Small box girder rib plate spherical hinge type connecting structure and construction method thereof

Abstract

The application discloses a small box girder rib plate spherical hinge type connecting structure, which comprises a small box girder, embedded parts are arranged on the inclined edge sides of the small box girder, a truss is arranged between the opposite embedded parts, left and right parts of the truss are fixedly connected with inclined steel beams, and the embedded parts are connected with the inclined steel beams through spherical hinge assemblies. The small box girder rib plate spherical hinge type connecting structure has the beneficial effects that: no transverse partition plate is arranged when the small box girder is prefabricated, a steel plate is embedded at the position, the inclined steel beams are connected through the spherical hinge at the embedded steel plate after being installed, the inclined steel beams are fixedly connected with the truss, non-rigid connection between the two adjacent small box girders is realized, the structure is straight and beautiful through the whole truss, reliable support of the truss between the box girders is ensured through the spherical hinge assembly, the spherical hinge assembly can disperse local stress, and the overall stress stability is ensured.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to a ball-and-socket connection structure for rib plates of small box girders and its construction method. Background Technology

[0002] The existing box girder connecting diaphragms in bridge construction are all made of concrete. The concrete structure is not straight, affecting aesthetics. Furthermore, the existing concrete diaphragms are a fixed, monolithic structure, which is rigid and negatively impacts installation, construction, and subsequent stress distribution. Therefore, designing an aesthetically pleasing and reliably connected box girder connection structure is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] The purpose of this invention is to provide a ball-joint connection structure for small box girder ribs and its construction method, which solves the problems of rigidity and non-straightness of existing concrete diaphragm structures.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A ball-joint connection structure for a small box girder rib includes a small box girder, with embedded parts on the inclined side of the small box girder, and a truss between the opposite embedded parts. The left and right parts of the truss are fixedly connected to inclined steel beams, and the embedded parts are connected to the inclined steel beams through a ball-joint assembly.

[0006] Furthermore, the embedded part is an embedded steel plate.

[0007] Furthermore, the outer surface of the embedded part is flush with the outer surface of the inclined side of the small box girder.

[0008] Furthermore, the embedded parts include an upper embedded part and a lower embedded part, and the ball joint assembly includes an upper ball joint assembly and a lower ball joint assembly. The upper embedded part is connected to the upper part of the inclined steel beam through the upper ball joint assembly, and the lower embedded part is connected to the lower part of the inclined steel beam through the lower ball joint assembly.

[0009] Furthermore, the ball joint assembly includes a ball joint seat and a ball joint rod, with the ball joint seat and the ball joint rod forming a ball joint fit. The ball joint seat is fixed on the embedded part, and the ball joint rod is fixed on the inclined steel beam.

[0010] Furthermore, the truss includes an upper frame rod, a lower frame rod, a vertical frame rod, a left diagonal rod, and a right diagonal rod. The middle part of the upper frame rod is connected to the middle part of the lower frame rod, the middle part of the upper frame rod is connected to the left part of the lower frame rod, and the middle part of the upper frame rod is connected to the right part of the lower frame rod.

[0011] Furthermore, the inclined steel beam includes a left inclined steel beam and a right inclined steel beam. The upper and lower parts of the left inclined steel beam are respectively connected to the upper left and lower left parts of the truss, and the upper and lower parts of the right inclined steel beam are respectively connected to the upper right and lower right parts of the truss.

[0012] Furthermore, the ball joint assembly also includes an adjusting screw and an adjusting nut. The adjusting screw is connected to the ball joint rod, and the adjusting screw and the adjusting nut are threaded together. The adjusting nut is fixed to the truss.

[0013] Furthermore, wet joints are provided between the small box girders.

[0014] A construction method for a small box girder rib plate ball hinge connection structure, using the above-mentioned small box girder rib plate ball hinge connection structure, includes the following steps:

[0015] Step a: During the manufacturing of the small box girder, embedded parts are installed, and the laitance of the embedded parts is cleaned after demolding.

[0016] Step b: Connect the truss to the inclined steel beam to form an integral connection structure;

[0017] Step c: After the small box girder is installed in place, the connection structure formed by the truss and the inclined steel beam is set between the corresponding embedded parts;

[0018] Step d: Connect the inclined steel beam to the embedded parts using a ball joint assembly, and connect the adjacent small box beams into an integral structure.

[0019] The beneficial effects of this invention are as follows: no transverse diaphragms are set during the prefabrication of the small box girders, but steel plates are pre-embedded at the positions. After installation, the inclined steel beams are connected by ball joints at the pre-embedded steel plates. The inclined steel beams are connected by fixed trusses, which realizes a non-rigid connection between two adjacent small box girders. The integral truss ensures that the structure is straight and beautiful. The ball joint assembly ensures reliable support of the truss between the box girders. Moreover, the ball joint assembly can disperse local stress and ensure overall stress stability.

[0020] The aforementioned main solution of the present invention and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed by the present invention; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding the solution of the present invention, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected by the present invention, and will not be exhaustively listed here. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0023] Figure 3 This is a magnified view of a portion of the ball joint assembly.

[0024] In the diagram: 1-Small box girder, 2-Embedded part, 3-Truss, 4-Spherical hinge assembly, 5-Inclined steel beam, 6-Wet joint, 7-Upper embedded part, 8-Lower embedded part, 9-Upper spherical hinge assembly, 10-Lower spherical hinge assembly, 11-Spherical hinge seat, 12-Ball head rod, 13-Upper frame rod, 14-Lower frame rod, 15-Vertical frame rod, 16-Left inclined rod, 17-Right inclined rod, 18-Left inclined steel beam, 19-Right inclined steel beam, 20-Adjusting screw, 21-Adjusting nut. Detailed Implementation

[0025] The following non-limiting examples are used to illustrate the present invention.

[0026] Example 1:

[0027] refer to Figures 1-3 As shown, a small box girder rib plate ball hinge connection structure includes a small box girder 1, an embedded part 2, a truss 3, a ball hinge assembly 4, a diagonal steel beam 5, and a wet joint 6.

[0028] Small box girder 1 is a precast reinforced concrete structure, which is hoisted onto the cap beam during construction.

[0029] The inclined side of the small box girder 1 is provided with a pre-embedded part 2. The pre-embedded part 2 is pre-embedded during the casting of the small box girder 1, and the ball joint assembly 4 is fixedly installed by using the pre-embedded part 2.

[0030] Embedded part 2 is a pre-embedded steel plate, and its outer surface is flush with the outer surface of the inclined side of the small box girder 1. This allows for both casting and fixing of embedded part 2 within the small box girder 1 and exposing it for connection. An embedded rod is fixed to embedded part 2 and embedded within the small box girder 1, which enhances the anchorage strength of embedded part 2 on the small box girder 1.

[0031] A truss 3 is provided between the corresponding embedded parts 2, forming a span-supporting structure. The truss 3 provides reliable support strength between the two small box beams 1. Moreover, the truss 3 is an integral structure, which not only provides good support but also has the advantages of beautiful appearance and straight structure.

[0032] The left and right sides of the truss 3 are fixedly connected to the inclined steel beams 5, forming a fixed frame that supports the small box girder 1. The embedded part 2 is connected to the inclined steel beam 5 through the ball joint assembly 4. The ball joint assembly 4 can transmit the force between the embedded part 2 and the inclined steel beam 5, and can also slightly change the direction of the force to avoid excessive stress on the internal inclined steel beam 5 and truss 3. At the same time, it can overcome the problem of positional offset error of the small box girder 1 during installation.

[0033] The truss 3 includes an upper frame rod 13, a lower frame rod 14, a vertical frame rod 15, a left diagonal rod 16, and a right diagonal rod 17 welded together. The vertical frame rod 15 is connected between the middle of the upper frame rod 13 and the middle of the lower frame rod 14. The left diagonal rod 16 is connected between the middle of the upper frame rod 13 and the left part of the lower frame rod 14. The right diagonal rod 17 is connected between the middle of the upper frame rod 13 and the right part of the lower frame rod 14, thus forming a support frame that is stable under stress and has a reliable structure.

[0034] The inclined steel beam 5 includes a left inclined steel beam 18 and a right inclined steel beam 19. The upper and lower parts of the left inclined steel beam 18 are welded to the left part of the upper frame rod 13 and the left part of the lower frame rod 14, respectively. The upper and lower parts of the right inclined steel beam 19 are connected to the right part of the upper frame rod 13 and the right part of the lower frame rod 14, respectively. By using the left and right inclined steel beams, the ball joint assembly 4 is provided for the left and right parts of the truss 3, and the overall strength can be further enhanced.

[0035] The ball joint assembly 4 includes a ball joint seat 11, a ball head rod 12, an adjusting screw 20, and an adjusting nut 21. The ball joint seat 11 and the ball head rod 12 form a ball joint fit. The ball joint seat 11 is fixed on the embedded part 2, and the ball head rod 12 is fixed on the inclined steel beam 5, thereby realizing the ball joint fit between the embedded part 2 and the inclined steel beam 5.

[0036] The adjusting screw 20 is fixedly connected to the ball head rod 12. The adjusting screw 20 is threadedly engaged with the adjusting nut 21, which is fixed on the truss 3. Since there may be errors in the distance between two adjacent small box beams 1, the adjusting screw 20 is rotated to change the extension length of the ball head rod relative to the inclined steel beam 5, so as to adapt to different installation distances and compensate the position of the ball joint assembly 4.

[0037] The embedded part 2 includes an upper embedded part 7 and a lower embedded part 8. The ball joint assembly 4 includes an upper ball joint assembly 9 and a lower ball joint assembly 10. The upper embedded part 7 is connected to the upper part of the inclined steel beam 5 through the upper ball joint assembly 9, and the lower embedded part 8 is connected to the lower part of the inclined steel beam 5 through the lower ball joint assembly 10. The ball joint connection at the four corners of the overall frame is achieved through two embedded parts 2 on each side and two ball joint assemblies 4 on the left and right.

[0038] Wet joints 6 are provided between the small box girders 1, that is, the small box girders are connected into a whole by cast-in-place concrete to form a complete construction surface on the bridge.

[0039] Example 2

[0040] A construction method for a small box girder rib plate ball hinge connection structure, using the small box girder rib plate ball hinge connection structure of Example 1, includes the following steps:

[0041] Step a: During the manufacturing of the small box girder 1, embedded parts 2 are installed. After demolding, the laitance of the embedded parts is cleaned.

[0042] Step b: Connect truss 3 to inclined steel beam 5 to form an integral connection structure.

[0043] Step c: After the small box girder 1 is installed in place, the connection structure formed by the truss 3 and the inclined steel beam 5 is set between the corresponding embedded parts 2.

[0044] Step d: Connect the inclined steel beam 5 to the embedded part 2 using the ball joint assembly 4, thus connecting the adjacent small box beams 1 into a whole structure. If there is a discrepancy between the installation dimensions of the ball joint assembly 4 and the actual dimensions, the extension length of the ball head rod 12 can be changed by rotating the adjusting screw 20 to suit the actual installation requirements.

[0045] The foregoing basic examples and their further alternative examples of the present invention can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed by the present invention. In the present invention, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ball-and-socket joint structure for a small box girder rib plate, comprising a small box girder (1), characterized in that: The small box girder (1) is provided with embedded parts (2) on the inclined side, and a truss (3) is provided between the opposite embedded parts (2). The left and right sides of the truss (3) are fixedly connected to the inclined steel beam (5). The embedded parts (2) are connected to the inclined steel beam (5) through the ball joint assembly (4). The embedded part (2) includes an upper embedded part (7) and a lower embedded part (8), and the ball joint assembly (4) includes an upper ball joint assembly (9) and a lower ball joint assembly (10). The upper embedded part (7) is connected to the upper part of the inclined steel beam (5) through the upper ball joint assembly (9), and the lower embedded part (8) is connected to the lower part of the inclined steel beam (5) through the lower ball joint assembly (10). The ball joint assembly (4) includes a ball joint seat (11) and a ball head rod (12). The ball joint seat (11) and the ball head rod (12) form a ball joint fit. The ball joint seat (11) is fixed on the embedded part (2), and the ball head rod (12) is fixed on the inclined steel beam (5). The truss (3) includes an upper frame rod (13), a lower frame rod (14), a vertical frame rod (15), a left diagonal rod (16), and a right diagonal rod (17). The vertical frame rod (15) is connected between the middle part of the upper frame rod (13) and the middle part of the lower frame rod (14). The left diagonal rod (16) is connected between the middle part of the upper frame rod (13) and the left part of the lower frame rod (14). The right diagonal rod (17) is connected between the middle part of the upper frame rod (13) and the right part of the lower frame rod (14). The inclined steel beam (5) includes a left inclined steel beam (18) and a right inclined steel beam (19). The upper and lower parts of the left inclined steel beam (18) are connected to the upper left and lower left parts of the truss (3) respectively, and the upper and lower parts of the right inclined steel beam (19) are connected to the upper right and lower right parts of the truss (3) respectively. The ball joint assembly (4) further includes an adjusting screw (20) and an adjusting nut (21). The adjusting screw (20) is connected to the ball head rod (12), and the adjusting screw (20) and the adjusting nut (21) are threaded together. The adjusting nut (21) is fixed on the truss (3).

2. The ball-and-socket connection structure for the rib plate of the small box girder according to claim 1, characterized in that: The embedded part (2) is an embedded steel plate.

3. The ball-joint connection structure for the rib plate of the small box girder according to claim 1 or 2, characterized in that: The outer surface of the embedded part (2) is flush with the outer surface of the inclined side of the small box girder (1).

4. The ball-and-socket connection structure for the rib plate of the small box girder according to claim 1, characterized in that: The small box girders (1) are provided with wet joints (6).

5. A construction method for a small box girder rib plate ball-joint connection structure, employing the small box girder rib plate ball-joint connection structure as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Step a, during the manufacturing of the small box girder (1), embedded parts (2) are installed, and the floating slurry of the embedded parts is cleaned after the formwork is removed; Step b, connect the truss (3) with the inclined steel beam (5) to form an integral connection structure; Step c, after the small box girder (1) is installed in place, the connection structure formed by the truss (3) and the inclined steel beam (5) is set between the corresponding embedded parts (2); In step d, the inclined steel beam (5) is connected to the embedded part (2) by the ball joint assembly (4), and the adjacent small box beams (1) are connected into an integral structure.

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