Weighing-free construction method for flat-turning bridge based on intelligent supporting leg device

Abstract

The invention relates to a weighing-free construction method for a flat-turning bridge based on an intelligent supporting leg device, which takes the intelligent supporting leg device as a core technical carrier, monitors the stress condition borne by a supporting leg in real time through a built-in stress sensor, and judges whether the stress state of a turning structure meets a locking condition or not; meanwhile, a stress sensor arranged in the intelligent supporting foot device is used for measuring and recording an initial stress value of the intelligent supporting foot device, and the initial stress value serves as basic data of follow-up analysis. Before a bridge rotates, temporary locking of the intelligent supporting foot device needs to be relieved, temporary constraint between an upper rotating disc and a lower rotating disc needs to be relieved, then the stress value of the supporting foot device is measured again, the measured value serves as a final stress value, and stress change data of the bridge structure in the constraint relieving state is obtained by comparing the difference between the initial stress value and the final stress value. The method has the advantages that through accurate stress measurement and scientific calculation analysis, under the condition that traditional balance weight weighing operation is not needed, accurate construction control over the swivel bridge is achieved, and safety and stability of the bridge swivel process are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a weighing-free construction method for a horizontally rotating bridge based on an intelligent support leg device. Background Art

[0002] With the continued expansion and upgrading of road and rail transportation networks, a surge in demand has emerged in recent years for bridge construction across existing lines. Whether using traditional cast-in-place scaffolding, cantilever casting, or the efficient jacking method, these construction methods inevitably disrupt and impact existing traffic flow. Against this backdrop, bridge rotation construction technology, with its unique advantages, has emerged as an effective solution to this challenge. This technology primarily includes horizontal rotation, vertical rotation, and a hybrid rotation method combining the two, each adaptable to different project conditions and requirements.

[0003] In recent years, the field of bridge rotation construction technology has seen significant and rapid progress. The weight of rotating structures has leapt from several thousand tons in the early days to tens of thousands, and even tens of thousands, of tons today. Given the complexity and uncertainty inherent in bridge rotation, even the slightest error can cause the structure to deviate from its ideal equilibrium, posing a potential threat to the bridge's overall safety and stability. Therefore, prior to bridge rotation construction, conducting detailed and precise unbalanced weighing tests, as well as in-depth research and application of counterweight technology, are crucial and important.

[0004] During the construction of a rotating bridge, specific measures are implemented to balance the bridge's unbalanced loads to ensure stability and safety during the rotation process. Sandboxes, a widely used temporary stabilizing support structure, are typically installed at specific locations along the slideway to support the unbalanced load before the bridge counterweight is applied. However, the removal of the sandboxes, in addition to being complex, can easily contaminate the slideway and ball joints, negatively impacting the bridge's rotational performance and hindering the smooth progress of subsequent bridge rotation operations. Summary of the Invention

[0005] The purpose of the present invention is to provide a weighing-free construction method for a horizontally rotating bridge based on an intelligent support leg device in response to the above-mentioned shortcomings of the existing technology. Through structural design, real-time high-precision detection and collection of the stress conditions borne by the support legs can be achieved, so as to judge whether the stress state of the rotating structure meets the bridge rotation locking conditions. Without the need for traditional counterweight weighing operations, precise construction control of the rotating bridge can be achieved, ensuring the safety and stability of the bridge rotation process.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A weighing-free construction method for a horizontally rotating bridge based on an intelligent support device is characterized by comprising the following steps:

[0008] Step 1. Install the intelligent support devices symmetrically to the designated locations on the lower platform according to the design drawings. Ensure that each intelligent support device is securely connected and the locking mechanism is properly debugged. Calibrate the stress sensors of each intelligent support device using a standard load to ensure data acquisition accuracy. Verify the signal transmission stability between the sensor and control system using the data acquisition system.

[0009] Step 2: After the construction of the bridge superstructure is completed, stress data from all intelligent support devices is collected in real time through stress sensors. Based on the stress data analysis results, a strategy for adjusting the unbalanced bending moment of the rotating structure is determined. If the unbalanced bending moment is small, it can be adjusted by fine-tuning the lifting or retraction of the intelligent support device. If the unbalanced bending moment is large, it may be necessary to combine adjustments with methods such as adding or removing counterweights at the beam ends. For example, when the stress sensor indicates that the stress of the intelligent support device on one side is excessive and it is determined that a large negative bending moment exists on that side, the intelligent support device on the opposite side can be appropriately lifted to reduce the pressure on that side. After completing an adjustment operation, continue to monitor the stress sensor readings and the status of the rotating structure in real time. Based on the new data feedback, determine whether the expected unbalanced bending moment adjustment effect has been achieved. If not, analyze the data again and further fine-tune the intelligent support device until the unbalanced bending moment of the rotating structure is adjusted to a reasonable range to ensure the stability and safety of the rotating structure.

[0010] Step 3: Use the hydraulic mechanism built into the intelligent support leg device to fine-tune the support leg height, placing the swivel structure in a "slightly detached" state (i.e., the slide is in contact with the swivel ball joint but not under force). At this point, the support legs bear the entire weight of the structure. Using stress sensor data as feedback, the lifting amount of multiple support leg groups is synchronously adjusted to ensure that the stress difference between each support leg is ≤5% to avoid local overload. After locking, let it stand for 30 minutes and monitor whether the support leg stress fluctuates by ≤2%. If the stress is stable, the locking is effective; if the stress continues to fluctuate, the locking mechanism needs to be readjusted or the structural connection needs to be checked.

[0011] If the stress of a certain support leg is higher than the average, appropriately reduce its lifting height and transfer the load to other support legs;

[0012] If the overall stress is low, check whether there is a problem of loose structural support.

[0013] Step 4: After the overall construction of the bridge is completed and meets the design requirements, the temporary lock of the intelligent support device is released as needed, and the support stress data after locking is continued to be monitored and recorded as the baseline value when the rotation is started. It is compared with the design documents to confirm that it is correct to ensure the safety and stability of the rotating structure in the temporary locked state, ensure that the release process is smooth and safe, and avoid adverse effects on the structure.

[0014] Step 5: Calculate the imbalance using stress data. Built-in stress sensors measure stress changes in the support legs under different operating conditions. Based on the relationship between stress and force and the principles of structural mechanics, the unbalanced force and unbalanced moment of the rotating structure are calculated. During bridge rotation construction, the stress sensors in the support leg force measuring device measure the support reaction force of each support leg. Combined with the reaction torque generated by each support reaction force on the center of the spherical joint and the maximum static friction torque measured by the spherical joint, the unbalanced moment of the rotating structure is estimated using the principle of torque balance.

[0015] Step 6: Adjust the counterweight based on the calculated results. Depending on the calculated unbalanced moment, place a counterweight at the top of the rotating structure or another suitable location to adjust the structure's center of gravity and reduce the unbalanced moment. During the counterweighting process, continuously monitor the data from the stress sensors to monitor the force changes on the legs in real time and assess the counterweighting effectiveness until the eccentricity of the rotating structure meets the requirements for rotation construction, achieving precise control of the counterweight without weighing.

[0016] Principles for determining counterweight position:

[0017] ① Maximize the lever arm: Prioritize the repositioning of the counterweight at the cantilever end of the rotating bridge (both ends of the T-structure) to maximize L p To reduce G p .

[0018] ② Direction matching: If To generate a clockwise moment (the right side of the beam tilts upward), the counterweight should be placed at the right cantilever end to generate a counterclockwise moment.

[0019] ③ Eccentricity control: total weight after counterweight: N = N0 + G p , the eccentricity after counterweight must meet

[0020] Initial unbalanced moment M unb0 During the construction of the rotating bridge superstructure, the actual concrete pouring volume on both sides of the T-structure was recorded, the eccentric load of the rotating structure was preliminarily judged, and the unbalanced moment M during the temporary locking stage was determined. unb0 At this time, the moment provided by the temporary lock is expressed as M y .

[0021] M unb0 =M y

[0022] Before the formal rotation, the temporary locking device must be released according to the process, and the stress sensor is used to monitor the stress change of the bridge support device before and after the release in real time. Based on the Hooke's law formula in material mechanics, the quantitative relationship between the measured stress of the support and the support reaction force can be established through the conversion relationship between stress-strain-load: R f =σ×A

[0023] Where: A is the cross-sectional area of ​​the support leg; σ is the measured stress; R f is the support reaction force.

[0024] Accurate calculation of unbalanced moments is crucial to the success of bridge rotation and structural safety. After the intelligent support leg device is temporarily locked and released, the unbalanced moments are primarily composed of the reaction torque generated by the support leg and the static friction torque of the spherical joint. The former stems from the asymmetric load on the rotating portion of the bridge, while the latter is caused by the friction between the contact surfaces of the spherical joint when they are relatively stationary. Using the center of the spherical joint as the reference point and based on the principle of mechanical equilibrium, the equilibrium equation is established by analyzing the magnitude, direction, and lever arm of each force: M unb =M R +M zmax

[0025] Where: M unb The unbalanced torque after the intelligent foot support device is temporarily locked and released; M zmax is the maximum static friction torque of the ball joint; M R is the algebraic sum of the moments of the reaction forces of the support legs about the center of the spherical joint.

[0026] Calculate the maximum static friction moment M based on the friction coefficient reference value provided by the ball joint manufacturer zmax , calculated as follows:

[0027] M zmax =μN o R

[0028] Where: μ is the static friction coefficient of the spherical joint; N o is the weight of the horizontally rotating bridge before counterweight; R is the radius of curvature of the spherical joint.

[0029] The algebraic sum of the moments of the reaction force of the support leg on the center of the spherical joint

[0030] Where: M R is the algebraic sum of the moments of the reaction force of the contact support about the center of the spherical joint; is the support reaction of each support leg; L i It is the horizontal distance from the support foot to the center of the ball joint.

[0031] The balance equation of the counterweight moment is: To balance the rotating bridge, the moment M generated by the counterweight p =G p L p Need to offset the unbalanced moment M unb =M R +M zmax ,Right now

[0032] The counterweight is calculated as follows:

[0033]

[0034] Where: M p is the counterweight moment; G p is the weight of the counterweight; L p It is the horizontal distance between the counterweight and the center of the ball joint.

[0035] After completing the counterweight, the total weight is: N = N0 + G p , the eccentricity after counterweight must meet the following requirements:

[0036]

[0037] The advantages of the present invention are:

[0038] 1) An intelligent support leg device is used as a temporary locking structure. Compared with the traditional sand box, the introduction of the intelligent support leg device solves the problem of easy contamination of the slideway and ball joint during the unbalanced weighing and removal of the sand box before the bridge rotation. It simplifies the temporary locking construction process and efficiently realizes the temporary locking of the rotating structure.

[0039] 2) The counterweight method is easy to operate and does not require weighing the beam body. It can significantly reduce construction labor intensity and avoid the problem of low accuracy of beam counterweight operations caused by manual operation and environmental factors.

[0040] 3) Compared with the traditional weighing and counterweighting method, the counterweighting method of the present invention has fewer operating steps, eliminating the tedious process of weighing-counterweighting-re-weighing-re-counterweighting... in the traditional counterweight weighing method, significantly improving the efficiency of bridge rotation construction, shortening the construction period and reducing construction costs.

[0041] 4) Stress sensors collect real-time support leg stress data, providing high-frequency, high-precision measurements of the force distribution of the rotating structure at each construction stage, enabling dynamic tracking of the structural equilibrium state. Comparing stress readings from supports in different locations, combined with data analysis and early warning mechanisms, can quickly identify potential imbalances such as structural eccentricity and uneven loading, locating the root cause of the problem.

[0042] 5) Based on real-time data feedback, targeted adjustment measures are taken (such as optimizing load distribution and slightly lifting the support legs) to achieve a closed-loop control of "monitoring-analysis-regulation" for force balance, with fast response speed and high adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a layout diagram of the intelligent leg support device of the present invention;

[0044] Figure 2 Schematic diagram of the structure of the intelligent leg support device of the present invention;

[0045] Figure 3This is a simplified diagram of the forces acting on the counterweight front swivel bridge of the present invention;

[0046] Figure 4 The force of the swivel bridge after the counterweight in the present invention is shown in the figure;

[0047] Figure 5 This is a cross-sectional view of the structure of the intelligent leg support device of the present invention;

[0048] Figure 6 Schematic diagram of the structure of the hydraulic mechanism of the intelligent leg support device of the present invention;

[0049] Figure 7 Schematic diagram of the structure of the guide locking assembly of the intelligent leg support device in the present invention. DETAILED DESCRIPTION

[0050] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0051] like Figure 1-7 As shown, the various marks respectively represent: outer sleeve 1, inner sleeve 2, hydraulic mechanism 3, hydraulic cylinder 31, mounting base 32, mounting top plate 33, displacement sensor 34, stabilizing assembly 35, support foot base 4, support foot support plate 5, spring 6, guide locking assembly 7, guide sleeve 71, guide rod 72, locking bolt 73, bolt slot 74, quick connector 8, and connection part 9.

[0052] Example: Figures 1 to 7 As shown, the weighing-free construction method for a horizontally rotating bridge based on an intelligent support device in this embodiment includes the following steps:

[0053] Step 1. Install the intelligent support leg device symmetrically to the designated position on the lower platform according to the design drawings. Ensure that the support leg device is securely connected and the locking mechanism is properly debugged. Calibrate the support leg stress sensor using a standard load to ensure data acquisition accuracy. Verify the signal transmission stability between the sensor and the control system using the data acquisition system.

[0054] Combine Figure 2 、 5 As shown in Figures 6 and 7, the intelligent support leg device used for the weighing-free construction of a horizontally rotating bridge in this embodiment mainly includes an outer sleeve 1, an inner sleeve 2, a hydraulic mechanism 3, a support leg base plate 4, a support leg support plate 5, and a guide locking assembly 7.

[0055] The outer sleeve 1 is mounted on the bottom of the inner sleeve 2, with the two structures fitting snugly and their inner cavities communicating. A foot support plate 4 is located at the bottom of the outer sleeve 1, removably connected to the bridge's lower abutment via bolts. A foot support plate 5 is located at the top of the inner sleeve 2, removably connected to the bridge's lower abutment via bolts. The foot support plate 4 and support plate 5 securely secure the entire foot support assembly between the upper and lower abutments of the bridge.

[0056] A hydraulic mechanism 3 is located within the inner cavity of the inner sleeve 2. This mechanism includes a hydraulic cylinder 31, a mounting base 32, a mounting top plate 33, and a displacement sensor 34. The mounting base 32 is located at the bottom of the cylinder barrel of the hydraulic cylinder 31, rigidly connecting the hydraulic cylinder 31 to the outer sleeve 1 via the mounting base 32. The mounting top plate 33 is located at the top of the piston rod of the hydraulic cylinder 31, rigidly connecting the hydraulic cylinder 31 to the inner sleeve 2 via the mounting base 33. The displacement sensor 34 is removably mounted on the piston rod of the hydraulic cylinder 31 to monitor the extension length of the inner sleeve 2. A stress sensor is connected to the connection 9 between the mounting base 32 and the outer sleeve 1. This connection 9 generates complex stress states when subjected to load. Installing a stress sensor at this connection allows monitoring of the stress conditions at the connection, ensuring connection reliability. During use, the hydraulic cylinder 31 drives the inner sleeve 2 to move up and down precisely and stably on the outer sleeve 1. A buffer spring 6 is provided around the outer periphery of the inner sleeve 2 to ensure effective cushioning in the event of a hydraulic cylinder 31 failure.

[0057] In this embodiment, a stabilizing assembly 35 is further provided at the top of the cylinder barrel of the hydraulic cylinder 31. The stabilizing assembly 35 is located outside the piston rod of the hydraulic cylinder 31. The stabilizing assembly includes three groups of connecting rods evenly distributed along the axial direction and guide wheels located at the ends of the connecting rods. When the inner sleeve 2 is raised or lowered, each guide wheel can roll along the inner wall of the inner sleeve 2, thereby further ensuring the verticality and stability of the inner sleeve 2 during the raising and lowering. Figure 2 In the figure, for the convenience of demonstration, the guide wheel at the end of the connecting rod does not contact the inner wall of the inner sleeve 2, but in actual use, the guide wheel contacts the inner wall of the inner sleeve 2.

[0058] In this embodiment, a quick-connect connector 8 is provided on the outer sleeve 1. This connector allows for rapid connection between the hydraulic cylinder 31 and the hydraulic oil circuit of the external pump station, ensuring smooth hydraulic oil transmission. A pressure sensor and oil level sensor are installed on the external pump station to monitor system pressure and oil status in real time, automatically shutting down the system and issuing an alarm in the event of an abnormality.

[0059] A guide locking assembly 7 is provided between the outer sleeve 1 and the inner sleeve 2 to limit the lifting and lowering movement of the inner sleeve 2. The guide locking assembly 7 comprises a guide sleeve 71 and a guide rod 72. The guide sleeve 71 is mounted on the exterior of the guide rod 72 and is secured to the outer wall of the outer sleeve 1. The guide rod 72 is secured to the outer wall of the inner sleeve 2. The inner wall of the guide sleeve 71 is provided with a guide groove that tightly engages with the guide rod 72, allowing the inner sleeve 2 to perform linear motion (lifting and lowering movement) along the direction defined by the guide sleeve 71.

[0060] In this embodiment, a locking device is provided between the guide sleeve 71 and the guide rod 72. The locking device includes a locking bolt 73 provided on the guide sleeve 71 and a bolt notch 74 provided on the guide rod 72. When the inner sleeve 2 is moved to the desired position, the locking bolt 73 on the guide sleeve 71 is tightened so that the end of the locking bolt 73 is inserted into the bolt notch 74 on the guide rod 72. The nut and the locking bolt 73 cooperate with each other to prevent the guide rod 72 from further moving within the guide sleeve 71, thereby fixing the relative positions of the inner sleeve 2 and the outer sleeve 1, achieving a locking function, ensuring that the inner and outer sleeves do not slip relative to each other during the rotation of the bridge, thereby reliably fixing the height of the support leg.

[0061] Step 2: After the construction of the bridge superstructure is completed, stress data of all intelligent support devices are collected in real time through stress sensors. Based on the results of the stress data analysis, a strategy for adjusting the unbalanced bending moment of the rotating structure is determined. If the unbalanced bending moment is small, it can be adjusted by fine-tuning the lifting or retraction of the intelligent support device. If the unbalanced bending moment is large, it may be necessary to combine adjustments with methods such as adding or removing counterweights at the beam ends. For example, when the stress sensor shows that the stress on a certain side of the support leg is too large and it is judged that there is a large negative bending moment on that side, the support leg on the opposite side can be appropriately lifted to reduce the pressure on that side. After completing an adjustment operation, continue to monitor the stress sensor readings and the status of the rotating structure in real time. Based on the new data feedback after the adjustment is completed, determine whether the expected unbalanced bending moment adjustment effect has been achieved. If not, analyze the data again and further fine-tune the intelligent support device until the unbalanced bending moment of the rotating structure is adjusted to a reasonable range to ensure the stability and safety of the rotating structure.

[0062] Step 3: Fine-tune the support leg height through hydraulic mechanism 3, so that the swivel structure is in a state of "slightly disengaged" from the slideway (i.e., the slideway is in contact with the swivel ball joint but is not under force). At this time, the intelligent support leg device bears the entire weight of the structure. Using the stress sensor data as feedback, the lifting amount of multiple sets of support legs is synchronously adjusted to ensure that the stress difference between each support leg is ≤5% to avoid local overload. After locking is completed, let it stand for 30 minutes and monitor whether the support leg stress fluctuates by ≤2%. If the stress is stable, it indicates that the locking is effective; if the stress continues to change, it is necessary to readjust the locking mechanism or check the structural connection.

[0063] If the stress of a certain intelligent support device is higher than the average value of the other intelligent support devices, appropriately reduce its lifting height and transfer the load to other intelligent support devices; if the stress of the entire intelligent support device is too low, check whether there is a problem of loose structural support.

[0064] Step 4: After the overall construction of the bridge is completed and meets the design requirements, the temporary lock of the intelligent support device is released as needed, and the support stress data after locking is continued to be monitored and recorded as the baseline value when the rotation is started. It is compared with the design documents to confirm that it is correct to ensure the safety and stability of the rotating structure in the temporary locked state, ensure that the release process is smooth and safe, and avoid adverse effects on the structure.

[0065] Step 5: Calculate the imbalance using stress data: Built-in stress sensors measure stress changes in the support legs under different operating conditions. Based on the relationship between stress and force and the principles of structural mechanics, the unbalanced force and unbalanced moment of the rotating structure are calculated. During bridge rotation construction, the stress sensors in the support leg force measuring device measure the support reaction force of each support leg. Combined with the reaction torque generated by each support reaction force on the center of the spherical joint and the maximum static friction torque measured by the spherical joint, the unbalanced moment of the rotating structure is estimated using the principle of torque balance.

[0066] Step 6: Adjust the counterweight based on the calculated results. Depending on the calculated unbalanced moment, place a counterweight at the top of the rotating structure or another suitable location to adjust the structure's center of gravity and reduce the unbalanced moment. During the counterweighting process, continuously monitor the data from the stress sensors to monitor the force changes on the legs in real time and assess the counterweighting effectiveness until the eccentricity of the rotating structure meets the requirements for rotation construction, achieving precise control of the counterweight without weighing.

[0067] Principles for determining counterweight position:

[0068] ① Maximize the lever arm: Prioritize the repositioning of the counterweight at the cantilever end of the rotating bridge (both ends of the T-structure) to maximize L p To reduce G p .

[0069] ② Direction matching: If To generate a clockwise moment (the right side of the beam tilts upward), the counterweight should be placed at the right cantilever end to generate a counterclockwise moment.

[0070] ③ Eccentricity control: total weight after counterweight: N = N0 + G p , the eccentricity after counterweight must meet

[0071] During the specific implementation of this embodiment: the displacement sensor 34 may adopt a sensor of model PTS-4205000, which is connected to an external control system, and monitors the extension length of the inner sleeve 2 in real time through the intelligent control system, accurately controls the height of the support legs with an accuracy of ±1mm, and can link multiple groups of support legs for synchronous adjustment to adapt to the posture adjustment during the rotation of the bridge.

[0072] This embodiment uses an intelligent support leg device as its core technology carrier, aiming to fundamentally optimize the temporary locking link in the construction process of the rotating structure, and innovatively achieve a technological breakthrough in the construction process of the rotating bridge without the need for traditional weighing and counterweights. The intelligent support leg device provides precise constraints and guidance for the movement of the inner sleeve by virtue of the special cooperation between the guide sleeve and the guide rod. The guide groove on the inner wall of the guide sleeve is tightly fitted with the guide rod on the outer wall of the inner sleeve, limiting the inner sleeve to linear motion along the direction defined by the guide sleeve, thereby effectively ensuring the accuracy and stability of the relative movement between the inner sleeve and the outer sleeve, and eliminating shaking or offset. The stress sensor built into the intelligent support leg device accurately monitors the stress conditions borne by the support leg in real time and transmits the data to the control system. The control system determines whether the stress state of the rotating structure meets the locking conditions by analyzing the stress data. When the stress change trend is stable and the force difference of each support leg is within the allowable range, it means that the rotating structure is in a relatively balanced state and meets the conditions for temporary locking. In addition, the stress sensor built into the intelligent support leg device is used to measure its initial stress value and record it as basic data for subsequent analysis. Before the bridge rotates, the temporary lock of the intelligent support device must be released, the temporary constraint between the upper and lower turntables must be released, and then the stress value of the support device must be measured again, and this measured value is used as the final stress value. By comparing the difference between the initial and final stress values, the stress change data of the bridge structure in the unconstrained state is obtained. Based on the basic principles of mechanics and combined with the high-precision data collected by the stress sensor, a force calculation model that conforms to the actual working conditions of the rotating bridge is established. Through numerical calculation and analysis, the unbalanced moment of the rotating bridge is accurately calculated. Based on this, the mechanical equilibrium theory is used to reversely calculate the counterweight weight, optimal counterweight position and its eccentricity required to achieve a smooth rotation of the bridge. Therefore, through precise stress measurement and scientific calculation and analysis, precise construction control of the rotating bridge is achieved without the need for traditional counterweight weighing operations, ensuring the safety and stability of the bridge rotation process.

[0073] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described in detail here.

Claims

1. A weighing-free construction method for a horizontally rotating bridge based on an intelligent support device, characterized in that: The non-weighing construction method of the horizontal rotation bridge comprises the following steps: Install several intelligent support devices symmetrically at the designed positions on the bridge's lower platform; After the construction of the bridge superstructure is completed, the stress data of all the intelligent support devices are collected in real time through the stress sensors of the intelligent support devices, and the strategy for adjusting the unbalanced bending moment of the rotating structure is determined based on the stress data analysis results; The hydraulic mechanism of the intelligent leg support device fine-tunes its height, placing the swivel structure in a slightly detached state where the slideway and the swivel ball joint are in contact but not under force, and the intelligent leg support device bears the entire structural weight. Using stress sensor data as feedback, the fixed height adjustment of multiple sets of intelligent leg support devices is synchronized to ensure that locking requirements are met. After the overall construction of the bridge is completed and meets the design requirements, the temporary lock of the intelligent support device will be released as needed, and the stress data after locking will continue to be monitored and recorded as the benchmark value when the rotation starts; The imbalance is calculated using stress data. Built-in stress sensors measure stress changes in the support legs under different working conditions. Based on the relationship between stress and force and the principles of structural mechanics, the unbalanced force and unbalanced moment of the rotating structure are calculated. During bridge rotation construction, the stress sensors in the intelligent support leg device measure the support reaction force of each support leg. Combined with the reaction torque generated by each support reaction force on the center of the spherical joint and the maximum static friction torque of the spherical joint measured, the unbalanced moment of the rotating structure is estimated using the principle of torque balance. The counterweight is adjusted based on the calculation results. According to the calculated unbalanced moment, a counterweight is set at the top of the rotating structure or other suitable position to adjust the center of gravity of the structure and reduce the unbalanced moment. During the counterweighting process, the data of the stress sensor is continuously monitored to grasp the force changes of the support legs in real time and judge the counterweight effect until the gravity eccentricity of the rotating structure meets the requirements of the rotation construction, thus realizing precise control of the counterweight without weighing.

2. The weighing-free construction method for a horizontally rotating bridge based on an intelligent support device according to claim 1 is characterized in that: When the unbalanced bending moment of the rotating structure is small, it is adjusted by fine-tuning the lifting amount or retraction amount of the intelligent support device; when the unbalanced bending moment of the rotating structure is large, it is adjusted in a coordinated manner by adding or removing counterweight blocks at the beam ends.

3. The weighing-free construction method for a horizontally rotating bridge based on an intelligent support device according to claim 1 is characterized in that: Using stress sensor data as feedback, ensure that the stress difference of each smart leg support device is ≤5%; after locking is completed, let it stand for a period of time and monitor whether the stress fluctuation of each smart leg support device is ≤2%; If the stress is stable, the locking is effective. If the stress continues to change, readjust the locking mechanism or check the structural connection.

4. The weighing-free construction method for a horizontally rotating bridge based on an intelligent support device according to claim 1 is characterized in that: Among the stress data of several smart support legs, if the stress of a certain smart support leg device is higher than the average, its lifting height should be appropriately reduced to transfer the load to other support legs; if the overall stress is too low, check whether there is a problem of loose structural support.

5. The weighing-free construction method for a swivel bridge based on an intelligent support device according to claim 1 is characterized in that: During the balancing process, the data from the stress sensor is continuously monitored, the force changes of the intelligent support device are grasped in real time, and the balancing effect is judged until the gravity eccentricity of the rotating structure meets the requirements of the rotation construction, realizing precise control of the balancing without weighing.

6. The weighing-free construction method for a swivel bridge based on an intelligent support device according to claim 1 is characterized in that: The principle for determining the counterweight position is: Maximize the lever arm: Prioritize the counterweight configuration at the cantilever end of the rotating bridge to maximize the distance L between the counterweight and the center of the spherical joint. p To reduce the weight of the counterweight G p ; Direction Match: If is a clockwise moment, and the counterweight is located at the right cantilever end, generating a counterclockwise moment, where R f is the support reaction, L i It is the horizontal distance between the support foot and the center of the ball joint; Eccentricity control: total weight after counterweight: N = N0 + G p , the eccentricity after counterweight must meet Where N o is the weight of the horizontally rotating bridge before counterweight, G p is the weight of the counterweight, M unb The unbalanced torque after the intelligent foot support device is temporarily locked and released, L p It is the horizontal distance between the counterweight and the center of the ball joint.

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