Long-service-life light-maintenance joint-crossing comb plate type bridge expansion device
By using the comb-tooth simply supported and cross-slit structure and all-steel drainage tank at both sides of the movable ends in the bridge expansion device, the problems of comb-tooth plate falling off and vertical deformation in traditional devices are solved, and the effects of high load-bearing capacity, long life and low noise are achieved.
Patent Information
- Application Number
- CN202421848382.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-01
AI Technical Summary
Traditional bridge expansion devices have problems such as comb plate falling off, easy to damage, poor driving comfort, short service life and inability to meet the vertical deformation requirements of bridges.
The structure is adopted with movable ends on both sides and comb teeth are simply supported and span joints on both sides. Combining stainless steel pads and drainage tanks with all-steel structures, the stable fixation and effective drainage of comb teeth are achieved.
It improves the bearing capacity, extends the service life, reduces noise, avoids the fall of the comb plate and premature aging damage, and meets the demand for vertical deformation of the bridge.
Smart Images
Figure CN222847198U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge expansion devices, in particular to a long-life, easy-maintenance, cross-gap comb-tooth plate type bridge expansion device. Background Art
[0002] Bridge expansion devices refer to expansion devices installed between the two ends of the bridge, between the beam end and the abutment, or at the hinged position of the bridge to meet the requirements of bridge deck deformation. Bridge expansion devices are an important part of the bridge, and the performance of the expansion device directly affects the safety of driving and the smoothness of the bridge road.
[0003] Modular telescopic devices have problems such as sudden breakage of steel sections, aging of rubber strips, siltation, loud noise, and difficulty in installation. The modular type has the advantage of a smaller installation slot width and is suitable for more bridge types.
[0004] The comb-tooth plate type telescopic device has problems such as loose bolts, comb teeth lifting and falling off, and the need for two installations. In addition, the slot width is large and some bridge types are not suitable for it. The comb-tooth plate type has the advantages of smooth driving and low noise.
[0005] Although the traditional steel modular bridge expansion device has a good expansion range, in actual use, due to its own structural defects, gaps must be left between the steel sections to maintain expansion, which causes large vibrations when vehicles pass by, and there are problems such as easy damage, poor driving comfort, and short service life. The rubber plate of the comb plate bottom plate of the traditional comb-tooth bridge expansion device is prone to deformation when vehicles pass by, causing garbage to invade the comb plate bottom plate, causing the comb plate to warp, the anchor bolts to bend under force, and ultimately lead to premature failure. In addition, the traditional comb-tooth bridge expansion device cannot meet the vertical deformation requirements of the bridge. When the beam body turns corners due to the sinking and warping, the traditional comb plate will tilt up with the corner of the beam end. After the vehicle runs over it, the comb plate will break and the anchor bolts will be pulled off. Furthermore, the anchoring structure of traditional bridge expansion devices is mostly installed in the form of planted bolts. When the device is subjected to impact during use, the anchoring structure is easily loosened or sheared, causing the comb plate to fall off, resulting in the end bulging upward and forming a height difference between the end and the surrounding bridge deck. The flatness of the bridge deck deteriorates, making it unsuitable for vehicle driving, and the noise increases accordingly.
[0006] In view of the above problems, a long-life, low-maintenance, cross-gap comb-tooth plate bridge expansion device is proposed. Utility Model Content
[0007] The utility model aims to provide a long-life, easy-maintenance, cross-gap comb-tooth plate type bridge expansion and contraction device, which solves the problem of comb-tooth plate falling off in the background technology.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-life, light-maintenance, cross-seam comb-tooth plate type bridge expansion and contraction device, comprising a first bridge body and a second bridge body, one side of the top of the first bridge body and the second bridge body is fixedly connected with concrete, one side of the top of the concrete on one side is fixedly connected with a first comb-tooth plate, and one side of the top of the concrete on the other side is fixedly connected with a second comb-tooth plate, the bottoms of the first comb-tooth plate and the second comb-tooth plate are both fixedly connected with stainless steel pads, the bottom of the stainless steel pad on one side is fixedly connected with a first concrete formwork, and the bottom of the stainless steel pad on the other side is fixedly connected with a second concrete formwork, one side of the concrete on one side is penetrated and fixedly connected with a second anchor bar, one side of the concrete on the other side is penetrated and fixedly connected with the first anchor bar, one side of the first concrete formwork is fixedly connected with a water retaining groove at the bottom, and one side of the second concrete formwork is fixedly connected with a drainage groove at the bottom.
[0009] As a further description of the above technical solution: embedded steel bars are passed through and fixedly connected in the middle of the top side of the first bridge body and the second bridge body.
[0010] As a further description of the above technical solution: An angle iron is passed through and fixedly connected to one side of the bottom of the concrete, and the angle iron is fixedly connected to the first bridge body and the second bridge body respectively.
[0011] As a further description of the above technical solution: a rubber rod is fixedly connected to one side of the bottom of the angle iron, and a sealing tape is fixedly connected between the two rubber rods.
[0012] As a further description of the above technical solution: one end of the second anchor bar is fixedly connected to a second anchor plate, and the second anchor plate is fixedly connected to the first concrete formwork.
[0013] As a further description of the above technical solution: one end of the first anchor bar is fixedly connected to the first anchor plate, and the first anchor plate is fixedly connected to the second concrete formwork.
[0014] As a further description of the above technical solution: the water retaining groove and the drainage groove are both fixedly connected to the concrete.
[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0016] 1. The utility model provides a long-life, light-maintenance span-slot comb-tooth plate bridge expansion device, which firstly creatively adopts a span-slot structure with movable ends on both sides and comb-tooth simply supported spans on both sides, while having the respective advantages of the tooth simply supported riding-slot type and the span-slot type, while doubling the bearing capacity, retaining the ability of the comb-tooth simply supported form to adapt to the elastic deformation of vertical displacement.
[0017] 2. The utility model provides a long-life, low-maintenance, cross-seam comb-tooth plate type bridge expansion and contraction device, which has the advantages of smooth and low noise driving. The load-bearing plate adopts a comb-tooth plate type. When the bridge is expanded and contracted, the second comb-tooth plate slides on the stainless steel pad. Compared with the modular type, it has the advantages of smooth and low noise driving. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional diagram of the utility model;
[0019] Figure 2 It is a cross-sectional view of the utility model;
[0020] Figure 3 It is a concrete schematic diagram of the utility model;
[0021] Figure 4 It is a top view of the utility model;
[0022] Figure 5 It is an exploded view of the utility model.
[0023] Legend:
[0024] 1. The first bridge body; 2. The second bridge body; 3. The first comb plate; 4. The second comb plate; 5. Embedded steel bars; 6. The first anchor bar; 7. The first anchor plate; 8. The second anchor plate; 9. The first concrete formwork; 10. The second concrete formwork; 11. The stainless steel pad; 12. The water retaining trough; 13. The drainage trough; 14. The angle iron; 15. The rubber rod; 16. The sealing tape; 17. The second anchor bar; 18. Concrete. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.
[0027] Combination Figure 1-5The utility model discloses a long-life, light-maintenance, cross-seam comb-tooth plate bridge expansion and contraction device, comprising a first bridge body 1 and a second bridge body 2, one side of the top of the first bridge body 1 and the second bridge body 2 is fixedly connected with concrete 18, one side of the top of the concrete 18 on one side is fixedly connected with a first comb-tooth plate 3, and one side of the top of the concrete 18 on the other side is fixedly connected with a second comb-tooth plate 4, the bottoms of the first comb-tooth plate 3 and the second comb-tooth plate 4 are both fixedly connected with a stainless steel pad 11, the bottom of the stainless steel pad 11 on one side is fixedly connected with a first concrete formwork 9, and the bottom of the stainless steel pad 11 on the other side is fixedly connected with a second concrete formwork 10, one side of the concrete 18 on one side is penetrated and fixedly connected with a second anchor bar 17, one side of the concrete 18 on the other side is penetrated and fixedly connected with a first anchor bar 6, one side of the first concrete formwork 9 is fixedly connected with a water retaining groove 12, and one side of the second concrete formwork 10 is fixedly connected with a drainage groove 13;
[0028] The mud and water fall into the drainage ditch 13 and are discharged laterally into the bottom side of the transverse slope of the bridge, and then discharged out of the bridge or connected to the downpipe. There is no problem of mud and sand accumulation in the traditional telescopic device, and rubber products such as rubber waterstop and rubber supporting elements are abandoned. There is no problem of rubber aging. The all-steel structure is creatively adopted, and the steel plate is used as the drainage ditch 13. The shape of the drainage ditch 13 can separate water and sand, so that the water can be smoothly discharged out of the bridge along the transverse slope. The sand can be regularly inspected and cleaned once a year or several years. The two sides are both movable ends and the two sides are comb-tooth simply supported spans. While doubling the bearing capacity, the comb-tooth simply supported form retains the ability of the comb-tooth simply supported form to adapt to the elastic deformation of vertical displacement, and also avoids the problem of the comb teeth tilting and falling off, or even sudden breakage, caused by excessive force on the comb teeth.
[0029] The first bridge body 1 and the second bridge body 2 are both penetrated and fixedly connected with embedded steel bars 5 in the middle of the top side, and the angle irons 14 are penetrated and fixedly connected with the bottom side of the concrete 18, and the angle irons 14 are respectively fixedly connected to the first bridge body 1 and the second bridge body 2, and the bottom side of the angle irons 14 are both fixedly connected with rubber rods 15, and a sealing tape 16 is fixedly connected between the two rubber rods 15, one end of the second anchor bar 17 is fixedly connected with the second anchor plate 8, and the second anchor plate 8 is fixedly connected to the first concrete formwork 9, one end of the first anchor bar 6 is fixedly connected with the first anchor plate 7, and the first anchor plate 7 is fixedly connected to the second concrete formwork 10, and the water retaining groove 12 and the drainage groove 13 are both fixedly connected to the concrete 18;
[0030] The position of the drainage ditch 13 minimizes the cantilever length of the overall structure formed by the telescopic device and reinforced concrete, and reduces the stress of each component, thereby ensuring the stability and durability of the structure. The angle iron 14, the rubber rod 15 below and the sealing tape 16, and the detachable and replaceable rubber strip are not necessary. In terms of installation, the drainage ditch 13 is used instead of the formwork, and the sliding plate, pad, formwork and even the steel bars are integrated and placed in the predetermined position of the groove as a whole, and concrete can be poured. This avoids the problem that the comb plate type needs to be installed twice and the modular type needs to install the rubber waterstop after pouring the concrete.
[0031] Working principle: By taking the advantages of smooth and low noise driving of the comb-tooth plate type bridge expansion and contraction device, the load-bearing plate adopts a comb-tooth plate type. When the bridge is expanded and contracted, the second comb-tooth plate 4 slides on the stainless steel pad 41. Compared with the modular type, it has the advantages of smooth and low noise driving. Mud and water fall into the drainage trough 13 and are discharged laterally into the bottom side of the cross slope of the bridge, discharged outside the bridge or connected to the downpipe. There is no problem of mud and sand accumulation in the traditional expansion and contraction device. The angle iron 14, the rubber rod 15 and the sealing tape 16 below, the detachable and replaceable rubber strips can be discarded, and rubber products such as rubber waterstops and rubber supporting elements are discarded. There is no problem of rubber aging. The all-steel structure is creatively adopted, and the steel plate is used as the drainage trough 13. The shape of the drainage trough 13 can separate water and sand, so that the water can be smoothly discharged out of the bridge along the cross slope, and the sand can be regularly inspected and cleaned once a year or several years.
[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A long-life, light-maintenance, cross-gap comb-tooth plate bridge expansion and contraction device, comprising a first bridge body (1) and a second bridge body (2), characterized in that: Concrete (18) is fixedly connected to one side of the top of the first bridge body (1) and the second bridge body (2); a first comb plate (3) is fixedly connected to the top of one side of the concrete (18) on one side; a second comb plate (4) is fixedly connected to the top of one side of the concrete (18) on the other side; a stainless steel pad (11) is fixedly connected to the bottom of the first comb plate (3) and the second comb plate (4); a first concrete form (9) is fixedly connected to the bottom of the stainless steel pad (11) on one side; a second anchor bar (17) is passed through and fixedly connected to one side of the concrete (18) on one side; a first anchor bar (6) is passed through and fixedly connected to one side of the concrete (18) on the other side; a water retaining groove (12) is fixedly connected to the bottom of one side of the first concrete form (9); a drainage groove (13) is fixedly connected to the bottom of one side of the second concrete form (10).
2. According to claim 1, a long-life, easy-maintenance, cross-gap comb-tooth plate bridge expansion and contraction device, characterized in that: Embedded steel bars (5) are passed through and fixedly connected to the middle of the top side of the first bridge body (1) and the second bridge body (2).
3. The long-life, easy-maintenance, cross-gap comb-tooth plate bridge expansion and contraction device according to claim 1 is characterized by: An angle iron (14) is passed through and fixedly connected to one side of the bottom of the concrete (18), and the angle iron (14) is fixedly connected to the first bridge body (1) and the second bridge body (2) respectively.
4. The long-life, easy-maintenance, cross-gap comb-tooth plate bridge expansion device according to claim 3 is characterized by: A rubber rod (15) is fixedly connected to one side of the bottom of each angle iron (14), and a sealing tape (16) is fixedly connected between two rubber rods (15).
5. The long-life, easy-maintenance, cross-gap comb-tooth plate bridge expansion and contraction device according to claim 1 is characterized by: One end of the second anchor bar (17) is fixedly connected to a second anchor plate (8), and the second anchor plate (8) is fixedly connected to the first concrete formwork (9).
6. The long-life, easy-maintenance, cross-gap comb-tooth plate bridge expansion and contraction device according to claim 1 is characterized by: One end of each of the first anchor bars (6) is fixedly connected to a first anchor plate (7), and the first anchor plate (7) is fixedly connected to a second concrete formwork (10).
7. The long-life, easy-maintenance, cross-gap comb-tooth plate bridge expansion and contraction device according to claim 1 is characterized by: The water retaining groove (12) and the drainage groove (13) are both fixedly connected to the concrete (18).