A post-cast belt prestressed top-return support system and support method

Abstract

The present invention discloses a post-cast strip prestressed return-to-top support system and a support method, belonging to the technical field of floor support. A post-cast strip prestressed return-to-top support system includes a prefabricated floor and a base, and also includes: a prefabricated metal connector, fixedly installed at the bottom of the prefabricated floor; a prefabricated telescopic support assembly, fixedly installed on the base, and the top is fixedly installed with the prefabricated metal connector; a telescopic control assembly, fixedly installed on the base, used to drive the prefabricated telescopic support assembly to extend and retract; the present invention adopts a prefabricated and modular design, and the connection between the components is simple, which is convenient for disassembly and reinstallation. Compared with prefabricated metal beams and other structural supports that require a large number of bolts to fix, the new system is faster and closer to disassemble. The lifting and lowering of the floor is achieved through hydraulic drive, without a large amount of manual operation, which improves the efficiency of disassembly and return-to-top. At the same time, the precise control of the hydraulic system also ensures the stability and safety during the return-to-top process.

Description

Technical Field

[0001] The invention relates to the technical field of floor slab support, in particular to a post-cast strip prestressed top-return support system. Background Art

[0002] Steel structures are often needed for support in post-cast basement projects. Steel structures are made of steel materials and are one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates, and uses silanization, pure manganese phosphating, water washing and drying, galvanizing and other rust removal and rust prevention processes. Welds, bolts or rivets are usually used to connect the components or parts. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rise buildings and other fields. Steel structures are prone to rust. Generally, steel structures need to be rusted, galvanized or painted, and maintained regularly.

[0003] The supporting steel structure in the existing basement post-cast joint project is not easy to move after assembly, and generally requires a large number of steel pipes and bolts during disassembly and assembly. It is cumbersome to build and requires high-altitude work, which is highly dangerous. Therefore, in order to improve the construction efficiency of the supporting steel structure and improve the safety of workers, a post-cast joint prestressed return top support system is proposed. Summary of the invention

[0004] The present invention is to solve the problems in the prior art that the support system has low assembly and disassembly efficiency and is inconvenient to move, and proposes a post-casting belt prestressed top-return support system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A post-cast strip prestressed return top support system includes a prefabricated floor and a base, and also includes: a prefabricated metal connector fixedly installed at the bottom of the prefabricated floor; a prefabricated telescopic support assembly fixedly installed on the base, and the top is fixedly installed with the prefabricated metal connector; a telescopic control assembly fixedly installed on the base and used to drive the prefabricated telescopic support assembly to telescope; an extended support assembly arranged on the base, and when the prefabricated telescopic support assembly drives the prefabricated floor to rise, the extended support assembly is unfolded.

[0007] As a preferred embodiment of the present invention: the prefabricated telescopic support assembly includes a fixed support steel pipe, a connecting pipe is fixedly installed on the top of the base, the fixed support steel pipe is threadedly connected to the connecting pipe, a lifting support steel pipe is slidably connected to the fixed support steel pipe, the lifting support steel pipe extends into the fixed support steel pipe and a first piston plate is fixedly installed therein, a connecting plate is fixedly installed on the top of the lifting support steel pipe, and the connecting plate is fixedly installed to the prefabricated metal connecting piece.

[0008] As a preferred embodiment of the present invention: the prefabricated telescopic support assembly is provided with four groups, and also includes a first limiting steel frame and a second limiting steel frame, the first limiting steel frame is fixedly installed with the four fixed support steel pipes, and the second limiting steel frame is fixedly installed with the four lifting support steel pipes.

[0009] As a preferred embodiment of the present invention: a hollow steel column is slidably installed in the fixed support steel pipe, the hollow steel column is coaxial with the lifting support steel pipe, and the hollow steel column is slidably connected to the lifting support steel pipe.

[0010] As a preferred embodiment of the present invention: the bottom of the hollow steel column extends to the bottom of the base and a connecting plate is fixedly installed thereon, the bottom of the base is fixedly installed with a sealing plate, the sealing plate is slidably connected to the hollow steel column, a universal wheel is fixedly installed at the bottom of the connecting plate, a spring is sleeved on the hollow steel column, and both ends of the spring are respectively in contact with the sealing plate and the connecting plate.

[0011] As a preferred embodiment of the present invention: the extended support assembly includes a rotating shaft, a mounting slot is opened on the base, the rotating shaft is rotatably installed in the mounting slot, a leg is fixedly installed on the rotating shaft, a sleeve is fixedly installed on the leg, a connecting seat is fixedly connected to the side wall of the connecting plate, a sliding rod is rotatably installed on the connecting seat, and the sliding rod is slidably connected to the sleeve.

[0012] As a preferred embodiment of the present invention: a second piston cylinder is fixedly installed on the base, a third piston plate is slidably installed in the second piston cylinder, a connecting rod is fixedly installed on the bottom of the third piston plate, and the bottom of the connecting rod is fixedly connected to the connecting plate; a third oil pipe is fixedly installed on the output end of the second piston cylinder, a combination valve is arranged on the third oil pipe, an oil inlet pipe is fixedly installed on the side wall of the fixed support steel pipe, the oil inlet pipe is connected with the inner side of the connecting pipe, and an oil inlet hole connected with the oil inlet pipe is opened on the side wall of the fixed support steel pipe.

[0013] As a preferred embodiment of the present invention: the telescopic control assembly comprises: an oil barrel storing hydraulic oil, a mounting plate fixedly installed on the top of the oil barrel, a driven shaft rotatably installed on the mounting plate, a driving shaft rotatably installed on the top of the oil barrel, a hexagonal joint fixedly installed on the top of the driving shaft, and the driving shaft and the driven shaft rotate synchronously through a bevel gear set; a first piston cylinder fixedly connected to the top of the oil barrel, a one-way valve is provided at both the output end and the input end of the first piston cylinder, a second piston plate is slidably installed in the first piston cylinder, a crank is rotatably installed on the top of the second piston plate, an eccentric wheel is fixedly installed on the driven shaft, the crank is rotatably connected to the eccentric wheel, the input end of the first piston cylinder is fixedly connected to the second oil pipe in the oil barrel of the extension device, the output end of the first piston cylinder is fixedly connected to the first oil pipe, and the first oil pipe is fixedly installed to the input end of the second piston cylinder; a fourth oil pipe is fixedly installed on the oil inlet pipe, the output end of the fourth oil pipe is connected to the oil inlet end of the oil barrel, and an electromagnetic control valve is fixedly installed on the fourth oil pipe.

[0014] As a preferred embodiment of the present invention: a mounting frame is fixedly mounted on the top of the oil drum, a motor is fixedly mounted on the mounting frame, and an output end of the motor is fixedly mounted to the hexagonal joint.

[0015] A supporting method comprises the following steps:

[0016] Step 1: Fix the prefabricated floor slab to the prefabricated telescopic support assembly through prefabricated metal connectors;

[0017] Step 2: Start the motor to drive the telescopic control assembly to supply hydraulic oil into the second piston cylinder to drive the hollow steel column to rise, and send the hydraulic oil into the fixed support steel pipe to drive the lifting support steel pipe to rise, thereby driving the floor slab to rise to the braking height;

[0018] Step 3: The hollow steel column rises to drive the extended support assembly to unfold and contact the ground;

[0019] Step 4: After the prefabricated floor reaches the predetermined position and stabilizes, turn off the motor and all valves to ensure that the support system is in a locked state;

[0020] Step 5: pouring concrete on the precast slab;

[0021] Step 6: When the concrete is completely solidified, the precast floor slab is driven to slowly descend to its original position through the telescopic control assembly. Finally, all parts are removed and cleaned and stored.

[0022] Compared with the prior art, the present invention provides a post-casting belt prestressed top-return support system, which has the following beneficial effects:

[0023] 1. The post-cast belt prestressed top-return support system adopts a prefabricated and modular design. The connection between the components is simple and easy to disassemble and reinstall. Compared with prefabricated metal beams and other structural supports that require a large number of bolts to fix, the new system is faster and closer to disassemble. The floor slab is raised and lowered by hydraulic drive, without a lot of manual operation, which improves the efficiency of disassembly and top-return. At the same time, the precise control of the hydraulic system also ensures the stability and safety of the top-return process;

[0024] 2. The post-cast prestressed top-return support system, prefabricated floor slabs and prefabricated telescopic support components can be directly installed in place without on-site processing and assembly, which greatly shortens the installation time. Compared with prefabricated metal beams and other structural supports that require on-site cutting, welding and assembly, the new system significantly improves construction efficiency, and the hydraulic drive system can achieve precise height adjustment to ensure that the floor slab reaches the height and levelness required by the design. Compared with the manual adjustment of prefabricated metal beams and other structural supports, the new system has higher adjustment accuracy. In addition, the prefabricated floor slabs, prefabricated telescopic support components and prefabricated metal connectors can be installed on the ground, without the need for high-altitude operations, which improves the safety of the support system during installation;

[0025] 3. The post-cast prestressed top support system reduces the use of prefabricated metal beams and other structures and bolts, and reduces material costs. At the same time, due to the modular design, the workload of on-site processing and assembly is reduced, further reducing construction costs. Compared with the complex construction process of prefabricated metal beams and other structural supports, the new system is easier to construct and does not require professional welders and cutters, which reduces the technical requirements for construction personnel and reduces safety hazards during construction.

[0026] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The present invention controls the rise of the floor through the hydraulic system, while driving the hollow steel column to rise, thereby improving the stability between the fixed support steel pipe and the lifting support steel pipe. The rise of the hollow steel column can make the universal wheel rise off the ground, further improving the stability of the support. In addition, when the universal wheel rises, the extended support assembly is unfolded to contact the ground to increase the support area, further improving the stability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional structural schematic diagram of a post-casting belt prestressed top-return support system proposed by the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of a post-casting belt prestressed top-return support system proposed by the present invention;

[0029] Figure 3 This is a structural schematic diagram of a base of a post-cast belt prestressed top-return support system proposed by the present invention;

[0030] Figure 4 A cross-sectional view of a fixed support steel pipe of a post-cast belt prestressed top-return support system proposed by the present invention;

[0031] Figure 5 A post-cast belt prestressed top support system proposed by the present invention Figure 4 The structural diagram of part A in the figure;

[0032] Figure 6 A cross-sectional view of a rising support of a post-cast belt prestressed top-return support system proposed by the present invention;

[0033] Figure 7 A post-cast belt prestressed top support system proposed by the present invention Figure 6 The structural diagram of part B;

[0034] Figure 8 A cross-sectional view of a second piston cylinder of a post-casting belt prestressed return top support system proposed by the present invention;

[0035] Fig. 9 A post-cast belt prestressed top support system proposed by the present invention Figure 8 Schematic diagram of the structure of part C.

[0036] In the figure: 1. base; 2. connecting pipe; 3. fixed support steel pipe; 4. lifting support steel pipe; 5. connecting plate; 6. first limit steel frame; 7. second limit steel frame; 8. prefabricated metal connector; 9. prefabricated floor; 10. first piston plate; 11. hollow steel column; 12. sealing plate; 13. connecting plate; 14. universal wheel; 15. spring; 16. rotating shaft; 17. supporting leg; 18. sleeve; 19. sliding rod; 20. connecting seat; 21. oil drum; 22. mounting plate; 23. active shaft; 24, hexagonal joint; 25, driven shaft; 26, eccentric wheel; 27, bevel gear set; 28, first piston cylinder; 29, second piston plate; 30, crank; 31, first oil pipe; 32, second oil pipe; 33, second piston cylinder; 34, third piston plate; 35, connecting rod; 36, third oil pipe; 37, combination valve; 38, oil inlet pipe; 39, oil inlet hole; 40, fourth oil pipe; 41, electromagnetic control valve; 42, mounting bracket; 43, motor; 44, mounting notch. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Example: Refer to Figure 1-Figure 9 A post-cast prestressed top-return support system includes a prefabricated floor 9 and a base 1, and also includes: a prefabricated metal connector 8, fixedly installed at the bottom of the prefabricated floor 9; a prefabricated telescopic support assembly, fixedly installed on the base 1, and the top is fixedly installed with the prefabricated metal connector 8; a telescopic control assembly, fixedly installed on the base 1, used to drive the prefabricated telescopic support assembly to extend and retract; an extended support assembly, arranged on the base 1, when the prefabricated telescopic support assembly drives the prefabricated floor 9 to rise, the extended support assembly is expanded.

[0040] In this embodiment, a corresponding model of prefabricated floor slab 9 and a prefabricated metal connector 8 matching the model of the prefabricated floor slab 9 are selected according to the construction requirements, and a prefabricated telescopic support assembly with a corresponding height range (such as 2M-3.8M; 1.5M-.8M; 3M-5.8M, etc.) is selected according to the height to be constructed, and then the prefabricated telescopic support assembly is connected to the prefabricated metal connector 8, and the prefabricated telescopic support assembly is fixedly installed on the base 1, and then when the prefabricated telescopic support assembly is in a retracted state, the prefabricated metal connector 8 is fixedly installed on the prefabricated telescopic support assembly, and the prefabricated floor slab 9 is fixedly installed on the prefabricated metal connector 8, and then the prefabricated telescopic support assembly is driven to extend, and the prefabricated floor slab 9 is delivered to the specified height.

[0041] In summary, by adopting a prefabricated and modular design, the connections between the various components are simple, making them easy to disassemble and reinstall. Compared with prefabricated metal beams and other structural supports that require a large number of bolts to fix them, the new system can be disassembled more quickly and closely. The floor slabs can be raised and lowered through hydraulic drive, without the need for a large amount of manual operation, which improves the efficiency of disassembly and re-topping.

[0042] Reference Figure 1-Figure 7 The prefabricated telescopic support assembly includes a fixed support steel pipe 3, a connecting pipe 2 is fixedly installed on the top of the base 1, the fixed support steel pipe 3 is threadedly connected to the connecting pipe 2, a lifting support steel pipe 4 is slidably connected to the fixed support steel pipe 3, the lifting support steel pipe 4 extends to the fixed support steel pipe 3 and a first piston plate 10 is fixedly installed therein, a connecting plate 5 is fixedly installed on the top of the lifting support steel pipe 4, and the connecting plate 5 is fixedly installed with the prefabricated metal connecting piece 8.

[0043] After the fixed support steel pipe 3 is filled with hydraulic oil, as the amount of hydraulic oil inside the fixed support steel pipe 3 increases, the hydraulic oil drives the lifting support steel pipe 4 to rise through the first piston plate 10, thereby driving the prefabricated metal connector 8 and the prefabricated floor slab 9 to rise to a specified height.

[0044] When the top support is returned, the pressure in the fixed support steel pipe can be increased, and the stress test of the supported concrete layer can be carried out in cooperation with the concrete detection device.

[0045] Reference Figure 1 and Figure 2 There are four groups of prefabricated telescopic support components, including a first limiting steel frame 6 and a second limiting steel frame 7. The first limiting steel frame 6 is fixedly installed with four fixed support steel pipes 3, and the second limiting steel frame 7 is fixedly installed with four lifting support steel pipes 4.

[0046] The four fixed support steel pipes 3 and the four lifting support steel pipes 4 are fixed and restrained by the first limiting steel frame 6 and the second limiting steel frame 7, thereby preventing the fixed support steel pipes 3 and the lifting support steel pipes 4 from bending and deformation.

[0047] Furthermore, two groups of first limiting steel frames 6 are provided, one of which is arranged at the top of the fixed supporting steel pipe 3, and a distance measuring sensor is fixedly installed at the bottom of the second limiting steel frame 7. The distance between the first limiting steel frame 6 and the second limiting steel frame 7 is detected by the distance measuring sensor, and then the data can be transmitted to the mobile terminal, so as to facilitate the staff to determine the height of the prefabricated floor slabs 9 in each part.

[0048] Reference Figure 4 , Figure 6 and Figure 7 A hollow steel column 11 is slidably installed in the fixed support steel pipe 3, the hollow steel column 11 is coaxial with the lifting support steel pipe 4, and the hollow steel column 11 is slidably connected to the lifting support steel pipe 4.

[0049] In this embodiment, the hollow steel column 11 can not only occupy a large amount of space in the fixed support steel pipe 3, but also reduce the hydraulic oil required to drive the lifting support steel pipe 4 to rise. Moreover, since the hollow steel column 11 is coaxial with the lifting support steel pipe 4 and is slidably connected, the hollow steel column 11 can provide additional support during the lifting process to prevent the lifting support steel pipe 4 from deviating from the axis or bending unnecessarily.

[0050] Reference Figure 4-Figure 7 The bottom of the hollow steel column 11 extends to the bottom of the base 1 and is fixedly installed with a connecting plate 13. The bottom of the base 1 is fixedly installed with a sealing plate 12. The sealing plate 12 is slidably connected to the hollow steel column 11. A universal wheel 14 is fixedly installed at the bottom of the connecting plate 13. A spring 15 is sleeved on the hollow steel column 11. The two ends of the spring 15 are respectively in contact with the sealing plate 12 and the connecting plate 13.

[0051] In this embodiment, the universal wheel 14 contacts the ground under the action of the spring 15, and makes the base 1 leave the ground, thereby facilitating the movement of the support system. When it moves to the specified position, it drives the hollow steel column 11 to slide upward, thereby improving the stability between the fixed support steel pipe 3 and the lifting support steel pipe 4. At the same time, the rise of the hollow steel column 11 can drive the universal wheel 14 to rise, thereby making the universal wheel 14 leave the ground and making the bottom of the base 1 fall to the ground, thereby increasing the contact area with the ground and improving the stability during support.

[0052] Reference Figure 1 and Figure 7 The extended support assembly includes a rotating shaft 16, a mounting slot 44 is opened on the base 1, the rotating shaft 16 is rotatably installed in the mounting slot 44, a support leg 17 is fixedly installed on the rotating shaft 16, a sleeve 18 is fixedly installed on the support leg 17, a connecting seat 20 is fixedly connected to the side wall of the connecting plate 13, a sliding rod 19 is rotatably installed on the connecting seat 20, and the sliding rod 19 is slidably connected to the sleeve 18.

[0053] When the universal wheel 14 rises, the connecting plate 13 drives the connecting seat 20 to rise. During this process, the slide rod 19 slides in the sleeve 18 and changes the inclination angle of the sleeve 18. At the same time, the sleeve 18 drives the support leg 17 to rotate axially around the rotating shaft 16, so that the support leg 17 is unfolded and in contact with the ground, thereby increasing the support range and further improving the stability of the support system.

[0054] Reference Figure 1-Figure 9A second piston cylinder 33 is fixedly installed on the base 1, and a third piston plate 34 is slidably installed in the second piston cylinder 33. A connecting rod 35 is fixedly installed on the bottom of the third piston plate 34, and the bottom of the connecting rod 35 is fixedly connected to the connecting plate 13; a third oil pipe 36 is fixedly installed on the output end of the second piston cylinder 33, and a combination valve 37 is provided on the third oil pipe 36. An oil inlet pipe 38 is fixedly installed on the side wall of the fixed support steel pipe 3, and the oil inlet pipe 38 is communicated with the inner side of the connecting pipe 2. An oil inlet hole 39 connected to the oil inlet pipe 38 is opened on the side wall of the fixed support steel pipe 3; the telescopic control component includes: an oil barrel 21 storing hydraulic oil, a mounting plate 22 is fixedly installed on the top of the oil barrel 21, a driven shaft 25 is rotatably installed on the mounting plate 22, a driving shaft 23 is rotatably installed on the top of the oil barrel 21, and a hexagonal joint 24 is fixedly installed on the top of the driving shaft 23, The driving shaft 23 and the driven shaft 25 rotate synchronously through the bevel gear set 27; the first piston cylinder 28 is fixedly connected to the top of the oil barrel 21, and the output end and input end of the first piston cylinder 28 are both provided with a one-way valve, and the second piston plate 29 is slidably installed in the first piston cylinder 28, and the crank 30 is rotatably installed on the top of the second piston plate 29, and the eccentric wheel 26 is fixedly installed on the driven shaft 25, and the crank 30 is rotatably connected to the eccentric wheel 26, and the input end of the first piston cylinder 28 is fixedly connected to the second oil pipe 32 in the extension device oil barrel 21, and the output end of the first piston cylinder 28 is fixedly connected to the first oil pipe 31, and the first oil pipe 31 is fixedly installed to the input end of the second piston cylinder 33; the fourth oil pipe 40 is fixedly installed on the oil inlet pipe 38, and the output end of the fourth oil pipe 40 is connected to the oil inlet end of the oil barrel 21, and the fourth oil pipe 40 is fixedly installed with an electromagnetic control valve 41.

[0055] In this embodiment, the hexagonal joint 24 is driven to rotate, the hexagonal joint 24 drives the driving shaft 23 to rotate, the driving shaft 23 drives the driven shaft 25 to rotate through the bevel gear set 27 (wherein the bevel gear set 27 includes a driving bevel gear fixedly mounted on the driving shaft 23 and driven bevel gears respectively fixedly mounted on four driven shafts 25, and the four sets of driven bevel gears are all meshed with the driving bevel gear), the driven shaft 25 drives the eccentric wheel 26 to rotate, and the eccentric wheel 26 drives the second piston plate 29 to reciprocate inside the first piston cylinder 28 through the crank 30. Lifting and lowering, and under the action of the one-way valve, the hydraulic oil in the oil barrel 21 is sucked through the second oil pipe 32, and then sent into the second piston cylinder 33 through the first oil pipe 31. At this time, the pressure in the second piston cylinder 33 is controlled by the combination valve 37 (the combination valve 37 includes a pressure control valve and a one-way valve), so that the pressure in the second piston cylinder 33 increases. When the pressure in the second piston cylinder 33 increases, the hydraulic oil drives the third piston plate 34 to rise, thereby driving the connecting plate 13 to rise, and then driving the hollow steel column 11 and the universal wheel 14 to rise;

[0056] When the third piston plate 34 rises to the limit, the hydraulic oil breaks through the pressure control valve and enters the oil inlet pipe 38. At this time, the electromagnetic control valve 41 is closed, and the hydraulic oil in the oil inlet pipe 38 enters the interior of the fixed support steel pipe 3, thereby driving the first piston plate 10 to rise, thereby driving the lifting support steel pipe 4 to rise, and then driving the prefabricated floor 9 to rise to the specified height.

[0057] When the support is completed, the electromagnetic control valve 41 and the pressure control valve can be opened. Then, under the gravity of the prefabricated floor 9, the prefabricated metal connector 8, the lifting support steel pipe 4 and the force of the spring 15 to reset and rebound, the hydraulic oil flows back to the oil barrel 21 through the fourth oil pipe 40 for storage. At the same time, the spring 15 drives the universal wheel 14 to descend, propping up the base 1, thereby facilitating the movement of the prefabricated floor 9 and the prefabricated metal connector 8.

[0058] Reference Figure 3 A mounting frame 42 is fixedly mounted on the top of the oil barrel 21 , a motor 43 is fixedly mounted on the mounting frame 42 , and an output end of the motor 43 is fixedly mounted to the hexagonal joint 24 .

[0059] When multiple groups of lifting support steel pipes 4 need to rise or fall synchronously, multiple groups of motors 43 can be controlled to start synchronously through a wireless control device, thereby synchronously driving multiple groups of prefabricated floor slabs 9 to rise to a specified height.

[0060] In addition, in order to save costs, the motor 43 does not need to be installed, and an electric hoist can be used to connect the hexagonal joint 24, and then the hexagonal joint 24 can be driven to rotate by the electric hoist.

[0061] To sum up, first of all, the system adopts a prefabricated and modular design, with simple connections between components, which is easy to disassemble and reinstall. Compared with prefabricated metal beams and other structural supports that require a large number of bolts to fix, the new system can be disassembled more quickly and closely. The lifting and lowering of the floor slab is achieved through hydraulic drive, without the need for a large amount of manual operation, which improves the efficiency of disassembly and top-up. At the same time, the precise control of the hydraulic system also ensures stability and safety during the top-up process.

[0062] Secondly, the prefabricated floor 9 and the prefabricated telescopic support components can be directly installed in place without the need for on-site processing and assembly, which greatly shortens the installation time. Compared with prefabricated metal beams and other structural supports that require on-site cutting, welding and assembly, the new system significantly improves construction efficiency, and the hydraulic drive system can achieve precise height adjustment to ensure that the floor reaches the height and levelness required by the design. Compared with the manual adjustment of prefabricated metal beams and other structural supports, the new system has higher adjustment accuracy. In addition, the prefabricated floor 9 and the prefabricated telescopic support components and the prefabricated metal connectors 8 can be installed on the ground without the need for high-altitude operations, thereby improving the safety of the support system during installation.

[0063] Furthermore, the new system reduces the use of prefabricated metal beams and other structures and bolts, reducing material costs. At the same time, due to the modular design, the workload of on-site processing and assembly is reduced, further reducing construction costs. Compared with the complex construction process of prefabricated metal beams and other structural supports, the new system is easier to construct and does not require professional welders and cutters, which reduces the technical requirements for construction personnel and reduces safety hazards during construction.

[0064] In addition, extended support components such as the rotating shaft 16, the supporting legs 17 and the sleeve 18 are added to the support system, which are automatically unfolded when the floor rises, thereby increasing the support area and stability. Compared with the single support method of the prefabricated metal beam and other structural supports, the new system has better support effect and stability.

[0065] A supporting method comprises the following steps:

[0066] Step 1: Fix the prefabricated floor slab 9 to the prefabricated telescopic support assembly through the prefabricated metal connector 8;

[0067] Step 2: Start the motor 43 to drive the telescopic control assembly to supply hydraulic oil into the second piston cylinder 33, drive the hollow steel column 11 to rise, and send the hydraulic oil into the fixed support steel pipe 3 to drive the lifting support steel pipe 4 to rise, thereby driving the floor slab to rise to the braking height;

[0068] Step 3: The hollow steel column 11 rises to drive the extended support assembly to unfold and contact the ground;

[0069] Step 4: After the prefabricated floor 9 reaches the predetermined position and stabilizes, the motor 43 and all valves are turned off to ensure that the support system is in a locked state;

[0070] Step 5: pouring concrete on the prefabricated floor slab 9;

[0071] Step 6: When the concrete is completely solidified, the prefabricated floor slab 9 is driven to slowly descend to the original position through the telescopic control assembly, and finally all parts are removed and cleaned and stored.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A post-cast strip prestressed top-return support system, comprising a prefabricated floor slab (9) and a base (1), characterized in that: Also includes: A prefabricated metal connector (8) fixedly mounted on the bottom of the prefabricated floor slab (9); A prefabricated telescopic support assembly, fixedly mounted on the base (1), and having a top fixedly mounted to the prefabricated metal connector (8); A telescopic control assembly, fixedly mounted on the base (1), and used to drive the prefabricated telescopic support assembly to telescope; An extended support assembly is arranged on the base (1), and when the prefabricated telescopic support assembly drives the prefabricated floor slab (9) to rise, the extended support assembly is unfolded; The prefabricated telescopic support assembly comprises a fixed support steel pipe (3), a connecting pipe (2) is fixedly installed on the top of the base (1), the fixed support steel pipe (3) is threadedly connected to the connecting pipe (2), a lifting support steel pipe (4) is slidably connected to the fixed support steel pipe (3), a first piston plate (10) is fixedly installed on the lifting support steel pipe (4) extending into the fixed support steel pipe (3), and a connecting plate (5) is fixedly installed on the top of the lifting support steel pipe (4), and the connecting plate (5) is fixedly installed with the prefabricated metal connecting piece (8); A hollow steel column (11) is slidably installed in the fixed support steel pipe (3), the hollow steel column (11) is coaxial with the lifting support steel pipe (4), and the hollow steel column (11) is slidably connected to the lifting support steel pipe (4); The bottom of the hollow steel column (11) extends to the bottom of the base (1) and is fixedly mounted with a connecting plate (13); the bottom of the base (1) is fixedly mounted with a sealing plate (12); the sealing plate (12) is slidably connected to the hollow steel column (11); a universal wheel (14) is fixedly mounted on the bottom of the connecting plate (13); a spring (15) is sleeved on the hollow steel column (11); two ends of the spring (15) are respectively in contact with the sealing plate (12) and the connecting plate (13); The extended support assembly comprises a rotating shaft (16), a mounting slot (44) is provided on the base (1), the rotating shaft (16) is rotatably mounted in the mounting slot (44), a support leg (17) is fixedly mounted on the rotating shaft (16), a sleeve (18) is fixedly mounted on the support leg (17), a connecting seat (20) is fixedly connected to the side wall of the connecting plate (13), a sliding rod (19) is rotatably mounted on the connecting seat (20), and the sliding rod (19) is slidably connected to the sleeve (18); A second piston cylinder (33) is fixedly mounted on the base (1), a third piston plate (34) is slidably mounted in the second piston cylinder (33), a connecting rod (35) is fixedly mounted on the bottom of the third piston plate (34), and the bottom of the connecting rod (35) is fixedly connected to the connecting plate (13); A third oil pipe (36) is fixedly mounted on the output end of the second piston cylinder (33), and a combined valve (37) is provided on the third oil pipe (36). An oil inlet pipe (38) is fixedly mounted on the side wall of the fixed support steel pipe (3), and the oil inlet pipe (38) is connected to the inner side of the connecting pipe (2). An oil inlet hole (39) connected to the oil inlet pipe (38) is provided on the side wall of the fixed support steel pipe (3); The telescopic control component comprises: An oil barrel (21) storing hydraulic oil, a mounting plate (22) fixedly mounted on the top of the oil barrel (21), a driven shaft (25) rotatably mounted on the mounting plate (22), a driving shaft (23) rotatably mounted on the top of the oil barrel (21), a hexagonal joint (24) fixedly mounted on the top of the driving shaft (23), the driving shaft (23) and the driven shaft (25) rotating synchronously via a bevel gear set (27); A first piston cylinder (28) fixedly connected to the top of the oil barrel (21), the output end and the input end of the first piston cylinder (28) are both provided with a one-way valve, a second piston plate (29) is slidably mounted in the first piston cylinder (28), a crank (30) is rotatably mounted on the top of the second piston plate (29), an eccentric wheel (26) is fixedly mounted on the driven shaft (25), the crank (30) is rotatably connected to the eccentric wheel (26), the input end of the first piston cylinder (28) is fixedly connected to a second oil pipe (32) in the extension device oil barrel (21), the output end of the first piston cylinder (28) is fixedly connected to a first oil pipe (31), and the first oil pipe (31) is fixedly mounted to the input end of the second piston cylinder (33); A fourth oil pipe (40) is fixedly mounted on the oil inlet pipe (38); the output end of the fourth oil pipe (40) is connected to the oil inlet end of the oil barrel (21); and an electromagnetic control valve (41) is fixedly mounted on the fourth oil pipe (40).

2. A post-cast strip prestressed top-return support system according to claim 1, characterized in that: The prefabricated telescopic support assembly is provided in four groups, and further comprises a first limiting steel frame (6) and a second limiting steel frame (7), wherein the first limiting steel frame (6) is fixedly mounted on the four fixed support steel pipes (3), and the second limiting steel frame (7) is fixedly mounted on the four lifting support steel pipes (4).

3. The post-cast strip prestressed top-return support system according to claim 1 is characterized in that: A mounting frame (42) is fixedly mounted on the top of the oil barrel (21), a motor (43) is fixedly mounted on the mounting frame (42), and an output end of the motor (43) is fixedly mounted on the hexagonal joint (24).

4. A supporting method, comprising a post-casting strip prestressed top-return supporting system as claimed in claim 3, characterized in that: The following steps are involved: Step 1: Fixing the prefabricated floor slab (9) to the prefabricated telescopic support assembly via the prefabricated metal connector (8); Step 2: starting the motor (43) to drive the telescopic control assembly to supply hydraulic oil into the second piston cylinder (33), driving the hollow steel column (11) to rise, and sending the hydraulic oil into the fixed support steel pipe (3) to drive the lifting support steel pipe (4) to rise, thereby driving the floor slab to rise to the braking height; Step 3: The hollow steel column (11) rises to drive the extended support assembly to unfold and contact the ground; Step 4: After the prefabricated floor slab (9) reaches the predetermined position and stabilizes, the motor (43) and all valves are turned off to ensure that the support system is in a locked state; Step 5: pouring concrete on the prefabricated floor slab (9); Step 6: When the concrete is completely solidified, the prefabricated floor slab (9) is driven to slowly descend to its original position through the telescopic control assembly, and finally all parts are removed and cleaned and stored.

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