Stay cable and concrete girder anchoring structure

Abstract

The invention relates to the technical field of bridge structures, in particular to an anchoring device of a stay cable and a concrete girder and a bridge. The anchoring device comprises a cable-girder anchoring structure and two sets of connecting steel plate components, and the cable-girder anchoring structure penetrates through a top plate of a box girder and is fixedly connected with the top plate; the two sets of connecting steel plate components are arranged in the box girder, the upper ends of the two sets of connecting steel plate components are fixedly connected with the cable beam anchoring structure, and the lower ends of the two sets of connecting steel plate components are anchored to a bottom plate of the box girder. The cable-beam anchoring structure is designed by adopting a steel structural member, can be produced in a prefabricated manner and can be quickly mounted through hoisting construction, so that the construction quality and efficiency are remarkably improved; the steel diaphragm plate optimizes the internal structure of the bridge, reduces the occupied space in the box, keeps the longitudinal rigidity of the bottom of the bridge stable, and enhances the overall performance of the bridge; all components in the anchoring device depend on the bolting technology, quality fluctuation caused by welding is avoided, and the consistency and reliability of the structure are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of bridge structures, and in particular to an anchoring device for a stay cable and a concrete main beam, and a bridge. Background Art

[0002] As an important structural form in modern bridge engineering, cable-stayed bridges have been widely used in medium and long span bridges with their unique competitiveness and adaptability. Cable-stayed bridges are composed of three major parts: cables, beams, and towers. The main beam and the main tower are connected into a stable triangular geometric shape through the cable-stayed cables, realizing the effective transmission of the main beam and the load it bears. In the design of cable-stayed bridges, the anchoring connection of the cable on the main beam becomes a key technical issue. The rationality and reliability of the cable-beam anchoring structure are directly related to the safety performance of the entire bridge.

[0003] The cable anchoring structure of traditional concrete main beams mostly adopts tooth block anchoring form. Concrete anchoring blocks are set at the top plate, bottom plate, box inside and other positions of the box beam. The horizontal load of the cable is transmitted to the top and bottom plates through the anchoring blocks. At the same time, in order to balance the vertical force of the cable, it is often necessary to add concrete diaphragms, which makes the cable-beam anchoring area form a large volume solid area. The area has a large amount of concrete, dense steel bars, and difficult concrete vibration, resulting in the construction quality and construction period cannot be effectively guaranteed; moreover, the inclined cables are mostly spatially linear, and the actual positioning of the inclined cable sleeves on site is difficult; at the same time, too many concrete diaphragms will excessively divide the space inside the box, and maintenance personnel need to pass through the manholes on the concrete diaphragms, which is not conducive to the later inspection and maintenance of the structure. Summary of the invention

[0004] The purpose of the present invention is to overcome the technical problems of the existing cable-stayed anchoring structure in which a concrete diaphragm is arranged in a box girder, resulting in large concrete consumption and low construction efficiency, and to provide an anchoring device for a cable-stayed cable and a concrete main beam and a bridge.

[0005] In a first aspect, the present invention provides an anchoring device for a cable-stayed cable and a concrete main beam, comprising a cable-beam anchoring structure and two groups of connecting steel plate members, wherein the cable-beam anchoring structure passes through a top plate of the box beam and is fixedly connected to the top plate, the two groups of connecting steel plate members are arranged inside the box beam, the upper ends of the two groups of connecting steel plate members are respectively fixedly connected to the cable-beam anchoring structure, and the lower ends of the two groups of connecting steel plate members are respectively anchored to the bottom plate of the box beam.

[0006] This application uses two sets of connected steel plate components as lateral supports. Their small size and light weight optimize the internal structure of the bridge, reduce the space occupied in the box, and maintain the stability of the longitudinal stiffness of the bottom of the beam, enhancing the overall performance of the bridge. At the same time, there is no need to cast concrete diaphragms, which improves construction efficiency. Finally, on-site construction mainly relies on bolting technology, which effectively avoids the quality fluctuations that may be caused by the welding process and ensures the consistency and reliability of the cable-beam anchorage structure.

[0007] Preferably, the cable-beam anchoring structure is obliquely arranged on the top plate, and the cable-beam anchoring structure includes a cable sleeve, a first pad, a second pad and two first connecting plates, the two first connecting plates are opposite to each other and spaced apart, the first pad is installed on the top of the two first connecting plates, and the second pad is installed on the bottom of the two first connecting plates, and the cable sleeve passes through the first pad and is connected to the top surface of the second pad.

[0008] The cable-beam anchor structure of the present application is designed with steel structural components, which realizes prefabrication production and can be quickly installed through hoisting construction, which not only significantly improves the construction quality but also greatly accelerates the construction progress.

[0009] Preferably, a horizontal reinforcing plate is provided between the first pad and the second pad, and two second connecting plates are connected to the bottom surface of the horizontal reinforcing plate. The two second connecting plates are respectively arranged on both sides of the two first connecting plates, and the two groups of connecting steel plate components are respectively fixedly connected to the two second connecting plates.

[0010] The horizontal reinforcement plate is arranged in the middle position of the cable-beam anchoring structure and can be used as the bottom reference of the box girder top plate. That is to say, the horizontal reinforcement plate can be flush with the bottom surface of the bridge top plate, and the part between the first pad and the horizontal reinforcement plate can be buried in the concrete of the box girder top plate for anchoring. When the box girder concrete is poured, the horizontal reinforcement plate can be used as a reference to set the template to facilitate positioning of the template installation position. After pouring, the horizontal reinforcement plate can resist the lower surface of the box girder top plate and can withstand the tension of the cable-beam anchoring structure from the upper inclined cable to improve the overall stability of the anchoring device.

[0011] Preferably, the first pad and the second pad are arranged in parallel, and the axis of the inclined cable sleeve is perpendicular to the first pad and the second pad.

[0012] The inclined cable sleeve is arranged vertically to the first pad and the second pad, which can facilitate the adjustment of the inclination angle of the cable-beam anchor structure before installation and pouring, and can also improve the mechanical properties of the cable-beam anchor structure, so that the cable-beam anchor structure is subjected to uniform force at various locations under the tension of the inclined cable, avoiding stress concentration in a certain location that may easily cause structural damage and create safety hazards.

[0013] Preferably, a stiffening rib is connected between the two first connecting plates.

[0014] The stiffening ribs can strengthen the connection performance between the first connecting plates on both sides, further improving the structural stability of the cable-beam anchoring structure.

[0015] Preferably, the cable-beam anchoring structure further comprises a plurality of first shear nails embedded in the top plate, the first shear nails are arranged on the two first connecting plates, and the first shear nails are arranged on the top surface of the horizontal reinforcement plate.

[0016] A plurality of first shear nails are arranged on the top surfaces of the two first connecting plates and the horizontal reinforcing plates, so that the first shear nails can be buried in the top plate concrete when the box girder top plate is poured, thereby strengthening the connection performance between the cable-beam anchoring structure and the box girder top plate and improving the stress-bearing performance of the cable-beam anchoring structure. On this basis, the volume of the concrete blocks near the cable-beam anchoring structure on the top plate can be reduced, thereby reducing the amount of concrete poured and reducing the space occupied by the concrete blocks.

[0017] Preferably, the connecting steel plate components include a steel cross diaphragm, an embedded steel plate, a third connecting plate and a fourth connecting plate. The steel cross diaphragm is connected to the cable-beam anchoring structure via the third connecting plate, the embedded steel plate is connected to the steel cross diaphragm via the fourth connecting plate, and the embedded steel plate is anchored to the bottom plate of the box beam.

[0018] The third connecting plate, steel diaphragm, fourth connecting plate and embedded steel plate can be connected in sequence below the cable-beam anchoring structure. Specifically, the third connecting plate is connected between the steel diaphragm and the second connecting plate. The connecting steel plate component formed by the third connecting plate, steel diaphragm, fourth connecting plate and embedded steel plate can be a long strip structure as a whole. The two groups of connecting steel plate components can be tilted to both sides respectively, so that the anchoring device is a herringbone structure as a whole. While optimizing the overall force mode of the anchoring device, it simplifies the internal structure of the box beam, reduces the occupancy of the internal space of the box beam, and is more convenient for maintenance personnel to pass through the box beam. The existing concrete diaphragm enables personnel to pass through by opening a manhole. Since it is necessary to ensure the mechanical properties of the concrete diaphragm, the manhole area opened is often small, and it is inconvenient for personnel to pass through a smaller manhole. Therefore, the two groups of connecting steel plate components of the present application can reserve a larger space in the box beam, making it more convenient for maintenance personnel to pass through.

[0019] Preferably, a concrete reinforcement block is provided on the bottom plate of the box beam, and the embedded steel plate is anchored in the concrete reinforcement block.

[0020] Providing a concrete reinforcement block at the connection between the embedded steel plate and the bottom plate of the box beam can enhance the anchoring performance of the embedded steel plate in the bottom plate of the box beam. Specifically, the concrete reinforcement block can be located at the junction between the bottom plate and the web of the box beam.

[0021] Preferably, a plurality of second shear nails are arranged on the embedded steel plate, and the second shear nails are embedded in the base plate.

[0022] Arranging the second shear nails on the embedded steel plate can allow the second shear nails to be buried in the bottom plate concrete when the box girder bottom plate is poured, which can strengthen the connection performance between the connecting steel plate component and the box girder bottom plate and improve the stress performance of the connecting steel plate component. On this basis, the volume of the concrete block near the connecting steel plate component on the bottom plate can be reduced, thereby reducing the amount of concrete poured and reducing the space occupied by the concrete blocks.

[0023] In a second aspect, the present invention provides a bridge, comprising a stay cable and an anchoring device for the stay cable and a concrete main beam as described above, wherein the stay cable is fixedly connected to the cable-beam anchoring structure.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides an anchoring device for a cable-stayed cable and a concrete main beam, and a bridge. The cable-beam anchoring structure is designed with steel structural components to realize prefabrication and can be quickly installed through hoisting construction, which not only significantly improves the construction quality but also greatly accelerates the construction progress. Steel diaphragms are selected as transverse supports, which have the characteristics of small size and light weight, optimize the internal structure of the bridge, reduce the space occupied in the box, and at the same time maintain the stability of the longitudinal stiffness of the bottom of the beam, thereby enhancing the overall performance of the bridge. In addition, during on-site construction, the various components in the anchoring device are mainly connected by bolting technology, which effectively avoids the quality fluctuations that may be caused by the welding process and ensures the consistency and reliability of the cable-beam anchoring structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam and the box beam of the present invention.

[0027] Figure 2 This is a schematic diagram of the cross section of the box girder.

[0028] Figure 3 This is a reverse schematic diagram of the cross section of the box girder.

[0029] Figure 4 It is a three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam of the present invention from the first perspective.

[0030] Figure 5 It is a three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam of the present invention from a second viewing angle.

[0031] Figure 6 It is a three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam of the present invention from the third viewing angle.

[0032] Figure 7 It is a side view of the anchoring device of the inclined cable and the concrete main beam of the present invention.

[0033] Markings in the figure:

[0034] 1. Cable-stayed cable casing, 2. First pad, 3. Box girder, 4. First connecting plate, 5. Second connecting plate, 6. Second pad, 7. Third connecting plate, 8. Steel diaphragm, 9. Fourth connecting plate, 10. Embedded steel plate, 11. High-strength friction bolts, 12. Concrete reinforcement block, 13. First shear nail, 14. Second shear nail, 15. Stiffening rib, 16. Horizontal reinforcement plate. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0036] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0038] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0039] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0040] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0041] Example 1

[0042] This embodiment provides an anchoring device for a stay cable and a concrete main beam.

[0043] Figure 1 It is a three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam and the box beam of the present invention; Figure 2 It is a forward schematic diagram of the cross section of the box girder; Figure 3 It is a reverse schematic diagram of the cross section of the box girder; Figure 4 A three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam of the present invention from a first viewing angle; Figure 5 A three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam of the present invention from a second viewing angle; Figure 6 It is a three-dimensional schematic diagram of the anchoring device of the inclined cable and the concrete main beam of the present invention from a third viewing angle; Figure 7 It is a side view of the anchoring device of the inclined cable and the concrete main beam of the present invention.

[0044] like Figures 1 to 7As shown in , the anchoring device of the inclined cable and the concrete main beam described in this embodiment may include a cable-beam anchoring structure and two groups of connecting steel plate members, the cable-beam anchoring structure passes through the top plate of the box beam 3 and is fixedly connected to the top plate, the two groups of connecting steel plate members are arranged inside the box beam 3, the upper ends of the two groups of connecting steel plate members are respectively fixedly connected to the cable-beam anchoring structure, and the lower ends of the two groups of connecting steel plate members are respectively anchored to the bottom plate of the box beam 3; here, the cable-beam anchoring structure passes through the top plate of the box beam 3, the upper end of the cable-beam anchoring structure extends above the top plate, and the lower end of the cable-beam anchoring structure extends to the bottom of the top plate The box beam 3 is located inside the box beam, and the diagonal cable is fixedly connected to the upper end of the cable-beam anchorage structure; two sets of connecting steel plate members are used as lateral supports at the bottom of the cable-beam anchorage structure. The small size and light weight of the connecting steel plate members optimize the internal structure of the bridge, reduce the space occupied in the box, and maintain the stability of the longitudinal stiffness of the bottom of the beam, thereby enhancing the overall performance of the bridge. At the same time, there is no need to cast concrete diaphragms, thereby improving the construction efficiency; finally, the on-site construction mainly relies on bolting technology, which effectively avoids the quality fluctuations that may be caused by the welding process and ensures the consistency and reliability of the cable-beam anchorage structure.

[0045] In the present embodiment, the cable-beam anchoring structure is obliquely arranged on the top plate, and the cable-beam anchoring structure includes an inclined cable sleeve 1, a first pad 2, a second pad 6 and two first connecting plates 4. The two first connecting plates 4 are opposite to each other and spaced apart. The first pad 2 is installed on the top of the two first connecting plates 4, and the second pad 6 is installed on the bottom of the two first connecting plates 4. The inclined cable sleeve 1 passes through the first pad 2 and is connected to the top surface of the second pad 6; here, the inclined cable sleeve 1, the first pad 2, the second pad 6 and the two first connecting plates 4 are combined to form the main structure of the cable-beam anchoring structure. The whole structure is designed with steel structure components, which can be prefabricated and can be quickly installed through hoisting construction, which not only significantly improves the construction quality, but also greatly accelerates the construction progress.

[0046] Optionally, a horizontal reinforcing plate 16 is provided between the first pad 2 and the second pad 6, and two second connecting plates 5 are connected to the bottom surface of the horizontal reinforcing plate 16, and the two second connecting plates 5 are respectively provided on both sides of the two first connecting plates 4, and the two groups of connecting steel plate components are respectively fixedly connected to the two second connecting plates 5; here, the horizontal reinforcing plate 16 is provided in the middle position of the cable-beam anchoring structure, and can be used as the bottom reference of the top plate of the box girder 3, that is, the horizontal reinforcing plate 16 can be flush with the bottom surface of the bridge top plate, and the part between the first pad 2 and the horizontal reinforcing plate 16 can be buried in the concrete of the top plate of the box girder 3 for anchoring. When the box girder 3 is poured with concrete, the horizontal reinforcing plate 16 can be used as a reference to set the template, so as to locate the installation position of the template, and after pouring, the horizontal reinforcing plate 16 can be against the lower surface of the top plate of the box girder 3, and can withstand the tension of the cable-beam anchoring structure subjected to the upper inclined cable, so as to improve the overall stability of the anchoring device.

[0047] Optionally, the first pad 2 and the second pad 6 are arranged in parallel, and the axis of the inclined cable sleeve 1 is perpendicular to the first pad 2 and the second pad 6; the inclined cable sleeve 1 is vertically connected to the planes where the first pad 2 and the second pad 6 are located, respectively; the first connecting plate 4 is parallel to the axis of the inclined cable sleeve 1, and the first connecting plate 4 is perpendicular to the first pad 2 and the second pad 6; here, the inclined cable sleeve 1 is vertically arranged to the first pad 2 and the second pad 6, which can facilitate the adjustment of the inclination angle of the cable-beam anchoring structure before installation and pouring, and can also improve the mechanical properties of the cable-beam anchoring structure, so that the cable-beam anchoring structure is subjected to uniform force at various locations under the tension of the inclined cable, avoiding stress concentration in a certain location that may easily cause structural damage and cause safety hazards.

[0048] Optionally, a stiffening rib 15 is connected between the two first connecting plates 4; the stiffening rib 15 can strengthen the connection performance between the first connecting plates 4 on both sides, and further improve the structural stability of the cable-beam anchoring structure.

[0049] The second connecting plate 5 is arranged parallel to the cross section of the box girder 3 . The actual size of the second connecting plate 5 is determined by the actual size of the cable girder. The whole bridge has a unified size. The second connecting plate 5 is reserved with multiple bolt holes. The first connecting plate 4 is perpendicular to the second connecting plate 5 . The stiffening rib 15 is perpendicular to the inclined cable sleeve 1 .

[0050] In this embodiment, the cable-beam anchoring structure also includes a plurality of first shear nails 13 buried in the top plate, the plurality of first shear nails 13 are arranged on the two first connecting plates 4, and the plurality of first shear nails 13 are arranged on the top surface of the horizontal reinforcing plate 16, that is, the first shear nails 13 are arranged on the concrete contact surface between the cable-beam anchoring structure and the top plate of the box beam 3; here, a plurality of first shear nails 13 are arranged on the two first connecting plates 4 and the top surface of the horizontal reinforcing plate 16, so that the first shear nails 13 can be buried in the top plate concrete when the top plate of the box beam 3 is poured, so that the connection performance between the cable-beam anchoring structure and the top plate of the box beam 3 can be strengthened, and the force-bearing performance of the cable-beam anchoring structure can be improved. On this basis, the volume of the concrete blocks near the cable-beam anchoring structure on the top plate can be reduced, thereby reducing the amount of concrete poured and reducing the space occupied by the concrete blocks.

[0051] The various components in the cable-beam anchorage structure can be connected by welding.

[0052] In this embodiment, the connecting steel plate components include a steel diaphragm 8, an embedded steel plate 10, a third connecting plate 7 and a fourth connecting plate 9. The steel diaphragm 8 is connected to the cable-beam anchoring structure via the third connecting plate 7, the embedded steel plate 10 is connected to the steel diaphragm 8 via the fourth connecting plate 9, and the embedded steel plate 10 is anchored on the bottom plate of the box girder 3; here, the steel diaphragm 8 is an I-beam structure, that is, it is composed of two panels and a web, the two panels are arranged in parallel, and the web is vertically connected between the two panels; here, the third connecting plate 7, the steel diaphragm 8, the fourth connecting plate 9 and the embedded steel plate 10 can be connected in sequence below the cable-beam anchoring structure. Specifically, the third connecting plate 7 is connected between the steel diaphragm 8 and the second connecting plate 5, and the third connecting plate 7 is connected between the steel diaphragm 8 and the second connecting plate 5. The connecting steel plate component formed by the steel cross diaphragm 8, the fourth connecting plate 9 and the embedded steel plate 10 can be an elongated structure as a whole. The two groups of connecting steel plate components can be tilted toward both sides respectively, so that the anchoring device is an overall herringbone structure, which optimizes the overall force mode of the anchoring device while simplifying the internal structure of the box girder 3, reducing the occupancy of the internal space of the box girder 3, and making it more convenient for maintenance personnel to pass through the box girder 3. The existing concrete cross diaphragm realizes the passage of personnel by opening a manhole. Since it is necessary to ensure the mechanical properties of the concrete cross diaphragm, the area of ​​the manhole opened is often small, and it is inconvenient for personnel to pass through a smaller manhole. Therefore, the two groups of connecting steel plate components of the present application can reserve a larger space in the box girder 3, making it more convenient for maintenance personnel to pass through.

[0053] Optionally, a concrete reinforcement block 12 is provided on the bottom plate of the box girder 3, and the embedded steel plate 10 is anchored in the concrete reinforcement block 12; the concrete reinforcement block 12 is provided at the connection between the embedded steel plate 10 and the bottom plate of the box girder 3, which can enhance the anchoring performance of the embedded steel plate 10 in the bottom plate of the box girder 3. Specifically, the concrete reinforcement block 12 can be located at the junction between the bottom plate of the box girder 3 and the web of the box girder 3.

[0054] In this embodiment, a plurality of second shear nails 14 are arranged on the embedded steel plate 10, and the plurality of second shear nails 14 are buried in the bottom plate of the box beam 3; by arranging a plurality of second shear nails 14 on the embedded steel plate 10, the second shear nails 14 can be buried in the bottom plate concrete during pouring of the bottom plate of the box beam 3, which can strengthen the connection performance between the connecting steel plate component and the bottom plate of the box beam 3, and improve the force performance of the connecting steel plate component. On this basis, the volume of the concrete block near the connecting steel plate component on the bottom plate can be reduced, thereby reducing the pouring amount of concrete and reducing the space occupied by the concrete block.

[0055] Arranging a plurality of second shear nails 14 on the embedded steel plate 10 can form a beam bottom embedded part structure. The second shear nails 14 are evenly arranged on the embedded steel plate 10 to strengthen the connection with the concrete and improve the connectivity of the two materials. At the same time, the bottom plate concrete is locally reinforced, i.e., a concrete reinforcement block 12 is formed, which can further enhance the connection between the two and improve the tensile strength of the structure.

[0056] In the connecting steel plate components, the steel diaphragm 8 is an I-beam structure, which can be connected to the cable-beam anchor structure and the embedded steel plate 10 (embedded part at the bottom of the beam) through high-strength friction bolts 11 and the third connecting plate 7 and the fourth connecting plate 9. Specifically, the upper end of the steel diaphragm 8 is connected to the second connecting plate 5 through the third connecting plate 7, and the lower end of the steel diaphragm 8 is connected to the embedded steel plate 10 through the fourth connecting plate 9, forming a complete force system as a whole. This connection method is not only easy to install and disassemble, but also can transmit huge axial force, ensuring the stability and reliability of the connection part. The selection of high-strength friction bolts 11 provides additional safety protection for the entire connection system, so that the entire anchor structure can still maintain a good working condition under extreme working conditions.

[0057] At the initial stage of the bottom construction of the beam, the embedded parts of the bottom of the beam (i.e. the embedded steel plate 10 equipped with the second shear nails 14) can be accurately located and installed, so as to ensure the stability of the subsequent connection; the fine welding of the beam top anchorage area structure (i.e. the cable-beam anchorage structure) is completed in advance in the factory, and it is tightly bolted to the steel cross diaphragm 8 by high-strength friction bolts 11, which greatly improves the efficiency and accuracy of on-site installation; during on-site operations, the prefabricated beam top anchorage area structure is accurately positioned by hoisting technology and firmly connected to the beam body; finally, the overall top plate concrete is cast in one go to form a coordinated force-bearing whole.

[0058] Example 2

[0059] This embodiment provides a bridge.

[0060] The bridge described in this embodiment may include a stay cable and an anchoring device for the stay cable and the concrete main beam as described in Example 1, and the stay cable is fixedly connected to the cable-beam anchoring structure.

[0061] Specifically, the lower end of the inclined cable can be fixed in the inclined cable sleeve 1, and the tension exerted on the inclined cable can be transmitted to the cable-beam anchoring structure and the connecting steel plate components, and finally act on the top plate and the bottom plate of the concrete box girder 3. The anchoring device together with the concrete box girder 3 can form a whole that is subjected to coordinated force, ensuring the stable anchoring of the inclined cable.

[0062] In summary, the present invention provides an anchoring device for a cable-stayed cable and a concrete main beam, and a bridge. The cable-beam anchoring structure is designed with steel structural components to realize prefabrication and can be quickly installed by hoisting construction, which not only significantly improves the construction quality but also greatly accelerates the construction progress. Steel diaphragms are selected as lateral supports. Their small size and light weight optimize the internal structure of the bridge and reduce the space occupied in the box, while maintaining the stability of the longitudinal stiffness of the bottom of the beam and enhancing the overall performance of the bridge. In addition, during on-site construction, the various components in the anchoring device mainly rely on bolting technology, which effectively avoids the quality fluctuations that may be caused by the welding process and ensures the consistency and reliability of the cable-beam anchoring structure.

[0063] The above description is only 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 in the protection scope of the present invention.

Claims

1. An anchoring device for a stay cable and a concrete main beam, characterized in that: It comprises a cable-beam anchoring structure and two groups of connecting steel plate components, wherein the cable-beam anchoring structure passes through the top plate of the box beam (3) and is fixedly connected to the top plate, the two groups of connecting steel plate components are arranged inside the box beam (3), the upper ends of the two groups of connecting steel plate components are respectively fixedly connected to the cable-beam anchoring structure, and the lower ends of the two groups of connecting steel plate components are respectively anchored to the bottom plate of the box beam (3).

2. The anchoring device for the inclined cable and the concrete main beam according to claim 1 is characterized in that: The cable-beam anchoring structure is obliquely arranged on the top plate, and comprises an inclined cable sleeve (1), a first pad (2), a second pad (6) and two first connecting plates (4), wherein the two first connecting plates (4) are arranged opposite to each other and spaced apart, the first pad (2) is mounted on the top of the two first connecting plates (4), the second pad (6) is mounted on the bottom of the two first connecting plates (4), and the inclined cable sleeve (1) passes through the first pad (2) and is connected to the top surface of the second pad (6).

3. The anchoring device for the inclined cable and the concrete main beam according to claim 2 is characterized in that: A horizontal reinforcing plate (16) is provided between the first pad (2) and the second pad (6), and the bottom surface of the horizontal reinforcing plate (16) is connected to two second connecting plates (5), and the two second connecting plates (5) are respectively provided on both sides of the two first connecting plates (4), and the two groups of connecting steel plate components are respectively fixedly connected to the two second connecting plates (5).

4. The anchoring device for the inclined cable and the concrete main beam according to claim 2 is characterized in that: The first pad (2) and the second pad (6) are arranged in parallel, and the axis of the inclined cable sleeve (1) is perpendicular to the first pad (2) and the second pad (6).

5. The anchoring device for the inclined cable and the concrete main beam according to claim 2 is characterized in that: A stiffening rib (15) is connected between the two first connecting plates (4).

6. The anchoring device for the inclined cable and the concrete main beam according to any one of claims 3 to 5, characterized in that: The cable-beam anchoring structure further comprises a plurality of first shear nails (13) embedded in the top plate, wherein the first shear nails (13) are arranged on two of the first connecting plates (4), and the first shear nails (13) are arranged on the top surface of the horizontal reinforcing plate (16).

7. The anchoring device for the inclined cable and the concrete main beam according to claim 1, characterized in that: The connecting steel plate component comprises a steel diaphragm (8), an embedded steel plate (10), a third connecting plate (7) and a fourth connecting plate (9); the steel diaphragm (8) is connected to the cable-beam anchoring structure via the third connecting plate (7); the embedded steel plate (10) is connected to the steel diaphragm (8) via the fourth connecting plate (9); and the embedded steel plate (10) is anchored to the bottom plate of the box beam (3).

8. The anchoring device for the inclined cable and the concrete main beam according to claim 7, characterized in that: A concrete reinforcement block (12) is provided on the bottom plate of the box beam (3), and the embedded steel plate (10) is anchored in the concrete reinforcement block (12).

9. The anchoring device for the inclined cable and the concrete main beam according to claim 7 or 8, characterized in that: A plurality of second shearing nails (14) are arranged on the embedded steel plate (10), and the second shearing nails (14) are embedded in the base plate.

10. A bridge comprising a stay cable and an anchoring device for the stay cable and a concrete main beam according to any one of claims 1 to 9, wherein the stay cable is fixedly connected to the cable-beam anchoring structure.

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