Construction stability monitoring and control system and method for large-span open-arch bridges

Abstract

The invention relates to the technical field of construction monitoring, and specifically discloses a monitoring and control system and method for the construction stability of a large-span hollow arch bridge. The system comprises: a structural data acquisition module that acquires structural data of all key parts currently existing in the construction structure of the large-span hollow arch bridge in real time; a structural data analysis module that analyzes structural characteristics, structural data change characteristics and the current construction stage of the construction structure of the large-span hollow arch bridge; a stability monitoring module that inputs the current construction stage, structural characteristics and structural data change characteristics of the construction structure of the large-span hollow arch bridge into a construction stability evaluation model to obtain a structural stability index under the current construction state; and a stability control module that starts corresponding control measures when monitoring that the structural stability index is close to a critical value to obtain a construction stability control result; and the real-time monitoring and effective control of the construction stability of the large-span hollow arch bridge are realized, thereby improving the safety and reliability of the construction.

Description

Technical Field

[0001] The invention relates to the technical field of construction monitoring, and in particular to a monitoring and control system and method for the construction stability of a large-span hollow arch bridge. Background Art

[0002] In the field of modern bridge engineering construction, long-span open-web arch bridges have become an important choice for many large-scale transportation infrastructure projects due to their strong spanning ability and high load-bearing capacity. However, the construction process of such bridges is extremely complex and faces many severe challenges. The construction of long-span open-web arch bridges is a dynamic process involving many key parts, such as arch feet, arch crowns, arch ribs, and columns, and the stress state of the structure continues to change during construction. With the continuous growth of society's demand for transportation and the increasingly complex and diverse construction environment, the span of bridges continues to increase, and the construction environment becomes more and more demanding, which puts more stringent requirements on stability during the construction process.

[0003] Under the current technical conditions, the existing analysis means and methods for the acquired structural data are relatively simple and extensive, and it is difficult to deeply and accurately extract the characteristics of the structure and the law of data changes, thus failing to provide strong support for the accurate assessment of construction stability. In addition, when constructing the existing construction stability assessment model, the characteristics of the construction stage and the complexity of the structure are not fully and comprehensively considered, resulting in a significant reduction in the accuracy, reliability and practicality of the assessment results, making it difficult to meet the actual project's demand for precise control of construction stability.

[0004] Therefore, the present invention proposes a construction stability monitoring and control system and method for a large-span hollow arch bridge. Summary of the invention

[0005] The present invention provides a monitoring and control system and method for the construction stability of a large-span open-web arch bridge, which can acquire the structural data of key parts in real time through a structural data acquisition module, thereby ensuring the timeliness and comprehensiveness of the data. The structural data analysis module can deeply analyze the various characteristics and construction stages of the structure, and provide detailed information for subsequent evaluation. The stability monitoring module uses the construction stability evaluation model to derive the structural stability index, making the evaluation more scientific and accurate. The stability control module activates control measures when the structural stability index approaches the critical value, timely prevents risks, and ensures construction safety. Real-time monitoring and effective control of the construction stability of a large-span open-web arch bridge are achieved, thereby improving the safety and reliability of the construction.

[0006] The present invention provides a long-span open-web arch bridge construction stability monitoring and control system, comprising:

[0007] The structural data acquisition module is used to obtain the structural data of all key parts currently existing in the construction structure of the large-span open-arch bridge in real time;

[0008] The structural data analysis module is used to analyze the structural characteristics, structural data change characteristics and current construction stage of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0009] The stability monitoring module is used to input the current construction stage, structural characteristics, and structural data change characteristics of the large-span open-arch bridge construction structure into the construction stability evaluation model to obtain the structural stability index under the current construction state;

[0010] The stability control module is used to initiate corresponding control measures when it is monitored that the structural stability index is close to the critical value, so as to obtain the construction stability control result.

[0011] Preferably, the structure data acquisition module includes:

[0012] The data acquisition submodule is used to obtain the displacement, stress and strain data of all key parts currently existing in the construction structure of the long-span open-web arch bridge in real time based on the high-precision sensors installed in all key parts of the long-span open-web arch bridge structure;

[0013] The data processing submodule is used to clean and fill in the null values ​​of the displacement, stress and strain data of all key parts currently existing in the construction structure of the long-span hollow arch bridge that are continuously acquired, so as to obtain the structural data of all key parts currently existing in the construction structure of the long-span hollow arch bridge.

[0014] Preferably, the structural data analysis module includes:

[0015] The first step fine positioning submodule is used to obtain the first step fine positioning construction stage of the large-span open-web arch bridge construction structure based on the construction procedures in the construction plan and the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure;

[0016] The structural characteristics and change characteristics analysis submodule is used to analyze the structural characteristics and structural data change characteristics of the long-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the long-span hollow arch bridge construction structure;

[0017] The second-step fine positioning submodule is used to perform fine positioning of the second-step construction stage on the basis of the first-step fine positioning construction stage of the large-span hollow arch bridge construction structure based on the structural characteristics and structural data characteristics of the large-span hollow arch bridge construction structure, so as to obtain the current construction stage of the large-span hollow arch bridge construction structure.

[0018] Preferably, the first step of fine positioning of the submodule includes:

[0019] A coarse positioning unit is used to coarsely position the construction stage based on the construction process in the construction plan to obtain the current coarsely positioned construction stage;

[0020] The first step fine positioning unit is used to perform fine positioning of the first construction stage on the basis of the current rough positioning construction stage based on all key part types contained in the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure and all structural data types of each key part, so as to obtain the first step fine positioning construction stage of the large-span open-web arch bridge construction structure.

[0021] Preferably, the structural feature and variation feature analysis submodule includes:

[0022] A structural characteristic analysis unit is used to analyze the structural characteristics of the long-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the long-span hollow arch bridge construction structure;

[0023] The variation characteristic analysis unit is used for analyzing the variation characteristics of the structural data of the large-span hollow arch bridge construction structure based on the structural characteristics of the large-span hollow arch bridge construction structure.

[0024] Preferably, the structural feature analysis unit comprises:

[0025] A geometric feature analysis subunit is used to analyze the continuous geometric features of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0026] The mechanical characteristics analysis subunit is used to analyze the continuous mechanical characteristics of the large-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the large-span hollow arch bridge construction structure;

[0027] The material characteristic analysis subunit is used to analyze the continuous material characteristics of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0028] Among them, the structural characteristics of the large-span hollow arch bridge construction structure include: continuous geometric characteristics, continuous mechanical characteristics, and continuous material characteristics of the large-span hollow arch bridge construction structure.

[0029] Preferably, the change characteristic analysis unit comprises:

[0030] The continuous data classification subunit is used to generate a curve function of each type of structural feature continuous data in the structural features of the large-span hollow arch bridge construction structure, and judge whether a sudden change occurs in each type of structural feature continuous data based on the curve function of each type of structural feature continuous data. If so, the corresponding type of structural feature continuous data is regarded as the first key focus structural feature continuous data, and all sudden change sections and all sudden change sections of the change trend of the corresponding type of structural feature continuous data are determined; otherwise, based on the first-order derivative function of the curve function of the corresponding type of structural feature continuous data, it is judged whether a sudden change trend occurs in each type of structural feature continuous data; if so, the corresponding type of structural feature continuous data is regarded as the second key focus structural feature continuous data, and all sudden change sections of the change trend of the corresponding type of structural feature continuous data are determined; otherwise, the corresponding type of structural feature continuous data is regarded as non-key focus structural feature continuous data;

[0031] A synchronous correlation analysis subunit is used to analyze the synchronous correlation between all class structure feature continuous data;

[0032] The structural characteristic analysis subunit is used to perform linear analysis or nonlinear analysis on the structural characteristics of the large-span open-web arch bridge construction structure to obtain all current response levels of the large-span open-web arch bridge construction structure;

[0033] Among them, the structural data change characteristics of the large-span open-web arch bridge construction structure include the synchronous correlation between all types of structural feature continuous data and all current response levels.

[0034] Preferably, the synchronization correlation analysis subunit comprises:

[0035] The first synchronous correlation analysis terminal is used to analyze the synchronous correlation between all data segments except all sudden change segments and all sudden change trend segments in all first key focus structural feature continuous data and all non-key focus structural feature continuous data;

[0036] The second synchronous correlation analysis terminal is used to analyze the synchronous correlation between all the change trend sudden change sections in all the first key focus structural feature continuous data and all the change trend sudden change sections in all the second key focus structural feature continuous data;

[0037] The third synchronous correlation analysis terminal is used to analyze the synchronous correlation between all the sudden change sections in all the first key focus structural feature continuous data;

[0038] Among them, the synchronous correlation between all class structural feature continuous data includes: the synchronous correlation between all data segments except all sudden change segments and all change trend sudden change segments in all first-focus structural feature continuous data and all non-focus structural feature continuous data, the synchronous correlation between all change trend sudden change segments in all first-focus structural feature continuous data and all change trend sudden change segments in all second-focus structural feature continuous data, and the synchronous correlation between all sudden change segments in all first-focus structural feature continuous data.

[0039] Preferably, the structural feature analysis subunit comprises:

[0040] The buckling analysis end is used to generate a finite element model of the large-span hollow arch bridge construction safety structure when it is determined based on the structural characteristics of the large-span hollow arch bridge construction structure that the large-span hollow arch bridge construction structure has not undergone a large structural deformation and the material has not entered a nonlinear stage, and obtain a linear buckling analysis result based on the finite element model of the large-span hollow arch bridge construction safety structure, and calculate the current buckling analysis response degree of the large-span hollow arch bridge construction structure based on the structural characteristics of the large-span hollow arch bridge construction structure and the linear buckling analysis result;

[0041] The geometric nonlinear analysis end is used to solve the geometric nonlinear equilibrium equation of the safety structure of the large-span hollow arch bridge construction when it is determined that the large-span hollow arch bridge construction structure has a large structural deformation based on the structural characteristics of the large-span hollow arch bridge construction structure, and calculate the current geometric nonlinear analysis response degree of the large-span hollow arch bridge construction structure based on the structural characteristics and geometric nonlinear equilibrium equation of the large-span hollow arch bridge construction structure;

[0042] The material nonlinear analysis end is used to analyze the nonlinear behavior analysis response degree of each material in the finite element model of the large-span hollow arch bridge construction safety structure based on the constitutive relationship of all materials when it is determined that the material of the large-span hollow arch bridge construction structure enters the nonlinear stage based on the structural characteristics of the large-span hollow arch bridge construction structure;

[0043] Among them, all current response levels of the long-span open-web arch bridge construction structure include the current buckling analysis response level or the current geometric nonlinear analysis response level or / and the nonlinear behavior analysis response level of the long-span open-web arch bridge construction structure.

[0044] The present invention provides a method for monitoring and controlling the construction stability of a large-span open-web arch bridge, which is applied to any of the above-mentioned large-span open-web arch bridge construction stability monitoring and control systems, comprising:

[0045] S1: Real-time acquisition of structural data of all key parts currently existing in the construction structure of a large-span open-arch bridge;

[0046] S2: Analyze the structural characteristics, structural data change characteristics and current construction stage of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0047] S3: Based on the current construction stage, structural characteristics, structural data change characteristics and construction stability evaluation model of the large-span open-arch bridge construction structure, the structural stability index under the current construction state is obtained;

[0048] S4: When it is monitored that the structural stability index is close to the critical value, the corresponding control measures are initiated to obtain the construction stability control results.

[0049] The beneficial effects of the present invention compared to the prior art are as follows: the structural data acquisition module can obtain the structural data of key parts in real time, ensuring the timeliness and comprehensiveness of the data. The structural data analysis module can deeply analyze the various characteristics and construction stages of the structure, and provide detailed information for subsequent evaluation. The stability monitoring module uses the construction stability evaluation model to obtain the structural stability index, making the evaluation more scientific and accurate. The stability control module starts the control measures when the structural stability index approaches the critical value, timely prevents risks, and ensures construction safety. Real-time monitoring and effective control of the construction stability of large-span hollow arch bridges are achieved, improving the safety and reliability of construction.

[0050] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0051] The technical solution of the present invention is further described in detail below through the accompanying 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 and do not constitute a limitation of the present invention. In the accompanying drawings:

[0053] Figure 1 Schematic diagram of a large-span hollow arch bridge construction stability monitoring and control system in an embodiment of the present invention;

[0054] Figure 2 Schematic diagram of the change of stability coefficient during the construction phase in an embodiment of the present invention;

[0055] Figure 3 It is a flow chart of the construction stability monitoring and control method of a large-span hollow arch bridge in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0057] Example 1

[0058] The present invention provides a large-span open-web arch bridge construction stability monitoring and control system, referring to Figure 1 and Figure 2 ,include:

[0059] The structural data acquisition module is used to obtain the structural data of all key parts currently existing in the construction structure of the long-span open-web arch bridge in real time;

[0060] The structural data analysis module is used to analyze the structural characteristics, structural data change characteristics and current construction stage of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0061] The stability monitoring module is used to input the current construction stage, structural characteristics, and structural data change characteristics of the large-span open-arch bridge construction structure into the construction stability evaluation model to obtain the structural stability index under the current construction state;

[0062] The stability control module is used to initiate corresponding control measures when it is monitored that the structural stability index is close to the critical value, so as to obtain the construction stability control result.

[0063] In this embodiment, the construction structure of a large-span open-web arch bridge refers to the overall structure of the large-span open-web arch bridge under construction, including various components such as arch rings, arch feet, arch crowns, arch ribs, columns, bridge decks, and the connection methods and force relationships between them. During the construction process, this structure will continue to change and develop with the progress of the construction, and its mechanical properties and stability are also in dynamic change. For example, the construction structure of a large-span top-supported cast-in-place reinforced concrete open-web arch bridge such as the Lushui River Bridge includes the specific construction and combination methods in the process of erecting, pouring and connecting various components.

[0064] In this embodiment, all key parts currently existing in the construction structure of the long-span open-web arch bridge refer to the parts that play an important role in the stability and safety of the structure during the construction of the long-span open-web arch bridge, such as the arch foot, arch crown, arch ribs, etc. For example, the 20 pile foundations, 4 arch seats, and arch ring brackets in the Lushui River Bridge.

[0065] In this embodiment, structural data refers to data related to the construction structure of a large-span open-web arch bridge, including displacement, stress, strain, etc. For example, displacement data at the arch foot, stress data at the arch rib, etc.

[0066] In this embodiment, the structural characteristics, structural data change characteristics and current construction stage of the large-span open-web arch bridge construction structure: structural characteristics refer to the inherent characteristics of the bridge structure, such as geometric shape, mechanical properties, material properties, etc.; structural data change characteristics refer to the changing rules and trends of structural data during the construction process; the current construction stage refers to the specific steps and links of the construction. For example, the structural characteristics may be the span and height of the arch; structural data change characteristics such as the arch rib stress gradually increases with the progress of construction; the current construction stage may be the pouring of the arch ring.

[0067] In this embodiment, the construction stability assessment model is a mathematical model or algorithm used to assess the stability of a large-span hollow arch bridge during construction. For example, a model that can calculate structural stability indicators based on finite element analysis. The construction stability assessment model generally includes the following steps:

[0068] First, a large number of large-span open-arch bridge construction cases need to be collected as training samples. These cases should cover different construction conditions, structural characteristics, geographical environments, etc. Each training sample should contain the following information: 1. Detailed design parameters of the construction structure, such as the span, height, material properties and other structural characteristics of the arch. 2. Various data during the construction process, including the displacement, stress, strain and other structural data change characteristics of key parts. 3. Detailed stage division of the entire construction process and corresponding construction operations. 4. Data of environmental factors during the construction process, such as temperature, wind speed, etc. 5. Structural stability indicators under the current construction state manually evaluated based on the first four data. The collected training sample data is preprocessed, including data cleaning, removal of outliers, and null value filling, to ensure the quality and accuracy of the data. Then, a suitable model architecture is selected, for example, a model can be built based on a machine learning algorithm (such as a decision tree, random forest) or a deep learning algorithm (such as a neural network). The model is trained using the preprocessed training sample data. During the training process, the parameters of the model are continuously adjusted to improve the prediction accuracy of the model. Finally, the validation set is used to verify and evaluate the trained model to ensure that the model can accurately evaluate the stability of large-span hollow arch bridge construction.

[0069] In this embodiment, the structural stability index in the current construction state is a quantitative value used to measure the structural stability of a large-span hollow arch bridge in the current construction state. Figure 2 Stability coefficient during the construction phase.

[0070] In this embodiment, critical value is a threshold value used to judge whether the structural stability is in a dangerous state. For example, it is set to 0.5, and when the structural stability index is lower than 0.5, it is considered to be close to a dangerous state.

[0071] In this embodiment, when it is monitored that the structural stability index is close to the critical value, the corresponding control measures are initiated to obtain the construction stability control result: when it is monitored that the structural stability index is about to reach the critical value, corresponding measures are taken to adjust the construction or strengthen the structure, and finally the construction stability is controlled. For example, measures such as adding support and adjusting the construction sequence can finally improve the structural stability index.

[0072] In this embodiment, control measures refer to specific methods and means adopted to ensure the construction stability of large-span hollow arch bridges, such as increasing monitoring frequency, adding temporary supports, optimizing construction technology, etc.

[0073] The beneficial effects of the above technologies are as follows: the structural data acquisition module can obtain the structural data of key parts in real time to ensure the timeliness and comprehensiveness of the data. The structural data analysis module can deeply analyze the various characteristics and construction stages of the structure, and provide detailed information for subsequent evaluation. The stability monitoring module uses the construction stability evaluation model to obtain the structural stability index, making the evaluation more scientific and accurate. The stability control module starts the control measures when the structural stability index approaches the critical value, timely prevents risks, and ensures construction safety. Real-time monitoring and effective control of the construction stability of large-span hollow arch bridges are realized, improving the safety and reliability of construction.

[0074] Example 2

[0075] Based on Example 1, the structure data acquisition module includes:

[0076] The data acquisition submodule is used to obtain the displacement, stress and strain data of all key parts currently existing in the construction structure of the long-span open-web arch bridge in real time based on the high-precision sensors installed in all key parts of the long-span open-web arch bridge structure;

[0077] The data processing submodule is used to clean and fill in the null values ​​of the displacement, stress and strain data of all key parts currently existing in the construction structure of the long-span hollow arch bridge that are continuously acquired, so as to obtain the structural data of all key parts currently existing in the construction structure of the long-span hollow arch bridge.

[0078] In this embodiment, high-precision sensor: a device that can accurately measure physical quantities, has the characteristics of high sensitivity and high precision, and is used to obtain data of key parts of the construction structure of a large-span open-web arch bridge. For example, a displacement sensor that can accurately measure displacement to the millimeter level.

[0079] In this embodiment, the displacement, stress and strain data of key parts include the displacement, stress and strain degree of important positions in the construction structure of a large-span hollow arch bridge, such as the horizontal displacement data of the arch foot, the tensile stress data of the arch rib and the strain data of the bridge pier.

[0080] In this embodiment, the displacement, stress, and strain data of all key parts currently existing in the long-span open-web arch bridge construction structure that are continuously acquired are cleaned and filled with empty values ​​to obtain the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure: the original data such as displacement, stress, and strain of the key parts that are continuously acquired are processed to remove noise, erroneous or abnormal data, and to supplement the missing values, so as to obtain more accurate and complete data that can reflect the structural conditions. For example, the obviously abnormal displacement data caused by equipment failure is removed, and the partially missing stress data caused by transmission problems is supplemented.

[0081] The beneficial effects of the above technologies include: the data acquisition submodule obtains key data such as displacement, stress, strain, etc. in real time through high-precision sensors to ensure the originality and accuracy of the data. The data processing submodule cleans and fills in null values ​​for the acquired data, improving the quality and integrity of the data. The cleaned data can more accurately reflect the true state of the structure, providing a reliable basis for subsequent analysis and evaluation. The processed data helps to reduce errors and interference, and improve the accuracy of stability monitoring and control. The reliability and effectiveness of structural data acquisition are guaranteed, providing high-quality data support for the monitoring and control of the stability of large-span hollow arch bridge construction.

[0082] Example 3

[0083] Based on Example 1, the structure data analysis module includes:

[0084] The first step fine positioning submodule is used to obtain the first step fine positioning construction stage of the large-span open-web arch bridge construction structure based on the construction procedures in the construction plan and the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure;

[0085] The structural characteristics and change characteristics analysis submodule is used to analyze the structural characteristics and structural data change characteristics of the long-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the long-span hollow arch bridge construction structure;

[0086] The second-step fine positioning submodule is used to perform fine positioning of the second-step construction stage on the basis of the first-step fine positioning construction stage of the large-span hollow arch bridge construction structure based on the structural characteristics and structural data characteristics of the large-span hollow arch bridge construction structure, so as to obtain the current construction stage of the large-span hollow arch bridge construction structure.

[0087] In this embodiment, the construction process in the construction plan is a series of construction steps and operation procedures with a sequence and specific requirements for the construction of a large-span open-arch bridge formulated before construction, such as first building the arch frame, then pouring the arch ring, and then installing the arch structure.

[0088] In this embodiment, the first step of the large-span open-web arch bridge construction structure is to precisely locate the construction stage: based on the construction plan and some structural data, the construction stage is initially and accurately divided and determined. For example, it is initially determined that the current construction is in the initial stage of arch ring casting.

[0089] In this embodiment, the structural characteristics and structural data change characteristics of the long-span open-web arch bridge construction structure: the structural characteristics refer to the characteristics of the long-span open-web arch bridge construction structure in terms of geometric shape, mechanical properties, material properties, etc.; the structural data change characteristics refer to the change rules and trends of the structure-related data during the construction process. For example, structural characteristics such as the arch span ratio and material strength; structural data change characteristics such as the arch rib stress gradually increases with the construction progress.

[0090] In this embodiment, based on the structural characteristics and structural data characteristics of the large-span open-web arch bridge construction structure, the second step of fine positioning of the construction stage is performed on the basis of the first step of fine positioning of the construction stage of the large-span open-web arch bridge construction structure to obtain the current construction stage of the large-span open-web arch bridge construction structure: on the basis of the construction stage preliminarily determined in the first step, the construction stage is further divided and determined more accurately and meticulously in combination with more detailed structural characteristics and structural data change characteristics to obtain the final current construction stage. For example, the first step is preliminarily determined as the mid-term stage of the arch ring casting stage, and the second step is accurately determined as the casting stage of the middle section of the middle span of the arch ring according to the casting progress and structural data of different parts of the arch ring.

[0091] The beneficial effects of the above technologies include: The first step of fine positioning submodule performs preliminary construction stage positioning based on the construction plan and existing structural data, providing a basis for subsequent analysis. The structural characteristics and change characteristics analysis submodule can accurately analyze the characteristics of the structure and the data change characteristics, which helps to gain a deeper understanding of the structural status. The second step of fine positioning submodule further accurately determines the construction stage based on the first step, improving the accuracy of positioning during the construction stage. Through two-step fine positioning, the current construction stage can be determined more accurately, providing a key basis for stability assessment and control. The accuracy and reliability of the analysis of the construction stage of large-span hollow arch bridges are improved, which is conducive to ensuring construction stability.

[0092] Example 4

[0093] Based on Example 3, the first step of fine positioning of the submodule includes:

[0094] A coarse positioning unit is used to coarsely position the construction stage based on the construction process in the construction plan to obtain the current coarsely positioned construction stage;

[0095] The first step fine positioning unit is used to perform fine positioning of the first construction stage on the basis of the current rough positioning construction stage based on all key part types contained in the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure and all structural data types of each key part, so as to obtain the first step fine positioning construction stage of the large-span open-web arch bridge construction structure.

[0096] In this embodiment, the construction stage is roughly located based on the construction process in the construction plan to obtain the current roughly located construction stage: the approximate stage of the current construction is preliminarily determined according to the order and approximate content of each construction step specified in the pre-made construction plan. For example, the construction plan stipulates that the arch frame is built first and then the arch ring is cast. If the arch frame is currently being built, the roughly located construction stage is the arch frame building stage.

[0097] In this embodiment, the current roughly located construction stage is the approximate range of the construction stage obtained through the above-mentioned preliminary judgment based on the construction process, for example, it may be a relatively broad stage description such as "preliminary preparation for arch ring casting".

[0098] In this embodiment, the key parts types are the classification of different parts that have important roles and influences in the construction structure of a large-span open-web arch bridge, such as arch foot, arch crown, arch rib and other parts.

[0099] In this embodiment, all structural data types of each key part: for each determined key part, various types of structural data involved that can reflect its state and performance. For example, for the arch foot part, the structural data types may include displacement, stress value, material strength, etc.

[0100] In this embodiment, based on all the key parts types contained in the structural data of all the key parts currently existing in the large-span hollow arch bridge construction structure and all the structural data types of each key part, the first step of the construction stage is finely positioned on the basis of the current rough positioning construction stage, and the first step of the fine positioning construction stage of the large-span hollow arch bridge construction structure is obtained: taking into account the detailed information currently obtained about each key part and its corresponding structural data, on the basis of the rough positioning construction stage preliminarily determined before, the construction stage is further accurately divided and determined, and a more accurate and detailed first step of the fine positioning construction stage is obtained. For example, the original rough positioning is the "arch ring casting stage", combined with the detailed analysis of the key parts and structural data types, the fine positioning is the "initial casting of the middle section of the middle span of the arch ring".

[0101] The beneficial effects of the above technology include: the coarse positioning unit performs coarse positioning according to the construction procedures in the construction plan, and can quickly determine the approximate scope of the construction stage. The first step of the fine positioning unit combines the types of key parts and various structural data to further accurately determine the construction stage on the basis of coarse positioning. This step-by-step fine positioning method not only improves the efficiency of positioning, but also ensures the accuracy of positioning. It can more accurately determine the first step of the fine positioning construction stage of the large-span hollow arch bridge construction structure. It provides an important premise for more accurate analysis of structural characteristics, stability assessment and control measures in the future. It improves the scientificity and reliability of positioning during the construction stage, and helps to strengthen the monitoring and control of construction stability.

[0102] Example 5

[0103] On the basis of Example 3, the structural feature and change feature analysis submodule includes:

[0104] A structural characteristic analysis unit is used to analyze the structural characteristics of the long-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the long-span hollow arch bridge construction structure;

[0105] The variation characteristic analysis unit is used for analyzing the variation characteristics of the structural data of the large-span hollow arch bridge construction structure based on the structural characteristics of the large-span hollow arch bridge construction structure.

[0106] The beneficial effects of the above technologies include: the structural feature analysis unit can accurately analyze the inherent characteristics of the construction structure of the large-span open-web arch bridge, providing a basic description for subsequent evaluation and control. The change feature analysis unit further analyzes the changes in the structural data based on the structural characteristics, which helps to timely discover potential problems and trends. By analyzing the structural characteristics and change characteristics separately, the state and evolution of the structure can be understood more specifically. The professionalism and accuracy of the analysis of structural characteristics and change characteristics are improved. It provides strong support for more accurate evaluation of the stability of the construction structure and the formulation of effective control measures. The ability to analyze the structural characteristics and change characteristics of the large-span open-web arch bridge construction is enhanced to ensure the stability and safety of the construction.

[0107] Example 6

[0108] On the basis of Example 5, the structural feature analysis unit comprises:

[0109] A geometric feature analysis subunit is used to analyze the continuous geometric features of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0110] The mechanical characteristics analysis subunit is used to analyze the continuous mechanical characteristics of the large-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the large-span hollow arch bridge construction structure;

[0111] The material characteristic analysis subunit is used to analyze the continuous material characteristics of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0112] Among them, the structural characteristics of the large-span hollow arch bridge construction structure include: continuous geometric characteristics, continuous mechanical characteristics, and continuous material characteristics of the large-span hollow arch bridge construction structure.

[0113] In this embodiment, the continuous geometric features of the long-span hollow arch bridge construction structure are analyzed based on the structural data of all key parts currently existing in the long-span hollow arch bridge construction structure: by processing and analyzing the structural data of key parts in the long-span hollow arch bridge construction structure, the continuous change characteristics of its shape, size, position and other geometric aspects are obtained. For example, the curvature change of the arch rib, the gradual change of the thickness of the arch ring, etc.

[0114] In this embodiment, the continuous geometric characteristics of the long-span open-web arch bridge construction structure refer to the coherent and regular changes in the geometric form of the long-span open-web arch bridge during the construction process, such as the continuous change in the cross-sectional shape and size of the arch from the arch foot to the arch top.

[0115] In this embodiment, the continuous mechanical characteristics of the large-span open-web arch bridge construction structure are analyzed based on the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure: the continuous change characteristics of the mechanical properties of the construction structure are inferred and clarified based on the structural data of the current key parts, such as the stress distribution changes in different parts and the gradual development of the bearing capacity.

[0116] In this embodiment, the continuous mechanical characteristics of the long-span open-web arch bridge construction structure refer to the continuous and regular characteristics of the mechanical performance of the long-span open-web arch bridge structure during the construction period, such as the trend of gradual increase in the stiffness of the structure from the early stage to the middle and late stages of construction.

[0117] In this embodiment, the continuous material characteristics of the long-span open-web arch bridge construction structure are analyzed based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure: the continuous change characteristics of the material properties of the construction structure are obtained according to the structural data of the current key parts. For example, the increase of concrete strength over time and the change of fatigue performance of the material.

[0118] In this embodiment, the continuous material characteristics of the long-span open-web arch bridge construction structure refer to the continuous and regular characteristics of the performance of the materials used in the long-span open-web arch bridge during the construction process, such as the continuous changes in the durability of the material with the environment and time.

[0119] The beneficial effects of the above technologies include: the geometric feature analysis subunit can analyze the continuous geometric features of the construction structure, which helps to understand the shape and size of the structure. The mechanical feature analysis subunit can derive continuous mechanical features, which provides a key basis for evaluating the bearing capacity and stability of the structure. The material feature analysis subunit can analyze continuous material features, which helps to understand the impact of material properties on the structure. Taking into account the geometric, mechanical and material characteristics, the characteristics of the construction structure of the large-span hollow arch bridge are comprehensively and accurately described. It provides a detailed and reliable basis for more accurate evaluation of the stability of the construction structure and the formulation of corresponding control measures. It improves the comprehensiveness and accuracy of the analysis of the construction structure characteristics of the large-span hollow arch bridge, and ensures the stability and safety of the construction process.

[0120] Example 7

[0121] On the basis of Example 5, the change characteristic analysis unit includes:

[0122] The continuous data classification subunit is used to generate a curve function of each type of structural feature continuous data in the structural features of the large-span hollow arch bridge construction structure, and judge whether a sudden change occurs in each type of structural feature continuous data based on the curve function of each type of structural feature continuous data. If so, the corresponding type of structural feature continuous data is regarded as the first key focus structural feature continuous data, and all sudden change sections and all sudden change sections of the change trend of the corresponding type of structural feature continuous data are determined; otherwise, based on the first-order derivative function of the curve function of the corresponding type of structural feature continuous data, it is judged whether a sudden change trend occurs in each type of structural feature continuous data; if so, the corresponding type of structural feature continuous data is regarded as the second key focus structural feature continuous data, and all sudden change sections of the change trend of the corresponding type of structural feature continuous data are determined; otherwise, the corresponding type of structural feature continuous data is regarded as non-key focus structural feature continuous data;

[0123] A synchronous correlation analysis subunit is used to analyze the synchronous correlation between all class structure feature continuous data;

[0124] The structural characteristic analysis subunit is used to perform linear analysis or nonlinear analysis on the structural characteristics of the large-span open-web arch bridge construction structure to obtain all current response levels of the large-span open-web arch bridge construction structure;

[0125] Among them, the structural data change characteristics of the large-span open-web arch bridge construction structure include the synchronous correlation between all types of structural feature continuous data and all current response levels.

[0126] In this embodiment, each type of structural feature continuous data refers to continuous data corresponding to different types of structural features in the construction structure of a large-span open-web arch bridge, such as displacement feature data, stress feature data, etc. For example, the displacement continuous data of the arch crown and the stress continuous data of the arch foot.

[0127] In this embodiment, the curve function of each type of structural feature continuous data is used to describe the function expression of each type of structural feature continuous data changing with time or other variables. For example, the curve function of displacement data is obtained by taking time as the horizontal coordinate and the dome displacement value as the vertical coordinate.

[0128] In this embodiment, based on the curve function of each type of structural feature continuous data, it is determined whether a sudden change occurs in each type of structural feature continuous data: based on the obtained curve function, it is determined whether the data suddenly changes greatly during its change process, for example, whether there is a sudden steep rise or fall in the curve.

[0129] In this embodiment, all sudden change sections and all sudden change sections of the continuous data of the corresponding structural feature are determined: specific intervals where sudden changes occur in the data and intervals where the change trend changes significantly are found. For example, in the displacement curve, the time period where the displacement suddenly increases or decreases is marked.

[0130] In this embodiment, whether there is a sudden change in the trend of each type of structural feature continuous data is determined based on the first-order derivative of the curve function corresponding to the continuous data of the structural feature class: by analyzing the first-order derivative of the curve function, it is determined whether there is a sudden change in the data change trend. For example, the interval corresponding to the point where the first-order derivative changes from positive to negative or from negative to positive.

[0131] In this embodiment, all the sudden change sections of the change trend of the continuous data of the corresponding class structure feature are determined: the specific intervals where the change trend suddenly changes in the data are identified, for example, the time period where the first-order derivative suddenly changes is found.

[0132] In this embodiment, the synchronization correlation between all types of structural feature continuous data is the correlation and synchronization degree between different types of structural feature continuous data in terms of changes. For example, when the displacement of the arch top increases, the stress of the arch foot also increases, and the changes of the two are synchronous.

[0133] In this embodiment, all current response levels of the long-span open-web arch bridge construction structure refer to the degree to which the structure approaches the limit of its tolerance in terms of buckling analysis, geometric nonlinear analysis, material nonlinear analysis, etc. during the construction of the long-span open-web arch bridge. It reflects that the stress and deformation conditions of the structure in the current construction state are close to the limit.

[0134] For example, if the current response level is 80%, it means that the structure has reached 80% of the limit state in this analysis and needs to be closely monitored and possible action taken.

[0135] The beneficial effects of the above technologies include: the continuous data classification subunit can accurately identify the sections with sudden changes and sudden changes in change trends through detailed analysis of the continuous data of structural characteristics, distinguish between key and non-key data, and improve the pertinence of data analysis. The synchronous correlation analysis subunit analyzes the synchronous correlation between various types of structural characteristic continuous data, which helps to fully understand the changing rules of structural data. The structural characteristic analysis subunit performs linear or nonlinear analysis to obtain the current response level, which provides important parameters for evaluating the stability of the structure. Comprehensively considering the synchronous correlation and the current response level as the characteristics of structural data changes can reflect the changes in the structural state more comprehensively and deeply. It provides strong support for timely detection of abnormal changes in the structure, taking effective control measures, and ensuring the stability of the construction structure. It improves the accuracy and reliability of the analysis of the change characteristics of the construction structure data of large-span hollow arch bridges, which helps to improve the safety and quality of construction.

[0136] Example 8

[0137] Based on Example 7, the synchronization correlation analysis subunit includes:

[0138] The first synchronous correlation analysis terminal is used to analyze the synchronous correlation between all data segments except all sudden change segments and all sudden change trend segments in all first key focus structural feature continuous data and all non-key focus structural feature continuous data;

[0139] The second synchronous correlation analysis terminal is used to analyze the synchronous correlation between all the change trend sudden change sections in all the first key focus structural feature continuous data and all the change trend sudden change sections in all the second key focus structural feature continuous data;

[0140] The third synchronous correlation analysis terminal is used to analyze the synchronous correlation between all the sudden change sections in all the first key focus structural feature continuous data;

[0141] Among them, the synchronous correlation between all class structural feature continuous data includes: the synchronous correlation between all data segments except all sudden change segments and all change trend sudden change segments in all first-focus structural feature continuous data and all non-focus structural feature continuous data, the synchronous correlation between all change trend sudden change segments in all first-focus structural feature continuous data and all change trend sudden change segments in all second-focus structural feature continuous data, and the synchronous correlation between all sudden change segments in all first-focus structural feature continuous data.

[0142] In this embodiment, a data segment refers to a continuous part of the structural feature continuous data in time or other dimensions, such as displacement data within a certain time period or stress data within a certain construction stage.

[0143] In this embodiment, the synchronous correlation between all data segments except all sudden change segments and all sudden change trend segments in all first-focused structural feature continuous data and all non-focused structural feature continuous data is analyzed: the synchronous change relationship between the data segments except the parts with sudden change and sudden change trend in the continuous data of the structural features listed as the first-focused structural features and the continuous data of the structural features that are not focused on is studied. For example, for the key displacement data of the arch, the degree of synchronous change between the data segments except the segments with sudden and large changes and the non-focused arch foot material performance data is studied.

[0144] In this embodiment, the synchronization correlation between all the change trend sudden change sections in all the first key focus structural feature continuous data and all the change trend sudden change sections in all the second key focus structural feature continuous data is analyzed: the synchronization change relationship between the sections in the first key focus structural feature continuous data with sudden change trend and the sections in the second key focus structural feature continuous data with sudden change trend is explored. For example, the synchronization between the part of the change trend suddenly changed in the first key focus arch displacement data and the part of the change trend suddenly changed in the second key focus arch rib stress data.

[0145] In this embodiment, the synchronization correlation between all the sudden change sections in all the first key structural feature continuous data is analyzed: the synchronization change relationship between the sudden change sections in the first key structural feature continuous data is studied. For example, the synchronization between the sudden and significant increase sections and the sudden and significant decrease sections in the first key arch foot stress data.

[0146] The beneficial effects of the above technology include: the first synchronous correlation analysis end can analyze the synchronous correlation between the stable segments in the key focus data and the non-key focus data, and comprehensively consider the relationship between the data. The second synchronous correlation analysis end focuses on the correlation between the segments with sudden changes in the change trend in the key focus data, which helps to capture the association of key changes. The third synchronous correlation analysis end analyzes the synchronous correlation between the sudden change segments and can timely discover the internal connection of extreme changes. By analyzing the synchronous correlation of different types of data segments separately, the complex relationship between the continuous data of structural features is revealed more finely. It provides a more detailed and accurate basis for accurately evaluating the changing characteristics of structural data, predicting the changing trend of structural state, and formulating targeted control measures. It improves the comprehensiveness and accuracy of the synchronous correlation analysis of the construction structure data of large-span hollow arch bridges, and enhances the ability to monitor and control construction stability.

[0147] Example 9

[0148] On the basis of Example 7, the structural feature analysis subunit comprises:

[0149] The buckling analysis end is used to generate a finite element model of the large-span hollow arch bridge construction safety structure when it is determined based on the structural characteristics of the large-span hollow arch bridge construction structure that the large-span hollow arch bridge construction structure has not undergone a large structural deformation and the material has not entered a nonlinear stage, and obtain a linear buckling analysis result based on the finite element model of the large-span hollow arch bridge construction safety structure, and calculate the current buckling analysis response degree of the large-span hollow arch bridge construction structure based on the structural characteristics of the large-span hollow arch bridge construction structure and the linear buckling analysis result;

[0150] The geometric nonlinear analysis end is used to solve the geometric nonlinear equilibrium equation of the safety structure of the large-span hollow arch bridge construction when it is determined that the large-span hollow arch bridge construction structure has a large structural deformation based on the structural characteristics of the large-span hollow arch bridge construction structure, and calculate the current geometric nonlinear analysis response degree of the large-span hollow arch bridge construction structure based on the structural characteristics and geometric nonlinear equilibrium equation of the large-span hollow arch bridge construction structure;

[0151] The material nonlinear analysis end is used to analyze the nonlinear behavior analysis response degree of each material in the finite element model of the large-span hollow arch bridge construction safety structure based on the constitutive relationship of all materials when it is determined that the material of the large-span hollow arch bridge construction structure enters the nonlinear stage based on the structural characteristics of the large-span hollow arch bridge construction structure;

[0152] Among them, all current response levels of the long-span open-web arch bridge construction structure include the current buckling analysis response level or the current geometric nonlinear analysis response level or / and the nonlinear behavior analysis response level of the long-span open-web arch bridge construction structure.

[0153] In this embodiment, based on the structural characteristics of the large-span hollow arch bridge construction structure, it is judged that the large-span hollow arch bridge construction structure has not undergone large structural deformation or the material has not entered the nonlinear stage: according to the structural characteristics such as shape, size, material properties, etc. presented by the large-span hollow arch bridge construction structure during the construction process, it is determined whether it has not undergone obvious large structural deformation and whether the used materials have not yet reached the nonlinear mechanical behavior stage. For example, the above judgment is made by monitoring that the deformation of the arch does not exceed the set threshold and the stress-strain curve of the material is still in the linear stage.

[0154] In this embodiment, the safety structure of the long-span hollow arch bridge construction is an ideal structural state considered during the construction process to ensure the safety and stability of the long-span hollow arch bridge. For example, it is assumed that there is no defect or adverse factor affecting the long-span hollow arch bridge structure.

[0155] In this embodiment, a finite element model of a large-span open-web arch bridge construction safety structure is generated: the finite element analysis method is used to convert the large-span open-web arch bridge construction safety structure into a mathematical model for numerical calculation and analysis. For example, each component of the bridge is divided into finite element grids and given corresponding material properties and boundary conditions.

[0156] In this embodiment, the linear buckling analysis results are obtained based on the finite element model of the safety structure of the large-span open-web arch bridge construction: the linear buckling analysis of the structure is performed using the established finite element model to obtain the analysis results on the stability of the structure, for example, the critical load value at which the structure may buckle under a specific load is obtained.

[0157] In this embodiment, the current buckling analysis response degree of the long-span hollow arch bridge construction structure is calculated based on the structural characteristics of the long-span hollow arch bridge construction structure and the linear buckling analysis results: combining the characteristics of the long-span hollow arch bridge construction structure in terms of shape, size, material properties, etc., and the results obtained through linear buckling analysis (such as critical buckling load, buckling mode, etc.), a specific algorithm or method is used to determine the degree to which the structure is close to the limit state in terms of buckling at the current construction stage. For example, if the structural characteristics indicate that the arch rib is made of high-strength steel and has a large cross-section, and the linear buckling analysis results show that the critical buckling load is high, the current buckling analysis response degree is calculated to be low, which means that the structure is far from the buckling limit.

[0158] In this embodiment, the current buckling analysis response degree is a quantitative index used to measure the ability of the large-span open-web arch bridge construction structure to resist buckling deformation close to its limit in the current state. The higher the value, the closer it is to the buckling limit; the lower the value, the farther it is from the buckling limit.

[0159] For example, a response level of 0.8 means that the structure is at a high risk of buckling, while 0.2 means it is relatively safe.

[0160] In this embodiment, the geometrically nonlinear equilibrium equation of the safety structure of the large-span hollow arch bridge construction is solved: an equation that can describe the equilibrium relationship of the safety structure of the large-span hollow arch bridge construction under geometrically nonlinear conditions is found by mathematical methods. For example, nonlinear factors such as large deformation and large rotation of the structure are considered to obtain the corresponding equilibrium equation.

[0161] In this embodiment, the current geometric nonlinear analysis response degree of the large-span hollow arch bridge construction structure is calculated based on the structural characteristics and geometric nonlinear equilibrium equation of the large-span hollow arch bridge construction structure: the actual structure, material distribution and other characteristics of the large-span hollow arch bridge construction structure, as well as the equilibrium equation describing the geometric nonlinear phenomenon, are comprehensively considered, and the degree to which the structure in the current construction stage approaches its limit in terms of geometric nonlinear behavior is obtained through the corresponding calculation process. For example, if the structural characteristics show that there is a large deformation area, and the solution result of the geometric nonlinear equilibrium equation shows that the deformation is large, the calculated current geometric nonlinear analysis response degree may be high.

[0162] In this embodiment, the current geometric nonlinear analysis response degree of the large-span open-web arch bridge construction structure reflects the degree to which the stress and deformation characteristics of the structure are close to its geometric nonlinear bearing limit due to nonlinear factors such as large displacement and large rotation of the structure during the construction of the large-span open-web arch bridge. For example, a high response degree may mean that the deformation of the structure is relatively significant and measures need to be taken to control the deformation.

[0163] In this embodiment, the constitutive relations of all materials are the mechanical properties of various materials (such as concrete, steel, etc.) used in the construction of large-span hollow arch bridges under different stress and strain conditions, such as the stress-strain curve of concrete and the yield criterion of steel.

[0164] In this embodiment, the nonlinear behavior analysis response degree of each material in the finite element model of the long-span hollow arch bridge construction safety structure is analyzed based on the constitutive relationship of all materials: according to the constitutive relationship (such as stress-strain curve) of various materials (such as concrete, steel, etc.) under different stress and strain conditions, in the finite element model of the long-span hollow arch bridge construction safety structure, the degree to which the nonlinear mechanical behavior of each material is close to its limit is evaluated. For example, for concrete materials, if its stress is close to the cracking stress, the corresponding nonlinear behavior analysis response degree is high.

[0165] In this embodiment, the nonlinear behavior analysis response degree in the finite element model of the safety structure for the construction of a large-span hollow arch bridge: In the finite element model, for each material used in the safety structure for the construction of a large-span hollow arch bridge, the degree to which its nonlinear mechanical performance (such as plastic deformation, damage accumulation, etc.) is close to its respective limit state is analyzed. For example, if the steel material has obvious yielding phenomenon, its nonlinear behavior analysis response degree is high, indicating that there may be large stress in the local part of the structure.

[0166] The beneficial effects of the above technologies include: the buckling analysis end generates a finite element model for buckling analysis under specific conditions, which can accurately evaluate the stability of the structure under complex conditions. The geometric nonlinear analysis end solves the equilibrium equation for large structural deformations and calculates the current geometric nonlinear analysis response level, which helps to understand the nonlinear behavior of the structure. The material nonlinear analysis end analyzes nonlinear behavior based on the material constitutive relationship, providing a basis for evaluating the impact of materials on structural stability. Comprehensive consideration of aspects such as buckling, geometric nonlinearity and material nonlinearity comprehensively covers factors that may affect structural stability. The current response level obtained includes buckling, geometric nonlinearity and material nonlinearity, providing multi-dimensional parameters for accurately evaluating the stability of the construction structure. It improves the comprehensiveness and accuracy of the stability analysis of the construction structure of large-span hollow arch bridges, and provides strong technical support for ensuring construction safety and structural stability.

[0167] Example 10

[0168] The present invention provides a method for monitoring and controlling the construction stability of a large-span open-web arch bridge, which is applied to the monitoring and controlling system for the construction stability of a large-span open-web arch bridge described in any one of embodiments 1 to 9, with reference to Figure 3 ,include:

[0169] S1: Real-time acquisition of structural data of all key parts currently existing in the construction structure of a large-span open-arch bridge;

[0170] S2: Analyze the structural characteristics, structural data change characteristics and current construction stage of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure;

[0171] S3: Based on the current construction stage, structural characteristics, structural data change characteristics and construction stability evaluation model of the large-span open-arch bridge construction structure, the structural stability index under the current construction state is obtained;

[0172] S4: When it is monitored that the structural stability index is close to the critical value, the corresponding control measures are initiated to obtain the construction stability control results.

[0173] The beneficial effects of the above technology include: through step S1, the structural data of key parts can be obtained in real time to ensure the timeliness and comprehensiveness of the data. Step S2 can deeply analyze the various characteristics and construction stages of the structure to provide detailed information for subsequent evaluation. Step S3 uses the construction stability evaluation model to obtain the structural stability index, making the evaluation more scientific and accurate. Step S4 starts the control measures when the structural stability index approaches the critical value, timely prevents risks, and ensures construction safety. Real-time monitoring and effective control of the construction stability of large-span hollow arch bridges are achieved, improving the safety and reliability of construction.

[0174] 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 equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A large-span open-arch bridge construction stability monitoring and control system, characterized in that: include: The structural data acquisition module is used to obtain the structural data of all key parts currently existing in the construction structure of the long-span open-web arch bridge in real time; The structural data analysis module is used to analyze the first step fine positioning construction stage and structural characteristics and structural data change characteristics of the large-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure, and to perform fine positioning of the second step construction stage on the basis of the first step fine positioning construction stage of the large-span open-web arch bridge construction structure, and obtain the current construction stage of the large-span open-web arch bridge construction structure, including: The first step fine positioning submodule is used to obtain the first step fine positioning construction stage of the large-span open-web arch bridge construction structure based on the construction procedures in the construction plan and the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure; The structural characteristics and change characteristics analysis submodule is used to analyze the structural characteristics and structural data change characteristics of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure, including: A structural characteristic analysis unit is used to analyze the structural characteristics of the long-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the long-span hollow arch bridge construction structure; The change characteristic analysis unit is used to analyze the structural data change characteristics of the long-span hollow arch bridge construction structure based on the structural characteristics of the long-span hollow arch bridge construction structure, including: The continuous data classification subunit is used to generate a curve function of each type of structural feature continuous data in the structural features of the large-span hollow arch bridge construction structure, and judge whether a sudden change occurs in each type of structural feature continuous data based on the curve function of each type of structural feature continuous data. If so, the corresponding type of structural feature continuous data is regarded as the first key focus structural feature continuous data, and all sudden change sections and all sudden change sections of the change trend of the corresponding type of structural feature continuous data are determined; otherwise, based on the first-order derivative function of the curve function of the corresponding type of structural feature continuous data, it is judged whether a sudden change trend occurs in each type of structural feature continuous data; if so, the corresponding type of structural feature continuous data is regarded as the second key focus structural feature continuous data, and all sudden change sections of the change trend of the corresponding type of structural feature continuous data are determined; otherwise, the corresponding type of structural feature continuous data is regarded as non-key focus structural feature continuous data; A synchronous correlation analysis subunit is used to analyze the synchronous correlation between all class structure feature continuous data; The structural characteristic analysis subunit is used to perform linear analysis or nonlinear analysis on the structural characteristics of the large-span open-web arch bridge construction structure to obtain all current response levels of the large-span open-web arch bridge construction structure; Among them, the structural data variation characteristics of the long-span open-web arch bridge construction structure include the synchronous correlation between all continuous data of structural characteristics and all current response levels; The second-step fine positioning submodule is used to perform fine positioning of the second-step construction stage on the basis of the first-step fine positioning construction stage of the large-span open-web arch bridge construction structure based on the structural characteristics and structural data change characteristics of the large-span open-web arch bridge construction structure, and obtain the current construction stage of the large-span open-web arch bridge construction structure; The stability monitoring module is used to input the current construction stage, structural characteristics, and structural data change characteristics of the large-span open-arch bridge construction structure into the construction stability evaluation model to obtain the structural stability index under the current construction state; The stability control module is used to initiate corresponding control measures when it is monitored that the structural stability index is close to the critical value, so as to obtain the construction stability control result.

2. The long-span hollow arch bridge construction stability monitoring and control system according to claim 1 is characterized in that: Structural data acquisition module, including: The data acquisition submodule is used to obtain the displacement, stress and strain data of all key parts currently existing in the construction structure of the long-span open-web arch bridge in real time based on the high-precision sensors installed in all key parts of the long-span open-web arch bridge structure; The data processing submodule is used to clean and fill in the null values ​​of the displacement, stress and strain data of all key parts currently existing in the construction structure of the long-span hollow arch bridge that are continuously acquired, so as to obtain the structural data of all key parts currently existing in the construction structure of the long-span hollow arch bridge.

3. The long-span hollow arch bridge construction stability monitoring and control system according to claim 1 is characterized in that: The first step is to fine-tune the submodules, including: A coarse positioning unit is used to coarsely position the construction stage based on the construction process in the construction plan to obtain the current coarsely positioned construction stage; The first step fine positioning unit is used to perform fine positioning of the first construction stage on the basis of the current rough positioning construction stage based on all key part types contained in the structural data of all key parts currently existing in the large-span open-web arch bridge construction structure and all structural data types of each key part, so as to obtain the first step fine positioning construction stage of the large-span open-web arch bridge construction structure.

4. The long-span open-web arch bridge construction stability monitoring and control system according to claim 1 is characterized in that: Structural feature analysis unit, including: A geometric feature analysis subunit is used to analyze the continuous geometric features of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure; The mechanical characteristics analysis subunit is used to analyze the continuous mechanical characteristics of the large-span hollow arch bridge construction structure based on the structural data of all key parts currently existing in the large-span hollow arch bridge construction structure; The material characteristic analysis subunit is used to analyze the continuous material characteristics of the long-span open-web arch bridge construction structure based on the structural data of all key parts currently existing in the long-span open-web arch bridge construction structure; Among them, the structural characteristics of the large-span hollow arch bridge construction structure include: continuous geometric characteristics, continuous mechanical characteristics, and continuous material characteristics of the large-span hollow arch bridge construction structure.

5. The long-span open-web arch bridge construction stability monitoring and control system according to claim 1 is characterized in that: Synchronous correlation analysis subunit, including: The first synchronous correlation analysis terminal is used to analyze the synchronous correlation between all data segments except all sudden change segments and all sudden change trend segments in all first key focus structural feature continuous data and all non-key focus structural feature continuous data; The second synchronous correlation analysis terminal is used to analyze the synchronous correlation between all the change trend sudden change sections in all the first key focus structural feature continuous data and all the change trend sudden change sections in all the second key focus structural feature continuous data; The third synchronous correlation analysis terminal is used to analyze the synchronous correlation between all the sudden change sections in all the first key focus structural feature continuous data; Among them, the synchronous correlation between all class structural feature continuous data includes: the synchronous correlation between all data segments except all sudden change segments and all change trend sudden change segments in all first-focus structural feature continuous data and all non-focus structural feature continuous data, the synchronous correlation between all change trend sudden change segments in all first-focus structural feature continuous data and all change trend sudden change segments in all second-focus structural feature continuous data, and the synchronous correlation between all sudden change segments in all first-focus structural feature continuous data.

6. The long-span open-web arch bridge construction stability monitoring and control system according to claim 1 is characterized in that: Structural feature analysis subunit, including: The buckling analysis end is used to generate a finite element model of the large-span hollow arch bridge construction safety structure when it is determined based on the structural characteristics of the large-span hollow arch bridge construction structure that the large-span hollow arch bridge construction structure has not undergone a large structural deformation and the material has not entered a nonlinear stage, and obtain a linear buckling analysis result based on the finite element model of the large-span hollow arch bridge construction safety structure, and calculate the current buckling analysis response degree of the large-span hollow arch bridge construction structure based on the structural characteristics of the large-span hollow arch bridge construction structure and the linear buckling analysis result; The geometric nonlinear analysis end is used to solve the geometric nonlinear equilibrium equation of the safety structure of the large-span hollow arch bridge construction when it is determined that the large-span hollow arch bridge construction structure has a large structural deformation based on the structural characteristics of the large-span hollow arch bridge construction structure, and calculate the current geometric nonlinear analysis response degree of the large-span hollow arch bridge construction structure based on the structural characteristics and geometric nonlinear equilibrium equation of the large-span hollow arch bridge construction structure; The material nonlinear analysis end is used to analyze the nonlinear behavior analysis response degree of each material in the finite element model of the large-span hollow arch bridge construction safety structure based on the constitutive relationship of all materials when it is determined that the material of the large-span hollow arch bridge construction structure enters the nonlinear stage based on the structural characteristics of the large-span hollow arch bridge construction structure; Among them, all current response levels of the long-span open-web arch bridge construction structure include the current buckling analysis response level or the current geometric nonlinear analysis response level or / and the nonlinear behavior analysis response level of the long-span open-web arch bridge construction structure.

7. A method for monitoring and controlling the construction stability of a large-span open-web arch bridge, characterized in that: The long-span hollow arch bridge construction stability monitoring and control system applied to any one of claims 1 to 6 comprises: S1: Real-time acquisition of structural data of all key parts currently existing in the construction structure of a large-span open-arch bridge; S2: Based on the structural data of all key parts currently existing in the large-span hollow arch bridge construction structure, the first step fine positioning construction stage and structural characteristics of the large-span hollow arch bridge construction structure and the structural data change characteristics are analyzed, and the second step construction stage fine positioning is performed on the basis of the first step fine positioning construction stage of the large-span hollow arch bridge construction structure to obtain the current construction stage of the large-span hollow arch bridge construction structure; S3: Based on the current construction stage, structural characteristics, structural data change characteristics and construction stability evaluation model of the large-span hollow arch bridge construction structure, the structural stability index under the current construction state is obtained; S4: When it is monitored that the structural stability index is close to the critical value, the corresponding control measures are initiated to obtain the construction stability control results.

Images