Fabricated building informatization construction method and system

Abstract

The invention relates to the technical field of building information model application, in particular to a fabricated building informatization construction method and system. According to the method, the BIM design model is constructed, the component information is obtained, the construction progress plan and the BIM design model are associated, the component production plan is obtained, the purchase plan is made according to the component production plan, and the project cost is estimated. And then obtaining the actual cost of each stage according to the project period, designing a deviation threshold value, judging that the cost deviation is unreasonable when the deviation value of the actual cost of the stage and the estimated project cost reaches the deviation threshold value, and predicting the cost change of the subsequent stage of the project according to historical data and the raw material price change. And finally, the purchase plan and the component production plan are adjusted according to the prediction result, and the project cost is estimated again. Through the scheme, the whole-process monitoring and adjustment of the assembly building cost can be effectively realized, and the accuracy and efficiency of project cost management are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building information model application, and in particular to an information construction method and system for assembled building. Background Art

[0002] Prefabricated buildings transfer a large number of on-site operations in traditional construction methods to factories. After the building components are processed and manufactured in the factory, they are transported to the construction site and assembled and installed on site through reliable connection methods. Compared with traditional construction, its construction process is not only faster and more efficient, but also can greatly reduce the discharge of construction waste and wastewater, and can reduce the generation of construction pollution while improving construction efficiency.

[0003] With the rapid development of smart city construction, the realization of "integrated design, production and assembly" of prefabricated buildings has gradually been combined with BIM integrated design technology. Through BIM technology, the construction, structure, mechanical and electrical, and decoration disciplines are more effectively connected, realizing information interaction and sharing of prefabricated building design, production, transportation, assembly, and operation and maintenance, and realizing integrated collaborative work of the entire process of prefabricated buildings.

[0004] However, with the continuous development of integrated construction of prefabricated buildings, the complexity of its project management continues to increase, especially in terms of cost control. In traditional cost control, there are often large errors in the estimation and control of project costs, which is mainly due to the lack of an effective tool and method to monitor and analyze the full-cycle cost of the project in real time. In addition, due to fluctuations in raw material prices and various unforeseen factors in the construction process, the project cost will be affected, making the control of project costs more difficult. Therefore, the adjustment of cost budgets in traditional construction processes often relies on manual calculations and empirical judgments, which have problems such as low efficiency and poor accuracy. Therefore, seeking an efficient and accurate information-based construction method has become a demand for the development of the industry. Summary of the invention

[0005] The technical problem solved by the present invention is to provide an information-based construction method and system for prefabricated buildings to solve the problem that traditional cost management methods are overly dependent on manual calculations and empirical judgments, and are inefficient and inaccurate.

[0006] The basic solution provided by the present invention is a method for the information construction of an assembled building, comprising the steps of:

[0007] S1: Build a BIM design model and obtain component information according to the construction design plan;

[0008] S2: Associate the construction schedule with the BIM design model to obtain the component production plan;

[0009] S3: Develop a procurement plan based on the component production plan and estimate the project cost and divide the project cycle into phases to estimate the cost;

[0010] S4: Obtain the actual cost of each stage according to the project cycle and design a deviation threshold. When the deviation between the actual cost of a stage and the estimated cost of the stage reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost changes of subsequent stages of the project are predicted based on historical data and changes in raw material prices.

[0011] S5: Adjust the procurement plan and component production plan based on the forecast results and re-estimate the project cost.

[0012] Further, the S1 comprises the steps of:

[0013] S101: Based on the BIM design platform, generate the corresponding component library according to the construction design plan;

[0014] S102: Build a corresponding BIM model according to the construction design plan and component library;

[0015] S103: Split the BIM model to obtain component information.

[0016] Further, the S2 comprises the steps of:

[0017] S201: Obtain the construction schedule and associate it with the BIM design model;

[0018] S202: Obtain component information involved in each stage of the construction schedule and formulate a component production plan.

[0019] Further, the S3 comprises the steps of:

[0020] S301: Analyze the raw material list of components required at each stage according to the component production plan;

[0021] S302: Obtain the price of each raw material according to the raw material list and formulate a procurement plan;

[0022] S303: Estimate the project cost based on the procurement plan and component production plan and estimate the cost according to the stages of the project cycle.

[0023] Further, the S4 comprises the steps of:

[0024] S401: Calculate the actual cost of each stage according to the project cycle;

[0025] S402: Set the stage deviation threshold. When the deviation between the actual cost and the estimated cost reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost change in the subsequent stages of the project is predicted based on historical data and real-time changes in raw material prices. The calculation process is as follows:

[0026]

[0027] In the formula, C predicted is the stage prediction cost, C historical，i is the historical average cost of the i-th raw material, W i is the weight of the i-th raw material, P real-time，j is the real-time price of the jth raw material, Q j is the quantity of the jth raw material, F adjustment is the adjustment factor.

[0028] Further, the S5 comprises the steps of:

[0029] S501: Compare the stage forecast cost with the stage estimated cost;

[0030] S502: Adjust the estimated cost according to the comparison result. If the stage forecast cost is higher than the stage estimated cost, adjust the procurement plan and production plan to reduce the cost and re-estimate the project cost; if the stage forecast cost is lower than the stage estimated cost, update the stage estimated cost according to the stage forecast cost;

[0031] S503: Update the project budget based on the adjusted phase estimated cost and incorporate it into the construction schedule for the next phase.

[0032] An information-based construction system for assembled buildings, comprising a component analysis module, a component production analysis module, a project cost estimation module, a deviation analysis module and a project correction module;

[0033] The component analysis module is used to construct a BIM design model and obtain component information according to the construction design plan;

[0034] The component production analysis module is used to associate the construction schedule with the BIM design model to obtain a component production plan;

[0035] The project cost estimation module is used to formulate a procurement plan and estimate the project cost according to the component production plan and to estimate the cost according to the phases of the project cycle;

[0036] The deviation analysis module is provided with a deviation threshold. The deviation analysis module obtains the actual cost of each stage according to the project cycle and designs the deviation threshold. When the deviation value between the actual cost of the stage and the estimated cost of the stage reaches the deviation threshold, the cost deviation is judged to be unreasonable, and the cost changes of the subsequent stages of the project are predicted based on historical data and changes in raw material prices;

[0037] The project revision module is used to adjust the procurement plan and component production plan according to the forecast results and re-estimate the project cost.

[0038] Further, the project cost estimation module includes a raw material analysis module, a planning module and an estimation module;

[0039] The material analysis module is used to analyze the raw material list of components required at each stage according to the component production plan;

[0040] The planning module is used to obtain the price of each raw material according to the raw material list and formulate a procurement plan;

[0041] The estimation module is used to estimate the project cost according to the procurement plan and the component production plan and to estimate the cost according to the stages of the project cycle.

[0042] Further, the deviation analysis module includes a cost calculation module, a deviation analysis module and a deviation control module;

[0043] The cost calculation module is used to calculate the actual cost of each stage according to the project cycle;

[0044] The deviation analysis module is provided with a stage deviation threshold. When the deviation between the actual cost of a stage and the estimated cost of a stage reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost change of the subsequent stage of the project is predicted based on the real-time changes of historical data and raw material prices. The calculation process is as follows:

[0045]

[0046] In the formula, C predicted is the stage prediction cost, C historical，i is the historical average cost of the i-th raw material, W i is the weight of the i-th raw material, P real-time，j is the real-time price of the jth raw material, Q j is the quantity of the jth raw material, F adjustment is the adjustment factor.

[0047] Further, the project revision module includes a difference analysis module, a cost adjustment module and a budget update module;

[0048] The difference analysis module is used to compare the stage forecast cost with the stage estimated cost;

[0049] The cost adjustment module is used to adjust the estimated cost according to the comparison result. If the stage forecast cost is higher than the stage estimated cost, the procurement plan and production plan are adjusted to reduce the cost and the project cost is re-estimated; if the stage forecast cost is lower than the stage estimated cost, the stage estimated cost is updated according to the stage forecast cost;

[0050] The budget update module is used to update the project budget according to the adjusted stage estimated cost and incorporate it into the construction schedule of the next stage.

[0051] The principle and advantage of the present invention are as follows: the present invention obtains the component production plan by constructing a BIM design model and obtaining component information, and then associates the construction schedule and the BIM design model, and then formulates a procurement plan and estimates the project cost based on the component production plan. During the project execution process, the actual cost of each stage is obtained according to the project cycle, and a deviation threshold is designed. When the deviation value between the actual cost of the stage and the estimated project cost reaches the deviation threshold, the cost deviation is judged to be unreasonable, and the cost changes in the subsequent stages of the project are predicted based on historical data and changes in raw material prices. Finally, the procurement plan and component production plan are adjusted according to the prediction results, and the project cost is re-estimated. Through this solution, the whole process monitoring and adjustment of the cost of assembled buildings can be effectively realized, and the accuracy and efficiency of project cost management can be improved, thereby providing strong support for the smooth implementation of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 The present invention is a flowchart of the steps of a first embodiment of an information-based construction method for assembled buildings.

[0053] Figure 2 This is a logic block diagram of a second embodiment of an information-based construction system for prefabricated buildings according to the present invention. DETAILED DESCRIPTION

[0054] The following is further described in detail through specific implementation methods:

[0055] The specific implementation process is as follows:

[0056] Embodiment 1

[0057] Embodiment 1 is basically as shown in the attached Figure 1 As shown, a method for information construction of assembled buildings includes the following steps:

[0058] S1: Build a BIM design model and obtain component information according to the construction design plan;

[0059] S2: Associate the construction schedule with the BIM design model to obtain the component production plan;

[0060] S3: Develop a procurement plan based on the component production plan and estimate the project cost and divide the project cycle into phases to estimate the cost;

[0061] S4: Obtain the actual cost of each stage according to the project cycle and design a deviation threshold. When the deviation between the actual cost of a stage and the estimated cost of the stage reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost changes of subsequent stages of the project are predicted based on historical data and changes in raw material prices.

[0062] S5: Adjust the procurement plan and component production plan based on the forecast results and re-estimate the project cost.

[0063] This solution builds a BIM design model and obtains component information, associates the construction schedule and the BIM design model, obtains the component production plan, and then formulates a procurement plan and estimates the project cost based on the component production plan. During the project execution, the actual cost of each stage is obtained according to the project cycle, and the deviation threshold is designed. When the deviation value between the actual cost of the stage and the estimated project cost reaches the deviation threshold, the cost deviation is judged to be unreasonable, and the cost changes in the subsequent stages of the project are predicted based on historical data and changes in raw material prices. Finally, the procurement plan and component production plan are adjusted according to the prediction results, and the project cost is re-estimated. This solution can effectively realize the full process monitoring and analysis of project costs, improve the accuracy and efficiency of project cost management, and provide strong support for the smooth implementation of the project.

[0064] Specifically, in this embodiment, S1 includes the steps of:

[0065] S101: Based on the BIM design platform, generate the corresponding component library according to the construction design plan;

[0066] S102: Build a corresponding BIM model according to the construction design plan and component library;

[0067] S103: Split the BIM model to obtain component information.

[0068] Through the BIM design platform, the corresponding component library can be quickly generated according to the construction design plan, and then the corresponding BIM model can be built, which greatly improves the design efficiency. By splitting the BIM model, detailed component information can be obtained, which helps to improve the accuracy of the design. The obtained component information can be used for subsequent component production plans, procurement plans, etc., providing basic data for project cost control. It is conducive to the information management of the entire project cost process and improves management efficiency and level.

[0069] The S2 comprises the steps of:

[0070] S201: Obtain the construction schedule and associate it with the BIM design model;

[0071] S202: Obtain component information involved in each stage of the construction schedule and formulate a component production plan.

[0072] In this embodiment, by associating the construction schedule with the BIM design model, the component information involved in each stage can be quickly obtained, and a component production plan can be formulated. The constructed component production plan provides a detailed basis for the subsequent management of the project, making project management more refined. By refining the production and installation plan of each component, the project team can better control the progress and quality of the project. This not only improves the accuracy of the construction plan, but also greatly improves the efficiency of the construction process. After accurately obtaining the component information, a more accurate procurement plan can be formulated according to actual needs to avoid waste of resources. At the same time, this also helps to arrange human and material resources more reasonably to ensure that the project proceeds smoothly as planned.

[0073] The S3 comprises the steps of:

[0074] S301: Analyze the raw material list of components required at each stage according to the component production plan;

[0075] S302: Obtain the price of each raw material according to the raw material list and formulate a procurement plan;

[0076] S303: Estimate the project cost based on the procurement plan and component production plan and estimate the cost according to the stages of the project cycle.

[0077] After obtaining the component production plan, this solution can make more reasonable purchasing decisions based on the raw material prices and optimize resource allocation by analyzing the component raw materials. By formulating a purchasing plan, resources can be reasonably allocated according to project needs, avoiding resource waste and ensuring the smooth progress of the project. By dividing the estimated cost into stages according to the project cycle, the project cost can be analyzed in stages, which helps the project management to better control and adjust the project budget and reduce the risk of overspending.

[0078] The S4 comprises the steps of:

[0079] S401: Calculate the actual cost of each stage according to the project cycle;

[0080] S402: Set the stage deviation threshold. When the deviation between the actual cost and the estimated cost reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost change in the subsequent stages of the project is predicted based on historical data and real-time changes in raw material prices. The calculation process is as follows:

[0081]

[0082] In the formula, C predicted is the stage prediction cost, C historical，i is the historical average cost of the i-th raw material, W i is the weight of the i-th raw material, P real-time，j is the real-time price of the jth raw material, Qj is the quantity of the jth raw material, F adjustment To adjust the coefficient, it is formulated based on actual market fluctuations, seasonal factors and policy changes combined with expert opinions.

[0083] The deviation threshold in this solution is set at 15%. When the deviation between the actual cost and the estimated cost of the stage reaches 15%, the cost deviation is unreasonable. By periodically calculating the deviation between the actual cost and the scheduled cost, the project team can quickly respond to the deviation in cost control and take timely adjustment measures. Based on the analysis results of the cost deviation, the project team can adjust the raw material procurement plan to adapt to market price fluctuations and changes in project requirements. When the cost deviation exceeds the preset threshold, it prompts project managers to conduct in-depth floating cost analysis and make more data-driven decisions. By continuously monitoring the deviation between the actual cost and the estimated cost, combined with historical data and trend analysis, the continuity and dynamism of cost control throughout the project cycle are strengthened.

[0084] The S5 comprises the steps of:

[0085] S501: Compare the stage forecast cost with the stage estimated cost;

[0086] S502: Adjust the estimated cost according to the comparison result. If the stage forecast cost is higher than the stage estimated cost, adjust the procurement plan and production plan to reduce the cost and re-estimate the project cost; if the stage forecast cost is lower than the stage estimated cost, update the stage estimated cost according to the stage forecast cost;

[0087] S503: Update the project budget based on the adjusted phase estimated cost and incorporate it into the construction schedule for the next phase.

[0088] Comparing the predicted cost of a stage with the actual cost of the stage, and comparing the difference between the predicted cost and the actual cost, provides an accurate basis for adjustment for project cost control. This not only helps to find budget deviations in a timely manner and take measures, but also allows for flexible adjustment of procurement and production plans according to changes to ensure optimal project costs. At the same time, the updated project budget and construction schedule can better guide the implementation of subsequent stages and improve the efficiency and effectiveness of the entire project management.

[0089] In summary, this solution integrates BIM technology and cost control to conduct real-time analysis and adjustment of prefabricated building construction, achieving accurate prediction, real-time monitoring and effective control of project costs. From design to construction, through automated data analysis and information management, resource allocation is optimized, the risk of cost overruns is reduced, and the accuracy and efficiency of decision-making are improved. At the same time, team collaboration is enhanced, the transparency and traceability of project management are improved, and the project is successfully completed on budget, which has significant economic and social benefits.

[0090] Embodiment 2

[0091] Embodiment 2 is as attached Figure 2 As shown, an information-based construction system for prefabricated buildings includes a component analysis module, a component production analysis module, a project cost estimation module, a deviation analysis module, and a project correction module.

[0092] The component analysis module is used to build a BIM design model and obtain component information based on the construction design plan.

[0093] In this embodiment, the component analysis module is based on the BIM design platform, generates a corresponding component library according to the construction design plan, and then builds a corresponding BIM model according to the construction design plan and the component library. After splitting the BIM model, the corresponding component information is obtained. Through the BIM design platform, the corresponding component library can be quickly generated according to the construction design plan, and then the corresponding BIM model can be built, which greatly improves the design efficiency. By splitting the BIM model, detailed component information can be obtained, which helps to improve the accuracy of the design. The obtained component information can be used for subsequent component production plans, procurement plans, etc., and provides basic data for project cost control. It is conducive to the information management of the entire process of project cost and improves management efficiency and level.

[0094] The component production analysis module is used to associate the construction schedule with the BIM design model to obtain the component production plan.

[0095] The component production parsing module first obtains the construction schedule and associates it with the BIM design model, then obtains the component information involved in each stage of the construction schedule and formulates the component production plan. By associating the construction schedule with the BIM design model, this embodiment can quickly obtain the component information involved in each stage and formulate a component production plan. The constructed component production plan provides a detailed basis for the subsequent management of the project, making project management more refined. By refining the production and installation plan of each component, the project team can better control the progress and quality of the project. This not only improves the accuracy of the construction plan, but also greatly improves the efficiency of the construction process. After accurately obtaining the component information, a more accurate procurement plan can be formulated according to actual needs to avoid waste of resources. At the same time, this also helps to arrange human and material resources more reasonably to ensure that the project proceeds smoothly as planned.

[0096] The project cost estimation module is used to formulate procurement plans and estimate project costs based on component production plans.

[0097] The project cost estimation module in this embodiment includes a raw material analysis module, a plan making module and an estimation module. The material analysis module is used to analyze the raw material list of the components required for each stage according to the component production plan. The plan making module is used to obtain the price of each raw material according to the raw material list and formulate a procurement plan. The estimation module is used to estimate the project cost according to the procurement plan, and the project cost includes conventional project cost and floating project cost. After obtaining the component production plan, the project cost estimation module can make more reasonable procurement decisions based on the raw material prices and optimize resource allocation by analyzing the raw materials of the components. By formulating a procurement plan, resources can be reasonably allocated according to project requirements, resource waste can be avoided, and the project can be carried out smoothly. By dividing the estimated cost of the stages according to the project cycle, the project cost can be analyzed in stages, which helps the project management to better control and adjust the project budget and reduce the risk of overspending.

[0098] The deviation analysis module is equipped with a deviation threshold. The deviation analysis module obtains the actual cost of each stage according to the project cycle. When the deviation value between the actual cost and the estimated project cost reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost changes in subsequent stages of the project are predicted based on historical data and the trend of raw material cost changes.

[0099] The deviation analysis module in this embodiment includes a cost calculation module and a deviation analysis module. The cost calculation module is used to calculate the actual cost according to the phases of the project cycle. The actual cost includes the phase actual cost and the cumulative actual cost. The deviation analysis module is provided with a phase deviation threshold. When the deviation value between the phase actual cost and the phase estimated cost reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost change of the subsequent phase of the project is predicted based on the historical data and the real-time changes of the raw material prices. The calculation process is as follows:

[0100]

[0101] In the formula, C predicted is the stage prediction cost, C historical，i is the historical average cost of the i-th raw material, W i is the weight of the i-th raw material, P real-time，j is the real-time price of the jth raw material, Q j is the quantity of the jth raw material, F adjustment is the adjustment coefficient. The deviation threshold in this solution is set at 15%. When the deviation between the actual cost of a stage and the estimated cost of the stage reaches 15%, the cost deviation is unreasonable. By periodically calculating the deviation between the actual cost and the scheduled cost, the project team can quickly respond to deviations in cost control and take timely adjustment measures. Based on the analysis results of the cost deviation, the project team can adjust the raw material procurement plan to adapt to market price fluctuations and changes in project requirements. When the cost deviation exceeds the preset threshold, it prompts project managers to conduct in-depth floating cost analysis and make more data-driven decisions. By continuously monitoring the deviation between the actual cost and the estimated cost, combined with historical data and trend analysis, the continuity and dynamism of cost control throughout the project cycle are enhanced.

[0102] The project revision module is used to compare the predicted cost changes of subsequent stages with the actual cost changes of the stages, and to revise the estimated costs based on the comparison results.

[0103] The project correction module in this embodiment includes a difference analysis module, a cost adjustment module and a budget update module. The difference analysis module is used to compare the stage forecast cost with the stage estimated cost, and analyze the difference between the forecast cost and the estimated cost. The cost adjustment module is used to adjust the estimated cost according to the comparison result. If the stage forecast cost is higher than the stage estimated cost, the procurement plan and production plan are adjusted to reduce the cost and re-estimate the project cost; if the stage forecast cost is lower than the stage estimated cost, the stage estimated cost is updated according to the stage forecast cost. The budget update module is used to update the project budget according to the adjusted stage estimated cost and incorporate it into the construction schedule of the next stage. The stage forecast cost is compared with the actual stage cost, and by comparing the difference between the forecast cost and the actual cost, an accurate adjustment basis is provided for project cost control. This not only helps to discover budget deviations in a timely manner and take measures, but also can flexibly adjust procurement and production plans according to changes to ensure the optimization of project costs. At the same time, the updated project budget and construction schedule can better guide the implementation of subsequent stages and improve the efficiency and effectiveness of the entire project management.

[0104] This solution integrates BIM technology and cost control to conduct real-time analysis and adjustment of prefabricated building construction, achieving accurate prediction, real-time monitoring and effective control of project costs. From design to construction, through automated data analysis and information management, resource allocation is optimized, the risk of cost overruns is reduced, and the accuracy and efficiency of decision-making are improved. At the same time, it enhances team collaboration, improves the transparency and traceability of project management, ensures that the project is completed smoothly on budget, and has significant economic and social benefits.

[0105] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for informatization of prefabricated building construction, characterized in that: Includes steps: S1: Build a BIM design model and obtain component information according to the construction design plan; S2: Associate the construction schedule with the BIM design model to obtain the component production plan; S3: Develop a procurement plan based on the component production plan and estimate the project cost and divide the project cycle into phases to estimate the cost; S4: Obtain the actual cost of each stage according to the project cycle and design a deviation threshold. When the deviation between the actual cost of a stage and the estimated cost of the stage reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost changes of subsequent stages of the project are predicted based on historical data and changes in raw material prices. S5: Adjust the procurement plan and component production plan based on the forecast results and re-estimate the project cost.

2. The method for informatization of prefabricated building construction according to claim 1, characterized in that: The S1 comprises the steps of: S101: Based on the BIM design platform, generate the corresponding component library according to the construction design plan; S102: Build a corresponding BIM model according to the construction design plan and component library; S103: Split the BIM model to obtain component information.

3. The method for informatization of prefabricated building construction according to claim 2, characterized in that: The S2 comprises the steps of: S201: Obtain the construction schedule and associate it with the BIM design model; S202: Obtain component information involved in each stage of the construction schedule and formulate a component production plan.

4. The method for informatization of prefabricated building construction according to claim 3, characterized in that: The S3 comprises the steps of: S301: Analyze the raw material list of components required at each stage according to the component production plan; S302: Obtain the price of each raw material according to the raw material list and formulate a procurement plan; S303: Estimate the project cost based on the procurement plan and component production plan and estimate the cost according to the stages of the project cycle.

5. The method for informatization of prefabricated building construction according to claim 4, characterized in that: The S4 comprises the steps of: S401: Calculate the actual cost of each stage according to the project cycle; S402: Set the stage deviation threshold. When the deviation between the actual cost and the estimated cost reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost change in the subsequent stages of the project is predicted based on historical data and real-time changes in raw material prices. The calculation process is as follows: In the formula, C predicted is the stage prediction cost, C historical,i is the historical average cost of the i-th raw material, W i is the weight of the i-th raw material, P real-time,j is the real-time price of the jth raw material, Q j is the quantity of the jth raw material, F adjustment is the adjustment factor.

6. The method for informatization of prefabricated building construction according to claim 5, characterized in that: The S5 comprises the steps of: S501: Compare the stage forecast cost with the stage estimated cost; S502: Adjust the estimated cost according to the comparison result. If the stage forecast cost is higher than the stage estimated cost, adjust the procurement plan and production plan to reduce the cost and re-estimate the project cost; if the stage forecast cost is lower than the stage estimated cost, update the stage estimated cost according to the stage forecast cost; S503: Update the project budget based on the adjusted phase estimated cost and incorporate it into the construction schedule for the next phase.

7. An information-based construction system for assembled buildings, characterized in that: It includes component analysis module, component production analysis module, project cost estimation module, deviation analysis module and project correction module; The component analysis module is used to construct a BIM design model and obtain component information according to the construction design plan; The component production analysis module is used to associate the construction schedule with the BIM design model to obtain a component production plan; The project cost estimation module is used to formulate a procurement plan and estimate the project cost according to the component production plan and to estimate the cost according to the project cycle. The deviation analysis module is provided with a deviation threshold. The deviation analysis module obtains the actual cost of each stage according to the project cycle and designs the deviation threshold. When the deviation value between the actual cost of the stage and the estimated cost of the stage reaches the deviation threshold, the cost deviation is judged to be unreasonable, and the cost changes of the subsequent stages of the project are predicted based on historical data and changes in raw material prices; The project revision module is used to adjust the procurement plan and component production plan according to the forecast results and re-estimate the project cost.

8. The prefabricated building information construction system according to claim 7, characterized in that: The project cost estimation module includes a raw material analysis module, a planning module and an estimation module; The material analysis module is used to analyze the raw material list of components required at each stage according to the component production plan; The planning module is used to obtain the price of each raw material according to the raw material list and formulate a procurement plan; The estimation module is used to estimate the project cost according to the procurement plan and the component production plan and to estimate the cost according to the stages of the project cycle.

9. The prefabricated building information construction system according to claim 8, characterized in that: The deviation analysis module includes a cost calculation module, a deviation analysis module and a deviation control module; The cost calculation module is used to calculate the actual cost of each stage according to the project cycle; The deviation analysis module is provided with a stage deviation threshold. When the deviation between the actual cost of a stage and the estimated cost of a stage reaches the deviation threshold, the cost deviation is judged to be unreasonable. The cost change of the subsequent stage of the project is predicted based on the real-time changes of historical data and raw material prices. The calculation process is as follows: In the formula, C predicted is the stage prediction cost, C historical,i is the historical average cost of the i-th raw material, W i is the weight of the i-th raw material, P real-time,j is the real-time price of the jth raw material, Q j is the quantity of the jth raw material, F adjustment is the adjustment factor.

10. The prefabricated building information construction system according to claim 9, characterized in that: The project revision module includes a difference analysis module, a cost adjustment module and a budget update module; The difference analysis module is used to compare the stage forecast cost with the stage estimated cost; The cost adjustment module is used to adjust the estimated cost according to the comparison result. If the stage forecast cost is higher than the stage estimated cost, the procurement plan and production plan are adjusted to reduce the cost and the project cost is re-estimated; if the stage forecast cost is lower than the stage estimated cost, the stage estimated cost is updated according to the stage forecast cost; The budget update module is used to update the project budget according to the adjusted stage estimated cost and incorporate it into the construction schedule of the next stage.

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