Steel-concrete combined open full-face pier cap beam post-pouring connecting structure

Abstract

The utility model relates to the technical field of building bridges discloses a kind of steel-mix combined open type full section pier bent cap post-cast connecting structure, including prefabricated bent cap and prefabricated pier column, and the inside of prefabricated bent cap is equipped with open type steel pipe, and open type steel pipe both ends open and extend to prefabricated bent cap top surface and bottom surface position;The inside of prefabricated pier column is equipped with vertical reinforcement, and vertical reinforcement top end extends to pier column top section above, and vertical reinforcement extends into open type steel pipe, and open type steel pipe inside pours concrete;The utility model replaces the combination connection of full section open type with the multiple bellows of distribution, only needs to embed and pier column quantity identical open type steel pipe in bent cap, reduce the quantity of prefabricated bent cap embedded part, and the combination structure of open type steel pipe and vertical reinforcement guarantees the transmission of bent cap internal force, while open type structure also increases the acceptance of positioning error, and large section open type structure is convenient to complete vibration after pouring, and improves post-cast area quality.

Description

Technical Field

[0001] This utility model relates to the field of building bridge technology, and in particular to a post-cast connection structure for a steel-concrete composite open-type full-section bridge pier cap beam. Background Technology

[0002] Precast piers and precast cap beams are common structures in prefabricated bridges. Existing connection methods for linking precast piers and cap beams are generally based on grouting sleeves and corrugated pipes. This method has several problems: the vertical reinforcement bars across the entire top section of the precast pier need to be aligned with their respective sleeves / corrugated pipes, requiring high positioning accuracy and making installation difficult; simultaneously, the small diameter of the sleeves / corrugated pipes on the precast cap beams prevents mechanical vibration, compromising pouring quality; furthermore, the grout outlet holes on the cap beam walls are aesthetically unappealing; and the numerous embedded parts within the cap beams complicate the positioning and pouring of precast components. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a post-cast connection structure for an open-type full-section steel-concrete composite bridge pier cap beam. This connection structure utilizes open-type steel pipes to connect with vertical reinforcing bars, making installation and positioning simple. It can also be mechanically vibrated, eliminating the need for grouting holes on the cap beam wall and requiring fewer embedded parts.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A post-cast connection structure for a steel-concrete composite open-type full-section bridge pier cap beam includes a precast cap beam and a precast pier column. The precast cap beam has an open steel pipe inside, with both ends of the open steel pipe open and extending to the top and bottom surfaces of the precast cap beam. The precast pier has vertical reinforcing bars inside, with the top of the bars extending above the top section of the pier. The vertical reinforcing bars extend into an open steel pipe, which is filled with concrete. As a further implementation, a perforated steel plate is fixed inside the open steel pipe.

[0005] As a further implementation, the perforated steel plate includes a first perforated steel plate and a second perforated steel plate, wherein the first perforated steel plate is transversely welded between the opposite sidewalls of the open steel pipe, and the second perforated steel plate is longitudinally welded between the first perforated steel plate and the sidewalls of the open steel pipe.

[0006] As a further implementation, the length of the vertical reinforcing bars above the top section of the pier column is adapted to the height of the open steel pipe.

[0007] As a further implementation, the dimensions of the top section of the pier column are larger than the cross-sectional dimensions of the open steel pipe; the cross-section of the open steel pipe is rectangular.

[0008] As a further implementation, the number of open steel pipes corresponds to the number of precast piers, and they are arranged coaxially with the precast piers.

[0009] As a further implementation, a steel mesh is arranged inside the precast cap beam.

[0010] As a further implementation, the reinforcing mesh is arranged on the outside of the open steel pipe, and the reinforcing mesh is also welded to the outer side of the open steel pipe.

[0011] As a further implementation, the first perforated steel plate and the second perforated steel plate are evenly distributed inside the open steel pipe.

[0012] As a further implementation, a second perforated steel plate is also provided between the first perforated steel plates.

[0013] The beneficial effects of this utility model are as follows: This invention replaces the distributed multiple corrugated pipes with a full-section open-type combined connection, enabling rapid positioning and installation with low positioning accuracy requirements. Only the same number of open-type steel pipes as the pier columns need to be pre-embedded in the cap beam, reducing the number of pre-embedded parts in the precast cap beam. The combined structure of the open-type steel pipes and vertical reinforcement ensures the transmission of internal forces in the cap beam. Simultaneously, the open structure increases the tolerance for positioning errors. The large-section open-type structure facilitates vibration after pouring, improving the quality of the post-pouring area. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0015] Figure 1 This is a schematic diagram of the post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam in this utility model embodiment; Figure 2 This is a schematic diagram of the prefabricated cap beam skeleton structure in an embodiment of this utility model; Figure 3 This is a schematic diagram of the post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam in an embodiment of this utility model.

[0016] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0017] Among them: 1. Precast cap beam, 2. Open steel pipe, 3. Perforated steel plate, 4. Steel mesh, 5. Concrete, 6. Precast pier column, 31. First perforated steel plate, 32. Second perforated steel plate, 61. Top section of pier column, 62. Vertical reinforcement. Detailed Implementation

[0018] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] Example 1 In a typical embodiment of this utility model, refer to Figures 1-3 As shown, a post-cast connection structure for a steel-concrete composite open-type full-section bridge pier cap beam includes a precast cap beam 1 and a precast pier column 6. An open-type steel pipe 2 is provided inside the precast cap beam 1. The open-type steel pipe 2 is open at both ends and extends to the top and bottom surfaces of the precast cap beam 1.

[0020] The precast pier 6 is provided with vertical reinforcing bars 62 inside, the top of the vertical reinforcing bars 62 extends above the top section 61 of the pier, and the vertical reinforcing bars 62 extend into the open steel pipe 2, and the open steel pipe 2 is filled with concrete 5. like Figure 1 and Figure 2 As shown, a perforated steel plate 3 is fixed inside the open steel pipe 2. In this embodiment, the cross-section of the open steel pipe 2 is rectangular.

[0021] The perforated steel plate 3 corresponds to a rectangular steel plate, which includes multiple first perforated steel plates 31 and second perforated steel plates 32.

[0022] like Figure 2 As shown, a first perforated steel plate is welded transversely between the opposite sidewalls of the open-faced steel pipe, and a second perforated steel plate is welded longitudinally between the first perforated steel plate and the sidewalls of the open-faced steel pipe. Specifically, two sets of the first perforated steel plates are arranged evenly along the length of the precast cap beam, and both sides of the first perforated steel plate are welded and fixed to the left and right inner sidewalls of the open-faced steel pipe. The dimensions of the first perforated steel plate are the same as the dimensions of the front and rear sidewalls of the open-faced steel pipe.

[0023] Multiple sets of the second perforated steel plates 32 are evenly arranged along the width of the precast cap beam. In this embodiment, the second perforated steel plates 32 are arranged between the first perforated steel plate 31 and the front and rear side walls of the open steel pipe 2. Specifically, three sets of second perforated steel plates 32 are evenly distributed between one set of the first perforated steel plate 31 and the front side wall of the open steel pipe 2, and three sets of second perforated steel plates 32 are evenly distributed between another set of the first perforated steel plate 31 and the rear side wall of the open steel pipe 2.

[0024] In a preferred example, a second perforated steel plate is also provided between the two sets of first perforated steel plates.

[0025] By welding different perforated steel plates 3 inside the open steel pipe 2, on the one hand, the integrity of the open steel pipe 2 is improved and the structural strength of the open steel pipe 2 is guaranteed; on the other hand, the setting of perforated steel plates 3 can improve the bonding effect between the vertical steel bars 62 on the precast pier and the post-cast concrete 5, and ensure the connection strength between the precast pier and the precast cap beam.

[0026] In this embodiment, the open-ended steel pipe is open at both ends and extends to the top and bottom surfaces of the precast cap beam. The bottom end of the open-ended steel pipe is flush with the bottom surface of the precast cap beam, while the top end can be slightly lower than or flush with the top surface of the precast cap beam. When the top end is slightly lower than the top surface of the precast cap beam, the top of the assembled precast cap beam can be smoothed with concrete.

[0027] It is understandable that the internal space of the open steel pipe is used for the vertical reinforcement bars to be inserted when the precast cap beam is hoisted onto the precast pier. Therefore, the number of open steel pipes 2 corresponds to the number of precast piers 6 and is arranged coaxially with the precast piers. All the vertical reinforcement bars 62 at the top of the top section 61 of each group of precast piers 6 can be inserted into the open steel pipes 2.

[0028] It is understandable that the vertical reinforcing bars 62 at the top of the pier column section 61 are reserved with a set length during the prefabrication of the pier column. The lower end of the vertical reinforcing bars 62 is embedded inside the pier column, and the reserved length at the top of the vertical reinforcing bars 62 is not higher than the height of the open steel pipe, so as to prevent the top of the vertical reinforcing bars 62 from being higher than the open steel pipe.

[0029] The dimensions of the top section 61 of the pier column are larger than the cross-sectional dimensions of the open steel pipe 2, ensuring that the precast cap beam can be smoothly hoisted onto the precast pier column and supported by the top section 61 of the pier column. The vertical reinforcing bars 62 are all set parallel to the perforated steel plate 3.

[0030] like Figure 2 As shown, a reinforcing mesh 4 is arranged inside the precast cap beam 1. The reinforcing mesh 4 forms the skeleton structure of the precast cap beam 1 and can be arranged according to the specific requirements of the precast cap beam. It should be noted that the reinforcing mesh cannot enter the open steel pipe 2. Therefore, the reinforcing mesh is arranged on the outside of the open steel pipe, and some of the reinforcing bars of the mesh are welded to the outer side of the open steel pipe to maintain integrity.

[0031] During installation, the precast cap beam 1 is hoisted to a suitable position, and the lower opening of the open steel pipe 2 is aligned with the vertical reinforcing bar 62. Then, the precast cap beam 1 is lowered so that it is supported by the top section 61 of the pier column. Then, the pier column and the cap beam are fixed with a temporary device, which is an existing technology.

[0032] Then, concrete 5 is poured into the open steel pipe 2. The concrete 5 is made of high-strength concrete or ultra-high performance concrete (UHPC). Since the opening of the open steel pipe 2 is large, the concrete can be mechanically vibrated to improve the pouring quality. After the post-poured material has solidified, the temporary fixing device can be removed to complete the prefabricated connection of the precast pier and the precast cap beam.

[0033] This embodiment replaces the distributed multiple corrugated pipes with a combined connection of full-section open sections. Only the same number of open steel pipes as the piers need to be pre-embedded in the cap beam, reducing the number of pre-embedded parts in the precast cap beam. The combined structure of open steel pipes and vertical reinforcement ensures the transmission of internal forces in the cap beam. At the same time, the open structure also increases the tolerance for positioning errors. The large-section open structure facilitates vibration after pouring, improving the quality of the post-pouring area.

[0034] The connection structure proposed in this embodiment adopts a full-section connection and a large-section open structure, thus reducing the requirements for rebar positioning and supporting the use of specialized equipment such as vibrators for compaction, ensuring the pouring quality of the post-cast strip. At the same time, the steel pipe has a good restraining effect on post-cast concrete, UHPC and other materials, which can improve the deformation capacity and toughness of the joint area under extreme working conditions.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A post-cast connection structure for an open-type full-section steel-concrete composite bridge pier cap beam, characterized in that, It includes precast cap beams and precast piers. The precast cap beams have open steel pipes inside, which are open at both ends and extend to the top and bottom surfaces of the precast cap beams. The precast pier has vertical reinforcing bars inside, with the top of the bars extending above the top section of the pier. The vertical reinforcing bars extend into an open steel pipe, which is filled with concrete.

2. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 1, characterized in that, The open-type steel pipe has a perforated steel plate fixed inside.

3. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 2, characterized in that, The perforated steel plate includes a first perforated steel plate and a second perforated steel plate. The first perforated steel plate is welded laterally between the opposite sidewalls of the open steel pipe, and the second perforated steel plate is welded longitudinally between the first perforated steel plate and the sidewall of the open steel pipe.

4. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 1, characterized in that, The length of the vertical reinforcing bars above the top section of the pier column is adapted to the height of the open steel pipe.

5. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 4, characterized in that, The dimensions of the top section of the pier column are larger than the cross-sectional dimensions of the open steel pipe; the cross-section of the open steel pipe is rectangular.

6. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 1, characterized in that, The number of open steel pipes corresponds to the number of precast piers, and they are arranged coaxially with the precast piers.

7. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 3, characterized in that, The precast cap beam is equipped with a steel mesh.

8. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 7, characterized in that, The reinforcing mesh is arranged on the outside of the open steel pipe, and the reinforcing mesh is also welded to the outer side of the open steel pipe.

9. The post-cast connection structure of the steel-concrete composite open-type full-section bridge pier cap beam according to claim 3, characterized in that, The first perforated steel plate and the second perforated steel plate are evenly distributed inside the open steel pipe.

10. The post-cast connection structure of a steel-concrete composite open-type full-section bridge pier cap beam according to claim 9, characterized in that, A second perforated steel plate is also provided between the first perforated steel plates.

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