Climbing formwork system for hollow thin-walled pier construction

Abstract

The application relates to a climbing formwork system for hollow thin-wall pier construction, which comprises an inner climbing formwork arranged on the inner surface of a side wall of the hollow thin-wall pier, an outer climbing formwork arranged on the outer surface of the side wall, and a plurality of connecting parts arranged along the width direction of the side wall and connecting the upper parts of the inner climbing formwork and the outer climbing formwork, wherein the inner climbing formwork comprises a formwork system, a frame system, a buried part system and a hydraulic system, the formwork system comprises a plurality of spliced boards corresponding to the connecting parts one by one, the spliced boards are hung below the corresponding connecting parts through pull ropes, the plurality of spliced boards are spliced to form an inner formwork matched with the side wall, and an operation platform is arranged on the frame system; and the connecting parts connect the upper parts of the frame system and the outer climbing formwork. Due to the adoption of the above technical scheme, the climbing formwork system for hollow thin-wall pier construction can greatly reduce the use frequency of the tower crane, improve the construction efficiency and reduce the risk of high-altitude operation.

Description

Technical Field

[0001] This invention relates to the field of climbing formwork technology, and more specifically to a climbing formwork system for the construction of hollow thin-walled piers. Background Technology

[0002] Due to their unique characteristics, hollow thin-walled piers require formwork on both the inner and outer surfaces of their sidewalls for concrete pouring. For taller hollow thin-walled piers, there are currently no efficient solutions for hoisting the internal formwork and constructing the internal operating platform. Currently, the common practice in hollow thin-walled pier construction is to install a climbing formwork system on the outside of the pier, using the system's built-in operating platform for fixing the outer formwork and pouring concrete. The inner formwork is typically hoisted using a tower crane. The internal operating platform requires erecting a scaffold starting from the bottom of the pier's interior, then installing the platform on top. During construction, as the pier rises by one segment, a new scaffold needs to be erected above the existing one to ensure the height of the internal operating platform matches the overall construction height of the hollow thin-walled pier. Therefore, in the existing construction methods for hollow thin-walled piers, tower cranes are frequently used to lift the inner formwork of the hollow thin-walled piers and transport the materials needed for erecting the scaffolding. This not only results in low construction efficiency, but also increases the risk of working at height due to the frequent use of tower cranes. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a climbing formwork system for the construction of hollow thin-walled piers, so as to solve the technical problem that in the existing construction methods for hollow thin-walled piers, tower cranes are frequently used to lift the inner formwork of the hollow thin-walled piers and transport the materials needed for the erection of the scaffold, which not only results in low construction efficiency, but also increases the risk of high-altitude operations due to the frequent use of tower cranes.

[0004] This invention is achieved through the following technical solution:

[0005] A climbing formwork system for constructing hollow thin-walled piers includes an inner climbing formwork on the inner surface of one side wall of the hollow thin-walled pier, an outer climbing formwork on the outer surface of the side wall, and multiple connecting parts that connect the upper part of the inner climbing formwork and the upper part of the outer climbing formwork and are spaced apart along the width direction of the side wall. The inner climbing formwork includes a template system, a frame system, an embedded part system, and a hydraulic system. The template system includes multiple panels that correspond one-to-one with the multiple connecting parts. The panels are suspended below the corresponding connecting parts by ropes. After the multiple panels are assembled, they form an inner template that fits the side wall. The frame system is equipped with an operating platform. The connecting parts connect the upper part of the frame system and the upper part of the outer climbing formwork.

[0006] Furthermore, the connecting part includes a first rod with one end connected to the upper part of the frame system and the other end facing the outer climbing formwork, a sliding part disposed on the first rod in a manner that can slide along the axis of the first rod, and a second rod with one end connected to the sliding part and the other end connected to the upper part of the outer climbing formwork; the panel is suspended on the corresponding first rod by the pull rope.

[0007] Furthermore, one end of the first rod is connected to the upper part of the frame system via a first ball joint, and the other end of the second rod is connected to the upper part of the external climbing formwork via a second ball joint.

[0008] Furthermore, the sliding part includes a sliding column and a channel disposed within the sliding column and having one end connected to the end face of the sliding column facing the frame system; the first rod is slidably fitted within the channel, and the second rod is fixedly connected to the end of the sliding column facing the outer climbing formwork.

[0009] Furthermore, the connecting part also includes a limiting part for fixing the relative position of the first rod and the sliding column.

[0010] Furthermore, the channel includes a first segment disposed within the sliding column and connected at one end to the end face of the sliding column facing the frame system, and a second segment disposed within the sliding column and connected to the other end of the first segment. The diameter of the second segment is larger than the diameter of the first segment, and the first rod is slidably fitted within the first segment. The limiting part includes a piston slidably fitted within the second segment and dividing the second segment into a first cavity and a second cavity, a water-holding cylinder disposed above the sliding column with an open upper end and a closed lower end, a first water pipe with one end connected to the bottom of the water-holding cylinder and the other end connected to the end of the first cavity facing away from the second cavity, a second water pipe with one end connected to the bottom of the water-holding cylinder and the other end connected to the end of the second cavity facing away from the first cavity, a first valve disposed on the first water pipe, and a second valve disposed on the second water pipe. The other end of the first rod passes through the first segment and the first cavity in sequence and is then fixedly connected to the piston.

[0011] Furthermore, both the first water pipe and the second water pipe are flexible hoses; the limiting part also includes a fixing frame fixed to the upper side of the sliding column, a suspension rope fixed to the upper end of the fixing frame, and a connecting rod fixed to the lower end of the suspension rope; the connecting rod is fixedly connected to the upper end of the water container, and the lower end of the suspension rope is located at the center of the upper end of the water container.

[0012] Furthermore, the connecting part also includes a connecting ring disposed around the first rod body, the connecting ring being slidably fitted onto the first rod body, the upper end of the pull rope being fixedly connected to the connecting ring, and the lower end being fixedly connected to the corresponding splicing plate.

[0013] The beneficial effects of this invention include:

[0014] When using the climbing formwork system for hollow thin-walled pier construction described in this invention to construct hollow thin-walled piers, tower cranes are not required to lift the inner formwork of the hollow thin-walled pier. After the inner and outer climbing formwork are erected, tower cranes are not required to lift the materials for the scaffolding. This can significantly reduce the frequency of tower crane use, improve construction efficiency, and reduce the risks of working at heights.

[0015] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the climbing formwork system for the construction of hollow thin-walled piers according to the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of 'a' in the middle;

[0018] Figure 3 This is a cross-sectional view of the combined structure of the first rod, second rod, sliding column, piston, and sealing ring in the climbing formwork system for the construction of hollow thin-walled piers.

[0019] The meanings of the numbers in the attached diagram are as follows:

[0020] First frame system -1; First embedded part system -2; First hydraulic system -3; Panel assembly -4; Pull rope -5; First operating platform -6; Second template system -7; Second frame system -8; Second embedded part system -9; Second hydraulic system -10; First rod -11; Second rod -12; First ball joint -13; Second ball joint -14; Sliding column -15; First hole section -16; Piston -17; Water tank -18; First water pipe -19; Second water pipe -20; First valve -21; Second valve -22; First cavity -23; Second cavity -24; Sealing groove -25; Sealing ring -26; Fixing frame -27; Lifting rope -28; Connecting rod -29; Connecting ring -30. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0026] Please see Figure 1-3This invention provides a technical solution: a climbing formwork system for the construction of hollow thin-walled piers, comprising an inner climbing formwork, an outer climbing formwork, and multiple connecting parts. The inner climbing formwork is disposed on the inner surface of one side wall of the hollow thin-walled pier, and the outer climbing formwork is disposed on the outer surface of the side wall. The multiple connecting parts connect the upper part of the inner climbing formwork and the upper part of the outer climbing formwork. The multiple connecting parts are spaced apart along the width direction of the side wall, that is, spaced apart along a horizontal direction perpendicular to the thickness direction of the side wall. The inner climbing formwork includes a first template system, a first frame system 1, a first embedded part system 2, and a first hydraulic system 3. The first template system includes multiple panels 4, each of which corresponds one-to-one with a multiple connecting part. The panels 4 are suspended below the corresponding connecting parts by pull ropes 5. After the multiple panels 4 are assembled, they form an inner template adapted to the side wall. The first frame system 1 is provided with a first operating platform 6. The connecting parts connect the upper part of the first frame system 1 and the upper part of the outer climbing formwork.

[0027] The climbing formwork system for hollow thin-walled pier construction described in this invention is only for one side wall of the hollow thin-walled pier. In actual construction, the climbing formwork system described in this invention needs to be installed on all four side walls of the hollow thin-walled pier, and the four climbing formwork systems described in this invention can be used to construct the hollow thin-walled pier simultaneously.

[0028] The first frame system 1, the first embedded part system 2, and the first hydraulic system 3 are all relatively mature existing technologies, therefore, the specific structure and operating principle of the first frame system 1, the first embedded part system 2, and the first hydraulic system 3 will not be described in detail here. Under the combined action of the first frame system 1, the first embedded part system 2, and the first hydraulic system 3, the inner climbing formwork can climb as a whole on the inner surface of the side wall of the hollow thin-walled pier.

[0029] The external climbing formwork includes a second template system 7, a second frame system 8, a second embedded part system 9, and a second hydraulic system 10. The second template system 7, the second frame system 8, the second embedded part system 9, and the second hydraulic system 10 are all relatively mature existing technologies; therefore, their specific structures and operating principles will not be elaborated upon here. Under the combined action of the second frame system 8, the second embedded part system 9, and the second hydraulic system 10, the external climbing formwork can climb as a whole on the outer surface of the sidewall of the hollow thin-walled pier.

[0030] The first operating platform 6 is mounted on the first frame system 1. The connecting part is connected to the upper part of the inner climbing formwork and the upper part of the outer climbing formwork. The splicing plate 4 is suspended below the corresponding connecting part by the pull rope 5. During the climbing process of the inner and outer climbing formwork, the connecting part can be driven to rise, thereby driving multiple splicing plates 4 to rise. After the multiple splicing plates 4 rise to a suitable height, the workers can assemble the multiple splicing plates 4 into an inner template that matches the side wall of the hollow thin-walled pier, and can reinforce the inner template and the second template system 7 by using tie rods. During the climbing process of the inner and outer climbing formwork, the first operating platform 6 can be driven to rise. As the height of the hollow thin-walled pier increases with the progress of construction, it is not necessary to erect the frame of the operating platform. Therefore, when using the climbing formwork system for hollow thin-walled pier construction described in this invention to construct hollow thin-walled piers, it is not necessary to use a tower crane to lift the inner formwork of the hollow thin-walled pier. After the inner climbing formwork and the outer climbing formwork are erected, it is not necessary to use a tower crane to lift the materials for the scaffolding. This can significantly reduce the frequency of tower crane use, improve construction efficiency, and reduce the risk of high-altitude operations.

[0031] Under the action of the connecting part, the outer climbing form and the inner climbing form can jointly share the weight of the splice plate 4. The weight of the splice plate 4 will not only be applied to the inner climbing form or the outer climbing form. Compared with the outer climbing form bearing the weight of the splice plate 4 alone, the climbing form system for hollow thin-walled pier construction of the present invention can reduce the load borne by the outer climbing form and improve the safety of the outer climbing form.

[0032] In this embodiment, the connecting part includes a first rod 11, a sliding part, and a second rod 12. One end of the first rod 11 is connected to the upper part of the first frame system 1, and the other end of the first rod 11 faces the outer climbing formwork. The sliding part is disposed on the first rod 11 in a manner that allows it to slide along the axis of the first rod 11. One end of the second rod 12 is connected to the sliding part, and the other end of the second rod 12 is connected to the upper part of the outer climbing formwork. Specifically, the other end of the second rod 12 is connected to the upper part of the second frame system 8. The panel 4 is suspended from the corresponding first rod 11 by the pull rope 5.

[0033] The sliding part can slide on the first rod 11 along the axis of the first rod 11. One end of the first rod 11 and the other end of the second rod 12 can move closer to or further away from each other. When the distance between the inner climbing form and the outer climbing form changes, that is, when the distance between the first frame system 1 and the second frame system 8 changes, the connecting part can adapt to the change in the distance between the first frame system 1 and the second frame system 8, so that the climbing form system for hollow thin-walled pier construction of the present invention has better flexibility of use.

[0034] In this embodiment, one end of the first rod 11 is connected to the upper part of the first frame system 1 via a first ball joint 13, and the other end of the second rod 12 is connected to the upper part of the outer climbing formwork via a second ball joint 14. Specifically, the other end of the second rod 12 is connected to the upper part of the second frame system 8 via the second ball joint 14. Specifically, the first ball joint includes a first ball seat fixed to the upper part of the first frame system 1, a first ball socket formed by recessing from the side of the first ball seat facing the second frame system 8, and a first ball disposed in the first ball socket and adapted to the first ball socket. One end of the first rod 11 is fixedly connected to the first ball. The second ball joint includes a second ball seat fixed to the upper part of the second frame system 8, a second ball socket formed by recessing from the side of the second ball seat facing the first frame system 1, and a second ball disposed in the second ball socket and adapted to the second ball socket. The other end of the second rod 12 is fixedly connected to the second ball.

[0035] With this structure, the first rod 11 can rotate up and down relative to the first frame system 1, and the second rod 12 can rotate up and down relative to the second frame system 8; and one end of the first rod 11 and the other end of the second rod 12 can move closer to or further away from each other. When the climbing speeds of the inner climbing form and the outer climbing form are not synchronized, the combined structure of the first rod 11, the sliding part, and the second rod 12 can tilt freely and automatically change its length during the tilting process. This design ensures that the inner and outer climbing molds are not easily pulled apart during the climbing process. The slower-climbing mold will not hinder the faster-climbing mold. Specifically, when the outer climbing mold's climbing speed is slow, it will not hinder the inner climbing mold's climbing, thus not increasing the load on the inner climbing mold and affecting its safety. Similarly, when the inner climbing mold's climbing speed is slow, it will not hinder the outer climbing mold's climbing, thus not increasing the load on the outer climbing mold and affecting its safety. Therefore, even if the inner and outer climbing molds climb at different speeds, the connection will not affect their safety. Furthermore, the combined structure of the first rod 11, the sliding part, and the second rod 12 will not be damaged due to the asynchronous climbing speeds of the inner and outer climbing molds.

[0036] In this embodiment, the sliding part includes a sliding column 15 and a channel. The channel is disposed within the sliding column 15, with one end connected to the end face of the sliding column 15 facing the first frame system 1, and the other end located within the sliding column 15. The first rod 11 is slidably fitted within the channel, and the second rod 12 is fixedly connected to the end of the sliding column 15 facing the outer climbing formwork. With this structure, the sliding column 15 can slide along the axial direction of the first rod 11, and the sliding part can be disposed on the first rod 11 in a manner that allows it to slide along the axial direction of the first rod 11.

[0037] In this embodiment, the connecting part further includes a limiting part, which is used to fix the relative position of the first rod 11 and the sliding column 15. When the distance between the inner climbing form and the outer climbing form does not need to change and when the inner climbing form and the outer climbing form are not in the climbing stage, the limiting part can fix the relative position of the first rod 11 and the sliding column 15, so that the length of the combined structure of the first rod 11, the sliding column 15 and the second rod 12 can be fixed. At this time, the combined structure of the first rod 11, the sliding column 15 and the second rod 12 can be held between the upper part of the first frame system 1 and the upper part of the second frame system 8, which can reduce the risk of the inner climbing form and the outer climbing form overturning and improve the safety of the climbing form system for hollow thin-walled pier construction described in this invention.

[0038] In this embodiment, the channel includes a first segment 16 and a second segment. The first segment 16 is disposed within the sliding column 15, and one end of the first segment 16 is connected to the end face of the sliding column 15 facing the first frame system 1. The second segment is disposed within the sliding column 15 and is connected to the other end of the first segment 16. The diameter of the second segment is larger than the diameter of the first segment 16. The first rod 11 is slidably fitted within the first segment 16. The limiting part includes a piston 17, a water tank 18, a first water pipe 19, a second water pipe 20, a first valve 21, and a second valve 22. The piston 17 is slidably fitted within the second segment, and the piston 17 divides the second segment into a first cavity 23 and a second cavity 24. The first cavity 23 and the second cavity 24 are respectively located in... The piston 17 has a side facing the first rod 11 and a side facing away from the first rod 11. The water container 18 is located above the sliding column 15. The upper end of the water container 18 is open, and the lower end of the water container 18 is closed. One end of the first water pipe 19 is connected to the bottom of the water container 18, and the other end of the first water pipe 19 is connected to the end of the first cavity 23 facing away from the second cavity 24. One end of the second water pipe 20 is connected to the bottom of the water container 18, and the other end of the second water pipe 20 is connected to the end of the second cavity 24 facing away from the first cavity 23. The first valve 21 is located on the first water pipe 19, and the second valve 22 is located on the second water pipe 20. The other end of the first rod 11 passes through the first hole section 16 and the first cavity 23 in sequence and is then fixedly connected to the piston 17.

[0039] Before using the climbing formwork system for hollow thin-walled pier construction described in this invention, the first cavity 23, the second cavity 24, the first water pipe 19, and the second water pipe 20 are all filled with water, so that the water container 18 contains a certain amount of water.

[0040] When the first valve 21 and the second valve 22 are open, the piston 17 can move towards or away from the first frame system 1 within the second orifice. The sliding column 15 can slide along the axis of the first rod 11. When the piston 17 moves towards the first frame system 1 within the second orifice, water in the first cavity 23 can be squeezed into the water container 18 through the first water pipe 19. Water in the water container 18 can be drawn into the second cavity 24 through the second water pipe 20, thus moving one end of the first rod 11 and the other end of the second rod 12 away from each other. When the piston 17 moves away from the first frame system 1 in the second hole section, the water in the second cavity 24 can be squeezed into the water container 18 through the second water pipe 20, and the water in the water container 18 can be sucked into the first cavity 23 through the first water pipe 19, so that one end of the first rod 11 and the other end of the second rod 12 can approach each other.

[0041] When the first valve 21 and the second valve 22 are closed, both the first cavity 23 and the second cavity 24 are filled with water and sealed, preventing the piston 17 from moving within the second orifice. Consequently, the sliding pin 15 cannot slide on the first rod 11, and the limiting part can fix the relative position of the first rod 11 and the sliding pin 15.

[0042] In this embodiment, the hole wall of the first hole segment 16 is recessed to form an annular sealing groove 25. A sealing ring 26 is provided in the sealing groove 25. The sealing ring 26 is adapted to the sealing groove 25 and is used to seal the gap between the hole wall of the first hole segment 16 and the first rod body 11. By sealing the gap between the hole wall of the first hole segment 16 and the first rod body 11 with the sealing ring 26, water in the first cavity 23 can be prevented from being squeezed out from the gap between the hole wall of the first hole segment 16 and the first rod body 11.

[0043] In this embodiment, both the first water pipe 19 and the second water pipe 20 are flexible hoses; the limiting part also includes a fixing frame 27, a suspension rope 28 and a connecting rod 29. The fixing frame 27 is fixed to the upper side of the sliding column 15, the upper end of the suspension rope 28 is fixed to the fixing frame 27, and the connecting rod 29 is fixed to the lower end of the suspension rope 28; the connecting rod 29 is fixedly connected to the upper end of the water container 18, and the lower end of the suspension rope 28 is located at the center of the upper end of the water container 18.

[0044] The center of the upper end of the water container 18 is suspended from the fixed frame 27 by the hanging rope 28. When the climbing speeds of the inner climbing form and the outer climbing form are not synchronized and the combined structure of the first rod 11, the sliding column 15 and the second rod 12 tilts, the water container 18 can still maintain a vertical state under the action of gravity, which can reduce the possibility of water in the water container 18 being poured out.

[0045] In this embodiment, the connecting part further includes a connecting ring 30, which is encircled on the first rod body 11 and slidably fitted on the first rod body 11. The upper end of the pull rope 5 is fixedly connected to the connecting ring 30, and the lower end of the pull rope 5 is fixedly connected to the corresponding splicing plate 4.

[0046] The connecting ring 30 can slide on the first rod 11, and the connecting ring 30 can drive the pull rope 5 and the splicing plate 4 to move toward or away from the outer climbing formwork, so that the splicing plate 4 can be easily moved along the thickness direction of the side wall of the hollow thin-walled pier. This makes it more convenient to install the splicing plate 4 on the side wall of the hollow thin-walled pier and to remove the splicing plate 4 from the side wall of the hollow thin-walled pier.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A climbing formwork system for the construction of hollow thin-walled piers, characterized in that: The system includes an inner climbing formwork located on the inner surface of one side wall of the hollow thin-walled pier, an outer climbing formwork located on the outer surface of the side wall, and multiple connecting parts that connect the upper part of the inner climbing formwork and the upper part of the outer climbing formwork and are spaced apart along the width direction of the side wall. The inner climbing formwork includes a template system, a frame system, an embedded part system, and a hydraulic system. The template system includes multiple panels that correspond one-to-one with the multiple connecting parts. The panels are suspended below the corresponding connecting parts by ropes. After the multiple panels are assembled, they form an inner template that fits the side wall. The frame system is equipped with an operating platform. The connecting parts connect the upper part of the frame system and the upper part of the outer climbing formwork. The connecting part includes a first rod with one end connected to the upper part of the frame system and the other end facing the outer climbing formwork, a sliding part disposed on the first rod in a manner that can slide along the axis of the first rod, and a second rod with one end connected to the sliding part and the other end connected to the upper part of the outer climbing formwork; the panel is suspended on the corresponding first rod by the pull rope. The sliding part includes a sliding column and a channel disposed in the sliding column and having one end connected to the end face of the sliding column facing the frame system; the first rod is slidably fitted in the channel, and the second rod is fixedly connected to the end of the sliding column facing the outer climbing formwork. The connecting part also includes a limiting part for fixing the relative position of the first rod and the sliding column; The channel includes a first segment disposed within the sliding column and connected at one end to the end face of the sliding column facing the frame system, and a second segment disposed within the sliding column and connected to the other end of the first segment. The diameter of the second segment is larger than the diameter of the first segment. The first rod is slidably fitted within the first segment. The limiting part includes a piston slidably fitted within the second segment and dividing the second segment into a first cavity and a second cavity; a water-holding cylinder disposed above the sliding column with an open upper end and a closed lower end; a first water pipe with one end connected to the bottom of the water-holding cylinder and the other end connected to the end of the first cavity facing away from the second cavity; a second water pipe with one end connected to the bottom of the water-holding cylinder and the other end connected to the end of the second cavity facing away from the first cavity; a first valve disposed on the first water pipe; and a second valve disposed on the second water pipe. The other end of the first rod passes through the first segment and the first cavity in sequence and is then fixedly connected to the piston.

2. The climbing formwork system for hollow thin-walled pier construction according to claim 1, characterized in that: One end of the first rod is connected to the upper part of the frame system via a first ball joint, and the other end of the second rod is connected to the upper part of the external climbing formwork via a second ball joint.

3. The climbing formwork system for hollow thin-walled pier construction according to claim 1, characterized in that: Both the first water pipe and the second water pipe are flexible hoses; the limiting part also includes a fixing frame fixed to the upper side of the sliding column, a hanging rope fixed to the upper end of the fixing frame, and a connecting rod fixed to the lower end of the hanging rope; the connecting rod is fixedly connected to the upper end of the water container, and the lower end of the hanging rope is located at the center of the upper end of the water container.

4. The climbing formwork system for hollow thin-walled pier construction according to claim 1, characterized in that: The connecting part further includes a connecting ring disposed around the first rod body. The connecting ring is slidably fitted onto the first rod body. The upper end of the pull rope is fixedly connected to the connecting ring, and the lower end is fixedly connected to the corresponding splicing plate.

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