Comb plate structure, bridge telescopic device and bridge

Abstract

The present invention provides a comb plate structure, a bridge expansion and contraction device, and a bridge. The comb plate structure is used to bridge the structural seam between the bridge bodies. The comb plate structure includes at least three plate sections hinged in sequence. The plate at one end of the comb plate structure is fixedly connected to the bridge body on one side of the structural seam. The plate at the other end of the comb plate structure is formed with first comb teeth. The plate with the first comb teeth is movably arranged on the bridge body on the other side of the structural seam. One of the plate sections is fixedly connected to the bridge body on one side of the structural seam, and the other plate sections are hinged in sequence and movably extended to the bridge body on the other side of the structural seam. Adjacent plate sections can rotate around the hinge axis. By providing at least two hinge structures, the displacement difference between the two bridge bodies can be well adapted to avoid the first comb teeth from tilting. The comb plate structure with at least two hinges of the bridge expansion and contraction device releases the height difference and beam end angle caused by vehicle loads, foundation settlement, etc. on the two bridge bodies, ensuring a flat bridge deck.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a comb plate structure, a bridge expansion device and a bridge. Background Art

[0002] In the field of bridge technology, structural joints are designed to accommodate expansion and settlement, with bridge expansion mechanisms spanning these joints. When the bridge beam stretches and compresses due to temperature fluctuations, the comb-shaped plates in the expansion mechanism are subjected to upward force from the deformed beam, causing them to warp upward. In extreme cases, the teeth of the expansion mechanism can break after being driven over by a vehicle. Furthermore, impacts on the comb-shaped plates can cause the anchors on the ends away from the teeth to pull away. Summary of the Invention

[0003] In view of this, the embodiments of the present application hope to provide a comb-tooth plate structure, a bridge expansion device and a bridge to solve the problem of poor adaptability of existing comb-tooth bridge expansion devices.

[0004] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0005] An embodiment of the present application provides a comb plate structure for bridging the structural seam between bridge bodies of a bridge. The comb plate structure includes at least three plate sections hinged in sequence. The plate at one end of the comb plate structure is fixedly connected to the bridge body on one side of the structural seam. A first comb tooth is formed on the plate at the other end of the comb plate structure. The plate with the first comb teeth is movably arranged on the bridge body on the other side of the structural seam.

[0006] Furthermore, the comb plate structure also includes a buffer support member supported below the plate body, one end of the buffer support member is connected to the plate body at one end of the comb plate structure, and the other end of the buffer support member is connected to the plate body at the other end of the comb plate structure to cover the hinge of the adjacent plate body, and the buffer support member is configured to adapt to the rotation of the plate body.

[0007] Furthermore, the buffer support member includes a first sub-plate, a second sub-plate and a buffer plate, the first sub-plate is adjacent to the plate body, the second sub-plate is away from the plate body, the buffer plate is located between the first sub-plate and the second sub-plate, and the first sub-plate, the buffer member and the second sub-plate are arranged in a superimposed manner.

[0008] Furthermore, the first sub-plate is a metal plate, and / or the second sub-plate is a metal plate, and / or the buffer plate is a rubber plate.

[0009] Furthermore, the thickness of the first sub-plate is smaller than the thickness of the plate body, and the thickness of the second sub-plate is smaller than the thickness of the plate body.

[0010] Furthermore, after the first sub-plate, the buffer plate and the second sub-plate are stacked, both ends are anchored to the plate body respectively.

[0011] Furthermore, a first mounting hole is formed on the plate body at one end of the comb plate structure for anchoring connection with the bridge body.

[0012] Furthermore, the number of the plate body is three, and the three plate bodies are respectively:

[0013] a fixing plate fixedly connected to the bridge body on one side of the structural seam;

[0014] a seam-spanning plate, used to cover the structural seam, wherein one end of the seam-spanning plate is located on the bridge body on one side of the structural seam, and the other end is located on the bridge body on the other side of the structural seam, and one end of the seam-spanning plate is hinged to the fixing plate; and

[0015] A plug-in plate is movably arranged on the bridge body at a side of the structural seam away from the fixed plate. One end of the plug-in plate is hinged to an end of the seam-spanning plate away from the fixed plate, and the other end of the plug-in plate is formed with the first comb teeth.

[0016] A comb plate structure provided in an embodiment of the present application includes at least three hinged plate sections, one of which is fixedly connected to the bridge body on one side of the structural seam, and the other plate sections are hinged in turn and movably extended to the bridge body on the other side of the structural seam. Adjacent plate sections can rotate around the hinge axis. By setting at least two hinged structures, it can well adapt to the displacement difference generated by the two bridge bodies and avoid the first comb tooth from tilting.

[0017] A second aspect of an embodiment of the present application provides a bridge expansion device for connecting bridge bodies on both sides of a structural joint of a bridge, comprising:

[0018] In any of the above-mentioned comb plate structures, one end of the comb plate structure away from the first comb teeth is fixedly connected to the bridge body on one side of the structural seam; and

[0019] A fixed comb plate is fixedly connected to the bridge body on the other side of the structural seam, one end of the fixed comb plate is formed with second comb teeth, and the first comb teeth are plugged into the second comb teeth.

[0020] Furthermore, a second mounting hole is formed on each of the second comb teeth for anchoring connection with the bridge body.

[0021] A bridge expansion device provided in an embodiment of the present application has the above-mentioned corresponding technical effects due to the adoption of the above-mentioned comb plate structure. At the same time, through the insertion of the comb plate structure and the fixed comb plate, it can well adapt to the displacement difference generated by the two bridge bodies and ensure the smoothness of the two bridge bodies.

[0022] A third aspect of the embodiments of the present application provides a bridge, including:

[0023] bridge bodies, with a structural seam formed between the two bridge bodies; and

[0024] In any of the above-mentioned bridge expansion and contraction devices, one end of the comb plate structure is fixedly connected to the bridge body on one side of the structural seam, and the fixed comb plate is fixedly connected to the bridge body on the other side of the structural seam.

[0025] A bridge provided by an embodiment of the present application has a bridge expansion device in which a comb plate structure with at least two hinges is fixedly connected to one bridge body, and a fixed comb plate is fixedly connected to the other bridge body. The bridge expansion device automatically adapts to the height displacement difference generated by the two bridge bodies, releases the height difference and beam end rotation angle caused by vehicle loads, foundation settlement, etc. on the two bridge bodies, ensures the flatness of the bridge deck, prevents the comb structure from warping, and avoids damage to the anchor structure under external loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a bridge expansion device according to an embodiment of the present application;

[0027] Figure 2 This is a schematic structural diagram of a bridge expansion and contraction device according to another embodiment of the present application;

[0028] Figure 3 for Figure 2 Schematic top view of

[0029] Figure 4 A schematic longitudinal cross-sectional view of a bridge according to an embodiment of the present application; and

[0030] Figure 5 This is a schematic longitudinal cross-sectional view of a bridge according to another embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Bridge; 11. Bridge body; 111. Structural joint; 12. Bridge expansion device; 121. Comb plate structure; 121a. Plate body; 1211. Fixed plate; 12111. First mounting hole; 1212. Cross-seam plate; 1213. Plug-in plate; 12131. First comb teeth; 1214. Buffer support; 12141. First sub-plate; 12142. Buffer plate; 12143. Second sub-plate; 1215. Hinge shaft; 122. Fixed comb plate; 123. Follow-up mechanism; 1231. Displacement box; 1232. Crossbeam; 1221. Second comb teeth; 12211. Second mounting hole. DETAILED DESCRIPTION

[0033] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0034] In the description of this application, the "upper", "lower" and "vertical" directions or positional relationships are based on the attached Figure 4 Regarding the orientation or positional relationship shown, it should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] During construction and operation, bridges are subject to vehicle loads, shrinkage and creep of the bridge's own materials, foundation settlement, and wind loads, causing deformation at the bridge beam ends. Bridge expansion mechanisms, as key components of bridge structures, are designed to address these deformations and height differences between bridge structures. However, the teeth of the comb plates in traditional bridge expansion mechanisms warp as the beam stretches and compresses. This warped rack can break when driven over by vehicles, and the anchor bolts of the comb plates can bend due to the upward warping, causing the teeth to pull out of the anchors after impact.

[0036] In view of this, the present application embodiment provides a comb plate structure, please refer to Figures 1 to 3 , used to bridge the structural seam 111 between the bridge bodies 11 of the bridge 1, including at least three plate bodies 121a hinged in sequence, the plate body 121a at one end of the comb plate structure 121 is fixedly connected to the bridge body 11 on one side of the structural seam 111, and the plate body 121a at the other end of the comb plate structure 121 is formed with first comb teeth 12131, and the plate body 121a formed with the first comb teeth 12131 is movably set on the bridge body 11 on the other side of the structural seam 111.

[0037] Specifically, for example, see Figure 4 or Figure 5Along the longitudinal direction of the bridge 1, the plate 121a at the left end of the comb-tooth plate structure 121 is fixedly connected to the bridge body 11 on the left side of the structural seam 111. The plate 121a at the right end of the comb-tooth plate structure 121 is formed with first comb teeth 12131. The plate 121a with the first comb teeth 12131 is movably mounted on the bridge body 11 on the right side of the structural seam 111. It is understood that the position of the comb-tooth plate structure 121 on the bridge body 11 can be reversed along the longitudinal direction of the bridge 1. The bridge body 11 may be an abutment or a beam.

[0038] In the embodiment of the present application, the comb-tooth plate structure 121 is designed with at least three plate bodies 121a hinged in sequence, that is, it is designed as a multi-hinged comb-tooth plate structure 121, such as a double-hinged comb-tooth plate structure 121. The plate body 121a at one end of the comb-tooth plate structure 121 is fixedly connected to the bridge body 11 on one side of the structural seam 111, and the plate body 121a at the other end of the comb-tooth plate structure 121 is movably arranged on the bridge body 11 on the other side of the structural seam 111, thereby improving the deformation adaptability of the bridge expansion device 12 to the bridge 1 under temperature changes, especially for bridges 1 with longitudinal slopes, avoiding the "emptying" phenomenon of a gap between the plate body 121a of the comb-tooth plate structure 121 and the bridge body 11, thereby improving the performance of the fixed connection parts for installing the comb-tooth plate structure 121, such as the anchoring performance of the anchor bolts, and improving the impact deformation resistance of the plate body 121a of the comb-tooth plate structure 121.

[0039] In one embodiment, see Figure 1 、 Figure 3 and Figure 4 The comb plate structure 121 has three sections of plate bodies 121a, which are a fixed plate 1211, a cross-seam plate 1212, and a plug-in plate 1213. The fixed plate 1211 is used to be fixedly connected to the bridge body 11 on one side of the structural seam 111 of the bridge 1. The cross-seam plate 1212 is used to cover the structural seam 111. One end of the cross-seam plate 1212 is located on the bridge body 11 on one side of the structural seam 111, and the other end is located on the bridge body 11 on the other side of the structural seam 111. One end of the cross-seam plate 1212 is hinged to the fixed plate 1211. The plug-in plate 1213 is used to be movably arranged on the bridge body 11 on the side of the structural seam 111 away from the fixed plate 1211. One end of the plug-in plate 1213 is hinged to the end of the cross-seam plate 1212 away from the fixed plate 1211. The other end of the plug-in plate 1213 is formed with a first comb tooth 12131.

[0040] The fixed plate 1211 is used to be fixedly connected to the bridge body 11 on one side of the structural seam 111 of the bridge 1, so the fixed plate 1211 moves synchronously with the bridge body 11 on one side of the structural seam 111, and the cross-seam plate 1212 and the plug-in plate 1213 can rotate around the hinge shaft 1215. Since there are at least two hinge shafts, the cross-seam plate 1212 can smoothly transition the height displacement difference between the fixed plate 1211 and the plug-in plate 1213, and can also adapt well to the height displacement difference generated by the two bridge bodies 11. Therefore, the fixed plate 1211 avoids the loosening of fixed connecting parts such as anchoring structures caused by impact, which eventually leads to the detachment of the anchoring structure, and also prevents the first comb teeth 12131 from tilting.

[0041] In one embodiment, see Figures 1 to 2 or Figures 4 and 5 The comb plate structure 121 further includes a buffer support member 1214, which is supported below the plate body 121a, for example, below the fixed plate 1211, the cross-slit plate 1212, and the plug-in plate 1213. One end of the buffer support member 1214 is connected to the plate body 121a at one end of the comb plate structure 121, and the other end of the buffer support member 1214 is connected to the plate body 121a at the other end of the comb plate structure 121 to cover the hinge between adjacent plates 121a. The buffer support member 1214 is configured to accommodate the rotation of the plate body 121a. For example, one end of the buffer support 1214 is connected to the fixed plate 1211, and the other end is connected to the plug-in plate 1213 to cover the hinge axis 1215 between the adjacent fixed plate 1211 and the cross-seam plate 1212, and the hinge axis 1215 between the cross-seam plate 1212 and the plug-in plate 1213. The buffer support 1214 is configured to adapt to the rotation of the cross-seam plate 1212 and the plug-in plate 1213.

[0042] When there is a height difference between the two bridge bodies 11, the cross-slit plate 1212 rotates about the hinge axis 1215 between the fixed plate 1211 and the cross-slit plate 1212, and the plug-in plate 1213 rotates about the hinge axis 1215 between the cross-slit plate 1212 and the plug-in plate 1213. Therefore, a certain angle exists between the fixed plate 1211 and the cross-slit plate 1212, and between the cross-slit plate 1212 and the plug-in plate 1213. In order to ensure smooth movement between the fixed plate 1211, the cross-slit plate 1212, and the plug-in plate 1213, and to provide a certain amount of support, a buffer support 1214 is provided below the fixed plate 1211, the cross-slit plate 1212, and the plug-in plate 1213 to ensure the overall planar rigidity of the comb plate structure 121. In addition, since the cross-seam plate 1212 is hinged to the fixed plate 1211, and the plug-in plate 1213 is hinged to the cross-seam plate 1212, there is a risk of water leakage, dust intrusion, and garbage entry at the hinged position. Therefore, the buffer support 1214 prevents dust, rainwater and garbage from entering the bridge 1, thereby preventing rainwater and garbage from entering the beam body and causing rust and blockage.

[0043] In one embodiment, the buffer support member 1214 includes a first sub-plate 12141, a second sub-plate 12143 and a buffer plate 12142. The first sub-plate 12141 is adjacent to the plate body 121a, for example, adjacent to the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213. The second sub-plate 12143 is away from the plate body 121a, for example, away from the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213. The buffer plate 12142 is arranged between the first sub-plate 12141 and the second sub-plate 12143. The first sub-plate 12141, the buffer member 12142 and the second sub-plate 12143 are arranged in a superimposed manner.

[0044] To provide a certain degree of support to the hinged multiple plates 121a, for example, the fixed plate 1211, the cross-slit plate 1212, and the plug-in plate 1213, and to enhance the overall planar rigidity of the comb-tooth plate structure 121, two thin plates with a certain degree of rigidity, namely the first sub-plate 12141 and the second sub-plate 12143, are positioned beneath the fixed plate 1211, the cross-slit plate 1212, and the plug-in plate 1213. Furthermore, a buffer member is provided between the first sub-plate 12141 and the second sub-plate 12143 to prevent direct contact and wear between the first and second sub-plates 12141, 12143, thereby extending the service life of the first and second sub-plates 12141, 12143 and ensuring a certain degree of cushioning when a vehicle runs over the comb-tooth plate structure 121.

[0045] In one embodiment, the first sub-plate 12141 is a metal plate, and / or the second sub-plate 12143 is a metal plate, and / or the buffer plate 12142 is a rubber plate. The metal plates ensure that the stacked first sub-plate 12141, buffer plate 12142, and second sub-plate 12143 can rotate flexibly with the fixed plate 1211, the spanning plate 1212, and the plug plate 1213, while also preventing rainwater and debris from entering the beam. The rubber plates provide a certain cushioning effect on vehicles passing through.

[0046] It should be noted that the materials of the first and second sub-plates 12141 and 12143 are not limited; the metal plates can be stainless steel, aluminum, or other strong and tough metal materials. Furthermore, the metal plates can be treated with an anti-corrosion surface treatment to ensure both strength and corrosion resistance. The material of the buffer plate 12142 is also not limited; it can be a rubber plate, soft rubber, or other plastic, as long as it provides a cushioning effect.

[0047] Furthermore, in one embodiment, in order to enable the first sub-plate 12141, the buffer plate 12142 and the second sub-plate 12143 to rotate as a whole following the plate body 121a after being overlapped, for example, following the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213, the thickness of the first sub-plate 12141 is smaller than the thickness of the plate body 121a, for example, smaller than the thickness of the fixed plate 1211, and the thickness of the second sub-plate 12143 is smaller than the thickness of the plate body 121a, for example, smaller than the thickness of the fixed plate 1211.

[0048] Specifically, in order to ensure that each section plate body 121a is subjected to uniform force when under load, for example, to ensure that the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213 are subjected to uniform and stable force when being crushed by a vehicle, the thickness of each section plate body 121a is equal, that is, the thickness of the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213 are equal.

[0049] It can be understood that the thickness of the first sub-plate 12141 and the second sub-plate 12143 is determined according to the thickness of the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213. In order to ensure that the first sub-plate 12141, the buffer plate 12142 and the second sub-plate 12143 can rotate as a whole following the fixed plate 1211, the cross-seam plate 1212 and the plug-in plate 1213 after being superimposed, and not being too thick, the thickness of the first sub-plate 12141 or the second sub-plate 12143 is generally 0.5 to 10 mm.

[0050] Furthermore, in one embodiment, after the first sub-plate 12141, the buffer plate 12142, and the second sub-plate 12143 are superimposed, their ends are anchored to the plate body 121a. For example, the first sub-plate 12141, the buffer plate 12142, and the second sub-plate 12143 can completely cover the fixed plate 1211, the cross-seam plate 1212, and the plug-in plate 1213, and rotate with the rotation of the cross-seam plate 1212 and the plug-in plate 1213. For example, the first sub-plate 12141, the buffer plate 12142, and the second sub-plate 12143 can partially cover the fixed plate 1211, the cross-seam plate 1212, and the plug-in plate 1213, leaving some free space under the first comb teeth, and partially rotate with the rotation of the cross-seam plate 1212 and the plug-in plate 1213.

[0051] In one embodiment, see Figure 3 and Figure 4A first mounting hole 12111 is formed on the plate body 121a at one end of the comb plate structure 121, which is used for anchoring and connecting with the bridge body 11. For example, a first mounting hole 12111 is formed on the fixed plate 1211 at one end of the comb plate structure 121, which is used for anchoring and connecting with the bridge body 11. Since the cross-seam plate 1212 hinged to the fixed plate 1211 and the plug-in plate 1213 hinged to the cross-seam plate 1212 are movable parts, it is necessary to ensure that at least one of the plates is a fixed end. Since the plug-in plate 1213 has a first comb tooth 12131 at the other end, it needs to be movably plugged with the second comb tooth 1221. Therefore, the fixed plate 1211 is anchored to the bridge body 11 to ensure that the fixed plate 1211 is stable and secure and will not become loose when a vehicle runs over it.

[0052] Furthermore, a first mounting hole 12111 is also formed on the plate body 121a at the other end of the comb plate structure 121, for connection to the buffer support member 1214. For example, a first mounting hole 12111 is formed on the plug plate 1213 at the other end of the comb plate structure 121, for connection to the buffer support member 1214. Specifically, an anchor bolt can be passed through the first mounting hole 12111 on the fixing plate 1211 and one end of the buffer support member 1214 to anchor the bridge body 11, and a fastening bolt can be passed through the first mounting hole 12111 on the plug plate 1213 to fasten the other end of the buffer support member 1214.

[0053] The second aspect of the embodiment of the present application provides a bridge expansion device, see Figure 5 , used to connect the bridge body 11 on both sides of the structural seam 111 of the bridge 1, the bridge expansion device 12 includes a comb plate structure 121 and a fixed comb plate 122 of any of the above-mentioned embodiments, the comb plate structure 121 One end away from the first comb teeth 12131 is fixedly connected to the bridge body 11 on one side of the structural seam 111, the fixed comb plate 122 is fixedly connected to the bridge body 11 on the other side of the structural seam 111, and one end of the fixed comb plate 122 is formed with second comb teeth 1221, and the first comb teeth 12131 are plugged into the second comb teeth 1221.

[0054] Because the plate 121a at one end of the comb plate structure 121, such as the fixed plate 1211, is fixedly connected to the bridge body 11 on one side of the structural seam 111, and the plate 121a at one end of the comb plate structure 121, such as the fixed plug-in plate 1213, is fixedly connected to the bridge body 11 on the other side of the structural seam 11, when there is a height displacement difference between the two bridge bodies 11, the fixed plate 1211 moves synchronously with one bridge body 11, while the plug-in plate 1213 moves synchronously with the other bridge body 11. The cross-seam plate 1212 and the plug-in plate 1213 in the comb plate structure 121 automatically adjust to the height displacement difference between the two bridge bodies 11, smoothing the height displacement difference between the two bridge bodies 11. The plugging of the first comb teeth 12131 and the second comb teeth 1221 facilitates flexible and automatic adjustment of the longitudinal displacement difference between the two bridge bodies 11, effectively adapting to the displacement difference generated by the two bridge bodies 11.

[0055] In one embodiment, see Figure 2 and Figure 3 Each second comb tooth 1221 is formed with a second mounting hole 12211 for anchoring to the bridge body 11. Since the cross-slit plate 1212 hinged to the fixed plate 1211 and the plug-in plate 1213 hinged to the cross-slit plate 1212 are movable parts, they can flexibly and automatically adjust the height displacement difference between the fixed plate 1211 and the fixed comb tooth plate 122, that is, the height displacement difference between the two bridge bodies 11. Therefore, the second comb teeth 1221 can be anchored to their corresponding bridge bodies 11 through the second mounting holes 12211, ensuring that the fixed plate 1211 is stable and secure and will not loosen when a vehicle runs over it.

[0056] Furthermore, a second mounting hole 12211 is formed on one end of the fixed comb plate 122 away from the second comb teeth 1221 for connecting to the bridge body 11. By fixing both ends of the fixed comb plate 122, it is beneficial for the fixed comb plate 122 to be installed more firmly and securely.

[0057] Further, in one embodiment, see Figure 2 、 Figure 3 The bridge expansion and contraction device 12 also includes a follower mechanism 123, which is connected to the plate body 121a formed with the first comb teeth 12131, so that the plate body 121a formed with the first comb teeth 12131 fits the bridge body.

[0058] Further, in one embodiment, see Figure 2The follower mechanism 123 can be a telescopic mechanism, which includes a displacement box 1231 and a crossbeam 1232. The displacement box 1231 is located below the fixed comb plate 122. One end of the crossbeam 1232 is connected to the plate body 121a on which the first comb teeth 12131 are formed, and the other end is accommodated in the displacement box 1231 and can slide in the displacement box 1231, so that the crossbeam 1232 provides a pulling force for the plate body 121a on which the first comb teeth 12131 are formed to fit the bridge body 11, thereby preventing the first comb teeth 12131 from tilting. The follower mechanism 123 can also be other structures. For example, a waist-shaped hole is formed on the first comb tooth 12131 along the longitudinal direction. The first comb tooth 12131 is anchored to the bridge body 11 through the waist-shaped hole. The first comb tooth 12131 can move longitudinally relative to the anchor bolt, and can also make the plate body 121a with the first comb tooth 12131 fit the bridge body 11 to prevent the first comb tooth 12131 from tilting.

[0059] The third aspect of the embodiment of the present application provides a bridge. Figure 5 The bridge 1 includes a bridge body 11 and a bridge expansion device 12 of any one of the above-mentioned embodiments. A structural seam 111 is formed between the two bridge bodies 11. The plate body 121a at one end of the comb plate structure 121 is fixedly connected to the bridge body 11 on one side of the structural seam 111, and the fixed comb plate 122 is fixedly connected to the bridge body 11 on the other side of the structural seam 111.

[0060] The two bridge bodies 11 produce height displacement difference under the conditions of vehicle load, shrinkage creep of the bridge 1 material itself, foundation settlement, wind load, etc. The plate 121a at one end of the comb plate structure 121 moves synchronously with the bridge body 11 connected to one side of the structural seam 111, and the fixed comb plate 122 moves synchronously with the bridge body 11 connected to the other side of the structural seam 111. The other plates 121a of the comb plate structure 121, such as the cross-seam plate 1212 and the plug-in plate 1213, rotate around the hinge shaft 1215. The inclination angle of the plate 121a at the other end of the tooth plate structure 121, such as the cross-slit plate 1212, varies with the specific value of the height displacement difference between the two bridge bodies 11, ultimately achieving a smooth transition between each plate 121a, for example, achieving a smooth transition between the fixed plate 1211, the cross-slit plate 1212, and the plug-in plate 1213. This reduces the height difference and rotation angle caused by vehicle loads and foundation settlement between the two bridge bodies 11, ensuring a flat bridge deck and preventing the first comb teeth 12131 and the second comb teeth 1221 from tilting. In addition, the fixed plate 1211 and the fixed comb plate 122 also prevent the anchor structure from loosening due to impact, ultimately leading to anchor failure.

[0061] In one embodiment, a plurality of bridge expansion devices 12 may be transversely arranged between the structural seams 111 of the two bridge bodies 11 . The number of expansion devices 12 may be determined according to the width of the bridge body 11 , and the spacing between two adjacent expansion devices 12 may be 2 to 5 mm.

[0062] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0063] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A bridge expansion device for connecting the bridge bodies on both sides of the structural seam of the bridge, characterized in that: include: A comb plate structure for bridging a structural gap between bridge bodies of a bridge, the comb plate structure comprising at least three plate sections hinged in sequence, the plate at one end of the comb plate structure being fixedly connected to the bridge body on one side of the structural gap, the plate at the other end of the comb plate structure being formed with first comb teeth, the plate with the first comb teeth being movably disposed on the bridge body on the other side of the structural gap; The comb plate structure further includes a buffer support member supported below the plate body, one end of the buffer support member being connected to the plate body at one end of the comb plate structure, and the other end of the buffer support member being connected to the plate body at the other end of the comb plate structure to cover the hinge of adjacent plates; a fixed comb plate, fixedly connected to the bridge body on the other side of the structural seam, wherein one end of the fixed comb plate is formed with second comb teeth, and the first comb teeth are plugged into the second comb teeth; The bridge expansion and contraction device further includes a follower mechanism connected to the plate body formed with the first comb teeth, so that the plate body formed with the first comb teeth fits the bridge body; The number of the plate body is three, and the three plate bodies are respectively: a fixing plate fixedly connected to the bridge body on one side of the structural seam; a seam-spanning plate, used to cover the structural seam, wherein one end of the seam-spanning plate is located on the bridge body on one side of the structural seam, and the other end is located on the bridge body on the other side of the structural seam, and one end of the seam-spanning plate is hinged to the fixing plate; as well as A plug plate is movably disposed on the bridge body on the side of the structural seam away from the fixed plate, one end of the plug plate is hinged to the end of the cross-slit plate away from the fixed plate, and the other end of the plug plate is formed with the first comb teeth; The buffer support member is supported below the fixed plate, the cross-slit plate and the plug-in plate, and the buffer support member can rotate along with the fixed plate, the cross-slit plate and the plug-in plate.

2. The bridge expansion device according to claim 1, characterized in that: The buffer support member comprises: a first sub-plate, adjacent to the plate body; a second sub-plate, away from the plate body; and The buffer plate is located between the first sub-plate and the second sub-plate, and the first sub-plate, the buffer plate and the second sub-plate are stacked.

3. The bridge expansion device according to claim 2, characterized in that: The first sub-plate is a metal plate, and / or the second sub-plate is a metal plate, and / or the buffer plate is a rubber plate.

4. The bridge expansion device according to claim 2, characterized in that: The thickness of the first sub-plate is smaller than the thickness of the plate body, and the thickness of the second sub-plate is smaller than the thickness of the plate body.

5. The bridge expansion device according to claim 2, characterized in that: After the first sub-plate, the buffer plate and the second sub-plate are stacked, both ends are anchored and connected to the plate body respectively.

6. The bridge expansion device according to claim 1, characterized in that: A first mounting hole is formed on the plate body at one end of the comb plate structure for anchoring connection with the bridge body.

7. The bridge expansion device according to claim 1, characterized in that: A second mounting hole is formed on each of the second comb teeth for anchoring and connecting with the bridge body.

8. A bridge, characterized in that: include: A bridge body, wherein a structural seam is formed between the two bridge bodies; as well as The bridge expansion device according to any one of claims 1 to 7, wherein one end of the comb plate structure is fixedly connected to the bridge body on one side of the structural joint, and the fixed comb plate is fixedly connected to the bridge body on the other side of the structural joint.

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