A formwork system for a high-altitude cantilever platform and its construction method

Abstract

This invention relates to a high-altitude cantilever platform formwork system and its construction method. The high-altitude cantilever platform formwork system includes a triangular truss support structure, a formwork support frame, and a platform formwork. The triangular truss support structure is fixed to the building wall below the construction position of the cantilever platform. The horizontal circumferential coverage area of ​​the triangular truss support structure along the building wall is not less than the horizontal circumferential coverage area of ​​the cantilever platform construction position along the building wall. The formwork support frame is installed on the triangular truss support structure, and the platform formwork is detachably connected to the top of the formwork support frame. This invention's high-altitude cantilever platform formwork system can be used as a formwork and support system for the construction of high-altitude and ultra-high-altitude cantilever platform structures in building engineering. It innovatively achieves safety, feasibility, and economy in the construction of high-altitude and ultra-high-altitude cantilever platform structures, effectively improving the poor stability, feasibility, and economy of conventional high-altitude and ultra-high-altitude cantilever platform structure formwork systems.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a high-altitude cantilever platform formwork system and its construction method. Background Technology

[0002] In urban architecture, buildings are increasingly emphasizing aesthetic appeal, uniqueness, and iconic status, leading to a rise in high-altitude and ultra-high-altitude cantilever structures. This is particularly evident in towers and landmark buildings, where architecture no longer solely prioritizes practicality but seeks to present diverse aesthetics through different external effects or functional requirements, especially in public landmark buildings. However, these high-altitude and ultra-high-altitude cantilever structures often present significant construction challenges. Conventional ground-based formwork support systems are not only unsafe and unstable but also involve long construction periods, massive erection and dismantling work, and high overall costs. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides a high-altitude cantilever platform formwork system and its construction method.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a high-altitude cantilever platform formwork system, including a triangular truss support structure, a formwork support frame and a platform formwork, wherein the triangular truss support structure is fixed on the building wall below the construction position of the cantilever platform, and the horizontal circumferential coverage area of ​​the triangular truss support structure along the building wall is not less than the horizontal circumferential coverage area of ​​the construction position of the cantilever platform along the building wall, the formwork support frame is installed on the triangular truss support structure, and the platform formwork is detachably connected to the top of the formwork support frame.

[0005] The beneficial effects of this invention are as follows: The high-altitude cantilever platform formwork system of this invention can be used as a formwork and support system for the construction of high-altitude and ultra-high-altitude cantilever platform structures in building engineering. It innovatively improves the safety, feasibility, and economy of high-altitude and ultra-high-altitude cantilever platform structure construction, effectively improving the poor stability, feasibility, and economy of conventional high-altitude and ultra-high-altitude cantilever platform structure formwork systems. Simultaneously, the high-altitude and ultra-high-altitude cantilever platform formwork units can be factory-processed and reused, offering advantages in simplified construction and cost savings. The high-altitude cantilever platform formwork system of this invention has a safer and more stable overall structure, while also being simple to manufacture and easy to operate. Especially when supporting the triangular truss of the high-altitude and ultra-high-altitude cantilever platform formwork, only simple training is required; simply knowing how to handle bolts is sufficient to achieve the fixed installation of the triangular truss supporting the formwork. Because it is factory-processable and reusable, it does not occupy actual on-site construction time and also significantly saves steel.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the triangular truss support structure includes multiple triangular trusses arranged horizontally around the building wall; each triangular truss includes horizontal bars, vertical bars, and diagonal bars, which are connected to each other to form a right-angled triangle structure. The vertical bars are fixed to the building wall, the horizontal bars extend horizontally away from the building wall, and the diagonal bars are located below the horizontal bars.

[0008] The beneficial effects of adopting the above-mentioned further solution are: the triangular truss adopts a right-angled triangular structure, which can achieve a stable and effective connection and fixation with the building wall, and can provide effective support for the construction of the formwork support frame and platform formwork on it.

[0009] Furthermore, the horizontal, vertical, and diagonal members of the triangular truss are detachably connected by bolts, and a protective steel pipe frame is provided at the end of the horizontal member away from the building wall.

[0010] The beneficial effect of adopting the above-mentioned further solutions is that the installation of protective steel pipe scaffolds can further enhance the safety protection of construction workers.

[0011] Furthermore, the protective steel pipe frame is horizontally connected and fixed to the building wall via a first tie steel pipe.

[0012] The beneficial effect of adopting the above-mentioned further solution is that it further enhances the safety and fixation effect.

[0013] Furthermore, one end of the inclined rod is provided with a plug-in plate, and the other end of the inclined rod is provided with two parallel and spaced socket plates. The two ends of the vertical rod are U-shaped sockets. One end of the horizontal rod is inserted into the U-shaped socket at the upper end of the vertical rod and fixed with bolts. The plug-in plate at one end of the inclined rod is inserted into the U-shaped socket at the lower end of the vertical rod and fixed with bolts. The two socket plates at the other end of the inclined rod are respectively clamped on the upper side of the outer side wall of the middle part of the horizontal rod and fixed with bolts.

[0014] The beneficial effect of adopting the above-mentioned further solution is that it allows the diagonal bars, vertical bars and horizontal bars to be detachably connected by bolts, which facilitates reuse.

[0015] Furthermore, multiple rows of horizontal beams are fixed above the triangular truss support structure. The horizontal beams are arranged at intervals from the root of the cantilever platform construction position towards the cantilever end, and scaffold boards are laid on the multiple rows of horizontal beams. The formwork support frame is provided on the scaffold board, and the formwork support frame is connected and fixed to the building wall in the horizontal direction.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by setting up crossbeams and installing scaffold boards on the crossbeams, the structural stability is improved.

[0017] Furthermore, all the uprights of the template support frame rest on the scaffold boards at the corresponding positions directly above the crossbeams.

[0018] The beneficial effect of adopting the above-mentioned further solution is that it can provide effective and stable support for the support points of the template support frame.

[0019] Furthermore, the template support frame is horizontally connected and fixed to the building wall via a second tie steel pipe.

[0020] The beneficial effects of adopting the above-mentioned further solutions are: further fixing the formwork support frame to the building wall, making the construction structure more robust, and improving the safety of construction workers.

[0021] Furthermore, the platform template includes a base plate and main keels and secondary keels arranged in a crisscross pattern. The main keels extend in a direction away from the building wall, the secondary keels are laid on top of the main keels, and the base plate is placed on the secondary keels. The top of the template support frame is detachably connected to a U-shaped bracket, which is supported on the main keel.

[0022] A construction method for the above-mentioned high-altitude cantilever platform formwork system involves first installing a triangular truss support structure on the lowest suspended platform of the climbing scaffold system on the building wall. After the triangular truss support structure is installed, the suspended platform of the climbing scaffold system is cut off, leaving the suspended platform on the triangular truss support structure, and then the upper climbing scaffold system is continued to be lifted.

[0023] A horizontal beam is laid from the root of the cantilever platform construction position along the building wall to the cantilever end on the triangular truss support structure. Scaffold boards are laid on the horizontal beam, and a formwork support frame is installed on the scaffold boards. Platform formwork is then set at the cantilever platform construction position on the building wall corresponding to the formwork support frame. The cantilever platform is then constructed at the platform formwork.

[0024] By pre-reserving holes for the wire rope of the suspended platform, the suspended platform can be suspended through the pre-reserved holes to achieve construction on the surface of the building wall.

[0025] The beneficial effects of this invention are: the construction method of this invention provides a method for implementing a high-altitude and ultra-high-altitude cantilever platform formwork system under a climbing formwork system. With the help of the climbing formwork system, the safety is higher, it can be reused, and it has the advantages of simplified construction and cost savings. Attached Figure Description

[0026] Figure 1 This is a top view schematic diagram of a high-altitude cantilever platform frame system according to an embodiment of the present invention;

[0027] Figure 2 This is a partial top view of the formwork system of a high-altitude cantilever platform according to an embodiment of the present invention;

[0028] Figure 3 This is a side view of a triangular truss and climbing frame system according to an embodiment of the present invention;

[0029] Figure 4 This is a side view of a triangular truss, template support frame, and platform template according to an embodiment of the present invention.

[0030] Figure 5 This is a side view schematic diagram of the construction of a triangular truss according to an embodiment of the present invention. Figure 1 ;

[0031] Figure 6 This is a side view schematic diagram of the construction of a triangular truss according to an embodiment of the present invention. Figure 2 ;

[0032] Figure 7 This is a side view schematic diagram of the construction of a triangular truss according to an embodiment of the present invention. Figure 3 ;

[0033] Figure 8 This is a schematic diagram of the specific structure of the triangular truss of the present invention;

[0034] Figure 9 This is a schematic diagram of the diagonal rod of the present invention;

[0035] Figure 10 This is a schematic diagram of the vertical rod structure of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the suspended platform of the present invention, which is set up after the construction is completed.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Triangular truss; 11. Horizontal bar; 12. Vertical bar; 13. Diagonal bar; 14. Protective steel pipe frame; 15. High-strength bolt; 16. Insert plate; 17. Socket plate; 18. U-shaped socket; 19. Crossbeam; 190. First tie steel pipe;

[0039] 2. Template support frame; 21. Upright pole; 22. Second tie steel pipe;

[0040] 3. Platform template; 31. Base plate; 32. Main keel; 33. Secondary keel; 34. U-shaped bracket;

[0041] 4. Cantilever platform; 41. Wire rope pre-drilled holes for suspended platform; 5. Climbing scaffold system; 51. Suspended platform;

[0042] 6. Building walls; 7. Bolts; 8. Scaffold boards; 9. Suspended platforms. Detailed Implementation

[0043] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0044] The building walls of this invention can be either tower-like structures (such as television towers) or flat-wall structures. Regardless of whether it's a circular tower or a flat-wall structure, the cantilevered platform formwork system of this invention can be used. The only difference is the horizontal range along the circumference of the building wall. For tower-like structures, a ring of cantilevered platform formwork is installed around the circumference of the building wall, while for flat-wall structures, only a cantilevered platform formwork system with sufficient coverage length needs to be installed on one side of the building wall. The cantilevered platform formwork system of this invention is mainly used for high-altitude or ultra-high-altitude buildings in architecture.

[0045] The accompanying drawings in this embodiment illustrate the use of a cantilevered platform on a tower-like building as an example. Figures 1-10 As shown, this embodiment of a cantilever platform formwork system includes a triangular truss support structure, a formwork support frame 2, and a platform formwork 3. The triangular truss support structure is fixed to the building wall 6 below the construction position of the cantilever platform 4. The horizontal circumferential coverage area of ​​the triangular truss support structure along the building wall 6 is not less than the horizontal circumferential coverage area of ​​the construction position of the cantilever platform 4 along the building wall 6. The formwork support frame 2 is installed on the triangular truss support structure, and the platform formwork 3 is detachably connected to the top of the formwork support frame 2. For tower-type building walls 6, a triangular truss support system can be set around the perimeter of the building wall 6.

[0046] like Figure 1 As shown, the triangular truss support structure in this embodiment includes multiple triangular trusses 1, which are arranged horizontally along the building wall 6. Each triangular truss 1 includes horizontal members 11, vertical members 12, and diagonal members 13. The horizontal members 11, vertical members 12, and diagonal members 13 are interconnected to form a right-angled triangle structure. The vertical members 12 are fixed to the building wall 6.

[0047] Rod 11 extends horizontally away from the building wall 6, and the diagonal rod 13 is located below the horizontal rod 11. The triangular truss adopts a right-angled triangular structure, which can achieve stability with the building wall.

[0048] Effective connection and fixation can provide effective support for the construction of the template support frame and platform template.

[0049] like Figures 8-10 As shown, the horizontal bar 11, vertical bar 12, and diagonal bar 13 of the triangular truss 1 are detachably connected by bolts 7. The horizontal bar 11 is away from the building wall 6.

[0050] A protective steel pipe frame 14 is provided at one end. The installation of the protective steel pipe frame can further enhance the safety protection of construction workers. The vertical rod 12 is fixedly connected to the building wall 6 by high-strength bolts 15.

[0051] like Figure 2 and Figure 4 As shown, in this embodiment, the protective steel pipe frame 14 is connected and fixed to the building wall 6 in the horizontal direction by the first tie steel pipe 190, which further achieves the effect of safety fixation.

[0052] like Figure 9 and Figure 10 As shown, in this embodiment, one end of the inclined rod 13 is provided with a connector plate 16.

[0053] The other end of the diagonal rod 13 is provided with two parallel and spaced socket plates 17. The two ends of the vertical rod 125 are U-shaped sockets 18. One end of the horizontal rod 11 is inserted into the U-shaped socket 18 at the upper end of the vertical rod 12 and fixed with bolts 7. The socket plate 16 at one end of the diagonal rod 13 is inserted into the U-shaped socket 18 at the lower end of the vertical rod 12 and fixed with bolts 7. The two socket plates 17 at the other end of the diagonal rod 13 are respectively clamped on the upper side of the outer side wall of the middle part of the horizontal rod 11 and fixed with bolts 7.

[0054] Fixed. The diagonal, vertical, and horizontal members are detachably connected by bolts for easy reusability.

[0055] Triangular trusses are arranged around the lower part of the high-altitude and ultra-high-altitude cantilever platforms, with the specific spacing determined through design calculations. The vertical members 12 connecting the triangular truss 1 to the building wall 6 can be double 10# members.

[0056] The channel steel, diagonal bar 13 can be made of double 10# channel steel, and horizontal bar 11 can be made of double 14# channel steel. The members of the triangular truss 1 are fabricated by welding, and the members are connected to each other by bolts 5 and 7. A steel plate is welded to the vertical bar 12 at the location where the high-strength bolt 15 will be installed, with a central opening for the installation of the high-strength bolt 15. The steel plate is fixed to the building wall 6 using the high-strength bolt 15. Specifically, through-wall sleeves can be pre-embedded in the building wall 6, with foam used to seal and padded the gap between the sleeves and the formwork on both sides. The pre-embedded through-wall sleeves must be treated for corrosion and rust prevention. Then, the high-strength bolts 15 are passed through the through-wall sleeves for connection and fixation.

[0057] like Figure 2 and Figure 4As shown, in this embodiment, multiple rows of horizontal beams 19 are fixed above the triangular truss support structure. These beams 19 are spaced apart along the base of the cantilever platform 4 towards the cantilever end, and scaffold boards 8 are laid on the horizontal beams 19. The formwork support frame 2 is mounted on the scaffold boards 8 and is horizontally connected and fixed to the building wall 6. By setting horizontal beams and installing scaffold boards on them, the structural stability is improved. The horizontal beams laid on adjacent triangular trusses 1 are connected using #14 I-beam bolts.

[0058] like Figure 4 As shown, in this embodiment, all the uprights 21 of the template support frame 2 rest on the corresponding scaffold boards 8 directly above the crossbeam 19. This provides effective and stable support for the support points of the template support frame.

[0059] like Figure 2 As shown, in this embodiment, the formwork support frame 2 is horizontally connected and fixed to the building wall 6 via a second tie steel pipe 22. Further fixing the formwork support frame 2 to the building wall 6 makes the construction structure more robust and improves the safety of construction workers. The formwork support frame 2 can be a portal scaffold or other types of scaffolding, with its longitudinal and transverse spacing and step distance determined through design calculations. Steel pipe coupler scaffolding safety guardrails and fully enclosed dense safety netting can be installed on the outer side of the formwork support frame 2.

[0060] like Figure 4 As shown, the platform template 3 in this embodiment includes a base plate 31 and main keels 32 and secondary keels 33 arranged in a crisscross pattern. The main keels 32 extend away from the building wall 6, and the secondary keels 33 are laid on top of the main keels 32. The base plate 31 is placed on the secondary keels 33. The top of the template support frame 2 is detachably connected to a U-shaped bracket 34, which supports the main keels 32. Each main keel 32 supports one U-shaped bracket 34. The platform template 3 can use multi-layer wooden templates as template panels and square timber as main and secondary keels. Both main and secondary keels are placed vertically, and their spacing is determined by design calculations. The main and secondary keels are firmly fixed together with steel nails, and the secondary keels are fixed to the template panels with tight and flat joints. The base plate serves as a base for the uprights in the upper and lower template support system of the upper cantilever platform, increasing the contact area between the lower part of the uprights and the structure, and avoiding local damage to the lower solid structure.

[0061] This embodiment of the high-altitude cantilever platform formwork system can be used as a formwork and support system for the construction of high-altitude and ultra-high-altitude cantilever platform structures in building engineering. It innovatively improves the safety, feasibility, and economy of high-altitude and ultra-high-altitude cantilever platform structure construction, effectively improving the poor stability, feasibility, and economy of conventional high-altitude and ultra-high-altitude cantilever platform structure formwork systems. Furthermore, the high-altitude and ultra-high-altitude cantilever platform formwork units can be factory-processed and reused, offering advantages in simplified construction and cost savings. The high-altitude cantilever platform formwork system of this invention has a safer and more stable overall structure, while also being simple to manufacture and easy to operate. In particular, when supporting the triangular truss of the high-altitude and ultra-high-altitude cantilever platform formwork, only simple training is required; simply knowing how to handle bolts is sufficient to achieve the fixed installation of the triangular truss supporting the formwork. Because it is factory-processable and reusable, it does not occupy actual on-site construction time and also significantly saves steel.

[0062] This embodiment also provides a construction method for the above-mentioned high-altitude cantilever platform formwork system, such as... Figures 5-7 As shown, the triangular truss support structure is first installed on the lowest suspended platform of the climbing scaffold system 5 on the building wall 6. After the triangular truss support structure is installed, the suspended platform 51 of the climbing scaffold system 5 is cut off, so that the suspended platform 51 remains on the triangular truss support structure. Then the upper climbing scaffold system 5 is lifted.

[0063] A horizontal beam 19 is laid from the root of the cantilever platform construction position on the building wall 6 to the cantilever end on the triangular truss support structure. Scaffold boards 8 are laid on the horizontal beam 19. A formwork support frame 2 is installed on the scaffold boards 8. A platform formwork 3 is set at the cantilever platform 4 construction position on the building wall 6 corresponding to the formwork support frame 2. The cantilever platform 4 is constructed at the platform formwork 3.

[0064] like Figure 11 As shown, a pre-drilled hole 41 for the wire rope of the suspended platform 4 is reserved on the platform 4. The suspended platform 9 can be suspended through the pre-drilled hole 41 to carry out construction on the surface of the building wall 6.

[0065] Specifically, the triangular truss support system is installed using the hydraulic platform and suspended platform at the bottom of the climbing scaffold system 5 as the installation platform. High-strength through-wall bolts are used to anchor the formwork support frame to the building wall, with one anchor point for each truss. When starting the installation of the triangular truss, a tower crane is used to hoist the assembled triangular truss to the outside of the climbing scaffold. The outer protective cover of the climbing scaffold system is opened, and a chain hoist is used to place the triangular truss at the pre-embedded steel pipe position, tightening the high-strength bolts to secure it. After all the triangular trusses are installed, circumferential beams are laid on the tripod trusses at 600mm intervals, and 50mm thick scaffold boards are fully laid on top, along with the formwork support frame system. To facilitate disassembly, the bolts between the triangular trusses and the circumferential beams are pre-set during processing, with corresponding holes left. Large through-wall bolts at the wall attachment points are inserted from the outside in and tightened on the inside of the wall. During dismantling, the formwork joists and beams on the triangular trusses are removed alternately, starting from the far end of the cantilever platform exit and proceeding along both sides. Transported from the cantilever platform exit to the building interior, during dismantling, ropes are tied to pre-designed positions on the triangular truss. It is then secured to the cantilever platform via pre-drilled holes for the external hanging basket and the outer edge of the platform, preparing for final dismantling. The beams are dismantled by personnel on top, secured by ropes, with lower personnel assisting. The final dismantling of the triangular truss utilizes a triangular support rod on the cantilever platform, with ropes connected to the truss via pulleys. Personnel inside the building push the triangular truss out, while personnel on the platform slowly release it using pre-set safety ropes until the support rod is fully stressed, then it is lifted to the platform edge and hoisted to the ground floor by a winch.

[0066] In this construction method, operators first construct the high-altitude and ultra-high-altitude cantilever platform formwork system from the bottom up, consisting of a triangular truss support system, a formwork support frame system, and the formwork system itself. The construction proceeds layer by layer from bottom to top, following the structure of the high-altitude and ultra-high-altitude cantilever platform formwork system. During implementation, attention should be paid to electrical safety and working at heights, and personal protective measures for operators must be strictly implemented. This construction method, by utilizing the high-altitude and ultra-high-altitude cantilever platform formwork system formed by the triangular truss support system, formwork support frame system, and formwork system, improves upon the poor stability, feasibility, and economic efficiency of conventional high-altitude and ultra-high-altitude cantilever platform structure formwork systems, while significantly enhancing safety and stability. It also greatly improves the construction quality and effect of high-altitude and ultra-high-altitude cantilever platform structures. Furthermore, it is convenient to construct, simple to operate, reusable, and can be prefabricated, effectively improving work efficiency and saving resources and construction time.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A construction method for a high-altitude cantilever platform formwork system, characterized in that, The high-altitude cantilever platform formwork system includes a triangular truss support structure, a formwork support frame, and a platform formwork. The triangular truss support structure is fixed to the building wall below the construction position of the cantilever platform. The horizontal circumferential coverage area of ​​the triangular truss support structure along the building wall is not less than the horizontal circumferential coverage area of ​​the construction position of the cantilever platform along the building wall. The formwork support frame is installed on the triangular truss support structure, and the platform formwork is detachably connected to the top of the formwork support frame. The construction method includes the following steps: First, install the triangular truss support structure on the lowest suspended platform of the climbing scaffolding system on the building wall. After the triangular truss support structure is installed, cut off the suspended platform of the climbing scaffolding system, leaving the suspended platform on the triangular truss support structure, and then continue to lift the upper climbing scaffolding system. A horizontal beam is laid from the root of the cantilever platform construction position along the building wall to the cantilever end on the triangular truss support structure. Scaffold boards are laid on the horizontal beam, and a formwork support frame is installed on the scaffold boards. Platform formwork is then set at the cantilever platform construction position on the building wall corresponding to the formwork support frame. The cantilever platform is then constructed at the platform formwork. By pre-reserving holes for the steel wire rope of the suspended platform, the suspended platform can be suspended through the pre-reserved holes to realize the construction of the building wall surface; The triangular truss support system is installed using the hydraulic platform and hanging platform at the bottom of the climbing scaffold system. High-strength through-wall bolts are used to anchor the formwork support frame to the building wall, with one anchor point for each truss. When starting the installation of the triangular truss, a tower crane is used to hoist the assembled triangular truss to the outside of the climbing scaffold. The outer protective cover of the climbing scaffold system is opened, and a chain hoist is used to place the triangular truss at the pre-embedded steel pipe position, tightening the high-strength bolts to secure it. After all triangular trusses are installed, circumferential beams are laid on the triangular trusses, and scaffold boards are fully laid, while the formwork support frame system is laid on top. Bolts between the triangular trusses and the circumferential beams are pre-set during processing, with holes left at corresponding positions. Large through-wall bolts at the wall attachment points are inserted from the outside in and tightened on the inside of the wall. During dismantling, the formwork joists and crossbeams on the triangular truss are removed alternately, starting from the far end of the cantilever platform exit and proceeding along both sides. The truss is transported from the cantilever platform exit to the building interior. During dismantling, ropes are tied to pre-set positions on the triangular truss and secured to the cantilever platform via pre-reserved external hanging basket holes and the outer edge of the cantilever platform, preparing for final dismantling. The crossbeams are dismantled by personnel on top, protected by ropes, with lower personnel assisting in the dismantling. The final dismantling of the triangular truss involves a triangular support rod installed on the cantilever platform, with ropes connected to the triangular truss via pulleys. Personnel inside the building push the triangular truss out, while personnel on the platform slowly release it using pre-set safety ropes until the triangular support rod is fully stressed, then it is lifted to the edge of the platform and hoisted to the ground floor by a winch.

2. The construction method of the high-altitude cantilever platform formwork system according to claim 1, characterized in that, The triangular truss support structure includes multiple triangular trusses arranged horizontally around the building wall. Each triangular truss includes horizontal members, vertical members, and diagonal members, which are connected to form a right-angled triangle structure. The vertical members are fixed to the building wall, the horizontal members extend horizontally away from the building wall, and the diagonal members are located below the horizontal members.

3. The construction method of the high-altitude cantilever platform formwork system according to claim 2, characterized in that, The horizontal, vertical, and diagonal members of the triangular truss are detachably connected by bolts, and a protective steel pipe frame is provided at the end of the horizontal member away from the building wall.

4. The construction method of the high-altitude cantilever platform formwork system according to claim 3, characterized in that, The protective steel pipe frame is horizontally connected and fixed to the building wall via a first tie steel pipe.

5. The construction method of the high-altitude cantilever platform formwork system according to claim 2, characterized in that, One end of the diagonal rod is provided with a plug-in plate, and the other end of the diagonal rod is provided with two parallel and spaced socket plates. The two ends of the vertical rod are U-shaped sockets. One end of the horizontal rod is inserted into the U-shaped socket at the upper end of the vertical rod and fixed with bolts. The plug-in plate at one end of the diagonal rod is inserted into the U-shaped socket at the lower end of the vertical rod and fixed with bolts. The two socket plates at the other end of the diagonal rod are respectively clamped on the upper side of the outer side wall of the middle part of the horizontal rod and fixed with bolts.

6. The construction method of the high-altitude cantilever platform formwork system according to claim 1, characterized in that, Multiple rows of horizontal beams are fixed above the triangular truss support structure. The horizontal beams are arranged at intervals from the root of the cantilever platform to the cantilever end. Scaffold boards are laid on the multiple rows of horizontal beams. The formwork support frame is provided on the scaffold board and is connected and fixed to the building wall in the horizontal direction.

7. The construction method of the high-altitude cantilever platform formwork system according to claim 6, characterized in that, All the uprights of the template support frame rest on the scaffold boards at the corresponding positions directly above the crossbeams.

8. The construction method of the high-altitude cantilever platform formwork system according to claim 6, characterized in that, The template support frame is horizontally connected and fixed to the building wall via a second tie steel pipe.

9. The construction method of the high-altitude cantilever platform formwork system according to claim 1, characterized in that, The platform template includes a base plate and main keels and secondary keels arranged in a crisscross pattern. The main keels extend in a direction away from the building wall, and the secondary keels are laid on top of the main keels. The base plate is placed on the secondary keels. A U-shaped bracket is detachably connected to the top of the template support frame, and the U-shaped bracket is supported on the main keel.

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