CN117391264B - Method, system and medium for calculating construction period quota based on BIM model - Google Patents
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Abstract
The invention discloses a method, a system and a medium for calculating a project ration based on a BIM model, wherein the method comprises the following steps: calculating the engineering quantity of each process according to the engineering quantity of each component obtained from BIM model data and combining the process and the mapping relation of the components; according to the calculated engineering quantity of each working procedure, combining a pre-constructed construction period quota management system to obtain the estimated duration time of each working procedure, and obtaining the preliminary construction period according to the estimated duration time of each working procedure; optimizing the preliminary construction period according to the relation between the front and back working procedures and the inserting rule of the front working procedure to obtain the optimized construction period; outputting the optimized construction period as a final construction period when the optimized construction period meets the preset construction period requirement. According to the invention, the construction period is calculated and optimized by combining the accurate data of the BIM model and the information of the component library and the pre-post relation and the interpenetration rule of the working procedure, so that the accurate and reliable rated calculation of the construction period is realized.
Description
Technical Field
The invention relates to construction period quota calculation in the field of building construction, in particular to a method, a system and a medium for calculating construction period quota based on a BIM model.
Background
BIM is a comprehensive digital modeling method that presents information of an entire building project by creating a three-dimensional, even four-dimensional (including time) model. This method includes not only the geometry of the building but also the building element details, scheduling, cost estimation and other key data. BIM enables project manager, designer and contractor to work cooperatively, share information in real time, improve accuracy of decision making, and reduce errors and repeated work in construction process.
However, in engineering management using BIM, calculation of the project rate remains a challenging task. The project rate refers to the time that is expected to be required to complete a particular building task, and depends on a number of factors, including the order of the process steps, availability of resources, method of construction, etc. Traditional project rate calculations are typically based on experience and rule estimation, lack of scientific basis, are susceptible to subjective factors, and may lead to inaccurate project schedules.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method, a system and a medium for calculating the construction period quota based on a BIM model, which are used for calculating and optimizing the construction period by combining the accurate data of the BIM model and the information of a component library and the pre-post relation and the interpenetration rules of working procedures so as to realize accurate and reliable construction period quota calculation.
According to an aspect of the present disclosure, there is provided a method for calculating a project ration based on a BIM model, including:
calculating the engineering quantity of each process according to the engineering quantity of each component obtained from BIM model data and combining the process and the mapping relation of the components;
according to the calculated engineering quantity of each working procedure, combining a pre-constructed construction period quota management system to obtain the estimated duration time of each working procedure, and obtaining the preliminary construction period according to the estimated duration time of each working procedure; the construction of the construction period quota management system further comprises the following steps: determining standard engineering quantity of each process based on the divided processes, and constructing different duration time of each process according to the standard engineering quantity of each process to form a construction period quota management system;
optimizing the preliminary construction period according to the relation between the front and back working procedures and the inserting rule of the front working procedure to obtain the optimized construction period;
outputting the optimized construction period as a final construction period when the optimized construction period meets the preset construction period requirement.
According to the technical scheme, the estimated preliminary construction period is obtained based on BIM model data and a period quota management system, the preliminary construction period is optimally adjusted by combining the front-back relation of the working procedures and the interpenetration rules to obtain the optimized construction period, and finally the optimized construction period is compared with the preset construction period requirement to obtain the construction period meeting the preset construction period requirement, so that accurate and reliable period quota calculation is realized. Compared with the existing mode of estimating the construction period quota based on experience and rules, the technical scheme can effectively avoid errors caused by artificial subjective factors, achieves construction period quota calculation through objective and scientific technical means, and is beneficial to making a more accurate construction period progress plan.
According to the technical scheme, the basis is formulated by formulating a set of reusable construction period formulation, the deviation of the estimated construction period caused by artificial subjective factors is effectively avoided, the standard engineering quantity of each procedure is a constant quantity in most cases, different procedure duration can be constructed based on the standard engineering quantity, the actual constructed procedure duration is a time range, when the optimized construction period does not meet the preset requirement, the construction period can be estimated again by adjusting the procedure duration in the time range until the construction period meeting the preset requirement is obtained, the process can be automatically carried out through background data processing, subjective artificial experience judgment is not needed, and the accuracy of the construction period quota is greatly improved.
Optionally, the construction period quota management system at least comprises a working procedure standard duration, a working procedure minimum duration and a working procedure maximum duration corresponding to the standard engineering quantity.
As a further embodiment, the estimated duration of the process a=the production coefficient×the standard duration of the process a×the standard engineering amount of the process a in the BIM model/the engineering amount of the process a in the project ration management system.
The technical scheme fully utilizes the data of the BIM model, and organically combines the BIM model with the project period quota management to obtain reliable estimation of engineering quantity and duration. Specifically, by taking into consideration the difference between the process standard engineering quantity in the construction period quota management system and the process engineering quantity obtained from the BIM model, proportion correction is introduced in engineering quantity calculation, and meanwhile, the accuracy of estimation is further improved by combining the coefficients of actual production experience.
As a further technical solution, the method further includes: when the optimized construction period does not meet the preset construction period requirement, the working procedure duration time in a period quota management system is adjusted, the estimated duration time of each working procedure is recalculated, and then preliminary construction period calculation and optimization are sequentially carried out until the final construction period meeting the preset construction period requirement is obtained.
According to the technical scheme, the working procedure duration time is adjusted in a mode that the working procedure duration time set in the working procedure quota management system is adjustable within a certain range, when the calculated working procedure is not in accordance with the preset requirement, the working procedure duration time after adjustment is used for carrying out working procedure estimation and optimization again until the construction working procedure meeting the preset requirement is obtained, and therefore reliable working procedure quota calculation is achieved in a scientific and reasonable calculation mode.
As a further technical solution, the method further includes: acquiring the actual construction period of each working procedure in actual construction, and determining the change trend of the actual construction period of each working procedure and the relation between the change trend and the environment according to the data distribution of the actual construction period; and optimizing a construction period quota management system according to the change trend and the relation between the change trend and the environment.
According to the technical scheme, relevant information of actual construction period change caused by various uncertain factors during actual construction is fed back to a construction period quota management system, possible change trend of actual construction period of each procedure is analyzed according to the fed-back information, and setting of duration of each procedure in the construction period quota management system is optimized based on analysis results, closed-loop feedback of setting of duration of each procedure is achieved, so that the set duration of each procedure is closer to actual working conditions, and influence of uncertain factors in actual construction is better dealt with.
As a further technical solution, optimizing the preliminary construction period according to the pre-process and post-process relation and the pre-process interleaving rule, further includes:
judging whether a pre-working procedure exists in the current working procedure, if so, calculating the construction period of a working line where the current working procedure exists; if the working line does not exist, setting a new working line, and taking the duration time of the current working procedure as the construction period of the new working line;
judging whether the current working procedure has a post working procedure, if so, taking the post working procedure as a new current working procedure, repeating the pre working procedure judging process, and if not, taking the working period of the working line calculated in the pre working procedure judging as the construction period of the current working line.
According to the technical scheme, by judging the front-back relation of the working procedures, a new working line is opened for the working procedures without the front working procedures, so that parallel construction of a plurality of working lines is realized; meanwhile, the post-process of the same line is subjected to process penetration (namely, the post-process is used as a new pre-process to judge whether the post-process can form a new working line), the whole construction period is shortened through penetration construction, and finally, the purpose of quickly reducing the whole construction period and improving the construction efficiency is achieved through parallel and penetration construction of a plurality of lines.
As a further technical solution, when the current process has a pre-process, calculating a working period of a working line where the current process is located, further including:
when the duration of the pre-working procedure is longer than the sum of the duration of the current working procedure and the time of the current working procedure insertion, the working period of the working line where the current working procedure is located is the working period of the working line calculated by the pre-working procedure; on the contrary, the working period of the working line where the current working procedure is located=the working period of the working line calculated by the pre-working procedure-the pre-working procedure duration time, the current working procedure interlude time and the current working procedure duration time.
According to the technical scheme, a calculation mode for determining the working line work period of the current working procedure is provided according to the relation between the duration of the pre-working procedure, the duration of the post-working procedure and the interpenetration time, so that the rated work period of each line can be conveniently and rapidly obtained.
Alternatively, according to the front-to-back relation between the processes, the penetration time of each process may be set in advance so that the rated period of each work line can be rapidly calculated.
As a further technical solution, after the construction periods of all the working lines are determined, the maximum construction period value in all the working lines is used as the optimized construction period.
According to the technical scheme, based on the optimized parallel construction result of the multiple lines, the maximum value in the multiple line work periods is used as the optimized construction period, and in the construction period, all the working lines can finish construction.
According to an aspect of the present disclosure, there is provided a system for calculating a project ration based on a BIM model, comprising:
the working procedure engineering quantity calculation module is used for calculating the working procedure engineering quantity according to the working procedure engineering quantity of each component obtained from BIM model data and combining the working procedure and the component mapping relation;
the preliminary construction period calculation module is used for obtaining the estimated duration time of each working procedure according to the calculated engineering quantity of each working procedure and a pre-constructed period quota management system, and obtaining the preliminary construction period according to the estimated duration time of each working procedure;
the construction period optimizing module is used for optimizing the preliminary construction period according to the front-back relation of the working procedures and the front working procedure inserting rule to obtain the optimized construction period;
the final construction period determining module is used for outputting the optimized construction period to be the final construction period when the optimized construction period meets the preset construction period requirement.
According to the technical scheme, based on accurate model data and component information which are available in the BIM, the engineering quantity of each working procedure required by the current construction is obtained through the working procedure engineering quantity calculation module, then the engineering quantities are mapped to a construction period quota management system through the preliminary construction period calculation module, the estimated duration time of each working procedure is obtained, the preliminary construction period of the whole construction project is further obtained, the preliminary construction period is optimized through the construction period optimization module, the optimized construction period is compared and determined through the final construction period determination module, the final construction period meeting the preset requirements is obtained, accurate construction period quota calculation is achieved, and the problem of unstable construction period caused by manual experience estimation is avoided.
According to an aspect of the present description, there is provided a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of calculating a project period quota based on a BIM model.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method, which is based on BIM model data and a construction period quota management system, obtains a predicted preliminary construction period, optimally adjusts the preliminary construction period by combining a front-to-back relation of working procedures and a penetration rule to obtain an optimized construction period, and finally compares the optimized construction period with a preset construction period requirement to obtain the construction period meeting the preset construction period requirement, thereby realizing accurate and reliable construction period quota calculation. Compared with the existing mode of estimating the construction period quota based on experience and rules, the method can effectively avoid errors caused by artificial subjective factors, achieves construction period quota calculation through objective and scientific technical means, and is beneficial to making a more accurate construction period progress plan.
The invention provides a system, which is based on accurate model data and component information which can be obtained in a BIM model, obtains the engineering quantity of each working procedure required by the current construction through a working procedure engineering quantity calculation module, maps the engineering quantity to a construction period quota management system through a preliminary construction period calculation module to obtain the estimated duration of each working procedure, further obtains the preliminary construction period of the whole construction project, optimizes the preliminary construction period through a construction period optimization module, compares and determines the optimized construction period through a final construction period determination module to obtain the final construction period which meets the preset requirement, realizes accurate construction period quota calculation, and avoids the unstable construction period caused by manual experience estimation.
Drawings
FIG. 1 is a flow chart of a method for calculating a project ration based on a BIM model according to an embodiment of the invention.
FIG. 2 is a schematic diagram showing the comparison of process duration at standard engineering level according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of preliminary construction period estimation according to an embodiment of the present invention.
FIG. 4 is a schematic view of construction period optimization according to an embodiment of the present invention.
Detailed Description
It should be noted that: aiming at the current situation that the project schedule is inaccurate due to the fact that the traditional project schedule calculation is estimated based on experience and rules and is easily influenced by artificial subjective factors, the invention provides a project schedule calculation method.
The working procedures related in the invention refer to working procedures in the construction flow of a building, such as laying a masonry involved in masonry construction, technical bottom crossing, bar planting drawing detection, inverted sill formwork erection, inverted sill concrete, bottom brick laying, precast concrete lintel and concrete matching, aerated block laying, bar setting tie erection, verticality checking and sill roof pressing formwork erection; and the plastering construction comprises the steps of putty primary pass, putty secondary pass, polishing, priming paint, finish primary pass, finish secondary pass, sporadic closing, hydroelectric installation, hole hanging, paint and the like. The process steps corresponding to different construction projects are different, and the front-to-back relation between the process steps is clear to a person skilled in the art.
The following detailed description of the present invention is made with reference to the accompanying drawings and specific embodiments, and it is to be understood that the specific features of the embodiments and the embodiments of the present invention are detailed description of the technical solutions of the present invention, and not limited to the technical solutions of the present invention, and that the embodiments and the technical features of the embodiments of the present invention may be combined with each other without conflict.
The term "and/or" is merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. The character "/", generally indicates that the front and rear associated objects are an or relationship.
Example 1
The embodiment provides a method for calculating the project period quota based on a BIM model, which is based on accurate data of a BIM model library and a component library, realizes accurate and reliable project period quota calculation and ensures the accuracy of an engineering progress plan.
As shown in fig. 1, the method includes:
and step 1, acquiring BIM model data and engineering quantities of all components. The process can be realized at a computer end, and the built BIM model and the component library are read through a port import or network download mode.
And 2, combining the process and the component mapping relation (WBS relation), and calculating the engineering quantity of each process.
After the construction project is determined, the individual steps required for the construction project are clear to those skilled in the art, and the component information corresponding to the steps is retrieved from the component library of the BIM model, and the engineering amount of each component is determined, so that the engineering amount of each step can be calculated.
And step 3, according to the calculated engineering quantity of each working procedure, combining a pre-constructed construction period quota management system to obtain the estimated duration of each working procedure, and obtaining the preliminary construction period according to the estimated duration of each working procedure.
Optionally, the construction of the construction period quota management system comprises: determining standard engineering quantity of each process based on the divided processes; and constructing different durations of each process according to the standard engineering quantity of each process to form a construction period quota management system. According to the embodiment, a set of reusable construction period establishment basis is established, so that estimated construction period deviation caused by artificial subjective factors is effectively avoided.
Specifically, the standard engineering quantity of each process is in most cases a constant quantity, based on which different process durations can be constructed, the actual constructed process duration being a time frame. For each working procedure, the working procedure duration with an adjustable setting range is provided, and when the final construction period does not meet the preset requirement, the working procedure duration can be adjusted until the calculated construction period meets the preset requirement.
Further, the adjustable range of each process duration is between a minimum duration and a maximum duration. Generally, an intermediate point between the minimum duration and the maximum duration is selected as a standard duration, the standard duration is used to perform the first construction period calculation, and if the calculated and optimized construction period does not meet the preset requirement, the construction period is adjusted to the minimum duration direction or the maximum duration direction based on the standard duration until the calculated construction period meets the preset requirement.
A project rate management system may be understood as a collection of different process durations formed based on standard engineering quantities of the process. As shown in fig. 2, which covers minimum duration, standard duration and maximum duration, a comprehensive set of quota management systems is established. In this way, it is ensured that each process has a defined time criterion, including both the shortest required time and the standard completion time in the general case, while also taking into account the longest completion time in the extreme case. Such a quota management method not only helps to plan and control the time schedule of an engineering project, but also can address various changes and challenges.
In this embodiment, based on BIM model data, the engineering quantities of each process are first obtained and mapped to a project period quota management system. In this process, a uniform standard duration is employed to obtain an estimated duration for each process step. Duration prediction is performed on all procedures in the BIM model data, so that a complete construction period can be obtained, as shown in fig. 3.
Wherein, the process standard engineering quantity in the construction period quota management system and the engineering quantity obtained from the BIM model can be different, and the process standard engineering quantity is adjusted by adopting a proportional evaluation method. In addition, according to practical production experience, proper coefficients can be introduced for evaluation so as to ensure that the estimation of the engineering quantity is relatively accurate, the formula is introduced as follows,
，
wherein the method comprises the steps ofFor the standard engineering quantity of a certain process in the project period quota management system, t is the standard duration required by the process,/for the process>For coefficients obtained from practical production experience +.>The engineering quantity of the process in the BIM model is represented by T, and the duration of the process is represented by T. The method fully utilizes the data of the BIM model and organically combines the BIM model with the project period quota management to obtain reliable estimation of engineering quantity and duration. By considering the difference, the proportion correction can be introduced in engineering quantity calculation, and meanwhile, the accuracy of estimation is further improved by combining the coefficients of actual production experience.
It should be noted that the number of the substrates,the value range of (2) is [0.5, 2 ]]The precondition is: setting a normal construction period quota in a construction period quota management system, and +.>The value of (2) reflects the volume of the project and the construction complexity,/->The larger the value of (c) is, the greater the overall construction difficulty of the project is, and the calculated construction period is relatively larger.
In practical application, based on a construction period quota management system, the duration t of each working procedure can be circularly calculated, the duration in the construction period quota management is a section, the standard duration is taken under the initial condition, and if the final construction period does not meet the construction period requirement, the duration can be adjusted in the section range to meet the construction period requirement.
And step 3, optimizing the preliminary construction period according to the pre-process and post-process relation and the pre-process interpenetration rule to obtain the optimized construction period.
And (3) obtaining a preliminary construction period through the process duration estimation in the step (2). As can be seen from fig. 3, there is a linear relationship between the working procedures, so the overall working period is equal to the sum of the working procedures. However, the simple calculation method has larger access to actual construction, and is not beneficial to improving the construction efficiency of projects.
To solve this problem, each process needs to be adjusted according to the actual situation. Specifically, it is necessary to determine the relationship between the steps and to attempt to implement a strategy such as parallel operation of a plurality of lines and process insertion, so as to reduce the overall construction period, as shown in fig. 4. By the adjustment modes, the whole construction period can be quickly reduced, and the construction efficiency is improved.
Specifically, the judging that the relation between the front and the rear working procedures exists in each working procedure comprises the following steps:
step 3.1, judging whether a pre-working procedure exists, if not, setting a new working line, wherein the current working line working period is the current working procedure duration t;
if the pre-working procedure exists, the working line working period where the current working procedure is located is T, wherein the calculating mode of T comprises the following steps: if the duration of the pre-working procedure is longer than the duration of the current working procedure and the alternate time, T is the working line work period calculated by the previous working procedures; otherwise, the current work strip work period is calculated by the pre-working procedure, namely the work strip work period-pre-working procedure duration time, the current working procedure interlude time and the current working procedure duration time.
Step 3.2, judging whether a post-working procedure exists, and if the post-working procedure does not exist, determining the current working strip working period T; otherwise, the step 3.1 is continued, and the duration of other working procedures and the construction period of the working line are continuously calculated.
After the construction periods of all the working lines are determined, the final construction period quota can be obtained, and according to the analysis of fig. 4, the maximum construction period value in all the working lines is taken as the whole construction period, namely, the value Max (T).
And step 4, judging whether the construction period meets the requirement of the construction period, and if so, judging the construction period obtained in the step 3 as the final construction period. Otherwise, the duration time of the process setting is adjusted in the range of the duration time interval in the process engineering quantity and the project period quota management of all known processes, and the project period is recalculated again so as to meet the requirement of the construction period.
In particular, adjustments may be attempted between the minimum duration, standard duration, and maximum duration of the process to meet the requirements of the construction period as much as possible. Through the measures, the requirements of a developer on the construction period can be better met, and the feasibility of the project is improved.
In one embodiment, the method further comprises step 5: acquiring the actual construction period of each working procedure in actual construction, and determining the change trend of the actual construction period of each working procedure and the relation between the change trend and the environment according to the data distribution of the actual construction period; and optimizing a construction period quota management system according to the change trend and the relation between the change trend and the environment.
In actual construction, the actual construction period of each process may deviate from a pre-calculated value by a certain amount due to the influence of various uncertain factors such as environmental conditions, air temperature changes, and the like. The presence of such deviations may lead to instability in the progress of the project and may even have an impact on the benefit of the overall project. Therefore, the in-depth analysis of the actual construction period data is helpful to better understand the generation of the deviations and the influence thereof, thereby providing a certain basis for the data optimization of the follow-up construction period index quota management.
Specifically, it is necessary to conduct intensive analysis and study of the distribution, trend of change, influence factors, and the like of these actual construction period data. Through the analysis, the possible change trend of the actual construction period of each process and the relation between the change trend and factors such as environment, air temperature and the like can be more accurately known. Then, the existing project index quota management system can be optimized and improved through the analysis results so as to better cope with the influence of the uncertain factors. In addition, such analysis also helps to improve the ability to predict and control the actual construction period of each process. Rules and trends in actual construction period data can be found by analysis, and then used to predict future construction period changes. Meanwhile, corresponding control measures can be formulated by utilizing the analysis results so as to better control the actual construction period of each process.
Example 2
The same inventive concept as in embodiment 1, the present invention provides a system for calculating a work period quota based on a BIM model, comprising:
the working procedure engineering quantity calculation module is used for calculating the working procedure engineering quantity according to the working procedure engineering quantity of each component obtained from BIM model data and combining the working procedure and the component mapping relation;
the preliminary construction period calculation module is used for obtaining the estimated duration time of each working procedure according to the calculated engineering quantity of each working procedure and a pre-constructed period quota management system, and obtaining the preliminary construction period according to the estimated duration time of each working procedure;
the construction period optimizing module is used for optimizing the preliminary construction period according to the front-back relation of the working procedures and the front working procedure inserting rule to obtain the optimized construction period;
the final construction period determining module is used for outputting the optimized construction period to be the final construction period when the optimized construction period meets the preset construction period requirement.
The implementation of the foregoing module may be implemented with reference to example 1, which is not described herein, and needs to be specific, and further includes a construction period quota management system construction module, configured to execute the following steps:
determining standard engineering quantity of each process based on the divided processes; and constructing different durations of each process according to the standard engineering quantity of each process to form a construction period quota management system.
Example 3
The present embodiment provides a computer storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the method of calculating a project period quota based on a BIM model, based on the same inventive concept as the other embodiments.
In summary, the invention provides a set of reusable construction period establishment basis through the construction period quota management system, thereby effectively avoiding deviation caused by subjective factors of personnel. According to the method, the BIM model is adopted to obtain the calculation mode of the estimated construction period, and the construction period is combined with the optimization adjustment, so that the construction period can be formulated more perfectly. The improvement is not only embodied in the accurate calculation of the construction period, but also can effectively cope with various complex situations, such as the change of factors of site environment, resource condition, project requirement and the like.
The invention can provide update basis for the rated management of the construction period index by combining the actual construction period feedback, thereby providing more accurate rated management of the construction period. The update basis can help management personnel to better know the progress condition of the project, discover and solve potential problems in time, and ensure that the project is finished on time and in quality. Meanwhile, the updating basis can also provide reference for quota management of enterprises, and help the enterprises to perfect management systems and improve efficiency.
In summary, the invention provides a relatively accurate basis for the estimation of engineering quantities by fully integrating BIM model and quota management, and careful correction process. This facilitates project planning and time management, ensures that projects can be efficiently performed on a planned basis, and better accommodates changes in actual conditions.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method of calculating a project rate based on a BIM model, comprising:
calculating the engineering quantity of each process according to the engineering quantity of each component obtained from BIM model data and combining the process and the mapping relation of the components;
according to the calculated engineering quantity of each working procedure, combining a pre-constructed construction period quota management system to obtain the estimated duration time of each working procedure, and obtaining the preliminary construction period according to the estimated duration time of each working procedure; the construction of the construction period quota management system further comprises the following steps: determining standard engineering quantity of each process based on the divided processes, and constructing different duration time of each process according to the standard engineering quantity of each process to form a construction period quota management system; wherein, the estimated duration of the process a=the production coefficient×the standard duration of the process a×the engineering quantity of the process a in the BIM model/the standard engineering quantity of the process a in the project period quota management system;
optimizing the preliminary construction period according to the relation between the front and back working procedures and the inserting rule of the front working procedure to obtain the optimized construction period; further comprises: judging whether a pre-working procedure exists in the current working procedure, if so, calculating the construction period of a working line where the current working procedure exists; if the working line does not exist, setting a new working line, and taking the duration time of the current working procedure as the construction period of the new working line; judging whether a post-process exists in the current process, if so, taking the post-process as a new current process, repeating the pre-process judging process, and if not, taking the working period of the working line calculated in the pre-process judging as the construction period of the current working line;
outputting the optimized construction period as a final construction period when the optimized construction period meets the preset construction period requirement.
2. The method of calculating a project ration based on a BIM model of claim 1, further comprising: when the optimized construction period does not meet the preset construction period requirement, the working procedure duration time in a period quota management system is adjusted, the estimated duration time of each working procedure is recalculated, and then preliminary construction period calculation and optimization are sequentially carried out until the final construction period meeting the preset construction period requirement is obtained.
3. The method of calculating a project ration based on a BIM model of claim 1, further comprising: acquiring the actual construction period of each working procedure in actual construction, and determining the change trend of the actual construction period of each working procedure and the relation between the change trend and the environment according to the data distribution of the actual construction period; and optimizing a construction period quota management system according to the change trend and the relation between the change trend and the environment.
4. The method for calculating a work period quota based on a BIM model according to claim 1, wherein when a pre-process exists in a current process, calculating a work period of a work line where the current process exists, further comprising:
when the duration of the pre-working procedure is longer than the sum of the duration of the current working procedure and the time of the current working procedure insertion, the working period of the working line where the current working procedure is located is the working period of the working line calculated by the pre-working procedure; on the contrary, the working period of the working line where the current working procedure is located=the working period of the working line calculated by the pre-working procedure-the pre-working procedure duration time, the current working procedure interlude time and the current working procedure duration time.
5. The method of claim 1, wherein after the construction period of all the work lines is determined, the maximum construction period value of all the work lines is used as the optimized construction period.
6. A system for calculating a project rate based on a BIM model, comprising:
the working procedure engineering quantity calculation module is used for calculating the working procedure engineering quantity according to the working procedure engineering quantity of each component obtained from BIM model data and combining the working procedure and the component mapping relation;
the preliminary construction period calculation module is used for obtaining the estimated duration time of each working procedure according to the calculated engineering quantity of each working procedure and a pre-constructed period quota management system, and obtaining the preliminary construction period according to the estimated duration time of each working procedure; wherein, the estimated duration of the process a=the production coefficient×the standard duration of the process a×the engineering quantity of the process a in the BIM model/the standard engineering quantity of the process a in the project period quota management system;
the construction period optimizing module is used for optimizing the preliminary construction period according to the front-back relation of the working procedures and the front working procedure inserting rule to obtain the optimized construction period; further comprises: judging whether a pre-working procedure exists in the current working procedure, if so, calculating the construction period of a working line where the current working procedure exists; if the working line does not exist, setting a new working line, and taking the duration time of the current working procedure as the construction period of the new working line; judging whether a post-process exists in the current process, if so, taking the post-process as a new current process, repeating the pre-process judging process, and if not, taking the working period of the working line calculated in the pre-process judging as the construction period of the current working line;
the final construction period determining module is used for outputting the optimized construction period to be the final construction period when the optimized construction period meets the preset construction period requirement.
7. A computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of calculating a project rating based on a BIM model as claimed in any of claims 1 to 5.
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