Three-dimensional visual full-field monitoring method and system for whole bridge rotation process

Abstract

The invention provides a three-dimensional visual full-field monitoring method and system for the whole process of bridge rotation, and relates to the technical field of bridge monitoring, and the method comprises the steps: obtaining design parameters and a construction plan of a bridge; generating a dynamic BIM bridge model according to the design parameters and the construction plan; setting a virtual sampling point at the virtual swivel key position of the dynamic BIM bridge model, and setting an actual sampling point at the swivel key position of the swivel bridge; acquiring actual coordinate information of the actual sampling point in a preset coordinate system, and determining virtual coordinate information of the virtual sampling point in the preset coordinate system; obtaining construction environment data of the construction site; determining a construction safety coefficient according to the construction environment data, the construction plan, the actual coordinate information and the virtual coordinate information; acquiring working data of the hydraulic system; determining a stability coefficient of the hydraulic system; and determining a full-field monitoring report. According to the invention, the real-time performance and comprehensiveness of bridge rotation whole-process monitoring can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge monitoring, and in particular to a method and system for three-dimensional visualization of full-field monitoring of the entire bridge rotation process. Background Art

[0002] In related technologies, bridge rotation monitoring mainly relies on sensor detection combined with manual supervision, that is, it mainly relies on human factors. Excessive reliance on human factors may make it difficult to ensure the timeliness and accuracy of data processing, resulting in poor real-time performance of monitoring results and limited accuracy of monitoring results.

[0003] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0004] The present invention provides a three-dimensional visual full-field monitoring method and system for the entire process of bridge rotation, which can solve the technical problem that related technologies cannot guarantee the real-time and accuracy of monitoring results.

[0005] According to a first aspect of the present invention, a method for three-dimensional visualization of the entire bridge rotation process is provided, comprising: obtaining design parameters and a construction plan of the bridge; generating a dynamic BIM bridge model based on the design parameters and the construction plan; setting virtual sampling points at virtual rotation key positions of the dynamic BIM bridge model, and setting actual sampling points at rotation key positions of the rotating bridge; obtaining actual coordinate information of the actual sampling points in a preset coordinate system at multiple times during a monitoring cycle, and determining virtual coordinate information of the virtual sampling points in the preset coordinate system based on a mapping relationship between the rotating bridge and the dynamic BIM bridge model, wherein the preset coordinate system is a coordinate system established based on a preset origin within the range of the rotating bridge; obtaining construction environment data of the construction site at multiple times during the monitoring cycle; determining a construction safety factor based on the construction environment data, the construction plan, the actual coordinate information, and the virtual coordinate information; obtaining operating data of the hydraulic system at multiple times during the monitoring cycle; determining a hydraulic system stability factor based on the operating data; and determining a full-site monitoring report based on the construction safety factor and the hydraulic system stability factor.

[0006] According to the present invention, the construction safety factor is determined based on the construction environment data, the construction plan, the actual coordinate information and the virtual coordinate information, including: determining the rainfall and wind data based on the construction environment data; determining the actual support coordinate information of the rotation support point based on the actual coordinate information; determining the actual monitoring coordinate information of the rotation monitoring point based on the actual coordinate information; determining the settlement safety factor based on the rainfall, the wind data and the actual support coordinate information; determining the rotation safety factor based on the actual monitoring coordinate information and the virtual coordinate information; and determining the construction safety factor based on the settlement safety factor and the rotation safety factor.

[0007] According to the present invention, a settlement safety factor is determined based on the rainfall, the wind data and the actual support coordinate information, including: determining the wind level and wind direction based on the wind data; determining the support point settlement of the rotating support point based on the actual support coordinate information; determining the distance between support points and the direction between support points based on the actual support coordinate information; determining a preset settlement difference threshold based on the distance between support points; determining the wind direction angle based on the wind direction and the direction between support points; determining the settlement safety factor based on the support point settlement, the preset settlement difference threshold, the wind level, the wind direction angle and the rainfall.

[0008] According to the present invention, the settlement safety factor is determined based on the settlement of the support point, the preset settlement difference threshold, the wind force level, the wind direction angle and the rainfall, including: according to the formula , , determine the settlement safety factor at the i-th moment of the monitoring period , where max is the maximum value function, is the preset sedimentation rate threshold, is the rainfall at the i-th moment of the monitoring period, is the preset rainfall threshold, is the first piecewise function, is the settlement of the kth rotation support point at the i-th moment of the monitoring period, is the settlement of the j-th rotation support point at the i-th moment of the monitoring period, is the preset settlement difference threshold between the kth rotation support point and the jth rotation support point, is the wind force level at the i-th moment of the monitoring period, is the wind direction angle between the kth rotation support point and the jth rotation support point and the wind direction at the i-th moment of the monitoring period, is the preset wind force level threshold, K is the number of rotation support points, j≤K, k≤K, j, k and K are all positive integers.

[0009] According to the present invention, the rotation safety factor is determined based on the actual monitoring coordinate information and the virtual coordinate information, including: determining the monitoring priority of each rotation monitoring point based on the design parameters; obtaining the preset attitude angle, preset stress value and preset strain value of the rotation monitoring point based on the dynamic BIM bridge model at multiple moments in the monitoring period; determining the virtual monitoring coordinate information of the rotation monitoring point based on the virtual coordinate information; obtaining the actual attitude angle, actual stress value and actual strain value of the rotation monitoring point at multiple moments in the monitoring period; determining the preset rotation state vector based on the virtual monitoring coordinate information, the preset attitude angle, the preset stress value and the preset strain value; determining the actual rotation state vector based on the actual monitoring coordinate information, the actual attitude angle, the actual stress value and the actual strain value; determining the rotation safety factor based on the monitoring priority, the preset rotation state vector and the actual rotation state vector.

[0010] According to the present invention, the rotation safety factor is determined based on the monitoring priority, the preset rotation state vector and the actual rotation state vector, including: according to the formula , , , determine the rotation safety factor at the i-th moment of the monitoring period , where min is the minimum function, is the second piecewise function, is the third piecewise function, is the actual monitoring coordinate information of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual attitude angle of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual stress value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual strain value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual rotation state vector of the rth rotation monitoring point at the i-th moment of the monitoring period, for The transposed vector of is the virtual monitoring coordinate information of the rth rotation monitoring point at the i-th moment of the monitoring cycle, The preset attitude angle of the rth rotation monitoring point at the i-th moment of the monitoring period, is the preset stress value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the preset strain value of the rth rotation monitoring point at the i-th moment of the monitoring period, The preset rotation state vector of the rth rotation monitoring point at the i-th moment of the monitoring period, is the monitoring priority of the rth rotation monitoring point, is the preset monitoring priority threshold, R is the number of rotation monitoring points, r≤R, and both r and R are positive integers.

[0011] According to the present invention, the hydraulic system stability coefficient is determined based on the working data, including: determining the hydraulic oil temperature, hydraulic oil level and hydraulic system working pressure based on the working data; obtaining normal oil temperature, warning oil temperature and stop oil temperature; determining the hydraulic oil level stability identification result based on the hydraulic oil level; determining the hydraulic oil temperature safety identification result based on the hydraulic oil temperature, the normal oil temperature, the warning oil temperature and the stop oil temperature; determining the working pressure stability identification result based on the hydraulic system working pressure and the construction plan; determining the hydraulic system stability coefficient based on the hydraulic oil level stability identification result, the hydraulic oil temperature safety identification result and the working pressure stability identification result.

[0012] According to the present invention, a stable identification result of the hydraulic oil level is determined based on the hydraulic oil level, including: fitting the hydraulic oil level and the moments in the current monitoring cycle to obtain a hydraulic oil level function of the hydraulic oil level in the current monitoring cycle; determining a hydraulic oil level derivative function based on the hydraulic oil level function; determining the hydraulic oil level change rate at multiple moments in the monitoring cycle based on the hydraulic oil level derivative function; determining a stable identification result of the hydraulic oil level change based on the hydraulic oil level change rate and a preset hydraulic oil level change rate threshold; determining a safe identification result of the hydraulic oil level based on the hydraulic oil level and the preset hydraulic oil level threshold; determining a stable identification result of the hydraulic oil level based on the stable identification result of the hydraulic oil level change and the safe identification result of the hydraulic oil level.

[0013] According to the present invention, a working pressure stability identification result is determined based on the hydraulic system working pressure and the construction plan, including: determining the rotation stage corresponding to the moment of the current monitoring period based on the construction plan; determining the pressure fluctuation tolerance corresponding to the rotation stage; determining the working pressure fluctuation based on the hydraulic system working pressure; determining the working pressure fluctuation stability identification result based on the working pressure fluctuation and the pressure fluctuation tolerance corresponding to the rotation stage; determining the working pressure safety identification result based on the hydraulic system working pressure and a preset hydraulic system working pressure threshold; determining the working pressure stability identification result based on the working pressure fluctuation stability identification result and the working pressure safety identification result.

[0014] According to a second aspect of the present invention, a three-dimensional visualization full-field monitoring system for the entire process of bridge rotation is provided, comprising: a construction information module for obtaining design parameters and a construction plan of the bridge; a bridge model module for generating a dynamic BIM bridge model based on the design parameters and the construction plan; a sampling setting module for setting virtual sampling points at virtual rotation key positions of the dynamic BIM bridge model, and setting actual sampling points at rotation key positions of the rotating bridge; a coordinate information module for obtaining actual coordinate information of actual sampling points in a preset coordinate system at multiple moments during a monitoring period, and determining the virtual sampling points at the preset coordinate system based on the mapping relationship between the rotating bridge and the dynamic BIM bridge model. The virtual coordinate information in the preset coordinate system is a coordinate system established based on a preset origin within the range of the rotating bridge; an environmental data module is used to obtain the construction environment data of the construction site at multiple moments in the monitoring period; a safety factor module is used to determine the construction safety factor based on the construction environment data, the construction plan, the actual coordinate information and the virtual coordinate information; a working data module is used to obtain the working data of the hydraulic system at multiple moments in the monitoring period; a stability coefficient model is used to determine the stability coefficient of the hydraulic system based on the working data; a monitoring report module is used to determine a full-site monitoring report based on the construction safety factor and the stability coefficient of the hydraulic system.

[0015] Technical Effect: According to the present invention, a dynamic BIM bridge model can be generated based on the design parameters and construction plan of the bridge, and the construction environment data and hydraulic system operating data of the construction site can be accurately collected. Based on the dynamic BIM bridge model and construction environment data, the safety status of the bridge body during the rotation process can be accurately analyzed to determine the construction safety factor. Based on the operating data, the safety status of the hydraulic system can be accurately analyzed to determine the hydraulic system stability factor. Furthermore, a bridge rotation monitoring platform can be built based on the Web using a B / S architecture, and the dynamic BIM model, construction safety factor, and hydraulic system stability factor can be integrated into the bridge rotation monitoring platform, thereby improving the real-time and comprehensive monitoring of the entire bridge rotation process. When determining the settlement safety factor, the settlement safety factor is determined based on the support point settlement, the preset settlement difference threshold, the support point direction, the wind force level, the wind direction angle, and the rainfall. During the calculation process, the influence of rainfall and wind force data on the settlement rate safety and the settlement unevenness safety can be accurately analyzed. Furthermore, the settlement safety factor is determined based on the two aspects of settlement rate safety and settlement unevenness safety, thereby improving the comprehensiveness and accuracy of the settlement safety factor. When determining the rotation safety factor, the rotation safety factor can be determined based on the monitoring priority, the preset rotation state vector and the actual rotation state vector. During the calculation process, a similarity operation can be performed based on the actual rotation state vector and the preset rotation state vector, and a weighting coefficient can be determined based on the monitoring priority. The rotation state safety of the rotation monitoring point can be accurately analyzed based on the similarity and the weighting coefficient, thereby improving the accuracy of the rotation safety factor.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and not limiting of the present invention. Other features and aspects of the present invention will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can derive other embodiments based on these drawings without inventive efforts. Figure 1 A schematic diagram exemplarily illustrates a flow chart of a method for three-dimensional visualization of the entire bridge rotation process according to an embodiment of the present invention; Figure 2 A schematic diagram exemplarily illustrates calculation of a construction safety factor according to an embodiment of the present invention; Figure 3 A schematic diagram exemplarily showing calculation of a stability coefficient of a hydraulic system according to an embodiment of the present invention; Figure 4 A block diagram of a three-dimensional visualization full-field monitoring system for the entire process of bridge rotation according to an embodiment of the present invention is exemplarily shown. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0020] Figure 1 A flow chart of a method for three-dimensional visualization of the entire bridge rotation process according to an embodiment of the present invention is exemplarily shown. The method includes: Step S1, obtaining the design parameters and construction plan of the bridge; Step S2, generating a dynamic BIM bridge model according to the design parameters and the construction plan; Step S3, setting virtual sampling points at the virtual rotation key positions of the dynamic BIM bridge model, and setting actual sampling points at the rotation key positions of the rotating bridge; Step S4: At multiple moments in the monitoring period, actual coordinate information of the actual sampling points in a preset coordinate system is obtained, and virtual coordinate information of the virtual sampling points in the preset coordinate system is determined based on a mapping relationship between the rotating bridge and the dynamic BIM bridge model, wherein the preset coordinate system is a coordinate system established based on a preset origin within the range of the rotating bridge; Step S5, obtaining construction environment data of the construction site at multiple moments in the monitoring cycle; Step S6, determining a construction safety factor based on the construction environment data, the construction plan, the actual coordinate information, and the virtual coordinate information; Step S7, obtaining the working data of the hydraulic system at multiple moments in the monitoring cycle; Step S8, determining the hydraulic system stability coefficient based on the working data; Step S9: determining a full-site monitoring report based on the construction safety factor and the hydraulic system stability factor.

[0021] According to the method for full-field monitoring of the entire bridge rotation process using three-dimensional visualization according to an embodiment of the present invention, a dynamic BIM bridge model can be generated based on the design parameters and construction plan of the bridge, and the construction environment data and the working data of the hydraulic system at the construction site can be accurately collected. Based on the dynamic BIM bridge model and the construction environment data, the safety status of the bridge body during the rotation process can be accurately analyzed, and the construction safety factor can be determined. Based on the working data, the working safety status of the hydraulic system can be accurately analyzed, and the stability factor of the hydraulic system can be determined. Furthermore, a bridge rotation monitoring platform can be built based on the Web using a B / S architecture, and the dynamic BIM model, the construction safety factor, and the hydraulic system stability factor can be integrated into the bridge rotation monitoring platform, which can improve the real-time and comprehensiveness of monitoring the entire bridge rotation process.

[0022] According to one embodiment of the present invention, in step S1 , design parameters and construction plans of a bridge are obtained.

[0023] For example, the design parameters of the bridge (e.g., geometric dimensions, material properties, structural details, spherical joint locations, rotation centers, center of gravity locations, and rotation radius) and the construction plan (e.g., rotation start time, rotation speed, rotation angle, and postures at different stages) are obtained based on the construction documents.

[0024] According to one embodiment of the present invention, in step S2, a dynamic BIM bridge model is generated based on the design parameters and the construction plan.

[0025] For example, in professional BIM software (such as Autodesk Revit), an accurate BIM bridge model is generated based on design parameters, and the BIM bridge model is associated with the construction plan to establish a 4DBIM model, that is, a dynamic BIM model.

[0026] According to one embodiment of the present invention, in step S3, virtual sampling points are set at virtual rotation key positions of the dynamic BIM bridge model, and actual sampling points are set at rotation key positions of the rotating bridge.

[0027] For example, actual sampling points are set at the key rotation positions of the rotating bridge. The key rotation positions include: the rotation core point, the bridge end, the rotating pier and its foundation, etc. In the dynamic BIM bridge model, virtual sampling points are set at the rotation core point, the bridge end, the rotating pier and its foundation, etc., that is, the virtual rotation key positions.

[0028] According to one embodiment of the present invention, in step S4, at multiple moments in the monitoring period, actual coordinate information of the actual sampling points in the preset coordinate system is obtained, and based on the mapping relationship between the rotating bridge and the dynamic BIM bridge model, virtual coordinate information of the virtual sampling points in the preset coordinate system is determined, wherein the preset coordinate system is a coordinate system established based on a preset origin within the range where the rotating bridge is located.

[0029] For example, reference wireless ranging sensors are set at three preset points with known coordinates. The actual coordinate information of the actual sampling points in the preset coordinate system is obtained according to the wireless ranging sensors set at the actual sampling points. The virtual coordinate information of the virtual sampling points in the preset coordinate system is determined according to the mapping relationship between the rotating bridge and the dynamic BIM bridge model. The preset coordinate system is a coordinate system established based on a preset origin within the range of the rotating bridge, with the ground as the xoy plane of the coordinate system, the east direction as the x-axis of the coordinate system, the north direction as the y-axis of the coordinate system, and the vertical upward direction as the z-axis of the coordinate system.

[0030] According to one embodiment of the present invention, in step S5, the construction environment data of the construction site is acquired at multiple moments in the monitoring cycle.

[0031] For example, by setting up wind sensors and rain gauges at the construction site, the construction environment data of the construction site can be detected. The data collected by the sensors can be uploaded to the cloud in real time and processed in the system background. The processed data can be synchronously, in real time, and dynamically displayed through other information such as the Web display platform and BIM models.

[0032] According to one embodiment of the present invention, in step S6, a construction safety factor is determined based on the construction environment data, the construction plan, the actual coordinate information, and the virtual coordinate information.

[0033] Figure 2 A schematic diagram exemplarily shows the calculation of the construction safety factor according to an embodiment of the present invention.

[0034] According to one embodiment of the present invention, step S6 includes: Step S61, determining rainfall and wind data based on the construction environment data; Step S62, determining the actual support coordinate information of the rotation support point according to the actual coordinate information; Step S63, determining the actual monitoring coordinate information of the rotation monitoring point according to the actual coordinate information; Step S64, determining a settlement safety factor based on the rainfall, the wind data, and the actual support coordinate information; Step S65, determining a rotation safety factor based on the actual monitoring coordinate information and the virtual coordinate information; Step S66: Determine the construction safety factor based on the settlement safety factor and the rotation safety factor.

[0035] For example, by setting up wind sensors and rain gauges at the construction site, the rainfall data and wind data of the construction site are obtained; the coordinate information of the actual sampling points at the rotation support position (such as the rotation bridge pier and its foundation) is determined from the actual coordinate information of multiple actual sampling points, that is, the actual support coordinate information of the rotation support point; the coordinate information of the actual sampling points at the preset rotation monitoring position (such as the rotation core point, the end of the bridge) is determined from the actual coordinate information of multiple actual sampling points, that is, the actual monitoring coordinate information of the rotation monitoring point; based on the rainfall, wind data and actual support coordinate information, the settlement safety status of the rotation foundation of the bridge under the current environmental conditions is evaluated. The settlement safety factor is evaluated based on the actual monitoring coordinate information and the virtual coordinate information, and the safety condition of the bridge during the rotation process is evaluated to determine the rotation safety factor. If the settlement safety factor is less than the preset settlement safety factor threshold, the settlement safety result is determined to be 0, otherwise, the settlement safety result is 1, and the preset settlement safety factor threshold can be set to 1. If the rotation safety factor is less than the preset rotation safety factor threshold, the rotation safety result is determined to be 0, otherwise, the rotation safety result is 1, and the preset rotation safety factor threshold can be set to 0.95. The construction safety factor is determined based on the sum of the settlement safety result and the rotation safety result.

[0036] According to one embodiment of the present invention, step S64 includes: Step S641, determining the wind force level and wind force direction according to the wind force data; Step S642, determining the support point settlement of the rotating support point according to the actual support coordinate information; Step S643, determining the distance between support points and the direction between support points according to the actual support coordinate information; Step S644: determining a preset settlement difference threshold value based on the distance between the support points; Step S645, determining the wind direction angle according to the wind direction and the direction between the support points; Step S646: Determine a settlement safety factor based on the settlement of the support point, the preset settlement difference threshold, the wind force level, the wind direction angle, and the rainfall.

[0037] For example, the wind data collected by the wind sensor (such as a digital wind vane) is used to determine the wind level and wind direction; the position of the rotating support point on the z-axis of the preset coordinate system is determined based on the actual support coordinate information of the rotating support point; the support point settlement of the rotating support point at the current moment is determined based on the position of the rotating support point on the z-axis of the preset coordinate system at the current moment and the position on the z-axis of the preset coordinate system at the initial moment of the monitoring period; the horizontal distance between the two rotating support points on the xoy plane of the preset coordinate system, that is, the distance between the support points, and the orientation between the two rotating support points, that is, the direction between the support points, such as, rotating support point A The actual support coordinate information of A is (0,0,0), and the actual support coordinate information of B rotation support point is (1,0,0), then B rotation support point is due east of A rotation support point; according to the distance between the two rotation support points divided by 2000, the preset settlement difference threshold corresponding to the two rotation support points is determined; according to the wind direction and the direction between the support points, the wind direction angle is determined, for example, if the wind direction is due east and the direction between the support points of the two support points is due east, the wind direction angle is 0 degrees; according to the settlement of the support points, the preset settlement difference threshold, wind force level, wind direction angle and rainfall, the settlement safety status of the rotation foundation is evaluated and the settlement safety factor is determined.

[0038] According to one embodiment of the present invention, step S646 includes: determining the settlement safety factor at the i-th moment of the monitoring period according to formulas (1) and (2): , (1), (2), where max is the maximum value function, is the preset sedimentation rate threshold, is the rainfall at the i-th moment of the monitoring period, is the preset rainfall threshold, is the first piecewise function, is the settlement of the kth rotation support point at the i-th moment of the monitoring period, is the settlement of the j-th rotation support point at the i-th moment of the monitoring period, is the preset settlement difference threshold between the kth rotation support point and the jth rotation support point, is the wind force level at the i-th moment of the monitoring period, is the wind direction angle between the kth rotation support point and the jth rotation support point and the wind direction at the i-th moment of the monitoring period, is the preset wind force level threshold, K is the number of rotation support points, j≤K, k≤K, j, k and K are all positive integers.

[0039] According to one embodiment of the present invention, The maximum value of the settlement of the K rotating support points at the i-th moment of the monitoring period is taken. The above maximum value processing can be used to determine the most serious settlement condition at the i-th moment of the monitoring period. is the maximum settlement rate of the K rotation support points at the i-th moment of the monitoring period. If the settlement rate is too fast, it may destroy the stability of the rotation system and cause the ball joint rotation system to fail. is the relative difference between the preset settlement rate threshold and the maximum settlement rate. The larger the ratio, the smaller the maximum settlement rate of the K rotating support points at the i-th moment of the monitoring period, and the smaller the risk of failure of the ball joint rotation system. The preset settlement rate threshold can be set to 0.12 mm / min. In formula (2), the first piecewise function The value of includes the following two cases: When the rainfall at the i-th moment of the monitoring period is less than the preset rainfall threshold, it means that the rainfall is within the normal range and has little impact on the settlement rate of the support point. The value of the first piecewise function is 1. When , it means that the rainfall is large, which will accelerate the settlement rate of the support point. The value of the first piecewise function is , It is the ratio of the preset rainfall threshold to the rainfall at the i-th moment of the monitoring period. The smaller the ratio, the greater the rainfall at the i-th moment of the monitoring period. Excessive rainfall may cause the base soil to soften and settle, resulting in a surge in the settlement rate of the support point. The preset rainfall threshold is determined based on the current soil properties of the construction. For example, when the soil is a soft foundation, the preset rainfall threshold is 0.1mm / min. When the soil is other geological conditions, the preset rainfall threshold is 0.3mm / min. The coefficient that represents the influence of rainfall on the dangerousness of sedimentation rate, It indicates the safety factor of the settlement rate after considering the influence of rainfall. The smaller the value, the lower the safety. According to one embodiment of the present invention, is the difference in support point settlement between the kth rotation support point and the jth rotation support point at the i-th moment of the monitoring period, It is the relative difference between the preset settlement difference threshold and the settlement difference between the kth rotation support point and the jth rotation support point. The larger the ratio, the smaller the settlement difference between the kth rotation support point and the jth rotation support point, the lower the settlement unevenness between the support points, and the higher the safety. The maximum value of the relative difference between the support point settlement amount difference between any two rotation support points and the corresponding preset settlement amount difference threshold is taken. The above maximum value processing can be used to determine the situation where the support point settlement amount difference between any two rotation support points is the largest, that is, the situation where the uneven settlement between the support points is the most dangerous. The product of the wind force level at the i-th moment of the monitoring period and the wind direction angle between the k-th and j-th rotating support points and the wind direction at the i-th moment of the monitoring period, indicating the wind force level in the direction of uneven settlement formed by the wind force level acting on the k-th and j-th rotating support points. It is the ratio of the preset wind level threshold to the wind level in the direction of uneven settlement caused by the wind level acting on the kth rotation support point and the jth rotation support point. The smaller the ratio, the greater the wind level acting in the direction of uneven settlement, the more likely it is to cause the bridge to tilt, and the lower the safety. The preset wind level threshold can be set to level 4. The coefficient indicating the influence of wind conditions on uneven settlement conditions, It represents the safety factor of settlement unevenness after considering the influence of wind. The smaller the value, the lower the safety.

[0040] According to one embodiment of the present invention, It means that the settlement safety factor is determined based on two aspects: the safety of settlement rate and the safety of uneven settlement.

[0041] In this way, the settlement safety factor is determined based on the settlement of the support point, the preset settlement difference threshold, the support point direction, the wind force level, the wind direction angle and the rainfall. During the calculation process, the influence of rainfall and wind force data on the safety of settlement rate and the safety of uneven settlement conditions can be accurately analyzed respectively. Furthermore, the settlement safety factor is determined based on the two aspects of settlement rate safety and uneven settlement condition safety, thereby improving the comprehensiveness and accuracy of the settlement safety factor.

[0042] According to one embodiment of the present invention, step S65 includes: Step S651, determining the monitoring priority of each rotating monitoring point according to the design parameters; Step S652: obtaining a preset attitude angle, a preset stress value, and a preset strain value of the rotation monitoring point according to the dynamic BIM bridge model at multiple moments in the monitoring cycle; Step S653, determining virtual monitoring coordinate information of the rotation monitoring point according to the virtual coordinate information; Step S654, obtaining the actual posture angle, actual stress value, and actual strain value of the rotation monitoring point at multiple moments in the monitoring cycle; Step S655, determining a preset rotation state vector according to the virtual monitoring coordinate information, the preset posture angle, the preset stress value, and the preset strain value; Step S656, determining an actual rotation state vector according to the actual monitoring coordinate information, the actual posture angle, the actual stress value, and the actual strain value; Step S657: determining a rotation safety factor according to the monitoring priority, the preset rotation state vector, and the actual rotation state vector.

[0043] For example, according to the design parameters, the importance of each rotation monitoring point in the bridge rotation process is determined, and the monitoring priority of each rotation monitoring point is determined. The monitoring priority is divided into levels 1-6. The larger the monitoring priority, the more important the position. For example, the monitoring priority of the core area of ​​the spherical joint is level 6, the monitoring priority of the strong wind response point (such as the top of the beam) is level 5, the monitoring priority of the cyclically loaded components (such as the fatigue point of the traction cable anchor) is level 4, the monitoring priority of the anti-overturning system position (such as the support leg and slideway gap monitoring point) is level 3, the monitoring priority of the cyclically loaded components (such as the fatigue point of the traction cable anchor) is level 2, and the monitoring priority of the balance system position (such as the top of the auxiliary support) is level 1; the dynamic BIM model generates the preset attitude angle and preset stress of the rotation monitoring point in the process of simulating the bridge rotation. value and preset strain value; determine the virtual monitoring coordinate information of the virtual sampling point corresponding to the rotation monitoring point in the dynamic BIM model in the preset coordinate system; at multiple moments in the monitoring period, obtain the actual attitude angle, actual stress value and actual strain value of the rotation monitoring point through sensors (such as high-precision total station, vibrating wire stress gauge and resistance strain gauge group) set at the rotation monitoring point; determine the preset rotation state vector based on the virtual monitoring coordinate information, the preset attitude angle, the preset stress value and the preset strain value; determine the actual rotation state vector based on the actual monitoring coordinate information, the actual attitude angle, the actual stress value and the actual strain value; evaluate the safety status of the bridge during the rotation process according to the monitoring priority, the preset rotation state vector and the actual rotation state vector, and determine the rotation safety factor.

[0044] According to one embodiment of the present invention, step S657 includes: determining the rotation safety factor at the i-th moment of the monitoring period according to formulas (3), (4) and (5): , (3), (4), (5), Among them, min is the minimum function, is the second piecewise function, is the third piecewise function, is the actual monitoring coordinate information of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual attitude angle of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual stress value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual strain value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual rotation state vector of the rth rotation monitoring point at the i-th moment of the monitoring period, for The transposed vector of is the virtual monitoring coordinate information of the rth rotation monitoring point at the i-th moment of the monitoring cycle, The preset attitude angle of the rth rotation monitoring point at the i-th moment of the monitoring period, is the preset stress value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the preset strain value of the rth rotation monitoring point at the i-th moment of the monitoring period, The preset rotation state vector of the rth rotation monitoring point at the i-th moment of the monitoring period, is the monitoring priority of the rth rotation monitoring point, is the preset monitoring priority threshold, R is the number of rotation monitoring points, r≤R, and both r and R are positive integers.

[0045] According to one embodiment of the present invention, is the cosine similarity between the actual rotation state vector of the r-th rotation monitoring point at the i-th moment of the monitoring period and the preset rotation state vector. The greater the cosine similarity, the closer the coordinates, attitude angle, stress value and strain value of the r-th rotation monitoring point at the i-th moment of the monitoring period are to the preset situation, and the higher the rotation safety reflected by the r-th rotation monitoring point. In formula (4), the second piecewise function The value of includes the following two cases: When , it means that the rotation state of the rth rotation monitoring point at the i-th moment of the monitoring period is exactly the same as the preset rotation state, and the value of the second piecewise function is 1. When , it means that the rotation state of the rth rotation monitoring point at the i-th moment of the monitoring period is different from the preset rotation state, and the value of the second piecewise function is .

[0046] According to one embodiment of the present invention, in formula (5), the third piecewise function The value of includes the following two cases: When , it means that the monitoring priority of the rth rotation monitoring point is higher. It can be set to 4 levels, and the value of the third piecewise function is , The relative difference between the monitoring priority of the r-th rotation monitoring point and the preset monitoring priority threshold. The larger the ratio, the higher the monitoring priority of the r-th rotation monitoring point. When the monitoring priority of the r-th rotation monitoring point is higher, the rotation posture of the monitoring point has a higher impact on the overall rotation of the bridge, and the higher the requirement for the rotation state of the position. When the monitoring priority of the r-th rotation monitoring point is higher, The larger the value The smaller the value of represents the weighted coefficient of the rotation safety reflected by the r-th rotation monitoring point determined according to the monitoring priority of the r-th rotation monitoring point, is the rotation safety of the rth rotation monitoring point after weighting by the weighting coefficient.

[0047] According to one embodiment of the present invention, in formula (3), It represents the minimum value of the rotation safety of R rotation monitoring points at the i-th moment in the monitoring period. The above minimum value processing can be used to determine whether there are rotation monitoring points with low rotation safety during the rotation process of the bridge.

[0048] In this way, the rotation safety factor can be determined based on the monitoring priority, the preset rotation state vector and the actual rotation state vector. During the calculation process, similarity calculation can be performed based on the actual rotation state vector and the preset rotation state vector, and the weighting coefficient can be determined based on the monitoring priority. The rotation state safety of the rotation monitoring point can be accurately analyzed based on the similarity and the weighting coefficient, thereby improving the accuracy of the rotation safety factor.

[0049] According to one embodiment of the present invention, in step S7, the operating data of the hydraulic system is acquired at multiple moments in the monitoring cycle.

[0050] For example, the operating data of the hydraulic system is obtained by setting sensors (such as temperature sensors, pressure sensors and ultrasonic level sensors) at preset locations (such as the main pump outlet and the oil tank).

[0051] According to one embodiment of the present invention, in step S8, a hydraulic system stability coefficient is determined based on the working data.

[0052] Figure 3 A schematic diagram exemplarily shows calculation of the stability coefficient of a hydraulic system according to an embodiment of the present invention.

[0053] According to one embodiment of the present invention, step S8 includes: Step S81, determining the hydraulic oil temperature, hydraulic oil level and hydraulic system working pressure according to the working data; Step S82, obtaining the normal oil temperature, the warning oil temperature, and the stop oil temperature; Step S83, determining a hydraulic oil level stability recognition result according to the hydraulic oil level; Step S84, determining a hydraulic oil temperature safety identification result based on the hydraulic oil temperature, the normal oil temperature, the warning oil temperature, and the stop oil temperature; Step S85, determining a working pressure stability identification result based on the hydraulic system working pressure and the construction plan; Step S86: Determine the hydraulic system stability coefficient based on the hydraulic oil level stability identification result, the hydraulic oil temperature safety identification result, and the working pressure stability identification result.

[0054] For example, based on temperature sensors, pressure sensors and ultrasonic level sensors, the hydraulic oil temperature, hydraulic oil level and hydraulic system working pressure of the hydraulic system during the monitoring period are collected; according to the mandatory requirements of industry specifications, the normal oil temperature, warning oil temperature and stop oil temperature are determined, among which the normal oil temperature is set at 30 to 50 degrees Celsius, the warning oil temperature is set at 55 degrees Celsius, and the stop oil temperature is set at 60 degrees Celsius; according to the hydraulic oil level, the hydraulic oil level stability of the hydraulic system during the bridge rotation process is evaluated to determine the hydraulic oil level stability identification result; according to the hydraulic oil temperature, normal oil temperature, warning oil temperature and stop oil temperature, the safety status of the hydraulic oil temperature of the hydraulic system during the bridge rotation process is evaluated to determine the hydraulic oil temperature safety identification result, such as, when the hydraulic oil temperature is within the normal oil temperature range, When the hydraulic oil temperature is within the normal range, the hydraulic oil temperature safety identification result is 1, indicating that the hydraulic oil temperature of the hydraulic system is within the normal range. When the hydraulic oil temperature is greater than or equal to the warning oil temperature and less than the stop oil temperature, the hydraulic oil temperature safety identification result is 0, which will cause a small fluctuation in the system pressure and a deviation in the rotation speed. When the hydraulic oil temperature is greater than or equal to the stop oil temperature, the hydraulic oil temperature safety identification result is -1, which will cause a certain fluctuation in the system pressure and a large deviation in the rotation speed. According to the working pressure of the hydraulic system and the construction plan, the stability of the working pressure of the hydraulic system during the bridge rotation process is evaluated to determine the working pressure stability identification result. According to the sum of the hydraulic oil level stability identification result, the hydraulic oil temperature safety identification result and the working pressure stability identification result, the hydraulic system stability coefficient is determined.

[0055] According to one embodiment of the present invention, step S83 includes: Step S831, performing fitting based on the hydraulic oil level and the time in the current monitoring cycle to obtain a hydraulic oil level function of the hydraulic oil level in the current monitoring cycle; Step S832, determining a hydraulic oil level derivative function according to the hydraulic oil level function; Step S833, determining the hydraulic oil level change rate at multiple moments in the monitoring period according to the hydraulic oil level derivative function; Step S834, determining a hydraulic oil level change stability recognition result based on the hydraulic oil level change rate and a preset hydraulic oil level change rate threshold; Step S835: determining a hydraulic oil level safety identification result based on the hydraulic oil level and a preset hydraulic oil level threshold; Step S836: Determine a hydraulic oil level stability identification result based on the hydraulic oil level change stability identification result and the hydraulic oil level safety identification result.

[0056] For example, the hydraulic oil level and the moments in the monitoring period are fitted to obtain a hydraulic oil level function that is used to describe the law of change of the hydraulic oil level over time in the monitoring period; the hydraulic oil level function is differentiated to determine the hydraulic oil level derivative function; the moments in the monitoring period are substituted into the hydraulic oil level derivative function to determine the hydraulic oil level change rate at multiple moments in the monitoring period; according to the hydraulic oil level change rate and the preset hydraulic oil level change rate threshold, the change condition of the hydraulic oil level is evaluated to determine the stable recognition result of the hydraulic oil level change, wherein the preset hydraulic oil level change rate threshold is set according to the total height of the oil tank, which is 0.08% / h of the total height of the oil tank. For example, when the total height of the oil tank is 1m, the preset hydraulic oil level change rate threshold is 8mm / h. When the hydraulic oil level change rate is greater than or equal to the preset hydraulic oil level change rate threshold, the hydraulic oil level drop rate is too fast, which may be It can cause system decompression, and the hydraulic oil level change stability identification result is -1. When the hydraulic oil level change rate is less than the preset hydraulic oil level change rate threshold, the hydraulic oil level drop rate is normal, and the hydraulic oil level change stability identification result is 1; the preset hydraulic oil level threshold can be set to 80% of the total height of the oil tank. When the hydraulic oil level is less than the preset hydraulic oil level threshold, it means that the hydraulic oil level is low, which may be a precursor to hydraulic system loss of control, and the hydraulic oil level change stability identification result is -1; when the hydraulic oil level change stability identification result and the hydraulic oil level safety identification result are both 1, the hydraulic oil level stability identification result is 1. When there is an item of -1 in the hydraulic oil level change stability identification result and the hydraulic oil level safety identification result, the hydraulic oil level stability identification result is -1, indicating that when the hydraulic oil level change condition and the hydraulic oil level are normal, the hydraulic oil level stability identification result is 1.

[0057] According to one embodiment of the present invention, step S85 includes: Step S851, determining the rotation phase corresponding to the moment of the current monitoring period according to the construction plan; Step S852, determining the pressure fluctuation tolerance corresponding to the rotation stage; Step S853, determining working pressure fluctuation according to the working pressure of the hydraulic system; Step S854, determining a working pressure fluctuation stability identification result based on the working pressure fluctuation and the pressure fluctuation tolerance corresponding to the rotation stage; Step S855: determining a working pressure safety identification result based on the hydraulic system working pressure and a preset hydraulic system working pressure threshold; Step S856: Determine a working pressure stability identification result based on the working pressure fluctuation stability identification result and the working pressure safety identification result.

[0058] For example, according to the construction plan, the stage of the bridge rotation process at the current moment is determined (such as the uniform rotation stage, the start-stop stage); the first difference is determined based on the absolute value of the hydraulic system working pressure at the current moment minus the hydraulic system working pressure at the previous moment, and the working pressure fluctuation is determined based on the ratio of the first difference and the hydraulic system working pressure at the previous moment; the pressure fluctuation tolerance corresponding to each rotation stage is determined, such as the pressure fluctuation tolerance corresponding to the uniform rotation stage is 3%, and the pressure fluctuation tolerance corresponding to the start-stop stage is 5%; if the working pressure fluctuation is greater than or equal to the pressure fluctuation tolerance corresponding to the rotation stage, it means that the working pressure fluctuation of the hydraulic system is too large, resulting in irreversible structural damage to the bridge during the rotation process, and the working pressure fluctuation stability identification result is -1. If the working pressure fluctuation is less than the pressure fluctuation tolerance corresponding to the rotation stage, it means that the working pressure fluctuation of the hydraulic system is within the normal range. The working pressure fluctuation stability identification result is 1; the preset hydraulic system working pressure threshold can be set to 85%-90% of the rated working pressure of the hydraulic system. When the hydraulic system working pressure is greater than or equal to 1.1 times the preset hydraulic system working pressure threshold, it may cause the hydraulic system to fail, and the working pressure safety identification result is -1. When the hydraulic system working pressure is less than 1.05 times the preset hydraulic system working pressure threshold, it indicates that no overpressure occurs, and the working pressure safety identification result is 1; when the working pressure fluctuation stability identification result and the working pressure safety identification result are both 1, the working pressure safety identification result is 1. When there is an item of -1 in the working pressure fluctuation stability identification result and the working pressure safety identification result, the working pressure safety identification result is -1, indicating that when the working pressure fluctuation and the working pressure are both within the normal range, the working pressure stability identification result is 1.

[0059] According to one embodiment of the present invention, in step S9, a full-site monitoring report is determined based on the construction safety factor and the hydraulic system stability factor.

[0060] For example, when the construction safety factor is less than 2, it indicates a safety hazard and a corresponding alarm message is generated. When the hydraulic system stability factor is less than 3, it indicates an abnormality in the hydraulic system operation and a corresponding alarm message is generated. A bridge rotation monitoring platform is built based on the Web using the B / S architecture. With the sensor + 485 bus + DTU + cloud storage + Internet of Things + WEB terminal (BIM model + data visualization) as the framework, the dynamic BIM model, hydraulic system working data, environmental data, construction safety factor and hydraulic system stability factor as well as the generated alarm information are integrated into the same interface.

[0061] According to the method for full-field monitoring of the entire bridge rotation process using three-dimensional visualization according to an embodiment of the present invention, a dynamic BIM bridge model can be generated based on the design parameters and construction plan of the bridge, and the construction environment data and the working data of the hydraulic system at the construction site can be accurately collected. Based on the dynamic BIM bridge model and the construction environment data, the safety status of the bridge body during the rotation process can be accurately analyzed, and the construction safety factor can be determined. Based on the working data, the working safety status of the hydraulic system can be accurately analyzed, and the stability factor of the hydraulic system can be determined. Furthermore, a bridge rotation monitoring platform can be built based on the Web using a B / S architecture, and the dynamic BIM model, the construction safety factor, and the hydraulic system stability factor can be integrated into the bridge rotation monitoring platform, which can improve the real-time and comprehensiveness of monitoring the entire bridge rotation process. When determining the settlement safety factor, the settlement safety factor is determined based on the settlement of the support point, the preset settlement difference threshold, the direction of the support point, the wind force level, the wind direction angle, and the rainfall. During the calculation process, the influence of rainfall and wind force data on the safety of settlement rate and the safety of uneven settlement conditions can be accurately analyzed. Furthermore, the settlement safety factor is determined based on the two aspects of settlement rate safety and uneven settlement conditions, thereby improving the comprehensiveness and accuracy of the settlement safety factor. When determining the rotation safety factor, the rotation safety factor can be determined based on the monitoring priority, the preset rotation state vector, and the actual rotation state vector. During the calculation process, a similarity operation can be performed based on the actual rotation state vector and the preset rotation state vector, and a weighting coefficient can be determined based on the monitoring priority. The rotation state safety of the rotation monitoring point is accurately analyzed based on the similarity and weighting coefficient, thereby improving the accuracy of the rotation safety factor.

[0062] Figure 4 A block diagram of a system for three-dimensional visualization of the entire bridge rotation process according to an embodiment of the present invention is shown as an example. The system includes: Construction information module, used to obtain the design parameters and construction plan of the bridge; A bridge model module, configured to generate a dynamic BIM bridge model based on the design parameters and the construction plan; A sampling setting module is used to set virtual sampling points at the virtual rotation key positions of the dynamic BIM bridge model and to set actual sampling points at the rotation key positions of the rotating bridge; A coordinate information module is used to obtain the actual coordinate information of the actual sampling points in a preset coordinate system at multiple moments during the monitoring period, and determine the virtual coordinate information of the virtual sampling points in the preset coordinate system based on the mapping relationship between the rotating bridge and the dynamic BIM bridge model, wherein the preset coordinate system is a coordinate system established based on a preset origin within the range of the rotating bridge; The environmental data module is used to obtain construction environment data of the construction site at multiple moments in the monitoring cycle; A safety factor module, configured to determine a construction safety factor based on the construction environment data, the construction plan, the actual coordinate information, and the virtual coordinate information; The working data module is used to obtain the working data of the hydraulic system at multiple moments in the monitoring cycle; a stability coefficient model, for determining a stability coefficient of the hydraulic system based on the working data; The monitoring report module is used to determine a full-site monitoring report based on the construction safety factor and the hydraulic system stability factor.

[0063] The present invention may be a method, an apparatus, a system and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for executing various aspects of the present invention.

[0064] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A three-dimensional visualization full-field monitoring method for the entire process of bridge rotation, characterized in that: include: Obtaining design parameters and a construction plan for the bridge; generating a dynamic BIM bridge model based on the design parameters and the construction plan; At the key positions of the virtual rotation of the dynamic BIM bridge model, virtual sampling points are set, and at the key positions of the rotation of the rotating bridge, actual sampling points are set; at multiple moments in the monitoring period, the actual coordinate information of the actual sampling points in the preset coordinate system is obtained, and according to the mapping relationship between the rotating bridge and the dynamic BIM bridge model, the virtual coordinate information of the virtual sampling points in the preset coordinate system is determined, wherein the preset coordinate system is a coordinate system established based on a preset origin within the range where the rotating bridge is located; at multiple moments in the monitoring period, the construction environment data of the construction site is obtained; according to the construction environment data, the construction plan, the actual coordinate information and the virtual coordinate information, the construction safety factor is determined; at multiple moments in the monitoring period, the working data of the hydraulic system is obtained; according to the working data According to the data, the hydraulic system stability coefficient is determined; according to the construction safety factor and the hydraulic system stability coefficient, a full-site monitoring report is determined; according to the construction environment data, the construction plan, the actual coordinate information and the virtual coordinate information, the construction safety factor is determined, including: according to the construction environment data, the rainfall and wind data are determined; according to the actual coordinate information, the actual support coordinate information of the rotation support point is determined; according to the actual coordinate information, the actual monitoring coordinate information of the rotation monitoring point is determined; according to the rainfall, the wind data and the actual support coordinate information, the settlement safety factor is determined; according to the actual monitoring coordinate information and the virtual coordinate information, the rotation safety factor is determined; according to the settlement safety factor and the rotation safety factor, the construction safety factor is determined.

2. The method for three-dimensional visualization of the entire bridge rotation process according to claim 1 is characterized in that: The settlement safety factor is determined based on the rainfall, the wind data and the actual support coordinate information, including: determining the wind level and wind direction based on the wind data; determining the support point settlement of the rotating support point based on the actual support coordinate information; determining the distance between support points and the direction between support points based on the actual support coordinate information; determining a preset settlement difference threshold based on the distance between support points; determining the wind direction angle based on the wind direction and the direction between support points; determining the settlement safety factor based on the support point settlement, the preset settlement difference threshold, the wind level, the wind direction angle and the rainfall.

3. The method for three-dimensional visualization of the entire bridge rotation process according to claim 2 is characterized in that: Determine the settlement safety factor according to the support point settlement, the preset settlement difference threshold, the wind force level, the wind direction angle and the rainfall, including: according to the formula , , determine the settlement safety factor at the i-th moment of the monitoring period , where max is the maximum value function, is the preset sedimentation rate threshold, is the rainfall at the i-th moment of the monitoring period, is the preset rainfall threshold, is the first piecewise function, is the settlement of the kth rotation support point at the i-th moment of the monitoring period, is the settlement of the j-th rotation support point at the i-th moment of the monitoring period, is the preset settlement difference threshold between the kth rotation support point and the jth rotation support point, is the wind force level at the i-th moment of the monitoring period, is the wind direction angle between the kth rotation support point and the jth rotation support point and the wind direction at the i-th moment of the monitoring period, is the preset wind force level threshold, K is the number of rotation support points, j≤K, k≤K, j, k and K are all positive integers.

4. The method for three-dimensional visualization of the entire bridge rotation process according to claim 1 is characterized in that: The rotation safety factor is determined according to the actual monitoring coordinate information and the virtual coordinate information, including: determining the monitoring priority of each rotation monitoring point according to the design parameters; obtaining the preset attitude angle, preset stress value and preset strain value of the rotation monitoring point according to the dynamic BIM bridge model at multiple moments in the monitoring period; determining the virtual monitoring coordinate information of the rotation monitoring point according to the virtual coordinate information; obtaining the actual attitude angle, actual stress value and actual strain value of the rotation monitoring point at multiple moments in the monitoring period; determining the preset rotation state vector according to the virtual monitoring coordinate information, the preset attitude angle, the preset stress value and the preset strain value; determining the actual rotation state vector according to the actual monitoring coordinate information, the actual attitude angle, the actual stress value and the actual strain value; and determining the rotation safety factor according to the monitoring priority, the preset rotation state vector and the actual rotation state vector.

5. The method for three-dimensional visualization of the entire bridge rotation process according to claim 4 is characterized in that: Determining the rotation safety factor according to the monitoring priority, the preset rotation state vector and the actual rotation state vector includes: according to the formula , , , determine the rotation safety factor at the i-th moment of the monitoring period , where min is the minimum function, is the second piecewise function, is the third piecewise function, is the actual monitoring coordinate information of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual attitude angle of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual stress value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual strain value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the actual rotation state vector of the rth rotation monitoring point at the i-th moment of the monitoring period, for The transposed vector of is the virtual monitoring coordinate information of the rth rotation monitoring point at the i-th moment of the monitoring cycle, The preset attitude angle of the rth rotation monitoring point at the i-th moment of the monitoring period, is the preset stress value of the rth rotation monitoring point at the i-th moment of the monitoring period, is the preset strain value of the rth rotation monitoring point at the i-th moment of the monitoring period, The preset rotation state vector of the rth rotation monitoring point at the i-th moment of the monitoring period, is the monitoring priority of the rth rotation monitoring point, is the preset monitoring priority threshold, R is the number of rotation monitoring points, r≤R, and both r and R are positive integers.

6. The method for three-dimensional visualization of the entire bridge rotation process according to claim 1 is characterized in that: Determine the hydraulic system stability coefficient based on the working data, including: determining the hydraulic oil temperature, the hydraulic oil level and the hydraulic system working pressure based on the working data; obtaining the normal oil temperature, the warning oil temperature and the stop oil temperature; determining the hydraulic oil level stability identification result based on the hydraulic oil level; determining the hydraulic oil temperature safety identification result based on the hydraulic oil temperature, the normal oil temperature, the warning oil temperature and the stop oil temperature; determining the working pressure stability identification result based on the hydraulic system working pressure and the construction plan; determine the hydraulic system stability coefficient based on the hydraulic oil level stability identification result, the hydraulic oil temperature safety identification result and the working pressure stability identification result.

7. The method for three-dimensional visualization of the entire bridge rotation process according to claim 6 is characterized in that: According to the hydraulic oil level, a stable identification result of the hydraulic oil level is determined, including: fitting according to the hydraulic oil level and the moment in the current monitoring cycle to obtain a hydraulic oil level function of the hydraulic oil level in the current monitoring cycle; determining a hydraulic oil level derivative function according to the hydraulic oil level function; determining the hydraulic oil level change rate at multiple moments in the monitoring cycle according to the hydraulic oil level derivative function; determining a stable identification result of the hydraulic oil level change according to the hydraulic oil level change rate and a preset hydraulic oil level change rate threshold; determining a safe identification result of the hydraulic oil level according to the hydraulic oil level and the preset hydraulic oil level threshold; determining a stable identification result of the hydraulic oil level according to the stable identification result of the hydraulic oil level change and the safe identification result of the hydraulic oil level.

8. The method for three-dimensional visualization of the entire bridge rotation process according to claim 6 is characterized in that: According to the hydraulic system working pressure and the construction plan, a working pressure stability identification result is determined, including: according to the construction plan, determining the rotation stage corresponding to the moment of the current monitoring period; determining the pressure fluctuation tolerance corresponding to the rotation stage; determining the working pressure fluctuation according to the hydraulic system working pressure; determining the working pressure fluctuation stability identification result according to the working pressure fluctuation and the pressure fluctuation tolerance corresponding to the rotation stage; determining the working pressure safety identification result according to the hydraulic system working pressure and a preset hydraulic system working pressure threshold; determining the working pressure stability identification result according to the working pressure fluctuation stability identification result and the working pressure safety identification result.

9. A three-dimensional visualization full-field monitoring system for the entire bridge rotation process for executing the method according to any one of claims 1 to 8, characterized in that: include: A construction information module is used to obtain the design parameters and construction plan of the bridge; a bridge model module is used to generate a dynamic BIM bridge model based on the design parameters and the construction plan; A sampling setting module is used to set virtual sampling points at the virtual rotation key positions of the dynamic BIM bridge model and to set actual sampling points at the rotation key positions of the rotating bridge; A coordinate information module is used to obtain the actual coordinate information of the actual sampling points in a preset coordinate system at multiple times during the monitoring period, and determine the virtual coordinate information of the virtual sampling points in the preset coordinate system based on the mapping relationship between the rotating bridge and the dynamic BIM bridge model, wherein the preset coordinate system is a coordinate system established based on a preset origin within the range of the rotating bridge; an environmental data module is used to obtain construction environment data of the construction site at multiple times during the monitoring period; The safety factor module is used to determine the construction safety factor based on the construction environment data, the construction plan, the actual coordinate information and the virtual coordinate information; the working data module is used to obtain the working data of the hydraulic system at multiple times in the monitoring cycle; the stability coefficient model is used to determine the stability coefficient of the hydraulic system based on the working data; the monitoring report module is used to determine the full-site monitoring report based on the construction safety factor and the hydraulic system stability coefficient.

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