Concrete continuous box girder jacking method based on intelligent control

Abstract

The invention relates to the technical field of engineering construction, in particular to a concrete continuous box girder jacking method based on intelligent control. The method comprises the following steps: acquiring a box girder jacking engineering data set, analyzing the box girder jacking engineering data set, and determining jacking key indication data; determining a key jacking node layout strategy based on the box girder jacking engineering data set and the jacking key indication data; according to the key jacking node layout strategy, a box girder jacking engineering data set is analyzed, and a same-proportion asynchronous jacking strategy is determined; and carrying out jacking construction according to the same-proportion asynchronous jacking strategy, obtaining dynamic jacking monitoring data, carrying out dynamic fine adjustment on the jacking construction process according to the dynamic jacking monitoring data, and determining and outputting a jacking construction report. The box girder structure risk caused by additional internal force is effectively reduced, meanwhile, the operation flexibility in the jacking process is guaranteed so as to deal with the uncertainty of actual jacking construction conditions, and the operation error, the equipment error and the personnel cooperation error in the jacking process are reduced.

Description

Technical Field

[0001] This application relates to the technical field of engineering construction, and particularly to a method for jacking up a concrete continuous box girder based on intelligent control. Background Art

[0002] The concrete continuous box girder is a structural form widely used in modern bridge engineering. It has high bearing capacity and good flexural performance, and is suitable for the construction of long-span bridges and complex terrains. With the development of transportation, the initial design standards of some bridges are difficult to meet the changing traffic demands. In order to improve the adaptability of bridges to dynamic traffic demands, the renovation of existing bridges has become an important task. The concrete box girder jacking technology provides an effective solution for the renovation and efficiency improvement of bridges.

[0003] However, the existing concrete box girder jacking technology requires multiple systems to cooperate in jacking. The synchronism during the jacking process is poor, the jacking efficiency is low, and the integration degree and intelligent level during the multi-system cooperative jacking process are low, and the personnel operation intervention is frequent, which significantly increases the operation error, equipment error and personnel cooperation error during the jacking process, and it is difficult to quickly and accurately control the total error amount, resulting in low efficiency and high safety risks in the bridge renovation project. Summary of the Invention

[0004] This application provides a method for jacking up a concrete continuous box girder based on intelligent control to solve the above technical problems.

[0005] In a first aspect, this application provides a method for jacking up a concrete continuous box girder based on intelligent control, and the method includes:

[0006] Obtain the box girder jacking engineering data set, analyze the box girder jacking engineering data set, and determine the key jacking indication data;

[0007] Based on the box girder jacking engineering data set and the key jacking indication data, determine the key jacking node layout strategy;

[0008] According to the key jacking node layout strategy, analyze the box girder jacking engineering data set, and determine the same-ratio asynchronous jacking strategy;

[0009] According to the same-ratio asynchronous jacking strategy, carry out jacking construction, obtain dynamic jacking monitoring data, dynamically fine-tune the jacking construction process according to the dynamic jacking monitoring data, and determine and output the jacking construction report.

[0010] Through this solution, analyze the box girder jacking project dataset to obtain the key jacking indication data, and based on this analysis, obtain the layout strategy of key jacking nodes, so that the layout strategy of key jacking nodes can be specifically adapted to concrete box girders of different structures, providing good construction framework data support for the jacking construction process. Further, according to the layout strategy of key jacking nodes, analyze the box girder jacking project dataset, construct a proportional asynchronous jacking strategy, carry out jacking construction according to the proportional asynchronous jacking strategy, and according to the dynamic jacking monitoring data, dynamically monitor and fine-tune the jacking construction process. Finally, provide the corresponding jacking construction report to the user, effectively reducing the structural risk of the box girder caused by additional internal forces, while ensuring the flexibility of the operation during the jacking process to cope with the uncertainty of the actual jacking construction conditions, and reducing the operation error, equipment error and personnel coordination error during the jacking process.

[0011] Optionally, the box girder jacking project dataset includes the box girder geometric data model and the box girder material density. Analyzing the box girder jacking project dataset to determine the key jacking indication data includes:

[0012] Analyze the box girder geometric data model to determine the geometric centroid axis, the overall span of the box girder, and the cross-sectional area of the box girder;

[0013] According to the box girder geometric data model, divide the axis position points of the box girder geometric centroid axis to determine the axis position variable set;

[0014] According to the box girder geometric data model, analyze the axis position variable set to determine the vertical load angle, longitudinal load angle, and transverse load angle corresponding to each axis position variable;

[0015] Based on the axis position variable set, according to the overall span of the box girder, the cross-sectional area of the box girder, and the box girder material density, determine the overall bending moment correction vector and the overall shear force correction vector, and according to the vertical load angle, the longitudinal load angle, and the transverse load angle, determine the vertical bending moment correction vector, the longitudinal bending moment correction vector, and the transverse shear force correction vector;

[0016] According to the vertical bending moment correction vector, the longitudinal bending moment correction vector, and the transverse shear force correction vector, determine the three-dimensional correction vector and the plane correction vector;

[0017] Based on the box girder geometric centroid axis, according to the overall bending moment correction vector, the overall shear force correction vector, the three-dimensional correction vector, and the plane correction vector, determine the jacking indication axis;

[0018] Determine the jacking indication axis as the key jacking indication data.

[0019] Through this solution, based on the geometric data model of the box girder, the geometric centroid axis, the overall span of the box girder, and the cross-sectional area of the box girder are determined. The geometric centroid axis of the box girder is divided into axis position points to obtain an axis position variable set. Further analysis yields the vertical load angle, longitudinal load angle, and lateral load angle corresponding to each axis position variable. On this basis, according to the quantitatively obtained overall moment correction vector, overall shear correction vector, three-dimensional correction vector, and plane correction vector, the geometric centroid axis of the box girder is adjusted to obtain a jacking indication axis that can reflect the actual internal force distribution law of the box girder, and this is used as the key jacking indication data, so that the key jacking node layout strategy obtained subsequently based on the key jacking indication data can be highly matched with the internal force state of the box girder, improving the safety and stability of the jacking construction process.

[0020] Optionally, based on the geometric centroid axis of the box girder, according to the overall moment correction vector, the overall shear correction vector, the three-dimensional correction vector, and the plane correction vector, the determination of the jacking indication axis is specifically the following formula:

[0021]

[0022] Among them, r u (s) is the jacking indication axis, r(s) is the geometric centroid axis of the box girder, Δr p (s) is the three-dimensional correction vector, Δr c (s) is the plane correction vector, s is the axis position variable, Δr(s) is the displacement adjustment amount, L is the overall span of the box girder, M(s) is the overall moment correction vector, and Q(s) is the overall shear correction vector.

[0023] Through this solution, by using mathematical analysis means, based on the geometric centroid axis of the box girder, according to the overall moment correction vector, the overall shear correction vector, the three-dimensional correction vector, and the plane correction vector, the jacking indication axis is analyzed, so that the internal force distribution during the jacking of the box girder is optimized, reducing the overall effect and peak values of the moment and shear force, in order to reduce the negative impact of the overall moment and shear force on the subsequent jacking construction process.

[0024] Optionally, according to the vertical moment correction vector, the longitudinal moment correction vector, and the lateral shear correction vector, the determination of the three-dimensional correction vector and the plane correction vector is specifically the following formula:

[0025]

[0026] Among them, Δr p (s) is the three-dimensional correction vector, Δr c (s) is the plane correction vector, δz is the vertical adjustment amount, M z(s) is the vertical moment correction vector, L is the overall span of the box girder, Δx,y is the plane adjustment amount, M y (s) is the longitudinal moment correction vector, Q x (s) is the transverse shear correction vector.

[0027] Through this solution, by means of mathematical analysis, according to the vertical moment correction vector, the longitudinal moment correction vector and the transverse shear correction vector, through the integral minimization algorithm, the three-dimensional correction vector and the plane correction vector are quantitatively obtained, reducing the concentrated load and the vertical reaction force within the span of the box girder, while optimizing the force balance in the plane of the box girder and the deflection uniformity in the front and rear directions, so that the subsequent jacking node layout strategy based on the jacking indication axis can further ensure the stability and safety of the jacking process.

[0028] Optionally, based on the set of axis position variables, according to the overall span of the box girder, the cross-sectional area of the box girder and the material density of the box girder, the overall moment correction vector and the overall shear correction vector are determined, and according to the vertical load angle, the longitudinal load angle and the transverse load angle, the vertical moment correction vector, the longitudinal moment correction vector and the transverse shear correction vector are determined, specifically as the following formulas:

[0029]

[0030] Among them, M(s) is the overall moment correction vector, Q(s) is the overall shear correction vector, M z (s) is the vertical moment correction vector, M y (s) is the longitudinal moment correction vector, Q x (s) is the transverse shear correction vector, ρ is the material density of the box girder, A is the cross-sectional area of the box girder, g is the acceleration due to gravity, L is the overall span of the box girder, s is the axis position variable, θ is the vertical load angle, γ is the longitudinal load angle, ψ is the transverse load angle.

[0031] Through this solution, by means of mathematical analysis, based on the set of axis position variables, according to the overall span of the box girder, the cross-sectional area of the box girder and the material density of the box girder, the overall moment correction vector and the overall shear correction vector are quantitatively analyzed respectively, and combined with the vertical load angle, the longitudinal load angle and the transverse load angle, the vertical moment correction vector, the longitudinal moment correction vector and the transverse shear correction vector are quantitatively obtained, accurately describing the influence of moments and shears in different directions, thereby improving the scientificity and accuracy of the above series of correction vectors, and further improving the accuracy of the jacking indication axis.

[0032] Optionally, the box girder jacking project dataset further includes a capping beam geometric model. Based on the box girder jacking project dataset and the key jacking indication data, determining the key jacking node layout strategy includes:

[0033] Determine the bottom width of the box girder according to the box girder geometric data model;

[0034] Determine the number of jacking nodes within a unit group according to the bottom width of the box girder;

[0035] Based on the preset axis centripetal support node spacing decreasing layout strategy, determine the in-group jacking node spacing dataset according to the number of jacking nodes within a unit group;

[0036] Based on the number of jacking nodes within a unit group and the in-group jacking node spacing dataset, determine several key jacking node layout axes corresponding to the number of jacking nodes within a unit group that are parallel to the jacking indication axis and meet the corresponding spacing requirements within the in-group jacking node spacing dataset according to the jacking indication axis;

[0037] Determine the number of jacking node groups and the jacking node group spacing according to the overall span of the box girder;

[0038] Construct the key jacking node layout strategy according to the number of jacking node groups, the jacking node group spacing, the number of jacking nodes within a unit group, the in-group jacking node spacing dataset, and several key jacking node layout axes.

[0039] Through this solution, based on the jacking indication axis, the bottom width of the box girder, the overall span of the box girder, and the preset axis centripetal support node spacing decreasing layout strategy, analyze and obtain the number of jacking nodes within a unit group, the in-group jacking node spacing dataset, several key jacking node layout axes, the number of jacking node groups, and the jacking node group spacing respectively, and construct the key jacking node layout strategy with this, so that the key jacking node layout strategy can map the specific positions of all jacking nodes at the bottom of the box girder, and ensure the scientificity of the jacking node layout position to improve the stability of the jacking process.

[0040] Optionally, the box girder jacking project dataset includes the target slope of the box girder. According to the key jacking node layout strategy, analyze the box girder jacking project dataset to determine the same-proportion asynchronous jacking strategy, including:

[0041] Analyze the box girder geometric data model to determine the initial slope of the box girder;

[0042] Based on the jacking node group spacing, the in-group jacking node spacing dataset, and several key jacking node layout axes, analyze the box girder geometric data model to determine the initial three-dimensional coordinates and corresponding initial elevations of each jacking node;

[0043] Based on the initial slope of the box girder, the target slope of the box girder, and a preset compensation constant, and according to the initial three-dimensional coordinates and the initial elevation of each jacking node, determine the total compensated jacking stroke of each jacking node;

[0044] Based on the total compensated jacking stroke of each jacking node, according to the preset number of jacking operations, proportionally divide the total compensated jacking stroke corresponding to each jacking node to determine the proportional jacking time-sequence stroke data set corresponding to each jacking node;

[0045] According to the total compensated jacking stroke and the proportional jacking time-sequence stroke data set corresponding to each jacking node, construct the proportional asynchronous jacking strategy.

[0046] Through this solution, based on the geometric data model of the box girder, according to the key jacking node layout strategy, respectively determine the initial slope of the box girder and the initial three-dimensional coordinates and corresponding initial elevations of each jacking node, combine with the target slope of the box girder, analyze and obtain the total compensated jacking stroke of each jacking node, and based on the preset number of jacking operations, proportionally divide the total compensated jacking stroke corresponding to each jacking node to obtain the proportional jacking time-sequence stroke data set, and according to the total compensated jacking stroke and the proportional jacking time-sequence stroke data set corresponding to each jacking node, construct the proportional asynchronous jacking strategy, so that the proportional asynchronous jacking strategy can clarify the jacking target of each jacking node while characterizing the jacking stroke required for each jacking node at different time points in the asynchronous state, improving the jacking construction efficiency and accuracy.

[0047] Optionally, the determining the total compensated jacking stroke of each jacking node based on the initial slope of the box girder, the target slope of the box girder, and a preset compensation constant, and according to the initial three-dimensional coordinates and the initial elevation of each jacking node is specifically the following formula:

[0048]

[0049] wherein, ΔH i，j is the total jacking stroke of the j-th jacking node in the i-th jacking node group, Z i，j is the initial vertical coordinate of the j-th jacking node in the i-th jacking node group, α t is the target slope, α o is the initial slope, C is the compensation reference value, H i，j，o is the initial elevation of the j-th jacking node in the i-th jacking node group, and S is the preset compensation constant.

[0050] Through this solution, by means of mathematical analysis, based on the initial slope of the box girder, the target slope of the box girder and a preset compensation constant, according to the initial three-dimensional coordinates and initial elevation of each jacking node, the jacking stroke of each jacking node is uniformly compensated, and the total compensated jacking stroke corresponding to each jacking node is quantitatively obtained. While eliminating all negative strokes, the jacking strokes of all jacking nodes are uniformly adjusted to improve the stability of the jacking project.

[0051] Optionally, the dynamic jacking monitoring data includes displacement monitoring data, pressure monitoring data, and stress monitoring data. According to the same-ratio asynchronous jacking strategy, jacking construction is carried out, and dynamic jacking monitoring data is obtained. According to the dynamic jacking monitoring data, dynamic fine-tuning is performed on the jacking construction process, and a jacking construction report is determined and output, including:

[0052] According to the same-ratio jacking time-sequence stroke data set corresponding to each jacking node, control each jacking node to perform jacking construction with the corresponding jacking stroke on the box girder at the corresponding time point;

[0053] According to the displacement monitoring data, the pressure monitoring data, and the stress monitoring data, dynamically evaluate the jacking safety risk;

[0054] Compare the jacking safety risk with a preset safety risk threshold. If the jacking safety risk exceeds the preset safety risk threshold, uniformly control all jacking nodes to stop working, record the current states of all jacking nodes, and output abnormal risk data;

[0055] When the jacking safety risk drops below the preset safety risk threshold, control all jacking nodes to resume working, and after the jacking construction is completed, according to the dynamic jacking monitoring data, construct and output the jacking construction report.

[0056] Through this solution, according to the displacement monitoring data, the pressure monitoring data, and the stress monitoring data in the dynamic jacking monitoring data, dynamically track and evaluate the jacking safety risk during the construction process. When the jacking safety risk exceeds the preset safety risk threshold, timely interrupt the jacking operation. After the jacking safety risk is effectively reduced, resume the jacking operation, and according to the dynamic jacking monitoring data, construct and output the jacking construction report, further ensuring the safety of the jacking construction process and reducing the probability of safety accidents.

[0057] Optionally, the dynamically evaluating the jacking safety risk according to the displacement monitoring data, the pressure monitoring data, and the stress monitoring data is specifically the following formula:

[0058]

[0059] Among them, R is the jacking safety risk, D is the current displacement value, Dc is the displacement error threshold, ∈ is the preset protection parameter, P is the current pressure value, P t is the ideal working pressure value, P c is the pressure critical value, S is the current stress value, S y is the yield stress, k S is the preset adjustment parameter.

[0060] Through this solution, by using mathematical analysis means, based on the displacement monitoring data, pressure monitoring data and stress monitoring data, the influence relationships between the main risk sources and the jacking safety risks during the three types of jacking processes of displacement, pressure and stress are respectively clarified, so as to quantitatively obtain the jacking safety risks and improve the scientificity and accuracy of the jacking safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0062] Figure 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0063] Figure 2 is a flowchart of a method for jacking a concrete continuous box girder based on intelligent control provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0064] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0065] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after unless otherwise specified.

[0066] The following will further describe the embodiments of the present application in detail with reference to the drawings of the specification.

[0067] The existing concrete box girder jacking technology requires multiple systems to cooperate in jacking. The synchronism during the jacking process is poor, the jacking efficiency is low, and the integration degree during the multi-system cooperative jacking process is low, the degree of intelligence is insufficient, and the personnel operation intervention is frequent, which significantly increases the operation error, equipment error and personnel cooperation error during the jacking process, making it difficult to quickly and accurately control the total error amount, resulting in low efficiency and high safety risk in the bridge reconstruction project.

[0068] Based on this, the present application provides a concrete continuous box girder jacking method based on intelligent control. Analyze the box girder jacking engineering data set to obtain key jacking indication data, and based on this analysis, obtain the key jacking node layout strategy, so that the key jacking node layout strategy can be specifically adapted to concrete box girders of different structures, providing good construction framework data support for the jacking construction process. Further, according to the key jacking node layout strategy, analyze the box girder jacking engineering data set, construct a proportional asynchronous jacking strategy, carry out jacking construction according to the proportional asynchronous jacking strategy, and dynamically monitor and fine-tune the jacking construction process according to the dynamic jacking monitoring data, and finally provide the corresponding jacking construction report to the user, effectively reducing the box girder structure risk brought by additional internal forces, while ensuring the flexibility of the operation during the jacking process to cope with the uncertainty of the actual jacking construction conditions, and reducing the operation error, equipment error and personnel cooperation error during the jacking process.

[0069] Figure 1 This is a schematic diagram of an application scenario provided by the present application. During the box girder jacking process, the method provided by the present application is applied to effectively reduce the operation error, equipment error and personnel cooperation error during the jacking process.

[0070] Specifically, the method of the present application is carried on any server, and the server communicates with the engineering parameter sensor. Obtain and analyze the box girder jacking engineering data set provided by the user through the server to obtain key jacking indication data, and based on this analysis, obtain the key jacking node layout strategy, so that the key jacking node layout strategy can be specifically adapted to concrete box girders of different structures and forms, providing good construction framework data support for the jacking construction process. Further, according to the key jacking node layout strategy, analyze the box girder jacking engineering data set, construct a proportional asynchronous jacking strategy, carry out jacking construction according to the proportional asynchronous jacking strategy, and dynamically monitor and fine-tune the jacking construction process according to the dynamic jacking monitoring data provided by the engineering parameter sensor, and finally provide the corresponding jacking construction report to the user, effectively reducing the box girder structure risk brought by additional internal forces, while ensuring the flexibility of the operation during the jacking process to cope with the uncertainty of the actual jacking construction conditions, and reducing the operation error, equipment error and personnel cooperation error during the jacking process.

[0071] The specific implementation manner can refer to the following embodiments.

[0072] Figure 2 The flowchart of a method for jacking up a concrete continuous box girder based on intelligent control provided by an embodiment of the present application. The method of this embodiment can be applied to the server in the above scenarios. As Figure 2 shown, the method includes:

[0073] S201. Obtain the box girder jacking project data set, analyze the box girder jacking project data set, and determine the key jacking indication data.

[0074] The box girder jacking project data set can be a set of relevant parameters required for the box girder jacking project, such as box girder geometric data, etc. The box girder jacking project data set can be provided by the user.

[0075] The key jacking indication data can be the core data that needs to be focused on during the layout process of the box girder jacking equipment, such as the jacking indication axis, etc.

[0076] Specifically, a large amount of preparatory work is required for the box girder jacking project to ensure the accurate implementation of the jacking project. The overall construction framework of the box girder jacking project is directly affected by the concrete box girder structure. For example, there are huge differences between the jacking preparations for the box girder corresponding to the straight section and the jacking preparations for the box girder corresponding to the curved section. The box girder jacking project data set provides a large amount of information about the structural characteristics of the concrete box girder. Through mathematical analysis means, the box girder jacking project data set is automatically analyzed to quantitatively obtain the key jacking indication data that plays a key guiding role in the jacking preparation work, providing scientific data support for the targeted layout of the subsequent jacking equipment.

[0077] S202. Based on the box girder jacking project data set and the key jacking indication data, determine the key jacking node layout strategy.

[0078] The key jacking node layout strategy can be the strategy information used to represent the layout positions and quantities of different jacking equipment.

[0079] Specifically, the position where the jacking equipment is located is the core position where the force is applied during the box girder jacking process and an important connection point for force transmission. If the position where the jacking equipment is located is unreasonable, it is difficult to efficiently and evenly transmit the jacking force to the key stress parts of the box girder during the jacking process, which has a negative impact on the stability and safety of the entire jacking construction process. Based on the key jacking indication data obtained through the mathematical analysis process in the foregoing embodiment, combined with the box girder structure characteristics reflected in the box girder jacking project data set, a scientific key jacking node layout strategy is analyzed to provide good construction framework data support for the jacking construction process.

[0080] S203. According to the key jacking node layout strategy, analyze the box girder jacking project data set and determine the synchronous asynchronous jacking strategy in the same proportion.

[0081] The same - ratio asynchronous jacking strategy can be the strategy information used to control the same - ratio jacking of the box girder height at different jacking nodes in an asynchronous situation.

[0082] Specifically, a concrete box girder is a continuous structure with small flexible deformation and high stress sensitivity. Even a very small uneven force may cause the imbalance of the stress state of the cross - section, and then lead to cracks, local failures or deformations. During the jacking process, the bottom of the box girder is subjected to the reaction force supported by the jacking equipment (such as a jack). If the jacks jack at different ratios, it will cause the formation of local high - stress areas in the box girder (especially in bridges with large spans), which may cause fractures or collapses. The same - ratio jacking can ensure the overall uniform elevation of the box girder, avoid the introduction of additional internal forces, and effectively protect the concrete structure.

[0083] At the same time, in actual working conditions, the box girder may have a large span and the jacking nodes are widely distributed. It is difficult to ensure the complete synchronization of all jacking nodes during the jacking process. Moreover, a completely synchronous jacking strategy will quickly amplify the errors caused by various factors during the jacking process, and even cause asymmetric strong actions, which is not conducive to the stability of the jacking construction. By adopting the asynchronous jacking strategy of gradually lifting in different areas, the dependence on a complex synchronous system can be reduced. And the asynchronous jacking method allows real - time monitoring and adjustment after each single - group jacking, ensuring that each step of the operation conforms to the key points of the jacking engineering design.

[0084] In summary, through mathematical analysis methods, a comprehensive analysis is carried out on the key jacking node layout strategy and the box girder jacking engineering data set to obtain the specific same - ratio jacking strokes required for different jacking nodes at different time points under the current jacking requirements and the corresponding key jacking node layout strategy. A same - ratio asynchronous jacking strategy is constructed, which effectively reduces the structural risk of the box girder brought by additional internal forces, and at the same time ensures the flexibility of the operation during the jacking process to cope with the uncertainty of the actual jacking construction conditions.

[0085] S204. According to the same - ratio asynchronous jacking strategy, carry out jacking construction, obtain dynamic jacking monitoring data, and dynamically fine - tune the jacking construction process according to the dynamic jacking monitoring data, and determine and output a jacking construction report.

[0086] The dynamic jacking monitoring data can be the monitoring data collected during the jacking construction according to the same - ratio asynchronous jacking strategy, which is used to characterize the state of the jacking equipment and the box girder. The dynamic jacking monitoring data can be obtained through different types of engineering parameter sensors, such as displacement sensors, pressure sensors, strain sensors, etc.

[0087] The jacking construction report can be the comprehensive report information used to describe the states of each stage of the jacking project.

[0088] Specifically, based on the key jacking node layout strategy, through a unified PLC control system, the jacking equipment corresponding to different jacking nodes is controlled. According to the jacking stroke at different time points in the key jacking node layout strategy, the concrete box girder is jacked up. During this process, the corresponding dynamic jacking monitoring data is tracked and collected, and through mathematical analysis methods, based on the dynamic jacking monitoring data, the safety risks of the jacking construction are quantitatively analyzed. Based on this, the jacking construction process is dynamically fine-tuned to improve the safety and stability of the jacking construction, and the corresponding jacking construction report is provided to the user for data review and archiving.

[0089] Through this solution, the box girder jacking engineering data set is analyzed to obtain the key jacking indication data, and based on this analysis, the key jacking node layout strategy is obtained, enabling the key jacking node layout strategy to specifically adapt to concrete box girders of different structures, providing good construction framework data support for the jacking construction process. Further, based on the key jacking node layout strategy, the box girder jacking engineering data set is analyzed to construct a proportional asynchronous jacking strategy. According to the proportional asynchronous jacking strategy, the jacking construction is carried out, and based on the dynamic jacking monitoring data, the jacking construction process is dynamically monitored and fine-tuned. Finally, the corresponding jacking construction report is provided to the user, effectively reducing the box girder structure risk brought by additional internal forces, and at the same time ensuring the flexibility of the operation during the jacking process to cope with the uncertainty of the actual jacking construction conditions, reducing operation errors, equipment errors and personnel coordination errors during the jacking process.

[0090] In some embodiments, the box girder geometric data model is analyzed to determine the geometric centroid axis of the box girder, the overall span of the box girder and the cross-sectional area of the box girder; according to the box girder geometric data model, the axis position points of the geometric centroid axis of the box girder are divided to determine the axis position variable set; according to the box girder geometric data model, the axis position variable set is analyzed to determine the vertical load angle, longitudinal load angle and transverse load angle corresponding to each axis position variable; based on the axis position variable set, according to the overall span of the box girder, the cross-sectional area of the box girder and the material density of the box girder, the overall bending moment correction vector and the overall shear force correction vector are determined, and according to the vertical load angle, longitudinal load angle and transverse load angle, the vertical bending moment correction vector, longitudinal bending moment correction vector and transverse shear force correction vector are determined; according to the vertical bending moment correction vector, longitudinal bending moment correction vector and transverse shear force correction vector, the three-dimensional correction vector and the plane correction vector are determined. Based on the geometric centroid axis of the box girder, according to the overall bending moment correction vector, overall shear force correction vector, three-dimensional correction vector and plane correction vector, the jacking indication axis is determined; the jacking indication axis is determined as the key jacking indication data.

[0091] The box girder jacking engineering data set includes the box girder geometric data model and the box girder material density.

[0092] The geometric data model of the box girder can be a three-dimensional data model constructed based on the measured data of the box girder and used to characterize the geometric structure of the box girder;

[0093] The material density of the box girder can be the material density of the materials that make up the box girder.

[0094] The geometric centroid axis of the box girder can be the axis where the gravity of the box girder acts centrally.

[0095] The overall span of the box girder can be the distance between the two ends of the box girder.

[0096] The cross-sectional area of the box girder can be the geometric cross-sectional area of the box girder in a plane perpendicular to the longitudinal axis.

[0097] The set of axis position variables can be the set of positions corresponding to each axis point divided on the geometric central axis.

[0098] The vertical load included angle can be the included angle between the load direction and the geometric centroid axis in the vertical direction, usually affected by the longitudinal slope or the curve shape of the box girder.

[0099] The longitudinal load included angle can be the included angle between the load direction and the longitudinal axis of the box girder (along the span direction), such as the centrifugal load on the curved section of the bridge.

[0100] The lateral load included angle can be the included angle between the load direction and the lateral axis of the box girder (perpendicular to the span direction).

[0101] The overall bending moment correction vector can be a distribution vector used to describe the adjusted bending moment at all positions within the overall range of the box girder.

[0102] The overall shear force correction vector can be a distribution vector describing the adjusted shear force at all positions within the overall range of the box girder.

[0103] The vertical bending moment correction vector can be a vector describing the bending moment distribution value adjusted due to the vertical load included angle.

[0104] The longitudinal bending moment correction vector can be a vector describing the change value of the bending moment adjusted due to the longitudinal load included angle.

[0105] The lateral shear force correction vector can be a vector describing the change value of the shear force adjusted due to the lateral load included angle.

[0106] The three-dimensional correction vector can be a vector describing the total internal force correction value of the box girder in three-dimensional space.

[0107] The plane correction vector can be a vector describing the internal force correction value distributed within the plane of the box girder (such as the bottom plane of the box girder).

[0108] The jacking indication axis can be an axis that provides a reference for the layout of the box girder jacking equipment, taking into account the distribution characteristics of the actual internal force and the corrected internal force of the box girder.

[0109] Specifically, since the key indication data is used to indicate the layout of subsequent jacking nodes, during the analysis of the key indication data, it is necessary to analyze the structural mechanics and load distribution of the box girder. Among them, the geometric centroid axis of the box girder reflects the stress characteristics of the box girder and is the basis for load distribution analysis. However, since the box girder is not an ideal regular geometric structure and there may be slopes and bends, its geometric centroid axis cannot reflect the actual internal force distribution law of the box girder. Therefore, the geometric centroid axis of the box girder cannot be directly used as the basis for the layout of jacking nodes and needs to be corrected on this basis; the overall span of the box girder is a necessary parameter to judge whether the box girder structure meets the bearing requirements and construction feasibility; the cross-sectional area is related to the bending resistance, shear resistance and bearing capacity of the box girder; according to the geometric data model of the box girder, through the centroid calculation algorithm, the centroid axis of the set is solved, and the horizontal distance between the two end supports of the box girder is used as the overall span of the box girder. At the same time, through the geometric area splitting and calculation algorithm, the cross-sectional area of the box girder is obtained; after determining the geometric centroid axis of the box girder, taking the starting point and the ending point of the geometric centroid axis of the box girder as the boundaries, according to the preset division interval (which can be set according to the axis length), several axis position variables are divided on the geometric centroid axis of the box girder to construct an axis position variable set for subsequent discrete mathematical analysis; on this basis, the geometric data model of the box girder is analyzed to determine the angles and directions of the local axes corresponding to different axis position variables, and then according to the angles between the local axis directions and the vertical gravity direction, the longitudinal axis and the transverse axis respectively, the vertical load angle, the longitudinal load angle and the transverse load angle are obtained. There is a mapping relationship between these three angle data and the internal forces from different directions affecting the local axis.

[0110] Through mathematical analysis methods, based on the axis position variable set, according to the overall span of the box girder, the cross-sectional area of the box girder and the material density of the box girder, the total bending moment correction vector and the total shear force correction vector are quantified. These two vector data reflect the total distribution vector for adjusting the geometric centroid axis of the box girder under the influence of its geometric characteristics and material characteristics; at the same time, through mathematical analysis methods, according to the vertical load angle, the longitudinal load angle and the transverse load angle, the vertical bending moment correction vector, the longitudinal bending moment correction vector and the transverse shear force correction vector are quantified. These three vector data reflect the distribution vectors required for adjusting the local centroid axis under the influence of internal forces in different directions. By integrating the above vector data, the three-dimensional correction vector and the plane correction vector are determined; according to the total bending moment correction vector, the total shear force correction vector, the three-dimensional correction vector and the plane correction vector, the geometric centroid axis of the box girder is adjusted to obtain the jacking indication axis that can reflect the actual internal force distribution law of the box girder, and this is used as the key indication data for jacking.

[0111] Through this solution, based on the geometric data model of the box girder, the geometric centroid axis, the overall span of the box girder, and the cross-sectional area of the box girder are determined. The geometric centroid axis of the box girder is divided into axis position points to obtain an axis position variable set. Further analysis yields the vertical load angle, longitudinal load angle, and transverse load angle corresponding to each axis position variable. On this basis, according to the overall bending moment correction vector, overall shear force correction vector, three-dimensional correction vector, and plane correction vector obtained through quantification, the geometric centroid axis of the box girder is adjusted to obtain a jacking indication axis that can reflect the actual internal force distribution law of the box girder, and this is used as the key jacking indication data, enabling the key jacking node layout strategy obtained subsequently based on the key jacking indication data to be highly matched with the internal force state of the box girder, improving the safety and stability of the jacking construction process.

[0112] In some embodiments, based on the geometric centroid axis of the box girder, according to the overall bending moment correction vector, overall shear force correction vector, three-dimensional correction vector, and plane correction vector, the jacking indication axis is determined, specifically by the following formula (1):

[0113]

[0114] Where r u (s) is the jacking indication axis, r(s) is the geometric centroid axis of the box girder, Δr p (s) is the three-dimensional correction vector, Δr c (s) is the plane correction vector, s is the axis position variable, Δr(s) is the displacement adjustment amount, L is the overall span of the box girder, M(s) is the overall bending moment correction vector, and Q(s) is the overall shear force correction vector.

[0115] Specifically, through formula (1), based on the geometric centroid axis of the box girder, the three-dimensional correction vector, and the plane correction vector, by using Within the span of the box girder, the absolute values of all bending moments and shear forces are continuously integrated and minimized to reduce the negative impact of the overall bending moment and shear force on the subsequent jacking construction process, and then the jacking indication axis is obtained, optimizing the internal force distribution of the box girder during the jacking process and reducing the overall effect and peak values of the bending moment and shear force.

[0116] Through this solution, by using mathematical analysis means, based on the geometric centroid axis of the box girder, according to the overall bending moment correction vector, overall shear force correction vector, three-dimensional correction vector, and plane correction vector, the jacking indication axis is analyzed to optimize the internal force distribution of the box girder during the jacking process, reduce the overall effect and peak values of the bending moment and shear force, and reduce the negative impact of the overall bending moment and shear force on the subsequent jacking construction process.

[0117] In some embodiments, a three-dimensional correction vector and a planar correction vector are determined based on a vertical bending moment correction vector, a longitudinal bending moment correction vector, and a transverse shear correction vector, specifically according to the following formula (2):

[0118]

[0119] where Δr p (s) is the three-dimensional correction vector, Δr c (s) is the planar correction vector, δz is the vertical adjustment amount, M z (s) is the vertical bending moment correction vector, L is the overall span of the box girder, Δx,y is the planar adjustment amount, M y (s) is the longitudinal bending moment correction vector, Q x (s) is the transverse shear correction vector.

[0120] Specifically, within the span of the box girder, by adjusting the vertical height change amount in the formula (2) to minimize the integral of the absolute value of the vertical bending moment, the three-dimensional correction vector is quantitatively obtained to reduce the concentrated load and vertical reaction force within the span of the box girder. At the same time, by adjusting the planar displacement change amount within the span of the box girder to minimize the integral of the absolute values of the transverse shear and longitudinal bending moment, the planar correction vector is quantitatively obtained to optimize the force balance in the plane of the box girder and the uniformity of the deflection in the front-back direction.

[0121] Through this solution, by means of mathematical analysis, based on the vertical bending moment correction vector, the longitudinal bending moment correction vector, and the transverse shear correction vector, through the integral minimization algorithm, the three-dimensional correction vector and the planar correction vector are quantitatively obtained, reducing the concentrated load and vertical reaction force within the span of the box girder, and at the same time optimizing the force balance in the plane of the box girder and the uniformity of the deflection in the front-back direction, so that the subsequent jacking node layout strategy based on the jacking indication axis can further ensure the stability and safety of the jacking process.

[0122] In some embodiments, based on the set of axis position variables, according to the overall span of the box girder, the cross-sectional area of the box girder, and the material density of the box girder, the overall bending moment correction vector and the overall shear correction vector are determined, and according to the vertical load angle, the longitudinal load angle, and the transverse load angle, the vertical bending moment correction vector, the longitudinal bending moment correction vector, and the transverse shear correction vector are determined, specifically according to the following formula (3):

[0123]

[0124] where M(s) is the overall bending moment correction vector, Q(s) is the overall shear correction vector, M z (s) is the vertical bending moment correction vector, M y(s) is the longitudinal moment correction vector, Q x (s) is the transverse shear correction vector, ρ is the density of the box girder material, A is the cross-sectional area of the box girder, g is the acceleration due to gravity, L is the overall span of the box girder, s is the axis position variable, θ is the vertical load angle, γ is the longitudinal load angle, and ψ is the transverse load angle.

[0125] Specifically, through in formula (3) to describe the characteristic that the overall moment is quadratically distributed with respect to the axis position variable under the influence of the uniformly distributed load corresponding to the self-weight of the box girder, and then quantitatively obtain the overall moment correction vector; through to describe the characteristic that the overall shear force is linearly distributed with respect to the axis position variable under the influence of the uniformly distributed load corresponding to the self-weight of the box girder, and then quantitatively obtain the overall shear force correction vector; the component of the overall moment in the vertical direction is described by M(s)·cosθ to quantitatively obtain the vertical moment correction vector; the component of the overall moment in the longitudinal direction is described by M(s)·cosγ to quantitatively obtain the longitudinal moment correction vector; the component of the overall shear force in the transverse direction is described by Q(s)·cosψ to quantitatively obtain the transverse shear force correction vector.

[0126] Through this solution, by means of mathematical analysis, based on the axis position variable set, according to the overall span of the box girder, the cross-sectional area of the box girder, and the density of the box girder material, the overall moment correction vector and the overall shear force correction vector are respectively quantified, and combined with the vertical load angle, the longitudinal load angle, and the transverse load angle, the vertical moment correction vector, the longitudinal moment correction vector, and the transverse shear force correction vector are quantitatively obtained, accurately describing the influence of moments and shear forces in different directions, thereby improving the scientificity and accuracy of the above series of correction vectors, and further improving the accuracy of the jacking indication axis.

[0127] In some embodiments, according to the geometric data model of the box girder, the bottom width of the box girder is determined; according to the bottom width of the box girder, the number of jacking nodes in the unit group is determined; based on the preset axis centripetal support node spacing decreasing layout strategy, according to the number of jacking nodes in the unit group, the set of jacking node spacings within the group is determined; based on the number of jacking nodes in the unit group and the set of jacking node spacings within the group, according to the jacking indication axis, a number of key jacking node layout axes parallel to the jacking indication axis and meeting the corresponding spacing requirements within the set of jacking node spacings within the group are determined for the number of jacking nodes in the unit group; according to the overall span of the box girder, the number of jacking node groups and the jacking node group spacing are determined; according to the number of jacking node groups, the jacking node group spacing, the number of jacking nodes in the unit group, the set of jacking node spacings within the group, and a number of key jacking node layout axes, a key jacking node layout strategy is constructed.

[0128] The bottom width of the box girder can be the width value of the bottom of the box girder on the horizontal plane.

[0129] The number of jacking nodes within a unit group can be the number of jacking nodes within each jacking node grouping.

[0130] The preset layout strategy of decreasing the spacing of the centripetal support nodes along the axis can be a spacing allocation strategy in which the spacing between the preset jacking nodes decreases at a fixed ratio towards the side of the jacking indication axis.

[0131] The dataset of the spacing between the jacking nodes within a group can be a data set used to describe the spacing between the jacking nodes within the same jacking node grouping.

[0132] The axis for arranging the key jacking nodes can be an axis used to limit and characterize the arrangement position of the jacking nodes.

[0133] The number of jacking node groups can be the number of jacking node groupings required for the current box girder jacking project.

[0134] The spacing between the jacking node groups can be the spacing between different jacking node groupings.

[0135] Specifically, a large number of jacking devices corresponding to jacking nodes are required to cooperate during the jacking process of the box girder. These jacking nodes need to be divided into several jacking node groups, which are arranged along the jacking indication axis with the jacking indication axis as the reference. This not only improves the jacking stability but also facilitates segmented jacking management. By analyzing the geometric data model of the box girder, the bottom width of the box girder is determined. The bottom width of the box girder determines the number of jacking nodes within a unit jacking node group. The larger the bottom width of the box girder, the more jacking nodes are required within a single jacking node group to ensure the basic stability during the jacking process. The number of jacking nodes within a unit group can be determined based on expert opinions or historical engineering data on the basis of the bottom width of the box girder. After determining the number of jacking nodes within a unit group, during the jacking process of the box girder, the mid-span area of the box girder structure is usually the part where the largest bending moment is most likely to occur. If the jacking indication axis is relatively long, special attention needs to be paid to the mid-span area because the overall stiffness of the box girder is weaker at this position during the jacking process. When the distance between two jacking nodes on both sides of the jacking indication axis is reduced, the bending moment action range generated by the jacking force will be narrower, which can effectively reduce the bending moment peak value in the mid-span area, thereby reducing the stress concentration of the beam body. Therefore, the spacing between jacking nodes within the same jacking node group should not be simply divided according to the equal spacing method, but should adopt a spacing distribution strategy that decreases at a fixed ratio towards one side of the jacking indication axis. After obtaining the reference spacing according to the bottom width of the box girder for the preset axial centripetal support node spacing decreasing layout strategy, it decreases at a ratio of 5% towards one side of the jacking indication axis. On this basis, according to the number of jacking nodes within a unit group, the jacking node spacing data set within the group is determined. After obtaining the number of jacking nodes within a unit group and the jacking node spacing data set within the group, it is necessary to limit the specific layout positions of the jacking nodes. With the jacking indication axis as the reference, several parallel lines corresponding to the number of jacking nodes within a unit group are drawn, and the distance between these parallel lines meets the corresponding spacing requirements within the jacking node spacing data set within the group, obtaining several key jacking node layout axes. The specific position of each jacking node must pass through its corresponding key jacking node layout axis. On this basis, according to the overall span of the box girder, the number of jacking node groups and the jacking node group spacing are determined, and based on the number of jacking node groups, the jacking node group spacing, the number of jacking nodes within a unit group, the jacking node spacing data set within the group, and several key jacking node layout axes, a key jacking node layout strategy is constructed so that the key jacking node layout strategy can map the specific positions of all jacking nodes at the bottom of the box girder.

[0136] Through this solution, based on the lifting indication axis, the bottom width of the box girder, the overall span of the box girder, and the decreasing layout strategy of the centripetal support node spacing of the preset axis, the number of lifting nodes within each unit group, the data set of the spacing between the lifting nodes within the group, several key axis for arranging the lifting nodes, the number of lifting node groups, and the spacing between the lifting node groups are respectively analyzed, and based on this, a key strategy for arranging the lifting nodes is constructed, enabling the key strategy for arranging the lifting nodes to map the specific positions of all lifting nodes at the bottom of the box girder and ensuring the scientificity of the arranged positions of the lifting nodes to improve the stability of the lifting process.

[0137] In some embodiments, the geometric data model of the box girder is analyzed to determine the initial slope of the box girder; based on the spacing between the lifting node groups, the data set of the spacing between the lifting nodes within the group, and several key axis for arranging the lifting nodes, the geometric data model of the box girder is analyzed to determine the initial three-dimensional coordinates and the corresponding initial elevation of each lifting node; based on the initial slope of the box girder, the target slope of the box girder, and the preset compensation constant, according to the initial three-dimensional coordinates and the initial elevation of each lifting node, the total compensated lifting stroke of each lifting node is determined; based on the total compensated lifting stroke of each lifting node, according to the preset number of lifting times, the total compensated lifting stroke corresponding to each lifting node is proportionally divided to determine the data set of the proportionally lifted time-sequence strokes corresponding to each lifting node; according to the total compensated lifting stroke and the data set of the proportionally lifted time-sequence strokes corresponding to each lifting node, a proportional asynchronous lifting strategy is constructed.

[0138] The initial slope of the box girder can be the initial slope of the box girder before the start of the lifting construction.

[0139] The target slope of the box girder can be the slope that the box girder needs to reach after the completion of the lifting construction.

[0140] The initial three-dimensional coordinates can be the three-dimensional coordinates corresponding to the top position of the lifting node.

[0141] The initial elevation can be a quantitative value used to characterize the relative height of the top position of the lifting node.

[0142] The preset compensation constant can be a preset constant value used to adjust the lifting stroke of the lifting node, and the preset compensation constant can be obtained by fitting historical construction data.

[0143] The total compensated lifting stroke can be the total stroke that each lifting node needs to be lifted during the lifting construction after uniformly compensating and adjusting the lifting stroke of the lifting node.

[0144] The preset number of lifting times can be a preset number of lifting times used to limit the number of times required for the lifting node to complete the total compensated lifting stroke. The preset number of lifting times can be set according to the scale of the lifting construction. The larger the scale of the lifting construction, the larger the set value of the preset number of lifting times.

[0145] The same - proportion jacking sequence - stroke dataset can be a data set used to characterize the jacking strokes required to be completed at different jacking nodes at different time points under the same - proportion jacking.

[0146] Specifically, for the box - girder jacking project, in addition to raising the height of the existing box girder, slope adjustment is also required according to specific needs to make the box girder after jacking meet the new traffic requirements. During the slope adjustment of the box - girder jacking, due to the change in the overall slope of the box girder, the height of some local box girders will be lower than the initial height, resulting in negative jacking elevations for some analyzed jacking nodes. This part of the height adjustment needs to be carried out after the adjustment and transformation of the pier height. To facilitate the orderly progress of the overall box - girder jacking and slope - adjustment project, it is necessary to perform proportional compensation for the jacking strokes of different parts of the box girder so that the jacking stroke corresponding to each jacking node is a positive number. After the box girder is integrally jacked through the cooperation of different jacking nodes, the beam is lowered uniformly. By analyzing the geometric data model of the box girder, the initial slope of the box girder is determined. Combining with the target slope of the box girder, the slope difference that the jacking project needs to meet can be reflected. This slope difference determines the overall jacking stroke of the box girder. At the same time, according to the information related to the positions of the jacking nodes reflected by the key jacking - node layout strategy, the initial three - dimensional coordinates and the corresponding initial elevations of each jacking node mapped in the geometric data model of the box girder are extracted, which are used as the analysis basis for the jacking stroke. Then, through mathematical analysis means, based on the initial slope of the box girder, the target slope of the box girder, and a preset compensation constant, according to the initial three - dimensional coordinates and initial elevations of each jacking node, the total compensated jacking stroke of each jacking node is quantified. According to the preset number of jacking times, the total compensated jacking strokes of different jacking nodes are proportionally divided. According to the overall time period of the jacking construction, the time points for different jacking nodes to complete different jacking strokes are marked, and the same - proportion jacking sequence - stroke dataset is constructed. According to the total compensated jacking stroke corresponding to each jacking node and the same - proportion jacking sequence - stroke dataset, a same - proportion asynchronous jacking strategy is constructed, where the total compensated jacking stroke represents the jacking target of each jacking node, and the same - proportion jacking sequence - stroke dataset represents the jacking strokes that each jacking node needs to complete at different time points in the asynchronous state.

[0147] Through this solution, based on the geometric data model of the box girder, according to the key jacking node layout strategy, the initial slope of the box girder, the initial three-dimensional coordinates and the corresponding initial elevation of each jacking node are determined respectively. Combining with the target slope of the box girder, the total compensated jacking stroke of each jacking node is analyzed and obtained. Based on the preset number of jacking times, the total compensated jacking stroke corresponding to each jacking node is divided proportionally to obtain a proportional jacking time-sequence stroke data set. According to the total compensated jacking stroke corresponding to each jacking node and the proportional jacking time-sequence stroke data set, a proportional asynchronous jacking strategy is constructed, so that the proportional asynchronous jacking strategy can clarify the jacking target of each jacking node while characterizing the jacking stroke required by each jacking node at different time points in the asynchronous state, improving the jacking construction efficiency and accuracy.

[0148] In some embodiments, based on the initial slope of the box girder, the target slope of the box girder and a preset compensation constant, according to the initial three-dimensional coordinates and the initial elevation of each jacking node, the total compensated jacking stroke of each jacking node is determined, specifically as the following formula (4):

[0149]

[0150] Where, ΔH i，j is the total jacking stroke of the j-th jacking node in the i-th jacking node group, Z i，j is the initial vertical coordinate of the j-th jacking node in the i-th jacking node group, α t is the target slope, α o is the initial slope, C is the compensation reference value, H i，j，o is the initial elevation of the j-th jacking node in the i-th jacking node group, and S is the preset compensation constant.

[0151] Specifically, the change in the slope of the box girder during the slope adjustment process of the box girder will cause a change in its height in the vertical direction. The corresponding height difference caused by the slope difference is described by (tanα t -tanα o ) in formula (4). On the basis of the initial vertical coordinate corresponding to the jacking node, combined with the above height difference and the compensation reference value, the total jacking stroke corresponding to the jacking node is quantified. By performing a non-negative treatment on the minimum value in the negative stroke, and at the same time combining the corresponding initial elevation and the preset compensation constant, while ensuring that the compensation reference value can eliminate all negative strokes, the jacking strokes of all jacking nodes are uniformly adjusted.

[0152] Through this solution, by means of mathematical analysis, based on the initial slope of the box girder, the target slope of the box girder, and a preset compensation constant, according to the initial three-dimensional coordinates and initial elevation of each jacking node, the jacking stroke of each jacking node is compensated uniformly, and the total compensated jacking stroke corresponding to each jacking node is quantitatively obtained. While eliminating all negative strokes, the jacking strokes of all jacking nodes are adjusted uniformly to improve the stability of the jacking project.

[0153] In some embodiments, according to the same-proportion jacking time-sequence stroke data set corresponding to each jacking node, control each jacking node to perform jacking construction with the corresponding jacking stroke on the box girder at the corresponding time point; dynamically evaluate the jacking safety risk according to the displacement monitoring data, pressure monitoring data, and stress monitoring data; compare the jacking safety risk with a preset safety risk threshold. If the jacking safety risk exceeds the preset safety risk threshold, uniformly control all jacking nodes to stop working, record the current states of all jacking nodes, and output abnormal risk data; when the jacking safety risk drops below the preset safety risk threshold, control all jacking nodes to resume working, and after the jacking construction is completed, construct and output a jacking construction report according to the dynamic jacking monitoring data.

[0154] The dynamic jacking monitoring data includes displacement monitoring data, pressure monitoring data, and stress monitoring data.

[0155] The displacement monitoring data can be data used to characterize the displacement of the box girder during the jacking process, and the displacement monitoring data can be obtained through displacement sensors.

[0156] The pressure monitoring data can be data used to characterize the pressure-bearing situation of the jacking node during the jacking process, and the pressure monitoring data can be obtained through pressure sensors.

[0157] The stress monitoring data can be data used to reflect the stress distribution of the box girder during the jacking process, and the stress monitoring data can be obtained through strain gauges arranged at various parts of the box girder.

[0158] The abnormal risk data can be data used to point to the abnormal parameters of the current jacking construction operation.

[0159] The jacking safety risk can be data used to characterize the construction safety risk during the box girder jacking process.

[0160] The preset safety risk threshold can be a safety risk reference value used to judge whether to interrupt the construction, and the preset safety risk threshold can be obtained by fitting historical project data.

[0161] Specifically, during the jacking of the box girder, it is necessary to monitor the jacking construction situation in real time and dynamically. When the safety risk during the construction increases, the construction needs to be interrupted. After the safety risk is investigated and eliminated, the jacking construction can continue. The safety risks during the jacking construction are mainly caused by the errors generated under the influence of different factors during the construction process. Through mathematical analysis methods, the error data reflected in the displacement monitoring data, pressure monitoring data, and stress monitoring data are comprehensively analyzed to quantify the jacking safety risk under the current construction state, and the jacking safety risk is compared with the preset safety risk threshold. If the jacking safety risk is greater than the preset safety risk threshold, it indicates that continuing the construction may cause a safety accident. At this time, through the unified PLC control system, all jacking nodes are controlled to interrupt the operation. After the professionals investigate and reduce the safety risk, the operation is resumed. After the jacking construction is completed, according to the dynamic jacking monitoring data in the log information, through data visualization technology, a jacking construction report is generated, and through a human-computer interaction device, such as a high-definition display screen, the corresponding jacking construction report is provided to the user.

[0162] Through this solution, based on the displacement monitoring data, pressure monitoring data, and stress monitoring data in the dynamic jacking monitoring data, the jacking safety risk during the construction process is dynamically tracked and evaluated. When the jacking safety risk exceeds the preset safety risk threshold, the jacking operation is interrupted in a timely manner. After the jacking safety risk is effectively reduced, the jacking operation is resumed, and a jacking construction report is constructed and output based on the dynamic jacking monitoring data, further ensuring the safety of the jacking construction process and reducing the probability of safety accidents.

[0163] In some embodiments, the jacking safety risk is dynamically evaluated according to the displacement monitoring data, pressure monitoring data, and stress monitoring data, specifically as the following formula (5):

[0164]

[0165] Among them, R is the jacking safety risk, D is the current displacement value, D c is the displacement error threshold, ∈ is the preset protection parameter, P is the current pressure value, P t is the ideal working pressure value, P c is the pressure critical value, S is the current stress value, S y is the yield stress, k S is the preset adjustment parameter.

[0166] The displacement error threshold can be the maximum box girder displacement error acceptable during the jacking process, and the displacement error threshold can be obtained through simulation experiments.

[0167] The preset protection parameter can be a parameter used to prevent the corresponding mathematical relationship from being meaningless.

[0168] The preset adjustment parameter can be a parameter for adjusting the non-linear influence of stress on jacking safety, and the preset adjustment parameter can be obtained by fitting experimental data.

[0169] The ideal working pressure value can be the ideal pressure value that the jacking node bears during the jacking operation under the current jacking requirement, and the ideal working pressure value can be obtained through simulation experiments.

[0170] The pressure critical value can be the maximum pressure value that the jacking node can bear during the jacking operation, and the pressure critical value is determined by the parameters of the jacking equipment.

[0171] The yield stress can be the yield stress corresponding to the current box girder material, and the yield stress is determined by the vector material strength.

[0172] Specifically, through the in formula (5) to describe the influence of displacement deviation on the jacking safety risk and normalize the risk brought by the displacement deviation; through to describe the non-linear influence of pressure deviation on the jacking safety risk, and the square form emphasizes that a large pressure deviation will significantly increase the jacking safety risk; through to describe the non-linear influence of stress change on the jacking safety risk; by synthesizing the above different influences, the jacking safety risk is quantified.

[0173] Through this solution, by using mathematical analysis means, based on the displacement monitoring data, pressure monitoring data and stress monitoring data, the influence relationships between the three main risk sources (displacement, pressure and stress) during the jacking process and the jacking safety risk are respectively clarified, so as to quantify the jacking safety risk and improve the scientificity and accuracy of the jacking safety risk.

Claims

1. A method for lifting a concrete continuous box girder based on intelligent control, characterized in that: include: Acquire a box girder jacking engineering data set, analyze the box girder jacking engineering data set, and determine key jacking indication data; Determine a key jacking node layout strategy based on the box girder jacking engineering data set and the jacking key indication data; According to the key jacking node layout strategy, the box girder jacking engineering data set is analyzed to determine the same-proportional asynchronous jacking strategy; According to the same-proportional asynchronous jacking strategy, jacking construction is carried out, and dynamic jacking monitoring data is obtained. The jacking construction process is dynamically fine-tuned according to the dynamic jacking monitoring data, and a jacking construction report is determined and output.

2. The method according to claim 1, characterized in that The box girder jacking engineering data set includes a box girder geometric data model and a box girder material density. The box girder jacking engineering data set is analyzed to determine key jacking indication data, including: Analyze the box girder geometric data model to determine the box girder geometric center of gravity axis, the box girder overall span and the box girder cross-sectional area; According to the box girder geometric data model, the box girder geometric center of gravity axis is divided into axis position points to determine an axis position variable set; Analyze the axis position variable set according to the box girder geometric data model to determine the vertical load angle, longitudinal load angle and transverse load angle corresponding to each axis position variable; Based on the axis position variable set, according to the overall span of the box girder, the cross-sectional area of ​​the box girder and the material density of the box girder, an overall bending moment correction vector and an overall shear force correction vector are determined, and according to the vertical load angle, the longitudinal load angle and the transverse load angle, a vertical bending moment correction vector, a longitudinal bending moment correction vector and a transverse shear force correction vector are determined; Determine a three-dimensional correction vector and a plane correction vector according to the vertical bending moment correction vector, the longitudinal bending moment correction vector and the transverse shear correction vector; Based on the geometric centroid axis of the box girder, according to the overall bending moment correction vector, the overall shear force correction vector, the three-dimensional correction vector and the plane correction vector, a jacking indication axis is determined; The jacking indication axis is determined as the jacking key indication data.

3. The method according to claim 2, characterized in that The jacking indication axis is determined based on the geometric center of gravity axis of the box girder according to the overall bending moment correction vector, the overall shear correction vector, the three-dimensional correction vector and the plane correction vector, specifically the following formula: Among them, r u (s) is the lifting indication axis, r(s) is the geometric center of gravity axis of the box girder, Δrp(s) is the three-dimensional correction vector, Δr c (s) is the plane correction vector, s is the axis position variable, Δr(s) is the displacement adjustment, L is the overall span of the box girder, M(s) is the overall bending moment correction vector, and Q(s) is the overall shear force correction vector.

4. The method according to claim 2, characterized in that: The three-dimensional correction vector and the plane correction vector are determined according to the vertical bending moment correction vector, the longitudinal bending moment correction vector and the transverse shear correction vector, which is specifically the following formula: Among them, Δr p (s) is the stereo correction vector, Δr c (s) is the plane correction vector, δz is the vertical adjustment amount, M z (s) is the vertical bending moment correction vector, L is the overall span of the box girder, Δx,y is the plane adjustment amount, M y (s) is the longitudinal bending moment correction vector, Q x (s) is the transverse shear correction vector.

5. The method according to claim 3, characterized in that: The above-mentioned method is based on the axis position variable set, determines the overall bending moment correction vector and the overall shear force correction vector according to the overall span of the box girder, the cross-sectional area of ​​the box girder and the material density of the box girder, and determines the vertical bending moment correction vector, the longitudinal bending moment correction vector and the transverse shear force correction vector according to the vertical load angle, the longitudinal load angle and the transverse load angle, which are specifically the following formulas: Wherein, M(s) is the overall bending moment correction vector, Q(s) is the overall shear force correction vector, and M z (s) is the vertical bending moment correction vector, M y (s) is the longitudinal bending moment correction vector, Q x (s) is the transverse shear correction vector, ρ is the material density of the box girder, A is the cross-sectional area of ​​the box girder, g is the acceleration of gravity, L is the overall span of the box girder, s is the axis position variable, θ is the vertical load angle, γ is the longitudinal load angle, and ψ is the transverse load angle.

6. The method according to claim 2, characterized in that The box girder jacking engineering data set also includes a cap beam geometric model. The key jacking node layout strategy is determined based on the box girder jacking engineering data set and the jacking key indication data, including: Determine the bottom width of the box girder according to the box girder geometric data model; Determine the number of jacking nodes in the unit group according to the bottom width of the box girder; Based on the preset axis centripetal support node spacing decreasing layout strategy, according to the number of jacking nodes in the unit group, determine the jacking node spacing data set within the group; Based on the number of jacking nodes in the unit group and the jacking node spacing data set within the group, and according to the jacking indication axis, determine a number of key jacking node layout axes that are parallel to the jacking indication axis and meet the corresponding spacing requirements in the jacking node spacing data set within the group; Determine the number of jacking node groups and the spacing between jacking node groups according to the overall span of the box girder; The key jacking node layout strategy is constructed according to the number of jacking node groups, the spacing between jacking node groups, the number of jacking nodes in the unit group, the jacking node spacing data set in the group and a number of key jacking node layout axes.

7. The method according to claim 6, characterized in that The box girder jacking engineering data set includes a target box girder slope. The box girder jacking engineering data set is analyzed according to the key jacking node layout strategy to determine the same-proportional asynchronous jacking strategy, including: Analyze the box girder geometric data model to determine the initial slope of the box girder; Based on the jacking node group spacing, the jacking node spacing data set within the group and the layout axes of several key jacking nodes, the box girder geometric data model is analyzed to determine the initial three-dimensional coordinates and the corresponding initial elevation of each jacking node; Based on the initial slope of the box girder, the target slope of the box girder and a preset compensation constant, and according to the initial three-dimensional coordinates and the initial elevation of each jacking node, determine the total jacking stroke after compensation of each jacking node; Based on the total jacking stroke after compensation of each jacking node, according to the preset jacking times, the total jacking stroke after compensation corresponding to each jacking node is divided in the same proportion, and a jacking time sequence stroke data set of the same proportion corresponding to each jacking node is determined; The same-proportional asynchronous jacking strategy is constructed according to the compensated total jacking stroke and the same-proportional jacking time sequence stroke data set corresponding to each jacking node.

8. The method according to claim 7, characterized in that Based on the initial slope of the box girder, the target slope of the box girder and the preset compensation constant, the total jacking stroke after compensation of each jacking node is determined according to the initial three-dimensional coordinates and the initial elevation of each jacking node, which is specifically the following formula: Where ΔH i,j is the total lifting stroke of the jth lifting node in the i-th lifting node group, Z i,j is the initial vertical coordinate of the jth lifting node in the i-th lifting node group, α t is the target slope, α o is the initial slope, C is the compensation reference value, H i,j,o is the initial elevation of the jth lifting node in the i-th lifting node group, and S is the preset compensation constant.

9. The method according to claim 8, characterized in that The dynamic jacking monitoring data includes displacement monitoring data, pressure monitoring data, and stress monitoring data. According to the same-proportional asynchronous jacking strategy, jacking construction is performed, and dynamic jacking monitoring data is obtained. According to the dynamic jacking monitoring data, the jacking construction process is dynamically fine-tuned, and a jacking construction report is determined and output, including: According to the same proportion jacking time sequence travel data set corresponding to each jacking node, each jacking node is controlled to perform jacking construction of the box girder with the corresponding jacking travel at the corresponding time point; Dynamically assessing the jacking safety risk according to the displacement monitoring data, the pressure monitoring data and the stress monitoring data; Compare the lifting safety risk with a preset safety risk threshold. If the lifting safety risk exceeds the preset safety risk threshold, all lifting nodes are uniformly controlled to stop operation, the current status of all lifting nodes is recorded, and abnormal risk data is output; When the jacking safety risk drops below the preset safety risk threshold, all jacking nodes are controlled to resume operation, and after the jacking construction is completed, the jacking construction report is constructed and output based on the dynamic jacking monitoring data.

10. The method according to claim 9, characterized in that The jacking safety risk is dynamically evaluated based on the displacement monitoring data, the pressure monitoring data and the stress monitoring data, specifically the following formula: Where R is the safety risk of lifting, D is the current displacement value, and D c is the displacement error threshold, ∈ is the preset protection parameter, P is the current pressure value, P t is the ideal working pressure value, P c is the critical pressure value, S is the current stress value, S y is the yield stress, k S The preset adjustment parameters.

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