CN116777679A - Engineering quantity calculating method and system based on BIM model - Google Patents

Engineering quantity calculating method and system based on BIM model Download PDF

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CN116777679A
CN116777679A CN202311051070.5A CN202311051070A CN116777679A CN 116777679 A CN116777679 A CN 116777679A CN 202311051070 A CN202311051070 A CN 202311051070A CN 116777679 A CN116777679 A CN 116777679A
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CN116777679B (en
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刘琪琼
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Beijing Zhongchang Engineering Consulting Co ltd
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Abstract

The invention relates to the technical field of engineering calculation, in particular to a method and a system for calculating engineering based on a BIM model. Comprising determining common models in building components of an amount of work to be calculatedVariable modelSpecial modelIn combination with a set of building parameters. The invention uses the common model in the building component for determining the engineering quantity to be calculatedVariable modelSpecial modelThe workload in the building calculation process is reduced, the engineering quantity calculation efficiency of the building with the engineering quantity to be calculated is improved, and meanwhile, the special building model with the engineering quantity to be calculated is boundContinuously expanding the parameter set of the building, improving the comparison range of the parameter set of the building and increasing the comparison adaptability of the parameter set of the building.

Description

Engineering quantity calculating method and system based on BIM model
Technical Field
The invention relates to the technical field of engineering calculation, in particular to a method and a system for calculating engineering based on a BIM model.
Background
The BIM model is a datamation tool applied to engineering design, construction and management, and is used for sharing and transmitting in the whole life cycle process of project planning, operation and maintenance by integrating datamation and informatization models of buildings, so that engineering technicians can correctly understand and effectively respond to various building information, a cooperative work foundation is provided for design teams and construction main bodies of all sides including the buildings and operation units, important functions are played in the aspects of improving production efficiency, saving cost and shortening construction period, and in the process of building the BIM model, all engineering quantities of an actual building are required to be calculated.
In the process of calculating the engineering quantity of the BIM model, as the building components are numerous in the process of building planning, the engineering quantity of the whole building needs to be calculated step by step, so that the calculation process is complicated and calculation errors are easy to occur, while in the existing building, in order to reduce the design difficulty, part of the building components can refer to the buildings of the same type, for example, the building rooms of the same floor, the internal structures are approximately the same, if the engineering quantity of the building components of the overlapped part refers to the building components of the same type, the calculation work of the building engineering quantity is greatly reduced, and meanwhile, the characteristics of the building components are obvious, and the characteristics of the building components and the corresponding engineering quantity are bound, so that the calculation work of the building engineering quantity is further reduced.
In order to address the above problems, a method and system for calculating engineering amount based on BIM model are needed.
Disclosure of Invention
The invention aims to provide an engineering quantity calculating method and system based on a BIM model, so as to solve the problems in the background technology.
In order to achieve the above object, one of the objects of the present invention is to provide a method for calculating engineering amount based on a BIM model, comprising the steps of:
s1, planning various parameters in the process of calculating the engineering quantity of a buildingGenerating a necessary parameter set of engineering quantity；
S2, collecting characteristic points of each building, and marking each building type through the characteristic points;
s3, combining and generating a necessary parameter set of engineering quantityCalculating the respective component parameter values corresponding to the respective types of buildings>Total amount parameter value->，
S4, binding building characteristic points and various component parameter valuesTotal amount parameter value->Building a building parameter set;
s5, obtaining characteristic points of the building of the engineering quantity to be calculated, comparing the characteristic points with each building type marked in the S2, and determining the building type of the current engineering quantity to be calculated;
s6, carrying out composition analysis on the engineering quantity building to be calculated of the determined type, and determining a common model in building components of the engineering quantity to be calculatedVariable model->Special model->；
S7, calculating a common building model of the engineering quantity to be calculated by combining the building parameter set in the S4Variable model +.>Is measured manually and a special model +.>Parameter values;
s8, binding the special building model of the engineering quantity to be calculated in the S7Is complemented to the building parameter set in S4.
As a further improvement of the technical scheme, the engineering quantity in S1 is a necessary parameter setIncluding the engineering quantity of a leveling field, the excavation quantity of foundation earthwork and the engineering quantity of backfill soil.
As a further improvement of the technical scheme, the flat field engineering quantity is calculated by adopting a flat field calculation algorithm, and the algorithm formula is as follows:
；
wherein the method comprises the steps ofFor leveling the field engineering quantity, A is the length of the outer edge line of the outer wall in the length direction of the building, B is the length of the outer edge line of the outer wall in the width direction of the building, and +.>For the building floor area of the building, < > for>Is the perimeter of the outer edge line of the outer wall of the building.
As a further improvement of the present technical solution, the method for collecting the feature points of each building in S2 includes the following steps:
s2.1, determining calculation steps in the calculation process of each parameter;
s2.2, combining the calculation steps, and determining calculation parameter values corresponding to the parameters as characteristic points of the building.
As a further improvement of the present technical solution, the method for performing composition analysis on the engineering quantity building to be calculated in the determined type in S6 includes the following steps:
s6.1, planning a rough composition analysis mode, and carrying out rough composition analysis on the engineering quantity building to be calculated;
s6.2, combining the rough composition analysis result, comparing the rough composition part of the engineering quantity building to be calculated with the building parameter set, and determining a common modelBuilding components to be aligned;
s6.3, planning a subdivision composition analysis mode, and analyzing subdivision compositions of building components to be compared;
s6.4, combining the analysis result of the subdivision components, comparing the subdivision components of the engineering quantity building to be calculated with the building parameter set, and determining a variable modelSpecial model->。
As a further improvement of the technical scheme, the special model is measured manually in the step S7The method of parameter values comprises the steps of:
s7.1, recording a manual measurement flow;
s7.2, marking each measured value sequentially according to the manual measurement flow to serve as a special modelFeature points.
As a further improvement of the present technical solution, the method for complementing the building parameter set in S4 in S8 includes the following steps:
s8.1, determining a building special model of the engineering quantity to be calculatedThe proportion is as follows;
s8.2, planning a proportion threshold value, and aiming at a special modelAnd (5) performing classification processing.
As a further improvement of the technical scheme, the method of the building parameter set complemented to the S4 in the S8 adopts a threshold comparison algorithm, and the algorithm formula is as follows:
；
；
wherein the method comprises the steps ofFor special model->Proportion of (1)/(L)>Building special model for engineering quantity to be calculatedQuantity of->Total building composition model for the amount of work to be calculated,/->For threshold comparison function, ++>For the proportional threshold, when the special model +.>Proportion of->Below the proportional threshold +.>At the time, threshold comparison function->The output is 0, only the special model is needed to be added>Is added into the parameter set of the building when the special model is +.>Proportion of occupiedNot lower than the proportional threshold->At the time, the threshold value comparison function/>And outputting 1, and carrying out centralized supplementary recording on each parameter value of the whole building.
The second object of the invention is to provide a system suitable for the engineering quantity calculating method based on BIM model, comprising an engineering quantity parameter planning module, a building type classifying module, a parameter value calculating module, a parameter set establishing module, a building comparison module to be calculated, a component model classifying module and a component model parameter value calculating module;
the engineering quantity parameter planning module is used for planning various parameters in the building engineering quantity calculation processGenerating a necessary parameter set of engineering quantity +.>The output end of the engineering quantity parameter planning module is connected with the input end of the building type classification module, the building type classification module is used for collecting characteristic points of each building, each building type is marked through the characteristic points, the output end of the building type classification module is connected with the input end of the parameter value calculation module, and the parameter value calculation module is used for combining and generating a necessary parameter set of engineering quantity>Calculating the respective component parameter values corresponding to the respective types of buildings>Total amount parameter value->The output end of the parameter value calculation module is connected with the input end of the parameter set establishment module, and the parameter set establishment module is used for binding building characteristic points and various component parameter values->Total amount of ginsengNumerical value->Building parameter sets are built, the output end of a parameter set building module is connected with the input end of a building comparison module to be calculated, the building comparison module to be calculated is used for obtaining characteristic points of a building of the engineering quantity to be calculated and comparing the characteristic points with marked building types to determine the type of the building of the current engineering quantity to be calculated, the output end of the building comparison module to be calculated is connected with the input end of a composition model classification module, and the composition model classification module is used for carrying out composition analysis on the building of the engineering quantity to be calculated of the determined type and determining a common model in building components of the engineering quantity to be calculated>Variable model->Special model->The output end of the component model classification module is connected with the input end of the component model parameter value calculation module, and the component model parameter value calculation module is combined with a building parameter set to calculate a building common model of the engineering quantity to be calculated>Variable model +.>Is measured manually and a special model +.>Parameter values, followed by binding of building specific models of the quantities to be calculated>Is added to the building parameter set.
Compared with the prior art, the invention has the beneficial effects that:
in the engineering quantity calculating method and system based on the BIM model, the common model in the building component part of the engineering quantity to be calculated is determinedVariable model->Special model->The workload in the building calculation process is reduced, the engineering quantity calculation efficiency of the building with the engineering quantity to be calculated is improved, and meanwhile, the special building model with the engineering quantity to be calculated is bound>Continuously expanding the parameter set of the building, improving the comparison range of the parameter set of the building and increasing the comparison adaptability of the parameter set of the building.
Drawings
FIG. 1 is an overall flow chart of embodiment 1 of the present invention;
FIG. 2 is a flow chart of a method for collecting feature points of each building according to embodiment 1 of the present invention;
FIG. 3 is a flow chart of a method for analyzing the composition of a determined type of engineering quantity building to be calculated according to embodiment 1 of the present invention;
FIG. 4 shows a special model obtained by manual measurement according to embodiment 1 of the present inventionA method flow block diagram of parameter values;
FIG. 5 is a flow chart of the method of the embodiment 1 of the present invention for supplementing the building parameter set in S4;
fig. 6 is a schematic diagram of the overall system structure of embodiment 1 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1:
referring to fig. 1-6, one of the purposes of the present embodiment is to provide a method for calculating engineering amount based on a BIM model, which includes the following steps:
s1, planning various parameters in the process of calculating the engineering quantity of a buildingGenerating a necessary parameter set of engineering quantity；
S2, collecting characteristic points of each building, and marking each building type through the characteristic points;
s3, combining and generating a necessary parameter set of engineering quantityCalculating the respective component parameter values corresponding to the respective types of buildings>Total amount parameter value->，
S4, binding building characteristic points and various component parameter valuesTotal amount parameter value->Building a building parameter set;
s5, obtaining characteristic points of the building of the engineering quantity to be calculated, and comparing the characteristic points with each building type marked in the S2 to determine the building type of the current engineering quantity to be calculated;
s6, carrying out composition analysis on the engineering quantity building to be calculated of the determined type, and determining a common model in building components of the engineering quantity to be calculatedVariable model->Special model->；
S7, calculating a common building model of the engineering quantity to be calculated by combining the building parameter set in the S4Variable model +.>Is measured manually and a special model +.>Parameter values;
s8, binding the special building model of the engineering quantity to be calculated in S7Is complemented to the building parameter set in S4.
When the building construction method is specifically used, in the process of calculating the engineering quantity of the BIM model, as the building components are numerous in the process of building planning, the engineering quantity of the whole building needs to be calculated step by step, so that the calculation process is complicated and calculation errors are easy to occur, in order to reduce the design difficulty of the existing building, part of the building components can be used for referencing the same type of building, for example, each building room on the same floor, the internal structure is approximately the same, if the engineering quantity of the building components of the overlapped part is referenced to the building components of the same type, the calculation work of the building engineering quantity is greatly reduced, meanwhile, the characteristics of each building component are obvious, and the calculation work of the building engineering quantity is further reduced by binding the characteristics of the building components and the corresponding engineering quantity;
in order to solve the problems, it is first necessary to plan parameters in the calculation of the building engineering amountFor example, foundation earth excavation quantity, generating engineering quantity necessary parameter set +.>Then collecting the characteristic points of each building, marking each building type, such as the overall height of the building, the space size of a single floor, the space mode of floor planning and the like, through the characteristic points, and combining to generate a parameter set which is necessary for engineering quantity>Calculating the respective component parameter values corresponding to the respective types of buildings>Total amount parameter value->Composition parameter value->I.e. the parameter values of the individual components of the building, andtotal amount parameter value->And then binding the building feature points, the individual component parameter values +.>Total amount parameter value->Building parameter sets are established, it being worth noting that building parameter sets combine the individual constituent parameter values +.>Total amount parameter value->Storing through different databases, binding the same type of building characteristic points, and calling the parameter values of the single component part as a later stage;
when the engineering quantity calculation is needed to be carried out on the building with the engineering quantity to be calculated, firstly, the characteristic points of the building with the engineering quantity to be calculated are needed to be obtained, and are compared with marked building types to determine the type of the building with the current engineering quantity to be calculated, then, the composition analysis is carried out on the building with the engineering quantity to be calculated of the determined type, and the common model in the building component parts with the engineering quantity to be calculated is determinedVariable model->Special model->Common model->: for success with the same type of building component ratio, variable model +.>: component of the building of the current work load to be calculated, which is not successfully compared with the building component of the same type, and the component is successfully compared with the building component of different types, special model->: the building model classification of the engineering quantity to be calculated is completed, and then the building parameter set is combined to calculate the common building model of the engineering quantity to be calculated ∈>Variable model +.>Is measured manually and a special model +.>Parameter values, finally, binding building special models of the engineering quantity to be calculated +.>Is added to the building parameter set.
The invention uses the common model in the building component for determining the engineering quantity to be calculatedVariable modelSpecial model->Calculating a common building model of the engineering quantity to be calculated by combining the building parameter set>Variable model +.>Directly calling the parameter values of the coincident components in the building of the engineering quantity to be calculated, reducing the workload in the process of calculating the building, improving the efficiency of calculating the engineering quantity of the building of the engineering quantity to be calculated, and simultaneously, binding a special model of the building of the engineering quantity to be calculated->Is added to the building parameter set, the building parameter set is continuously expanded, the comparison range of the building parameter set is improved, and the comparison adaptability of the building parameter set is improved.
Further, the engineering quantity in S1 is a necessary parameter setIncluding the engineering quantity of a leveling field, the excavation quantity of foundation earthwork and the engineering quantity of backfill soil. The construction quantity of the leveling site is excavation, filling, transporting and leveling of the building site with the thickness within +/-30 cm, the foundation earth excavation quantity is earth excavation volume, the earth excavation volume=the bottom area of the earth excavation is multiplied by the earth excavation depth, the backfill construction quantity is foundation pit and foundation pit backfill volume, and the backfill volume=the foundation pit or foundation pit excavation volume-the volume of the embedded part of the building below the designed outdoor terrace.
Still further, the calculation of the engineering quantity of the leveling site adopts a leveling site calculation algorithm, and the algorithm formula is as follows:
；
wherein the method comprises the steps ofFor leveling the field engineering quantity, A is the length of the outer edge line of the outer wall in the length direction of the building, B is the length of the outer edge line of the outer wall in the width direction of the building, and +.>For the building floor area of the building, < > for>Is the perimeter of the outer edge line of the outer wall of the building.
Specifically, the method for collecting the feature points of each building in the step S2 comprises the following steps:
s2.1, determining calculation steps in the calculation process of each parameter;
s2.2, combining the calculation steps, and determining calculation parameter values corresponding to the parameters as characteristic points of the building.
In the process of collecting the characteristic points of each building, firstly, the calculation step in the calculation process of each parameter needs to be determined, namely, the calculation parameter value needs to measure each numerical value of the building, such as the size of the bottom area, the soil digging depth and the like, which can be obtained through the design drawing of the building, and then, the calculation parameter value corresponding to each parameter is determined by combining the calculation step and is used as the characteristic point of the building for identifying the type of the building in the later period.
In addition, the composition analysis method for the engineering quantity building to be calculated of the determined type in S6 includes the following steps:
s6.1, planning a rough composition analysis mode, and carrying out rough composition analysis on the engineering quantity building to be calculated;
s6.2, combining the rough composition analysis result, comparing the rough composition part of the engineering quantity building to be calculated with the building parameter set, and determining a common modelBuilding components to be aligned;
s6.3, planning a subdivision composition analysis mode, and analyzing subdivision compositions of building components to be compared;
s6.4, combining the analysis result of the subdivision components, comparing the subdivision components of the engineering quantity building to be calculated with the building parameter set, and determining a variable modelSpecial model->。
In the process of carrying out composition analysis on the engineering quantity building to be calculated, firstly planning a rough composition analysis mode, carrying out rough composition analysis on the engineering quantity building to be calculated, for example, comparing all rooms on the same floor, determining the rooms on the same floor as the building parameter set, and marking the successfully-compared rooms as a common modelThe engineering quantity is directly referenced to the comparison room to obtain the known engineering quantity, the room which is not successfully compared after the rough composition analysis is finished is marked with the building components which are not to be compared, then the subdivision composition analysis mode is planned, the subdivision composition analysis is carried out on the building components which are to be compared, for example, the quantity of the walls which are formed in each room, the quantity and the size of the openings of each wall are combined with the subdivision composition analysis result, the subdivided components are compared with the building parameter set, namely, the comparison walls in the building parameter set which are coincident with the component walls of the room are marked as a variable model->It should be noted that the comparison is now a component of each type of building of the entire set of building parameters, not just of the same type of building as the amount of work to be calculated, so that the comparison range can be increased, the comparison success rate can be increased, and then the successful subdivision component is not necessarily marked as a special model>。
Due to special modelsThe method can not be compared with a building parameter set, engineering quantity call can not be carried out in the actual measurement process, and measurement is needed by manual work, and besides, a special model ++ ++is measured by manual work in S7>The method of parameter values comprises the steps of:
s7.1, recording a manual measurement flow;
s7.2, marking each measured value sequentially according to the manual measurement flow to serve as a special modelFeature points.
The manual measurement flow is required to be recorded, and each measurement value is marked sequentially according to the manual measurement flow to be used as a special modelAnd the characteristic points are used for carrying out characteristic point identification in the later stage and are used as reference standards for secondary measurement.
Special models for the presence of buildings of which the quantities are to be calculatedDifferent proportions, special model of the building when the quantity to be calculated is present +.>Too low, indicating the special model +.>The method for supplementing the building parameter set in S4 in S8 further comprises the following steps:
s8.1, determining a building special model of the engineering quantity to be calculatedThe proportion is as follows;
s8.2, planning a proportion threshold value, and aiming at a special modelAnd (5) performing classification processing.
The special model is put intoThe building parameter set is supplemented, so that in the process of supplementing the building parameter set, firstly, a building special model of the engineering quantity to be calculated is determined +.>The proportion is then programmed to be proportional to the particular model +.>Performing classification processing to obtain special model +.>And (3) independently supplementary recording the parameter values of the whole building, and carrying out centralized supplementary recording on the parameter values of the whole building with the planning proportion threshold value not lower than the planning proportion threshold value.
Still further, the method of the building parameter set complemented in S4 in S8 adopts a threshold comparison algorithm, and the algorithm formula is as follows:
；
；
wherein the method comprises the steps ofFor special model->Proportion of (1)/(L)>Building special model for engineering quantity to be calculatedQuantity of->Total building composition model for the amount of work to be calculated,/->For threshold comparison function, ++>For the proportional threshold, when the special model +.>Proportion of->Below the proportional threshold +.>At the time, threshold comparison function->The output is 0, only the special model is needed to be added>Is added into the parameter set of the building when the special model is +.>Proportion of occupiedNot lower than the proportional threshold->At the time, threshold comparison function->And outputting 1, and carrying out centralized supplementary recording on each parameter value of the whole building.
The second objective of the present embodiment is to provide a system suitable for a construction amount calculation method based on a BIM model, which comprises a construction amount parameter planning module, a building type classification module, a parameter value calculation module, a parameter set establishment module, a building comparison module to be calculated, a component model classification module and a component model parameter value calculation module;
wherein the engineering quantityThe parameter planning module is used for planning various parameters in the building engineering quantity calculation processGenerating a necessary parameter set of engineering quantity +.>The output end of the engineering quantity parameter planning module is connected with the input end of the building type classification module, the building type classification module is used for collecting characteristic points of each building, each building type is marked through the characteristic points, the output end of the building type classification module is connected with the input end of the parameter value calculation module, and the parameter value calculation module is used for generating a necessary parameter set of engineering quantity in a combined mode>Calculating the respective component parameter values corresponding to the respective types of buildings>Total amount parameter value->The output end of the parameter value calculation module is connected with the input end of the parameter set establishment module, and the parameter set establishment module is used for binding building characteristic points and various component parameter values +.>Total amount parameter value->Building parameter sets are built, the output end of the parameter set building module is connected with the input end of a building comparison module to be calculated, the building comparison module to be calculated is used for obtaining characteristic points of buildings of the engineering quantity to be calculated, comparing the characteristic points with marked building types to determine the types of the buildings of the engineering quantity to be calculated currently, the output end of the building comparison module to be calculated is connected with the input end of a composition model classification module, and the composition model classification module is used for carrying out composition analysis on the buildings of the engineering quantity to be calculated of the determined types and determining the composition of the buildings of the engineering quantity to be calculatedCommon model ∈>Variable model->Special model->The output end of the component model classification module is connected with the input end of the component model parameter value calculation module, and the component model parameter value calculation module is combined with a building parameter set to calculate a common building model of the engineering quantity to be calculated>Variable model +.>Is measured manually and a special model +.>Parameter values, followed by binding of building specific models of the quantities to be calculated>Is added to the building parameter set.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. The engineering amount calculating method based on the BIM model is characterized by comprising the following steps of:
s1 gaugeVarious parameters in calculating building engineering quantityGenerating a necessary parameter set of engineering quantity；
S2, collecting characteristic points of each building, and marking each building type through the characteristic points;
s3, combining and generating a necessary parameter set of engineering quantityCalculating respective composition parameter values corresponding to respective types of buildingsTotal amount parameter value->，
S4, binding building characteristic points and various component parameter valuesTotal amount parameter value->Building a building parameter set;
s5, obtaining characteristic points of the building of the engineering quantity to be calculated, comparing the characteristic points with each building type marked in the S2, and determining the building type of the current engineering quantity to be calculated;
s6, carrying out composition analysis on the engineering quantity building to be calculated of the determined type, and determining a common model in building components of the engineering quantity to be calculatedVariable model->Special model->；
S7, calculating a common building model of the engineering quantity to be calculated by combining the building parameter set in the S4Variable model +.>Is measured manually and a special model +.>Parameter values;
s8, binding the special building model of the engineering quantity to be calculated in the S7Is complemented to the building parameter set in S4.
2. The BIM model-based engineering amount calculation method of claim 1, wherein: the engineering quantity necessary parameter set in S1Including the engineering quantity of a leveling field, the excavation quantity of foundation earthwork and the engineering quantity of backfill soil.
3. The BIM model-based engineering amount calculation method according to claim 2, wherein: the flat field engineering quantity is calculated by adopting a flat field calculation algorithm, and the algorithm formula is as follows:
；
wherein the method comprises the steps ofFor leveling the field engineering quantity, A is the length of the outer edge line of the outer wall in the length direction of the building, B is the length of the outer edge line of the outer wall in the width direction of the building, and +.>For the building floor area of the building, < > for>Is the perimeter of the outer edge line of the outer wall of the building.
4. The BIM model-based engineering amount calculation method of claim 1, wherein: the method for collecting the characteristic points of each building in the S2 comprises the following steps:
s2.1, determining calculation steps in the calculation process of each parameter;
s2.2, combining the calculation steps, and determining calculation parameter values corresponding to the parameters as characteristic points of the building.
5. The BIM model-based engineering amount calculation method of claim 1, wherein: the composition analysis method for the engineering quantity building to be calculated of the determined type in the S6 comprises the following steps:
s6.1, planning a rough composition analysis mode, and carrying out rough composition analysis on the engineering quantity building to be calculated;
s6.2, combining the rough composition analysis result, comparing the rough composition part of the engineering quantity building to be calculated with the building parameter set, and determining a common modelBuilding components to be aligned;
s6.3, planning a subdivision composition analysis mode, and analyzing subdivision compositions of building components to be compared;
s6.4, combining the analysis result of the subdivision composition, comparing the subdivision composition of the engineering quantity building to be calculated with the building parameter set,determining a variable modelSpecial model->。
6. The BIM model-based engineering amount calculation method of claim 1, wherein: in S7, the special model is measured manuallyThe method of parameter values comprises the steps of:
s7.1, recording a manual measurement flow;
s7.2, marking each measured value sequentially according to the manual measurement flow to serve as a special modelFeature points.
7. The BIM model-based engineering amount calculation method of claim 1, wherein: the method for complementing the building parameter set in S4 in S8 includes the following steps:
s8.1, determining a building special model of the engineering quantity to be calculatedThe proportion is as follows;
s8.2, planning a proportion threshold value, and aiming at a special modelAnd (5) performing classification processing.
8. The BIM model-based engineering amount calculation method of claim 7, wherein: the method for complementing the building parameter set in S8 to the building parameter set in S4 adopts a threshold comparison algorithm, and the algorithm formula is as follows:
；
；
wherein the method comprises the steps ofFor special model->Proportion of (1)/(L)>Building special model for the amount of work to be calculated +.>Quantity of->Total building composition model for the amount of work to be calculated,/->For threshold comparison function, ++>For the proportional threshold, when the special model +.>Proportion of->Below the proportional threshold +.>At the time, threshold comparison function->The output is 0, only the special model is needed to be added>Is added into the parameter set of the building when the special model is +.>Proportion of->Not lower than the proportional threshold->At the time, threshold comparison function->And outputting 1, and carrying out centralized supplementary recording on each parameter value of the whole building.
9. A system adapted for use in the BIM model-based engineering quantity calculation method of any one of claims 1 to 8, wherein: the system comprises an engineering quantity parameter planning module, a building type classification module, a parameter value calculation module, a parameter set establishment module, a building comparison module to be calculated, a component model classification module and a component model parameter value calculation module;
the engineering quantity parameter planning module is used for planning various parameters in the building engineering quantity calculation processGenerating a necessary parameter set of engineering quantity +.>The output end of the engineering quantity parameter planning module is connected with the input end of the building type classification module, the building type classification module is used for collecting characteristic points of each building, each building type is marked through the characteristic points, and the building types are classifiedThe output end of the class module is connected with the input end of the parameter value calculation module, and the parameter value calculation module is used for generating a necessary parameter set of engineering quantity in a combining way>Calculating the respective component parameter values corresponding to the respective types of buildings>Total amount parameter value->The output end of the parameter value calculation module is connected with the input end of the parameter set establishment module, and the parameter set establishment module is used for binding building characteristic points and various component parameter values->Total amount parameter value->Building parameter sets are built, the output end of a parameter set building module is connected with the input end of a building comparison module to be calculated, the building comparison module to be calculated is used for obtaining characteristic points of a building of the engineering quantity to be calculated and comparing the characteristic points with marked building types to determine the type of the building of the current engineering quantity to be calculated, the output end of the building comparison module to be calculated is connected with the input end of a composition model classification module, and the composition model classification module is used for carrying out composition analysis on the building of the engineering quantity to be calculated of the determined type and determining a common model in building components of the engineering quantity to be calculated>Variable model->Special model->The output end of the component model classification module is connected with the input end of the component model parameter value calculation module, and the component model parameter value calculation module is combined with a building parameter set to calculate a building common model of the engineering quantity to be calculated>Variable model +.>Is measured manually and a special model +.>Parameter values, followed by binding of building specific models of the quantities to be calculated>Is added to the building parameter set.
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