CN117376377A - Large-span arch bridge internet of things safety precaution monitoring system - Google Patents
Large-span arch bridge internet of things safety precaution monitoring system Download PDFInfo
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Abstract
The invention discloses a safety early warning and monitoring system of a large-span arch bridge internet of things, which comprises a cable hoisting unit, a construction monitoring terminal, an early warning terminal and construction monitoring equipment connected with the construction monitoring terminal; the construction monitoring equipment is used for acquiring real-time stress monitoring data of the cable hoisting unit, surrounding environment data and video data of the arch bridge in the arch bridge construction process and sending the data to the construction monitoring terminal; the construction monitoring terminal is used for running the bridge BIM model and displaying real-time stress monitoring data and surrounding environment data and video data of the arch bridge; and the BIM analyzes and judges the stress monitoring data, and if abnormal stress monitoring data occurs, the BIM sends the abnormal stress monitoring data to the early warning terminal for early warning prompt. The invention can monitor the hoisting construction of the large-span arch bridge in real time, and can judge and reduce the construction safety risk more accurately for the hoisting control parameters of the steel arch rib, thereby improving the installation precision of the steel arch rib of the large-span arch bridge.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a safety early warning and monitoring system of a large-span arch bridge through the Internet of things.
Background
Along with the strong development of traffic infrastructure, more and more large-span bridges are being built, the span of the large-span arch bridge is large, the ultra-high pier and live load are larger, the design time speed is high, and correspondingly, the requirements on bridge construction control indexes are high. At present, most of highway and high-speed railway large-span arch bridge constructions are in mountain canyon areas, microcurrent climates are obvious, extreme weather is frequent, and the weight and the length of each part (cable crane, cable-stayed buckle and the like) structure of the span arch bridge are large in the hoisting construction process; thus, the problems of unbalanced construction monitoring control precision, large safety risk of manual control and high monitoring labor cost are affected; therefore, the construction monitoring control of the large-span arch bridge becomes important, so that the construction investment is reduced and the construction safety is enhanced for realizing the quantitative monitoring of the construction monitoring, and the safety early warning monitoring system based on the Internet of things is provided for monitoring and controlling the construction supporting structure of the large bridge from the actual construction of the large-span bridge, so that the effective monitoring and management of the construction process are improved, and the smooth construction of the bridge is ensured.
Disclosure of Invention
The invention aims to provide a large-span arch bridge Internet of things safety early warning monitoring system, which can monitor the hoisting construction of a large-span arch bridge in real time, judge the hoisting control parameters of a steel arch rib more accurately, reduce the construction safety risk and improve the installation precision of the steel arch rib of the large-span arch bridge. In order to achieve the above purpose, the present invention adopts the following technical scheme:
according to one aspect of the invention, a large-span arch bridge Internet of things safety early warning and monitoring system is provided, and the early warning and monitoring system comprises a cable hoisting unit, a construction monitoring terminal, an early warning terminal and construction monitoring equipment connected with the construction monitoring terminal; the construction monitoring equipment is used for collecting real-time stress monitoring data of the cable hoisting unit and surrounding environment data and video data of the arch bridge in the arch bridge construction process, and sending the stress monitoring data and the surrounding environment data and video data of the arch bridge to the construction monitoring terminal; the construction monitoring terminal is used for running the bridge BIM model and displaying real-time stress monitoring data and surrounding environment data and video data of the arch bridge; and the BIM analyzes and judges the stress monitoring data, and if abnormal stress monitoring data occurs, the BIM sends the abnormal stress monitoring data to the early warning terminal for early warning prompt.
The above scheme is further preferable, wherein the construction monitoring terminal at least comprises a database server, an application server and a user data interface; the database server is in communication connection with the construction monitoring equipment by adopting a corresponding user data interface and the communication equipment of the Internet of things, and is used for receiving and storing stress monitoring data of the construction monitoring equipment; the application server is in communication connection with the database server, the application server creates and operates a BIM model through monitoring data information stored by the database server, analyzes and judges stress monitoring data through the BIM model, and sends abnormal stress monitoring data to the early warning terminal through a corresponding user data interface for early warning prompt.
The above scheme is further preferable, wherein the BIM model comprises a BIM module, an assembly simulation module, a BIM model database, a finite element module and a data verification module;
the BIM module is used for creating a three-dimensional structural model of the steel arch rib of the large-span arch bridge for the design parameter information of the large-span arch bridge construction; the assembly simulation module is used for carrying out hoisting fitting simulation training on all steel arch ribs of the large-span arch bridge, and recording and comparing hoisting paths of each section of steel arch ribs;
the BIM model database is used for acquiring stress monitoring data of each monitoring point in the steel arch hoisting process and hoisting construction position information of each section of steel arch;
the finite element module is used for analyzing and judging stress monitoring data and construction position information of each monitoring point in the steel arch rib hoisting project and determining an optimal hoisting construction parameter set;
the data verification module is used for comparing and verifying the design parameter information of the construction of the large-span arch bridge with the hoisting construction parameter set, if abnormal data exist, replacing the abnormal design parameter information with the corresponding hoisting construction parameters, feeding the replaced abnormal design parameter information back to the BIM module for repeated training until an optimal BIM model is obtained.
The BIM model further comprises a monitoring point coordinate module, wherein the monitoring point coordinate module is used for determining the longitude and latitude coordinate position of the steel arch rib according to the hoisting path of the steel arch rib and the stress monitoring data change condition of the monitoring point.
The above scheme is further preferable, the BIM further comprises a monitoring and early warning module, the monitoring and early warning module is used for analyzing and processing the abnormal data, and if the abnormal data exceeds the early warning boundary, early warning information is sent out.
The above solution is further preferred, wherein the user data interface includes a monitoring data interface, a geographic information interface, a video image interface, a voice communication interface, a network communication protocol interface, a BIM information interface, and a user extension interface.
The method for analyzing and judging the stress monitoring data and the construction position information of each monitoring point in the steel arch rib hoisting project further preferably comprises the following steps:
under the condition of preset construction parameters, acquiring current hoisting position information and stress measurement data of the steel arch rib by using construction monitoring equipment through monitoring points of a cable hoisting unit, wherein the preset construction parameters comprise weather environment preset parameters, stress preset parameters of each monitoring point in the hoisting process and position information of the steel arch rib during hoisting;
judging whether the stress monitoring data of each section of steel arch rib in the hoisting process deviate from preset construction parameters or not, and resetting a hoisting correction value through a cable hoisting unit if the stress monitoring data deviate from the preset construction parameters;
and feeding back the hoisting correction value, the position information and the stress change measurement data to a BIM model for analysis, and correcting construction parameters in the hoisting construction process of the steel arch rib structure according to the analysis result until the closure of the steel arch rib structure rib is completed.
According to the scheme, the optimal monitoring points of the cable hoisting units distributed and arranged at different positions are obtained in different construction paths according to the hoisting construction environment of the steel arch rib, and the position information and the stress measurement data of the current hoisting of the steel arch rib are obtained at the optimal monitoring points of the cable hoisting units.
The scheme is further preferable, and the cable hoisting unit mainly comprises a cable tower supporting structure, a main cable, a buckling cable, an anchor cable and a hanging buckle monitoring point.
In summary, the invention adopts the technical scheme, and has the following technical effects:
(1) The early warning monitoring system can monitor the hoisting construction of the large-span arch bridge in real time, judge and estimate the hoisting control parameters of the steel arch ribs more accurately, and adjust the assembly of the steel arch ribs correspondingly according to specific actual environment parameters, so that the on-site construction control is guided efficiently and conveniently, the construction safety risk is reduced, and the installation precision of the steel arch ribs of the large-span arch bridge is improved.
(1) The early warning monitoring system combines the Internet of things and the BIM technology to realize the measurement monitoring of the construction supervision of the large-span arch bridge, and performs finite element analysis calculation and adjustment of the optimal construction monitoring scheme according to the actual construction state of the large-span arch bridge, thereby controlling the line shape and hoisting construction position of each section of steel arch rib so as to make more accurate judgment and assembly, further ensuring the smooth implementation of the actual construction and providing the accuracy of the assembly of the steel arch rib of the large-span arch bridge.
Drawings
FIG. 1 is a system schematic diagram of a large span arch bridge Internet of things safety precaution monitoring system of the present invention;
FIG. 2 is a schematic diagram of a cable stayed model of the large span arch bridge of the present invention;
FIG. 3 is a schematic diagram of a BIM model of the present invention;
in the drawing, a large-collapse steel arch rib model 1, a boundary pier 2, an anchor cable anchorage 3, a buckling tower 4, a cable tower foundation 5, a formal buckling cable 6, a temporary buckling cable 7, a rear anchor cable 7a, a tensioning platform 8, a side wind cable anchorage 9 and a main cable 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and by illustrating preferred embodiments. It should be noted, however, that many of the details set forth in the description are merely provided to provide a thorough understanding of one or more aspects of the invention, and that these aspects of the invention may be practiced without these specific details.
Referring to fig. 1 and 2, the safety early warning and monitoring system of the internet of things of the large-span arch bridge according to the invention comprises a cable hoisting unit, a construction monitoring terminal, an early warning terminal and construction monitoring equipment connected with the construction monitoring terminal; the construction monitoring equipment is used for collecting real-time stress monitoring data of the cable hoisting unit and surrounding environment data and video data of the arch bridge in the arch bridge construction process, and sending the stress monitoring data and the surrounding environment data and video data of the arch bridge to the construction monitoring terminal; the construction monitoring terminal is used for running a bridge BIM (building information modeling) model (system) and displaying real-time stress monitoring data as well as surrounding environment data and video data of the arch bridge; the BIM is used for analyzing and judging stress monitoring data, if abnormal stress monitoring data appear, the abnormal stress monitoring data are sent to the early warning terminal for early warning prompt, the early warning terminal can display real-time construction monitoring data and perform early warning prompt, the cable hoisting unit mainly comprises a cable tower supporting structure, a main cable 10, a buckling cable, an anchor cable and hanging buckling monitoring points, a large-collapse steel arch rib model 1, a cable tower supporting structure and the main cable 10 are established according to a construction design drawing, the cable tower supporting structure mainly comprises a boundary pier 2 arranged on two sides of a gully, a buckling tower 4, an anchor cable anchor 3, a cable tower foundation 5 and a side wind cable anchor 9 are arranged on the boundary pier 2 and on the side of the main bridge, the buckling tower 4 consists of a concrete pier and a high-rise tower, a tensioning platform 8 is arranged on the top surface of the buckling tower 4 (cable tower), and an anchor hole is formed in the tensioning platform 8; the buckling cables and the anchor cables are mainly formal buckling cables 6 and temporary buckling cables 7 which are arranged according to the structural size characteristics of the steel arch rib 1, the formal buckling cables 6 and the temporary buckling cables 7 are arranged between the steel arch rib 1 and the buckling tower 4, rear anchor cables 7a are arranged between the anchor cable anchorage 3 and the buckling tower 4 and between the cable tower foundation 5 and the buckling tower 4, wherein the hanging buckling monitoring points are four surface stress meters (four hanging buckling monitoring points) arranged on the bottom cross section of the buckling tower 4 (boundary pier), two stress meters (hanging buckling monitoring points) are arranged at the position of each buckling anchor cross section of the steel arch rib, and strain monitoring (hanging buckling monitoring points) on the surface of the buckling tower 4 adopts a sinusoidal surface strain gauge to acquire strain quantity change conditions; because the rigidity of the buckling tower 4 has larger difference, deformation data are inconsistent, and deviation monitoring needs to be carried out on the position of the junction pier capping beam and the tower top at the same time. The accuracy of the deviation of the buckling tower is 1mm, and the monitoring frequency is preferably 20-30 s each time; when the anchorage system is in sliding or deviating once under the tensile force of the formal buckling rope 6 and the temporary buckling rope 7, serious consequences can be generated on the whole buckling tower system, namely the whole arch bridge temporary structure, and the whole process of the sliding of the rear anchor of the formal buckling rope 6 is monitored. The slip monitoring of the rear anchor mainly depends on a stay wire sensor to carry out slip measurement, 4 monitoring points (hanging buckle monitoring points) are arranged on each anchor, the accuracy of the slip monitoring points of the rear anchor is not lower than 1mm, and the monitoring frequency is preferably 20-30 s each time;
in the present invention, as shown in fig. 1 and 2, the construction monitoring terminal at least includes a database server, an application server and a user data interface; the user data interface comprises a monitoring data interface, a geographic information interface, a video image interface, a voice communication interface, a network communication protocol interface, a BIM information interface and a user expansion interface, and is used for realizing data docking and exchange, and realizing collaborative management of different users on construction of the large arch bridge and data docking and data interaction; the database server is in communication connection with the construction monitoring equipment by adopting a corresponding user data interface and the Internet of things communication equipment, and the dataThe database server is used for receiving and storing stress monitoring data of construction monitoring equipment, the construction monitoring equipment consists of various environment monitoring equipment, stress sensors and video monitoring equipment, and the construction monitoring equipment uploads the construction monitoring data of the large arch bridge to the database server of the construction monitoring terminal 。 The method comprises the steps of carrying out a first treatment on the surface of the The application server is in communication connection with the database server, the application server creates and operates a BIM model through monitoring data information stored by the database server, analyzes and judges stress monitoring data through the BIM model, sends abnormal stress monitoring data to the early warning terminal through a corresponding user data interface to perform early warning prompt, monitors the large arch bridge in real time through the combination of the BIM and the Internet of things and acquires construction monitoring data, so that the construction process is controlled and regulated, and the construction accuracy and reliability are greatly improved.
In the invention, as shown in combination with fig. 1 and 3, the BIM model comprises a BIM module, an assembly simulation module, a BIM model database, a finite element module, a data verification module, a monitoring point coordinate module and a monitoring and early warning module; wherein:
the BIM module is used for creating a three-dimensional structural model of the steel arch rib of the large-span arch bridge according to the design parameter information of the large-span arch bridge construction; the assembly simulation module is used for carrying out hoisting fitting simulation training on all steel arch ribs of the large-span arch bridge, and recording and comparing hoisting paths of each section of steel arch ribs; judging whether the steel arch rib is lifted or not by the lifting path, if yes, correcting the steel arch rib line according to the deviation, and performing fitting simulation training on the steel arch rib again to generate an optimal lifting construction drawing; fitting, verifying and assembling to be qualified, entering a next working procedure environment, and reducing the hoisting deviation precision of the steel arch rib so as to meet engineering design requirements;
the BIM model database is used for acquiring stress monitoring data of each monitoring point in the steel arch hoisting process and hoisting construction position information of each section of steel arch; the BIM model database is used for storing the monitoring data of each monitoring point, and provides a data support source for early warning monitoring; the finite element module is used for analyzing and judging stress monitoring data and construction position information of each monitoring point in the steel arch rib hoisting engineering, determining an optimal hoisting construction parameter set, determining corresponding sensors for arranging stress and strain monitoring positions after screening, finite element analysis and judgment processing are carried out according to data provided by the BIM model database, acquiring stress monitoring data and construction position information of each corresponding monitoring point in the steel arch rib hoisting process through the corresponding sensors, and judging the current hoisting position of the steel arch rib so as to ensure that hoisting has no deviation;
the data verification module is used for comparing and verifying design parameter information of the construction of the large-span arch bridge with the hoisting construction parameter set, if abnormal data exist, replacing the abnormal design parameter information with corresponding hoisting construction parameters, feeding the replaced abnormal design parameter information back to the BIM module for repeated training, and then feeding the replaced abnormal design parameter information to the finite element module for finite element analysis until an optimal BIM model is obtained; along with the change of the construction meteorological environment parameters in the hoisting construction process, the strain force of each monitoring point and the position of the steel arch rib are also changed; judging the strain parameter change of the current hanging and buckling monitoring point according to the strain force of the main cable and the position change parameter of the steel arch rib, mastering the strain force state of the main cable and the position change of the steel arch rib in real time, repeatedly performing adjustment and hoisting operation training, reducing the construction safety risk, enabling the bridge construction process to comprehensively cope with extreme weather and stress changes of mountain canyons, providing optimal basic early warning data for bridge construction and installation, and improving the hoisting accuracy of the steel arch rib of the large-collapse arch bridge;
the monitoring point coordinate module is used for determining the longitude and latitude coordinate position of the steel arch rib according to the hoisting path of the steel arch rib and the stress monitoring data change condition of the monitoring point, and if the longitude and latitude coordinate position has deviation, the longitude and latitude coordinate position needs to be calibrated, compared and corrected; in the hoisting path of each section of steel arch rib, the longitude and latitude coordinate position of the hoisting path of the steel arch rib is continuously changed under the influence of meteorological environment parameters, the precision of the steel arch rib construction process is difficult to ensure due to the deviation of the hoisting path and the position, and the installation position of each section of steel arch rib is different, if the hoisting path deviates from the pre-hoisting position, the hoisting path of the steel arch rib needs to be corrected, so that the calibration contrast and correction of the longitude and latitude coordinate position are completed;
the monitoring and early warning module is used for analyzing and processing abnormal data, and when the related data such as meteorological environment parameters, steel arch rib hoisting paths or stress monitoring data, longitude and latitude coordinate positions and the like are abnormal or exceed an early warning boundary, early warning information of abnormal stress monitoring is sent to the early warning terminal for early warning prompt;
in the embodiment of the invention, analyzing and judging the stress monitoring data and the construction position information of each monitoring point in the steel arch rib hoisting project comprises the following steps: under the condition of preset construction parameters, acquiring the current hoisting position information and stress measurement data of the steel arch rib by using construction monitoring equipment through monitoring points of the cable hoisting unit; judging whether the stress monitoring data of each section of steel arch rib in the hoisting process deviate from preset construction parameters or not, and resetting a hoisting correction value through a cable hoisting unit if the stress monitoring data deviate from the preset construction parameters; feeding back the hoisting correction value, the position information and the stress change measurement data to a BIM model for analysis, and correcting construction parameters in the hoisting construction process of the steel arch rib structure according to the analysis result until the closure of the steel arch rib structure rib is completed; in the embodiment of the invention, the preset construction parameters comprise weather environment preset parameters, stress preset parameters of each monitoring point in the hoisting process and position information of the steel arch rib during hoisting; the arch abutment, the bridge approach deck and the top of the cable tower are respectively provided with a meteorological observation station, which mainly observes parameters such as ambient temperature, humidity, wind speed, wind direction and the like, and carries out environmental monitoring on the whole construction range of the large-collapse arch bridge so as to cope with extreme weather of mountain canyons and provide basic meteorological data for construction and installation of the large bridge; the sports car on the main cable 10 is a main stress member of a steel arch rib, the sag of the main cable 10 is also continuously changed along with the change of hoisting, in the installation process, the sag of different cables is different due to construction deviation, so that the cable force of part of the cables is deviated, the strain force (cable force) of the main cable 10 is required to be dynamically monitored, the actual stress condition is known, the sensor used for monitoring the strain force (cable force or stress monitoring point stress condition) of the main cable 10 is a vibrating wire type sensor, and the strain force of the main cable 10 is obtained by measuring the frequency of the main cable 10 and the basic frequency for comparison analysis; the working state of the power source equipment is judged according to the change trend of the monitoring data by monitoring the strain force of the main cable 10, the working voltage, the current, the temperature and the vibration frequency of the power source equipment in real time, and the active intervention is timely carried out when the monitoring data are abnormal, so that the interruption or the motor damage in the hoisting process is avoided, and the risk is prevented; the Beidou positioning device is arranged on the top surface of each buckling tower 4 (cable tower), 2 mobile positioning stations are arranged on the top surface of each buckling tower 4 (cable tower), a reference positioning station is arranged on the ground, and Beidou positioning data are dynamically analyzed, so that deviation of the buckling towers 4 (cable towers) is obtained. The deviation monitoring frequency of the buckling tower 4 (cable tower) is 10s each time, the monitoring precision is 1cm, the hoisting position precision is dynamically corrected for ensuring the monitoring precision, and meanwhile, the precision is rechecked by a total station at regular intervals; when the on-site steel structure is hoisted, the influence of the current weather factors is great, the specific deviation condition of the sports car on the main cable 10 cannot be determined through video monitoring and optical measuring equipment, and when the high-altitude hoisting operation is performed, a big safety risk exists, beidou positioning equipment is arranged on the sports car for three-dimensional accurate positioning, and high-precision centimeter-level positioning is realized on the three-dimensional coordinates of the sports car; installing an AI camera on the sports car, collecting relevant video data such as the running of the main cable 10 and the dynamic tracking picture of the sports car, knowing the on-site hoisting condition, realizing the visual positioning of the steel arch rib, and sending out a warning notice when abnormality occurs, wherein the warning notice can be accurately positioned under the conditions of thick fog, severe weather or strong wind regulation so as to realize the datamation of the sports car position; the specific process of obtaining the position change parameters of the steel arch rib is that a Beidou positioning device is respectively arranged on the running vehicles on the upstream side and the downstream side of the main cable 10 and used for monitoring information such as the speed and the displacement of the running vehicle, when the steel arch rib is hung on the running vehicle to carry out hoisting construction, the Beidou positioning device is used for obtaining the position change of the steel arch rib in real time, and carrying out real-time positioning on the position of the running vehicle and obtaining the position information of the running vehicle, the position information of the current steel arch rib in hoisting is the position information of the current steel arch rib, the real-time position information of the running vehicle comprises the speed, the position, the relative displacement and the lifting height, the position information of the steel arch rib is analyzed according to the real-time position information of the running vehicle, and then the cable outlet quantity and the real-time position information of the running vehicle are measured, calibrated, compared and corrected, so that the accurate control and the dynamic display of the steel arch rib are realized, the synchronous precision of the running vehicles on the two sides is controlled within 5cm, and the precision and the position change of the steel arch rib construction process are ensured.
In the embodiment of the invention, as shown in fig. 1 and 2, according to the construction environment of hoisting the steel arch rib, the optimal monitoring points of each cable hoisting unit distributed and arranged at different positions are obtained in different construction paths, the position information and the strain monitoring data of the current hoisting of the steel arch rib are obtained at the optimal monitoring points of each cable hoisting unit, in the embodiment, the strain monitoring data of the current hoisting of the steel arch rib are obtained and comprise temperature change data, the position information comprises longitude and latitude coordinate position information (namely three-dimensional information of a sports car on a main cable) of the steel arch rib and position information of a steel arch rib line, and at least two temperature strain sensors are arranged on each end section of each section of the steel arch rib and are used for obtaining the temperature change parameters of the sections at two ends of the steel arch rib through the temperature strain sensors in the hoisting construction of each section of the steel arch rib; the steel arch rib is installed mainly for high-altitude construction, for reducing the security risk, high-altitude construction arranges and goes on in daytime, receives whole temperature rise and temperature gradient's influence very big, and accurate location can't be realized to the steel arch rib. The deformation in the construction process can be timely and intuitively evaluated by monitoring the temperatures of the sections at the two ends of the steel arch rib and predicting the influence of the temperatures on the deformation of the main arch in the construction process. According to the invention, the influence of temperature on the strain of the steel arch rib can be automatically corrected through the temperature of the temperature strain sensor to eliminate the position information of the hoisting position and the deviation of strain monitoring data, in the hoisting construction process of each section of the steel arch rib through the main cable according to the determined optimal monitoring point, the longitude and latitude coordinate position information and the shape line position of the steel arch rib are judged according to the temperature change parameters of the sections of the two ends of the steel arch rib, if the deviation occurs, the stress condition of the main cable is regulated, the strain force of the main cable is controlled according to the temperature change condition, so that the position and the longitude and latitude position of the steel arch rib are changed, the purpose of correcting the linear correction and the longitude and latitude position correction of the current steel arch rib is achieved, the influence of the temperature change on the linear change of the steel arch rib before and after the closure is minimized, the deviation of the steel arch rib is reduced, the construction assembly accuracy of a bridge is improved, the construction safety risk is reduced, the influence on the extreme weather of a mountain valley is reduced, the rapid and accurate hoisting construction is realized, and the installation accuracy is improved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The safety early warning and monitoring system comprises a cable hoisting unit, a construction monitoring terminal, an early warning terminal and construction monitoring equipment connected with the construction monitoring terminal; the construction monitoring equipment is used for collecting real-time stress monitoring data of the cable hoisting unit and surrounding environment data and video data of the arch bridge in the arch bridge construction process, and sending the stress monitoring data and the surrounding environment data and video data of the arch bridge to the construction monitoring terminal; the construction monitoring terminal is used for running the bridge BIM model and displaying real-time stress monitoring data and surrounding environment data and video data of the arch bridge; and the BIM analyzes and judges the stress monitoring data, and if abnormal stress monitoring data occurs, the BIM sends the abnormal stress monitoring data to the early warning terminal for early warning prompt.
2. The system of claim 1, wherein the construction monitoring terminal comprises at least a database server, an application server and a user data interface; the database server is in communication connection with the construction monitoring equipment by adopting a corresponding user data interface and the communication equipment of the Internet of things, and is used for receiving and storing stress monitoring data of the construction monitoring equipment; the application server is in communication connection with the database server, the application server creates and operates a BIM model through monitoring data information stored by the database server, analyzes and judges stress monitoring data through the BIM model, and sends abnormal stress monitoring data to the early warning terminal through a corresponding user data interface for early warning prompt.
3. The system of claim 1 or 2, wherein the BIM model comprises a BIM module, an assembly simulation module, a BIM model database, a finite element module and a data verification module;
the BIM module is used for creating a three-dimensional structural model of the steel arch rib of the large-span arch bridge according to the design parameter information of the large-span arch bridge construction; the assembly simulation module is used for carrying out hoisting fitting simulation training on all steel arch ribs of the large-span arch bridge, and recording and comparing hoisting paths of each section of steel arch ribs;
the BIM model database is used for acquiring stress monitoring data of each monitoring point in the steel arch hoisting process and hoisting construction position information of each section of steel arch;
the finite element module is used for analyzing and judging stress monitoring data and construction position information of each monitoring point in the steel arch rib hoisting project and determining an optimal hoisting construction parameter set;
the data verification module is used for comparing and verifying the design parameter information of the construction of the large-span arch bridge with the hoisting construction parameter set, if abnormal data exist, replacing the abnormal design parameter information with the corresponding hoisting construction parameters, feeding the replaced abnormal design parameter information back to the BIM module for repeated training until an optimal BIM model is obtained.
4. The internet of things safety precaution monitoring system of the large-span arch bridge according to claim 3, wherein the BIM model further comprises a monitoring point coordinate module, and the monitoring point coordinate module is used for determining the longitude and latitude coordinate position of the steel arch rib according to the hoisting path of the steel arch rib and the stress monitoring data change condition of the monitoring point.
5. The system of claim 3 or 4, wherein the BIM model further includes a monitoring and early warning module for analyzing abnormal data, and sending early warning information if the abnormal data exceeds an early warning boundary.
6. A system as claimed in claim 2, wherein the user data interface includes a monitoring data interface, a geographical information interface, a video image interface, a voice communication interface, a network communication protocol interface, a BIM information interface and a user extension interface.
7. The system of claim 2, wherein analyzing and determining the stress monitoring data and construction position information of each monitoring point in the steel arch lifting project comprises the following steps:
under the condition of preset construction parameters, acquiring current hoisting position information and stress measurement data of the steel arch rib by using construction monitoring equipment through monitoring points of a cable hoisting unit, wherein the preset construction parameters comprise weather environment preset parameters, stress preset parameters of each monitoring point in the hoisting process and position information of the steel arch rib during hoisting;
judging whether the stress monitoring data of each section of steel arch rib in the hoisting process deviate from preset construction parameters or not, and resetting a hoisting correction value through a cable hoisting unit if the stress monitoring data deviate from the preset construction parameters;
and feeding back the hoisting correction value, the position information and the stress change measurement data to a BIM model for analysis, and correcting construction parameters in the hoisting construction process of the steel arch rib structure according to the analysis result until the closure of the steel arch rib structure rib is completed.
8. The internet of things safety precaution monitoring system of the large-span arch bridge according to claim 7, wherein the optimal monitoring points of all cable hoisting units distributed and arranged at different positions are obtained in different construction paths according to the hoisting construction environment of the steel arch rib, and the position information and stress measurement data of the current hoisting of the steel arch rib are obtained at the optimal monitoring points of all cable hoisting units.
9. A large span arch bridge internet of things safety precaution monitoring system as recited in any one of claims 1 to 8 wherein the cable lifting unit is comprised primarily of a tower support structure, main cables, buckling cables, anchor cables and hanging buckling monitoring points.
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| CN117872938A (en) * | 2024-03-12 | 2024-04-12 | 贵州省公路建设养护集团有限公司 | Method and system for realizing equipment safety control under bridge construction based on Internet of things |
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