A project management method for elevator shaft formwork construction

Abstract

The present invention discloses a method for managing elevator shaft template construction projects, which specifically relates to the field of construction project management and is used to solve the problem of dynamic process adjustment. The method introduces dynamic process sorting into construction management, uses real-time monitoring data to obtain the status of the previous process, and constructs process dependency and flexibility indexes to quantify the dependency and flexibility between processes. Based on this, a multi-level hierarchical analysis method is used to calculate the process startup adaptation index and evaluate the feasibility of starting the subsequent process. For the subsequent process that cannot be started directly, it is decomposed into sub-steps, and the execution conditions of the sub-steps are evaluated using resource independence coefficients, time flexibility coefficients, etc., and the impact on subsequent sub-steps is analyzed to ensure that there will be no adverse effects on subsequent construction. Flexible construction under tight construction period or delay of the previous process is realized, process coordination and resource allocation are optimized, efficiency is improved, delays are reduced, and precise control and efficient management are achieved.

Description

Technical Field

[0001] The present invention relates to the field of construction project management, and more specifically, to a method for managing elevator shaft formwork construction projects. Background Art

[0002] In the construction of high-rise buildings, the construction of elevator shafts faces complex process coordination issues. Especially under tight construction schedules, the interaction between the previous process and the subsequent process is particularly critical. Current construction management methods often lack flexibility and cannot respond to on-site emergencies in real time, which makes it difficult to effectively grasp the dependencies between processes.

[0003] For example, some front-end processes such as foundation pouring or formwork installation may not be completed as planned due to weather factors, construction equipment failure or delayed arrival of materials. At this time, if the back-end processes such as elevator track installation and electrical wiring are blindly promoted, it may lead to construction quality problems and even affect the safety and effectiveness of subsequent processes. Delays in front-end processes will not only cause stagnation of back-end processes, but may also lead to waste of resources and increase in construction costs.

[0004] In addition, the interference between the previous and next processes is often difficult to quantify, and there is a lack of in-depth analysis of their multi-dimensional impacts. For example, if the status of the previous process is not evaluated in detail during the next process, a vicious cycle of quality risks or construction delays may occur. Therefore, current construction management lacks sufficient attention to the interaction between processes, which leads to the overall construction progress being hindered and safety risks being increased.

[0005] Therefore, it is urgent to solve how to timely evaluate the impact of the previous process and reasonably arrange the development of the subsequent process through an effective dynamic adjustment mechanism during the tight construction period. The complexity of this problem lies in the fact that the construction site environment changes rapidly, and any decision needs to take into account multiple factors to ensure a balance between construction safety and efficiency.

[0006] In order to solve the above problems, a technical solution is now provided. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a method for managing the construction project of an elevator shaft template. By introducing a dynamic process sorting mechanism in the construction project management, the state information of the previous process is obtained by using real-time monitoring data, and the dependency and flexibility between the previous and next processes are accurately quantified by constructing a complex calculation model of the process dependency index and the process flexibility index. Based on these quantitative indicators, the multi-level hierarchical analysis method is used to calculate the process startup adaptation index, and the feasibility of starting the subsequent process is scientifically evaluated. For the subsequent process that cannot be started directly, it is decomposed into multiple sub-steps, and the execution conditions of each sub-step are evaluated one by one using parameters such as resource independence coefficient and time flexibility coefficient, and the influence of the selected sub-step on the subsequent sub-step is comprehensively analyzed to ensure that the started sub-step will not have an adverse effect on the subsequent construction. Through refined data analysis and model calculation, the method realizes flexible construction arrangements under tight construction period or delay of the previous process, optimizes the coordination and resource allocation between processes, improves construction efficiency, reduces construction delays caused by process conflicts and resource waste, ensures construction quality and safety, and achieves accurate control and efficient management of construction projects to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] S1, obtain the construction progress data of the previous process.

[0010] S2, analyze the correlation between the construction requirements of the subsequent process and the previous process, and generate an impact assessment report.

[0011] S3. Calculate the feasibility of the start-up of the subsequent process due to the delay of the previous process based on the impact assessment report.

[0012] S4: If the downstream process can be started, the corresponding downstream process is started directly.

[0013] S5, if the downstream process cannot be started, the downstream process is decomposed into multiple sub-steps, the execution conditions of each sub-step are evaluated one by one, and the impact of the selected startable sub-step on other subsequent sub-steps is analyzed to determine whether to start the corresponding sub-step.

[0014] In a preferred embodiment, step S2 includes the following contents:

[0015] S2.1, list all processes and their corresponding construction conditions; the construction conditions of each process include the required materials, equipment, worker skills and environmental requirements, recorded as a set ,in Indicates Conditions of a process.

[0016] S2.2, select the first ranked process as the front process, and the rest of the processes are back processes; define the front process as , the subsequent process is a collection ,in is the number of subsequent processes.

[0017] S2.3, treat the conditions of each process as nodes and edges of graph theory, and build a relationship model between all processes; define graph ,in is a set of process nodes, is the edge set of the dependency relationship between processes.

[0018] S2.4, for the status of the previous process, if it cannot be started, that is, if any of the construction conditions cannot be met, then use the relational model Analyze the closest downstream process; set the distance metric Indicates the front-end process and the back-end process The degree of correlation between Indicates If the distance metric is less than or equal to the preset threshold, subsequent analysis is performed.

[0019] S2.5, compare the execution conditions of each downstream process one by one; define the execution conditions of the downstream process as a set Only when , that is, when all conditions of the downstream process are met, an impact assessment is performed; otherwise, it is marked as unexecutable.

[0020] S2.6, generate an impact assessment report for each downstream process.

[0021] In a preferred embodiment, step S3 includes the following contents:

[0022] S3.1, the impact assessment report includes resource information and flexibility information; resource information includes process dependency index, and flexibility information includes process flexibility index.

[0023] The process of obtaining and calculating the process dependency index:

[0024] Process Dependence Index The calculation formula is: .

[0025] in:

[0026] : The sequential dependence of the previous process on the subsequent process; the specific calculation is: ;in, A collection of resources required for the previous process. A collection of resources required for subsequent processes.

[0027] : The degree of resource sharing between the front process and the back process, calculated by the formula: ;in, Indicates the quantity of materials, equipment or tools shared between two processes. Represents all resources required for subsequent processes.

[0028] : The time dependence of the previous process on the subsequent process is calculated as: .

[0029] :The subsequent process affects other subsequent processes The linkage dependency of is calculated as: .

[0030] : Estimated start time of downstream process.

[0031] : Total construction period, which indicates the planned completion time of the entire construction project.

[0032] In a preferred embodiment, step S3 further includes the following contents:

[0033] The process of obtaining and calculating the process flexibility index:

[0034] Process flexibility index The calculation formula is: .

[0035] : Resource substitutability coefficient, which indicates whether the subsequent process can be completed by other alternative resources when resources are insufficient or materials arrive late. The calculation formula is: ;in, Represents a collection of available alternative resources. Represents the original resource set required for the subsequent process. Represents the total number of primitive resource collections.

[0036] : Time adjustability coefficient, calculated as: ;in, It is the buffer time for the subsequent process, indicating the amount of time that can be flexibly adjusted. is the total time of the entire construction plan, is the amplitude of the adjustable time period, function Reflects the impact of the adjusted time period on the overall construction period.

[0037] : Estimated completion time of subsequent processes.

[0038] : Process correlation coefficient, which indicates the degree of dependence of the subsequent process on other subsequent processes. The calculation formula is: .

[0039] In a preferred embodiment, step S3 further includes the following contents:

[0040] S3.2, the feasibility of process startup is divided into two levels. The first level is the overall goal, that is, whether to start the subsequent process, and the second level is the evaluation index, including the process dependency index and the process flexibility index.

[0041] According to the relative importance of process dependency and process flexibility, a pairwise comparison judgment matrix is ​​constructed; each element in the matrix Indicates The indicator is relative to The importance of each indicator; the matrix form is as follows: ;in, Indicates the relative importance of process dependency to process flexibility, and vice versa .

[0042] Judgment Matrix Perform eigenvalue decomposition to find the maximum eigenvalue of the matrix and its corresponding eigenvector , the eigenvector represents the relative influence weight of the two indicators, and after normalization, the contribution of process dependence and flexibility in the comprehensive evaluation is obtained.

[0043] Using the components of the eigenvector and The process startup adaptation index is constructed according to the relative weights of the process dependence index and the process flexibility index.

[0044] If the process startup adaptation index is greater than or equal to the startup threshold, it means that the subsequent process is feasible to start under the current conditions, and a startable signal is generated; conversely, if the process startup adaptation index is less than the startup threshold, it means that the subsequent process cannot be started, and a non-startable signal is generated.

[0045] In a preferred embodiment, step S5 includes the following contents:

[0046] S5.1, if a signal that the process cannot be started is obtained, the task structure of the subsequent process is extracted, and its work content, resource requirements and time requirements are analyzed; the subsequent process is decomposed into several sub-steps , each sub-step corresponds to an independent task unit.

[0047] S5.2, for each substep ,in Indicates the subsequent process After decomposition The number of sub-steps; calculation resource independence coefficient and time flexibility coefficient , the calculation method is as follows:

[0048] Resource independence coefficient: ;in, A collection of resources required by the sub-steps. A collection of resources for the remaining sub-steps. The number of resources required for the substep.

[0049] Time flexibility factor: ;in, Adjustable time buffers for sub-steps, is the estimated execution time of the substep.

[0050] S5.3, for each sub-step, calculate the process start adaptation index , the calculation process is as follows: ;in, is the weight coefficient obtained by the multi-level hierarchical analysis method; it is judged whether the process start adaptation index is greater than or equal to the corresponding threshold value, if so, it is considered that the sub-step has the start condition.

[0051] In a preferred embodiment, step S5 further includes the following contents:

[0052] S5.4, analyze the impact of the selected startable sub-step on other subsequent sub-steps; construct a sub-step dependency graph , where the node set Represents all sub-steps, edge sets Represents dependencies between sub-steps; for each startable sub-step, evaluates its dependencies on subsequent sub-steps The impact includes the following factors:

[0053] Calculate resource conflict coefficient : .

[0054] Calculate spatial conflict coefficient ,According to the physical location and space occupancy of the sub-steps at the construction site, the spatial overlap degree of the two sub-steps is calculated through the space occupancy model.

[0055] Calculate the process sequence conflict coefficient , according to the process flow chart, determine whether a sub-step must be completed before the subsequent sub-step. If there is a mandatory order, the process order conflict coefficient is equal to 1, otherwise it is 0.

[0056] S5.5, integrate various conflict coefficients to obtain the influence coefficients between sub-steps.

[0057] S5.6, if for all subsequent sub-steps, the influence coefficient between sub-steps is less than or equal to the influence threshold, then the influence of the sub-step on the subsequent sub-steps is considered to be within an acceptable range, and the sub-step is allowed to be started.

[0058] S5.7. Develop a sub-step startup plan for all sub-steps that meet the startup conditions and have controllable impact on subsequent sub-steps.

[0059] Technical effects and advantages of an elevator shaft formwork construction project management method of the present invention:

[0060] By introducing a dynamic process sequencing mechanism into construction project management, using real-time monitoring data to obtain the status information of the previous process, and by constructing a complex calculation model of process dependency index and process flexibility index, the dependency relationship and flexibility between the previous and next processes are accurately quantified. Based on these quantitative indicators, the multi-level hierarchical analysis method is used to calculate the process startup adaptation index, and the feasibility of starting the subsequent process is scientifically evaluated. For the subsequent process that cannot be started directly, it is decomposed into multiple sub-steps, and the execution conditions of each sub-step are evaluated one by one using parameters such as resource independence coefficient and time flexibility coefficient, and the impact of the selected sub-step on the subsequent sub-steps is comprehensively analyzed to ensure that the started sub-step will not have an adverse effect on the subsequent construction. Through refined data analysis and model calculation, this method realizes flexible construction arrangements under tight construction schedules or delays in previous processes, optimizes coordination and resource allocation between processes, improves construction efficiency, reduces construction delays caused by process conflicts and resource waste, ensures construction quality and safety, and achieves precise control and efficient management of construction projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a structural schematic diagram of an elevator shaft formwork construction project management method of the present invention;

[0062] Figure 2 This is a schematic diagram of step S4 of a method for managing elevator shaft formwork construction project of the present invention. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Example: Figure 1 The present invention provides an elevator shaft template construction project management method, comprising:

[0065] S1, obtain the construction progress data of the previous process;

[0066] S2, analyze the correlation between the construction requirements of the subsequent process and the previous process, and generate an impact assessment report;

[0067] S3, based on the impact assessment report, calculate the feasibility of the previous process delay on the start of the next process;

[0068] S4, if the downstream process can be started, directly start the corresponding downstream process;

[0069] S5, if the downstream process cannot be started, the downstream process is decomposed into multiple sub-steps, the execution conditions of each sub-step are evaluated one by one, and the impact of the selected startable sub-step on other subsequent sub-steps is analyzed to determine whether to start the sub-step.

[0070] Step S1 includes the following contents:

[0071] S1.1, collects construction progress data of the process in real time through sensors and IoT devices. This process includes setting up multiple location sensors to monitor the completion of construction nodes and generate real-time progress reports to reflect the actual completion percentage. For example, if the concrete pouring work is 70% completed, the system will automatically record and update this information.

[0072] S1.2, use barcode scanning technology to record the status of material supply. When materials are put into storage at the construction site, they are registered by scanning barcodes, and material inventory information is updated in real time, including material type, quantity and supplier information. For example, if the cement supply is 50 tons, the system will update the inventory record accordingly to ensure that the material usage can be checked at any time during the construction process.

[0073] S1.3, combined with the on-site monitoring system, automatically identifies the worker's operation information. Through the camera and image recognition technology, the worker's working time and operation behavior are monitored in real time, and the tasks completed by each worker in a specific time period are recorded. For example, if a worker completes the template installation within 1 hour, the system will record the worker's working time and the specific work completed.

[0074] S1.4, integrate the above data and clean and format the data through the data processing platform. This process includes eliminating redundant data, correcting erroneous records, and ensuring that all data are in a unified format for subsequent analysis. For example, if a process progress data generates an abnormal value due to a sensor failure, the system will automatically mark the data and eliminate it.

[0075] S1.5, upload the processed real-time status data to the central database for subsequent analysis and decision support. This step includes storing the cleaned and formatted data in a structured form in the database for the project management system to call, thereby providing a data basis for the dynamic adjustment of subsequent processes and resource allocation.

[0076] Step S2 includes the following contents:

[0077] S2.1, list all processes and their corresponding construction conditions. The construction conditions of each process include the required materials, equipment, worker skills and environmental requirements, which are recorded as a set ,in Indicates Conditions of a process.

[0078] S2.2, select the first ranked process as the front process, and the rest of the processes are back processes. Define the front process as , the subsequent process is a collection ,in is the number of subsequent processes.

[0079] S2.3, treat the conditions of each process as nodes and edges of graph theory, and build a relationship model between all processes. Define graph ,in is a set of process nodes, is the edge set of the dependency relationship between processes.

[0080] S2.4, for the status of the previous process, if it cannot be started, that is, if any of the construction conditions cannot be met, then use the relational model Analyze the closest downstream process. Set the distance metric Indicates the front-end process and the back-end process The degree of correlation between Indicates If the distance metric is less than or equal to the preset threshold, subsequent analysis is performed.

[0081] S2.5, compare the execution conditions of each downstream process one by one. Define the execution conditions of the downstream process as a set Only if (that is, all conditions of the subsequent processes are met), an impact assessment is performed; otherwise, it is marked as unexecutable.

[0082] S2.6, generate an impact assessment report for each downstream process.

[0083] Step S3 includes the following contents:

[0084] S3.1, the impact assessment report includes resource information and flexibility information; resource information includes process dependency index, and flexibility information includes process flexibility index.

[0085] The process of obtaining and calculating the process dependency index:

[0086] The process dependency index is used to quantify the dependency between the previous process and the subsequent process, reflecting factors such as the sequence, resource sharing and time correlation between processes. The index is composed of the following core parameters and is calculated based on specific construction data.

[0087] Process Dependence Index The calculation formula is: ;

[0088] in:

[0089] : The order dependence of the previous process on the subsequent process. The specific calculation is: ;

[0090] in, A collection of resources required for the previous process. It is the set of resources required by the subsequent process, indicating whether the two processes have an intersection in resources. The larger the intersection, the stronger the resource dependence. Indicates the total quantity of the upstream process resource collection.

[0091] : The degree of resource sharing between the previous process and the next process. It reflects the proportion of shared resources between two processes. The calculation formula is: ;

[0092] in, Indicates the quantity of materials, equipment or tools shared between two processes. Represents all resources required for subsequent processes.

[0093] : The time dependence of the previous process on the subsequent process. It is defined as the difference between the start time of the subsequent process and the completion time of the previous process, indicating the temporal correlation between the two processes, and is calculated as: ; It is used to reflect the time closeness between the previous process and the next process. The smaller the time difference, the stronger the dependence.

[0094] :The subsequent process affects other subsequent processes Considering the linkage effect between the downstream process and its subsequent processes, the calculation is: ;

[0095] It represents the intersection of resource sharing between the downstream process and other subsequent processes. The larger the resource intersection, the stronger the linkage dependency.

[0096] : The estimated start time of the downstream process, in hours or days. Used to balance the dependency index and ensure that the calculation results are related to the time schedule.

[0097] : Total construction period, which indicates the planned completion time of the entire construction project and is used to measure the overall dependency level of subsequent processes.

[0098] The process dependency index is used to quantify the dependency between the previous process and the subsequent process, reflecting the degree of interaction between the processes in terms of resource sharing, time correlation, and linkage effect. Through this index, the impact of the delay of the previous process on the start of the subsequent process can be accurately described. Specifically, the process dependency index comprehensively considers the intersection of resources, the degree of resource sharing, and the close connection in time between the previous and next processes. In addition, it also introduces the linkage effect between the subsequent process and its subsequent processes, and comprehensively reflects the complex dependency relationship between the processes. The calculation of this index combines multiple dimensions such as process conditions, resource requirements, and time arrangements. Through complex analysis of these factors, the degree of influence of the previous process on the start of the subsequent process is obtained, thereby providing a quantitative basis for dynamic adjustments during the construction process.

[0099] The process of obtaining and calculating the process flexibility index:

[0100] The process flexibility index is used to measure the adjustment and substitution capabilities of a process relative to other subsequent processes during the construction process, especially whether the subsequent processes can be flexibly carried out in the case of insufficient resources or delays in the previous processes. The index reflects the flexibility and adjustment space of the process during the construction process by comprehensively examining the resource substitution, time adjustability and process independence of the process.

[0101] Process flexibility index The calculation formula is: ;

[0102] : Resource substitutability coefficient, which indicates whether the subsequent process can be completed through other alternative resources when resources are insufficient or materials arrive late. The calculation formula of this coefficient is: ;

[0103] in, Represents a collection of available alternative resources. Represents the original resource set required for the subsequent process. It represents the total number of original resource sets. The stronger the substitutability, the higher the flexibility index.

[0104] : Time adjustability coefficient, which indicates the ability of the subsequent process to adjust the time according to the delay of the previous process or the on-site situation. The calculation formula is: ;

[0105] in, It is the buffer time for the subsequent process, indicating the amount of time that can be flexibly adjusted. is the total time of the entire construction plan, is the amplitude of the adjustable time period, function Reflects the impact of the adjusted time period on the overall construction period.

[0106] : The estimated completion time of the subsequent process, which is used to balance the calculation result of the process flexibility index, in hours or days. This parameter reflects the total duration of the process execution time. The longer the process is adjusted, the less flexible it is.

[0107] : Process correlation coefficient, which indicates the degree of dependence of the subsequent process on other subsequent processes. The calculation formula is: ;

[0108] This coefficient is used to measure the dependence of downstream processes on resource sharing and time linkage. The stronger the dependence, the lower the flexibility.

[0109] The process flexibility index is used to quantify the adjustment and substitution capabilities of a process relative to other processes during the construction process, especially in the case of insufficient resources, time delays or other process changes, to measure whether the process can be flexibly deployed. The index comprehensively evaluates the adaptability of the process in the face of uncertainty through factors such as resource substitutability, time adjustability and process relevance. The process flexibility index not only reflects the substitution capability of the process in the case of resource shortages, but also examines its adjustment space in time schedule and its linkage relationship with other processes. Through this index, the flexibility and adjustment space of the process can be quantitatively analyzed to help construction managers make decisions in a dynamic environment.

[0110] S3.2, the feasibility of process startup is divided into two levels. The first level is the overall goal (i.e., whether to start the downstream process), and the second level is the evaluation index, including the process dependency index and the process flexibility index.

[0111] According to the relative importance of process dependency and process flexibility, a pairwise comparison judgment matrix is ​​constructed. Each element in the matrix Indicates The indicator is relative to The importance of each indicator. The matrix form is as follows: ;

[0112] in, Indicates the relative importance of process dependency to process flexibility, and vice versa .

[0113] Judgment Matrix Perform eigenvalue decomposition to find the maximum eigenvalue of the matrix and its corresponding eigenvector , the eigenvector represents the relative influence weight of the two indicators, and after normalization, the contribution of process dependence and flexibility in the comprehensive evaluation is obtained.

[0114] Using the components of the eigenvector and The relative weights of the process dependency index and the process flexibility index are used to construct the process startup adaptation index. , for example, calculated by the following formula: ;

[0115] The process start adaptation index is used to indicate whether the subsequent process can be flexibly started in the current construction environment according to the dependency of the previous process and its own flexibility. The index comprehensively reflects the dependency between processes and the adaptability of the subsequent process in terms of resource substitution, time adjustment and process independence. The process start adaptation index can be used to quantitatively evaluate the feasibility of starting the subsequent process, especially when the previous process is delayed or resources are insufficient. The index reflects the adaptability of the process in a complex construction environment and provides a quantitative basis for construction decision-making.

[0116] If the process start adaptation index is greater than or equal to the start threshold, it means that the subsequent process is feasible to start under the current conditions, that is, the dependency of the previous process and the flexibility of the subsequent process meet the construction requirements, and the subsequent process can be carried out without affecting the overall progress and quality, then a startable signal is generated. On the contrary, if the process start adaptation index is less than the start threshold, it means that the subsequent process cannot be started. The reason may be that the previous process is delayed or the resources, time and other conditions of the subsequent process are insufficient, and the safe or effective construction standards cannot be met. Therefore, it is necessary to continue waiting or adjust the construction plan, and a non-startable signal is generated.

[0117] Step S4 includes the following contents:

[0118] S4.1, based on the calculation results of the process startup adaptation index, confirm that the subsequent process meets the startup conditions, if a startup signal is obtained.

[0119] S4.2, generate the start-up instructions for the subsequent processes, which include all process information, resource call path, equipment start-up sequence and personnel arrangement information, and are transmitted to the corresponding execution module through the construction scheduling system.

[0120] S4.3, real-time monitoring of the startup process, using data acquisition equipment to obtain the execution status of the subsequent processes, including progress feedback, resource consumption, and equipment operating status. The data changes of key nodes will be continuously monitored and compared with the preset standards to ensure that the subsequent processes are executed as planned. If an abnormality is detected during the startup process, an alarm will be automatically issued and the process will be suspended.

[0121] S4.4, start the execution recording system of the subsequent process to record the execution time, resource consumption and progress status of each sub-step, so as to facilitate subsequent process analysis and optimization and provide data support for subsequent processes.

[0122] Step S5 includes the following contents:

[0123] S5.1, if a signal that the process cannot be started is obtained, the task structure of the subsequent process is extracted and its work content, resource requirements and time requirements are analyzed. The subsequent process is decomposed into several sub-steps. ,Each sub-step corresponds to an independent task unit, with relatively independent resource and time requirements.,The decomposition process follows the principles of functional independence and,minimum dependency to ensure that the dependencies between sub-steps are minimized,,facilitating separate startup.

[0124] S5.2, for each substep ,in Indicates the subsequent process After decomposition The number of the sub-step, The value range is 1 to ; Calculation resource independence coefficient and time flexibility coefficient , the calculation method is as follows:

[0125] Resource independence coefficient: ;

[0126] in, A collection of resources required by the sub-steps. A collection of resources for the remaining sub-steps. is the number of resources required for the sub-step. The closer the resource independence coefficient value is to 1, the higher the resource independence is.

[0127] Time flexibility factor: ;

[0128] in, Adjustable time buffers for sub-steps, The estimated execution time of the substep. The higher the time flexibility coefficient value, the greater the time flexibility.

[0129] Select sub-steps with higher resource independence and time flexibility, and give priority to startability assessment.

[0130] S5.3, for each sub-step, calculate the process start adaptation index , using the same evaluation method as the main process, comprehensively considering the process dependency index and process flexibility index of the sub-step. The calculation process is as follows: ;

[0131] in, is the weight coefficient obtained by the multi-level hierarchical analysis method. It is judged whether the process start adaptation index is greater than or equal to the corresponding threshold. If so, it is considered that the sub-step has the start condition.

[0132] S5.4, analyze the impact of the selected startable sub-step on other subsequent sub-steps. Construct a sub-step dependency graph , where the node set Represents all sub-steps, edge sets Indicates the dependencies between sub-steps. For each startable sub-step, evaluate its dependencies on subsequent sub-steps. The impact includes the following factors:

[0133] Calculate resource conflict coefficient : ;

[0134] The higher the resource conflict coefficient value is, the more serious the conflict between the startable sub-step and the subsequent sub-step in resource usage is.

[0135] Calculate spatial conflict coefficient ,According to the physical location and space occupancy of the sub-steps at the construction site, the spatial overlap degree of the two sub-steps is calculated through the space occupancy model.

[0136] Calculate the process sequence conflict coefficient , according to the process flow chart, determine whether a sub-step must be completed before the subsequent sub-step. If there is a mandatory order, the process order conflict coefficient is equal to 1, otherwise it is 0.

[0137] S5.5, combine various conflict coefficients to obtain the influence coefficient between sub-steps : ;

[0138] in, ,β, is the balance coefficient, satisfying =1, used to adjust the impact ratio of each conflict factor.

[0139] S5.6, if for all subsequent sub-steps, the influence coefficient between sub-steps is less than or equal to the influence threshold, then the influence of the sub-step on the subsequent sub-steps is considered to be within an acceptable range, and the sub-step is allowed to be started. Otherwise, it is necessary to adjust the execution plan of the sub-step, or select other sub-steps for evaluation.

[0140] S5.7, for all sub-steps that meet the start conditions and have controllable impact on subsequent sub-steps, formulate a sub-step start plan. The start plan includes the sub-step name, start time, resource allocation, personnel arrangement and precautions, etc. Ensure that the started sub-step will not have an adverse impact on the execution of subsequent sub-steps, maximize the use of existing resources and time, and advance the construction progress.

[0141] S5.8, monitor the execution of the started sub-steps in real time, collect execution data, and update the construction progress and resource status. Based on the on-site conditions and data feedback, dynamically adjust the evaluation and start-up plan of the unstarted sub-steps to ensure the flexibility and continuity of the construction process.

[0142] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0143] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0144] It should be noted that, in this article, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0145] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for managing elevator shaft formwork construction projects, characterized in that: Includes steps: S1, obtain the construction progress data of the previous process; S2, analyze the correlation between the construction requirements of the subsequent process and the previous process, and generate an impact assessment report; S3, based on the impact assessment report, calculate the feasibility of the previous process delay on the start of the next process; S4, if the downstream process can be started, directly start the corresponding downstream process; S5, if the downstream process cannot be started, the downstream process is decomposed into multiple sub-steps, the execution conditions of each sub-step are evaluated one by one, and the influence of the selected startable sub-step on other subsequent sub-steps is analyzed to determine whether to start the corresponding sub-step; Step S2 includes the following contents: S2.1, list all processes and their corresponding construction conditions; the construction conditions of each process include the required materials, equipment, worker skills and environmental requirements, recorded as a set ,in Indicates The conditions of each process; S2.2, select the first ranked process as the front process, and the rest of the processes are back processes; define the front process as , the subsequent process is a collection ,in is the number of subsequent processes; S2.3, treat the conditions of each process as nodes and edges of graph theory, and build a relationship model between all processes; define graph ,in is a set of process nodes, is the edge set of dependencies between processes; S2.4, for the status of the previous process, if it cannot be started, that is, if any of the construction conditions cannot be met, then use the relational model Analyze the closest downstream process; set the distance metric Indicates the front-end process and the back-end process The degree of correlation between Indicates A subsequent process; if the distance metric is less than or equal to the preset threshold, subsequent analysis is performed; S2.5, compare the execution conditions of each downstream process one by one; define the execution conditions of the downstream process as a set Only when , that is, when all conditions of the downstream process are met, the impact assessment is performed; otherwise, it is marked as unexecutable; S2.6, generate an impact assessment report for each downstream process.

2. The elevator shaft formwork construction project management method according to claim 1, characterized in that: Step S3 includes the following contents: S3.1, the impact assessment report includes resource information and flexibility information; resource information includes process dependency index, and flexibility information includes process flexibility index; The process of obtaining and calculating the process dependency index: Process Dependence Index The calculation formula is: ; in: : The sequential dependence of the previous process on the subsequent process is calculated as follows: ;in, A collection of resources required for the previous process. A collection of resources required for subsequent processes; : The degree of resource sharing between the front process and the back process, calculated by the formula: ;in, Indicates the quantity of materials, equipment or tools shared between two processes. Represents all resources required for subsequent processes; : The time dependence of the previous process on the subsequent process is calculated as: ; :The subsequent process affects other subsequent processes The linkage dependency of is calculated as: ; : Estimated start time of downstream process.

3. An elevator shaft formwork construction project management method according to claim 2, characterized in that: Step S3 also includes the following contents: The process of obtaining and calculating the process flexibility index: Process flexibility index The calculation formula is: ; : Resource substitutability coefficient, which indicates whether the subsequent process can be completed by other alternative resources when resources are insufficient or materials arrive late. The calculation formula is: ;in, Represents a collection of available alternative resources. Represents the original resource set required for the subsequent process. Indicates the total number of primitive resource collections; : Time adjustability coefficient, calculated as: ;in, It is the buffer time for the subsequent process, indicating the amount of time that can be flexibly adjusted. is the total time of the entire construction plan, is the amplitude of the adjustable time period, function Reflect the impact of the adjusted time period on the overall construction period; : Estimated completion time of subsequent processes; : Process correlation coefficient, which indicates the degree of dependence of the subsequent process on other subsequent processes. The calculation formula is: .

4. The elevator shaft formwork construction project management method according to claim 3 is characterized by: Step S3 also includes the following contents: S3.2, the feasibility of process start-up is divided into two levels. The first level is the overall goal, that is, whether to start the downstream process, and the second level is the evaluation index, including the process dependency index and the process flexibility index; According to the relative importance of process dependency and process flexibility, a pairwise comparison judgment matrix is ​​constructed; each element in the matrix Indicates The indicator is relative to The importance of each indicator; the matrix form is as follows: ;in, Indicates the relative importance of process dependency to process flexibility, and vice versa ; Judgment Matrix Perform eigenvalue decomposition to find the maximum eigenvalue of the matrix and its corresponding eigenvector , the eigenvector represents the relative influence weight of the two indicators, and after normalization, the contribution of process dependence and flexibility in the comprehensive evaluation is obtained; Using the components of the eigenvector and The relative weights of the process dependency index and the process flexibility index are respectively used to construct the process startup adaptation index; If the process startup adaptation index is greater than or equal to the startup threshold, it means that the subsequent process is feasible to start under the current conditions, and a startable signal is generated; conversely, if the process startup adaptation index is less than the startup threshold, it means that the subsequent process cannot be started, and a non-startable signal is generated.

5. The elevator shaft formwork construction project management method according to claim 4 is characterized by: Step S5 includes the following contents: S5.1, if a signal that the process cannot be started is obtained, the task structure of the subsequent process is extracted, and its work content, resource requirements and time requirements are analyzed; the subsequent process is decomposed into several sub-steps , each sub-step corresponds to an independent task unit; S5.2, for each substep ,in Indicates the subsequent process After decomposition The number of each sub-step; Calculation resource independence coefficient and time flexibility coefficient , the calculation method is as follows: Resource independence coefficient: ;in, A collection of resources required by the sub-steps. A collection of resources for the remaining sub-steps. The number of resources required for the substep; Time flexibility factor: ;in, Adjustable time buffers for sub-steps, is the estimated execution time of the sub-step; S5.3, for each sub-step, calculate the process start adaptation index , the calculation process is as follows: ;in, is the weight coefficient obtained by the multi-level hierarchical analysis method; it is judged whether the process start adaptation index is greater than or equal to the corresponding threshold value, if so, it is considered that the sub-step has the start condition.

6. The elevator shaft formwork construction project management method according to claim 5, characterized in that: Step S5 also includes the following contents: S5.4, analyze the impact of the selected activatable sub-step on other subsequent sub-steps; construct a sub-step dependency graph , where the node set Represents all sub-steps, edge sets Represents dependencies between sub-steps; for each startable sub-step, evaluates its dependencies on subsequent sub-steps The impact includes the following factors: Calculate resource conflict coefficient : ; Calculate spatial conflict coefficient , According to the physical location and spatial occupancy of the sub-steps at the construction site, the spatial overlap degree of the two sub-steps is calculated through the spatial occupancy model; Calculate the process sequence conflict coefficient , according to the process flow chart, determine whether a sub-step must be completed before the subsequent sub-step. If there is a mandatory order, the process order conflict coefficient is equal to 1, otherwise it is 0; S5.5, combining various conflict coefficients to obtain the influence coefficients between sub-steps; S5.6, if for all subsequent sub-steps, the inter-sub-step influence coefficient is less than or equal to the influence threshold, then the influence of the sub-step on the subsequent sub-steps is considered to be within an acceptable range, and the sub-step is allowed to be started; S5.

7. Develop a sub-step startup plan for all sub-steps that meet the startup conditions and have controllable impact on subsequent sub-steps.

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