Steel platform formwork system with switchable stroke modes

Abstract

The invention relates to the technical field of steel platform formworks, in particular to a stroke mode switchable steel platform formwork system which comprises a steel platform. The force bearing cross beams are connected with the steel platform, and the extending sections of the force bearing cross beams are connected with climbing hydraulic cylinders; the installation formwork is located below the steel platform, and the installation formwork is connected with the steel platform; the jacking movable frame ascends and descends in a vertical mode, a plurality of jacking hydraulic cylinders are connected to the jacking movable frame, piston rods of the jacking hydraulic cylinders are connected with the mounting formwork, and a plurality of telescopic brackets are connected to the mounting formwork and the jacking movable frame; the device has the advantages that the device can be switched between the climbing mode and the jacking mode according to the actual requirements of core tube construction, and then the matched formwork system lifting mode can be rapidly selected according to the working condition of site construction.

Description

Technical Field

[0001] The present application relates to the technical field of steel platform formwork systems, and particularly to a steel platform formwork system with a switchable stroke mode. Background Art

[0002] Driven by factors such as space utilization, urban planning, economic development, technological progress, and cultural expression, super high-rise buildings have developed rapidly. In order to increase the seismic resistance and stability of super high-rise buildings, and at the same time optimize the space utilization efficiency of buildings so that the main functional spaces can occupy better lighting positions and line-of-sight conditions, it is necessary to construct a super high-rise core tube in the central part of super high-rise buildings.

[0003] The prior art discloses an integrated system of rigid protection and gantry crane inside the core tube of a super high-rise building, which includes embedded parts and embedded part supports, and also includes a protection platform. Telescopic legs that can expand and contract in the left-right direction are arranged on the left and right sides of the protection platform, and the protection platform is supported on the embedded part supports through the telescopic legs; a telescopic column is fixed below the protection platform, and two guiding legs are fixed below the telescopic column. The two guiding legs are symmetrically arranged left and right with respect to the telescopic column, and can support on the embedded part supports when the guiding legs extend to the left or right; it also includes a gantry crane device, and the gantry crane device includes a guide rail extending in the left-right direction and a hoisting assembly moving relative to the guide rail. The guide rail is fixed on the lower surface of the protection platform. When the guiding legs support on the embedded part supports, the telescopic column extends to realize the rise of the protection platform; when the legs of the protection platform support on the embedded part supports, the telescopic column contracts to realize the rise of the guiding legs. Regarding the above related technologies, the elevators in super high-rise floors are generally partitioned, such as being divided into low-zone, middle-zone, and high-zone elevators, etc. The shapes and sizes of elevator shafts in different height areas may be different. Therefore, during the construction of super high-rise core tubes, a single lifting method of the formwork system may not meet the requirements of different working conditions at the actual construction site. Summary of the Invention

[0004] In order to quickly select a matching lifting method of the formwork system according to the working conditions of on-site construction, the present application provides a steel platform formwork system with a switchable stroke mode.

[0005] The steel platform formwork system with a switchable stroke mode provided by the present application adopts the following technical solutions: A steel platform formwork system with a switchable stroke mode, comprising a steel platform, and the steel platform (1) includes multiple steel plates; multiple load-bearing cross beams, the load-bearing cross beams are connected to the steel platform, and a climbing hydraulic cylinder is connected to the extended section of the load-bearing cross beams; Install a formwork support, where the formwork support is located below the steel platform and is connected to the steel platform; A jacking movable frame that moves up and down vertically. A plurality of jacking hydraulic cylinders are connected to the jacking movable frame. The piston rod of the jacking hydraulic cylinder is connected to the formwork support. A plurality of telescopic corbels are connected to both the formwork support and the jacking movable frame.

[0006] By adopting the above technical solutions, according to factors such as the current height area and the shape and size of the core tube, a suitable lifting method is selected. For example, when jacking is applicable at the current stage, the telescopic corbel connected to the jacking movable frame withdraws the support column from the support hole reserved on the wall of the core tube. Then, the piston rod of the jacking hydraulic cylinder is retracted by driving the hydraulic system. The piston rod of the jacking hydraulic cylinder drives the jacking movable frame to rise until the jacking movable frame rises in place. The telescopic corbel connected to the jacking movable frame pushes out the support column and extends it into the support hole reserved on the wall of the core tube. At this time, the telescopic corbel connected to the formwork support withdraws the support column from the support hole reserved on the wall of the core tube. Then, the piston rod of the jacking hydraulic cylinder is extended again by driving the hydraulic system, causing the formwork support to rise. When the formwork support rises, it drives the steel platform and the telescopic corbel connected to the formwork support to rise until the formwork support rises in place, causing the telescopic corbel connected to the formwork support to push out the support column and extend it into the support hole reserved on the wall of the core tube, completing one jacking action. If climbing is applicable at the current stage, first, the telescopic corbel withdraws the support column from the support hole reserved on the wall of the core tube. Then, the climbing hydraulic cylinder is driven by the hydraulic system to act. While the climbing hydraulic cylinder climbs upward along the axis of the climbing steel column, it drives the steel platform to rise through the load-bearing crossbeam. When the steel platform rises, it drives the formwork support to rise until the formwork support climbs in place. Moreover, the minimum climbing distance can be greater than the spacing of the support holes on the wall of a core tube, less than the spacing of the support holes on the wall of a core tube, or equal to the spacing of the support holes on the wall of a core tube. The designed steel platform formwork support system with a switchable stroke mode can form an operating space for construction workers to stand on through the steel platform and can be used as a stacking area for construction materials. Through the cooperation of the load-bearing crossbeam and the climbing hydraulic cylinder, climbing along the axis of the climbing steel column can be achieved, thereby realizing the overall climbing of the steel platform and the formwork support. Through the formwork support, a construction space for installing the core tube casting formwork can be provided for construction workers, and the structural stability of the steel platform can be improved. Through the cooperation of the jacking movable frame, the jacking hydraulic cylinder, and the telescopic corbel, the overall jacking of the steel platform and the formwork support can be achieved. Moreover, it is also possible to switch between two ascending modes of climbing and jacking according to the actual requirements of core tube construction, and the lifting method of the matching formwork support system can be quickly selected according to the on-site construction conditions.

[0007] In a specific feasible implementation, the formwork support includes A formwork body, wherein the formwork body is connected to the steel platform, the formwork body is connected to the load-bearing crossbeam, and the formwork body is connected to the telescopic corbel; A lifting and fixing frame is connected to the mold frame body, the lifting and fixing frame is connected to the piston rod of the lifting hydraulic cylinder, and the lifting and fixing frame is located above the lifting movable frame.

[0008] By adopting the above technical solution, an installation formwork is designed, and the structural stability of the steel platform can be improved through the formwork main body, and the position stability of the load-bearing beam can be further strengthened. The formwork main body can be structurally strengthened through the jacking fixed frame, and can be used as a force point for the jacking hydraulic cylinder. The minimum hole spacing between the two support holes on the wall of the core tube can also be changed by changing the height position control of the jacking fixed frame and the jacking movable frame.

[0009] In a specific feasible implementation scheme, the load-bearing beam includes two bending-resistant I-beams, the bending-resistant I-beams are connected to the steel platform, and an adjustment gap is left between the two bending-resistant I-beams for the climbing steel column to pass through, and the climbing hydraulic cylinder is connected to the bending-resistant I-beams.

[0010] By adopting the above technical solution, the designed load-bearing beam can reduce the material cost and the overall weight of the equipment while ensuring the bending strength through two bending-resistant I-beams, and can make the climbing hydraulic cylinder move along the long side direction of the bending-resistant I-beam, so as to adapt to the climbing steel columns on the wall of core tubes of different sizes.

[0011] In a specific possible implementation manner, a plurality of reinforcing connection blocks are connected between two of the anti-bending I-beams, and the plurality of reinforcing connection blocks are distributed along the long side direction of the anti-bending I-beams and divide the adjustment gap into a plurality of intervals.

[0012] By adopting the above technical solution, the designed reinforced connecting block can improve the connection stability and overall structural strength of the two bending-resistant I-beams.

[0013] In a specific possible implementation scheme, the end of the load-bearing beam away from the steel platform is connected to a construction scaffold, and a cavity for constructing the wall of the core tube is reserved between the construction scaffold and the installation formwork.

[0014] By adopting the above technical solution, the designed construction scaffolding can facilitate construction workers to install or disassemble the outer forming template of the core tube wall.

[0015] In a specific possible implementation manner, a plurality of mounting frames are slidably connected to the mounting mold frame, a sliding limiting wheel is connected to the mounting frame, and an adjusting rod is rotatably connected to the mounting frame, and the adjusting rod is threadedly connected to the mounting mold frame.

[0016] By adopting the above technical solution, the designed mounting bracket, sliding limit wheel and adjusting rod can achieve sliding contact between the mounting formwork and the inner wall of the core tube during the lifting process, thereby controlling the stability of the mounting formwork during the lifting process.

[0017] In a specific feasible implementation, a fall prevention net is arranged below the mounting formwork, and the fall prevention net is connected to one end of the mounting bracket close to the sliding limit wheel.

[0018] By adopting the above technical solution, the designed fall prevention net connected to the mounting bracket can effectively change according to the size of the inner wall of the core tube.

[0019] In a specific feasible implementation, the telescopic corbel connected to the mounting formwork is arranged away from the steel platform.

[0020] By adopting the above technical solution, the designed telescopic corbel connected to the mounting formwork and arranged away from the steel platform can, during the stay construction period of the steel platform and the mounting formwork, load the gravity onto the wall of the core tube below as much as possible, improving the reliability of the telescopic corbel support.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The designed steel platform formwork system with switchable travel modes can form an operation space for construction workers to stand on through the steel platform and can be used as a stacking area for construction materials. Through the cooperation of the load-bearing cross beam and the climbing hydraulic cylinder, climbing along the axial direction of the climbing steel column can be achieved, thereby realizing the overall climbing of the steel platform and the mounting formwork. Through the mounting formwork, a construction space for installing the core tube casting formwork can be provided for construction workers, and the structural stability of the steel platform can be improved. Through the cooperation of the jacking movable frame, the jacking hydraulic cylinder and the telescopic corbel, the overall jacking of the steel platform and the mounting formwork can be achieved. Moreover, it can be switched between two ascending modes of climbing and jacking according to the actual needs of core tube construction, and the lifting mode of the formwork system that matches the construction conditions on site can be quickly selected.

[0022] 2. The designed steel platform formwork system with switchable travel modes can improve the structural stability of the steel platform through the formwork main body and can further strengthen the position stability of the load-bearing cross beam. Through the jacking fixed frame, the structure of the formwork main body can be strengthened, and it can serve as the force-bearing point of the jacking hydraulic cylinder. Also, by controlling the height position change between the jacking fixed frame and the jacking movable frame, the minimum hole distance between two support holes on the wall of the core tube can be changed.

[0023] 3. The steel platform formwork system with a switchable travel mode can reduce the material cost and the overall self-weight of the equipment on the premise of ensuring the bending strength through two bending-resistant I-beams, and can move the climbing hydraulic cylinder along the long side direction of the bending-resistant I-beam to adapt to the climbing steel columns on the cylinder walls of core tubes of different sizes. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the steel platform formwork system with a switchable travel mode according to an embodiment of the present application.

[0025] Figure 2 is Figure 1 An enlarged schematic view of part A in

[0026] Figure 3 is in Figure 1 A cross-sectional view in the application state after adding a construction scaffolding on the basis of

[0027] Figure 4 is Figure 1 The application state schematic diagram of

[0028] Figure 5 is Figure 3 A partial structural schematic diagram after adding a jacking unit in

[0029] Figure 6 is in Figure 4 A structural schematic diagram after adding a guiding unit on the basis of

[0030] Figure 7 is Figure 6 An enlarged schematic view of part B in

[0031] Figure 8 is in Figure 5 A cross-sectional view in the application state after adding a falling prevention net on the basis of

[0032] Description of the reference signs: 01, core tube; 02, climbing steel column; 1, steel platform; 2, load-bearing cross beam; 21, bending-resistant I-beam; 22, strengthening connection block; 3, climbing hydraulic cylinder; 4, installation formwork; 41, formwork main body; 42, jacking fixing frame; 43, falling prevention net; 5, jacking movable frame; 6, jacking hydraulic cylinder; 7, telescopic corbel; 8, construction scaffolding; 9, guiding unit; 91, installation frame; 92, sliding limit wheel; 93, adjusting rod. Detailed Description of the Embodiment

[0033] The following further elaborates on the present application in conjunction with the attached Figures 1-8 drawings.

[0034] An embodiment of the present application discloses a steel platform formwork system with a switchable travel mode.

[0035] Referring toFigure 1 A steel platform formwork system with switchable travel modes includes a steel platform 1 and an installation formwork 4, the steel platform 1 is located above the installation formwork 4, and the steel platform 1 is welded or bolted to the installation formwork 4, a guardrail is welded and fixed on the steel platform 1, and a baffle is connected to the side of the guardrail close to the steel platform 1, and the baffle is used to prevent objects rolling on the steel platform 1 from falling from the side of the guardrail.

[0036] Reference Figure 1 In order to facilitate the lifting and lowering of the steel platform 1 and the installation formwork 4, the steel platform formwork system with switchable stroke modes also includes a load-bearing beam 2 and a climbing hydraulic cylinder 3. The number of the load-bearing beams 2 is multiple, and the number of the climbing hydraulic cylinders 3 is multiple and corresponds to the number of the load-bearing beams 2. The load-bearing beams 2 are welded and fixed to the bottom wall of the steel platform 1, and the multiple load-bearing beams 2 are evenly distributed around the circumference of the center point of the steel platform 1. In this application, the steel platform is formed by laying out multiple steel plates; the climbing hydraulic cylinder 3 is connected to the extended section of the load-bearing beam 2 beyond the steel platform 1, and the climbing hydraulic cylinder 3 is held on the climbing steel column 02. When the lifting and lowering of the steel platform 1 and the installation formwork 4 need to be realized, the external hydraulic system drives the climbing hydraulic cylinder 3 to move synchronously, and then lifts and lowers along the axial direction of the climbing steel column 02.

[0037] Reference Figure 1 and Figure 2 Specifically, the load-bearing crossbeam 2 includes two anti-bending I-beams 21, which are welded and fixed to the bottom wall of the steel platform 1, and an adjustment gap is left between the two anti-bending I-beams 21 for the climbing steel column 02 to pass through, and the bottom wall of the cylinder body of the climbing hydraulic cylinder 3 is in contact with the anti-bending I-beam 21; the two anti-bending I-beams 21 can reduce the material cost and the overall dead weight of the equipment while ensuring the anti-bending strength, and the climbing hydraulic cylinder 3 can be moved along the long side direction of the anti-bending I-beam 21, so as to adapt to the climbing steel columns 02 on the wall of the core tube 01 of different sizes.

[0038] Reference Figure 2 In order to further improve the connection stability and overall structural strength of the two bending-resistant I-beams 21, a plurality of reinforcing connecting blocks 22 are welded and fixed between the two bending-resistant I-beams 21. The plurality of reinforcing connecting blocks 22 are distributed along the long side direction of the bending-resistant I-beams 21, and the plurality of reinforcing connecting blocks 22 divide the adjustment gap into a plurality of intervals.

[0039] Reference Figure 3 In order to facilitate the construction of the outer side of the super high-rise core tube 01 forming template, the end of the bending-resistant I-beam 21 away from the steel platform 1 is bolted to a construction scaffold 8, and a cavity for constructing the tube wall of the super high-rise core tube 01 is left between the construction scaffold 8 and the installation formwork 4.

[0040] Reference Figure 4 and Figure 5, Further, in order to be able to switch between the climbing and jacking upward modes according to the actual requirements of the construction of the core tube 01, and then be able to quickly select a matching lifting method for the formwork system according to the construction conditions on site, the steel platform formwork system with a switchable stroke mode further includes a jacking movable frame 5, a jacking hydraulic cylinder 6, and a telescopic corbel 7. The jacking movable frame 5 is slidably connected to the installation formwork 4, and the sliding direction of the jacking movable frame 5 is vertically arranged. The number of both the jacking hydraulic cylinder 6 and the telescopic corbel 7 is multiple. The cylinder body of the jacking hydraulic cylinder 6 is bolted to the jacking movable frame 5, and one end of the piston rod of the jacking hydraulic cylinder 6 is connected to the installation formwork 4. The axial direction of the piston rod of the jacking hydraulic cylinder 6 is vertically arranged. The multiple telescopic corbels 7 are divided into a fixed group and a movable group. The telescopic corbels 7 of the fixed group are installed on the installation formwork 4, and the telescopic corbels 7 of the movable group are installed on the jacking movable frame 5. A plurality of support holes are opened in the wall of the super high-rise core tube 01 along the height direction. After the telescopic corbel 7 is extended and retracted, it can be inserted into the support hole, thereby realizing the support for the installation formwork 4.

[0041] Refer to Figure 4 and Figure 5 , The installation formwork 4 includes a formwork main body 41 and a jacking fixing frame 42. The formwork main body 41 is welded and fixed to the steel platform 1, and the formwork main body 41 is located below the steel platform 1. The formwork main body 41 is also welded and fixed to the bending-resistant I-beam 21. The steel platform 1 and the formwork main body 41 are respectively arranged on the upper and lower sides of the bending-resistant I-beam 21 to strengthen the connection structure stability of the bending-resistant I-beam 21. The formwork main body 41 is connected to the telescopic corbels 7 of the fixed group.

[0042] Refer to Figure 2 , The jacking fixing frame 42 is welded and fixed to the formwork main body 41, and the jacking fixing frame 42 is connected to the piston rod of the jacking hydraulic cylinder 6. The jacking fixing frame 42 is located above the jacking movable frame 5. Through the formwork main body 41, the structural stability of the steel platform 1 can be improved, and the position stability of the bearing cross beam 2 can be further strengthened. Through the jacking fixing frame 42, the structure of the formwork main body 41 can be strengthened, and it can be used as the stress point of the jacking hydraulic cylinder 6. Also, by controlling the height position between the jacking fixing frame 42 and the jacking movable frame 5, the minimum hole distance between two support holes on the wall of the core tube 01 can be changed.

[0043] Refer to Figure 5 and Figure 6 , The telescopic corbels 7 of the fixed group are arranged at the end of the installation formwork 4 away from the steel platform 1. By arranging the telescopic corbels 7 away from the steel platform 1, during the construction period when the steel platform 1 and the installation formwork 4 stay, the gravity can be loaded onto the wall of the super high-rise core tube 01 that has been completely solidified below as much as possible, improving the reliability of the support of the telescopic corbels 7.

[0044] Refer to Figure 6 andFigure 7 In order to achieve the sliding contact between the installation formwork 4 and the inner wall of the core tube 01 during the lifting process, and further control the stability of the installation formwork 4 during the lifting process, the steel platform formwork system with a switchable stroke mode further includes a plurality of guiding units 9. The guiding unit 9 includes an installation frame 91, a sliding limiting wheel 92 and an adjusting rod 93. The installation frame 91 is slidably connected to the formwork main body 41, and the sliding direction of the installation frame 91 is horizontally arranged. The sliding limiting wheel 92 is bolted to the installation frame 91, and the sliding limiting wheel 92 can be in rolling connection with the wall of the super high-rise core tube 01. The adjusting rod 93 is rotatably connected to the installation frame 91 and is threadedly connected to the formwork main body 41. By screwing the adjusting rod 93, the sliding limiting wheel 92 can be brought into abutment with the wall of the super high-rise core tube 01.

[0045] Refer to Figure 8 Furthermore, a fall prevention net 43 is arranged below the formwork main body 41. The fall prevention net 43 is tied and fixed to one end of the installation frame 91 close to the sliding limiting wheel 92, and the projection of the formwork main body 41 falls into the fall prevention net 43. The fall prevention net 43 connected to the installation frame 91 can effectively change according to the size of the inner wall of the core tube 01, so as to intercept high falling objects, and further reduce the possibility that the objects accidentally dropped by the construction personnel during operation directly fall to the ground and cause injury.

[0046] The implementation principle of a steel platform formwork system with a switchable travel mode in an embodiment of the present application is as follows: According to factors such as the current height area and the shape and size of the core tube 01, a suitable lifting method is selected. For example, when jacking is applicable at the current stage, the telescopic corbel 7 connected to the jacking movable frame 5 withdraws the support column from the support hole reserved on the wall of the core tube 01. Then, the piston rod of the jacking hydraulic cylinder 6 is retracted by driving the hydraulic system. The piston rod of the jacking hydraulic cylinder 6 drives the jacking movable frame 5 to rise until the jacking movable frame 5 rises in place. The telescopic corbel 7 connected to the jacking movable frame 5 pushes out the support column and extends it into the support hole reserved on the wall of the core tube 01. At this time, the telescopic corbel 7 connected to the installation formwork 4 withdraws the support column from the support hole reserved on the wall of the core tube 01. Then, the piston rod of the jacking hydraulic cylinder 6 is extended again by driving the hydraulic system, so that the installation formwork 4 rises. When the installation formwork 4 rises, it drives the steel platform 1 and the telescopic corbel 7 connected to the installation formwork 4 to rise until the installation formwork 4 rises in place, so that the telescopic corbel 7 connected to the installation formwork 4 pushes out the support column and extends it into the support hole reserved on the wall of the core tube 01, completing one jacking action. If climbing is applicable at the current stage, first, the telescopic corbel 7 withdraws the support column from the support hole reserved on the wall of the core tube 01. Then, the climbing hydraulic cylinder 3 is driven to act by the hydraulic system. While the climbing hydraulic cylinder 3 climbs upward along the axis of the climbing steel column 02, it drives the steel platform 1 to rise through the load-bearing cross beam 2. When the steel platform 1 rises, it drives the installation formwork 4 to rise until the installation formwork 4 climbs in place. Moreover, the minimum climbing distance can be greater than the spacing of the support holes on the wall of one core tube 01, can be less than the spacing of the support holes on the wall of one core tube 01, or can be equal to the spacing of the support holes on the wall of one core tube 01. An operation space for construction workers to stand can be formed through the steel platform 1, and it can also be used as a stacking area for construction materials. The cooperation of the load-bearing cross beam 2 and the climbing hydraulic cylinder 3 can realize climbing along the axis of the climbing steel column 02, thereby realizing the overall climbing of the steel platform 1 and the installation formwork 4. The installation formwork 4 can provide a construction space for construction workers to install the formwork for pouring the core tube 01, and can also improve the structural stability of the steel platform 1. The cooperation of the jacking movable frame 5, the jacking hydraulic cylinder 6, and the telescopic corbel 7 can realize the overall jacking of the steel platform 1 and the installation formwork 4. Moreover, it is also possible to switch between two rising modes of climbing and jacking according to the actual requirements of the core tube 01 construction, and it is possible to quickly select a matching formwork system lifting method according to the construction conditions on site.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A steel platform formwork system with switchable travel modes, characterized in that: include A steel platform (1), wherein the steel platform (1) comprises a plurality of steel plates; A plurality of load-bearing crossbeams (2), wherein the load-bearing crossbeams (2) are connected to the steel platform (1), and a climbing hydraulic cylinder (3) is connected to the extended section of the load-bearing crossbeam (2); An installation formwork (4), wherein the installation formwork (4) is located below the steel platform (1), and the installation formwork (4) is connected to the steel platform (1); A lifting movable frame (5) that can be lifted and lowered in a vertical manner, wherein the lifting movable frame (5) is connected to a plurality of lifting hydraulic cylinders (6), piston rods of the lifting hydraulic cylinders (6) are connected to the mounting mold frame (4), and a plurality of telescopic brackets (7) are connected to both the mounting mold frame (4) and the lifting movable frame (5); The load-bearing crossbeam (2) comprises two bending-resistant I-beams (21), the bending-resistant I-beams (21) are connected to the steel platform (1), and an adjustment gap is left between the two bending-resistant I-beams (21) for the climbing steel column (02) to pass through, and the climbing hydraulic cylinder (3) is connected to the bending-resistant I-beams (21); A plurality of reinforcing connection blocks (22) are connected between the two bending-resistant I-beams (21), and the plurality of reinforcing connection blocks (22) are distributed along the long side direction of the bending-resistant I-beams (21) and divide the adjustment gap into a plurality of intervals.

2. The steel platform formwork system with switchable travel modes according to claim 1 is characterized in that: The mounting mold frame (4) comprises A formwork body (41), wherein the formwork body (41) is connected to the steel platform (1), the formwork body (41) is connected to the load-bearing crossbeam (2), and the formwork body (41) is connected to the telescopic bracket (7); A lifting fixed frame (42), the lifting fixed frame (42) is connected to the mold frame body (41), the lifting fixed frame (42) is connected to the piston rod of the lifting hydraulic cylinder (6), and the lifting fixed frame (42) is located above the lifting movable frame (5).

3. The steel platform formwork system with switchable travel modes according to claim 1 is characterized in that: The end of the load-bearing crossbeam (2) away from the steel platform (1) is connected to a construction scaffold (8), and a cavity for constructing the wall of the core tube (01) is left between the construction scaffold (8) and the installation formwork (4).

4. The steel platform formwork system with switchable travel modes according to claim 1 is characterized in that: A plurality of mounting frames (91) are slidably connected to the mounting mold frame (4), a sliding limiting wheel (92) is connected to the mounting frame (91), and an adjusting rod (93) is rotatably connected to the mounting frame (91), and the adjusting rod (93) is threadedly connected to the mounting mold frame (4).

5. The steel platform formwork system with switchable travel modes according to claim 4 is characterized in that: An anti-falling net (43) is provided below the installation mold frame (4), and the anti-falling net (43) is connected to one end of the installation frame (91) close to the sliding limiting wheel (92).

6. The steel platform formwork system with switchable travel modes according to claim 1 is characterized in that: The telescopic bracket (7) connected to the installation formwork (4) is arranged away from the steel platform (1).

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