Cable-stayed swivel bridge posture adjustment system and method

Abstract

The application discloses a cable-stayed rotating body bridge posture adjusting system and method, and the system comprises a jacking device, an observation device and a beam end supporting device; when the posture of the cable-stayed rotating body bridge is adjusted, the jacking device and the observation device are arranged at the bottom of the lower rotating disc of the bridge body, the posture of the bridge body is adjusted by jacking and observation, the beam end supporting device is arranged below the two beam ends of the bridge body, the beam ends of the bridge body are tightly pressed and supported, and the beam ends are stabilized. The method comprises the following steps: establishing a posture adjusting measurement control network, collecting initial data, installing the rotating disc jacking and observation device, installing the beam end supporting device, adjusting the posture of the cable tower, temporarily fixing the rotating disc, removing the adjusting equipment, sealing the anchor of the rotating disc, adjusting the posture of the beam end, constructing the beam end closing section and removing the adjusting equipment. The application has the advantages that the posture adjustment can be rapidly implemented after the cable-stayed bridge rotating body is positioned, and the posture of the bridge body can reach the design precision requirement.

Description

Technical Field

[0001] This invention relates to a bridge attitude adjustment system and method, specifically to a cable-stayed rotating bridge attitude adjustment system and method, belonging to the field of bridge engineering technology. Background Technology

[0002] When constructing new railways or highways that cross existing railways, compared with other construction techniques, the planar rotation method has the advantages of a smaller impact range on the existing railway, a shorter impact time, and fewer construction safety hazards. Therefore, it is widely used in actual engineering construction, and T-beam bridges and cable-stayed bridges are often used in bridge structures.

[0003] To ensure the safety and stability of the bridge during the rotation, the bridge was weighed and counterweighted before rotation to make the center of gravity at both ends of the bridge symmetrical. After counterweighting, the bridge posture is mainly controlled by mechanical balance. Therefore, the bridge body has not yet reached the design positioning accuracy requirements in terms of geometric posture. As a result, after the rotation and positioning, the elevation accuracy of the left and right sides of the beam ends will be less than the design requirement, and the bridge posture needs to be adjusted.

[0004] Due to the presence of the pylons, the deviation in the gap between the turntable support and the slideway of a cable-stayed bridge can exponentially amplify the deviation of the pylon tip, thus significantly impacting the pylon's axial deviation and verticality. Consequently, cable-stayed bridges require more precise attitude adjustment. Therefore, this paper proposes an attitude adjustment system and method for cable-stayed swing bridges to address these issues. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a system and method for adjusting the attitude of a cable-stayed bridge after rotation. This system enables rapid attitude adjustment after the cable-stayed bridge is rotated into position, ensuring the bridge's attitude meets design accuracy requirements. This addresses the issue in existing technologies where the bridge's geometric attitude does not yet meet design positioning accuracy requirements, resulting in elevation accuracy on the left and right sides of the beam ends being lower than the design requirements after rotation, necessitating bridge attitude adjustment.

[0006] Furthermore, it is used to address the issue that the presence of the pylon in cable-stayed bridges can exponentially increase the deviation of the pylon tip due to the gap between the turntable support and the slide, thus significantly affecting the pylon's axial deviation and verticality, and consequently requiring cable-stayed bridges to have higher requirements for attitude adjustment.

[0007] According to one aspect of this application, a system and method for adjusting the attitude of a cable-stayed swing bridge are provided, comprising: a lifting device, an observation device, and a beam end support device; When adjusting the attitude of a cable-stayed rotating bridge, the lifting device and the observation device are both located at the bottom of the lower turntable of the bridge body. The attitude of the bridge body is adjusted by lifting and observation. The beam end support device is installed below the two beam ends of the bridge body to hold the beam ends of the bridge body in place and stabilize the beam ends; A post-cast concrete layer is provided above the lower turntable, and an upper turntable is provided above the post-cast concrete layer. A pier is provided on the top of the upper turntable, and the pier is connected to the bottom of the bridge body. A pad stone is provided between the post-cast concrete layer and the upper turntable, and a rotating support is provided on the pad stone. The rotating support is connected to the upper turntable. An outer jack reaction seat, an inner jack reaction seat, and a support foot are also provided between the post-cast concrete layer and the upper turntable.

[0008] Furthermore, the lifting device is located on one side of the observation device, and there are four lifting devices and four observation devices. Each lifting device and each observation device is used together to form a group. The four groups of lifting devices and observation devices are arranged in a circular array below the lower turntable.

[0009] Furthermore, the lifting device includes: a first oil pump, a first prestressed jack, a first jacking iron, a steel plate, a first pressure gauge, and a first oil pipe; the first jacking iron is provided on the top of the first prestressed jack, the steel plate is provided on the top of the first jacking iron, and the first oil pump is equipped with a first oil pipe and a first pressure gauge at both its inlet and outlet, and the end of the first oil pipe is connected to the first prestressed jack.

[0010] Furthermore, the observation device includes: a dial indicator, a support, and a lifting plate mechanism that is adjustable in height and mounted on the top of the support; the dial indicator is mounted on the lifting plate mechanism.

[0011] Furthermore, the lifting platform mechanism includes: a top plate, a movable plate, a guide column, a stop block, a threaded sleeve, a screw, a worm gear, a worm, an end frame, a rotating knob, and a rotating ring; the top plate is fixedly welded to the top of the bracket, the movable plate is provided on the top of the top plate, the screw is fixedly installed on the bottom of the movable plate, the threaded sleeve is threaded on the rod surface of the screw, the threaded sleeve is rotatably installed between the threaded sleeve and the top plate, and the worm gear is fixedly sleeved on the bottom end of the threaded sleeve.

[0012] Furthermore, the worm gear is meshed with the worm, and an end bracket is rotatably mounted at both ends of the worm. The end bracket is fixedly connected to the bottom of the top plate, and a rotation knob is fixedly mounted at one end of the worm.

[0013] Furthermore, the guide post is fixedly installed at the bottom of the movable plate, and the guide post is connected to the guide hole opened on the top plate with clearance fit. The stop block is fixedly installed at the bottom end of the guide post.

[0014] Furthermore, a rotating ring is fixedly sleeved on the outer wall of the threaded sleeve, and the threaded sleeve and the rotating ring are connected to the through hole opened on the top plate with clearance fit.

[0015] Furthermore, the beam end support device includes: a reinforced concrete foundation, a steel pipe column, a second prestressed jack, a second jacking iron, a second oil pump, a second pressure gauge, and a second oil pipe; the steel pipe column is fixedly installed above the reinforced concrete foundation, the second prestressed jack is fixedly installed at the top of the steel pipe column, the second jacking iron is provided at the top of the second prestressed jack, a second oil pipe and a second pressure gauge are installed at the inlet and outlet of the second oil pump, and the end of the second oil pipe is connected to the second prestressed jack.

[0016] As another aspect of this application, a method for adjusting the attitude of a cable-stayed swing bridge is provided, the method comprising the following steps: Step 1: Establish an observation coordinate system using the engineering survey control network. The horizontal position control of the cable-stayed bridge is based on the tower tip, and the elevation control is based on the elevations of both ends on the left and right sides. Collect initial data and calculate attitude deviations. Step 2: Install jacking and observation devices at the lower turntable. At the four endpoints of the cross center line of the lower turntable, install four sets of jacking and observation devices, each set at least 20cm from the edge of the lower turntable. Place the first jacking iron on top of the first prestressed jack, and then place a steel plate on top of the first jacking iron. The first prestressed jack should be at least 200t in size. Install dial gauges at the four endpoints of the cross center line of the lower turntable to observe the vertical displacement of the lower turntable. Adjust the bridge's posture using the jacking and observation devices. Step 3: Install beam end support devices at the beam ends of the bridge structure; the reinforced concrete foundation and steel pipe columns are constructed before the rotation, and after the rotation, the second prestressed jacks, the second jacking iron, and steel plates are installed on the steel pipe columns; the second prestressed jacks are activated to hold the beam ends in place and tighten them; during the tower attitude adjustment stage, the beam end support devices stabilize the beam ends; after the turntable is sealed, the jacking force of the beam end support devices is used to adjust the beam end elevation; Step 3: Based on the existing deviation data of the bridge body, adjust the height difference using the jacks of the lifting device to adjust the attitude of the bridge body, and at the same time observe and measure the deviation of the tower tip plane. Step 4, fine-tuning stage: Calculate the adjustment amount based on the linear equation of the tower tip displacement and the lower turntable displacement, use a multi-table control to adjust the amount, and confirm the measurement with a total station and level. Step 5: After the tower attitude adjustment is completed, the turntable is temporarily fixed, the attitude adjustment system device at the turntable is removed, and the turntable anchoring construction is carried out; after the turntable anchoring is completed, the beam end elevation is adjusted using the beam end support device, the two ends are joined together, and finally the beam end support device is removed.

[0017] The advantages of this application are: the attitude adjustment system and method for cable-stayed bridge provided by this application can quickly adjust the attitude after the cable-stayed bridge is rotated into place, so as to achieve the design accuracy requirements of the bridge attitude. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a cable-stayed swing bridge attitude adjustment system according to one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the lifting device in the illustrated embodiment; Figure 3 yes Figure 1 A schematic diagram of the observation device in the illustrated embodiment; Figure 4 yes Figure 1 The schematic diagram of the lifting platform mechanism in the embodiment shown is as follows; Figure 5 yes Figure 1 A schematic diagram of the structure at the bottom of the top plate in the embodiment shown; Figure 6 yes Figure 1 The schematic diagram of the threaded sleeve and rotating ring in the embodiment shown is as follows; Figure 7 yes Figure 1 A schematic diagram of the beam end support device in the embodiment shown; Figure 8 yes Figure 1 A schematic diagram showing the distribution of the lifting device and the observation device in the illustrated embodiment; Figure 9 yes Figure 1 The diagram shows the structure of the top of the lower turntable in the embodiment shown. Figure 10 yes Figure 1 The flowchart shown in the embodiment illustrates a method for adjusting the attitude of a cable-stayed swing bridge.

[0019] Meaning of the reference numerals in the figure: 1. Bridge body; 2. Lower turntable; 3. Lifting device; 301. First oil pump; 302. First prestressed jack; 303. First jacking block; 304. Steel plate; 305. First pressure gauge; 306. First oil pipe; 4. Observation device; 401. Support; 402. Top plate; 403. Movable plate; 404. Dial gauge; 405. Guide column; 406. Guide hole; 407. Stop block; 408. Threaded sleeve; 409. Screw; 410. Worm gear; 41 1. Worm gear; 412. End frame; 413. Rotating knob; 414. Rotating ring; 5. Beam end support device; 501. Reinforced concrete foundation; 502. Steel pipe column; 503. Second prestressed jack; 504. Second jacking iron; 505. Second oil pump; 506. Second pressure gauge; 507. Second oil pipe; 6. Post-cast concrete layer; 7. Upper turntable; 8. Pier column; 9. Pad stone; 10. Rotating support; 11. External jack reaction seat; 12. Internal jack reaction seat; 13. Support leg. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Reference Figures 1 to 10 A system and method for adjusting the attitude of a cable-stayed bridge with a rotating structure, comprising: a lifting device 3, an observation device 4, and a beam end support device 5; during the adjustment of the attitude of the cable-stayed bridge with a rotating structure, the lifting device 3 and the observation device 4 are both located at the bottom of the lower turntable 2 of the bridge body 1, and the attitude of the bridge body 1 is adjusted by lifting and observation; the beam end support device 5 is located below the two beam ends of the bridge body 1, and holds and tightens the beam ends of the bridge body 1 to stabilize the beam ends; a post-cast concrete layer 6 is provided above the lower turntable 2, and the post-cast concrete... An upper turntable 7 is installed above the soil layer 6, and a pier 8 is installed on the top of the upper turntable 7. The pier 8 is connected to the bottom of the bridge body 1. A pad stone 9 is installed between the post-cast concrete layer 6 and the upper turntable 7. A rotating support 10 is installed on the pad stone 9 and is connected to the upper turntable 7. An outer jack reaction seat 11, an inner jack reaction seat 12, and a support foot 13 are also installed between the post-cast concrete layer 6 and the upper turntable 7. These features enable the cable-stayed bridge to quickly adjust its posture after it is rotated into place, so that the bridge posture meets the design accuracy requirements.

[0027] like Figure 8 As shown, in a specific embodiment, the lifting device 3 is located on one side of the observation device 4, and there are four lifting devices 3 and four observation devices 4. Each lifting device 3 and each observation device 4 are used together to form a group. The four groups of lifting devices 3 and observation devices 4 are arranged in a circular array below the lower turntable 2. There are four groups, which can lift and observe at four positions, and can uniformly apply lifting pressure to the bottom of the lower turntable 2.

[0028] like Figure 2 As shown, in a specific embodiment, the lifting device 3 includes: a first oil pump 301, a first prestressed jack 302, a first jacking block 303, a steel plate 304, a first pressure gauge 305, and a first oil pipe 306; the first jacking block 303 is provided on the top of the first prestressed jack 302, and the steel plate 304 is provided on the top of the first jacking block 303; the first oil pump 301 has a first oil pipe 306 and a first pressure gauge 305 installed at both its inlet and outlet; the end of the first oil pipe 306 is connected to the first prestressed jack 302, which can apply hydraulic pressure and drive the first prestressed jack 302 for lifting.

[0029] like Figure 3 As shown, as a specific embodiment, the observation device 4 includes: a dial gauge 404, a support 401, and a lifting plate mechanism that is adjustable in height and is mounted on the top of the support 401; the dial gauge 404 is mounted on the lifting plate mechanism.

[0030] like Figures 4 to 6As shown, in a specific embodiment, the lifting platform mechanism includes: a top plate 402, a movable plate 403, a guide column 405, a stop block 407, a threaded sleeve 408, a screw 409, a worm gear 410, a worm 411, an end frame 412, a rotating knob 413, and a rotating ring 414; the top plate 402 is fixedly welded to the top of the bracket 401, the movable plate 403 is provided on the top of the top plate 402, and the screw 409 is fixedly installed on the bottom of the movable plate 403. The threaded sleeve 408 is threaded onto the rod surface of the screw 409. The threaded sleeve 408 is rotatably mounted to the top plate 402. The bottom end of the threaded sleeve 408 is fixedly sleeved with the worm gear 410. The worm gear 410 meshes with the worm 411. Both ends of the worm 411 are rotatably mounted with an end bracket 412. The end bracket 412 is fixedly connected to the bottom of the top plate 402. One end of the worm 411 is fixedly mounted with a rotating screw. Button 413; The bottom of the movable plate 403 is fixedly installed with the guide post 405, the guide post 405 is clearance-fitted with the guide hole 406 opened on the top plate 402, and the bottom end of the guide post 405 is fixedly installed with the stop block 407; A rotating ring 414 is fixedly sleeved on the outer wall of the threaded sleeve 408, the threaded sleeve 408 and the rotating ring 414 are clearance-fitted with the through hole opened on the top plate 402, wherein a dial indicator 4 is installed. The height of the movable plate 403 is adjustable, making it suitable for supporting the dial indicator 404 at different heights. Specifically, by turning the rotary knob 413, the worm gear 411 is rotated. Through the meshing transmission between the worm gear 411 and the worm wheel 410, the threaded sleeve 408 rotates, which in turn turns the screw 409. The screw 409 is fixed to the movable plate 403 and is guided by the guide post 405 and the guide hole 406, which can drive the movable plate 403 to move up and down.

[0031] like Figure 7 As shown, in a specific embodiment, the beam end support device 5 includes: a reinforced concrete foundation 501, a steel pipe column 502, a second prestressed jack 503, a second jacking iron 504, a second oil pump 505, a second pressure gauge 506, and a second oil pipe 507; the steel pipe column 502 is fixedly installed above the reinforced concrete foundation 501, the second prestressed jack 503 is fixedly installed at the top of the steel pipe column 502, the second jacking iron 504 is provided at the top of the second prestressed jack 503, a second oil pipe 507 and a second pressure gauge 506 are installed at the inlet and outlet of the second oil pump 505, and the end of the second oil pipe 507 is connected to the second prestressed jack 503.

[0032] As another aspect of this application, a method for adjusting the attitude of a cable-stayed swing bridge is provided, the method comprising the following steps: Step 1: Establish an observation coordinate system using the engineering survey control network. The horizontal position control of the cable-stayed bridge is based on the tower tip, and the elevation control is based on the elevations of both ends on the left and right sides. Collect initial data and calculate attitude deviations. Step 2: Install a lifting device 3 and an observation device 4 at the lower turntable 2; install 4 sets of lifting devices 3 and observation devices 4 at the four endpoints of the cross center line of the lower turntable 2, each set being no less than 20cm from the edge of the lower turntable 2; place a first jack 303 above the first prestressed jack 302, and a steel plate 304 above the first jack 303; the first prestressed jack 302 is no less than 200t; install dial gauges 404 at the four endpoints of the cross center line of the lower turntable 2 to observe the vertical displacement of the lower turntable 2; adjust the attitude of the bridge body 1 using the lifting device 3 and the observation device 4. Step 3: Install beam end support device 5 at the beam end of bridge body 1; the reinforced concrete foundation and steel pipe column 502 are completed before the rotation, and after the rotation, install the second prestressed jack 503, the second jacking iron 504, and the steel plate 304 on the steel pipe column 502; start the second prestressed jack 503 to hold and tighten the beam end; during the stage of adjusting the tower posture, the beam end support device 5 stabilizes the beam end; after the turntable is sealed, use the lifting force of the beam end support device 5 to adjust the beam end elevation; Step 3: Based on the existing deviation data of bridge body 1, adjust the height difference using the jacks of the lifting device 3 to adjust the attitude of bridge body 1, and at the same time observe and measure the deviation of the tower tip plane. Step 4, fine-tuning stage: Calculate the adjustment amount based on the linear equation of the tower tip displacement and the lower turntable 2 displacement, use table-based control to adjust the amount, and confirm the measurement with a total station and level. Step 5: After the tower attitude adjustment is completed, the turntable is temporarily fixed, the attitude adjustment system device at the turntable is removed, and the turntable anchoring construction is carried out; after the turntable anchoring is completed, the beam end support device 5 is used to adjust the beam end elevation, and the two ends closing section construction is carried out. Finally, the beam end support device 5 is removed.

[0033] The above description is merely a specific embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for adjusting the attitude of a cable-stayed swing bridge, characterized in that: The method for adjusting the attitude of a cable-stayed swing bridge includes: a cable-stayed swing bridge attitude adjustment system; The attitude adjustment system of the cable-stayed rotating bridge includes: a lifting device (3), an observation device (4), and a beam end support device (5); When adjusting the attitude of the cable-stayed rotating bridge, the lifting device (3) and the observation device (4) are both set at the bottom of the lower turntable (2) of the bridge body (1). The attitude of the bridge body (1) is adjusted by lifting and observation. The beam end support device (5) is located below the two beam ends of the bridge body (1) to hold the beam ends of the bridge body (1) in place and stabilize the beam ends. A post-cast concrete layer (6) is provided above the lower turntable (2), and an upper turntable (7) is provided above the post-cast concrete layer (6). A pier (8) is provided on the top of the upper turntable (7), and the pier (8) is connected to the bottom of the bridge body (1). A pad stone (9) is provided between the post-cast concrete layer (6) and the upper turntable (7). A rotating support (10) is provided on the pad stone (9), and the rotating support (10) is connected to the upper turntable (7). An outer jack reaction seat (11), an inner jack reaction seat (12), and a support foot (13) are also provided between the post-cast concrete layer (6) and the upper turntable (7). The beam end support device (5) includes: a reinforced concrete foundation (501), a steel pipe column (502), a second prestressed jack (503), a second jack (504), a second oil pump (505), a second pressure gauge (506), and a second oil pipe (507); the steel pipe column (502) is fixedly installed above the reinforced concrete foundation (501), the second prestressed jack (503) is fixedly installed at the top of the steel pipe column (502), the second jack (504) is provided at the top of the second prestressed jack (503), the second oil pump (505) is equipped with a second oil pipe (507) and a second pressure gauge (506) at both the inlet and outlet of the second oil pump (505), and the end of the second oil pipe (507) is connected to the second prestressed jack (503); The method for adjusting the attitude of the cable-stayed swing bridge includes the following steps: Step 1: Establish an observation coordinate system using the engineering survey control network. The horizontal position control of the cable-stayed bridge is based on the tower tip, and the elevation control is based on the elevations of both ends on the left and right sides. Collect initial data and calculate attitude deviations. Step 2: Install the lifting device (3) and the observation device (4) at the lower turntable (2); Step 3: Install beam end support device (5) at the beam end of the bridge body (1); the reinforced concrete foundation and steel pipe column (502) are completed before the rotation. After the rotation, install the second prestressed jack (503) and the second jacking iron (504) on the steel pipe column (502); start the second prestressed jack (503) to hold the beam end tightly; during the stage of adjusting the tower posture, the beam end support device (5) stabilizes the beam end; after the turntable is sealed, use the lifting force of the beam end support device (5) to adjust the beam end elevation; Step 3: Based on the existing deviation data of the bridge body (1), the height difference is adjusted by using the jacks of the lifting device (3) to adjust the attitude of the bridge body (1) and at the same time, the deviation of the tower tip plane is observed and measured. Step 4, fine-tuning stage: calculate the adjustment amount based on the linear equation of the displacement of the tower tip and the displacement of the lower turntable (2), use the table sub-table to control the adjustment amount, and confirm the measurement with total station and level. Step 5: After the tower attitude adjustment is completed, the turntable is temporarily fixed, the attitude adjustment system device at the turntable is removed, and the turntable anchoring construction is carried out. After the turntable anchoring is completed, the beam end support device (5) is used to adjust the beam end elevation, and the two ends closing section construction is carried out. Finally, the beam end support device (5) is removed.

2. The method for adjusting the attitude of a cable-stayed swing bridge according to claim 1, characterized in that: The lifting device (3) is located on one side of the observation device (4), and there are four lifting devices (3) and four observation devices (4). Each lifting device (3) and each observation device (4) is used together and forms a group. The four groups of lifting devices (3) and observation devices (4) are arranged in a ring array below the lower turntable (2).

3. The method for adjusting the attitude of a cable-stayed swing bridge according to claim 1, characterized in that: The lifting device (3) includes: a first oil pump (301), a first prestressed jack (302), a first jack (303), a steel plate (304), a first pressure gauge (305), and a first oil pipe (306); the first jack (303) is provided on the top of the first prestressed jack (302), the steel plate (304) is provided on the top of the first jack (303), the first oil pump (301) is equipped with a first oil pipe (306) and a first pressure gauge (305) at both the inlet and outlet, and the end of the first oil pipe (306) is connected to the first prestressed jack (302).

4. The method for adjusting the attitude of a cable-stayed rotating bridge according to claim 3, characterized in that: The observation device (4) includes: a dial gauge (404), a support (401), and a lifting plate mechanism that can be raised and lowered to adjust the height on the top of the support (401); the dial gauge (404) is mounted on the lifting plate mechanism.

5. The method for adjusting the attitude of a cable-stayed rotating bridge according to claim 4, characterized in that: The lifting platform mechanism includes: a top plate (402), a movable plate (403), a guide column (405), a stop block (407), a threaded sleeve (408), a screw (409), a worm gear (410), a worm (411), an end frame (412), a rotating knob (413), and a rotating ring (414); the top plate (402) is fixedly welded to the top of the bracket (401), the movable plate (403) is provided on the top of the top plate (402), the screw (409) is fixedly installed on the bottom of the movable plate (403), the threaded sleeve (408) is threaded on the rod surface of the screw (409), the threaded sleeve (408) is rotatably installed between the threaded sleeve (408) and the top plate (402), and the worm gear (410) is fixedly sleeved on the bottom end of the threaded sleeve (408).

6. The method for adjusting the attitude of a cable-stayed swing bridge according to claim 5, characterized in that: The worm gear (410) is meshed with the worm (411). Both ends of the worm (411) are rotatably mounted with an end bracket (412). The end bracket (412) is fixedly connected to the bottom of the top plate (402). One end of the worm (411) is fixedly mounted with a rotating knob (413).

7. The method for adjusting the attitude of a cable-stayed rotating bridge according to claim 5, characterized in that: The bottom of the movable plate (403) is fixedly installed with the guide post (405), the guide post (405) is connected to the guide hole (406) opened on the top plate (402) with clearance fit, and the bottom end of the guide post (405) is fixedly installed with the stop block (407).

8. The method for adjusting the attitude of a cable-stayed rotating bridge according to claim 5, characterized in that: A rotating ring (414) is fixedly sleeved on the outer wall of the threaded sleeve (408), and the threaded sleeve (408) and the rotating ring (414) are connected to the through hole opened on the top plate (402) with clearance fit.

9. The method for adjusting the attitude of a cable-stayed rotating bridge according to claim 4, characterized in that: In step two, four sets of lifting devices (3) and observation devices (4) are installed at the four ends of the cross center line of the lower turntable (2). Each set is not less than 20cm from the edge of the lower turntable (2). The first jack (303) is placed above the first prestressed jack (302), and the steel plate (304) is placed above the first jack (303). At the same time, the first prestressed jack (302) has a specification of not less than 200t. Dial gauges (404) are installed at the four ends of the cross center line of the lower turntable (2) to observe the vertical displacement of the lower turntable (2). The attitude of the bridge body (1) is adjusted by the lifting devices (3) and observation devices (4).

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