Interactive control method for main arch rib installation line shape of large-span tied arch bridge

Abstract

The invention discloses an interactive control method for a main arch rib installation line shape of a large-span tied arch bridge. The interactive control method comprises the steps that a main arch rib installation model of the large-span tied arch bridge is established; mounting the main arch rib according to the main arch rib mounting model and a preset mounting mode; in the installation process, installation data are obtained and input into the linear and stability analysis model, and linear and stability analysis results are output; and adjusting a main arch rib installation strategy according to a linear and stability analysis result. And the main arch rib is installed on the basis of the main arch rib installation model and the preset installation mode, installation data are input into the linear and stability analysis model, linear and stability analysis results are output, installation instability and quality problems are avoided, and construction safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of arch rib installation, and particularly relates to an interactive control method for the installation alignment of the main arch rib of a long-span tied arch bridge. Background Art

[0002] Long-span tied arch bridges mainly adopt steel box arch ribs. The time-varying characteristics of meteorological parameters such as solar radiation, air temperature, and wind speed will inevitably cause the real-time change of the structural temperature field, resulting in uneven temperature distribution of the arch rib and the temperature difference between the cable and the structure during the cable-hoisting construction of the arch bridge, thus causing significant temperature deformation. In the prior art, the main arch rib is divided into several segments. After being fabricated in a factory or a pre-assembly yard, it is hoisted to the bridge site, installed segment by segment from the arch foot to the mid-span, docked with the already installed segments, and fixed by inclined pulling with stay cables until the mid-span is closed. During the installation process, the lack of linear and stability analysis of the installation data will lead to unstable installation and quality problems, and there are potential safety hazards. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the above technologies to some extent. For this purpose, the object of the present invention is to provide an interactive control method for the installation alignment of the main arch rib of a long-span tied arch bridge, which installs the main arch rib based on the main arch rib installation model and the preset installation method, inputs the installation data into the linear and stability analysis model, outputs the linear and stability analysis results, avoids unstable installation and quality problems, and improves the construction safety.

[0004] To achieve the above object, an embodiment of the present invention provides an interactive control method for the installation alignment of the main arch rib of a long-span tied arch bridge, including:

[0005] Establishing a main arch rib installation model of a long-span tied arch bridge;

[0006] Installing the main arch rib according to the main arch rib installation model and the preset installation method;

[0007] During the installation process, obtaining the installation data, inputting the installation data into the linear and stability analysis model, and outputting the linear and stability analysis results;

[0008] Adjusting the main arch rib installation strategy according to the linear and stability analysis results.

[0009] According to some embodiments of the present invention, establishing a main arch rib installation model of a long-span tied arch bridge includes:

[0010] Setting a plurality of monitoring points in the main arch rib installation area of the long-span tied arch bridge; wherein, the monitoring points are used to monitor the installation data of the main arch rib of the long-span tied arch bridge during the installation process;

[0011] Scan the monitoring points based on structured light scanning technology to generate first scan data;

[0012] Scan the monitoring points based on TOF scanning technology to generate second scan data;

[0013] Perform data fusion on the first scan data and the second scan data based on the F-I CP algorithm to generate a construction data set;

[0014] Establish a main arch rib installation model of a long-span tied-arch bridge based on the construction data set.

[0015] According to some embodiments of the present invention, scanning the monitoring points based on structured light scanning technology to generate first scan data includes:

[0016] Project light of a specific pattern onto the monitoring points based on the laser included in the structured light scanning device; the specific pattern includes at least one of stripes, grids, and dot matrices;

[0017] Capture an image of the light pattern reflected by the monitored points based on the first camera included in the structured light scanning device;

[0018] Analyze the light pattern image based on an image processing algorithm to determine the deformation information of the light pattern;

[0019] Compare the deformation information with the light of the specific pattern to determine the three-dimensional coordinates of the surface of the monitoring points and obtain the first scan data.

[0020] According to some embodiments of the present invention, scanning the monitoring points based on TOF scanning technology to generate second scan data includes:

[0021] Emit short-pulse near-infrared light to the monitoring points based on the near-infrared laser included in the TOF device;

[0022] Receive the light pulse signal reflected from the monitoring points based on the photodetector included in the TOF device;

[0023] Process the received light pulse signal using a time measurement circuit to calculate the distance value at the corresponding position of each pixel;

[0024] Combine the calculated distance values with the pixel positions of the second camera included in the TOF device to generate three-dimensional point cloud data of the monitoring points and generate the second scan data.

[0025] According to some embodiments of the present invention, performing data fusion on the first scan data and the second scan data based on the F-I CP algorithm to generate a construction data set includes:

[0026] Coarsely align the first scan data and the second scan data based on a feature point matching method;

[0027] Based on the F-I CP algorithm, find the closest point pairs between two sets of scanned data after rough alignment, calculate the rigid body transformation that minimizes the error between these point pairs, perform data fusion, and generate a construction data set.

[0028] According to some embodiments of the present invention, the preset installation method includes:

[0029] The main arch rib is assembled by multiple segments of arch ribs. The sling of the cable crane is used to hoist and transport each segment of the arch rib, and welding treatment is carried out after hoisting to complete the installation of the first segment of the arch rib;

[0030] At the buckle point of the main arch rib, a cantilever anchor beam is set to make the buckle cable spacing greater than the width of the arch rib section. The cable crane and the cantilever anchor beam are used to hoist and transport the remaining segments of the arch rib, complete the installation of the remaining segments of the arch rib, and install cross braces between the arch ribs.

[0031] According to some embodiments of the present invention, the welding treatment after hoisting includes:

[0032] According to the welding position of the first segment of the arch rib, a plane coordinate system is constructed, and the motion waveform of the welding laser is constructed in the plane coordinate system;

[0033]

[0034] where Y i is the corresponding ordinate value when the abscissa takes the value of X i X i is the independent variable of the motion waveform, that is, the value of the abscissa, and its value is all the values corresponding to the welding position of the first segment of the arch rib on the horizontal axis; K is the stirring frequency of the laser emitted by the welding laser; v is the welding speed of the first segment of the arch rib; x0 is the abscissa value of the initial welding position; y0 is the ordinate value of the initial welding position; s is the stirring amplitude of the laser emitted by the welding laser; θ is the welding phase angle;

[0035] Perform welding treatment based on the motion waveform of the welding laser.

[0036] According to some embodiments of the present invention, the method for obtaining the linear and stability analysis model includes:

[0037] Based on the hoisting simulation technology, simulate the hoisting of the segment arch rib under different wind speed environments to obtain the first analysis data;

[0038] Through the welding simulation technology, simulate the welding of the segment arch rib under different sunshine environments to obtain the second analysis data;

[0039] Through the welding process simulation technology, simulate the welding of the segmental arch rib under different welding sequences to obtain the third analysis data;

[0040] Obtain the alignment and stability analysis model based on the first analysis data, the second analysis data, and the third analysis data.

[0041] According to some embodiments of the present invention, before installing the main arch rib according to the main arch rib installation model and the preset installation method, it further includes: determining the target installation temperature of the main arch rib of the long-span tied arch bridge.

[0042] According to some embodiments of the present invention, determining the target installation temperature of the main arch rib of the long-span tied arch bridge includes:

[0043] Simulate at different installation temperatures, obtain the cable force information at n different installation temperatures, form the cable force vector C, and determine the temperature adjustment coefficient according to the cable force vector C;

[0044]

[0045] wherein, F(C) is the temperature adjustment coefficient; C i is the i-th value of the cable force vector C; sum(C) is the sum of the cable force vector C; F is the preset standard cable force; ∞ is infinity; is the integral of an expression containing x;

[0046] Determine the target installation temperature of the main arch rib of the long-span tied arch bridge according to the temperature adjustment coefficient;

[0047]

[0048] wherein, T is the target installation temperature; T1 is the temperature corresponding to the maximum value in the cable force vector C; T2 is the temperature corresponding to the minimum value in the cable force vector C.

[0049] The present invention proposes an interactive control method for the installation alignment of the main arch rib of a long-span tied arch bridge. Install the main arch rib based on the main arch rib installation model and the preset installation method, input the installation data into the alignment and stability analysis model, and output the alignment and stability analysis results, avoiding installation instability and quality problems, and improving the safety of construction.

[0050] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by practicing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the written specification and the drawings.

[0051] The technical solutions of the present invention will be further described in detail below through the drawings and embodiments. Brief Description of the Drawings

[0052] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0053] Figure 1 is a flowchart of an interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to an embodiment of the present invention;

[0054] Figure 2 is a flowchart of establishing an installation model of the main arch rib of a long-span tied-arch bridge according to an embodiment of the present invention;

[0055] Figure 3 is a flowchart of generating first scan data according to an embodiment of the present invention. Specific Embodiments

[0056] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for explaining and illustrating the present invention, and are not used to limit the present invention.

[0057] As Figure 1 shown, an embodiment of the present invention proposes an interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge, including steps S1 - S4:

[0058] S1. Establish an installation model of the main arch rib of a long-span tied-arch bridge;

[0059] S2. Install the main arch rib according to the main arch rib installation model and the preset installation method;

[0060] S3. During the installation process, obtain the installation data, input the installation data into the alignment and stability analysis model, and output the alignment and stability analysis results;

[0061] S4. Adjust the main arch rib installation strategy according to the alignment and stability analysis results.

[0062] Working principle of the above technical solution: Establish a main arch rib installation model for a long-span tied arch bridge, and install the main arch rib according to the main arch rib installation model and the preset installation method; during the installation process, various key data are obtained in real time, such as the position, deformation, stress, etc. of the arch rib. These data are obtained through means such as sensors and measuring equipment. The obtained data will be input into the alignment and stability analysis model, which can evaluate the alignment (i.e., shape and position) and stability (i.e., the ability to resist instability) of the arch rib. By analyzing these data, the alignment and stability analysis results of the current state of the arch rib can be obtained. Adjust the installation strategy according to the alignment and stability analysis results. If it is found that the alignment or stability of the arch rib does not meet the expectations, measures need to be taken in a timely manner for adjustment. This includes adjusting the position of the arch rib, strengthening the structure, changing the installation method, etc. The adjusted strategy needs to be verified by the model again to ensure its feasibility and safety. This process is a dynamic and interactive control process.

[0063] Beneficial effects of the above technical solution: By combining model prediction, real-time monitoring, and strategy adjustment, precise control of the installation alignment of the main arch rib of a long-span tied arch bridge can be achieved. This not only improves the accuracy and efficiency of installation but also ensures the safety and stability of the bridge structure.

[0064] As Figure 2 shown, according to some embodiments of the present invention, establishing a main arch rib installation model for a long-span tied arch bridge includes steps S11 - S15:

[0065] S11. Set a number of monitoring points in the installation area of the main arch rib of the long-span tied arch bridge; wherein, the monitoring points are used to monitor the installation data of the main arch rib of the long-span tied arch bridge during the installation process;

[0066] S12. Scan the monitoring points based on the structured light scanning technology to generate the first scan data;

[0067] S13. Scan the monitoring points based on the TOF scanning technology to generate the second scan data;

[0068] S14. Based on the F-ICP algorithm, fuse the first scan data and the second scan data to generate a construction data set;

[0069] S15. Based on the construction data set, establish a main arch rib installation model for a long-span tied arch bridge.

[0070] Working principle of the above technical solution: Monitoring points are reasonably arranged in the installation area of the main arch rib. These monitoring points should be able to comprehensively reflect key information such as the deformation and displacement of the main arch rib during the installation process. The number and position of the monitoring points are determined according to the scale, structural characteristics and installation requirements of the bridge to ensure the comprehensiveness and accuracy of the data. Structured light scanning technology is a non-contact three-dimensional measurement technology that generates a three-dimensional model of an object by projecting structured light onto the object's surface and capturing the reflected light. In this step, the structured light scanning technology is used to scan the monitoring points to obtain the three-dimensional coordinates and shape information of the monitoring points, generating the first scan data. TOF scanning technology is a three-dimensional scanning technology based on the measurement of the flight time of light pulses. It emits a beam of light pulses onto the object's surface and measures the time difference between the emission and reception of the light pulses to calculate the distance between the object and the scanner. In this step, the TOF scanning technology is used to scan the monitoring points to obtain the depth information of the monitoring points, generating the second scan data. These data complement each other with the first scan data, improving the accuracy and integrity of the model. The F-ICP algorithm is an algorithm for three-dimensional point cloud data registration and fusion. It iteratively finds the nearest point pairs between two sets of point clouds and calculates the transformation matrix to align the two sets of point clouds. In this step, the F-ICP algorithm is used to fuse the first scan data with the second scan data to generate a construction data set containing richer information. This data set provides reliable data support for the subsequent establishment of the main arch rib installation model. The construction data set is used to establish the main arch rib installation model of the long-span tied arch bridge. This model is a three-dimensional, dynamic and interactive model that can simulate key information such as the installation process, deformation and stability of the main arch rib.

[0071] Beneficial effects of the above technical solution: Ensure the accuracy and reliability of the established main arch rib installation model of the long-span tied arch bridge, and further ensure the safety and stability of the bridge structure.

[0072] As Figure 3 shown, according to some embodiments of the present invention, based on the structured light scanning technology to scan the monitoring points and generate the first scan data, including steps S121-S124:

[0073] S121. Project light of a specific pattern onto the monitoring points based on the laser included in the structured light scanning device; the specific pattern includes at least one of stripes, grids, and dot matrices;

[0074] S122. Capture the light pattern image reflected by the monitored points based on the first camera included in the structured light scanning device;

[0075] S123. Analyze the light pattern image based on the image processing algorithm to determine the deformation information of the light pattern;

[0076] S124. Compare the deformation information with light of a specific pattern to determine the three-dimensional coordinates of the surface of the monitoring point and obtain the first scan data.

[0077] Working principle of the above technical solution: The laser in the structured light scanning device is used to project a specific pattern of light onto the monitoring point. This specific pattern can be at least one of stripes, grids, or dot matrices. The selection of these patterns depends on the requirements for scanning accuracy, speed, and resolution. Striped patterns are usually used for fast scanning, while grid and dot matrix patterns may provide more detailed three-dimensional information. When the light of a specific pattern is projected onto the monitoring point, the light pattern is deformed due to the surface shape of the monitoring point. This deformed light pattern is then captured by the first camera in the structured light scanning device. What the camera captures is the image of the reflected light pattern, and this image contains the shape information of the surface of the monitoring point. Use image processing algorithms to analyze the captured light pattern image. The task of the algorithm is to identify the deformation of the light pattern, which is caused by the unevenness or shape change of the surface of the monitoring point. By analyzing the deformation information, the three-dimensional shape of the surface of the monitoring point can be inferred. Compare the deformation information with the originally projected specific pattern of light. Since the structured light scanning technology is based on a known light pattern, the three-dimensional coordinates of the surface of the monitoring point can be calculated by comparing the light patterns before and after deformation. These three-dimensional coordinates constitute the first scan data, which reflect the position of the monitoring point in three-dimensional space.

[0078] Beneficial effects of the above technical solution: It combines multiple links such as laser projection, image capture, image processing, and three-dimensional coordinate calculation, ensuring the accuracy and reliability of the scan data. These first scan data provide an important basis for subsequent data fusion and model establishment.

[0079] According to some embodiments of the present invention, scan the monitoring point based on TOF scanning technology to generate second scan data, including:

[0080] Based on the near-infrared laser included in the TOF device, emit short pulses of near-infrared light to the monitoring point;

[0081] Based on the photodetector included in the TOF device, receive the light pulse signal reflected from the monitoring point;

[0082] Use the time measurement circuit to process the received light pulse signal and calculate the distance value at the corresponding position of each pixel;

[0083] Combine the calculated distance values with the pixel positions of the second camera included in the TOF device to generate three-dimensional point cloud data of the monitoring point and generate second scan data.

[0084] Working principle of the above technical solution: The core of TOF scanning technology lies in using a near-infrared laser to emit short pulses of light. The duration of these light pulses is very short, usually at the nanosecond level. When these light pulses are emitted to the monitoring point, they will be reflected back and received by the TOF device. Since the speed of light in air is known, the distance between the monitoring point and the TOF device can be calculated by measuring the round-trip time of the light pulse. The reflected light pulse signal is received by a photodetector in the TOF device. A photodetector is a device that can convert a light signal into an electrical signal. When receiving a light pulse, the photodetector will generate a corresponding electrical signal. This electrical signal is then transmitted to the time measurement circuit for processing. The time measurement circuit is one of the core components of the TOF device. Its task is to measure the time difference between the emission and reception of the light pulse and calculate the distance between the monitoring point and the TOF device based on this time difference. Since the TOF device contains a two-dimensional photodetector array (i.e., a camera), the distance values corresponding to each pixel position can be calculated. These distance values together constitute the three-dimensional information of the monitoring point. Combine the calculated distance values with the pixel positions of the second camera. Since each pixel has a known position coordinate, the distance value can be combined with this position coordinate to generate a three-dimensional point cloud data. This three-dimensional point cloud data contains the three-dimensional coordinate information of the monitoring point, that is, the second scan data.

[0085] Beneficial effects of the above technical solution: It combines multiple links such as near-infrared light emission, light pulse reception, time measurement, and three-dimensional point cloud data generation, ensuring the accuracy and reliability of the scan data.

[0086] According to some embodiments of the present invention, based on the F-I CP algorithm, the first scan data and the second scan data are fused to generate a construction data set, including:

[0087] Coarsely align the first scan data and the second scan data based on the feature point matching method;

[0088] Based on the F-ICP algorithm, find the nearest point pairs between the two sets of scan data after coarse alignment, calculate the rigid body transformation that minimizes the error between these point pairs, perform data fusion, and generate a construction data set.

[0089] Working principle of the above technical solution: At the beginning stage of data fusion, the feature point matching method (such as SIFT, SURF, ORB, etc.) is first used to roughly align the first scan data and the second scan data. The purpose of this step is to quickly reduce the initial position difference between the two sets of data and provide a better starting point for subsequent fine alignment. The feature point matching method detects key points (i.e., regions with significant features) in the image, calculates the descriptors of these key points, and then finds the point pairs with the most similar descriptors between the two sets of data to establish a preliminary correspondence. Based on these correspondences, a preliminary rigid body transformation (including rotation and translation) can be calculated to achieve the rough alignment of the two sets of data. After rough alignment, the F-ICP algorithm is used for fine alignment. The F-ICP algorithm is an improved ICP algorithm. It quickly iteratively finds the nearest point pairs between the two sets of scan data and calculates the rigid body transformation (including rotation matrix and translation vector) that minimizes the error (usually the Euclidean distance) between these point pairs. In each iteration, the F-ICP algorithm calculates the point pair error between the two sets of data according to the current transformation parameters to update the transformation parameters to reduce the error. This process will be iteratively carried out until a predetermined number of iterations is reached or the error is less than a certain threshold. After fine alignment, the position difference between the two sets of scan data has been greatly reduced. At this time, they can be fused together to generate a construction data set containing richer information. This data set is a three-dimensional point cloud, which contains all the points of the two sets of data, and these points have been aligned to the same coordinate system through rigid body transformation.

[0090] Beneficial effects of the above technical solution: It can effectively fuse the first scan data and the second scan data to generate a construction data set containing richer information. This process involves multiple steps such as rough alignment, fine alignment, and data fusion, ensuring the accuracy and reliability of data fusion.

[0091] According to some embodiments of the present invention, the preset installation method includes:

[0092] The main arch rib is assembled by multiple segments of arch ribs. The sling of the cable crane is used to hoist and transport each segment of the arch rib, and welding treatment is carried out after hoisting to complete the installation of the first segment of the arch rib;

[0093] At the buckle point of the main arch rib, a cantilever anchor beam is set to make the buckle cable spacing greater than the width of the arch rib section. The cable crane and the cantilever anchor beam are used to hoist and transport the remaining segments of the arch rib to complete the installation of the remaining segments of the arch rib, and the cross bracing is installed between the arch ribs.

[0094] Working principle of the above technical solution: The main arch rib is assembled from multiple segments. The sling of the cable crane is used to hoist and transport each segment of the arch rib, and welding treatment is carried out after hoisting to ensure the firm connection between segments. The installation of the first segment of the arch rib is completed. This is the starting point of the entire installation process and lays the foundation for the installation of subsequent segments. A cantilever anchor beam is set at the buckle point of the main arch rib. The cantilever anchor beam is a structure used to support and fix the buckle cable, which ensures the stability and safety of the buckle cable. The distance between the buckle cables is made greater than the width of the arch rib cross-section. This is to ensure that the buckle cables can firmly fix the arch rib while avoiding unnecessary pressure or damage to the arch rib. The cable crane and the cantilever anchor beam are used to hoist and transport the remaining segments of the arch rib. This process is similar to the hoisting process of the first segment, but the cantilever anchor beam is used to provide additional support. The installation of the remaining segments of the arch rib is completed. As each segment is installed, the main arch rib gradually takes on its complete form. The cross bracing is installed between the arch ribs. The cross bracing is a component used to enhance the structural stability. It connects adjacent arch ribs and improves the stiffness and stability of the entire structure.

[0095] Beneficial effects of the above technical solution: This preset installation method involves multiple key steps, including the assembly and hoisting of segmental arch ribs, the setting of cantilever anchor beams and the hoisting of the remaining segments, as well as the installation of cross bracings, to ensure the stability and accuracy of the structure.

[0096] According to some embodiments of the present invention, the welding treatment after hoisting includes:

[0097] Based on the welding position of the first segment of the arch rib, a plane coordinate system is constructed, and the motion waveform of the welding laser is constructed in the plane coordinate system;

[0098]

[0099] where Y i is the value of the ordinate corresponding to the abscissa value X i , X i is the independent variable of the motion waveform, that is, the value of the abscissa, and its value is all the values corresponding to the welding position of the first segment of the arch rib on the horizontal axis; K is the stirring frequency of the laser emitted by the welding laser; v is the welding speed of the first segment of the arch rib; x0 is the value of the abscissa of the initial welding position; y0 is the value of the ordinate of the initial welding position; s is the stirring amplitude of the laser emitted by the welding laser; θ is the welding phase angle;

[0100] Welding treatment is carried out based on the motion waveform of the welding laser.

[0101] Working principle of the above technical solution: According to the welding position of the first-segment arch rib, a plane coordinate system is first constructed. This coordinate system is used to accurately locate the movement trajectory of the welding laser. Determine the welding parameters, including: determining the stirring frequency (K) of the laser emitted by the welding laser, the welding speed (v), the abscissa (x0) and ordinate (y0) of the initial welding position, the laser stirring amplitude (s), and the welding phase angle (θ). Calculate the movement waveform of the welding laser. This waveform describes the movement trajectory of the laser in the plane coordinate system. When welding is performed based on the movement waveform of the welding laser, according to the calculated movement waveform, configure the parameters of the welding laser, including laser power, stirring frequency, moving speed, etc. Start the welding laser, make it move according to the preset movement waveform, and perform welding treatment on the first-segment arch rib. During the welding process, the laser beam emitted by the laser will accurately scan the welding position according to the waveform, achieving high-quality welding.

[0102] Beneficial effects of the above technical solution: The automated welding technology based on the movement waveform of the welding laser can greatly improve the welding accuracy and efficiency, providing a strong guarantee for the stability and safety of the entire structure.

[0103] According to some embodiments of the present invention, a method for obtaining a linear shape and stability analysis model includes:

[0104] Based on the hoisting simulation technology, simulate the hoisting of the segment arch rib under different wind speed environments to obtain the first analysis data;

[0105] Through the welding simulation technology, simulate the welding of the segment arch rib under different sunlight environments to obtain the second analysis data;

[0106] Through the welding process simulation technology, simulate the welding of the segment arch rib under different welding sequences to obtain the third analysis data;

[0107] Obtain the linear shape and stability analysis model according to the first analysis data, the second analysis data, and the third analysis data.

[0108] Working principle of the above technical solution: Based on the hoisting simulation technology, simulate the hoisting process of the segment arch rib under different wind speed environments to evaluate the dynamic response and stability during the hoisting process. Set different wind speed environments, including conditions such as calm wind, gentle breeze, strong wind, etc. Use hoisting simulation software, input key information such as the geometric parameters, material properties, and hoisting method of the segment arch rib. Run the simulation, observe and record parameters such as the displacement, deformation, and stress of the segment arch rib during the hoisting process. Obtain the first analysis data, including the dynamic response during the hoisting process, the stability evaluation results, etc.

[0109] Through the welding simulation technology, simulate the welding process of the segmental arch rib under different sunshine environments to evaluate the temperature distribution, deformation condition and influence on the alignment during the welding process. Set different sunshine environments, including sunny days, cloudy days, morning and evening temperature differences and other conditions. Use welding simulation software and input key information such as the welding parameters of the segmental arch rib, material thermal properties, welding heat source model, etc. Run the simulation and observe and record parameters such as temperature distribution, deformation condition, residual stress, etc. during the welding process. Obtain the second analysis data, including results such as the temperature field, deformation field, stress field, etc. during the welding process.

[0110] Through the welding process simulation technology, simulate the welding process of the segmental arch rib under different welding sequences to evaluate the influence of the welding sequence on the alignment and stability. Set different welding sequence schemes, including strategies such as symmetric welding, asymmetric welding, segmented welding, etc. Use welding process simulation software and input key information such as the geometric model of the segmental arch rib, welding parameters, welding sequence, etc. Run the simulation and observe and record parameters such as the deformation condition and stress distribution of the segmental arch rib under different welding sequences. Obtain the third analysis data, including results such as the alignment change and stability evaluation results under different welding sequences.

[0111] Obtain the alignment and stability analysis model based on the first analysis data, the second analysis data and the third analysis data. Organize and analyze the simulation results, and extract key parameters and indicators. According to the analysis results, evaluate the alignment and stability performance of the segmental arch rib under different conditions, and obtain the alignment and stability analysis model.

[0112] The beneficial effects of the above technical solution: Make full use of the advantages of the simulation technology. By simulating the hoisting and welding processes of the segmental arch rib under different conditions, rich analysis data are obtained, which provides strong support for constructing an accurate alignment and stability analysis model.

[0113] According to some embodiments of the present invention, before installing the main arch rib according to the main arch rib installation model and the preset installation method, it further includes: determining the target installation temperature of the main arch rib of the long-span tied arch bridge.

[0114] The working principle and beneficial effects of the above technical solution: Since the steel pipe arch rib, stay cable, guy wire, cable crane, etc. are all steel structure materials, their linear expansion coefficients are large and they are particularly sensitive to temperature. With the temperature change at different times of each day, the position of the hoisted arch rib segment will also change accordingly. Therefore, in order to accurately position and facilitate construction, a target installation temperature is determined to ensure that the final position of the arch rib segment after hoisting and welding meets the design requirements.

[0115] According to some embodiments of the present invention, determining the target installation temperature of the main arch rib of the long-span tied arch bridge includes:

[0116] Simulate to obtain the cable force information at n different installation temperatures, form the cable force vector C, and determine the temperature adjustment coefficient according to the cable force vector C.

[0117]

[0118] Among them, F(C) is the temperature adjustment coefficient; C i is the i-th value of the cable force vector C; sum(C) is the sum of the cable force vector C; F is the preset standard cable force; ∞ is infinity; is the integral of an expression containing x;

[0119] Determine the target installation temperature of the main arch rib of the long-span tied-arch bridge according to the temperature adjustment coefficient.

[0120]

[0121] Among them, T is the target installation temperature; T1 is the temperature corresponding to the maximum value in the cable force vector C; T2 is the temperature corresponding to the minimum value in the cable force vector C.

[0122] The working principle of the above technical solution: Conduct simulation at different installation temperatures, and these temperatures cover the possible temperature range to ensure that the most suitable installation temperature can be found. The simulation should consider the influence of various factors such as the arch rib, rigging, wind load, temperature, etc. to obtain accurate cable force information. For each simulation temperature, record the cable force vector C, where C i is the i-th value of the cable force vector C, and determine the temperature adjustment coefficient according to the cable force vector C. The integral part in the formula represents the probability distribution function from the preset standard cable force F to infinity, which is used to evaluate the deviation degree of the cable force vector C from the standard cable force. According to the cable force vector C, determine the temperature corresponding to the maximum value in the cable force vector C and the temperature corresponding to the minimum value in the cable force vector C. T is the target installation temperature, which is the installation temperature that meets the cable force requirements and considers the temperature influence.

[0123] The beneficial effects of the above technical solution: By simulating the cable force information at different installation temperatures and using the given formula to calculate the temperature adjustment coefficient, the target installation temperature of the main arch rib of the long-span tied-arch bridge can be determined, which is convenient to improve the installation accuracy and stability.

[0124] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge, characterized in that, Including: Establish a main arch rib installation model for a long-span tied-arch bridge; Install the main arch rib according to the main arch rib installation model and the preset installation method; During the installation process, obtain installation data, input the installation data into the alignment and stability analysis model, and output the alignment and stability analysis results; Adjust the main arch rib installation strategy according to the alignment and stability analysis results.

2. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to claim 1, characterized in that, Establish a main arch rib installation model for a long-span tied-arch bridge, including: Set several monitoring points in the installation area of the main arch rib of the long-span tied-arch bridge; among them, the monitoring points are used to monitor the installation data of the main arch rib of the long-span tied-arch bridge during the installation process; Scan the monitoring points based on the structured light scanning technology to generate the first scan data; Scan the monitoring points based on the TOF scanning technology to generate the second scan data; Perform data fusion on the first scan data and the second scan data based on the F-ICP algorithm to generate a construction data set; Establish a main arch rib installation model for a long-span tied-arch bridge based on the construction data set.

3. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to claim 2, characterized in that, Scan the monitoring points based on the structured light scanning technology to generate the first scan data, including: Project light of a specific pattern from the laser included in the structured light scanning device to the monitoring points; the specific pattern includes at least one of stripes, grids, and dot matrices; Capture the light pattern image reflected by the monitored points by the first camera included in the structured light scanning device; Analyze the light pattern image based on the image processing algorithm to determine the deformation information of the light pattern; Compare the deformation information with the light of the specific pattern to determine the three-dimensional coordinates of the surface of the monitoring points and obtain the first scan data.

4. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to claim 2, wherein, Scan the monitoring points based on the TOF scanning technology to generate the second scan data, including: Emit short-pulse near-infrared light from the near-infrared laser included in the TOF device to the monitoring points; Receive the light pulse signal reflected from the monitoring points by the photodetector included in the TOF device; Process the received light pulse signal using the time measurement circuit to calculate the distance value at the corresponding position of each pixel; Combine the calculated distance value with the pixel position of the second camera included in the TOF device to generate the three-dimensional point cloud data of the monitoring points and generate the second scan data.

5. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge as claimed in claim 2, wherein, Perform data fusion on the first scan data and the second scan data based on the F-ICP algorithm to generate a construction data set, including: Coarsely align the first scan data and the second scan data based on the feature point matching method; Find the nearest point pairs between the two sets of scan data after coarse alignment based on the F-ICP algorithm, calculate the rigid body transformation that minimizes the error between these point pairs, perform data fusion, and generate a construction data set.

6. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge as claimed in claim 1, characterized in that The preset installation method includes: The main arch rib is assembled by multiple segments of arch ribs. Use the lifting tool of the cable crane to hoist and transport each segment of the arch rib, and perform welding treatment after hoisting to complete the installation of the first segment of the arch rib; Set a cantilever anchor beam at the buckle point of the main arch rib, with the buckle cable spacing greater than the width of the arch rib section. Use the cable crane and the cantilever anchor beam to hoist and transport the remaining segments of the arch rib, complete the installation of the remaining segments of the arch rib, and install cross braces between the arch ribs.

7. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to claim 6, characterized in that, Perform welding treatment after hoisting, including: Construct a plane coordinate system according to the welding position of the first - section arch rib, and construct the motion waveform of the welding laser in the plane coordinate system; Among them, Y i is the value of the ordinate corresponding to when the abscissa takes the value of X i ; X i is the independent variable of the motion waveform, that is, the value of the abscissa, and its value is all the values corresponding to the welding positions of the first-section arch rib on the horizontal axis; K is the stirring frequency of the laser emitted by the welding laser; v is the welding speed of the first-section arch rib; x0 is the value of the abscissa of the initial welding position; y0 is the value of the ordinate of the initial welding position; s is the stirring amplitude of the laser emitted by the welding laser; θ is the welding phase angle; Perform welding processing based on the motion waveform of the welding laser.

8. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge as claimed in claim 1, wherein, The method for obtaining the linear - shape and stability analysis model includes: Based on the hoisting simulation technology, simulate the hoisting of the arch rib segments under different wind - speed environments to obtain the first analysis data; Through the welding simulation technology, simulate the welding of the arch rib segments under different sunshine environments to obtain the second analysis data; Through the welding - process simulation technology, simulate the welding of the arch rib segments under different welding sequences to obtain the third analysis data; Obtain the linear - shape and stability analysis model according to the first analysis data, the second analysis data, and the third analysis data.

9. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to claim 1, characterized in that, Before installing the main arch rib according to the main - arch - rib installation model and the preset installation method, it also includes: determining the target installation temperature of the main arch rib of the long - span tied - arch bridge.

10. The interactive control method for the installation alignment of the main arch rib of a long-span tied-arch bridge according to claim 9, characterized in that, Determining the target installation temperature of the main arch rib of the long - span tied - arch bridge includes: Simulate at different installation temperatures, obtain the cable - force information at n different installation temperatures, form the cable - force vector C, and determine the temperature - adjustment coefficient according to the cable - force vector C; Among them, F(C) is the temperature adjustment coefficient; C i is the i-th value of the cable force vector C; sum(C) is the sum of the cable force vector C; F is the preset standard cable force; ∞ is infinity; is the integral of an expression containing x; Determine the target installation temperature of the main arch rib of the long - span tied - arch bridge according to the temperature - adjustment coefficient; Wherein, T is the target installation temperature; T1 is the temperature corresponding to the maximum value in the cable - force vector C; T2 is the temperature corresponding to the minimum value in the cable - force vector C.

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