Bridge support and bridge plane swivel construction method

Abstract

The embodiment of the application provides a bridge support and a bridge plane swivel construction method, the bridge support comprises a support plate, a lining plate, a plane sliding plate, a spherical surface sliding plate, a sliding control device and a locking device, wherein at least one surface of the lining plate is an outer spherical surface structure, the outer spherical surface structure of the lining plate and an inner spherical surface structure on the support plate and the spherical surface sliding plate located between the two structures form a spherical surface pair, the plane sliding plate and components arranged above and below the plane sliding plate form a plane sliding pair, the sliding control device is used for controlling the movement direction of the support body or limiting the sliding of the support body; the support body is fixed on the upper structure and the lower structure connected with the bridge through the locking device. The sliding control device limits the movement direction of the support body, and the bridge support of the application can be converted between the permanent support and the swivel support functions.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and more specifically, to a bridge bearing and a bridge planar rotation construction method using this bearing. Background Technology

[0002] With the rapid development of my country's transportation industry and the increasingly dense highway and railway networks, grade-separated intersections are becoming more and more common due to terrain features and existing transportation infrastructure. As one of the main construction methods for grade-separated intersections, the swing bridge construction method is being increasingly widely used in bridge construction. Compared with traditional construction techniques, the swing bridge construction method has the advantages of not interfering with traffic, maintaining uninterrupted navigation, and being able to cross deep ditches, rivers, and roads with heavy traffic. It also has minimal impact on the objects it crosses, lower investment, shorter construction period, and mature technology, making it the preferred construction method for bridges crossing railways and busy roads. It is widely used in bridge engineering in various fields such as railways, highways, municipal works, and rail transit.

[0003] Currently, the main construction technique for rotating bridges is the horizontal rotation method, which achieves planar rotation by using a rotating device installed at the bottom of the pier or beam. Placing the rotating device at the bottom of the beam is a method that has been gradually adopted in recent years. It has advantages such as small rotating weight and low construction and installation costs, and is suitable for situations with large or very small pier heights and complex construction environments.

[0004] After assembly, the function of the bridge bearing becomes to transfer the reaction forces and deformations (displacement and rotation) of the superstructure to the substructure, ensuring the safety and stability of the bridge structure. At this point, based on the stress requirements, the superstructure of the bridge needs to achieve translational and rotational functions within a certain range at the bearing location. Simultaneously, the main function of the slewing bearing is to drive the beam to rotate horizontally (vertically), moving it from the pouring construction position to the predetermined design position; therefore, it needs to be capable of stable horizontal rotation.

[0005] The large design rotation angle and translational design of slewing bearings make it difficult to meet the safety and stability requirements during the rotation construction process. Furthermore, slewing bearings typically lack planar sliding friction pairs and have a small design rotation angle, which cannot meet the functional requirements of bridge bearings after assembly. While bottom-mounted slewing has many advantages, the space under the beam is narrow, and in addition to the slewing device, it also houses bearings, anti-falling blocks, and other components, resulting in limited working space and mutual interference. Therefore, current planar slewing construction methods typically involve setting slewing bearings at the bridge foundation during beam casting and fabrication. After beam fabrication is completed and the beam is rotated to the assembly position, it is necessary to jack up the beam, remove the slewing bearings, and install permanent bearings. This process is complex, time-consuming, and wasteful of materials. More importantly, the jacking process is cumbersome and carries high construction risks; currently, there is no mature experience in jacking up large-tonnage beams. Summary of the Invention

[0006] To address one of the aforementioned technical deficiencies, this application provides a bridge bearing and a bridge planar rotation construction method using this method.

[0007] According to a first aspect of the embodiments of this application, a bridge bearing is provided, which includes a bearing body, the bearing body including a bearing plate and a liner plate, wherein at least one side of the liner plate is an outer spherical structure, and the bearing body is provided with an inner spherical structure corresponding to the spherical portion of the liner plate, the outer spherical structure of the liner plate and the inner spherical structure on the bearing body form a spherical pair.

[0008] The sliding plate includes a flat sliding plate and a spherical sliding plate, wherein the spherical sliding plate is disposed between the outer spherical structure of the liner and the inner spherical structure on the support body, and the flat sliding plate is disposed between the flat structure of the liner and the support body and / or between the flat structure of the support body and the bridge connection.

[0009] A sliding control device, which is installed on the support body, is used to control the movement direction of the support body or limit the sliding of the support body;

[0010] A locking device is used to fix the support body between the superstructure and substructure of the bridge.

[0011] Furthermore, the aforementioned support plate includes an upper support plate and a lower support plate, the aforementioned liner is a spherical crown liner, the lower surface of the aforementioned spherical crown liner has a protruding outer spherical structure, the upper surface of the lower support plate has an inner spherical structure, a spherical sliding plate is provided between the lower surface of the spherical crown liner and the upper surface of the lower support plate, the lower surface of the spherical crown liner, the upper surface of the lower support plate and the spherical sliding plate together constitute a spherical pair; the upper surface of the aforementioned spherical crown liner and the lower surface of the upper support plate are both planar structures, a planar sliding plate is provided between the upper surface of the spherical crown liner and the lower surface of the upper support plate, the upper surface of the spherical crown liner, the lower surface of the upper support plate and the planar sliding plate together constitute a planar sliding pair.

[0012] Furthermore, the aforementioned upper support plate and lower support plate are disc-shaped structures.

[0013] Furthermore, the centers of the upper support plate, the lower support plate, and the spherical crown liner are located on the same vertical axis, and the centers of the upper support plate, the lower support plate, and the spherical crown liner are all provided with pin holes, and the pin holes on the upper support plate, the lower support plate, and the spherical crown liner are coaxially arranged.

[0014] Furthermore, the inner diameter of the pin holes at the centers of the upper and lower support plates is the same, and the inner diameter of the pin holes on the spherical crown liner is not greater than the inner diameter of the pin holes at the center of the lower support plate.

[0015] Furthermore, the aforementioned sliding control device includes an upper pin and a lower pin, which are coaxially arranged. The outer diameter of the upper pin is larger than that of the lower pin, but smaller than the inner diameter of the pin holes on the upper and lower support plates. The outer diameter of the lower pin is smaller than the inner diameter of the pin holes on the support plate, the lower support plate, and the spherical crown liner.

[0016] Furthermore, the aforementioned upper and lower pins are integrally formed structures.

[0017] Furthermore, the aforementioned sliding control device also includes a flexible cable, one end of which is connected to the upper end of the aforementioned upper pin, and the other end of which is connected to the control device, which controls the tensioning or relaxation of the flexible cable.

[0018] Furthermore, the aforementioned locking device is a sleeve bolt structure.

[0019] According to a second aspect of the embodiments of this application, a bridge planar rotation construction method is provided. This bridge planar rotation construction method uses the bridge bearings described above and includes the following steps:

[0020] The steps for determining the vertical bearing capacity of the bridge bearings based on the functional requirements of the bridge bearings and rotation devices;

[0021] The dimensions of each component of the bridge bearing are determined by the vertical bearing capacity and the facade design angle of the bridge bearing, and the steps of manufacturing the bridge bearing are completed.

[0022] The steps for on-site construction of the bridge's substructure pile foundation, pile cap, and bridge bearing pads;

[0023] The steps for installing the bridge bearing at the center position of the bottom of the beam;

[0024] After the cast-in-place rotating beam section is constructed, the supporting body and the rotating beam section above it are controlled by a sliding control device to slide or rotate in a plane according to the construction needs, so that the rotating beam section is in place.

[0025] The steps for leveling and temporarily locking the beam are as follows.

[0026] Using the bridge bearing provided in this application embodiment, without constraints, its spherical pair can enable the bearing body to rotate within a certain range, and the planar sliding plate can enable the bearing body to translate within a certain range. The sliding control device can restrict the direction of movement of the bearing body, thereby enabling the bridge bearing of this application to switch between the functions of a permanent bearing and a rotating bearing. When the bearing body can simultaneously translate and rotate, it can realize its bearing function; when the translational movement and vertical rotation of the bearing body are restricted, and it can only rotate along the plane, it can realize the rotation operation.

[0027] The aforementioned support is a structure that serves as both a rotation device and a support, saving material costs for the rotation device compared to existing technologies and reducing overall costs. Secondly, the integration of the rotation and support structures reduces construction interference, avoids the process of replacing the support on the top beam, shortens the construction period, and reduces construction safety risks. Thirdly, the structure can switch between rotation and support functions, and its construction is simple and reliable. It not only meets the needs of construction and operation, but can also be converted into a rotation device to complete the reverse rotation of the bridge during bridge demolition, realizing the reversible function of the bridge. Finally, the bridge support provided in this application embodiment meets the bridge rotation requirements during construction and realizes the function of a bridge support after the rotation is completed, with advantages such as safety, reliability, low cost, and high efficiency. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a structural schematic diagram of a bridge bearing provided in an embodiment of this application;

[0030] Figure 2 This is a partial arrangement diagram of the pins used to implement the support function in an embodiment of this application;

[0031] Figure 3 A partial arrangement diagram of the pin shafts for implementing the rotation function provided in this application embodiment;

[0032] Figure 4 A top view of a bridge structure provided in an embodiment of this application;

[0033] Figure 5 A flowchart illustrating the construction steps of the bridge planar rotation method provided in this application embodiment.

[0034] Figure label:

[0035] 1-Upper support plate; 2-Lower support plate; 3-Spherical crown liner; 4-Flat sliding plate; 5-Spherical sliding plate; 6-Upper pin; 7-Lower pin; 8-Control device; 9-Locking device; 10-Flexible cable. Detailed Implementation

[0036] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0037] In the process of developing this application, the inventors discovered that in existing bridge construction technologies, when using the horizontal rotation construction method, planar rotation is typically achieved through a rotation device installed at the bottom of the pier or beam. In practice, the space at the bottom of the beam is narrow, and in addition to the rotation device, supports, anti-falling beam blocks, and other components are also arranged, resulting in limited construction space and mutual interference. Furthermore, after the rotation is completed, the beam needs to be topped to dismantle the rotation device and install permanent supports, which is a complex process, time-consuming, and wasteful of rotation materials; more importantly, the beam-topping process is cumbersome and carries a high construction risk.

[0038] To address the aforementioned issues, this application provides a dual-purpose bridge bearing. This bridge bearing can rotate around a vertical axis passing through the center of the bearing during planar rotation construction. After the bridge body is in place, it can be converted into a bridge bottom bearing, eliminating the need for the steps of jacking up the beam, dismantling the rotating bearing, and then installing a permanent bearing. This simplifies the process, shortens the construction period, saves materials for manufacturing permanent bearings, and reduces the risk of jacking up the beam.

[0039] Figure 1 This is a structural schematic diagram of the bridge bearing provided in the embodiments of this application, such as... Figure 1 The bridge bearing shown includes a bearing body, a sliding plate, a sliding control device, and a locking device. The bearing body includes a bearing plate and a liner plate. At least one side of the liner plate is an outer spherical structure. The bearing body has an inner spherical structure corresponding to the spherical part of the liner plate. The outer spherical structure of the liner plate and the inner spherical structure on the bearing body form a spherical pair. The sliding plate includes a planar sliding plate 4 and a spherical sliding plate 5. The spherical sliding plate 5 is disposed between the outer spherical structure of the liner plate and the inner spherical structure on the bearing body. The planar sliding plate 4 is disposed between the planar structure of the liner plate and the bearing body and / or between the planar structure at the connection between the bearing body and the bridge. The sliding control device is installed on the bearing body and is used to control the movement direction of the bearing body or restrict the sliding of the bearing body. The bearing body is fixed to the bridge base by the locking device.

[0040] The aforementioned sliding control device can be controlled manually or mechanically, or by a computer control system. When the sliding control device restricts the bearing body, preventing it from translating relative to the lining plate or the bottom structure of the bridge at the planar sliding plate, and also preventing it from rotating vertically around the rotation center of the bridge superstructure, and only allowing the beam installed on the spherical joint to rotate in a planar manner, the bridge bearing provided in this application can be used as a rotating bearing to realize the rotation operation. After the beam rotates to the predetermined position, the sliding control device is released from restriction. Within a certain range, the bearing body can perform translational, rotational, and vertical rotation. At this time, it can be used as a permanent bearing without the need to remove and install a permanent bearing separately.

[0041] In the above description, planar motion refers to the movement of the support body on a horizontal plane; planar rotation refers to the rotation of the support about the vertical central axis of the spherical sliding plate (an axis perpendicular to the horizontal plane and passing through the center of the sphere); and vertical rotation refers to rotation about an axis passing through the rotation center of the bridge superstructure. Because the rotation center of the bridge and the rotation center of the support do not coincide (normally they do not coincide), the support must be able to perform planar motion simultaneously to achieve vertical rotation.

[0042] This application provides specific implementation methods for the support body, such as... Figure 1 As shown, the support plate includes an upper support plate 1 and a lower support plate 2. The liner is a spherical crown liner 3. The lower surface of the spherical crown liner 3 protrudes into an outer spherical structure, and the upper surface of the lower support plate 2 has an inner spherical structure. A spherical sliding plate 5 is provided between the lower surface of the spherical crown liner 3 and the upper surface of the lower support plate 2. The lower surface of the spherical crown liner 3, the upper surface of the lower support plate 2, and the spherical sliding plate 5 together constitute a spherical pair. The upper surface of the spherical crown liner 3 and the lower surface of the upper support plate 1 are both planar structures. A planar sliding plate 4 is provided between the upper surface of the spherical crown liner 3 and the lower surface of the upper support plate 1. The upper surface of the spherical crown liner 3, the lower surface of the upper support plate 1, and the planar sliding plate 4 together constitute a planar sliding pair.

[0043] Figure 4 A top view of the bridge structure provided in the embodiments of this application, such as... Figure 4 As shown, the upper support plate 1 and the lower support plate 2 are disc-shaped structures. During construction, both the upper support plate 1 and the lower support plate 2 are set parallel to the horizontal plane. The disc-shaped structure facilitates their function as rotating supports. Through holes are provided on the outer periphery of the upper and lower support plates for installing sleeve bolts as locking devices.

[0044] Furthermore, the centers of the upper support plate 1, the lower support plate 2, and the spherical crown liner 3 are located on the same vertical axis, that is, the centers of the upper support plate 1, the lower support plate 2, and the center of the spherical crown liner 3 are located on the same axis, which is perpendicular to the horizontal plane during construction. Each of the upper support plate 1, the lower support plate 2, and the spherical crown liner 3 has a pin hole at its center, and the pin holes on the upper support plate 1, the lower support plate 2, and the spherical crown liner 3 are coaxially arranged.

[0045] Furthermore, the inner diameter of the pin holes at the centers of the upper support plate 1 and the lower support plate 2 is the same, and the inner diameter of the pin holes on the spherical crown liner 3 is not greater than the inner diameter of the pin holes at the center of the lower support plate 2.

[0046] This application embodiment also provides an implementation of a sliding control device, which includes an upper pin 6 and a lower pin 7, coaxially arranged, wherein the outer diameter of the upper pin 6 is larger than the outer diameter of the lower pin 7. Simultaneously, the outer diameter of the pin 6 is smaller than the inner diameter of the pin holes on the upper support plate 1 and the lower support plate 2; the outer diameter of the lower pin 7 is smaller than the inner diameter of the pin holes on the support plate 1, the lower support plate 2, and the spherical crown liner 3.

[0047] Furthermore, the upper pin 6 and the lower pin 7 are integrally formed cylindrical structures. The upper pin 6 is positioned above the lower pin 7, both housed within pin holes. This integrally formed structure ensures the rigidity of the pins, further guaranteeing the rigidity of the bridge support. The cylindrical structure facilitates proper engagement with the pin holes.

[0048] Figure 2 This is a partial arrangement diagram of the pins used to implement the support function in an embodiment of this application, as shown below. Figure 2 As shown, when the pin moves upward and the upper pin 6 is located in the pin hole of the upper support plate 1, because the inner diameter of the lower pin 7 is smaller than that of the upper pin 6, there is a large gap between the lower pin 7 and the spherical crown liner 3. Therefore, the upper support plate 1 and the spherical crown liner 3 can translate within a certain range. Since the overall height of the pin is not greater than the sum of the heights of the upper support plate 1 and the spherical crown liner 3, therefore... Figure 2 In this state, the bottom end of the lower pin 7 is located above the upper surface of the lower support plate 2, and the spherical pair at the spherical sliding plate rotates without constraint, allowing for rotation within a certain range. In this state, the bridge superstructure needs to achieve translational and rotational functions within a certain range at the support position, and it can be used as a permanent support.

[0049] Figure 3 A partial arrangement diagram of the pin shafts for implementing the rotation function provided in the embodiments of this application is shown below. Figure 3 As shown, the pins move downwards, with the upper end of the upper pin 6 located in the pin hole of the upper support plate 1 and the lower end located in the pin hole of the spherical crown liner 3. The lower end of the lower pin 7 sinks into the pin hole of the lower support plate 7. Since the outer diameter of the upper pin 6 is larger than the outer diameter of the lower pin 7, in Figure 3 In this state, there is only a small gap between the upper pin 6 and the upper support plate 1 and the spherical crown liner 3. Therefore, the relative translation between the upper support plate 1 and the spherical crown liner 3 is restricted, while the rotation between the spherical crown liner 3 and the lower support plate 7 is unrestricted. Since the inner diameter of the pin hole in the lower support plate 7 is smaller than the inner diameter of the pin hole in the spherical crown liner 3, there is only a small gap between the lower end of the lower pin 7 and the lower support plate 7. Therefore, the rotation between the spherical crown liner 3 and the lower support plate 7 can be guaranteed to be a vertical rotation, that is, the spherical crown liner 3 rotates around its vertical central axis. In this state, the specific embodiment of this application can be used as a rotating support, realizing the rotation of the beam during construction.

[0050] Furthermore, the aforementioned sliding control device also includes a flexible cable 10. One end of the flexible cable 10 is connected to the upper end of the upper pin 6, and the other end is connected to the control device 8. The control device 8 controls the tensioning or loosening of the flexible cable 10. The flexible cable 10 can be made of high-strength materials such as steel cable, steel wire rope, or graphene material rope. When the flexible cable 10 is tensioned, the aforementioned pin is lifted to... Figure 2 As shown, when the flexible cable 10 is relaxed, the aforementioned pin moves to... Figure 3 The state shown is as follows. The control device 8 may include a drive motor and a rope shaft. The flexible cable 10 is wound around the rope shaft, and the drive motor drives the rope shaft to rotate, so as to control the tension or relaxation of the flexible cable 10.

[0051] Furthermore, the locking device 9 is a sleeve bolt structure.

[0052] This application also provides a method for bridge planar rotation construction, such as... Figure 5 As shown, this bridge planar rotation construction method uses the bridge bearings described above, and includes the following steps:

[0053] The steps for determining the vertical bearing capacity of the bridge bearings based on the functional requirements of the bridge bearings and the rotation device are as follows: For example, if the rotation tonnage is about 18,000 tons, then the vertical bearing capacity of the bearings and the rotation device is 20,000 tons, and the facade design rotation angles are 0.02 rad and 0.003 rad, respectively.

[0054] The dimensions of each component of the bridge bearing are determined by the vertical bearing capacity and the facade design angle of the bridge bearing, and the steps of manufacturing the bridge bearing are completed.

[0055] The steps for on-site construction of the bridge's substructure pile foundation, pile cap, and bridge bearing pads;

[0056] The step of installing the bridge bearing at the center of the bottom of the beam; in this step, if a pin and flexible cable are used as the sliding control device, a stainless steel pipe with a diameter of 30mm can be set between the top surface of the upper pin and the top surface of the bottom of the beam. A steel wire rope with one end anchored in the pin is led through the stainless steel pipe to the top surface of the bottom plate of the beam and fixed by steel plate, bolt and nut.

[0057] After the cast-in-place rotating beam section is constructed, a sliding control device is used to control the support body, along with the rotating beam section above it, to slide or rotate in a planar manner to position the rotating beam section as needed during construction. For example, the steel wire rope is released from the top surface of the beam's bottom plate, and the pin falls under its own weight. At this time, the pin is... Figure 3 The state satisfies the function of rotation.

[0058] After the beam has rotated into position, proceed with beam leveling and temporary locking. Once beam leveling is complete, tension the steel wire rope on the top surface of the beam's base plate and pull up the pin, positioning it in the correct position. Figure 2 Once the bridge is in a stable condition and meets the requirements for permanent support, the beam is temporarily locked. Then, the construction of the cast-in-place beam section of the side span is carried out, and small-tonnage auxiliary supports are installed on both sides of the transverse bridge at the bottom of the beam, and other subsequent procedures are carried out until the bridge is completed.

[0059] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0063] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A bridge bearing, characterized in that, The bridge support includes: The support body includes a support plate and a liner plate, wherein at least one side of the liner plate is an outer spherical structure, and the support body is provided with an inner spherical structure corresponding to the spherical part of the liner plate. The outer spherical structure of the liner plate and the inner spherical structure on the support body form a spherical pair. The sliding plate includes a flat sliding plate (4) and a spherical sliding plate (5), wherein the spherical sliding plate (5) is disposed between the outer spherical structure of the liner and the inner spherical structure on the support body, and the flat sliding plate (4) is disposed between the flat structure of the liner and the support body and / or between the flat structure of the support body and the bridge connection. A sliding control device, which is installed on the support body, is used to control the movement direction of the support body or limit the sliding of the support body; A locking device is used to fix the support body between the superstructure and substructure of the bridge. The support plate includes an upper support plate (1) and a lower support plate (2). The liner is a spherical crown liner (3). The lower surface of the spherical crown liner (3) protrudes into an outer spherical structure. The upper surface of the lower support plate (2) is provided with an inner spherical structure. A spherical sliding plate (5) is provided between the lower surface of the spherical crown liner (3) and the upper surface of the lower support plate (2). The lower surface of the spherical crown liner (3), the upper surface of the lower support plate (2), and the spherical sliding plate (5) together constitute a spherical pair. The upper surface of the spherical crown liner (3) and the lower surface of the upper support plate (1) are both planar structures. A planar sliding plate (4) is provided between the upper surface of the spherical crown liner (3) and the lower surface of the upper support plate (1). The upper surface of the spherical crown liner (3), the lower surface of the upper support plate (1), and the planar sliding plate (4) together constitute a planar sliding pair. The sliding control device includes an upper pin (6) and a lower pin (7), which are coaxially arranged. The outer diameter of the upper pin (6) is larger than that of the lower pin (7) and smaller than the inner diameter of the pin holes on the upper support plate (1) and the lower support plate (2). The outer diameter of the lower pin (7) is smaller than the inner diameter of the pin holes on the support plate (1), the lower support plate (2) and the spherical crown liner (3). The upper pin (6) and the lower pin (7) are integrally formed. The sliding control device also includes a flexible cable (10), one end of which is connected to the upper end of the upper pin (6), and the other end is connected to the control device. The control device controls the flexible cable (10) to tighten or loosen.

2. The bridge bearing according to claim 1, characterized in that: The upper support plate (1) and the lower support plate (2) are disc-shaped structures.

3. The bridge bearing according to claim 2, characterized in that: The centers of the upper support plate (1), the lower support plate (2) and the spherical crown liner (3) are located on the same vertical axis. The centers of the upper support plate (1), the lower support plate (2) and the spherical crown liner (3) are all provided with pin holes, and the pin holes on the upper support plate (1), the lower support plate (2) and the spherical crown liner (3) are coaxially arranged.

4. The bridge bearing according to claim 3, characterized in that: The inner diameter of the pin hole at the center of the upper support plate (1) and the lower support plate (2) is the same, and the inner diameter of the pin hole on the spherical crown liner (3) is not greater than the inner diameter of the pin hole at the center of the lower support plate (2).

5. The bridge bearing according to any one of claims 1-4, characterized in that: The locking device (9) is a sleeve bolt structure.

6. A method for bridge planar rotation construction, characterized in that: The bridge planar rotation construction method uses the bridge bearing as described in any one of claims 1-5, and includes the following steps: The steps to determine the vertical bearing capacity of bridge bearings based on the functional requirements of bridge bearings and rotation devices; The dimensions of each component of the bridge bearing are determined by the vertical bearing capacity and the facade design angle of the bridge bearing, and the steps of manufacturing the bridge bearing are completed. The steps for on-site construction of the bridge's substructure pile foundation, pile cap, and bridge bearing pads; The steps for installing the bridge bearing at the center position of the bottom of the beam; After the cast-in-place rotating beam section is constructed, the supporting body and the rotating beam section above it are controlled by a sliding control device to slide or rotate in a plane according to the construction needs, so that the rotating beam section is in place. The steps for leveling and temporarily locking the beam are as follows.

7. The bridge planar rotation construction method according to claim 6, characterized in that: The steps for installing the bridge support at the center of the beam bottom are as follows: a stainless steel pipe is installed between the top surface of the pin and the top surface of the beam bottom, and a flexible cable (10) with one end anchored to the top surface of the upper pin (6) is led to the top surface of the bottom plate through the stainless steel pipe, and the other end of the flexible cable (10) is connected to the control device.

8. The bridge planar rotation construction method according to claim 7, characterized in that: The flexible cable (10) is a steel wire rope or a carbon fiber rope.

9. The bridge planar rotation construction method according to claim 8, characterized in that: The bridge planar rotation construction method also includes the step of casting the rotating beam section in place along the existing railway direction. When casting the rotating beam section in place, the flexible cable (10) is loosened on the top surface of the bottom plate of the beam. At this time, the pin falls under its own weight, which satisfies the rotation function.

10. The bridge planar rotation construction method according to claim 9, characterized in that: The steps for leveling and temporarily locking the beam include: After the beam is leveled, the flexible cable (10) is tightened on the top surface of the bottom plate of the beam by a control device. At this time, the pin is lifted to satisfy the support function. After the beam body is temporarily locked, the construction of the cast-in-place section of the side span is completed.

11. The bridge planar rotation construction method according to claim 10, characterized in that: The bridge planar rotation construction method also includes the step of installing small-tonnage auxiliary supports on both sides of the beam bottom support in the transverse direction.

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