Reinforcing bridge expansion joint structure
By using a combination design of waterproof rubber and removable special-shaped steel in the bridge expansion joint structure, the problem of reduced strength and poor waterproof performance of the expansion joint structure under load and environmental pollution is solved, achieving higher safety and easier maintenance.
Patent Information
- Application Number
- CN202422161634.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-04
AI Technical Summary
When the bridge expansion joint structure is affected by vehicle load impact and environmental pollution for a long time, the strength is reduced, the waterproof performance is poor, and it is easy to damage, resulting in hidden dangers in bridge safety.
A reinforced bridge expansion joint structure is designed to enhance the waterproof performance of the expansion joint by connecting waterproof rubber on the movable special steel, which prevents rainwater from eroding into the water-stop rubber strips with sand, and enhances the waterproof performance of the expansion joint; at the same time, the combination of fixed special steel and movable special steel is used to removable design to enhance the structural strength of the bridge expansion joint structure and the connection part of the bridge.
It improves the waterproof performance and structural strength of the bridge expansion joint structure, extends the service life of the expansion joint, improves the driving safety of the bridge, and simplifies the replacement and operation and maintenance process.
Smart Images
Figure CN222961886U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge engineering, and more specifically relates to a reinforced bridge expansion joint structure. Background Art
[0002] Bridge expansion joints are important facilities for bridges to adapt to organic deformation under the action of temperature, load and concrete shrinkage and creep. They directly bear the dynamic impact of wheel loads, perennial wear and tear, and are directly affected by environmental pollution such as atmosphere, rain, oil, mud and sand. They are the most vulnerable parts of the bridge structure. If the bridge expansion joints are damaged, the joints will sink and inconsistent steps will appear. In severe cases, traffic accidents may occur, which will have a great adverse impact on bridge safety.
[0003] The bridge expansion joint is subjected to complex forces and needs to have sufficient flexibility, rigidity and strong lateral connection. At present, the general bridge pavement thickness is 8 to 15 cm, the anchoring concrete is thin and the steel bars are densely distributed, the actual anchoring effect is greatly discounted, and the expansion joint fails to form a strong combination with the bridge, thus reducing the strength and performance of the bridge expansion joint.
[0004] In addition, most expansion joints currently do not have good waterproof performance. Rainwater carries mud and sand, which destroys the expansion and contraction ability and durability of the expansion joint rubber. Since bridge expansion joints are consumable structures, they are easily damaged and need to be replaced regularly. Therefore, it is very necessary to design a reinforced bridge expansion joint structure that can be easily disassembled and assembled for bridge safety. Utility Model Content
[0005] The purpose of the utility model is to provide a reinforced bridge expansion joint structure, which is improved on the basis of the traditional bridge expansion joint structure, strengthens the expansion joint strength, prevents the expansion joint from being impacted by vehicle loads for a long time and reducing its strength, and prevents the rubber from being damaged by rainwater, sand and other scouring structures, so as to ensure the safety of the bridge. In addition, the improved expansion joint structure sets the expansion joint in a simple disassembly and assembly mode for easy replacement.
[0006] To achieve the above object, the utility model provides a reinforced bridge expansion joint structure, comprising:
[0007] Two special-shaped steel units are symmetrically arranged on both sides of the expansion joint, each of which comprises a fixed special-shaped steel and a movable special-shaped steel; the movable special-shaped steel is in an "I" shape, a first clamping groove is arranged on the upper side of the movable special-shaped steel, and a second clamping groove is arranged on the side of the movable special-shaped steel close to the expansion joint; the movable special-shaped steel is clamped in the fixed special-shaped steel;
[0008] A water-stop rubber strip, both ends of which are respectively clamped in the two second clamping grooves; and,
[0009] The waterproof rubber has two ends respectively clamped in the two first clamping grooves.
[0010] Furthermore, it further includes fixing bolts for connecting the fixed special-shaped steel and the movable special-shaped steel.
[0011] Furthermore, vertical threaded holes are provided on both the movable special-shaped steel and the fixed special-shaped steel, and the fixing bolts are threadedly connected in the threaded holes.
[0012] Furthermore, the inner walls of the first card slot and the second card slot both include arc-shaped surfaces.
[0013] Furthermore, it further includes a first embedded steel bar embedded in the reinforced concrete. The first embedded steel bar is L-shaped. One end of the first embedded steel bar is welded to the side wall of the fixed special-shaped steel, and the other end is connected to the bridge beam body. The first embedded steel bars are symmetrically arranged on both sides of the expansion joint.
[0014] Furthermore, it further includes a plurality of second embedded steel bars arranged in parallel and embedded in the reinforced concrete. The second embedded steel bars are welded to the lower side of the first embedded steel bar. The second embedded steel bars are symmetrically arranged on both sides of the expansion joint.
[0015] Furthermore, it further includes a third embedded steel bar embedded in the reinforced concrete. The third embedded steel bar is inverted U-shaped. The third embedded steel bar is welded to the lower side of the fixed special-shaped steel, and both ends of the third embedded steel bar are connected to the bridge beam body. The third embedded steel bars are symmetrically arranged on both sides of the expansion joint.
[0016] Compared with the prior art, the present utility model has the following technical effects:
[0017] In a reinforced bridge expansion joint structure of the present utility model, by connecting a waterproof rubber to the movable special-shaped steel, it can prevent rainwater carrying sand from flushing into the waterstop rubber strip and causing damage to the waterstop rubber strip, making the expansion joint structure have better waterproof performance; through the detachable design of the combination of the fixed special-shaped steel and the movable special-shaped steel, it can strengthen the firmness of the connection between the fixed special-shaped steel and the concrete above the bridge beam body, strengthen the structural strength of the connection part between the bridge expansion joint structure and the bridge, and improve its wear resistance, preventing the occurrence of step damage to the expansion joint structure caused by long-term vehicle load impact and wear damage, and improving the driving safety of the bridge. In addition, the expansion joint structure of the present utility model adopts snap connections in many places, which can facilitate simple disassembly and assembly, is convenient for replacement, and the later operation and maintenance management are relatively simple and convenient for later management.
[0018] A reinforced bridge expansion joint structure of the present utility model is relatively small and can adjust the structural thickness, is applicable to various types of bridges with various bridge panel thicknesses, and is convenient for popularization and implementation. Description of the Drawings
[0019] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 It is a schematic cross-sectional structure diagram of a bridge expansion joint structure strengthened provided by an embodiment of the present utility model;
[0021] Figure 2 is Figure 1 schematic top view structure diagram of.
[0022] Among them, each reference numeral in the figure:
[0023] 1. Movable special-shaped steel, 2. Fixed special-shaped steel, 3. Waterstop rubber strip, 4. Waterproof rubber, 5. Fixed bolt, 6. First embedded steel bar, 7. Second embedded steel bar, 8. Third embedded steel bar, 9. Bridge beam body, 10. Bridge abutment back wall, 11. Reinforced concrete. Specific embodiments
[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0025] It should be understood that the orientation or positional relationship indicated by the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 to the present utility model.
[0026] The terms used in the embodiments of the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The singular forms of "a", "the" and "said" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.
[0027] The terms "first" and "second" are only used for descriptive purposes to distinguish objects such as substances from each other, and shall not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. For example, without departing from the scope of the embodiments of the present utility model, the first XX may also be referred to as the second XX, and similarly, the second XX may also be referred to as the first XX. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.
[0028] Please refer to Figure 1 、 Figure 2 to describe a reinforced bridge expansion joint structure provided by the embodiments of the present utility model.
[0029] In one embodiment of the present utility model, a reinforced bridge expansion joint structure of the embodiments of the present utility model includes: two profiled steel units symmetrically arranged on both sides of the expansion joint, and each profiled steel unit includes a fixed profiled steel 2 and a movable profiled steel 1; the movable profiled steel 1 is in an "I" shape, a first card slot is provided on the upper side of the movable profiled steel 1, and a second card slot is provided on one side of the movable profiled steel 1 close to the expansion joint; the movable profiled steel 1 is clamped in the fixed profiled steel 2; both ends of the water stop rubber strip 3 are respectively clamped in the two second card slots; both ends of the waterproof rubber 4 are respectively clamped in the two first card slots.
[0030] A reinforced bridge expansion joint structure of the embodiments of the present utility model can prevent rainwater carrying sand from flushing into the water stop rubber strip 3 to cause damage to the water stop rubber strip 3 by connecting the waterproof rubber 4 to the movable profiled steel 1, so that the expansion joint structure has better waterproof performance; through the detachable design of the combination of the fixed profiled steel 2 and the movable profiled steel 1, the firmness of the combination between the fixed profiled steel 2 and the steel bars 11 above the bridge beam 9 can be strengthened, the structural strength of the connection part between the bridge expansion joint structure and the bridge can be enhanced, and its wear resistance can be improved, preventing the step damage of the expansion joint structure caused by the long-term impact and wear of vehicle loads, and improving the driving safety of the bridge. In addition, the expansion joint structure of the embodiments of the present utility model adopts snap connections in many places, which can be easily disassembled and assembled, is convenient for replacement, and the later operation and maintenance management is relatively simple and convenient for later management.
[0031] A reinforced bridge expansion joint structure of the embodiments of the present utility model is relatively small and can adjust the structural thickness, and is applicable to various types of bridges with various bridge panel thicknesses, which is convenient for popularization and implementation.
[0032] Furthermore, a reinforced bridge expansion joint structure according to an embodiment of the present utility model further includes a fixing bolt 5 for connecting and fixing the profiled steel 2 and the movable profiled steel 1 to enhance the integrity of the connection between the profiled steel 2 and the movable profiled steel 1 and improve the overall strength of the expansion joint structure. Further, vertical threaded holes are provided on both the movable profiled steel 1 and the fixed profiled steel 2, and the fixing bolt 5 is threadedly connected to the threaded holes.
[0033] Furthermore, the inner walls of the first card slot and the second card slot on the movable profiled steel 1 according to an embodiment of the present utility model both include arc surfaces, so that the two outwardly convex arc ends of the water stop rubber strip 3 and the waterproof rubber 4 can be conveniently connected or disassembled with the movable profiled steel 1.
[0034] Furthermore, a reinforced bridge expansion joint structure according to an embodiment of the present utility model further includes a first embedded steel bar 6 embedded in the reinforced concrete 11. The first embedded steel bar 6 is L-shaped. One end of the first embedded steel bar 6 is welded to the side wall of the fixed profiled steel 2, and the other end is connected to the bridge beam body 9. The first embedded steel bars 6 are symmetrically arranged on both sides of the expansion joint. By providing the first embedded steel bar 6, the integrity and firmness of the connection between the expansion joint structure and the bridge beam body 9 can be enhanced, the structural strength of the expansion joint can be improved, and the overall driving safety of the bridge can be improved.
[0035] Furthermore, a reinforced bridge expansion joint structure according to an embodiment of the present utility model further includes a plurality of second embedded steel bars 7 arranged in parallel and embedded in the reinforced concrete 11. The second embedded steel bars 7 are welded to the lower side of the first embedded steel bar 6. The second embedded steel bars 7 are symmetrically arranged on both sides of the expansion joint. By providing the second embedded steel bars 7, the structural strength of the expansion joint can be further improved, and the overall driving safety of the bridge can be improved.
[0036] Furthermore, a reinforced bridge expansion joint structure according to an embodiment of the present utility model further includes a third embedded steel bar 8 embedded in the reinforced concrete 11. The third embedded steel bar 8 is inverted U-shaped. The third embedded steel bar 8 is welded to the lower side of the fixed profiled steel 2. The two ends of the third embedded steel bar 8 are connected to the bridge beam body 9. The third embedded steel bars 8 are symmetrically arranged on both sides of the expansion joint. By providing the third embedded steel bar 8, the integrity and firmness of the connection between the expansion joint structure and the bridge beam body 9 can be enhanced, the structural strength of the expansion joint can be further improved, and the overall driving safety of the bridge can be improved.
[0037] In a specific embodiment, the model of the first embedded steel bar 6 is grade III steel Φ16@20, the model of the second embedded steel bar 7 is grade III steel Φ12, and the model of the third embedded steel bar 8 is grade III steel Φ16@20. The reinforced concrete 11 is C50 steel fiber concrete.
[0038] An embodiment of the present utility model also provides a construction method for a reinforced bridge expansion joint structure, including the following steps:
[0039] S1: Weld the fixed profiled steel 2 to the first embedded steel bar 6 (grade-3 steel Φ16@20) and the third embedded steel bar 8 (grade-3 steel Φ16@20), and strengthen and fix the first embedded steel bar 6 (grade-3 steel Φ16@20) through the second embedded steel bar 7 (grade-3 steel Φ12).
[0040] S2: Pour the C50 steel fiber reinforced concrete 11, and embed and fix the fixed profiled steel 2 to the bridge beam body 9 and the back wall 10 of the bridge abutment through the first embedded steel bar 6 (grade-3 steel Φ16@20), the second embedded steel bar 7 (grade-3 steel Φ12), and the third embedded steel bar 8 (grade-3 steel Φ16@20). Strengthen the stability of the first embedded steel bar 6 (grade-3 steel Φ16@20) through the second embedded steel bar 7 (grade-3 steel Φ12), and strengthen the firmness of the bridge expansion joint structure through the embedded connection of the first embedded steel bar 6 (grade-3 steel Φ16@20) and the third embedded steel bar 8 (grade-3 steel Φ16@20), etc.
[0041] S3: Adopt the embedded card slot method to fix the movable profiled steel 1 in the fixed profiled steels 2 at both ends of the expansion joint. And strengthen the connection between the movable profiled steel 1 and the fixed profiled steel 2 through the fixing bolts 5.
[0042] S4: Adopt the embedded card slot method to fix the water stop rubber strip 3 in the movable profiled steels 1 at both ends of the expansion joint.
[0043] S5: Adopt the embedded card slot method to fix the waterproof rubber 4 in the movable profiled steels 1 at both ends of the expansion joint. The surface is flush with the bridge to prevent rainwater from entering the expansion joint and the rainwater and gravel from damaging the water stop rubber strip 3.
[0044] The lengths of the first embedded steel bar 6 (grade-3 steel Φ16@20) and the third embedded steel bar 8 (grade-3 steel Φ16@20) can be adjusted according to the thickness of different bridge decks, and can adapt to bridges with various panel thicknesses.
[0045] If the subsequent expansion joint is damaged, the movable profiled steel 1, the water stop rubber strip 3, and the waterproof rubber 4 can all be disassembled and replaced more conveniently, can be simply disassembled and assembled, and the later operation and maintenance management are relatively simple and convenient for later management.
[0046] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.
Claims
1. A reinforced bridge expansion joint structure, characterized in that: include: Two special-shaped steel units are symmetrically arranged on both sides of the expansion joint, each of which comprises a fixed special-shaped steel and a movable special-shaped steel; the movable special-shaped steel is in an "I" shape, a first clamping groove is arranged on the upper side of the movable special-shaped steel, and a second clamping groove is arranged on the side of the movable special-shaped steel close to the expansion joint; the movable special-shaped steel is clamped in the fixed special-shaped steel; A water-stop rubber strip, both ends of which are respectively clamped in the two second clamping grooves; and, The waterproof rubber has two ends respectively clamped in the two first clamping grooves.
2. A reinforced bridge expansion joint structure as claimed in claim 1, characterized in that: It also includes fixing bolts, which are used to connect the fixed special-shaped steel and the movable special-shaped steel.
3. A reinforced bridge expansion joint structure as claimed in claim 2, characterized in that: The movable special-shaped steel and the fixed special-shaped steel are both provided with vertical threaded holes, and the fixing bolts are threadedly connected in the threaded holes.
4. A reinforced bridge expansion joint structure as claimed in claim 1, characterized in that: The inner walls of the first clamping slot and the second clamping slot both include arc-shaped surfaces.
5. A reinforced bridge expansion joint structure as claimed in claim 1, characterized in that: It also includes a first embedded steel bar embedded in the reinforced concrete, the first embedded steel bar is L-shaped, one end of the first embedded steel bar is welded to the side wall of the fixed special-shaped steel, and the other end is connected to the bridge beam; the first embedded steel bar is symmetrically arranged on both sides of the expansion joint.
6. A reinforced bridge expansion joint structure as claimed in claim 5, characterized in that: It also includes a plurality of second embedded steel bars embedded in the reinforced concrete and arranged in parallel, wherein the second embedded steel bars are welded to the lower side of the first embedded steel bars; and the second embedded steel bars are symmetrically arranged on both sides of the expansion joint.
7. A reinforced bridge expansion joint structure according to any one of claims 1 to 6, characterized in that: It also includes a third embedded steel bar embedded in the reinforced concrete, the third embedded steel bar is in an inverted U shape, the third embedded steel bar is welded to the lower side of the fixed special-shaped steel, and both ends of the third embedded steel bar are connected to the bridge beam body; the third embedded steel bar is symmetrically arranged on both sides of the expansion joint.