Construction scheme pre-design system and method based on AI virtual technology

Abstract

The invention belongs to the technical field of construction scheme design, and discloses a construction scheme pre-design system and method based on an AI virtual technology. Comprising the steps of obtaining building drawing data, building engineering project requirement text data and historical construction data, and analyzing the building engineering project requirement text data to obtain building engineering construction requirements; pre-selecting a construction scheme of the constructional engineering according to the constructional engineering construction requirements, the constructional drawing data and the historical construction data, creating a three-dimensional entity model of the constructional engineering according to the constructional drawing data, and simulating the construction operation process of the constructional engineering according to the pre-selected construction scheme of the constructional engineering and the three-dimensional entity model of the constructional engineering; performing risk detection in the simulated construction operation process of the building engineering; performing optimization adjustment according to a risk detection result; and the reasonability of pre-design of the construction scheme is further improved, so that the construction speed of the building engineering is increased, and the construction cost of the building engineering is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of construction scheme design, and more specifically, to a construction scheme pre-design system and method based on AI virtual technology. Background Art

[0002] The patent application publication number CN118568837A discloses a BIM-based building curtain wall simulation design method, system, equipment and medium. The method includes obtaining corresponding curtain wall component information and construction location node information based on the initial design and construction plan; performing collision detection based on the curtain wall component information and construction location node information in the main building BIM model to obtain collision detection results; optimizing the initial design and construction plan based on the collision detection results to obtain a curtain wall simulation design plan, performing construction simulation based on the curtain wall simulation design plan to obtain construction simulation results; obtaining plan correction parameters based on the construction simulation results to update the curtain wall simulation design plan; constructing a curtain wall simulation design model based on the updated building curtain wall simulation design plan, the curtain wall simulation design model performs a visual construction scenario simulation of the design and construction process of the building curtain wall, and displays it on a preset collaborative design platform; the application has the effect of improving the design efficiency of building curtain wall design.

[0003] However, during the operation of the simulated construction project, the three-dimensional solid models of the building components may overlap. If this is not discovered in time, the building components may be deformed or damaged during the construction process, and the building components cannot be installed or constructed, resulting in material waste and increased construction costs. The three-dimensional solid model of the construction equipment is not static and will move. The traditional method only considers the volume area of ​​the three-dimensional solid model of the static construction equipment, and does not consider the area swept by the three-dimensional solid model of the construction equipment during movement, which may cause misjudgment. The three-dimensional solid model of the construction equipment may be judged as not hitting an obstacle when it hits an obstacle during movement, resulting in damage to the equipment, increased construction costs, and delayed construction progress. During the operation of the simulated construction project, there may be a period of time when the construction progress changes slowly. If this is not discovered and optimized in time, the construction time of the construction project may be extended and construction efficiency may be reduced.

[0004] In view of this, the present invention proposes a construction scheme pre-design system and method based on AI virtual technology to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art and to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a construction plan pre-design system based on AI virtual technology, comprising:

[0006] The data acquisition component is responsible for acquiring architectural drawing data, construction project requirement text data, and historical construction data, and parsing the construction project requirement text data to obtain construction project requirements;

[0007] The construction plan pre-selection component is responsible for pre-selecting the construction plan of the building project based on the construction requirements of the building project, building drawing data and historical construction data;

[0008] The construction project simulation operation component is responsible for creating a three-dimensional solid model of the construction project based on the architectural drawing data. The three-dimensional solid model includes construction equipment, building components, and all elements related to the construction of the construction project. The construction operation process of the construction project is simulated based on the pre-selected construction plan of the construction project and the three-dimensional solid model of the construction project;

[0009] The risk detection component is responsible for performing risk detection during the operation of the simulated construction project, obtaining the axis-aligned bounding box of the three-dimensional solid model of the building component, judging whether there is a conflict between the three-dimensional solid models of the building components through the intersection volume between the axis-aligned bounding box of the three-dimensional solid model of the building component and the three-dimensional solid models of the other building components, obtaining the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment, judging whether there is a conflict between the three-dimensional solid model of the construction equipment and the other three-dimensional solid models during the movement through the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment and the volume area of ​​the other three-dimensional solid models, establishing a construction project progress change line graph, obtaining the progress change coefficient through the construction project progress change line graph, and judging whether there is a period of slow construction based on the progress change coefficient;

[0010] The optimization and adjustment component is responsible for making optimization and adjustments based on risk detection results.

[0011] Furthermore, the method of parsing the text data of construction project requirements to obtain construction project requirements includes:

[0012] Preprocessing the construction project requirement text data, removing headers, footers, page numbers, extra spaces and special symbols in the construction project requirement text data, segmenting the construction project requirement text data according to natural segments, obtaining construction project requirement sub-text data, and completing the preprocessing;

[0013] Perform named entity recognition on the sub-text data of construction project requirements to obtain the construction requirements of the construction project.

[0014] Furthermore, the method of pre-selecting a construction plan for a construction project based on construction requirements, building drawing data, and historical construction data includes:

[0015] Extracting historical building construction requirements and historical building drawing data from the historical construction data, comparing the building construction requirements with the historical building construction requirements, obtaining a similarity between the building construction requirements and the historical building construction requirements, and recording the similarity as a first similarity; comparing the building drawing data with the historical building drawing data, obtaining a similarity between the building drawing data and the historical building drawing data, and recording the similarity as a second similarity;

[0016] The first similarity and the second similarity are added together to obtain the historical building project construction requirements and historical building drawing data corresponding to the maximum addition result, and these are recorded as the pre-selected building project construction requirements and pre-selected building drawing data. The construction plan of the historical building project corresponding to the pre-selected building project construction requirements and pre-selected building drawing data is used as the construction plan of the pre-selected building project.

[0017] Furthermore, the method for simulating the construction operation process of a construction project based on a pre-selected construction plan of the construction project and a three-dimensional solid model of the construction project includes:

[0018] Create a three-dimensional solid model of the construction project based on the architectural drawing data using 3D software, and place the three-dimensional solid model in the corresponding spatial position according to the architectural drawing data;

[0019] In the three-dimensional solid model, the operations and processes of each construction stage are defined according to the pre-selected construction plan of the building project. According to the operations and processes of each construction stage, the simulation software is started to simulate the construction operation process of the building project.

[0020] Furthermore, the method for determining whether conflicts occur between the three-dimensional solid models of building components includes:

[0021] Determine whether physical overlap occurs between the three-dimensional solid models of the building components. If physical overlap occurs between the three-dimensional solid models of the building components, a conflict occurs between the three-dimensional solid models of the building components. If no physical overlap occurs between the three-dimensional solid models of the building components, no conflict occurs between the three-dimensional solid models of the building components.

[0022] Furthermore, the method for determining whether physical overlap occurs between the three-dimensional solid models of building components includes:

[0023] Randomly select two three-dimensional solid models of building components, record them as the first three-dimensional solid model of the building component and the second three-dimensional solid model of the building component, and obtain the spatial coordinates P1 of all vertices of the three-dimensional solid model of the first building component i =(x1 i ,y1 i ,z1 i), obtaining an axis-aligned bounding box A1A1B1B1 of the first building component three-dimensional solid model according to the spatial coordinates of all vertices of the first building component three-dimensional solid model;

[0024] Among them, A1A1B1B1=[x1 min ,x1 max ],[y1 min ,y1 max ],[z1 min ,z1 max ]; x1 min =min 1≤i≤n x1 i , x1 max =max 1≤i≤n x1i,y1 min =min 1≤i≤n y1 i , y1 max =max 1≤i≤n y1 i , z1 min =min 1≤i≤n z1 i , z1 max =max 1≤i≤n z1 i , i is the index of the vertex of the first building component 3D solid model, i=1,2,3,……,n, n is the number of vertices of the first building component 3D solid model, x1 i is the horizontal coordinate of the i-th vertex of the 3D solid model of the first building component, y1 i is the vertical coordinate of the i-th vertex of the 3D solid model of the first building component, z1 i is the vertical coordinate of the i-th vertex of the 3D solid model of the first building component, P1 i is the spatial coordinate of the i-th vertex of the three-dimensional solid model of the first building component;

[0025] The same method is used to obtain the axis-aligned bounding box A2A2B2B2 of the second building component three-dimensional solid model;

[0026] Among them, A2A2B2B2=[x2 min ,x2 max ],[y2 min ,y2 max ],[z2 min ,z2 max ]; x2 min =min 1≤j≤m x2 j , x2 max =max 1≤j≤m x2 j , y2 min =min1≤j≤m y2 j , y2 max =max 1≤j≤m y2 j , z2 min =min 1≤j≤m z2 j , z2 max =max 1≤j≤m z2 j , j is the index of the vertex of the second building component three-dimensional solid model, j = 1, 2, 3, ..., m, m is the number of vertices of the second building component three-dimensional solid model, x2 j is the horizontal coordinate of the j-th vertex of the 3D solid model of the second building component, y2 j is the ordinate of the jth vertex of the 3D solid model of the second building component, z2 j is the vertical coordinate of the j-th vertex of the three-dimensional solid model of the second building component;

[0027] like Then, an intersection volume V(θ12) of the first building component 3D solid model and the second building component 3D solid model is obtained. Otherwise, no physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model.

[0028] Wherein, θ12=θ1∩θ2; θ1 is the volume area of ​​the three-dimensional solid model of the first building component, and θ2 is the volume area of ​​the three-dimensional solid model of the second building component;

[0029] An intersection volume threshold is set, and if the intersection volume of the first building component 3D solid model and the second building component 3D solid model is greater than the intersection volume threshold, a physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model; otherwise, no physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model;

[0030] The same method is used to determine whether there is physical overlap between the three-dimensional solid models of each building component.

[0031] Furthermore, the method for determining whether a conflict occurs between the three-dimensional solid model of the construction equipment and other three-dimensional solid models during movement includes:

[0032] determining whether the three-dimensional solid model of the construction equipment physically overlaps with other three-dimensional solid models during the movement; if the three-dimensional solid model of the construction equipment physically overlaps with other three-dimensional solid models during the movement, then the three-dimensional solid model of the construction equipment conflicts with the other three-dimensional solid models during the movement; otherwise, the three-dimensional solid model of the construction equipment does not conflict with the other three-dimensional solid models during the movement;

[0033] The process of determining whether the 3D solid model of the construction equipment physically overlaps with other 3D solid models during movement includes:

[0034] Obtain the time t1 when the construction equipment starts moving and the time t2 when the movement ends, evenly divide the time period from t1 to t2 into k1 time points, and record the k1 time points as movement time points, and obtain the axis-aligned bounding boxes of the three-dimensional solid model of the construction equipment at the first movement time point and the second movement time point, and record the volume area of ​​the axis-aligned bounding boxes of the three-dimensional solid model of the construction equipment at the first movement time point and the second movement time point, as well as the volume area swept by the axis-aligned bounding box when moving from the first movement time point to the second movement time point as the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment from the first movement time point to the second movement time point;

[0035] Obtain the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment from the first moving time point to the second moving time point and the volume area of ​​the remaining three-dimensional solid models from the first moving time point to the second moving time point, and record it as the intersection volume area, obtain the volume of each intersection volume area, and set a volume threshold;

[0036] If the volume of the intersection volume area is greater than the volume threshold, the three-dimensional solid model of the construction equipment physically overlaps with the three-dimensional solid model during the movement; otherwise, the three-dimensional solid model of the construction equipment does not physically overlap with the three-dimensional solid model during the movement.

[0037] Furthermore, the method for determining whether there is a slow construction period based on the progress variation coefficient includes:

[0038] Get the construction project start time t3 and end time t4, divide the time period from t3 to t4 evenly into k2 time points, and record the k2 time points as progress time points, and obtain the construction project progress at each progress time point;

[0039] Establish a blank two-dimensional rectangular coordinate system, set the abscissa of the blank two-dimensional rectangular coordinate system to time, set the ordinate of the blank two-dimensional rectangular coordinate system to the construction project progress, and fill the construction project progress at each progress time point into the blank two-dimensional rectangular coordinate system to obtain the construction project progress mapping points, draw straight lines in chronological order to connect the construction project progress mapping points in sequence, and obtain a construction project progress change line graph;

[0040] Starting from the second construction project progress mapping point, draw a line parallel to the vertical axis through the construction project progress mapping point, and record it as the first progress parallel line; draw a line parallel to the horizontal axis through the previous construction project progress mapping point, and record it as the second progress parallel line;

[0041] The straight line between the construction project progress mapping point and the previous construction project progress mapping point is recorded as the first straight line, the area of ​​the figure enclosed by the first straight line, the first progress parallel line, and the second progress parallel line is obtained, and the area of ​​the enclosed figure is used as the progress change coefficient of the construction project progress mapping point, until the last construction project progress mapping point is reached;

[0042] A progress change coefficient threshold is set. If the progress change coefficient of a construction project progress mapping point is less than the progress change coefficient threshold, there is a slow construction period. The time corresponding to the construction project progress mapping point is recorded as t6, and the time corresponding to the previous construction project progress mapping point of the construction project progress mapping point is recorded as t5. The time period from t5 to t6 is recorded as the slow construction period. If the progress change coefficients from the second construction project progress mapping point to the last construction project progress mapping point are all greater than or equal to the progress change coefficient threshold, there is no slow construction period.

[0043] Furthermore, the method of optimizing and adjusting according to the risk detection results includes:

[0044] Extract the conflicting 3D solid models, and the relevant personnel will optimize and adjust the construction plans of the pre-selected building projects based on the conflicting 3D solid models to avoid conflicts between the 3D solid models. Extract the slow construction time period, and the relevant personnel will optimize and adjust the construction plans of the pre-selected building projects within the slow construction time period to improve the progress of the construction projects within the slow construction time period.

[0045] A construction scheme pre-design method based on AI virtual technology, comprising:

[0046] Step S1: Acquire architectural drawing data, construction project requirement text data, and historical construction data, parse the construction project requirement text data, and obtain construction project construction requirements;

[0047] Step S2: pre-selecting a construction plan for the construction project based on the construction requirements of the construction project, the architectural drawing data, and the historical construction data; creating a three-dimensional solid model of the construction project based on the architectural drawing data; and simulating the construction operation process of the construction project based on the pre-selected construction plan for the construction project and the three-dimensional solid model of the construction project;

[0048] Step S3: Perform risk detection during the construction operation of the simulated construction project to determine whether conflicts occur between the three-dimensional solid models, establish a construction project progress change line chart, obtain a progress change coefficient from the construction project progress change line chart, and determine whether there is a construction slow period based on the progress change coefficient;

[0049] Step S4: Optimize and adjust based on the risk detection results.

[0050] The technical effects and advantages of the construction scheme pre-design system and method based on AI virtual technology of the present invention are as follows:

[0051] 1. Conflicts between 3D solid models of building components are determined by the intersection volume between the axis-aligned bounding box of the 3D solid model of the building component and the 3D solid models of other building components. Conflicting 3D solid models are accurately and promptly identified and optimized, ensuring that building components remain intact during construction and that they are installed and constructed normally, thereby saving building materials and reducing construction costs.

[0052] 2. By using the intersection of the path trajectory volume of the construction equipment's 3D solid model and the volumetric areas of the remaining 3D solid models, it is determined whether the 3D solid model of the construction equipment has collided with other 3D solid models during its movement. This accurately determines whether the 3D solid model of the construction equipment has collided with obstacles during movement, thereby avoiding damage to the equipment, reducing construction costs, and ensuring the normal progress of construction.

[0053] 3. Obtain the progress change coefficient through the construction project progress change line chart, and judge whether there is a period of slow construction based on the progress change coefficient. Accurately determine which period of time has slow construction progress, and relevant personnel will make optimization adjustments to avoid blind adjustments, thereby ensuring the normal completion of the construction project, or even ahead of schedule, and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of a construction plan pre-design system based on AI virtual technology of the present invention;

[0055] Figure 2 Schematic diagram of a construction scheme pre-design method based on AI virtual technology of the present invention;

[0056] Figure 3 This is a flow chart for judging whether a three-dimensional entity model of a construction equipment physically overlaps with other three-dimensional entity models during movement. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0058] Example 1

[0059] See also Figure 1 and Figure 3 As shown, the construction plan pre-design system based on AI virtual technology described in this embodiment includes:

[0060] The data acquisition component is responsible for acquiring architectural drawing data, construction project requirement text data, and historical construction data, and parsing the construction project requirement text data to obtain construction project requirements;

[0061] The construction plan pre-selection component is responsible for pre-selecting the construction plan of the building project based on the construction requirements of the building project, building drawing data and historical construction data;

[0062] The construction project simulation operation component is responsible for creating a three-dimensional solid model of the construction project based on the architectural drawing data. The three-dimensional solid model includes construction equipment, building components, and all elements related to the construction of the construction project. The construction operation process of the construction project is simulated based on the pre-selected construction plan of the construction project and the three-dimensional solid model of the construction project;

[0063] The risk detection component is responsible for performing risk detection during the operation of the simulated construction project, obtaining the axis-aligned bounding box of the three-dimensional solid model of the building component, judging whether there is a conflict between the three-dimensional solid models of the building components through the intersection volume between the axis-aligned bounding box of the three-dimensional solid model of the building component and the three-dimensional solid models of the other building components, obtaining the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment, judging whether there is a conflict between the three-dimensional solid model of the construction equipment and the other three-dimensional solid models during the movement through the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment and the volume area of ​​the other three-dimensional solid models, establishing a construction project progress change line graph, obtaining the progress change coefficient through the construction project progress change line graph, and judging whether there is a period of slow construction based on the progress change coefficient;

[0064] The optimization and adjustment component is responsible for making optimization and adjustments based on risk detection results.

[0065] The process of obtaining architectural drawing data, construction project requirement text data, and historical construction data includes:

[0066] Obtain structural layout, component information (beams, columns, plates, etc.), spatial layout, elevation, dimensions, material parameters, etc. through architectural drawing data;

[0067] The construction project requirement text data includes additional conditions such as construction period requirements, cost constraints, allocation of manpower, machinery, and material resources, project management plan (including WBS structure, division of responsibilities, etc.), environmental protection, safety, and regulatory requirements;

[0068] Construction projects require text data as specifications and constraints for construction;

[0069] The historical construction data includes all data generated during the construction of historical building projects;

[0070] Setting up a data collection terminal, wherein the data collection terminal is used to collect architectural drawing data, construction project requirement text data and historical construction data;

[0071] Connecting to the server of the construction company through the data acquisition terminal, and obtaining the architectural drawing data, construction project requirement text data and historical construction data in the server of the construction company through the data acquisition terminal;

[0072] The process of parsing the text data of construction project requirements to obtain construction project requirements includes:

[0073] Preprocessing the construction project requirement text data, removing headers, footers, page numbers, extra spaces and special symbols in the construction project requirement text data, segmenting the construction project requirement text data according to natural segments, obtaining construction project requirement sub-text data, and completing the preprocessing;

[0074] Perform named entity recognition on the sub-text data of construction project requirements to obtain construction project requirements;

[0075] For example, predefined entity categories include construction period, date, material, process, restriction, etc. 180 days, 90 working days, etc. belong to construction period, April 23, 2025, etc. belong to date, C30 concrete, HRB400, etc. belong to material, steel bar binding, concrete pouring, etc. belong to process, no later than, must be, etc. belong to restriction, construction project requirement sub-text data is that pouring concrete requires C30 strength grade, after performing named entity recognition on the construction project requirement sub-text data, the recognition results are obtained: "Material: C30 concrete", "Process: concrete pouring".

[0076] The process of pre-selecting a construction plan for a building project based on construction requirements, building drawing data, and historical construction data includes:

[0077] Extracting historical building project construction requirements and historical building drawing data from the historical construction data, comparing the building project construction requirements with the historical building project construction requirements, obtaining a similarity between the building project construction requirements and the historical building project construction requirements, and recording the similarity as a first similarity; comparing the building drawing data with the historical building drawing data, obtaining a similarity between the building drawing data and the historical building drawing data, and recording the similarity as a second similarity; adding the first similarity and the second similarity to obtain the historical building project construction requirements and historical building drawing data corresponding to the maximum addition result, and recording the results as pre-selected building project construction requirements and pre-selected building drawing data; and using the construction plan of the historical building project corresponding to the pre-selected building project construction requirements and pre-selected building drawing data as the construction plan of the pre-selected building project;

[0078] For example, the historical construction data contains all data generated during the construction of three historical building projects, which are respectively recorded as the first historical building project, the second historical building project, and the third historical building project. The similarity between the construction requirements of the construction project and the historical building project construction requirements of the first historical building project is 98%, the similarity between the construction requirements of the construction project and the historical building project construction requirements of the first historical building project is 97%, the similarity between the construction requirements of the construction project and the historical building project construction requirements of the first historical building project is 95%, the similarity between the architectural drawing data and the historical architectural drawing data of the first historical building project is 94%, the similarity between the architectural drawing data and the historical architectural drawing data of the first historical building project is 98%, and the similarity between the architectural drawing data and the historical architectural drawing data of the first historical building project is 96%. 98%+94%=192%, 97%+98%=195%, 95%+96%=191%, 195%>192%>191%, so the construction plan of the second historical building project is selected as the pre-selected construction plan.

[0079] The method for creating a three-dimensional solid model of a construction project based on architectural drawing data and simulating the construction operation process of the construction project based on a pre-selected construction plan of the construction project and the three-dimensional solid model of the construction project includes:

[0080] Creating a three-dimensional solid model of the construction project based on the architectural drawing data using 3D software, wherein the three-dimensional solid model includes buildings, structures, construction sites, construction equipment, building components, material storage areas, and all elements related to the construction of the construction project, and placing the three-dimensional solid model in corresponding spatial locations according to the architectural drawing data;

[0081] In the three-dimensional solid model, the operations and processes of each construction stage are defined according to the pre-selected construction plan of the building project. According to the operations and processes of each construction stage, the simulation software is started to simulate the construction operation process of the building project.

[0082] The process of obtaining an axis-aligned bounding box of the three-dimensional solid model of the building component and determining whether conflicts occur between the three-dimensional solid models of the building components based on the intersection volume between the axis-aligned bounding box of the three-dimensional solid model of the building component and the three-dimensional solid models of other building components includes:

[0083] determining whether the three-dimensional solid models of the building components physically overlap, if the three-dimensional solid models of the building components physically overlap, then a conflict occurs between the three-dimensional solid models of the building components; and determining whether the three-dimensional solid models of the building components physically overlap, if the three-dimensional solid models of the building components do not physically overlap, then no conflict occurs between the three-dimensional solid models of the building components;

[0084] The process of determining whether physical overlap occurs between the three-dimensional solid models of building components includes:

[0085] Randomly select two three-dimensional solid models of building components, record them as the first three-dimensional solid model of the building component and the second three-dimensional solid model of the building component, and obtain the spatial coordinates P1 of all vertices of the three-dimensional solid model of the first building component i =(x1 i ,y1 i ,z1 i ), obtaining an axis-aligned bounding box A1A1B1B1 of the first building component three-dimensional solid model according to the spatial coordinates of all vertices of the first building component three-dimensional solid model;

[0086] Among them, A1A1B1B1=[x1 min ,x1 max ],[y1 min ,y1 max ],[z1 min ,z1 max ];

[0087] x1 min =min 1≤i≤n x1 i , x1 max =max 1≤i≤n x1 i , y1 min =min 1≤i≤n y1 i , y1 max =max 1≤i≤n y1 i , z1 min =min 1≤i≤n z1 i , z1 max =max 1≤i≤n z1 i, i is the index of the vertex of the first building component 3D solid model, i=1,2,3,……,n, n is the number of vertices of the first building component 3D solid model, x1 i is the horizontal coordinate of the i-th vertex of the 3D solid model of the first building component, y1 i is the vertical coordinate of the i-th vertex of the 3D solid model of the first building component, z1 i is the vertical coordinate of the i-th vertex of the 3D solid model of the first building component, P1 i is the spatial coordinate of the i-th vertex of the three-dimensional solid model of the first building component;

[0088] The same method is used to obtain the axis-aligned bounding box A2A2B2B2 of the second building component three-dimensional solid model;

[0089] Among them, A2A2B2B2=[x2 min ,x2 max ],[y2 min ,y2 max ],[z2 min ,z2 max ];

[0090] x2 min =min 1≤j≤m x2 j , x2 max =max 1≤j≤m x2 j , y2 min =min 1≤j≤m y2 j , y2 max =max 1≤j≤m y2 j , z2 min =min 1≤j≤m z2 j , z2 max =max 1≤j≤m z2 j , j is the index of the vertex of the second building component three-dimensional solid model, j = 1, 2, 3, ..., m, m is the number of vertices of the second building component three-dimensional solid model, x2 j is the horizontal coordinate of the j-th vertex of the 3D solid model of the second building component, y2 j is the ordinate of the jth vertex of the 3D solid model of the second building component, z2 j is the vertical coordinate of the j-th vertex of the three-dimensional solid model of the second building component;

[0091] like Then, an intersection volume V(θ12) of the first building component 3D solid model and the second building component 3D solid model is obtained. Otherwise, no physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model.

[0092] Wherein, θ12=θ1∩θ2; θ1 is the volume area of ​​the three-dimensional solid model of the first building component, and θ2 is the volume area of ​​the three-dimensional solid model of the second building component;

[0093] Setting an intersection volume threshold, which can be set through experimental data analysis or experience, wherein if the intersection volume of the first building component 3D solid model and the second building component 3D solid model is greater than the intersection volume threshold, a physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model; and if the intersection volume of the first building component 3D solid model and the second building component 3D solid model is less than or equal to the intersection volume threshold, no physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model.

[0094] The same method is used to determine whether there is physical overlap between the three-dimensional solid models of each building component;

[0095] It should be explained that during the operation of a simulated construction project, overlap may occur between the three-dimensional solid models of building components. If this is not discovered in time, the building components may be deformed or damaged during the construction process, and the building components cannot be installed or constructed, thereby wasting materials and increasing construction costs. Therefore, the present invention determines whether there is a conflict between the three-dimensional solid models of building components by the intersection volume between the axis-aligned bounding box of the three-dimensional solid model of the building component and the three-dimensional solid models of the remaining building components. The conflicting three-dimensional solid models are accurately and timely confirmed and optimized and adjusted, thereby ensuring that the building components are intact during the construction process and that the building components are installed and constructed normally, thereby saving building materials and reducing construction costs.

[0096] The process of obtaining a path trajectory volume area of ​​the three-dimensional solid model of the construction equipment and determining whether a conflict occurs between the three-dimensional solid model of the construction equipment and the other three-dimensional solid models during movement based on the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment and the volume areas of the other three-dimensional solid models includes:

[0097] Determining whether the three-dimensional solid model of the construction equipment physically overlaps with other three-dimensional solid models during the movement; if the three-dimensional solid model of the construction equipment physically overlaps with other three-dimensional solid models during the movement, then the three-dimensional solid model of the construction equipment conflicts with the other three-dimensional solid models during the movement; if the three-dimensional solid model of the construction equipment does not physically overlap with other three-dimensional solid models during the movement, then the three-dimensional solid model of the construction equipment does not conflict with the other three-dimensional solid models during the movement;

[0098] The process of determining whether the 3D solid model of the construction equipment physically overlaps with other 3D solid models during movement includes:

[0099] Obtain the time t1 when the construction equipment starts moving and the time t2 when the movement ends, evenly divide the time period from t1 to t2 into k1 time points, and record the k1 time points as movement time points, and obtain the axis-aligned bounding boxes of the three-dimensional solid model of the construction equipment at the first movement time point and the second movement time point, and record the volume area of ​​the axis-aligned bounding boxes of the three-dimensional solid model of the construction equipment at the first movement time point and the second movement time point, as well as the volume area swept by the axis-aligned bounding box when moving from the first movement time point to the second movement time point as the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment from the first movement time point to the second movement time point;

[0100] Obtain the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment from the first moving time point to the second moving time point and the volume area of ​​the remaining three-dimensional solid models from the first moving time point to the second moving time point, and record it as the intersection volume area, obtain the volume of each intersection volume area, and set a volume threshold. The volume threshold can be set through experimental data analysis or experience;

[0101] If the volume of the intersection volume area is greater than the volume threshold, the three-dimensional solid model of the construction equipment physically overlaps with the three-dimensional solid model during the movement; if the volume of the intersection volume area is less than or equal to the volume threshold, the three-dimensional solid model of the construction equipment does not physically overlap with the three-dimensional solid model during the movement;

[0102] It should be explained that the three-dimensional solid model of the construction equipment will move during the construction process. Traditional methods only consider the volume area of ​​the three-dimensional solid model of the static construction equipment, and do not consider the area swept by the three-dimensional solid model of the construction equipment during the movement, which may cause misjudgment. It may cause the three-dimensional solid model of the construction equipment to hit an obstacle during the movement but be judged as not hitting the obstacle, thereby causing damage to the equipment, increasing construction costs, and delaying the construction progress. Therefore, the present invention determines whether the three-dimensional solid model of the construction equipment conflicts with the other three-dimensional solid models during the movement through the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment and the volume areas of the other three-dimensional solid models. It accurately determines whether the three-dimensional solid model of the construction equipment hits an obstacle during the movement, thereby avoiding damage to the equipment, reducing construction costs, and ensuring the normal progress of the construction progress.

[0103] A construction project progress change line chart is established, and a progress change coefficient is obtained from the construction project progress change line chart. The process of determining whether there is a slow construction period based on the progress change coefficient includes the following:

[0104] Get the construction project start time t3 and end time t4, divide the time period from t3 to t4 evenly into k2 time points, and record the k2 time points as progress time points. Get the construction project progress at each progress time point. The construction project progress starts at 0 and ends at 100%.

[0105] Establish a blank two-dimensional rectangular coordinate system, set the abscissa of the blank two-dimensional rectangular coordinate system to time, set the ordinate of the blank two-dimensional rectangular coordinate system to the construction project progress, and fill the construction project progress at each progress time point into the blank two-dimensional rectangular coordinate system to obtain the construction project progress mapping points, draw straight lines in chronological order to connect the construction project progress mapping points in sequence, and obtain a construction project progress change line graph;

[0106] Starting from the second construction project progress mapping point, draw a line parallel to the vertical axis through the construction project progress mapping point, and record it as the first progress parallel line; draw a line parallel to the horizontal axis through the previous construction project progress mapping point, and record it as the second progress parallel line;

[0107] The straight line between the construction project progress mapping point and the previous construction project progress mapping point is recorded as the first straight line, the area of ​​the figure enclosed by the first straight line, the first progress parallel line, and the second progress parallel line is obtained, and the area of ​​the enclosed figure is used as the progress change coefficient of the construction project progress mapping point, until the last construction project progress mapping point is reached;

[0108] Set a progress change coefficient threshold. The progress change coefficient threshold can be set through experimental data analysis or experience. If the progress change coefficient of a construction project progress mapping point is less than the progress change coefficient threshold, there is a slow construction period. The time corresponding to the construction project progress mapping point is recorded as t6, and the time corresponding to the previous construction project progress mapping point is recorded as t5. The time period from t5 to t6 is recorded as the slow construction period. If the progress change coefficients from the second construction project progress mapping point to the last construction project progress mapping point are all greater than or equal to the progress change coefficient threshold, there is no slow construction period.

[0109] It needs to be explained that during the operation of the simulated construction project, there may be a period of time when the construction progress changes slowly. If it is not discovered and optimized in time, it may lead to an extension of the construction time of the construction project and reduce the construction efficiency. Therefore, the present invention obtains the progress change coefficient through the construction project progress change line chart, and judges whether there is a period of slow construction based on the progress change coefficient. It accurately determines which time period has slow construction progress, and the relevant personnel perform optimization and adjustment to avoid blind adjustments, thereby ensuring the normal completion of the construction project, or even ahead of schedule, and improving construction efficiency.

[0110] The process of optimizing and adjusting based on risk detection results includes:

[0111] Extract the conflicting 3D solid models, and the relevant personnel will optimize and adjust the construction plans of the pre-selected building projects based on the conflicting 3D solid models to avoid conflicts between the 3D solid models. Extract the slow construction time period, and the relevant personnel will optimize and adjust the construction plans of the pre-selected building projects within the slow construction time period to improve the progress of the construction projects within the slow construction time period.

[0112] In this embodiment, whether conflicts occur between the 3D solid models of building components is determined by the intersection volume between the axis-aligned bounding box of the 3D solid model of the building component and the 3D solid models of the remaining building components. The conflicting 3D solid models are accurately and promptly identified and optimized and adjusted, thereby ensuring that the building components remain intact during construction and that the building components are properly installed and constructed, thereby saving building materials and reducing construction costs. Whether conflicts occur between the 3D solid model of the construction equipment and the remaining 3D solid models during movement is determined by the intersection volume of the path trajectory area of ​​the 3D solid model of the construction equipment and the remaining 3D solid models. Whether the 3D solid model of the construction equipment encounters an obstacle during movement is accurately determined, thereby avoiding damage to the equipment, reducing construction costs, and ensuring the normal progress of construction. A progress variation coefficient is obtained from a line graph of the construction project progress variation. Based on the progress variation coefficient, whether there is a period of slow construction is determined. The period of slow construction progress is accurately determined, and optimization and adjustment are performed by relevant personnel, avoiding blind adjustments, thereby ensuring the normal completion of the construction project, or even ahead of schedule, and improving construction efficiency.

[0113] Example 2

[0114] See also Figure 2 As shown, for the parts not described in detail in this embodiment, please refer to the description of Example 1. A construction plan pre-design method based on AI virtual technology is provided, including:

[0115] Step S1: Acquire architectural drawing data, construction project requirement text data, and historical construction data, parse the construction project requirement text data, and obtain construction project construction requirements;

[0116] Step S2: pre-selecting a construction plan for the construction project based on the construction requirements of the construction project, the architectural drawing data, and the historical construction data; creating a three-dimensional solid model of the construction project based on the architectural drawing data; and simulating the construction operation process of the construction project based on the pre-selected construction plan for the construction project and the three-dimensional solid model of the construction project;

[0117] Step S3: Perform risk detection during the construction operation of the simulated construction project to determine whether conflicts occur between the three-dimensional solid models, establish a construction project progress change line chart, obtain a progress change coefficient from the construction project progress change line chart, and determine whether there is a construction slow period based on the progress change coefficient;

[0118] Step S4: Optimize and adjust based on the risk detection results.

[0119] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0120] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only one type. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0121] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

[0122] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction plan pre-design system based on AI virtual technology, characterized by: The construction scheme pre-design system based on AI virtual technology includes: The data acquisition component is responsible for acquiring architectural drawing data, construction project requirement text data, and historical construction data, and parsing the construction project requirement text data to obtain construction project requirements; The construction plan pre-selection component is responsible for pre-selecting the construction plan of the building project based on the construction requirements of the building project, building drawing data and historical construction data; The construction project simulation operation component is responsible for creating a three-dimensional solid model of the construction project based on the architectural drawing data. The three-dimensional solid model includes construction equipment, building components, and all elements related to the construction of the construction project. The construction operation process of the construction project is simulated based on the pre-selected construction plan of the construction project and the three-dimensional solid model of the construction project; The risk detection component is responsible for performing risk detection during the operation of the simulated construction project, obtaining the axis-aligned bounding box of the three-dimensional solid model of the building component, judging whether there is a conflict between the three-dimensional solid models of the building components through the intersection volume between the axis-aligned bounding box of the three-dimensional solid model of the building component and the three-dimensional solid models of the other building components, obtaining the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment, judging whether there is a conflict between the three-dimensional solid model of the construction equipment and the other three-dimensional solid models during the movement through the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment and the volume area of ​​the other three-dimensional solid models, establishing a construction project progress change line graph, obtaining the progress change coefficient through the construction project progress change line graph, and judging whether there is a period of slow construction based on the progress change coefficient; The optimization and adjustment component is responsible for making optimization and adjustments based on risk detection results.

2. A construction scheme pre-design system based on AI virtual technology according to claim 1, characterized in that: The method of parsing the text data of construction project requirements to obtain construction project requirements includes: Preprocessing the construction project requirement text data, removing headers, footers, page numbers, extra spaces and special symbols in the construction project requirement text data, segmenting the construction project requirement text data according to natural segments, obtaining construction project requirement sub-text data, and completing the preprocessing; Perform named entity recognition on the sub-text data of construction project requirements to obtain the construction requirements of the construction project.

3. The construction scheme pre-design system based on AI virtual technology according to claim 2 is characterized in that: The method for pre-selecting a construction plan for a construction project based on construction requirements of the construction project, building drawing data, and historical construction data includes: Extracting historical building construction requirements and historical building drawing data from the historical construction data, comparing the building construction requirements with the historical building construction requirements, obtaining a similarity between the building construction requirements and the historical building construction requirements, and recording the similarity as a first similarity; comparing the building drawing data with the historical building drawing data, obtaining a similarity between the building drawing data and the historical building drawing data, and recording the similarity as a second similarity; The first similarity and the second similarity are added together to obtain the historical building project construction requirements and historical building drawing data corresponding to the maximum addition result, and these are recorded as the pre-selected building project construction requirements and pre-selected building drawing data. The construction plan of the historical building project corresponding to the pre-selected building project construction requirements and pre-selected building drawing data is used as the construction plan of the pre-selected building project.

4. The construction scheme pre-design system based on AI virtual technology according to claim 3 is characterized in that: The method for simulating the construction operation process of a construction project based on a pre-selected construction plan of the construction project and a three-dimensional solid model of the construction project includes: Create a three-dimensional solid model of the construction project based on the architectural drawing data using 3D software, and place the three-dimensional solid model in the corresponding spatial position according to the architectural drawing data; In the three-dimensional solid model, the operations and processes of each construction stage are defined according to the pre-selected construction plan of the building project. According to the operations and processes of each construction stage, the simulation software is started to simulate the construction operation process of the building project.

5. The construction scheme pre-design system based on AI virtual technology according to claim 4 is characterized in that: The method for determining whether conflicts occur between three-dimensional solid models of building components includes: Determine whether physical overlap occurs between the three-dimensional solid models of the building components. If physical overlap occurs between the three-dimensional solid models of the building components, a conflict occurs between the three-dimensional solid models of the building components. If no physical overlap occurs between the three-dimensional solid models of the building components, no conflict occurs between the three-dimensional solid models of the building components.

6. The construction scheme pre-design system based on AI virtual technology according to claim 5 is characterized in that: The method for determining whether physical overlap occurs between three-dimensional solid models of building components includes: Randomly select two three-dimensional solid models of building components, record them as the first three-dimensional solid model of the building component and the second three-dimensional solid model of the building component, and obtain the spatial coordinates P1 of all vertices of the three-dimensional solid model of the first building component i =(x1 i ,y1 i ,z1 i ), obtaining an axis-aligned bounding box A1A1B1B1 of the first building component three-dimensional solid model according to the spatial coordinates of all vertices of the first building component three-dimensional solid model; Among them, A1A1B1B1=[x1 min ,x1 max ],[y1 min ,y1 max ],[z1 min ,z1 max ]; x1 min =min 1≤i≤n x1 i , x1 max =max 1≤i≤n x1 i , y1 min =min 1≤i≤n y1 i , y1 max =max 1≤i≤n y1 i , z1 min =min 1≤i≤n z1 i , z1 max =max 1≤i≤n z1 i , i is the index of the vertex of the first building component 3D solid model, i=1,2,3,……,n, n is the number of vertices of the first building component 3D solid model, x1 i is the horizontal coordinate of the i-th vertex of the 3D solid model of the first building component, y1 i is the vertical coordinate of the i-th vertex of the 3D solid model of the first building component, z1 i is the vertical coordinate of the i-th vertex of the 3D solid model of the first building component, P1 i is the spatial coordinate of the i-th vertex of the three-dimensional solid model of the first building component; The same method is used to obtain the axis-aligned bounding box A2A2B2B2 of the second building component three-dimensional solid model; Among them, A2A2B2B2=[x2 min ,x2 max ],[y2 min ,y2 max ],[z2 min ,z2 max ]; x2 min =min 1≤j≤m x2 j , x2 max =max 1≤j≤m x2 j , y2 min =min 1≤j≤m y2 j , y2 max =max 1≤j≤m y2 j , z2 min =min 1≤j≤m z2 j , z2 max =max 1≤j≤m z2 j , j is the index of the vertex of the second building component three-dimensional solid model, j = 1, 2, 3, ..., m, m is the number of vertices of the second building component three-dimensional solid model, x2 j is the horizontal coordinate of the jth vertex of the 3D solid model of the second building component, y2 j is the ordinate of the jth vertex of the 3D solid model of the second building component, z2 j is the vertical coordinate of the j-th vertex of the three-dimensional solid model of the second building component; like Then, an intersection volume V(θ12) of the first building component 3D solid model and the second building component 3D solid model is obtained. Otherwise, no physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model. Wherein, θ12=θ1∩θ2; θ1 is the volume area of ​​the three-dimensional solid model of the first building component, and θ2 is the volume area of ​​the three-dimensional solid model of the second building component; An intersection volume threshold is set, and if the intersection volume of the first building component 3D solid model and the second building component 3D solid model is greater than the intersection volume threshold, a physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model; otherwise, no physical overlap occurs between the first building component 3D solid model and the second building component 3D solid model; The same method is used to determine whether there is physical overlap between the three-dimensional solid models of each building component.

7. The construction scheme pre-design system based on AI virtual technology according to claim 6 is characterized in that: The method for determining whether a conflict occurs between the three-dimensional solid model of the construction equipment and other three-dimensional solid models during movement includes: determining whether the three-dimensional solid model of the construction equipment physically overlaps with other three-dimensional solid models during the movement; if the three-dimensional solid model of the construction equipment physically overlaps with other three-dimensional solid models during the movement, then the three-dimensional solid model of the construction equipment conflicts with the other three-dimensional solid models during the movement; otherwise, the three-dimensional solid model of the construction equipment does not conflict with the other three-dimensional solid models during the movement; The process of determining whether the 3D solid model of the construction equipment physically overlaps with other 3D solid models during movement includes: Obtain the time t1 when the construction equipment starts moving and the time t2 when the movement ends, evenly divide the time period from t1 to t2 into k1 time points, and record the k1 time points as movement time points, and obtain the axis-aligned bounding boxes of the three-dimensional solid model of the construction equipment at the first movement time point and the second movement time point, and record the volume area of ​​the axis-aligned bounding boxes of the three-dimensional solid model of the construction equipment at the first movement time point and the second movement time point, as well as the volume area swept by the axis-aligned bounding box when moving from the first movement time point to the second movement time point as the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment from the first movement time point to the second movement time point; Obtain the intersection of the path trajectory volume area of ​​the three-dimensional solid model of the construction equipment from the first moving time point to the second moving time point and the volume area of ​​the remaining three-dimensional solid models from the first moving time point to the second moving time point, and record it as the intersection volume area, obtain the volume of each intersection volume area, and set a volume threshold; If the volume of the intersection volume area is greater than the volume threshold, the three-dimensional solid model of the construction equipment physically overlaps with the three-dimensional solid model during the movement; otherwise, the three-dimensional solid model of the construction equipment does not physically overlap with the three-dimensional solid model during the movement.

8. The construction scheme pre-design system based on AI virtual technology according to claim 7 is characterized in that: The method for determining whether there is a slow construction period based on the progress variation coefficient includes: Get the construction project start time t3 and end time t4, divide the time period from t3 to t4 evenly into k2 time points, and record the k2 time points as progress time points, and obtain the construction project progress at each progress time point; Establish a blank two-dimensional rectangular coordinate system, set the abscissa of the blank two-dimensional rectangular coordinate system to time, set the ordinate of the blank two-dimensional rectangular coordinate system to the construction project progress, and fill the construction project progress at each progress time point into the blank two-dimensional rectangular coordinate system to obtain the construction project progress mapping points, draw straight lines in chronological order to connect the construction project progress mapping points in sequence, and obtain a construction project progress change line graph; Starting from the second construction project progress mapping point, draw a line parallel to the vertical axis through the construction project progress mapping point, and record it as the first progress parallel line; draw a line parallel to the horizontal axis through the previous construction project progress mapping point, and record it as the second progress parallel line; The straight line between the construction project progress mapping point and the previous construction project progress mapping point is recorded as the first straight line, the area of ​​the figure enclosed by the first straight line, the first progress parallel line, and the second progress parallel line is obtained, and the area of ​​the enclosed figure is used as the progress change coefficient of the construction project progress mapping point, until the last construction project progress mapping point is reached; A progress change coefficient threshold is set. If the progress change coefficient of a construction project progress mapping point is less than the progress change coefficient threshold, there is a slow construction period. The time corresponding to the construction project progress mapping point is recorded as t6, and the time corresponding to the previous construction project progress mapping point of the construction project progress mapping point is recorded as t5. The time period from t5 to t6 is recorded as the slow construction period. If the progress change coefficients from the second construction project progress mapping point to the last construction project progress mapping point are all greater than or equal to the progress change coefficient threshold, there is no slow construction period.

9. The construction scheme pre-design system based on AI virtual technology according to claim 8 is characterized in that: The method for optimizing and adjusting according to the risk detection results includes: Extract the conflicting 3D solid models, and the relevant personnel will optimize and adjust the construction plans of the pre-selected building projects based on the conflicting 3D solid models to avoid conflicts between the 3D solid models. Extract the slow construction time period, and the relevant personnel will optimize and adjust the construction plans of the pre-selected building projects within the slow construction time period to improve the progress of the construction projects within the slow construction time period.

10. A construction scheme pre-design method based on AI virtual technology, which is used to implement a construction scheme pre-design system based on AI virtual technology according to any one of claims 1 to 9, characterized in that: include: Step S1: Acquire architectural drawing data, construction project requirement text data, and historical construction data, parse the construction project requirement text data, and obtain construction project construction requirements; Step S2: pre-selecting a construction plan for the construction project based on the construction requirements of the construction project, the architectural drawing data, and the historical construction data; creating a three-dimensional solid model of the construction project based on the architectural drawing data; and simulating the construction operation process of the construction project based on the pre-selected construction plan for the construction project and the three-dimensional solid model of the construction project; Step S3: Perform risk detection during the construction operation of the simulated construction project to determine whether conflicts occur between the three-dimensional solid models, establish a construction project progress change line chart, obtain a progress change coefficient from the construction project progress change line chart, and determine whether there is a construction slow period based on the progress change coefficient; Step S4: Optimize and adjust based on the risk detection results.

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