Construction methods for lifting equipment and multi-layer suspended structures

Abstract

This invention belongs to the field of structural construction technology and discloses a lifting device and a construction method for multi-layer suspended structures. The lifting device includes a sleeve, a fixing member, a connecting member, and a sand box. The sleeve has a cavity extending along a first direction. The fixing member is fixedly connected to the cavity, and the connecting member is slidably disposed within the cavity along the first direction. The connecting member is used to connect the lifting rope. The sand box is disposed within the cavity, between the fixing member and the connecting member. The sand box includes a piston head and a piston barrel. The piston head is slidably disposed within the piston barrel along the first direction. The piston barrel is connected to the connecting member, and the piston barrel has an openable and closable sand outlet hole, allowing the interior of the piston barrel to communicate with the outside through the sand outlet hole. The multi-layer suspended structure construction method uses the above-described lifting device. Through the above design, the lifting device of this application can release the residual tensile stress of the lifting rope before dismantling operations, facilitating the dismantling of the lifting rope and making the operation safer and more reliable.

Description

Technical Field

[0001] This invention relates to the field of structural construction technology, and in particular to a hoisting tool and a method for constructing multi-layer suspended structures. Background Technology

[0002] In the construction of suspended structures, the conventional method requires the installation of temporary supports on the ground. The suspended structure is then installed layer by layer on the platform erected on the temporary supports until the suspended column is connected to the top roof to form a normal force transmission system. The temporary supports are then unloaded. This method is no different from the conventional steel structure installation method, so the installation is simple. However, it requires additional temporary support measures, and the temporary supports are limited by the installation height. In order to meet the requirements of the slenderness ratio and stability of the temporary supports, the cost of the support structure used is relatively high, which brings certain difficulties to the installation of multi-story suspended structures.

[0003] Furthermore, directly using the overall lifting method for multi-layer suspended structures also presents certain technical challenges: After the multi-layer suspended structure is installed, the hydraulic lifting equipment cannot directly release the residual tension stress of the steel strands. For the core-through jack at the upper anchor point, if the residual stress of the steel strands is to be released by lowering them, the equipment needs to retract the cylinder upwards by 3cm. However, at this point, the steel strands are already fixed to the main structure, leaving no space for cylinder retraction. In addition, in conventional overall lifting processes, due to equipment limitations, the unloading process often involves workers directly cutting the steel strands. However, since the steel strands are still under tension and have residual tension stress, directly cutting them would cause them to bounce around, endangering the lives of the workers. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting device that can release the residual tension stress of the lifting rope before dismantling operations, making the dismantling of the lifting rope easier and the operation safer and more reliable.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A lifting device comprising:

[0007] The sleeve has an internal receiving cavity that extends along a first direction;

[0008] The fastener is fixedly connected to the accommodating cavity;

[0009] A connector is slidably disposed within the accommodating cavity along the first direction, and the connector is used to connect a hoisting rope.

[0010] A sand box is disposed within the accommodating cavity and located between the fixing member and the connecting member. The sand box includes a piston head and a piston barrel. The piston head is slidably disposed in the piston barrel along the first direction. The piston barrel is connected to the connecting member. The piston barrel has an openable and closable sand outlet hole, and the interior of the piston barrel can communicate with the outside through the sand outlet hole.

[0011] Optionally, the sand box further includes a limiting member disposed on the piston head, the limiting member being able to abut against the inner wall of the piston barrel to limit the sliding stroke of the piston head.

[0012] Optionally, the lifting device further includes a sliding plate, which is sandwiched between the connector and the inner wall of the receiving cavity.

[0013] Optionally, the sliding plate is made of tetrafluoroethylene.

[0014] Optionally, the fixing member has a first through hole, and the connecting member has a second through hole. The first through hole and the second through hole are concentrically arranged, and the hoisting rope can pass through the first through hole and the second through hole in sequence and be connected to the connecting member.

[0015] Optionally, the sand box is provided in multiple locations, and the axes of the multiple piston barrels are all parallel to the first direction.

[0016] Another objective of this invention is to provide a construction method for a multi-layer suspended structure, which solves the problem of high-altitude installation of multi-layer suspended structures, eliminates the need for additional ground support structures, solves the problem of limited support height, and releases the residual tension stress of the hoisting ropes before dismantling operations, facilitating the dismantling of the hoisting ropes and making the operation safer and more reliable.

[0017] To achieve this objective, the present invention adopts the following technical solution:

[0018] A construction method for a multi-story suspended structure, using the lifting equipment described above, includes the following steps:

[0019] S1. Assemble the roof structure on the ground, install the lifting device on the main structure, and connect the lifting rope of the lifting device to the roof structure through the lifting equipment.

[0020] S2. Lift the roof structure according to the height of the lower structure, and install the first layer of lower structure below the roof structure. For each preset height that the roof structure is lifted, install the next layer of lower structure below the previous layer of lower structure. Repeat this process until the roof structure is lifted to the preset elevation and the installation of each layer of lower structure is completed.

[0021] S3. After the roof structure reaches the preset elevation, a patch section is installed between the roof structure and the main structure.

[0022] S4. Open the sand outlet to drain the sand and gravel from the piston barrel and release the residual tension stress of the hoisting rope.

[0023] S5. Disassemble the lifting device.

[0024] Optionally, in step S1, one end of the hoisting rope is connected to the output end of the lifting device, and the other end passes through the first through hole and the second through hole in sequence, and is connected to the connector through the anchor, and the sleeve is welded to the roof structure.

[0025] Optionally, in step S3, a patch segment connection is made between the main structure and the lower structure.

[0026] Optionally, in step S5, after the residual tension stress of the hoisting rope has been released, the hoisting rope is cut manually.

[0027] Beneficial effects:

[0028] This invention provides a lifting device and a construction method for a multi-layer suspended structure. The lifting device includes a sleeve, a fixing member, a connecting member, and a sand box. The sleeve has a cavity extending along a first direction, facilitating the threading and connection of lifting ropes. The fixing member is fixedly connected within the cavity, providing stability for the connection of the lifting ropes. The connecting member is slidably disposed within the cavity along the first direction, connecting the lifting ropes so that the ropes can slide with the connecting member. The sand box is disposed within the cavity, between the fixing member and the connecting member. The sand box includes a piston head and a piston barrel. The piston head is slidably disposed within the piston barrel along the first direction, and the piston barrel is connected to the connecting member to form an integral structure. During use, the piston barrel is filled with sand and gravel. The piston barrel has an openable and closable sand outlet, allowing the interior of the piston barrel to communicate with the outside through the sand outlet, enabling the sand and gravel to leak out. When the lifting ropes are used to lift the relevant structure through the lifting device, the lifting ropes are taut, which in turn moves the connecting parts and piston barrel towards the fixed part. The piston head is confined to the fixed part, thus compacting the sand and gravel in the piston barrel. After the relevant structure is installed and needs to bear the load independently, the workers can open the sand outlet to discharge the sand and gravel. During the sand and gravel discharge process, the piston barrel will have room to slide, allowing the connecting parts and piston barrel to move towards the fixed part. The movement of the connecting parts will cause the lifting ropes to contract until the lifting ropes release the residual tension stress and remain in a relaxed state, preventing the workers from removing the lifting ropes before the stress is released and causing danger. Through the above settings, the lifting device of this application can release the residual tension stress of the lifting ropes before the dismantling operation, which facilitates the dismantling of the lifting ropes and makes the operation safer and more reliable.

[0029] This invention also provides a construction method for a multi-layer suspended structure. The hoisting ropes of the lifting device are connected to the roof structure via a lifting tool, enabling the roof structure to be lifted layer by layer. The roof structure is lifted according to the height of the lower suspension structure, and the first layer of the lower suspension structure is installed below the roof structure. Based on this, lower suspension structures are installed layer by layer to facilitate the subsequent installation of lower suspension structures. Each time the roof structure is lifted to a preset height, the next layer of lower suspension structure is installed below the previous layer, and this process is repeated until the roof structure reaches the preset elevation and the installation of each layer of lower suspension structure is completed. After the roof structure reaches the preset height, a patch section is installed between the roof structure and the main structure to improve the overall connection quality. By opening the sand outlet hole to drain the sand and gravel from the piston barrel, the residual tension stress in the hoisting ropes is released, facilitating the disassembly of the lifting device and making the operation safer and more reliable. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the lifting device provided in an embodiment of the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the lifting device provided in an embodiment of the present invention. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the construction of a multi-layer suspended structure provided in an embodiment of the present invention. Figure 1 ;

[0033] Figure 4 This is a schematic diagram of the construction of a multi-layer suspended structure provided in an embodiment of the present invention. Figure 2 ;

[0034] Figure 5 This is a schematic diagram of the construction of a multi-layer suspended structure provided in an embodiment of the present invention. Figure 3 ;

[0035] Figure 6 This is a schematic diagram of the construction of a multi-layer suspended structure provided in an embodiment of the present invention. Figure 4 ;

[0036] Figure 7 yes Figure 3 A magnified view of a portion of point A in the middle.

[0037] In the picture:

[0038] 1. Sleeve; 11. Receiving cavity;

[0039] 2. Fastener; 21. First through hole;

[0040] 3. Connector; 31. Second through hole;

[0041] 4. Sandbox; 41. Piston head; 42. Piston barrel; 43. Limiting component;

[0042] 5. Sliding plate;

[0043] 100. Lifting ropes; 200. Roof structure; 300. Lifting device; 400. Main structure; 500. Undercarriage structure. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0045] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0048] like Figure 1 and Figure 2As shown, this embodiment provides a lifting device, which includes a sleeve 1, a fixing member 2, a connecting member 3, and a sand box 4. The sleeve 1 has a receiving cavity 11 that extends along a first direction. The fixing member 2 is fixedly connected to the receiving cavity 11. The connecting member 3 is slidably disposed in the receiving cavity 11 along the first direction and is used to connect a lifting rope 100. The sand box 4 is disposed in the receiving cavity 11 and is located between the fixing member 2 and the connecting member 3. The sand box 4 includes a piston head 41 and a piston barrel 42. The piston head 41 is slidably disposed in the piston barrel 42 along the first direction. The piston barrel 42 is connected to the connecting member 3. The piston barrel 42 has an openable and closable sand outlet hole, and the interior of the piston barrel 42 can be connected to the outside through the sand outlet hole.

[0049] In this embodiment, the sleeve 1 has a cavity 11 extending along a first direction, facilitating the threading and connection of the lifting rope 100. The fixing member 2 is fixedly connected within the cavity 11, providing stability for the connection of the lifting rope 100. The connecting member 3 is slidably disposed within the cavity 11 along the first direction, connecting the lifting rope 100 so that the lifting rope 100 can slide along with the connecting member 3. A sand box 4 is disposed within the cavity 11, located between the fixing member 2 and the connecting member 3. The sand box 4 includes a piston head 41 and a piston barrel 42. The piston head 41 is slidably disposed within the piston barrel 42 along the first direction, and the piston barrel 42 is connected to the connecting member 3 to form an integral structure. When the lifting device is in use, the piston barrel 42 is filled with sand and gravel. The piston barrel 42 has an openable and closable sand outlet hole, allowing the interior of the piston barrel 42 to communicate with the outside through the sand outlet hole, enabling the sand and gravel to leak out. When the lifting rope 100 is used to lift the relevant structure through the lifting device, the lifting rope 100 is taut, which in turn moves the connecting piece 3 and the piston barrel 42 toward the fixing piece 2. The piston head 41 is confined to the fixing piece 2, thus compacting the sand and gravel in the piston barrel 42. When the relevant structure is installed and needs to bear the load independently, the operator can open the sand outlet hole to discharge the sand and gravel. During the sand and gravel discharge process, the piston barrel 42 will have sliding space, allowing the connecting piece 3 and the piston barrel 42 to move toward the fixing piece 2. The movement of the connecting piece 3 will cause the lifting rope 100 to contract until the lifting rope 100 releases the residual tension stress and remains in a relaxed state, preventing the operator from removing the lifting rope 100 before the stress is released and causing danger. Through the above settings, the lifting device of this embodiment can release the residual tension stress of the lifting rope 100 before the dismantling operation, which facilitates the dismantling of the lifting rope 100 and makes the operation safer and more reliable.

[0050] Specifically, such as Figure 1As shown, in this embodiment, the sand box 4 further includes a limiting member 43, which is disposed on the piston head 41. The limiting member 43 can abut against the inner wall of the piston barrel 42 to limit the sliding stroke of the piston head 41 and prevent the piston head 41 from separating from the piston barrel 42, thus affecting normal operation. In other embodiments, the limiting member 43 can also be disposed on the piston barrel 42, and achieve the function of limiting the sliding stroke of the piston head 41 by abutting against the piston head 41. No further limitations are made here.

[0051] Specifically, such as Figure 1 As shown, in order to facilitate the sliding of the connector 3 and the piston barrel 42 within the accommodating cavity 11 and reduce the sliding resistance, the lifting device also includes a sliding plate 5. The sliding plate 5 is sandwiched between the connector 3 and the inner wall of the accommodating cavity 11, making the connector 3 slide more smoothly.

[0052] More specifically, the sliding plate 5 is made of polytetrafluoroethylene (PTFE) to reduce the coefficient of sliding friction between the connector 3 and the inner wall of the accommodating cavity 11, thus facilitating the sliding of the connector 3. Furthermore, the sliding plate 5 can also be made of materials such as nylon or polycarbonate to reduce the coefficient of friction; however, no further limitations are specified here.

[0053] Specifically, such as Figure 1 As shown, the fixing member 2 has a first through hole 21, and the connecting member 3 has a second through hole 31. The first through hole 21 and the second through hole 31 are concentrically arranged to facilitate the smooth passage of the lifting rope 100. The lifting rope 100 can pass through the first through hole 21 and the second through hole 31 in sequence and be connected to the connecting member 3. The constraint effect of the first through hole 21 and the second through hole 31 on the lifting rope 100 ensures the stability of the lifting rope 100 during operation and prevents the lifting rope 100 from swaying. Furthermore, the first through hole 21 and the second through hole 31 are respectively opened at the center of the fixing member 2 and the connecting member 3, so that the lifting rope 100 does not have an eccentric problem when it is passed through and connected to the lifting device of this embodiment, ensuring safer lifting operations.

[0054] Specifically, such as Figure 1 and Figure 2 As shown, in order to better release the tension stress inside the hoisting rope 100 and facilitate the disassembly of the hoisting rope 100 by the operators, multiple sand boxes 4 are provided. Multiple sand boxes 4 are arranged side by side between the fixing part 2 and the connecting part 3. The axes of multiple piston barrels 42 are all parallel to the first direction, so as to ensure that during the process of the hoisting rope 100 driving the piston barrels 42 to move, the sliding direction of multiple piston barrels 42 relative to the piston head 41 is consistent, which can ensure that the stress release of the hoisting rope 100 is more uniform and the operation is safer.

[0055] like Figures 1-7As shown, this embodiment also provides a construction method for a multi-layer suspended structure. This method uses the lifting equipment of this embodiment and includes the following specific steps:

[0056] S1. Assemble the roof structure 200 on the ground, install the lifting device 300 on the main structure 400, and connect the lifting rope 100 of the lifting device 300 to the roof structure 200 through the lifting tool.

[0057] S2. Raise the roof structure 200 according to the height of the lower structure 500, and install the first layer of lower structure 500 under the roof structure 200. For each preset height that the roof structure 200 is raised, install the next layer of lower structure 500 under the previous layer of lower structure 500. Repeat this process until the roof structure 200 is raised to the preset elevation and the installation of each layer of lower structure 500 is completed.

[0058] S3. After the roof structure 200 reaches the preset elevation, a patch section is connected between the roof structure 200 and the main structure 400.

[0059] S4. Open the sand outlet to drain the sand and gravel inside the piston barrel 42 and release the residual tension stress of the hoisting rope 100.

[0060] S5. Disassemble the lifting device 300.

[0061] In this embodiment, the hoisting rope 100 of the lifting device 300 is connected to the roof structure 200 via a lifting device, thereby enabling the roof structure 200 to be lifted layer by layer. The roof structure 200 is lifted according to the height of the lower hanging structure 500, and the first layer of lower hanging structure 500 is installed below the roof structure 200. Based on this, lower hanging structures 500 are installed layer by layer to facilitate the subsequent layer-by-layer installation of lower hanging structures 500. Each time the roof structure 200 is lifted by a preset height, the next layer of lower hanging structure 500 is installed. Installed below the upper-level hanging structure 500, this process is repeated until the roof structure 200 is raised to the preset elevation, and the installation of each hanging structure 500 is completed. After the roof structure 200 reaches the preset height, a patch section is installed between the roof structure 200 and the main structure 400 to improve the connection quality of the overall structure. By opening the sand outlet hole to empty the sand and gravel in the piston barrel 42, the residual tension stress of the hoisting rope 100 is released, which facilitates the disassembly of the lifting device 300 and makes the operation safer and more reliable.

[0062] It should be noted that the lifting device 300 in this embodiment can be a jack, hydraulic lift, or other similar device to ensure the safety and stability of the lifting operation. The sand box 4 in this embodiment can be replaced by a hydraulic jack or similar structure, as long as it facilitates the sliding of the piston barrel 42 and connecting piece 3 relative to the piston head 41 to loosen the hoisting rope 100; no further limitations are imposed here. Furthermore, the lower hanging structure 500 in this embodiment includes beams, columns, and other structures, but is not limited to these types; the specific structure can be determined based on the actual operation. In this embodiment, as the roof structure 200 is lifted, positioned, and disassembled as a whole, workers install the lower hanging structure 500 layer by layer, thus solving the problem of high-altitude installation of multi-layered suspended structures. This not only simplifies the construction process but also eliminates the need for additional ground support structures, such as scaffolding and ground supports, and solves the problem of limited support height.

[0063] Specifically, such as Figure 3 and Figure 7 As shown, in step S1, one end of the hoisting rope 100 is connected to the output end of the lifting device 300, and the other end passes through the first through hole 21 and the second through hole 31 in sequence, and is connected to the connector 3 through the anchor. The sleeve 1 is welded to the roof structure 200. The lifting device 300 drives the hoisting rope 100 to move, thereby lifting the roof structure 200. The hoisting rope 100 passes through the first through hole 21 and the second through hole 31 in sequence, which plays a certain limiting and restraining role to prevent the hoisting rope 100 from swaying. Since the other end of the hoisting rope 100 is connected to the connector 3 through the anchor, the strength of the connection of the above components is improved. The anchor can fix and adjust the hoisting rope 100, reduce the wear of the hoisting rope 100 during the hoisting process, extend its service life, and at the same time, facilitate the operation and assembly of the operator. Since one end of the sleeve 1 is directly welded to the roof structure 200, the sleeve 1, the fastener 2 and the roof structure 200 become an integrated structure, which can ensure the safety of the roof structure 200 during the lifting process and ensure the strength of the connection of each component.

[0064] Specifically, in step S2, the initial lifting height of the roof structure 200 is determined based on the height of the first-layer lower structure 500. After the roof structure 200 is lifted to the corresponding height, the operator controls the lifting device 300 to temporarily brake the hoisting rope 100, ensuring that the roof structure 200 remains relatively stable at the corresponding height, making it easier for the operator to install the lower structure 500 using forklifts, elevators, and other devices.

[0065] Specifically, in step S3, in addition to the interlocking connection between the roof structure 200 and the main structure 400, an interlocking connection is also made between the main structure 400 and the lower structure 500. By adding this interlocking connection, the weight and stress between the main structure 400 and the lower structure 500 can be better distributed, providing a more stable connection and support, thereby reducing swaying or deformation. Furthermore, it allows the main structure 400 and the lower structure 500 to form a unified whole, enhancing the overall structural performance and better resisting external loads and vibrations. Compared to other connection methods, the interlocking connection has a relatively low cost, reducing manufacturing costs. Simultaneously, it reduces stress concentration, preventing structural damage or safety accidents caused by stress concentration, further ensuring operational safety. Furthermore, operators can add interlocking connections between corresponding components based on actual operational conditions to improve the overall structural stability and strength.

[0066] Specifically, in step S4, as the gravel is discharged through the sand outlet, the piston barrel 42 and the connecting piece 3 have space to slide toward the fixing piece 2, causing the hoisting rope 100, which was originally in a tensioned state, to gradually relax and release the tension stress. In addition, the travel between the piston head 41 and the piston barrel 42 can be calculated based on the construction simulation analysis to determine the deflection of the main structure 400 after the roof structure 200 and the lower structure 500 are installed and the corresponding lifting device 300 is disassembled, so as to ensure that the sand box 4 has a contraction travel greater than the deflection, thereby effectively releasing residual stress and making the operation safer.

[0067] Specifically, in step S5, after the residual tension stress of the hoisting rope 100 has been released, the hoisting rope 100 is manually cut to disassemble it, thus preventing injury to workers or accidents caused by the residual tension stress. Furthermore, in this embodiment, the hoisting rope 100 is a steel strand, wire rope, or other specific structure. This type of hoisting rope 100 has high strength and good flexibility, ensuring safety during hoisting operations.

[0068] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A lifting device, characterized in that, include: The sleeve (1) has an internal receiving cavity (11) that extends along the first direction. The fastener (2) is fixedly connected to the accommodating cavity (11); The connector (3) is slidably disposed in the accommodating cavity (11) along the first direction, and the connector (3) is used to connect the hoisting rope (100). A sand box (4) is disposed in the accommodating cavity (11) and located between the fixing member (2) and the connecting member (3). The sand box (4) includes a piston head (41) and a piston barrel (42). The piston head (41) is slidably disposed in the piston barrel (42) along the first direction. The piston barrel (42) is connected to the connecting member (3). The piston barrel (42) is provided with an openable and closable sand outlet hole. The interior of the piston barrel (42) can be connected to the outside through the sand outlet hole. The fixing member (2) has a first through hole (21), and the connecting member (3) has a second through hole (31). The first through hole (21) and the second through hole (31) are concentrically arranged. The hoisting rope (100) can pass through the first through hole (21) and the second through hole (31) in sequence and be connected to the connecting member (3).

2. The lifting device according to claim 1, characterized in that, The sand box (4) also includes a limiting member (43), which is disposed on the piston head (41). The limiting member (43) can abut against the inner wall of the piston barrel (42) to limit the sliding stroke of the piston head (41).

3. The lifting device according to claim 1, characterized in that, The lifting device also includes a sliding plate (5), which is sandwiched between the connector (3) and the inner wall of the accommodating cavity (11).

4. The lifting device according to claim 3, characterized in that, The sliding plate (5) is made of tetrafluoroethylene.

5. The lifting device according to claim 1, characterized in that, The sand box (4) is provided in multiple ways, and the axes of the multiple piston barrels (42) are all parallel to the first direction.

6. A construction method for multi-layer suspended structures, characterized in that, Using the lifting device according to any one of claims 1-5, the following steps are included: S1. Assemble the roof structure (200) on the ground, install the lifting device (300) on the main structure (400), and connect the lifting rope (100) of the lifting device (300) to the roof structure (200) through the lifting tool; S2. Raise the roof structure (200) according to the height of the lower structure (500), and install the first layer of lower structure (500) under the roof structure (200). For each preset height raised by the roof structure (200), install the next layer of lower structure (500) under the previous layer of lower structure (500). Repeat this process until the roof structure (200) is raised to the preset elevation and the installation of each layer of lower structure (500) is completed. S3. After the roof structure (200) reaches the preset elevation, a patch section is connected between the roof structure (200) and the main structure (400); S4. Open the sand outlet to drain the sand and gravel in the piston barrel (42) and release the residual tension stress of the hoisting rope (100); S5. Disassemble the lifting device (300).

7. The construction method for a multi-layer suspended structure according to claim 6, characterized in that, In step S1, one end of the hoisting rope (100) is connected to the output end of the lifting device (300), and the other end passes through the first through hole (21) and the second through hole (31) in sequence, and is connected to the connector (3) through the anchor. The sleeve (1) is welded to the roof structure (200).

8. The construction method for a multi-layer suspended structure according to claim 6, characterized in that, In step S3, a filler segment connection is made between the main structure (400) and the lower structure (500).

9. The construction method for a multi-layer suspended structure according to claim 6, characterized in that, In step S5, after the residual tension stress of the hoisting rope (100) is released, the hoisting rope (100) is cut manually.

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