Box girder supporting structure, fish-bellied box girder and bridge

Abstract

The utility model relates to the technical field of bridge engineering, in particular to a box girder supporting structure, a fish-bellied box girder and a bridge. The box girder supporting structure comprises at least two force transmission plates and a foot supporting plate, one end of each force transmission plate is connected with a box girder bottom plate, and the other end of each force transmission plate is fixed to the plate face of the foot supporting plate. A mounting surface is arranged on one side, deviating from the force transmission plate, of the supporting foot plate, and is matched with the top surface of the support, so that the supporting foot plate can be mounted on the support. According to the box girder supporting structure provided by the utility model, the force transmission plate is arranged as a middle connecting piece to connect the box girder bottom plate and the supporting foot plate, so that a mounting surface matched with the support can be formed on the curved-surface-shaped box girder bottom plate, and the connection between the box girder bottom plate and the support is facilitated; a stable and effective supporting foot structure can be formed on the box girder bottom plate, an effective force transmission path and constraint are formed between the box girder bottom plate and the support, and the supporting foot has high structural strength and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a box beam supporting structure, a fish-belly box beam and a bridge. Background Art

[0002] In recent years, with the continuous development of my country's rail transit industry, large-span bridges, especially large-span cable-stayed bridges and large-span suspension bridges have been widely used. Compared with concrete box girders, steel box girders have the characteristics of large cross-sectional torsional stiffness, good integrity, excellent seismic performance, light weight, and strong spanning capacity. Therefore, steel box girders have been more and more widely used.

[0003] There are many structural shapes of steel box girders. The bottom plate of a conventional steel box girder is mostly a horizontally placed steel plate structure. A support steel plate can be welded on the bottom plate of the steel box girder and a constrained connection is formed with the support through the support steel plate.

[0004] However, this conventional structure cannot be applied to fish-belly type and other curved steel box girders. The bottom plate of fish-belly type and other curved steel box girders is not a flat plate and cannot form an effective constraint with the support steel plate, making it difficult to ensure the safety of the supporting structure. Utility Model Content

[0005] The purpose of the invention of the utility model is to provide a box girder support structure, a fish-belly box girder and a bridge in response to the problems existing in the prior art, which can form an effective constraint between the support and the bottom plate of the curved box girder to ensure the safety of the support structure.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A box beam support structure comprises a force transmission plate and a foot plate, wherein one end of the force transmission plate is connected to a bottom plate of the box beam, and the other end of the force transmission plate is fixed to a plate surface of the foot plate, and the number of the force transmission plates is at least two; the foot plate has a mounting surface on a side facing away from the force transmission plate, and the mounting surface is matched with a top surface of a support so that the foot plate can be mounted on the support.

[0008] The box beam support structure provided by the utility model can be used for a fish-belly box beam, and a force transmission plate is provided as an intermediate connecting piece to connect the box beam bottom plate and the support plate, so that a mounting surface adapted to the support can be formed on the curved box beam bottom plate, which is convenient for connecting the box beam bottom plate and the support;

[0009] The number of force transfer plates is at least two, which can form a stable and effective support structure on the bottom plate of the box girder, constitute an effective force transfer path and constraint between the bottom plate of the box girder and the support, and have high structural strength and stability.

[0010] As a preferred solution of the utility model, the footing plate and the force transmission plate are both steel plates, and the plate surfaces of the force transmission plate and the footing plate are perpendicular to each other;

[0011] and / or,

[0012] There are two force transmission plates, which are symmetrically distributed on the foot support plate.

[0013] The steel plate material is easy to install and cut. The force transfer plate is perpendicular to the footboard, which is beneficial to improve the structural strength and stability between the two. The two symmetrically distributed force transfer plates can save materials while achieving stable support.

[0014] The utility model also provides a fish-belly box girder, comprising a box girder body, the box girder body having a box girder bottom plate in the shape of a curved surface, and also comprising the box girder supporting structure as described above, wherein: the box girder supporting structure is located below the box girder bottom plate.

[0015] The fish-belly box girder provided by the utility model, due to the use of the above-mentioned box girder supporting structure, can form a mounting surface compatible with the support on the curved box girder bottom plate, thereby facilitating the connection between the box girder bottom plate and the support; at the same time, it can form an effective force transmission path and constraint between the box girder bottom plate and the support, thereby achieving a stable connection between the box girder body and the lower structure, and has high structural strength and stability.

[0016] As a preferred solution of the utility model, a support transverse diaphragm is arranged inside the box girder body, and a stiffening plate assembly is arranged on the support transverse diaphragm.

[0017] Providing support diaphragms and stiffening plate assemblies can enhance the structural strength of the box girder body at the support position, which is beneficial to the safety of the bridge structure.

[0018] As a preferred solution of the utility model, the stiffening plate assembly includes at least two pairs of first stiffening plates, the first stiffening plates are aligned with the force transmission plates, and the first stiffening plates are connected to the bottom plate of the box beam.

[0019] Providing a first stiffening plate aligned with the force transfer plate and connected to the bottom plate of the box beam can prevent shear damage between the force transfer plate and the bottom plate of the box beam, which is beneficial to the safety of the bridge structure.

[0020] As a preferred solution of the utility model, the first stiffening plate and the force transmission plate are made of the same material and have the same thickness, which not only makes procurement and production more convenient, but also facilitates the alignment and matching of the two.

[0021] As a preferred solution of the utility model, the force transfer plate is parallel to the longitudinal direction of the box girder body.

[0022] The supporting structure has greater stiffness along the bridge and is able to resist relatively large loads along the bridge.

[0023] The utility model also provides a bridge, comprising a bridge pier and the fish-belly box girder as described above, wherein a support is arranged on the bridge pier, and a footboard is installed on the support.

[0024] The bridge provided by the utility model, due to the use of the fish-belly box girder as described above, can form a stable connection between the box girder body and the lower structure, not only has high structural strength and stability, but also has good overall economic benefits, and can ensure the safety and reliability of the bridge structure during the operation cycle.

[0025] As a preferred solution of the utility model, the box girder body, the force transfer plate and the support plate are integrally prefabricated parts.

[0026] Prefabricating the three together in the beam factory and then transporting them to the site for installation can reduce construction difficulty and improve efficiency.

[0027] As a preferred solution of the utility model, an adjustment plate is provided between the footboard and the support, the thickness of the adjustment plate is uneven, and two plate surfaces of the adjustment plate are respectively in contact with the footboard and the support.

[0028] The leveling plate is set to adjust the angle between the footboard and the support according to the on-site conditions.

[0029] Especially for box girders with a slope along the bridge, an inclined angle along the bridge will be generated between the bottom surface of the support plate and the top surface of the support in the integral prefabricated part. Providing an adjustment plate can quickly and conveniently level the inclined angle.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0031] 1. The box girder support structure provided by the utility model can be used for the fish-belly box girder. By arranging a force transmission plate as an intermediate connecting piece to connect the box girder bottom plate and the support foot plate, a mounting surface compatible with the support can be formed on the curved box girder bottom plate, which is convenient for connecting the box girder bottom plate and the support. The number of force transmission plates is at least two, which can form a stable and effective support foot structure on the box girder bottom plate, constitute an effective force transmission path and constraint between the box girder bottom plate and the support, and have high structural strength and stability.

[0032] 2. The fish-belly box girder provided by the utility model, due to the use of the box girder support structure as described above, can form a mounting surface that is compatible with the support on the curved box girder bottom plate, thereby facilitating the connection between the box girder bottom plate and the support; at the same time, it can form an effective force transmission path and constraint between the box girder bottom plate and the support, thereby achieving a stable connection between the box girder body and the lower structure, and has high structural strength and stability.

[0033] 3. The bridge provided by the utility model, due to the use of the fish-belly box girder as described above, can form a stable connection between the box girder body and the lower structure, not only has high structural strength and stability, but also has good overall economic benefits, and can ensure the safety and reliability of the bridge structure during the operation period. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a cross-sectional view of the fish-bellied box girder of the utility model in the transverse direction of the bridge;

[0035] Figure 2 for Figure 1 Detailed drawing of section A in the middle;

[0036] Figure 3 It is a cross-sectional view along the bridge direction of the box girder support structure described in the utility model.

[0037] Markings in the figure: 1-force transfer plate; 2-support plate; 3-adjustment plate; 4-box girder body; 5-box girder bottom plate; 6-support; 7-support cross diaphragm; 8-first stiffening plate; 9-U rib. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in combination with test examples and specific implementation methods. 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.

[0039] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product / equipment / device of the utility model when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying 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.

[0040] 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 solution of the utility model.

[0041] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0042] In addition, in the description of the embodiments of the present invention, "several", "multiple" 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.

[0043] In addition, in the description of the technical solution of the utility model, 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 communication of two components.

[0044] Example 1

[0045] This embodiment provides a box beam support structure, see Figure 1-3 , including a force transmission plate 1 and a foot plate 2, one end of the force transmission plate 1 is connected to the bottom plate 5 of the box beam, and the other end of the force transmission plate 1 is fixed on the plate surface of the foot plate 2, and the number of the force transmission plates 1 is at least two; the foot plate 2 has a mounting surface on the side facing away from the force transmission plate 1, and the mounting surface is adapted to the top surface of the support 6, so that the foot plate 2 can be mounted on the support 6.

[0046] The footboard 2 and the force transmission plate 1 can be hard structural members with high structural strength such as steel plates, iron plates, etc. The footboard 2 and the force transmission plate 1 can be solid components or hollow or hollow components.

[0047] The number of the force transmission plates 1 is at least two, and the multiple force transmission plates 1 can be arranged in parallel or intersectingly.

[0048] The shape of the box girder bottom plate 5 can be a plane or a curved surface. If the shape of the box girder bottom plate 5 is a plane, the side of the force transfer plate 1 connected to the box girder bottom plate 5 is a plane; if the shape of the box girder bottom plate 5 is a curved surface, the side of the force transfer plate 1 connected to the box girder bottom plate 5 is a curved surface that matches the shape of the box girder bottom plate 5.

[0049] One end of the force transmission plate 1 is fixed on the upper plate surface of the foot support plate 2, and a stiffening rib can be arranged between the force transmission plate 1 and the foot support plate 2 to improve the connection strength and stability between the two.

[0050] The lower plate surface of the footboard 2 has a mounting surface matched with the top surface of the support 6. Generally speaking, the mounting surface is a plane and has bolt holes for bolt connection.

[0051] The footboard 2 may be a single structural member, or may be formed by combining a plurality of structural members that can be separated from each other.

[0052] The box girder support structure provided by the utility model can be used for a fish-belly box girder. By arranging a force transmission plate 1 as an intermediate connecting piece to connect the box girder bottom plate 5 and the support plate 2, a mounting surface compatible with the support 6 can be formed on the curved box girder bottom plate 5, thereby facilitating the connection between the box girder bottom plate 5 and the support 6.

[0053] There are at least two force transfer plates 1, which can form a stable and effective support structure on the box girder bottom plate 5, constitute an effective force transfer path and constraint between the box girder bottom plate 5 and the support 6, and have high structural strength and stability.

[0054] Preferably, the foot plate 2 and the force transfer plate 1 are both steel plates, the plate surfaces of the force transfer plate 1 and the foot plate 2 are perpendicular to each other, the steel plate has greater structural strength and is easy to cut and fix, the force transfer plate is perpendicular to the foot plate, which is beneficial to improve the structural strength and stability between the two, the foot plate 2 and the force transfer plate 1 and the force transfer plate 1 and the box beam bottom plate 5 can be fixed by welding.

[0055] Preferably, there are two force transmission plates 1, which are symmetrically distributed on the footboard 2. The two force transmission plates 1 are parallel to each other and symmetrically distributed along the center line of the footboard 2, which can save materials and achieve stable support.

[0056] Example 2

[0057] This embodiment provides a fish-belly box beam, see Figure 1-3, including a box girder body 4, the box girder body 4 has a box girder bottom plate 5 in the shape of a curved surface, and also includes a box girder supporting structure as described in Example 1, wherein: the box girder supporting structure is located below the box girder bottom plate 5.

[0058] The box girder body 4 comprises a box girder top plate, a box girder bottom plate 5 and a box girder side plate, and the box girder top plate, the box girder bottom plate 5 and the box girder side plate enclose a cavity.

[0059] In this embodiment, the box beam bottom plate 5 is in the shape of a curved surface, similar to the belly of a fish.

[0060] The box beam support structure is located below the box beam bottom plate 5 , and the connection relationship between the two is as described in Example 1. The box beam support structure is used to transfer the deadweight of the box beam body 4 and its upper load.

[0061] The bottom of the box beam bottom plate 5 refers to the bottom of the box beam body 4 when it is placed upright. At this time, the top plate of the box beam is located above the bottom plate 5 of the box beam.

[0062] For a box girder body 4 with a wider bridge deck, the number of box girder support structures can be two on the same cross section, and they are symmetrically distributed along the center line of the box girder.

[0063] The fish-belly box girder provided by the utility model, due to the use of the above-mentioned box girder supporting structure, can form a mounting surface that is compatible with the support 6 on the curved box girder bottom plate 5, thereby facilitating the connection between the box girder bottom plate 5 and the support 6; at the same time, it can form an effective force transmission path and constraint between the box girder bottom plate 5 and the support 6, thereby achieving a stable connection between the box girder body 4 and the lower structure, and has high structural strength and stability.

[0064] Preferably, the force transfer plate 1 is parallel to the longitudinal direction of the box girder body 4 .

[0065] The longitudinal direction of the box girder body 4 refers to the longitudinal direction of the bridge composed of the box girder body 4 and other structures. On the plane of the bridge deck, the dynamic load in the longitudinal direction is larger than that in the transverse direction. Setting the force transfer plate 1 parallel to the longitudinal direction of the box girder body 4 can make the supporting structure have a larger longitudinal stiffness, which is beneficial to the safety of the bridge structure.

[0066] Example 3

[0067] This embodiment provides a fish-belly box beam, see Figure 1 , the design is further optimized on the basis of Example 2. Specifically, in this embodiment, a support diaphragm 7 is provided inside the box girder body 4, and a stiffening plate assembly is provided on the support diaphragm 7.

[0068] The support transverse diaphragm 7 refers to a transverse diaphragm structure arranged at the position of the support 6. After the box girder body 4 is installed, the support transverse diaphragm 7 is located above the support 6.

[0069] The plate surface direction of the support transverse partition 7 is perpendicular to the longitudinal direction of the bridge.

[0070] A manhole can be provided on the support diaphragm 7 for passing through, and the manhole is not connected to the stiffening plate assembly.

[0071] The stiffening plate assembly includes at least one stiffening plate, which is located on the support transverse diaphragm 7 and is used to enhance the structural strength of the support transverse diaphragm 7 .

[0072] Preferably, the stiffening plates are symmetrically distributed along the plate surface of the support transverse diaphragm 7 to balance the force on the support transverse diaphragm 7 .

[0073] Preferably, the stiffening plate assembly includes at least two pairs of first stiffening plates 8 , the first stiffening plates 8 are aligned with the force transmission plate 1 , and the first stiffening plates 8 are connected to the box beam bottom plate 5 .

[0074] Each pair of first stiffening plates 8 includes two first stiffening plates 8 symmetrically distributed along the plate surface of the support transverse diaphragm 7 .

[0075] The number of the first stiffening plates 8 matches the number of the force transmission plates 1 , that is, if the number of the force transmission plates 1 is 2, the number of the first stiffening plates 8 is 4 and they are distributed in two pairs.

[0076] The length direction of the first stiffening plate 8 is parallel or approximately parallel to the plate surface of the force transmission plate 1 , the first stiffening plate 8 is aligned with the force transmission plate 1 , and the ends of the first stiffening plate 8 and the force transmission plate 1 are respectively located on both sides of the same position of the box beam bottom plate 5 .

[0077] The provision of the first stiffening plate 8 can prevent shear damage between the force transfer plate 1 and the box beam bottom plate 5, which is beneficial to the safety of the bridge structure.

[0078] Further preferably, the material and thickness of the first stiffening plate 8 and the force transmission plate 1 are the same. In this embodiment, the first stiffening plate 8 and the force transmission plate 1 are both steel plates, and the steel plates have the same model and thickness, which can make procurement and production more convenient and also facilitate alignment and cooperation between the two.

[0079] Further preferably, the stiffening plate assembly may further include a second stiffening plate, the shape and arrangement of the second stiffening plate are similar to those of the first stiffening plate 8 , except that the second stiffening plate is not aligned with the force transmission plate 1 .

[0080] The provision of a second stiffening plate can further improve the strength of the bearing diaphragm 7, which is beneficial to the safety of the bridge structure.

[0081] If a U-rib 9 is provided at the bottom plate inside the box girder body 4 and hinders the installation of the stiffening plate assembly, holes can be provided on the U-rib 9 for the stiffening plate assembly to pass through. The design principle is: to ensure the integrity of the large structure, local holes in the small structure are acceptable.

[0082] Example 4

[0083] A bridge provided in this embodiment includes a bridge pier and a fish-belly box girder as described in Embodiment 2 or 3, wherein: a support 6 is provided on the bridge pier, and a footboard 2 is installed on the support 6.

[0084] Bridge piers are a general term for piers and abutments, referring to the substructure of the bridge.

[0085] The support 6 is a bridge support, which can be anchored on a bridge pier or abutment by an anchor rod, and is generally used to support a bridge deck. In the present application, the support 6 is used to support a fish-belly box girder.

[0086] The top surface of the support 6 is generally flat and can be closely connected with the footboard 2 .

[0087] The bridge provided by the utility model, due to the use of the above-mentioned fish-belly box girder, can form a stable connection between the box girder body 4 and the lower structure, not only has high structural strength and stability, but also has good overall economic benefits, and can ensure the safety and reliability of the bridge structure during the operation period.

[0088] Preferably, the box girder body 4, the force transfer plate 1 and the support plate 2 are integrally prefabricated parts.

[0089] It can be prefabricated in the beam factory and transported to the site for installation, which can reduce the difficulty of construction and improve efficiency.

[0090] Further preferably, an adjustment plate 3 is provided between the footboard 2 and the support 6 , the thickness of the adjustment plate 3 is uneven, and two plate surfaces of the adjustment plate 3 are respectively in contact with the footboard 2 and the support 6 .

[0091] In the integral prefabricated parts produced by the beam factory, the bottom surface of the support plate 2 is generally parallel to the main plane direction of the box beam body 4. During installation, it is easy for it to not fit tightly with the support 6. For this reason, an adjustment plate 3 is set between the support plate 2 and the support 6.

[0092] In particular, since the top surface of the support 6 is generally parallel to the horizontal plane, and for the box girder body 4 having a slope along the bridge direction, an inclined angle along the bridge direction will be generated between the bottom surface of the support plate 2 and the top surface of the support 6. At this time, the leveling plate 3 can be set to a wedge shape to quickly level the inclined angle.

[0093] The leveling plate 3 is generally manufactured on site, and the specific shape is set according to site needs.

[0094] The leveling plate 3 can be a hard structural member such as a steel plate or an iron plate with high structural strength.

[0095] In this embodiment, the adjustment plate 3 is a steel plate, and two plate surfaces of the adjustment plate 3 are respectively welded to the supporting plate 2 and the support 6 .

[0096] 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. A box beam support structure, characterized in that: It comprises a force transmission plate (1) and a foot support plate (2), wherein one end of the force transmission plate (1) is connected to a box beam bottom plate (5), and the other end of the force transmission plate (1) is fixed on the plate surface of the foot support plate (2), and the number of the force transmission plates (1) is at least two; The side of the support plate (2) facing away from the force transmission plate (1) has a mounting surface, and the mounting surface is matched with the top surface of the support (6), so that the support plate (2) can be mounted on the support (6).

2. A box beam support structure according to claim 1, characterized in that: The support plate (2) and the force transmission plate (1) are both steel plates, and the plate surfaces of the force transmission plate (1) and the support plate (2) are perpendicular to each other; and / or, The number of the force transmission plates (1) is two, and the two force transmission plates (1) are symmetrically distributed on the foot support plate (2).

3. A fish-bellied box girder, comprising a box girder body (4), wherein the box girder body (4) has a box girder bottom plate (5) in the shape of a curved surface, characterized in that: It also comprises a box girder supporting structure as claimed in any one of claims 1 to 2, wherein: the box girder supporting structure is located below the box girder bottom plate (5).

4. The fish-bellied box beam according to claim 3, characterized in that: A support transverse diaphragm (7) is arranged inside the box beam body (4), and a stiffening plate assembly is arranged on the support transverse diaphragm (7).

5. The fish-bellied box beam according to claim 4, characterized in that: The stiffening plate assembly comprises at least two pairs of first stiffening plates (8), wherein the first stiffening plates (8) are aligned with the force transmission plates (1), and the first stiffening plates (8) are connected to the box beam bottom plate (5).

6. The fish-bellied box beam according to claim 5, characterized in that: The first stiffening plate (8) and the force transmission plate (1) are made of the same material and have the same thickness.

7. The fish-bellied box beam according to claim 3, characterized in that: The force transmission plate (1) is parallel to the longitudinal direction of the box girder body (4).

8. A bridge, characterized in that: It comprises a bridge pier and a fish-bellied box girder as claimed in any one of claims 3 to 7, wherein a support (6) is arranged on the bridge pier, and the support plate (2) is installed on the support (6).

9. A bridge according to claim 8, characterized in that: The box beam body (4), the force transmission plate (1) and the support plate (2) are integrally prefabricated parts.

10. A bridge according to claim 9, characterized in that: An adjustment plate (3) is provided between the foot support plate (2) and the support seat (6); the thickness of the adjustment plate (3) is uneven, and two plate surfaces of the adjustment plate (3) are respectively in contact with the foot support plate (2) and the support seat (6).

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