Building water supply and drainage pipeline design method and system based on BIM technology

Abstract

The invention discloses a building water supply and drainage pipeline design method and system based on a BIM technology, and relates to the field of pipeline laying. Building data information with the same use function is collected, expected building water flow information is obtained, and various types of pipeline assembly information and pipeline noise coefficients are collected according to building expected design requirements; a pipeline model and a pipe fitting model are established, according to expected building water flow information and pipeline model parameters, a pipeline noise expression index is obtained, a low-noise pipeline is determined, water flow passing through the pipeline is simulated, pipeline interface stable parameters are obtained, pipeline interface information is generated, and the pipeline interface information is obtained by combining the expected building three-dimensional model and the pipeline model corresponding to the low-noise pipeline. The method comprises the following steps: acquiring available position information and assembly priority of a low-noise pipeline, simulating pipeline noise of each available position based on a BIM technology, determining optimal pipeline position information, and combining the optimal pipeline position information, the assembly priority, the low-noise pipeline and pipeline interface information to generate a pipeline design scheme.

Description

Technical Field

[0001] The present invention relates to the field of pipeline layout, and in particular to a method and system for designing building water supply and drainage pipelines based on BIM technology. Background Art

[0002] BIM technology, or building information modeling technology, is a comprehensive technical means based on digital three-dimensional models. By integrating various information within the construction project cycle into a three-dimensional information database, it enables all parties involved to work together on the same platform. Building water supply and drainage pipelines are pipelines used in construction projects to transport and distribute domestic water, production water, and collect and discharge domestic sewage, industrial wastewater and rainwater.

[0003] Traditional drawings cannot visually present the three-dimensional spatial relationship between water supply and drainage pipes and building structures, making it difficult to adjust the position of water supply and drainage pipes in a timely manner when the building layout changes. Traditional design methods fail to take into account the compatibility of pipe materials and water flow velocity, as well as the impact of the preset space size of the pipe on noise, resulting in frequent collisions between water flow and pipe walls, causing noise, and the sound of water flow inside the building to continue to reverberate, seriously interfering with the quality of life of users. When faced with complex pipe design drawings, some subtle but critical design errors may be overlooked, such as mismatched pipe connection methods, which in turn leads to rework or incorrect installation of pipe installation during construction, delaying the construction period and increasing construction costs. Summary of the invention

[0004] In order to solve the above technical problems, a building water supply and drainage pipeline design method and system based on BIM technology are provided. The technical solution solves the problem that the adaptation relationship between pipeline material and water flow velocity proposed in the above background technology is insufficient, resulting in frequent collisions between water flow and pipe wall to generate noise, causing the sound of water flow inside the building to continue to echo, seriously interfering with the quality of life of users and neglecting some subtle but critical design errors, resulting in rework or incorrect installation of pipeline installation during construction.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A design method for building water supply and drainage pipelines based on BIM technology, comprising:

[0007] Obtain the expected design requirements of the building, extract the characteristic data of the expected building, and establish a three-dimensional model of the expected building based on BIM technology;

[0008] Analyze the expected design requirements of the building, clarify the use function of the building, collect data information of buildings with the same use function, and record it as sample building information;

[0009] Obtain expected building water flow information based on expected building design requirements and sample building information;

[0010] Collect data information of common pipeline components, obtain the noise coefficient of each type of pipeline, establish pipeline models and pipe fitting models through BIM technology, and generate corresponding pipeline model parameters;

[0011] According to the expected building water flow information, the noise coefficient of each type of pipeline and the pipeline model parameters, the pipeline noise performance index is obtained to determine the low-noise pipeline;

[0012] According to the expected building water flow information, the water flow through the pipeline is simulated, the pipeline interface stability parameters are obtained, and the pipeline interface information is generated;

[0013] Combine the expected building 3D model, the pipe model corresponding to the low-noise pipe, and the pipe interface information to perform collision detection and obtain the available position information and assembly priority of the low-noise pipe;

[0014] Combining the pipeline interface information and the available position information of the low-noise pipeline, the pipeline noise at each available position is simulated to determine the optimal pipeline position information;

[0015] Generate a pipeline design plan based on the preferred pipeline location information, assembly priority, low-noise pipeline and pipeline interface information.

[0016] Preferably, the obtaining of expected building water flow information specifically includes:

[0017] Pre-process the sample building information to obtain sample size information and sample flow information;

[0018] According to the building water scenario, the sample flow information can be classified into water supply flow and drainage flow;

[0019] Based on the classification results of sample traffic information, data processing is performed to obtain the average value, peak value and time distribution information of each type of traffic;

[0020] Collect historical precipitation data on per capita water flow demand and expected building locations to generate stormwater flow data;

[0021] According to the expected design requirements of the building, the expected population data, floor data and area data of the building are analyzed, and the floor water flow weight coefficient and area water flow weight coefficient are obtained by combining the sample building information;

[0022] Combine the sample building information and the time distribution information of each type of flow to obtain the seasonal condition water flow weight coefficient and the water flow distribution coefficient of the daily cycle time;

[0023] Obtain the expected water flow of the building based on the expected population data, floor data, area data, seasonal water flow weight coefficient and daily water flow distribution coefficient of the building;

[0024] The average value, peak value, time distribution information of each type of flow and the expected building water flow are collectively referred to as expected building water flow information;

[0025] The specific calculation formula for the expected building water flow is:

[0026]

[0027] Where Q(t) represents the expected water flow of the building, P represents the expected number of users of the building, and k people represents the per capita water flow demand, A represents the total area of ​​the expected building, k area represents the area water flow weight coefficient, L represents the number of floors of the expected building, k floors represents the floor water flow weight coefficient, F represents the average total value of each type of flow in a year, k season represents the seasonal conditional water flow weight coefficient, n represents the total number of water flow distribution points during the daily cycle, α i It represents the data corresponding to the i-th water flow distribution point within the daily cycle time, and C represents the rainwater flow data.

[0028] Preferably, obtaining the noise coefficients of various types of pipelines and determining the low-noise pipelines specifically includes:

[0029] According to the pipeline model parameters, obtain the material information and pipeline diameter information of each type of pipeline;

[0030] Combine the expected building water flow and the water flow distribution coefficient at different times of the day to obtain the Reynolds number of the water flow at each time state;

[0031] According to the Reynolds number of the water flow at each time state, the flow velocity of the water at each time state is obtained;

[0032] According to the expected design requirements of the building, obtain the sound absorption coefficient of various types of building materials, the preset space dimensions of water supply and drainage pipes, and building material information;

[0033] Based on the data information of pipeline components, the surface roughness of each type of pipeline material is obtained, and the friction factor of each type of pipeline is obtained by combining the pipeline diameter information and the Reynolds number of water flow under different time states;

[0034] Combined with the preset spatial dimensions of the water supply and drainage pipelines, the building material information, the friction factors of various types of pipelines, and the noise coefficients of various types of pipelines, the noise performance relationship of each pipeline is obtained;

[0035] According to the characteristic data of the expected building, obtain the height of each floor from the ground;

[0036] Substitute the height of each floor from the ground into the noise performance equation of each pipeline, obtain and analyze the noise performance of each pipeline on each floor, and determine the low-noise pipelines at different heights of the building;

[0037] Among them, the specific calculation formula of pipeline friction factor is:

[0038]

[0039] In the formula, f represents the friction factor of the pipeline, ε represents the surface roughness of the pipeline, D represents the inner diameter of the pipeline, and Re represents the Reynolds number of the water flow;

[0040] The noise performance relationship of the pipeline is specifically as follows:

[0041]

[0042] In the formula, R represents the noise performance index of the pipeline, f represents the friction factor of the pipeline, H represents the height of the pipeline from the ground, v represents the flow velocity of the water in the pipeline, S represents the preset space volume of the pipeline, and K pipe represents the noise coefficient of the pipe, and β represents the sound absorption coefficient of the building material.

[0043] Preferably, the step of obtaining the pipeline interface stability parameter and generating the pipeline interface information specifically includes:

[0044] According to the pipeline model corresponding to the low-noise pipeline, the geometric feature data of the low-noise pipeline is determined, and compared with the pipeline interface to obtain the geometric interface similarity of the pipe fittings;

[0045] Analyze the model parameters of the pipeline components to obtain the elastic modulus of each material pipe fitting and the outer diameter of each low-noise pipeline;

[0046] Through BIM software, based on the data information of pipeline components and the expected building water flow information, the speed of water flowing through the pipeline interface is simulated to obtain the pipeline displacement, the pressure on the pipeline interface and the flow smoothness;

[0047] According to the use function of the building, determine the structural hierarchy priority of the water supply and drainage pipelines, and obtain the weight value corresponding to each structural hierarchy;

[0048] The pipeline interface stability parameters are obtained by combining the geometric interface similarity of the pipe fittings, the displacement of the pipe, the weight values ​​corresponding to each structural level, the elastic modulus of each material pipe fitting, the pressure bearing capacity and the flow smoothness;

[0049] According to the size of the pipeline interface sealing stability parameters, select the optimal pipe fittings, and generate pipeline interface information in combination with the pipeline component data information;

[0050] Among them, the specific calculation formula of pipeline interface stability parameters is:

[0051]

[0052] In the formula, δ seal represents the elastic modulus of the pipe interface, V represents the speed of water flowing through the pipe interface, and t seal Indicates the thickness of the pipe interface, ΔL indicates the displacement of the pipe, and D resem represents the geometric similarity of the pipeline interface, N represents the pressure of the pipeline interface, M represents the flow smoothness, ∈1, ∈2 and ∈3 represent the weight values ​​corresponding to each structural level, respectively, and D pipe Indicates the outer diameter of the low noise pipe.

[0053] Preferably, the obtaining of the available position information and assembly priority of the low-noise pipeline specifically includes:

[0054] According to the modeling software and pipeline model parameters, boundary warning lines are set on the surface of the expected building 3D model and the low-noise pipeline model;

[0055] The expected building 3D model is divided into internal spaces according to floor data, and low-noise pipes are arranged in vertical space according to the corresponding building height information;

[0056] According to the floor data of the expected building three-dimensional model, a low-noise pipeline model of the corresponding floor is obtained;

[0057] Based on BIM software, the expected building 3D model and the low-noise pipe model on the same floor are placed in the same space, and the low-noise pipe model is traversed and placed in the expected building 3D model. If the boundary warning lines of the expected building 3D model and the low-noise pipe model intersect or overlap, the traversal result data is marked as abnormal data. If the boundary warning lines of the expected building 3D model and the low-noise pipe model do not overlap, the traversal result data is marked as available data, and the available data traversal results in each space are obtained to generate the available location information of the low-noise pipes on each floor.

[0058] Based on available data and pipeline interface information, simulate the connection between pipelines and pipe fittings to obtain available pipeline connection process information;

[0059] The installation steps in the available pipeline connection process information are split and reorganized, and the reorganized installation steps are simulated to obtain the time required for the reorganized installation steps and determine the assembly priority.

[0060] Preferably, simulating the pipeline noise at each available position to determine the preferred pipeline position information specifically includes:

[0061] Simulate pipe water flow based on expected building water flow, average value, peak value and time distribution information of various types of flow;

[0062] According to the pipeline interface information and the available location information of the low-noise pipeline, simulate the overall structural layout of the low-noise pipeline in the building;

[0063] Through BIM software, combined with the overall structural layout of low-noise pipes in the building and simulated pipe water flow, the pipe noise of low-noise pipes at various available locations is obtained;

[0064] Divide the internal areas of the building according to the expected design requirements of the building and obtain the pipeline access points on each floor;

[0065] The preferred pipeline location information is determined by combining the corridor access points on each floor and the pipeline noise of the low-noise pipeline at each available position.

[0066] Furthermore, a building water supply and drainage pipeline design system based on BIM technology is proposed, which is used to implement any of the above-mentioned design methods, including:

[0067] A data acquisition module, which is used to collect common pipeline component data, building data information, surface friction corresponding to pipeline materials and noise coefficients of various types of pipelines, and transmit the collected data to the data integration module;

[0068] A data integration module, which is used to analyze the data, including extracting expected building feature data, obtaining expected building water flow information, generating pipeline model parameters, matching degree of connection ports of each low-noise pipeline, and transmitting the data to the model generation module, the simulation module and the conflict detection module;

[0069] A model generation module, which is used to generate a corresponding model using the BIM technology from the received data information, annotate the model parameters, and transmit the generated model data to the simulation module and the pipeline layout module;

[0070] A simulation module, which is used to deduce the received data and obtain all deduction results based on given conditions;

[0071] A pipeline layout module, which is used to generate a reasonable pipeline connection layout through the pipeline model and pipe fitting model transmitted by the model generation module, and transmit the data to the scheme design module;

[0072] A conflict detection module, which is used to determine whether there is a conflict between the building and the pipeline through the boundary warning lines set on the surfaces of the expected building three-dimensional model and the low-noise pipeline model, mark the data results according to the judgment results, and transmit the data to the scheme design module;

[0073] The scheme design module is used to integrate and analyze the received data and generate a pipeline design scheme.

[0074] Optionally, the data integration module specifically includes:

[0075] A first data integration unit, the first data integration unit is used to analyze the expected design requirements of the building, sample building information, and time distribution information of various types of flow, obtain the expected population data of the building, floor data, area data, floor water flow weight coefficient, area water flow weight coefficient, seasonal condition water flow weight coefficient, water flow distribution coefficient of daily cycle time, and obtain expected building water flow information;

[0076] A second data integration unit, the second data integration unit is used to analyze the expected design requirements of the building, extract the characteristic data of the expected building, analyze the data information of the pipeline components, generate pipeline model parameters, and transmit the data to the model generation module;

[0077] A third data integration unit, the third data integration module is used to analyze the data information of the low-noise pipeline and the pipeline assembly, generate the matching degree of the connection port of each low-noise pipeline, and transmit the data to the simulation module;

[0078] Optionally, the simulation module specifically includes:

[0079] A first simulation module, wherein the first simulation module is used to simulate the vertical arrangement of low-noise pipes corresponding to each floor, simulate the connection between pipes and pipe interfaces, generate an available pipe connection process, split and reorganize specific steps of the available pipe connection process, and simulate the reorganized connection process;

[0080] The second simulation module is used to simulate the pipeline water flow through the expected building water flow information, combined with the available position information of the low-noise pipeline, simulate the pipeline noise generated by the water flow passing through the low-noise pipelines at each available position, and transmit the data to the scheme design module.

[0081] Optionally, the conflict detection module specifically includes:

[0082] A space detection unit, which is used to analyze the space data, generate available space area data and pipeline occupied space data, determine whether the space data overlaps or intersects, and transmit the data to the boundary warning unit and the data marking unit;

[0083] A boundary warning unit, the boundary warning unit is used to process the received data, record the outer layer of the spatial data as boundary data, assign a warning attribute to the boundary data, and transmit the data back to the spatial detection unit;

[0084] The data labeling unit is used to label the data according to the judgment result of the space detection unit. If the judgment result is that overlap or intersection occurs, the data is labeled as abnormal data. If the judgment result is that no overlap or intersection occurs, the data is labeled as normal data.

[0085] Compared with the prior art, the present invention has the following beneficial effects:

[0086] The present invention proposes a building water supply and drainage pipeline design method and system based on BIM technology. According to the expected design requirements of the building, an expected building three-dimensional model is established, the use function of the building is clarified, the building data information with the same use function is collected, the expected building water flow information is obtained, the information of various types of pipeline components and the pipeline noise coefficient are collected, and a pipeline model and a pipe fitting model are established. According to the expected building water flow information and pipeline model parameters, the pipeline noise performance index is obtained, the low-noise pipeline is determined, the water flow passing through the pipeline is simulated, the pipeline interface stability parameters are obtained, the pipeline interface information is generated, and the low-noise pipeline is obtained by combining the expected building three-dimensional model and the pipeline model corresponding to the low-noise pipeline. Based on the available position information and assembly priority of the noisy pipe, the pipe noise at each available position is simulated based on BIM technology to determine the preferred pipe position information. The pipe design scheme is generated by combining the preferred pipe position information, assembly priority, low-noise pipes and pipe interface information. In this way, the adaptation relationship between pipe material and water flow velocity and the influence of the preset space size of the pipe on noise are fully considered. According to the noise performance relationship of the pipe and the characteristic data of the expected building, the low-noise pipe can be accurately assigned to the number of floors of the building. The pipe interface information is obtained through the stable parameters of the pipe interface, which improves the matching degree of the pipe connection method and reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 A flow chart of the building water supply and drainage pipeline design method based on BIM technology proposed by the present invention;

[0088] Figure 2 A step diagram of the method for determining a low-noise pipeline in the present invention;

[0089] Figure 3 A step diagram of the method for obtaining pipeline interface information in the present invention;

[0090] Figure 4 This is a step diagram of the method for determining the preferred pipeline location information in the present invention;

[0091] Figure 5 This is the result diagram of the building water supply and drainage pipeline design system based on BIM technology proposed in this invention. DETAILED DESCRIPTION

[0092] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0093] Reference Figure 1 As shown, a building water supply and drainage pipeline design method based on BIM technology includes:

[0094] Obtain the expected design requirements of the building, extract the characteristic data of the expected building, and establish a three-dimensional model of the expected building based on BIM technology;

[0095] Analyze the expected design requirements of the building, clarify the use function of the building, collect data information of buildings with the same use function, and record it as sample building information;

[0096] Obtain expected building water flow information based on expected building design requirements and sample building information;

[0097] Collect data information of common pipeline components, obtain the noise coefficient of each type of pipeline, establish pipeline models and pipe fitting models through BIM technology, and generate corresponding pipeline model parameters;

[0098] According to the expected building water flow information, the noise coefficient of each type of pipeline and the pipeline model parameters, the pipeline noise performance index is obtained to determine the low-noise pipeline;

[0099] According to the expected building water flow information, the water flow through the pipeline is simulated, the pipeline interface stability parameters are obtained, and the pipeline interface information is generated;

[0100] Combine the expected building 3D model, the pipe model corresponding to the low-noise pipe, and the pipe interface information to perform collision detection and obtain the available position information and assembly priority of the low-noise pipe;

[0101] Combining the pipeline interface information and the available position information of the low-noise pipeline, the pipeline noise at each available position is simulated to determine the optimal pipeline position information;

[0102] Generate a pipeline design plan based on the preferred pipeline location information, assembly priority, low-noise pipeline and pipeline interface information.

[0103] According to the expected design requirements of the building, this scheme collects building data information with the same use function, obtains the expected building water flow information, collects information on various types of pipeline components and pipeline noise coefficients, establishes pipeline models and pipe fitting models, obtains pipeline noise performance indexes according to the expected building water flow information and pipeline model parameters, determines low-noise pipelines, simulates water flow through pipelines, obtains pipeline interface stability parameters, generates pipeline interface information, and combines the expected building three-dimensional model and the pipeline model corresponding to the low-noise pipeline to obtain the available position information and assembly priority of the low-noise pipeline. Based on BIM technology, the pipeline noise at each available position is simulated to determine the preferred pipeline position information. Combining the preferred pipeline position information, assembly priority, low-noise pipeline and pipeline interface information, a pipeline design scheme is generated. In this way, the adaptation relationship between pipeline material and water flow velocity and the influence of the preset space size of the pipeline on noise are fully considered. According to the pipeline noise performance relationship and combined with the characteristic data of the expected building, the low-noise pipeline can be accurately assigned to the number of building floors. Through the pipeline interface stability parameters, the pipeline interface information is obtained, the matching degree of the pipe fitting connection method is improved, the project cycle is shortened, and the construction cost is effectively reduced.

[0104] Furthermore, the expected building water flow information is obtained, including:

[0105] Pre-process the sample building information to obtain sample size information and sample flow information;

[0106] According to the building water scenario, the sample flow information can be classified into water supply flow and drainage flow;

[0107] Based on the classification results of sample traffic information, data processing is performed to obtain the average value, peak value and time distribution information of each type of traffic;

[0108] Collect historical precipitation data on per capita water flow demand and expected building locations to generate stormwater flow data;

[0109] According to the expected design requirements of the building, the expected population data, floor data and area data of the building are analyzed, and combined with the sample building information, the floor water flow weight coefficient and the area water flow weight coefficient are obtained. The floor water flow weight coefficient can be obtained by the ratio of the water flow of each floor in the sample building information to the total water flow, and the area water flow weight coefficient can be obtained by the ratio of the water flow of each floor area in the sample building information to the total water flow;

[0110] Combine the sample building information and the time distribution information of each type of flow to obtain the seasonal condition water flow weight coefficient and the water flow distribution coefficient of the daily cycle time;

[0111] Obtain the expected water flow of the building based on the expected population data, floor data, area data, seasonal water flow weight coefficient and daily water flow distribution coefficient of the building;

[0112] The average value, peak value, time distribution information of each type of flow and the expected building water flow are collectively referred to as expected building water flow information;

[0113] The specific calculation formula for the expected building water flow is:

[0114]

[0115] Where Q(t) represents the expected water flow of the building, P represents the expected number of users of the building, and k people represents the per capita water flow demand, A represents the total area of ​​the expected building, k area represents the area water flow weight coefficient, L represents the number of floors of the expected building, k floors represents the floor water flow weight coefficient, F represents the average total value of each type of flow in a year, k season represents the seasonal conditional water flow weight coefficient, n represents the total number of water flow distribution points during the daily cycle, α i It represents the data corresponding to the i-th water flow distribution point within the daily cycle time, and C represents the rainwater flow data.

[0116] It can be understood that the water flow in the water supply and drainage pipes includes water supply and drainage, among which the drainage includes water supply and precipitation. The specific water flow of the building is affected by time and seasonal factors. The water flow data of the expected building cannot be directly obtained through historical data. It is necessary to analyze the data information of buildings with the same usage functions, obtain the floor water flow weight coefficient and the area water flow weight coefficient, and perform weighted processing based on the expected design requirements of the building to obtain the water flow of the expected building. The sample building information is divided into water supply flow and drainage flow for data processing, and the average, peak and time distribution information of each type of flow are obtained. The data accuracy is ensured by comparing the drainage flow and water supply flow data.

[0117] Reference Figure 2 As shown, the noise coefficients of various types of pipelines are obtained and low-noise pipelines are determined, including:

[0118] According to the pipeline model parameters, obtain the material information and pipeline diameter information of each type of pipeline;

[0119] Combined with the expected flow parameters of the water supply system and drainage system of the building, the Reynolds number of the water flow at each time state is obtained;

[0120] According to the Reynolds number of the water flow at each time state, the flow velocity of the water at each time state is obtained;

[0121] According to the expected design requirements of the building, obtain the sound absorption coefficient of various types of building materials, the preset space information of water supply and drainage pipes, and the building material information;

[0122] Based on the data information of pipeline components, the surface roughness of each type of pipeline material is obtained, and the friction factor of each type of pipeline is obtained by combining the pipeline diameter information and the Reynolds number of water flow under different time states;

[0123] Combined with the preset spatial dimensions of the water supply and drainage pipelines, the building material information, the friction factors of various types of pipelines, and the noise coefficients of various types of pipelines, the noise performance relationship of each pipeline is obtained;

[0124] According to the characteristic data of the expected building, obtain the height of each floor from the ground;

[0125] Substitute the height of each floor from the ground into the noise performance equation of each pipeline, obtain and analyze the noise performance of each pipeline on each floor, and determine the low-noise pipelines at different heights of the building;

[0126] Among them, the specific calculation formula of pipeline friction factor is:

[0127]

[0128] In the formula, f represents the friction factor of the pipeline, ε represents the surface roughness of the pipeline, D represents the inner diameter of the pipeline, and Re represents the Reynolds number of the water flow;

[0129] The noise performance relationship of the pipeline is as follows:

[0130]

[0131] In the formula, R represents the noise performance index of the pipeline, f represents the friction factor of the pipeline, H represents the height of the pipeline from the ground, v represents the flow velocity of the water in the pipeline, S represents the preset space volume of the pipeline, and K pipe represents the noise coefficient of the pipe, and β represents the sound absorption coefficient of the building material.

[0132] It can be understood that the Reynolds number is an indicator used to judge the flow state of a fluid and is used to describe the flow state of water fluid in a drainage pipe. The surface roughness of the pipe indicates the microscopic unevenness of the inner surface of the pipe. The pipe friction factor indicates the parameter of the energy level generated by the water flow in the pipe due to the collision with the pipe when it flows. The noise coefficient of the pipe is a parameter that measures the ability of the pipe to generate noise due to energy. The water flow state in the water supply and drainage pipe is turbulent. The water flow calculation formula under turbulent state can be used to obtain the flow velocity of water under various time states. Combined with the surface roughness of various types of pipe materials and pipe diameter information, the noise coefficient of various types can be obtained. The friction factor of the pipeline. When designing a building, the space for laying the pipeline will be reserved according to the scale of the building. The degree of propagation of the noise generated by the pipeline in the building can be obtained through the preset spatial volume of the pipeline and the sound absorption coefficient of the building material. Combined with the height of the pipeline above the ground, the flow rate of water in the pipeline and the friction factor of the pipeline, the relationship between the noise performance of the pipeline and the height of the pipeline above the ground can be generated. By analyzing the height of each floor above the ground, the specific value of the noise performance of each type of pipeline on each floor can be obtained. By comparing the specific values ​​of the noise performance of each type of pipeline on each floor, the pipeline with a smaller specific value of noise performance will be used as the low-noise pipeline on that floor.

[0133] Reference Figure 3 As shown, the pipeline interface stability parameters are obtained and the pipeline interface information is generated, including:

[0134] According to the pipeline model corresponding to the low-noise pipeline, the geometric feature data of the low-noise pipeline is determined, and compared with the pipeline interface to obtain the geometric interface similarity of the pipe fittings;

[0135] Analyze the model parameters of the pipeline components to obtain the elastic modulus of each material pipe fitting and the outer diameter of each low-noise pipeline;

[0136] Through BIM software, based on the data information of pipeline components and the expected building water flow information, the speed of water flowing through the pipeline interface is simulated to obtain the pipeline displacement, the pressure on the pipeline interface and the flow smoothness;

[0137] According to the use function of the building, determine the structural hierarchy priority of the water supply and drainage pipelines, and obtain the weight value corresponding to each structural hierarchy;

[0138] The pipeline interface stability parameters are obtained by combining the geometric interface similarity of the pipe fittings, the displacement of the pipe, the weight values ​​corresponding to each structural level, the elastic modulus of each material pipe fitting, the pressure bearing capacity and the flow smoothness;

[0139] According to the size of the pipeline interface sealing stability parameters, select the optimal pipe fittings, and generate pipeline interface information in combination with the pipeline component data information;

[0140] Among them, the specific calculation formula of pipeline interface stability parameters is:

[0141]

[0142] In the formula, δ seal represents the elastic modulus of the pipe interface, V represents the speed of water flowing through the pipe interface, and t seal Indicates the thickness of the pipe interface, ΔL indicates the displacement of the pipe, and D resem represents the geometric similarity of the pipeline interface, N represents the pressure of the pipeline interface, M represents the flow smoothness, ∈1, ∈2 and ∈3 represent the weight values ​​corresponding to each structural level, respectively, and D pipe Indicates the outer diameter of the low noise pipe.

[0143] It can be understood that the pipeline interface stability parameter is an indicator used to evaluate the stability of the pipeline interface when it is impacted by water flow. The elastic modulus of the pipeline interface indicates the degree of deformation of the pipeline interface due to material limitations when it is impacted by unit water flow. The geometric similarity of the pipeline interface can be used to preliminarily confirm the sealing of the pipeline. The elastic modulus of the pipeline interface, the displacement of the pipeline, the thickness of the pipeline interface and the outer diameter of the low-noise pipeline can be used to further determine the sealing of the pipeline interface. According to the use function of the building, the structural hierarchy priority of the water supply and drainage pipeline can be determined. For residential buildings, the sealing of the pipeline interface is the first priority. The first priority is the flow smoothness, the second priority is the flow smoothness, and the pressure of the pipe interface is the third priority. In a house, once the water supply and drainage pipe leaks, it will directly affect the lives of residents. For example, if the interface of the sewage pipe in the bathroom is not well sealed, it will produce odor, and the leaked water may also penetrate into the residents downstairs, causing neighborhood disputes. The flow smoothness of the water supply and drainage pipes in the house mainly affects the comfort of water use and the smoothness of drainage. If the water flow in the water supply pipe is not smooth, it will affect the water experience of showering, washing, etc. The pressure of the water supply and drainage pipes in the house is relatively low, mainly the municipal water supply pressure or the secondary water supply pressure of the community, so the pipe interface pressure The importance of pressure is relatively lower than sealing and flow smoothness. For hospital buildings, the sealing of pipe interfaces is the first priority, the pressure of pipe interfaces is the second priority, and the flow smoothness is the third priority. Hospitals have extremely high requirements for sanitary environment. Leakage of water supply and drainage pipes may cause bacteria to grow, pollute the medical environment, affect the recovery of patients and the work of medical staff. Some special equipment in hospitals requires a higher water supply pressure, so the ability of pipe interfaces to withstand pressure is also very important. For chemical plant buildings, the pressure of pipe interfaces is the first priority, the sealing of pipe interfaces is the second priority, and the flow smoothness is the third priority. Pipes in chemical plants usually transport various high-temperature, high-pressure, corrosive liquids and gases. If the pipe interface cannot withstand pressure and ruptures, a large amount of dangerous chemicals will leak, causing serious explosions and poisoning accidents. Secondly, many substances transported by chemical pipelines are toxic, corrosive or flammable. Poor interface sealing will cause chemical leakage, pollute the environment, damage equipment, and even endanger the lives of personnel. In chemical production, although the smooth flow of fluids is also important to ensure the stability of the production process, its importance is slightly lower than the pressure bearing capacity and sealing of the pipe interface.

[0144] Furthermore, the available location information and assembly priority of the low-noise pipeline are obtained, including:

[0145] According to the modeling software and pipeline model parameters, boundary warning lines are set on the surface of the expected building 3D model and the low-noise pipeline model;

[0146] The expected building 3D model is divided into internal spaces according to floor data, and low-noise pipes are arranged in vertical space according to the corresponding building height information;

[0147] According to the floor data of the expected building three-dimensional model, a low-noise pipeline model of the corresponding floor is obtained;

[0148] Based on BIM software, the expected building 3D model and the low-noise pipe model on the same floor are placed in the same space, and the low-noise pipe model is traversed and placed in the expected building 3D model. If the boundary warning lines of the expected building 3D model and the low-noise pipe model intersect or overlap, the traversal result data is marked as abnormal data. If the boundary warning lines of the expected building 3D model and the low-noise pipe model do not overlap, the traversal result data is marked as available data, and the available data traversal results in each space are obtained to generate the available location information of the low-noise pipes on each floor.

[0149] Based on available data and pipeline interface information, simulate the connection between pipelines and pipe fittings to obtain available pipeline connection process information;

[0150] The installation steps in the available pipeline connection process information are split and reorganized, and the reorganized installation steps are simulated to obtain the time required for the reorganized installation steps and determine the assembly priority.

[0151] It is understandable that the connection methods of pipes are different due to the different types of pipes between different floors. Taking residential areas as an example, water supply pipes in low-rise residential areas mostly use the hot-melt connection method of PP-R pipes. For water supply pipes in high-rise residential buildings, steel-plastic composite pipes will be used, connected by grooves or flanges. The drainage pipes in low-rise residential areas use the socket connection of PVC-U pipes, and rubber sealing rings are used at the interfaces to ensure sealing. For drainage pipes in high-rise residential buildings, flexible connection methods of machine-made cast iron pipes are adopted. There will be different connection steps according to different connection methods. By splitting and reorganizing the connection steps, the simulation of the pipeline layout and connection process can be realized.

[0152] Reference Figure 4 As shown, the pipeline noise at each available position is simulated to determine the preferred pipeline position information, including:

[0153] Simulate pipe water flow based on expected building water flow, average value, peak value and time distribution information of various types of flow;

[0154] According to the pipeline interface information and the available location information of the low-noise pipeline, simulate the overall structural layout of the low-noise pipeline in the building;

[0155] Through BIM software, combined with the overall structural layout of low-noise pipes in the building and simulated pipe water flow, the pipe noise of low-noise pipes at various available locations is obtained;

[0156] Divide the internal areas of the building according to the expected design requirements of the building and obtain the pipeline access points on each floor;

[0157] The preferred pipeline location information is determined by combining the corridor access points on each floor and the pipeline noise of the low-noise pipeline at each available position.

[0158] It is understandable that by analyzing the expected design requirements of the building, the internal areas of the building can be divided. Taking the residential area as an example, it can be divided into the kitchen area, bathroom area and balcony area. The water supply pipe access point in the kitchen area is usually in the wall under the kitchen sink, and the drain pipe access point is usually located below the drain outlet at the bottom of the sink. The water supply pipe access point in the bathroom area is in the wall or under the ground near the bathroom washbasin, toilet, shower head and other water-using equipment, and the drain pipe access point is generally near the water supply pipe. The water supply pipe access point in the balcony area is generally in the wall near the washing machine, and the drain pipe access point is generally located below the drain outlet of the washing machine. The location information of the access points in each area and the pipe noise of the low-noise pipe at each available position are combined and compared, so as to screen out the location information of the preferred pipe.

[0159] Further, see Figure 5 As shown, a building water supply and drainage pipeline design system based on BIM technology is proposed, which is used to implement any of the above design methods, including:

[0160] A data acquisition module, which is used to collect common pipeline component data, building data information, surface friction corresponding to pipeline materials and noise coefficients of various types of pipelines, and transmit the collected data to the data integration module;

[0161] A data integration module, which is used to analyze the data, including extracting expected building feature data, obtaining expected building water flow information, generating pipeline model parameters, matching of connection ports of each low-noise pipeline, and transmitting the data to the model generation module, the simulation module and the conflict detection module;

[0162] A model generation module, which is used to generate a corresponding model using the BIM technology from the received data information, annotate the model parameters, and transmit the generated model data to the simulation module and the pipeline layout module;

[0163] A simulation module, which is used to deduce the received data and obtain all deduction results based on given conditions;

[0164] A pipeline layout module, which is used to generate a reasonable pipeline connection layout through the pipeline model and pipe fitting model transmitted by the model generation module, and transmit the data to the scheme design module;

[0165] A conflict detection module, which is used to determine whether there is a conflict between the building and the pipeline through the boundary warning lines set on the surfaces of the expected building three-dimensional model and the low-noise pipeline model, mark the data results according to the judgment results, and transmit the data to the scheme design module;

[0166] The scheme design module is used to integrate and analyze the received data and generate a pipeline design scheme.

[0167] Furthermore, the data integration module specifically includes:

[0168] A first data integration unit, the first data integration unit is used to analyze the expected design requirements of the building, sample building information, and time distribution information of various types of flow, obtain the expected population data of the building, floor data, area data, floor water flow weight coefficient, area water flow weight coefficient, seasonal condition water flow weight coefficient, water flow distribution coefficient of daily cycle time, and obtain expected building water flow information;

[0169] A second data integration unit, the second data integration unit is used to analyze the expected design requirements of the building, extract the characteristic data of the expected building, analyze the data information of the pipeline components, generate pipeline model parameters, and transmit the data to the model generation module;

[0170] A third data integration unit, the third data integration module is used to analyze the data information of the low-noise pipeline and the pipeline assembly, generate the matching degree of the connection port of each low-noise pipeline, and transmit the data to the simulation module;

[0171] Furthermore, the simulation module specifically includes:

[0172] A first simulation module, wherein the first simulation module is used to simulate the vertical arrangement of low-noise pipes corresponding to each floor, simulate the connection between pipes and pipe interfaces, generate an available pipe connection process, split and reorganize the specific steps of the available pipe connection process, and simulate the reorganized connection process;

[0173] The second simulation module is used to simulate the pipeline water flow through the expected building water flow information, combined with the available position information of the low-noise pipeline, simulate the pipeline noise generated by the water flow passing through the low-noise pipelines at each available position, and transmit the data to the scheme design module.

[0174] Furthermore, the conflict detection module specifically includes:

[0175] A space detection unit, which is used to analyze the space data, generate available space area data and pipeline occupied space data, determine whether the space data overlaps or intersects, and transmit the data to the boundary warning unit and the data marking unit;

[0176] A boundary warning unit, the boundary warning unit is used to process the received data, record the outer layer of the spatial data as boundary data, assign a warning attribute to the boundary data, and transmit the data back to the spatial detection unit;

[0177] The data labeling unit is used to label the data according to the judgment result of the space detection unit. If the judgment result is that overlap or intersection occurs, the data is labeled as abnormal data. If the judgment result is that no overlap or intersection occurs, the data is labeled as normal data.

[0178] In summary, the advantages of the present invention are: it fully considers the adaptation relationship between the pipe material and the water flow velocity and the influence of the preset space size of the pipe on the noise. According to the noise performance relationship of the pipe and combined with the characteristic data of the expected building, the low-noise pipe can be accurately assigned to the number of floors of the building. Through the stable parameters of the pipe interface, the pipe interface information is obtained, the matching degree of the pipe connection method is improved, and the construction cost is reduced.

[0179] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A building water supply and drainage pipeline design method based on BIM technology, characterized in that: include: Obtain the expected design requirements of the building, extract the characteristic data of the expected building, and establish a three-dimensional model of the expected building based on BIM technology; Analyze the expected design requirements of the building, clarify the use function of the building, collect data information of buildings with the same use function, and record it as sample building information; Obtain expected building water flow information based on expected building design requirements and sample building information; Collect data information of common pipeline components, obtain the noise coefficient of each type of pipeline, establish pipeline models and pipe fitting models through BIM technology, and generate pipeline component model parameters; According to the expected building water flow information, the noise coefficient of each type of pipeline and the pipeline model parameters, the pipeline noise performance index is obtained to determine the low-noise pipeline; According to the expected building water flow information, the water flow through the pipeline is simulated, the pipeline interface stability parameters are obtained, and the pipeline interface information is generated; Combine the expected building 3D model, the pipe model corresponding to the low-noise pipe, and the pipe interface information to perform collision detection and obtain the available position information and assembly priority of the low-noise pipe; Combining the pipeline interface information and the available position information of the low-noise pipeline, the pipeline noise at each available position is simulated to determine the optimal pipeline position information; Generate a pipeline design plan based on the preferred pipeline location information, assembly priority, low-noise pipeline and pipeline interface information.

2. A building water supply and drainage pipeline design method based on BIM technology according to claim 1, characterized in that: The obtaining of expected building water flow information specifically includes: Pre-process the sample building information to obtain sample size information and sample flow information; According to the building water scenario, the sample flow information can be classified into water supply flow and drainage flow; Based on the classification results of sample traffic information, data processing is performed to obtain the average value, peak value and time distribution information of each type of traffic; Collect historical precipitation data on per capita water flow demand and expected building locations to generate stormwater flow data; According to the expected design requirements of the building, the expected population data, floor data and area data of the building are analyzed, and the floor water flow weight coefficient and area water flow weight coefficient are obtained by combining the sample building information; Combine the sample building information and the time distribution information of each type of flow to obtain the seasonal condition water flow weight coefficient and the water flow distribution coefficient of the daily cycle time; Obtain the expected water flow of the building based on the expected population data, floor data, area data, seasonal water flow weight coefficient and daily water flow distribution coefficient of the building; The average value, peak value, time distribution information of each type of flow and the expected building water flow are collectively referred to as expected building water flow information; The specific calculation formula for the expected building water flow is: Where Q(t) represents the expected water flow of the building, P represents the expected number of users of the building, and k people represents the per capita water flow demand, A represents the total area of ​​the expected building, k area represents the area water flow weight coefficient, L represents the number of floors of the expected building, k floors represents the floor water flow weight coefficient, F represents the average total value of each type of flow in a year, k season represents the seasonal conditional water flow weight coefficient, n represents the total number of water flow distribution points during the daily cycle, α i It represents the data corresponding to the i-th water flow distribution point within the daily cycle time, and C represents the rainwater flow data.

3. A method for designing building water supply and drainage pipelines based on BIM technology according to claim 2, characterized in that: The step of obtaining the noise coefficients of various types of pipelines and determining low-noise pipelines specifically includes: According to the pipeline model parameters, obtain the material information and pipeline diameter information of each type of pipeline; Combine the expected building water flow and the water flow distribution coefficient at different times of the day to obtain the Reynolds number of the water flow at each time state; According to the Reynolds number of the water flow at each time state, the flow velocity of the water at each time state is obtained; According to the expected design requirements of the building, obtain the sound absorption coefficient of various types of building materials, the preset space dimensions of water supply and drainage pipes, and building material information; Based on the data information of pipeline components, the surface roughness of each type of pipeline material is obtained, and the friction factor of each type of pipeline is obtained by combining the pipeline diameter information and the Reynolds number of water flow under different time states; Combined with the preset spatial dimensions of the water supply and drainage pipelines, the building material information, the friction factors of various types of pipelines, and the noise coefficients of various types of pipelines, the noise performance relationship of each pipeline is obtained; According to the characteristic data of the expected building, obtain the height of each floor from the ground; Substitute the height of each floor from the ground into the noise performance equation of each pipeline, obtain and analyze the noise performance of each pipeline on each floor, and determine the low-noise pipelines at different heights of the building; Among them, the specific calculation formula of pipeline friction factor is: In the formula, f represents the friction factor of the pipeline, ε represents the surface roughness of the pipeline, D represents the inner diameter of the pipeline, and Re represents the Reynolds number of the water flow; The noise performance relationship of the pipeline is specifically as follows: In the formula, R represents the noise performance index of the pipeline, f represents the friction factor of the pipeline, H represents the height of the pipeline from the ground, v represents the flow velocity of the water in the pipeline, S represents the preset space volume of the pipeline, and K pipe represents the noise coefficient of the pipe, and β represents the sound absorption coefficient of the building material.

4. The method for designing building water supply and drainage pipelines using BIM technology according to claim 3 is characterized in that: The step of obtaining the pipeline interface stability parameter and generating the pipeline interface information specifically includes: According to the pipeline model corresponding to the low-noise pipeline, the geometric feature data of the low-noise pipeline is determined, and compared with the pipeline interface to obtain the geometric interface similarity of the pipe fittings; Analyze the model parameters of the pipeline components to obtain the elastic modulus of each material pipe fitting and the outer diameter of each low-noise pipeline; Through BIM software, based on the data information of pipeline components and the expected building water flow information, the speed of water flowing through the pipeline interface is simulated to obtain the pipeline displacement, the pressure on the pipeline interface and the flow smoothness; According to the use function of the building, determine the structural hierarchy priority of the water supply and drainage pipelines, and obtain the weight value corresponding to each structural hierarchy; The pipeline interface stability parameters are obtained by combining the geometric interface similarity of the pipe fittings, the displacement of the pipe, the weight values ​​corresponding to each structural level, the elastic modulus of each material pipe fitting, the pressure bearing capacity and the flow smoothness; According to the size of the pipeline interface sealing stability parameters, select the optimal pipe fittings, and generate pipeline interface information in combination with the pipeline component data information; Among them, the specific calculation formula of pipeline interface stability parameters is: In the formula, δ seal represents the elastic modulus of the pipe interface, V represents the speed of water flowing through the pipe interface, and t seal Indicates the thickness of the pipe interface, ΔL indicates the displacement of the pipe, and D resem represents the geometric similarity of the pipeline interface, N represents the pressure of the pipeline interface, M represents the flow smoothness, ∈1, ∈2 and ∈3 represent the weight values ​​corresponding to each structural level, respectively, and D pipe Indicates the outer diameter of the low noise pipe.

5. A method for designing building water supply and drainage pipelines based on BIM technology according to claim 4, characterized in that: The obtaining of the available position information and assembly priority of the low-noise pipeline specifically includes: According to the modeling software and pipeline model parameters, boundary warning lines are set on the surface of the expected building 3D model and the low-noise pipeline model; The expected building 3D model is divided into internal spaces according to floor data, and low-noise pipes are arranged in vertical space according to the corresponding building height information; According to the floor data of the expected building three-dimensional model, a low-noise pipeline model of the corresponding floor is obtained; Based on BIM software, the expected building 3D model and the low-noise pipe model on the same floor are placed in the same space, and the low-noise pipe model is traversed and placed in the expected building 3D model. If the boundary warning lines of the expected building 3D model and the low-noise pipe model intersect or overlap, the traversal result data is marked as abnormal data. If the boundary warning lines of the expected building 3D model and the low-noise pipe model do not overlap, the traversal result data is marked as available data, and the available data traversal results in each space are obtained to generate the available location information of the low-noise pipes on each floor. Based on available data and pipeline interface information, simulate the connection between pipelines and pipe fittings to obtain available pipeline connection process information; The installation steps in the available pipeline connection process information are split and reorganized, and the reorganized installation steps are simulated to obtain the time required for the reorganized installation steps and determine the assembly priority.

6. A method for designing building water supply and drainage pipelines based on BIM technology according to claim 5, characterized in that: The simulating of pipeline noise at each available position to determine the preferred pipeline position information specifically includes: Simulate pipe water flow based on expected building water flow, average value, peak value and time distribution information of various types of flow; According to the pipeline interface information and the available location information of the low-noise pipeline, simulate the overall structural layout of the low-noise pipeline in the building; Through BIM software, combined with the overall structural layout of low-noise pipes in the building and simulated pipe water flow, the pipe noise of low-noise pipes at various available locations is obtained; Divide the internal areas of the building according to the expected design requirements of the building and obtain the pipeline access points on each floor; The preferred pipeline location information is determined by combining the corridor access points on each floor and the pipeline noise of the low-noise pipeline at each available position.

7. A building water supply and drainage pipeline design system based on BIM technology, applicable to the design method according to any one of claims 1 to 6, characterized in that: include: A data acquisition module, which is used to collect common pipeline component data, building data information, surface friction corresponding to pipeline materials and noise coefficients of various types of pipelines, and transmit the collected data to the data integration module; A data integration module, which is used to analyze the data, including extracting expected building feature data, obtaining expected building water flow information, generating pipeline model parameters, matching degree of connection ports of each low-noise pipeline, and transmitting the data to the model generation module, the simulation module and the conflict detection module; A model generation module, which is used to generate a corresponding model using the BIM technology from the received data information, annotate the model parameters, and transmit the generated model data to the simulation module and the pipeline layout module; A simulation module, which is used to deduce the received data and obtain all deduction results based on given conditions; A pipeline layout module, which is used to generate a reasonable pipeline connection layout through the pipeline model and pipe fitting model transmitted by the model generation module, and transmit the data to the scheme design module; A conflict detection module, which is used to determine whether there is a conflict between the building and the pipeline through the boundary warning lines set on the surfaces of the expected building three-dimensional model and the low-noise pipeline model, mark the data results according to the judgment results, and transmit the data to the scheme design module; The scheme design module is used to integrate and analyze the received data and generate a pipeline design scheme.

8. The building water supply and drainage pipeline design system based on BIM technology according to claim 7 is characterized in that: The data integration module specifically includes: A first data integration unit, the first data integration unit is used to analyze the expected design requirements of the building, sample building information, and time distribution information of various types of flow, obtain the expected population data of the building, floor data, area data, floor water flow weight coefficient, area water flow weight coefficient, seasonal condition water flow weight coefficient, water flow distribution coefficient of daily cycle time, and obtain expected building water flow information; A second data integration unit, the second data integration unit is used to analyze the expected design requirements of the building, extract the characteristic data of the expected building, analyze the data information of the pipeline components, generate pipeline model parameters, and transmit the data to the model generation module; The third data integration unit, the third data integration module is used to analyze the data information of the low-noise pipeline and the pipeline component, generate the matching degree of the connection port of each low-noise pipeline, and transmit the data to the simulation module.

9. The building water supply and drainage pipeline design system based on BIM technology according to claim 8 is characterized in that: The simulation module specifically includes: A first simulation module, wherein the first simulation module is used to simulate the vertical arrangement of low-noise pipes corresponding to each floor, simulate the connection between pipes and pipe interfaces, generate an available pipe connection process, split and reorganize specific steps of the available pipe connection process, and simulate the reorganized connection process; The second simulation module is used to simulate the pipeline water flow through the expected building water flow information, combined with the available position information of the low-noise pipeline, simulate the pipeline noise generated by the water flow passing through the low-noise pipelines at each available position, and transmit the data to the scheme design module.

10. A building water supply and drainage pipeline design system based on BIM technology according to claim 9, characterized in that: The conflict detection module specifically includes: A space detection unit, which is used to analyze the space data, generate available space area data and pipeline occupied space data, determine whether the space data overlaps or intersects, and transmit the data to the boundary warning unit and the data marking unit; A boundary warning unit, the boundary warning unit is used to process the received data, record the outer layer of the spatial data as boundary data, assign a warning attribute to the boundary data, and transmit the data back to the spatial detection unit; The data labeling unit is used to label the data according to the judgment result of the space detection unit. If the judgment result is that overlap or intersection occurs, the data is labeled as abnormal data. If the judgment result is that no overlap or intersection occurs, the data is labeled as normal data.

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