A prefabricated beam production supply and demand management system based on BIM

Abstract

The present application relates to the technical field of precast beam production management, and particularly relates to a precast beam production supply and demand management system based on BIM, which comprises: a project management module for managing project basic information; a beam factory management module for managing beam factory information, including production line pedestal quantity and storage area occupation condition; a BIM model management module for uploading, storing and displaying the BIM model of the precast beam; a precast beam information module for automatically extracting and displaying the attribute information of the precast beam from the BIM model; a demand ordering module for generating a beam demand list; an arrangement production module for generating a precast beam production plan; a progress management module for displaying the planned progress of the precast beam arranged for production and lagging early warning; and a production quality traceability module for displaying the production process inspection record and quality inspection data file of the precast beam; the present application solves the supply and demand imbalance problem caused by traditional manual experience production arrangement through the precise matching mechanism of construction demand driving production.

Description

Technical Field

[0001] This invention relates to the field of precast beam production management technology, and in particular to a BIM-based precast beam production supply and demand management system. Background Technology

[0002] In recent years, my country's transportation infrastructure construction has continued to advance, with the scale of highways, high-speed railways, urban expressways, and large bridge projects constantly expanding. Precast beams, due to their advantages such as high degree of industrialization, controllable quality, short on-site construction period, and environmental friendliness, have become the mainstream form of bridge superstructure. However, with the expansion of project scale, the acceleration of construction pace, and the improvement of quality control requirements, the coordination contradiction between traditional precast beam production management methods and on-site construction needs has become increasingly prominent.

[0003] Currently, under the traditional management model, precast beam production relies primarily on manual experience to formulate production plans, and information transmission depends on reports, telephone calls, and offline communication. This information asymmetry and lack of synchronization between the production and demand sides easily leads to imbalances in production and construction supply and demand. Secondly, data on progress, quality, inventory, and transportation during the production process are scattered across various work teams and departments, making it difficult to establish a unified, real-time, and traceable management framework. Problems such as untimely plan adjustments, unreasonable resource utilization, and opaque process control are common. Furthermore, precast beam production involves collaboration among multiple stakeholders, including the owner, project team, beam manufacturer, supervisor, logistics, and equipment manufacturers. Lack of data sharing, incomplete process loops, and slow change response further exacerbate the supply-demand mismatch.

[0004] Therefore, traditional methods are insufficient to achieve on-demand production organization, reasonable inventory management, and precise logistics distribution, and are no longer suitable for the industrialization, intelligentization, and refined management requirements of prefabricated buildings. Summary of the Invention

[0005] To address the problems of mismatch between precast beam production and on-site construction needs, inefficient planning and control, poor information collaboration, and insufficient BIM application under the existing traditional management model, this invention provides a BIM-based precast beam production supply and demand management system. The system aims to achieve production driven by construction needs, use BIM models to carry all-element information, and improve supply and demand matching efficiency and full-process control capabilities through digital means.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of this invention proposes a BIM-based precast beam production supply and demand management system, characterized in that it includes:

[0008] The project management module is used to manage basic project information;

[0009] The beam factory management module is used to manage beam factory information, including the number of production line supports and the occupancy of the storage area;

[0010] The BIM model management module is used to upload, store, and display the BIM model of precast beams;

[0011] The precast beam information module is used to automatically extract and display the attribute information of the precast beams from the BIM model;

[0012] The demand order module is used to directly select the precast beams to be ordered in the BIM model and generate a beam demand list.

[0013] The production scheduling module is used by the beam factory to generate a precast beam production plan based on the received beam demand list, the number of production line pedestals, and the occupancy of the storage area.

[0014] The progress management module is used to display the planned progress of precast beams that have been scheduled for production and to provide early warnings of delays.

[0015] The production quality traceability module is used to display the production process inspection records and quality inspection data of the precast beam after selecting it in the BIM model.

[0016] A further improvement is that the system also includes:

[0017] The transportation and erection management module is used to generate transportation orders based on the completion status of precast beam production and the needs of the construction site, and automatically close the corresponding beam demand list after the precast beams are erected.

[0018] A further improvement is that the beam demand list generated by the demand ordering module includes the span number, beam number, beam erection sequence, beam usage time, and demand priority of the selected precast beam; the demand ordering module supports selecting multiple precast beams in the BIM model for batch ordering, and uniformly setting the beam erection sequence and beam usage time; the beam demand list has a unique number and supports modification, withdrawal, and resubmission operations.

[0019] A further improvement is that the method by which the production module generates the precast beam production plan includes at least one of the following:

[0020] Manual scheduling: Manually specifying the production station and production time;

[0021] Automatic production scheduling: Based on the priority of the beam usage, the beam usage time, and the beam erection sequence in the beam usage demand list, and combined with the current production line pedestals and storage area occupancy, the production plan is automatically generated. High priority demands are given priority, and then the beams are sorted according to the beam usage time. At the same time, the availability of pedestals and storage capacity are checked, pedestals are automatically allocated, and the start and end times of each process are calculated.

[0022] Merged production scheduling: Multiple beam demand lists are merged to generate a batch production plan.

[0023] A further improvement is that the progress management module includes:

[0024] The Gantt chart display unit is used to display the production schedule of each precast beam in the form of a Gantt chart, showing the production start time, production end time and the estimated beam erection time.

[0025] BIM color mapping unit is used to identify the stage status of each precast beam in the BIM model with different colors. The stage status includes: not arranged, planned, in production, beam produced, erected, and delayed warning.

[0026] Lag Warning Unit: Used to automatically compare planned progress with actual progress. When the actual progress lags behind the planned progress and exceeds a set threshold, a lag warning is triggered, and the corresponding precast beam is marked with the lag warning color in the BIM model. At the same time, relevant responsible persons are reminded through messages and mobile push.

[0027] A further improvement is that, in the production quality traceability module, the production process inspection records include template installation records, steel bar processing and installation records, concrete pouring records, and prestressed tendon tensioning records. Each record includes the process name, construction time, operator, inspector, and acceptance conclusion fields. The quality inspection documents include application approval forms, inspection record forms, and test reports.

[0028] Further improvements include that the BIM model management module supports uploading BIM models in Autodesk Revit format and automatically completes model parsing, format conversion, and lightweight storage. The lightweight storage includes geometric data compression, texture simplification, LOD layered loading, and instantiation and reuse of the same components. The BIM model management module supports online preview, rotation, sectioning, roaming, and positioning of the model to specific precast beam segments, and supports model difference comparison function. When a new version of the BIM model is uploaded, it automatically compares the old and new models and highlights the precast beam segments that have changed.

[0029] A further improvement is that the basic project information managed by the project management module includes: project name, bid section number, project cost, construction unit, construction unit, project address, project pictures, project members, and project overview. It also supports version management of project information. When the basic project information changes, it automatically records the change history and notifies the associated beam factory and supervision unit.

[0030] The beam factory management module manages the following beam factory information: beam factory name, beam factory address, project, production line information, and storage area information. The production line information includes the number of beam supports, type and specifications, and availability status. The storage area information includes the storage area capacity and turnover days.

[0031] A further improvement is that the transport erection management module includes:

[0032] The transport order generation unit is used to generate a transport order based on the production completion status of the precast beams and the needs of the construction site. The transport order includes a list of transported beam segments, loading time, estimated arrival time, transport vehicle information, and driver information.

[0033] The barcode tracking unit is used to scan QR codes or RFID tags when precast beams are loaded, leave the factory and arrive at the site to record the transportation trajectory and track the location of the transport vehicle in real time through GPS positioning.

[0034] The erection confirmation unit is used to update the status of the precast beam to "erected" after the on-site construction personnel have completed the erection, and automatically close the corresponding beam demand list. At the same time, it generates an erection record including the erection time, erection location, and operator.

[0035] The second aspect of this invention proposes a BIM-based precast beam production supply and demand management method, applied to the BIM-based precast beam production supply and demand management system described in any one of the first aspects, comprising the following steps:

[0036] Create a project and enter its basic information;

[0037] Enter information about the beam factory, including the number of production line supports and the occupancy of the storage area;

[0038] Upload the precast beam BIM model, and automatically complete model parsing, lightweight storage, and binding with the project code;

[0039] Automatically extract and display the attribute information of precast beams from the BIM model;

[0040] In the BIM model, directly select the precast beam that needs to be ordered to generate a beam demand list and send it to the beam factory.

[0041] Based on the beam demand list, combined with the number of production line pedestals and the occupancy of the storage area, a precast beam production plan is generated through manual scheduling, automatic scheduling, or combined scheduling.

[0042] The production schedule is displayed in the form of a Gantt chart, and the stage status of each precast beam is marked with different colors in the BIM model, including not scheduled, planned, in production, beam delivered, erected, and delayed warning. When the actual progress is delayed by more than a threshold, an warning is triggered.

[0043] Select the precast beam in the BIM model to display its production process inspection records and quality inspection documents;

[0044] A transport order is generated based on the production completion status and on-site requirements. The transport trajectory is tracked by scanning a code, and the corresponding beam demand list is automatically closed after the erection is completed.

[0045] The beneficial effects of this invention are as follows:

[0046] This invention constructs a BIM-based precast beam production supply and demand management system, which solves the supply and demand imbalance problem caused by traditional manual experience-based production scheduling through a precise matching mechanism driven by construction needs.

[0047] This invention enables precast beams to be produced based on demand, achieving precise matching of supply and demand. Project teams can directly place orders within the BIM model, and production scheduling is automatically arranged based on beam factory resource constraints, effectively avoiding beam shortages at project sites or beam stockpiles at beam factories. This invention deeply integrates the BIM model with precast beam production data, providing visualization, traceability, and controllability. BIM color mapping of the entire lifecycle status makes progress readily apparent. This invention can automatically schedule production on the system according to actual needs, optimizing platforms, schedules, and resources, thereby improving beam factory production efficiency. The entire process of precast beam production—from planning, production, quality, delivery, to erection—is coordinated, ensuring data consistency among owners, project teams, beam factories, and supervisors, forming a complete supply-demand closed loop. Attached Figure Description

[0048] Figure 1 This is a functional module structure diagram of a BIM-based precast beam production supply and demand management system according to the present invention.

[0049] Figure 2 This is a flowchart of a BIM-based precast beam production supply and demand management method according to the present invention. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] Please refer to the attached document. Figure 1 Appendix Figure 2 This invention proposes a BIM-based precast beam production supply and demand management system, which includes the following functional modules: project management module, beam factory management module, BIM model management module, precast beam information module, demand ordering module, production scheduling module, progress management module, production quality traceability module, and transportation and erection management module.

[0053] The system adopts a B / S architecture, including a server-side component, a database, a web-based management interface, and a mobile application. Management roles include: owner, project administrator, beam factory administrator, planning personnel, production teams, quality inspectors, supervisors, and on-site construction personnel.

[0054] The following is a detailed explanation of the various functional modules of a BIM-based precast beam production supply and demand management system in an embodiment of the present invention:

[0055] In this embodiment, the project management module is used to manage basic project information, specifically for adding, modifying, deleting, and displaying project-related information fields.

[0056] Specifically, the project-related information fields include: project name, bid section number, project cost, construction unit, contractor, project address, project images, project members, and project overview. Once the project is created, it will serve as the primary source of all subsequent business data.

[0057] Understandably, the project management module is responsible for maintaining basic information at the project level, providing project-level data isolation and attribution identification for all subsequent precast beam production and supply and demand management. Through unified project information management, it ensures that data is not mixed up when multiple projects are running concurrently. For example, when the same beam factory supplies precast beams to multiple projects simultaneously, the system can automatically distinguish the beam demand lists, production plans, and inventory data of different projects based on project identifiers, avoiding data crosstalk between projects.

[0058] In a preferred embodiment of this invention, the project information supports version management. When the basic project information changes, such as when the construction period is adjusted or the construction unit is changed, the system automatically records the change history and notifies the associated beam factory and supervision unit.

[0059] In this embodiment, the beam factory management module is used to manage beam factory information, which includes at least the number of production line pedestals and the occupancy status of the storage area.

[0060] Specifically, the beam factory management module is responsible for maintaining the beam factory's production resource information. The number of production line rigs determines the beam factory's maximum parallel production capacity, while the occupancy status of the storage area reflects the current inventory status. These two data points are key constraints for the subsequent production scheduling module to make production scheduling decisions. The system records and updates the occupancy status of rigs and the inbound and outbound status of the storage area in real time through the beam factory management module, ensuring that the resource data used for production scheduling is up-to-date and accurate.

[0061] Understandably, the beam factory management module serves as a resource hub connecting the demand and production ends. Without accurate data on precast supports and storage capacity, automated production scheduling loses its foundation and may generate unenforceable plans. For example, a beam factory might have 10 precast supports. The system needs to record in real time whether each support is idle, in use, or under maintenance. Simultaneously, the system must track the current number of beams stored in the storage area and the number that can be received. This data directly impacts the scheduling decisions for new production plans. If the storage area is full, the system should postpone scheduling new production tasks to avoid insufficient storage space after production is completed.

[0062] In a preferred embodiment, the beam factory information further includes: factory name, address, project details, production line pedestal type and specifications, pedestal availability, and warehouse turnover days. The pedestal type and specifications are used to match precast beams of different lengths and types; for example, a 30-meter pedestal cannot be used to produce a 40-meter beam. The pedestal availability includes three states: idle, in use, and under maintenance. The warehouse turnover days is the average time each beam spends in the warehouse, used to predict the release schedule of warehouse capacity. Furthermore, the beam factory management module includes a resource calendar function to record the beam factory's production schedule, holiday arrangements, and equipment maintenance plans. These time constraints are incorporated into the calculations during automatic production scheduling to avoid scheduling production tasks on non-working days.

[0063] In this embodiment, the BIM model management module is used to upload, store, and display the BIM model of the precast beam.

[0064] Specifically, the BIM model management module supports uploading BIM models in Autodesk Revit format and automatically completes model parsing, format conversion, and lightweight storage. It also supports online previewing, rotation, sectioning, roaming, and positioning of the model to specific precast beam segments. The BIM model is bound to the project code, serving as a visualization carrier for the entire process.

[0065] Understandably, the BIM model management module not only handles the storage and display of BIM models, but more importantly, it enables large bridge BIM models to load and interact smoothly on the web through lightweight processing. Large bridge BIM models typically contain hundreds of beams, with file sizes exceeding 500MB. Lightweight processing includes techniques such as geometric data compression, texture simplification, LOD layered loading, and instantiating and reusing identical components. Each precast beam in the model has a unique engineering code, which is linked to subsequent beam requirement lists, production orders, quality inspection records, and transport documents, achieving full lifecycle data association.

[0066] In a preferred embodiment of this invention, the BIM model management module also supports a model difference comparison function. When the project design changes, the user can upload a new version of the BIM model, and the system will automatically compare the old and new models, highlighting any newly added, deleted, or attribute-changed precast beam segments, and prompting whether the relevant beam requirement list needs to be updated synchronously.

[0067] In this embodiment, the precast beam information module is used to automatically extract and display the attribute information of the precast beam from the BIM model.

[0068] Specifically, the information fields related to the precast beams include: the name, type, beam length, volume, span number, beam number, project code, and sub-item code of the precast beam; by displaying all beam information in a list format, it supports filtering by type, beam length, and progress status. Each precast beam is uniquely identified by its project code, which is used throughout the entire process of production, quality, transportation, and erection.

[0069] Understandably, in the traditional approach, project personnel need to manually enter dozens of attribute fields for each beam, which is not only inefficient but also prone to errors, such as incorrect beam length entry or duplicate numbering. This invention, however, utilizes BIM model automatic parsing technology to extract the structural information of all precast beams immediately after the model is uploaded. This allows the same BIM model to be used for both design visualization and as a data source for production management. Table 1 below shows an example of the fields automatically extracted from the precast beam information module.

[0070] Precast beam name String BIM component name 30m precast box girder General Identifier Precast beam type String BIM component types Box girder or T-beam Production line matching Liang Chang floating-point numbers BIM geometric parameters 30.5 meters Base specifications match volume floating-point numbers BIM geometric calculations 32.8 cubic meters Material usage estimation Cross-number String BIM attribute fields K3+122 cross Erection location positioning Beam Number String BIM attribute fields L-05-003 Unique Identifier for a Single Beam Project Code String Automatically generated by the system PRJ-001-L-05-003 Unique identifier across projects Sub-item coding String BIM attribute fields B-02 Bill of Quantities Association

[0071] Table 1

[0072] In this embodiment, the demand ordering module is used to allow the project department to directly select the precast beams that need to be ordered in the BIM model and generate a beam demand list.

[0073] Specifically, after the project team directly selects the precast beams to be ordered in the BIM model, the system automatically generates a beam demand list including the span number, beam number, beam erection sequence, beam usage time, and demand priority, and sends it to the beam factory. The beam demand list has a unique number and supports modification, withdrawal, and resubmission operations.

[0074] Understandably, in the traditional model, project teams typically inform beam manufacturers of the required number of beams via phone or email, but lack clear communication regarding specific beam identification, erection sequence, and precise usage time. In this invention, project personnel directly select the beams to be ordered in the BIM model. The system automatically associates all attributes of that beam and allows the project team to add the following key fields: erection sequence, used to guide the beam manufacturer's production scheduling and prevent beams produced earlier from being placed on lower levels and unable to be erected in order; usage time, i.e., the planned on-site erection time, from which the system calculates the latest production completion time; and demand priority, including levels such as urgent, normal, and bufferable, used for production scheduling decisions when resources are insufficient. This invention, through this point-and-click ordering interaction, improves the accuracy of information exchange between the demand and production sides to the single beam level, fundamentally solving the problems of vague demand information and delayed transmission in the traditional model.

[0075] In a preferred embodiment, the demand ordering module also supports selecting multiple precast beams in the BIM model for batch ordering, and uniformly setting the beam erection sequence and beam usage time.

[0076] In this embodiment, the production arrangement module is used to enable the beam factory to generate a precast beam production plan based on the received beam demand list and the number of production line pedestals and warehouse occupancy in the beam factory management module.

[0077] Specifically, the methods for generating precast beam production plans include at least one of the following: manual scheduling, automatic scheduling, and combined scheduling.

[0078] Manual scheduling, which involves manually assigning production stations and production times, is suitable for special beam types or urgent order insertion scenarios. For example, if a beam uses a special process and must be produced on a specific station, the planner can manually assign the beam to the designated station and lock the time slot for that station.

[0079] Automated production scheduling means that the system automatically generates a production plan based on the priority of beam requirements, beam usage time, and beam erection sequence in the beam requirement list, combined with the current number of production line supports and warehouse space occupancy. The system prioritizes high-priority requirements, then sorts them by beam usage time, while simultaneously verifying support availability and warehouse capacity, automatically allocating supports, and calculating the start and end times of each process.

[0080] Merged production scheduling means that the system combines multiple beam demand lists and generates a batch production plan. It is applicable to multiple demands of the same type and in the same time period. Merged production improves the utilization rate of the production platform and the turnover efficiency of the mold.

[0081] Understandably, the production scheduling module enables bidirectional matching of demand constraints and resource constraints. Traditional production scheduling either only considers the beam factory's own capacity, such as the number of beam supports, ignoring the time window for beam usage on-site; or it only schedules production according to the order of demand, without considering the actual available resources of the beam factory. In this invention, the system simultaneously reads the beam usage demand list, including the beam usage time, priority, and the beam support status and storage capacity from the beam factory management module. Automatic production scheduling uses a built-in scheduling algorithm to automatically calculate the optimal production plan that satisfies all constraints.

[0082] The scheduling algorithm specifically includes the following steps: First, sort the unscheduled demand list by priority from high to low, beam usage time from early to late, and beam erection order. Second, iterate through each sorted demand: first, check available piers, filtering out piers with matching specifications and currently available; then check storage capacity; if the storage area is full when production is completed, postpone the production start time or prompt for additional outbound shipments; next, allocate piers and calculate the production cycle, including formwork installation, reinforcement, pouring, curing, tensioning, beam erection, and other processes; finally, update the pier occupancy timeline. Third, if all demands cannot be scheduled while meeting the beam usage time, the system marks conflicting demands and prompts for manual intervention.

[0083] In addition, if resources are insufficient, such as when the support piers are at full capacity, the system will issue an early warning and suggest that the beam manufacturer add support piers or adjust the priority of demand.

[0084] In a preferred embodiment, the production scheduling module also supports dynamic rescheduling. When unexpected events such as emergency order insertion, workbench failure, or material delays occur, the system can re-execute the scheduling algorithm for tasks that have not yet started, while retaining the production tasks that have already started, and output a comparison of the old and new plans for planners to confirm.

[0085] In this embodiment, the progress management module is used to display the planned progress of precast beams that have been scheduled for production and to provide early warnings of delays.

[0086] Specifically, the progress management module includes a Gantt chart display unit, a BIM color mapping unit, and a delay warning unit.

[0087] The Gantt chart display unit is used to show the production schedule of each precast beam in Gantt chart format, displaying the production start time, production end time, and estimated beam erection time. The Gantt chart can be expanded by process, showing the planned time and actual completion time of each process, including formwork installation, rebar tying, concrete pouring, and tensioning and grouting.

[0088] The BIM color mapping unit is used to identify the stage status of each precast beam in the BIM model using different colors. The stage status includes: not scheduled, planned, in production, beam produced, erected, and delayed warning. Specifically, gray represents not scheduled production (not yet scheduled); orange represents planned production (scheduled but not yet started); purple represents in production (under construction on the pedestal); blue represents beam produced (completed and removed from the production line); green represents erected (transported to the site and erected); and flashing red represents a delayed warning (actual progress is behind schedule by more than a set threshold).

[0089] The delay warning unit is used to automatically compare the planned progress with the actual progress. When the actual progress lags behind the planned progress and exceeds a set threshold, such as lags behind by more than 24 hours, a delay warning is triggered, and the corresponding precast beam is marked in the BIM model with the delay warning color. At the same time, relevant responsible persons are reminded through system messages and mobile terminal push.

[0090] Understandably, the progress management module upgrades traditional progress tracking methods to a visual, real-time management tool. Gantt charts are suitable for viewing the overall timeline, helping planners quickly identify bottlenecks in tasks; while BIM color mapping provides an intuitive spatial perspective. Project managers only need to open the BIM model to see the entire beam yard's production status and the current stage of each beam at a glance, without needing to flip through multiple tables. In particular, the delay warning function, through color changes and proactive push notifications, helps managers detect progress deviations immediately and take measures to avoid large delays caused by the accumulation of small delays.

[0091] In this embodiment, the production quality traceability module is used to display the production process inspection records and quality inspection data files of the precast beam after it is selected in the BIM model.

[0092] Specifically, the production process inspection records include at least: formwork installation records, rebar processing and installation records, concrete pouring records, and prestressed tendon tensioning records. Each record includes fields such as process name, construction time, operators, inspectors, and acceptance conclusion. The quality inspection documents include at least: application approval form, inspection record sheet, and test report. Users can view the aforementioned production process inspection records and quality inspection documents corresponding to any precast beam by selecting it in the BIM model, and downloading them is supported.

[0093] Understandably, the production quality traceability module enables one-click traceability from the model to the quality archive. In the traditional model, querying the quality record of a specific beam requires sifting through numerous paper documents or searching different systems, which is inefficient and prone to omissions. In this invention, however, all process inspection records and quality control documents are bound to the beam engineering code in the BIM model. Users only need to click on the target beam in the BIM model to obtain its complete quality archive, greatly facilitating supervision, acceptance by the supervisor, inspection by the owner, and subsequent operation and maintenance.

[0094] In this embodiment, the transportation and erection management module is used to generate a transportation order based on the production completion status of the precast beams and the needs of the construction site, and automatically close the corresponding beam demand list after the precast beams are erected, thus forming a closed loop of supply and demand for demand, production, transportation, and erection.

[0095] Specifically, the transportation and installation management module includes a transport order generation unit, a barcode tracking unit, and an installation confirmation unit.

[0096] The transport order generation unit is used to generate transport orders based on the production completion status of precast beams and the needs of the construction site. The transport order includes a list of transported beam segments, loading time, estimated arrival time, transport vehicle information, and driver information.

[0097] The scanning and tracking unit is used to scan QR codes or RFID tags when the precast beams are loaded, leave the factory, and arrive at the site, respectively, to record the transportation trajectory and track the location of the transport vehicles in real time through GPS positioning.

[0098] The erection confirmation unit is used to update the status of the precast beam in the system to "erected" after the on-site construction personnel have completed the erection, and automatically close the corresponding beam demand list. At the same time, it generates an erection record including the erection time, erection location, and operator.

[0099] Understandably, the transportation and erection management module is the final link in the entire supply and demand chain. In the traditional model, after beam production is completed at the beam factory, transportation and erection information are often disconnected from the production system, making it impossible to accurately determine whether a particular beam has been used on-site, thus affecting subsequent production decisions, such as whether re-production is needed. This invention ensures a transparent and controllable transportation process through barcode tracking and status updates. Simultaneously, through an automatic closed-loop mechanism, it establishes a complete data chain encompassing beam demand lists, production orders, transportation orders, and erection status. Once a beam is erected, the system updates its status and releases the corresponding demand plan, providing accurate data for subsequent statistical analysis, such as demand fulfillment rate and production on-time rate.

[0100] This invention also proposes a BIM-based method for managing the supply and demand of precast beam production, comprising the following steps:

[0101] Step S1: Create a project and enter the basic project information.

[0102] Specifically, the project administrator logs into the system, enters the project management module, creates a project, and enters basic project information, including project name, bid number, project cost, construction unit, contractor, project address, project photos, project members, and project overview. Once the project is created, it becomes the owner of all subsequent business data.

[0103] Step S2: Enter the beam factory information, including the number of production line pedestals and the occupancy of the storage area.

[0104] Specifically, the beam factory administrator logs into the system, enters the beam factory management module, and inputs beam factory information, which includes at least the number of production line supports and the occupancy of the storage area. The system saves the beam factory's basic resource data, providing a basis for subsequent production scheduling, production, and warehousing.

[0105] Understandably, the number of production line supports and the occupancy of storage areas are the two most critical constraints for production scheduling decisions, and their accuracy directly affects the feasibility of the production plan. In a preferred embodiment of this case, further detailed information such as the beam factory name, beam factory address, project, support type and specifications, support availability, and storage area turnover days can be entered.

[0106] Step S3: Upload the precast beam BIM model, automatically complete model parsing, lightweight storage, and bind it to the project code.

[0107] Specifically, the project administrator accesses the BIM model management module and uploads the precast beam BIM model in Autodesk Revit format. The system automatically completes model parsing, format conversion, lightweight storage, and binds the model to the project code.

[0108] Step S4: Automatically extract and display the attribute information of the precast beams from the BIM model.

[0109] Specifically, after the BIM model is uploaded, the precast beam information module automatically extracts the attribute information of the precast beam from the BIM model, including the name, type, beam length, volume, span number, beam number, project code and sub-item code of the precast beam, and displays it in a list format.

[0110] Understandably, step S4 enables the automatic conversion from the BIM model to business data. After extraction, users can check in the list whether the number of beam segments matches the design drawings. If there are any missing or incorrect segments, they can manually correct them or re-upload the model.

[0111] Step S5: Directly select the precast beams that need to be ordered in the BIM model, generate a beam demand list and send it to the beam factory.

[0112] Specifically, project planning personnel enter the demand ordering module and directly select the precast beams to be ordered in the BIM model. The system automatically generates a beam demand list, which includes the span number, beam number, beam erection sequence, beam usage time, and demand priority of the selected precast beams, and sends it to the beam factory.

[0113] Understandably, step S5 facilitates the initial connection between the demand and production sides. Unlike traditional telephone reporting of requirements, this step requires project personnel to clearly specify which beams are needed in the BIM model, along with the beam erection sequence and usage time. This information directly enters the production scheduling module, avoiding information distortion in intermediate stages.

[0114] Step S6: Based on the beam demand list, combined with the number of production line pedestals and the occupancy of the storage area, generate a precast beam production plan.

[0115] Specifically, the beam factory's planning personnel enter the production arrangement module to view the received beam demand list. Based on the current number of production line pedestals and warehouse occupancy at the beam factory, and combined with the demand priority, beam usage time, and beam erection sequence in the beam demand list, they generate a precast beam production plan through manual scheduling, automatic scheduling, or combined scheduling, and then distribute the production plan to the production teams.

[0116] Step S7: Display the production schedule in the form of a Gantt chart and mark the stage status of each precast beam in the BIM model with different colors.

[0117] Specifically, the system manages the production progress of precast beams through a progress management module: the production schedule of each precast beam is displayed in Gantt chart format, and the stage status of each precast beam is marked with different colors in the BIM model, including not scheduled, planned, in production, beam delivered, erected, and delayed warning. The system automatically compares the planned progress with the actual progress, and triggers a delayed warning and sends a notification when the actual progress lags behind by more than a set threshold.

[0118] Understandably, step S7 provides project managers with multi-perspective progress monitoring tools. Gantt charts are suitable for macro-level analysis, while BIM color mapping is suitable for quickly locating problematic beam segments. The delayed early warning mechanism transforms passive management into proactive management, facilitating timely correction.

[0119] Step S8: Select the precast beam in the BIM model to display its production process inspection records and quality inspection documents.

[0120] Specifically, users access the production quality traceability module, select any precast beam in the BIM model, and the system displays the production process inspection records and quality inspection documents for that precast beam. The production process inspection records include formwork installation records, steel bar processing and installation records, concrete pouring records, and prestressed tendon tensioning records. The quality inspection documents include application approval forms, inspection record sheets, and test reports.

[0121] Understandably, step S8 achieves a deep integration of quality records and the BIM model. Traditional quality management systems are typically independent of BIM; users need to remember the beam segment numbers first and then search for them in the quality system. This invention, however, embeds the quality query entry directly into the BIM model, allowing users to view the information with a single click, significantly improving the efficiency of acceptance procedures for supervisors and owners.

[0122] Step S9: Generate a transport order based on the production completion status and on-site requirements, track the transport trajectory by scanning the code, and automatically close the corresponding beam demand list after the erection is completed.

[0123] Specifically, the system enters the transportation and erection management module, generating transport orders based on the precast beam production completion status and construction site requirements. Transportation personnel scan the codes sequentially at loading, departure from the factory, and arrival at the site, with GPS tracking tracing the transport route. After on-site construction personnel complete the erection, they update the precast beam status to "erected" in the system, and the system automatically closes the corresponding beam demand list, completing the supply-demand closed loop of demand, production, transportation, and erection.

[0124] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A BIM-based precast beam production supply and demand management system, characterized in that, include: The project management module is used to manage basic project information; The beam factory management module is used to manage beam factory information, including the number of production line supports and the occupancy of the storage area; The BIM model management module is used to upload, store, and display the BIM model of precast beams; The precast beam information module is used to automatically extract and display the attribute information of the precast beams from the BIM model; The demand order module is used to directly select the precast beams to be ordered in the BIM model and generate a beam demand list. The production scheduling module is used by the beam factory to generate a precast beam production plan based on the received beam demand list, the number of production line pedestals, and the occupancy of the storage area. The progress management module is used to display the planned progress of precast beams that have been scheduled for production and to provide early warnings of delays. The production quality traceability module is used to display the production process inspection records and quality inspection data of the precast beam after selecting it in the BIM model.

2. The BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, The system also includes: The transportation and erection management module is used to generate transportation orders based on the completion status of precast beam production and the needs of the construction site, and automatically close the corresponding beam demand list after the precast beams are erected.

3. The BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, The beam demand list generated by the demand ordering module includes the span number, beam number, beam erection sequence, beam usage time, and demand priority of the selected precast beams. The demand ordering module supports selecting multiple precast beams in the BIM model for batch ordering and uniformly setting the beam erection sequence and beam usage time. The beam demand list has a unique number and supports modification, withdrawal, and resubmission operations.

4. The BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, The method by which the production module generates a precast beam production plan includes at least one of the following: Manual scheduling: Manually specifying the production station and production time; Automatic production scheduling: Based on the priority of the beam usage, the beam usage time, and the beam erection sequence in the beam usage demand list, and combined with the current production line pedestals and storage area occupancy, the production plan is automatically generated. High priority demands are given priority, and then the beams are sorted according to the beam usage time. At the same time, the availability of pedestals and storage capacity are checked, pedestals are automatically allocated, and the start and end times of each process are calculated. Merged production scheduling: Multiple beam demand lists are merged to generate a batch production plan.

5. A BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, The progress management module includes: The Gantt chart display unit is used to display the production schedule of each precast beam in the form of a Gantt chart, showing the production start time, production end time and the estimated beam erection time. BIM color mapping unit is used to identify the stage status of each precast beam in the BIM model with different colors. The stage status includes: not arranged, planned, in production, beam produced, erected, and delayed warning. Lag Warning Unit: Used to automatically compare planned progress with actual progress. When the actual progress lags behind the planned progress and exceeds a set threshold, a lag warning is triggered, and the corresponding precast beam is marked with the lag warning color in the BIM model. At the same time, relevant responsible persons are reminded through messages and mobile push.

6. The BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, In the production quality traceability module, the production process inspection records include formwork installation records, steel bar processing and installation records, concrete pouring records, and prestressed tendon tensioning records. Each record includes the process name, construction time, operator, inspector, and acceptance conclusion fields. The quality inspection documents include application approval forms, inspection record forms, and test reports.

7. The BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, The BIM model management module supports uploading BIM models in Autodesk Revit format and automatically completes model parsing, format conversion, and lightweight storage. The lightweight storage includes geometric data compression, texture simplification, LOD layer loading, and instantiation and reuse of the same components. The BIM model management module supports online preview, rotation, sectioning, roaming, and positioning of the model to specific precast beam segments. It also supports model difference comparison function. When a new version of the BIM model is uploaded, it automatically compares the old and new models and highlights the precast beam segments that have changed.

8. A BIM-based precast beam production supply and demand management system according to claim 1, characterized in that, The basic project information managed by the project management module includes: project name, bid section number, project cost, construction unit, construction company, project address, project pictures, project members, and project overview. It also supports version management of project information. When the basic project information changes, it automatically records the change history and notifies the associated beam factory and supervision unit. The beam factory information also includes: beam factory name, beam factory address, project to which it belongs, as well as production line pedestal type and specifications, pedestal availability status, and warehouse turnover days.

9. A BIM-based precast beam production supply and demand management system according to claim 2, characterized in that, The transportation setup management module includes: The transport order generation unit is used to generate a transport order based on the production completion status of the precast beams and the needs of the construction site. The transport order includes a list of transported beam segments, loading time, estimated arrival time, transport vehicle information, and driver information. The barcode tracking unit is used to scan QR codes or RFID tags when precast beams are loaded, leave the factory and arrive at the site to record the transportation trajectory and track the location of the transport vehicle in real time through GPS positioning. The erection confirmation unit is used to update the status of the precast beam to "erected" after the on-site construction personnel have completed the erection, and automatically close the corresponding beam demand list. At the same time, it generates an erection record including the erection time, erection location, and operator.

10. A BIM-based method for supply and demand management of precast beam production, characterized in that, The BIM-based precast beam production supply and demand management system described in any one of claims 1-9 includes the following steps: Create a project and enter its basic information; Enter information about the beam factory, including the number of production line supports and the occupancy of the storage area; Upload the precast beam BIM model, and automatically complete model parsing, lightweight storage, and binding with the project code; Automatically extract and display the attribute information of precast beams from the BIM model; In the BIM model, directly select the precast beam that needs to be ordered to generate a beam demand list and send it to the beam factory. Based on the beam demand list, combined with the number of production line pedestals and the occupancy of the storage area, a precast beam production plan is generated through manual scheduling, automatic scheduling, or combined scheduling. The production schedule is displayed in the form of a Gantt chart, and the stage status of each precast beam is marked with different colors in the BIM model, including not scheduled, planned, in production, beam delivered, erected, and delayed warning. When the actual progress is delayed by more than a threshold, an warning is triggered. Select the precast beam in the BIM model to display its production process inspection records and quality inspection documents; A transport order is generated based on the production completion status and on-site requirements. The transport trajectory is tracked by scanning a code, and the corresponding beam demand list is automatically closed after the erection is completed.

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