Fabricated low-rise building system based on modular design and construction method

Abstract

An assembly type low-rise building system based on modular design comprises a design module, a supply module and a construction module, and is characterized in that the design module adopts a 600mm basic modulus to set a building main body, building materials and building nodes, and the building main body, the building materials and the building nodes form a multiple relation with the 600mm basic modulus; the design module is used for generating an overall building scheme and generating a bill of materials based on a 600mm basic modulus, the supply module is used for generating a production order and providing a logistics plan based on the bill of materials, and the construction module is used for performing field assembly according to the overall building scheme; compared with the prior art, through the design of the design module, the supply module and the construction module, linkage of building design, structural design, a production process and current assembly is achieved, and an efficient, environment-friendly and low-cost low-rise building industrial construction path is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transmission control technology, in particular to a prefabricated low-rise building system based on analog design and a construction method. BACKGROUND

[0002] Prefabricated buildings are an important development direction of the current construction industry, and the core is to transfer the traditional on-site construction components to the factory for prefabrication, and then transport them to the site for assembly.

[0003] At present, the prefabricated building field in the market is facing the problems of design and construction information fragmentation, low component standardization, insufficient supply chain cooperation, and low efficiency of on-site assembly. Under the traditional mode, there is a lack of unified information platform and standards between the stages of demand, design, procurement, construction, acceptance and delivery, which leads to the fact that the design results cannot be accurately converted into on-site construction plans, thereby causing delays in project progress and difficulties in quality assurance. At the same time, the component standardization rate of less than 45% makes the production cost high, and the dispersed procurement and logistics management further exacerbate the problems of delayed material supply and chaotic inventory, which affects the overall building quality and seismic performance. At the same time, the characteristics of the market mainly manifest in the solidification of traditional construction processes and the widespread existence of customized design.

[0004] Most enterprises still rely on the linear mode of “demand – design – procurement – construction – acceptance – delivery”, and lack of integrated digital platform for collaborative management of the entire engineering process. At the same time, building components are mainly customized, which makes it difficult to achieve mass production and factory assembly, and a large amount of manual adjustment is required on the construction site. In addition, the supply chain, production, logistics and other links are independent of each other, and the information island phenomenon is serious, which makes the engineering management efficiency low and the cost difficult to effectively control. It is urgent to transform and upgrade through standardized and information-based means.

[0005] Chinese patent CN116341354A discloses a prefabricated steel structure ultra-low energy consumption building multi-objective optimization design method and platform, which includes the following parts: according to the structural characteristics of prefabricated steel structure, parameterized design research and BIM dynamic model automatic modeling are carried out; considering the influence of building envelope structure material parameters on building energy consumption, a variety of artificial intelligence algorithms are used to complete the prediction of building energy consumption, and through comparison, an efficient and accurate building energy consumption prediction method is obtained and variable importance analysis is carried out; considering the bearing capacity constraint condition of the structure, a multi-objective optimization algorithm is used to carry out multi-objective optimization design of prefabricated steel structure ultra-low energy consumption building.

[0006] The above-mentioned design platform automatically outputs a logically accurate steel frame model by inputting the total length, total width and number of floors of the building. However, after obtaining the steel frame model, this output method still requires the design of the internal interior structure and electromechanical system based on the actual steel frame, and the calculation of costs based on all components and the procurement or preparation of each part, which affects the overall construction efficiency. Summary of the Invention

[0007] The present invention aims to overcome the above-mentioned defects in the prior art and provide a prefabricated low-rise building system and construction method based on modular design with a high degree of standardization and sufficient resource integration.

[0008] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical scheme: an assembled low-rise building system based on modular design, including a design module, a supply module and a construction module, characterized in that the design module adopts a 600mm basic module to set the building body, building materials, and building nodes, and the building body, building materials, and building nodes all form a multiple relationship with the 600mm basic module; the design module generates an overall building plan and a bill of materials based on the 600mm basic module, the supply module generates a production order based on the bill of materials and provides a logistics plan, and the construction module performs on-site assembly according to the overall building plan.

[0009] As a preferred solution of the present invention, a module formula M_b = 600×2^n(n∈N) is formulated based on the 600mm basic module, where M_b is the module level of the building material, 5≥n≥0, and n is a natural number.

[0010] As a preferred solution of the present invention, the required size of the building body can be combined with building materials of different modular levels.

[0011] As a preferred solution of the present invention, the design module assembles building materials of different modular levels to form an overall building plan, and calculates the total cumulative error according to the formula ΣΔb ≤ T_m / 3, where Δb is the cumulative error of building materials of a single modular level, ΣΔb is the cumulative error of building materials of multiple different modular levels, and T_m is the maximum error allowed for the entire building.

[0012] As a preferred solution of the present invention, the design module generates an overall building plan based on the 600mm basic module, and simultaneously generates corresponding architectural drawings, structural drawings, interior drawings and electromechanical equipment drawings based on the 600mm basic module.

[0013] As a preferred solution of the present invention, the design module includes an extraction submodule for extracting building structural nodes, and connection modes between the enclosure structure and the layered steel structure.

[0014] As a preferred scheme of the present application, the supply module comprises a database for classifying the building materials of different module levels.

[0015] As a preferred scheme of the present application, the database is provided with a sub-module for itemizing the building materials and a sub-module for aggregating the costs.

[0016] As a preferred scheme of the present application, the itemizing sub-module divides the building materials into prefabricated parts and customized parts, and the production order comprises preparing the prefabricated parts and purchasing the customized parts.

[0017] A construction method of a fabricated low-rise building system based on modular design, based on the fabricated low-rise building system based on modular design according to any one of claims 1-9, comprising the following steps: Step S1: receiving an order and designing a scheme, according to the submitted building order, designing an overall building scheme and a corresponding bill of materials under a 600mm base module; Step S2: classifying various building materials according to the bill of materials, preparing prefabricated parts and purchasing customized parts according to the required building materials, and generating a cost list according to the required prefabricated parts and purchased parts; Step S3: on-site assembly of prefabricated parts and purchased parts according to the overall building scheme in S1.

[0018] Compared with the prior art, by designing the modules of design, supply and construction, the linkage of building design, structural design, production process and present assembly is realized, realizing an efficient, environmentally friendly and low-cost industrialized construction path of low-rise buildings, and converting the traditional building mode from demand-design-purchase-construction-inspection-delivery to product and market analysis-architectural system research and development-product design of all parts and components-process operation guide-book-production process design-automated production-standard house type design-preparation of BOM list of all components-CRM system project front-end requirements-ERP system automatic order splitting-supply chain system to execute procurement and MES system to call processing technology package for automated production-logistics system to accurately organize logistics-construction-inspection-delivery, reducing the difficulty of delivering buildings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a flowchart of the design module, the supply module and the construction module; Figure 2 is a flowchart of the design module and the supply module; Figure 3 is a schematic diagram of the design module for the design of the main body of the building; Figure 4 is a schematic diagram of building materials of different module levels; Figure 5is a building material assembly schematic under the same base module; Figure 6 is a flowchart of the supply module; Figure 7 is a flowchart of the bill of materials making; Figure 8 is a flowchart of the cost list making of the purchased parts; Figure 9 is a flowchart of the cost list making of the prefabricated parts; The figure mark: design module 1, overall building scheme 11, bill of materials 12, supply module 2, database 21, sub-module 22, sub-module 23, construction module 3. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0021] As Figures 1-9 shown, a modular design-based prefabricated low-rise building system includes a design module 1, a supply module 2 and a construction module 3, the design module 1 sets up a building main body, building materials and building nodes using a 600mm base module, and the building main body, building materials and building nodes all form a multiple relationship with the 600mm base module; the design module 1 generates an overall building scheme 11 and a bill of materials 12 based on the 600mm base module, the supply module 2 generates a production order and provides a logistics plan based on the bill of materials 12, and the construction module 3 performs on-site assembly according to the overall building scheme 11.

[0022] A module formula M_b = 600×2^n (n∈N) is formulated according to the 600mm base module, where M_b is the module level of the building materials, 5≥n≥0, and n is a natural number.

[0023] 600mm is the base module, which is an initial value set based on ergonomics, material specifications and industrial production requirements, and this value meets the following engineering conditions: adapting to standard board size, complying with ISO 2848 building module coordination standards, and ensuring reasonable division of building space and functional zoning.

[0024] 2^n is a binary expansion factor, which ensures that the module system is expanded by a geometric progression, and effectively classifies the building materials, for example, building materials with n=0→ M_b=600mm can be used as a basic unit of a first-level module, building materials with n=1→ M_b=1200mm can be used as a basic functional unit of a second-level module, and building materials with n=2→ M_b=2400mm can be used as a spatial combination unit of a third-level module, and n_max is determined by the building span limit (generally n≤5, corresponding to 9600mm).

[0025] n∈N: Natural number constraint condition, refers to the index only takes non-negative integer (n≥0), to ensure the modulus step growth rather than continuous change, to avoid the emergence of 17.3mm class non-standard cutting size.

[0026] The required size of the building body can be combined with different modulus levels of building materials, for example, when the designed building body is 3.6m (3600mm) high, through formula back calculation: 3600 = 600×2^n → n=log2(6)=2.584 (invalid) correction selection: according to the combination rule, M_b=600×2²=2400mm is selected as the single module height, and the remaining 1200mm can be decomposed into two basic units of 600mm×2 or one basic functional unit of 1200mm.

[0027] Design module 1 assembles different modulus levels of building materials to form the overall building scheme 11, and calculates the total cumulative error according to the formula ΣΔb ≤ T_m / 3, where Δb is the cumulative error of the building material of a single modulus level, ΣΔb is the cumulative error of multiple different modulus levels of building materials, and T_m is the maximum error allowed for the overall building.

[0028] / 3 is the error allocation coefficient, indicating that the system level error needs to be controlled within one third of the final deviation, which meets the "one-third rule" of system engineering, ensuring that even if all links are produced according to the limit error, it will not exceed the total tolerance limit.

[0029] Assuming three modulus levels (n=0→2), the manufacturing error Δ_manufacture=0.15mm: ΣΔb = Δ1 + √(Δ2²+Δ3²) = 0.15 + √(0.15²+0.15²) = 0.15 + 0.212 = 0.362mm Requirement: ΣΔb ≤ T_m / 3 → T_m ≥ 1.086mm, the design selects the actual T_m=1.2mm, which is a confirmation formula for tolerance allowance.

[0030] Design module 1 generates the overall building scheme 11 based on the 600mm base modulus, and simultaneously generates the corresponding architectural drawings, structural drawings, interior drawings and mechanical and electrical equipment drawings based on the 600mm base modulus.

[0031] The architectural drawings include the layout of the house and the detailed drawing of the construction node. The layout of the house is based on the fixed modulus principle, and the design of the building plane layout, elevation segmentation and layer height adjustment includes the arrangement scheme of walls, doors, windows and floor slabs. The detailed drawing of the construction node generates standardized construction nodes, such as the connection method of external wall and foundation, floor and steel beam.

[0032] The structural drawing includes structural deepening drawing and enclosure connection drawing. The structural deepening drawing generates a steel structure frame layout and deepening drawing in combination with architectural design, including positioning of columns, beams and nodes. The enclosure connection drawing draws a connection detail drawing of steel structure and enclosure components (such as external wall panels and roof panels) according to the modular design principle.

[0033] The interior drawing includes interior layout drawing and interior node detail drawing. The interior layout drawing includes partition wall layout drawing, floor paving drawing and ceiling layout drawing. All interior components are designed based on prefabrication to ensure compatibility of modular interfaces with the building body. The interior node detail drawing generates detailed node drawings for special positions, such as the junction of interior walls and floors, the connection of ceiling and walls, etc.

[0034] The mechanical and electrical equipment drawing includes equipment layout drawing and pipeline comprehensive drawing. The equipment layout drawing arranges electrical, water supply and drainage and ventilation and air conditioning system equipment according to the building and structure design. The pipeline comprehensive drawing optimizes the mechanical and electrical pipeline layout to avoid conflicts with the building and structure design, and marks the reserved hole and support positions.

[0035] The design module 1 includes an extraction submodule for extracting building construction nodes, enclosure structure and layered steel structure connection methods. Under the extraction of the extraction submodule, the preliminary framework of the interior system interface and the mechanical and electrical system layout is determined.

[0036] The supply module 2 includes a database 21 for classifying various modular level building materials.

[0037] The supply module 2 includes a sub-item submodule 22 for sorting building materials and a totalizing submodule 23 for totalizing costs.

[0038] The database 21 comprehensively covers various material information involved in engineering construction, providing a comprehensive and accurate data basis for subsequent cost list generation. According to different construction needs and design requirements, the materials are modularly sorted to form a logically clear sub-item list. Meanwhile, according to structure deepening, enclosure structure deepening and interior deepening (including deepening of roof, floor and wall, etc.), combined with equipment pipeline classification and detailed design of components, the totalizing program statistically processes and merges the sorted sub-item list to generate an overall material list summary table. This step ensures the completeness and accuracy of the list content, while reducing the possibility of repeated statistics.

[0039] The sub-item submodule 22 details the material types, specifications, quantities and related information under each classification item, which is suitable for material management of construction segmentation or single operation. The totalizing submodule 23 integrates the statistical results of all sub-item lists to provide comprehensive overview information, which is suitable for global material allocation and procurement management. The output cost list is also input to the construction node and component database 21.

[0040] The sub-module 22 divides the building materials into prefabricated parts and customized parts, and the production order includes the preparation of prefabricated parts and the procurement of customized parts.

[0041] A construction method of a modular design-based prefabricated low-rise building system, based on the modular design-based prefabricated low-rise building system of any one of claims 1-9, comprising the following steps: Step S1: receiving orders and designing schemes, according to the submitted building order, the server first matches the standard scheme in the existing construction library, if it cannot meet the demand, it starts a new design module to generate a scheme, and imports the server, designs the overall building scheme 11 and the corresponding bill of materials 12 under the basis of 600mm module, and sends the overall building scheme 11 and the corresponding bill of materials 12 to the supply module 2 through the server.

[0042] In the import design scheme, the building size required for construction is received through the data interface, a new overall building scheme 11 is selected or generated and imported into the server, the building construction node, the connection mode of the enclosure structure and the layered steel structure are extracted in the overall building scheme 11 through the extraction sub-module, the preliminary framework of the interior system interface and the mechanical and electrical system arrangement are determined, so as to generate building drawings, structure drawings, interior drawings and mechanical and electrical equipment drawings.

[0043] The bill of materials 12 includes building components, structural parts, interior parts and mechanical and electrical equipment, and automatically labels the module size, interface type and installation method of each part, and pushes it to the database 21 for budgeting and production planning.

[0044] After the bill of materials 12, building drawings, structure drawings, interior drawings and mechanical and electrical equipment drawings are generated, the building, structure, interior and mechanical and electrical drawings are cross-checked to ensure design logic consistency, three-dimensional modeling (such as BIM technology) can be used for collision checking to detect potential conflicts between mechanical and electrical pipelines and building structures, and to optimize the arrangement scheme.

[0045] Step S2: classify various building materials according to the bill of materials 12, and prepare prefabricated parts and purchase customized parts according to the required building materials, and generate a cost list according to the required prefabricated parts and purchased parts.

[0046] The supply module 2 has a database 21 for storing building materials of different module levels and recording the inventory quantity of prefabricated parts, and the prefabricated parts and customized parts corresponding to the database 21 are screened through the bill of materials 12, the prefabricated parts recorded in the database 21 are prefabricated parts, and the customized parts not recorded in the database 21 are customized parts, and the inventory quantity of prefabricated parts in the database 21 and the required quantity of prefabricated parts are calculated, when the inventory quantity of prefabricated parts is not enough, the production order of prefabricated parts and customized parts is generated, and the manufacturing plan and logistics plan are provided.

[0047] In the supply preparation phase, to ensure timely procurement and rational allocation of components, strict audit and classification processing is required. The core process of this phase is to classify the cost list audited by the cost department through program classification, and to classify and count the prefabricated and customized components in combination with the component judgment database 21, and then output the prefabricated and customized procurement component table. The specific process is as follows: The preliminary component list audited by the cost department is used as the basis for input data in the subsequent processing flow. The audit phase ensures the accuracy of the component budget, specifications, quantity, etc. and lays the foundation for subsequent supply preparation. This step classifies the components preliminarily and determines the nature and subsequent demand of each component.

[0048] Using the component judgment database 21, the system further classifies components based on their nature, production method, and procurement requirements. The component judgment database contains the judgment rules for prefabricated and customized components, which can automatically identify and classify different types of components: prefabricated components: standardized, factory-produced components, usually provided by suppliers and produced in batches according to specifications.

[0049] Customized components: components customized according to project-specific requirements, which need to be procured through special design and manufacturing.

[0050] After component classification, the system will separately count prefabricated and customized components to obtain the quantity, specifications, production cycle, etc. of each component, which provides a basis for subsequent procurement planning and allocation, and also provides a clear bill of materials 12 for suppliers.

[0051] For customized components, the system will automatically start the procurement calculation program, which calculates the specific procurement requirements of each component based on the customization requirements of the components, including but not limited to quantity, cost, delivery period, and contract requirements with suppliers. Through this program, the procurement process of customized components can be accurately controlled to ensure that project progress is not affected.

[0052] The classified and calculated material information is finally output as a prefabricated component procurement form and a customized component procurement form. Each form lists the required procurement components, quantity, specifications, supplier information, and related requirements in detail. This form serves as the basis for procurement and supplier coordination work for the procurement department.

[0053] In the design production adjustment phase, to ensure efficient production and procurement of materials, the audited prefabricated component procurement form needs to be processed. This process relies on the factory internal production order judgment and supply database, outsourcing order judgment database 21, through the production order program and outsourcing order program, to finally form the production plan and procurement plan. The specific process is as follows: The material prefabricated part procurement form that has been audited and approved by the cost department is taken as input data into the subsequent production adjustment link. The form contains audited information such as prefabricated part quantity, specification, delivery period, and budget cost, providing accurate basis for the formulation of production plan and procurement plan. The factory uses the internal production order judgment database to make a preliminary screening 23a according to the information of the material procurement form. The database contains the existing production capacity, resource allocation, and production cycle and process requirements of various materials in the factory. The system will determine which materials can be produced internally and which need to be outsourced.

[0054] For prefabricated parts that can be produced internally, the system will automatically generate a production order request and enter the production plan formulation process.

[0055] For prefabricated parts that cannot be produced internally or parts that need to be outsourced due to production resource constraints, the system will turn to the outsourcing order judgment database. This database records information such as commonly used external suppliers, outsourcing capacity, delivery period, and price of the factory. Through database judgment, the system will determine which prefabricated parts need to be outsourced and generate an outsourcing order request.

[0056] Production plan and procurement plan are coordinated through the system to ensure the optimal allocation of internal and external production resources. The system will adjust the priority and schedule of production and procurement according to dynamic factors such as production requirements, delivery cycle, inventory situation, etc. of various parts to maximize production efficiency and supply chain management.

[0057] Step S3: On-site assembly of prefabricated parts and procurement parts according to the overall building scheme 11 in S1, component supply and logistics are arranged according to the plan, and on-site assembly is carried out using prefabricated parts, customized parts, and the overall building scheme 11 to realize the closed loop of construction engineering.

[0058] During the construction process, the overall building scheme 11 is iteratively adjusted according to actual needs or site problems, and is updated to the server simultaneously. For example, if the size of the door and window module changes from 1200mm to 1800mm due to changes in demand during construction, the corresponding 1800mm module information and BOM information are found, and the system is reissued with execution instructions to realize rapid information flow between design instructions, production, procurement, transportation, and construction, ensuring implementation efficiency and quality control.

[0059] The foregoing description of the disclosed embodiments enables one skilled in the art to make or use the application. Numerous modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without the use of the more specific language that will be desirous in the rest of the description. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0060] Although the terms design module 1, overall building project 11, bill of materials 12, supply module 2, database 21, sub-module 22, sub-module 23, construction module 3, etc. are used more frequently in this document, the possibility of using other terms is not excluded. The use of these terms is only intended to facilitate the description and explanation of the essence of the present application; their interpretation as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A prefabricated low-rise building system based on modular design, comprising a design module (1), a supply module (2) and a construction module (3), characterized in that: The design module (1) uses a 600mm basic module to set the building main body, building materials, and building nodes, and the building main body, building materials, and building nodes all form a multiple relationship with the 600mm basic module; the design module (1) generates an overall building plan (11) and a bill of materials (12) based on the 600mm basic module, the supply module (2) generates a production order based on the bill of materials (12) and provides a logistics plan, and the construction module (3) performs on-site assembly according to the overall building plan (11).

2. The modular design-based prefabricated low-rise building system according to claim 1, characterized in that: Based on the 600mm basic module, the module formula M_b = 600×2^n (n∈N) is formulated, where M_b is the module level of the building material, 5≥n≥0, and n is a natural number.

3. The modular design-based prefabricated low-rise building system according to claim 1, characterized in that: The required dimensions of the main building are determined by combining building materials of different modular levels.

4. The modular design-based prefabricated low-rise building system according to claim 2, characterized in that: The design module (1) assembles building materials of different modular levels to form an overall building plan (11), and calculates the total cumulative error according to the formula ΣΔb ≤ T_m / 3, where Δb is the cumulative error of building materials of a single modular level, ΣΔb is the cumulative error of building materials of multiple different modular levels, and T_m is the maximum error allowed for the entire building.

5. The modular design-based prefabricated low-rise building system according to claim 1, characterized in that: The design module (1) generates an overall building plan (11) based on the 600mm basic module, and simultaneously generates corresponding building drawings, structural drawings, interior drawings and electromechanical equipment drawings based on the 600mm basic module.

6. The modular design-based prefabricated low-rise building system according to claim 5, characterized in that: The design module (1) comprises an extraction submodule for extracting building structural nodes, and connection modes between the enclosure structure and the layered steel structure.

7. The modular design-based prefabricated low-rise building system according to claim 1, characterized in that: The supply module (2) comprises a database (21) for classifying building materials at each modular level.

8. The modular design-based prefabricated low-rise building system according to claim 7, characterized in that: The supply module (2) comprises an itemized submodule (22) for sorting the building materials by item and a summarizing submodule (23) for summarizing the costs.

9. The modular design-based prefabricated low-rise building system according to claim 8, characterized in that: The sub-item submodule (22) divides building materials into prefabricated parts and customized parts, and the production order includes preparing prefabricated parts and purchasing customized parts.

10. A method for constructing a modular low-rise building system, based on the modular low-rise building system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: Receive the order and design the plan. Based on the submitted building order, design the overall building plan (11) and the corresponding bill of materials (12) under the 600mm basic module; Step S2: Classify various building materials according to the bill of materials (12), prepare prefabricated parts and purchase customized parts according to the required building materials, and generate a cost list based on the required prefabricated parts and purchased parts; Step S3: Assemble the prefabricated and purchased parts on site according to the overall building plan (11) in S1.

Images