Laminated bridge expansion device and bridge assembly thereof

Abstract

The utility model relates to a laminated bridge expansion device and a bridge assembly thereof, the laminated bridge expansion device comprises a movable end assembly and a fixed end assembly, the movable end assembly is arranged on a first bridge, the movable end assembly comprises a rib plate assembly and movable end toothed plates arranged on the rib plate assembly, and a first toothed plate gap is formed between the movable end toothed plates; the fixed end assembly is arranged on the second bridge and comprises bearing concrete and fixed end toothed plates arranged on the bearing concrete, and a second toothed plate gap is formed between the fixed end toothed plates; wherein the rib plate assembly is in lap joint between the bearing concrete and the fixed end toothed plate, the movable end toothed plate is inserted into the second toothed plate gap, the fixed end toothed plate is inserted into the first toothed plate gap, and the top end of the movable end toothed plate and the top end of the fixed end toothed plate are located on the same horizontal plane. The height difference between the movable end assembly and the fixed end assembly is eliminated, it can be guaranteed that the rib plate assemblies are cooperatively stressed, and the running stability of a vehicle is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of bridge expansion devices, and in particular to a laminated bridge expansion device and a bridge assembly thereof. Background Art

[0002] Steel-ribbed expansion joints are a newly developed type of expansion joint with numerous advantages, including coordinated force distribution and steel savings. However, this coordinated force distribution requires the addition of a steel plate at the top to connect the ribs together, resulting in a height difference on either side of the expansion joint. To ensure smooth vehicle operation, this height difference must be eliminated or its impact reduced until the vertical acceleration during vehicle passage meets human comfort standards. While existing technologies can eliminate this height difference, they are complex, difficult to process, and costly to manufacture. Utility Model Content

[0003] The present application provides a laminated bridge expansion device and a bridge assembly thereof, which can solve the problems in the related art of complex production process, difficult processing and high cost of devices for eliminating the height difference on both sides of the expansion joint.

[0004] In the first aspect, an embodiment of the present application provides a laminated bridge expansion device, which includes: a movable end assembly and a fixed end assembly, wherein the movable end assembly is arranged on a first bridge, the movable end assembly includes a rib plate assembly and a movable end tooth plate arranged on the rib plate assembly, and a first tooth plate gap is arranged between the movable end tooth plates; the fixed end assembly is arranged on a second bridge, the fixed end assembly includes supporting concrete and a fixed end tooth plate arranged on the supporting concrete, and a second tooth plate gap is arranged between the fixed end tooth plates; wherein the rib plate assembly is overlapped between the supporting concrete and the fixed end tooth plate, the movable end tooth plate is inserted into the second tooth plate gap, the fixed end tooth plate is inserted into the first tooth plate gap, and the top end of the movable end tooth plate and the top end of the fixed end tooth plate are in the same horizontal plane.

[0005] In some embodiments, the movable end assembly is connected to the first bridge via a load-measuring support.

[0006] In some embodiments, the force measuring support includes: a base, a lower connecting plate, a first elastic body, an upper connecting plate and a pressure measuring piece, the base is used to be connected to the first bridge; the lower connecting plate is arranged on the base; the first elastic body is arranged on the lower connecting plate; the upper connecting plate is connected to the movable end assembly, and the upper connecting plate is arranged on the first elastic body, the upper connecting plate and the first elastic body are pressed on the lower connecting plate by support bolts and nuts, and a spherical washer is arranged between the nut and the upper connecting plate; the pressure measuring piece is arranged at the top of the upper connecting plate.

[0007] In some embodiments, the force measuring support further includes: a plane sliding pair and a side baffle, wherein the plane sliding pair is arranged between the lower connecting plate and the base; the side baffle is arranged on the base and is located on both sides of the plane sliding pair, and is used to limit the plane sliding pair from sliding along the bridge direction.

[0008] In some embodiments, a movable end vibration damping pad is provided between the rib plate assembly and the movable end tooth plate, and the rib plate assembly, the movable end vibration damping pad and the movable end tooth plate are fixed by a first bolt.

[0009] In some embodiments, the rib assembly includes: a plurality of rib bodies, a top plate, a plurality of racks and a movable end baffle, wherein the plurality of rib bodies are spaced apart along the transverse bridge direction; the top plate is disposed between the top ends of the plurality of rib bodies; one end of the plurality of racks is spaced apart along the transverse bridge direction on one side of the top plate, and the other end is disposed between the fixed end tooth plate and the supporting concrete, and overlapped on the supporting concrete, the top and bottom ends of the racks respectively form sliding pairs with the fixed end tooth plate and the supporting concrete; the movable end baffle is disposed on the top plate.

[0010] In some embodiments, the movable end tooth plate includes: multiple movable end plate bodies and a movable end bottom plate, the multiple movable end plate bodies are arranged at intervals along the transverse bridge direction, and the movable end plate bodies are inserted into the second tooth plate gap, and the first tooth plate gap is formed between two adjacent movable end plate bodies, and the movable end plate body presses the fixed end tooth plate; shear nails are arranged on the movable end bottom plate to connect with the movable end plate body.

[0011] In some embodiments, the fixed end tooth plate includes: a fixed end plate body and a fixed end bottom plate, and a second tooth plate gap is formed between two adjacent fixed end plate bodies; the fixed end bottom plate is arranged at the bottom end of the fixed end plate body and is connected to the fixed end plate body through a second bolt, and the fixed end bottom plate is also connected to the supporting concrete through a second bolt, and the fixed end bottom plate is pressed on the top end of the movable end tooth plate.

[0012] In some embodiments, a fixed end vibration damping pad is provided between the supporting concrete and the fixed end tooth plate.

[0013] In some embodiments, the bridge expansion and contraction device further includes: a second elastic body and a transverse elastic limiting device, the second elastic body and the transverse elastic limiting device are provided on the movable end assembly, and the second elastic body and the transverse elastic limiting device are provided between the movable end assembly and the first bridge.

[0014] In a second aspect, an embodiment of the present application provides a bridge assembly, which includes the laminated bridge expansion device as described above.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0016] An embodiment of the present application provides a laminated bridge expansion device and a bridge assembly thereof, wherein a movable end tooth plate is arranged on the rib plate assembly of the movable end assembly, and a fixed end tooth plate is arranged on the supporting concrete of the fixed end assembly, and the top end of the movable end tooth plate and the top end of the fixed end tooth plate are placed in the same horizontal plane, thereby eliminating the height difference between the movable end assembly and the fixed end assembly, ensuring coordinated force on the rib plate assembly, and ensuring the smooth driving of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present application (first perspective);

[0019] Figure 2 A schematic diagram of the overall structure provided by an embodiment of the present application (second perspective);

[0020] Figure 3 A schematic diagram of the active end components provided in an embodiment of the present application;

[0021] Figure 4 for Figure 3 A partial enlarged schematic diagram in the middle;

[0022] Figure 5 A schematic diagram of a fixed end assembly provided in an embodiment of the present application;

[0023] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0024] Figure 7 Schematic diagram of the movable end component and the fixed end component provided in the embodiment of the present application;

[0025] Figure 8 for Figure 7 Schematic diagram of the cross section at DD;

[0026] Figure 9 A schematic diagram of a movable end tooth plate provided in an embodiment of the present application;

[0027] Figure 10 Figure 9 A partial enlarged schematic diagram of point B in the middle;

[0028] Figure 11 Schematic diagram of two telescopic device modules provided in an embodiment of the present application;

[0029] Figure 12 for Figure 11 Schematic diagram of the cross section at AA;

[0030] Figure 13 A schematic diagram of a force measuring support provided in an embodiment of the present application;

[0031] Figure 14 Schematic diagram of the rib assembly provided in an embodiment of the present application.

[0032] In the figure: 1, movable end assembly; 10, rib plate assembly; 100, rack; 101, rib plate body; 102, top plate; 11, movable end vibration damping pad; 12, first bolt; 13, movable end tooth plate; 130, movable end plate body; 131, movable end bottom plate; 132, shear pin; 14, movable end baffle; 15, T-shaped piece;

[0033] 2. Fixed end assembly; 20. Supporting concrete; 21. Fixed end tooth plate; 210. Fixed end plate body; 211. Fixed end bottom plate; 22. Second bolt; 23. Fixed end vibration damping pad;

[0034] 3. Force measuring support; 30. First elastic body; 31. Upper connecting plate; 32. Lower connecting plate; 33. Support bolt; 34. Spherical washer; 35. Nut; 36. Side baffle; 37. Plane sliding pair; 38. Base;

[0035] 4. Transverse elastic limit device; 5. Steel pipe; 6. Second elastic body; 7. First bridge; 8. Second bridge. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] The embodiment of the present application provides a laminated bridge expansion device and a bridge assembly thereof, which can solve the problems in the related art of complex production process, difficult processing and high cost of the device for eliminating the height difference on both sides of the expansion joint.

[0038] An embodiment of the present application provides a laminated bridge expansion device and a bridge assembly thereof, which includes: a movable end component 1 and a fixed end component 2, the movable end component 1 is arranged on the first bridge 7, the movable end component 1 includes a rib plate component 10 and a movable end tooth plate 13 arranged on the rib plate component 10, and a first tooth plate gap is arranged between the movable end tooth plates 13; the fixed end component 2 is arranged on the second bridge 8, the fixed end component 2 includes a supporting concrete 20 and a fixed end tooth plate 21 arranged on the supporting concrete 20, and a second tooth plate gap is arranged between the fixed end tooth plates 21; wherein, the rib plate component 10 is overlapped between the supporting concrete 20 and the fixed end tooth plate 21, the movable end tooth plate 13 is inserted into the second tooth plate gap, the fixed end tooth plate 21 is inserted into the first tooth plate gap, and the top end of the movable end tooth plate 13 and the top end of the fixed end tooth plate 21 are in the same horizontal plane.

[0039] In the present application, a movable end tooth plate 13 is provided on the rib plate assembly 10 of the movable end assembly 1, and a fixed end tooth plate 21 is provided on the supporting concrete 20 of the fixed end assembly 2, and the top end of the movable end tooth plate 13 and the top end of the fixed end tooth plate 21 are made to be in the same horizontal plane, so that the height difference between the movable end assembly 1 and the fixed end assembly 2 can be eliminated, and the rib plate assembly 10 can be ensured to be subjected to coordinated force, thereby ensuring the stability of the vehicle driving.

[0040] Based on the above embodiment, in this embodiment, a movable end vibration damping pad 11 is provided between the rib assembly 10 and the movable end tooth plate 13 , and the rib assembly 10 , the movable end vibration damping pad 11 and the movable end tooth plate 13 are fixed by a first bolt 12 .

[0041] Therefore, if Figure 4 As shown, the movable end assembly 1 comprises a lower rib assembly 10, a middle movable end vibration damping pad 11, and an upper movable end tooth plate 13. The movable end vibration damping pad 11 is a polymer vibration damping pad. Countersunk bolt holes are provided in the movable end tooth plate 13, and the movable end tooth plate 13 is secured to the rib assembly 10 via a first bolt 12. The first bolt 12 applies a preload force that pre-compresses the polymer vibration damping pad. The preload force of the first bolt 12 is set to be greater than the wheel load, ensuring that the polymer vibration damping pad remains compressed when a vehicle passes, preventing the first bolt 12 from loosening.

[0042] The rib assembly 10 comprises: multiple rib bodies 101, a top plate 102, multiple racks 100, and a movable end stop 14. The multiple rib bodies 101 are spaced apart along the transverse bridge direction; the top plate 102 is disposed between the top ends of the multiple rib bodies 101; multiple racks 100 are spaced apart along the transverse bridge direction on one side of the top plate 102, and the other ends are disposed between the fixed end tooth plate 21 and the supporting concrete 20, and overlap the supporting concrete 20. The top and bottom ends of the racks 100 form sliding pairs with the fixed end tooth plate 21 and the supporting concrete 20, respectively; and the movable end stop 14 is disposed on the top plate 102. This structural arrangement ensures that the rib assembly 10 is subjected to load as a whole, with the load-bearing and telescopic functions separated, resulting in minimal structural interference and improved safety.

[0043] Specifically, multiple rib bodies 101 are spaced apart in the transverse direction of the bridge, and each rib body 101 is arranged in the longitudinal direction of the bridge. A top plate 102 connects the multiple rib bodies 101 into a whole, ensuring that the multiple rib bodies 101 are subjected to coordinated force. Multiple racks 100 extend from the front end of the top plate 102 and overlap the supporting concrete 20 in the fixed end assembly 2.

[0044] It should be noted that during the pouring of the supporting concrete 20, tooth gaps are reserved. The number of tooth gaps is the same as the number of rib bodies 101, and the depth and width of the tooth gaps are respectively greater than the height and width of the rib bodies 101. This structural arrangement ensures that the rib assembly 10 is not obstructed by the supporting concrete 20 when the device is extended or retracted. The rack 100 overlaps between the tooth gaps of the supporting concrete 20 and covers the tooth gaps.

[0045] The top plate 102 on the upper part of the rib assembly 10 is made of a stainless steel composite steel plate; in order to form a sliding friction pair between the supporting concrete 20 and the rack 100, and a sliding friction pair between the rack 100 and the bottom end of the fixed end tooth plate 21, a lubricating layer, such as a MoS2 coating, can be sprayed on the top surface of the supporting concrete 20 and the bottom surface of the fixed end tooth plate 21; or a wear-resistant material, such as PTFE, can be provided on the top surface of the supporting concrete 20 and the bottom surface of the fixed end tooth plate 21.

[0046] In addition, movable end baffles 14 are fixed to both ends of the top plate 102 along the transverse direction of the bridge. The length of the movable end baffles 14 is the same as that of the rib plate body 101, and the height of the movable end baffles 14 is lower than that of the movable end tooth plates 13. Generally, two modules are set for each lane, and one module includes a movable end component 1 and a fixed end component 2. The overall modular design is used, and the movable end tooth plates 13, fixed end tooth plates 21 and supporting concrete 20 are modularly cast. The mold can be used multiple times, with low production costs and easy quality control. A T-shaped piece 15 is set between the two modules. One side of the T-shaped piece 15 is fixed to the movable end baffle 14 with countersunk screws, and the other side is freely overlapped on the movable end baffle 14, such as Figure 12As shown, after the T-shaped piece 15 is installed, its upper end surface is at the same level as the movable end tooth plate 13, so as to ensure that when the bridge is displaced, the two modules of the telescopic device can slide relative to each other, and when the vehicle changes lanes or drives between the telescopic device modules under special circumstances, it can pass smoothly.

[0047] Furthermore, after the telescopic device is installed, the end gaps between the movable end baffles 14 on the two modules are sealed with elastic caulking agent, and the rack 100 is overlapped between the teeth of the supporting concrete 20, and the teeth gaps are covered, so that there is no through-slit in the vertical direction of the telescopic device. When it rains heavily, most of the rainwater is discharged along the road surface to the drain pipes on both sides of the bridge, and a small amount of leaked rainwater is caught by the lower rubber waterstop and discharged to the drain pipes on both sides, which has a good double rainproof effect.

[0048] Among them, the movable end tooth plate 13 includes: multiple movable end plate bodies 130 and a movable end bottom plate 131. The multiple movable end plate bodies 130 are arranged at intervals along the transverse bridge direction, and the movable end plate bodies 130 are inserted into the second tooth plate gap. A first tooth plate gap is formed between two adjacent movable end plate bodies 130. The movable end plate body 130 presses the fixed end tooth plate 21; a shear nail 132 is provided on the movable end bottom plate 131, and is connected to the movable end plate body 130 through the shear nail 132. Among them, the movable end plate body 130 is cast with concrete, the movable end bottom plate 131 is a steel plate, shear nails 132 are welded on the movable end bottom plate 131, and then the movable end plate body 130 is cast on the movable end bottom plate 131, so that the movable end plate body 130, the movable end bottom plate 131 and the shear nails 132 are connected into a whole; when the movable end tooth plate 13 is cast, the top surface of the movable end plate body 130 adopts a patterned steel plate as a bottom mold, and the anti-slip effect is good after forming.

[0049] For details, see Figure 4 and Figure 8 As shown, the width of the movable end bottom plate 131 is smaller than that of the movable end plate body 130. The fixed end tooth plate 21 includes: a fixed end plate body 210 and a fixed end bottom plate 211. A second tooth plate gap is formed between two adjacent fixed end plate bodies 210. The fixed end bottom plate 211 is set at the bottom end of the fixed end plate body 210 and is connected to the fixed end plate body 210 by a second bolt 22. The fixed end plate body 210 is made of UHPC.

[0050] Since the movable end plate body 130 presses the fixed end tooth plate 21, after the movable end tooth plate 13 and the fixed end tooth plate 21 are inserted into each other, the fixed end plate body 210 is located between the two movable end plate bodies 130, and the fixed end bottom plate 211 is located between the two movable end bottom plates 131. In this embodiment, the width of the fixed end bottom plate 211 is greater than the width of the fixed end plate body 210, so the movable end plate body 130 presses the fixed end bottom plate 211, or it can be said that the fixed end bottom plate 211 is pressed against the bottom end of the movable end plate body 130 in the movable end tooth plate 13. It should be noted that a certain gap needs to be left between the adjacent movable end tooth plates 13 and fixed end tooth plates 21 to ensure normal expansion and contraction; further, since the movable end bottom plate 131 is provided with shear nails 132 connected to the movable end plate body 130, and the fixed end bottom plate 211 is connected to the fixed end plate body 210 by the second bolt 22, the movable end plate body 130 can just press the fixed end bottom plate 211 after being pre-tightened by the bolts, and then the movable end tooth plate 13 can press the fixed end tooth plate 21, thereby preventing the fixed end tooth plate 21 from abnormal displacement and reducing the vibration of the movable end tooth plate 13 and the fixed end tooth plate 21 when the vehicle passes.

[0051] Furthermore, it can be seen from the above that the fixed end assembly 2 is composed of the lower supporting concrete 20 and the upper fixed end tooth plate 21, as shown in FIG. Figure 5 As shown, the supporting concrete 20 of the lower layer and the fixed end tooth plate 21 of the upper layer are separated by the rack 100 extending from the front end of the rib assembly 10.

[0052] To improve the stability of the fixed-end tooth plate 21, the fixed-end base plate 211 in the fixed-end tooth plate 21 is also connected to the supporting concrete 20 via a second bolt 22. Specifically, a countersunk bolt hole is provided at the rear end of the fixed-end tooth plate 21. That is, countersunk bolt holes are provided in the fixed-end plate 210 and the fixed-end base plate 211. A sleeve is embedded in the supporting concrete 20, and the fixed-end plate 210 and the fixed-end base plate 211 are fixed to the sleeve in the supporting concrete 20 via the second bolt 22. A fixed-end vibration-damping pad 23 is provided between the fixed-end tooth plate 21 and the sleeve. This polymer vibration-damping pad 23 is also spaced apart and disposed between the two racks 100. The height of the fixed-end vibration-damping pad 23 is greater than the gap between the lower supporting concrete 20 and the upper fixed-end tooth plate 21, ensuring that the fixed-end vibration-damping pad 23 is appropriately compressed after the second bolt 22 is pre-tightened.

[0053] In addition, when the fixed end tooth plate 21 is cast, the top surface of the fixed end tooth plate 21 adopts a patterned steel plate as a bottom mold, which has a good anti-slip effect after molding.

[0054] On the basis of the above embodiment, in this embodiment, the movable end assembly 1 is connected to the first bridge 7 via a force measuring support 3 .

[0055] Specifically, such as Figure 13 As shown, the force measuring support 3 includes: a base 38, a lower connecting plate 32, a first elastic body 30, an upper connecting plate 31 and a pressure measuring piece, the base 38 is used to connect with the first bridge 7; the lower connecting plate 32 is arranged on the base 38, the first elastic body 30 is arranged on the lower connecting plate 32, and the lower part of the first elastic body 30 is vulcanized and bonded to the lower connecting plate 32; the upper connecting plate 31 is connected to the movable end assembly 1, the upper connecting plate 31 is arranged on the first elastic body 30, and the upper part of the first elastic body 30 is bonded to the upper connecting plate The upper connecting plate 31 is vulcanized and bonded; the upper connecting plate 31 and the first elastomer 30 are pressed onto the lower connecting plate 32 by the support bolts 33 and the nuts 35, and a pre-tightening force is applied to the first elastomer 30. A spherical washer 34 is arranged between the nut 35 and the upper connecting plate 31; wherein, the pressure measuring piece can be a force probe or a pressure ring. When the pressure measuring piece is a force probe, the force probe is arranged at the top of the upper connecting plate 31; when the pressure measuring piece is a pressure ring, the pressure ring is arranged between the spherical washer 34 and the upper connecting plate 31.

[0056] The base 38 is fixed to the embedded plate of the first bridge 7, and the upper connecting plate 31 is fixed to the rib body 101 in the rib assembly 10. The upper connecting plate 31 is vulcanized and bonded to the first elastomer 30. After the nut 35 is tightened, the first elastomer 30 is compressed, and the pre-compression force is greater than the wheel load force. During force measurement, the pressure measuring piece is placed at the end of the support bolt 33. By testing the compression force of the support bolt 33 before and after the wheel load is applied, the wheel load is obtained through monitoring and calculation. Therefore, the force measuring support 3 can monitor the vehicle wheel load in real time. The wheel load is monitored by the change in the axial force of the pre-tightened bolt, avoiding the impact of the wheel load on the sensor and the influence of the eccentric load. The spherical washer 34 can adapt to the rotation of the force measuring support 3 caused by the rotation of the bridge, ensuring that the support bolt 33 and the nut 35 are always in close contact with the first elastomer 30 and the upper connecting plate 31.

[0057] Furthermore, the force measuring support 3 also includes: a plane sliding pair 37 and a side baffle 36, the lower connecting plate 32 is arranged at the bottom end of the first elastic body 30; the plane sliding pair 37 is arranged between the lower connecting plate 32 and the base 38; the side baffle 36 is arranged on the base 38, and is located on both sides of the plane sliding pair 37, and is used to limit the plane sliding pair 37 from sliding along the bridge direction.

[0058] That is, a planar sliding pair 37 is further provided between the lower connecting plate 32 and the base 38. The planar sliding pair 37 comprises a polytetrafluoroethylene plate fixed to the lower connecting plate 32 or a lubricating coating applied to the bottom end of the lower connecting plate 32. The planar sliding pair 37 also comprises a stainless steel plate welded to the bottom plate. When the polytetrafluoroethylene plate is fixed to the lower connecting plate 32, the polytetrafluoroethylene plate and the stainless steel plate form the planar sliding pair 37. When the lubricating coating is applied to the bottom end of the lower connecting plate 32, the lubricating coating and the stainless steel plate form the planar sliding pair 37.

[0059] It should be noted that, preferably, during actual manufacture of the force-measuring support 3 in this embodiment, the lower connecting plate 32, the first elastic body 30, and the upper connecting plate 31 are connected and fixed by vulcanization bonding. Alternatively, vulcanized steel plates may be provided on the upper and lower surfaces of the first elastic body 30, the vulcanized steel plates being vulcanized and bonded to the first elastic body 30, and then bolted to the lower connecting plate 32 and the upper connecting plate 31, respectively.

[0060] In this embodiment, two side baffles 36 are provided, and the plane sliding pair 37 and the lower connecting plate 32 are located between the two side baffles 36. The lower connecting plate 32 is limited by the two side baffles 36 to prevent the movable end assembly 1 from sliding along the bridge direction on the first bridge 7 when vehicles pass or the beam body is displaced; the plane sliding pair 37 ensures that the telescopic device and the bridge can adapt to a certain lateral deformation to meet the displacement of the beam body.

[0061] On the basis of the above embodiment, in this embodiment, the bridge expansion and contraction device further includes a second elastic body 6 and a transverse elastic limiting device 4 .

[0062] Specifically, the movable end assembly 1 is provided with a second elastic body 6 and a transverse elastic limiting device 4 , and the second elastic body 6 and the transverse elastic limiting device 4 are arranged between the movable end assembly 1 and the first bridge 7 .

[0063] Among them, one side of the movable end component 1 is connected to the first bridge 7 through the force measuring support 3, and the other side is overlapped with the fixed end component 2. A certain gap is reserved between the end face of the movable end component 1 and the first bridge 7 to fill the second elastomer 6, and lateral elastic limit devices 4 are provided on both sides of the movable end component 1.

[0064] The two ends of the transverse elastic limiting device 4 are respectively connected to the first bridge 7 and the movable end assembly 1, and can be deformed along the transverse direction of the bridge. During installation, the transverse elastic limiting device 4 is preset with a certain compression amount to ensure that the telescopic device can be reset after transverse displacement. Among them, the transverse elastic limiting device 4 can be a rubber bearing, a polyurethane bearing, a steel spring, etc.

[0065] Based on the above embodiment, in this embodiment, steel pipes 5 are pre-buried in the second bridge 8 or road surface. The number and spacing of the steel pipes 5 correspond to the racks 100 at the front end of the rib assembly 10. The cavity size in the steel pipe 5 is larger than the rack size. The cross-sectional centers of the steel pipe 5 and the rack 100 coincide with each other. The length of the steel pipe 5 is larger than the designed expansion and contraction of the bridge. The purpose of this arrangement is that when the expansion and contraction of the bridge are different, the rack 100 will pass through the fixed end assembly 2 away from the end of the bridge expansion joint after the expansion and contraction device expands and contracts, and extend into the second bridge 8 or road surface. Since the road surface of the second bridge 8 is solid concrete or asphalt, it will hinder the extension of the rack 100. Therefore, hollow steel pipes 5 are pre-buried in the second bridge 8 or road surface. The cavity size in the steel pipe 5 is larger than the size of the rack 100. In this way, the rack 100 can be inserted into the hollow steel pipe 5 when it expands and contracts, so as to adapt to the expansion and contraction displacement of the rack 100 with the beam body.

[0066] In a second aspect, an embodiment of the present application provides a bridge assembly, which includes the laminated bridge expansion device provided by any of the above embodiments of the present application.

[0067] In the present application, a movable end tooth plate 13 is provided on the rib plate assembly 10 of the movable end assembly 1, and a fixed end tooth plate 21 is provided on the supporting concrete 20 of the fixed end assembly 2, and the top end of the movable end tooth plate 13 and the top end of the fixed end tooth plate 21 are made to be in the same horizontal plane, so that the height difference between the movable end assembly 1 and the fixed end assembly 2 can be eliminated, and the rib plate assembly 10 can be ensured to be subjected to coordinated force, thereby ensuring the stability of the vehicle driving.

[0068] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this 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 this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0069] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0070] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A laminated bridge expansion device, characterized in that: It includes: A movable end assembly (1), the movable end assembly (1) being arranged on a first bridge (7), the movable end assembly (1) comprising a rib plate assembly (10) and a movable end tooth plate (13) arranged on the rib plate assembly (10), a first tooth plate gap being arranged between the movable end tooth plates (13); A fixed end assembly (2), the fixed end assembly (2) being arranged on a second bridge (8), the fixed end assembly (2) comprising supporting concrete (20) and fixed end tooth plates (21) arranged on the supporting concrete (20), a second tooth plate gap being arranged between the fixed end tooth plates (21); The rib plate assembly (10) is overlapped between the supporting concrete (20) and the fixed end tooth plate (21), the movable end tooth plate (13) is inserted into the second tooth plate gap, and the fixed end tooth plate (21) is inserted into the first tooth plate gap. The top end of the movable end tooth plate (13) and the top end of the fixed end tooth plate (21) are in the same horizontal plane.

2. The laminated bridge expansion device according to claim 1, characterized in that: The movable end assembly (1) is connected to the first bridge (7) via a force-measuring support (3).

3. The laminated bridge expansion device according to claim 2, characterized in that: The force measuring support (3) comprises: a base (38), the base (38) being used to connect with the first bridge (7); a lower connecting plate (32), wherein the lower connecting plate (32) is disposed on the base (38); a first elastic body (30), the first elastic body (30) being arranged on the lower connecting plate (32); An upper connecting plate (31), the upper connecting plate (31) is connected to the movable end assembly (1), and the upper connecting plate (31) is arranged on the first elastic body (30), the upper connecting plate (31) and the first elastic body (30) are pressed onto the lower connecting plate (32) through support bolts (33) and nuts (35), and a spherical washer (34) is arranged between the nuts (35) and the upper connecting plate (31); A pressure measuring piece is arranged on the top end of the upper connecting plate (31).

4. The laminated bridge expansion device according to claim 3, characterized in that: The force measuring support (3) further comprises: A plane sliding pair (37), wherein the plane sliding pair (37) is arranged between the lower connecting plate (32) and the base (38); Side baffles (36) are arranged on the base (38) and are located on both sides of the plane sliding pair (37) and are used to limit the plane sliding pair (37) from sliding along the bridge direction.

5. The laminated bridge expansion device according to claim 1, characterized in that: A movable end vibration damping pad (11) is provided between the rib assembly (10) and the movable end tooth plate (13), and the rib assembly (10), the movable end vibration damping pad (11) and the movable end tooth plate (13) are fixed by a first bolt (12).

6. The laminated bridge expansion device according to claim 1, characterized in that: The rib assembly (10) comprises: A plurality of rib plate bodies (101), wherein the plurality of rib plate bodies (101) are spaced apart along the transverse bridge direction; A top plate (102), the top plate (102) being disposed between the top ends of the plurality of rib bodies (101); A plurality of racks (100), one end of each of the racks (100) being spaced apart along the transverse bridge direction on one side of the top plate (102), and the other end being disposed between the fixed end tooth plate (21) and the supporting concrete (20), and being overlapped on the supporting concrete (20), wherein the top and bottom ends of the racks (100) respectively form sliding pairs with the fixed end tooth plate (21) and the supporting concrete (20); A movable end baffle (14) is provided on the top plate (102).

7. The laminated bridge expansion device according to claim 1, characterized in that: The movable end tooth plate (13) comprises: A plurality of movable end plates (130), wherein the plurality of movable end plates (130) are spaced apart along the transverse bridge direction, and the movable end plates (130) are inserted into the second tooth plate gap, and a first tooth plate gap is formed between two adjacent movable end plates (130), and the movable end plates (130) press the fixed end tooth plate (21); A movable end bottom plate (131) is provided with shear nails (132) connected to the movable end plate body (130).

8. The laminated bridge expansion device according to claim 1, characterized in that: The fixed end tooth plate (21) comprises: Fixed end plates (210), with a second tooth plate gap formed between two adjacent fixed end plates (210); A fixed end bottom plate (211) is provided at the bottom end of the fixed end plate body (210) and is connected to the fixed end plate body (210) via a second bolt (22). The fixed end bottom plate (211) is also connected to the supporting concrete (20) via a second bolt (22). The fixed end bottom plate (211) is pressed against the top end of the movable end tooth plate (13).

9. The laminated bridge expansion device according to claim 1, characterized in that: A fixed end vibration damping pad (23) is provided between the supporting concrete (20) and the fixed end tooth plate (21); the bridge expansion and contraction device further comprises: A second elastic body (6) and a transverse elastic limiting device (4); the second elastic body (6) and the transverse elastic limiting device (4) are provided on the movable end component (1); the second elastic body (6) and the transverse elastic limiting device (4) are provided between the movable end component (1) and the first bridge (7).

10. A bridge assembly, characterized in that: It includes: A laminated bridge expansion device as described in any one of claims 1 to 9.

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