Earthwork management system and estimation method based on BIM model

Abstract

The present invention provides an earthwork management system and a rough calculation method based on a BIM model, comprising: a BIM model management module, which is used for updating and verifying a BIM three-dimensional model of the geometric shape and spatial relationship of earthwork in an earthwork project; a GIS model management module, which is used for generating a GIS model according to the geographic information data of the earthwork project; a vehicle transportation data management module, which is used for obtaining vehicle transportation output volume or backfill volume data; the GIS model management module sends the geographic information data of the earthwork project to the BIM model management module, and the BIM model management module is used for fusing and updating the geographic information data to the BIM three-dimensional model; the vehicle transportation data management module sends the acquired data to the BIM model management module, and the BIM model management module updates the BIM three-dimensional model. The present invention can accurately rough calculate the earthwork excavation output and backfill volume data, form real-time engineering progress data, facilitate management personnel to understand the construction progress, and realize refined process management.

Description

Technical Field

[0001] The present invention relates to the field of earthwork engineering, and in particular to an earthwork management system and a rough estimation method based on a BIM model. Background Art

[0002] Existing engineering construction involves excavation and filling. Commonly used methods include cross-section method, grid method, triangulation method, contour method, empirical formula and three-dimensional modeling method. The cross-section method is to estimate the total engineering quantity by measuring a series of cross-sections perpendicular to the excavation or filling direction and calculating the volume between these cross-sections. However, the cross-section method is only applicable to relatively regular shapes and is not very applicable. Both the grid method and the triangulation method construct regular grids and then use the grids to calculate the volume, but this method is more troublesome in practical application and relies on accurate measurements. For irregular shapes, it is difficult to achieve accurate calculations. The contour method uses the contour lines on the topographic map to convert them into cross-sections and then uses the cross-section method to calculate the volume, but this method requires accurate and detailed GIS data topographic maps, which is difficult to implement. The empirical formula method uses simplified formulas for calculations, which is suitable for relatively simple projects, but the calculation accuracy is low. The three-dimensional modeling method uses computer-aided modeling for calculations, with high accuracy and real-time feedback on the progress of the project, but the operation of this solution is difficult and difficult to implement. Chinese patent CN112765708A records a method, system, device and storage medium for calculating earthwork volume based on BIM, which obtains the original site terrain data, generates a three-dimensional surface model of the original site, creates a site leveling design surface model, and accurately calculates the required excavation and backfilling earthwork volume by comparing the original site three-dimensional surface model and the site leveling design surface model. However, the patent does not consider the problem of accurate division of data models for large or complex terrain data, nor does it consider the dynamic data of earthwork excavation and filling in actual construction and update the data model to achieve accurate process management. These factors make the rough estimate of earthwork volume inaccurate, making it difficult to achieve refined process management and difficult to use for displaying the project in the form of digital twins. Summary of the invention

[0003] The main purpose of the present invention is to provide an earthwork management system and a rough estimate method based on the BIM model to solve the problems of inaccurate earthwork quantity calculation and complex data model updating in the existing earthwork engineering construction.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an earthwork management system based on the BIM model, including a GIS model management module, a BIM model management module and a vehicle transportation data management module;

[0005] GIS model management module, used to generate GIS models based on geographic information data of earthwork projects;

[0006] BIM model management module, used for updating and verifying BIM 3D models of the geometric shapes and spatial relationships of earthworks in earthwork projects;

[0007] The BIM model management module includes an operation executor for updating the BIM three-dimensional model; the operation executor is used to add, delete and replace parts in the BIM three-dimensional model according to the data of the vehicle transportation data management module;

[0008] The BIM model management module also includes a fusion executor for fusion with the GIS model;

[0009] The fusion actuator is used to couple the key points of the BIM 3D model with the key points of the GIS model;

[0010] The coupling process includes: aligning the key points of the BIM 3D model with the key points of the GIS model, reading the vector data of the deflection angle, roll angle and pitch angle of the BIM 3D model, and aligning the vector data of the BIM 3D model with the vector data of the GIS model;

[0011] The vehicle transportation data management module includes vehicle transportation loading and unloading data. By collecting the real-time position data and loading status data of the vehicle transportation, the vehicle transportation loading and unloading data is obtained after joint solution, so as to obtain the output volume or backfill volume data of the vehicle transportation; the vehicle position data and the output volume or backfill volume data are input into the BIM three-dimensional model in real time, so as to update the BIM three-dimensional model;

[0012] The GIS model management module sends the geographic information data of the earthwork project to the BIM model management module, and the BIM model management module integrates and updates the geographic information data to the BIM three-dimensional model; the vehicle transportation data management module sends the acquired data to the BIM model management module, and the BIM model management module updates the BIM three-dimensional model.

[0013] In a preferred solution, when calculating through the fusion executor, the priority of the BIM three-dimensional model is set higher than the priority of the GIS model, so as to replace the data in the GIS model that interferes with the BIM three-dimensional model with the data of the BIM three-dimensional model.

[0014] In the preferred solution, the handheld terminal is bound to the vehicle, the position and direction of the handheld terminal are collected as the position and direction of the vehicle, the movement trajectory of the handheld terminal is collected as the movement trajectory of the vehicle, and the position, direction and movement trajectory of the vehicle are obtained in real time; the operation data of the vehicle is sent to the handheld terminal using the Internet of Things protocol, and the handheld terminal obtains the operation data of the current vehicle at the position; the vehicle transport output volume or backfill volume data is calculated and judged based on the operation data; the vehicle transport data management module adds the position data, and the output volume or backfill volume data to the current BIM three-dimensional model, or deletes it from the BIM three-dimensional model, or replaces part of the BIM three-dimensional model, to achieve real-time update of the BIM three-dimensional model.

[0015] In a preferred solution, the update of the BIM three-dimensional model adopts a particle algorithm to decompose the vehicle transportation output volume or backfill volume data into corresponding multiple particles; set the volume size of a single particle, update the particles corresponding to the output volume data and the backfill volume data, and complete the update of the BIM three-dimensional model.

[0016] In a preferred solution, the BIM model management module also includes a verification module for obtaining measured data of the construction site and comparing and verifying it with the BIM three-dimensional model data.

[0017] In a preferred solution, the BIM model management module further includes a display module for displaying corresponding data according to user instructions or preset instructions;

[0018] The displayed data includes one or more combinations of BIM three-dimensional model graphic data, GIS model data, fused graphic data, project progress data and earthwork quantity estimation data.

[0019] A method for rough calculation of earthwork for the earthwork management system based on the BIM model comprises the following steps:

[0020] S1. Generate a BIM three-dimensional model based on BIM data, where the BIM three-dimensional model includes the initial and final models of the earthwork construction area;

[0021] S2. Generate a three-dimensional model of the earthwork construction area based on GIS data, including the following steps:

[0022] The GIS model is divided into multi-scale grids according to the density of elevation data in different areas before the construction of the earthwork project.

[0023] In the earthwork construction area, the grid is encrypted;

[0024] S3, integrating the BIM 3D model with the GIS model, that is, coupling the key points of the BIM 3D model with the key points of the GIS model; the coupling includes aligning the key points of the BIM 3D model with the key points of the GIS model, reading the vector data of the deflection angle, roll angle and pitch angle of the BIM 3D model, and aligning the vector data of the BIM 3D model with the vector data of the GIS model;

[0025] During fusion calculation, the priority of the BIM 3D model is set higher than that of the GIS model, so that the data in the GIS model that interferes with the BIM 3D model can be replaced with the data in the BIM 3D model.

[0026] S4. Collect the real-time position data and loading status data of vehicle transportation, obtain the vehicle transportation loading and unloading data after joint solution, and input the vehicle transportation loading and unloading data into the BIM three-dimensional model in real time for updating the BIM three-dimensional model;

[0027] Bind the handheld terminal to the vehicle, collect the position and direction of the handheld terminal as the position and direction of the vehicle, collect the movement trajectory of the handheld terminal as the movement trajectory of the vehicle, and obtain the position, direction and movement trajectory of the vehicle in real time; use the Internet of Things protocol to send the vehicle's operation data to the handheld terminal, and the handheld terminal obtains the operation data of the current vehicle at the location; calculate and judge the vehicle's transport output volume or backfill volume data based on the operation data; add the position data and output volume or backfill volume data to the current BIM three-dimensional model, or delete it from the BIM three-dimensional model, or replace part of the BIM three-dimensional model to achieve real-time update of the BIM three-dimensional model;

[0028] S5. Compare the measured data with the model data. When the error is within the preset error range, the verification is passed; when the error exceeds the preset error range, the data is updated back-trackingly to track the formation of the error and correct the error.

[0029] In the preferred solution, in step S4, the specific steps of obtaining the output volume or backfill volume data are:

[0030] S401, binding the handheld terminal to the vehicle;

[0031] S402, obtaining vehicle direction and vehicle position data by the handheld terminal;

[0032] S403, introducing a time parameter to obtain a dynamic motion trajectory of the vehicle;

[0033] S411, synchronously with S402 and S403, collects loading and unloading cylinder control data, mechanical arm cylinder control data, weighbridge collection data and concrete out-of-warehouse data, and sends the data to the handheld terminal via the Internet of Things;

[0034] S412. Obtain output volume or backfill volume including time and position data according to the command data fed back by the handheld terminal and the vehicle dynamic trajectory.

[0035] In the preferred solution, the process of updating the BIM 3D model includes the following steps:

[0036] S421, dividing the filling and cutting area of ​​the integrated BIM 3D model into sections;

[0037] S422, particle-izing the fill-cut area, and particle-izing the output volume and the backfill volume;

[0038] That is, the excavation and filling area, output volume and backfill volume are decomposed into multiple particles, and the volume size of each particle is set, that is, the excavation and filling area, output volume and backfill volume are particle-ized;

[0039] S423, performing particle volume calculation on the fill-cut area according to the output volume or the backfill volume, and during the calculation process, setting boundary constraints of the fill-cut area according to specific construction conditions;

[0040] S424. Obtain earthwork estimate data through the above steps, and perform real-time addition, deletion or replacement operations on the BIM three-dimensional model.

[0041] In a preferred solution, in step S423, during the particle volume calculation process, when performing physical calculations, a single particle is a spherical particle, and calculations are performed within the boundary constraint range according to the physical properties of the spherical particle, and an alignment operation is performed so that the particles are not staggered and the axes of adjacent particles coincide;

[0042] When performing volume calculations, the volume calculation is performed based on the bounding rectangle of a single particle.

[0043] In a preferred solution, in step S4, the BIM three-dimensional model update is stored in a time slice manner, that is, the BIM three-dimensional model update operation is completed within a time period to trace the construction quality;

[0044] The time slices are cut into days or hours, and the operations in each time slice are regarded as an action set. In a single time slice, the BIM model management module executes all operations in an action set, thereby reducing the amount of data while tracing back.

[0045] The present invention provides an earthwork management system based on a BIM model, which has the following beneficial effects compared with the prior art: a solution of integrating a BIM three-dimensional model with a GIS is adopted to make up for the shortcomings of a single model, and a high-precision coupled three-dimensional model with complete terrain characteristics is obtained. The BIM three-dimensional model is updated according to the real-time position data and loading status data of vehicle transportation, and the updating method adopts a time slice method for storage, so as to facilitate the refined estimation of earthwork and the traceability of construction quality. The present invention can accurately estimate the earthwork excavation output and backfill volume data, can form real-time engineering progress data according to the vehicle transportation output volume or backfill volume data, and update the BIM model according to the engineering progress data, so as to facilitate management personnel to understand the construction progress, realize refined process management, and avoid the final construction result not meeting expectations. And it can optimize and adjust the design scheme at any time according to data feedback and construction progress, design changes, improve construction efficiency and construction quality, and shorten construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0047] Figure 1 It is a schematic diagram of the earthwork management system of the present invention.

[0048] Figure 2 It is a schematic diagram of the earthwork management method of the present invention.

[0049] Figure 3 It is a schematic diagram of the present invention for obtaining output volume or backfill volume data including time and position data.

[0050] Figure 4 It is a schematic diagram of the process of specifically estimating earthwork data and adding, deleting or updating the BIM three-dimensional model according to the present invention. DETAILED DESCRIPTION

[0051] Embodiment 1:

[0052] like Figure 1 As shown, a BIM-based earthwork management system includes: a GIS model management module, a BIM model management module and a vehicle transportation data management module;

[0053] GIS model management module, used to generate GIS models based on geographic information data of earthwork projects;

[0054] The BIM model management module is used to update and verify the BIM three-dimensional model of the geometric shape and spatial relationship of the earthwork in the earthwork project; in the preferred solution, the BIM model management module also includes an operation executor for updating the BIM three-dimensional model; the operation executor is used to add, delete and replace parts in the BIM three-dimensional model according to the data of the vehicle transportation data management module. The specific operation method is described in detail in the embodiment of the method.

[0055] The geometric shape of the BIM three-dimensional model includes the length, width and height data of the BIM three-dimensional model, and the spatial relationship includes the coordinate data and vector data of the key points in the BIM three-dimensional model.

[0056] The vehicle transportation data management module is used to obtain the vehicle transportation output volume or backfill volume data; in earthwork construction, it includes excavation construction and backfill construction, where the output volume data corresponds to excavation construction and the backfill volume data corresponds to backfill construction.

[0057] The GIS model management module sends the geographic information data of the earthwork project to the BIM model management module, which is used to integrate and update the geographic information data into the BIM three-dimensional model; the vehicle transportation data management module sends the acquired data to the BIM model management module, which updates the BIM three-dimensional model.

[0058] In a preferred solution, the BIM model management module also includes a fusion executor for fusion with the GIS model; the fusion executor is used to couple the key points of the BIM three-dimensional model with the key points of the GIS model.

[0059] In a preferred solution, the coupling process includes the operation of coinciding the key points of the BIM three-dimensional model with the key points of the GIS model. Read the vector data of the deflection angle, roll angle and pitch angle of the BIM three-dimensional model, and align the vector data of the BIM three-dimensional model with the vector data of the GIS model. Preferably, the coupling process includes coinciding the key points of the BIM three-dimensional model with the key points of the GIS model. The key points described in this example refer to the base surface of the BIM three-dimensional model, intercept a rectangular surface in the base surface, select the center line of the rectangular surface as the first reference line, and read the vector data of the deflection angle, roll angle and pitch angle of the first reference line of the BIM three-dimensional model. According to the corresponding base surface of the vector data, select the corresponding base surface in the GIS model, intercept the corresponding rectangular surface in the base surface, and use the corresponding center line as the second reference line of the GIS model. Align the vector data of the first reference line of the BIM three-dimensional model with the vector data of the second reference line of the GIS model. That is, the alignment of the BIM three-dimensional model and the GIS model is achieved.

[0060] The system of the present invention integrates the earthwork engineering data of the BIM three-dimensional model and the GIS model, solving the shortcomings of each model. That is, the existing BIM three-dimensional model usually only involves the model of the building after construction, lacks construction process data, and the content involved in the data is mainly related to the building, and fails to comprehensively feedback the characteristic data of the entire terrain and landform, which is insufficient as the calculation basis for the earthwork engineering. The three-dimensional model of the GIS model usually adopts the method of converting elevation data into three-dimensional terrain data. For example, data including digital elevation model (DEM), digital surface model (DSM), vector map data, satellite images and aerial photos are collected. These data provide a basis for three-dimensional modeling, and the data is pre-processed to correct errors. For example, the edges are cropped to eliminate splicing errors, orthorectification is performed with perspective aerial photos, and a terrain model is constructed using a digital surface model, that is, a three-dimensional terrain contour model is generated with a grid data set representing the ground elevation, and then the ground object features with higher data accuracy are added to the three-dimensional terrain contour model. However, the three-dimensional model generated by GIS data lacks sufficient accuracy and is difficult to be used for accurate earthwork engineering rough calculation. For large-scale projects, earthwork construction also involves multiple construction entities, and it is more difficult to carry out fine management and control. The present invention accurately integrates the BIM model with the GIS model, and can obtain global data from the GIS model, while obtaining high-precision data from the BIM model. And it can synchronize the progress data of earthwork conditions with the BIM three-dimensional model data, which is convenient for realizing real-time digital twin display and realizing fine management of the progress of engineering construction.

[0061] In the preferred scheme, when calculating through the fusion executor, the priority of the BIM three-dimensional model is set higher than the priority of the GIS model, so as to replace the data in the GIS model that interferes with the BIM three-dimensional model with the data of the BIM three-dimensional model. The preferred step is that in the fusion calculation process, the BIM three-dimensional model is given priority, and the GIS model is added, deleted and updated, that is, after the fusion calculation, the structure of the BIM three-dimensional model is retained, and the data of the GIS model is added, deleted or updated. Preferably, in the part below the foundation surface, the part where the BIM three-dimensional model and the GIS model intersect is the boundary of the initial backfill volume, that is, the part of the cavity structure in the BIM three-dimensional model is deleted; the part where the circumscribed contour of the BIM three-dimensional model intersects with the GIS model is the boundary of the initial excavation volume, that is, the circumscribed contour of the BIM three-dimensional model does not delete the part of the cavity structure in the BIM three-dimensional model. The boundary of the backfill volume and the boundary of the excavation volume are further optimized according to the actual construction data, that is, the overall excavation volume and backfill volume estimation data are obtained. Before the BIM 3D model and the GIS model are intersected, the coordinate system is converted first, usually to a global coordinate system such as WGS84. After the key points are aligned, the parts above the base surface are hidden during the operation to reduce the amount of calculation; a spatial index is established to quickly locate objects that may intersect to improve efficiency. ESRI's ArcGIS platform or open source QGIS is used for intersection operations.

[0062] In the preferred solution, the vehicle transportation data management module also includes vehicle transportation loading and unloading data, which is obtained by collecting the real-time position data and loading status data of the vehicle transportation and jointly solving them; that is, the vehicle output volume data generated by the excavation construction and the vehicle backfill volume data generated by the backfill construction

[0063] Input vehicle transportation and loading and unloading data into the BIM 3D model in real time to update the BIM 3D model;

[0064] Bind the handheld terminal to the vehicle, collect the position and direction of the handheld terminal as the position and direction of the vehicle, collect the movement trajectory of the handheld terminal as the movement trajectory of the vehicle, and obtain the position, direction and movement trajectory of the vehicle in real time; use the Internet of Things protocol to send the vehicle's operation data to the handheld terminal, and the handheld terminal obtains the operation data of the current vehicle at the location; calculate and judge the vehicle's transport output volume or backfill volume data based on the operation data; the vehicle transport data management module adds the position data, and the output volume or backfill volume data to the current BIM three-dimensional model, or deletes it from the BIM three-dimensional model, or replaces part of the BIM three-dimensional model to achieve real-time update of the BIM three-dimensional model.

[0065] Specifically, the present invention utilizes a coordinate acquisition device based on a handheld terminal, an Internet of Things and a vehicle transportation management module integrating big data, and binds a handheld terminal such as a mobile phone to a vehicle, that is, the mobile phone is fixedly connected to the vehicle, and the location and motion data of the vehicle are obtained by combining the mobile phone and the navigation system, that is, after the mobile phone is bound to the vehicle, the collection direction is the direction of the vehicle, and the motion trajectory of the mobile phone is the motion trajectory of the vehicle, thereby obtaining the location, direction and motion trajectory of the vehicle in real time. The Internet of Things protocol is used to send the vehicle's operating data to the mobile phone. For example, the control center on the dump truck sends an instruction to control the lifting of the lifting cylinder, and the instruction is converted into data recognizable by the mobile phone terminal by the Internet of Things protocol, and the mobile phone obtains the operating data of the current vehicle unloading at this location; or the corresponding excavator's mechanical arm instruction, in conjunction with the corresponding dump truck's loading action, the mobile phone obtains the operating data of the current vehicle loading at this location. The vehicle transportation management module is used to collect and manage vehicle transportation data within the construction site, and obtain vehicle transportation output volume or backfill volume data. The output volume or backfill volume data is fed back to the data management module through the data management module, and then sent to the BIM model management module. The output volume or backfill volume data is either added to the current BIM three-dimensional model, or deleted from the BIM three-dimensional model, or the BIM three-dimensional model is partially replaced to achieve real-time update of the BIM three-dimensional model.

[0066] The preferred solution is Figure 1 In the BIM model management module, the BIM model management module also includes an operation executor for updating the BIM three-dimensional model; the geometric shape includes the length, width and height data of the BIM three-dimensional model, and the spatial relationship includes the coordinate data and vector data of the key points in the BIM three-dimensional model. The operation executor adds, deletes and replaces the BIM three-dimensional model in real time. Preferably, the operation of the BIM three-dimensional model is recorded in a time slice manner for easy traceability, thereby ensuring that the construction quality meets the requirements. Preferably, the time slice is cut by day or hour, that is, the traceability is performed by day or hour according to the needs of the project. The operations in each time slice are regarded as an action set. In a single time slice, the BIM model management module executes all operations in an action set, which is convenient for traceability while also reducing the amount of data.

[0067] In the preferred solution, the update of the BIM three-dimensional model adopts a particle algorithm to decompose the vehicle transportation output volume or backfill volume data into corresponding multiple particles; set the volume size of a single particle, update the particles corresponding to the output volume data and the backfill volume data, and complete the update of the BIM three-dimensional model. The smaller the volume of a single particle, the higher the accuracy, but the greater the amount of calculation; update the output volume data, cut the corresponding particles from the BIM three-dimensional model; update the backfill volume data, and merge the corresponding particles into the BIM three-dimensional model, thereby completing the model update. Specifically, simplify the backfill data to the boundary of a cube that needs to be backfilled, then create particles, and let them align and distribute in the cube according to the gravity rule. The particles in this example do not need to process complex collision detection simulations.

[0068] Preferably, in the updating process, the update of the BIM three-dimensional model is constrained by the order distribution, gravity distribution and section data, that is, in the process of setting the cube, the distribution of the backfill order is considered; the gravity distribution is considered, that is, the particles will give priority to filling the lower positions; the section distribution is considered, that is, for the convenience of settlement, the boundaries between the sections are used as boundaries. Excavation or backfilling is constrained to the area corresponding to the vehicle. Secondly, both excavation and backfilling follow the distribution of the inside and outside order and the constraints of the backfill gravity distribution, that is, the backfill volume will be affected by gravity at the backfill position and become a plane until it is constrained by the excavation boundary and the section boundary.

[0069] In the preferred solution, the data management module also includes a verification module to obtain the measured data of the construction site and compare and verify it with the BIM three-dimensional model data. Preferably, the construction site interval is set, and the site is measured by one or more combinations of total station, GPS measurement, drone aerial photography or lidar scanning. The measured data is compared with the BIM three-dimensional model data after the fusion of the BIM three-dimensional model and the GIS model to verify the difference between the two sets of data. If the error is within the preset error threshold range, the verification is passed; if the error exceeds the preset error threshold range, the formation of the error is tracked by backtracking the update data. Preferably, multiple control monitoring points are set at the construction site, and the control monitoring points are continuously measured by a total station or a laser rangefinder, and the elevation of the control monitoring point is compared with the corresponding control point elevation in the fusion model to reduce the difficulty of verification.

[0070] In the preferred solution, the BIM model management module also includes a display module, which displays corresponding data according to user instructions or preset instructions; the displayed data includes one or more combinations of BIM three-dimensional model original graphic data, GIS model graphic data, fused BIM three-dimensional model graphic data, project progress data and earthwork quantity estimation data, and provides model switching and display operations between each group of data.

[0071] Preferably, the display module also displays the input planned and actual construction time, engineering quantity, elevation range or materials, and dynamically simulates the earthwork excavation or backfilling process display; switches, compares and counts the planned progress and actual progress according to the year, month and day. Preferably, different filling and excavation intensity are designed to display the comparison information of the actual engineering quantity of earthwork required and the planned engineering quantity. Compare the initial design with the changed design and analyze the advantages of the changed design.

[0072] Embodiment 2:

[0073] Further illustrate with reference to Example 1, Figures 1 to 4 As shown in , a method for estimating earthwork for the earthwork management system based on the BIM model is as follows: Figure 2 As shown in , the method comprises the following steps:

[0074] S1. Generate a BIM three-dimensional model based on BIM data, where the BIM three-dimensional model includes the initial and final models of the earthwork construction area;

[0075] S2. Generate a three-dimensional model of the earthwork construction area based on GIS data, including the following steps:

[0076] According to the elevation data of the earthwork construction area before construction, the GIS model is divided into multi-scale grids, and the unit grid parameters in the area with sparse elevation data are greater than those in the area with dense elevation data;

[0077] In the earthwork construction area, the grid is encrypted to improve the accuracy of the grid surface in the earthwork construction area;

[0078] The encryption operation refers to making a relatively sparse grid denser by interpolation.

[0079] S3, merge the BIM three-dimensional model with the GIS model, that is, couple the key points of the BIM three-dimensional model with the key points of the GIS model; the coupling process includes aligning the key points of the BIM three-dimensional model with the key points of the GIS model, reading the vector data of the deflection angle, roll angle and pitch angle of the BIM three-dimensional model, and aligning the vector data of the BIM three-dimensional model with the vector data of the GIS model; the key point described in this example refers to the base surface of the BIM three-dimensional model, intercepting a rectangular surface in the base surface, selecting the center line of the rectangular surface as the first reference line, and reading the vector data of the deflection angle, roll angle and pitch angle of the first reference line of the BIM three-dimensional model. According to the corresponding base surface of the vector data, select the corresponding base surface in the GIS model, intercept the corresponding rectangular surface in the base surface, and use the corresponding center line as the second reference line of the GIS model. Align the vector data of the first reference line of the BIM three-dimensional model with the vector data of the second reference line of the GIS model. That is, the alignment of the BIM three-dimensional model and the GIS model is achieved.

[0080] During the fusion calculation, the priority of the BIM 3D model is set higher than that of the GIS model, so as to feed back the updated data of the BIM model to the coupled BIM 3D model in real time; S4, collect the real-time position data and loading status data of vehicle transportation, obtain the vehicle transportation loading and unloading data after joint calculation, and input the vehicle transportation loading and unloading data into the BIM 3D model in real time to update the BIM 3D model;

[0081] Bind the handheld terminal to the vehicle, collect the position and direction of the handheld terminal as the position and direction of the vehicle, collect the movement trajectory of the handheld terminal as the movement trajectory of the vehicle, and obtain the position, direction and movement trajectory of the vehicle in real time; use the Internet of Things protocol to send the vehicle's operation data to the handheld terminal, and the handheld terminal obtains the operation data of the current vehicle at the location; calculate and judge the vehicle's transport output volume or backfill volume data based on the operation data; add the position data and output volume or backfill volume data to the current BIM three-dimensional model, or delete it from the BIM three-dimensional model, or replace part of the BIM three-dimensional model to achieve real-time update of the BIM three-dimensional model;

[0082] A further preferred solution is as follows: Figure 3 As shown in FIG. 1 , in step S4, the specific steps for obtaining the output volume or backfill volume data are:

[0083] S401, binding the handheld terminal to the vehicle; preferably, the handheld terminal is a mobile phone, and the mobile phone is bound to the vehicle, for example, the mobile phone is horizontally fixed to the front driving platform or control console of the vehicle, and the direction of the mobile phone is consistent with the driving direction of the vehicle.

[0084] S402, the handheld terminal obtains the vehicle direction and vehicle position data; that is, the direction of the mobile phone is identified as the vehicle direction, and the position of the mobile phone is identified as the vehicle position. The mobile phone positioning can be based on GPS or Beidou satellite positioning, or on-site communication base station positioning based on triangulation algorithm.

[0085] S403, introducing a time parameter to obtain a dynamic motion trajectory of the vehicle;

[0086] S411, synchronously with S402~S403, collects loading and unloading cylinder control data, mechanical arm cylinder control data, weighbridge collection data and concrete out-of-warehouse data, and sends the data to the handheld terminal via the Internet of Things; wherein the loading and unloading cylinder control data is the collection of cylinder control instructions issued from the main control system of the dump truck, such as the control instructions for the cylinder push-out or retraction collected from the CAN bus of the dump truck, and from the control instructions, the vehicle transportation management module of the present invention can derive that the vehicle has performed an unloading operation at the current position. The mechanical arm cylinder control data means that the loader has performed a loading operation at the current position. The weighbridge collection data is the weight of the current vehicle at the weighbridge position, and the vehicle's loading capacity is obtained from the vehicle's in and out weight difference, including the output volume or the backfill volume. The concrete out-of-warehouse data is used to characterize the backfill loading volume of the current vehicle at the concrete mixing plant discharge port position. Preferably, the data is used as verification data for the weighbridge collection data.

[0087] S412. Obtain output volume or backfill volume including time and position data according to the command data fed back by the handheld terminal and the vehicle dynamic trajectory.

[0088] The preferred solution is Figure 4 As shown in , the update process includes the following steps:

[0089] S421. Divide the fill and cut area of ​​the integrated BIM 3D model into sections; the divided sections serve as boundary constraints.

[0090] S422, particle-izing the fill-cut area, and particle-izing the output volume and the backfill volume;

[0091] That is, the excavation and filling area, output volume and backfill volume are decomposed into multiple particles, and the volume of each particle is set, that is, the excavation and filling area, output volume and backfill volume are particle-ized; preferably, the volume of each particle is set according to the accuracy requirement. If the accuracy requirement is high, a smaller volume particle is set.

[0092] S423. Perform particle volume calculation on the fill-in and cut-out areas according to the output volume or the backfill volume. During the calculation process, set the boundary constraints of the fill-in and cut-out areas according to the specific construction conditions. In the preferred solution, during the particle volume calculation process, when performing physical calculations, a single particle is a spherical particle, and the calculation is performed within the boundary constraint range according to the physical properties of the spherical particle. The physical properties in this example only use gravity properties, and do not consider rebound properties. Perform alignment operations on each particle so that there is no intersection between particles and the axes of adjacent particles coincide. This solution can greatly reduce the amount of calculation for subsequent volume calculations and reduce the calculation errors caused by fitting. When performing volume calculations, the volume calculation is performed using the circumscribed rectangle of a single particle. This solution greatly reduces the amount of calculation of the particle algorithm and improves the efficiency of particle volume calculations under the premise of sufficient accuracy.

[0093] S424. Obtain earthwork estimate data through the above steps, and perform real-time addition, deletion or replacement operations on the BIM three-dimensional model.

[0094] In the preferred solution, the BIM 3D model update is stored in a time slice manner, that is, the BIM 3D model update operation is completed within a time period, so as to facilitate the traceability of construction quality;

[0095] The time slices are cut into days or hours, and the operations within each time slice are regarded as an action set. Within a single time slice, the BIM model management module executes all operations in an action set, which facilitates traceability while also reducing the amount of data and calculation.

[0096] S5. Compare the measured data with the model data. If the error is within the preset error range, the verification is passed; if the error exceeds the preset error range, the formation of the error is tracked and the error is corrected by backtracking the data.

[0097] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A soil and stone management system based on BIM model, characterized by: Including GIS model management module, BIM model management module and vehicle transportation data management module; GIS model management module, used to generate GIS models based on geographic information data of earthwork projects; BIM model management module, used for updating and verifying BIM 3D models of the geometric shapes and spatial relationships of earthworks in earthwork projects; The BIM model management module includes an operation executor for updating the BIM three-dimensional model; the operation executor is used to add, delete and replace parts in the BIM three-dimensional model according to the data of the vehicle transportation data management module; The BIM model management module also includes a fusion executor for fusion with the GIS model; The fusion actuator is used to couple the key points of the BIM 3D model with the key points of the GIS model; The coupling process includes: aligning the key points of the BIM 3D model with the key points of the GIS model, reading the vector data of the deflection angle, roll angle and pitch angle of the BIM 3D model, and aligning the vector data of the BIM 3D model with the vector data of the GIS model; The vehicle transportation data management module includes vehicle transportation loading and unloading data. By collecting the real-time position data and loading status data of the vehicle transportation, the vehicle transportation loading and unloading data is obtained after joint solution, so as to obtain the output volume or backfill volume data of the vehicle transportation; the vehicle position data and the output volume or backfill volume data are input into the BIM three-dimensional model in real time, so as to update the BIM three-dimensional model; Joint solution means binding the handheld terminal to the vehicle, collecting the position and direction of the handheld terminal as the position and direction of the vehicle, collecting the movement trajectory of the handheld terminal as the movement trajectory of the vehicle, and obtaining the position, direction and movement trajectory of the vehicle in real time; using the Internet of Things protocol to send the vehicle's operation data to the handheld terminal, the handheld terminal obtains the operation data of the current vehicle at the location; calculating and judging the vehicle's transport output volume or backfill volume data based on the operation data; The vehicle transportation data management module adds the location data and the output volume or backfill volume data to the current BIM 3D model, or deletes it from the BIM 3D model, or replaces part of the BIM 3D model, so as to realize the real-time update of the BIM 3D model; The GIS model management module sends the geographic information data of the earthwork project to the BIM model management module, which integrates and updates the geographic information data to the BIM three-dimensional model; the vehicle transportation data management module sends the acquired data to the BIM model management module, which updates the BIM three-dimensional model; The update of the BIM three-dimensional model adopts a particle algorithm to decompose the vehicle transportation output volume or backfill volume data into corresponding multiple particles; set the volume size of a single particle, update the particles corresponding to the output volume data and the backfill volume data, and complete the update of the BIM three-dimensional model; During the particle volume calculation process, when performing physical calculations, a single particle is a spherical particle. According to the physical properties of the spherical particle, calculations are performed within the boundary constraints, and alignment operations are performed to ensure that the particles are not staggered and the axes of adjacent particles coincide. When performing volume calculations, the volume calculation is performed based on the bounding rectangle of a single particle.

2. The earthwork management system based on the BIM model according to claim 1 is characterized in that: When calculating through the fusion executor, the priority of the BIM 3D model is set higher than that of the GIS model, so as to replace the data in the GIS model that interferes with the BIM 3D model with the data of the BIM 3D model.

3. The earthwork management system based on the BIM model according to claim 1 is characterized in that: The BIM model management module also includes a verification module, which is used to obtain measured data from the construction site and compare and verify it with the BIM three-dimensional model data.

4. The earthwork management system based on the BIM model according to claim 1 is characterized in that: The BIM model management module also includes a display module for displaying corresponding data according to user instructions or preset instructions; The displayed data includes one or more combinations of BIM three-dimensional model graphic data, GIS model data, fused graphic data, project progress data and earthwork quantity estimation data.

5. A method for rough calculation of earthwork for the earthwork management system based on the BIM model as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Generate a BIM three-dimensional model based on BIM data, where the BIM three-dimensional model includes the initial and final models of the earthwork construction area; S2. Generate a three-dimensional model of the earthwork construction area based on GIS data, including the following steps: The GIS model is divided into multi-scale grids according to the density of elevation data in different areas before the construction of the earthwork project. In the earthwork construction area, the grid is encrypted; S3, integrating the BIM 3D model with the GIS model, that is, coupling the key points of the BIM 3D model with the key points of the GIS model; the coupling includes aligning the key points of the BIM 3D model with the key points of the GIS model, reading the vector data of the deflection angle, roll angle and pitch angle of the BIM 3D model, and aligning the vector data of the BIM 3D model with the vector data of the GIS model; During fusion calculation, the priority of the BIM 3D model is set higher than that of the GIS model, so that the data in the GIS model that interferes with the BIM 3D model can be replaced with the data in the BIM 3D model. S4. Collect the real-time position data and loading status data of vehicle transportation, obtain the vehicle transportation loading and unloading data after joint solution, and input the vehicle transportation loading and unloading data into the BIM three-dimensional model in real time for updating the BIM three-dimensional model; Bind the handheld terminal to the vehicle, collect the position and direction of the handheld terminal as the position and direction of the vehicle, collect the movement trajectory of the handheld terminal as the movement trajectory of the vehicle, and obtain the position, direction and movement trajectory of the vehicle in real time; use the Internet of Things protocol to send the vehicle's operation data to the handheld terminal, and the handheld terminal obtains the operation data of the current vehicle at the location; calculate and judge the vehicle's transport output volume or backfill volume data based on the operation data; add the position data and output volume or backfill volume data to the current BIM three-dimensional model, or delete it from the BIM three-dimensional model, or replace part of the BIM three-dimensional model to achieve real-time update of the BIM three-dimensional model; S5. Compare the measured data with the model data. When the error is within the preset error range, the verification is passed; when the error exceeds the preset error range, the data is updated back-trackingly to track the formation of the error and correct the error.

6. The method for rough calculation of earthwork in the earthwork management system based on the BIM model according to claim 5 is characterized by: In step S4, the specific steps of obtaining the output volume or backfill volume data are: S401, binding the handheld terminal to the vehicle; S402, obtaining vehicle direction and vehicle position data by the handheld terminal; S403, introducing a time parameter to obtain a dynamic motion trajectory of the vehicle; S411, synchronously with S402 and S403, collects loading and unloading cylinder control data, mechanical arm cylinder control data, weighbridge collection data and concrete out-of-warehouse data, and sends the data to the handheld terminal via the Internet of Things; S412. Obtain output volume or backfill volume including time and position data according to the command data fed back by the handheld terminal and the vehicle dynamic trajectory.

7. The method for rough calculation of earthwork in the earthwork management system based on the BIM model according to claim 5 is characterized by: The process of updating the BIM 3D model includes the following steps: S421, dividing the filling and cutting area of ​​the integrated BIM 3D model into sections; S422, particle-izing the fill-cut area, and particle-izing the output volume and the backfill volume; That is, the excavation and filling area, output volume and backfill volume are decomposed into multiple particles, and the volume size of each particle is set, that is, the excavation and filling area, output volume and backfill volume are particle-ized; S423, performing particle volume calculation on the fill-cut area according to the output volume or the backfill volume, and during the calculation process, setting boundary constraints of the fill-cut area according to specific construction conditions; S424. Obtain earthwork estimate data through the above steps, and perform real-time addition, deletion or replacement operations on the BIM three-dimensional model.

8. The method for estimating earthwork in the earthwork management system based on the BIM model according to claim 7 is characterized by: In step S423, during the particle volume calculation process, when performing physical calculations, a single particle is a spherical particle, and calculations are performed within the boundary constraints according to the physical properties of the spherical particle, and alignment operations are performed so that the particles are not staggered and the axes of adjacent particles coincide; When performing volume calculations, the volume calculation is performed based on the bounding rectangle of a single particle.

9. The method for rough calculation of earthwork in the earthwork management system based on the BIM model according to claim 5 is characterized by: In step S4, the BIM 3D model update is stored in a time slice manner, that is, the BIM 3D model update operation is completed within a time period to trace the construction quality; The time slices are cut into days or hours, and the operations in each time slice are regarded as an action set. In a single time slice, the BIM model management module executes all operations in an action set, thereby reducing the amount of data while tracing back.

Images