A method and system for improving the installation precision of a box girder of a bridge based on BIM technology

Abstract

The application discloses a method and system for improving box girder installation precision of a bridge erecting machine based on BIM technology, relates to the technical field of box girder installation of a bridge erecting machine, and comprises the following steps: acquiring wind speed and wind direction parameters of a construction area in real time; acquiring posture parameters of the box girder in real time, constructing a dynamic BIM model of the box girder, importing parameters, calculating installation positions of dynamic tension stabilizers connected with the box girder and installing the dynamic tension stabilizers, calculating dynamic tension parameters of the dynamic tension stabilizers on the box girder according to changes of the wind speed and wind direction parameters and the posture parameters in the dynamic BIM model of the box girder, combining operation parameters of the bridge erecting machine and parameters of the current dynamic tension stabilizers, synchronously driving the dynamic tension stabilizers, and tensioning the box girder by the dynamic tension stabilizers, so that the bridge erecting machine can keep accurate installation on the box girder in windy weather, and collision between the box girder and a pier or an installed box girder due to changes of the posture of the box girder can be avoided, and the structure of the box girder or the pier is not damaged.

Description

Technical Field

[0001] This invention relates to the field of bridge erecting machine box girder installation technology, specifically to a method and system for improving the installation accuracy of bridge erecting machine box girders based on BIM technology. Background Technology

[0002] With the rapid development of transportation infrastructure construction, bridge engineering, as an important component of the transportation network, has attracted widespread attention regarding its construction speed and quality. Bridge erecting machines, as one of the key pieces of equipment in bridge construction, are responsible for installing precast box girders onto bridge piers.

[0003] During the installation of box girders by the bridge erecting machine, the box girder is first lifted from the transport vehicle by the lifting device of the bridge erecting machine, then slowly moved to the designated installation position, and finally the position and angle of the bridge erecting machine are adjusted so that the box girder is placed on the bridge pier.

[0004] During the aforementioned installation process, although the bridge erecting machine can achieve precise installation of the box girder under normal circumstances, when the wind blows, the airflow causes additional torque and moment on the box girder, resulting in changes in its posture in the air. This swaying posture not only increases the difficulty of installation but may also lead to collisions between the box girder and the piers or other installed box girders, thereby damaging the structure of the box girder or piers. Summary of the Invention

[0005] This invention provides a method and system for improving the installation accuracy of box girders for bridge erection machines based on BIM technology. After collecting and analyzing the wind speed and direction in the construction area, a dynamic tension stabilizer connected to the box girder is used to stabilize the attitude of the box girder, solving the problem that the attitude change of the box girder when the wind blows increases the installation difficulty.

[0006] A method for improving the installation accuracy of box girder bridge erection machines based on BIM technology includes the following steps:

[0007] Real-time acquisition of wind speed and direction parameters in the construction area; and real-time acquisition of the attitude parameters of the box girder;

[0008] Construct a dynamic BIM model of the box girder that can realistically describe the construction process;

[0009] Import the wind speed, wind direction and attitude parameters obtained above into the dynamic BIM model of the box girder;

[0010] The installation location of the dynamic tension stabilizer connected to the box girder was calculated using the dynamic BIM model of the box girder without wind speed and direction parameters imported.

[0011] Dynamic tension stabilizers are installed at the above-mentioned installation locations and are detachably connected to the box girder.

[0012] During the process of the bridge erecting machine hoisting the box girder, based on the changes in wind speed and direction parameters and attitude parameters in the above-mentioned dynamic BIM model of the box girder, combined with the operating parameters of the bridge erecting machine and the current parameters of the dynamic tension stabilizer, the dynamic tension parameters of the dynamic tension stabilizer on the box girder are calculated.

[0013] The dynamic tension stabilizer is synchronously driven according to the dynamic tensioning parameters to tension the box girder, so as to maintain its posture stability during the installation process.

[0014] Furthermore, at least four dynamic tension stabilizers are provided. Each dynamic tension stabilizer includes a base, on which a winch is mounted. A steel cable is wound on the winch's reel, and one end of the steel cable is detachably connected to the bottom of the box girder.

[0015] Furthermore, the steps for obtaining wind speed and direction parameters in the construction area include:

[0016] Obtain parameters of the box girder and piers to construct a BIM model;

[0017] Several airflow sensors are installed around the periphery of the BIM model to ensure that the sensor network can cover the entire construction area where the bridge erecting machine lifts the box girder;

[0018] A simulation dynamic was constructed to calculate the number and location of airflow sensors required to maintain the data collection coverage.

[0019] Based on the above locations, airflow sensors are installed at the corresponding locations to capture wind speed and direction parameters in the construction area.

[0020] Furthermore, the box girder is equipped with attitude sensors to acquire the attitude parameters of the box girder.

[0021] Furthermore, calculating the installation location of the dynamic tension stabilizer connected to the box girder includes the following steps:

[0022] Obtain historical meteorological data for the construction area;

[0023] Apply the historical wind speed and direction parameters from the above data to the dynamic BIM model of the box girder;

[0024] The attitude of the box girder is detected;

[0025] Based on the changes in the box girder's posture and the positions of the connecting anchor points on the box girder, the positions of the dynamic tension stabilizers connected to the connecting anchor points are determined.

[0026] The simulation optimization removes some of the dynamic tension stabilizers, and outputs the installation positions of the remaining dynamic tension stabilizers.

[0027] Furthermore, the calculation process of the dynamic tensioning parameters of the box girder by the dynamic tension stabilizer includes:

[0028] Detect the wind load, direction, and attitude parameters of the box girder in the dynamic BIM model of the box girder;

[0029] Based on the wind load direction and attitude parameters, a dynamic tension stabilizer that can be used to control the attitude of the box girder was identified.

[0030] Calculate the tensioning parameters of the dynamic tension stabilizer based on the wind load, the operating parameters of the bridge erecting machine, and the current parameters of the dynamic tension stabilizer.

[0031] The tensioning parameters are output synchronously according to the time series to form dynamic tensioning parameters distributed according to the time series.

[0032] Furthermore, the connection anchor points on the box girder include threaded sleeves pre-embedded inside them. After the dynamic tension stabilizer is installed, one end of the steel cable is threadedly connected to the bottom threaded sleeve of the box girder through a screw shackle.

[0033] Secondly, embodiments of the present invention provide a system for improving the installation accuracy of bridge girder erection machines based on BIM technology, comprising:

[0034] The parameter acquisition unit, consisting of airflow sensors and attitude sensors, is suitable for real-time acquisition of wind speed and direction parameters in the construction area, as well as real-time acquisition of the attitude parameters of the box girder.

[0035] At least four dynamic tension stabilizers are connected to the box girder to control its attitude;

[0036] Parameter acquisition device, suitable for acquiring the operating parameters of dynamic tension stabilizers;

[0037] The controller is communicatively connected to the airflow sensor, attitude sensor, dynamic tension stabilizer, and parameter acquisition unit, and is suitable for controlling the dynamic tension stabilizer based on the data collected by the airflow sensor, attitude sensor, and parameter acquisition unit.

[0038] Furthermore, the controller includes an environment model construction module, a position calculation module, a force model calculation module, and a dynamic stabilization module;

[0039] The environment model building module is suitable for building a dynamic BIM model of the bridge box girder that can realistically describe the construction process based on the bridge's construction parameters, including the box girder model and the pier model.

[0040] The position calculation module is suitable for calculating the installation position of the dynamic tension stabilizer connected to the box girder.

[0041] The stress model calculation module is suitable for constructing a box girder wind load model based on data collected by airflow sensors and identifying stress characteristics;

[0042] The dynamic stabilization module attitude sensor is suitable for calculating the dynamic tensioning parameters of the box girder by the dynamic tension stabilizer based on the stress characteristics of the box girder and the data collected by the parameter acquisition device and attitude sensor, so as to maintain the attitude stability of the box girder during the installation process.

[0043] The beneficial effects of the above-mentioned technical solutions provided by the embodiments of the present invention include at least the following: the attitude of the box girder can be dynamically stabilized according to the wind speed and direction at the construction site, so as to maintain the stability of the box girder during the installation process, enabling the bridge erecting machine to maintain accurate installation of the box girder in windy weather, improving the accuracy of the existing bridge erecting machine in installing box girders in windy weather, and avoiding collisions between the box girder and the pier or the already installed box girder due to changes in the attitude of the box girder, thus avoiding damage to the structure of the box girder or the pier.

[0044] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0045] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0047] Figure 1 This is a flowchart of a method for improving the installation accuracy of a bridge girder using BIM technology, as disclosed in an embodiment of the present invention.

[0048] Figure 2 This is a schematic diagram of the system installation structure for improving the installation accuracy of bridge erecting machine box girders based on BIM technology, as disclosed in an embodiment of the present invention.

[0049] Figure 3 This is a schematic diagram of the structure of the dynamic tension stabilizer disclosed in an embodiment of the present invention;

[0050] Figure 4 This is a communication block diagram of a system for improving the installation accuracy of bridge girder box girders based on BIM technology, as disclosed in an embodiment of the present invention.

[0051] Figure label:

[0052] 1. Box girder; 2. Data acquisition unit; 21. Airflow sensor; 22. Attitude sensor; 3. Parameter acquisition unit; 4. Dynamic tension stabilizer; 41. Base; 42. Winch; 43. Steel cable; 5. Controller; 51. Environmental model construction module; 52. Position calculation module; 53. Force model calculation module; 54. Dynamic stabilization module. Detailed Implementation

[0053] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0054] The existing steps for installing box girder 1 using a bridge erecting machine include: 1. Transporting the prefabricated box girder 1 to the bridge erecting machine using a heavy-duty truck; 2. Connecting the bridge erecting machine to the box girder 1 through the reserved connection holes, and moving the box girder 1 to the installation position (the designed installation position on the pier); 3. After the box girder 1 is placed, disconnecting the bridge erecting machine from the box girder 1; repeating steps 1 to 3 to install the box girder 1.

[0055] In the existing installation process, the main impact of airflow is in step 2. After the bridge erecting machine lifts the box girder 1, the existing construction specifications require that the loading and transportation of the girder be stopped when the wind force is level 6 or above. When the box girder 1 is lifted under wind conditions that do not require stopping the operation, the box girder 1 will generate additional torque and torque under the action of airflow, which will cause the attitude of the box girder 1 to change in the air, resulting in problems with the difficulty in controlling the installation accuracy during the installation process (such as installation position deviation, collision between the box girder 1 and the bridge pier or the already installed box girder 1).

[0056] In order to maintain the accuracy of the installation of the box girder 1 by the bridge erecting machine in windy conditions, this embodiment of the invention provides a method and system for improving the installation accuracy of the box girder of the bridge erecting machine based on BIM technology.

[0057] The following text, in conjunction with the appendix Figures 1-4 The solution of the present invention will be described in detail below.

[0058] Figure 1 A flowchart illustrating a method for improving the installation accuracy of bridge girder erection machines based on BIM technology, as disclosed in an embodiment of the present invention, is shown, including:

[0059] S1, to obtain wind speed and direction parameters in the construction area in real time; and to obtain the attitude parameters of box girder 1 in real time.

[0060] The aforementioned wind speed and direction parameters are obtained by arranging several airflow sensors 21 around the perimeter. The specific methods of acquisition include:

[0061] S11, Obtain the parameters of box girder 1 and piers to construct a BIM model;

[0062] S12, Several airflow sensors 21 are arranged around the periphery of the above-mentioned BIM model to ensure that the sensor network can cover the entire construction area of ​​the bridge erecting machine hoisting the box girder 1;

[0063] S13, construct a simulation dynamic to perform simulation, and calculate the number and location of airflow sensors 21 required to maintain the collection coverage.

[0064] S14. Based on the above location and the airflow sensor 21 installed at the corresponding location, the wind speed and direction parameters of the construction area are captured.

[0065] S2, construct a dynamic BIM model of the box girder 1 that can realistically describe the construction process.

[0066] The constructed dynamic BIM model of the box girder 1, which realistically describes the construction process, includes the box girder 1 model and the pier model. The model is constructed based on the bridge's construction parameters.

[0067] S3. Import the wind speed and direction parameters and attitude parameters obtained above into the dynamic BIM model of the box girder 1.

[0068] After importing wind speed and direction parameters and attitude parameters into the dynamic BIM model of box girder 1, the box girder 1 model is driven to make corresponding attitude changes in accordance with the changes in wind speed and direction parameters.

[0069] S4. Calculate the installation position of the dynamic tension stabilizer 4 connected to the box girder 1 using the dynamic BIM model of the box girder 1 without importing wind speed and direction parameters.

[0070] S41, Calculating the installation position of the dynamic tension stabilizer 4 connected to the box girder 1 includes the following steps:

[0071] S42, acquire historical meteorological data for the construction area;

[0072] S43, apply the historical wind speed and direction parameters from the above data to the dynamic BIM model of box girder 1;

[0073] S44, Detect the attitude of box girder 1;

[0074] S45, based on the change in the attitude of box girder 1 and the position of the connecting anchor point set on box girder 1, set the position of the dynamic tension stabilizer 4 connected to the connecting anchor point;

[0075] S46, perform simulation optimization to remove part of the dynamic tension stabilizer 4, and output the installation position of the remaining dynamic tension stabilizer 4.

[0076] S5, Dynamic tension stabilizer 4 is installed at the above installation position and detachably connected to box girder 1.

[0077] like Figure 1 and 2 As shown, in one example, at least four dynamic tension stabilizers 4 are required. The dynamic tension stabilizer 4 includes a base 41, on which a winch 42 is provided. A steel cable 43 is wound on the winch of the winch 42, and one end of the steel cable 43 is detachably connected to the bottom of the box girder 1.

[0078] In order to achieve tensioning drive for box girder 1, during the manufacturing process of box girder 1, threaded sleeves need to be pre-embedded inside as its connection anchor points.

[0079] During the installation of box girder 1, after the dynamic tension stabilizer 4 is placed in the installation position, one end of the steel cable 43 is threadedly connected to the bottom threaded sleeve of box girder 1 through a screw shackle. After the box girder 1 is installed, the screw shackle is removed from the threaded sleeve on box girder 1, and concrete, sealant, sealing plates, etc. are used to seal the threaded sleeve.

[0080] S6. During the process of the bridge erecting machine hoisting the box girder 1, based on the changes in wind speed and direction parameters and attitude parameters in the dynamic BIM model of the box girder 1, combined with the operating parameters of the bridge erecting machine and the parameters of the current dynamic tension stabilizer 4, the dynamic tension parameters of the dynamic tension stabilizer 4 on the box girder 1 are calculated.

[0081] S61, the calculation process of the dynamic tensioning parameters of the box girder 1 by the static tension stabilizer includes:

[0082] S62, detect the wind load, direction, and attitude parameters of box girder 1 in the dynamic BIM model of box girder 1;

[0083] S63, based on the wind load direction and attitude parameters, a dynamic tension stabilizer 4 that can be used to control the attitude of box girder 1 is identified;

[0084] S64. Calculate the tensioning parameters of the dynamic tensioning stabilizer 4 based on the wind load, the operating parameters of the bridge erecting machine, and the current parameters of the dynamic tensioning stabilizer 4.

[0085] The operating parameters of the bridge erecting machine are used to identify the current and next actions of the bridge erecting machine, so that the operation of the dynamic tension stabilizer 4 can maintain the stability of the box girder 1 and keep it synchronized with the bridge erecting machine to avoid mutual interference.

[0086] The parameters of the dynamic tension stabilizer 4 are acquired by the parameter acquisition device 3 to identify the current operating parameters of the dynamic tension stabilizer 4 (tension force of steel cable 43, release length of steel cable 43). After calculation, the adjustment parameters of the dynamic tension stabilizer 4 (tension parameters of dynamic tension stabilizer 4) required to maintain the normal attitude of box girder 1 are obtained.

[0087] The normal posture of the box girder 1 mentioned above refers to the posture of the box girder 1 under the condition of no airflow interference. The parameter acquisition device 3 is connected to the control module of the winch 42 of the dynamic tension stabilizer 4 to collect the parameters of the dynamic tension stabilizer 4. The scheme adopted is the existing technology and will not be described in detail here.

[0088] S65, synchronously outputs tensioning parameters according to the time series to form dynamic tensioning parameters distributed according to the time series.

[0089] The dynamic tension stabilizer 4 performs tensioning actions sequentially according to the dynamic tensioning parameters.

[0090] S7, according to the dynamic tensioning parameters, synchronously drive the dynamic tensioning stabilizer 4 to tension the box girder 1 to maintain its stable posture during installation.

[0091] The aforementioned tensioning action includes the winch 42 of the dynamic tension stabilizer 4 winding up or unwinding the steel cable 43.

[0092] like Figures 2-4 As shown, a system for improving the installation accuracy of bridge girder box girders based on BIM technology includes:

[0093] The parameter acquisition unit 3, consisting of airflow sensor 21 and attitude sensor 22, is suitable for real-time acquisition of wind speed and direction parameters in the construction area; and real-time acquisition of attitude parameters of box girder 1, wherein attitude sensor 22 is installed on box girder 1.

[0094] At least four dynamic tension stabilizers 4 are connected to the box girder 1 to control the attitude of the box girder 1;

[0095] Parameter acquisition device 3 is suitable for acquiring the operating parameters of dynamic tension stabilizer 4;

[0096] The controller 5 is communicatively connected to the airflow sensor 21, the attitude sensor 22, the dynamic tension stabilizer 4, and the parameter acquisition unit 3, and is suitable for controlling the dynamic tension stabilizer 4 based on the data collected by the airflow sensor 21, the attitude sensor 22, and the parameter acquisition unit 3.

[0097] The signal output terminals of the bridge erecting machine, airflow sensor 21, attitude sensor 22, and parameter acquisition device 3 are connected to the signal input terminal of the controller 5. The signal output terminal of the controller 5 is connected to the signal input terminal of the winch 42 of the dynamic tension stabilizer 4. The signal output terminal of the winch 42 of the dynamic tension stabilizer 4 is connected to the signal input terminal of the parameter acquisition device 3.

[0098] The controller 5 is equipped with an environment model construction module 51, a position calculation module 52, a force model calculation module 53, and a dynamic stabilization module 54;

[0099] The environment model building module 51 is suitable for building a dynamic BIM model of the box girder 1 that can realistically describe the construction process based on the bridge's construction parameters, including the box girder 1 model and the pier model.

[0100] Position calculation module 52 is adapted to calculate the installation position of the dynamic tension stabilizer 4 connected to the box girder 1.

[0101] The stress model calculation module 53 is suitable for constructing a wind load model of the box girder 1 based on the data collected by the airflow sensor 21 and identifying the stress characteristics;

[0102] The dynamic stabilization module 54 and attitude sensor 22 are adapted to calculate the dynamic tensioning parameters of the dynamic tension stabilizer 4 on the box girder 1 based on the force characteristics of the box girder 1 and the data collected by the parameter acquisition device 3 and attitude sensor 22, so as to maintain the attitude stability of the box girder 1 during the installation process.

[0103] The technical solution provided by the embodiments of the present invention can dynamically stabilize the attitude of the box girder 1 according to the wind speed and direction at the construction site, so that the bridge erecting machine can maintain the precise installation of the box girder in windy weather, thereby maintaining the stability of the box girder 1 during the installation process. It can also avoid collisions between the box girder 1 and the pier or the already installed box girder 1 due to changes in the attitude of the box girder 1, thus preventing damage to the structure of the box girder 1 or the pier.

[0104] It should be noted that the specific models and specifications of the controller 5, airflow sensor 21, attitude sensor 22, winch 42, and parameter acquisition device 3 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0105] The power supply and operating principle of the controller 5, airflow sensor 21, attitude sensor 22, winch 42, and parameter acquisition unit 3 are clear to those skilled in the art and will not be described in detail here.

[0106] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0107] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0108] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.

[0109] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.

[0110] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.

[0111] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A method for improving the installation accuracy of box girder bridge erection machines based on BIM technology, characterized in that, Includes the following steps: The system acquires wind speed and direction parameters in the construction area in real time. The steps for acquiring these parameters include: constructing a BIM model of the box girder and piers; surrounding the BIM model with several airflow sensors to ensure the sensor network covers the entire construction area where the bridge erecting machine is hoisting the box girder; performing a simulation to calculate the required number and location of airflow sensors while maintaining coverage; capturing wind speed and direction parameters in the construction area based on the locations and the airflow sensors installed at those locations; and acquiring the box girder's attitude parameters in real time, with attitude sensors on the box girder used to acquire these parameters. Construct a dynamic BIM model of the box girder that can realistically describe the construction process; Import the wind speed, wind direction and attitude parameters obtained above into the dynamic BIM model of the box girder; The installation positions of the dynamic tension stabilizers connected to the box girder are calculated using a dynamic BIM model of the box girder without imported wind speed and direction parameters. The calculation of the installation positions of the dynamic tension stabilizers connected to the box girder includes the following steps: obtaining historical meteorological data of the construction area; applying the historical wind speed and direction parameters from the above data to the dynamic BIM model of the box girder; detecting the attitude of the box girder; setting the positions of the dynamic tension stabilizers connected to the connection anchors based on the changes in the box girder attitude and the positions of the connection anchors set on the box girder; performing simulation optimization to remove some dynamic tension stabilizers, and outputting the installation positions of the remaining dynamic tension stabilizers. Dynamic tension stabilizers are installed at the above-mentioned installation locations and are detachably connected to the box girder. At least four dynamic tension stabilizers are installed. Each dynamic tension stabilizer includes a base, a winch is installed on the base, and a steel cable is wound on the winch's winch. One end of the steel cable is detachably connected to the bottom of the box girder. During the hoisting of the box girder by the bridge erecting machine, based on the changes in wind speed, direction, and attitude parameters in the dynamic BIM model of the box girder, combined with the operating parameters of the bridge erecting machine and the current parameters of the dynamic tension stabilizer, the dynamic tension parameters of the dynamic tension stabilizer on the box girder are calculated. The calculation process for the dynamic tension parameters of the dynamic tension stabilizer on the box girder includes: detecting the wind load, direction, and attitude parameters of the box girder in the dynamic BIM model; identifying the dynamic tension stabilizer that can be used to control the attitude of the box girder based on the wind load direction and attitude parameters; calculating the tension parameters of the dynamic tension stabilizer based on the wind load, the operating parameters of the bridge erecting machine, and the current parameters of the dynamic tension stabilizer; and synchronously outputting the tension parameters according to the time series to form a dynamic tension parameter distribution according to the time series. The dynamic tension stabilizer is synchronously driven according to the dynamic tensioning parameters to tension the box girder, so as to maintain its posture stability during the installation process.

2. The method for improving the installation accuracy of bridge girder box girder based on BIM technology as described in claim 1, characterized in that, The connection anchor points on the box girder include threaded sleeves embedded inside them. After the dynamic tension stabilizer is installed, one end of the steel cable is threadedly connected to the bottom threaded sleeve of the box girder through a screw shackle.

3. A system for improving the installation accuracy of bridge girder box girders based on BIM technology, employing the method for improving the installation accuracy of bridge girder box girders based on BIM technology as described in any one of claims 1-2, characterized in that, include: The parameter acquisition unit, consisting of airflow sensors and attitude sensors, is suitable for real-time acquisition of wind speed and direction parameters in the construction area. And to collect the attitude parameters of the box girder in real time; At least four dynamic tension stabilizers are connected to the box girder to control its attitude; Parameter acquisition device, suitable for acquiring the operating parameters of dynamic tension stabilizers; The controller is communicatively connected to the airflow sensor, attitude sensor, dynamic tension stabilizer, and parameter acquisition unit, and is suitable for controlling the dynamic tension stabilizer based on the data collected by the airflow sensor, attitude sensor, and parameter acquisition unit.

4. The system for improving the installation accuracy of bridge girder erection machines based on BIM technology as described in claim 3, characterized in that, The controller is equipped with an environment model building module, a position calculation module, a force model calculation module, and a dynamic stabilization module; The environment model building module is suitable for building a dynamic BIM model of the bridge box girder that can realistically describe the construction process based on the bridge's construction parameters, including the box girder model and the pier model. The position calculation module is suitable for calculating the installation position of the dynamic tension stabilizer connected to the box girder; The stress model calculation module is suitable for constructing a box girder wind load model based on data collected by airflow sensors and identifying stress characteristics; The dynamic stabilization module attitude sensor is suitable for calculating the dynamic tensioning parameters of the box girder by the dynamic tension stabilizer based on the stress characteristics of the box girder and the data collected by the parameter acquisition device and attitude sensor, so as to maintain the attitude stability of the box girder during the installation process.

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