Concrete-filled steel tube pier and steel box girder connecting structure with reinforcing structure

Abstract

The utility model belongs to the technical field of reinforced concrete bridges, and particularly relates to a concrete filled steel tube pier and steel box girder connecting structure with a reinforcing structure. The utility model provides a concrete filled steel tube bridge pier and steel box girder connecting structure with a reinforcing structure, which is characterized in that a bridge pier steel tube is provided with a girder bottom plate, a girder top plate, a steel box girder vertical plate, a bottom plate connecting hole, a concrete block, a mounting groove and a reinforcing steel plate unit, so that the reinforcing steel plate unit can be connected with concrete inside and outside the bridge pier steel tube; the connection strength between the bridge pier and the steel box girder is remarkably improved, and the integrity and stability of the connection structure are better.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel-concrete bridges, and in particular relates to a connection structure between a steel tube concrete bridge pier and a steel box beam with a reinforced structure. Background Art

[0002] Concrete-filled steel tube bridge piers are composed primarily of an outer steel tube and inner concrete. Therefore, these piers combine the tensile strengths of steel with the compressive strengths of concrete.

[0003] In addition, steel box girder generally refers to a box-shaped beam made of welded steel plates, which is mainly used in bridges with larger spans.

[0004] The common existing connection structure between the above-mentioned steel tube concrete bridge piers and steel box girders is mainly as follows: a hole is first opened on the bottom plate of the steel box girder, the former bridge pier is then inserted into the hole, and finally the two are welded and / or concreted to achieve the basic connection strength between the bridge pier and the steel box girder.

[0005] For example, the Chinese utility model patent with authorization announcement number CN216615467U and authorization announcement date 2022.05.27 discloses a steel box girder pedestrian bridge pier-beam consolidation connection structure, including a steel box girder, a supporting cross diaphragm, a steel pier column and a stiffening plate. The steel box girder and the steel pier column are welded at the connection node to form a pier-beam consolidation rigid connection node. The steel pier column reinforced with a stiffening plate at the pier-beam consolidation rigid connection node extends into the steel box girder, forming a pier-beam consolidation force system with the supporting cross diaphragm, the steel box girder top plate and the steel box girder bottom plate.

[0006] The connection structure in this utility model patent has the following general advantages: improved connection stiffness between the upper and lower parts of the bridge, simple connection structure, fast on-site construction speed, and strong practicality.

[0007] However, in actual use, this connection structure still has at least the following shortcomings, which are also the technical problems to be solved by the present utility model, namely:

[0008] When this connection structure is used in the steel-concrete combined connection method, the concrete structures inside and outside the steel pipe are relatively independent, and the effective connection area inside and outside the steel pipe is relatively small. Therefore, the connection strength is relatively low, and it is difficult to maintain sufficient connection stability between the bridge pier and the steel box girder for a long time.

[0009] Therefore, in summary, there is an urgent need for a stable connection structure between the pier and steel box girder with a reinforced structure between the inner and outer concrete of the pier steel pipe and an additional connection method. Utility Model Content

[0010] The utility model provides a connection structure between a steel tube concrete bridge pier and a steel box girder with a reinforced structure. By arranging a beam bottom plate, a beam top plate, a steel box girder vertical plate, a bottom plate connection hole, a concrete block, an installation groove, and a reinforced steel plate unit on the bridge pier steel tube, the reinforced steel plate unit can be connected to the concrete inside and outside the bridge pier steel tube, so that the connection strength between the bridge pier and the steel box girder is significantly improved, and the integrity and stability of the connection structure are better.

[0011] The technical solution adopted by the present invention to solve the above-mentioned problems is: a steel tube concrete bridge pier and steel box beam connection structure with a reinforced structure, including a beam bottom plate, a beam top plate, a steel box beam vertical plate, a bottom plate connection hole, and a pier steel pipe, and also includes a concrete block arranged in the pier steel pipe and on the beam bottom plate, an installation groove opened downward from the lower end surface of the pier steel pipe, and a reinforced steel plate unit arranged on the installation groove and connected to the concrete block.

[0012] A further preferred technical solution is that: the number of the installation slots is 4, the number of the reinforcement steel plate units is 2, and the reinforcement steel plate units are arranged on two pairs of the installation slots.

[0013] A further preferred technical solution is that the reinforced steel plate unit includes a horizontal plate inserted into the installation groove, and a vertical plate arranged on the horizontal plate and located in the pier steel pipe.

[0014] A further preferred technical solution is that the reinforced steel plate unit further includes shear studs arranged on the horizontal plate and the vertical plate.

[0015] A further preferred technical solution is that vertical steel bars are provided in the pier steel pipe.

[0016] A further preferred technical solution is that a reinforcing steel plate for connecting the vertical steel bars is further provided on the inner annular surface of the pier steel pipe.

[0017] A further preferred technical solution is that: a stiffening rib plate for connecting to the beam bottom plate is further provided on the outer annular surface of the pier steel pipe.

[0018] A further preferred technical solution is that: weld reinforcement plates for connecting to the outer annular surface of the pier steel pipe are provided on both vertical side surfaces of the transverse plate.

[0019] A further preferred technical solution is that the bottom surface height of the installation groove is higher than or equal to the upper surface height of the beam bottom plate.

[0020] A further preferred technical solution is that the concrete blocks include pre-cast concrete blocks arranged in the pier steel pipes, and post-cast concrete blocks arranged in the pier steel pipes and on the beam bottom plates, and the reinforcing steel plate units are arranged in the post-cast concrete blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 This is a schematic diagram of the positions of the connection holes in the bottom plate of the present invention.

[0023] Figure 3 This is a schematic diagram of the position of the reinforced steel plate unit in the present invention from a top view.

[0024] Figure 4 This is a schematic structural diagram of the reinforced steel plate unit in the present invention.

[0025] Figure 5 This is a schematic diagram of the position of the installation slot in the present utility model.

[0026] Figure 6 This is a schematic diagram of the shape of the installation groove in the present invention.

[0027] Figure 7 This is a schematic diagram of the position of the vertical steel bars in the present invention from a top view.

[0028] Figure 8 This is a schematic diagram of the position of the weld reinforcement plate in the present invention.

[0029] In the figure, the meanings of the marks are as follows:

[0030] Weld a;

[0031] Beam bottom plate 11, beam top plate 12, steel box beam vertical plate 13, bottom plate connection hole 14, pier steel pipe 15;

[0032] Concrete block 2, installation groove 3, reinforced steel plate unit 4, vertical steel bar 5, reinforcement steel plate 6, stiffening rib plate 7, weld reinforcement plate 8;

[0033] Horizontal plate 401, vertical plate 402, shear studs 403. DETAILED DESCRIPTION

[0034] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0035] As attached Figure 1-8As shown, a steel tube concrete pier and steel box girder connection structure with a reinforced structure includes a beam bottom plate 11, a beam top plate 12, a steel box girder vertical plate 13, a bottom plate connection hole 14, and a pier steel tube 15. It also includes a concrete block 2 arranged in the pier steel tube 15 and on the beam bottom plate 11, an installation groove 3 opened downward from the lower end surface of the pier steel tube 15, and a reinforcing steel plate unit 4 arranged on the installation groove 3 and connected to the concrete block 2.

[0036] In this embodiment, the upper end of the pier steel pipe 15 is inserted into the base plate connection hole 14, leaving a "channel" for concrete flow between the upper end and the beam top plate 12, ensuring that the concrete block 2 is ultimately formed into a single piece. Specifically, the concrete block 2 generally has the shape of a "rectangular upper block and cylindrical lower block."

[0037] The CFST piers primarily refer to the pier steel tubes 15 and the corresponding concrete blocks 2 within their interiors, while the steel box girders primarily refer to the beam bottom plate 11, beam top plate 12, and steel box girder risers 13. At this point, the CFST piers and steel box girders already possess the following three basic connection properties:

[0038] First, the steel tube concrete pier is connected to the bottom plate connection hole 14;

[0039] Second, the concrete block 2 is cast as a whole, and the pier steel pipe 15 and the steel box beam are cast at the same time;

[0040] Third, the upper end of the pier steel pipe 15 is inserted into the “upper rectangular parallelepiped” area of the concrete block 2 .

[0041] The combined use of the installation groove 3 and the reinforced steel plate unit 4 can further improve the connection strength and stability between the steel tube concrete pier and the steel box girder, which is mainly manifested in the following aspects:

[0042] The reinforced steel plate unit 4 serves as an outward protruding structure of the pier steel pipe 15, making the plug-in relationship between the pier steel pipe 15 and the "upper rectangular parallelepiped" area of the concrete block 2 more complex and the plug-in structure more three-dimensional, thereby ensuring that the pier steel pipe 15, the concrete block 2 and the steel box girder are stably combined to form a solid overall structure.

[0043] The number of the mounting grooves 3 is four, the number of the reinforcement steel plate units 4 is two, and the reinforcement steel plate units 4 are arranged on two pairs of the mounting grooves 3 .

[0044] In this embodiment, the two reinforcing steel plate units 4 are parallel to each other and are respectively located on both sides of the center of the cross section of the pier steel pipe 15 , thereby fully and symmetrically connecting and reinforcing the pier steel pipe 15 on the concrete block 2 .

[0045] In addition, the two mounting grooves 3 in a pair have groove side surfaces and groove bottom surfaces that are aligned and overlap.

[0046] The reinforced steel plate unit 4 includes a horizontal plate 401 inserted into the installation groove 3 , and a vertical plate 402 disposed on the horizontal plate 401 and located in the pier steel pipe 15 .

[0047] In this embodiment, the general shape of the reinforced steel plate unit 4 is "T-shaped", and the horizontal plate 401 and the vertical plate 402 are integrally formed and made of steel plates. The former is mainly used to insert the concrete block 2 and engage the pier steel pipe 15, while the latter is mainly used to reinforce the former, so that the horizontal plate 401 has a greater fixing strength in the concrete area inside the pier steel pipe 15, and thus the concrete block 2 and the pier steel pipe 15 can be combined and connected together with higher strength.

[0048] The reinforced steel plate unit 4 further includes shear studs 403 arranged on the horizontal plate 401 and the vertical plate 402 .

[0049] In this embodiment, the shear studs 403 are provided on both the inner and outer areas of the transverse plate 401 located at the pier steel pipe 15 , thereby reinforcing the connection between the concrete block 2 and the reinforced steel plate unit 4 itself.

[0050] Vertical steel bars 5 are provided in the pier steel pipe 15 .

[0051] In this embodiment, the vertical steel bars 5 are used to properly reinforce the concrete block 2, especially to enhance the concrete strength of the portion located within the pier steel tube 15. The vertical steel bars 5 can be located between the two reinforcing steel plate units 4 or on the relatively outer sides.

[0052] On the other hand, the upper end of the vertical steel bar 5 can appropriately protrude to the outside above the pier steel pipe 15 as long as it does not affect the installation of the beam top plate 12.

[0053] A reinforcement steel plate 6 for connecting the vertical steel bars 5 is further provided on the inner annular surface of the pier steel pipe 15 .

[0054] In this embodiment, the reinforcing steel plate 6 is reinforced: the integral pier structure composed of the pier steel pipe 15, the concrete inside the pipe, and the vertical steel bars 5 makes the steel tube concrete pier structure itself stable, so as to obtain the above-mentioned connection structure with greater bonding strength and longer effective service life.

[0055] The outer annular surface of the pier steel pipe 15 is further provided with a stiffening rib 7 for connecting to the beam bottom plate 11 .

[0056] In this embodiment, the number of the stiffening ribs 7 is 2-4, which are evenly spaced in the circumferential direction and have a right triangle shape. The two right-angled sides are welded to the outer annular surface of the pier steel pipe 15 and the lower surface of the beam bottom plate 11 respectively.

[0057] The two vertical side surfaces of the transverse plate 401 are provided with weld reinforcement plates 8 for connecting to the outer annular surface of the pier steel pipe 15 .

[0058] In this embodiment, the main function of the weld reinforcement plate 8 is to improve the original difficult welding and small effective welding area between the horizontal plate 401 and the mounting groove 3 to a relatively outward, easy to weld, and reinforced connection method that can be welded in multiple places and in large areas.

[0059] The bottom surface height of the mounting groove 3 is higher than or equal to the upper surface height of the beam bottom plate 11 .

[0060] In this embodiment, the installation groove 3 needs to be completely located in the steel box girder, otherwise the installation groove 3 and the bottom plate connection hole 14 are connected, and concrete is easily leaked there, which is not conducive to the stable construction and forming of the above-mentioned connection structure.

[0061] The concrete blocks 2 include pre-cast concrete blocks disposed in the pier steel pipes 15 and post-cast concrete blocks disposed in the pier steel pipes 15 and on the beam bottom plate 11 . The reinforcing steel plate units 4 are disposed in the post-cast concrete blocks.

[0062] In this embodiment, the pre-cast concrete blocks and the pier steel pipes 15 can be prefabricated in a factory, thereby reducing the construction workload of the post-cast concrete blocks and shortening the construction period of the connection structure.

[0063] The reinforced steel plate unit 4 is entirely located within the post-cast concrete block, and the concrete portion within the pier steel pipe 15 includes all pre-cast concrete blocks and some post-cast concrete blocks. Figure 1 .

[0064] Finally, the upper end height of the vertical steel bar 5 is higher than the upper surface height of the pre-cast concrete block, so that it can connect the pre-cast concrete block and the post-cast concrete block, thereby strengthening the structural strength of the concrete block 2 and the entire connection structure, so that the bridge pier and the steel box girder are firmly connected.

[0065] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A steel tube concrete bridge pier and steel box beam connection structure with a reinforced structure, comprising a beam bottom plate (11), a beam top plate (12), a steel box beam vertical plate (13), a bottom plate connection hole (14), and a bridge pier steel pipe (15), characterized in that: It also includes a concrete block (2) arranged in the pier steel pipe (15) and on the beam bottom plate (11), a mounting groove (3) opened downward from the lower end surface of the pier steel pipe (15), and a reinforcing steel plate unit (4) arranged on the mounting groove (3) and connected to the concrete block (2).

2. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 1, characterized in that: The number of the mounting grooves (3) is four, the number of the reinforcement steel plate units (4) is two, and the reinforcement steel plate units (4) are arranged on two paired mounting grooves (3).

3. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 1, characterized in that: The reinforced steel plate unit (4) comprises a horizontal plate (401) inserted into the installation groove (3), and a vertical plate (402) arranged on the horizontal plate (401) and located in the pier steel pipe (15).

4. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 3, characterized in that: The reinforced steel plate unit (4) further comprises shear studs (403) arranged on the transverse plate (401) and the vertical plate (402).

5. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 1, characterized in that: Vertical steel bars (5) are provided in the pier steel pipe (15).

6. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 5, characterized in that: A reinforcing steel plate (6) for connecting the vertical steel bars (5) is also provided on the inner annular surface of the pier steel pipe (15).

7. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 1, characterized in that: A stiffening rib plate (7) for connecting to the beam bottom plate (11) is also provided on the outer annular surface of the pier steel pipe (15).

8. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 3, characterized in that: Both vertical side surfaces of the transverse plate (401) are provided with weld reinforcement plates (8) for connecting to the outer annular surface of the pier steel pipe (15).

9. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 1, characterized in that: The bottom surface height of the installation groove (3) is higher than or equal to the top surface height of the beam bottom plate (11).

10. The connection structure of a reinforced concrete-filled steel tube bridge pier and a steel box girder according to claim 1, characterized in that: The concrete block (2) comprises a pre-cast concrete block arranged in the pier steel pipe (15), and a post-cast concrete block arranged in the pier steel pipe (15) and on the beam bottom plate (11), and the reinforced steel plate unit (4) is arranged in the post-cast concrete block.

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