Bridge expansion device and bridge

Abstract

The present invention provides a bridge expansion and contraction device and a bridge. The bridge expansion and contraction device includes a first comb plate, a second comb plate and an expansion and contraction mechanism. The first comb plate includes at least three hinged plate bodies in sequence. The plate body at one end of the first comb plate is fixedly connected to the bridge body on one side of the structural seam, and the plate body at the other end is formed with first comb teeth, and the first comb teeth are located on the bridge body on the other side of the structural seam; one end of the second comb plate is fixedly connected to the bridge body on the other side of the structural seam, and the other end is formed with second comb teeth, and the first comb teeth are movably plugged with the second comb teeth; the expansion and contraction mechanism is connected to the plate body formed with the first comb teeth, so that the plate body formed with the first comb teeth fits the corresponding bridge body. By setting at least two hinged structures, the rotation between the hinged plate bodies can well adapt to the displacement elevation difference generated by the two bridge bodies; at the same time, the expansion and contraction mechanism provides the plate body formed with the first comb teeth with a pulling force to fit the bridge body, preventing the first comb teeth from tilting up, and avoiding the tilted rack from causing hidden dangers to driving safety.

Description

Technical Field

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

[0002] In bridge engineering, bridges are prone to deformation of the beam ends due to vehicle loads, shrinkage and creep of the bridge's own materials, foundation settlement, wind loads, etc. Bridge expansion devices are generally used to handle, solve and adapt to the torsion, dislocation, settlement and other spatial activities of the bridge. However, the traditional comb-tooth plate bridge expansion device cannot meet the vertical rotation angle requirements of the bridge beam well, and the comb teeth of the traditional comb-tooth plate bridge expansion device will rise with the rotation angle of the beam end. The raised rack will bring hidden dangers to driving safety. At the same time, the comb teeth will break and the anchor will be pulled off after being rolled over by the vehicle. Summary of the invention

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

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

[0005] An embodiment of the present application provides a bridge expansion device for connecting structural joints between bridge bodies of a bridge, the bridge expansion device comprising a first comb tooth plate, a second comb tooth plate and an expansion mechanism, the first comb tooth plate comprising at least three hinged plate bodies in sequence, the plate body at one end of the first comb tooth plate is fixedly connected to the bridge body on one side of the structural joint, and the plate body at the other end is provided with first comb teeth, and the first comb teeth are located on the bridge body on the other side of the structural joint; one end of the second comb tooth plate is fixedly connected to the bridge body on the other side of the structural joint, and the other end is provided with second comb teeth, and the first comb teeth are movably plugged into the second comb teeth; the expansion mechanism is connected to the plate body formed with the first comb teeth, so that the plate body formed with the first comb teeth fits the corresponding bridge body.

[0006] Furthermore, the telescopic mechanism includes a displacement box and a crossbeam, the displacement box is located below the second comb plate, one end of the crossbeam is connected to the plate body formed with the first comb teeth, and the other end is accommodated in the displacement box and can slide in the displacement box.

[0007] Furthermore, the telescopic mechanism also includes a sliding support assembly, which is arranged between the crossbeam and the inner wall of the displacement box, and the sliding support assembly is connected to the crossbeam or the displacement box.

[0008] Furthermore, the sliding support assembly includes a clamping support and a pressure-bearing support, wherein the clamping support is arranged between the cross beam and the inner top wall of the displacement box; and the pressure-bearing support is arranged between the cross beam and the inner bottom wall of the displacement box.

[0009] Furthermore, the bridge expansion and contraction device also includes a buffer support, which is supported below the first comb plate. Both ends of the buffer support are respectively connected to the first comb plate to cover the hinges of adjacent plates. The buffer support is configured to adapt to the rotation of the plate.

[0010] 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 first comb plate; the second sub-plate is away from the first comb plate; 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 overlapped.

[0011] Further, 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.

[0012] Further, 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.

[0013] Furthermore, the plate body is divided into three sections, and the three sections of the plate body are respectively:

[0014] A fixing plate fixedly connected to the bridge body at one side of the structural joint;

[0015] A seam spanning plate, used to cover the structural seam, one end of the seam spanning plate is located on the bridge body on one side of the structural seam, 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

[0016] A plug-in plate is used to be 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 span plate away from the fixed plate, and the other end of the plug-in plate is formed with the first comb teeth.

[0017] The bridge telescopic device provided in the embodiment of the present application has a first comb plate including 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 sequence and movably extended to the bridge body on the other side of the structural seam, and the plate body can rotate around the hinge axis. By providing at least two hinged structures, the rotation between the hinged plate bodies can well adapt to the displacement elevation difference generated by the two bridge bodies; at the same time, since the telescopic mechanism is connected to the plate body formed with the first comb teeth, the telescopic mechanism provides a pulling force for the plate body formed with the first comb teeth to fit the bridge body, thereby preventing the first comb teeth from tilting up, avoiding the tilted rack from posing a hidden danger to driving safety, and at the same time, avoiding the comb teeth from breaking and the anchor damage caused by the vehicle running over the comb teeth.

[0018] A second aspect of an embodiment of the present application provides a bridge, comprising a bridge body and any one of the above-mentioned bridge expansion devices, wherein a structural joint is formed between the two bridge bodies; one end of the first comb tooth plate is fixedly connected to the bridge body on one side of the structural joint, and one end of the second comb tooth plate is fixedly connected to the bridge body on the other side of the structural joint.

[0019] Furthermore, the bridge also includes a waterproof membrane spanning the structural seam, and the waterproof membrane is located below the first comb plate.

[0020] Furthermore, at least two bridge expansion devices are arranged along the transverse direction of the bridge, and the interval between two adjacent bridge expansion devices is 2 to 5 mm.

[0021] A bridge provided in an embodiment of the present application has corresponding technical effects due to the adoption of the above-mentioned bridge expansion device. The two ends of the bridge expansion device are respectively fixedly connected to the bridge body on both sides of the structural joint, so that the bridge expansion device can be stable and reliable while adapting to and handling the deformation of the bridge, thereby ensuring both the flatness of the bridge deck and driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic top view of a bridge according to an embodiment of the present application;

[0023] Figure 2 for Figure 1 A schematic cross-sectional view along the middle line AA;

[0024] Figure 3 for Figure 1 A schematic cross-sectional view of the middle edge BB;

[0025] Figure 4 This is a schematic structural diagram of a bridge telescopic device according to an embodiment of the present application, in which the telescopic mechanism is omitted;

[0026] Figure 5 A schematic diagram of the structure of a bridge expansion and contraction device according to an embodiment of the present application; and

[0027] Figure 6 It is a schematic diagram of the force analysis of the bridge expansion device in the prior art.

[0028] Description of reference numerals:

[0029] 1. Bridge; 11. Bridge body; 111. Structural joint; 12. Bridge telescopic device; 121. First comb plate; 121'. Movable comb plate; 121a. Plate body; 1211. Fixed plate; 12111. First mounting hole; 1212. Cross-seam plate; 1213. Plug-in plate; 12131. First comb teeth; 1214. Hinge shaft; 122. Second comb plate; 1221. Second comb teeth; 1222. Second mounting hole; 123. Telescopic mechanism; 1231. Displacement box; 1232. Crossbeam; 1233. Sliding bearing assembly; 12331. Pressing bearing; 12332. Pressure bearing; 124. Buffer support; 1241. First sub-plate; 1242. Buffer plate; 1243. Second sub-plate; 13. Waterproof membrane. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present 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 the present application and should not be regarded as an improper limitation on the present application.

[0031] In the description of this application, the "upper", "lower", "vertical" directions or positional relationships are based on the attached Figure 2 The orientation or position relationship shown in the figure is based on the Figure 1 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 should not be understood as a limitation on the present application.

[0032] In bridge engineering, one end of the two comb plates of the traditional bridge expansion device is respectively anchored to a bridge body, and the comb teeth of the two comb plates away from the anchoring end are plugged into each other. When a displacement difference occurs between the two bridge bodies, the two anchored comb plates cannot adapt well to the deformation of the bridge, that is, the displacement difference between the two bridge bodies. The deformed bridge body will give the comb plate a vertical upward force. Under the action of this force, the comb teeth of the comb plate will tilt up. The upturned comb teeth cause the bridge deck to be uneven and driving is unsafe. In addition, after the displacement difference occurs between the two bridge bodies, the vehicle will roll over the comb teeth acting on the comb plate, resulting in a lever effect. When the force is greater than the tightening force of the anchor bolt, the anchor bolts away from the comb teeth will become loose, eventually leading to anchor failure.

[0033] Through the force analysis of the existing bridge expansion device, it is found that from the perspective of bridge deformation, when the bridge is flat, the traditional bridge expansion device can better adapt to the bridge deformation and provide better driving comfort. However, when the bridge has a longitudinal slope, the greater the longitudinal slope or the wider the structural gap between the bridge bodies, the poorer the adaptability of the bridge expansion device. Figure 6 Assume that before the bridge body 11 on both sides of the bridge expansion device is displaced, the beam end gap of the bridge body 11 is 100cm, the longitudinal slope is 3%, and the height difference between points A and B is 3cm. When the beam end gap is shortened to 50cm under the action of load, the height difference between points A and B is still 3cm, and the slope increases from 3% to 6%, but the slope of the movable comb plate 121' on the bridge is still 3%. In this way, the deformed beam end will give a large upward force to the comb teeth of the movable comb plate 121'. Under the action of this force, the movable comb plate 121' will be deformed, the anchor bolts will loosen, and the comb teeth will tilt.

[0034] In view of this, a bridge expansion device is provided in an embodiment of the present application for connecting the structural seams 111 between the bridge bodies 11 of the bridge 1, see Figures 1 to 3 The bridge telescopic device 12 includes a first comb plate 121, a second comb plate 122 and a telescopic mechanism 123. The first comb plate 121 includes at least three sections of plate bodies 121a that are hinged in sequence. The plate body 121a at one end of the first comb plate 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 is formed with first comb teeth 12131, and the first comb teeth 12131 are located on the bridge body 11 on the other side of the structural seam 111. One end of the second comb plate 122 is fixedly connected to the bridge body 11 on the other side of the structural seam 111, and the other end is formed with second comb teeth 1221, and the second comb teeth 1221 are plugged with the first comb teeth 12131. The telescopic mechanism 123 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 11.

[0035] The first comb tooth plate 121 of the embodiment of the present application is designed with at least three sections of plate bodies 121a hinged in sequence, that is, multiple hinge shafts 1214 are designed, such as a double-hinged first comb tooth plate 121, the plate body 121a at one end of the first comb tooth plate 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 first comb tooth plate 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 deformation of the bridge with a longitudinal slope under temperature changes, avoiding the "emptying" phenomenon of a gap between the plate body 121a of the first comb tooth plate 121 and the bridge body 11, thereby improving the performance of the fixed connection parts for installing the first comb tooth plate 121, such as the anchoring performance of the anchor bolts, and improving the impact deformation resistance of the plate body 121a of the first comb tooth plate 121.

[0036] Since the plate body 121a at one end of the first comb plate 121 is fixedly connected to the bridge body 11 on one side of the structural seam 111, and one end of the second comb plate 122 is fixedly connected to the bridge body 11 on the other side of the structural seam 111, when the beam ends of the two bridge bodies 11 are deformed due to vehicle loads, foundation settlement, etc., the fixed end of the first comb plate 121 and the fixed end of the second comb plate 122 respectively move together with the beam ends of the bridge body 11, and the at least three sections of the plate bodies 121a hinged by the first comb plate 121 will automatically adjust and rotate to adapt to the change in the beam end rotation angle and the displacement difference between the two bridge bodies 11, so as to achieve the leveling of the two bridge bodies 11. Smooth transition; the first comb teeth 12131 at the other end of the first comb tooth plate 121 and the second comb teeth 1221 at the other end of the second comb tooth plate 122 will still be plugged in, providing a continuous driving surface for the vehicle; since the telescopic mechanism 123 is connected to the plate body 121a formed with the first comb teeth 12131, the telescopic mechanism 123 provides a pulling force for the plate body 121a formed with the first comb teeth 12131 to fit the corresponding bridge body 11, thereby preventing the first comb teeth 12131 from tilting up, avoiding the hidden danger of the tilted rack to driving safety, and at the same time, avoiding the comb teeth from breaking and the anchor pulling off after the vehicle runs over the comb teeth.

[0037] Specifically, a first mounting hole 12111 is formed on the first comb tooth plate 121, which is used to fix the first comb tooth plate 121 to a bridge body 11. For example, a first mounting hole 12111 is formed on the plate body 121a at one end of the first comb tooth plate 121. A second mounting hole 1222 is formed on the second comb tooth plate 122, which is used to fix the second comb tooth plate 122 to another bridge body 11. For example, second mounting holes 1222 are formed at both ends of the second comb tooth plate 122, respectively, and the second mounting hole 1222 at one end is located on the second comb teeth 1221.

[0038] It should be noted that there is no restriction on the way in which the plate body 121a at one end of the first comb tooth plate 121 is fixedly connected to the bridge body 11 on one side of the structural seam 111, and the way in which one end of the second comb tooth plate 122 is fixedly connected to the bridge body 11 on the other side of the structural seam 111. They can be anchored to the bridge body 11 by fixing anchor bolts passing through the first mounting hole 12111 and the second mounting hole 1222 respectively. The anchoring can also be an embedded part to enhance the tolerance of the first comb tooth plate 121 and the second comb tooth plate 122 under load impact and prevent the anchoring from pulling off.

[0039] Specifically, in one embodiment, see Figure 5The telescopic mechanism 123 includes a displacement box 1231 and a crossbeam 1232. The displacement box 1231 is located below the second comb plate 122. One end of the crossbeam 1232 is connected to the plate 121a formed with the first comb teeth 12131, and the other end is accommodated in the displacement box 1231 and can slide in the displacement box 1231. One end of the crossbeam 1232 is connected to the plate 121a formed with the first comb teeth 12131, and the other end is accommodated in the displacement box 1231, so that the crossbeam 1232 provides the plate 121a formed with the first comb teeth 12131 with a tensile force to fit the bridge body 11, thereby preventing the first comb teeth 12131 from tilting and providing a continuous driving surface for the vehicle.

[0040] In one embodiment, the connection method between one end of the beam 1232 and the plate 121a having the first comb teeth 12131 is not limited. For example, the connection method between one end of the beam 1232 and the plate 121a having the first comb teeth 12131 is welding, screwing, etc.

[0041] Furthermore, in one embodiment, the telescopic mechanism 123 further includes a sliding support assembly 1233, which is disposed between the crossbeam 1232 and the inner wall of the displacement box 1231, and the sliding support assembly 1233 is connected to the crossbeam 1232 or the displacement box 1231. When the beam end of the bridge body 11 turns or a displacement difference occurs between the two bridge bodies 11, the crossbeam 1232 needs to adjust its position in the displacement box 1231 in order to provide the plate 121a formed with the first comb teeth 12131 with a tensile force to fit the bridge body 11, so as to adapt to the deformation of the beam end, and thus the sliding support assembly 1233 helps the crossbeam 1232 to slide in the displacement box 1231.

[0042] Further, in one embodiment, please continue to refer to Figure 5The sliding support assembly 1233 includes a clamping support 12331 and a pressure-bearing support 12332. The clamping support 12331 is arranged between the crossbeam 1232 and the inner top wall of the displacement box 1231, and the pressure-bearing support 12332 is arranged between the crossbeam 1232 and the inner bottom wall of the displacement box 1231. When the height of the beam end of the bridge body 11 fixedly connected to one end of the first comb plate 121 is greater than the height of the beam end of the bridge body 11 fixedly connected to one end of the second comb plate 122, the crossbeam 1232 located in the displacement box 1231 slides toward the inner top wall of the displacement box 1231, and the clamping support 12331 is clamped, which has a certain buffering effect on the telescopic crossbeam 1232 and also limits the displacement of the crossbeam 1232 in the height direction. On the contrary, when the height of the beam end of the bridge body 11 fixedly connected to one end of the first comb tooth plate 121 is smaller than the height of the beam end of the bridge body 11 fixedly connected to one end of the second comb tooth plate 122, one end of the beam 1232 in the displacement box 1231 slides toward the lower wall of the displacement box 1231. At this time, the pressure-bearing support 12332 is pressed, which also has a certain buffering effect on the telescopic beam 1232, and also limits the displacement of the beam 1232 in the height direction, so that the beam 1232 provides the plate 121a formed with the first comb teeth 12131 with a pulling force to fit the bridge body 11, thereby preventing the first comb teeth 12131 from tilting and providing a continuous driving surface for the vehicle.

[0043] Further, in one embodiment, see Figure 4 The bridge expansion device 12 also includes a buffer support 124, which is supported below the first comb plate 121. Both ends of the buffer support 124 are respectively connected to the first comb plate 121 to cover the hinges of adjacent plates 121a. The buffer support 124 is configured to adapt to the rotation of the plate 121a.

[0044] Specifically, a first mounting hole 12111 is also formed on the plate body 121a at the other end of the first comb plate 121. Both ends of the buffer support member 124 are connected to the first comb plate 121 through the first mounting hole 12111 via fasteners.

[0045] When at least two sections of the plate bodies 121a hinged to the first comb plate 121 automatically adjust and rotate to adapt to the change in the angle of the beam end and the displacement elevation difference generated by the two bridge bodies 11, when a vehicle rolls over the first comb plate 121, the buffer support 124 is arranged below the first comb plate 121, which ensures the overall plane rigidity of the first comb plate 121 and plays a certain buffering role. In addition, since the plates 121a are hinged, there is a risk of water leakage, dust intrusion, and garbage entering the hinged position, so the buffer support 124 also prevents dust, rainwater and garbage from entering the bridge 1, thereby preventing dust, rainwater, etc. from entering the beam body and causing rust and blockage.

[0046] Furthermore, in one embodiment, in order for the buffer support member 124 to withstand the rolling of the vehicle together with the first comb plate 121 as a whole, the buffer support member 124 includes a first sub-plate 1241, a buffer plate 1242 and a second sub-plate 1243. The first sub-plate 1241 is adjacent to the first comb plate 121, the second sub-plate 1243 is away from the first comb plate 121, and the buffer plate 1242 is located between the first sub-plate 1241 and the second sub-plate 1243. Since the first sub-plate 1241 and the second sub-plate 1243 have a certain rigidity, the overall rigidity of the first comb plate 121 can be improved. In addition, in order to avoid the first sub-plate 1241 and the second sub-plate 1243 directly contacting to generate rigid impact and cause wear, and to ensure that the first comb plate 121 is rolled over by the vehicle to play a role in buffering and vibration reduction, a buffer plate 1242 is provided between the first sub-plate 1241 and the second sub-plate 1243. The first sub-plate 1241 , the buffer plate 1242 and the second sub-plate 1243 are overlapped and can move along with the rotation of the hinged plate bodies 121 a in the first comb plate 121 .

[0047] Furthermore, in one embodiment, in order to prevent rainwater and garbage from entering the beam body and causing rust, the first sub-plate 1241 and the second sub-plate 1243 have strong toughness and can move with the rotation of the hinged plate 121a in the first comb plate 121, the first sub-plate 1241 can be a metal plate, and / or the second sub-plate 1243 can be a metal plate. In addition, the buffer plate 1242 can be a rubber plate to play a buffering and vibration reduction role.

[0048] It is understandable that the materials of the first sub-plate 1241 and the second sub-plate 1243 are not limited, and can be stainless steel, aluminum or other metal materials with strong toughness. Furthermore, the surface of the metal plate is treated with anti-corrosion to meet the requirements of toughness and corrosion resistance. In addition, the material of the buffer plate 1242 is not limited, and can be a rubber plate, soft rubber or other plastics, as long as it has a buffering effect.

[0049] Furthermore, in one embodiment, the thickness of the first sub-plate 1241 is smaller than the thickness of the plate body 121a, and the thickness of the second sub-plate 1243 is smaller than the thickness of the plate body 121a, ensuring that after the first sub-plate 1241, the buffer plate 1242 and the second sub-plate 1243 are overlapped, the whole can flexibly rotate following the plate body 121a hinged to the first comb plate 121.

[0050] Further, in one embodiment, see Figure 2The plate body 121a is divided into three sections, and the three sections of the plate body 121a are respectively a fixed plate 1211, a cross-seam plate 1212 and a plug-in plate 1213. The fixed plate 1211 is fixedly connected to the bridge body 11 on one side of the structural seam 111, 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, and 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 one end of the cross-seam plate 1212 away from the fixed plate 1211, and the other end of the plug-in plate 1213 is formed with a first comb tooth 12131.

[0051] The fixed plate 1211 is used to be fixedly connected to the abutment 11 on one side of the structural seam 111 of the bridge 1, so the fixed plate 1211 moves synchronously with the abutment 11, and the cross-seam plate 1212 and the plug-in plate 1213 rotate around the hinge shaft 1214. Since at least two hinge shafts 1214 are provided, it can well adapt to the height displacement difference generated by the two bridge bodies 11, thereby providing a continuous traffic bearing surface for driving. The fixed plate 1211 avoids the phenomenon of fixed connecting parts being affected by impact, such as loosening of the anchoring structure, which eventually leads to the detachment of the anchoring structure, and also prevents the first comb tooth 12131 from tilting.

[0052] In one embodiment, the number of the plates 121a is not limited, and is determined according to the width of the structural seam 111 between the bridge bodies 11 and the deformation of the bridge 1. When the width of the structural seam 111 is small or the deformation of the bridge 1 is small, the plate 121a can be three sections, and the plate 121a is respectively a fixed plate 1211, a seam spanning plate 1212 and a plug-in plate 1213. When the width of the structural seam 111 is large or the deformation of the bridge 1 is large, the plate 121a can be more than three sections, and the multi-section plate 121a is hinged in sequence to provide a more continuous and smooth road surface for vehicles to pass.

[0053] The second aspect of the embodiment of the present application provides a bridge. Figure 3 , including 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; one end of a first comb plate 121 is fixedly connected to the bridge body 11 on one side of the structural seam 111, and one end of a second comb plate 122 is fixedly connected to the bridge body 11 on the other side of the structural seam 111.

[0054] Due to the adoption of the bridge expansion device 12 of any of the above embodiments, corresponding technical effects are achieved, and the two ends of the bridge expansion device 12 are respectively fixedly connected to the bridge body 11 on both sides of the structural joint 111, so that the bridge expansion device 12 can be stable and reliable while adapting to and handling the deformation of the bridge 1, which can ensure the flatness of the bridge deck and the safety of driving. The bridge body 11 can be a beam body or an abutment.

[0055] Further, in one embodiment, see Figure 3 The bridge 1 further includes a waterproofing membrane 13 spanning the structural seam 111, and the waterproofing membrane 13 is located below the first comb plate 121. If water leaks into the structural seam 111, the water can be discharged to both sides of the bridge 1 along the waterproofing membrane 13, so that water can be prevented from entering the structural seam 111 of the bridge 1 and damaging the structure of the bridge body 11, thereby reducing manpower and material costs.

[0056] Furthermore, at least two bridge expansion devices 12 are arranged in the transverse direction of the bridge 1, and the spacing between two adjacent bridge expansion devices 12 is 2-5 mm. The spacing between the bridge expansion devices 12 allows for sufficient space for installation, avoiding installation interference problems due to manufacturing errors, and also avoiding installation interference problems caused by deformation of the bridge expansion devices 12 due to thermal expansion or deformation of the beam ends of the bridge body 11 due to wind loads, shrinkage creep of the material itself, and the like.

[0057] It should be noted that there is no limit to the number of bridge expansion devices 12 , and the number can be determined according to the width of the bridge body 11 .

[0058] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bridge expansion device, used to connect the structural seams between bridge bodies, characterized in that: include: A first comb plate, comprising at least three plate bodies hinged in sequence, wherein the plate body at one end of the first comb plate is fixedly connected to the bridge body at one side of the structural seam, and the plate body at the other end is formed with first comb teeth, and the first comb teeth are located on the bridge body at the other side of the structural seam; A second comb plate, one end of which is fixedly connected to the bridge body at the other side of the structural seam, and the other end of which is formed with second comb teeth, and the first comb teeth are movably plugged with the second comb teeth; and a telescopic 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 corresponding bridge body; Wherein, the telescopic mechanism comprises: a displacement box, located below the second comb plate; and A crossbeam, one end of which is connected to the plate body formed with the first comb teeth, and the other end of which is accommodated in the displacement box and can slide in the displacement box.

2. The bridge expansion device according to claim 1, characterized in that: The telescopic mechanism further comprises a sliding support assembly, wherein the sliding support assembly is arranged between the cross beam and the inner wall of the displacement box, and the sliding support assembly is connected to the cross beam or the displacement box.

3. The bridge expansion device according to claim 2, characterized in that: The sliding support assembly comprises: A compression support, disposed between the crossbeam and the inner top wall of the displacement box; and A pressure bearing seat is arranged between the cross beam and the inner bottom wall of the displacement box.

4. The bridge expansion device according to any one of claims 1 to 3, characterized in that: The bridge expansion device also includes: A buffer support is supported below the first comb plate, and both ends of the buffer support are respectively connected to the first comb plate to cover the hinges of the adjacent plates. The buffer support is configured to adapt to the rotation of the plate.

5. The bridge expansion device according to claim 4, characterized in that: The buffer support member comprises: a first sub-plate, adjacent to the first comb plate; a second sub-plate, away from the first comb plate; 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 overlapped.

6. The bridge expansion device according to claim 5, 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.

7. The bridge expansion device according to claim 5, 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.

8. The bridge expansion device according to any one of claims 1 to 3, characterized in that: The plate body is divided into three sections, and the three sections of the plate body are respectively: A fixing plate fixedly connected to the bridge body at one side of the structural joint; A seam spanning plate, used to cover the structural seam, 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-in plate is used to be 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 span plate away from the fixed plate, and the other end of the plug-in plate is formed with the first comb teeth.

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

10. The bridge according to claim 9, characterized in that: The bridge further comprises a waterproof membrane spanning across the structural seam, wherein the waterproof membrane is located below the first comb plate.

11. The bridge according to claim 9, characterized in that: At least two bridge expansion devices are arranged along the transverse direction of the bridge, and the interval between two adjacent bridge expansion devices is 2 to 5 mm.

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