CN115187039A - Construction progress management method and system based on BIM - Google Patents
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Abstract
The invention discloses a construction progress management method and a system based on BIM, wherein the method comprises the following steps: building a BIM model of a project to be constructed; leading the BIM model and the construction progress plan into a BIM progress management platform to generate a BIM4D model; analyzing the progress optimization factors and determining an optimal progress plan; collecting actual progress information; in a BIM progress management platform, comparing a construction progress plan with actual progress information to obtain a progress deviation value, and judging the influence degree of the progress deviation according to a set total time difference and a set free time difference; and when the progress deviation influences the total construction period, performing an optimal progress adjusting scheme. The invention combines the BIM technology and the construction progress management, develops theoretical methods and application researches of progress planning, progress optimization and control based on the BIM technology, provides scientific theoretical analysis methods for engineering construction managers and decision-makers, and promotes the construction progress management to develop towards the direction of informatization and datamation.
Description
Technical Field
The invention relates to the technical field of construction, in particular to a construction progress management method and system based on BIM.
Background
The construction of highway traffic infrastructure plays a crucial role in national economic growth and social development of China. The highway project has the characteristics of long construction period, more participating parties, complex management flow, more process data and the like. The traditional management mode of the expressway causes the problems of low production efficiency, resource waste, frequent quality safety problems, low informatization degree and the like, and is mainly characterized by schedule delay, uncontrollable cost and the like. How to improve the management efficiency of the highway and reduce the resource waste in the production process by means of management innovation and informatization is a main research topic of highway construction in China.
The BIM technology is produced along with the reform demand of the construction industry, and aims to improve the production efficiency and the production value profit of the construction industry. In a modern project management system, progress control is a crucial content in project management, and directly influences social benefits and economic benefits of engineering projects. Project construction progress requires systematic, comprehensive, and digital management. At present, project schedule management in China is still in relatively extensive management, subjectivity is high, early-stage accurate planning and arrangement are lacked, the project schedule is easily out of control, and meanwhile, a large amount of project resources are wasted. How to scientifically and reasonably compile a construction progress plan and supervise in the execution process has strong guiding and controlling significance for the execution of projects. Under the strong support of national policies, the BIM technology and the construction progress control are combined, the theoretical method of progress optimization and progress control based on the BIM technology is researched, and progress visualization and data management are realized.
Disclosure of Invention
In order to overcome the defects of the existing management mode, the invention provides a construction progress management method and a system based on BIM, which combine BIM technology, algorithm and mathematical model, use a BIM4D progress management platform as a carrier, and use the BIM4D progress management platform to carry out progress optimization, progress tracking, deviation analysis, progress control and the like, thereby solving the practical problems of management chaos, uncontrollable progress, resource waste, rework and the like in the current traditional progress management.
The application provides a construction progress management method based on BIM, which comprises the following steps
S1: building a BIM model of a project to be constructed, wherein the project to be constructed comprises more than one work task;
s2: leading the BIM model and the construction progress plan of the project to be constructed into a BIM progress management platform, and associating the BIM model with the construction progress plan to generate a BIM4D model;
s3: analyzing progress optimization factors, constructing an optimization model, and outputting an optimal progress plan in the BIM progress management platform by using the optimization model, wherein the optimization factors comprise construction period, resources and cost, and the optimization model comprises a construction period-resource optimization model and a construction period-cost optimization model;
s4: acquiring daily actual progress information by utilizing an informatization means in the construction process according to the optimal progress plan;
s5: in the BIM progress management platform, comparing the construction progress plan with the actual progress information to obtain a progress deviation value, and judging the influence degree of the progress deviation according to the set total time difference and the set free time difference;
s6: and when the progress deviation influences the total construction period, outputting an optimal progress adjusting scheme under the condition of minimum compression cost according to the mathematical models of the cost of the reduction construction period and the compression time of each key work.
Further, the precision of the BIM model of the project to be constructed is LOD300.
Further, the construction progress plan comprises a WBS decomposition structure, work task logic relation determination, work task duration determination and progress plan establishment.
Further, the construction period-resource optimization model adjusts the start-stop time and the process sequence of non-key processes in the schedule plan under the condition of ensuring that the total construction period is not changed, so as to achieve the aim of balancing resource allocation investment as much as possible, and finally outputs the planned start time of each process under the condition of balancing resource investment. The main resources in the highway engineering construction are taken as an optimization object, if the variance value F of the input resources in unit time is minimum, the resource allocation is most balanced, wherein,
wherein T is the total construction period; i is the number of the construction process (i =1,2. ·..., n); rm is the average demand of resources during construction,
r (t) is the demand of the resource at the time t,
R i (t) is the resource demand at time t during the i process construction,
T E (i) The earliest starting time of the i process; t is a unit of L (i) Is the latest starting time of the step i; t is s (i) Is the actual starting time of the procedure i; t (i) is the duration of the step i; a process immediately after j is i, T E (i)≤T s (i)≤T L (i)。
Further, the construction period-cost optimization model is a schedule plan in the case that the construction installation project cost of the construction project is minimum, that is, a schedule plan in the case that the sum of the direct cost and the indirect cost is minimum, wherein,
MinC general assembly ＝Min(C Straight bar +C Workshop )，C General (1) The total cost is; c Straight bar In order to be able to charge for the direct fee,
α i in order to increase the direct cost of the i process,
i is the number of the construction process (i =1,2, … …, n); c ni Is the direct charge of the step i in the normal state; t is t ni The duration of the i process in a normal state; c si I, the cost of the shortest duration of the procedure, namely the ultimate direct cost; t is t si The shortest duration of the i process; t is t i Is the actual duration of the i process, n is the number of all processes; c Workshop In order to make the charges indirect,
beta is an indirect fee rate, namely the indirect fee required every day; t is the total construction period; t is R The contract construction period is defined; beta is a Q Reward for project completion one day in advance; beta is a H Punishment for one day of project delay completion; t is 2 The longest construction period allowed by the project; t is 1 The shortest construction period allowed by the project; t is t si ≤t i ≤t ni 。
Further, the step of collecting daily actual progress information by an informatization means comprises the step of obtaining the actual progress information from information related to project progress in quality inspection data, or the step of receiving the actual progress information fed back by APP recording actual progress through the BIM progress management platform.
Further, the construction progress plan and the actual progress information are combinedComparing, and obtaining a progress deviation value comprises: calculating six time parameters of each task process in the project to be constructed by a double-code time scale network diagram algorithm, wherein the time parameters comprise the earliest starting time ES i-j The earliest end time EF i-j Latest start time LS i-j Latest end time LF i-j Total time difference TF i-j And free time difference FF i-j Wherein i and j represent serial numbers of different construction processes; determining a key route and key work of the construction project according to the time parameter; and determining the progress deviation according to the key line and the time parameter of the key work.
Further, the optimal schedule adjustment scheme performs schedule adjustment in a manner of compressing the key work duration under the condition of not changing the key path, so as to obtain a schedule plan under the condition of minimum compression cost, namely the schedule plan
Wherein minC is the compression cost; c Straight bar For the direct cost of the project before the compression period,
C straight bar ' is a direct fee after the compression period,
x i the compression time of the key procedure i is x is more than or equal to 0 i ≤b i ，Δx i ≥T-T′；α i To increase the direct cost of the i process in proportion,
i is the number of the construction process (i =1,2, … …, n); c ni Is the direct charge of the step i in the normal state; t is t ni The duration of the i process in a normal state; c si I, the cost of the shortest duration of the procedure, namely the ultimate direct cost; t is t si In the step iA minimum duration; t is t i Is the actual duration of the i process; alpha is alpha i The rate of increase (increase rate) of the direct charge of step i; j is the number of key processes which are not yet constructed; b i The maximum value of the construction period compression of the key procedure i; beta is the indirect rate of the project, and the unit is Yuan/day.
The invention also provides a construction progress management system based on the BIM, which comprises the following steps:
the system comprises an engineering BIM model building module, a construction process module and a construction process module, wherein the engineering BIM model building module is used for building a BIM model of an engineering to be constructed, and the engineering to be constructed comprises more than one work task;
the BIM4D model establishing module is used for leading the BIM model and the construction progress plan of the project to be constructed into a BIM progress management platform and associating the BIM model with the construction progress plan to generate a BIM4D model;
the progress plan generating module is used for analyzing progress optimization factors, constructing an optimization model and outputting an optimal progress plan in the BIM progress management platform by using the optimization model, wherein the optimization factors comprise construction period, resources and cost, and the optimization model comprises a construction period-resource optimization model and a construction period-cost optimization model;
the actual progress acquisition module is used for acquiring daily actual progress information by utilizing an informatization means in the construction process according to the optimal progress plan;
the progress deviation determining module is used for comparing the construction progress plan with the actual progress information in the BIM progress management platform to obtain a progress deviation value and judging the influence degree of the progress deviation according to the set total time difference and the set free time difference;
and the progress adjusting module is used for outputting an optimal progress adjusting scheme under the condition of minimum compression cost when the progress deviation influences the total construction period according to the established mathematical model of the cost of the reduction construction period and the compression time of each key work.
The beneficial effects of the invention are:
the invention combines the progress management method with the BIM technology to construct the project construction progress management method based on the BIM; importing the three-dimensional model and the progress plan of the construction project into a BIM progress management platform, and forming a BIM4D model through ID association; inputting parameters such as construction sequence, engineering quantity, resource consumption, planning start time, planning end time and the like of each task, and optimizing a progress plan according to a construction period-resource optimization model and a construction period-cost optimization model to achieve the effects of saving resources and optimizing the construction period; actual progress information is acquired through an informatization means and is displayed in a visualized mode through a BIM (building information modeling) model, so that information is transmitted more timely and more visually; the BIM progress management platform automatically calculates the progress deviation, displays the influence degree of the deviation through BIM models with different colors, and timely informs all parties of checking and auditing so as to keep the project progress in a monitoring state all the time; and when the progress is delayed, outputting an optimal progress adjusting scheme according to a mathematical model of the compression cost and the compression time so as to ensure the timely execution of the progress plan. In conclusion, the method gives full play to the characteristics of BIM technology visualization, coordination, information completeness and the like, combines an algorithm and an optimization model, takes a BIM progress management platform as a carrier, provides a scientific theoretical analysis method for engineering construction managers and decision-makers in multiple management stages of progress optimization, progress tracking, deviation analysis, progress control and the like, realizes dynamic and digital control of construction progress, and promotes the construction progress management of the highway engineering to develop towards the direction of informatization and datamation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic flow diagram of a BIM-based construction progress management method according to one embodiment of the present application;
FIG. 2 is a schematic flow diagram illustrating BIM4D construction model creation according to one embodiment of the present application;
FIG. 3 is a functional design diagram of a BIM progress management platform system according to an embodiment of the application;
FIG. 4 is a schematic flow chart diagram illustrating BIM-based progress optimization according to one embodiment of the present application;
FIG. 5 is a schematic flow chart diagram illustrating a progress deviation analysis in accordance with one embodiment of the present application;
FIG. 6 is a schematic block diagram of a BIM-based construction progress management system according to one embodiment of the present application.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
Fig. 1 and 6 are a schematic flowchart of a BIM-based construction progress management method and a schematic block diagram of a construction progress management system 100 according to an embodiment of the present application, respectively.
The BIM-based construction progress management method and system can be used for any construction engineering, such as construction engineering of expressways, bridges, tunnels, stations, subway stations and the like.
S1: and establishing a BIM model of the project to be constructed, wherein the project to be constructed comprises more than one working task. S1 may be performed by an engineering BIM model building module in the schedule management system 100.
In some embodiments, the project to be constructed may be divided into more than one work task in sections. BIM modeling can be respectively carried out on the divided work tasks. The BIM model may be a three-dimensional model. And integrating the created BIM models of all the work tasks into a finished BIM model.
In some embodiments, WBS encoding may also be performed for each of the divided work tasks, one WBS encoding for each work task.
In some embodiments, the software used for modeling may include revit, civil3d, and the like.
In some embodiments, the BIM model accuracy created may be any accuracy value, e.g., LOD100, LOD200, LOD300, LOD350, etc. For the same construction project, the precision of the BIM model of each work task can be the same or different. In some embodiments, the accuracy of the created BIM model may vary according to the requirements of different work tasks.
S2: and importing the BIM model and the construction progress plan of the project to be constructed into a BIM progress management platform, and associating the BIM model with the construction progress plan to generate a BIM4D model. S2 may be accomplished by BIM4D model building module 120 in progress management system 100. For a description of the BIM progress management platform, reference may be made to fig. 3 and its related description, which are not repeated herein.
S3: analyzing progress optimization factors, constructing an optimization model, and outputting an optimal progress plan in the BIM progress management platform by using the optimization model, wherein the optimization factors comprise construction period, resources and cost, and the optimization model comprises a construction period-resource optimization model and a construction period-cost optimization model. The generated optimal schedule plan can be used for guiding the construction after. S3 may be accomplished by the schedule plan generation module 130 in the schedule management system 100. For a description of the BIM-based progress optimization, reference is made to fig. 4 and its related description, which are not repeated herein.
S4: and acquiring daily actual progress information by using an informatization means in the construction process according to the optimal progress plan. In some embodiments, the actual progress information may be dynamically presented through a three-dimensional model. S4 may be accomplished by the actual progress acquisition module 140 in the progress management system 100.
In some embodiments, collecting daily actual progress information using an informatization means includes obtaining the actual progress information from information related to project progress in quality control materials. When the quality inspection data of the last procedure are complete, the construction of the procedure is finished, and the corresponding BIM model is automatically displayed in a finished state.
In some embodiments, the actual progress information fed back by the APP recording the actual progress can be received through the BIM progress management platform, for example, the site construction manager records the actual progress through a mobile phone APP, and feeds back the actual progress information to the BIM4D progress management platform through the APP to obtain the actual progress information.
S5: in the BIM progress management platform, the construction progress plan is compared with the actual progress information to obtain a progress deviation value SV, and the influence degree of the progress deviation is judged according to the set total time difference and the set free time difference. S5 may be accomplished by the progress deviation determination module 150 in the progress management system 100. For a description of the progress deviation analysis, reference may be made to fig. 5 and its related description, which are not repeated herein.
In some embodiments, six time parameters for each task in the project to be constructed can be calculated by a double-code time scale network diagram algorithm, wherein the time parameters comprise the earliest starting time (ES) i-j ) Earliest end time (EF) i-j ) Latest start time (LS) i-j ) Latest end time (LF) i-j ) Total time difference (TF) i-j ) And free time difference (FF) i-j ) Wherein i and j represent serial numbers of different construction processes; determining a key route and key work of the construction project according to the time parameters; and determining the progress deviation according to the key line and the time parameter of the key work. For the description of progress optimization of BIM, refer to fig. 4 and its related description, which are not repeated herein.
S6: and when the progress deviation influences the total construction period, outputting an optimal progress adjusting scheme under the condition of minimum compression cost according to the mathematical models of the cost of the reduction construction period and the compression time of each key work. S6 may be accomplished by the progress adjustment module 160 in the progress management system 100.
In some embodiments, the optimal schedule adjustment scheme performs schedule adjustment in consideration of a manner of compressing the key work duration under the condition that the key path is not changed, so as to obtain a schedule plan under the condition that the compression cost is minimum, which may be specifically referred to as formula 3
Wherein minC is the compression cost; c Straight bar For the direct cost of the project before the compression period,
C straight bar ' is a direct fee after the compression period,
x i the compression time of the key procedure i is x is more than or equal to 0 i ≤b i ，Δx i ≥T-T′；α i To increase the direct cost of the i process in proportion,
i is the number of the construction process (i =1,2, … …, n); c ni Is the direct cost of the i process in the normal state; t is t ni The duration of the i process in a normal state; c si I, the cost of the shortest duration of the procedure, namely the ultimate direct cost; t is t si The shortest duration of the i process; t is t i Is the actual duration of the i process; alpha is alpha i The rate of increase (increase rate) of the direct charge of step i; j is the number of key processes which are not yet constructed; b i The maximum value of the construction period compression of the key procedure i; beta is the indirect rate of the project, and the unit is Yuan/day.
And judging the severity of the current progress condition through deviation analysis, if the progress adjustment is needed, calculating by using a progress adjustment model of the compression cost and the construction period, and outputting a corresponding adjustment scheme. And repeatedly repeating links such as progress tracking, deviation analysis and progress adjustment to guide the project to be completed according to the schedule.
Fig. 3 is a functional design diagram of a BIM progress management platform system according to an embodiment of the present application. As shown in fig. 3, the BIM progress management platform may include the following functions: the method comprises the steps of BIM model importing, progress planning importing, construction progress optimizing, 4D model integrating, construction simulating, progress tracking recording, progress deviation analyzing, progress adjusting suggestion, progress condition displaying, resource management, cost management and the like. The above functions can be realized at a Web end, wherein the progress tracking record and the progress condition display can also be realized through APP.
The construction schedule can be compiled according to the requirements of the construction period. In some embodiments, the construction progress plan may include WBS decomposition structures, work task logical relationship determination, work task duration determination, progress plan establishment, and the like.
In some embodiments, BIM4D model building module 120 may form the BIM4D model by associating the BIM model with the construction schedule of the project to be constructed according to the code (e.g., members of IDs of respective projects may be automatically associated with the schedule task according to association rules). The generated BIM4D model can lay a foundation for subsequent progress management. FIG. 2 is a schematic flow diagram illustrating BIM4D construction model creation according to one embodiment of the present application. With reference to fig. 2, civil3D and revit model files and construction progress plan project files can be all input into a BIM4D progress management platform, then members with the same ID are automatically associated with tasks by establishing rules, and if the two are completely associated, a time period can be selected for BIM4D construction simulation; if the two are not completely associated, the components and tasks which cannot be automatically associated individually can be associated manually.
FIG. 4 is a schematic flow chart diagram illustrating BIM-based progress optimization according to one embodiment of the present application. Referring to fig. 4, the initially established BIM4D construction model may be imported into the BIM progress management platform, and then a progress comprehensive optimization program may be invoked to comprehensively analyze optimization factors (including a construction period, resources, and costs) to determine whether the optimization is satisfied or not, and if the optimization is not satisfied, the progress comprehensive optimization program may be repeatedly invoked after the construction plan is adjusted until the optimum condition is satisfied. After the optimal conditions are met, simulating depth optimization through a BIM4D scheme, then checking and analyzing through a simulation result, further judging whether the requirements are met, and if so, generating an optimal construction progress plan; if not, adjusting the scheme, returning to the step of entering the BIM4D construction progress management platform, and then executing other steps shown in the step 4 until the requirements are met.
In some embodiments, the schedule-resource optimization model adjusts start-stop time and process sequence of non-critical processes in the schedule so as to achieve the purpose of balancing resource allocation investment as much as possible while ensuring that the total schedule is unchanged, and finally outputs the scheduled start time of each process under the condition of balanced resource investment. Taking main resources in the construction of highway engineering as an optimization object, if the variance value F of the input resources in unit time is minimum, the resource allocation is most balanced, and the concrete reference can be made to formula 1:
wherein F is a variance value of input resources in unit time; t is the total construction period; i is the number of the construction process (i =1,2. ·..., n); rm is the average demand of resources during construction,
r (t) is the demand of the resource at the moment t,
R i (t) is the resource demand at time t during the i process construction,
T E (i) The earliest starting time of the i process; t is a unit of L (i) Is the latest starting time of the step i; t is s (i) Is the actual starting time of the procedure i; t (i) is the duration of the step i; a process immediately after j is i, T E (i)≤T s (i)≤T L (i)。
In some embodiments, the schedule-cost optimization model is a schedule plan when the construction installation cost of the construction project is minimum, that is, a schedule plan when the sum of the direct cost and the indirect cost is minimum, which can be specifically referred to as formula 2:
MinC general assembly ＝Min(C Straight bar +C Workshop ) (formula 2)
Wherein, C General assembly The total cost is; c Straight bar In order to be able to charge for the direct fee,
α i to increase the direct cost of the i process in proportion,
i is the number of the construction process (i =1,2, … …, n); c ni Is the direct charge of the step i in the normal state; t is t ni The duration of the i process in a normal state; c si I, the cost of the shortest duration of the procedure, namely the ultimate direct cost; t is t si The shortest duration of the i process; t is t i Is the actual duration of the i process, n is the number of all processes; c Workshop In order to make the charges indirect,
beta is an indirect fee rate, namely the indirect fee required every day; t is the total construction period. T is R The contract construction period is defined; beta is a Q Rewards for project completion for one day in advance; beta is a H Punishment for delaying the completion of the project by one day; t is 2 The longest construction period allowed by the project; t is 1 The shortest construction period allowed by the project; t is t si ≤t i ≤t ni 。
FIG. 5 is a schematic flow diagram of a progress deviation analysis shown in accordance with one embodiment of the present application. Firstly, judging whether the progress is critical work, then judging the current progress situation according to the data of progress tracking and the data of free time difference and total time difference in the progress plan, and dividing the current progress situation into the following parts according to the severity of deviation: a high early warning state, a medium early warning state and a low early warning state. Specifically, referring to fig. 5, if a job is a critical line job, which indicates that the delay of the job will affect the subsequent jobs and the total duration, the job may be marked as a highly early warning state; if a certain work is not the work of a key line, judging whether the progress deviation SV of the work is greater than the total time difference, if so, indicating that the delay of the work will affect the subsequent work and the total construction period, and marking the work as a moderate early warning state (the specific influence days are the difference between the two); if the progress deviation SV of the work is not greater than the total time difference, it is indicated that the total construction period is not affected but subsequent work is affected after the work, at this time, whether the progress deviation SV of the work is greater than the free time difference of the work or not can be determined, if so, it is indicated that the progress deviation of the work affects the development of the work immediately after the work, the work can be marked as a low-degree early warning state, and a progress adjustment measure needs to be determined according to the actual condition of the subsequent work; if the progress deviation SV of the work is not greater than the free time difference of the work, the work can be marked as a low-degree early warning state, and adjustment is not needed.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (9)
1. A construction progress management method based on BIM is characterized by comprising the following steps:
s1: building a BIM model of a project to be constructed, wherein the project to be constructed comprises more than one work task;
s2: leading the BIM model and the construction progress plan of the project to be constructed into a BIM progress management platform, and associating the BIM model with the construction progress plan to generate a BIM4D model;
s3: analyzing progress optimization factors, constructing an optimization model, and outputting an optimal progress plan in the BIM progress management platform by using the optimization model, wherein the optimization factors comprise construction period, resources and cost, and the optimization model comprises a construction period-resource optimization model and a construction period-cost optimization model;
s4: acquiring daily actual progress information by utilizing an informatization means in the construction process according to the optimal progress plan;
s5: in the BIM progress management platform, comparing the construction progress plan with the actual progress information to obtain a progress deviation value, and judging the influence degree of the progress deviation according to the set total time difference and the set free time difference;
s6: and when the progress deviation influences the total construction period, outputting an optimal progress adjusting scheme under the condition of minimum compression cost according to the mathematical models of the cost of the reduction construction period and the compression time of each key work.
2. The BIM-based construction progress management method according to claim 1, wherein the precision of the BIM model of the project to be constructed is LOD300.
3. The BIM-based construction progress management method of claim 1, wherein the construction progress plan comprises WBS decomposition structure, work task logical relationship determination, work task duration determination, and establishment progress plan.
4. The BIM-based construction progress management method according to claim 1, wherein the construction period-resource optimization model is used for adjusting start-stop time and process sequence of non-critical processes in a progress plan under the condition that the total construction period is guaranteed to be unchanged so as to achieve the purpose of balancing resource allocation investment as much as possible, and finally outputting the planned start time of each process under the condition of balanced resource investment. The main resources in the highway engineering construction are taken as an optimization object, if the variance value F of the input resources in unit time is minimum, the resource allocation is most balanced, wherein,
wherein T is the total construction period; i is the number of the construction process (i =1,2. ·..., n); rm is the average demand of resources during construction,
r (t) is the demand of the resource at the moment t,
R i (t) is the resource demand at time t during the i process construction,
T E (i) Is the earliest starting time of the procedure i; t is L (i) Is the latest starting time of the step i; t is s (i) Is the actual start time of the i process; t (i) is the duration of the step i; j is a post-process of i, T E (i)≤T s (i)≤T L (i)。
5. The BIM-based construction progress management method according to claim 1, wherein the construction period-cost optimization model is a progress plan in a case where construction installation work cost of the construction work is minimum, that is, a progress plan in a case where a sum of direct cost and indirect cost is minimum, wherein,
MinC general assembly ＝Min(C Straight bar +C Workshop )，C General assembly The total cost is; c Straight bar In order to be able to charge for the direct fee,
α i in order to increase the direct cost of the i process,
i is the number of the construction process (i =1,2, … …, n); c ni Is the direct charge of the step i in the normal state; t is t ni The duration of the i process in a normal state; c si For the shortest holding time of the i processThe cost under time, i.e. the ultimate direct cost; t is t si The shortest duration of the i procedure; t is t i Is the actual duration of the i process, n is the number of all processes; c Workshop In order to have a direct fee for the vehicle,
beta is an indirect fee rate, namely the indirect fee required every day; t is the total construction period; t is R The contract construction period is defined; beta is a beta Q Rewards for project completion for one day in advance; beta is a H Punishment for one day of project delay completion; t is 2 The longest construction period allowed by the project; t is 1 The shortest construction period allowed by the project; t is t si ≤t i ≤t ni 。
6. The BIM-based construction progress management method according to claim 1, wherein the collecting daily actual progress information by an informatization means comprises obtaining the actual progress information from information related to project progress in quality inspection data, or receiving the actual progress information fed back by APP recording actual progress through the BIM progress management platform.
7. The BIM-based construction progress management method according to claim 1, wherein the comparing the construction progress plan with the actual progress information to obtain a progress deviation value comprises:
calculating six time parameters of each task process in the project to be constructed by a double-code time scale network diagram algorithm, wherein the time parameters comprise the earliest starting time ES i-j The earliest end time EF i-j Latest start time LS i-j Latest end time LF i-j Total time difference TF i-j And free time difference FF i-j Wherein i and j represent serial numbers of different construction processes;
determining a key route and key work of the construction project according to the time parameter;
and determining the progress deviation according to the key line and the time parameter of the key work.
8. The BIM-based construction progress management method according to claim 1, wherein the optimal progress adjustment scheme performs progress adjustment in a manner of considering compression key work duration under the condition that a key path is not changed, so as to obtain a progress plan under the condition that compression cost is minimum, namely, the progress plan under the condition that compression cost is minimum
Wherein minC is the compression cost; c Straight bar For the direct cost of the project before the compression period,
for the direct charge after the compression period,
x i the compression time of the key procedure i is x is more than or equal to 0 i ≤b i ，Δx i ≥T-T′；α i To increase the direct cost of the i process in proportion,
i is the number of the construction process (i =1,2, … …, n); c ni Is the direct charge of the step i in the normal state; t is t ni The duration of the i process in the normal state; c si I, the cost of the shortest duration of the procedure, namely the ultimate direct cost; t is t si The shortest duration of the i process; t is t i Is the actual duration of the i process; alpha (alpha) ("alpha") i Increasing the direct cost of the step i; j is the number of key processes which are not yet constructed; b i The maximum value of the construction period compression of the key procedure i; beta is the indirect rate of the project, and the unit is Yuan/day.
9. A construction progress management system based on BIM, comprising:
the system comprises an engineering BIM model building module, a construction information module and a construction information module, wherein the engineering BIM model building module is used for building a BIM model of an engineering to be constructed, and the engineering to be constructed comprises more than one work task;
the BIM4D model establishing module is used for leading the BIM model and the construction progress plan of the project to be constructed into a BIM progress management platform and associating the BIM model with the construction progress plan to generate a BIM4D model;
the progress plan generating module is used for analyzing progress optimization factors, constructing an optimization model and outputting an optimal progress plan in the BIM progress management platform by using the optimization model, wherein the optimization factors comprise construction period, resources and cost, and the optimization model comprises a construction period-resource optimization model and a construction period-cost optimization model;
the actual progress acquisition module is used for acquiring daily actual progress information by utilizing an informatization means in the construction process according to the optimal progress plan;
the progress deviation determining module is used for comparing the construction progress plan with the actual progress information in the BIM progress management platform to obtain a progress deviation value and judging the influence degree of the progress deviation according to the set total time difference and the set free time difference;
and the progress adjusting module is used for outputting an optimal progress adjusting scheme under the condition of minimum compression cost when the progress deviation influences the total construction period according to the established mathematical model of the cost of the reduction construction period and the compression time of each key work.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115907446A (en) * | 2022-12-24 | 2023-04-04 | 众芯汉创（北京）科技有限公司 | Intelligent management and control evaluation system for construction progress of infrastructure project |
| CN116308152A (en) * | 2023-02-28 | 2023-06-23 | 北京洛斯达科技发展有限公司 | BIM and laser point cloud data-based transmission line engineering progress assessment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115907446A (en) * | 2022-12-24 | 2023-04-04 | 众芯汉创（北京）科技有限公司 | Intelligent management and control evaluation system for construction progress of infrastructure project |
| CN115907446B (en) * | 2022-12-24 | 2023-10-03 | 众芯汉创（北京）科技有限公司 | Intelligent management and control evaluation system for construction progress of foundation engineering |
| CN116308152A (en) * | 2023-02-28 | 2023-06-23 | 北京洛斯达科技发展有限公司 | BIM and laser point cloud data-based transmission line engineering progress assessment method |
| CN116308152B (en) * | 2023-02-28 | 2024-01-26 | 广东电网有限责任公司 | BIM and laser point cloud data-based transmission line engineering progress assessment method |
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