BIM-based positive-in positive-out rainwater pumping station parameterized model generation system and method

Abstract

The application discloses a BIM-based positive-inlet and positive-outlet rainwater pump station parameterized model generation system and method, S1, a project management module is called to create a rainwater pump station engineering project in a certain area; S2, input of pump station design parameterized data is sequentially completed; S3, an original model of the positive-inlet and positive-outlet rainwater pump station engineering project based on BIM software forward design is opened and guided; S4, the original model of the positive-inlet and positive-outlet rainwater pump station engineering project based on BIM software forward design is selected, an fx function array is used to automatically associate the original model with to-be-generated positive-inlet and positive-outlet rainwater pump station engineering project parameters, and a three-dimensional newly-built model of the positive-inlet and positive-outlet rainwater pump station engineering project based on BIM software forward design is generated; S5, model verification and correction are performed; and S6, visualization processing of the newly-built model of the positive-inlet and positive-outlet rainwater pump station engineering project based on BIM software forward design is performed. The application meets the demand of the positive-inlet and positive-outlet rainwater pump station scheme initial setting stage and can quickly generate a model.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drainage engineering BIM modeling technology, and particularly relates to a positive-inlet and positive-outlet rainwater pumping station parameterized model generation system and method based on BIM forward design. BACKGROUND

[0002] The current traditional rainwater pumping station design method is to reflect the pumping station general plane design, flow chart and pumping station plane and elevation design by using CAD mapping according to the parameters such as pumping station design flow, inlet and outlet water pipeline scale, form, elevation and design water level. Once any parameter changes, it is necessary to re-design, draw and prepare process flow for each parameter change. There are technical problems to be solved such as great changes in preconditions, frequent adjustment of opinions of all parties, short design cycle and the like in the initial design stage of the scheme.

[0003] With the help of BIM technology, the communication cost between process design and architecture and structure can be effectively reduced, and various conveniences can be provided in the later deepening design stage. Parameterization can be cooperated with various finite element and optimization programs. BIM technology and parameterization are the trend of future design.

[0004] BIM technology (Building Information Modeing) is a data-based tool applied to engineering design, construction and management. By integrating various project-related information (model + information) through parameterized models, the information is shared and transmitted in the whole life cycle of project planning, operation and maintenance, so that engineering personnel can correctly understand and efficiently respond to various construction information, and provide a basis for collaborative work for design team, construction team and operation team, and other parties involved in the construction theme, and play an important role in improving production efficiency, saving cost and shortening construction period.

[0005] Parameterized design is a method and means that is increasingly used in the current design field. In actual design tasks, the design work is often basically the same in structure, but the pre-existing water flow conditions, the environment and geological conditions of the site are different. For such design tasks, the amount of repetitive work caused by one-by-one design, drawing and process flow preparation will be quite large. And with the adjustment of the scheme, the amount of correction work is also very large. This not only greatly wastes human and material resources, but also unnecessarily prolongs the design cycle. The idea of parameterized design makes this problem well solved. SUMMARY

[0006] Based on the aforementioned existing technologies, this invention proposes a BIM-based parametric model generation system and method for forward-inlet and forward-outlet stormwater pumping stations. By establishing BIM modeling on the basis of parametric design, the automatic and rapid generation of parametric models for forward-inlet and forward-outlet stormwater pumping stations is realized, including rapid calculation and generation of parameters, rapid model generation by inputting parameters, direct generation of two-dimensional plan views, cross-sectional views, and other related drawings, and generation of engineering quantity tables.

[0007] This invention is achieved using the following technical solution:

[0008] A BIM-based parametric model generation system for forward-inlet and forward-outlet stormwater pumping stations includes:

[0009] The user management module is used to manage the login permissions of different users using the system, allowing users to operate their corresponding engineering projects and connect to the project management module through user login;

[0010] The project management module is used to manage multiple forward-inlet and forward-outlet rainwater pumping station projects created in the system, allowing the forward-inlet and forward-outlet rainwater pumping station projects to be operated by users with project management permissions, and connecting to the data management module by adding parameter data sources;

[0011] The data management module is used to manage data files for multiple forward-inlet and forward-outlet rainwater pumping station projects. Each forward-inlet and forward-outlet rainwater pumping station project corresponds to a set of data parameter files. The data files to be managed are generated and connected to the import / export module.

[0012] The import / export module is used to open and import the original model of the forward-inlet and forward-outlet rainwater pumping station based on BIM software, obtain a list of parameters and data for the project of the forward-inlet and forward-outlet rainwater pumping station, and export the list of data for the project of the forward-inlet and forward-outlet rainwater pumping station based on the parameter data of the project, and connect the project data of the forward-inlet and forward-outlet rainwater pumping station to the generation module.

[0013] The generation module is used to generate a three-dimensional model of a new forward-inlet and forward-outlet rainwater pumping station based on BIM software. Specifically, it generates a three-dimensional model of the forward-inlet and forward-outlet rainwater pumping station and a bill of quantities.

[0014] The BIM model visualization module can locate, browse, modify, search, or perform collision detection on the newly built model of the forward-entry and forward-exit rainwater pumping station based on BIM software.

[0015] A BIM-based method for generating a parametric model of a forward-inlet and forward-outlet stormwater pumping station includes the following steps:

[0016] S1. The user logs into the system and calls the project management module to create a rainwater pumping station project in a certain area;

[0017] S2, call the data management module, manage the data file in a plurality of positive inlet and outlet rainwater pump station engineering projects, each of the positive inlet and outlet rainwater pump station engineering projects corresponds to a set of data parameter files, through the comprehensive use of user input function, default data, read-only data, calculation formula prefabrication and other ways, including sequentially completing the input of pump station design key data;

[0018] S3, call the export / import module, open the positive inlet and outlet rainwater pump station original model based on BIM software under the current directory and import, get the positive inlet and outlet rainwater pump station engineering project parameter data list, the user fills out and checks without error, and exports the positive inlet and outlet rainwater pump station engineering project data list file based on the parameter data of the positive inlet and outlet rainwater pump station;

[0019] S4, call the generation module, select the positive inlet and outlet rainwater pump station engineering project original model based on BIM software forward design, automatically associate the generated positive inlet and outlet rainwater pump station engineering project parameters to the original model through fx function array, and give the model corresponding control size combined with the parameter data set by the water collection area and flow of the pump station, generate a three-dimensional positive inlet and outlet rainwater pump station engineering project new model based on BIM software forward design, the new model includes generating two-dimensional engineering drawing and bill of quantities; and according to the demand, select to generate engineering drawing including plan, elevation, section and detailed drawing at the same time;

[0020] S5, model verification, judge whether the three-dimensional BIM model meets the design requirements: if it meets the design requirements, the positive inlet and outlet rainwater pump station engineering project new model based on BIM software forward design is generated; if it does not meet the design requirements, return to step S2 and use the data management module to correct the parameters;

[0021] S6, call the BIM visualization module, perform visualization dynamic positioning, browsing, modification, searching or collision detection on the positive inlet and outlet rainwater pump station engineering project new model based on BIM software forward design in three-dimensional view.

[0022] Compared with the traditional technology, the present application can achieve the following beneficial technical effects:

[0023] 1) Using more intuitive operation, the software can be used conveniently, the problem of automatically establishing rainwater pump station is solved, the parameters are quickly calculated and generated, and the BIM model is quickly generated by inputting parameters; the research and application conform to the demand of the initial setting stage of the positive inlet and outlet rainwater pump station scheme, and the model can be quickly generated.

[0024] 2) The interface design software technology is used, the problems of unclear existing data calculation, easy to delete, not closely related before and after, and human error are solved, and the work efficiency is improved;

[0025] 3) The visualization features of BIM 3D technology and virtual scene roaming technology are used to present the spatial relationship of the rainwater pumping station, forming an auxiliary design and analysis collaboration platform. This enables all parties involved in the construction to clearly understand the project, realize the design and simulation of the model, and serve as a model guide for the detailed design of construction drawings. Attached Figure Description

[0026] Figure 1 This is a block diagram of the BIM-based parametric model generation system for forward-inlet and forward-outlet rainwater pumping stations according to the present invention.

[0027] Figure 2 This is a flowchart of an embodiment of the BIM-based parametric model generation method for forward-inlet and forward-outlet rainwater pumping stations of the present invention.

[0028] Figure 3 Example screenshot of the interface for the pump station parameter design tool version 1.0;

[0029] Figure 4 A screenshot of the interface showing the parameter mapping table for the fx function;

[0030] Figure 5 Example diagram of assigning values ​​to the fx function;

[0031] Figure 6 Example diagram of a rainwater pumping station model with forward inlet and forward outlet;

[0032] Figure 7 This is a two-dimensional model of a rainwater pumping station with a positive inlet and outlet. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments, and the technical solutions in the embodiments of the present invention will be described completely and clearly. Obviously, the embodiments described are only some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0034] The technologies involved in the technical solution of this invention include: ① three-dimensional model generation technology for forward-inlet and forward-outlet rainwater pumping stations; ② calculation algorithm technology for similar forward-inlet and forward-outlet rainwater pumping stations; ③ parameter design tool generation technology; and ④ engineering drawing generation technology for forward-inlet and forward-outlet rainwater pumping stations.

[0035] like Figure 1 The diagram shows the module diagram of the BIM-based parametric model generation system for forward-inlet and forward-outlet stormwater pumping stations according to the present invention. The system includes a user management module 100, a project management module 200, a data management module 300, an import / export module 400, and a generation module 500. Wherein:

[0036] The user management module 100 operates on users. This module is used to manage the login permissions of different users using the system, allowing users to operate their corresponding engineering projects and connect to the project management module 200 through user login.

[0037] The operation object of the project management module 200 is the engineering project, which is used for managing a plurality of positive-inlet and positive-outlet rainwater pumping station engineering projects created in the system, allowing the positive-inlet and positive-outlet rainwater pumping station engineering projects to be operated by users with project management permissions, and connecting to the data management module 300 by adding a parameter data source;

[0038] The operation object of the data management module 300 is the engineering project parameter, which is used for managing a plurality of data files in the positive-inlet and positive-outlet rainwater pumping station engineering projects, each of the positive-inlet and positive-outlet rainwater pumping station engineering projects corresponding to a set of data parameter files, and connecting to the import / export module 400 by generating a data file to be managed through the comprehensive use of user input functions, default data, read-only data, and calculation formula prefabrication;

[0039] The operation object of the import / export module 400 is the data file, which is used for opening the original model of the positive-inlet and positive-outlet rainwater pumping station based on the BIM software under the current directory and importing it to obtain a positive-inlet and positive-outlet rainwater pumping station engineering project parameter data list, and exporting a positive-inlet and positive-outlet rainwater pumping station engineering project data list file (for example, in an xls format) based on the parameter data of the positive-inlet and positive-outlet rainwater pumping station, and connecting to the generation module 500 through the positive-inlet and positive-outlet rainwater pumping station engineering project data;

[0040] The operation object of the generation module 500 is the new model of the positive-inlet and positive-outlet rainwater pumping station based on the BIM software, which is used for generating a three-dimensional new model of the positive-inlet and positive-outlet rainwater pumping station based on the BIM software, specifically, generating a positive-inlet and positive-outlet rainwater pumping station three-dimensional model and a bill of quantities, and simultaneously generating engineering drawings including a plan, an elevation, a section, and a detailed local drawing according to requirements;

[0041] The BIM model visualization module 600 is used for positioning, browsing, modifying, searching, or collision detection of the visualized new model of the positive-inlet and positive-outlet rainwater pumping station based on the BIM software, and the rainwater pumping station model in the three-dimensional view interface is zoomed in and out, dragged, and rotated through mouse operation, and at the same time, in order to facilitate the viewing of the internal BIM model of the rainwater pumping station, the module further includes functions such as local hiding, display, three-dimensional sectioning, and model transparency.

[0042] As shown in Figure 2 The flow chart of the BIM-based positive-inlet and positive-outlet rainwater pumping station parameterized model generation method of the present application is shown in the figure. The specific steps are as follows:

[0043] S1, the user logs in to the system and calls the project management module to create a rainwater pumping station engineering project in a certain area;

[0044] S2, call the data management module, manage the data files in multiple positive-in positive-out rainwater pump station engineering projects, each of the positive-in positive-out rainwater pump station engineering projects corresponds to a set of data parameter files, through the comprehensive use of user input function, default data, read-only data, calculation formula prefabrication and other ways, such as including sequentially completing the input of key data such as pump station design total flow, number of pumps, single pump flow, inlet side channel height, inlet side channel width, number of inlet pipes, inlet pipe length, and inlet pipe bottom elevation,

[0045] Among them, the source of key data includes user input data, system default data and read-only data (calculated automatically according to formula). For data with high repetition rate, such as pump barrel wall thickness, cable trench thickness, and inlet bottom grid slope allowance, which are basically stable in structure design, they have been preset in the system and do not need to be redesigned;

[0046] The design parameters of the positive-in positive-out rainwater pump station mainly include the total service area of the pump station according to the planning of the region, the size of the pump station, and the flow direction of the inlet and outlet pipes. The total flow of the pump station, the number and size of the pump, the number and size of the inlet and outlet pipes or side channels, and the number and size of the grid are determined;

[0047] S3, call the export / import module, open the original model of the positive-in positive-out rainwater pump station based on the BIM software in the current directory and import it, get the positive-in positive-out rainwater pump station engineering project parameter data table, and fill in the data after checking, based on the parameter data of the positive-in positive-out rainwater pump station, export the positive-in positive-out rainwater pump station engineering project data table file (such as fx1-1.xlsx file); That is, fill in the parameter values in the "data file production tool" interface, and export the data file;

[0048] As Figure 3 shown, it is a pump station parameter design tool 1.0 version interface example. For example: this tool is used to generate Excel format data file. The table lists the parameters needed to generate the pump station model, which is divided into three categories: data that needs to be input by the user, default data and read-only data. The user inputs the corresponding data in the table according to the project information. For default data, the user can choose to use default data or change it. Read-only data is exported data and cannot be changed by the user. After the user fills in the data and checks it, click the "export" button to generate the fx1-1.xlsx file in the current directory;

[0049] S4, call the generation module, select the positive-inlet and positive-outlet rainwater pumping station engineering project original model based on the forward design of BIM software, automatically associate the generated positive-inlet and positive-outlet rainwater pumping station engineering project parameters with the original model (for example, in the form of an Excel parameter table) through the fx function array, and give the model corresponding control size by combining the parameter data set by the catchment area and flow of the pumping station, generate a three-dimensional new model of the positive-inlet and positive-outlet rainwater pumping station engineering project based on the forward design of BIM software, which includes generating two-dimensional engineering drawings and engineering quantity tables; the parameter linking mode of the fx function can quickly lock the parameter position. When creating the model, the sketch must be completely constrained to ensure that the sketch has zero degrees of freedom. The way the sketch can change size or shape is called degrees of freedom. For example, a circle has two degrees of freedom: the center and the radius. After the center and the radius are defined, the circle is completely constrained. If all degrees of freedom are eliminated by applying constraints or dimensions, the sketch will be completely constrained. Through the fx parameter table of the module, users can define and edit the size relationship of graphic elements in the model. In the model parameters, the relationship between two size variables with mutual relationship can be expressed by mathematical relationship, so that when one size changes, the other related size also changes accordingly. The user parameters and model parameters are associated through the equation in the parameter table, so that when the parameter list modifies the user parameters, the corresponding model parameters also change, thereby driving the model to change and realizing parameterized design of the model. As shown in Figure 4

[0050] In addition, according to the requirements, the engineering drawings including plan, elevation, section, and detailed drawing are generated at the same time;

[0051] S5, model verification, judge whether the three-dimensional BIM model meets the design requirements: if it meets the design requirements, the new model of the positive-inlet and positive-outlet rainwater pumping station engineering project based on the forward design of BIM software is generated; if it does not meet the design requirements, return to step S2 and use the data management module to correct the parameters;

[0052] S6, call the BIM visualization module, and perform visualization dynamic positioning, browsing, modification, searching, or collision detection of the new model of the positive-inlet and positive-outlet rainwater pumping station engineering project based on the forward design of BIM software in the three-dimensional view. Collision detection is to find conflicts between parts in the model by using BIM model detection tools for timely adjustment.

[0053] ​Specifically, this invention uses the original design data of a basic stormwater pumping station to parametrically design a forward-inlet, forward-outlet stormwater pumping station model. During the design phase, a forward-inlet, forward-outlet foundation type is selected, foundation parameters are designed, and a cross-sectional sketch of the pumping station is drawn in a sketching environment. When creating the sketch, a basic outline constraint sketch should be drawn according to its structural characteristics, and then dimensions are added. Dimensions are assigned using parametric expressions; the parameters are listed by clicking to assign values. Each component of the model is built using relevant model parameters and features. The 3D model built through these parameters is accurate and facilitates later simulations and interference checks.

[0054] Specifically, a new model is generated based on the design data of the newly built rainwater pumping station, building upon the original basic model.

[0055] For newly built stormwater pumping stations, import a new Excel parameter table. Parameters control the model dimensions, and thus the shape of the pumping station. Adjustments to the parameter table can be used to optimize the design or quickly generate a new pumping station model. However, once the parameter file is changed, the generated new model will replace the original design model. If you want to retain design data from multiple models in a product series for later verification and optimization, you can use different folders to store different model data. Create a separate project file in each folder, copy the basic model and parameter table of the forward-designed forward-inlet stormwater pumping station project based on BIM software to the new folder, and then modify the parameter table data to quickly obtain a new pumping station model.

[0056] Specifically, based on the stormwater pumping station model file, two-dimensional engineering drawings are output. The system directly converts three-dimensional models to two-dimensional engineering drawings and can create projections, sectional views, and partial views of the engineering drawings as needed. With the widespread application of BIM technology, the design delivery system, which primarily uses two-dimensional drawings as the information carrier, will gradually transition to a delivery system based on the BIM model and associated with it to generate two-dimensional views. This is the overall trend and direction of drawing delivery under the BIM model. Furthermore, the generated engineering drawings are linked to the dimensions of the three-dimensional model; when the parameters of the three-dimensional model change, the engineering drawings are automatically updated. This achieves the goal of updating everything after a change in one place.

[0057] Specifically, based on the stormwater pumping station model file, a two-dimensional quantity table is output. After outputting this table, users can not only view and compile necessary information, but also directly modify model components through the detailed schedule. BIM technology optimizes cost estimation; traditional algorithms for calculating the main structure are too cumbersome, while Revit software allows for one-click generation of quantity statistics tables, accurately and quickly generating them. This significantly reduces the time spent on quantity calculations. It greatly benefits cost accounting, enabling multi-dimensional summary and analysis of cost reports.

[0058] like Figure 5The image shown is an example of assigning a value to the fx function. The process of assigning a value to the fx function is described as follows:

[0059] In the BIM software sketch environment, draw a cross-sectional sketch of the pump station. When creating the sketch, draw a basic outline constraint sketch according to its structural characteristics, and then add dimensions. Dimensions should be assigned using parametric expressions; click "List Parameters" to assign values. After completing the sketch, use the solid command to create a 3D solid model, where the solid command is also assigned values ​​using parametric expressions. Each component of the model is built using relevant model parameters and features. A 3D model built using parameters is accurate and facilitates later simulations and interference checks.

[0060] Taking a stormwater pumping station project in a certain region as an example, this embodiment is a typical forward-inlet, forward-outlet stormwater pumping station project. The project parameters include, for example, a total design flow rate Q of 14.5 m³ / h. 3 / s, using 6 pumps, each with a flow rate of 2.42m³ / s. 3 The water inlet adopts a culvert design, with a height of 2m and a width of 2m. There are 4 inlet pipes and 4 outlet pipes with a diameter of 1.8m. The flow velocity is 1.42526m / s, meeting the specification requirement of <1.5m / s. A parametric model generation system for forward-inlet and forward-outlet stormwater pumping stations based on BIM software was used to create the stormwater pumping station model and generate 2D engineering drawings and a bill of quantities.

[0061] like Figure 6 The image shown is an example model of a stormwater pumping station with a forward inlet and forward outlet. Figure 7 The image shown is a two-dimensional model of a forward-inlet, forward-outlet stormwater pumping station. The original model of the forward-inlet, forward-outlet stormwater pumping station based on BIM software and the newly built model of the same type of stormwater pumping station based on BIM software share the same model example and two-dimensional diagram.

[0062] Table 1 shows the quantity table generated for the model of the forward-in, forward-out stormwater pumping station. It displays the detailed quantities for various categories of quantities, such as type, family, family and type, and elevation.

[0063] ① The term "type" represents the specification name and dimensions of the component model. For example, "standard" in the type indicates a national standard component included in the BIM software; "flap gate DN1200" in the type indicates that the size of the flap gate is DN1200mm, which is the specification name and dimensions of the component.

[0064] ② A "family" is a class of graphic elements within a certain category. It groups graphic elements based on shared parameter (attribute) sets, identical usage, and similar graphical representation. Different graphic elements within a family may have some or all different attribute values, but the attribute settings are the same. For example, "Flange-Flat Weld-Steel-150 lb Class" within a family represents the model of a national standard component; "Flap Gate DN1200" within a family represents the name of the family.

[0065] ③ The term "family and type" refers to the combined representation of family name and type in BIM software, allowing for quick and clear retrieval of component model details during data searches. For example, "Flange-Flat Weld-Steel-150 lb Class: Standard" in the Family and Type section represents the family name and model of a national standard component; similarly, "Flap Gate DN1200: Flap Gate DN1200" represents the family name and model.

[0066] ④ The term "elevation" here refers to absolute elevation: it is an elevation with a reference surface uniformly defined by a country or region as the zero point. In my country, the average sea level of the Yellow Sea near Qingdao is used as the zero point for elevation calculations, and the resulting elevation is called absolute elevation. For example, "-0.330 Inlet Flap Gate" indicates that the model is located at an elevation of -0.330m. "Inlet Flap Gate" is an explanatory term indicating the center position of the main equipment flap gate. Similarly, "2.3 Pool Top" indicates that the model is located at an elevation of 2.3m. "Pool Top" is an explanatory term indicating the position of the top slab of the inlet pool.

[0067] ⑤ In the total, for example, "6" indicates that the number of families used in this model is 6.

[0068] Table 1

[0069]

[0070]

[0071]

Claims

1. A BIM-based parametric model generation system for a positive in-positive out rainwater pumping station, characterized in that, Comprise: A user management module for managing the login permissions of different users using the system, allowing users to operate their corresponding engineering projects, and connecting to the project management module through user login; The project management module is used to manage a plurality of positive-in positive-out rainwater pumping station engineering projects created in the system, allowing the positive-in positive-out rainwater pumping station engineering projects to be operated by users with project management permissions, and connecting to the data management module through the addition of parameter data sources; The data management module is used to manage data files in a plurality of positive-in positive-out rainwater pumping station engineering projects, each of which corresponds to a set of data parameter files, and is connected to the import / export module by generating data files to be managed, and through the comprehensive use of user input functions, default data, read-only data, and calculation formula presets, including sequentially completing the input of pumping station design key data, which is designed according to the total service area of the pumping station, the size of the pumping station, and the flow direction of the inlet and outlet water pipes, and at least includes the total flow of the pumping station design, the number and size of the pump selection, the number and size of the inlet and outlet water pipes or square culverts, and the number and size of the grating; The import / export module is used to open and import the original model of the positive-in positive-out rainwater pumping station based on BIM software, obtain the positive-in positive-out rainwater pumping station engineering project parameter data list, and export the positive-in positive-out rainwater pumping station engineering project data list file based on the parameter data of the positive-in positive-out rainwater pumping station, and connect to the generation module through the positive-in positive-out rainwater pumping station engineering project data; The generation module is used to generate a three-dimensional new model of the positive-in positive-out rainwater pumping station based on BIM software, specifically, a positive-in positive-out rainwater pumping station three-dimensional model and a bill of quantities; The BIM model visualization module is used to position, browse, modify, search or collision detect the visualized new model of the positive-in positive-out rainwater pumping station based on BIM software.

2. A BIM-based parameterized model generation method for a positive-in-positive-out rainwater pumping station, characterized in that, Comprise the following steps: S1, the user logs in to the system, calls the project management module to create a rainwater pumping station engineering project in a certain area; S2, call the data management module to manage data files in a plurality of positive-in positive-out rainwater pumping station engineering projects, each of which corresponds to a set of data parameter files, and through the comprehensive use of user input functions, default data, read-only data, and calculation formula presets, including sequentially completing the input of pumping station design key data; Pumping station design key data is designed according to the total service area of the pumping station, the size of the pumping station, and the flow direction of the inlet and outlet water pipes, and at least includes the total flow of the pumping station design, the number and size of the pump selection, the number and size of the inlet and outlet water pipes or square culverts, and the number and size of the grating; S3, call the export / import module, open the original model of the positive-in positive-out rainwater pumping station based on BIM software in the current directory and import it, obtain the positive-in positive-out rainwater pumping station engineering project parameter data list, and after the user fills it out and checks it, export the positive-in positive-out rainwater pumping station engineering project data list file based on the parameter data of the positive-in positive-out rainwater pumping station; S4, calling the generation module, selecting the original model of the positive-inlet and positive-outlet rainwater pumping station project based on the BIM software forward design, automatically associating the to-be-generated positive-inlet and positive-outlet rainwater pumping station project parameters to the original model through the fx function array, and giving the model corresponding control sizes in combination with the parameter data set by the catchment area and flow of the pumping station, to generate a three-dimensional new model of the positive-inlet and positive-outlet rainwater pumping station project based on the BIM software forward design, which includes generating a two-dimensional engineering drawing and a bill of quantities; and according to the requirements, selecting to generate an engineering drawing including a plan, an elevation, a section, and a detailed local drawing at the same time; S5, model verification, judging whether the three-dimensional BIM model meets the design requirements: if it meets the design requirements, the new model of the positive-inlet and positive-outlet rainwater pumping station project based on the BIM software forward design is generated; if it does not meet the design requirements, returning to step S2 to correct the parameters by using the data management module; S6, calling the BIM visualization module, performing visualization dynamic positioning, browsing, modifying, searching, or collision detection of the new model of the positive-inlet and positive-outlet rainwater pumping station project based on the BIM software forward design in a three-dimensional view.

3. The BIM-based positive-in-positive-out rainwater pump station parameterized model generation method of claim 2, wherein, The parameter position is locked by using the parameter linkage mode of the fx function array.

4. The BIM-based positive-in-positive-out rainwater pump station parameterized model generation method of claim 2, wherein, A separate project file is established in each folder, the basic model and parameter table of the positive-inlet and positive-outlet rainwater pumping station project based on the BIM software forward design are copied to the new folder, and the parameter table data is modified to quickly obtain a new pumping station model.

5. The BIM-based positive-in positive-out rainwater pump station parameterized model generation method of claim 2, wherein, When the parameters are changed, the engineering drawing of the new model of the positive-inlet and positive-outlet rainwater pumping station project based on the BIM software forward design can also be automatically updated.

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