CN113537939A - Concrete cost control method based on BIM and Internet of things technology - Google Patents
Concrete cost control method based on BIM and Internet of things technology Download PDFInfo
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Abstract
The invention discloses a concrete cost control method based on BIM and Internet of things technology; the engineering structure has fixed geometric dimension, and can establish an accurate three-dimensional BIM model, and then count out accurate concrete quantity through the BIM model. The concrete mixing station has a fixed place, can carry out network coverage and has the condition of automatically acquiring concrete cost basic data through the Internet of things technology. The concrete engineering quantity counted by the BIM model and the raw material quantity consumed by the concrete mixing station are automatically generated and collected by computer software, so that the condition that data is manually modified is avoided, and the finally obtained concrete cost control data result is real and accurate.
Description
Technical Field
The invention relates to the field of constructional engineering concrete cost control, in particular to a concrete cost control method based on BIM and Internet of things technology.
Background
The concrete cost accounts for a large proportion of the whole construction engineering cost, and the cement and the sand stone consumed by the concrete are non-renewable resources, so that the exploitation of the ground materials can bring great damage to the local environment and the water and soil conservation, and the ecological restoration needs a long time. With the further increase of the basic engineering construction in China, the consumption of concrete raw materials such as cement, gravel and the like is huge, the price is saved and increased, and how to control the concrete cost is the need of the survival and development of enterprises, and the resource is saved and the need of well protecting the environment and the sustainable development of the society is also realized.
Disclosure of Invention
Therefore, in order to solve the above disadvantages, the invention provides a concrete cost control method based on the BIM and the internet of things technology.
The concrete cost control method based on the BIM and the Internet of things technology is characterized by comprising the following steps of (1) realizing the concrete cost control method based on the BIM and the Internet of things technology; the method is carried out as follows;
step 1; generating a WBS structure tree database by dividing unit, subsection and project projects according to the established three-dimensional BIM model; respectively counting the concrete quantity according to the following different parameters through a BIM model: the method comprises the steps of: namely unit, subsection and project division, such as pile foundation, pier stud, capping beam, bridge deck pavement and the like of bridge engineering; the concrete strength grade is as follows: i.e., C10, C15, C20, C25, etc.; the types of the concrete are as follows: such as common concrete, pumping concrete, underwater concrete, waterproof concrete, spraying concrete, stone concrete and the like; respectively counting the concrete quantity according to different parameters by picking or deriving the concrete quantity according to a BIM model detail table; if the concrete quantity is changed in the construction process, automatically counting the concrete quantity again after adjusting the BIM according to the changed drawing;
and the WBS structure tree division is to divide the permanent entity engineering according to the design drawing and the related standard requirements. Meanwhile, temporary projects of non-permanent entity projects and schematic models of construction measures are added in the BIM model structure tree, the temporary projects comprise residential construction, construction sidewalks, site construction and the like, and the construction measures comprise the number of support foundations, tower crane foundation concrete and the like; the concrete quantity of the non-permanent entity engineering is not specifically set when a BIM model of a permanent structure of a design drawing is established, and only an interface for inputting data later is reserved; after the non-permanent entity engineering implementation construction organization design is repeated, directly adding the repeated design quantity into the BIM;
step 2; establishing a concrete quota mix proportion database, namely, concrete mix proportions with different strength grades and different types are included, and the quota includes a ministered quota, a self enterprise quota and other enterprise quota concrete mix proportions in the same industry;
step 3; counting the number of the designed concrete by the BIM model WBS structure tree, sleeving a mix proportion database, and decomposing the number of the designed concrete into the theoretical number of raw materials such as cement, sand, broken stone, silica powder, an additive and the like; so far, the design concrete quantity derived through the BIM specification sheet and the theoretical quantity of the raw materials decomposed through the mixing proportion are available;
step 4; the WBS structure tree database divided by the BIM model is associated with a concrete mixing station control system, a field technician carries out instruction pushing through an APP end and approval through relevant departments and project management layers according to engineering parts (including permanent entity engineering, temporary engineering, construction measures and the like) to be constructed, operators of the concrete mixing station carry out concrete mixing according to instructions, and concrete is transported to a construction field for pouring. After pouring is finished, a field technician confirms the pouring quantity through the APP, and a mixing station worker rechecks the quantity. If the concrete is mixed, the amount of the mixed concrete is larger than the actual requirement on site, and the concrete is treated by two methods: one is to pour other engineering parts, such as pouring pavement, cushion layer and the like, and a new pouring part is added in the software consistent with the normal pouring; the two possibilities are abandoning, and the quantity of the part is separately remarked in software, so that the abandoned consumption is conveniently and separately counted;
step 5; through metering the consumption of the raw materials of the mixing station, the system automatically acquires the actual pouring quantity of the concrete at the poured engineering part and the actual consumption of the raw materials. The raw materials comprise powdered cement, silica powder, powdered different additives, aggregate-shaped sand, broken stone and pebble with different grain diameters, liquid water and aqueous different additives. The system automatically acquires the actual consumption of the raw materials by weighing and metering the powdery, aggregate-shaped and liquid raw materials; meanwhile, the system automatically collects the actual pouring amount of the concrete at the poured engineering part; the collected concrete and raw material actual consumption is counted according to a pre-divided WBS structure tree, actual consumption data is generated and stored in a database;
step 6; and comparing and analyzing the number of the 3 rd step and the 5 th step, and accounting the raw material consumption managed by the engineering site. Comparing the designed concrete quantity and the theoretical consumption quantity of the raw materials obtained by the BIM with the actual mixed concrete quantity and the raw material consumption quantity of the mixing station to obtain an engineering management and control result; and comparing the average advanced level with the average advanced level of the industry and the average level of the enterprise; generating concrete cost analysis data result 1; the average advanced level of the industry, for example, the road quota of the 2018 version traffic department has different loss proportions for different structural parts and different types of concrete, and the common structure has 2 percent of common concrete poured by a template; the method means that for the common concrete, the ratio of the actual raw material consumption amount of mixing of the mixing station to the designed theoretical consumption amount is less than or equal to 1.02, the management level reaches or exceeds the average advanced level of the industry, otherwise, the management level is lower than the average advanced level of the industry; each enterprise can also establish the material management and control loss standard by itself. Meanwhile, the comparative analysis is further divided into three parts of permanent entity engineering, non-permanent entity engineering (including temporary engineering and construction measures) and project overall engineering;
step 7; and (3) further, the quantity of the designed concrete in the step (3) is deducted from the volumes of the steel bars, the prestressed steel corrugated pipes and other embedded pipes in the structure, and the quantity of the net designed concrete is obtained through statistics. The deduction may be by: if the steel bars and the embedded pipe models are established in the BIM model, the volume can be directly deducted through the quantity of the detail list; or calculating the volume of the steel bar through the weight and the density of the steel bar, and calculating the volume of the embedded pipe through the outer diameter and the length of the embedded pipe. Meanwhile, the concrete cost analysis data result 2 is generated in a manner consistent with the manner of generating the concrete cost analysis data result 1 in the step 6. Preferably, the cost analysis data result 2 is used as a main basis for on-site management result assessment, and the analysis data result 1 is used as a reference for on-site management result assessment;
step 8; and checking the raw material in a bin of the mixing station, and checking the raw material consumption control result of the concrete mixing station. Subtracting the inventory quantity from the quantity of raw materials purchased by a material department, comparing the quantity with the actual consumption of the raw materials of the mixing station to obtain a raw material control result of the mixing station, and comparing the raw material control result with the industry average advanced level and the enterprise average level; resulting in concrete cost analysis data result 3. Average advanced levels of industry, such as operating and transport losses in the yard specified by the highway quota of the 2018 department of transportation, namely 2% cement, 4% sand and 2% gravel; meanwhile, each enterprise can also set the material control loss standard by itself; meanwhile, the method is consistent with the concrete cost analysis data result 1 in the step 6, and a concrete cost analysis data result 3 is generated and used as the basis for the examination of the raw material consumption control result of the mixing station;
step 9; taking place demolition works, such as demolition due to unqualified quality, design change or other reasons, counting the material consumption of the part separately in the WBS structure tree and consumption data, and explaining;
step 10; the mixing station material management and control can be implemented by accounting management and control according to ten days and months as required due to manual counting of raw materials, and the accounting is preferably carried out according to the working habits and management experiences and monthly; and (4) for project management and control accounting, automatically generating by software, and performing accounting according to the project casting each time. If the ratio exceeds the specified ratio, the system sends the result to the mobile phone of the project management team in time.
Step 11; automatically generating a concrete cost control report, and performing online electronic signing according to a management flow; the engineering quality is also reflected and deduced from a certain degree of side surface through the material consumption; and displaying the BIM visualization model of the concrete cost control result according to the management responsibility and the authority.
The invention has the following advantages: the engineering structure has fixed geometric dimension, and can establish an accurate three-dimensional BIM model, and then count out accurate concrete quantity through the BIM model. The concrete mixing station has a fixed place, can carry out network coverage and has the condition of automatically acquiring concrete cost basic data through the Internet of things technology. The engineering quantity statistics of the BIM model and the raw material quantity consumed by the concrete mixing station are automatically generated by computer software, so that the condition that data is manually modified is avoided, and the finally obtained concrete cost control data result is real and accurate.
Drawings
Fig. 1 is a schematic diagram of a management and control module according to the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a concrete cost control method based on BIM and Internet of things technology, which is characterized in that the concrete cost control method comprises the following steps of (1) carrying out concrete cost control on concrete according to the BIM and Internet of things technology; the method is carried out as follows;
step 1; generating a WBS structure tree database by dividing unit, subsection and project projects according to the established three-dimensional BIM model; respectively counting the concrete quantity according to the following different parameters through a BIM model: the method comprises the steps of: namely unit, subsection and project division, such as pile foundation, pier stud, capping beam, bridge deck pavement and the like of bridge engineering; the concrete strength grade is as follows: i.e., C10, C15, C20, C25, etc.; the types of the concrete are as follows: such as common concrete, pumping concrete, underwater concrete, waterproof concrete, spraying concrete, stone concrete and the like; respectively counting the concrete quantity according to different parameters by picking or deriving the concrete quantity according to a BIM model detail table; if the concrete quantity is changed in the construction process, automatically counting the concrete quantity again after adjusting the BIM according to the changed drawing;
and the WBS structure tree division is to divide the permanent entity engineering according to the design drawing and the related standard requirements. Meanwhile, temporary projects of non-permanent entity projects and schematic models of construction measures are added in the BIM model structure tree, the temporary projects comprise residential construction, construction sidewalks, site construction and the like, and the construction measures comprise the number of support foundations, tower crane foundation concrete and the like; the concrete quantity of the non-permanent entity engineering is not specifically set when a BIM model of a permanent structure of a design drawing is established, and only an interface for inputting data later is reserved; after the non-permanent entity engineering implementation construction organization design is repeated, directly adding the repeated design quantity into the BIM;
step 2; establishing a concrete quota mix proportion database, namely, concrete mix proportions with different strength grades and different types are included, and the quota includes a ministered quota, a self enterprise quota and other enterprise quota concrete mix proportions in the same industry;
step 3; counting the number of the designed concrete by the BIM model WBS structure tree, sleeving a mix proportion database, and decomposing the number of the designed concrete into the theoretical number of raw materials such as cement, sand, broken stone, silica powder, an additive and the like; so far, the design concrete quantity derived through the BIM specification sheet and the theoretical quantity of the raw materials decomposed through the mixing proportion are available;
step 4; the WBS structure tree database divided by the BIM model is associated with a concrete mixing station control system, a field technician carries out instruction pushing through an APP end and approval through relevant departments and project management layers according to engineering parts (including permanent entity engineering, temporary engineering, construction measures and the like) to be constructed, operators of the concrete mixing station carry out concrete mixing according to instructions, and concrete is transported to a construction field for pouring. After pouring is finished, a field technician confirms the pouring quantity through the APP, and a mixing station worker rechecks the quantity. If the concrete is mixed, the amount of the mixed concrete is larger than the actual requirement on site, and the concrete is treated by two methods: one is to pour other engineering parts, such as pouring pavement, cushion layer and the like, and a new pouring part is added in the software consistent with the normal pouring; the two possibilities are abandoning, and the quantity of the part is separately remarked in software, so that the abandoned consumption is conveniently and separately counted;
step 5; through metering the consumption of the raw materials of the mixing station, the system automatically acquires the actual pouring quantity of the concrete at the poured engineering part and the actual consumption of the raw materials. The raw materials comprise powdered cement, silica powder, powdered different additives, aggregate-shaped sand, broken stone and pebble with different grain diameters, liquid water and aqueous different additives. The system automatically acquires the actual consumption of the raw materials by weighing and metering the powdery, aggregate-shaped and liquid raw materials; meanwhile, the system automatically collects the actual pouring amount of the concrete at the poured engineering part; the collected concrete and raw material actual consumption is counted according to a pre-divided WBS structure tree, actual consumption data is generated and stored in a database;
step 6; and comparing and analyzing the number of the 3 rd step and the 5 th step, and accounting the raw material consumption managed by the engineering site. Comparing the designed concrete quantity and the theoretical consumption quantity of the raw materials obtained by the BIM with the actual mixed concrete quantity and the raw material consumption quantity of the mixing station to obtain an engineering management and control result; and comparing the average advanced level with the average advanced level of the industry and the average level of the enterprise; generating concrete cost analysis data result 1; the average advanced level of the industry, for example, the road quota of the 2018 version traffic department has different loss proportions for different structural parts and different types of concrete, and the common structure has 2 percent of common concrete poured by a template; the method means that for the common concrete, the ratio of the actual raw material consumption amount of mixing of the mixing station to the designed theoretical consumption amount is less than or equal to 1.02, the management level reaches or exceeds the average advanced level of the industry, otherwise, the management level is lower than the average advanced level of the industry; each enterprise can also establish the material management and control loss standard by itself. Meanwhile, the comparative analysis is further divided into three parts of permanent entity engineering, non-permanent entity engineering (including temporary engineering and construction measures) and project overall engineering;
step 7; and (3) further, the quantity of the designed concrete in the step (3) is deducted from the volumes of the steel bars, the prestressed steel corrugated pipes and other embedded pipes in the structure, and the quantity of the net designed concrete is obtained through statistics. The deduction may be by: if the steel bars and the embedded pipe models are established in the BIM model, the volume can be directly deducted through the quantity of the detail list; or calculating the volume of the steel bar through the weight and the density of the steel bar, and calculating the volume of the embedded pipe through the outer diameter and the length of the embedded pipe. Meanwhile, the concrete cost analysis data result 2 is generated in a manner consistent with the manner of generating the concrete cost analysis data result 1 in the step 6. Preferably, the cost analysis data result 2 is used as a main basis for on-site management result assessment, and the analysis data result 1 is used as a reference for on-site management result assessment;
step 8; and checking the raw material in a bin of the mixing station, and checking the raw material consumption control result of the concrete mixing station. Subtracting the inventory quantity from the quantity of raw materials purchased by a material department, comparing the quantity with the actual consumption of the raw materials of the mixing station to obtain a raw material control result of the mixing station, and comparing the raw material control result with the industry average advanced level and the enterprise average level; resulting in concrete cost analysis data result 3. Average advanced levels of industry, such as operating and transport losses in the yard specified by the highway quota of the 2018 department of transportation, namely 2% cement, 4% sand and 2% gravel; meanwhile, each enterprise can also set the material control loss standard by itself; meanwhile, the method is consistent with the concrete cost analysis data result 1 in the step 6, and a concrete cost analysis data result 3 is generated and used as the basis for the examination of the raw material consumption control result of the mixing station;
step 9; taking place demolition works, such as demolition due to unqualified quality, design change or other reasons, counting the material consumption of the part separately in the WBS structure tree and consumption data, and explaining;
step 10; the mixing station material management and control can be implemented by accounting management and control according to ten days and months as required due to manual counting of raw materials, and the accounting is preferably carried out according to the working habits and management experiences and monthly; and (4) for project management and control accounting, automatically generating by software, and performing accounting according to the project casting each time. If the ratio exceeds the specified ratio, the system sends the result to the mobile phone of the project management team in time.
Step 11; automatically generating a concrete cost control report, and performing online electronic signing according to a management flow; the engineering quality is also reflected and deduced from a certain degree of side surface through the material consumption; and displaying the BIM visualization model of the concrete cost control result according to the management responsibility and the authority.
Analyzing data results including results 1-3 according to concrete cost, dividing the material loss into the standard specified range and the standard specified range, and calculating the weighted average purchasing unit price counted by a material department to obtain the amount of money in the concrete loss specified range and the amount of money out of the concrete loss specified range; and automatically generating a concrete cost control report, and performing online electronic signing according to the management flow. And (4) the amount of money outside the specified range of concrete loss is a key control object, and reason analysis and formulation are carried out, and the adjustment and modification measures are implemented.
The concrete cost data is directly reflected through the material consumption, and the engineering quality is also reflected and deduced from the side surface to a certain degree. For permanent structure parts which are easy to generate material loss due to work stealing, such as slab concrete for tunnel inverted arch concrete backfill and shield engineering, quality control results are also reflected by analyzing whether the material consumption of the engineering of the parts is greatly reduced or not. In addition, by comparing the design strength of the project concrete of the WBS structure tree with the strength and the type of the concrete actually mixed, for example, the design strength of the pile foundation concrete of a certain bridge is C30, and the actual mixed strength may appear to be C25; the control result of the concrete quality pipe can be reflected through strength comparison, and if the state occurs, the system automatically pushes warning information to a mobile phone of a project management team.
According to management responsibilities and authorities, a BIM visual model of a concrete cost control result is displayed: and units such as a construction project department, a general contract department, a molecular company, a group company, a supervision department, an owner, a quality supervision department and the like see the BIM visual model of the control result of the multi-dimensional concrete mixing station through software in real time. The visualization model automatically generates three-dimensional BIM models rendered and displayed in different colors through theory and actual consumption comparison data of concrete and raw materials thereof; meanwhile, two-dimensional plane graphs, such as column graphs, broken line graphs, pie graphs, radar graphs and the like, can be automatically generated according to the cost control result. As the commercial data is involved, for the supervision of external units, owners and quality supervision departments, only the consumption of concrete materials can be seen through data shielding, but the money of the materials cannot be seen.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A concrete cost control method based on BIM and Internet of things technology is characterized in that; the method is carried out as follows;
step 1; generating a WBS structure tree database by dividing unit, subsection and project projects according to the established three-dimensional BIM model; respectively counting the quantity of concrete according to different parameters through a BIM model; if the concrete quantity is changed in the construction process, automatically counting the concrete quantity again after adjusting the BIM according to the changed drawing;
step 2; establishing a concrete quota mix proportion database, namely, concrete mix proportions with different strength grades and different types are included, and the quota includes a ministered quota, a self enterprise quota and other enterprise quota concrete mix proportions in the same industry;
step 3; counting the number of the designed concrete by the BIM model WBS structure tree, sleeving a mix proportion database, and decomposing the number of the designed concrete into the theoretical number of raw materials such as cement, sand, broken stone, silica powder, an additive and the like; so far, the design concrete quantity derived through the BIM specification sheet and the theoretical quantity of the raw materials decomposed through the mixing proportion are available;
step 4; associating a WBS structure tree database divided by a BIM model with a concrete mixing station control system, pushing instructions by a field technician according to engineering parts (including permanent physical engineering, temporary engineering, construction measures and the like) to be constructed through an APP end and examining and approving the engineering parts through related departments and project management layers, mixing concrete by operators of a concrete mixing station according to the instructions, and transporting the concrete to a construction site for pouring; after pouring is finished, a field technician confirms the pouring quantity through the APP, and a mixing station worker rechecks the quantity; if the concrete is mixed, the amount of the mixed concrete is larger than the actual requirement on site, and the concrete is treated by two methods: one is to pour other engineering parts, such as pouring pavement, cushion layer and the like, and a new pouring part is added in the software consistent with the normal pouring; the two possibilities are abandoning, and the quantity of the part is separately remarked in software, so that the abandoned consumption is conveniently and separately counted;
step 5; through the measurement of raw material consumption, the system automatically acquires the actual pouring quantity of concrete at the poured engineering part and the actual consumption of raw materials; the raw materials comprise powdered cement, silica powder, powdered different additives, aggregate-shaped sand, broken stone and pebble with different grain diameters, liquid water and aqueous different additives; the system automatically acquires the actual consumption of the raw materials by weighing and metering the powdery, aggregate-shaped and liquid raw materials; meanwhile, the system automatically collects the actual pouring amount of the concrete at the poured engineering part; the collected concrete and raw material actual consumption is counted according to a pre-divided WBS structure tree, actual consumption data is generated and stored in a database;
step 6; comparing and analyzing the number of the 3 rd step and the 5 th step, and accounting the raw material consumption of engineering field management; comparing the designed concrete quantity and the theoretical consumption quantity of the raw materials obtained by the BIM with the actual mixed concrete quantity and the raw material consumption quantity of the mixing station to obtain an engineering management and control result; and comparing the average advanced level with the average advanced level of the industry and the average level of the enterprise; generating concrete cost analysis data result 1; meanwhile, the comparative analysis is further divided into three parts of permanent entity engineering, non-permanent entity engineering (including temporary engineering and construction measures) and project overall engineering;
step 7; further, the quantity of the designed concrete in the step 3 is deducted by the volumes of the steel bars, the prestressed steel corrugated pipes and other embedded pipes in the structure, and the quantity of the net designed concrete is obtained through statistics; the deduction may be by: if the steel bars and the embedded pipe models are established in the BIM model, the volume can be directly deducted through the quantity of the detail list; or calculating the volume of the steel bar through the weight and the density of the steel bar, and calculating the volume of the embedded pipe through the outer diameter and the length of the embedded pipe; meanwhile, the mode is consistent with the mode of generating the concrete cost analysis data result 1 in the step 6, and a concrete cost analysis data result 2 is generated; preferably, the cost analysis data result 2 is used as a main basis for on-site management result assessment, and the analysis data result 1 is used as a reference for on-site management result assessment;
step 8; after the stock bin of the mixing station is subjected to raw material checking, checking a raw material consumption control result of the concrete mixing station; subtracting the inventory quantity from the quantity of raw materials purchased by a material department, comparing the quantity with the actual consumption of the raw materials of the mixing station to obtain a raw material control result of the mixing station, and comparing the raw material control result with the industry average advanced level and the enterprise average level; generating concrete cost analysis data result 3; average advanced levels of industry, such as operating and transport losses in the yard specified by the highway quota of the 2018 department of transportation, namely 2% cement, 4% sand and 2% gravel; meanwhile, each enterprise can also set the material control loss standard by itself; meanwhile, the method is consistent with the concrete cost analysis data result 1 in the step 6, and a concrete cost analysis data result 3 is generated and used as the basis for the examination of the raw material consumption control result of the mixing station;
step 9; taking place demolition works, such as demolition due to unqualified quality, design change or other reasons, counting the material consumption of the part separately in the WBS structure tree and consumption data, and explaining;
step 10; the mixing station material management and control can be implemented by accounting management and control according to ten days and months as required due to manual counting of raw materials, and the accounting is preferably carried out according to the working habits and management experiences and monthly; for project management and control accounting, automatically generating by software, and performing accounting according to each poured subentry project;
if the ratio exceeds the specified ratio, the system sends the result to the mobile phone of the project management team in time;
step 11; automatically generating a concrete cost control report, and performing online electronic signing according to a management flow; the engineering quality is also reflected and deduced from a certain degree of side surface through the material consumption; and displaying the BIM visualization model of the concrete cost control result according to the management responsibility and the authority.
2. The concrete cost control method based on the BIM and the Internet of things technology according to claim 1, characterized in that; the step 1 also comprises the following operations; WBS structure tree division, which is to divide a permanent entity project according to a design drawing and related standard requirements; meanwhile, temporary projects of non-permanent entity projects and schematic models of construction measures are added in the BIM model structure tree, the temporary projects comprise residential construction, construction sidewalks, site construction and the like, and the construction measures comprise the number of support foundations, tower crane foundation concrete and the like; the concrete quantity of the non-permanent entity engineering is not specifically set when a BIM model of a permanent structure of a design drawing is established, and only an interface for inputting data later is reserved; and after the non-permanent entity engineering implementation construction organization design is repeated, directly adding the repeated design quantity into the BIM.
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