CN116011066B - Building design method and system based on BIM technology - Google Patents
Building design method and system based on BIM technology Download PDFInfo
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Abstract
A building design method and system based on BIM technology comprises the following steps of S1: a building history design database; step S2: searching in a building historical design database to obtain a reference model, and modifying the reference model to obtain a completion model; step S3: modifying the completion model to obtain a plurality of modified models, distributing the modified models to each design terminal, modifying the completion model by each design terminal to obtain a first model, transmitting the first model to a transfer server, and modifying the first model by the transfer server to obtain a second model; step S4: overlapping the building main body structure and each second model to obtain an integrated model, and judging whether interference parts exist in the integrated model; step S5: each design terminal modifies the second model until no interference occurs within the integrated model. According to the method, the models of all the design units are uploaded to the cloud server for overlapping comparison, so that interference parts of BIM models of all the units can be found in early stages.
Description
Technical Field
The invention belongs to the technical field of three-dimensional modeling, and particularly relates to a building design method and system based on a BIM technology.
Background
BIM, a building information model, has been widely studied in the past decade as a promising technique for managing building lifecycles, and collaboration among departments can be achieved through data interoperability among different BIM applications. The construction of the BIM model is completed by cooperation and cooperation of different design units in multiple fields, each design department designs the BIM sub-model according to own experience knowledge, and then the BIM sub-models of each department are assembled and combined to obtain the assembly BIM model. However, in the assembly process, deviation exists in the size of the model, so that each BIM sub-model cannot be assembled and reworking of the BIM sub-model is required, and finally, construction progress is delayed.
Disclosure of Invention
In order to solve the problems, the invention provides a building design method and a system based on BIM technology, which are used for solving the problems that BIM submodels cannot be assembled and construction progress is delayed due to the deviation of the sizes of the models in the prior art.
In order to achieve the above object, the present invention provides a building design method based on BIM technology, comprising:
step S1: building a building restriction information database and a building historical design database, wherein the building restriction information database contains building design restriction conditions of each region, the building historical design database comprises historical building models which are designed completely, each historical building model is provided with an attribute label, and the attribute labels comprise building areas, building heights and building cost;
step S2: determining an address of a current building planning land and a preset attribute tag of a building, acquiring corresponding building design limiting conditions from the building limiting information database based on the address of the current planning land, searching in the building historical design database based on the acquired building design limiting conditions and the building area, building height and building cost in the preset attribute tag as searching characteristics to obtain a searching result, selecting one historical building model from the searching result as a reference model, modifying the reference model based on actual requirements of a user to obtain a completion model, dividing the completion model into a main structure and a plurality of substructures, wherein each substructures corresponds to one design terminal, and different design terminals are positioned in different design units;
step S3: setting a reference point in a virtual space where a completion model exists, fixing the relative position between the completion model and the reference point, modifying the completion model by a cloud server to obtain a plurality of modification models, wherein each modification model corresponds to one design terminal, the modification models comprise a main body structure of the completion model and a substructure which corresponds to the design terminal and needs to be perfected, the cloud server distributes the modification models to each design terminal, each design terminal modifies the completion model to obtain a first model, and in the completion model modification process of the design terminal, the first model is transmitted to a transfer server at fixed time intervals, and the transfer server rejects building main body structures in the first model to obtain a second model;
step S4: the transit server marks the second models based on the IP addresses of the design terminals and uploads the second models to a cloud server, a building main body structure is stored in the cloud server, the cloud server overlaps the building main body structure and the second models based on reference points to obtain an integrated model, and if the integrated model has interference parts, the cloud server obtains the second models related to the interference parts, designs the design terminals of the models based on the marked indexes of the second models and sends interference warning notification to the indexed design terminals;
step S5: and each design terminal modifies the second model with interference until no interference occurs in the integrated model.
Further, in the step S2, the searching in the building history design database includes the steps of:
step S21: removing the historical building model which does not meet the limiting conditions of the building design in the building historical design database;
step S22: establishing a three-dimensional coordinate system, wherein the three-dimensional coordinate system respectively draws a historical building model reserved in the building historical design database and a preset attribute label of the design in the three-dimensional coordinate system in a coordinate point mode according to a building area, a building height and a building cost which are X, Y, Z axes;
step S23: determining a main search feature and a corresponding floating range, wherein the main search feature is one of building area, building height and building cost, and the search length is determined based on a first formula, and the first formula is as follows:
wherein lambda is 1 For the numerical value of the main retrieval feature, alpha is a floating percentage, g is a scale of the corresponding coordinate axis under unit length, and the preset attribute label of the design is used as a circle center to search for the lengthDrawing a search ball in a three-dimensional coordinate system, acquiring coordinate points positioned in the search ball, and acquiring a corresponding historical building model based on the coordinate points;
step S24: calculating the score of each historical building model in the search result based on a second formula, wherein the second formula is as follows: delta= (lambda) 1 -A)×ω 1 +(λ 2 -B)×ω 2 Wherein A is the numerical value of the main retrieval feature in the historical building model, lambda 2 For the sum of the values of the two search features except the main search feature in the preset attribute tag, B is the sum of the values of the two search features except the main search feature in the historical building model, omega 1 、ω 2 And when the search results are displayed, the scores of the historical building models are displayed in sequence.
Further, after the first search is completed, if no search result is obtained, scaling the other two coordinate axis lengths and scales in the three-dimensional coordinate system except for the main search feature, and searching again, if no search result is still obtained, scaling the other two coordinate axis lengths and scales except for the main search feature again, and repeating the steps until the search result is obtained.
Further, in the step S3, the setting of the reference point includes the following steps: the reference points comprise a main base point and a sub base point, the main base point is independent of the completion model, the sub base points are in each sub structure of the completion model, the relative positions of the main base point and the sub base points are recorded, and when the second model is transmitted to the transit server, the completion model is restored based on the relative positions of the main base point and the sub base points.
Further, each of the substructures of each of the completion models includes a cost prediction table including a material name, a material unit price, a material use area, and a predicted total price for the substructures, and when the design terminal performs fine modification of the substructures in the completion model, the cost prediction table automatically acquires material information of the modified structure and updates the predicted total price of the cost prediction table based on the material information.
The invention also provides a building design system based on BIM technology, which is used for realizing the building design method based on BIM technology, and mainly comprises the following steps:
the database server is used for storing a building restriction information database and a building historical design database;
the input module is used for inputting the address information of the current building planning land;
the design terminal is used for designing the modified model, each design terminal comprises a design label, each substructure of the completion model corresponds to one design label, and the completion model modifies the completion model based on the design label of the design terminal;
the retrieval module is used for acquiring building design limiting conditions from the building limiting information database based on the address of the current building planning land, and retrieving a historical building model for acquiring requirements from the building historical design database based on the acquired building design limiting conditions, building cost, building area, building height and preset building cost;
the transfer server is used for eliminating the building main body structure in the first model to obtain a second model, marking the second model based on the IP address of each design terminal and uploading the second model to the cloud server;
the cloud server is used for receiving the second models transmitted by the transit server, the building main body structure is stored in the cloud server, the building main body structure and each second model are placed in an overlapping mode based on a reference point, an integrated model is obtained, and whether interference parts exist in the integrated model is detected.
Compared with the prior art, the invention has the following beneficial effects:
in the process of designing the completion model by the design units, the models designed by the design units are uploaded to the cloud server at fixed time intervals, and overlapping comparison is carried out in the cloud server, so that interference parts of the BIM models of the units can be found early, and related designers can be reminded of timely carrying out communication modification; before overlapping, the BIM models can be quickly moved to the designated positions for comparison by setting the reference points, so that accuracy of overlapping comparison is improved.
Drawings
FIG. 1 is a flow chart of steps of a building design method based on BIM technology;
fig. 2 is a system architecture diagram of a building design method based on the BIM technology of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another element. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of the present application.
As shown in fig. 1, a building design method based on the BIM technology includes,
step S1: building a building restriction information database and a building historical design database, wherein the building restriction information database contains building design restriction conditions of each region, the building historical design database comprises historical building models which are designed completely, each historical building model is provided with an attribute tag, and the attribute tag comprises building area, building height and building cost;
building restriction information database is constructed to collect the construction restriction information set by administrative departments in each region, wherein the construction restriction information comprises construction height restriction, distance of a construction back-off line, unit area cost restriction and the like, and after a planning land block of a building is obtained, the corresponding restriction information can be directly and rapidly extracted from the database, so that the preparation workload in the early stage of construction is reduced; the historical building model can better reflect the overall situation of the building by selecting the building area, the building height and the building cost as attribute tags, and the building area in the invention is the sum of the areas of all floors in the building.
Step S2: determining an address of a current building planning land and a preset attribute tag of a building, acquiring corresponding building design limiting conditions from a building limiting information database based on the address of the current planning land, searching in a building historical design database based on the acquired building design limiting conditions and the building area, building height and building cost in the preset attribute tag to obtain a searching result, selecting one historical building model from the searching result as a reference model, modifying the reference model based on actual demands of a user to obtain a completion model, dividing the completion model into a main structure and a plurality of substructures, wherein each substructures corresponds to one design terminal, and different design terminals are positioned in different design units;
specifically, the built model is an initial model comprising a building main structure and a plurality of substructures, the substructures in the built model are relatively rough shape structures, and after the built model is formed, each design unit needs to refine the substructures on the basis of the built model so as to meet the actual requirements of engineering.
By taking the attribute tag as a retrieval feature to retrieve in a building historical design database, the historical building model displayed in the retrieval result is attached to the current building design on the whole design, and on the basis, the most suitable historical building model is selected from the retrieval result to serve as a reference model.
Step S3: setting a reference point in a virtual space where a completion model exists, fixing the relative position between the completion model and the reference point, modifying the completion model by a cloud server to obtain a plurality of modification models, wherein each modification model corresponds to one design terminal, the modification models comprise a main body structure of the completion model and a substructure which corresponds to the design terminal and needs to be perfected, the cloud server distributes the modification models to the design terminals, the design terminals modify the completion model to obtain a first model, and in the completion model modification process by the design terminals, the first model is transmitted to a transfer server at fixed time intervals, and the transfer server eliminates the building main body structure in the first model to obtain a second model;
the initial position of the completion model can be positioned by setting the reference point, and after the completion model moves, the position of the completion model can be reset based on the reference point; before distributing the completion model to the design terminals of all the design units, the cloud server firstly acquires the design unit to which the design terminal belongs, then deletes the substructure which is not responsible for the design unit in the completion model, and only retains the main structure of the completion model and the substructure which needs to be responsible for the design, thereby reducing the file size of the completion model and improving the file transmission efficiency; meanwhile, more unnecessary structures do not exist in the completion model received by the design terminal, and the completion model is convenient to modify by the designer.
Because each design department can not modify the building main body, before the transfer server uploads the model to the cloud server, the size of the file occupied by the built model is further reduced by deleting the building main body structure in the first model. The first model is intensively processed in the transfer server, so that each design terminal does not need to process the first model by itself, and the resource occupation of each design terminal is reduced; further, the transmitted first model is stored in the transfer server, and when the file in the design terminal is accidentally lost, the file can be retrieved from the transfer server; in the process of transmitting the transfer server to the cloud server, as the transmitted file is the processed second model, even if the transmitted file is intercepted, the interceptor cannot obtain the completed model due to the lack of the building main body, so that the leakage of the whole model is avoided.
Step S4: the transit server marks the second models based on the IP addresses of the design terminals and uploads the second models to the cloud server, the building main body structure is stored in the cloud server, the cloud server overlaps the building main body structure and the second models based on the reference points to obtain an integrated model, the cloud server detects whether interference parts exist in the integrated model, and if yes, the integrated model obtains the second models related to the interference parts, designs the design terminals of the models based on the mark indexes of the second models, and sends interference warning notification to the indexed design terminals;
the designed first model is transmitted to the transit server at fixed time intervals, so that model overlapping comparison of each substructure is continuously carried out in the cloud server, and conflict interference parts among the structures are found early; because the transfer server marks the second model based on the IP addresses of the design terminals, when interference occurs, the second model can trace back the IP addresses based on the interference occurring parts, so that warning notification is sent to the corresponding design terminals.
Step S5: and each design terminal modifies the second model with interference until no interference occurs in the integrated model.
In the process of designing the completion model by the design units, the models designed by the design units are uploaded to the cloud server at fixed time intervals, and overlapping comparison is carried out in the cloud server, so that interference parts of the BIM models of the units can be found early, and related designers can be reminded of timely carrying out communication modification; before overlapping, the BIM models can be quickly moved to the designated positions for comparison by setting the reference points, so that accuracy of overlapping comparison is improved.
In the process of searching the historical building model data, as three search features are all numerical features, if the numerical values of the search features are identical as search conditions, it is difficult to obtain search results in a historical building model database; in order to ensure that a search result can be obtained, the traditional search mode is to set values of three search features and a allowed floating range of each value respectively, and then search a historical building model with the values of the three features all located in or partially located in the floating range in the historical building model data based on the values, however, because the building height, the building area and the building cost are different, the search mode needs to have higher engineering construction experience by search personnel, otherwise, because the value floating range of the three search features is not properly set, a better search result can be obtained by adjusting the values for a plurality of times, the invention provides the following search mode:
step S21: removing the historical building model which does not meet the limiting conditions of the building design in a building historical design database;
before searching, based on obtaining the limit information from the building limit information database, eliminating the historical building model which does not meet the limit information from the building historical design database, thereby reducing the data volume corresponding to the searching task and improving the searching speed.
Step S22: establishing a three-dimensional coordinate system, wherein the three-dimensional coordinate system respectively draws a historical building model reserved in a building historical design database and a preset attribute label of the design in a coordinate point form in the three-dimensional coordinate system according to the building area, the building height and the building cost as X, Y, Z axes;
step S23: determining main search characteristics and corresponding floating ranges, wherein the main search characteristics are one of building area, building height and building cost, and determining search length based on a first formula, and the first formula is as follows:
wherein lambda is 1 The method comprises the steps of drawing a search ball in a three-dimensional coordinate system by taking a preset attribute label of the design as a circle center and the search length as a radius, obtaining coordinate points in the search ball, and obtaining a corresponding historical building model based on the coordinate points, wherein alpha is the numerical value of a main search feature, g is the floating percentage, g is the scale of a corresponding coordinate axis under the unit length;
specifically, the scale of each coordinate axis unit length of the three-dimensional coordinate system is preset, a user firstly determines a main search feature before searching, determines the numerical fluctuation range of the main search feature by inputting a floating percentage, then inputs the specific numerical values of each of the other two search features, and the system automatically substitutes the numerical values of the main search feature into a first formula to calculate so as to obtain a search length, for example, the main search feature is a building area, the numerical value is 20000 square meters, the floating percentage is 5%, the scale of each 1 cm is 500 square meters, and then the search length is calculated based on the first formula; because the historical building model and the preset attribute label are drawn in the three-dimensional coordinate system in the form of coordinate points, when searching is performed, the search ball is generated by taking the coordinate points of the preset attribute label as circle centers and the search length as radius, and the historical building model in the three-dimensional coordinate system positioned in the search ball can be output as a search result.
Step S24: calculating the score of each historical building model in the search result based on a second formula, wherein the second formula is as follows: delta= (lambda) 1 -A)×ω 1 +(λ 2 -B)×ω 2 Wherein A is the numerical value of the main retrieval feature in the historical building model, lambda 2 For the sum of the values of the two search features except the main search feature in the preset attribute tag, B is the sum of the values of the two search features except the main search feature in the historical building model, omega 1 、ω 2 And when the search results are displayed, the scores of the historical building models are displayed in sequence.
Specifically, omega 1 ＞ω 2 Scoring each historical building model in the search result through a second formula, wherein the score is a penalty, namely the larger the difference value between each search feature of the historical building model and the search feature in the preset attribute label is, the higher the score is, and then the later the position in the search result is; through the step, after the retrieval result is obtained, the retrieval result is scored through the second formula, and the historical building model with lower score meets the requirements of usersThe historical building model with lower score is found and has higher rank in the system, so that the user can conveniently screen.
When the building data in the historical building database is too small, a proper target cannot be obtained only by one search, and the basic data such as building area, building height, building cost and the like are required to be adjusted for many times, so that the invention provides the following steps for further improving the convenience of search:
after the first search is completed, if the search result is not obtained, scaling the lengths and scales of the other two coordinate axes except the length and scales of the other two coordinate axes representing the main search feature in the three-dimensional coordinate system, and searching again, if the search result is not obtained, scaling the lengths and scales of the other two coordinate axes except the length and scales of the other two coordinate axes representing the main search feature again, and repeating the steps until the search result is obtained.
When the search result does not appear, the historical buildings with different cost are close to the target building under the condition of not changing the original search data by scaling the coordinate axis, so that the search result appears, and the building area and the building height are similar to the original search target.
In step S3, setting the reference point includes the steps of: the reference points include a main base point and a sub base point, the main base point being independent of the as built model, the sub base points being within respective sub structures of the as built model, the relative positions of the main base point and the sub base points being recorded, and the as built model being restored based on the relative positions of the main base point and the sub base points when the second model is transmitted to the transit server.
Through setting up a plurality of sub-base points in the completion model, when the position of all sub-base points corresponds with the relative position and the distance of main base point, the system confirms that completion model is located initial position, and this step resets completion model through the multiple spot combination to further promote folding inspection's accuracy.
Each substructure of each completion model includes a cost prediction table including a material name, a material unit price, a material use area, and a predicted total price for the substructure, and when the design terminal performs fine modification of the substructure in the completion model, the cost prediction table automatically acquires material information of the modified structure, and updates the predicted total price of the cost prediction table based on the material information.
Because the historical building model comprises the cost prediction table, when a designer modifies the historical building model, the designer synchronizes the modification part in the model of the cost prediction table and obtains the price of the corresponding material from the database, thereby updating the building cost of the structure and facilitating the designer to quickly evaluate the engineering cost of the design structure.
The invention also provides a building design system based on BIM technology, which is used for realizing the building design method based on BIM technology, and mainly comprises the following steps:
the database server stores a building restriction information database and a building historical design database;
the input module is used for inputting the address information of the current building planning land;
the design terminal is used for designing the modified model, each design terminal comprises a design label, each substructure of the completion model corresponds to one design label, and the completion model modifies the completion model based on the design label of the design terminal;
the retrieval module is used for acquiring building design limiting conditions in the building limiting information database based on the address of the current building planning land, and retrieving a historical building model for acquiring requirements in the building historical design database based on the acquired building design limiting conditions, building cost, building area, building height and preset building cost;
the transfer server is used for eliminating the building main body structure in the first model to obtain a second model, marking the second model based on the IP address of each design terminal and uploading the second model to the cloud server;
the cloud server is used for receiving the second models transmitted by the transit server, storing the building main body structure, overlapping the building main body structure and each second model based on the reference point, obtaining an integrated model, and detecting whether interference parts exist in the integrated model.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of computer programs, which may be stored on a non-transitory computer readable storage medium, and which, when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and for brevity, all of the possible combinations of the technical features of the above embodiments are not described, however, they should be considered as the scope of the description of the present specification as long as there is no contradiction between the combinations of the technical features.
The foregoing examples have been presented to illustrate only a few embodiments of the invention and are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. A building design method based on BIM technology, comprising:
step S1: building a building restriction information database and a building historical design database, wherein the building restriction information database contains building design restriction conditions of each region, the building historical design database comprises historical building models which are designed completely, each historical building model is provided with an attribute label, and the attribute labels comprise building areas, building heights and building cost;
step S2: determining an address of a current building planning land and a preset attribute tag of a building, acquiring corresponding building design limiting conditions from the building limiting information database based on the address of the current planning land, searching in the building historical design database based on the acquired building design limiting conditions and the building area, building height and building cost in the preset attribute tag as searching characteristics to obtain a searching result, selecting one historical building model from the searching result as a reference model, modifying the reference model based on actual requirements of a user to obtain a completion model, dividing the completion model into a main structure and a plurality of substructures, wherein each substructures corresponds to one design terminal, and different design terminals are positioned in different design units;
step S3: setting a reference point in a virtual space where a completion model exists, fixing the relative position between the completion model and the reference point, modifying the completion model by a cloud server to obtain a plurality of modification models, wherein each modification model corresponds to one design terminal, the modification models comprise a main body structure of the completion model and a substructure which corresponds to the design terminal and needs to be perfected, the cloud server distributes the modification models to each design terminal, each design terminal modifies the completion model to obtain a first model, and in the completion model modification process of the design terminal, the first model is transmitted to a transfer server at fixed time intervals, and the transfer server rejects building main body structures in the first model to obtain a second model;
step S4: the transit server marks the second models based on the IP addresses of the design terminals and uploads the second models to a cloud server, a building main body structure is stored in the cloud server, the cloud server overlaps the building main body structure and the second models based on reference points to obtain an integrated model, and if the integrated model has interference parts, the cloud server obtains the second models related to the interference parts, designs the design terminals of the models based on the marked indexes of the second models and sends interference warning notification to the indexed design terminals;
step S5: and each design terminal modifies the second model with interference until no interference occurs in the integrated model.
2. The building design method based on the BIM technology according to claim 1, wherein in the step S2, the searching in the building history design database includes the steps of:
step S21: removing the historical building model which does not meet the limiting conditions of the building design in the building historical design database;
step S22: establishing a three-dimensional coordinate system, wherein the three-dimensional coordinate system respectively draws a historical building model reserved in the building historical design database and a preset attribute label of the design in the three-dimensional coordinate system in a coordinate point mode according to a building area, a building height and a building cost which are X, Y, Z axes;
step S23: determining a main search feature and a corresponding floating range, wherein the main search feature is one of building area, building height and building cost, and the search length is determined based on a first formula, and the first formula is as follows:
wherein lambda is 1 The method comprises the steps that for the numerical value of a main retrieval feature, alpha is a floating percentage, g is a scale of a corresponding coordinate axis under unit length, a preset attribute label designed at the time is used as a circle center, a search length is used as a radius, a retrieval ball is drawn in a three-dimensional coordinate system, coordinate points in the retrieval ball are obtained, and a corresponding historical building model is obtained based on the coordinate points;
step S24: calculating the score of each historical building model in the search result based on a second formula, wherein the second formula is as follows: delta= (lambda) 1 -A)×ω 1 +(λ 2 -B)×ω 2 Wherein A is the numerical value of the main retrieval feature in the historical building model, lambda 2 For the sum of the values of the two search features except the main search feature in the preset attribute tag, B is the sum of the values of the two search features except the main search feature in the historical building model, omega 1 、ω 2 And when the search results are displayed, the scores of the historical building models are displayed in sequence.
3. The building design method based on the BIM technology according to claim 2, wherein after the first search is completed, if no search result is obtained, scaling the other two coordinate axis lengths and scales in the three-dimensional coordinate system except for the one representing the main search feature, and searching again, if no search result is still obtained, scaling the other two coordinate axis lengths and scales except for the one representing the main search feature again, and repeating the above steps until a search result is obtained.
4. The building design method based on the BIM technology according to claim 1, wherein in the step S3, the setting of the reference point includes the steps of: the reference points comprise a main base point and a sub base point, the main base point is independent of the completion model, the sub base points are in each sub structure of the completion model, the relative positions of the main base point and the sub base points are recorded, and when the second model is transmitted to the transit server, the completion model is restored based on the relative positions of the main base point and the sub base points.
5. A building design method based on BIM technology according to claim 4, wherein each sub-structure of each built model includes a cost prediction table including a material name, a material unit price, a material use area, and a predicted total price for the sub-structure, and when the design terminal performs fine modification of the sub-structure in the built model, the cost prediction table automatically acquires material information of the modified structure and updates the predicted total price of the cost prediction table based on the material information.
6. A building design system based on the BIM technology for realizing the building design method based on the BIM technology as claimed in any one of claims 1 to 5, comprising
The database server is used for storing a building restriction information database and a building historical design database;
the input module is used for inputting the address information of the current building planning land;
the design terminal is used for designing the modified model, each design terminal comprises a design label, each substructure of the completion model corresponds to one design label, and the completion model modifies the completion model based on the design label of the design terminal;
the retrieval module is used for acquiring building design limiting conditions from the building limiting information database based on the address of the current building planning land, and retrieving a historical building model for acquiring requirements from the building historical design database based on the acquired building design limiting conditions, building cost, building area, building height and preset building cost;
the transfer server is used for eliminating the building main body structure in the first model to obtain a second model, marking the second model based on the IP address of each design terminal and uploading the second model to the cloud server;
the cloud server is used for receiving the second models transmitted by the transit server, the building main body structure is stored in the cloud server, the building main body structure and each second model are placed in an overlapping mode based on a reference point, an integrated model is obtained, and whether interference parts exist in the integrated model is detected.
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