A virtual-real combination construction method for rail transit engineering

Abstract

The present disclosure provides a method for combining virtuality and reality in construction of rail transit projects, including: the construction party uses the construction party's mobile terminal to take construction photos, loads corresponding models according to the construction photos, matches the construction photos and the corresponding models, and modifies the models according to the matching results; the design party scans the QR code atlas to load design data, retrieves the corresponding model, matches the design data and the corresponding model, and changes the design; the supervision party scans the QR code of the construction site, retrieves the corresponding model, and determines the rectification plan for the corresponding model; the construction party checks the changed design and the rectification plan, and adjusts the construction project according to the changed design and the rectification plan. The present disclosure is centered on the combination of virtuality and reality, loads the corresponding model based on the background cloud server, performs corresponding operations on the mobile terminal according to the corresponding model, assists in completing the construction, and has the advantage of convenient operation.

Description

Technical Field

[0001] The present disclosure relates to the field of track construction, and in particular to a virtual-real combined construction method for rail transit engineering. Background Art

[0002] With the development of urban construction in my country, the pace of urban rail construction has further accelerated. Most developed cities have established relatively complete rail transit systems. However, rail transit projects are expensive, require relatively limited space, and require high accuracy. Improving the precision of rail transit construction has become a pressing issue. Summary of the Invention

[0003] An embodiment of the present invention provides a virtual-reality combined construction method for rail transit projects, which focuses on the combination of virtual and reality, loads a corresponding model based on a background cloud server, performs corresponding operations on a mobile terminal according to the corresponding model, and assists in completing the construction, which has the advantage of convenient operation.

[0004] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0005] A virtual-real combination construction method for rail transit engineering, comprising:

[0006] The construction party first uses the construction party's mobile terminal to take construction photos, then loads the corresponding model into the rail transit construction visualization program based on the construction photos, then matches the construction photos and the corresponding model, and finally modifies the model in the rail transit construction visualization program based on the matching results;

[0007] The designer first uses their mobile terminal to scan the QR code in the atlas to load the design data, then retrieves the corresponding model produced by the construction party, matches the design data with the corresponding model, and finally changes the design in the rail transit construction visualization program;

[0008] The supervisor first uses the supervisor's mobile terminal to scan the construction site QR code, then retrieves the corresponding model produced by the construction party, and then determines the rectification plan for the corresponding model;

[0009] The construction party views the design change and rectification plan in the rail transit construction visualization program and adjusts the construction project accordingly.

[0010] In one possible implementation, loading the corresponding model in the rail transit construction visualization program based on the construction photos includes:

[0011] Generate basic information of rail transit projects and store it in the backend cloud server;

[0012] Create a 3D model corresponding to the construction photos and store it in the backend cloud server;

[0013] Create construction simulation animations corresponding to construction photos and store them in the backend cloud server;

[0014] The rail transit construction visualization program retrieves the three-dimensional models and construction simulation animations stored in the background cloud server.

[0015] In a possible implementation, modifying the model according to the matching result in the rail transit construction visualization program includes:

[0016] Build the current 3D model on the construction party's mobile terminal based on the construction progress data and perform curve fitting on the edge of the current 3D model;

[0017] The fitted 3D model curve is dynamically adjusted according to the running route of the construction simulation animation, and the adjustment data is uploaded to the backend cloud server;

[0018] Modify the corresponding model according to the adjustment data.

[0019] In a possible implementation, the method of using the mobile terminal of the designer to scan the QR code album to load the design data includes:

[0020] Upload the design data of rail transit projects to the backend cloud server;

[0021] Create and print a QR code atlas corresponding to the design data, and simultaneously create a 3D model corresponding to the QR code atlas and store it in the backend cloud server;

[0022] Prefabricate construction simulation animations based on design data and store them in the backend cloud server;

[0023] The designer uses the mobile terminal to scan the QR code atlas and load the corresponding 3D model and construction simulation animation.

[0024] In a possible implementation, retrieving the corresponding model produced by the construction party includes:

[0025] Use the rail transit construction visualization program on the designer's mobile terminal to scan pictures or QR codes in the atlas through image acquisition equipment, load the corresponding project model, and perform corresponding operations on the designer's mobile terminal to assist in the completion of construction.

[0026] In a possible implementation, determining a rectification plan for the corresponding model includes:

[0027] Correct and retrieve the corresponding model produced by the construction party to ensure that the corresponding model is correctly displayed near the origin of the rail transit construction visualization program, retrieve the model resource package in the corresponding model area and drag it to the corresponding model element list;

[0028] The corresponding model is aligned to the origin of the world coordinate system (x, z, y: 0, 0, 0) in the rail transit construction visualization program to determine the original viewpoint;

[0029] Click the general menu bar of the rail transit construction visualization program on the supervisor's mobile terminal to create a reference horizontal plane and a reference origin column;

[0030] Adjust the corresponding model so that the ground of the corresponding model and the reference horizontal plane coincide with each other and the origin column of the corresponding model is in the correct position.

[0031] In one possible implementation method, the corresponding model is to establish a virtual three-dimensional model of the construction project with BIM as the core. BIM uses digital technology to provide the background cloud server with a complete construction project information database that is consistent with the actual situation.

[0032] In a possible implementation, retrieving the corresponding model produced by the construction party includes:

[0033] Determine the intersection of the original curve in the corresponding model produced by the construction party, determine the deviation of the original curve based on the intersection, and output the curve deviation segment to the backend cloud server;

[0034] The original curve is identified and judged through the design data to avoid repeated positioning of the rail transit construction visualization program, and the supervision party and the design party use the rail transit construction visualization program to monitor the construction party's on-site construction based on the identification and judgment results.

[0035] The present disclosure has at least the following technical effects or advantages:

[0036] The embodiment of the present invention focuses on the combination of virtual and reality, loads the corresponding model based on the background cloud server, performs corresponding operations on the mobile terminal according to the corresponding model, and assists in completing the construction, which has the advantage of convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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 of the present invention or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A flowchart of a virtual-reality combined construction method for rail transit engineering provided according to some embodiments of the present disclosure;

[0039] Figure 2 A diagram illustrating a process of transforming a spatial point into a point on an image according to some embodiments of the present disclosure; DETAILED DESCRIPTION

[0040] The present disclosure is described in detail below with reference to the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present disclosure, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present disclosure.

[0041] The embodiments of the present disclosure provide a virtual-real combined construction method for rail transit engineering, comprising:

[0042] (1) The construction party first uses the construction party's mobile terminal to take construction photos, then loads the corresponding model in the rail transit construction visualization program based on the construction photos, then matches the construction photos and the corresponding model, and finally modifies the model in the rail transit construction visualization program according to the matching results.

[0043] The above-mentioned loading of corresponding models in the rail transit construction visualization program based on construction photos includes: generating basic information of the rail transit project and storing it in the background cloud server; generating three-dimensional models corresponding to the construction photos and storing it in the background cloud server; generating construction simulation animations corresponding to the construction photos and storing it in the background cloud server; the rail transit construction visualization program calls the three-dimensional model and construction simulation animation stored in the background cloud server.

[0044] In actual applications, there are multiple mobile terminals of the construction party. Specifically, the mobile terminal of the construction party generates basic information of the rail transit project and stores it in the background server; the mobile terminal of the construction party produces and prints pictures and QR code atlases for scanning and tracking; the mobile terminal of the construction party simultaneously produces a three-dimensional model corresponding to the atlas, and sets, adjusts, renders and stores it in the background server; the mobile terminal of the construction party produces a construction simulation animation through the PC design terminal and stores it in the background server; the mobile terminal of the construction party displays a panoramic video of the construction plan and the corresponding three-dimensional panoramic video, and stores it in the background server; the mobile terminal of the construction party uses the rail transit construction visualization program on the mobile terminal to scan the pictures or QR codes in the atlas through the image acquisition device, loads the corresponding project model, and performs corresponding operations on the smart mobile terminal.

[0045] The mobile terminal of the embodiment of the present invention is a smart phone, and the image acquisition device is a camera. The sensor pictures include two-dimensional engineering drawings, pictures of electromechanical equipment, on-site building plans and QR codes. The rail transit construction visualization program is divided into modules such as viewing the overall model of the project, clicking to display / hide corresponding components, long pressing to view component model information, and taking screenshots and uploading. The engineering module is used to perform its functions in actual on-site construction, electromechanical equipment installation, pipeline laying, etc. The mobile terminal also imports the BIM three-dimensional information model established by different software for different projects and different professions into the background cloud server, and the background cloud server adjusts, maps, renders, creates interactive solutions and performs lightweight processing on the model, and then encodes the project and the corresponding scanned pictures or QR codes and uploads them to the background cloud server for storage.

[0046] The PC design end of the embodiment of the present invention includes a three-dimensional model building module, a virtual enhancement module and an interactive design module, and the three-dimensional model building module, the virtual enhancement module and the interactive design module communicate in sequence; the three-dimensional model building module, the virtual enhancement module and the interactive design module all communicate with the mobile end and the background cloud server; since the PC design end communicates with the background cloud server, the PC design end of the embodiment of the present invention also includes a virtual enhancement module, a three-dimensional model building module and a construction information integration module, and the virtual enhancement module, the three-dimensional model building module and the construction information integration module communicate in sequence, and the virtual enhancement module, the three-dimensional model building module and the construction information integration module all communicate with the mobile end and the background cloud server.

[0047] The backend cloud server includes a code scanning loading model and a reading cache model; the backend cloud server stores the data information of the sensor images and the rail transit construction visualization data. The code scanning loading model extracts the data information of the sensor images and the rail transit construction visualization data from the reading cache model and then loads them. The reading cache model retrieves the data information of the sensor images and the rail transit construction visualization data and caches them; the code scanning loading model and the reading cache model both communicate with the PC design section and the mobile terminal.

[0048] The above-mentioned modification of the model according to the matching results in the rail transit construction visualization program includes: building the current three-dimensional model on the construction party's mobile terminal according to the construction progress data and performing curve fitting on the edge of the current three-dimensional model; dynamically adjusting the model edge of the fitted three-dimensional model curve according to the running route of the construction simulation animation, and uploading the adjusted data to the background cloud server; and modifying the corresponding model according to the adjusted data.

[0049] The above corresponding model is based on BIM to establish a virtual three-dimensional model of the construction project. BIM uses digital technology to provide the background cloud server with a complete construction project information database that is consistent with the actual situation.

[0050] (2) The designer first uses the mobile terminal to scan the QR code atlas to load the design data, then retrieves the corresponding model produced by the construction party, and then matches the design data and the corresponding model, and finally changes the design in the rail transit construction visualization program.

[0051] The above-mentioned use of the designer's mobile terminal to scan the QR code album to load the design data includes: uploading the design data of the rail transit project to the background cloud server; producing and printing a QR code album corresponding to the design data, and at the same time producing a three-dimensional model corresponding to the QR code album and storing it in the background cloud server; prefabricating a construction simulation animation according to the design data and storing it in the background cloud server; using the designer's mobile terminal to scan the QR code album and load the three-dimensional model and construction simulation animation corresponding to the QR code album.

[0052] The drawing set of the embodiment of the present invention is printed with sensor images and QR codes; the terminal contains functions such as modification, material mapping, rendering, and AR interactive operation production of models exported from 3D modeling software; the background cloud server can store 3D models and data information of rail transit construction projects, and the rail transit construction visualization data includes the actual attribute data of the model, the model's mapping, construction precautions, the 2D drawings corresponding to the 3D model, and the 3D model mapping and QR codes matching the sensor images; the mobile terminal communicates with the background cloud server in a two-way manner, and transmits the data information of the sensor images to the background cloud server and obtains the rail transit construction visualization data; the smart mobile terminal is pre-installed with a rail transit construction visualization program, and the rail transit construction visualization program reads the QR code or the drawings to read the corresponding model and data stored in the background cloud server. The embodiment of the present invention combines the traditional rail transit project construction plan and develops a visualization system for rail transit project construction based on AR augmented reality technology.

[0053] The above-mentioned retrieval of the corresponding model produced by the construction party includes: using the rail transit construction visualization program on the designer's mobile terminal to scan the pictures or QR codes in the atlas through the image acquisition device, loading the corresponding engineering model, and performing corresponding operations on the designer's mobile terminal to assist in the completion of the construction.

[0054] The above corresponding model is based on BIM to establish a virtual three-dimensional model of the construction project. BIM uses digital technology to provide the background cloud server with a complete construction project information database that is consistent with the actual situation.

[0055] It should be noted that the rail transit construction visualization program of the embodiment of the present invention includes a PC-side design and generation system, a mobile-side virtual-reality viewing system and a cloud-based service management system; the PC-side design and generation system communicates with the cloud-based service management system, and the mobile-side virtual-reality viewing system communicates with the cloud-based service management system; the PC-side design and generation system is used to produce the model to be displayed, and the PC-side design and generation system includes a PC-side model import unit and a PC-side model processing unit, and both the PC-side model import unit and the PC-side model processing unit communicate with the cloud-based service management system and the mobile-side virtual-reality viewing system; the mobile-side virtual-reality viewing system is used to read and update the comparison of virtual content and actual content, and the mobile-side virtual-reality viewing system includes an image acquisition unit, an image processing unit and a virtual content update unit, and both the image acquisition unit, the image processing unit and the virtual content update unit communicate with the PC-side design and generation system and the cloud-based service management system.

[0056] The above-mentioned cloud service management system includes a code scanning loading model and a reading cache model; the cloud service management system stores data information of sensor images and rail transit construction visualization data, the code scanning loading model extracts the data information of sensor images and rail transit construction visualization data from the reading cache model and then loads it, and the reading cache model retrieves the data information of sensor images and rail transit construction visualization data and caches them; the code scanning loading model and the reading cache model both communicate with the PC-side design generation system and the mobile-side virtual-reality viewing system. The above-mentioned code scanning loading model includes a zoom adjustment module, a rotation adjustment module, a model adjustment module, a click model module, a hidden model module and a display model module; the zoom adjustment module, the rotation adjustment module, the model adjustment module, the click model module, the hidden model module and the display model module all exchange data with the reading cache model. The above-mentioned reading cache model includes a double-click viewing module, a model property module, a menu button module and a play animation module; the double-click viewing module, the model property module, the menu button module and the play animation module all exchange data with the code scanning loading model. Of course, the read cache model also includes the click to take a photo module, the screenshot button module, the click to record a video module, the record button module, the click to video module, the play button module and the 3D video module; the click to take a photo module, the screenshot button module, the click to record a video module, the record button module, the click to video module, the play button module and the 3D video module all exchange data with the scan code loading model.

[0057] (3) The supervisor first uses the supervisor’s mobile terminal to scan the QR code of the construction site, then retrieves the corresponding model produced by the construction party, and then determines the rectification plan for the corresponding model.

[0058] The above-mentioned rectification plan for determining the corresponding model includes: correcting and retrieving the corresponding model produced by the construction party, ensuring that the corresponding model is correctly displayed near the origin of the rail transit construction visualization program, retrieving the model resource package in the corresponding model area and dragging it to the corresponding model element list; aligning the corresponding model to the origin of the world coordinate system (x, z, y: 0, 0, 0) in the rail transit construction visualization program to determine the original viewpoint; clicking the general menu bar of the rail transit construction visualization program on the supervisor's mobile terminal, creating a reference horizontal plane, and creating a reference origin column; adjusting the corresponding model so that the ground of the corresponding model and the reference horizontal plane coincide with each other, and the origin column of the corresponding model is in the correct position.

[0059] In actual applications, the key to the mobile terminal operation of the rail transit visualization system based on AR technology in an embodiment of the present invention lies in the positioning of the device itself, and the AR based on picture marking has three main procedures: capturing images, image processing, and updating virtual content, among which image processing is the core. After the image processing is completed, the external parameters of the mobile terminal (Extrinsic, the transformation relationship between the mobile terminal coordinate system and the world coordinate system) are obtained, and then applied to the overlay layer of the preview screen (such as OpenGL or 3D engine environment), and the position of the virtual content is updated, completing the entire frame processing process, and then repeating this process continuously so that after the device moves, the virtual content is always displayed in the correct position.

[0060] For positioning on mobile devices used for image acquisition, mobile intrinsic calibration can be used. The imaging process on a mobile device can be viewed as transforming points in space into points on the image. If the effects of mobile device distortion are ignored, the entire transformation is linear. The goal of mobile intrinsic calibration is to find the parameters of this transformation (including distortion), allowing mathematical calculations to accurately characterize the imaging process on the mobile device.

[0061] The transformation model of mobile imaging is expressed as follows:

[0062]

[0063]

[0064] Where A is the mobile device's intrinsic parameter matrix, including the focal lengths fx and fy in the x and y directions and the image centers cx and cy. Spatial point M is first transformed to the device (mobile device) coordinate system (DCS) using the mobile device's extrinsic parameters [R|t], and then transformed to the image coordinate system (ICS) using the mobile device's intrinsic parameters A, resulting in an image at (u, v). Determining the mobile device's intrinsic parameters is called intrinsic calibration. These parameters are related to the mobile device's focal length and other parameters, and can typically be performed offline. Simply taking the same image from different angles can create a corrective action plan.

[0065] The above corresponding model is based on BIM to establish a virtual three-dimensional model of the construction project. BIM uses digital technology to provide the background cloud server with a complete construction project information database that is consistent with the actual situation.

[0066] The above-mentioned retrieval of the corresponding model produced by the construction party includes: judging the intersection of the original curve in the corresponding model produced by the construction party, judging the direction deviation of the original curve based on the intersection, and outputting the curve deviation segment to the background cloud server; identifying and judging the original curve through design data to avoid repeated positioning of the rail transit construction visualization program, and the supervision party and the design party use the rail transit construction visualization program to monitor the construction party's on-site construction according to the identification and judgment results.

[0067] (4) The construction party checks the design change and rectification plan from the rail transit construction visualization program and adjusts the construction project accordingly.

[0068] It should be noted that an environmental database is developed in the background cloud server of the embodiment of the present invention. The environmental database includes a natural environment model and a geological environment model. The natural environment model includes topography, landform, hydrological conditions and climatic conditions, and the geological environment model includes soil structure and soil quality.

[0069] The embodiment of the present invention collects dynamic construction data to a mobile terminal, inputs the dynamic construction data into a rail transit construction visualization program, and the rail transit construction visualization program vectorizes the dynamic construction data into vector data and transmits it to a backend server of the rail transit construction visualization program; the backend server reconstructs a dynamic construction image of the vector data through intersections and curve directions, and the mobile terminal and the backend server construct three-dimensional model data based on the vector data; the rail transit construction visualization program sorts the three-dimensional model data in real time, and performs curve fitting on the three-dimensional model data in the time sequence of the real-time dynamic construction data of the mobile terminal to obtain a fitting curve; the fitted three-dimensional model is animated according to the time sequence of the mobile terminal, so as to obtain an animation that highly matches the real-time construction of rail transit, thereby improving the dynamic visualization accuracy of the real-time construction of rail transit.

[0070] The materials database used by the construction party during construction includes basic raw material data and sub-item construction data. Sub-item construction data includes station subgrade construction data, building construction data, outdoor integrated pipeline construction data, station track construction data, and ancillary building and outdoor environment construction data. Station subgrade construction data includes foundation treatment construction data, embankment treatment construction data, subgrade treatment construction data, and cutting treatment construction data. Building construction data includes foundation construction data, main structure construction data, building decoration and renovation construction data, roof construction data, building water supply, drainage, heating and ventilation construction data, building electrical construction data, ventilation and air conditioning construction data, and elevator construction data. Outdoor integrated pipeline construction data includes water supply pipeline construction data, drainage pipeline construction data, cable tunnel construction data, cable trench construction data, cable trough construction data, compressed air pipeline construction data, and outdoor electrical construction data. Station track construction data includes integrated track bed construction data and conventional track construction data. Ancillary building and outdoor environment construction data includes roadbed construction data, pavement construction data, ancillary building construction data, ancillary plaza construction data, and ancillary sidewalk construction data. The material database for station roadbed construction data corresponds to basic raw materials including earth and stone, steel bars, and concrete. The material database for station track construction data corresponds to basic raw materials including rails, gravel, concrete, switches, fasteners, signal signs, and warning signs. The material database for ancillary building and outdoor environment construction data corresponds to basic raw materials including earth and stone, gravel, curbstones, steel bars, concrete, metal wires, cables, cable trays, lighting fixtures, grounding devices, pipes, sanitary fixtures, air ducts, and fans. Prefabricated module data includes prefabricated wall modules, prefabricated floor modules, prefabricated roof modules, and prefabricated support modules. The modular assembly material database for outdoor integrated pipeline construction data corresponds to prefabricated pipe segment modules and prefabricated piping system modules. Construction equipment data includes transport machinery, lifting machinery, module hoisting machinery, module assembly machinery, and lifting machinery.

[0071] The embodiment of the present invention focuses on the combination of virtual and reality, loads the corresponding model based on the background cloud server, performs corresponding operations on the mobile terminal according to the corresponding model, and assists in completing the construction, which has the advantage of convenient operation.

[0072] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present disclosure. They are not intended to limit the scope of protection of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the scope of protection of the present disclosure.

[0073] It will be apparent to those skilled in the art that the present disclosure is not limited to the details of the exemplary embodiments described above and that the present disclosure can be implemented in other specific forms without departing from the spirit or essential characteristics of the present disclosure. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present disclosure is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present disclosure. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0074] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A virtual-real combination construction method for rail transit engineering, characterized in that: include: The construction party first uses the construction party's mobile terminal to take construction photos, then loads the corresponding model into the rail transit construction visualization program based on the construction photos, then matches the construction photos and the corresponding model, and finally modifies the model in the rail transit construction visualization program based on the matching results; The designer first uses their mobile terminal to scan the QR code in the atlas to load the design data, then retrieves the corresponding model produced by the construction party, matches the design data with the corresponding model, and finally changes the design in the rail transit construction visualization program; The supervisor first uses the supervisor's mobile terminal to scan the construction site QR code, then retrieves the corresponding model produced by the construction party, and then determines the rectification plan for the corresponding model; The construction party views the design change and rectification plan in the rail transit construction visualization program and adjusts the construction project accordingly.

2. The virtual-real combined construction method for rail transit engineering according to claim 1, characterized in that: The step of loading the corresponding model into the rail transit construction visualization program according to the construction photos includes: Generate basic information of rail transit projects and store it in the backend cloud server; Create a 3D model corresponding to the construction photos and store it in the backend cloud server; Create construction simulation animations corresponding to construction photos and store them in the backend cloud server; The rail transit construction visualization program retrieves the three-dimensional models and construction simulation animations stored in the background cloud server.

3. The virtual-real combined construction method for rail transit engineering according to claim 1 or 2, characterized in that: The step of modifying the model according to the matching result in the rail transit construction visualization program includes: Build the current 3D model on the construction party's mobile terminal based on the construction progress data and perform curve fitting on the edge of the current 3D model; The fitted 3D model curve is dynamically adjusted according to the running route of the construction simulation animation, and the adjustment data is uploaded to the backend cloud server; Modify the corresponding model according to the adjustment data.

4. The virtual-real combined construction method for rail transit engineering according to claim 1, characterized in that: The method of using the mobile terminal of the designer to scan the QR code album to load the design data includes: Upload the design data of rail transit projects to the backend cloud server; Create and print a QR code atlas corresponding to the design data, and simultaneously create a 3D model corresponding to the QR code atlas and store it in the backend cloud server; Prefabricate construction simulation animations based on design data and store them in the backend cloud server; The designer uses the mobile terminal to scan the QR code atlas and load the corresponding 3D model and construction simulation animation.

5. The virtual-real combined construction method for rail transit engineering according to claim 1 or 4, characterized in that: When the designer retrieves the corresponding model produced by the contractor, it specifically includes: Use the rail transit construction visualization program on the designer's mobile terminal to scan pictures or QR codes in the atlas through image acquisition equipment, load the corresponding project model, and perform corresponding operations on the designer's mobile terminal to assist in the completion of construction.

6. The virtual-real combined construction method for rail transit engineering according to claim 1, characterized in that: The rectification plan for determining the corresponding model includes: Correct and retrieve the corresponding model produced by the construction party to ensure that the corresponding model is correctly displayed near the origin of the rail transit construction visualization program, retrieve the model resource package in the corresponding model area and drag it to the corresponding model element list; The corresponding model is aligned to the origin of the world coordinate system (x, z, y: 0, 0, 0) in the rail transit construction visualization program to determine the original viewpoint; Click the general menu bar of the rail transit construction visualization program on the supervisor's mobile terminal to create a reference horizontal plane and a reference origin column; Adjust the corresponding model so that the ground of the corresponding model and the reference horizontal plane coincide with each other and the origin column of the corresponding model is in the correct position.

7. The virtual-real combined construction method for rail transit engineering according to claim 1, characterized in that: The corresponding model is based on BIM to establish a virtual three-dimensional model of the construction project. BIM uses digital technology to provide the background cloud server with a complete construction project information database that is consistent with the actual situation.

8. The virtual-real combined construction method for rail transit engineering according to claim 1, characterized in that: When the supervisor retrieves the corresponding model produced by the construction party, it specifically includes: Determine the intersection of the original curve in the corresponding model produced by the construction party, determine the deviation of the original curve based on the intersection, and output the curve deviation segment to the backend cloud server; The original curve is identified and judged through the design data to avoid repeated positioning of the rail transit construction visualization program, and the rail transit construction visualization program is used to monitor the construction party's on-site construction based on the identification and judgment results.

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