Preferably, the molded products are provided individually or in combination. For example, four types of rectangular bridge expansion joint cover plates 1 can be optionally provided. The single-section width is set to 1000 mm, and the lengths include: 1160 mm, 1080 mm, 1000 mm, 920 mm, so as to adjust the laying more flexibly.

[0098] For the bridge expansion joint cover plate 1 of the present disclosure, emphasis is placed on the reinforcement in the direction across the expansion joint. That is, on the one hand, the connection strength between the two first reinforcing end edge plates 16 is mainly considered, and deformation can be reduced during load bearing. Therefore, the multiple first plate-shaped reinforcing ribs 18 provided can be in the bridging direction, that is, the longitudinal extension of the road, as shown in the attached Figure 2 figure, where they are arranged in parallel and evenly spaced in the width direction.

[0099] Considering the maximum load on the bridge, which usually occurs when a heavy-duty truck passes, the pressure exerted by the vehicle tires on the bridge surface. The width of the tires of heavy-duty trucks is generally 235 mm. Preferably, the center line spacing of the first plate-shaped reinforcing ribs 18 in the embodiment shown above is set to, for example, 54 mm - 57 mm, preferably about 56 mm, to ensure that when such a vehicle passes, the tires can act on at least three first plate-shaped reinforcing ribs 18 simultaneously. The first plate-shaped reinforcing ribs 18 are set to have a substantially uniform thickness, and the wall thickness of the first plate-shaped reinforcing ribs 18 is set to match their load-bearing condition, for example, the wall thickness is 14 mm to 16 mm, preferably about 15 mm. Figure 1 Optionally, by increasing the wall thickness of the first plate-shaped reinforcing ribs 18, the spacing between the first plate-shaped reinforcing ribs 18 can be increased. It is best to ensure that when the vehicle passes, the tires can act on at least two first plate-shaped reinforcing ribs 18. For example, the wall thickness of each first plate-shaped reinforcing rib 18 is 19 mm to 26 mm, and the center line spacing of the first plate-shaped reinforcing ribs is set to 75 mm - 80 mm, preferably about 76 mm.

[0100] The thickness of the plate body 10 can be selected from 4 mm to 6 mm, and in this embodiment, it is about 5 mm thick.

[0101] The thickness of the first reinforcing end edge plate 16 can be selected from 4 mm to 15 mm, and in this embodiment, it is about 5 mm thick.

[0102]

[0103] Variant of the reinforcement configuration

[0104] In addition to the reinforcement configuration of the above embodiment, the first plate-shaped reinforcing ribs 18 can also be arranged in other ways. For example, referring to Figure 4 , it extends between the two first reinforcing end edge plates 16 in the form of a wavy curved plate, and is also evenly spaced in the width direction of the bridge expansion joint cover plate 1 approximately. In this way, it is more beneficial to share the load-bearing of the tires, and there are more choices for the interval setting, and the reinforcement effect in the width direction is improved.

[0105] Similarly, referring to the attached Figure 3, relative to the multiple first plate-shaped reinforcing ribs 18 arranged longitudinally and in parallel as described above, it can also be arranged at a certain angle with the longitudinal direction (corresponding to the longitudinal direction of the road during laying), and a preferable angle is 5° to 30°. In other words, the optional angle between the first plate-shaped reinforcing rib 18 and the first reinforcing edge plate is 45° to 90°, preferably 60° to 85°. Offsetting the first plate-shaped reinforcing rib 18 at a certain angle in the longitudinal direction can provide more strengthening effects in the width direction and can also increase the number of reinforcing ribs in contact with the tire simultaneously. Setting a smaller longitudinal angle enables as many as possible of the first plate-shaped reinforcing ribs 18 to be connected to the two reinforcing edge plates 16, providing a frame-shaped strengthening effect.

[0106] In addition, referring to Figure 8 , it may further include multiple second plate-shaped reinforcing ribs 20, and the second plate-shaped reinforcing ribs 20 are arranged intersecting with the multiple first plate-shaped reinforcing ribs 18. Such an arrangement can further provide a strengthening effect, but may increase the mold cost and the process operation cost.

[0107] Two-strengthening configuration and continuous glass fiber

[0108] In addition to the strengthening configuration designed specifically for the geometric characteristics of the bridge expansion joint cover plate application, this technical solution is also specifically optimized for fiber-reinforced composites.

[0109] The composition of the fibers in the fiber-reinforced composite material used includes: chopped glass fibers and continuous glass fibers 24, and the chopped glass fibers are not shown in the figure. Continuous glass fibers are arranged within each first plate-shaped reinforcing rib 18, and their laying direction is consistent with the extending direction of the first plate-shaped reinforcing rib 18.

[0110] In a further preferred solution, through the laying process treatment, in addition to arranging the continuous glass fibers 24 within the first plate-shaped reinforcing ribs 18, the continuous glass fibers 24 are also arranged in the two first reinforcing edge plates 16 or in the adjacent areas thereof. In particular, they are also arranged in the plate body 10. The continuous glass fibers 24 arranged in the plate body 10 and the continuous glass fibers 24 arranged in the first reinforcing edge plates 16 intersect or cross with the setting direction of the continuous glass fibers in the first plate-shaped reinforcing ribs 18.

[0111] Continuous glass fibers 24 are arranged integrally within the plate body 10, and the continuous glass fibers 24 are laid in the width direction. They can be laid evenly in the length direction of the plate body 10, or arranged at uniform intervals between the two first reinforcing edge plates 16.

[0112] Referring to the appendix Figure 6 , the first surface 12 of the bridge expansion joint cover plate 1 is schematically shown, and the continuous glass fibers 24 extend within the first plate-shaped reinforcing ribs 18. Typically, the continuous glass fibers 24 are arranged in multiple bundles within the first plate-shaped reinforcing ribs 18. In this strengthening configuration area, the weight percentage of the continuous glass fibers 24 contained in the base material is 40% - 60%.

[0113] Figure 6 The continuous glass fiber 24 within the first reinforcing end edge plate 16 is not shown, and its arrangement is similar to that within the first plate-shaped reinforcing rib 18 described above.

[0114] Figure 7 A schematic diagram showing the distribution of the continuous glass fiber 24 in the plate body 10 of the bridge expansion joint cover plate 1 of the present disclosure is shown.

[0115] The thickness of the plate body 10 is about 5 mm, and the laying direction of the continuous glass fiber 24 intersects with the setting direction of the first plate-shaped reinforcing rib 18 at a certain angle. Optionally, the continuous glass fiber 24 is arranged integrally or laid at approximately evenly spaced intervals within the plate body 10.

[0116] Typically, an SMC sheet for the plate body 10 is prepared in advance, that is, an uncured precursor material before the fiber-reinforced composite material is molded. This material is prepared as a single layer, and it is easy to handle the orientation and distribution of the continuous glass fiber 24 therein.

[0117] Furthermore, an SMC sheet is prepared separately, and the continuous glass fiber 24 is arranged corresponding to the mold grooves, and the grooves correspond to, for example Figure 2 , Figure 3 , Figure 4 In the exemplified embodiment, including two first reinforcing end edge plates 16 and the first plate-shaped reinforcing rib 18, the continuous glass fiber 24 is positioned into a selected reinforcing configuration.

[0118] The fiber-reinforced composite material contains chopped fibers and continuous glass fibers. The chopped fibers are distributed throughout the molded product, and the continuous glass fibers are arranged according to the design scheme to provide a unique reinforcing effect. In this embodiment, the total glass fiber accounts for 40 - 60% of the weight of the base material, and the continuous glass fiber accounts for approximately 80% of the total glass fiber.

[0119] For easy understanding, by way of example, the base material of the fiber-reinforced composite material used mainly includes: chopped glass fibers, continuous glass fibers, and a matrix resin, where the weight percentages of each component are 50% continuous glass fibers, 16% chopped glass fibers, and 34% matrix resin.

[0120] The process and features of the bridge expansion joint cover plate product of the present disclosure:

[0121] 1. In the direction where a larger bearing capacity is required, a sheet with a very high content of continuous glass fiber is arranged at the position of the first plate-shaped reinforcing rib 10 to increase the strength;

[0122] 2. It is formed using a glass fiber-reinforced composite material and a high-temperature and high-pressure process, which has high strength, high rigidity of the material, is not easily deformed when bearing heavy loads, and prevents the asphalt pavement above the overlapping plate from deforming due to the deformation of the overlapping plate;

[0123] The width of the tires of 3 heavy-duty vehicles is generally 235 mm. The rib spacing of the preferred product is set to 56 mm to ensure that the tire can act on at least three ribs. For a commercial concrete mixer truck with a full load of 18 cubic meters, each tire is calculated at 8 tons. When the tire travels to the middle part of the expansion joint lap plate, the deformation of the lap plate is very small, about 7 mm.

[0124] 4 The bridge expansion joint cover plate 1 is lapped with the concrete at both ends as the lap plate, and a thickened strengthening structure, that is, the first strengthened end edge plate 16, is provided at this position to enhance the strength of the lap position.

[0125] 5 Screws can be provided at the four corners of the bridge expansion joint cover plate 1, which is beneficial for hoisting when the bridge expansion joint cover plate 1 is removed.

[0126] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0127] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of these features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0128] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present disclosure, rather than limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A bridge expansion joint cover, characterized in that: The fiber-reinforced composite material is integrally molded by a molding process, and comprises: a plate body, which is constructed as a rectangular substrate, comprising a first surface and a second surface, wherein a reinforcement configuration is provided on the first surface, and a flat support surface is provided on the second surface, The reinforcement structure protrudes from the first surface and includes: Two first reinforcing end edge plates are respectively arranged at two opposite end edges of the bridge expansion joint cover plate, and are continuously arranged along the end edge from one end to the other end in the width direction of the bridge expansion joint cover plate. A plurality of first plate-shaped reinforcing ribs are arranged between the two first reinforcing end edge plates, the plurality of first plate-shaped reinforcing ribs are arranged to intersect with the width direction of the bridge expansion joint cover plate, and at least a portion of the ends of the plurality of first plate-shaped reinforcing ribs are connected to the first reinforcing end edge plates. The fibers in the fiber-reinforced composite material include chopped glass fibers and continuous glass fibers, wherein the continuous glass fibers are arranged in each plate-shaped reinforcement rib.

2. The bridge expansion joint cover according to claim 1, characterized in that: Furthermore, continuous glass fibers are arranged in the two first reinforcing end edge plates.

3. The bridge expansion joint cover according to claim 1, characterized in that: Continuous glass fibers are arranged in the plate body as a whole or at intervals, and the continuous glass fibers are arranged crosswise with the first plate-shaped reinforcement ribs.

4. The bridge expansion joint cover according to claim 1, characterized in that: Continuous glass fibers are arranged integrally in the plate body and are laid along the width direction of the bridge expansion joint cover plate.

5. The bridge expansion joint cover according to claim 1, characterized in that: Continuous glass fibers are arranged in the plate body and are evenly or spaced between the two first reinforcing end edge plates.

6. The bridge expansion joint cover according to claim 1, characterized in that: Both ends of each of the first plate-shaped reinforcement ribs are respectively connected to the two first reinforcement end edge plates, and the multiple first plate-shaped reinforcement ribs are evenly spaced in the width direction of the bridge expansion joint cover plate.

7. The bridge expansion joint cover according to claim 1, characterized in that: The plurality of first plate-shaped reinforcing ribs are parallel to each other.

8. The bridge expansion joint cover according to claim 1, characterized in that: The plurality of first plate-shaped reinforcing ribs are evenly spaced and arranged in a curved plate shape.

9. The bridge expansion joint cover according to claim 1, characterized in that: The plurality of first plate-shaped reinforcing ribs are parallel to each other and have an angle of 45° to 90° with the first reinforcing end edge plate.

10. The bridge expansion joint cover according to claim 1, characterized in that: The plurality of first plate-shaped reinforcing ribs are parallel to each other and have an angle of 60° to 90° with the first reinforcing end edge plate.

11. The bridge expansion joint cover according to claim 1, characterized in that: Each of the first plate-shaped reinforcing ribs is orthogonal to the first reinforcing end edge plate.

12. The bridge expansion joint cover according to claim 1, characterized in that: The length of the plate body is set to 800mm to 1200mm, and the width is set to 800mm to 1200mm.

13. The bridge expansion joint cover according to claim 1, characterized in that: The width of the plate body is set to 1000 mm, and the length is selected from: 1160 mm, 1080 mm, 1000 mm, or 920 mm.

14. The bridge expansion joint cover according to claim 1, characterized in that: The wall thickness of each of the first plate-shaped reinforcement ribs is 14 mm to 16 mm, and the centerline spacing of the first plate-shaped reinforcement ribs is set to 54 mm-57 mm.

15. The bridge expansion joint cover according to claim 1, characterized in that: The wall thickness of each of the first plate-shaped reinforcement ribs is 19 mm to 26 mm, and the centerline spacing of the first plate-shaped reinforcement ribs is set to 75 mm-80 mm.

16. The bridge expansion joint cover according to claim 1, characterized in that: The thickness of the plate body is 4 mm to 6 mm.

17. The bridge expansion joint cover according to claim 1, characterized in that: The first reinforcing end edge plate has a thickness of 4 mm to 15 mm.

18. The bridge expansion joint cover plate according to claim 1, characterized in that: The total amount of glass fibers contained in the fiber-reinforced composite material accounts for 40-60% of the weight of the base material, wherein the continuous glass fibers account for 75%-85% of the total glass fibers.

19. The bridge expansion joint cover according to claim 1, characterized in that: Continuous glass fibers are also arranged in the board body, and the arrangement direction of the continuous glass fibers arranged in the board body crosses that of the continuous glass fibers in the first plate-shaped reinforcing ribs.

20. The bridge expansion joint cover plate according to claim 1, characterized in that: The laying direction of the continuous glass fibers in the first plate-shaped reinforcement ribs is consistent with the length direction of the first plate-shaped reinforcement ribs.

21. The bridge expansion joint cover plate according to claim 2, characterized in that: The laying direction of the continuous glass fibers in the two first reinforcing end edge plates is consistent with the width direction of the bridge expansion joint cover plate.

22. The bridge expansion joint cover according to claim 1, characterized in that: It further includes a plurality of second plate-shaped reinforcing ribs protruding from the first surface, wherein the second plate-shaped reinforcing ribs are arranged to intersect with the plurality of first plate-shaped reinforcing ribs.

23. The bridge expansion joint cover according to claim 1 or claim 2, characterized in that: In the reinforced configuration area, the continuous glass fibers account for 40% to 60% of the base material by weight.

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