Method for determining two-way gravity center position of asymmetric curve swivel bridge

Abstract

The invention discloses a method for determining a bidirectional gravity center position of an asymmetric curve swivel bridge, which comprises the following steps of: S1, removing a sand box constraint between an upper spherical hinge and a lower spherical hinge of the asymmetric curve swivel bridge so as to judge a balance state of a bridge structure; s2, marking and measuring positions of a spherical hinge and a supporting leg of a bridge structure, and recording data of an initial position of a bridge; s3, according to the balance state of the bridge structure, a corresponding single-side jacking weighing experiment in the bridge direction is executed on the bridge structure; and S4, calculating the eccentric distance of the center of gravity of the bridge in the bridge direction and the eccentric distance of the center of gravity of the bridge in the transverse bridge according to the result of the single-side jacking weighing experiment in the bridge direction so as to obtain the center-of-gravity position of the bridge structure under single-side jacking weighing. The asymmetric curve swivel bridge is subjected to the single-side weighing experiment, the gravity center position of the bridge structure can be accurately calculated according to the weighing experiment data and the monitoring data, and it is ensured that the bridge is kept stable in the swivel process.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge rotation construction, and in particular to a method for determining the bidirectional center of gravity position of an asymmetric curved rotation bridge by unilateral jacking and weighing. Background Art

[0002] In the process of continuous improvement of the transportation network, bridge rotation construction is the preferred construction plan for bridges across existing lines. Before the bridge rotation construction, the center of gravity of the bridge structure must be accurately located. The center of gravity positioning of the rotating bridge here is directly related to the rotation force analysis of the bridge and the overall stability of the bridge during the rotation construction process. At the same time, it is also the fundamental prerequisite for the subsequent counterweight adjustment and smooth rotation of the bridge.

[0003] With the increasing demand for rotating bridges across existing lines, the structural forms of bridges have also become diverse, especially asymmetric curved rotating bridges, which not only have a center of gravity offset in the longitudinal direction of the bridge, but also a center of gravity offset in the transverse direction of the bridge. The existing weighing test and analysis methods can only locate the center of gravity of the bridge in the longitudinal direction. Therefore, they are only applicable to straight rotating bridges and are difficult to apply to asymmetric curved rotating bridges. Direct application of the existing weighing test and analysis methods will inevitably lead to an increase in the center of gravity positioning error of asymmetric curved rotating bridges, affecting the safety and stability of the overall structure. In addition, if the center of gravity offset in the transverse direction of the bridge is not fully considered, uneven force may be caused during the bridge rotation construction operation, which not only increases the risk of bridge deformation, but may also cause the bridge to overturn laterally.

[0004] To this end, the present application proposes a method for determining the bidirectional center of gravity position of an asymmetric curved rotating bridge, which is easy to operate and applicable to asymmetric curved rotating bridges, to solve the above technical problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method for determining the bidirectional center of gravity position of an asymmetric curved rotating bridge, so as to solve the technical problems raised in the background technology and provide a more efficient and reliable technical means for accurately locating the center of gravity of a complex bridge structure.

[0006] The present invention adopts the following technical solutions to solve the above technical problems: A method for determining the bidirectional center of gravity of an asymmetric curved rotation bridge comprises the following steps: S1. Remove the sandbox restraints between the upper and lower spherical joints of the asymmetric curved rotation bridge to determine the equilibrium state of the bridge structure; S2. Mark and measure the spherical joints and support legs of the bridge structure, and record the data of the initial position of the bridge; S3. Perform a unilateral jacking and weighing test on the bridge structure in the corresponding longitudinal direction based on the equilibrium state of the bridge structure; S4. Calculate the eccentricity of the bridge's center of gravity along the bridge direction based on the results of the one-sided jacking and weighing test along the bridge direction. and the eccentricity of the bridge's center of gravity in the transverse direction of the bridge , in order to obtain the center of gravity position of the bridge structure under single-side jacking weighing.

[0007] Preferably, the determination of the equilibrium state of the bridge structure after the sand box constraints are removed in step S1 includes: State 1: If the friction torque of the ball joint Greater than the unbalanced moment of the bridge structure , then the bridge structure does not undergo rigid body rotation around the spherical joint; State 2: If the friction torque of the ball joint Less than the unbalanced moment of the bridge structure , the bridge structure performs rigid body rotation around the spherical joint. Preferably, in a state of equilibrium in which the bridge structure does not undergo rigid body rotation around the spherical joint, for an asymmetric curved rotating bridge with its center of gravity located on the long mileage side, the unilateral jacking and weighing test along the bridge in step S3 is as follows: a1. Arrange the jack and displacement meter on the long mileage side of the spherical joint center along the bridge direction; a2. Use a jack to lift the larger mileage side and measure the distance from the jacking force P to the center axis of the ball joint. ; a3. Adjust the jacks and apply force to them step by step synchronously; a4. Record the displacement meter and use the pressure sensor to record the value of the jack until the displacement recorded by the displacement meter changes suddenly; a5. Record the jacking force of each jack when the displacement suddenly changes Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; a6. Draw the top force and record the curve mutation value and ; a7. Unload the jack, move the device symmetrically to the other side of the ball joint, and repeat the above steps to obtain 、 、 , and the curve mutation value and ,in , n is the number of lifting jacks.

[0008] Preferably, in the equilibrium state where the bridge structure does not rotate around the spherical joint, the eccentricity of the bridge center of gravity in the longitudinal direction of the bridge in step S4 is The calculation is based on the weighing experiment principle, and the calculation formula is:

[0009] in, is the rotation weight of the bridge.

[0010] Preferably, in the equilibrium state where the bridge structure does not rotate around the spherical joint, the eccentricity of the bridge center of gravity in the transverse bridge in step S4 is The calculation basis and The equilibrium state is obtained when , and according to the work function theorem, the calculation formula is:

[0011] in, The transverse bridge tilt angle is generated by the transverse bridge height difference. Height difference calculation, is the effective rotation distance of the spherical joint, which is obtained by recording the rotation arc length of the friction action point.

[0012] Preferably, when the bridge structure is in a state of equilibrium with a rigid body rotation about a spherical joint, and the center of gravity of an asymmetric curved rotating bridge is located on the long mileage side, the jacking and weighing test in step S3 along the bridge is as follows: b1. Arrange the jack and displacement meter on the long mileage side of the spherical joint center along the bridge direction; b2. Use a jack to lift the larger mileage side and measure the distance from the jacking force P to the center axis of the ball joint. ; b3. Adjust the jacks and apply force to them step by step synchronously; b4. Record the displacement meter and use the pressure sensor to record the value of the jack until the displacement recorded by the displacement meter shows a sudden change; b5. Record the jacking force of each jack when the displacement suddenly changes Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; b6. Calculate the transverse rotation angle of the spherical joint based on the initial positioning mark of the spherical joint and the position of the spherical joint when the jacking displacement suddenly changes. ; b7. Draw the top force and record the curve mutation value and ; b8. Unload and lower the jack step by step, and record the jacking force of each jack at the moment of sudden displacement. Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; b9. Draw the top force and record the curve mutation value and .

[0013] Preferably, when the bridge structure is in a state of equilibrium with a rigid body rotation about the spherical joint, the eccentricity of the bridge center of gravity in the longitudinal direction of the bridge in step S4 is The calculation is based on the weighing experiment principle, and the calculation formula is:

[0014] in, is the rotation weight of the bridge.

[0015] Preferably, when the bridge structure is in a state of equilibrium with a rigid body rotation about the spherical joint, the eccentricity of the bridge center of gravity in the transverse bridge in step S4 is The calculation basis and The equilibrium state is obtained when , and according to the work function theorem, the calculation formula is:

[0016] in, The transverse bridge inclination angle is generated by the transverse bridge height difference. is the effective rotation distance of the spherical joint, which is obtained by recording the rotation arc length of the friction action point.

[0017] As can be seen from the above technical solution, the present invention provides a method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge. Compared with the prior art, the present invention has the following advantages: 1. The present invention conducts a single-sided weighing test on an asymmetric curved rotating bridge. Based on the weighing test data and monitoring data, the center of gravity of the bridge structure can be accurately calculated. This allows the construction team to adjust the construction plan in a timely manner by accurately grasping the center of gravity position, ensuring that the bridge remains stable during the rotation process, thereby reducing the impact on the surrounding environment and existing infrastructure.

[0018] 2. The present invention adopts a single-side jacking and weighing method, which eliminates the need for complex weighing operations on both sides of the bridge. It can simplify the testing process and reduce the workload of equipment layout and experimental implementation.

[0019] 3. By comprehensively applying the work-efficiency theorem and the principle of moment equilibrium in weighing experiments, this invention establishes equilibrium equations for both the longitudinal and transverse directions. This allows for the precise calculation of the longitudinal eccentricity ∆y and transverse eccentricity ∆x of the bridge's center of gravity, enabling precise positioning of the bidirectional center of gravity of an asymmetric curved rotational bridge.

[0020] 4. The present invention can adapt to the complex structural characteristics and stress conditions of asymmetric curved rotation bridges by designing corresponding experimental arrangements and calculation methods according to different equilibrium states of bridge structures, thereby improving the accuracy and applicability of center of gravity positioning.

[0021] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easy to understand through the following description. Of course, it is not necessary to achieve all of the above-mentioned advantages simultaneously in order to implement any product of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall calculation process of the present invention; Figure 2 It is a schematic diagram of the layout of the weighing experimental facilities of the present invention; Figure 3 It is a schematic diagram of the equilibrium state of the bridge structure of the present invention without rigid body rotation around the spherical joint; Figure 4 It is a schematic diagram of the equilibrium state of the bridge structure of the present invention performing rigid body rotation around the spherical joint; Figure 5 It is a schematic diagram of the lateral eccentric effect of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] In the embodiment, see Figures 1 to 5 .

[0025] like Figure 1 The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge proposed in an embodiment of the present invention includes the following steps: S1. Remove the sand box and determine the equilibrium state of the bridge structure.

[0026] When the sand box constraints between the upper and lower spherical joints are removed, the bridge structure will have the following two equilibrium states: State 1: Friction torque of ball joint Greater than the unbalanced moment of the bridge structure , at this time, the bridge structure does not undergo rigid body rotation around the spherical joint; State 2: Friction torque of ball joint Less than the unbalanced moment of the bridge structure , at this time the bridge structure will perform rigid body rotation around the spherical joint.

[0027] S2. Accurate marking and measurement of bridge structure positions before weighing.

[0028] Before carrying out the weighing test, the positions of the ball joints and supports were marked and measured, and the data of the initial position of the bridge before weighing was recorded.

[0029] S3. Equipment layout and experimental implementation of weighing experiments.

[0030] According to the equilibrium state of the bridge structure, the weighing test equipment (jacks, displacement meters, etc.) is arranged to carry out weighing tests along the bridge direction. The layout diagram of the weighing test facilities is shown in the figure below. Figure 2 shown.

[0031] Equilibrium state 1: spherical joint friction torque Greater than the unbalanced moment of the bridge structure .

[0032] Taking the center of gravity on the long mileage side (right side of the bridge) as an example, the specific implementation steps are as follows: a1. Arrange the jack and displacement meter on the long mileage side of the spherical joint center along the bridge direction; a2. Use a jack to lift the larger mileage side and measure the distance from the jacking force P to the center axis of the ball joint. ; a3. Adjust the jacks and apply force to them step by step synchronously; a4. Record the values ​​of the displacement meter and pressure sensor until the displacement recorded by the displacement meter changes suddenly; a5. Record the top force of each jack at this time Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; a6. Draw the top force and record the curve mutation value and ; a7. Unload the jack, move the device symmetrically to the other side of the ball joint, and repeat the above steps to obtain 、 and curve mutation value and ,in , n is the number of lifting jacks; Equilibrium state 2: spherical joint friction torque Less than the unbalanced moment of the bridge structure .

[0033] Taking the case where the center of gravity is on the long mileage side (right side of the bridge) as an example, the bridge structure will perform a clockwise rigid body rotation around the spherical joint. The specific implementation steps are as follows: b1. Arrange the jack and displacement meter on the long mileage side (right side of the bridge) along the bridge direction from the center of the spherical joint. b2. Use a jack to lift the larger mileage side and measure the distance from the jacking force P to the center axis of the ball joint. ; b3. Adjust the jacks and apply force to them step by step synchronously; b4. Record the values ​​of the displacement meter and pressure sensor until the displacement recorded by the displacement meter changes suddenly; b5. Record the top force of each jack at this time Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; b6. Calculate the spherical joint rotation angle θ based on the initial spherical joint positioning mark and the spherical joint position when the jacking displacement meter suddenly changes; b7. Draw the relationship curve between the top force Ptop and Δtop, and record the curve mutation value and ; b8. Unload and lower the jack step by step, and record the jacking force of each jack at the moment of sudden displacement. Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; b9. The top force is directly drawn by the weighing experiment information system curve, and record the curve mutation value and ; S4. Analyze and calculate the eccentricities ∆x and ∆y of the bridge structure.

[0034] Calculation of the eccentricity ∆y of the bridge center of gravity along the bridge direction: Equilibrium state 1: spherical joint friction torque Greater than the unbalanced moment of the bridge structure , the equilibrium state diagram is as follows Figure 3 shown.

[0035] Based on the principle of weighing experiment, the following equation is listed: Left side lifting:

[0036]

[0037] Right side lifting:

[0038]

[0039] Where n is the number of lifting jacks. Combining the above equations for equilibrium state 1, we can get:

[0040]

[0041] Depend on , we can get the eccentric moment ∆y of the bridge center of gravity along the bridge direction:

[0042] in, is the rotation weight of the bridge.

[0043] Equilibrium state 2: spherical joint friction torque Less than the unbalanced moment of the bridge structure , the equilibrium state diagram is as follows Figure 4 shown.

[0044] Based on the principle of weighing experiment, the following equation is listed: Loading jacking:

[0045]

[0046] Uninstall fallback:

[0047]

[0048] Combining the above equations for equilibrium state 2, we can obtain:

[0049]

[0050] Depend on , we can get the eccentric moment ∆y of the bridge center of gravity along the bridge direction:

[0051] in, is the rotation weight of the bridge.

[0052] Calculation of the eccentricity ∆x of the bridge's center of gravity in the transverse direction: Equilibrium state 1: spherical joint friction torque Greater than the unbalanced moment of the bridge structure .

[0053] The center of gravity of an asymmetric curved bridge is generally not located at the center of the spherical joint, and it not only has eccentricity in the longitudinal direction but also in the transverse direction. When conducting a jacking and weighing test on an asymmetric curved rotating bridge in the longitudinal direction, the unbalanced moment in the transverse direction will cause a height difference in the asymmetric curved bridge in the transverse direction. At this time, the transverse height difference will produce a transverse inclination angle. The schematic diagram of the unbalanced moment acting on the transverse bridge is as follows: Figure 5 shown.

[0054] according to and According to the work-performance theorem, the following equation can be obtained:

[0055]

[0056]

[0057]

[0058]

[0059] The formula of spherical joint friction torque based on equilibrium state 1 is:

[0060] By combining the above equations for equilibrium state 1, we can obtain the eccentricity ∆x of the bridge's center of gravity in the transverse direction:

[0061] Where, is the work done by each jack, is the work done by the lateral unbalanced moment, is the work done by the friction torque of the spherical joint, G is the weight of the bridge rotation, The transverse bridge tilt angle is generated by the transverse bridge height difference. Height difference calculation, is the effective rotation distance of the spherical joint, which is obtained by recording the rotation arc length of the friction action point.

[0062] Equilibrium state 2: spherical joint friction torque Less than the unbalanced moment of the bridge structure .

[0063] according to and According to the work-performance theorem, the following equation can be obtained:

[0064]

[0065]

[0066]

[0067] The formula of spherical joint friction torque based on equilibrium state 1 is:

[0068] By combining the above equations for equilibrium state 2, we can obtain the eccentricity ∆x of the bridge's center of gravity in the transverse direction:

[0069] in, The transverse bridge inclination angle is generated by the transverse bridge height difference. is the effective rotation distance of the spherical joint, which is obtained by recording the rotation arc length of the friction action point.

[0070] In summary, by adopting the method of unilateral jacking and weighing, there is no need to perform complicated weighing operations on both sides of the bridge respectively, which can simplify the test process, reduce the workload of equipment layout and experimental implementation, thereby improving the convenience of operation, saving manpower, material resources and time costs, and efficiently completing the center of gravity positioning work. In addition, by designing corresponding experimental arrangements and calculation methods for different equilibrium states of the bridge structure (the relationship between the friction torque of the spherical hinge and the unbalanced torque), it can adapt to the complex structural characteristics and stress conditions of asymmetric curved rotation bridges, thereby improving the accuracy and applicability of center of gravity positioning, and effectively avoiding In order to eliminate the risk of bridge deformation and lateral overturning caused by center of gravity positioning errors and ensure the safety and stability of bridge construction, in specific positioning calculations, the functional theorem and moment balance principle are comprehensively applied in weighing experiments to establish equilibrium equations in the longitudinal and transverse directions of the bridge, respectively. This can accurately calculate the eccentricity ∆y of the bridge center of gravity in the longitudinal direction and the eccentricity ∆x in the transverse direction of the bridge at the same time, so as to achieve precise positioning of the bidirectional center of gravity position of the asymmetric curved rotation bridge, providing a reliable basis for the rotation force analysis, overall stability assurance and subsequent counterweight adjustment of the bridge rotation construction, and ensure that the bridge is smoothly rotated into place.

[0071] Through the above steps, unilateral jacking and weighing can be achieved. At this time, by conducting a unilateral weighing test on the asymmetric curved rotating bridge, the center of gravity position of the bridge structure can be accurately calculated based on the weighing test data and monitoring data. At this time, it is convenient to further accurately grasp the center of gravity position, so that the construction team can adjust the construction plan in time to ensure that the bridge remains stable during the rotation process, thereby reducing the impact on the surrounding environment and existing infrastructure.

[0072] On the other hand, the present invention further discloses a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above calculation method.

[0073] In another embodiment provided in the present application, a computer program product containing instructions is also provided. When the computer is run on the computer, the computer executes any calculation method for determining the bidirectional center of gravity position of an asymmetric curved rotation bridge in the above embodiments.

[0074] It is understandable that the system provided by the embodiment of the present invention corresponds to the method provided by the embodiment of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts of the above method.

[0075] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.

[0076] 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, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0077] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0078] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, in the embodiments of the present invention, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge, characterized in that: The following steps are involved: S1. Remove the sandbox restraints between the upper and lower spherical joints of the asymmetric curved rotation bridge to determine the equilibrium state of the bridge structure; S2. Mark and measure the spherical joints and support legs of the bridge structure, and record the data of the initial position of the bridge; S3. Perform a unilateral jacking and weighing test on the bridge structure in the corresponding longitudinal direction based on the equilibrium state of the bridge structure; S4. Calculate the eccentricity of the bridge's center of gravity along the bridge direction based on the results of the one-sided jacking and weighing test along the bridge direction. and the eccentricity of the bridge's center of gravity in the transverse direction of the bridge , in order to obtain the center of gravity position of the bridge structure under single-side jacking weighing.

2. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 1, wherein: The determination of the equilibrium state of the bridge structure after the sand box constraints are removed in step S1 includes: State 1: If the friction torque of the ball joint Greater than the unbalanced moment of the bridge structure , then the bridge structure does not undergo rigid body rotation around the spherical joint; State 2: If the friction torque of the ball joint Less than the unbalanced moment of the bridge structure , the bridge structure performs rigid body rotation around the spherical joint.

3. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 2, wherein: In the equilibrium state where the bridge structure does not undergo rigid body rotation around the spherical joint, for an asymmetric curved rotation bridge with its center of gravity located on the larger mileage side, the unilateral jacking and weighing test along the bridge in step S3 is as follows: a1. Arrange the jack and displacement meter on the long mileage side of the spherical joint center along the bridge direction; a2. Use a jack to lift the larger mileage side and measure the distance from the jacking force P to the center axis of the ball joint. ; a3. Adjust the jacks and apply force to them step by step synchronously; a4. Record the displacement meter and use the pressure sensor to record the value of the jack until the displacement recorded by the displacement meter changes suddenly; a5. Record the jacking force of each jack when the displacement suddenly changes Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; a6. Draw the top force and record the curve mutation value and ; a7. Unload the jack, move the device symmetrically to the other side of the ball joint, and repeat the above steps to obtain 、 、 , and the curve mutation value and ,in , n is the number of lifting jacks.

4. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 3, wherein: In the equilibrium state where the bridge structure does not rotate around the spherical joint, the eccentricity of the bridge center of gravity in the direction of the bridge in step S4 is The calculation is based on the weighing experiment principle, and the calculation formula is: in, is the rotation weight of the bridge.

5. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 4, characterized in that: In the equilibrium state where the bridge structure does not rotate around the spherical joint, the eccentricity of the bridge center of gravity in the transverse bridge in step S4 is The calculation basis and The equilibrium state is obtained when , and according to the work function theorem, the calculation formula is: in, The transverse bridge tilt angle is generated by the transverse bridge height difference. Height difference calculation, is the effective rotation distance of the spherical joint, which is obtained by recording the rotation arc length of the friction action point.

6. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 2, wherein: When the bridge structure is in a state of equilibrium with a rigid body rotation about the spherical joint, and the center of gravity of the asymmetric curved rotating bridge is located on the larger mileage side, the unilateral jacking and weighing test along the bridge in step S3 is: b1. Arrange the jack and displacement meter on the long mileage side of the spherical joint center along the bridge direction; b2. Use a jack to lift the larger mileage side and measure the distance from the jacking force P to the center axis of the ball joint. ; b3. Adjust the jacks and apply force to them step by step synchronously; b4. Record the displacement meter and use the pressure sensor to record the value of the jack until the displacement recorded by the displacement meter shows a sudden change; b5. Record the jacking force of each jack when the displacement suddenly changes Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; b6. Calculate the transverse rotation angle of the spherical joint based on the initial positioning mark of the spherical joint and the position of the spherical joint when the jacking displacement suddenly changes. ; b7. Draw the top force and record the curve mutation value and ; b8. Unload and lower the jack step by step, and record the jacking force of each jack at the moment of sudden displacement. Displacement value corresponding to the displacement meter ,in , n is the number of lifting jacks; b9. Draw the top force and record the curve mutation value and .

7. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 6, characterized in that: When the bridge structure is in a state of equilibrium with a rigid body rotation around the spherical joint, the eccentricity of the bridge center of gravity in the direction of the bridge in step S4 is The calculation is based on the weighing experiment principle, and the calculation formula is: in, is the rotation weight of the bridge.

8. The method for determining the bidirectional center of gravity of an asymmetric curved rotating bridge according to claim 7, wherein: When the bridge structure is in a state of equilibrium with a rigid body rotation about the spherical joint, the eccentricity of the bridge center of gravity in the transverse bridge in step S4 is The calculation basis and The equilibrium state is obtained when , and according to the work function theorem, the calculation formula is: in, The transverse bridge inclination angle is generated by the transverse bridge height difference. is the effective rotation distance of the spherical joint, which is obtained by recording the rotation arc length of the friction action point.

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