Modular bridge expansion device
By designing rotating and sliding joint structures for the bearing bearings in modular bridge expansion joints, the problem of bearing bearing detachment was solved, improving the stability and service life of the device and ensuring driving safety and comfort.
Patent Information
- Application Number
- CN202423168677.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The pressure bearings of traditional modular bridge expansion joints are prone to detachment during operation, affecting service life and traffic safety.
Design a modular bridge expansion joint, wherein the pressure bearing is composed of a positioning seat, a spherical sliding plate, an intermediate support plate and a flat sliding plate, forming a rotating pair and a sliding pair structure. The positioning seat is welded and fixed to the displacement box. The spherical sliding plate and the flat sliding plate are flexible plates to adapt to angular displacement and longitudinal expansion and contraction.
It improves the stability of the pressure bearing, reduces the occurrence of detachment, extends the service life of the device, and enhances driving comfort and safety.
Smart Images
Figure CN223723595U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the expansion joint technical field of bridge engineering, especially a modular bridge expansion device. BACKGROUND
[0002] Bridge engineering is affected by vehicle load, bridge material and temperature, and causes bridge contraction and expansion deformation. Expansion device is one of the important functional components of bridge engineering. Bridge expansion device refers to the expansion device set between two beam ends, beam end and abutment or hinge position of bridge to meet the requirements of bridge deck deformation. Bridge expansion device is an important part of bridge. The performance of expansion device directly affects the safety of driving and the smoothness of bridge road. Modular expansion device is a kind of highway bridge expansion device and an indispensable structure in bridge expansion device. The structure of current bridge expansion device is composed of displacement box, supporting beam, middle beam steel, side beam steel, water stop, distribution spring, pressure bearing support, compression support and supporting hanger. Modular expansion device is a main type of bridge expansion device, which has the characteristics of driving safety, long service life and convenient maintenance, and is widely used in highway bridges. However, with the increasing scale, flow and tonnage of traffic vehicles, the damage of expansion device occurs from time to time. The traditional pressure bearing support is placed in the displacement box and limited by compression support and limit pin. In the operation process, it is easy to fall off, which is a typical damage of modular expansion device. SUMMARY
[0003] The utility model solves the technical problem in the prior art, and provides a modular bridge expansion device which can avoid the falling off of pressure bearing support and is more reliable in use.
[0004] The utility model adopts the technical scheme that a modular bridge expansion device comprises a displacement box, the two ends of the displacement box are fixed at a first beam end and a second beam end respectively, a supporting beam is installed in the displacement box, a compression support is installed between the supporting beam and the inner top of the displacement box, and a pressure bearing support is installed between the supporting beam and the inner bottom of the displacement box, characterized in that the pressure bearing support comprises a positioning seat, a spherical sliding plate, an intermediate support plate and a plane sliding plate which are sequentially arranged from bottom to top, the bottom of the positioning seat is fixed to the inner bottom of the displacement box, the spherical sliding plate is clamped between the positioning seat and the intermediate support plate, and the plane sliding plate is clamped between the intermediate support plate and the supporting beam.
[0005] In order to make the pressure bearing support have a rotating pair structure, the upper surface and the lower surface of the spherical sliding plate are spherical surfaces, the top of the positioning seat is provided with a groove for embedding the spherical sliding plate, the groove is in close contact with the lower surface of the spherical sliding plate, and the upper surface of the spherical sliding plate is in close contact with the lower surface of the intermediate support plate. In this way, the pressure bearing support forms a spherical support, which can adapt to the angular displacement on the one hand, and the positioning seat can be welded and fixed with the displacement box, and is not easy to fall off during operation.
[0006] In order to make the pressure bearing support have a sliding pair structure, the upper surface of the intermediate support plate is provided with a sliding groove, and the planar sliding plate is embedded in the sliding groove. In this way, the pressure bearing support can adapt to the longitudinal expansion and contraction.
[0007] Further preferably, a backing plate is further included, which is clamped between the planar sliding plate and the supporting cross beam.
[0008] Further preferably, the intermediate support plate is a steel plate, and the spherical sliding plate and the planar sliding plate are flexible plates.
[0009] The pressure bearing support can be fixed on the displacement box through various structures, and preferably, the pressure bearing support is fixed on the displacement box through a limiting pin.
[0010] In order to make the expansion device have a water stopping function, the displacement box and the supporting cross beam are provided with a water stopping device above.
[0011] The water stopping device can have various structures, and preferably, the water stopping device includes a first section steel, a second section steel, a third section steel, a first water stopping belt and a second water stopping belt, the first section steel is fixed on the left top of the displacement box, the second section steel is fixed on the right top of the displacement box, the third section steel is fixed on the middle top of the supporting cross beam, the first water stopping belt is arranged between the first section steel and the second section steel, and the second water stopping belt is arranged between the second section steel and the third section steel.
[0012] In order to ensure the comfort of driving, the upper surfaces of the first section steel, the second section steel and the third section steel are flush with the bridge deck.
[0013] In order to fix the displacement box on the beam body, the left and right sides of the displacement box extend outwardly and are provided with connecting pieces, pre-embedded steel bars are fixed in the mounting slots of the first beam end and the second beam end, and the connecting pieces are welded and fixed on the pre-embedded steel bars.
[0014] Compared with the prior art, the modulus type bridge expansion joint has the advantages that the compression support is installed between the supporting cross beam and the inner top of the displacement box, the pressure bearing support is installed between the supporting cross beam and the inner bottom of the displacement box, the pressure bearing support comprises, from bottom to top, a positioning seat, a spherical sliding plate, an intermediate support plate and a plane sliding plate, so that the pressure bearing support simultaneously has the rotation function and the sliding function, the rotation pair is adapted to the rotation displacement, the sliding pair is adapted to the longitudinal expansion and contraction, the performance of the expansion joint is improved, the pressure bearing support is not prone to falling off during the use of the expansion joint, the maintenance and replacement frequency of the pressure bearing support is reduced, the damage of the expansion joint caused by the falling off of the pressure bearing support is reduced, and the service life of the expansion joint is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a schematic view of the installation structure of the bridge expansion joint of the utility model embodiment.
[0016] Figure 2 It is Figure 1 A-A section view of the bridge expansion joint installation structure shown in the figure.
[0017] Figure 3 It is a schematic view of the structure of the bridge expansion joint of the utility model embodiment.
[0018] Figure 4 It is Figure 3 An enlarged schematic view of the A part. DETAILED DESCRIPTION
[0019] The utility model will be further described in detail in combination with the embodiment of the accompanying drawings.
[0020] As Figures 1 to 4 shown, the modulus type bridge expansion joint of the embodiment comprises displacement boxes 1, and the displacement boxes 1 are arranged at intervals along the bridge width direction. The left and right sides of the displacement box 1 extend outwardly and have connecting pieces 8, the first beam end portion 101 is provided with a mounting slot, the second beam end portion 102 is provided with a mounting slot, embedded steel bars 9 are fixed in the mounting slots, and the connecting pieces 8 are welded and fixed on the embedded steel bars 9.
[0021] The support beam 2 is arranged along the length direction of the bridge. The compression support 3 is arranged between the support beam and the inner top of the displacement box 1, and is fixed to the displacement box 1 by the limiting pin 6. The bearing support 4 is arranged between the support beam and the inner bottom of the displacement box 1. The bearing support 4 in the embodiment comprises, from bottom to top, a positioning seat 41, a spherical sliding plate 42, an intermediate support plate 43 and a planar sliding plate 44. The bottom of the positioning seat 41 is welded and fixed to the inner bottom of the displacement box 1. The spherical sliding plate 42 is clamped between the positioning seat 41 and the intermediate support plate 43. The planar sliding plate 44 is clamped between the intermediate support plate 43 and the support beam. The gusset plate 5 is clamped between the planar sliding plate 44 and the support beam 2. The intermediate support plate 43 in the embodiment is a steel plate, and the spherical sliding plate 42 and the planar sliding plate 44 are flexible plates.
[0022] The upper surface and the lower surface of the spherical sliding plate 42 are spherical surfaces. The top of the positioning seat 41 is provided with a groove for embedding the spherical sliding plate 42. The lower surface of the spherical sliding plate 42 is in close contact with the groove, and the upper surface of the spherical sliding plate 42 is in close contact with the lower surface of the intermediate support plate 43, thereby forming a rotating pair. The upper surface of the intermediate support plate 43 is provided with a sliding groove, and the planar sliding plate 44 is embedded in the sliding groove, thereby forming a sliding pair. After the above structure is adopted, the bearing support 4 has both rotating function and sliding function. The rotating pair is adapted to angular displacement, and the sliding pair is adapted to longitudinal expansion and contraction, thereby improving the performance of the expansion and contraction device. Moreover, the positioning seat 41 is welded and fixed to the displacement box 1, and the bearing support 4 is not easy to fall off during operation, thereby reducing the frequency of maintenance and replacement of the bearing support 4, reducing the damage of the expansion and contraction device caused by the falling off of the bearing support 4, and improving the service life of the expansion and contraction device.
[0023] In the embodiment, the water stopping device 7 is arranged above the displacement box 1 and the support beam 2. Specifically, the water stopping device 7 comprises a first section steel 71, a second section steel 72, a third section steel 73, a first water stopping belt 74 and a second water stopping belt 75. The first section steel 71 is fixed to the left top of the displacement box 1. The second section steel 72 is fixed to the right top of the displacement box 1. The third section steel 73 is fixed to the middle top of the support beam 2. The first water stopping belt 74 is arranged between the first section steel 71 and the second section steel 72. The second water stopping belt 75 is arranged between the second section steel 72 and the third section steel 73. After the water stopping device 7 is installed, the upper surfaces of the first section steel 71, the second section steel 72 and the third section steel 73 are flush with the bridge pavement 10, thereby ensuring the driving comfort.
[0024] After the expansion and contraction device is installed, the concrete 11 is poured in the installation slots of the first beam end portion 101 and the second beam end portion 102. The upper surface of the concrete 11 is flush with the upper surfaces of the first section steel 71, the second section steel 72, the third section steel 73 and the bridge pavement 10, thereby improving the driving comfort.
Claims
1. A displacement box (1) for a bridge expansion joint, the displacement box (1) having first and second ends (101, 102) fixed to first and second bridge ends respectively, the displacement box (1) having a support beam (2) mounted therein, the support beam (2) having a compression bearing (3) mounted between the support beam (2) and the inner top of the displacement box (1), the support beam (2) having a pressure bearing (4) mounted between the support beam (2) and the inner bottom of the displacement box (1), characterised in that: The pressure bearing support (4) comprises a positioning seat (41), a spherical sliding plate (42), an intermediate support plate (43) and a plane sliding plate (44) arranged in sequence from bottom to top, the bottom of the positioning seat (41) is fixed to the inner bottom of the displacement box (1), the spherical sliding plate (42) is clamped between the positioning seat (41) and the intermediate support plate (43), and the plane sliding plate (44) is clamped between the intermediate support plate (43) and the support beam.
2. The modular bridge expansion joint of claim 1, wherein: The upper surface and the lower surface of the spherical sliding plate (42) are spherical surfaces, the top of the positioning seat (41) is provided with a groove for embedding the spherical sliding plate (42), the groove is in close contact with the lower surface of the spherical sliding plate (42), and the upper surface of the spherical sliding plate (42) is in close contact with the lower surface of the intermediate support plate (43).
3. The modular bridge expansion joint of claim 2, wherein: The upper surface of the intermediate support plate (43) is provided with a sliding groove, and the plane sliding plate (44) is embedded in the sliding groove.
4. The modular bridge expansion joint of claim 1, wherein: A backing plate (5) is further included, and the backing plate (5) is clamped between the plane sliding plate (44) and the support beam (2).
5. The modular bridge expansion joint of claim 1, wherein: The intermediate support plate (43) is a steel plate, and the spherical sliding plate (42) and the plane sliding plate (44) are flexible plates.
6. The modular bridge expansion joint of claim 1, wherein: The compression bearing support (3) is fixed to the displacement box (1) through a limiting pin (6).
7. The modular bridge expansion joint of claim 1, wherein: A water stopping device (7) is installed above the displacement box (1) and the support beam (2).
8. The modular bridge expansion joint of claim 7, wherein: The water stopping device (7) comprises a first section steel (71), a second section steel (72), a third section steel (73), a first water stopping belt (74) and a second water stopping belt (75), the first section steel (71) is fixed to the left top of the displacement box (1), the second section steel (72) is fixed to the right top of the displacement box (1), the third section steel (73) is fixed to the middle top of the support beam (2), the first water stopping belt (74) is arranged between the first section steel (71) and the second section steel (72), and the second water stopping belt (75) is arranged between the second section steel (72) and the third section steel (73).
9. The modular bridge expansion joint of claim 8, wherein: The upper surfaces of the first section steel (71), the second section steel (72) and the third section steel (73) are flush with the bridge pavement (10).
10. The modular bridge expansion joint of claim 1, wherein: The displacement box (1) is outwardly extended on the left and right sides, embedded steel bars (9) are fixed in the mounting slots of the first beam end (101) and the second beam end (102), and the connecting pieces (8) are welded and fixed on the embedded steel bars (9).