Installation method of spatial special-shaped arch rib structure of large-span basket steel box arch bridge

Abstract

The invention relates to the technical field of bridge construction, in particular to a method for mounting a spatial special-shaped arch rib structure of a large-span basket steel box arch bridge, which is used for carrying out early-stage preparation and optimization of mounting of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge, segment manufacturing of the spatial special-shaped arch rib structure and precise transportation of arch rib segments. According to the method, arch rib sections are hoisted and butted, the linear shape of the spatial special-shaped arch rib is adjusted and fixed, an intelligent monitoring scheme is achieved in the subsequent construction process, environment protection and planning are carried out, resources are saved, and a project is checked and accepted after construction is completed. The defects of a traditional arch rib structure installation method are overcome, the construction precision, efficiency, safety and environmental friendliness are improved, and a more scientific, efficient and sustainable solution is provided for construction of modern bridge engineering.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to an installation method for a spatial special-shaped arch rib structure of a large-span basket-handled steel box arch bridge. Background Art

[0002] With the rapid increase of population in my country, more large-span bridges are urgently needed to relieve the growing traffic pressure. Steel box arch bridges have been increasingly favored by bridge builders due to their good mechanical properties and spatial artistic sense. To ensure the quality of bridge completion, the key is to reasonably control the construction quality. Therefore, bridge construction control is one of the most important links in the entire construction process. On the other hand, as the span of the bridge continues to increase, the lateral stiffness of the bridge continues to decrease, which in turn brings more bridge instability problems, becoming an important factor restricting the development of steel box arch bridges.

[0003] Among them, the spatial special-shaped arch rib structure of the large-span basket-handled steel box arch bridge is a bridge structure with complex geometric shapes and high precision requirements. Its arch rib structure adopts a steel box section to form a basket-style spatial special-shaped structure. This structural form is not only beautiful and unique, but also has high bearing capacity and stability. The large-span basket-handled steel box arch bridge is usually used to cross large rivers or important traffic arteries. It is one of the important types in modern bridge engineering.

[0004] At the same time, due to the complicated construction process of the large-span steel box basket arch bridge, the construction process must go through the gradual application of external loads. Therefore, it is necessary to closely monitor the bridge construction stage to obtain the linear shape and internal force state of the key cross-section of the bridge. When it is found that the results are significantly different from the finite element calculation results, the reasons should be analyzed and adjusted in time, otherwise it will cause serious engineering accidents. In addition to stress control and linear control, stability control also plays an important role in the construction control of bridges, especially as the span of the current bridge is getting larger and larger, the lateral stiffness of the bridge is constantly decreasing, which leads to more bridge instability problems. At present, there is no reliable stability control operation method to predict possible instability phenomena. At present, more bridge stability analysis and calculation are carried out, and the stability of the structure is comprehensively evaluated by calculating the safety stability coefficient and combining stress and deformation.

[0005] Therefore, in general, traditional arch rib structure installation methods often rely on manual experience and on-site adjustments, which are difficult to achieve high-precision control and adjustment, and are prone to construction errors and reduced bridge performance. Multiple adjustments and rework may be required during the construction process, resulting in extended construction periods and increased construction costs. Due to reliance on manual operations and on-site adjustments, traditional methods have major safety hazards during the construction process, are prone to safety accidents, and are prone to ignoring the importance of environmental protection and resource conservation, resulting in a large amount of waste and pollution during the construction process, as well as serious waste of materials.

[0006] In summary, it is necessary to propose an installation method for the spatial special-shaped arch rib structure of a large-span basket-handled steel box arch bridge to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide an installation method for a spatial special-shaped arch rib structure of a large-span basket steel box arch bridge, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The installation method of the spatial special-shaped arch rib structure of a large-span basket steel box arch bridge comprises the following steps:

[0010] S1. Carry out preliminary preparation and optimization for the installation of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge;

[0011] S2. Segment manufacturing of spatial special-shaped arch rib structures and precise transportation of arch rib segments;

[0012] S3. Implement the lifting and docking of arch rib segments;

[0013] S4. Adjust and fix the linear shape of the spatial special-shaped arch rib;

[0014] S5. Implement intelligent monitoring solutions during subsequent construction;

[0015] S6. Carry out environmental protection and planning to save resources;

[0016] S7. Acceptance inspection of the project shall be conducted upon completion of construction.

[0017] Preferably, the preliminary preparation and optimization of step S1 includes the following steps:

[0018] S1.1. Detailed design and precise planning: For the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge, detailed structural analysis and precise calculation are carried out to determine the complex geometric shape and size of the arch rib. The following formula should be used for optimization in combination with finite element analysis software, see formula (1):

[0019]

[0020] Where, L is the calculated span of the arch rib after considering the pre-camber, R is the radius of the arch rib, f is the sagitta of the arch rib, and ΔL is the adjustment value based on the pre-camber setting and construction requirements, which is determined through construction simulation and on-site measurement.

[0021] Formulate a detailed construction plan for the large-span steel box arch bridge, including the hoisting sequence, hoisting method, and temporary support setting, and use intelligent software for simulation analysis to ensure the feasibility and safety of the construction plan;

[0022] S1.2. Precise preparation of construction equipment and materials: Prepare hoisting equipment with hoisting capacity that meets the requirements, and perform a re-calculation of the hoisting capacity to ensure that the arch rib segments can be hoisted safely and accurately. The hoisting capacity calculation formula is shown in formula (2):

[0023] Q ≥ k × (W + W w )(2);

[0024] Where Q is the rated lifting capacity of the lifting equipment, W is the maximum weight of the arch rib segment, and W w is the additional construction load due to wind load, k is the safety factor;

[0025] Check and ensure that all construction equipment and machinery are in good condition, especially the special equipment and tools required for the construction of large-span basket-lift steel box arch bridges;

[0026] Prepare sufficient construction materials and auxiliary materials, including high-strength steel and precision connectors, to meet the high-precision requirements of the arch rib structure;

[0027] S1.3. Strengthening of on-site arrangements and safety measures.

[0028] Preferably, the step S1.3 comprises the following steps:

[0029] S1.3.1. Clean and level the construction site to ensure sufficient working space, and set up necessary construction platforms and passages to facilitate the lifting and docking of arch rib segments;

[0030] S1.3.2. Set up strict safety facilities and warning signs, especially in high-altitude operations and hoisting areas, to ensure the safety of construction workers;

[0031] S1.3.3. Provide safety education and training for construction personnel on the construction of large-span steel box arch bridges, and arrange intelligent safety monitoring systems. Install sensors to monitor the safety conditions of the construction site in real time, including stress and displacement, and provide real-time warnings through the following algorithms:

[0032] S1.3.4. The early warning algorithm process is sensor data collection, data transmission to the central processing unit, data processing and analysis, comparison with the preset threshold and issuance of early warning signals;

[0033] S1.3.5. Carry out stress warning process, if σ real >σ allow , an early warning is issued;

[0034] In the formula, σ real is the stress value monitored in real time, σ allow is the maximum allowable stress value.

[0035] Preferably, step S2 comprises the following steps:

[0036] S2.1. Precision control of segment manufacturing: In the factory, arch rib segments are manufactured according to the design drawings and precision manufacturing process requirements to ensure that the size, shape and accuracy of the segments meet the design requirements. The segment quality inspection and pre-assembly are carried out to ensure the docking accuracy and overall quality between the segments;

[0037] S2.2. Precise organization of segment transportation: Use appropriate transportation tools and formulate precise transportation plans to ensure the safety and stability of the segments during transportation. During transportation, take necessary protective measures, including the use of shock-absorbing pads and fixed brackets, to prevent the segments from being damaged or deformed.

[0038] Preferably, step S3 comprises the following steps:

[0039] S3.1. Precise erection of temporary support system: Erect a temporary support system for hoisting on the bridge pier or temporary tower, and perform stability calculation and optimization to ensure that the support system can bear the weight of the arch rib segment and the construction load;

[0040] S3.2. Precision control of segment lifting: Use a crane or cable lifting system and formulate a precise lifting plan to ensure that the segment can be accurately and smoothly lifted onto the temporary support system. During the lifting process, use an intelligent monitoring system for real-time monitoring and data collection to ensure the accuracy and safety of the lifting process;

[0041] S3.3. Precision adjustment of segment docking: Use high-precision measuring tools to accurately measure the position and posture of the segments, and make necessary adjustments to ensure that the docking accuracy between the segments meets the design requirements. Use precise welding or bolt connection technology to ensure the connection strength and stability between the segments.

[0042] Preferably, the calculation of stability in step S3.1 is shown in formula (3):

[0043]

[0044] Where σ is the stress of the support system, P is the load on the support system, A is the cross-sectional area of ​​the support system, and [σ] is the allowable stress.

[0045] Preferably, step S4 comprises the following steps:

[0046] S4.1. Precise implementation of linear adjustment: According to the pre-camber setting and measurement results, make precise adjustments to the rib linear shape to ensure that the linear shape meets the design requirements. Use jacks or other precision adjustment tools for fine-tuning to ensure the accuracy and stability of the linear adjustment;

[0047] S4.2. Precision construction of arch rib fixation: set up permanent connection between arch rib and pier or cross brace, and make necessary welding or bolt connection to ensure the stability of arch rib, carry out strength calculation and stability verification on the connection part to ensure the reliability and safety of the connection part.

[0048] Preferably, the step S5 comprises the following steps:

[0049] S5.1. Precise organization of subsequent construction: When installing hangers and other auxiliary structures on the arch ribs, accurate measurement and positioning are carried out to ensure the installation accuracy and stability of the hangers and auxiliary structures, and the bridge deck system is constructed, including bridge deck paving and anti-collision guardrails. During the construction process, an intelligent monitoring system is used for real-time monitoring and data collection to ensure construction quality and safety;

[0050] S5.2. Construction monitoring: During the construction process, the stress state and displacement state of the arch ribs shall be continuously monitored and compared with the design calculation values ​​to ensure the safety and accuracy of the construction process;

[0051] S5.3. Use intelligent monitoring system for real-time warning and data analysis: the warning algorithm is the stress warning algorithm process in step S1.3.5, and the data analysis includes data filtering, trend analysis, and anomaly detection.

[0052] Preferably, step S6 comprises the following steps:

[0053] S6.1. Strict implementation of environmental protection measures: Take strict dust suppression measures to reduce dust pollution during construction, protect the surrounding environment, reasonably handle construction waste and sewage, prevent damage to the environment, control construction noise, and reduce the impact on surrounding residents;

[0054] S6.2. Actively promote resource conservation measures: use recyclable materials and support systems to reduce material waste, scientifically plan material transportation, reduce transportation loss rate, and rationally utilize construction waste and scattered steel for recycling or processing into other components.

[0055] Preferably, step S7 comprises the following steps:

[0056] S7.1. Careful inspection after construction: Conduct a comprehensive inspection of the completed arch rib structure, including appearance quality, dimensional accuracy, and connection quality to ensure that the quality meets the design requirements, and carry out necessary repairs and renovations to ensure the integrity and aesthetics of the arch rib structure;

[0057] S7.2. Acceptance and delivery are carried out in accordance with regulations: relevant departments are organized to carry out acceptance work, including quality acceptance and safety acceptance, to ensure that the arch rib structure meets the design requirements and use requirements, and complete construction data and documents are submitted, including construction drawings, construction records, and monitoring data, to provide a basis for subsequent maintenance and management. The completed bridge is delivered to the user unit, and the intelligent monitoring system is handed over and trained to ensure that the user unit can correctly use and maintain the bridge.

[0058] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention ensures accuracy and safety during the construction process through detailed design and precise planning, precise preparation of construction equipment and materials, and application of intelligent safety monitoring systems; adopts technical means such as segment manufacturing and precise transportation, precise erection of temporary support systems, and precise control of segment lifting to improve construction efficiency and quality, reduce errors and rework, and implement intelligent monitoring solutions in the subsequent construction process; ensures safety and accuracy of the construction process through real-time data collection, filtering, trend analysis, and anomaly detection; provides data support for long-term health monitoring of bridges; emphasizes environmental protection and resource conservation; takes measures such as dust suppression, reasonable treatment of construction waste and sewage, and use of turnover materials and support systems to reduce environmental impact and material waste; conducts acceptance in accordance with relevant national and industry standards to ensure that the bridge structure meets design requirements and use requirements; submits complete construction materials and documents to provide a basis for subsequent maintenance and management. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 The present invention is a flow chart of the installation method of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Example 1

[0062] See also Figure 1 The installation method of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge includes the following steps:

[0063] S1. Carry out preliminary preparation and optimization for the installation of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge;

[0064] S2. Segment manufacturing of spatial special-shaped arch rib structures and precise transportation of arch rib segments;

[0065] S3. Implement the lifting and docking of arch rib segments;

[0066] S4. Adjust and fix the linear shape of the spatial special-shaped arch rib;

[0067] S5. Implement intelligent monitoring solutions during subsequent construction;

[0068] S6. Carry out environmental protection and planning to save resources;

[0069] S7. Acceptance inspection of the project shall be conducted upon completion of construction.

[0070] In this embodiment, it should also be noted that the preliminary preparation and optimization of step S1 includes the following steps:

[0071] S1.1. Detailed design and precise planning: For the spatial special-shaped arch rib structure of the large-span basket-carrying steel box arch bridge, detailed structural analysis and precise calculation are carried out to determine the complex geometric shape and size of the arch rib. The following formula should be used for optimization in combination with finite element analysis software, see Formula 1:

[0072]

[0073] Where, L is the calculated span of the arch rib after considering the pre-camber, R is the radius of the arch rib, f is the sagitta of the arch rib, and ΔL is the adjustment value based on the pre-camber setting and construction requirements, which is determined through construction simulation and on-site measurement.

[0074] Formulate a detailed construction plan for the large-span steel box arch bridge, including the hoisting sequence, hoisting method, and temporary support setting, and use intelligent software for simulation analysis to ensure the feasibility and safety of the construction plan;

[0075] S1.2. Precise preparation of construction equipment and materials: Prepare lifting equipment with lifting capacity that meets the requirements, and perform a re-calculation of the lifting capacity to ensure that the arch rib segments can be lifted safely and accurately. The lifting capacity calculation formula is shown in Formula 2:

[0076] Q ≥ k × (W + W w )2;

[0077] Where Q is the rated lifting capacity of the lifting equipment, W is the maximum weight of the arch rib segment, and W w is the additional construction load due to wind load, k is the safety factor;

[0078] Check and ensure that all construction equipment and machinery are in good condition, especially the special equipment and tools required for the construction of large-span basket-lift steel box arch bridges;

[0079] Prepare sufficient construction materials and auxiliary materials, including high-strength steel and precision connectors, to meet the high-precision requirements of the arch rib structure;

[0080] S1.3. Strengthening of on-site arrangements and safety measures.

[0081] In this embodiment, it should be noted that step S1.3 includes the following steps:

[0082] S1.3.1. Clean and level the construction site to ensure sufficient working space, and set up necessary construction platforms and passages to facilitate the lifting and docking of arch rib segments;

[0083] S1.3.2. Set up strict safety facilities and warning signs, especially in high-altitude operations and hoisting areas, to ensure the safety of construction workers;

[0084] S1.3.3. Provide safety education and training for construction personnel on the construction of large-span steel box arch bridges, and arrange intelligent safety monitoring systems. Install sensors to monitor the safety conditions of the construction site in real time, including stress and displacement, and provide real-time warnings through the following algorithms:

[0085] S1.3.4. The early warning algorithm process is sensor data collection, data transmission to the central processing unit, data processing and analysis, comparison with the preset threshold and issuance of early warning signals;

[0086] S1.3.5. Carry out stress warning process, if σ real >σ allow , an early warning is issued;

[0087] In the formula, σ real is the stress value monitored in real time, σ allow is the maximum allowable stress value.

[0088] In this embodiment, it should be noted that step S2 includes the following steps:

[0089] S2.1. Precision control of segment manufacturing: In the factory, arch rib segments are manufactured according to the design drawings and precision manufacturing process requirements to ensure that the size, shape and accuracy of the segments meet the design requirements. The segment quality inspection and pre-assembly are carried out to ensure the docking accuracy and overall quality between the segments;

[0090] S2.2. Precise organization of segment transportation: Use appropriate transportation tools and formulate precise transportation plans to ensure the safety and stability of the segments during transportation. During transportation, take necessary protective measures, including the use of shock-absorbing pads and fixed brackets, to prevent the segments from being damaged or deformed.

[0091] In this embodiment, it should be noted that step S3 includes the following steps:

[0092] S3.1. Precise erection of temporary support system: Erect a temporary support system for hoisting on the bridge pier or temporary tower, and perform stability calculation and optimization to ensure that the support system can bear the weight of the arch rib segment and the construction load;

[0093] S3.2. Precision control of segment lifting: Use a crane or cable lifting system and formulate a precise lifting plan to ensure that the segment can be accurately and smoothly lifted onto the temporary support system. During the lifting process, use an intelligent monitoring system for real-time monitoring and data collection to ensure the accuracy and safety of the lifting process;

[0094] S3.3. Precision adjustment of segment docking: Use high-precision measuring tools to accurately measure the position and posture of the segments, and make necessary adjustments to ensure that the docking accuracy between the segments meets the design requirements. Use precise welding or bolt connection technology to ensure the connection strength and stability between the segments.

[0095] In this embodiment, it should also be noted that the calculation of stability in step S3.1 is shown in Formula 3:

[0096]

[0097] Where σ is the stress of the support system, P is the load on the support system, A is the cross-sectional area of ​​the support system, and [σ] is the allowable stress.

[0098] In this embodiment, it should be noted that step S4 includes the following steps:

[0099] S4.1. Precise implementation of linear adjustment: According to the pre-camber setting and measurement results, make precise adjustments to the rib linear shape to ensure that the linear shape meets the design requirements. Use jacks or other precision adjustment tools for fine-tuning to ensure the accuracy and stability of the linear adjustment;

[0100] S4.2. Precision construction of arch rib fixation: set up permanent connection between arch rib and pier or cross brace, and make necessary welding or bolt connection to ensure the stability of arch rib, carry out strength calculation and stability verification on the connection part to ensure the reliability and safety of the connection part.

[0101] In this embodiment, it should be noted that step S5 includes the following steps:

[0102] S5.1. Precise organization of subsequent construction: When installing hangers and other auxiliary structures on the arch ribs, accurate measurement and positioning are carried out to ensure the installation accuracy and stability of the hangers and auxiliary structures, and the bridge deck system is constructed, including bridge deck paving and anti-collision guardrails. During the construction process, an intelligent monitoring system is used for real-time monitoring and data collection to ensure construction quality and safety;

[0103] S5.2. Construction monitoring: During the construction process, the stress state and displacement state of the arch ribs shall be continuously monitored and compared with the design calculation values ​​to ensure the safety and accuracy of the construction process;

[0104] S5.3. Use intelligent monitoring system for real-time warning and data analysis: the warning algorithm is the stress warning algorithm process in step S1.3.5, and the data analysis includes data filtering, trend analysis, and anomaly detection.

[0105] In this embodiment, it should be noted that step S6 includes the following steps:

[0106] S6.1. Strict implementation of environmental protection measures: Take strict dust suppression measures to reduce dust pollution during construction, protect the surrounding environment, reasonably handle construction waste and sewage, prevent damage to the environment, control construction noise, and reduce the impact on surrounding residents;

[0107] S6.2. Actively promote resource conservation measures: use recyclable materials and support systems to reduce material waste, scientifically plan material transportation, reduce transportation loss rate, and rationally utilize construction waste and scattered steel for recycling or processing into other components.

[0108] In this embodiment, it should be noted that step S7 includes the following steps:

[0109] S7.1. Careful inspection after construction: Conduct a comprehensive inspection of the completed arch rib structure, including appearance quality, dimensional accuracy, and connection quality to ensure that the quality meets the design requirements, and carry out necessary repairs and renovations to ensure the integrity and aesthetics of the arch rib structure;

[0110] S7.2. Acceptance and delivery are carried out in accordance with regulations: relevant departments are organized to carry out acceptance work, including quality acceptance and safety acceptance, to ensure that the arch rib structure meets the design requirements and use requirements, and complete construction data and documents are submitted, including construction drawings, construction records, and monitoring data, to provide a basis for subsequent maintenance and management. The completed bridge is delivered to the user unit, and the intelligent monitoring system is handed over and trained to ensure that the user unit can correctly use and maintain the bridge.

[0111] Example 2

[0112] In the actual construction application process of the installation of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge, specifically, the arch rib structure installation method includes the following steps:

[0113] The installation method of the spatial special-shaped arch rib structure of a large-span basket steel box arch bridge comprises the following steps:

[0114] S1. Preliminary preparation and optimization for the installation of the spatial special-shaped arch rib structure of the large-span steel box arch bridge:

[0115] S1.1. Detailed design and precise planning: For the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge, detailed structural analysis and precise calculation are carried out to determine the complex geometric shape and size of the arch rib. The following formula should be used for optimization in combination with finite element analysis software, see formula (1):

[0116]

[0117] Where, L is the calculated span of the arch rib after considering the pre-camber, R is the radius of the arch rib, f is the sagitta of the arch rib, and ΔL is the adjustment value based on the pre-camber setting and construction requirements, which is determined through construction simulation and on-site measurement.

[0118] Formulate a detailed construction plan for the large-span steel box arch bridge, including the hoisting sequence, hoisting method, and temporary support setting, and use intelligent software for simulation analysis to ensure the feasibility and safety of the construction plan;

[0119] S1.2. Precise preparation of construction equipment and materials: Prepare hoisting equipment with hoisting capacity that meets the requirements, and perform a re-calculation of the hoisting capacity to ensure that the arch rib segments can be hoisted safely and accurately. The hoisting capacity calculation formula is shown in formula (2):

[0120] Q ≥ k × (W + W w )(2);

[0121] Where Q is the rated lifting capacity of the lifting equipment, W is the maximum weight of the arch rib segment, and W w is the additional construction load due to wind load, k is the safety factor;

[0122] Check and ensure that all construction equipment and machinery are in good condition, especially the special equipment and tools required for the construction of large-span basket-lift steel box arch bridges;

[0123] Prepare sufficient construction materials and auxiliary materials, including high-strength steel and precision connectors, to meet the high-precision requirements of the arch rib structure;

[0124] S1.3. Site layout and strengthening of safety measures:

[0125] S1.3.1. Clean and level the construction site to ensure sufficient working space, and set up necessary construction platforms and passages to facilitate the lifting and docking of arch rib segments;

[0126] S1.3.2. Set up strict safety facilities and warning signs, especially in high-altitude operations and hoisting areas, to ensure the safety of construction workers;

[0127] S1.3.3. Provide safety education and training for construction personnel on the construction of large-span steel box arch bridges, and arrange intelligent safety monitoring systems. Install sensors to monitor the safety conditions of the construction site in real time, including stress and displacement, and provide real-time warnings through the following algorithms:

[0128] S1.3.4. The early warning algorithm process is sensor data collection, data transmission to the central processing unit, data processing and analysis, comparison with the preset threshold and issuance of early warning signals;

[0129] S1.3.5. Carry out stress warning process, if σ real >σ allow , an early warning is issued;

[0130] In the formula, σ real is the stress value monitored in real time, σ allow is the maximum allowable stress value;

[0131] S2. Segment manufacturing of spatial special-shaped arch rib structures and precise transportation of arch rib segments:

[0132] S2.1. Precision control of segment manufacturing: In the factory, arch rib segments are manufactured according to the design drawings and precision manufacturing process requirements to ensure that the size, shape and accuracy of the segments meet the design requirements. The segment quality inspection and pre-assembly are carried out to ensure the docking accuracy and overall quality between the segments;

[0133] S2.2. Precise organization of segment transportation: Use appropriate transportation tools and formulate precise transportation plans to ensure the safety and stability of the segments during transportation. During transportation, take necessary protective measures, including using shock-absorbing pads and fixed brackets, to prevent the segments from being damaged or deformed;

[0134] S3. Implement the lifting and docking of arch rib segments:

[0135] S3.1. Precision erection of temporary support system: A temporary support system for hoisting is erected on the bridge pier or temporary tower, and stability calculation and optimization are performed to ensure that the support system can withstand the weight of the arch rib segment and the construction load. The stability calculation is shown in formula (3):

[0136]

[0137] Where σ is the stress of the support system, P is the load on the support system, A is the cross-sectional area of ​​the support system, and [σ] is the allowable stress;

[0138] S3.2. Precision control of segment lifting: Use a crane or cable lifting system and formulate a precise lifting plan to ensure that the segment can be accurately and smoothly lifted onto the temporary support system. During the lifting process, use an intelligent monitoring system for real-time monitoring and data collection to ensure the accuracy and safety of the lifting process;

[0139] S3.3. Precision adjustment of segment docking: Use high-precision measuring tools to accurately measure the position and posture of the segments, and make necessary adjustments to ensure that the docking accuracy between the segments meets the design requirements. Use precision welding or bolt connection technology to ensure the connection strength and stability between the segments;

[0140] S4. Adjust and fix the linear shape of the spatial special-shaped arch ribs:

[0141] S4.1. Precise implementation of linear adjustment: According to the pre-camber setting and measurement results, make precise adjustments to the rib linear shape to ensure that the linear shape meets the design requirements. Use jacks or other precision adjustment tools for fine-tuning to ensure the accuracy and stability of the linear adjustment;

[0142] S4.2. Precision construction of arch rib fixation: set up permanent connections between arch ribs and bridge piers or cross braces, and make necessary welding or bolt connections to ensure the stability of arch ribs. Perform strength calculations and stability checks on connection parts to ensure the reliability and safety of connection parts.

[0143] S5. Implement intelligent monitoring solutions during subsequent construction:

[0144] S5.1. Precise organization of subsequent construction: When installing hangers and other auxiliary structures on the arch ribs, accurate measurement and positioning are carried out to ensure the installation accuracy and stability of the hangers and auxiliary structures, and the bridge deck system is constructed, including bridge deck paving and anti-collision guardrails. During the construction process, an intelligent monitoring system is used for real-time monitoring and data collection to ensure construction quality and safety;

[0145] S5.2. Construction monitoring: During the construction process, the stress state and displacement state of the arch ribs shall be continuously monitored and compared with the design calculation values ​​to ensure the safety and accuracy of the construction process;

[0146] S5.3. Use intelligent monitoring system for real-time warning and data analysis: the warning algorithm is the stress warning algorithm process in step S1.3.5, and the data analysis includes data filtering, trend analysis, and anomaly detection;

[0147] Specifically, the data filtering uses a low-pass filter to process the collected raw data to remove high-frequency noise. The filtering algorithm uses the Kalman filter algorithm, see formula (4):

[0148]

[0149] In the formula, y t is the filtered data, x t -i is the original data, n is the window size of the moving average;

[0150] The filtered data is subjected to trend analysis to determine whether the stress state and displacement state of the arch rib are within the normal range. The trend analysis adopts the linear regression method, as shown in formula (5):

[0151] y=ax+b(5);

[0152] In the formula, y is the predicted value, x is the time or construction stage, and a and b are regression coefficients. By calculating the regression coefficients, the trend of the data can be determined;

[0153] Anomaly detection is performed on the data after trend analysis to identify possible construction anomalies or structural anomalies. Anomaly detection uses a threshold-based method to set a threshold range. When the data exceeds this range, it is considered abnormal.

[0154] S6. Carry out environmental protection and planning to save resources:

[0155] S6.1. Strict implementation of environmental protection measures: Take strict dust suppression measures to reduce dust pollution during construction, protect the surrounding environment, reasonably handle construction waste and sewage, prevent damage to the environment, control construction noise, and reduce the impact on surrounding residents;

[0156] S6.2. Actively promote resource conservation measures: use recyclable materials and support systems to reduce material waste, scientifically plan material transportation, reduce transportation loss rate, and rationally utilize construction waste and scattered steel for recycling or processing into other components

[0157] S7. Acceptance of the project after completion of construction:

[0158] S7.1. Careful inspection after construction: Conduct a comprehensive inspection of the completed arch rib structure, including appearance quality, dimensional accuracy, and connection quality to ensure that the quality meets the design requirements, and carry out necessary repairs and renovations to ensure the integrity and aesthetics of the arch rib structure;

[0159] S7.2. Acceptance and delivery are carried out in accordance with regulations: relevant departments are organized to carry out acceptance work, including quality acceptance and safety acceptance, to ensure that the arch rib structure meets the design requirements and use requirements, and complete construction data and documents are submitted, including construction drawings, construction records, and monitoring data, to provide a basis for subsequent maintenance and management. The completed bridge is delivered to the user unit, and the intelligent monitoring system is handed over and trained to ensure that the user unit can correctly use and maintain the bridge.

[0160] It should be noted that the construction standards in steps S1 to S6 of this embodiment are carried out according to the following standards:

[0161] Technical Specifications for Highway Bridge and Culvert Construction (JTG / T F50-2011);

[0162] Highway Engineering Quality Inspection and Assessment Standards (JTG F80 / 1-2017);

[0163] It should also be noted that the acceptance criteria in step S7 of this embodiment are performed according to the following criteria:

[0164] "Highway Engineering Quality Inspection and Assessment Standards".

[0165] In summary, the present invention solves the problems of construction control and stability of large-span bridges to ensure the construction quality of large-span bridges, and plays a guiding role in the subsequent construction and design of large-span bridges. By adopting modern technical means such as precision control, intelligent monitoring and data analysis, the shortcomings of traditional arch rib structure installation methods are overcome, the construction accuracy, efficiency, safety and environmental protection are improved, and a more scientific, efficient and sustainable solution is provided for the construction of modern bridge projects.

[0166] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The installation method of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge is characterized in that: The following steps are involved: S1. Carry out preliminary preparation and optimization for the installation of the spatial special-shaped arch rib structure of the large-span basket steel box arch bridge; S2. Segment manufacturing of spatial special-shaped arch rib structures and precise transportation of arch rib segments; S3. Implement the lifting and docking of arch rib segments; S4. Adjust and fix the linear shape of the spatial special-shaped arch rib; S5. Implement intelligent monitoring solutions during subsequent construction; S6. Carry out environmental protection and planning to save resources; S7. Acceptance inspection of the project shall be conducted upon completion of construction.

2. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 1 is characterized in that: The preliminary preparation and optimization of step S1 includes the following steps: S1.

1. Detailed design and precise planning: For the spatial special-shaped arch rib structure of the large-span steel box arch bridge, detailed structural analysis and precise calculation are carried out. When determining the complex geometric shape and size of the arch rib, the following formula should be used, and finite element analysis software should be used for optimization. A detailed construction plan for the large-span steel box arch bridge should be formulated, including the hoisting sequence, hoisting method, and temporary support setting. Intelligent software should be used for simulation analysis to ensure the feasibility and safety of the construction plan; S1.

2. Precise preparation of construction equipment and materials: prepare lifting equipment with lifting capacity that meets the requirements, and conduct re-calculation of the lifting capacity to ensure that the arch rib segments can be lifted safely and accurately. Check and ensure that all construction equipment and machinery are in good condition, especially the special equipment and tools required for the construction of large-span basket steel box arch bridges; Prepare sufficient construction materials and auxiliary materials, including high-strength steel and precision connectors, to meet the high-precision requirements of the arch rib structure; S1.

3. Strengthening of on-site arrangements and safety measures.

3. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 2 is characterized in that: The step S1.3 comprises the following steps: S1.3.

1. Clean and level the construction site to ensure sufficient working space, and set up necessary construction platforms and passages to facilitate the lifting and docking of arch rib segments; S1.3.

2. Set up strict safety facilities and warning signs, especially in high-altitude operations and hoisting areas, to ensure the safety of construction workers; S1.3.

3. Provide safety education and training for construction personnel on the construction of large-span steel box arch bridges, and arrange intelligent safety monitoring systems. Install sensors to monitor the safety conditions of the construction site in real time, including stress and displacement, and provide real-time warnings through the following algorithms: S1.3.

4. The early warning algorithm process is sensor data collection, data transmission to the central processing unit, data processing and analysis, comparison with the preset threshold and issuance of early warning signals; S1.3.

5. Carry out stress warning process.

4. The installation method of the spatial special-shaped arch rib structure of the long-span basket steel box arch bridge according to claim 3 is characterized in that: The step S2 comprises the following steps: S2.

1. Precision control of segment manufacturing: In the factory, arch rib segments are manufactured according to the design drawings and precision manufacturing process requirements to ensure that the size, shape and accuracy of the segments meet the design requirements. The segment quality inspection and pre-assembly are carried out to ensure the docking accuracy and overall quality between the segments; S2.

2. Precise organization of segment transportation: Use appropriate transportation tools and formulate precise transportation plans to ensure the safety and stability of the segments during transportation. During transportation, take necessary protective measures, including the use of shock-absorbing pads and fixed brackets, to prevent the segments from being damaged or deformed.

5. The installation method of the spatial special-shaped arch rib structure of the long-span basket steel box arch bridge according to claim 4 is characterized in that: The step S3 comprises the following steps: S3.

1. Precise erection of temporary support system: Erect a temporary support system for hoisting on the bridge pier or temporary tower, and perform stability calculation and optimization to ensure that the support system can bear the weight of the arch rib segment and the construction load; S3.

2. Precision control of segment lifting: Use a crane or cable lifting system and formulate a precise lifting plan to ensure that the segment can be accurately and smoothly lifted onto the temporary support system. During the lifting process, use an intelligent monitoring system for real-time monitoring and data collection to ensure the accuracy and safety of the lifting process; S3.

3. Precision adjustment of segment docking: Use high-precision measuring tools to accurately measure the position and posture of the segments, and make necessary adjustments to ensure that the docking accuracy between the segments meets the design requirements. Use precise welding or bolt connection technology to ensure the connection strength and stability between the segments.

6. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 5 is characterized in that: The calculation formula for stability in step S3.1 is: Where σ is the stress of the support system, P is the load on the support system, A is the cross-sectional area of ​​the support system, and [σ] is the allowable stress.

7. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 6 is characterized in that: The step S4 comprises the following steps: S4.

1. Precise implementation of linear adjustment: According to the pre-camber setting and measurement results, make precise adjustments to the rib linear shape to ensure that the linear shape meets the design requirements. Use jacks or other precision adjustment tools for fine-tuning to ensure the accuracy and stability of the linear adjustment; S4.

2. Precision construction of arch rib fixation: set up permanent connection between arch rib and pier or cross brace, and make necessary welding or bolt connection to ensure the stability of arch rib, carry out strength calculation and stability verification on the connection part to ensure the reliability and safety of the connection part.

8. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 7 is characterized in that: The step S5 comprises the following steps: S5.

1. Precise organization of subsequent construction: When installing hangers and other auxiliary structures on the arch ribs, accurate measurement and positioning are carried out to ensure the installation accuracy and stability of the hangers and auxiliary structures, and the bridge deck system is constructed, including bridge deck paving and anti-collision guardrails. During the construction process, an intelligent monitoring system is used for real-time monitoring and data collection to ensure construction quality and safety; S5.

2. Construction monitoring: During the construction process, the stress state and displacement state of the arch ribs shall be continuously monitored and compared with the design calculation values ​​to ensure the safety and accuracy of the construction process; S5.

3. Use intelligent monitoring system for real-time warning and data analysis: the warning algorithm is the stress warning algorithm process in step S1.3.5, and the data analysis includes data filtering, trend analysis, and anomaly detection.

9. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 8 is characterized in that: The step S6 comprises the following steps: S6.

1. Strict implementation of environmental protection measures: Take strict dust suppression measures to reduce dust pollution during construction, protect the surrounding environment, reasonably handle construction waste and sewage, prevent damage to the environment, control construction noise, and reduce the impact on surrounding residents; S6.

2. Actively promote resource conservation measures: use recyclable materials and support systems to reduce material waste, scientifically plan material transportation, reduce transportation loss rate, and rationally utilize construction waste and scattered steel for recycling or processing into other components.

10. The installation method of the spatial special-shaped arch rib structure of the long-span basket handle steel box arch bridge according to claim 9 is characterized in that: The step S7 comprises the following steps: S7.

1. Careful inspection after construction: Conduct a comprehensive inspection of the completed arch rib structure, including appearance quality, dimensional accuracy, and connection quality to ensure that the quality meets the design requirements, and carry out necessary repairs and renovations to ensure the integrity and aesthetics of the arch rib structure; S7.

2. Acceptance and delivery are carried out in accordance with regulations: relevant departments are organized to carry out acceptance work, including quality acceptance and safety acceptance, to ensure that the arch rib structure meets the design requirements and use requirements, and complete construction data and documents are submitted, including construction drawings, construction records, and monitoring data, to provide a basis for subsequent maintenance and management. The completed bridge is delivered to the user unit, and the intelligent monitoring system is handed over and trained to ensure that the user unit can correctly use and maintain the bridge.

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