A formwork-free wet joint structure of a steel-concrete composite bridge
By setting up the interlacing and docking of H-shaped steel plates and annular steel bars at the wet joints of the steel-concrete combination bridge, and combining the connection method of steel columns, the problems of complex wet joint casting operation and high construction difficulty in the prior art are solved, efficient wet joint connection and improved construction speed.
Patent Information
- Application Number
- CN202420975172.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The casting of existing steel-concrete combination bridges at wet joints requires the erecting of bracket templates in advance, which is complicated in operation and large in welding and binding of steel bars, resulting in high construction difficulty and slow speed.
Using a wet joint structure without support, the connection between the two prefabricated bridge panels is achieved by setting up H-shaped steel plates at the wet joints and opening through grooves in the horizontal and vertical parts of the H-shaped steel plates, and combining the interlaced and docking of the annular steel bars, the connection between the two prefabricated bridge panels is achieved.
The concrete pouring operation in the wet joint area is simplified, the number of on-site steel bar binding and welding is reduced, and the performance and construction efficiency of wet joints are improved.
Smart Images
Figure CN222700804U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge engineering, and in particular relates to a formwork-free steel-concrete composite bridge wet joint structural structure. Background Art
[0002] Steel-concrete composite bridges are a type of structure that is composed of steel beams and concrete slabs combined into a whole through shear connectors to bear the force together. It can give full play to the material characteristics of steel in tension and concrete in compression, and inherits the advantages of both steel bridges and concrete bridges. However, due to the difference in material properties between steel and concrete, the internal force of the structure is relatively complex under the influence of temperature, concrete shrinkage creep, etc. In order to reduce the influence of concrete shrinkage on the force of composite beam bridge structures, most steel-concrete composite bridges currently use prefabricated bridge decks. After the prefabricated bridge decks are cast and maintained in the factory, they are transported to the construction site and installed on the erected steel beams. Then, the adjacent prefabricated bridge decks are combined into a whole through connection structures to bear the force together. The use of different connection structures will have a certain impact on the integrity, lateral stiffness and construction complexity of the composite bridge. Therefore, the strength of the connection structure between prefabricated bridge decks has become a key factor affecting the performance of the steel-concrete composite bridge structure.
[0003] At present, the precast bridge deck of steel-concrete composite bridges generally adopts wet joints. In actual projects, the pouring of joint concrete requires the setting up of support formwork in advance, which is complicated and requires a large amount of steel bar welding and binding, which reduces the construction speed and the performance of wet joints. Utility Model Content
[0004] The utility model aims to provide a wet joint structure of a steel-concrete composite bridge without formwork support, so as to solve the problems in the above-mentioned background technology that the casting of joint concrete requires the setting up of support formwork in advance, the operation is complicated, and the welding and binding of steel bars is large and difficult.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a formwork-free steel-concrete composite bridge wet joint structural structure, including a prefabricated bridge deck, a wet joint formed between two adjacent prefabricated bridge decks, the prefabricated bridge decks including a first prefabricated bridge deck and a second prefabricated bridge deck, an H-shaped steel plate is arranged at the wet joint, and the two ends of the H-shaped steel plate are respectively connected to the first prefabricated bridge deck and the second prefabricated bridge deck through bolt connectors, the H-shaped steel plate includes a horizontal portion and two vertical portions, and the horizontal portion is connected between the two vertical portions, the horizontal portion is evenly provided with through grooves along its height direction, and a steel column is formed between two adjacent through grooves.
[0006] Preferably, the first and second annular steel bars are cast inside the first and second prefabricated bridge panels, respectively, and the first and second annular steel bars extend out of the first and second prefabricated bridge panels, respectively, and are inserted into the wet joints, the parts of the first and second annular steel bars inserted into the wet joints are staggered and butted against each other, annular grooves are provided on the first and second annular steel bars, and the steel columns pass through the annular grooves.
[0007] Preferably, longitudinal steel bars are inserted into the annular groove in a direction perpendicular to the annular steel bars.
[0008] Preferably, connection grooves are provided at the connections between the first prefabricated bridge deck and the second prefabricated bridge deck and the H-shaped steel plate.
[0009] Preferably, concrete is poured into the wet joint, and two adjacent prefabricated bridge panels are connected into a whole through the concrete in the wet joint.
[0010] Preferably, the first prefabricated bridge deck and the second prefabricated bridge deck are two prefabricated bridge decks with similar structures, and the first prefabricated bridge deck and the second prefabricated bridge deck are butted against each other.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] (1) The utility model provides an H-shaped steel plate at the wet joint. The H-shaped steel plate and the steel beam are used together as a formwork for casting the wet joint, thereby realizing the formwork-free casting of concrete in the wet joint area, simplifying the operation steps. At the same time, the H-shaped steel plate can also improve the firmness of the connection between the wet joint and the prefabricated bridge deck, thereby improving the performance of the wet joint.
[0013] (2) The utility model provides through grooves on the horizontal and vertical parts of the H-shaped steel plate to form steel columns with equal spacing, and the steel columns are inserted into the annular grooves on the staggered and interlocked annular steel bars. The connection between the two prefabricated bridge panels is achieved through the steel columns and the annular steel bars. At the same time, the above connection method reduces the number of on-site steel bar binding and welding, greatly reduces the construction difficulty, and speeds up the construction speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a top view of the utility model;
[0015] Figure 2 It is a front view of the utility model;
[0016] Figure 3 It is a structural schematic diagram of the first prefabricated bridge deck and the second prefabricated bridge deck of the utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the H-shaped steel plate of the utility model;
[0018] Figure 5 It is a structural schematic diagram of the horizontal and vertical part of the utility model;
[0019] In the figure: 1, wet joint; 2, first precast bridge deck; 3, second precast bridge deck; 4, H-shaped steel plate; 41, horizontal portion; 42, vertical portion; 5, through groove; 6, steel column; 7, first annular reinforcement; 8, second annular reinforcement; 9, annular groove; 10, longitudinal reinforcement; 11, connecting groove; 12, bolt connector. DETAILED DESCRIPTION
[0020] 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.
[0021] See also Figure 1-Figure 5 As shown, the utility model provides the following technical solutions: a formwork-free steel-concrete composite bridge wet joint structure, comprising a prefabricated bridge deck, a wet joint 1 is formed between two adjacent prefabricated bridge decks, the prefabricated bridge deck comprises a first prefabricated bridge deck 2 and a second prefabricated bridge deck 3, an H-shaped steel plate 4 is arranged at the wet joint 1, and the two ends of the H-shaped steel plate 4 are respectively connected to the first prefabricated bridge deck 2 and the second prefabricated bridge deck 3 through bolt connectors 12, the H-shaped steel plate 4 comprises a horizontal portion 41 and two vertical portions 42, and the horizontal portion 41 is connected between the two vertical portions 42, through grooves 5 are uniformly opened on the horizontal portion 41 along its height direction, and a steel column 6 is formed between two adjacent through grooves 5;
[0022] The first precast bridge deck 2 and the second precast bridge deck 3 are respectively cast with the first annular reinforcement 7 and the second annular reinforcement 8, and the first annular reinforcement 7 and the second annular reinforcement 8 extend out of the first precast bridge deck 2 and the second precast bridge deck 3 and are inserted into the wet joint 1, and the parts of the first annular reinforcement 7 and the second annular reinforcement 8 inserted into the wet joint 1 are staggered and butted against each other, and annular grooves 9 are provided on the first annular reinforcement 7 and the second annular reinforcement 8, and the steel column 6 passes through the annular grooves 9.
[0023] Based on the above embodiment, the first annular reinforcement 7 on the first precast bridge deck 2 and the second annular reinforcement 8 on the second precast bridge deck 3 are interlaced and plugged into each other, and then the steel column 6 is passed through the annular grooves 9 on the interlaced and overlapping first annular reinforcement 7 and second annular reinforcement 8, and the first annular reinforcement 7 and the second annular reinforcement 8 are connected by inserting the steel column 6 into the annular grooves 9, thereby realizing the connection between the first precast bridge deck 2 and the second precast bridge deck 3. At the same time, the vertical portion 42 of the H-shaped steel plate 4 and the bottom steel beam are used as a template for wet joint casting, thereby realizing the formwork-free casting of concrete in the wet joint area. At the same time, the H-shaped steel plate 4 can also improve the firmness of the connection between the wet joint and the precast bridge deck, thereby improving the performance of the wet joint.
[0024] like Figure 1 As shown, longitudinal steel bars 10 are inserted into the annular groove 9 in a direction perpendicular to the annular steel bars, and the longitudinal steel bars 10 improve the stress-bearing performance of the wet joint 1.
[0025] like Figure 3 As shown, connection grooves 11 are provided at the connection points between the first prefabricated bridge deck 2 and the second prefabricated bridge deck 3 and the H-shaped steel plate 4. The connection grooves 11 match the vertical portions 42 of the H-shaped steel plate 4, so that the H-shaped steel plate 4 is embedded in the prefabricated bridge deck.
[0026] Furthermore, concrete is poured into the wet joint 1 , and two adjacent prefabricated bridge panels are connected into a whole through the concrete in the wet joint 1 .
[0027] Furthermore, the first prefabricated bridge deck 2 and the second prefabricated bridge deck 3 are two prefabricated bridge decks with similar structures, and the first prefabricated bridge deck 2 and the second prefabricated bridge deck 3 are butt-jointed with each other.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A formwork-free steel-concrete composite bridge wet joint structure, comprising a prefabricated bridge deck, wherein a wet joint (1) is formed between two adjacent prefabricated bridge decks, wherein the prefabricated bridge decks comprise a first prefabricated bridge deck (2) and a second prefabricated bridge deck (3), wherein: An H-shaped steel plate (4) is provided at the wet joint (1), and two ends of the H-shaped steel plate (4) are respectively connected to the first prefabricated bridge deck (2) and the second prefabricated bridge deck (3) through bolt connectors (12). The H-shaped steel plate (4) comprises a horizontal portion (41) and two vertical portions (42), and the horizontal portion (41) is connected between the two vertical portions (42). Through grooves (5) are uniformly provided on the horizontal portion (41) along its height direction, and a steel column (6) is formed between two adjacent through grooves (5).
2. The wet joint structure of a steel-concrete composite bridge without formwork according to claim 1 is characterized by: A first annular steel bar (7) and a second annular steel bar (8) are cast inside the first prefabricated bridge deck (2) and the second prefabricated bridge deck (3), respectively. The first annular steel bar (7) and the second annular steel bar (8) extend out of the first prefabricated bridge deck (2) and the second prefabricated bridge deck (3) and are inserted into the wet joint (1), respectively. The first annular steel bar (7) and the second annular steel bar (8) are inserted into the wet joint (1) in a staggered manner and are interlocked and butted against each other. An annular groove (9) is provided on each of the first annular steel bar (7) and the second annular steel bar (8), and the steel column (6) passes through the annular groove (9).
3. The wet joint structure of a steel-concrete composite bridge without formwork according to claim 2 is characterized by: A longitudinal steel bar (10) is inserted into the annular groove (9) in a direction perpendicular to the annular steel bar.
4. The wet joint structure of a steel-concrete composite bridge without formwork according to claim 1 is characterized by: A connection groove (11) is provided at the connection points between the first prefabricated bridge deck (2) and the second prefabricated bridge deck (3) and the H-shaped steel plate (4).
5. The wet joint structure of a steel-concrete composite bridge without formwork according to claim 1 is characterized by: Concrete is poured into the wet joint (1), and two adjacent prefabricated bridge panels are connected into a whole through the concrete in the wet joint (1).
6. The wet joint structure of a steel-concrete composite bridge without formwork according to claim 1 is characterized by: The first prefabricated bridge deck (2) and the second prefabricated bridge deck (3) are two prefabricated bridge decks with similar structures, and the first prefabricated bridge deck (2) and the second prefabricated bridge deck (3) are butt-jointed with each other.