Fabricated building construction information management system and method based on BIM

Abstract

The invention discloses a BIM-based fabricated building construction information management system and method, and relates to the technical field of information management, and the method comprises the steps: obtaining a prefabricated part demand plan through a BIM model; according to the prefabricated part demand plan and the obtained construction progress plan, the production and transportation time of the prefabricated part is calculated, and whether the production and transportation time of the prefabricated part accords with the prefabricated part demand plan is judged; and based on a judgment result, sending the production and transportation time of the prefabricated part which does not conform to the demand plan of the prefabricated part to the BIM model, obtaining the internal opinions of the related party, calculating the internal opinions and a predefined weight matrix to obtain equilibrium opinions, and feeding back the equilibrium opinions to the BIM model. According to the method, the production and transportation time is calculated for the working procedures with different characteristics by using the flow shop scheduling method, the individual opinions of the related parties are balanced through the recursive relationship according to the predefined weight matrix, and the cross-organization cooperation efficiency and the management efficiency and resource utilization rate of the fabricated building are improved.

Description

Technical Field

[0001] This invention relates to the technical field of information management, and in particular to a BIM-based prefabricated building construction information management system and method. Background Technology

[0002] With the acceleration of industrialization in the construction industry, prefabricated buildings have become an industry trend due to their energy-saving, environmentally friendly, and efficient construction characteristics. However, in actual project implementation, the coordinated management between the production and transportation of prefabricated components and the on-site construction progress still faces significant challenges: traditional management models rely on manual experience to estimate component production cycles, lacking scientific calculation models, leading to a serious disconnect between planning and execution; when schedule conflicts occur, there is a lack of effective collaborative decision-making mechanisms among the participating parties, usually resolving issues through time-consuming and labor-intensive meetings, and the decision-making results are often influenced by subjective factors, making it difficult to achieve optimal outcomes. While existing BIM technology can achieve three-dimensional visualization, its functions are weak in terms of schedule early warning, intelligent conflict resolution, and multi-party collaborative optimization, failing to form a closed-loop management system from problem identification to decision execution. Therefore, a new management system is urgently needed to achieve precise control and intelligent decision-making across the entire chain of prefabricated building construction.

[0003] Currently, Chinese patent application number CN202410591049.2 discloses a prefabricated building construction engineering information management system based on BIM technology. This system includes a construction information input unit for generating a project schedule, a building model construction unit, a construction information monitoring unit, and an information management platform for controlling the project schedule. The construction information input unit is used to input project initiation, project plan, construction plan, construction progress, and construction manager information. The building model construction unit includes a contour recognition module and an information supplementation module. The construction information monitoring unit includes a construction plan module, a site material module, a construction progress module, a construction quality module, and a completion delivery and maintenance module. This invention belongs to the field of information management system technology, specifically providing a prefabricated building construction engineering information management system to address the problems of poor continuity and intuitiveness in monitoring construction engineering information in existing technologies, facilitating the supervision of the construction process. However, related technologies cannot utilize flow workshop scheduling methods and different characteristic processes to calculate the production and transportation time of prefabricated components, lacking resource utilization efficiency; they also cannot utilize predefined weight matrices to balance the individual opinions of various stakeholders through recursive relationships, resulting in low management efficiency. Summary of the Invention

[0004] The technical problem solved by this invention is that related technologies cannot use flow workshop scheduling methods and process characteristics to calculate the production and transportation time of prefabricated components, resulting in a lack of resource utilization; and they cannot use predefined weight matrices to balance the individual opinions of various stakeholders through recursive relationships, resulting in low management efficiency.

[0005] To address the aforementioned technical problems, this invention provides the following technical solution: a BIM-based prefabricated building construction information management system, comprising a construction module, a calculation module, and a collaboration module: The building module is used to obtain prefabricated component demand plans based on the BIM model; The calculation module is used to calculate the production and transportation time of prefabricated components based on the prefabricated component demand plan and the obtained construction schedule plan, and to determine whether the prefabricated component production and transportation time meets the prefabricated component demand plan. The collaboration module is used to send the production and transportation time of prefabricated components that do not meet the prefabricated component demand plan to the BIM model based on the judgment result, obtain the internal opinions of relevant parties, calculate the balanced opinion based on the internal opinions and the predefined weight matrix, and feed the balanced opinion back to the construction module.

[0006] Preferably, the building module includes a BIM model building unit and a splitting unit; The BIM model building unit is used to acquire the target building's 3D model and construction progress data, and to build a BIM model based on the target building's 3D model and construction progress data. Construction progress data includes the planned start time, planned end time, actual start time, actual end time, and current percentage of completion for each construction task. The splitting unit is used to obtain the construction schedule plan, and to split the construction schedule plan into split work nodes by the work decomposition method. The split work nodes are then associated with the BIM model through BIM software to generate a prefabricated component demand plan, which includes quarterly, monthly and daily demand quantities.

[0007] Preferably, the calculation module includes a calculation unit and a judgment unit; The calculation unit is used to calculate the production and transportation process of prefabricated components using the assembly line scheduling method and the prefabricated component demand plan, and to obtain the production and transportation time of prefabricated components. The judgment unit is used to determine whether the production and transportation time of prefabricated components meets the prefabricated component demand plan. If the production and transportation time of prefabricated components meets the prefabricated component demand plan, then the production and transportation time of prefabricated components is marked with a confirmation identifier and sent to the collaboration module; If the production and transportation time of prefabricated components does not meet the prefabricated component demand plan, the production and transportation time of prefabricated components will be sent to the collaboration module.

[0008] Preferably, the calculation expression for the completion time of each process according to the assembly line scheduling method is as follows: ; ; Among them, J l,j On the l-th production line, the production sequence is j (j≤n). l Precast components, N l,k For the k-th process on production line l, P l,j,k This refers to the actual operation time of the components on production line l in the process.

[0009] Preferably, the production and transportation processes of prefabricated components are divided into interruptible sequential processes, uninterrupted sequential processes, interruptible parallel manual processes, and uninterrupted parallel non-manual processes based on the process characteristics. Interruptible sequential processes include mold assembly, embedded part integration, mold disassembly, and surface finishing; Uninterrupted sequential processes include concrete molding; Interruptible parallel manual processes include component transfer; Uninterrupted parallel non-manual processes include maintenance and control; The first cumulative time is obtained by calculating the sum of the completion time of the previous sub-process of the prefabricated component and the actual operation time of the current sub-process. The completion time of the interruptible sequential process is obtained by determining the later of the first cumulative time and the completion time of the previous prefabricated component in the current sub-process. The determination process includes: If the first cumulative time falls within the working hours of the current working day, the completion time value is the first cumulative time value; If the first cumulative time exceeds the working hours of the current working day, the completion time value is the sum of the first cumulative time value and the non-working hours. The completion time of the uninterrupted sequential process is obtained by determining the later of the first cumulative time and the completion time of the previous prefabricated component in the current sub-process. The determination process includes: If the first cumulative time falls within the total working hours of the current workday, including overtime, then the completion time value is the first cumulative time value; If the first cumulative time exceeds the total working hours of the current working day including overtime, it needs to be postponed to the start of the next working day and started immediately at the start of that working day. The completion time value is the sum of the start time of the next working day and the operation time of the current sub-process. The theoretical end time is obtained by summing the time when the prefabricated component enters the current sub-process with the actual operation time of the current sub-process. The completion time of the uninterrupted parallel non-manual processes is then determined based on this theoretical end time. The determination process includes: If the theoretical end time is not later than the start time of the next working day, the completion time value is the theoretical end time value; If the theoretical end time is later than the start time of the next working day, the completion time value is the start time of the next working day; The second cumulative time is obtained by summing the completion time of the previous sub-process of the prefabricated component with the actual operation time of the current sub-process. The completion time of interruptible parallel non-manual processes is judged based on the second cumulative time. The judgment process includes: If the second cumulative time falls within the total working hours of the current workday, including overtime, then the completion time value is the second cumulative time value; If the second cumulative time exceeds the total working hours of the current workday including overtime, the completion time value is the sum of the start time of the next workday and the operation time of the current sub-process; The total production and transportation time of prefabricated components is obtained by adding up the completion times of all the production and transportation processes.

[0010] Preferably, the collaborative module includes a generation unit, an analysis unit, and a feedback unit; The generation unit is used to receive the production and transportation time of prefabricated components that does not conform to the prefabricated component demand plan, input the production and transportation time of prefabricated components that does not conform to the prefabricated component demand plan into the BIM model, simulate conflicts in the BIM model, and send the simulation conflict results to relevant parties. The analysis unit is used to receive the internal opinions of each relevant party, quantify the internal opinions to obtain an internal opinion vector, calculate the internal opinion vector using a predefined weight matrix to obtain an equilibrium opinion vector, calculate the arithmetic mean of all elements in the equilibrium opinion vector to obtain the equilibrium opinion, and send the equilibrium opinion to the feedback unit. The feedback unit is used to receive confirmation identifiers and equilibrium opinions, and send the confirmation identifiers and equilibrium opinions to relevant parties. If the equilibrium opinions are sent to relevant parties, the BIM model and prefabricated component demand plan are updated. The relevant parties include the construction party, component factory and logistics party.

[0011] Preferably, the predefined weight matrix is ​​an m×m square matrix, where each element represents the weight of opinions put forward by the relevant parties in a random combination, and the sum of the weights in each row of the weight matrix is ​​set to 1. The diagonal elements of the weight matrix are self-circulating weights, and all self-circulating weights are greater than 0.

[0012] Preferably, the intrinsic opinion vector is calculated using a predefined weight matrix to obtain an equilibrium opinion vector. The individual opinions of each relevant party in the equilibrium opinion vector satisfy a recursive relation, the mathematical expression of which is: ; Among them, R j For the individual opinions of the relevant parties, W jj For the self-circulating weights of the relevant parties, As the inherent opinions of the relevant parties, Rk For the individual opinions of other relevant parties, w jk The weight of a relevant party relative to other relevant parties; Solving the recursive relation of individual opinions for each relevant party yields the equilibrium opinion vector, calculated as follows: ; in, To balance the opinion vectors, I is a constant matrix, W is a predefined weight matrix, and D is a self-circulating weight diagonal matrix. This is the intrinsic opinion vector.

[0013] Preferably, if balanced opinions are sent to relevant parties, updating the BIM model and prefabricated component demand plan specifically includes: Traverse the BIM model to find the conflicting prefabricated components corresponding to the conflict, obtain the planned start time of the conflicting prefabricated components, change the attribute value of the planned start time of the conflicting prefabricated components to the new time node in the equilibrium opinion, and postpone the construction progress bound to the conflicting prefabricated components accordingly according to the new time node. Based on the new time node, perform forward and reverse calculations to obtain the new prefabricated component demand plan.

[0014] The BIM-based prefabricated building construction information management method includes the following steps: Step S1: Obtain the prefabricated component demand plan based on the BIM model; Step S2: Calculate the production and transportation time of prefabricated components based on the prefabricated component demand plan and the obtained construction schedule plan, and determine whether the production and transportation time of prefabricated components meets the prefabricated component demand plan; Step S3: Based on the judgment result, the production and transportation time of prefabricated components that do not meet the prefabricated component demand plan is sent to the BIM model to obtain the internal opinions of relevant parties. The internal opinions and the predefined weight matrix are calculated to obtain the balanced opinions, and the balanced opinions are fed back to the BIM model.

[0015] The beneficial effects of this invention are as follows: By using a flow workshop scheduling method to calculate the production and transportation time of prefabricated components for processes with different characteristics, and by using a predefined weight matrix for recursive collaboration, the game process of multiple stakeholders is transformed into a computable equilibrium opinion vector, which improves the efficiency of cross-organizational collaboration. The dynamic adjustment mechanism ensures that the plan matches the actual needs, achieving efficient collaboration. Furthermore, with the support of BIM technology, the management efficiency and resource utilization of prefabricated building projects are improved. Attached Figure Description

[0016] Figure 1 This is a basic flowchart of a BIM-based prefabricated building construction information management system provided in one embodiment of the present invention.

[0017] Figure 2 A flowchart illustrating the steps of a BIM-based prefabricated building construction information management method according to an embodiment of the present invention. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1, referring to Figure 1 As one embodiment of the present invention, a BIM-based prefabricated building construction information management system is provided, including a construction module, a calculation module, and a collaboration module: The building block is used to obtain prefabricated component demand plans based on BIM models; The calculation module is used to calculate the production and transportation time of prefabricated components based on the prefabricated component demand plan and the obtained construction schedule plan, and to determine whether the prefabricated component production and transportation time meets the prefabricated component demand plan. The collaboration module is used to send the production and transportation time of prefabricated components that do not meet the prefabricated component demand plan to the BIM model based on the judgment results, obtain the internal opinions of relevant parties, calculate the equilibrium opinion based on the internal opinions and the predefined weight matrix, and feed the equilibrium opinion back to the construction module.

[0020] This method calculates the production and transportation time of prefabricated components for different processes using a flow workshop scheduling approach, and recursively coordinates using a predefined weight matrix. This transforms the game process of multiple stakeholders into a computable equilibrium opinion vector, improving cross-organizational collaboration efficiency. A dynamic adjustment mechanism ensures that the plan matches the actual needs, achieving efficient collaboration. Furthermore, with the support of BIM technology, it enhances the management efficiency and resource utilization of prefabricated building projects.

[0021] The building blocks include BIM model building units and splitting units; BIM model building units are used to acquire the target building's 3D model and construction progress data, and to build a BIM model based on the target building's 3D model and construction progress data; Construction progress data includes the planned start time, planned end time, actual start time, actual end time, and current percentage of completion for each construction task. The split unit is used to obtain the construction schedule plan. The construction schedule plan is split into work nodes by using the work breakdown method. The split work nodes are then linked to the BIM model through BIM software to generate the prefabricated component demand plan, which includes the quarterly, monthly and daily demand quantities.

[0022] In a specific embodiment, the work breakdown structure method decomposes the construction schedule plan by vertically decomposing it from top to bottom. It starts with the project objectives, then moves to specific tasks, and then decomposes the tasks into work, ultimately dividing them into specific work nodes.

[0023] The calculation module includes a calculation unit and a judgment unit; The calculation unit is used to calculate the production and transportation process of prefabricated components using the flow workshop scheduling method and the prefabricated component demand plan, and to obtain the production and transportation time of prefabricated components. The judgment unit is used to determine whether the production and transportation time of prefabricated components meets the prefabricated component demand plan; If the production and transportation time of prefabricated components meets the prefabricated component demand plan, then the production and transportation time of prefabricated components is marked with a confirmation identifier and sent to the collaboration module; If the production and transportation time of prefabricated components does not meet the prefabricated component demand plan, the production and transportation time of prefabricated components will be sent to the collaboration module.

[0024] In a specific embodiment, a predefined confirmation identifier is written into the production and transportation time of the batch of prefabricated components, and this identifier is bound to the corresponding prefabricated component and the associated construction schedule in the BIM model. The production and transportation time is scientifically predicted through precise calculations of process characteristics and scheduling by the calculation unit. A judgment unit then makes a determination, marking compliant plans to improve efficiency and collaboratively intervening in abnormal plans.

[0025] The formula for calculating the completion time of each process according to the assembly line scheduling method is as follows: ; ; Among them, J l,j On the l-th production line, the production sequence is j (j≤n). l Precast components, N l,k For the k-th process on production line l, P l,j,k This refers to the actual operation time of the components on production line l in the process.

[0026] In a specific embodiment, a basis is provided for the specific calculation rules of interruptible sequential processes, non-interruptible sequential processes, interruptible parallel manual processes, and non-interruptible parallel non-manual processes.

[0027] Based on process characteristics, the production and transportation processes of prefabricated components are divided into interruptible sequential processes, uninterrupted sequential processes, interruptible parallel manual processes, and uninterrupted parallel non-manual processes. Interruptible sequential processes include mold assembly, embedded part integration, mold disassembly, and surface finishing; Uninterrupted sequential processes include concrete molding; Interruptible parallel manual processes include component transfer; Uninterrupted parallel non-manual processes include maintenance and control; The first cumulative time is obtained by calculating the sum of the completion time of the previous sub-process of the prefabricated component and the actual operation time of the current sub-process. The completion time of the interruptible sequential process is obtained by determining the later of the first cumulative time and the completion time of the previous prefabricated component in the current sub-process. The determination process includes: If the first cumulative time falls within the working hours of the current working day, the completion time value is the first cumulative time value; If the first cumulative time exceeds the working hours of the current working day, the completion time value is the sum of the first cumulative time value and the non-working hours. The completion time of an uninterrupted sequential process is obtained by determining the later of the first cumulative time and the completion time of the previous prefabricated component in the current sub-process. The determination process includes: If the first cumulative time falls within the total working hours of the current workday, including overtime, then the completion time value is the first cumulative time value; If the first cumulative time exceeds the total working hours of the current working day including overtime, it needs to be postponed to the start of the next working day and started immediately at the start of that working day. The completion time value is the sum of the start time of the next working day and the operation time of the current sub-process. The theoretical end time is obtained by summing the time when the precast component enters the current sub-process with the actual operation time of the current sub-process. The completion time of the uninterrupted parallel non-manual processes is then determined based on the theoretical end time. The determination process includes: If the theoretical end time is not later than the start time of the next working day, the completion time value is the theoretical end time value; If the theoretical end time is later than the start time of the next working day, the completion time value is the start time of the next working day; The second cumulative time is obtained by summing the completion time of the previous sub-process of the prefabricated component with the actual operation time of the current sub-process. The completion time of interruptible parallel non-manual processes is judged based on the second cumulative time. The judgment process includes: If the second cumulative time falls within the total working hours of the current workday, including overtime, then the completion time value is the second cumulative time value; If the second cumulative time exceeds the total working hours of the current workday including overtime, the completion time value is the sum of the start time of the next workday and the operation time of the current sub-process; The total production and transportation time of prefabricated components is obtained by adding up the completion times of all the production and transportation processes.

[0028] In a specific embodiment, the processes are arranged sequentially as follows: mold assembly, embedded part integration, concrete molding, curing and control, mold disassembly, surface finishing, and component transfer. Interruptible sequential processes include mold assembly, embedded part integration, mold disassembly, and surface finishing, meaning that only one task can be performed during production. If the working time is insufficient to complete this process, production will be temporarily suspended and resume on the next working day. Uninterruptible sequential processes include concrete molding, meaning that once this work begins on precast components, it must continue until completion. Therefore, if this work cannot be completed during regular working hours, overtime must be arranged. If the work still cannot be completed within the permitted overtime hours of the day, it must be postponed to the next working day. Interruptible parallel manual processes include component transfer, indicating that multiple tasks can be performed simultaneously, tasks not completed within the current working day can be carried over to the next working day, and processes requiring manual operation. Uninterruptible parallel non-manual processes include curing and control, indicating that multiple precast components can be processed simultaneously without manual intervention.

[0029] Operation time is the product of demand and unit time quota.

[0030] The working hours are from 8:00 AM to 5:00 PM, and the non-working hours are from 8:00 PM to 8:00 AM the next day. The total working hours, including overtime, are the sum of the allowed overtime hours and the working hours. The allowed overtime hours are from 5:00 PM to 8:00 PM.

[0031] The collaborative module includes a generation unit, an analysis unit, and a feedback unit; The generation unit is used to receive the production and transportation time of prefabricated components that does not conform to the prefabricated component demand plan, input the production and transportation time of prefabricated components that does not conform to the prefabricated component demand plan into the BIM model, simulate the conflict in the BIM model, and send the simulation conflict results to the relevant parties. The analysis unit is used to receive the internal opinions of all relevant parties, quantify the internal opinions to obtain an internal opinion vector, calculate the internal opinion vector using a predefined weight matrix to obtain an equilibrium opinion vector, calculate the arithmetic mean of all elements in the equilibrium opinion vector to obtain the equilibrium opinion, and send the equilibrium opinion to the feedback unit. The feedback unit is used to receive confirmation identifiers and equilibrium opinions, and send the confirmation identifiers and equilibrium opinions to relevant parties. If the equilibrium opinions are sent to relevant parties, the BIM model and prefabricated component demand plan are updated. Relevant parties include construction companies, component manufacturers, and logistics companies.

[0032] In a specific embodiment, the analysis unit quantifies the inherent opinions of each relevant party and calculates the inherent opinion vector using a predefined weight matrix to obtain an equilibrium opinion vector, thus converging divergent subjective opinions into a single, data-driven equilibrium opinion. The feedback unit obtains the equilibrium opinion and sends it to relevant parties for confirmation and distribution, driving the update of the BIM model and component demand plan, forming a closed loop. This establishes a decision-making loop among the construction party, component factory, and logistics party, replacing the inefficient negotiation mode that relies on manual meetings and subjective judgment.

[0033] The predefined weight matrix is ​​an m×m square matrix, where each element represents the weight of opinions put forward by the relevant parties in a random combination, and the sum of the weights in each row of the weight matrix is ​​set to 1. In this matrix, the diagonal elements are self-circulating weights, and all self-circulating weights are greater than 0.

[0034] In a specific implementation, each relevant party has its own weight, which is a self-circulating weight and is greater than zero. Each element in the predefined weight matrix is ​​a quantified influence score. For example, a higher element value represents the value between the construction company and the component manufacturer, meaning that the construction company's opinion has a greater influence on the component manufacturer's decision in subsequent calculations. This aggregates scattered and even conflicting opinions into a unified weighting basis.

[0035] The intrinsic opinion vector is calculated using a predefined weight matrix to obtain the equilibrium opinion vector. The individual opinions of each stakeholder in the equilibrium opinion vector satisfy a recursive relation, the mathematical expression of which is: ; Among them, R j For the individual opinions of the relevant parties, W jj For the self-circulating weights of the relevant parties, As the inherent opinions of the relevant parties, R k For the individual opinions of other relevant parties, w jk The weight of a relevant party relative to other relevant parties; In a specific embodiment, the mathematical expression defines that the individual opinion of each relevant party depends on the individual opinions of other relevant parties, constituting a recursive problem that needs to be solved simultaneously.

[0036] By solving the recursive relation of individual opinions for each relevant party, the equilibrium opinion vector is obtained, and the calculation expression is as follows: ; in, To balance the opinion vectors, I is a constant matrix, W is a predefined weight matrix, and D is a self-circulating weight diagonal matrix. This is the intrinsic opinion vector.

[0037] In a specific embodiment, a predefined weight matrix quantifies the influence among stakeholders into a matrix. The sum of weights in each row is 1, ensuring normalization of opinion aggregation. Self-circulating weights greater than zero ensure that each stakeholder adheres to their professional judgment, providing a stable foundation for subsequent group decision-making. Furthermore, the interaction of group opinions is defined through recursion. This interaction reveals that the final opinion of any stakeholder depends simultaneously on their internal opinions and cyclical dependencies with the opinions of others. A matrix equation is used to solve for this interaction, yielding an equilibrium opinion vector. This equilibrium opinion vector integrates the initial positions of all parties and reflects the organizational influence structure, driving the BIM model update schedule and component demand plan, thus achieving the transformation from manual negotiation to algorithmic consensus.

[0038] If balanced opinions are sent to relevant parties, the updates to the BIM model and prefabricated component requirements plan specifically include: Traverse the BIM model to find the conflicting precast components, obtain the planned start time of the conflicting precast components, change the attribute value of the planned start time of the conflicting precast components to the new time node in the equilibrium opinion, and postpone the construction progress bound to the conflicting precast components accordingly according to the new time node. Based on the new time node, perform forward and reverse calculations to obtain the new precast component demand plan.

[0039] In a specific embodiment, forward calculation starts with the new time node of the conflicting prefabricated component and sequentially calculates the earliest start and finish time of the subsequent construction progress until a new final completion date is obtained. Reverse calculation starts with the new final completion date and sequentially calculates the latest start and finish time of the construction progress used, identifies the new critical path and calculates the floating time of each construction progress.

[0040] In a specific embodiment, a component factory needs to supply two prefabricated projects, A and B, within the same company, sharing production lines and transport vehicles. Calculations show that the production and transportation time for irregularly shaped components in Project A will exceed the original plan by 4 days, while standard components in Project B will be delayed by 2.1 days due to production line occupation. Production line and transportation resources cannot simultaneously meet the needs of both projects. At this point, the system uses a predefined weight matrix to collaboratively calculate the inherent opinion vectors of each party, generating a balanced opinion vector. The output is then transformed into an executable decision. The executable decision is that the system decides that Project A accepts a 0.8-day delay, and Project B bears a 2.1-day delay to resolve the production priority conflict. This drives the production plan to be compressed to 4.3 days, the logistics plan to be optimized to 4.9 days, and the BIM model and component demand plan are updated based on the balanced opinion of 2.5 days.

[0041] Example 2, refer to Figure 2 A BIM-based method for managing construction information of prefabricated buildings is provided, including the following steps: Step S1: Obtain the prefabricated component demand plan based on the BIM model; Step S2: Calculate the production and transportation time of prefabricated components based on the prefabricated component demand plan and the obtained construction schedule plan, and determine whether the prefabricated component production and transportation time meets the prefabricated component demand plan. Step S3: Based on the judgment results, the production and transportation time of prefabricated components that do not meet the prefabricated component demand plan is sent to the BIM model to obtain the internal opinions of relevant parties. The internal opinions and the predefined weight matrix are calculated to obtain the balanced opinions, and the balanced opinions are fed back to the BIM model.

[0042] This invention calculates the production and transportation time of prefabricated components through a flow workshop scheduling method and processes with different characteristics. It also uses a predefined weight matrix for recursive collaboration, transforming the game process of multiple stakeholders into a computable equilibrium opinion vector, thereby improving cross-organizational collaboration efficiency. Through a dynamic adjustment mechanism, it ensures that the plan matches the actual needs, achieving efficient collaboration. Furthermore, with the support of BIM technology, it forms a systematic solution for collaborative management of the prefabricated building supply chain, effectively improving the accuracy of progress control and the efficiency of cross-organizational collaboration.

[0043] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A BIM-based fabricated building construction information management system, characterized by, The method comprises a construction module, a calculation module and a coordination module: The construction module is configured to obtain a prefabricated component demand plan based on a BIM model; The calculation module is configured to calculate a prefabricated component production and transportation time according to the prefabricated component demand plan and an obtained construction progress plan, and determine whether the prefabricated component production and transportation time meets the prefabricated component demand plan; The coordination module is configured to send, based on a determination result, the prefabricated component production and transportation time that does not meet the prefabricated component demand plan to the BIM model, obtain internal opinions of relevant parties, calculate the internal opinions and a predefined weight matrix to obtain balanced opinions, and feed back the balanced opinions to the construction module. 2.The BIM-based fabricated building construction information management system of claim 1, wherein, The construction module comprises a BIM model construction unit and a splitting unit; The BIM model construction unit is configured to obtain a target building three-dimensional model and construction progress data, and construct a BIM model according to the target building three-dimensional model and the construction progress data; The construction progress data comprises a planned start time, a planned end time, an actual start time, an actual end time and a current completion percentage of a construction task; The splitting unit is configured to obtain a construction progress plan, split the construction progress plan by a work decomposition method to obtain split work nodes, associate the split work nodes with the BIM model through a BIM software, and generate a prefabricated component demand plan, which comprises quarterly, monthly and daily demand amounts. 3.The BIM-based fabricated building construction information management system of claim 2, wherein, The calculation module comprises a calculation unit and a determination unit; The calculation unit is configured to calculate a prefabricated component production and transportation process by a flow shop scheduling method and a prefabricated component demand plan to obtain a prefabricated component production and transportation time; The determination unit is configured to determine whether the prefabricated component production and transportation time meets the prefabricated component demand plan; If the prefabricated component production and transportation time meets the prefabricated component demand plan, a confirmation identifier is marked on the prefabricated component production and transportation time and sent to the coordination module; If the prefabricated component production and transportation time does not meet the prefabricated component demand plan, the prefabricated component production and transportation time is sent to the coordination module. 4.The BIM-based fabricated building construction information management system of claim 3, wherein, A calculation expression for calculating a completion time of each process according to the flow shop scheduling method is: ； ； Among them, J l,j On the l-th production line, the production sequence is j (j≤n). l Precast components, N l,k For the k-th process on production line l, P l,j,k This refers to the actual operation time of the components on production line l in the process. 5.The BIM-based fabricated building construction information management system of claim 4, wherein, According to the process characteristics, the prefabricated component production and transportation process is divided into interruptible sequential processes, non-interruptible sequential processes, interruptible parallel manual processes and non-interruptible parallel non-manual processes; The interruptible sequential processes comprise mold assembly, embedded part integration, mold disassembly and surface finishing; The non-interruptible sequential processes comprise concrete molding; The interruptible parallel manual processes comprise component transfer; The non-interruptible parallel non-manual processes comprise maintenance control; A first cumulative time is obtained by calculating a sum of a previous sub-process completion time of the prefabricated component and an actual operation time of a current sub-process, and the completion time of the interruptible sequential process is obtained by determining a later one of the first cumulative time and a completion time of a previous prefabricated component in the current sub-process, and the determination process comprises: If the first cumulative time is within a working time period of a current working day, the completion time value is the first cumulative time value; If the first cumulative time exceeds the working time period of the current workday, the completion time value is the sum of the first cumulative time value and the non-working time period; The completion time of the non-interruptible sequential process is obtained by judging the later one between the first cumulative time and the completion time of the previous prefabricated component in the current sub-process, and the judgment process includes: If the first cumulative time is within the total working hours of the current workday including overtime, the completion time value is the first cumulative time value; If the first cumulative time exceeds the total working hours of the current workday including overtime, it needs to be postponed to the start of the next workday and be put into immediately at the start of the workday, and the completion time value is the sum of the start time of the next workday and the operation time of the current sub-process; The theoretical end time is obtained by calculating the time when the prefabricated component enters the current sub-process and the actual operation time of the current sub-process, and the completion time of the non-interruptible parallel non-manual process is judged by the theoretical end time, and the judgment process includes: If the theoretical end time is not later than the start time of the next workday, the completion time value is the theoretical end time value; If the theoretical end time is later than the start time of the next workday, the completion time value is the start time of the next workday; The second cumulative time is obtained by calculating the completion time of the previous sub-process of the prefabricated component and the actual operation time of the current sub-process, and the completion time of the interruptible parallel non-manual process is judged by the second cumulative time, and the judgment process includes: If the second cumulative time is within the total working hours of the current workday including overtime, the completion time value is the second cumulative time value; If the second cumulative time exceeds the total working hours of the current workday including overtime, the completion time value is the sum of the start time of the next workday and the operation time of the current sub-process; The completion time of all prefabricated component production and transportation processes is added to obtain the prefabricated component production and transportation time. 6.The BIM-based fabricated building construction information management system of claim 5, wherein, The coordination module includes a generating unit, an analyzing unit and a feedback unit; The generating unit is used for receiving the prefabricated component production and transportation time that does not conform to the prefabricated component demand plan, inputting the prefabricated component production and transportation time that does not conform to the prefabricated component demand plan into the BIM model, simulating conflicts in the BIM model, and sending the simulation conflict results to relevant parties; The analyzing unit is used for receiving the internal opinions of each relevant party, quantifying the internal opinions to obtain an internal opinion vector, calculating the internal opinion vector through a pre-defined weight matrix to obtain a balanced opinion vector, calculating the arithmetic mean of all elements in the balanced opinion vector to obtain a balanced opinion, and sending the balanced opinion to the feedback unit; The feedback unit is used for receiving a confirmation identifier and the balanced opinion, sending the confirmation identifier and the balanced opinion to the relevant parties, and updating the BIM model and the prefabricated component demand plan if the balanced opinion is sent to the relevant parties, wherein the relevant parties include a construction party, a component factory and a logistics party. 7.The BIM-based fabricated building construction information management system of claim 6, wherein, The pre-defined weight matrix is an m×m square matrix, and each element represents the weight of the opinions proposed by the randomly combined relevant parties to each other, and the sum of the weights of each row of the weight matrix is set to 1. The diagonal elements of the weight matrix are self-loop weights, and the self-loop weights are all greater than 0. 8.The BIM-based fabricated building construction information management system of claim 7, wherein, The intrinsic opinion vector is calculated through a predefined weight matrix to obtain a balanced opinion vector, and the individual opinion of each stakeholder in the balanced opinion vector satisfies a recursive relationship, and a mathematical expression of the recursive relationship is: ； wherein R j is the individual opinion of the related party, jj is the self-loop weight of the related party, is the intrinsic opinion of the related party, k is the individual opinion of the other related party, jk is the weight of the related party on the other related party; The recursive relationship of the individual opinion of each stakeholder is solved to obtain the balanced opinion vector, and a calculation expression is: ； wherein, is the balanced opinion vector, I is a constant matrix, W is a predefined weight matrix, D is a self-loop weight diagonal matrix, is the intrinsic opinion vector. 9.The BIM-based fabricated building construction information management system of claim 8, wherein, If the balanced opinion is sent to the stakeholders, updating the BIM model and the prefabricated component demand plan specifically includes: Traversing the BIM model to find a conflict prefabricated component corresponding to a conflict, obtaining a planned start time of the conflict prefabricated component, changing an attribute value of the planned start time of the conflict prefabricated component to a new time node in the balanced opinion, and delaying a construction schedule bound to the conflict prefabricated component according to the new time node, performing forward calculation and reverse calculation based on the new time node to obtain a new prefabricated component demand plan. 10.A method for managing construction information of a BIM-based fabricated building, characterized by, The method comprises the following steps: Step S1: obtaining a prefabricated component demand plan based on a BIM model; Step S2: calculating a prefabricated component production and transportation time according to the prefabricated component demand plan and an obtained construction schedule plan, and judging whether the prefabricated component production and transportation time meets the prefabricated component demand plan; Step S3: based on a judgment result, sending the prefabricated component production and transportation time that does not meet the prefabricated component demand plan to the BIM model, obtaining intrinsic opinions of the stakeholders, calculating the intrinsic opinions and a predefined weight matrix to obtain balanced opinions, and feeding back the balanced opinions to the BIM model.

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