Ellipsoidal curved glass curtain wall mounting and positioning method based on BIM (Building Information Modeling)

Abstract

The invention discloses a BIM (Building Information Modeling)-based ellipsoidal curved glass curtain wall mounting and positioning method, which comprises the following steps of: constructing a curtain wall mounting plane model and a curved glass curtain wall model according to design parameters of a mounting plane of a curtain wall, and constructing correction constraint conditions; the relative position between the curtain wall installation plane model and the curved glass curtain wall model is corrected in the spatial three-dimensional coordinate system, and correction of the overall installation position of the curved glass curtain wall model is achieved; evaluating the stability of each curved glass curtain wall mounting block by using the size parameter of each curved glass curtain wall mounting block, and planning a connecting point between the curved glass curtain wall mounting block and the mounting fixing frame; and a constructor installs the curved glass curtain wall installation blocks on the curtain wall installation plane according to the planned installation sequence of the curved glass curtain wall installation blocks, and measures the coordinate error of the connection point of the previous installed curved glass curtain wall installation block to correct the coordinate of the connection point of the next curved glass curtain wall installation block to be installed.

Description

Technical Field

[0001] The invention relates to the field of design and construction of irregular glass curtain walls, and in particular to a BIM-based ellipsoidal curved glass curtain wall installation and positioning method. Background Art

[0002] With the increasing diversification and personalization of modern architectural design, ellipsoidal curved glass curtain walls are widely used in many large buildings. However, while pursuing aesthetics, due to its complex curved shape and irregular design, it faces many challenges in the installation and positioning process. Traditional installation and positioning methods often rely on on-site measurements and empirical judgments. It is difficult to accurately determine the installation position of each glass curtain wall, which easily leads to the accumulation of installation errors, affecting the overall aesthetics, sealing and structural stability of the curtain wall, and the construction efficiency is low and the cost is high. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a BIM-based ellipsoidal curved glass curtain wall installation and positioning method, which realizes high-precision installation and positioning of the ellipsoidal curved glass curtain wall during the installation design process by establishing a model in BIM software.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A BIM-based ellipsoidal curved glass curtain wall installation and positioning method is provided, which comprises the following steps:

[0006] S1: According to the design parameters of the curtain wall installation plane, a curtain wall installation plane model and a curved glass curtain wall model are constructed in the BIM software, and correction constraints are constructed. The relative position between the curtain wall installation plane model and the curved glass curtain wall model is corrected in the three-dimensional spatial coordinate system to realize the correction of the overall installation position of the curved glass curtain wall model;

[0007] S2: Use the size parameters of each curved glass curtain wall mounting block to evaluate the stability of the curved glass curtain wall mounting block and plan the connection points between the curved glass curtain wall mounting block and the mounting bracket;

[0008] S3: The construction personnel install the curved glass curtain wall installation blocks on the curtain wall installation plane according to the planned installation sequence of the curved glass curtain wall installation blocks, and measure the coordinate error of the connection point of the last installed curved glass curtain wall installation block to correct the coordinate of the connection point of the next curved glass curtain wall installation block to be installed.

[0009] Further, step S1 includes:

[0010] S11: construct a curtain wall installation plane model in the BIM software according to the design parameters of the curtain wall installation plane, and construct a curved glass curtain wall model based on the design parameters of the curved glass curtain wall on the curtain wall installation plane model;

[0011] S12: On the curved glass curtain wall model, evenly split it into n correction units, and evenly split the curtain wall installation plane model into n positioning units, construct a spatial three-dimensional coordinate system, and obtain the coordinates (x n ,y n ,z n )、(X n ,X n ,X n ) to ensure that the spatial three-dimensional coordinate system coincides with the three-dimensional coordinate system of the curved glass curtain wall construction site;

[0012] S13: Calculate the distance between the center of the correction unit and the center of the corresponding positioning unit below, correct the relative position between the curved glass curtain wall model and the curtain wall installation plane model, and then correct the installation position of the entire curved glass curtain wall model, and the correction process satisfies the constraint conditions;

[0013]

[0014] Where A is the center coordinate set of the correction unit, N is the number of correction units, and d n～n-1 It is the straight-line distance between the centers of two adjacent positioning units determined from the design dimensions;

[0015] S14: Complete the correction of the overall installation position of the curved glass curtain wall model.

[0016] Further, step S2 includes:

[0017] S21: splitting the curved glass curtain wall model into a number of installation reference units according to the design size of each curved glass curtain wall installation block; calculating the stability coefficient f of the corresponding curved glass curtain wall installation block according to the size parameters of each installation reference unit;

[0018]

[0019] Among them, β 0 is the stress coefficient, β 1 is the wind vibration coefficient, μ 1 is the curved wind load shape coefficient of the curved glass curtain wall installation block, μ 2 is the wind pressure height variation coefficient of the curved glass curtain wall installation block corresponding to the installation height, ω 0 is the basic wind pressure, b is the short side length of the curved glass curtain wall installation block, t is the thickness of the curved glass curtain wall installation block, σ0 is the maximum stress that the curved glass curtain wall installation block can withstand, α is the earthquake influence coefficient, M is the deadweight of the curved glass curtain wall installation block, γ is the gravity equivalent coefficient, ε 1 , ε 2 are the weight coefficients of the influence of wind and earthquake on the stability of the curved glass curtain wall installation block, F 0 Seismic stress resistance of installation blocks for curved glass curtain walls;

[0020] S22: Set the stability coefficient threshold f of the curved glass curtain wall installation block 阈值 ;

[0021] If f≤f 阈值 , it is determined that the structural stability of the curved glass curtain wall mounting block meets the requirements, and the mounting brackets at the four top corners of the curved glass curtain wall mounting block have met the stability requirements;

[0022] If f>f 阈值 , it is determined that the structural stability of the curved glass curtain wall mounting block does not meet the requirements, and it is necessary to add an installation bracket at the center point of the curved glass curtain wall mounting block to increase the structural stability of the curved glass curtain wall mounting block after installation.

[0023] Further, step S3 includes:

[0024] S31: according to the planned connection points between the mounting bracket and the curved glass curtain wall mounting block, marking equivalent connection points at equivalent positions on the mounting reference unit, and obtaining the coordinates of each equivalent connection point;

[0025] S32: After the overall installation position correction of the curved glass curtain wall model is completed, the installation coordinates of the installation bracket of each curved glass curtain wall installation block on the curtain wall installation plane are obtained, and the installation bracket is installed on the corresponding installation coordinates with reference to the construction three-dimensional coordinate system of the on-site construction; the installation bracket uses the four vertex positions of each curved glass curtain wall installation block as connection points, and the installation bracket is perpendicular to the curtain wall installation plane;

[0026] S33: The construction personnel plan the installation sequence of the curved glass curtain wall installation blocks, install the curved glass curtain wall installation blocks on the curtain wall installation plane, and after the previous curved glass curtain wall installation block is installed, measure the coordinates of the actual connection point (x 0 ,y 0 ,z 0 );

[0027] S34: Calculate the coordinates of the actual connection point (x 0 ,y 0 ,z 0 ) and the coordinates of the corresponding equivalent connection point (x′ 0 ,y′0 ,z′ 0 )’s coordinate difference value (Δx, Δy, Δz) = (x 0 -x′ 0 ,y 0 -y′ 0 ,z 0 -z′ 0 );

[0028] S35: Calculate the distance between each equivalent connection point i and the actual connection point based on all equivalent connection points on the next curved glass curtain wall installation block to be installed (x i ,y i ,z i ) is the coordinate of the i-th equivalent connection point on the next curved glass curtain wall installation block to be installed, and the distance data set (d 1 ,d 2 ,…,d i );

[0029] S36: Filter out the distance data group (d 1 ,d 2 ,…,d i ) in the minimum value d min The corresponding equivalent connection point coordinates (x imin ,y imin ,z imin ), according to the coordinate difference value (Δx, Δy, Δz), the coordinates of the equivalent connection point (x imin ,y imin ,z imin ) to obtain the corrected equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min );

[0030] (x i ' min ,y i ' min ,z i ' min )=(x i ' min +Δx,y i ' min +Δy,z i ' min +Δz);

[0031] S37: Determine the corrected equivalent connection point coordinates (x i 'min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed; if so, the next curved glass curtain wall installation block to be installed is located at the equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is the reference connection point, execute step S38; otherwise, execute step S310;

[0032] S38: According to the coordinates of the reference connection point (x i ' min ,y i ' min ,z i ' min ) and the corresponding installation coordinates (X imin ,Y imin ,Z imin ) Establish the equation of the straight line connecting the two;

[0033]

[0034] S39: Draw a straight line where the connection line between the two is located in the three-dimensional coordinate system of the space, and extend the straight line to intersect with the installation reference unit, and the intersection point is used as the first connection point when installing the next curved glass curtain wall installation block to be installed. During the installation of the next curved glass curtain wall installation block to be installed, first connect it to the installation fixing frame below through the first connection point, and after positioning is achieved, connect the other connection points to the installation fixing frame;

[0035] S310: Move the installation fixing frame to a position on the curtain wall installation plane, and connect the original connection point on the next curved glass curtain wall installation block to be installed to the installation fixing frame.

[0036] Further, determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit:

[0037] S371: Obtain the coordinates of m uniform points on the boundary of the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed (x m ,y m ,zm ), project all m points into the xoy plane, to the m projection point coordinates (x m ,y m ,0);

[0038] S372: taking the maximum value and the minimum value of the coordinates of the m projection points as the area constraint conditions;

[0039]

[0040] S373: Equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is also projected into the xoy plane to obtain the equivalent connection point projection coordinates (x i ' min ,y i ' min ,0);

[0041] If x is satisfied imin ∈[x min ,x max ] and y imin [y min ,y max ], then determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed. Otherwise, determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is not within the area enclosed by the installation reference units corresponding to the next curved glass curtain wall installation block to be installed.

[0042] The beneficial effects of the present invention are as follows: the present invention designs the installation position of each different curved glass curtain wall installation block by constructing a model of the curved glass curtain wall and a model of the curtain wall installation plane in BIM software, and can achieve accurate positioning to obtain the positioning coordinates of the installation position. During the installation process of the construction personnel, based on the designed installation sequence, the installation error of the previous curved glass curtain wall installation block can be used to correct the connection point position of the curved glass curtain wall installation block to be installed, so as to achieve dynamic correction of the installation process, avoid the accumulation of errors leading to a decrease in the overall installation quality of the curved glass curtain wall, and simultaneously consider the stability of the curved glass curtain wall, so as to effectively improve the accuracy of the installation positioning of the glass curtain wall, reduce construction and installation errors, improve construction efficiency, and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of the installation and positioning method of the ellipsoidal curved glass curtain wall based on BIM. DETAILED DESCRIPTION

[0044] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0045] like Figure 1 As shown, a BIM-based ellipsoidal curved glass curtain wall installation and positioning method includes the following steps:

[0046] S1: Construct a curtain wall installation plane model and a curved glass curtain wall model in the BIM software according to the design parameters of the curtain wall installation plane, construct correction constraints, correct the relative position between the curtain wall installation plane model and the curved glass curtain wall model in the three-dimensional coordinate system, and realize the correction of the overall installation position of the curved glass curtain wall model. Step S1 specifically includes:

[0047] S11: construct a curtain wall installation plane model in the BIM software according to the design parameters of the curtain wall installation plane, and construct a curved glass curtain wall model based on the design parameters of the curved glass curtain wall on the curtain wall installation plane model;

[0048] S12: On the curved glass curtain wall model, evenly split it into n correction units, and evenly split the curtain wall installation plane model into n positioning units, construct a spatial three-dimensional coordinate system, and obtain the coordinates (x n ,y n ,z n )、(Xn ,X n ,X n ) to ensure that the spatial three-dimensional coordinate system coincides with the three-dimensional coordinate system of the curved glass curtain wall construction site;

[0049] S13: Calculate the distance between the center of the correction unit and the center of the corresponding positioning unit below, correct the relative position between the curved glass curtain wall model and the curtain wall installation plane model, and then correct the installation position of the entire curved glass curtain wall model, and the correction process satisfies the constraint conditions;

[0050]

[0051] Where A is the center coordinate set of the correction unit, N is the number of correction units, and d n～n-1 It is the straight-line distance between the centers of two adjacent positioning units determined from the design dimensions;

[0052] In the three-dimensional coordinate system of the BIM software, the installation position is corrected by moving the curved glass curtain wall model. Ideally, the center of the correction unit and the center of the positioning unit should be perpendicular to the correction unit and the positioning unit, so that the fixing frame can be sufficiently stable when connected to the curved glass curtain wall, and the installation difficulty is reduced. Since both the positioning unit and the correction unit may be curved, the distance between the two centers is minimized by fine-tuning the curved glass curtain wall model, ensuring that the most correction units and positioning units are aligned.

[0053] S14: Complete the correction of the overall installation position of the curved glass curtain wall model.

[0054] S2: Evaluate the stability coefficient of the curved glass curtain wall installation block according to the size parameters of each curved glass curtain wall installation block, and plan the connection points between the curved glass curtain wall installation block and the installation fixing frame. Step S2 specifically includes:

[0055] S21: splitting the curved glass curtain wall model into a number of installation reference units according to the design size of each curved glass curtain wall installation block; calculating the stability coefficient f of the corresponding curved glass curtain wall installation block according to the size parameters of each installation reference unit;

[0056]

[0057] Among them, β 0 is the stress coefficient, β 1 is the wind vibration coefficient, μ 1 is the curved wind load shape coefficient of the curved glass curtain wall installation block, μ 2 is the wind pressure height variation coefficient of the curved glass curtain wall installation block corresponding to the installation height, ω 0is the basic wind pressure, b is the short side length of the curved glass curtain wall installation block, t is the thickness of the curved glass curtain wall installation block, σ 0 is the maximum stress that the curved glass curtain wall installation block can withstand, α is the earthquake influence coefficient, M is the deadweight of the curved glass curtain wall installation block, γ is the gravity equivalent coefficient, ε 1 , ε 2 are the weight coefficients of the influence of wind and earthquake on the stability of the curved glass curtain wall installation block, F 0 Seismic stress resistance of installation blocks for curved glass curtain walls;

[0058] S22: Set the stability coefficient threshold f of the curved glass curtain wall installation block 阈值 ;

[0059] If f≤f 阈值 , it is determined that the structural stability of the curved glass curtain wall mounting block meets the requirements, and the mounting brackets at the four top corners of the curved glass curtain wall mounting block have met the stability requirements;

[0060] If f>f 阈值 , it is determined that the structural stability of the curved glass curtain wall mounting block does not meet the requirements, and it is necessary to add an installation bracket at the center point of the curved glass curtain wall mounting block to increase the structural stability of the curved glass curtain wall mounting block after installation.

[0061] S3: The construction personnel install the curved glass curtain wall installation blocks on the curtain wall installation plane according to the planned installation sequence of the curved glass curtain wall installation blocks, and measure the coordinate error of the connection point of the last installed curved glass curtain wall installation block to correct the coordinate of the connection point of the next curved glass curtain wall installation block to be installed. Step S3 specifically includes:

[0062] S31: according to the planned connection points between the mounting bracket and the curved glass curtain wall mounting block, marking equivalent connection points at equivalent positions on the mounting reference unit, and obtaining the coordinates of each equivalent connection point;

[0063] S32: After the overall installation position correction of the curved glass curtain wall model is completed, the installation coordinates of the installation bracket of each curved glass curtain wall installation block on the curtain wall installation plane are obtained, and the installation bracket is installed on the corresponding installation coordinates with reference to the construction three-dimensional coordinate system of the on-site construction; the installation bracket uses the four vertex positions of each curved glass curtain wall installation block as connection points, and the installation bracket is perpendicular to the curtain wall installation plane;

[0064] S33: The construction personnel plan the installation sequence of the curved glass curtain wall installation blocks, install the curved glass curtain wall installation blocks on the curtain wall installation plane, and after the previous curved glass curtain wall installation block is installed, measure the coordinates of the actual connection point (x 0 ,y0 ,z 0 );

[0065] S34: Calculate the coordinates of the actual connection point (x 0 ,y 0 ,z 0 ) and the coordinates of the corresponding equivalent connection point (x′ 0 ,y′ 0 ,z′ 0 )’s coordinate difference value (Δx, Δy, Δz) = (x 0 -x′ 0 ,y 0 -y′ 0 ,z 0 -z′ 0 );

[0066] S35: Calculate the distance between each equivalent connection point i and the actual connection point based on all equivalent connection points on the next curved glass curtain wall installation block to be installed (x i ,y i ,z i ) is the coordinate of the i-th equivalent connection point on the next curved glass curtain wall installation block to be installed, and the distance data set (d 1 ,d 2 ,…,d i );

[0067] During the actual installation process of the curved glass curtain wall, the whole is split into several curved glass curtain wall installation blocks. The construction personnel will plan an installation path for sequential installation according to the convenience of the actual installation operation. The present invention can correct the equivalent connection point of the next curved glass curtain wall installation block to be installed according to the error of the last installed curved glass curtain wall installation block, thereby correcting the installation position.

[0068] S36: Filter out the distance data group (d 1 ,d 2 ,…,d i ) in the minimum value d min The corresponding equivalent connection point coordinates (x imin ,y imin ,z imin ), according to the coordinate difference value (Δx, Δy, Δz), the coordinates of the equivalent connection point (x imin ,y imin ,z imin ) to obtain the corrected equivalent connection point coordinates (xi′min, yi′min, zi′min) on the next curved glass curtain wall installation block to be installed; the minimum value d minThe corresponding equivalent connection point is closest to the equivalent connection point on the last installed curved glass curtain wall installation block, so the connection point of the next block is corrected using the principle of proximity to reduce the probability of error;

[0069] (x i ' min ,y i ' min ,z i ' min )=(x i ' min +Δx,y i ' min +Δy,z i ' min +Δz);

[0070] S37: Determine the corrected equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed; if so, the next curved glass curtain wall installation block to be installed is located at the equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is the reference connection point, execute step S38; otherwise, execute step S310.

[0071] If the installation error of the last installed curved glass curtain wall installation block is large, it will cause a large coordinate error of the actual connection point thereon, and over-correction or correction failure may occur during the correction process of the next connection point. Therefore, the present invention introduces a process of determining whether the coordinates of the corrected equivalent connection points are within the area enclosed by the corresponding installation reference unit to reduce the correction error.

[0072] Determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit:

[0073] S371: Obtain the coordinates of m uniform points on the boundary of the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed (x m ,y m ,z m), project all m points into the xoy plane, to the m projection point coordinates (x m ,y m ,0);

[0074] S372: taking the maximum value and the minimum value of the coordinates of the m projection points as the area constraint conditions;

[0075]

[0076] S373: Equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is also projected into the xoy plane to obtain the equivalent connection point projection coordinates (x i ' min ,y i ' min ,0);

[0077] If x is satisfied imin ∈[x min ,x max ] and y imin [y min ,y max ], then determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed. Otherwise, determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is not within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed;

[0078] S310: Move the installation fixing frame to a position on the curtain wall installation plane, and connect the original connection point on the next curved glass curtain wall installation block to be installed to the installation fixing frame.

[0079] S38: According to the coordinates of the reference connection point (x i ' min ,y i ' min ,z i ' min ) and the corresponding installation coordinates (X imin ,Yimin ,Z imin ) Establish the equation of the straight line connecting the two;

[0080]

[0081] S39: Draw a straight line connecting the two in the three-dimensional coordinate system of space, and extend the straight line to intersect with the installation reference unit. The point after the intersection is used as the first connection point when installing the next curved glass curtain wall installation block to be installed. During the installation of the next curved glass curtain wall installation block to be installed, first connect it to the installation fixture below through the first connection point. After positioning is achieved, connect the other connection points to the installation fixture.

[0082] The present invention designs the installation position of each installation block of different curved glass curtain walls by constructing a model of the curved glass curtain wall and a model of the curtain wall installation plane in BIM software, and can realize accurate positioning, obtain the positioning coordinates of the installation position, and during the installation process of construction personnel, based on the designed installation sequence, can use the installation error of the previous curved glass curtain wall installation block to correct the connection point position of the curved glass curtain wall installation block to be installed, realize dynamic correction of the installation process, avoid the accumulation of errors leading to the reduction of the overall installation quality of the curved glass curtain wall, and simultaneously consider the stability of the curved glass curtain wall, can effectively improve the accuracy of glass curtain wall installation positioning, reduce construction and installation errors, improve construction efficiency, and reduce construction costs.

Claims

1. A BIM-based ellipsoidal curved glass curtain wall installation and positioning method, characterized in that: The following steps are involved: S1: According to the design parameters of the curtain wall installation plane, a curtain wall installation plane model and a curved glass curtain wall model are constructed in the BIM software, and correction constraints are constructed. The relative position between the curtain wall installation plane model and the curved glass curtain wall model is corrected in the three-dimensional spatial coordinate system to realize the correction of the overall installation position of the curved glass curtain wall model; S2: Use the size parameters of each curved glass curtain wall mounting block to evaluate the stability of the curved glass curtain wall mounting block and plan the connection points between the curved glass curtain wall mounting block and the mounting bracket; S3: The construction personnel install the curved glass curtain wall installation blocks on the curtain wall installation plane according to the planned installation sequence of the curved glass curtain wall installation blocks, and measure the coordinate error of the connection point of the last installed curved glass curtain wall installation block to correct the coordinate of the connection point of the next curved glass curtain wall installation block to be installed.

2. The BIM-based ellipsoidal curved glass curtain wall installation and positioning method according to claim 1, characterized in that: The step S1 comprises: S11: construct a curtain wall installation plane model in the BIM software according to the design parameters of the curtain wall installation plane, and construct a curved glass curtain wall model based on the design parameters of the curved glass curtain wall on the curtain wall installation plane model; S12: On the curved glass curtain wall model, evenly split it into n correction units, and evenly split the curtain wall installation plane model into n positioning units, construct a spatial three-dimensional coordinate system, and obtain the coordinates (x n ,y n ,z n )、(X n ,X n ,X n ) to ensure that the spatial three-dimensional coordinate system coincides with the three-dimensional coordinate system of the curved glass curtain wall construction site; S13: Calculate the distance between the center of the correction unit and the center of the corresponding positioning unit below, correct the relative position between the curved glass curtain wall model and the curtain wall installation plane model, and then correct the installation position of the entire curved glass curtain wall model, and the correction process satisfies the constraint conditions; Where A is the center coordinate set of the correction unit, N is the number of correction units, and d n～n-1 It is the straight-line distance between the centers of two adjacent positioning units determined from the design dimensions; S14: Complete the correction of the overall installation position of the curved glass curtain wall model.

3. The BIM-based ellipsoidal curved glass curtain wall installation and positioning method according to claim 2, characterized in that: The step S2 comprises: S21: splitting the curved glass curtain wall model into a number of installation reference units according to the design size of each curved glass curtain wall installation block; calculating the stability coefficient f of the corresponding curved glass curtain wall installation block according to the size parameters of each installation reference unit; Among them, β0 is the stress coefficient, β1 is the wind vibration coefficient, μ1 is the curved wind load body coefficient of the curved glass curtain wall installation block, μ2 is the wind pressure height variation coefficient corresponding to the installation height of the curved glass curtain wall installation block, ω0 is the basic wind pressure, b is the short side length of the curved glass curtain wall installation block, t is the thickness of the curved glass curtain wall installation block, σ0 is the maximum stress that the curved glass curtain wall installation block can withstand, α is the earthquake influence coefficient, M is the deadweight of the curved glass curtain wall installation block, γ is the gravity equivalent coefficient, ε1 and ε2 are the weight coefficients of the influence on the stability of the curved glass curtain wall installation block under the action of wind and earthquake, respectively, and F0 is the seismic stress of the curved glass curtain wall installation block; S22: Set the stability coefficient threshold f of the curved glass curtain wall installation block 阈值 ; If f≤f 阈值 , it is determined that the structural stability of the curved glass curtain wall mounting block meets the requirements, and the mounting brackets at the four top corners of the curved glass curtain wall mounting block have met the stability requirements; If f>f 阈值 , it is determined that the structural stability of the curved glass curtain wall mounting block does not meet the requirements, and it is necessary to add an installation bracket at the center point of the curved glass curtain wall mounting block to increase the structural stability of the curved glass curtain wall mounting block after installation.

4. The BIM-based ellipsoidal curved glass curtain wall installation and positioning method according to claim 3 is characterized in that: The step S3 comprises: S31: according to the planned connection points between the mounting bracket and the curved glass curtain wall mounting block, marking equivalent connection points at equivalent positions on the mounting reference unit, and obtaining the coordinates of each equivalent connection point; S32: After the overall installation position correction of the curved glass curtain wall model is completed, the installation coordinates of the installation frame of each curved glass curtain wall installation block on the curtain wall installation plane are obtained, and the installation frame is installed on the corresponding installation coordinates with reference to the construction three-dimensional coordinate system of the on-site construction; the installation frame uses the four vertex positions of each curved glass curtain wall installation block as connection points, and the installation frame is perpendicular to the curtain wall installation plane; S33: The construction personnel plan the installation sequence of the curved glass curtain wall installation blocks, install the curved glass curtain wall installation blocks on the curtain wall installation plane, and after the previous curved glass curtain wall installation block is installed, measure the coordinates (x0, y0, z0) of the actual connection point based on the construction three-dimensional coordinate system; S34: Calculate the coordinate difference value (Δx, Δy, Δz) between the coordinates of the actual connection point (x0, y0, z0) and the coordinates of the corresponding equivalent connection point (x′0, y′0, z′0) = (x0-x′0, y0-y′0, z0-z′0); S35: Calculate the distance between each equivalent connection point i and the actual connection point based on all equivalent connection points on the next curved glass curtain wall installation block to be installed (x i ,y i ,z i ) is the coordinate of the i-th equivalent connection point on the next curved glass curtain wall installation block to be installed, and the distance data set (d1, d2, …, d i ); S36: Filter out the distance data group (d1, d2, ..., d i ) in the minimum value d min The corresponding equivalent connection point coordinates (x imin ,y imin ,z imin ), according to the coordinate difference value (Δx, Δy, Δz), the coordinates of the equivalent connection point (x imin ,y imin ,z imin ) to obtain the corrected equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ); (x i ′ min ,y i ′ min ,z i ′ min )=(x i ′ min +Δx,y i ′ min +Δy,z i ′ min +Δz); S37: Determine the corrected equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed; if so, the next curved glass curtain wall installation block to be installed is located at the equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is the reference connection point, execute step S38; otherwise, execute step S310; S38: According to the coordinates of the reference connection point (x i ' min ,y i ' min ,z i ' min ) and the corresponding installation coordinates (X imin ,Y imin ,Z imin ) Establish the equation of the straight line connecting the two; S39: Draw a straight line where the connection line between the two is located in the three-dimensional coordinate system of the space, and extend the straight line to intersect with the installation reference unit, and the intersection point is used as the first connection point when installing the next curved glass curtain wall installation block to be installed. During the installation of the next curved glass curtain wall installation block to be installed, first connect it to the installation fixing frame below through the first connection point, and after positioning is achieved, connect the other connection points to the installation fixing frame; S310: Move the installation bracket to a position on the curtain wall installation plane, and connect the original connection point on the next curved glass curtain wall installation block to be installed to the installation bracket.

5. The BIM-based ellipsoidal curved glass curtain wall installation and positioning method according to claim 4, characterized in that: The determination of the coordinates of the equivalent connection points (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit: S371: Obtain the coordinates of m uniform points on the boundary of the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed (x m ,y m ,z m ), project all m points into the xoy plane, to the m projection point coordinates (x m ,y m ,0); S372: taking the maximum value and the minimum value of the coordinates of the m projection points as the area constraint conditions; S373: Equivalent connection point coordinates (x i ' min ,y i ' min ,z i ' min ) is also projected into the xoy plane to obtain the equivalent connection point projection coordinates (x i ' min ,y i ' min ,0); If x is satisfied imin ∈[x min ,x max ] and y imin [y min ,y max ], then determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is within the area enclosed by the installation reference unit corresponding to the next curved glass curtain wall installation block to be installed. Otherwise, determine the coordinates of the equivalent connection point (x i ' min ,y i ' min ,z i ' min ) is not within the area enclosed by the installation reference units corresponding to the next curved glass curtain wall installation block to be installed.

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