CN116029037A - IFC-based assembly type construction engineering amount calculating method - Google Patents
IFC-based assembly type construction engineering amount calculating method Download PDFInfo
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Abstract
The invention discloses an IFC-based assembly type construction engineering quantity calculating method, which belongs to the technical field of construction engineering quantity measuring and comprises the following steps: s1: constructing an assembled building BIM model according to the design drawing; s2: judging whether the BIM model of the assembled building accords with standardization, if so, entering a step S3, otherwise, entering a step S4; s3: converting the BIM model of the assembled building into IFC data, and entering into step S5; s4: correcting the BIM model of the assembled building until the BIM model of the assembled building meets the standardization, and entering into step S5; s5: determining a construction member corresponding to the IFC data; s6: and calculating the engineering quantity of the fabricated building project. The method for calculating the assembled building engineering quantity solves the problems that the data formats of related calculation quantity cost models created by different software are not uniform and lack of flexibility, and meanwhile, the algorithm based on the IFC data file can ensure the safety of the data more.
Description
Technical Field
The invention belongs to the technical field of building engineering quantity measurement, and particularly relates to an IFC-based assembled building engineering quantity calculating method.
Background
In the building engineering and house construction industry, the engineering quantity of a building construction project is rapidly calculated, and different constructors at different stages calculate and control the project based on drawings and related data in the whole project process, and the steps of estimating, calculating, budgeting (project quantity of a list), changing, visa, progress money, settlement and the like can be roughly divided into the steps of calculating the engineering quantity. The above steps have been widely used for construction projects of conventional cast-in-place structures.
In recent years, along with the continuous coding of the national level of the development policy of the fabricated building industry, the supporting strength is continuously improved, and the fabricated building project has become one of the important development directions of the building industry. However, the project amount calculation of the fabricated building project is greatly influenced by factors such as design, assembly rate, construction and standardized components in the industry, a great amount of repetitive work content exists in the calculation process, the data format multisource used for calculation in the traditional cast-in-place calculation mode is not uniform, the flexibility is low, the design part of the source of the building project is considered, the fabricated building plays a key role in determining the cost of the fabricated building in the design stage, the design of the fabricated building needs to be integrated into factors of a property first party, design, construction and manufacturers, a more accurate and flexible measuring and calculating mode is needed for the project in the design early stage, but the existing project amount in the design stage has the problems of low efficiency in terms of complexity existing in manual calculation, multiple reciprocations of the calculation process, data universality, calculation data inverse checking and the like, meanwhile, the quality requirements on the design content which can change at any time for various different schemes and responses of the project in the traditional design are gradually improved, the related work of the project amount is needed, the related calculation personnel in the design stage is very weak, the related calculation personnel in the design stage often has a great deal with the requirements on the repeated project control cost, the project control and the complex work process is more complicated, and the control of the project cost is required to be more complicated, and the work process is more complicated.
Disclosure of Invention
In order to solve the problems, the invention provides an IFC-based assembly type construction engineering calculation method.
The technical scheme of the invention is as follows: the method for calculating the assembled building engineering quantity based on the IFC comprises the following steps:
s1: obtaining a design drawing of an assembled building project, and constructing an assembled building BIM model according to the design drawing;
s2: judging whether the BIM model of the assembled building accords with standardization, if so, entering a step S3, otherwise, entering a step S4;
s3: converting the BIM model of the assembled building conforming to the standardization into IFC data, and entering into step S5;
s4: correcting the BIM model of the assembled building until the BIM model of the assembled building meets the standardization, and entering into step S5;
s5: determining a construction member corresponding to the IFC data;
s6: and calculating the engineering quantity of the fabricated building project according to the construction components.
Further, in step S2, the specific method for determining whether the prefabricated building BIM model meets the standardization is as follows: in the BIM model of the assembled building, extracting a geometric entity of the BIM model of the assembled building, and carrying out grid division on the three-dimensional surface of the geometric entity to obtain a corresponding two-dimensional polygon, wherein if the two-dimensional polygon is continuous, the BIM model of the assembled building accords with standardization, otherwise, the BIM model of the assembled building does not accord with standardization.
Further, step S3 comprises the sub-steps of:
s31: obtaining a geometric entity object conforming to a standardized assembly building BIM model, and extracting entity constraint conditions of the geometric entity object;
s32: extracting entity attribute values of the geometric entity objects based on entity constraint conditions of the geometric entity objects;
s33: and generating IFC data according to the entity attribute values of the geometric entity objects.
Further, in step S31, the entity constraint condition of the geometric entity object includes entity attribute information and entity attribute names;
the entity attribute information specifically comprises: the attribute information of the geometric entity object conforming to the standardized assembly building BIM model is the same as the attribute information of the body;
the entity attribute name is specifically: the attribute names of the geometric entity objects conforming to the standardized building BIM model are the same as the attribute names of the ontology.
Further, in step S32, based on the attribute template file conforming to the standardized building BIM model, the entity attribute values of the geometric entity objects conforming to the entity constraint conditions are extracted.
Further, in step S4, the concrete method for correcting the building in Building (BIM) model includes: extracting the assembly type components according to the assembly sequence of the BIM model of the assembly type building, identifying the assembly type components with assembly defects, and removing and replacing the assembly type components with assembly defects until the BIM model of the assembly type building meets the standardization.
Further, in step S4, the specific method for identifying the fabricated component having the assembly defect is as follows: calculating a component correction coefficient of the assembled component and a preset assembled component, wherein if the component correction coefficient is smaller than 0.5, the assembled component belongs to the assembled component with the assembly defect, otherwise, the assembled component does not belong to the assembled component with the assembly defect.
Further, in step S4, the component correction coefficients of the fabricated component and the preset fabricated component
The calculation formula of (2) is as follows:
Further, step S6 comprises the sub-steps of:
s61: classifying the construction components, and calculating the engineering quantity and the size parameters of the construction components of the same type;
s62: in the same category, removing construction components larger than a set size parameter threshold value;
s63: the sum of the engineering amounts of the construction elements of the respective kinds is taken as the engineering amount of the fabricated building project.
The beneficial effects of the invention are as follows:
(1) The method for calculating the amount of the assembled building engineering converts the BIM model of the assembled building conforming to standardization into IFC data, solves the problems that the BIM model and the related amount of calculation cost model created by different software are not uniform in data format and lack flexibility, and meanwhile, the algorithm based on the IFC data file can ensure the safety of the data more;
(2) According to the method for calculating the assembled building engineering quantity, corresponding construction components are determined through IFC data, so that time required by engineering quantity calculation and construction cost calculation is greatly reduced, calculation workload is reduced, calculation accuracy is improved, the construction components are rapidly classified, working efficiency is improved, and feasibility of building projects is further guaranteed;
(3) The method for calculating the amount of the assembled building engineering can identify and remove assembled components with assembly defects, and execute corresponding calculation rules of the amount of the assembled building engineering to output related calculation results.
Drawings
FIG. 1 is a flow chart of a method of calculating an amount of prefabricated construction work.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an IFC-based method for calculating the amount of prefabricated construction work, comprising the steps of:
s1: obtaining a design drawing of an assembled building project, and constructing an assembled building BIM model according to the design drawing;
s2: judging whether the BIM model of the assembled building accords with standardization, if so, entering a step S3, otherwise, entering a step S4;
s3: converting the BIM model of the assembled building conforming to the standardization into IFC data, and entering into step S5;
s4: correcting the BIM model of the assembled building until the BIM model of the assembled building meets the standardization, and entering into step S5;
s5: determining a construction member corresponding to the IFC data;
s6: and calculating the engineering quantity of the fabricated building project according to the construction components.
In the embodiment of the invention, in step S2, the specific method for judging whether the building block modeling (BIM) model meets the standardization is as follows: in the BIM model of the assembled building, extracting a geometric entity of the BIM model of the assembled building, and carrying out grid division on the three-dimensional surface of the geometric entity to obtain a corresponding two-dimensional polygon, wherein if the two-dimensional polygon is continuous, the BIM model of the assembled building accords with standardization, otherwise, the BIM model of the assembled building does not accord with standardization.
In an embodiment of the present invention, step S3 comprises the sub-steps of:
s31: obtaining a geometric entity object conforming to a standardized assembly building BIM model, and extracting entity constraint conditions of the geometric entity object;
s32: extracting entity attribute values of the geometric entity objects based on entity constraint conditions of the geometric entity objects;
s33: and generating IFC data according to the entity attribute values of the geometric entity objects.
In the embodiment of the present invention, in step S31, the entity constraint condition of the geometric entity object includes entity attribute information and entity attribute names;
the entity attribute information specifically comprises: the attribute information of the geometric entity object conforming to the standardized assembly building BIM model is the same as the attribute information of the body;
the entity attribute name is specifically: the attribute names of the geometric entity objects conforming to the standardized building BIM model are the same as the attribute names of the ontology.
In the embodiment of the present invention, in step S32, based on the attribute template file conforming to the standardized building BIM model, the entity attribute values of the geometric entity objects conforming to the entity constraint conditions are extracted.
In the embodiment of the invention, in step S4, the concrete method for correcting the building block model (BIM) of the fabricated building is as follows: extracting the assembly type components according to the assembly sequence of the BIM model of the assembly type building, identifying the assembly type components with assembly defects, and removing and replacing the assembly type components with assembly defects until the BIM model of the assembly type building meets the standardization.
In the embodiment of the present invention, in step S4, a specific method for identifying the fabricated component having the assembly defect is as follows: calculating a component correction coefficient of the assembled component and a preset assembled component, wherein if the component correction coefficient is smaller than 0.5, the assembled component belongs to the assembled component with the assembly defect, otherwise, the assembled component does not belong to the assembled component with the assembly defect.
In the embodiment of the present invention, in step S4, the component correction coefficients of the fabricated component and the preset fabricated component
The calculation formula of (2) is as follows:
In an embodiment of the present invention, step S6 includes the sub-steps of:
s61: classifying the construction components, and calculating the engineering quantity and the size parameters of the construction components of the same type;
s62: in the same category, removing construction components larger than a set size parameter threshold value;
s63: the sum of the engineering amounts of the construction elements of the respective kinds is taken as the engineering amount of the fabricated building project.
Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.
Claims (9)
1. The method for calculating the assembled building engineering based on the IFC is characterized by comprising the following steps of:
s1: obtaining a design drawing of an assembled building project, and constructing an assembled building BIM model according to the design drawing;
s2: judging whether the BIM model of the assembled building accords with standardization, if so, entering a step S3, otherwise, entering a step S4;
s3: converting the BIM model of the assembled building conforming to the standardization into IFC data, and entering into step S5;
s4: correcting the BIM model of the assembled building until the BIM model of the assembled building meets the standardization, and entering into step S5;
s5: determining a construction member corresponding to the IFC data;
s6: and calculating the engineering quantity of the fabricated building project according to the construction components.
2. The IFC-based prefabricated building engineering calculation method according to claim 1, wherein in the step S2, the specific method for determining whether the prefabricated building BIM model meets the standardization is as follows: in the BIM model of the assembled building, extracting a geometric entity of the BIM model of the assembled building, and carrying out grid division on the three-dimensional surface of the geometric entity to obtain a corresponding two-dimensional polygon, wherein if the two-dimensional polygon is continuous, the BIM model of the assembled building accords with standardization, otherwise, the BIM model of the assembled building does not accord with standardization.
3. The IFC-based fabricated building engineering calculation method according to claim 1, wherein the step S3 includes the sub-steps of:
s31: obtaining a geometric entity object conforming to a standardized assembly building BIM model, and extracting entity constraint conditions of the geometric entity object;
s32: extracting entity attribute values of the geometric entity objects based on entity constraint conditions of the geometric entity objects;
s33: and generating IFC data according to the entity attribute values of the geometric entity objects.
4. The IFC-based fabricated building engineering calculation method according to claim 3, wherein in the step S31, the entity constraint condition of the geometric entity object includes entity attribute information and entity attribute name;
the entity attribute information specifically comprises: the attribute information of the geometric entity object conforming to the standardized assembly building BIM model is the same as the attribute information of the body;
the entity attribute name is specifically: the attribute names of the geometric entity objects conforming to the standardized building BIM model are the same as the attribute names of the ontology.
5. The IFC-based fabricated building engineering calculation method according to claim 3, wherein in the step S32, the entity attribute values of the geometric entity objects conforming to the entity constraint condition are extracted based on the attribute template file conforming to the standardized fabricated building BIM model.
6. The IFC-based prefabricated building engineering calculation method according to claim 1, wherein in the step S4, the concrete method for correcting the prefabricated building BIM model is as follows: extracting the assembly type components according to the assembly sequence of the BIM model of the assembly type building, identifying the assembly type components with assembly defects, and removing and replacing the assembly type components with assembly defects until the BIM model of the assembly type building meets the standardization.
7. The IFC-based fabricated building engineering calculation method according to claim 6, wherein in the step S4, the specific method for identifying the fabricated component having the assembly defect is as follows: calculating a component correction coefficient of the assembled component and a preset assembled component, wherein if the component correction coefficient is smaller than 0.5, the assembled component belongs to the assembled component with the assembly defect, otherwise, the assembled component does not belong to the assembled component with the assembly defect.
8. The IFC-based fabricated building engineering calculation method according to claim 6, wherein in the step S4, the component correction coefficients of the fabricated component and the preset fabricated component are calculated
The calculation formula of (2) is as follows: />
9. The IFC-based fabricated building engineering calculation method according to claim 1, wherein the step S6 includes the sub-steps of:
s61: classifying the construction components, and calculating the engineering quantity and the size parameters of the construction components of the same type;
s62: in the same category, removing construction components larger than a set size parameter threshold value;
s63: the sum of the engineering amounts of the construction elements of the respective kinds is taken as the engineering amount of the fabricated building project.
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| CN116777123A (en) * | 2023-08-22 | 2023-09-19 | 四川省建筑设计研究院有限公司 | Method for evaluating engineering quantity and engineering cost of assembled building based on BIM |
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