Expansion joint structure and bridge
By incorporating an elastic buffer layer and rubber sheet into the bridge expansion joint structure, the problems of shortened service life and safety hazards caused by a flush top surface of the bridge expansion joint have been solved, resulting in higher deformation capacity and improved driving comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-03-27
AI Technical Summary
The top surface of existing bridge expansion joints is flush with the concrete and asphalt pavement layers, which leads to problems such as vehicle bouncing at the expansion joint location, concrete cracking, dust accumulation, and steel corrosion and breakage, shortening the service life and creating safety hazards.
An elastic buffer layer is installed on top of the expansion joint device. The top surface of the cast-in-place concrete layer is flush with the top surface of the expansion joint device. The expansion joint device, the cast-in-place concrete layer and the asphalt pavement layer are connected by a rubber plate with a thickness of 10-20mm. The elasticity and toughness of the rubber plate are used to buffer vehicle loads, resist tensile deformation and reduce impact.
It improves the bridge's expansion and contraction capacity, reduces vehicle bouncing during driving, enhances road surface smoothness and driving comfort, and extends the service life of expansion joint devices.
Smart Images
Figure CN224047894U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge construction technical field especially is related to a expansion joint structure and bridge. BACKGROUND
[0002] The top surface of the existing bridge expansion joint is flush with the top surface of the concrete and the bridge asphalt pavement layer, and under the combined action of vehicle wheel pressure, material strength and environmental factors, etc., the expansion joint position often appears bumping, expansion joint concrete rupture, expansion joint dust accumulation and expansion joint steel corrosion fracture, etc., greatly shortening the design service life of the expansion joint device, limiting the normal deformation of the bridge, and also causing a not small safety hazard to the vehicle in high-speed driving. SUMMARY
[0003] The utility model discloses a kind of expansion joint structure and bridge, to alleviate the top surface of bridge expansion joint in prior art with the top surface of concrete and bridge asphalt pavement layer flush, make the service life of expansion joint shorten, bring the problem of security risk.
[0004] To solve the above technical problems, the technical scheme provided by the utility model is as follows:
[0005] Firstly, the utility model provides an expansion joint structure, which comprises an expansion joint device, an elastic buffer layer and a cast-in-place concrete layer.
[0006] Further,
[0007] Further comprising an asphalt pavement layer, the top surface of the asphalt pavement layer is flush with the top surface of the elastic buffer layer.
[0008] Further,
[0009] The elastic buffer layer comprises a rubber plate, and the rubber plate has an integrated or segmented structure.
[0010] Further,
[0011] The rubber plate is connected to the expansion joint device, the cast-in-place concrete layer and the asphalt pavement layer by an adhesive.
[0012] Further,
[0013] The thickness of the rubber plate ranges from 10 to 20 mm.
[0014] Further,
[0015] The expansion joint device comprises a first section steel and a second section steel.
[0016] Further,
[0017] The first section steel and the second section steel are connected with a rubber strip.
[0018] Further,
[0019] The first section steel and the second section steel are respectively welded with the bridge anchoring steel bars through expansion joint anchoring steel bars.
[0020] Further,
[0021] The bridge concrete layer is arranged at the bottom of the cast-in-place concrete layer, and the bridge anchoring steel bars are arranged in the bridge concrete layer.
[0022] In the second aspect, the utility model provides a kind of bridge, including the expansion joint structure of first aspect.
[0023] The utility model at least has following beneficial effects:
[0024] The utility model provides an expansion joint structure, which comprises an expansion joint device, an elastic buffer layer and a cast-in-place concrete layer.
[0025] The elastic buffer layer is arranged on the top of the cast-in-place concrete layer, and can bear the cyclic load of vehicles, effectively resist certain tensile deformation, buffer the direct force acting on the expansion joint device, protect the expansion joint device and improve the expansion deformation capacity of the bridge.
[0026] To make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art of the present application, the drawings needed to be used in the specific embodiments or the related art description will be briefly introduced as follows. Obviously, the drawings described in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0028] Figure 1 The schematic diagram of the expansion joint structure brushing the bonding agent is provided for the embodiments of the present application.
[0029] Figure 2 The overall schematic diagram of the expansion joint structure is provided for the embodiments of the present application.
[0030] Icon:
[0031] 100-expansion joint device; 110-first shaped steel; 120-second shaped steel; 130-rubber strip; 200-elastic buffer layer; 300-cast-in-place concrete layer; 400-asphalt paving layer; 500-bonding agent; 600-expansion joint anchoring steel bar; 700-bridge concrete layer. DETAILED DESCRIPTION
[0032] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.
[0033] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0034] In the description of the present application, it should be noted that the orientations or position relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, such as no separate marking, should be understood as the basic quantities of the international system of units, or the derived quantities derived from the basic quantities by multiplication, division, differentiation or integration and other mathematical operations.
[0035] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0036] In the description of the present application, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0037] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other. Among them, Figure 1 The schematic diagram of brushing adhesive agent for the expansion joint structure provided by the embodiment of the present application is shown in the figure. Figure 2 The overall schematic diagram of the expansion joint structure provided by the embodiment of the present application is shown in the figure.
[0038] Example 1
[0039] The top surface of the existing bridge expansion joint is flush with the top surface of the concrete and the bridge asphalt pavement layer. Due to the combined action of vehicle wheel pressure, material strength and environmental factors, etc., the expansion joint often appears to jump, the expansion joint concrete is broken, the expansion joint dust is accumulated, and the expansion joint steel is corroded and broken, etc. The design service life of the expansion joint device is greatly shortened, the normal deformation of the bridge is limited, and the safety hazard of the vehicle in high-speed driving is not small.
[0040] Therefore, the embodiment of the present application provides an expansion joint structure, which comprises: an expansion joint device 100, an elastic buffer layer 200 and a cast-in-place concrete layer 300, the elastic buffer layer 200 is arranged on the top of the expansion joint device 100, the cast-in-place concrete layer 300 is arranged on the bottom of the elastic buffer layer 200, and the top surface of the cast-in-place concrete layer 300 is flush with the top surface of the expansion joint device 100.
[0041] By setting the elastic buffer layer 200 on the top of the cast-in-place concrete layer 300, the elastic buffer layer 200 can bear the vehicle cyclic load, effectively resist certain tensile deformation, buffer the direct force acting on the expansion joint device 100, protect the expansion joint device 100, and improve the expansion deformation capacity of the bridge. The expansion joint structure can relieve the faulting of the expansion joint device 100 caused by the shrinkage of the cast-in-place concrete layer 300, relieve the impact generated under the action of the vehicle, reduce the bumping phenomenon of the vehicle during driving caused by the existence of the expansion joint device 100, improve the flatness of the road surface, and improve the driving comfort.
[0042] In an optional mode of the embodiment, the expansion joint structure further comprises an asphalt pavement layer 400, and the top surface of the asphalt pavement layer 400 is at the same height as the top surface of the elastic buffer layer 200.
[0043] Please refer to Figure 1 The elastic buffer layer 200 can relieve the vehicle impact action caused by the difference in material stiffness between the asphalt pavement layer 400 and the cast-in-place concrete layer 300.
[0044] In an optional mode of the embodiment, the elastic buffer layer 200 comprises a rubber plate, and the rubber plate has an integrated or segmented structure.
[0045] Please refer to Figure 2 The elastic buffer layer 200 is an integrated or segmented special rubber plate, the special rubber plate can bear the vehicle cyclic load, can effectively resist the aging effect, and can resist certain tensile action. By using the elasticity and toughness of the rubber, the direct force acting on the expansion joint device 100 is buffered, thereby protecting the expansion joint device 100. In addition, the rubber plate and the asphalt pavement layer 400 are both flexible materials, and there is no obvious difference in stiffness, so there is no obvious feeling of driving jerk. The rubber plate can effectively isolate most dust, reduce the maintenance frequency, and improve the expansion deformation capacity of the bridge.
[0046] In an optional mode of the embodiment, the rubber plate is connected to the expansion joint device 100, the cast-in-place concrete layer 300, and the asphalt pavement layer 400 by the adhesive 500.
[0047] Please refer to Figure 1 The adhesive 500 is applied to the surface of the cast-in-place concrete layer 300 and the expansion joint device 100 and the vertical surface of the intersecting asphalt pavement layer 400. When applying the adhesive 500, it is necessary to ensure uniform application. After the adhesive 500 meets the requirements, the integrated or segmented rubber plate is laid on the adhesive 500. The adhesive 500 can effectively bond steel-rubber and concrete-rubber, and can effectively resist the repeated shearing action of the vehicle.
[0048] In an optional mode of the embodiment, the thickness of the rubber plate ranges from 10mm to 20mm.
[0049] Specifically, the thickness of the rubber plate can be any value in the range from 10mm to 20mm, such as 10mm, 15mm, 20mm, etc.
[0050] In an optional mode of the embodiment, the expansion joint device 100 comprises a first steel bar 110 and a second steel bar 120, and the first steel bar 110 and the second steel bar 120 are oppositely arranged.
[0051] Please refer to Figure 1 , the first steel bar 110 and the second steel bar 120 have a certain spacing, and the rubber strip 130 is connected between the first steel bar 110 and the second steel bar 120. After the cast-in-place concrete layer 300 is initially cured, the waterproof rubber strip 130 is installed, and attention should be paid to not polluting the rubber strip 130 when the adhesive 500 is applied.
[0052] In an optional mode of the embodiment, the first steel bar 110 and the second steel bar 120 are respectively welded and connected with the bridge anchoring steel bar through the expansion joint anchoring steel bar 600.
[0053] Please refer to Figure 2 , the expansion joint structure further comprises a bridge concrete layer 700, and the bridge concrete layer 700 is arranged at the bottom of the cast-in-place concrete layer 300, and the bridge anchoring steel bar is arranged in the bridge concrete layer 700.
[0054] The construction method of the expansion joint structure is described as follows:
[0055] After the original expansion joint device 100 is moved downward by 10-20mm and fixed, the expansion joint anchoring steel bar 600 is welded and connected with the bridge anchoring steel bar, and then the formwork is erected to pour concrete, so as to ensure that the top surface of the poured cast-in-place concrete layer 300 is flush with the top surface of the expansion joint device 100. After the cast-in-place concrete layer 300 is initially cured, the rubber strip 130 of the expansion joint device 100 is installed, and the adhesive 500 is applied on the surface of the cleaned cast-in-place concrete layer 300, the surface of the expansion joint device 100 and the intersecting asphalt pavement layer 400. When the adhesive 500 is applied, it is necessary to ensure uniform application and not to pollute the rubber strip 130. After the adhesive 500 meets the requirements, the special rubber plate is laid on the adhesive 500 in whole or in blocks.
[0056] Embodiment two
[0057] The embodiment of the utility model provides a kind of bridge, including the expansion joint structure of embodiment one.The beneficial effects of the embodiment have been described in embodiment one, which will not be repeated here.
[0058] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A structure for a contraction joint, characterized by The expansion joint structure comprises: an expansion joint device, an elastic buffer layer arranged on the top of the expansion joint device, and a cast-in-place concrete layer arranged on the bottom of the elastic buffer layer, wherein the top surface of the cast-in-place concrete layer is at the same height as the top surface of the expansion joint device.
2. The expansion joint structure according to claim 1, wherein further comprising an asphalt pavement layer, wherein the top surface of the asphalt pavement layer is at the same height as the top surface of the elastic buffer layer.
3. The expansion joint structure according to claim 2, wherein the elastic buffer layer comprises rubber plates, and the rubber plates have an integrated structure or a segmented structure.
4. The expansion joint structure according to claim 3, wherein the rubber plates are connected to the expansion joint device, the cast-in-place concrete layer and the asphalt pavement layer by means of an adhesive.
5. The expansion joint structure according to claim 4, wherein the thickness of the rubber plates ranges from 10 mm to 20 mm.
6. The expansion joint structure according to claim 1, wherein the expansion joint device comprises a first steel profile and a second steel profile, and the first steel profile and the second steel profile are arranged oppositely.
7. The expansion joint structure according to claim 6, wherein a rubber strip is connected between the first steel profile and the second steel profile.
8. The expansion joint structure according to claim 6, wherein the first steel profile and the second steel profile are respectively connected to bridge anchoring steel bars by means of expansion joint anchoring steel bars.
9. The expansion joint structure according to claim 8, wherein further comprising a bridge concrete layer arranged on the bottom of the cast-in-place concrete layer, and the bridge anchoring steel bars are arranged in the bridge concrete layer.
10. A bridge, characterized by The expansion joint structure according to any one of claims 1-9.