A mounting method suitable for complex multi-curved surface curtain wall

Abstract

This invention discloses an installation method suitable for complex multi-curved curtain walls, including factory pre-assembly and verification, modular disassembly and transportation, and on-site assembly and overall lifting. The factory pre-assembly and verification includes creating a BIM diagram, assembling the scattered keel and panels into a complete complex multi-curved curtain wall using a factory jig, and verifying errors by comparing the results with the BIM diagram using 3D laser scanning. The modular disassembly and transportation involves disassembling the complex multi-curved curtain wall into several modular units and transporting them to the construction site using transport jigs. The on-site assembly and overall lifting method includes erecting an on-site jig, assembling each modular unit on the jig to obtain a complete complex multi-curved curtain wall structure, and simultaneously lifting and installing the complex multi-curved curtain wall as a whole using multiple hoisting devices. This invention improves the installation quality and accuracy of complex multi-curved curtain walls.

Description

Technical Field

[0001] This invention relates to the field of building curtain wall construction technology, and in particular to an installation method suitable for complex multi-curved curtain walls. Background Technology

[0002] With the development of architectural aesthetics, complex multi-curved curtain walls are increasingly widely used in large public buildings. These curtain walls are characterized by complex shapes, high precision requirements, and significant construction challenges. Traditional curtain wall installation methods mainly fall into two categories: on-site assembly and small-unit assembly. On-site assembly typically requires full-scale scaffolding, involves a large amount of measurement work, is difficult to control precision, and is prone to problems such as uneven seams and discontinuous curved surfaces, making it difficult to guarantee the final installation effect. While small-unit assembly partially solves the precision problem, it involves long on-site operation time, poor coordination between units, and difficulty in guaranteeing the overall installation effect. Furthermore, due to the small unit size, on-site operation efficiency is low. In summary, existing installation technologies for complex multi-curved curtain walls largely rely on on-site measurement and installation adjustments, are greatly affected by environmental factors, have low installation precision, and lack verification processes, making it difficult to guarantee the final installation effect. Summary of the Invention

[0003] The purpose of this invention is to provide an installation method suitable for complex multi-curved curtain walls, in order to solve the problems of large auxiliary workload, large on-site measurement workload, difficulty in controlling installation accuracy, and easy occurrence of uneven joints and discontinuous curved surfaces caused by the on-site bulk assembly method, as well as the problems of low on-site operation efficiency, long cycle, poor coordination between units, and difficulty in ensuring the overall installation effect of complex multi-curved curtain walls caused by the small unit assembly method.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: an installation method suitable for complex multi-curved curtain walls, comprising the following steps: Factory pre-assembly and verification: A BIM drawing of the complex multi-curved curtain wall is created. By setting up a factory scaffold, the scattered keels and panels are assembled into a complete complex multi-curved curtain wall at the factory end. During the overall assembly process, the keels and panels at each position are scanned with 3D laser and the errors are verified with the corresponding keels and panels in the BIM drawing. Keels and panels with errors are reprocessed and then installed to obtain a high-precision complex multi-curved curtain wall. Modular disassembly and transportation: The complex multi-curved curtain wall, which is pre-assembled in the factory, is disassembled into several modular units. Each modular unit is matched with a specially designed and manufactured transport frame. Each modular unit is hoisted from the factory frame to the corresponding transport frame and transported to the construction site via the transport frame. On-site assembly and overall lifting method: On-site scaffolding is erected at the construction site, and the corresponding modular units on each transport scaffolding are assembled on-site to obtain a complex multi-curved curtain wall with a complete structure. The complex multi-curved curtain wall with a complete structure is then lifted and installed to the target position simultaneously by multiple hoisting devices.

[0005] Furthermore, the installation method for complex multi-curved curtain walls provided by this invention includes the following steps in the overall pre-assembly at the factory: Spatial positioning based on BIM drawings: Create BIM drawings of complex multi-curved curtain walls, and determine the spatial coordinates of each keel and each panel in the BIM drawings, as well as the joints between the panels. Precise factory frame erection: Factory frames are designed and manufactured according to BIM drawings to fit complex multi-curved curtain walls. Adjustable support points are set on the factory frames to adjust the installation of the keel of the complex multi-curved curtain wall and ensure the spatial positioning accuracy of the keel. Keel pre-assembly and welding: A truss-type keel is adopted. The keel truss is assembled and welded in sequence on the factory jig. The horizontal single truss keel is assembled first and fixed on the factory jig. Then the remaining keels are installed from bottom to top. When welding, I-type joint full penetration welding and T-type fillet weld are used. Flange node installation and stress relief: Flame cut notches at the predetermined disassembly positions, install flanges in pairs and weld them. After welding, first release the temporary bolts to release welding stress, then tighten the installation bolts, and install them sequentially from the center to both sides to ensure that the keel is evenly stressed. Panel pre-assembly: After the panel is processed, point cloud data is obtained by 3D laser scanning and compared with BIM drawing to verify the panel processing error. Panels within the allowable curvature error range are then installed on the keel at the corresponding position. Overall accuracy verification of curtain wall installation: The overall accuracy of the assembled complex multi-curved curtain wall is verified by three-dimensional laser scanning technology. Panels with joint accuracy exceeding the allowable joint error are reprocessed and then installed.

[0006] Furthermore, the installation method for complex multi-curved curtain walls provided by the present invention involves temporarily fixing the panel to the keel using the back-side corner brackets during panel pre-assembly, and then pulling it into place with the help of hoists and pulleys. The installation is done manually, with the installation sequence being from top to bottom and from the middle to both sides. A laser level and a total station are used in conjunction with reflective stickers to monitor and position the panel, ensuring accurate installation of the panel on the keel.

[0007] Furthermore, the installation method for complex multi-curved curtain walls provided by the present invention includes the following steps: Unit division: Based on BIM analysis and transportation conditions, the complex multi-curved curtain wall is divided into several modular units. Each modular unit contains a complete keel and panel with boundary connections. Disassembly after stress relief: First, disassemble the keel between the bulk panels and the modular units, and then gradually remove the top modular units, the side modular units, the lower modular units, and the bottom modular units in the order from top to bottom and from the middle to both sides. Design and transportation of specialized transport frames: Each modular unit is designed with a personalized transport frame to ensure that each modular unit does not deform during transportation; each modular unit is hoisted from the factory frame to the corresponding transport frame, and then transported to the construction site via the transport frame.

[0008] Furthermore, the installation method for complex multi-curved curtain walls provided by the present invention, in the disassembly after stress release, adopts a sliding method to slide outward through the factory jig and then lift and remove the bottom modular unit. Furthermore, the installation method for complex multi-curved curtain walls provided by the present invention includes a factory frame comprising a base plate, a steel foundation, a steel track, pulleys, and a frame body connected sequentially from bottom to top. The base plate is anchored to the ground by anchor bolts, and the frame body moves along the steel track by pulleys.

[0009] Furthermore, the installation method for complex multi-curved curtain walls provided by the present invention includes a track clamp plate connecting the steel foundation and the steel track, and a stiffening plate set on the steel foundation.

[0010] Furthermore, the installation method for complex multi-curved curtain walls provided by the present invention includes the following steps: On-site assembly frame erection and fine-tuning device installation: On-site frame identical to the factory frame is erected at the construction site. Fine-tuning devices consisting of jacks and stainless steel shims are installed on the on-site frame to finely adjust the elevation and level of the corresponding modular units. Unit sequential hoisting and flange connection: Using hoisting equipment, each modular unit transported by the transport jig is hoisted and installed on the site jig in the order from bottom to top and from the middle to both sides; the bottom modular unit is hoisted to the site jig and then slid into place, and then each modular unit is assembled from bottom to top. The attitude of the modular unit with the center of gravity offset is adjusted with the help of binding straps to ensure that the flanges are connected smoothly. Fine adjustment is made by fine adjustment device, and then the flanges are used to connect and fix it. Overall synchronous lifting: After all modular units are assembled on-site and verified by three-dimensional laser scanning, a complex multi-curved curtain wall is formed. Multiple hoisting devices are used to hoist the complex multi-curved curtain wall into place and install it in the target position in a synchronous manner. Loose-piece patching: Before or after the overall lifting and installation, local loose panels and matching rods are patched and installed.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides an installation method for complex multi-curved curtain walls. Through an integrated construction scheme encompassing factory pre-assembly, modular disassembly and transportation, and on-site assembly and overall lifting, the precision control of complex multi-curved curtain walls is pre-emptively achieved in the factory environment. By combining BIM diagrams with 3D laser scanning technology, high-precision pre-assembly and error verification of the keel and panels are realized at the factory, ensuring the installation quality of complex multi-curved curtain walls. This fundamentally guarantees the smoothness and uniformity of the final building surface and joints, effectively eliminating on-site rework and achieving extremely high-precision installation quality. The use of transport jigs allows for high-quality transportation of the corresponding modular units to the construction site, reducing structural deformation during transport. Furthermore, this integrated construction scheme transforms traditional high-altitude bulk assembly operations into ground-based modular unit assembly and overall lifting, ensuring the precision, quality, and safety of complex multi-curved curtain wall installation. This significantly reduces the amount of high-altitude work, lowers safety risks, and simultaneously shortens the construction period, improves construction efficiency, and reduces long-term occupation of on-site resources, resulting in good economic benefits. Attached Figure Description

[0012] Figure 1 This is a flowchart of an installation method applicable to complex, multi-curved curtain walls; Figure 2 This is a three-dimensional structural diagram of the factory jig and the complex multi-curved curtain wall installed on it from one perspective. Figure 3 This is a three-dimensional structural diagram of the factory jig and the complex multi-curved curtain wall installed on it from another perspective; Figure 4 This is a three-dimensional structural diagram of the installation disk node installation; Figure 5 It is a three-dimensional structural diagram of a complex, multi-curved curtain wall that is modularly disassembled; Figure 6 This is a schematic diagram of the bottom modular unit before the factory jig is removed, taken at one angle. Figure 7 This is a structural diagram of the bottom modular unit before the factory jig is removed, taken from another angle; Figure 8 This is a schematic diagram of the bottom modular unit sliding and being removed from the factory jig; Figure 9 This is a structural diagram of the factory's jig frame.

[0013] As shown in the figure: 1. Panel, 2. Keel, 3. Factory frame, 4. Flange, 5. Complex multi-curved curtain wall, 51-57 are units 1 to 7, 58. Keel. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0015] This invention provides an installation method suitable for complex multi-curved curtain walls, which solves the problems of large auxiliary workload, large on-site measurement workload, difficulty in controlling installation accuracy, and easy occurrence of uneven joints and discontinuous curved surfaces caused by the on-site bulk assembly method. It also solves the problems of low on-site operation efficiency, long cycle, poor coordination between units, and difficulty in ensuring the overall installation effect of complex multi-curved curtain walls caused by the small unit assembly method.

[0016] Please refer to Figure 1 The installation method for complex multi-curved curtain walls provided in this embodiment of the invention includes the following steps: Step 100, Factory Pre-assembly and Verification: A BIM model of the complex multi-curved curtain wall is created. Using a factory jig 3, the scattered keels 2 and panels 1 are assembled at the factory to form a complete complex multi-curved curtain wall 5. During the assembly process, the keels 2 and panels 1 at each location are scanned using 3D laser scanning and compared with the corresponding locations in the BIM model for error verification. Keels 2 and panels 1 with errors are reprocessed before installation, resulting in a high-precision complex multi-curved curtain wall 5. Specifically, this includes the following steps: Step 101, Spatial positioning based on BIM drawings: Establish BIM drawings of complex multi-curved curtain walls, and determine the spatial coordinates of each keel and each panel in the BIM drawings, as well as the joints between the panels.

[0017] Step 102, Precise Erection of Factory Formwork: Based on the BIM drawings, design and manufacture factory formwork 3 adapted to complex, multi-curved curtain walls, such as... Figures 2 to 3 As shown, adjustable support points are set on the factory jig 3 to adjust the installation of the keel 2 of the complex multi-curved curtain wall 5, ensuring the spatial positioning accuracy of the keel 2.

[0018] Step 103, Keel Pre-assembly and Welding: A truss-type keel is used. The keel trusses are assembled and welded sequentially on the factory jig 3. First, the transverse single truss keel 2 is assembled and fixed to the factory jig 3. Then, the remaining keels 2 are installed one by one from bottom to top. During welding, I-type joint full penetration welding (with backing) and T-type fillet welds are used. Figures 2 to 3 As shown.

[0019] Step 104, Flange Node Installation and Stress Relief: Flame-cut notches at the predetermined disassembly locations, install flanges 3 in pairs and weld them together, as shown below. Figure 4As shown, after welding, the temporary bolts are first released to relieve welding stress, and then the installation bolts are tightened. The installation is carried out sequentially from the center to both sides to ensure that the keel 2 is subjected to uniform stress.

[0020] Step 105, Panel Pre-assembly: After panel 1 is processed, point cloud data is obtained through 3D laser scanning and compared with the BIM drawing to verify the processing error of panel 1. Panel 1, within the allowable surface error range, is then installed on the keel 2 at the corresponding position, such as... Figures 2 to 3 As shown; specifically, panel 1 is temporarily fixed to keel 2 by the back corner brackets and lifting lugs, and pulled into place with the help of hoist pulleys. The installation is done manually, and the installation sequence is from top to bottom and from the middle to both sides. A laser level and a total station are used in conjunction with reflective stickers to monitor and position the panel 1 to ensure accurate installation on keel 2.

[0021] Step 106, Overall verification of curtain wall installation accuracy: The overall accuracy of the assembled complex multi-curved curtain wall 5 is verified by three-dimensional laser scanning technology. Panels 1 with joint accuracy exceeding the allowable joint error are reprocessed and then installed.

[0022] Step 200, Modular Disassembly and Transportation: The complex multi-curved curtain wall 5, pre-assembled in the factory, is modularly disassembled into several modular units. Each modular unit is matched with a specially designed and manufactured transport frame. Each modular unit is hoisted from the factory frame 3 onto the corresponding transport frame, and then transported to the construction site. Flange connection nodes that can release welding stress are used to achieve large-unit disassembly and rapid on-site assembly. Specifically, this includes: Step 201, Unit Division: Based on BIM analysis and transportation conditions, the complex multi-curved curtain wall 5 is divided into several modular units. Each modular unit contains a complete boundary-connected keel 2 and a panel 1, such as... Figure 5 As shown. Figure 5 The example illustrates the modularization of a complex, multi-curved curtain wall 5 into 14 units: units 1 through 7 and supporting members 58, where supporting members 58 are keel components. Unit 1 is the top modular unit 51, units 2 and 3 are the side modular units 52 and 53, units 4 and 5 are the lower modular units 54 and 55, and unit 6 is the bottom modular unit 56. Figure 5 This is just one example of symmetrical splitting.

[0023] Step 202, Disassembly after stress release: First, disassemble the keel or matching rods 58 between the bulk panel 1 and the modular unit. Then, disassemble the top modular unit, the side modular units, the lower modular unit, and the bottom modular unit in order from top to bottom and from the middle to both sides. Figure 2 , Figure 3 , Figures 6 to 9As shown; the bottom modular unit can be removed by sliding it outwards through the factory jig 3 and then lifting it off, as shown. Figures 7 to 8 As shown, this avoids structural deformation caused by direct hoisting.

[0024] Step 203, Design and transportation of dedicated transport frames: Each modular unit is designed with a personalized transport frame to ensure that each modular unit does not deform during transportation; each modular unit is hoisted from the factory frame 3 onto the corresponding transport frame, and the corresponding modular unit is transported to the construction site via the transport frame.

[0025] Step 300, On-site Assembly and Overall Lifting Method: An on-site scaffolding is erected at the construction site. The corresponding modular units from each transport scaffolding are assembled on-site to form the complete complex multi-curved curtain wall 5. Multiple hoisting devices are then used to simultaneously lift and install the complete complex multi-curved curtain wall 5 from the on-site scaffolding to the target location. Specifically, this includes: Step 301, On-site assembly of the jig and installation of the fine-tuning device: An on-site jig identical to the factory jig 3 is erected at the construction site. A fine-tuning device consisting of jacks and stainless steel shims is installed on the on-site jig to precisely adjust the elevation and level of the corresponding modular units. This fine-tuning device resolves installation positioning deviations.

[0026] Step 302, Sequential Lifting and Flange Connection of Units: Using lifting equipment, lift and install each modular unit transported on the transport frame onto the site frame in a sequence from bottom to top and from the middle to both sides; the bottom modular unit is slid into place after being lifted onto the site frame, such as KO8 to... Figure 7 As shown, the modular units are then assembled from bottom to top. The attitude of the modular units with the center of gravity offset is adjusted by the use of straps to ensure that the flange 3 is successfully connected. The fine adjustment is made by the fine-tuning device, and then the flange 3 is used to connect and fix them.

[0027] Step 303, Overall Synchronous Lifting: After all modular units are assembled on-site and verified by 3D laser scanning, a complex multi-curved curtain wall 5 is formed. Multiple hoisting devices are used to synchronously lift and install the complex multi-curved curtain wall 5 to the target location. The hoisting devices include, but are not limited to, tower cranes, truck cranes, and hoist cranes.

[0028] Step 304, patching of loose parts: Before or after the overall lifting and installation, patching and installing of local loose panels 1 and matching rods 58 is carried out.

[0029] Please refer to Figures 6 to 9To reduce structural deformation of the bottom modular units during disassembly and adapt to complex site conditions, this embodiment of the invention provides an installation method suitable for complex multi-curved curtain walls 5. The factory jig 3 includes a foundation plate 32, a steel foundation 33, a steel rail 35, pulleys 37, and a frame 38 connected sequentially from bottom to top. The foundation plate 32 is anchored to the ground by anchor bolts 31, and the frame 38 moves along the steel rail 35 via pulleys 37. To improve the structural strength of the factory jig 3, it also includes a rail clamping plate 36 connecting the steel foundation 33 and the steel rail 35, and a stiffening plate 34 mounted on the steel foundation 33. The steel foundation 33 is made of I-beams. The sliding and adjustment of the pulleys 37 relative to the steel rail 35 adapts to complex site conditions and increases the difficulty of disassembly and assembly.

[0030] The installation method for complex multi-curved curtain walls 5 provided in this invention integrates factory pre-assembly, modular disassembly and transportation, on-site assembly, and overall lifting into a unified construction scheme. This approach brings the precision control of the complex multi-curved curtain wall 5 to the factory environment. By combining BIM diagrams with 3D laser scanning technology, high-precision pre-assembly and error verification of the keel and panel 1 are achieved at the factory, ensuring the installation quality of the complex multi-curved curtain wall 5. This fundamentally ensures the smoothness and uniformity of the final building surface and joints, effectively eliminating on-site rework and achieving extremely high-precision installation quality. The transport jigs enable high-quality transportation of the corresponding modular units to the construction site, reducing structural deformation during transportation. Furthermore, this integrated construction scheme transforms traditional high-altitude bulk assembly operations into ground-based modular unit assembly and overall lifting, ensuring the precision, quality, and safety of the complex multi-curved curtain wall 5 installation. This significantly reduces the amount of high-altitude work, lowers safety risks, shortens the construction period, improves construction efficiency, and reduces long-term occupation of on-site resources, resulting in good economic benefits.

[0031] The installation method for complex multi-curved curtain walls 5 provided in this invention utilizes a technical concept of factory pre-assembly, modular disassembly and transportation, and on-site overall lifting and installation. It employs innovative flange nodes that release welding stress for modular disassembly and a specially designed transport jig to ensure no deformation during transport. On-site, fine-tuning devices enable rapid and precise positioning and assembly of units, and multiple synchronous hoisting devices are used for overall lifting. This approach resolves complex issues in advance at the factory, achieving efficient and high-precision installation on-site through modular and integrated operations. Its technical benefits are not only reflected in the comprehensive improvement of quality, efficiency, and safety, but also in providing a replicable and scalable advanced method for constructing complex building curtain walls. This effectively addresses the challenges of controlling installation precision, long construction cycles, and high safety risks associated with large, complex, multi-curved curtain walls, achieving efficient and high-precision installation. It significantly enhances the controllability and adaptability of the construction process and effectively solves various uncertainties encountered in complex construction sites.

[0032] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A method for installing a complex multi-curved curtain wall, comprising: Includes the following steps: Factory pre-assembly and verification: A BIM drawing of the complex multi-curved curtain wall is created. By setting up a factory scaffold, the scattered keels and panels are assembled into a complete complex multi-curved curtain wall at the factory end. During the overall assembly process, the keels and panels at each position are scanned with 3D laser and the errors are verified with the corresponding keels and panels in the BIM drawing. Keels and panels with errors are reprocessed and then installed to obtain a high-precision complex multi-curved curtain wall. Modular disassembly and transportation: The complex multi-curved curtain wall, which is pre-assembled in the factory, is disassembled into several modular units. Each modular unit is matched with a specially designed and manufactured transport frame. Each modular unit is hoisted from the factory frame to the corresponding transport frame and transported to the construction site via the transport frame. On-site assembly and overall lifting method: On-site scaffolding is erected at the construction site, and the corresponding modular units on each transport scaffolding are assembled on-site to obtain a complex multi-curved curtain wall with a complete structure. The complex multi-curved curtain wall with a complete structure is then lifted and installed to the target position simultaneously by multiple hoisting devices.

2. The installation method for complex multi-curved curtain walls according to claim 1, characterized in that, The overall pre-assembly process in the factory includes the following steps: Spatial positioning based on BIM drawings: Create BIM drawings of complex multi-curved curtain walls, and determine the spatial coordinates of each keel and each panel in the BIM drawings, as well as the joints between the panels. Precise factory frame erection: Factory frames are designed and manufactured according to BIM drawings to fit complex multi-curved curtain walls. Adjustable support points are set on the factory frames to adjust the installation of the keel of the complex multi-curved curtain wall and ensure the spatial positioning accuracy of the keel. Keel pre-assembly and welding: A truss-type keel is adopted. The keel truss is assembled and welded in sequence on the factory jig. The horizontal single truss keel is assembled first and fixed on the factory jig. Then the remaining keels are installed from bottom to top. When welding, I-type joint full penetration welding and T-type fillet weld are used. Flange node installation and stress relief: Flame cut notches at the predetermined disassembly positions, install flanges in pairs and weld them. After welding, first release the temporary bolts to release welding stress, then tighten the installation bolts, and install them sequentially from the center to both sides to ensure that the keel is evenly stressed. Panel pre-assembly: After the panel is processed, point cloud data is obtained by 3D laser scanning and compared with BIM drawing to verify the panel processing error. Panels within the allowable curvature error range are then installed on the keel at the corresponding position. Overall accuracy verification of curtain wall installation: The overall accuracy of the assembled complex multi-curved curtain wall is verified by three-dimensional laser scanning technology. Panels with joint accuracy exceeding the allowable joint error are reprocessed and then installed.

3. The installation method for complex multi-curved curtain walls according to claim 2, characterized in that, During panel pre-assembly, the panels are temporarily fixed to the keel using the back-side corner brackets and lifting lugs. They are then pulled into place using hoists and pulleys, with manual assistance during installation. The installation sequence is from top to bottom and from the middle to both sides. A laser level and a total station are used in conjunction with reflective stickers to monitor and position the panels, ensuring accurate installation on the keel.

4. The installation method for complex multi-curved curtain walls according to claim 1, characterized in that, Includes the following steps: Unit division: Based on BIM analysis and transportation conditions, the complex multi-curved curtain wall is divided into several modular units. Each modular unit contains a complete keel and panel with boundary connections. Disassembly after stress relief: First, disassemble the keel between the bulk panels and the modular units, and then gradually remove the top modular units, the side modular units, the lower modular units, and the bottom modular units in the order from top to bottom and from the middle to both sides. Design and transportation of specialized transport frames: Each modular unit is designed with a personalized transport frame to ensure that each modular unit does not deform during transportation; each modular unit is hoisted from the factory frame to the corresponding transport frame, and then transported to the construction site via the transport frame.

5. The installation method for complex multi-curved curtain walls according to claim 4, characterized in that, During disassembly after stress relief, the bottom modular unit is removed by sliding it outwards through the factory jig and then being lifted off the ground.

6. The installation method for complex multi-curved curtain walls according to claim 5, characterized in that, The factory frame includes a base plate, a steel foundation, a steel rail, pulleys, and a frame body connected in sequence from bottom to top. The base plate is anchored to the ground by anchor bolts, and the frame body moves along the steel rail by pulleys.

7. The installation method for complex multi-curved curtain walls according to claim 6, characterized in that, The factory jig also includes a track plate connecting the steel foundation and the steel rail, and a stiffening plate set on the steel foundation.

8. The installation method for complex multi-curved curtain walls according to claim 1, characterized in that, The on-site assembly and overall lifting method includes the following steps: On-site assembly frame erection and fine-tuning device installation: On-site frame identical to the factory frame is erected at the construction site. Fine-tuning devices consisting of jacks and stainless steel shims are installed on the on-site frame to finely adjust the elevation and level of the corresponding modular units. Unit sequential hoisting and flange connection: Using hoisting equipment, each modular unit transported by the transport jig is hoisted and installed on the site jig in the order from bottom to top and from the middle to both sides; the bottom modular unit is hoisted to the site jig and then slid into place, and then each modular unit is assembled from bottom to top. The attitude of the modular unit with the center of gravity offset is adjusted with the help of binding straps to ensure that the flanges are connected smoothly. Fine adjustment is made by fine adjustment device, and then the flanges are used to connect and fix it. Overall synchronous lifting: After all modular units are assembled on-site and verified by three-dimensional laser scanning, a complex multi-curved curtain wall is formed. Multiple hoisting devices are used to hoist the complex multi-curved curtain wall into place and install it in the target position in a synchronous manner. Loose-piece patching: Before or after the overall lifting and installation, local loose panels and matching rods are patched and installed.

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