Beam-arch combined system bridge structure and jacking and rotating construction method

Abstract

The application belongs to the technical field of bridge construction, and provides a beam-arch combined system bridge structure and a jacking and rotating construction method, wherein the beam-arch combined system bridge structure comprises a bridge substructure, a main beam, a bridge arch structure, an arch foot cross beam, a rotating device and a temporary lengthening cross beam; the main beam is connected with the bridge substructure, the arch foot cross beam is arranged at the connection position of the main beam and the bridge substructure, and the two ends of the arch foot cross beam extend from the two sides of the main beam; the temporary lengthening cross beam is detachably connected with the arch foot cross beam; the rotating device is in sliding cooperation with the temporary lengthening cross beam, and the bridge arch structure is detachably hinged to the rotating device. The structure and construction steps of the application are reasonable in design, can enable the bridge arch structure to complete the transverse rotating construction of the arch when the bridge deck is narrow, and the method is convenient in construction steps and has great application prospect.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to a beam-arch composite bridge structure and a method for jacking and rotating construction. Background Technology

[0002] Composite bridge systems refer to bridges whose main load-bearing components are composed of two independent structural systems, such as a combination of arch and beam, or a combination of beam and truss. A beam-arch composite bridge specifically refers to a bridge where the main load-bearing components are composed of both arch and beam structures. Beam-arch composite systems have developed rapidly in my country in recent years, and due to their rational stress distribution, low cost, convenient construction, and aesthetically pleasing appearance, they are widely used in highway construction. These composite bridges generally employ a "beam-first, arch-later" construction method. This involves completing the main beam construction, then assembling the arch ribs using scaffolding erected on the beam, or assembling the arch ribs using partial scaffolding and then vertically rotating and closing the arch ribs using a tower. This traditional construction method results in long assembly times and numerous loose parts at the bridge site, posing safety hazards to the underpass.

[0003] Traditional arch bridge rotation construction methods can be categorized based on the direction of rotation: vertical rotation, horizontal rotation, and a combination of both. Vertical rotation typically involves pouring or assembling the arch ribs at a lower location, then lifting them to the designed position before closure. Horizontal rotation construction of arch bridges can be further divided into rotation with and without counterweights, depending on whether the rotation system requires a counterweight. Rotation with a counterweight refers to a method where the center of gravity of the rotation system is positioned as close as possible to the center of the lower rotating ball joint during design and construction. Rotation without a counterweight refers to a method where the rotation system does not require active counterweights and achieves balance through an anchoring system. These traditional rotation construction methods suffer from drawbacks such as the need for temporary supports and towers, complex construction processes, long construction times, and high costs. Furthermore, they present challenges in adjusting the closure elevation. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a beam-arch composite bridge structure.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A beam-arch composite bridge structure, comprising:

[0007] The bridge substructure, main beams, bridge arch structure, arch foot beams, rotation devices, and temporary extension beams;

[0008] The main beam is connected to the substructure of the bridge, the arch foot beam is located at the connection between the main beam and the substructure of the bridge, and the two ends of the arch foot beam extend from both sides of the main beam. The temporary extension beam is detachably connected to the arch foot beam.

[0009] The rotating device slides in conjunction with the temporary extension beam, and the bridge arch structure is detachably hinged to the rotating device.

[0010] Preferably, the temporary extension beam and the arch foot beam are provided with a placement part for placing the bridge arch structure. The temporary extension beam is provided with a slide rail for the rotating device to slide. The arch foot beam is provided with an arch hinge device. One end of the slide rail faces the arch hinge device. The bridge arch structure is detachably connected to the arch hinge device.

[0011] Preferably, the slide rail component has a T-shaped cross-section, and the top of the cross-section of the slide rail component has a semi-elliptical structure.

[0012] Preferably, the arch hinge device is located at the bottom of the arch foot beam and includes an upper arch hinge, a lower arch hinge, a bearing bush, and a stop plate;

[0013] The bearing bush is disposed between the contact surfaces of the upper arch hinge and the lower arch hinge and is fixedly connected to the lower arch hinge. The stop plate consists of two pieces, which are respectively disposed on both sides of the top surface of the lower arch hinge along the axial direction of the lower arch hinge and press down on both sides of the bearing bush and are fastened with screws.

[0014] Preferably, the arch hinge device is located on one side of the temporary extension beam, the lower arch hinge is provided with a pre-embedded steel plate that is welded to the arch foot beam, and the connection between the upper arch hinge and the bridge arch structure is provided with a node plate and bolts.

[0015] Preferably, when the arch hinge device is connected to the bridge arch structure, one end of the stop plate is in contact with the bridge arch structure, and a steel box is welded to the connection between the bridge arch structure and the arch hinge device to cover the connection.

[0016] Preferably, the temporary extension beam includes a first temporary extension beam portion and a second temporary extension beam portion. One end of the first temporary extension beam portion is inserted into the arch foot beam and connected by bolts. The other end of the first temporary extension beam portion extends out of the arch foot beam and is connected to the second temporary extension beam portion. A node plate and bolts are provided at the connection between the first temporary extension beam portion and the second temporary extension beam portion.

[0017] Preferably, the rotating device includes an upper seat plate, a lower seat plate, and a pin connecting the upper seat plate and the lower seat plate. The upper seat plate is connected to the bridge arch structure, and the lower seat plate is in sliding engagement with the temporary extension beam.

[0018] This invention also includes a method for jacking and rotating a beam-arch composite bridge structure, applied to the aforementioned beam-arch composite bridge structure, the steps of which are as follows:

[0019] S1. Construction of the bridge substructure;

[0020] S2, Construction of the main beam;

[0021] S3. Construction and installation of bridge arch structures:

[0022] The bridge arch structure is divided into a first side bridge arch structure and a second side bridge arch structure. The first side bridge arch structure and the second side bridge arch structure are prefabricated in the factory and transported to the bridge site for assembly. Then the first side bridge arch structure is connected to the arch hinge device.

[0023] S4. Vertical lifting, rotation, and fixing of the first side bridge arch structure:

[0024] After the first side bridge arch structure is connected to the arch hinge device, the first side bridge arch structure is rotated by the lifting device and the rotation of the arch hinge device. After the first side bridge arch structure is accurately positioned, the plane and elevation are measured. After verification that they meet the requirements, a steel box is welded at the arch hinge position to close the arch hinge device.

[0025] S5. Installation of temporary extension beams:

[0026] The components for the temporary extension beam are prefabricated in the factory and then connected and fixed to the arch foot beam.

[0027] S6. Installation, sliding, and rotation of the second-side bridge arch structure:

[0028] The second bridge arch structure is connected to the rotating device, which causes the second bridge arch structure to slide on the temporary extension beam toward the arch foot beam, while simultaneously rotating the second bridge arch structure.

[0029] S7. Fixing of the second side bridge arch structure:

[0030] When the second bridge arch structure slides and rotates to the arch foot beam through the rotating device, the second bridge arch structure is connected to the arch hinge device, and the position of the second bridge arch structure is further adjusted by rotating the arch hinge device. After the second bridge arch structure is accurately in place, a steel box is welded at the arch hinge position to close the arch hinge device.

[0031] S8. Removal of temporary extension beams:

[0032] After the second side of the bridge arch structure is connected, the temporary extension beam is removed.

[0033] Preferably, for wide bridges, step S5 is not required; the second side bridge arch structure is directly connected to the arch hinge device. If there is an inter-arch cross brace, the inter-arch cross brace is installed after step S8.

[0034] Compared with the prior art, the beneficial effects of the present invention include:

[0035] The beam-arch composite bridge structure and its jacking and rotation construction method described in this application are applied to the construction technology of composite bridge systems. The added arch foot crossbeam, rotation device and temporary extension crossbeam structure enable the bridge arch structure to slide and rotate on the temporary extension crossbeam and be fixed to the side of the arch foot crossbeam. The structure and construction steps of this application are reasonably designed, which enables the bridge arch structure to complete the lateral rotation construction of the arch even when the bridge deck is narrow. Moreover, the method is convenient to construct and has great application prospects. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a top view of the initial construction stage of the present invention.

[0038] Figure 2 This is a top view of the construction phase of the present invention.

[0039] Figure 3 This is a side view of the construction phase of the present invention.

[0040] Figure 4 This is a structural diagram of the arch hinge device of the present invention.

[0041] Figure 5 This is a front view of the temporary extension beam of the present invention.

[0042] Figure 6 This is a perspective view of the temporary extension beam of the present invention.

[0043] Figure 7 This is a schematic diagram of the rotating device of the present invention.

[0044] in:

[0045] 1-Temporary extension beam, 2-First side bridge arch structure, 3-Second side bridge arch structure, 4-Arch foot beam, 5-Slide rail component, 6-Node plate, 7-Bolt component, 8-Rotation device, 9-Embedded steel plate, 10-Main beam; 11-Arch hinge device, 12-Lower arch hinge, 13-Upper arch hinge, 14-Bearing bush. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0048] Example:

[0049] like Figure 1-7 As shown, this embodiment provides a beam-arch composite bridge structure, including:

[0050] The bridge substructure, main beam 10, bridge arch structure, arch foot beam 4, rotation device 8 and temporary extension beam 1;

[0051] In this embodiment, the main beam 10 is a simply supported beam or a continuous beam, and is supported and connected to the substructure of the bridge through supports. The arch foot beam 4 is located at the connection between the main beam 10 and the substructure of the bridge, i.e., at the support position (support structure omitted in the figure), and the two ends of the arch foot beam 4 extend from the two sides of the main beam 10. In this embodiment, the ends of the arch foot beam 4 extending from the two sides of the main beam 10 are respectively designated as the first arch foot beam end and the second arch foot beam end. Both the first arch foot beam end and the second arch foot beam end are provided with arch hinge devices 11. The second arch foot beam end is provided with a temporary extension beam 1 that is detachably connected to it. The rotating device 8 is slidably engaged with the temporary extension beam 1.

[0052] In this embodiment, the bridge arch structure is divided into a first side bridge arch structure 2 and a second side bridge arch structure 3, which are respectively located on both sides of the main beam 10. The first side bridge arch structure 2 is detachably hinged to the arch hinge device 11 at the end of the first arch foot beam, and the second side bridge arch structure 3 is detachably connected to the arch hinge device 11 at the end of the second arch foot beam or detachably connected to the rotating device 8.

[0053] In this embodiment, specifically, a placement part for placing the bridge arch structure is provided at the connection between the temporary extension beam 1 and the arch foot beam 4. The temporary extension beam 1 is provided with a slide rail 5 for the rotating device 8 to slide. One end of the slide rail 5 faces the arch hinge device 11. The bridge arch structure is detachably connected to the arch hinge device 11.

[0054] In this embodiment, the slide rail 5 has a T-shaped cross section and a semi-elliptical top. Specifically, lubricant can be applied to the slide rail 5 to reduce the friction between the rotating device 8 and the slide rail 5, so that the rotating device 8 can slide towards the arch foot beam 4.

[0055] In this embodiment, the arch hinge device 11 is located at the bottom of the end of the arch foot beam 4, and includes an upper arch hinge 13, a lower arch hinge 12, a bearing bush 14, and a stop plate.

[0056] The bearing bush 14 is disposed between the contact surfaces of the upper arch hinge 13 and the lower arch hinge 12 and is fixedly connected to the lower arch hinge 12. A lubrication groove is opened in the longitudinal direction of the contact surface between the bearing bush 14 and the upper arch hinge 13. The contact surface can be easily lubricated through the lubrication groove to reduce friction. There are two stop plates, which are respectively disposed on both sides of the top surface of the lower arch hinge 12 along the axial direction of the lower arch hinge 12 and press the bearing bush 14 on both sides and fasten it with screws. The stop plates can effectively restrict the rotation of the bearing bush 14, thereby realizing the temporary fixation of the bridge arch structure of the arch hinge device 11.

[0057] Specifically, the arch hinge device 11 is located on one side of the temporary extension beam 1, the lower arch hinge 12 is provided with a pre-embedded steel plate 9 that is welded to the arch foot beam 4, and the upper arch hinge 13 is provided with a node plate 6 and bolts 7 at the connection between it and the bridge arch structure.

[0058] Specifically, when the arch hinge device 11 is connected to the bridge arch structure, one end of the stop plate is in contact with the bridge arch structure, and a steel box is welded to the connection between the bridge arch structure and the arch hinge device 11 to cover the connection.

[0059] In this embodiment, the rotation of the bearing bush 14 allows for more precise adjustment of the bridge arch structure's position after the rotating device 8 reaches the arch hinge device 11. The stop plates located on both sides of the lower arch hinge 12 temporarily fix the arch hinge device 11 to the bridge arch structure after it reaches the precise position. Once the bridge arch structure is precisely in place, the welded steel box can completely seal the arch hinge position, improving the stability of the connection.

[0060] Specifically, the temporary extension beam 1 includes a first temporary extension beam 1 and a second temporary extension beam 1. One end of the first temporary extension beam 1 is inserted into the arch foot beam 4 and connected by bolts. The other end of the first temporary extension beam 1 extends out of the arch foot beam 4 and is connected to the second temporary extension beam 1. A node plate 6 and bolts 7 are provided at the connection between the first temporary extension beam 1 and the second temporary extension beam 1.

[0061] The rotating device 8 in this embodiment includes an upper seat plate, a lower seat plate, and a pin connecting the upper seat plate and the lower seat plate. The upper seat plate is trapezoidal and connected to the transverse diaphragm of the bridge arch structure. The lower seat plate is rectangular and has a groove at the bottom to fit into the slide rail 5 of the temporary extension beam 1 for sliding engagement. The upper seat plate and the lower seat plate are connected by a pin, which allows the bridge arch structure to rotate while sliding, so that the bridge arch structure can be moved to a designated position while the rotation of the bridge arch structure is completed.

[0062] This invention also includes a method for jacking and rotating a beam-arch composite bridge structure, applied to the aforementioned beam-arch composite bridge structure, the steps of which are as follows:

[0063] S1. Construction of the bridge substructure:

[0064] On-site, pile holes are formed in the foundation soil using mechanical drilling, and reinforcing cages are placed inside before concrete is poured to form piles. The foundation pit is excavated using direct excavation, where reinforcing bars are tied and concrete foundation caps are poured. After the foundation caps are completed, the pit is backfilled and thoroughly compacted. The plan position of the bridge piers is determined, followed by reinforcing bar tying, formwork erection, and concrete pouring. After concrete pouring, the formwork is removed, completing the pier construction. Bridge abutment reinforcing bars are fabricated in a processing plant and tied on-site. Abutment concrete is supplied by commercial concrete mixer trucks, poured into the formwork in layers, and cured promptly after pouring.

[0065] S2. Construction of the main beam:

[0066] Working platforms are set up on both sides of the existing piers. The formwork is moved on the beam segment that has been tensioned, anchored and connected to the pier body. The steel bars are tied, the formwork is erected, the concrete is poured and the prestress is applied. After the construction of this segment is completed, the formwork moves forward symmetrically by one stage to carry out the construction of the next beam segment until the cantilever beam segment is completed.

[0067] S3. Construction and installation of bridge arch structures:

[0068] The bridge arch structure is divided into a first side bridge arch structure 2 and a second side bridge arch structure 3. The first side bridge arch structure 2 and the second side bridge arch structure 3 are prefabricated in the factory and transported to the bridge site for assembly. Then the first side bridge arch structure 2 is connected to the arch hinge device 11.

[0069] S4. Vertical lifting, rotation, and fixing of the first side bridge arch structure:

[0070] After the first side bridge arch structure 2 is connected to the arch hinge device 11, the first side bridge arch structure 2 is rotated by the lifting device and the rotation of the arch hinge device 11. After the first side bridge arch structure 2 is accurately positioned, the plane and elevation are measured and verified to meet the requirements. Then, a steel box is welded at the arch hinge position to enclose the arch hinge device 11.

[0071] S5. Installation of temporary extension beams:

[0072] The components of the temporary extension beam 1 are prefabricated in the factory and then connected and fixed to the arch foot beam 4. Specifically, the components of the temporary extension beam 1 are divided into the steel plate of the temporary extension beam 1 and the steel box of the temporary extension beam 1. During installation, the steel plate of the temporary extension beam 1 is first embedded in the arch foot beam 4, and then the steel box of the temporary extension beam 1 is connected to the steel plate of the temporary extension beam 1 through the node plate 6 and the high-strength bolts on the node plate 6, thereby completing the installation of the temporary extension beam 1.

[0073] S6. Installation, sliding, and rotation of the second-side bridge arch structure:

[0074] The second side bridge arch structure 3 is connected to the rotating device 8. The rotating device 8 causes the second side bridge arch structure 3 to slide on the temporary extension beam 1 towards the arch foot beam 4, while simultaneously rotating the second side bridge arch structure 3.

[0075] S7. Fixing of the second side bridge arch structure:

[0076] When the second side bridge arch structure 3 slides and rotates to the arch foot beam 4 through the rotating device 8, the second side bridge arch structure 3 is connected to the arch hinge device 11, and the position of the second side bridge arch structure 3 is further adjusted by the rotation of the arch hinge device 11. After the second side bridge arch structure 3 is accurately in place, a steel box is welded at the arch hinge position to close the arch hinge device 11.

[0077] S8. Removal of temporary extension beams:

[0078] After the second side bridge arch structure 3 is connected, the temporary extension beam 1 is removed.

[0079] Specifically, for wide bridges, step S5 is not required; the second side bridge arch structure 3 is directly connected to the arch hinge device 11. If there is an inter-arch cross brace, the inter-arch cross brace is installed after step S8.

[0080] The structure of this scheme is reasonable, eliminating the need for temporary supports and towers, thus reducing construction steps and time. The added arch foot beam 4, rotation device 8, and temporary extension beam 1 allow the bridge arch structure to slide and rotate on the temporary extension beam 1, which is then fixed to the side of the arch foot beam 4. The structure and construction steps of this application are reasonably designed, enabling the bridge arch structure to complete the lateral rotation construction even when the bridge deck is narrow. Moreover, the method is convenient to construct and has great application prospects.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A beam-arch composite bridge structure, characterized in that, include: The bridge substructure, main beams, bridge arch structure, arch foot beams, rotation devices, and temporary extension beams; The main beam is connected to the substructure of the bridge, the arch foot beam is located at the connection between the main beam and the substructure of the bridge, and the two ends of the arch foot beam extend from both sides of the main beam. The temporary extension beam is detachably connected to the arch foot beam. The rotating device slides in conjunction with the temporary extension beam, and the bridge arch structure is detachably hinged to the rotating device. The temporary extension beam and the arch foot beam are connected by a placement part for placing the bridge arch structure. The temporary extension beam is provided with a slide rail for the rotating device to slide. The arch foot beam is provided with an arch hinge device. One end of the slide rail faces the arch hinge device. The bridge arch structure is detachably connected to the arch hinge device. The temporary extension beam includes a first temporary extension beam section and a second temporary extension beam section. One end of the first temporary extension beam section is inserted into the arch foot beam and connected by bolts. The other end of the first temporary extension beam section extends out of the arch foot beam and is connected to the second temporary extension beam section. A node plate and bolts are provided at the connection between the first temporary extension beam section and the second temporary extension beam section.

2. The beam-arch composite bridge structure according to claim 1, characterized in that, The slide rail component has a T-shaped cross-section, and the top of the cross-section is a semi-elliptical structure.

3. The beam-arch composite bridge structure according to claim 1, characterized in that, The arch hinge device is located at the bottom of the arch foot beam and includes an upper arch hinge, a lower arch hinge, a bearing bush, and a stop plate. The bearing bush is disposed between the contact surfaces of the upper arch hinge and the lower arch hinge and is fixedly connected to the lower arch hinge. The stop plate consists of two pieces, which are respectively disposed on both sides of the top surface of the lower arch hinge along the axial direction of the lower arch hinge and press down on both sides of the bearing bush and are fastened with screws.

4. The beam-arch composite bridge structure according to claim 3, characterized in that, The arch hinge device is located on one side of the temporary extension beam. The lower arch hinge is provided with a pre-embedded steel plate that is welded to the arch foot beam. The connection between the upper arch hinge and the bridge arch structure is provided with a node plate and bolts.

5. The beam-arch composite bridge structure according to claim 4, characterized in that, When the arch hinge device is connected to the bridge arch structure, one end of the stop plate contacts the bridge arch structure, and a steel box is welded to the connection between the bridge arch structure and the arch hinge device to cover the connection.

6. The beam-arch composite bridge structure according to claim 1, characterized in that, The rotating device includes an upper seat plate, a lower seat plate, and a pin connecting the upper seat plate and the lower seat plate. The upper seat plate is connected to the bridge arch structure, and the lower seat plate is slidably engaged with the temporary extension beam.

7. A method for jacking and rotating a beam-arch composite bridge structure, characterized in that, The steps for applying the beam-arch composite system bridge structure according to any one of claims 1-6 are as follows: S1. Construction of the bridge substructure; S2, Construction of the main beam; S3. Construction and installation of bridge arch structures: The bridge arch structure is divided into a first side bridge arch structure and a second side bridge arch structure. The first side bridge arch structure and the second side bridge arch structure are prefabricated in the factory and transported to the bridge site for assembly. Then the first side bridge arch structure is connected to the arch hinge device. S4. Vertical lifting, rotation, and fixing of the first side bridge arch structure: After the first side bridge arch structure is connected to the arch hinge device, the first side bridge arch structure is rotated by the lifting device and the rotation of the arch hinge device. After the first side bridge arch structure is accurately positioned, the plane and elevation are measured. After verification that they meet the requirements, a steel box is welded at the arch hinge position to close the arch hinge device. S5. Installation of temporary extension beams: The components for the temporary extension beam are prefabricated in the factory and then connected and fixed to the arch foot beam. S6. Installation, sliding, and rotation of the second-side bridge arch structure: The second bridge arch structure is connected to the rotating device, which causes the second bridge arch structure to slide on the temporary extension beam toward the arch foot beam, while simultaneously rotating the second bridge arch structure. S7. Fixing of the second side bridge arch structure: When the second bridge arch structure slides and rotates to the arch foot beam through the rotating device, the second bridge arch structure is connected to the arch hinge device, and the position of the second bridge arch structure is further adjusted by rotating the arch hinge device. After the second bridge arch structure is accurately in place, a steel box is welded at the arch hinge position to close the arch hinge device. S8. Removal of temporary extension beams: After the second side of the bridge arch structure is connected, the temporary extension beam is removed.

8. The method for jacking and rotating a beam-arch composite bridge structure according to claim 7, characterized in that, For wide bridges, step S5 is not required; the second side bridge arch structure is directly connected to the arch hinge device. If there are inter-arch cross braces, the inter-arch cross braces are installed after step S8.

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