Arch rib pre-assembly deviation digital control method for multi-point synchronous positioning

Abstract

The application belongs to the technical field of arch rib construction, especially a multi-point synchronous positioning arch rib pre-assembly deviation digital control method, comprising the following steps: step one, establishing a digital model: first, according to the design drawings and parameters of the arch rib, a three-dimensional digital model of the arch rib is established by using computer-aided design software. The multi-point synchronous positioning arch rib pre-assembly deviation digital control method significantly improves the accuracy and construction efficiency of arch rib pre-assembly through multi-point synchronous measurement and digital control technology. Compared with the traditional method, the application can monitor and dynamically adjust the pre-assembly deviation in real time, avoid the error accumulation in manual operation, and ensure the construction quality and structural safety; the digital control method can significantly improve the accuracy of arch rib pre-assembly, reduce errors, and ensure the stability and safety of the structure; through digital technology, the measurement, positioning and adjustment work can be automatically completed, greatly improving the construction efficiency and shortening the construction period.

Description

Technical Field

[0001] The present invention relates to the technical field of arch rib construction, and in particular to a digital control method for arch rib pre-assembly deviation with multi-point synchronous positioning. Background Art

[0002] The pre-assembly of arch ribs is a critical step in arch bridge construction. Currently, this process typically relies on manual measurement and empirical positioning, which can easily lead to cumulative errors, compromising construction quality and structural safety. Traditional methods are inefficient and lack accuracy, making them inadequate for the high-precision construction requirements of modern large-scale arch bridges. Therefore, a digital control method for the pre-assembly of arch ribs with multi-point synchronous positioning is needed. Summary of the Invention

[0003] Existing arch rib pre-assembly methods typically rely on manual measurement and empirical positioning, which can easily lead to cumulative errors, impacting construction quality and structural safety. Traditional methods are inefficient and inaccurate, making them difficult to meet the technical requirements of high-precision construction of modern large arch bridges. This paper proposes a digital control method for arch rib pre-assembly deviations using multi-point synchronous positioning.

[0004] The present invention proposes a digital control method for pre-assembly deviation of arch ribs with multi-point synchronous positioning, which includes the following steps: Step 1, establishing a digital model: First, according to the design drawings and parameters of the arch ribs, a three-dimensional digital model of the arch ribs is established using computer-aided design software.

[0005] Step 2: Divide the arch rib into pre-assembly units: Divide the entire arch rib into several pre-assembly units according to the structural characteristics of the arch rib and the production process requirements; each pre-assembly unit includes several arch rib segments and corresponding connection nodes.

[0006] Step 3. Determine the pre-assembly sequence: Determine the pre-assembly sequence of each pre-assembly unit based on the structural characteristics of the arch rib and the construction process requirements.

[0007] Step 4: Generate a pre-assembly path: Generate a pre-assembly path for each pre-assembly unit using computer-aided design software based on the pre-assembly sequence of the pre-assembly units; the pre-assembly path includes the moving direction, moving distance, and moving speed of the pre-assembly unit.

[0008] Step 5. Design pre-assembly tooling: Design pre-assembly tooling based on the pre-assembly path and the structural characteristics of the arch ribs; the pre-assembly tooling includes fixtures for fixing and adjusting the arch rib segments, brackets for supporting and stabilizing the arch ribs, and measuring equipment for measuring and adjusting the position of the arch rib segments.

[0009] Step 6: Multi-point synchronous positioning: Use pre-assembly tooling and measuring equipment to perform multi-point synchronous positioning of each pre-assembly unit.

[0010] Step 7: Digital control of deviation: Use measuring equipment to measure the position deviation of each pre-assembled unit in real time and transmit the measurement data to the computer control system; the computer control system makes real-time adjustments to each pre-assembled unit based on the measurement data and control algorithm to achieve digital control of the deviation.

[0011] Step 8. Pre-assembly quality inspection: During the pre-assembly process, the pre-assembly quality of the arch ribs shall be inspected regularly; the inspection content shall include the geometric shape, size and joint gap of the arch ribs; when quality problems are found, timely adjustments and processing shall be carried out.

[0012] Step 9. Pre-assembly completion: When all pre-assembly units are pre-assembled according to the pre-assembly sequence and requirements, the pre-assembly work of the entire arch rib is completed.

[0013] Preferably, in step 5, the coordinates of the measuring point are calculated as follows: Let the measuring point P i The actual coordinate is X i ,Y i ,Z i , the theoretical design coordinate is X i0 ,Y i0 ,Z i0 , then the offset ΔP i :

[0014] ΔX i =X i -X i0 ;

[0015] ΔY i =Y i -Y i0 ;

[0016] ΔZ i =Z i -Z i0 .

[0017] Preferably, in step seven, the overall offset of the arch rib is calculated as follows: assuming that the overall offset of the arch rib ΔP is the weighted average of the offsets of each measuring point, then:

[0018] Among them, w i is the weight of the i-th measurement point.

[0019] Preferably, the real-time adjustment amount calculation in step seven is: during the adjustment process, the coordinate change of the measurement point monitored in real time δP i :

[0020] δP i =P i new -P i current , where Pi new P is the coordinate of the new measurement point after adjustment. i current The coordinates of the current measurement point.

[0021] Preferably, the model in step 1 includes the geometric shape, size and material properties of the arch ribs, collects information about the pre-assembly site, the site plan, topography and existing facilities, adds three-dimensional models of lifting equipment and transport vehicles to the model, and integrates model elements such as the site, arch ribs, lifting equipment and transport vehicles to form a complete pre-assembly environment model.

[0022] Preferably, in step 2, the structural form, span, height and curvature parameters of the arch rib are analyzed to determine the segmentation point; and the size of the pre-assembled unit is determined according to the conditions of the prefabrication site, lifting capacity, storage space and processing equipment.

[0023] Preferably, in step four, the software is used to define relevant attributes for each pre-assembly unit, including weight, size and center of gravity position; the simulation function of the software is used to perform virtual operations on the pre-assembly process, check the path planning, and generate movement and lifting instructions for the pre-assembly unit based on the path planning verified by the simulation; and the planned pre-assembly path and instructions are output as an executable file.

[0024] Preferably, in step five, the measuring equipment is integrated with the computer control system to realize real-time data collection and processing, and the designed tooling and measuring system are tested to ensure the requirements of the pre-assembly process. The measuring equipment forms a measurement network covering the entire pre-assembly area by arranging multiple high-precision total stations and laser rangefinders; the spatial coordinate data of each measuring point is collected in real time by using the measuring equipment to generate a three-dimensional model of the pre-assembly area.

[0025] Preferably, in step six, pre-assembly tooling and measuring equipment are used to place the first pre-assembly unit at a predetermined starting position, and subsequent pre-assembly units are positioned one by one according to the pre-assembly path and construction plan, with each unit positioned so as to precisely align with the previous unit.

[0026] Preferably, in step seven, a control algorithm is used to process the measurement data and generate adjustment instructions. The adjustment strategy should be able to automatically identify deviations and adjust the position of the pre-assembled unit in real time. The computer control system generates adjustment instructions based on the control algorithm and adjustment strategy. The adjustment instructions adjust the pre-assembled unit in real time through the actuator. The adjustment process forms a closed-loop control and the adjustment effect is fed back in real time. According to the feedback data, the control algorithm and adjustment strategy are adjusted to optimize the adjustment process.

[0027] The beneficial effects of the present invention are:

[0028] 1. A digital control method for arch rib pre-assembly deviation with multi-point synchronous positioning significantly improves the accuracy and construction efficiency of arch rib pre-assembly through multi-point synchronous measurement and digital control technology. Compared with traditional methods, this invention can monitor and dynamically adjust pre-assembly deviation in real time, avoiding the accumulation of errors in manual operation and ensuring construction quality and structural safety. The digital control method can significantly improve the accuracy of arch rib pre-assembly, reduce errors, and ensure the stability and safety of the structure. Through digital technology, measurement, positioning, and adjustment work can be completed automatically, greatly improving construction efficiency and shortening the construction period. Digital control can reduce labor costs and material waste, and achieve optimal resource allocation through precise data analysis and control.

[0029] 2. Accurate pre-assembly can reduce safety risks during the construction process, ensuring project quality and personnel safety; the digital control system can monitor the status of each key point in real time. Once deviations are found, adjustments can be made quickly to ensure that the project is carried out according to design requirements; errors and rework during the construction process are reduced, reducing energy consumption and material waste; digital control can record various data during the construction process in detail, facilitating subsequent analysis and summary, and providing reference for future projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural flow chart of a digital control method for pre-assembly offset of arch ribs with multi-point synchronous positioning. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Reference Figure 1 A digital control method for pre-assembly deviation of arch ribs with multi-point synchronous positioning includes the following steps: Step 1, establishing a digital model: First, according to the design drawings and parameters of the arch ribs, a three-dimensional digital model of the arch ribs is established using computer-aided design software; the model in Step 1 includes the geometric shape, size and material properties of the arch ribs, collects information about the pre-assembly site, the site plan, topography and existing facilities, adds three-dimensional models of lifting equipment and transport vehicles to the model, and integrates model elements such as the site, arch ribs, lifting equipment and transport vehicles to form a complete pre-assembly environment model.

[0033] By establishing a precise three-dimensional digital model, the geometric shape and size of the arch ribs, as well as their position in the pre-assembly site, can be intuitively displayed to ensure consistency in design and construction; by integrating elements such as lifting equipment and transport vehicles into the model, collision detection can be performed to avoid interference between equipment and the structure or environment during the actual construction process, reducing construction risks; the digital model can be used to simulate the entire pre-assembly process, including steps such as lifting, transportation and assembly. Through virtual construction rehearsals, construction plans can be optimized and errors and rework in actual operations can be reduced.

[0034] Step 2: Divide the pre-assembled units: Divide the entire arch rib into several pre-assembled units according to the structural characteristics of the arch rib and the production process requirements; each pre-assembled unit includes several arch rib segments and corresponding connection nodes; in step 2, the structural form, span, height and curvature parameters of the arch rib are analyzed to determine the division points; the size of the pre-assembled unit is determined according to the conditions of the prefabrication site, lifting capacity, storage space and processing equipment.

[0035] Step 3. Determine the pre-assembly sequence: Determine the pre-assembly sequence of each pre-assembly unit based on the structural characteristics of the arch rib and the construction process requirements.

[0036] Through in-depth analysis of the structural form, span, height and curvature parameters of the arch ribs, the rational setting of the division points can be ensured, so that the pre-assembled units can meet the structural mechanics requirements and facilitate construction; the reasonable size of the pre-assembled units can reduce the construction difficulty, make the construction process smoother, and reduce technical problems and risks in construction.

[0037] Step 4. Generate pre-assembly path: According to the pre-assembly sequence of the pre-assembly units, use computer-aided design software to generate the pre-assembly path of each pre-assembly unit; the pre-assembly path includes the moving direction, moving distance and moving speed of the pre-assembly unit; in step 4, use the software to define relevant properties for each pre-assembly unit, including weight, size and center of gravity position; use the simulation function of the software to perform virtual operations on the pre-assembly process, check the path planning, and generate the movement and lifting instructions of the pre-assembly unit based on the path planning verified by the simulation; output the planned pre-assembly path and instructions as an executable file.

[0038] The pre-assembly path generated by computer-aided design software can ensure the rationality and efficiency of the construction process and reduce unnecessary construction steps; the planning of the pre-assembly path takes into account the weight, size and center of gravity of the unit, which can ensure the safety of the lifting and moving process and reduce the risk of accidents; through software simulation of the pre-assembly process, potential problems can be discovered and resolved before actual construction, reducing on-site operational errors and rework.

[0039] Step 5. Design pre-assembly tooling: Design pre-assembly tooling based on the pre-assembly path and the structural characteristics of the arch ribs; the pre-assembly tooling includes fixtures for fixing and adjusting the arch rib segments, brackets for supporting and stabilizing the arch ribs, and measuring equipment for measuring and adjusting the position of the arch rib segments; in step 5, the measuring equipment is integrated with the computer control system to realize real-time data collection and processing, and the designed tooling and measuring system are tested to ensure the requirements of the pre-assembly process. The measuring equipment forms a measurement network covering the entire pre-assembly area by arranging multiple high-precision total stations and laser rangefinders; the measuring equipment is used to collect the spatial coordinate data of each measuring point in real time to generate a three-dimensional model of the pre-assembly area.

[0040] By designing special pre-assembly tooling, the precise positioning and adjustment of the arch rib segments during the pre-assembly process can be ensured, thereby improving the assembly accuracy of the overall structure; the integrated measuring equipment and computer control system can realize real-time data collection and processing, with a high degree of automation, reducing the errors and labor intensity of manual measurement; by arranging multiple high-precision total stations and laser rangefinders, a measurement network covering the entire pre-assembly area is formed, which can monitor the position of the arch rib segments in real time and quickly detect and adjust deviations; the spatial coordinate data collected in real time can be quickly fed back to the computer control system to quickly generate a three-dimensional model of the pre-assembly area, improving construction efficiency and decision-making speed.

[0041] Calculation of measuring point coordinates in step 5: Let measuring point P i The actual coordinates are (X i ,Y i ,Z i ), the theoretical design coordinate is (X i0 ,Y i0 ,Z i0 ), then the offset ΔP i :

[0042] ΔX i =X i -X i0 ;

[0043] ΔY i =Y i -Y i0 ;

[0044] ΔZ i =Z i -Z i0 .

[0045] Step 6. Multi-point synchronous positioning: Use pre-assembly tooling and measuring equipment to perform multi-point synchronous positioning of each pre-assembly unit; In step 6, use pre-assembly tooling and measuring equipment to place the first pre-assembly unit at the predetermined starting position, and position subsequent pre-assembly units one by one according to the pre-assembly path and construction plan. The positioning of each unit should be precisely aligned with the previous unit.

[0046] Multi-point synchronous positioning allows the construction team to simultaneously position multiple pre-assembled units, greatly improving construction efficiency and shortening the construction period; multi-point synchronous positioning reduces the adjustment work caused by inaccurate unit positioning, reduces the risks of high-altitude operations and the use of large equipment, and improves construction safety.

[0047] Step 7: Digital control of deviation: Use measuring equipment to measure the position deviation of each pre-assembled unit in real time and transmit the measured data to the computer control system; the computer control system makes real-time adjustments to each pre-assembled unit based on the measured data and control algorithm to achieve digital control of the deviation;

[0048] Calculation of the overall offset of the arch rib in step 7: Assume that the overall offset of the arch rib ΔP is the weighted average of the offsets of each measuring point, then:

[0049] Among them, w i is the weight of the i-th measurement point;

[0050] Calculation of real-time adjustment in step 7: During the adjustment process, the coordinate change of the measuring point monitored in real time is δP i :

[0051] δP i =P i new -P i current , where P i new P is the coordinate of the new measurement point after adjustment. i current The coordinates of the current measurement point.

[0052] In step seven, a control algorithm is used to process the measurement data and generate adjustment instructions. The adjustment strategy should be able to automatically identify deviations and adjust the position of the pre-assembled unit in real time. The computer control system generates adjustment instructions based on the control algorithm and adjustment strategy. The adjustment instructions are used to adjust the pre-assembled unit in real time through the actuator. The adjustment process forms a closed-loop control and the adjustment effect is fed back in real time. According to the feedback data, the control algorithm and adjustment strategy are adjusted to optimize the adjustment process.

[0053] Step 8. Pre-assembly quality inspection: During the pre-assembly process, the pre-assembly quality of the arch ribs shall be inspected regularly; the inspection content shall include the geometric shape, size and joint gap of the arch ribs; when quality problems are found, timely adjustments and processing shall be carried out.

[0054] Step 9. Pre-assembly completion: When all pre-assembly units are pre-assembled according to the pre-assembly sequence and requirements, the pre-assembly work of the entire arch rib is completed.

[0055] This digital control method for arch rib pre-assembly offset with multi-point synchronous positioning significantly improves the accuracy and construction efficiency of arch rib pre-assembly through multi-point synchronous measurement and digital control technology. Compared with traditional methods, this method can monitor and dynamically adjust pre-assembly offset in real time, avoiding the accumulation of errors in manual operation and ensuring construction quality and structural safety. The digital control method can significantly improve the accuracy of arch rib pre-assembly, reduce errors, and ensure the stability and safety of the structure. Through digital technology, measurement, positioning, and adjustment tasks can be completed automatically, greatly improving construction efficiency and shortening the construction period. Digital control can reduce labor costs and material waste, and achieve optimal resource allocation through precise data analysis and control.

[0056] Precise pre-assembly can reduce safety risks during construction, ensuring project quality and personnel safety; the digital control system can monitor the status of each key point in real time, and once deviations are found, adjustments can be made quickly to ensure that the project is carried out according to design requirements; errors and rework during construction are reduced, reducing energy consumption and material waste; digital control can record various data during the construction process in detail, facilitating subsequent analysis and summary, and providing a reference for future projects.

[0057] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A digital control method for pre-assembly deviation of arch ribs with multi-point synchronous positioning, characterized by: The method comprises the following steps: Step 1, establishing a digital model: First, according to the design drawings and parameters of the arch rib, a three-dimensional digital model of the arch rib is established using computer-aided design software; the model in Step 1 includes the geometric shape, size and material properties of the arch rib, collects information about the pre-assembly site, the site plan, topography and existing facilities, adds three-dimensional models of lifting equipment and transport vehicles to the model, and integrates the site, arch rib, lifting equipment and transport vehicle model elements together to form a complete pre-assembly environment model; Step 2: Divide the pre-assembly units: Divide the entire arch rib into several pre-assembly units according to the structural characteristics of the arch rib and the production process requirements; each pre-assembly unit includes several arch rib segments and corresponding connection nodes; in step 2, the structural form, span, height and curvature parameters of the arch rib are analyzed to determine the division points; the size of the pre-assembly unit is determined according to the conditions of the prefabrication site, lifting capacity, storage space and processing equipment; Step 3: Determine the pre-assembly sequence: Determine the pre-assembly sequence of each pre-assembly unit based on the structural characteristics of the arch rib and the construction process requirements; Step 4: Generate a pre-assembly path: Generate a pre-assembly path for each pre-assembly unit using computer-aided design software based on the pre-assembly sequence of the pre-assembly units; the pre-assembly path includes the moving direction, moving distance, and moving speed of the pre-assembly unit; in step 4, define relevant attributes for each pre-assembly unit in the software, including weight, size, and center of gravity; utilize the simulation function of the software to perform a virtual operation on the pre-assembly process, check the path planning, and generate movement and lifting instructions for the pre-assembly unit based on the path planning verified by the simulation; output the planned pre-assembly path and instructions as an executable file; Step 5. Design pre-assembly tooling: Design pre-assembly tooling according to the pre-assembly path and the structural characteristics of the arch rib; the pre-assembly tooling includes a fixture for fixing and adjusting the arch rib segment, a bracket for supporting and stabilizing the arch rib, and a measuring device for measuring and adjusting the position of the arch rib segment; Calculate the coordinates of the measuring points in step 5: Set the measuring point The actual coordinates are ( ), the theoretical design coordinates are ( ), then the offset : ； ； ； In step five, the measuring equipment is integrated with the computer control system to realize real-time data collection and processing, and the designed tooling and measuring system are tested to ensure the requirements of the pre-assembly process. The measuring equipment forms a measurement network covering the entire pre-assembly area by arranging multiple high-precision total stations and laser rangefinders; the spatial coordinate data of each measuring point is collected in real time by the measuring equipment to generate a three-dimensional model of the pre-assembly area; Step 6: Multi-point synchronous positioning: Use pre-assembly tooling and measuring equipment to perform multi-point synchronous positioning on each pre-assembly unit. In step 6, use pre-assembly tooling and measuring equipment to place the first pre-assembly unit at a predetermined starting position. According to the pre-assembly path and construction plan, position the subsequent pre-assembly units one by one. The positioning of each unit should be precisely aligned with the previous unit. Step 7, digital control of offset: Use measuring equipment to measure the position deviation of each pre-assembled unit in real time, and transmit the measured data to the computer control system; the computer control system adjusts each pre-assembled unit in real time according to the measured data and control algorithm to achieve digital control of the offset; Calculation of the overall offset of the arch rib in step 7: Assume that the overall offset of the arch rib is is the weighted average of the offsets of each measuring point, then: ;in, is the weight of the i-th measurement point; The real-time adjustment amount calculation in step 7: During the adjustment process, the coordinate changes of the measurement points monitored in real time : ,in, is the coordinate of the new measurement point after adjustment, is the coordinate of the current measurement point; In step seven, a control algorithm is used to process the measurement data and generate adjustment instructions. The adjustment strategy should be able to automatically identify deviations and adjust the position of the pre-assembled unit in real time. The computer control system generates adjustment instructions based on the control algorithm and adjustment strategy. The adjustment instructions are used to adjust the pre-assembled unit in real time through the actuator. The adjustment process forms a closed-loop control and real-time feedback of the adjustment effect. According to the feedback data, the control algorithm and adjustment strategy are adjusted to optimize the adjustment process. Step 8. Pre-assembly quality inspection: During the pre-assembly process, the pre-assembly quality of the arch ribs shall be inspected regularly. The inspection contents shall include the geometric shape, size and joint clearance of the arch ribs. If any quality problems are found, they shall be adjusted and handled in a timely manner. Step 9. Pre-assembly completion: When all pre-assembly units are pre-assembled according to the pre-assembly sequence and requirements, the pre-assembly work of the entire arch rib is completed.

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