Connecting structure of steel box girder and old concrete bridge
By designing a connecting structure including concrete layer, steel box girder body and connecting block, the problems of insufficient integrity and poor support strength of the connecting structure between the existing steel box girder and the old concrete bridge are solved, and a more stable connection effect is achieved and able to effectively withstand larger weights.
Patent Information
- Application Number
- CN202421233527.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-01
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-01
AI Technical Summary
The connection structure between the existing steel box girders and the old concrete bridge is insufficient integrity, the support strength is poor, and it is difficult to withstand large weights, resulting in possible breakage on the road surface.
A connection structure including a concrete layer, a steel box girder body and a connecting block is designed. The stable connection between the steel box girder and the concrete bridge is achieved through the connection groove, connecting plate, connecting steel bar, clamping device, support plate and bolts.
The integrity and support stability of steel box girders and concrete bridges are improved, and can more effectively withstand larger weights and avoid problems such as road fractures.
Smart Images
Figure CN222613986U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge construction, in particular to a connection structure of a steel box girder and an old concrete bridge. Background Art
[0002] A steel box girder is a structure used in bridge engineering. It is usually made of steel and has a rectangular or box-shaped cross-section. Steel box girders have the advantages of high strength, light weight, durability and fast construction speed, so they have been widely used in modern bridge construction.
[0003] In the reconstruction and reinforcement of the original road surface, the ends of the steel box girders are fixed to the embedded parts of the concrete bridge or the ends of the concrete box girders by welding, or the steel box girders are connected to the embedded parts of the concrete bridge or the ends of the concrete box girders by high-strength bolts. However, the integrity of the connection structure between these two types of steel box girders and the old concrete bridge is insufficient, and the supporting strength is poor. Once the connection structure is installed on the original road surface, its upper and lower surfaces are not strong enough to bear a large weight, which will cause the road surface to break. Utility Model Content
[0004] In view of the problems existing in the prior art, the utility model provides a connection structure between a steel box girder and an old concrete bridge to solve the technical problem of poor supporting strength of the connection structure mentioned in the background art.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connection structure of a steel box girder and an old concrete bridge, comprising a concrete layer, a steel box girder body and a connecting block, a connecting groove being provided in the connecting block, a connecting plate being provided in the connecting groove, connecting steel bars being provided in the concrete layer, the connecting steel bars passing through the connecting plate and the steel box girder body, a connecting sleeve being provided on the steel box girder body, a fixing sleeve being threadedly connected to the connecting sleeve, a clamping device being provided on the fixing sleeve, a supporting plate being provided on the connecting block, a first bolt being provided between the supporting plate and the steel box girder body, a fixing sleeve being provided in the concrete layer, and a second bolt being provided between the supporting plate and the fixing sleeve.
[0006] The present invention is further configured such that a plurality of connecting rails are provided at the bottom of the connecting groove to facilitate the movable installation of the connecting plate.
[0007] The utility model is further configured such that the clamping device includes a clamping sleeve, a clamping ring is provided in the clamping sleeve, and the relative position of the clamping device and the connecting steel bar is fixed by the cooperation of the clamping ring and the clamping sleeve, and the relative position of the connecting steel bar and the steel box girder body is fixed by the cooperation of the fixing sleeve and the connecting sleeve.
[0008] The utility model is further configured such that the clamping ring is conical and a clamping groove is provided on the clamping ring to facilitate clamping the clamping ring toward one side of the connecting steel bar.
[0009] The utility model is further configured such that a protective cap is provided on the threaded connection of the clamping sleeve to protect the connecting steel bars and prevent the connecting steel bars from rusting.
[0010] The utility model is further configured such that an extrusion ring is provided in the protective cap, the extrusion ring is in conflict with the clamping ring, and the clamping ring is clamped toward one side of the connecting steel bar through the extrusion ring.
[0011] The utility model is further configured such that a support tube cooperating with the first bolt and the second bolt is provided on the support plate, and the support tube improves the waterproof sealing effect between the first bolt and the support plate and between the second bolt and the support plate.
[0012] The utility model is further configured such that a support pad is provided in the support tube, thereby improving the thread engagement force between the first bolt and the steel box beam body and between the second bolt and the fixed sleeve.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. Connecting blocks and connecting plates are set between the concrete layer and the steel box girder body, and connected by connecting steel bars. This can connect the steel box girder to the existing concrete bridge, improving the integrity of the connection; supporting plates are set to support the bridge deck, improving the support stability;
[0015] 2. The connecting steel bars are clamped and fixed by the clamping device. The relative position of the clamping device and the connecting steel bars is fixed by the cooperation of the fixing sleeve and the connecting sleeve. The connecting steel bars can be wrapped by the protective cap to prevent the connecting steel bars from rusting and affecting the structural strength of the bridge body.
[0016] 3. The first bolt is set to connect the support plate and the steel box beam body. The cooperation of the second bolt and the fixed sleeve facilitates the connection between the support plate and the concrete layer, thereby improving the stability of the support plate connection support. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the coordinated structure of the concrete layer, steel box beam body, connection block and support plate in the present invention;
[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the concrete layer, steel box beam body, connection block and support plate in the present invention;
[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the clamping device in the utility model;
[0020] Figure 4 This is a schematic diagram of the overall structure of the clamping ring in the present invention;
[0021] Figure 5 It is a schematic diagram of the matching structure of the second bolt, the fixing sleeve, the support tube and the support pad in the present invention.
[0022] In the figure: 1. Concrete layer; 2. Steel box girder body; 3. Connecting block; 4. Connecting groove; 5. Connecting plate; 6. Connecting steel bar; 7. Connecting sleeve; 8. Fixing sleeve; 9. Support plate; 10. First bolt; 11. Fixing sleeve; 12. Second bolt; 13. Connecting rail; 14. Clamping sleeve; 15. Clamping ring; 16. Clamping groove; 17. Protective cap; 18. Extrusion ring; 19. Support tube; 20. Support pad. DETAILED DESCRIPTION
[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.
[0025] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually relative to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned direction words are not used to limit the present invention.
[0026] See also Figure 1-5 A connection structure of a steel box girder and an old concrete bridge comprises a concrete layer 1, a steel box girder body 2 and a connecting block 3. A connecting groove 4 is provided in the connecting block 3, a connecting plate 5 is provided in the connecting groove 4, a connecting steel bar 6 is provided in the concrete layer 1, and the connecting steel bar 6 passes through the connecting plate 5 and the steel box girder body 2. A connecting sleeve 7 is provided on the steel box girder body 2, and a fixing sleeve 8 is threadedly connected to the connecting sleeve 7. A clamping device is provided on the fixing sleeve 8, a supporting plate 9 is provided on the connecting block 3, a first bolt 10 is provided between the supporting plate 9 and the steel box girder body 2, a fixing sleeve 11 is provided in the concrete layer 1, and a second bolt 12 is provided between the supporting plate 9 and the fixing sleeve 11, a plurality of connecting rails 13 are provided at the bottom of the connecting groove 4, a supporting tube 19 matched with the first bolt 10 and the second bolt 12 is provided on the supporting plate 9, and a supporting pad 20 is provided in the supporting tube 19.
[0027] In this embodiment, when connecting the steel box girder and the old concrete bridge, the longitudinal reinforcement of the old concrete bridge structure is cleaned, and a fixing sleeve 11 is drilled and buried in the concrete layer 1 of the old concrete bridge. The position of the fixing sleeve 11 is fixed by concrete or mortar. Subsequently, the support plate 9 and the connecting block 3 are moved to the connection between the steel box girder and the old concrete bridge. The support plate 9 and the fixing sleeve 11 are connected and fixed by the second bolt 12. The connecting plate 5 is installed in the connecting groove 4 along the connecting track 13, and the connecting steel bar 6 passes through the connecting plate 5. Move the connecting plate 5 to the center position of the connecting groove 4 to support the connecting block 3, and then install the steel box girder 2 laterally. When moving the steel box girder 2, make the connecting steel bar 6 pass through the connecting sleeve 7 of the steel box girder 2. After the installation position is accurate, fix it with the clamping device and the fixing sleeve 8, and install and fix the support plate 9 and the steel box girder 2 with the first bolt 10 and the nut. Finally, lay concrete or asphalt on the support plate 9 to achieve the integral connection of the steel box girder 2, the connecting block 3 and the concrete layer 1 of the old concrete bridge, and complete the road surface reconstruction.
[0028] See also Figure 5 As an implementation method of the clamping device: the clamping device includes a clamping sleeve 14, a clamping ring 15 is provided in the clamping sleeve 14, the clamping ring 15 is conical, a clamping groove 16 is provided on the clamping ring 15, a protective cap 17 is threadedly connected to the clamping sleeve 14, an extrusion ring 18 is provided in the protective cap 17, and the extrusion ring 18 conflicts with the clamping ring 15.
[0029] More specifically, when fixing the connecting steel bar 6, the clamping sleeve 14 and the fixing sleeve 8 are sleeved on the connecting steel bar 6, and the fixing sleeve 8 and the connecting sleeve 7 are threadedly installed to a certain depth, and then the clamping ring 15 is extended into the clamping sleeve 14, and a protective cap 17 is sleeved on the connecting steel bar 6. The protective cap 17 is threadedly rotated on the clamping sleeve 14. While installing and fixing the protective cap 17, the extrusion ring 18 is driven to move and extrude toward the side of the clamping ring 15, so that the clamping ring 15 is squeezed toward the side of the connecting steel bar 6, thereby fixing the relative positions of the clamping ring 15, the clamping sleeve 14 and the connecting steel bar 6. At the same time, the fixing sleeve 8 cooperates with the connecting sleeve 7 to achieve the fixation of the position between the connecting steel bar 6 and the connecting sleeve 7. The wrapping effect of the protective cap 17 and the connecting steel bar 6 prevents the connecting steel bar 6 from rusting.
[0030] In summary: when connecting the steel box girder and the old concrete bridge, the longitudinal reinforcement of the old concrete bridge structure is cleaned, and a fixed sleeve 11 is drilled and buried in the concrete layer 1 of the old concrete bridge, and the position of the fixed sleeve 11 is fixed by concrete or mortar, and then the support plate 9 and the connecting block 3 are moved to the connection between the box girder and the old concrete bridge, and the support plate 9 and the fixed sleeve 11 are connected and fixed by the second bolt 12, and the connecting plate 5 is installed in the connecting groove 4 along the connecting track 13, so that the connecting steel bar 6 passes through the connecting plate 5, so that the connection The connecting plate 5 is moved to the center position of the connecting groove 4 to support the connecting block 3, and then the steel box girder body 2 is installed laterally. When the steel box girder body 2 is moved, the connecting steel bar 6 is passed through the connecting sleeve 7 of the steel box girder body 2. After the installation position is accurate, it is fixed by the clamping device and the fixing sleeve 8, and the support plate 9 and the steel box girder body 2 are installed and fixed by the first bolt 10 and the nut. Finally, concrete or asphalt is laid on the support plate 9 to achieve the overall connection between the steel box girder body 2, the connecting block 3 and the concrete layer 1 of the old concrete bridge, and the road surface reconstruction is completed.
[0031] When fixing the connecting steel bar 6, the clamping sleeve 14 and the fixing sleeve 8 are sleeved on the connecting steel bar 6, and the fixing sleeve 8 and the connecting sleeve 7 are threadedly installed to a certain depth, and then the clamping ring 15 is extended into the clamping sleeve 14, and a protective cap 17 is sleeved on the connecting steel bar 6. The protective cap 17 is threadedly rotated on the clamping sleeve 14. While installing and fixing the protective cap 17, the extrusion ring 18 is driven to move and extrude toward one side of the clamping ring 15, so that the clamping ring 15 is squeezed toward the side of the connecting steel bar 6, thereby fixing the relative positions of the clamping ring 15, the clamping sleeve 14 and the connecting steel bar 6. At the same time, the fixing sleeve 8 cooperates with the connecting sleeve 7 to realize the fixation of the position between the connecting steel bar 6 and the connecting sleeve 7, and the wrapping effect of the protective cap 17 and the connecting steel bar 6 prevents the connecting steel bar 6 from rusting.
[0032] In all the schemes mentioned above, the connection between the two components can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be listed here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.
Claims
1. A connection structure of a steel box girder and an old concrete bridge, comprising a concrete layer (1), a steel box girder body (2) and a connection block (3), wherein: A connecting groove (4) is provided in the connecting block (3), a connecting plate (5) is provided in the connecting groove (4), a connecting steel bar (6) is provided in the concrete layer (1), the connecting steel bar (6) passes through the connecting plate (5) and the steel box girder body (2), a connecting sleeve (7) is provided on the steel box girder body (2), a fixing sleeve (8) is threadedly connected to the connecting sleeve (7), a clamping device is provided on the fixing sleeve (8), a supporting plate (9) is provided on the connecting block (3), a first bolt (10) is provided between the supporting plate (9) and the steel box girder body (2), a fixing sleeve (11) is provided in the concrete layer (1), and a second bolt (12) is provided between the supporting plate (9) and the fixing sleeve (11).
2. The connection structure of a steel box girder and an old concrete bridge according to claim 1 is characterized in that: A plurality of connection rails (13) are provided at the bottom of the connection groove (4).
3. The connection structure of a steel box girder and an old concrete bridge according to claim 1 is characterized in that: The clamping device comprises a clamping sleeve (14), wherein a clamping ring (15) is arranged inside the clamping sleeve (14).
4. The connection structure of a steel box girder and an old concrete bridge according to claim 3 is characterized in that: The clamping ring (15) is conical, and a clamping groove (16) is provided on the clamping ring (15).
5. The connection structure of a steel box girder and an old concrete bridge according to claim 3 is characterized in that: A protective cap (17) is threadedly connected to the clamping sleeve (14).
6. The connection structure of a steel box girder and an old concrete bridge according to claim 5 is characterized in that: An extrusion ring (18) is provided inside the protective cap (17), and the extrusion ring (18) is in conflict with the clamping ring (15).
7. The connection structure of a steel box girder and an old concrete bridge according to claim 1 is characterized in that: The support plate (9) is provided with a support tube (19) which cooperates with the first bolt (10) and the second bolt (12).
8. The connection structure of a steel box girder and an old concrete bridge according to claim 7 is characterized in that: A support pad (20) is provided in the support tube (19).