High-precision digital installation construction method for prefabricated parts of transformer substation

Abstract

The invention relates to the technical field of prefabricated part installation, in particular to a substation prefabricated part high-precision digital installation construction method which comprises the steps that three-dimensional scanning is conducted on a substation construction site, and a digital model of the construction site is established; performing three-dimensional scanning on the prefabricated part, and establishing a digital model of the prefabricated part; the digital model of the construction site, the digital model of the prefabricated part and the BIM platform are used for installation simulation, and installation parameters are determined; and performing installation according to the installation parameters. According to the method, three-dimensional scanning is carried out on the substation construction site and the prefabricated parts, the digital model is established, and installation simulation is carried out by using the BIM platform, so that the problem of inaccurate installation position caused by factors such as measurement errors and drawing interpretation deviation is reduced to the greatest extent, the situations such as dislocation and offset after the parts are installed are effectively avoided, and the installation accuracy is improved. Potential installation conflicts and precision problems can be found and solved in advance.

Description

Technical Field

[0001] The present invention relates to the technical field of precast component installation, and particularly to a high-precision digital installation construction method for precast components of a substation. Background Art

[0002] With the rapid development of the power industry, the demand for substation construction is increasing day by day, and higher requirements are also put forward for its construction quality and efficiency. In traditional substation construction, the installation of precast components mainly relies on manual experience and two-dimensional drawings, and there are many disadvantages in this way.

[0003] On the construction site, due to the complex site conditions and certain deviations in the actual positions of various facilities and foundations, it is difficult to accurately grasp the spatial relationship between components solely relying on two-dimensional drawings, which is likely to lead to inaccurate installation positions of components, deviation accumulation, affecting the stability of the overall structure and the installation accuracy of electrical equipment, and thus posing a potential threat to the safe operation of the substation. At the same time, the efficiency of manual measurement and positioning is low. Repeated adjustments and calibrations during the installation process not only consume a large amount of manpower, material resources and time, but also may increase the project cost due to the delay of the construction progress.

[0004] Therefore, how to improve the installation accuracy of precast components is a current research direction. Summary of the Invention

[0005] (I) Object of the Invention

[0006] The object of the present invention is to provide a high-precision digital installation construction method for precast components of a substation that can improve the installation accuracy of precast components.

[0007] (II) Technical Solution

[0008] To solve the above problems, the present invention provides a high-precision digital installation construction method for precast components of a substation, including:

[0009] Performing three-dimensional scanning on the construction site of the substation to establish a digital model of the construction site;

[0010] Performing three-dimensional scanning on the precast components to establish a digital model of the precast components;

[0011] Using the digital model of the construction site, the digital model of the precast components and the BIM platform for installation simulation to determine the installation parameters;

[0012] Performing installation according to the installation parameters.

[0013] On the other hand, preferably,

[0014] The performing three-dimensional scanning on the construction site of the substation to establish a digital model of the construction site includes:

[0015] Scan the construction site of the substation using a three-dimensional scanning device to obtain the three-dimensional point cloud data of the construction site of the substation;

[0016] After segmenting the three-dimensional point cloud data according to the geometric features of the object, perform feature point recognition;

[0017] Fit the three-dimensional point cloud data identified as feature points to obtain the geometric contour of the object;

[0018] Construct a digital model of the object according to the geometric contour of the object;

[0019] Integrate the digital models of several objects to obtain the digital model of the construction site.

[0020] On the other hand, preferably, after segmenting the three-dimensional point cloud data according to the geometric features of the object, performing feature point recognition includes:

[0021] Calculate the normal vector of each three-dimensional point cloud data;

[0022] Calculate the curvature of each three-dimensional point cloud data according to the normal vector;

[0023] The three-dimensional point cloud data with the curvature greater than or equal to the preset curvature threshold is the feature point;

[0024] The preset curvature threshold is set according to the geometric features of the object.

[0025] On the other hand, preferably, fitting the three-dimensional point cloud data identified as feature points to obtain the geometric contour of the object includes:

[0026] Group the feature points to obtain several feature point groups;

[0027] Obtain the control vertices of several feature point groups;

[0028] Generate several segments of feature lines according to the control vertices;

[0029] Stitch the several segments of feature lines to generate the geometric contour of the object.

[0030] On the other hand, preferably, grouping the feature points to obtain several feature point groups includes:

[0031] Preset the minimum number of feature points for grouping;

[0032] If the number of feature points is greater than the preset minimum number of feature points for grouping, then take points in a sliding window in sequence according to the preset minimum number of feature points for grouping until the number of feature points in the last group is less than or equal to the preset minimum number of feature points for grouping;

[0033] If the number of the feature points is less than or equal to the preset minimum number of feature points for grouping, grouping is not required.

[0034] On the other hand of the present invention, preferably, the control vertices are obtained by using the following formula:

[0035]

[0036] where c j represents the jth control vertex, |G j | represents the number of feature points in the jth group of feature points, p i =(x i , y i , z i ) represents the coordinates of the ith feature point in the group of feature points.

[0037] On the other hand of the present invention, preferably,

[0038] the feature lines are generated by using the following formula:

[0039] L k ={(1 - t)c j + t·c j+1 |t ∈ [0, 1]}

[0040] where L k represents the kth feature line, c j represents the jth control vertex, and c j+1 represents the (j + 1)th control vertex.

[0041] On the other hand of the present invention, preferably, the method further includes:

[0042] comparing and analyzing the digital model of the precast member with the corresponding design model to obtain a comparison and analysis result;

[0043] if the comparison and analysis result is greater than the preset safety threshold, correcting the precast member;

[0044] if the comparison and analysis result is less than or equal to the preset safety threshold, installing it.

[0045] On the other hand of the present invention, preferably,

[0046] the digital model of the precast member and the corresponding design model are compared and analyzed by using the following formula:

[0047]

[0048] where E represents the comparison and analysis result, (x i , y i , zi ) represents the coordinates of the \(i\) -th point in the digital model of the precast component, \((x i ', y i ', z i ) represents the coordinates of the \(i\) -th point in the corresponding design model of the precast component, and \(n\) represents the total number of points in the digital model of the precast component.

[0049] On the other hand, preferably,

[0050] the installation parameters include the installation sequence of components and positioning parameters;

[0051] Performing installation according to the installation parameters includes:

[0052] Pre - numbering the precast components in advance according to the installation sequence of components;

[0053] Setting positioning reference points at the construction site;

[0054] According to the precast component numbers, obtaining the hoisting paths of the precast components respectively according to the positioning reference points and positioning parameters;

[0055] Installing the precast components to the corresponding positions of the positioning parameters according to the precast component numbers and the corresponding hoisting paths.

[0056] (III) Beneficial effects

[0057] The above - mentioned technical solution of the present invention has the following beneficial technical effects:

[0058] By performing three - dimensional scanning on the construction site of the substation and the precast components, the present invention can accurately obtain accurate actual dimensions, shapes, and spatial position information. Compared with the traditional method relying on manual measurement and two - dimensional drawings, it minimizes the problem of inaccurate installation positions caused by factors such as measurement errors and drawing interpretation deviations, effectively avoids situations such as misalignment and offset after component installation, ensures more precise connection between precast components, and thus improves the stability and reliability of the entire substation structure. After establishing the digital model, using the BIM platform for installation simulation can discover and solve potential installation conflicts and accuracy problems in advance. Brief description of the drawings

[0059] Figure 1 is the overall flowchart of an embodiment of the present invention. Detailed implementation manners

[0060] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0061] Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0062] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0063] The present invention will be described in more detail below with reference to the accompanying drawings. In the respective drawings, like elements are denoted by like reference numerals. For the sake of clarity, the various parts in the drawings are not drawn to scale.

[0064] Embodiment 1

[0065] A high-precision digital installation construction method for prefabricated components in a substation Figure 1 shows the overall flow chart of an embodiment of the present invention, as Figure 1 shown, including:

[0066] Perform three-dimensional scanning on the substation construction site to establish a digital model of the construction site; use devices such as high-precision three-dimensional laser scanners or optical cameras carried by unmanned aerial vehicles to comprehensively scan the substation construction site. These devices can capture detailed information such as the terrain, landform, existing buildings, and structures at the site. In this embodiment, the performing three-dimensional scanning on the substation construction site to establish a digital model of the construction site includes:

[0067] Scan the substation construction site using a three-dimensional scanning device to obtain the three-dimensional point cloud data of the substation construction site; use a high-precision three-dimensional scanning device (such as a laser scanner, structured light scanner, or stereo vision camera, etc.) to comprehensively scan the substation construction site. These devices can emit laser beams or structured light patterns and receive the reflected signals, thereby calculating the three-dimensional coordinates of each point in the scene to form three-dimensional point cloud data. The position, angle, and coverage range of the scanning device can comprehensively capture the key information at the site, including the terrain, buildings, equipment foundations, etc.

[0068] Perform feature point recognition on the three-dimensional point cloud data after segmentation according to the geometric features of the object; the obtained three-dimensional point cloud data contains a large number of scattered points, and it is segmented to distinguish different objects or regions. The segmentation can be carried out according to the geometric features of the object. After segmentation, feature point recognition is performed on the three-dimensional point cloud data of each object or region. Feature points are points on the object surface with significant geometric features, such as corner points, edge points, curvature extreme points, etc.

[0069] Perform fitting on the three-dimensional point cloud data identified as feature points to obtain the geometric contour of the object; perform fitting processing on the three-dimensional point cloud data identified as feature points. The purpose of fitting is to deduce the geometric contour or shape of the object based on the position information of the feature points.

[0070] Construct a digital model of the object according to the geometric contour of the object; during the construction process, methods such as parametric modeling and feature modeling can be used to improve the modeling efficiency and accuracy;

[0071] Integrate the digital models of several objects to obtain the digital model of the construction site. During the integration process, it should be ensured that the positional relationships, spatial relationships, etc. between the objects meet the design requirements. It can be achieved through methods such as coordinate transformation and Boolean operations. The integrated digital model should contain all key information of the substation construction site, including terrain, buildings, equipment foundations, pipelines, etc. This information will provide strong support for subsequent installation simulation, construction planning, and project management.

[0072] In this embodiment, performing feature point recognition on the three-dimensional point cloud data after segmentation according to the geometric features of the object includes:

[0073] Calculate the normal vector of each three-dimensional point cloud data; the normal vector is an important attribute that describes the surface direction at a point in three-dimensional space. In three-dimensional point cloud data, each point can be regarded as part of a tiny plane sheet, and the normal vector is the perpendicular direction of this plane sheet. The methods for calculating the normal vector can be the local fitting plane method, the method based on the covariance matrix, etc.; the local fitting plane method selects a point and its surrounding neighbor points, fits a plane, and then calculates the normal vector of this plane. The method based on the covariance matrix uses the neighborhood points of each point in the point cloud to construct a covariance matrix, and estimates the normal vector through the eigenvector of the matrix.

[0074] Calculate the curvature of each three-dimensional point cloud data according to the normal vector; calculate the angle between the normal vectors of each point and its neighbor points, and then use these angles to estimate the curvature;

[0075] The three-dimensional point cloud data with a curvature greater than or equal to a preset curvature threshold are feature points; feature points are points in the three-dimensional point cloud data with significant geometric features such as high curvature and edges. In this embodiment, feature points are identified by comparing the curvature of each point with the preset curvature threshold.

[0076] The preset curvature threshold is set according to the geometric features of the object. According to the geometric features of the object, a reasonable curvature threshold is set. This threshold should be able to distinguish significant feature points from flat regions.

[0077] Further, in this embodiment, fitting the three-dimensional point cloud data identified as feature points to obtain the geometric contour of the object includes:

[0078] Grouping the feature points to obtain several groups of feature points; the grouping rule can be distance or based on geometric attributes. In this embodiment, grouping the feature points to obtain several groups of feature points includes:

[0079] Presetting the minimum number of feature points for grouping; it is necessary to preset a minimum number of feature points for grouping, and this number determines at least how many feature points should be included in each group of feature points. The preset number should be determined according to the geometric features of the object, the density of the point cloud, and the requirements of subsequent processing. If the preset number is too small, it may lead to too many groups, increasing the complexity of subsequent processing; if the preset number is too large, it may not fully reflect the detailed features of the object.

[0080] If the number of feature points is greater than the preset minimum number of feature points for grouping, then slide the window to pick points in sequence according to the preset minimum number of feature points for grouping until the number of feature points in the last group is less than or equal to the preset minimum number of feature points for grouping; create a sliding window in the feature point sequence, and the size of this sliding window is equal to the preset minimum number of feature points for grouping. Starting from the starting position of the feature point sequence, slide the window in sequence, and take the feature points within the window as a group each time. When the window slides to the end of the feature point sequence, it may encounter the situation where the number of feature points in the last group is less than the preset minimum number of feature points for grouping. At this time, these remaining feature points can be taken as a separate group. If the number of feature points is less than or equal to the preset minimum number of feature points for grouping, there is no need to group.

[0081] Obtaining the control vertices of several groups of feature points; the control vertex is the representative of the group of feature points. In the group of feature points, the control vertex can reflect the features of the group of feature points. The control vertex can be selected manually; for automatic selection, an algorithm can be used to automatically select the control vertex.

[0082] In this embodiment, the control vertex is obtained using the following formula:

[0083]

[0084] Among them, c j represents the j-th control vertex, |G j | represents the number of feature points in the j-th group of feature points, p i =(x i , y i , z i ) represents the coordinates of the i-th feature point in the group of feature points.

[0085] Generate several segments of feature lines according to the control vertices; in this embodiment, the feature lines are generated using the following formula:

[0086] L k ={(1 - t)c j + t·c j+1 |t ∈ [0, 1]}

[0087] Among them, L k represents the k-th feature line, c j represents the j-th control vertex, c j+1 represents the j + 1-th control vertex.

[0088] Stitch the several segments of feature lines to generate the geometric contour of the object. Grouping the feature points, calculating the control vertices, and generating the feature lines are all for reducing the computational amount. By presetting the minimum number of feature points for grouping and grouping the feature points according to this number, the computational amount in subsequent processing can be significantly reduced. For large-scale point cloud data, where the number of feature points is huge, direct processing will consume a large amount of computing resources. The control vertex, as the representative of the group of feature points, can accurately reflect the geometric characteristics of the group. Using the control vertex to replace the entire group of feature points for processing can greatly simplify subsequent steps, such as feature line generation and stitching, thereby further reducing the computational amount.

[0089] Perform three-dimensional scanning on the precast component to establish a digital model of the precast component; the digital model of the precast component can be established using the same method as above. Further, in this embodiment, the method further includes:

[0090] Compare and analyze the digital model of the precast component with the corresponding design model to obtain the comparison and analysis result; in this embodiment, the digital model of the precast component and the corresponding design model are compared and analyzed using the following formula:

[0091]

[0092] Among them, E represents the comparison and analysis result, (x i , y i , z i ) represents the coordinates of the i-th point in the digital model of the precast component, (xi ', y i ', z i ') represents the coordinates of the i-th point in the design model corresponding to the digital model of the precast component, and n represents the total number of points in the digital model of the precast component. The comparative analysis result can be a difference report, listing the coordinate differences of each feature point participating in the comparative analysis in the two models, and using a 3D visualization tool to display the differences between the two models, so as to more intuitively understand the distribution and degree of the deviation;

[0093] If the comparative analysis result is greater than the preset safety threshold, the precast component is corrected; the preset safety threshold is set according to engineering requirements, industry standards or empirical rules, and is used to judge whether the deviation of the precast component is within an acceptable range. When the comparative analysis result shows that the deviation of the precast component exceeds the preset safety threshold, it indicates that the precast component does not meet the design requirements. The precast component needs to be corrected. The correction may include operations such as reprocessing, adjusting dimensions, modifying the shape or position, etc. The corrected precast component should be scanned three-dimensionally and the digital model rebuilt again, and a new comparative analysis should be carried out with the design model to ensure that it meets the design requirements.

[0094] If the comparative analysis result is less than or equal to the preset safety threshold, installation is carried out. When the comparative analysis result shows that the deviation of the precast component is within the preset safety threshold range, it indicates that the precast component meets the design requirements and can be installed; the installation process should follow relevant engineering specifications and standards to ensure the correct installation and positioning of the precast component.

[0095] Use the digital model of the construction site, the digital model of the precast component and the BIM platform to carry out installation simulation to determine the installation parameters; run the installation simulation in the BIM platform and observe the installation process of the precast component at the construction site. Pay attention to checking the collision situation between the precast component and other objects at the construction site, as well as whether the installation position and attitude of the precast component meet the requirements.

[0096] According to the installation parameters, installation is carried out. In this embodiment, the installation parameters include the component installation sequence and positioning parameters;

[0097] Carrying out installation according to the installation parameters includes:

[0098] Pre-number the precast components according to the component installation sequence; before installation, number each precast component according to the component installation sequence determined by the simulation. The numbering should be clear, accurate and easy to identify, so as to quickly find the corresponding precast component at the construction site. The numbering contains key information such as the type, size, weight, etc. of the precast component, so that the construction personnel can better understand the characteristics of the component.

[0099] Set positioning reference points at the construction site; according to the design requirements and simulation results, set positioning reference points at the construction site. The positioning reference points can include horizontal reference points, vertical reference points, etc., which are used to determine the accurate position of precast components in three-dimensional space.

[0100] According to the precast component numbers, obtain the hoisting paths of the precast components respectively based on the positioning reference points and positioning parameters; according to the numbers and positioning parameters of the precast components, combined with the actual situation of the construction site, plan the hoisting paths of each precast component. The hoisting paths should avoid obstacles to ensure the safety and efficiency of the hoisting process. The hoisting paths should also consider the performance parameters of the hoisting equipment, such as hoisting height, hoisting radius, etc., to ensure the smooth progress of the hoisting process.

[0101] Install the precast components to the corresponding positions of the positioning parameters according to the precast component numbers and the corresponding hoisting paths. According to the numbers and hoisting paths of the precast components, hoist the precast components to the construction site in sequence. During the hoisting process, closely monitor the attitude and position of the precast components to ensure their consistency with the positioning parameters. When the precast component reaches the predetermined position, use positioning tools (such as laser rangefinders, total stations, etc.) for precise measurement and adjustment to ensure the accurate installation of the precast component. After installation, fix and inspect the precast component to ensure its stability and safety.

[0102] By performing three-dimensional scanning on the substation construction site and precast components, the present invention can accurately obtain accurate actual dimensions, shapes and spatial position information. Compared with the traditional method relying on manual measurement and two-dimensional drawings, it minimizes the problem of inaccurate installation positions caused by factors such as measurement errors and drawing interpretation deviations, effectively avoids situations such as misalignment and offset after component installation, ensures more precise connection between precast components, and thus improves the stability and reliability of the entire substation structure. After establishing the digital model, using the BIM platform for installation simulation can discover and solve potential installation conflicts and accuracy problems in advance.

[0103] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principles of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modification examples falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

[0104] The present invention has been described above with reference to the embodiments of the present invention. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should fall within the scope of the present invention.

[0105] Although the embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions, and alterations can be made to the embodiments of the present invention without departing from the spirit and scope of the present invention.

[0106] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A high-precision digital installation construction method for prefabricated components of a substation, characterized in that: include: Conduct 3D scanning of the substation construction site and establish a digital model of the construction site; Conduct 3D scanning of prefabricated components and establish digital models of prefabricated components; Use the digital model of the construction site, the digital model of prefabricated components and the BIM platform to simulate the installation and determine the installation parameters; Perform installation according to the installation parameters.

2. The high-precision digital installation construction method for prefabricated components of a substation according to claim 1 is characterized in that: The three-dimensional scanning of the substation construction site and establishment of a digital model of the construction site include: Scanning the substation construction site using a three-dimensional scanning device to obtain three-dimensional point cloud data of the substation construction site; Segmenting the three-dimensional point cloud data according to geometric features of the object and then performing feature point recognition; Fit the three-dimensional point cloud data identified as feature points to obtain the geometric outline of the object; constructing a digital model of the object according to the geometric outline of the object; Integrate the digital models of several objects to obtain a digital model of the construction site.

3. The high-precision digital installation construction method for prefabricated components of a substation according to claim 2 is characterized in that: Segmenting the three-dimensional point cloud data according to the geometric features of the object and then performing feature point recognition includes: Calculate the normal vector of each of the three-dimensional point cloud data; Calculate the curvature of each three-dimensional point cloud data according to the normal vector; The three-dimensional point cloud data whose curvature is greater than or equal to a preset curvature threshold is a feature point; The preset curvature threshold is set according to the geometric features of the object.

4. The high-precision digital installation construction method for prefabricated components of a substation according to claim 2 is characterized in that: Fitting the 3D point cloud data identified as feature points to obtain the geometric outline of the object includes: Group the feature points to obtain several feature point groups; Obtaining a number of control vertices of the feature point groups; generating a plurality of characteristic lines according to the control vertices; The plurality of feature lines are spliced ​​together to generate a geometric outline of the object.

5. The high-precision digital installation construction method for prefabricated components of a substation according to claim 4 is characterized in that: The feature points are grouped to obtain several feature point groups including: Preset the minimum number of feature points for grouping; If the number of feature points is greater than the preset minimum number of feature points for grouping, the points are grouped by sliding the box in sequence according to the preset minimum number of feature points for grouping until the number of feature points in the last group is less than or equal to the preset minimum number of feature points for grouping; If the number of feature points is less than or equal to the preset minimum number of feature points for grouping, no grouping is required.

6. The high-precision digital installation construction method for prefabricated components of a substation according to claim 5 is characterized in that: The control vertex is obtained using the following formula: Among them, c j represents the jth control vertex, |G j | represents the number of feature points in the jth feature point group, p i =(x i ,y i ,z i ) represents the coordinates of the i-th feature point in the feature point group.

7. The high-precision digital installation construction method for prefabricated components of a substation according to claim 6 is characterized in that: The characteristic line is generated using the following formula: L k ={(1-t)c j +t·c j+1 |t∈[0,1]} Among them, L k represents the kth characteristic line, c j represents the jth control vertex, c j+1 represents the j+1th control vertex.

8. The high-precision digital installation construction method for prefabricated components of a substation according to claim 1 is characterized in that: The method further comprises: Compare and analyze the digital model of the prefabricated component with the corresponding design model to obtain comparative analysis results; If the comparative analysis result is greater than a preset safety threshold, the prefabricated component is corrected; If the comparison analysis result is less than or equal to the preset safety threshold, installation is performed.

9. The high-precision digital installation construction method for prefabricated components of a substation according to claim 8 is characterized in that: The digital model of the prefabricated component and the corresponding design model are compared and analyzed using the following formula: Among them, E represents the comparative analysis results, (x i ,y i ,z i ) represents the coordinates of the i-th point in the digital model of the prefabricated component, (x i ',y i ',z i ') represents the coordinates of the ith point in the design model corresponding to the prefabricated component digital model, and n represents the total number of points in the prefabricated component digital model.

10. The high-precision digital installation construction method for prefabricated components of a substation according to claim 1 is characterized in that: The installation parameters include component installation sequence and positioning parameters; According to the installation parameters, the installation includes: Pre-number the prefabricated components according to the order in which they are to be installed; Set up positioning benchmarks at the construction site; According to the prefabricated component number, the hoisting path of the prefabricated component is obtained respectively according to the positioning reference point and the positioning parameter; The prefabricated components will be installed to the corresponding positions of the positioning parameters according to the prefabricated component numbers and the corresponding lifting paths.

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