A project simulation construction deduction method based on BIM technology

Abstract

The present invention discloses a project simulation construction deduction method based on BIM technology, comprising the following steps: Step 1: After identity authentication, the user logs in to the simulation construction deduction system, and performs simulation construction deduction after logging in; Step 2: The user imports project construction related data, and the system simulates the construction process through BIM technology to obtain preliminary construction duration information; Step 3: After the construction simulation is completed, the user imports surrounding building information, processes the surrounding building information to obtain environmental impact parameters; Step 4: After the construction process simulation, the carbon emission data of the project construction process is estimated to obtain construction carbon emission data; Step 5: The constructed building model is subjected to fire condition simulation to obtain fire simulation parameters. The present invention can make the project simulated construction deduction by this method more secure and more usable, making the method more worthy of promotion and use.

Description

Technical Field

[0001] The present invention relates to the field of project simulation, and in particular to a project simulation construction simulation method based on BIM technology. Background Art

[0002] BIM technology, or Building Information Modeling, is a new tool for architecture, engineering, and civil engineering. It describes computer-aided design (CAD) that uses 3D graphics and is object-oriented, related to architecture.

[0003] BIM technology is also used in the process of project simulation and construction deduction. Before construction, BIM technology is used to conduct project simulation and construction deduction to obtain construction models and related parameter information.

[0004] In the existing BIM technology for project simulation and construction deduction, the model data obtained in the recommendation process has large deviations in the actual construction process, which will lead to problems such as low safety of construction projects, and has a certain impact on the use of BIM technology in project simulation and construction deduction. Therefore, a project simulation and construction deduction method based on BIM technology is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the existing BIM technology is used in project simulation construction deduction, the model data obtained in the recommendation process has large deviations in the actual construction process, and the safety of the construction project is low. A project simulation construction deduction method based on BIM technology is provided.

[0006] The present invention solves the above technical problems through the following technical solutions, which include the following steps:

[0007] Step 1: After identity verification, the user logs in to the construction simulation system and conducts construction simulation after logging in;

[0008] Step 2: The user imports project construction related data, and the system simulates the construction process using BIM technology to obtain preliminary construction duration information;

[0009] Step 3: After the construction simulation is completed, the user imports the surrounding building information and processes the surrounding building information to obtain environmental impact parameters;

[0010] Step 4: After simulating the construction process, estimate the carbon emissions data of the project construction process to obtain the construction carbon emissions data;

[0011] Step 5: Simulate the fire condition of the constructed building model and obtain the fire simulation parameters;

[0012] Step 6: Import the environmental impact parameters into the database, calculate the estimated delay duration, process the estimated delay duration to obtain the actual delay duration, and process the actual delay duration to obtain the first construction rectification information;

[0013] Step 7: Import the fire simulation parameters and construction carbon emission data into the database and process them to obtain the second construction rectification information;

[0014] Step 8: After obtaining the first construction rectification information and the second construction rectification information, make corresponding rectifications to the construction process according to the actual fire simulation parameters, construction carbon emission data and construction environment information and re-construct the project simulation.

[0015] Furthermore, the specific process of identity authentication in step one is as follows: the user enters the account number and password, the user's username and password are transmitted to the server, and the server verifies whether the username and password are consistent with the password of this user on the server. If the verification is consistent, the verification is passed; otherwise, the verification fails. When the consecutive verification failures exceed the preset number of times, a verification alarm message is generated. At the same time, the username is transmitted in plain text during the transmission process, and the password information is encrypted and transmitted.

[0016] Furthermore, the encryption process of the encryption method is as follows: first, the number of digits in the password is obtained, the password is an odd number of digits, the middle password character is used as the symmetrical position, and the two sides of the symmetrical position are symmetrically swapped in order of distance from the symmetrical position to obtain a preliminary encrypted password, and then the two ends of the preliminary password are added with preset symbols to obtain a secondary encrypted password, and finally the SHA256 hash algorithm is used to perform the secondary encryption to obtain the final encrypted password;

[0017] The decryption key is set on the server.

[0018] Furthermore, the surrounding building information in step 3 includes information on the number of residential buildings within a preset range of the construction site and information on the number of schools within a preset range of the construction site;

[0019] The specific process of processing the surrounding building information to obtain the environmental impact parameters is as follows: a basic environmental score G is set, and then the number of residential buildings within the preset range of the construction site is extracted and marked as Y, and the number of schools within the preset range of the construction site is extracted and marked as P. When Y is greater than a preset value, its score is a preset value a1, when Y is within the preset value range, its score is a preset value a2, when Y is less than the preset value, its score is a preset value a3, a1>a2>a3>0, when P is greater than the preset value, its score is a preset value b1, when P is within the preset value range, its score is a preset value b2, when P is less than the preset value, its score is a preset value b3, b1>b2>b3>0;

[0020] In order to highlight the importance of P, a correction value L1 is now assigned to Y, and a correction value L2 is assigned to P, L2>L1, L2+L1=1, and the preliminary parameter Yp is obtained through the formula Y*L1+P*L2=Yp. Then, the sum of the basic environmental score G and the preliminary parameter Yp is calculated to obtain the environmental impact parameter Gy.

[0021] Furthermore, the construction carbon emission data acquisition process in step four is as follows: first determine the comprehensive carbon emission quota in the construction process, the comprehensive carbon emission quota includes the carbon emission factor database of various carbon sources in the construction process of the construction project, the resource input standard of each quota sub-item, the carbon source consumption standard and the carbon emission standard, and then implant the comprehensive carbon emission quota of the construction project into the three-dimensional virtual model of BIM technology, and then perform construction plan simulation, engineering quantity measurement, resource input determination, carbon source consumption determination, database storage, data output and input call, detection feedback in the construction process of the three-dimensional virtual model, and then calculate the total carbon emissions of the construction, that is, the construction carbon emission data.

[0022] Furthermore, the specific process of performing the fire simulation in step five is as follows: importing multiple fire models, performing simulation operations on the fire models, obtaining multiple fire simulation results, and processing the fire simulation results to obtain fire simulation parameters.

[0023] Furthermore, the fire model includes:

[0024] Empirical model: The empirical model is a mathematical model based on experimental data and experience, which is composed of the empirical model of experimental research or the simplified semi-empirical model plus important thermophysical property data;

[0025] Regional model: The regional model includes single-region model and dual-region model. It divides the confined space into different regions and assumes that the state parameters in each region are uniform and consistent. The exchange of mass and energy only occurs between regions, between regions and boundaries, and between them and the fire source. The regional model usually divides the room into two control volumes: the upper hot smoke layer and the lower cold air layer.

[0026] Field model: Fire field simulation research divides the building space into numerous control units. Each control unit is assumed to have the same physical parameters. Computers are used to solve various parameters during the fire process, including velocity, temperature, spatial distribution of component concentrations, and their changes over time.

[0027] Field mixed model: The field model is a computer simulation of the fire process in a complex multi-room building. It uses field simulation methods to study the burning rooms or strong flow areas, and uses regional simulation methods for other non-burning and non-strong flow areas.

[0028] Furthermore, the specific process of processing the fire simulation results to obtain the fire simulation parameters is as follows:

[0029] S1: Extract multiple fire simulation results obtained, including the speed of fire occurrence, the area of fire development and spread, and the smoke concentration information generated by the fire;

[0030] S2: The speed of fire occurrence is marked as V, the area of fire development and spread is marked as F, and the smoke concentration information generated by the fire is marked as R;

[0031] S3: Set the fire occurrence speed score Qv, which is inversely proportional to the fire occurrence speed V. The faster V is, the greater Qv is, and vice versa.

[0032] S4: Set the fire development and spread area score Qf, which is proportional to the fire development and spread area F. The larger the fire development and spread area F, the greater Qf is, and vice versa.

[0033] S5: Set the smoke concentration score Qr generated by the fire. The smoke concentration information generated by the fire is proportional to the smoke concentration information R generated by the fire. The larger the smoke concentration information R generated by the fire, the larger Qr is, and vice versa.

[0034] S6: At this time, the sum of the fire occurrence speed score Qv, the fire development and spread area score Qf and the smoke concentration score Qr generated by the fire is calculated to obtain the total fire score Qq 和 ;

[0035] S7: Calculate the total fire score Qq of multiple fire models 和 The average value of the fire simulation parameter Qq is obtained 均 .

[0036] Furthermore, the environmental impact parameters are imported into the database, the estimated delay duration is calculated, and then the estimated delay duration is processed to obtain the actual delay duration: the estimated construction duration information, preliminary construction duration information and environmental impact parameters are extracted, the preliminary construction duration information is marked as W1, and the environmental impact parameters are marked as W2. By calculating W1*W2-W1=Ww1, the actual delay duration Ww1 is obtained, and the estimated construction duration information is marked as W3. By using the formula W3-(W1+Ww1)=Ww2, the actual delay duration is obtained.

[0037] Compared with the existing technology, the present invention has the following advantages: the project simulation construction deduction method based on BIM technology can understand the factors that may affect the construction progress by collecting environmental information around the construction site during the simulation construction deduction process. After obtaining the data, the project simulation construction recommendation is re-performed, and the actual completion time can be more accurately deduced, thereby ensuring the rationality of the subsequent planned construction time. After the simulation construction is completed, a carbon emission assessment is carried out. After understanding the carbon emissions during the construction process, the simulation construction is re-performed according to the actual carbon emissions to reduce the carbon emissions after the actual construction and achieve environmentally friendly construction. At the same time, a fire simulation of the model is also carried out. After the building simulation is completed, a fire simulation is performed using a fire model to understand the fire resistance of the building. After the data is generated, the project simulation construction is re-performed according to the fire data, so that the fire resistance of the building processed by the actual construction is stronger. Through the above settings, the project simulation construction deduction by this method can be made safer and more usable, making this method more worthy of promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0039] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0040] like Figure 1 As shown, this embodiment provides a technical solution: a project simulation construction deduction method based on BIM technology, comprising the following steps:

[0041] Step 1: After identity verification, the user logs in to the construction simulation system and conducts construction simulation after logging in;

[0042] Step 2: The user imports project construction related data, and the system simulates the construction process using BIM technology to obtain preliminary construction duration information;

[0043] Step 3: After the construction simulation is completed, the user imports the surrounding building information and processes the surrounding building information to obtain environmental impact parameters;

[0044] Step 4: After simulating the construction process, estimate the carbon emissions data of the project construction process to obtain the construction carbon emissions data;

[0045] Step 5: Simulate the fire condition of the constructed building model and obtain the fire simulation parameters;

[0046] Step 6: Import the environmental impact parameters into the database, calculate the estimated delay duration, process the estimated delay duration to obtain the actual delay duration, and process the actual delay duration to obtain the first construction rectification information;

[0047] Step 7: Import the fire simulation parameters and construction carbon emission data into the database and process them to obtain the second construction rectification information;

[0048] Step 8: After obtaining the first construction rectification information and the second construction rectification information, the construction process is rectified accordingly according to the actual fire simulation parameters, construction carbon emission data and construction environment information, and the project simulation construction is re-performed;

[0049] The present invention collects environmental information around the construction site during the simulation construction deduction process, and can understand the factors that may affect the construction progress. After obtaining the data, the project simulation construction recommendation is re-performed, and the actual completion time can be deduced more accurately, thereby ensuring the rationality of the subsequent planned construction time. After the simulation construction is completed, a carbon emission assessment is carried out. After understanding the carbon emissions during the construction process, the simulation construction is re-performed according to the actual carbon emissions to reduce the carbon emissions after the actual construction and achieve environmentally friendly construction. At the same time, a fire simulation of the model is also carried out. After the building simulation is completed, a fire simulation is carried out using a fire model to understand the fire resistance of the building. After the data is generated, the project simulation construction is re-performed according to the fire data, so that the fire resistance of the building processed by the actual construction is stronger. Through the above settings, the project simulation construction deduction by this method can be made safer and more available, making this method more worthy of promotion and use.

[0050] The specific process of identity authentication in step one is as follows: the user enters the account number and password, the user's username and password are transmitted to the server, and the server verifies whether the username and password are consistent with the password of the user on the server. If the verification is consistent, the verification is passed, otherwise the verification fails. When the consecutive verification failures exceed the preset number of times, a verification alarm message is generated. At the same time, the username is transmitted in plain text during the transmission process, and the password information is encrypted and transmitted by the encryption method. The encryption process of the encryption method is as follows: first obtain the password bit information, the password is an odd number of bits, and the middle password character is used as the symmetrical position. The two sides of the symmetrical position are symmetrically swapped in order of distance from the symmetrical position to obtain a preliminary encrypted password. Then, preset symbols are added to both ends of the preliminary password to obtain a secondary encrypted password. Finally, the SHA256 hash algorithm is used to encrypt the secondary password to obtain the final encrypted password;

[0051] The decryption key is set on the server;

[0052] Through the above process, the user's identity authentication can be carried out when the user logs in to the simulation construction deduction system. After the identity authentication is passed, the data upload and download are allowed. This setting can effectively ensure the security of user data and effectively prevent the user data from being stolen. The setting of multiple encryption algorithms further improves the security of user accounts and passwords.

[0053] The surrounding building information in step 3 includes the number of residential buildings within the preset range of the construction site and the number of schools within the preset range of the construction site;

[0054] The specific process of processing the surrounding building information to obtain the environmental impact parameters is as follows: a basic environmental score G is set, and then the number of residential buildings within the preset range of the construction site is extracted and marked as Y, and the number of schools within the preset range of the construction site is extracted and marked as P. When Y is greater than a preset value, its score is a preset value a1, when Y is within the preset value range, its score is a preset value a2, when Y is less than the preset value, its score is a preset value a3, a1>a2>a3>0, when P is greater than the preset value, its score is a preset value b1, when P is within the preset value range, its score is a preset value b2, when P is less than the preset value, its score is a preset value b3, b1>b2>b3>0;

[0055] In order to highlight the importance of P, a correction value L1 is now assigned to Y, and a correction value L2 is assigned to P. L2>L1, L2+L1=1, and the preliminary parameter Yp is obtained by the formula Y*L1+P*L2=Yp. Then, the sum of the basic environmental score G and the preliminary parameter Yp is calculated to obtain the environmental impact parameter Gy.

[0056] Through the above process, the number of residential buildings and schools around the construction site can be obtained. When there are more residential buildings or schools around the construction site, the number of construction stoppages due to complaints about construction noise will be higher. By collecting this data, we can understand the data that affects the construction progress that cannot be obtained in the project simulation construction deduction. Then, the data can be imported into the system for re-deduction to obtain more reasonable project simulation construction data.

[0057] The process of obtaining the construction carbon emission data in step 4 is as follows: first, determine the comprehensive carbon emission quota during the construction process. The comprehensive carbon emission quota includes a carbon emission factor database of various carbon sources during the construction process of the construction project, resource input standards for each quota sub-item, carbon source consumption standards, and carbon emission standards. Then, the comprehensive carbon emission quota of the construction project is implanted into a three-dimensional virtual model using BIM technology. Then, during the construction of the three-dimensional virtual model, construction plan simulation, engineering quantity measurement, resource input determination, carbon source consumption determination, database storage, data input and output call, detection feedback are performed, and then the total carbon emissions of the construction, i.e., the construction carbon emission data, are calculated.

[0058] Through the above process, the estimated carbon emission information of the construction process can be obtained. By processing the carbon emission information, it can be understood whether it meets the carbon emission standards. The data is then imported into the project simulation construction deduction for re-deduction to obtain a construction process that is more in line with the actual carbon emission standards.

[0059] The specific process of performing fire simulation in step 5 is as follows: importing multiple fire models, performing simulation operations on the fire models, obtaining multiple fire simulation results, and processing the fire simulation results to obtain fire simulation parameters; the fire models include:

[0060] Empirical model: The empirical model is a mathematical model based on experimental data and experience, which is composed of the empirical model of experimental research or the simplified semi-empirical model plus important thermophysical property data;

[0061] Regional model: The regional model includes single-region model and dual-region model. It divides the confined space into different regions and assumes that the state parameters in each region are uniform and consistent. The exchange of mass and energy only occurs between regions, between regions and boundaries, and between them and the fire source. The regional model usually divides the room into two control volumes: the upper hot smoke layer and the lower cold air layer.

[0062] Field model: Fire field simulation research divides the building space into numerous control units. Each control unit is assumed to have the same physical parameters. Computers are used to solve various parameters during the fire process, including velocity, temperature, spatial distribution of component concentrations, and their changes over time.

[0063] Field-area hybrid model: The field model is a computer simulation of the fire process in a complex multi-room building. It uses field simulation methods to study the burning room or strong flow area, and uses regional simulation methods for other non-burning and non-strong flow areas.

[0064] Through the above process, a fire simulation is performed after the deduction is completed, which can help us understand the protection effect of the deduced building type. In addition, the setting of multiple fire models can obtain more simulation data of fire conditions, and the reference value of the obtained data is greater.

[0065] The specific process of processing the fire simulation results to obtain the fire simulation parameters is as follows:

[0066] S1: Extract multiple fire simulation results obtained, including the speed of fire occurrence, the area of fire development and spread, and the smoke concentration information generated by the fire;

[0067] S2: The speed of fire occurrence is marked as V, the area of fire development and spread is marked as F, and the smoke concentration information generated by the fire is marked as R;

[0068] S3: Set the fire occurrence speed score Qv, which is inversely proportional to the fire occurrence speed V. The faster V is, the greater Qv is, and vice versa.

[0069] S4: Set the fire development and spread area score Qf, which is proportional to the fire development and spread area F. The larger the fire development and spread area F, the greater Qf is, and vice versa.

[0070] S5: Set the smoke concentration score Qr generated by the fire. The smoke concentration information generated by the fire is proportional to the smoke concentration information R generated by the fire. The larger the smoke concentration information R generated by the fire, the larger Qr is, and vice versa.

[0071] S6: At this time, the sum of the fire occurrence speed score Qv, the fire development and spread area score Qf and the smoke concentration score Qr generated by the fire is calculated to obtain the total fire score Qq 和 ;

[0072] S7: Calculate the total fire score Qq of multiple fire models 和 The average value of the fire simulation parameter Qq is obtained 均 ;

[0073] Through the above process, more accurate fire simulation parameter information can be obtained, which can facilitate subsequent re-deduction.

[0074] The environmental impact parameters are imported into the database, and the estimated delay duration is calculated. The estimated delay duration is then processed to obtain the actual delay duration: the estimated construction duration information, preliminary construction duration information, and environmental impact parameters are extracted, the preliminary construction duration information is marked as W1, and the environmental impact parameters are marked as W2. By calculating W1*W2-W1=Ww1, the actual delay duration Ww1 is obtained. The estimated construction duration information is then marked as W3, and the actual delay duration is obtained by the formula W3-(W1+Ww1)=Ww2;

[0075] Through the above process, a more accurate actual delay duration can be calculated and imported into the simulation system, so that the simulation system can deduce more accurate project construction data.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0077] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A project simulation construction deduction method based on BIM technology, characterized in that: The following steps are involved: Step 1: After identity verification, the user logs in to the construction simulation system and conducts construction simulation after logging in; Step 2: The user imports project construction related data, and the system simulates the construction process using BIM technology to obtain preliminary construction duration information; Step 3: After the construction simulation is completed, the user imports the surrounding building information and processes the surrounding building information to obtain environmental impact parameters; Step 4: After simulating the construction process, estimate the carbon emissions data of the project construction process to obtain the construction carbon emissions data; Step 5: Simulate the fire condition of the constructed building model and obtain the fire simulation parameters; Step 6: Import the environmental impact parameters into the database, calculate the estimated delay duration, process the estimated delay duration to obtain the actual delay duration, and process the actual delay duration to obtain the first construction rectification information; Step 7: Import the fire simulation parameters and construction carbon emission data into the database and process them to obtain the second construction rectification information; Step 8: After obtaining the first construction rectification information and the second construction rectification information, the construction process is rectified accordingly according to the actual fire simulation parameters, construction carbon emission data and construction environment information, and the project simulation construction is re-performed; The surrounding building information in step 3 includes the number of residential buildings within the preset range of the construction site and the number of schools within the preset range of the construction site; The specific process of processing the surrounding building information to obtain the environmental impact parameters is as follows: a basic environmental score G is set, and then the number of residential buildings within the preset range of the construction site is extracted and marked as Y, and the number of schools within the preset range of the construction site is extracted and marked as P. When Y is greater than a preset value, its score is a preset value a1, when Y is within the preset value range, its score is a preset value a2, when Y is less than the preset value, its score is a preset value a3, a1>a2>a3>0, when P is greater than the preset value, its score is a preset value b1, when P is within the preset value range, its score is a preset value b2, when P is less than the preset value, its score is a preset value b3, b1>b2>b3>0; In order to highlight the importance of P, a correction value L1 is now assigned to Y, and a correction value L2 is assigned to P. L2>L1, L2+L1=1, and the preliminary parameter Yp is obtained through the formula Y*L1+P*L2=Yp. Then, the sum of the basic environmental score G and the preliminary parameter Yp is calculated to obtain the environmental impact parameter Gy. The process of obtaining the construction carbon emission data in step 4 is as follows: first, determine the comprehensive carbon emission quota during the construction process. The comprehensive carbon emission quota includes a carbon emission factor database of various carbon sources during the construction process of the construction project, resource input standards for each quota sub-item, carbon source consumption standards, and carbon emission standards. Then, the comprehensive carbon emission quota of the construction project is implanted into a three-dimensional virtual model using BIM technology. Then, during the construction of the three-dimensional virtual model, construction plan simulation, engineering quantity measurement, resource input determination, carbon source consumption determination, database storage, data input and output call, detection feedback are performed, and then the total carbon emissions of the construction, i.e., the construction carbon emission data, are calculated. The specific process of performing the fire simulation in step 5 is as follows: importing multiple fire models, performing simulation operations on the fire models, obtaining multiple fire simulation results, and processing the fire simulation results to obtain fire simulation parameters; The fire model includes: Empirical model: The empirical model is a mathematical model based on experimental data and experience, which is composed of the empirical model of experimental research or the simplified semi-empirical model plus important thermophysical property data; Regional model: The regional model includes single-region model and dual-region model. It divides the confined space into different regions and assumes that the state parameters in each region are uniform and consistent. The exchange of mass and energy only occurs between regions, between regions and boundaries, and between them and the fire source. The regional model usually divides the room into two control volumes: the upper hot smoke layer and the lower cold air layer. Field model: Fire field simulation research divides the building space into numerous control units. Each control unit is assumed to have the same physical parameters. Computers are used to solve various parameters during the fire process, including velocity, temperature, spatial distribution of component concentrations, and their changes over time. Field-area hybrid model: The field model is a computer simulation of the fire process in a complex multi-room building. It uses field simulation methods to study the burning room or strong flow area, and uses regional simulation methods for other non-burning and non-strong flow areas. The specific process of processing the fire simulation results to obtain the fire simulation parameters is as follows: S1: Extract multiple fire simulation results obtained, including the speed of fire occurrence, the area of fire development and spread, and the smoke concentration information generated by the fire; S2: The speed of fire occurrence is marked as V, the area of fire development and spread is marked as F, and the smoke concentration information generated by the fire is marked as R; S3: Set the fire occurrence speed score Qv, which is proportional to the fire occurrence speed V. The faster V is, the greater Qv is, and vice versa. S4: Set the fire development and spread area score Qf, which is proportional to the fire development and spread area F. The larger the fire development and spread area F, the greater Qf is, and vice versa. S5: Set the smoke concentration score Qr generated by the fire. The smoke concentration information generated by the fire is proportional to the smoke concentration information R generated by the fire. The larger the smoke concentration information R generated by the fire, the larger Qr is, and vice versa. S6: At this time, the sum of the fire occurrence speed score Qv, the fire development and spread area score Qf and the smoke concentration score Qr generated by the fire is calculated to obtain the total fire score Qq 和 ; S7: Calculate the total fire score Qq of multiple fire models 和 The average value of the fire simulation parameter Qq is obtained 均 .

2. The project simulation construction deduction method based on BIM technology according to claim 1 is characterized by: The specific process of identity authentication in step one is as follows: the user enters the account number and password, the user's username and password are transmitted to the server, and the server verifies whether the username and password are consistent with the password of this user on the server. If the verification is consistent, the verification is passed, otherwise the verification fails. When the consecutive verification fails exceed the preset number of times, a verification alarm message is generated. At the same time, the username is transmitted in plain text during the transmission process, and the password information is encrypted and transmitted.

3. The project simulation construction deduction method based on BIM technology according to claim 2 is characterized by: The encryption process of the encryption method is as follows: first, the number of password digits is obtained. If the password is an odd number of digits, the middle password character is used as the symmetrical position, and the two sides of the symmetrical position are symmetrically swapped in order of distance from the symmetrical position to obtain a preliminary encrypted password. Then, a preset symbol is added to both ends of the preliminary password to obtain a secondary encrypted password. Finally, the SHA256 hash algorithm is used to encrypt the secondary password to obtain the final encrypted password. The decryption key is set on the server.

4. The project simulation construction deduction method based on BIM technology according to claim 1 is characterized by: The environmental impact parameters are imported into the database, and the estimated delay duration is calculated, and then the estimated delay duration is processed to obtain the actual delay duration: the estimated construction duration information, preliminary construction duration information and environmental impact parameters are extracted, the preliminary construction duration information is marked as W1, and the environmental impact parameters are marked as W2. By calculating W1*W2-W1=Ww1, the actual delay duration Ww1 is obtained, and then the estimated construction duration information is marked as W3. The actual delay duration is obtained by the formula W3-(W1+Ww1)=Ww2.

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