Urban bridge sidewalk expansion joint device
By introducing the main beam side and abutment side expansion joint plates and drainage prevention structures into the expansion joints of urban bridge sidewalks, the size of the comb plate is optimized and local bent is set, the problems of complex construction, high cost and insufficient drainage are solved, and the effects of high comfort, good safety and convenient construction are achieved.
Patent Information
- Application Number
- CN202421712483.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The design of existing urban bridge sidewalk expansion joints has problems such as complex construction, high cost, poor comfort and lack of drainage measures.
The expansion joint plates on the main beam and abutment side and a waterproof structure are adopted, including the first connecting piece, a cross-slit comb plate, a fixed comb plate, a water stop belt and a drainage pipe. The size of the comb plate is optimized and local bent is set to achieve effective drainage and simplify structural connections.
It improves the comfort and safety of the sidewalk, simplifies the construction process, solves the problem of bridge drainage, and reduces construction costs.
Smart Images
Figure CN223118847U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge engineering, and particularly relates to a bridge expansion joint device, specifically a sidewalk expansion joint device for urban bridges. Background Art
[0002] The sidewalk expansion joint refers to a gap or joint set in the pedestrian passages on both sides of the bridge deck or at the connection between the sidewalk and other building supports due to the expansion and contraction of the bridge. It can relieve the deformation of the bridge structure caused by factors such as thermal expansion and contraction and earthquakes, and at the same time facilitate the passage of pedestrians. With the high-quality development of urban bridge construction, the requirements for the setting of urban bridge sidewalks are getting higher and higher. Considering the construction cost, the design of urban bridge sidewalk expansion joints generally adopts a simple method. The sidewalk of an urban bridge is only for pedestrians. One method adopted in the design is to extend the expansion joint of the roadway to the sidewalk and make a special design for the sidewalk structure at the beam end. This method is complex in construction and high in cost. Another commonly used method is to adopt a simple steel plate expansion joint structure, generally without drainage prevention measures. The smoothness and comfort of the expansion joint surface are poor, and the rainwater on the bridge deck is easily discharged directly under the bridge from the expansion joint, resulting in the expansion joint and the bridge structure being eroded by rainwater. Content of the Utility Model
[0003] In view of this, the purpose of the utility model is to provide a sidewalk expansion joint device for urban bridges to solve the deficiencies in the prior art.
[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:
[0005] Provide a sidewalk expansion joint device for urban bridges, which includes:
[0006] The main beam side expansion joint plate member, including a first connecting piece, a cross-gap comb tooth plate and a main beam side expansion joint baffle. The main beam side expansion joint baffle is vertically established on one side of the main beam of the sidewalk expansion joint. The first connecting pieces are arranged at intervals along the transverse direction of the bridge. The first connecting pieces are respectively welded to the top surface of the main beam and one side of the main beam side expansion joint baffle. The cross-gap comb tooth plate straddles the top of the sidewalk expansion joint and is respectively welded to the top surface of the first connecting piece and the main beam side railing foundation.
[0007] The expansion joint plate on the abutment side includes a second connecting piece, a fixed comb tooth plate, an expansion joint baffle on the abutment side, and a steel backing plate. The expansion joint baffle on the abutment side is vertically installed on the abutment side of the sidewalk expansion joint. The second connecting pieces are arranged at intervals in the transverse direction of the bridge. The second connecting pieces are welded to the internal steel bar structure of the abutment. The steel backing plate is welded to the top surface of the second connecting piece. The fixed comb tooth plate is welded to the top surface of the steel backing plate. The fixed comb tooth plate is adjacent to the across-seam comb tooth plate. The fixed comb tooth plate and the across-seam comb tooth plate are on the same horizontal plane;
[0008] The waterproof and drainage structure drains the accumulated water in the sidewalk expansion joint.
[0009] As for the sidewalk expansion joint device of the urban bridge, the across-seam comb tooth plate and the fixed comb tooth plate are both double-sided wavy comb tooth plates.
[0010] As for the sidewalk expansion joint device of the urban bridge, the distance between the across-seam comb tooth plate and the fixed comb tooth plate is the same as the width of the sidewalk expansion joint.
[0011] As for the sidewalk expansion joint device of the urban bridge, the waterproof and drainage structure includes a waterstop and a drain pipe. The waterstop is arranged in the sidewalk expansion joint along the extension direction of the sidewalk expansion joint. The drain pipes are arranged at both ends of the sidewalk expansion joint and are communicated with the waterstop.
[0012] As for the sidewalk expansion joint device of the urban bridge, the internal steel bar structure of the abutment includes the cast-in-place layer steel bars of the abutment and the embedded steel bars of the abutment which are welded to each other. The cast-in-place layer steel bars of the abutment are welded to the second connecting piece.
[0013] The beneficial effects of the technical solution of the present utility model are:
[0014] A permanent expansion joint applicable to the sidewalk of an urban bridge is proposed. By optimizing the size of the comb tooth plate, the pedestrian comfort can be improved. By locally bending up the across-seam comb tooth plate and setting the waterproof and drainage structure, the bridge drainage problem can be effectively solved. And by simplifying the structural connection, the construction is facilitated; the present utility model has complete functions, simple structure, convenient construction, good pedestrian safety and high comfort. Description of the Drawings
[0015] To further illustrate the above-mentioned objects, structural features and effects of the present utility model, the present utility model will be described in detail below with reference to the drawings.
[0016] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present utility model;
[0017] Figure 2 For Figure 1 The sectional view taken along the line A-A in
[0018] Figure 3 is Figure 1 the sectional view taken along line B-B in
[0019] Figure 4 is Figure 1 the sectional view taken along line C-C in
[0020] Figure 5 is Figure 1 the sectional view taken along line D-D in
[0021] Figure 6 is Figure 5 the partial enlarged view of part E in
[0022] Figure 7 is the plan view of the cross-seam comb tooth plate and the fixed comb tooth plate of the preferred embodiment of the present utility model;
[0023] In the figure: 0, sidewalk expansion joint; 00, main beam; 000, abutment; 1, first connecting member; 2, cross-seam comb tooth plate; 3, main beam side expansion joint baffle; 4, main beam side railing foundation; 5, second connecting member; 6, fixed comb tooth plate; 7, abutment side expansion joint baffle; 8, steel backing plate; 9, water stop; 10, drain pipe; 11, abutment cast-in-place layer steel bars; 12, abutment embedded steel bars; 13, abutment side railing foundation. Detailed implementation manners
[0024] The term "utility model" used in this specification, as well as "the present utility model", are intended to refer generally to all the subject matters of this specification and any of the following patent claims. Statements containing these terms should not be construed as limiting the subject matter described herein or the meaning or scope of any of the following patent claims. In addition, this specification does not attempt to describe or limit the subject matter covered by any specific component, paragraph, statement, or claim of this application. The subject matter should be understood with reference to the entire specification, all the drawings, and any of the following claims. The present utility model may have other embodiments and may be practiced or implemented in other ways. Moreover, it should be understood that the wording and terms used herein are for illustrative purposes and should not be considered limiting.
[0025] Details of the present utility model will now be discussed with reference to the drawings of the present utility model, which are provided by way of example only. In the drawings, like features or components may be labeled with the same reference numerals.
[0026] As used herein, the terms "comprising", "having", "including" and their variants are meant to include the items listed hereinafter, their equivalents and additional items. Although directions such as above, below, upward, downward, backward, bottom, top, front, back, etc. may be referred to in the description of the drawings for convenience with reference to the drawings, these directions are not intended to be literally accepted or limit the present utility model in any form. In addition, terms such as "first", "second", "third", etc. are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.
[0027] Referring to Figures 1 to 7 As shown, the expansion joint device for the sidewalk of an urban bridge of the present utility model includes a main girder side expansion joint plate member, an abutment side expansion joint plate member and a waterproof and drainage structure. In a preferred embodiment, the main girder side expansion joint plate member includes a first connecting member 1, a cross-seam comb tooth plate 2 and a main girder side expansion joint baffle 3. The main girder side expansion joint baffle 3 is vertically arranged on one side of the main girder 00 of the sidewalk expansion joint 0. The first connecting members 1 are arranged at intervals in the transverse direction of the bridge. The first connecting members 1 are respectively welded to the top surface of the main girder and one side of the main girder side expansion joint baffle 3. When the main girder 00 is made of steel structure, the height of the first connecting member 1 is determined by the thickness of the bridge deck pavement layer. The first connecting members 1 are preferably arranged at intervals of 200 - 400 mm in the transverse direction of the bridge. Concrete is filled between the first connecting members 1. The top of the first connecting member 1 on the side away from the expansion joint is chamfered to prevent local damage to the pavement layer. The cross-seam comb tooth plate 2 straddles the top of the sidewalk expansion joint 0 and is respectively welded to the top surface of the first connecting member 1 and the main girder side railing foundation 4.
[0028] The abutment side expansion joint plate member includes a second connecting member 5, a fixed comb tooth plate 6, an abutment side expansion joint baffle 7 and a steel backing plate 8. The abutment side expansion joint baffle 7 is vertically arranged on one side of the abutment 000 of the sidewalk expansion joint 0. The second connecting members 5 are arranged at intervals in the transverse direction of the bridge. The second connecting members 5 are welded to the internal steel bar structure of the abutment. The steel backing plate 8 is welded to the top surface of the second connecting member 5. The fixed comb tooth plate 6 is welded to the top surface of the steel backing plate 8. The fixed comb tooth plate 6 is located adjacent to the cross-seam comb tooth plate 2. The fixed comb tooth plate 6 and the cross-seam comb tooth plate 2 are on the same horizontal plane.
[0029] The waterproof and drainage structure is used to drain the accumulated water in the sidewalk expansion joint 0.
[0030] Continuing to refer to Figures 1 to 6 As shown, preferably, the steel backing plate 8 is a rectangular plate, and the top surface of the steel backing plate 8 is polished for rust prevention and anti-slip treatment.
[0031] Referring to Figure 1 and Figure 7As shown in the figure, both the cross-seam comb tooth plate 2 and the fixed comb tooth plate 6 are double-sided wavy comb tooth plates. The cross-seam comb tooth plate 2 is locally bent at the railing base, and the bending height is determined according to the height of the railing base, aiming to prevent rainwater from flowing directly down through the gap between the main girder side railing foundation 4 and the abutment side railing foundation 13. The width direction of the cross-seam comb tooth plate 2 should span the expansion joint, and its minimum distance extending to the abutment side should not be less than (expansion joint width + 20 mm). The cross-seam comb tooth plate 2 is welded to the first connecting piece 1 and the main girder side railing foundation 4 on the main girder 00 side, and is lapped with the steel backing plate 8 and the abutment side railing foundation 13 on the abutment side. The two sides of the fixed comb tooth plate 6 should be subjected to peak shaving treatment to ensure pedestrian comfort. Further, the distance between the cross-seam comb tooth plate 2 and the fixed comb tooth plate 6 is the same as the width of the sidewalk expansion joint 0.
[0032] Both of the two expansion joint baffles are rectangular thin steel plates, and the height of the steel plate is determined by the thickness of the cast-in-place layers on both sides.
[0033] The waterproof and drainage structure includes a waterstop 9 and a drain pipe 10. The waterstop 9 is arranged in the sidewalk expansion joint 0 along the extension direction of the sidewalk expansion joint 0, and is connected to the expansion joint baffles on both sides. The drain pipe 10 is arranged at both ends of the sidewalk expansion joint 0 and is communicated with the waterstop 9, so that the water flowing into the expansion joint is discharged along the drain pipe 10. The waterstop 9 is preferably a steel waterstop.
[0034] See Figure 3 As shown in the figure, the internal steel bar structure of the abutment includes the abutment cast-in-place layer steel bars 11 and the abutment embedded steel bars 12 which are welded to each other. The abutment cast-in-place layer steel bars 11 are welded to the second connecting piece 5. The abutment embedded steel bars 12 are embedded during the construction of the abutment, and their transverse spacing is preferably 200 - 400 mm. The abutment cast-in-place layer steel bars 11 and the second connecting piece 5 are arranged at the corresponding positions of the embedded steel bars.
[0035] It should be noted that in the preferred embodiment, the first connecting piece 1 is used for the case where the main girder 00 is a steel structure beam. If the main girder 00 is a concrete structure, the first connecting piece 1 can be adjusted and replaced with reference to the second connecting piece 5, the abutment cast-in-place layer steel bars 11 and the abutment embedded steel bars 12 or be replaced according to actual requirements.
[0036] The above is only the preferred embodiment of the present utility model, and does not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be able to realize that all the equivalent replacements and obvious changes made by using the description and illustrations of the present utility model should be included in the protection scope of the present utility model.
Claims
1. An expansion joint device for the sidewalk of an urban bridge, characterized in that, Comprising: The main girder side expansion joint plate member includes a first connecting member, a cross-joint comb tooth plate, and a main girder side expansion joint baffle. The main girder side expansion joint baffle is vertically installed on the main girder side of the sidewalk expansion joint. The first connecting members are arranged at intervals in the transverse direction of the bridge. The first connecting members are respectively welded to the top surface of the main girder and one side of the main girder side expansion joint baffle. The cross-joint comb tooth plate straddles the top of the sidewalk expansion joint and is respectively welded to the top surface of the first connecting member and the main girder side railing foundation; The abutment side expansion joint plate member includes a second connecting member, a fixed comb tooth plate, an abutment side expansion joint baffle, and a steel backing plate. The abutment side expansion joint baffle is vertically installed on the abutment side of the sidewalk expansion joint. The second connecting members are arranged at intervals in the transverse direction of the bridge. The second connecting members are welded to the internal steel bar structure of the abutment. The steel backing plate is welded to the top surface of the second connecting member. The fixed comb tooth plate is welded to the top surface of the steel backing plate. The fixed comb tooth plate is located adjacent to the cross-joint comb tooth plate. The fixed comb tooth plate and the cross-joint comb tooth plate are at the same horizontal plane; A waterproof and drainage structure for discharging the accumulated water in the sidewalk expansion joint.
2. The expansion joint device for the sidewalk of an urban bridge according to claim 1, characterized in that Both the cross-joint comb tooth plate and the fixed comb tooth plate are double-sided wavy comb tooth plates.
3. The expansion joint device for the sidewalk of an urban bridge according to claim 2, characterized in that, The distance between the cross-joint comb tooth plate and the fixed comb tooth plate is the same as the width of the sidewalk expansion joint.
4. The expansion joint device for the sidewalk of an urban bridge according to claim 1, characterized in that, The waterproof and drainage structure includes a waterstop belt and a drain pipe. The waterstop belt is arranged in the sidewalk expansion joint along the extension direction of the sidewalk expansion joint. The drain pipes are arranged at both ends of the sidewalk expansion joint and are communicated with the waterstop belt.
5. The expansion joint device for the sidewalk of an urban bridge according to claim 1, characterized in that, The internal steel bar structure of the abutment includes the cast-in-place layer steel bars of the abutment and the embedded steel bars of the abutment which are welded to each other. The cast-in-place layer steel bars of the abutment are welded to the second connecting member.