Construction site management method based on BIM technology

Abstract

A construction site management method based on a BIM technology specifically relates to the technical field of construction site management, and the scheme comprises the following steps: collecting basic data of distribution proportion, actual utilization rate and planned utilization rate of manpower, materials and equipment on a construction site by using the BIM technology and a data collection and integration module; the method comprises the following steps: firstly, sequentially calculating and outputting resource allocation efficiency ZF, a progress delay predicted value YY and a cost adjustment factor CT, secondly, calculating amount change after cost adjustment based on a result of the cost adjustment factor CT, and utilizing a project management adjustment module to adjust the amount change based on a result of the adjusted amount change. Reallocation of resources is carried out according to the emphasis of manpower, material and equipment allocation and utilization, dynamic balance among resource allocation, progress delay prediction and cost adjustment is realized, and the balance not only improves the efficiency and accuracy of construction site management, but also promotes continuous optimization and innovation of the construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of construction site management, and specifically, to a construction site management method based on BIM technology. Background Technique

[0002] With the rapid development of the construction industry, construction site management is facing more and more challenges. Traditional construction site management methods often rely on manual monitoring and paper records, which are not only inefficient but also error-prone. To solve this problem, a construction site management method based on BIM technology has emerged. Among them, BIM technology comprehensively models the construction site through digital means, realizing real-time monitoring and precise management of various data of the construction site.

[0003] However, existing BIM technologies often only focus on the establishment of building models and data collection, while ignoring the optimization of resource allocation. This leads to unreasonable and unbalanced resource allocation during the actual construction process, affecting the construction progress and cost-effectiveness. Moreover, there is a lack of scientific and effective prediction means. Specifically, although existing BIM technologies can collect a large amount of construction data, they often do not make full use of these data to predict the risk of schedule delays. In addition, during the construction process, due to the influence of various factors, costs often change. However, existing BIM technologies often lack a scientific cost adjustment mechanism, resulting in the lack of basis and rationality for cost adjustment.

[0004] Therefore, those skilled in the art have provided a construction site management method based on BIM technology to solve the problems raised in the above background technique. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a construction site management method based on BIM technology to achieve the method effects of optimizing resource allocation, accurately predicting schedule delays, and reasonably adjusting cost budgets.

[0006] To solve the above problems, the present invention provides the following technical solutions: A construction site management method based on BIM technology, including a method for the overall resource management and allocation of labor, materials, and equipment, characterized in that the method steps are as follows: Step I: Using BIM technology and a data collection and integration module, collect the basic data of the allocation ratio, actual utilization rate, and planned utilization rate of labor, materials, and equipment on the construction site, and integrate them onto the BIM platform; Step II: On the BIM platform, first use the data management and allocation module to sequentially calculate and output the resource allocation efficiency ZF, the schedule delay prediction value YY, and the cost adjustment factor CT; Step III. Next, based on the result of the cost adjustment factor CT, calculate the change in the adjusted cost amount; Step IV. Based on the result of the change in the adjusted amount and using the project management adjustment module, reallocate resources according to the emphasis on the allocation and utilization of labor, materials, and equipment; The data management and allocation module includes a resource allocation reflection unit, a predicted schedule delay unit, and a unit providing a basis for cost adjustment.

[0007] Further: The equipment used in the data collection and integration module includes sensors and monitoring equipment; The equipment used in the data management and allocation module includes computers and network equipment; The equipment used in the project management adjustment module includes project management software.

[0008] Further: The calculation formula of the resource allocation reflection unit is as follows: ; Where: ZF is the resource allocation efficiency; n is the number of resource types, and n = 3. The resources for construction site management include labor, materials, and equipment; F i is the allocation ratio of the i-th type of resource, and F i is specifically a decimal between 0 and 1; ZF is the total resource allocation ratio, and ZF = 1; ZL i is the actual utilization coefficient of the i-th type of resource, and ZL i is specifically a decimal between 0 and 1; The closer ZF is to 1, the higher the efficiency of resource allocation. On the contrary, the farther ZF is from 1, the lower the efficiency of resource allocation.

[0009] Further: According to the emphasis on the expected allocation of labor, materials, and equipment in construction site management, set the human resource allocation ratio as a, the material resource allocation ratio as b, and the equipment resource allocation ratio as c, that is, F i = a, F i = b, F i = c; And a + b + c = 1 = ZF; According to the emphasis on the actual utilization of labor, materials, and equipment in construction site management, set the actual human resource utilization coefficient as a1, the actual material resource utilization coefficient as b1, and the actual equipment resource utilization coefficient as c1, that is, ZL i = a1, ZL i = b1, ZL i= c1; And a1 + b1 + c1 = 1.

[0010] Furthermore: The calculation formula of the predicted schedule delay unit is as follows: ; Where: YY is the predicted value of schedule delay; ZL key is the actual utilization rate of key resources, and according to the emphasis on actual utilization in construction site management, the utilization rate of the emphasized resources among manpower, materials, and equipment is introduced for calculation; ZL ’ key is the planned utilization rate of key resources, and the expected key resources need to be correspondingly referenced to the management resources of actual utilization; F key is the allocation ratio of key resources; T is the estimated duration, and T reflects the duration of project delay; ZL key,max is the maximum utilization rate of key resources; represents the basic value of schedule delay caused by the current resource allocation efficiency ZF and the utilization rate of key resources; represents the adjustment amount related to the difference between the key resource allocation ratio and the actual utilization rate; If the value of YY is high, it indicates that the risk of schedule delay caused by the current resource allocation efficiency ZF and the utilization rate of key resources is high. On the contrary, if the value of YY is low, it indicates that the risk of schedule delay is low.

[0011] Furthermore: The calculation formula of the unit for providing cost adjustment basis is as follows: ; Where: CT is the cost adjustment factor; CY is the current cost budget; TC is the cost increase amount, and TC reflects the cost amount increased due to daily delay; X is the adjustment coefficient, and X reflects the adjustment ratio of key resources related to cost adjustment. A positive number indicates an increase, and a negative number indicates a decrease; Comprehensively calculate the total increased cost due to schedule delay and resource adjustment.

[0012] Furthermore: The adjustment coefficient X is set according to the emphasis on actual utilization in construction site management and the adjustment difference between the current and the previous stage, specifically as follows: If the emphasis is on manpower, then X = a1 - a prev ; If focusing on materials, then X = b1 - b prev ; If focusing on equipment, then X = c1 - c prev ; where, a prev is the actual utilization coefficient of human resources in the previous stage, b prev is the actual utilization coefficient of material resources in the previous stage, c prev is the actual utilization coefficient of equipment resources in the previous stage.

[0013] Furthermore: Based on the cost adjustment factor CT, the specific analysis and management are as follows: When CT = 1, it indicates the situation without cost adjustment; When CT > 1, it indicates that cost needs to be increased; When CT < 1, it indicates that cost needs to be reduced.

[0014] Furthermore: The calculation formulas of the cost adjustment factor CT when cost needs to be increased and reduced are as follows: TJ = (CT - 1) × CY; where, TJ is the adjustment amount; Then, according to the ratios of the actual utilization coefficient a1 of human resources, the actual utilization coefficient b1 of material resources, and the actual utilization coefficient c1 of equipment resources, the adjustment amount TJ is managed by proportional allocation to adjust the resource allocation on the construction site.

[0015] The effects of the above solution are as follows: 1. Through the calculation reflecting the resource allocation unit of the present invention, the allocation ratio and actual utilization rate of each resource can be clearly understood, thereby identifying the problem of unreasonable resource allocation. On this basis, the resource allocation can also be optimized by using the algorithms in the project management software and the BIM platform to ensure the full utilization and balanced allocation of resources.

[0016] 2. The predicted schedule delay unit of the present invention uses the current resource allocation efficiency ZF and the utilization rate of key resources to predict the resulting schedule delay, and this prediction method is not only scientific and effective, but also can discover the risk of schedule delay in advance, providing strong support for timely adjustment during the construction process.

[0017] 3. The unit providing the cost adjustment basis of the present invention adjusts the future cost budget according to the schedule delay prediction and the current cost budget CY. This adjustment mechanism not only considers the impact of schedule delay on cost, but also considers the adjustment ratio of resources related to cost adjustment, and through the calculation of the cost adjustment factor CT, the adjusted cost budget can be obtained, providing a strong basis for cost control during the construction process.

[0018] In addition, this method also achieves a dynamic balance among resource allocation, schedule delay prediction, and cost adjustment through a cyclic influence mechanism. This balance not only improves the efficiency and accuracy of construction site management but also promotes the continuous optimization and innovation of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic flowchart of the method for the construction site management method based on BIM technology; Figure 2 It is a schematic diagram of the weight change of the construction site management resources in the present invention; Figure 3 It is a schematic diagram of the structure of the data management and allocation module in the present invention; Figure 4 It is a schematic diagram of management adjustment based on the cost adjustment factor CT in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely introduced in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Embodiment 1. Please refer to Figures 1-4 , a construction site management method based on BIM technology, including a method for the overall resource management and allocation of manpower, materials, and equipment. It is characterized in that the method steps are as follows: Step I: Using BIM technology and the data collection and integration module, collect the basic data of the allocation ratio, actual utilization rate, and planned utilization rate of manpower, materials, and equipment on the construction site, and integrate them onto the BIM platform; Step II: On the BIM platform, first use the data management and allocation module to sequentially calculate and output the resource allocation efficiency ZF, the schedule delay prediction value YY, and the cost adjustment factor CT; Step III: Secondly, based on the result of the cost adjustment factor CT, calculate the change in the amount after cost adjustment; Step IIII: Based on the result of the change in the adjusted amount, and using the project management adjustment module, reallocate resources according to the emphasis on the allocation and utilization of manpower, materials, and equipment; The data management and allocation module includes a resource allocation reflection unit, a schedule delay prediction unit, and a cost adjustment basis providing unit; The equipment used in the data collection and integration module includes sensors and monitoring equipment; The equipment used in the data management and allocation module includes computers and network equipment; The equipment used in the project management adjustment module includes project management software.

[0022] In summary, the construction site management method based on BIM technology realizes the comprehensive monitoring and optimization of construction site management through steps such as integrating data, calculating resource allocation efficiency, predicting schedule delays, adjusting cost budgets, and optimizing resource allocation plans. At the same time, this method also uses project management software, BIM platforms, sensors, and monitoring equipment tools and devices to improve the efficiency and accuracy of management. Moreover, the resource allocation reflection unit, schedule delay prediction unit, and cost adjustment basis providing unit in this embodiment are interrelated in terms of calculation purposes and jointly constitute a quantitative analysis framework for a construction site management method based on BIM technology. Through this framework, it is possible to more scientifically and accurately evaluate resource allocation efficiency, predict schedule delays, adjust cost budgets, thereby optimizing construction site management and improving the efficiency and success rate of project implementation.

[0023] Please refer to Figures 1-4 , the calculation formula of the resource allocation reflection unit is as follows: ; Where: ZF is the resource allocation efficiency; n is the number of resource types, and n = 3. The resources for construction site management include labor, materials, and equipment; F i is the allocation ratio of the i-th type of resource, and F i is specifically a decimal between 0 and 1; ZF is the total resource allocation ratio, and ZF = 1; ZL i is the actual utilization coefficient of the i-th type of resource, and ZL i is specifically a decimal between 0 and 1; The closer ZF is to 1, the higher the efficiency of resource allocation. Conversely, the farther ZF is from 1, the lower the efficiency of resource allocation; According to the emphasis on the expected allocation of labor, materials, and equipment in construction site management, set the human resource allocation ratio as a, the material resource allocation ratio as b, and the equipment resource allocation ratio as c, that is, F i = a, F i = b, F i = c; And a + b + c = 1 = ZF; According to the emphasis on the actual utilization of labor, materials, and equipment in construction site management, set the actual utilization coefficient of human resources as a1, the actual utilization coefficient of material resources as b1, and the actual utilization coefficient of equipment resources as c1, that is, ZL i = a1, ZL i = b1, ZL i = c1; And a1 + b1 + c1 = 1.

[0024] In this embodiment, first Calculate the weighted average of all resource allocation ratios and actual utilization rates to evaluate the overall efficiency of resource allocation. Among them, by multiplying the allocation ratio Fi of the i-th resource i by the actual utilization coefficient ZLi of the i-th resource i and summing and then dividing by the total resource allocation ratio ZF, a value between 0 and 1 can be obtained, which represents the overall efficiency of resource allocation. The closer this value is to 1, the closer the resource allocation is to the ideal state, that is, each resource is fully utilized and reasonably allocated; Calculate the difference degree between the resource allocation ratio and the actual utilization rate to evaluate the balance and accuracy of resource allocation. Among them, by calculating the sum of the squares of the difference between the allocation ratio Fi of the i-th resource i and the actual utilization coefficient ZLi of the i-th resource i a value representing the difference degree can be obtained. The smaller this value is, the more balanced and accurate the resource allocation is. Together with the previous weighted average, it jointly determines the final value of the resource allocation efficiency ZF. The smaller the difference degree, the closer the resource allocation efficiency ZF is to 1, indicating higher resource allocation efficiency; In this algorithm unit, through the calculation of the resource allocation efficiency ZF, the difference between the actual utilization rate and the planned utilization rate of various resources can be intuitively seen, so as to quickly identify which resources are unreasonably allocated or have low utilization rates, which helps to timely adjust the resource allocation plan and thus avoid waste and shortage of resources; Based on the calculation results of the resource allocation efficiency ZF, a more scientific resource allocation strategy can be formulated. Specifically, for resources with low utilization rates, it is possible to consider reducing the allocation amount and finding alternative resources, while for resources with high utilization rates, the allocation amount can be appropriately increased to meet the construction requirements. The optimization of this strategy helps to improve the resource utilization efficiency and reduce resource waste and cost expenditure; In addition, the resource allocation efficiency ZF provides a data-based decision support. By comparing the actual utilization rate with the planned utilization rate, the implementation of the resource allocation plan can be more accurately evaluated, and thus more scientific and accurate decisions can be made, which helps to improve the overall level and efficiency of construction site management.

[0025] Please refer to Figures 1-4 , the calculation formula of the predicted schedule delay unit is as follows: ; Where: YY is the predicted schedule delay value; ZL keyis the actual utilization rate of key resources. And according to the actual utilization focus in construction site management, the utilization rate of the focused resource among manpower, materials, and equipment is introduced for calculation; ZL ’ key is the planned utilization rate of key resources, and this expected key resource needs to be correspondingly referenced to the management resources of actual utilization; F key is the allocation ratio of key resources; T is the expected duration, and T reflects the duration of project delay; ZL key,max is the maximum utilization rate of key resources; represents the basic value of schedule delay caused by the current resource allocation efficiency ZF and the utilization rate of key resources; represents the adjustment amount related to the difference between the allocation ratio of key resources and the actual utilization rate; If the YY value is high, it indicates that the risk of schedule delay caused by the current resource allocation efficiency ZF and the utilization rate of key resources is large. On the contrary, if the YY value is low, it indicates that the risk of schedule delay is small.

[0026] This embodiment first predicts the resulting schedule delay based on the difference between the resource allocation efficiency ZF and the actual and planned utilization rates of key resources. Among them, the resource allocation efficiency ZF reflects the overall efficiency of resource allocation, and the difference between the actual and planned utilization rates of key resources directly affects the project schedule. By multiplying these two and considering the expected duration T of the current task or stage, the resulting schedule delay amount can be predicted, which reflects the impact of resource allocation efficiency and the utilization rate of key resources on the project schedule; In this algorithm unit, the predicted schedule delay unit can comprehensively consider multiple factors of the current resource allocation efficiency ZF and the utilization rate of key resources, and predict in advance the resulting schedule delay, which ensures sufficient time to take countermeasures, including adjusting the construction plan and increasing resource input, so as to avoid and mitigate the impact of schedule delay; Based on the prediction results of the predicted schedule delay unit, the execution situation of the construction plan can be more accurately evaluated and adjusted according to the actual situation. Specifically, for the processes and links that cause schedule delay, it is possible to consider increasing the input of human and material resources to ensure the smooth progress of the construction schedule. This optimization helps to improve construction efficiency and quality, and ensure the overall benefit of construction site management; The predicted schedule delay unit provides a forward-looking management means for managers, and by predicting the possible schedule delay, it is possible to more proactively respond to various challenges and problems during the construction process, thereby improving the predictability and effectiveness of management decisions.

[0027] Please refer to Figures 1-4 , the calculation formula for the cost adjustment basis unit is as follows: ; Where: CT is the cost adjustment factor; CY is the current cost budget; TC is the cost increase amount, and TC reflects the cost amount increased due to daily delay; X is the adjustment coefficient, and X reflects the adjustment ratio of key resources related to cost adjustment. A positive number indicates an increase, and a negative number indicates a decrease; Comprehensively calculate the total increased cost due to schedule delay and resource adjustment; The adjustment coefficient X is set according to the actual focus of construction site management and the adjustment difference between the current and the previous stage, as follows: If the focus is on manpower, then X = a1 - a prev ; If the focus is on materials, then X = b1 - b prev ; If the focus is on equipment, then X = c1 - c prev ; Where, a prev is the actual utilization coefficient of human resources in the previous stage, b prev is the actual utilization coefficient of material resources in the previous stage, and c prev is the actual utilization coefficient of equipment resources in the previous stage.

[0028] This embodiment first calculates the following parts: Calculate the cost increased due to schedule delay. By multiplying the schedule delay prediction value YY by the cost increase amount per unit of delay TC and taking the square, a value representing the cost increased due to schedule delay can be obtained. The larger this value, the higher the cost increased due to schedule delay. As the part considering the schedule delay cost in the cost adjustment factor CT formula, together with the part related to the current cost budget CY and the adjustment coefficient X, they jointly determine the final value of the cost adjustment factor CT; Calculate the adjustment cost of key resources related to cost adjustment. By multiplying the current cost budget CY by the adjustment coefficient X and taking the square, a value representing the cost increased / decreased due to resource adjustment can be obtained. The size of this value depends on the positive / negative and magnitude of the adjustment ratio, and further reflects the impact of key resource adjustment on the cost budget; In this algorithm unit, the unit for providing the basis for cost adjustment can comprehensively consider multiple factors of schedule delay prediction and the current cost budget CY, accurately calculate the adjusted cost budget, thereby accurately grasping the cost changes, and thus taking effective cost control measures; The unit for providing the basis for cost adjustment not only considers the impact of schedule delay on cost, but also considers the adjustment ratio of key resources related to cost adjustment. This helps to optimize resource allocation and improve resource utilization efficiency while controlling costs. Specifically, for resources with high utilization rate and low impact on cost, the allocation volume can be appropriately increased, and for resources with low utilization rate and high impact on cost, the allocation volume can be considered for reduction and alternative resources can be sought; The unit for providing the basis for cost adjustment provides a flexible cost control means. By comprehensively considering multiple factors and calculating the adjusted cost budget, it can more flexibly respond to various challenges and problems during the construction process, which helps to enhance the flexibility and effectiveness of management decisions, and thus ensure the overall benefit of construction site management.

[0029] Example 2, please refer to Figures 1-4 , and based on the cost adjustment factor CT, the specific analysis and management are as follows: When CT = 1, it indicates that there is no cost adjustment; When CT > 1, it indicates that the cost needs to be increased; When CT < 1, it indicates that the cost needs to be reduced.

[0030] Through the cyclic influence of the cost adjustment factor CT in this embodiment, the resource allocation plan can be continuously adjusted and optimized to ensure the full utilization and balanced allocation of resources. This helps to improve the resource allocation efficiency, reduce resource waste and cost expenditure. The cyclic influence of the cost adjustment factor CT makes management decisions more coordinated and consistent. In terms of cost control and resource allocation, multiple factors can be comprehensively considered to make more comprehensive and scientific decisions. Through the cyclic influence of the cost adjustment factor CT, the work in construction plan, cost control and resource allocation can also be continuously optimized, thereby enhancing the overall benefit of construction site management.

[0031] Please refer to Figures 1-4 , the calculation formulas for the cost adjustment factor CT when the cost needs to be increased and reduced are as follows: TJ=(CT - 1)×CY; Among them, TJ is the adjustment amount; Then, according to the ratios of the actual utilization coefficients a1 of human resources, b1 of material resources, and c1 of equipment resources, the adjustment amount TJ is managed by proportional allocation to adjust the allocation of construction site resources.

[0032] In this embodiment, by using the formula TJ = (CT - 1) × CY, the amount by which the total project cost needs to increase or decrease can be accurately calculated. This method avoids subjective judgment and vague estimation, providing strong data support for cost control. Moreover, the formula-based calculation simplifies the cost adjustment process, thus helping to make decisions more quickly. At the same time, it can automatically adapt to the needs of different projects, improving the flexibility and efficiency of cost control. In addition, the formula-based cost adjustment process is clear and easy to understand the reasons and results of cost changes, which helps to enhance the transparency and credibility of project management and increase the likelihood of project success. In addition, it is worth noting that setting priorities according to the proportions of labor, materials, and equipment in the total cost can ensure that key resources are given priority. This method helps to optimize resource allocation, improve resource utilization efficiency, and thus reduce project costs. Combining resource allocation closely with the project schedule and making resource adjustments according to priorities can ensure that the project schedule is not affected by resource shortages or surpluses, which helps to improve the overall project schedule and ensure that the project is completed on time. By giving priority to ensuring the supply of key resources, the risks faced by the project due to resource shortages can be reduced. At the same time, making resource adjustments according to priorities can also make the project more flexible and adaptable in the face of unexpected situations, thus enhancing the project's risk resistance ability. Reasonable resource allocation not only helps to reduce project costs but also promotes the sustainable development of the project. By optimizing resource allocation, resource waste and environmental pollution can be reduced, and the social and environmental benefits of the project can be improved. In summary, by establishing a calculation formula for cost adjustment and making resource allocation according to the important priorities of the proportions of labor, materials, and equipment, this method has significant beneficial effects in project management and cost control. It not only improves the accuracy and efficiency of cost control, but also optimizes resource allocation, enhances the project schedule and risk resistance ability, and promotes the sustainable development of the project.

[0033] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined by the claims.

Claims

1. A construction site management method based on BIM technology, including a method for total resource management and allocation covering manpower, materials, and equipment, characterized by: The method steps are as follows: Step I: Use BIM technology and data collection and integration modules to collect basic data on the allocation ratio, actual utilization rate, and planned utilization rate of manpower, materials, and equipment on the construction site, and integrate them into the BIM platform; Step II: On the BIM platform, first use the data management allocation module to calculate the output resource allocation efficiency ZF, the schedule delay prediction value YY, and the cost adjustment factor CT in sequence; Step III: Secondly, based on the result of the cost adjustment factor CT, calculate the change in the amount after cost adjustment; Step III: Based on the results of the adjusted amount changes and using the project management adjustment module, reallocate resources according to the focus of manpower, material, and equipment allocation and utilization; The data management allocation module includes a resource allocation reflection unit, a schedule delay prediction unit and a cost adjustment basis providing unit.

2. A construction site management method based on BIM technology according to claim 1, characterized in that: The equipment used in the data collection and integration module includes sensors and monitoring equipment; The equipment used by the data management and distribution module includes computers and network equipment; The equipment used by the project management adjustment module includes project management software.

3. A construction site management method based on BIM technology according to claim 1, characterized in that: The calculation formula reflecting the resource allocation unit is as follows: ； in: ZF is the efficiency of resource allocation; n is the number of resource types, and n=3. The resources managed at the construction site include manpower, materials, and equipment; F i is the allocation ratio of the i-th resource, and F i Specifically, it is a decimal between 0 and 1; ZF is the total resource allocation ratio, and ZF=1; ZL i is the actual utilization coefficient of the i-th resource, and ZL i Specifically, it is a decimal between 0 and 1; The closer ZF is to 1, the more efficient the resource allocation is. Conversely, the further ZF is from 1, the less efficient the resource allocation is.

4. A construction site management method based on BIM technology according to claim 3, characterized in that: The manpower, materials, and equipment are allocated according to the expected focus of construction site management, and the human resource allocation ratio is set to a, the material resource allocation ratio is set to b, and the equipment resource allocation ratio is set to c, that is, F i =a,F i =b,F i =c; And a+b+c=1=ZF; The manpower, materials, and equipment are set according to the actual utilization of the construction site management, and the actual utilization coefficient of human resources is set to a1, the actual utilization coefficient of material resources is set to b1, and the actual utilization coefficient of equipment resources is set to c1, that is, ZL i =a1,ZL i =b1,ZL i =c1; And a1+b1+c1=1.

5. A construction site management method based on BIM technology according to claim 4, characterized in that: The calculation formula for the predicted schedule delay unit is as follows: ； in: YY is the predicted value of schedule delay; ZL key The actual utilization rate of key resources is calculated based on the actual utilization of construction site management, and the utilization rate of key resources among manpower, materials and equipment is introduced into the calculation; ZL ’ key Plan utilization for key resources, and the expected key resources must be quoted against the actual utilized management resources; F key Allocate proportions for key resources; T is the estimated duration, and T reflects the length of time the project is delayed; ZL key,max To maximize the utilization of key resources; It indicates the basic value of schedule delay caused by the current resource allocation efficiency ZF and key resource utilization rate; Represents the adjustment amount related to the difference between the allocation ratio and actual utilization of key resources; If the YY value is high, it means that the current resource allocation efficiency ZF and key resource utilization rate will lead to a high risk of schedule delays. Conversely, if the YY value is low, it means that the risk of schedule delays is small.

6. A construction site management method based on BIM technology according to claim 5, characterized in that: The calculation formula for providing the cost adjustment basis unit is as follows: ； in: CT is the cost adjustment factor; CY is the current cost budget; TC is the cost increase, which reflects the cost increase caused by daily delay; X is the adjustment coefficient, which reflects the adjustment ratio of key resources related to cost adjustment. A positive number indicates an increase, while a negative number indicates a decrease. Comprehensively calculate the total cost increase due to schedule delays and resource adjustments.

7. A construction site management method based on BIM technology according to claim 6, characterized in that: The adjustment coefficient X is set according to the emphasis of actual utilization of construction site management and the difference between the current and previous stages of adjustment, as follows: If the emphasis is on manpower, then X=a1-a prev ; If the emphasis is on materials, then X=b1-b prev ; If the focus is on equipment, then X=c1-c prev ; Among them, a prev is the actual utilization coefficient of human resources in the previous stage, b prev is the actual utilization coefficient of material resources in the previous stage, c prev It is the actual utilization coefficient of equipment resources in the previous stage.

8. A construction site management method based on BIM technology according to claim 6, characterized in that: Based on the cost adjustment factor CT, the specific analysis and management are as follows: When CT=1, it means there is no cost adjustment; When CT>1, it means that the cost needs to be increased; When CT<1, it means that costs need to be reduced.

9. A construction site management method based on BIM technology according to claim 8, characterized in that: The calculation formula of the cost adjustment factor CT when the cost needs to be increased or decreased is as follows: TJ = (CT-1) × CY; Among them, TJ is the adjustment amount; Then, the adjustment amount TJ is proportionally distributed and managed according to the ratio of the actual utilization coefficient of human resources a1, the actual utilization coefficient of material resources b1, and the actual utilization coefficient of equipment resources c1 to adjust the allocation of construction site resources.

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