A pile foundation reinforcement cage processing anti-deformation inner support structure

Abstract

The utility model discloses a pile foundation reinforcement cage processing anti -deformation inner support structure belongs to reinforcement cage construction technical field. Including Y shape horizontal support structure, annular fixing device and inner diameter adjusting device. The three support arms end of Y shape horizontal support structure is contacted with the main reinforcement or reinforcing bar of reinforcement cage, and provides the even radial support force, and the annular fixing device is set up in the central part of Y shape horizontal support structure, and is fixedly connected with the reinforcement cage main reinforcement through the buckle structure, and the inner diameter adjusting device is set up on the support arm, and realizes length adjustment through the screw thread connection of telescopic section, and the opening direction of buckle structure is perpendicular to the main reinforcement axis, and cooperation screw hole realizes quick assembly and disassembly. The utility model discloses through the synergic effect of Y shape support and annular fixation, combines adjustable telescopic structure, effectively prevents the oval deformation of reinforcement cage in the process of roll welding due to dead weight or external force, and the structure is simple, and the regulation is convenient, and the universality is strong, improves the processing precision and construction efficiency of reinforcement cage.

Description

Technical Field

[0001] This utility model belongs to the field of steel cage construction technology, specifically a deformation-resistant internal support structure for processing steel cages for pile foundations. Background Technology

[0002] In the field of building construction, reinforcing cages are key load-bearing components for pile foundations, bridges, culverts, and high-rise building foundations. Their manufacturing precision and structural stability directly affect the tensile strength and overall quality of concrete components. In existing technologies, reinforcing cages are prone to elliptical deformation or local instability due to external forces during roll welding, transportation, and hoisting. This is especially true when processing large or irregularly shaped reinforcing cages. Traditional anti-deformation measures, such as welding reinforcing bars and fixing external supports, suffer from uneven distribution of support force, limited adjustment range, and cumbersome installation and disassembly. These measures are difficult to adapt to the forming requirements of reinforcing cages of different specifications and can easily lead to quality defects such as misalignment of the main reinforcement spacing and insufficient protective layer thickness, which in turn affect the structural strength and durability after concrete pouring.

[0003] Chinese Patent No. CN223177014U discloses an adjustable-size internal support device for pile foundation reinforcement cages, belonging to the field of reinforcement cage construction technology. It includes an arc-shaped plate and adjustable struts. The inner arc surface of the arc-shaped plate has two hinge seats. There are three arc-shaped plates arranged in a triangular shape inside the reinforcement cage. The adjustable struts include a first strut and a second strut. One end of the first strut has a threaded rod, and one end of the second strut has a butt joint. The end of the butt joint has a movable groove, and a rotating handle is movably mounted on the butt joint. The threaded rod is threadedly connected to the rotating handle, and one end of the threaded rod is movably positioned inside the movable groove. There are three adjustable struts, and both ends of each adjustable strut are hinged to adjacent hinge seats on adjacent arc-shaped plates. This invention solves the problems of fixed dimensions, inconvenient adjustment, and difficulty in adapting to reinforcement cages of different diameters and heights in existing internal support structures for reinforcement cages. These problems not only increase construction difficulty but also limit the versatility and flexibility of reinforcement cages. The aforementioned device employs a combination structure of arc-shaped plates and adjustable struts, requiring three arc-shaped plates, a total of six hinged seats, and three adjustable struts. The large number of components and complex structure make adjustment inconvenient. Therefore, those skilled in the art urgently need to solve these technical problems. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned prior art and improve the adjustment flexibility of the device.

[0005] The technical solutions adopted in this utility model are as follows: An anti-deformation internal support structure for pile foundation reinforcement cages includes: a Y-shaped transverse support structure, an annular fixing device, and an inner diameter adjustment device; the three support arms of the Y-shaped transverse support structure are in contact with the reinforcing bars or main bars of the reinforcement cage; the annular fixing device is sleeved on the center of the Y-shaped transverse support structure and is fixedly connected to the reinforcing bar components of the reinforcement cage; the inner diameter adjustment device is set on the Y-shaped transverse support structure and forms an adjustable connection with the support arms.

[0006] By adopting the above technical solution, and through the combined design of a Y-shaped transverse support structure and a ring-shaped fixing device, combined with the adjustable characteristics of the inner diameter adjustment device, the problem of elliptical deformation caused by external forces during the roll welding process of the rebar cage is solved. The three support arms of the Y-shaped transverse support structure directly contact the reinforcing ribs or main ribs of the rebar cage, providing uniform radial support force. The ring-shaped fixing device is fitted at the center of the support structure and fixedly connected to the rebar assembly of the rebar cage, ensuring the overall structural stability. The inner diameter adjustment device, through its adjustable connection with the support arms, adapts to the needs of rebar cages of different diameters, thereby achieving dynamic adjustment and precise positioning during the processing, significantly improving the forming accuracy and construction efficiency of the rebar cage.

[0007] Furthermore, the support arm is made of alloy steel, and its end is provided with an arc-shaped groove that contacts the main reinforcement or reinforcing bars of the steel cage.

[0008] By adopting the above technical solution, the support arm is made of high-strength alloy steel, and an arc-shaped groove matching the main bars or reinforcing bars of the rebar cage is set at its end, effectively solving the problem of local stress concentration or slippage that is easily caused by traditional rigid contact methods. The curved surface design of the arc-shaped groove increases the contact area between the support arm and the rebar, making the force distribution more uniform. At the same time, the alloy steel material has excellent resistance to deformation and can withstand the vibration and external impact during the rolling welding operation, avoiding deformation of the support structure itself, thereby ensuring the geometric stability of the rebar cage during processing and transportation.

[0009] Furthermore, the annular fixing device is provided with at least three buckle structures, the opening direction of the buckle structures is perpendicular to the axis of the main reinforcement of the steel cage, and the buckle structures are fixedly connected to the main reinforcement through threaded holes.

[0010] By adopting the above technical solution, the ring-shaped fixing device is equipped with at least three snap-fit ​​structures, the opening direction of which is perpendicular to the axis of the main reinforcement bar of the steel cage. These structures are fixedly connected to the main reinforcement bar through threaded holes, solving the problems of time-consuming and material-intensive traditional fixing methods and difficulty in disassembly. The vertical opening design of the snap-fit ​​structure ensures that the snap-fit ​​direction is orthogonal to the axis of the reinforcement bar, avoiding connection failure due to inconsistent force directions. The threaded holes allow for quick fixing and disassembly using bolts, improving construction efficiency, facilitating the reuse of the device, and reducing construction costs.

[0011] Furthermore, the inner diameter adjustment device includes a telescopic joint distributed along the axis of the support arm. The telescopic joint consists of two sleeved tubular structures, and the two tubular structures are connected by threads.

[0012] By adopting the above technical solution, the inner diameter adjustment device uses expansion joints distributed along the axis of the support arm, consisting of two sleeved tubular structures connected by threads. This solves the problems of complex adjustment mechanisms or limited adjustment range in existing technologies. The threaded connection design makes the adjustment operation of the expansion joint simple and intuitive; length adjustment can be completed simply by rotating it. Furthermore, the sleeved connection of the two tubular structures ensures the structural rigidity after adjustment, avoiding loosening or displacement caused by frequent adjustments. This allows for flexible adaptation to steel cages of different diameters while maintaining the stability of the support structure.

[0013] Furthermore, the three support arms of the Y-shaped transverse support structure are symmetrically distributed in the horizontal plane, and the central axis of the annular fixing device coincides with the axis of the steel cage.

[0014] By adopting the above technical solution, the three support arms of the Y-shaped transverse support structure are symmetrically distributed in the horizontal plane, and the central axis of the ring fixing device coincides with the axis of the reinforcing cage. This solves the problem of elliptical deformation of the reinforcing cage caused by uneven stress in traditional support structures. The symmetrically distributed support arms ensure that the radial support force is evenly distributed, avoiding deformation caused by excessive local stress. The design of the coincident central axis ensures that the support device and the reinforcing cage are coaxial, eliminating the influence of eccentric loads, thereby significantly improving the geometric accuracy and construction quality of the reinforcing cage.

[0015] Furthermore, the inner side of the snap-fit ​​structure is provided with an installation hole that matches the diameter of the main rib, and the outer side of the snap-fit ​​structure is provided with a boss that is fixedly connected to the annular fixing device.

[0016] By adopting the above technical solution, the inner side of the snap-fit ​​structure is provided with mounting holes that match the diameter of the main reinforcement bar, and the outer side is provided with a boss that is fixedly connected to the annular fixing device. This solves the problem of unstable fixing caused by mismatched contact surfaces in traditional snap-fit ​​structures. The fitting design of the mounting holes with the main reinforcement bar increases the contact area between the snap-fit ​​and the reinforcement bar, improving the fixing strength. The setting of the boss, through rigid connection with the annular fixing device, further enhances the overall stability of the snap-fit ​​structure, avoiding the risk of falling off due to vibration or external force, thereby ensuring the structural integrity of the reinforcement cage during the rolling welding and transportation process.

[0017] Furthermore, the outer surface of the tubular structure of the telescopic joint is provided with anti-slip texture, and the inner surface is provided with positioning holes for fixed connection with the support arm.

[0018] By adopting the above technical solution, the outer surface of the tubular structure of the expansion joint is provided with anti-slip texture, and the inner surface is provided with positioning holes for fixed connection with the support arm, which solves the problems of easy slippage or inaccurate positioning of traditional expansion joints. The anti-slip texture on the outer surface increases friction to prevent relative displacement of the expansion joint due to external forces after adjustment, while the positioning holes on the inner surface, through cooperation with the support arm, ensure that the expansion joint is accurately fixed in the adjusted position, thereby improving the reliability and repeatability of inner diameter adjustment and avoiding dimensional deviations in the reinforcing cage caused by adjustment errors.

[0019] Furthermore, the Y-shaped lateral support structure is fixed to the annular fixing device by a detachable connector, which includes a bolt that passes through the annular fixing device and the support arm.

[0020] By adopting the above technical solution, the Y-shaped transverse support structure and the ring-shaped fixing device are fixed together by a detachable connector, which includes a bolt running through both. This solves the problems of difficult disassembly and low reusability associated with traditional welding or riveting methods. The bolt connection design allows for rapid installation and disassembly, enabling the support structure to be removed from the reinforcing cage without destructive operations. This facilitates multiple reuses of the device, reduces waste of construction materials, and is suitable for the rapid replacement of reinforcing cages of different specifications, significantly improving construction flexibility and economic efficiency.

[0021] This utility model has the following beneficial effects: 1. This utility model solves the problem of elliptical deformation of the rebar cage caused by external force during the roll welding process by combining the Y-shaped transverse support structure with the ring fixing device and the adjustable characteristics of the inner diameter adjustment device. Through the uniformly distributed radial support force and coaxial fixing structure, the geometric accuracy and construction quality of the rebar cage are significantly improved. 2. This utility model solves the problem of local stress concentration or slippage caused by the traditional rigid contact method by combining the support arm made of alloy steel with the arc-shaped groove. The curved contact expands the stress area and enhances the resistance to deformation, thus ensuring the geometric stability of the steel cage during processing and transportation. 3. This utility model solves the problems of time-consuming and material-intensive traditional fixing methods and difficulty in disassembly by using a buckle structure with a vertical opening on the ring-shaped fixing device and a threaded hole. By combining quick snap-fit ​​and bolt fixing, it significantly improves construction efficiency and reduces material waste. 4. This utility model solves the problems of complex adjustment mechanisms or limited adjustment range in the prior art by using the threaded connection structure and anti-slip texture design of the expansion joint. It can accurately adapt to the needs of steel cages of different diameters by using rotation adjustment and positioning hole cooperation. At the same time, the anti-slip texture enhances the structural stability and avoids dimensional deviations caused by displacement after adjustment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure for fixing the main reinforcing bar of this utility model.

[0023] Among them, 1-Y-shaped transverse support structure; 2-ring fixing device; 3-inner diameter adjustment device; 4-support arm; 5-arc groove; 6-buckle structure; 7-threaded hole; 8-expansion joint; 9-mounting hole; 10-boob; 11-anti-slip texture; 12-positioning hole; 13-connector; 14-main reinforcement; 15-stirrup. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0025] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0026] Reference Figure 1 , Figure 2As can be seen, this utility model discloses an anti-deformation internal support structure for pile foundation reinforcement cages. The Y-shaped transverse support structure 1 serves as the core load-bearing component, with its three support arms 4 symmetrically distributed in the horizontal plane, forming a stable three-dimensional radial support system. An annular fixing device 2 is fitted onto the central intersection of the Y-shaped transverse support structure 1 and rigidly fixed to the support arms 4 via a detachable connector 13. This connector 13 includes bolts penetrating the annular fixing device 2 and the support arms 4, ensuring no relative displacement between them in the axial and radial directions. The ends of the three support arms 4 of the Y-shaped transverse support structure 1 contact the reinforcing ribs or main ribs of the reinforcement cage, providing uniform radial support force to the reinforcement cage and preventing elliptical deformation during the rolling welding process. An inner diameter adjustment device 3 is arranged along the axial direction of the support arms 4, specifically including an expansion joint 8. This expansion joint 8 consists of two sleeved tubular structures, one fixed to the support arm 4 and the other sliding axially, with length adjustment achieved through a threaded connection, thereby changing the overall outer diameter of the Y-shaped transverse support structure 1 to accommodate reinforcement cages of different diameters. The tubular structure of the expansion joint 8 has anti-slip textures 11 on its outer surface and positioning holes 12 on its inner surface. These positioning holes 12 mate with corresponding holes on the support arm 4 to ensure reliable locking after adjustment. The annular fixing device 2 has at least three snap-fit ​​structures 6 evenly distributed around its circumference, with their openings perpendicular to the axis of the main reinforcing bars of the steel cage, facilitating lateral insertion of the main reinforcing bars. Each snap-fit ​​structure 6 is securely connected to the main reinforcing bars of the steel cage through its internal threaded hole 7, thus firmly integrating the entire inner support structure with the steel cage into a single unit. The inner side of the snap-fit ​​structure 6 has mounting holes 9 matching the diameter of the main reinforcing bars to increase the contact area and prevent slippage. Its outer side has a boss 10, which is welded or bolted to the annular fixing device 2 to ensure the stability and load-bearing capacity of the snap-fit ​​structure 6. During installation, the length of the expansion joint 8 is first adjusted according to the diameter of the reinforcing cage, ensuring that the arc-shaped groove 5 at the end of the support arm 4 accurately abuts against the main reinforcement or reinforcing bar. Then, the ring-shaped fixing device 2 is fixed to the main reinforcement bar using the snap-fit ​​structure 6. Finally, bolts are used to lock the Y-shaped transverse support structure 1 to the ring-shaped fixing device 2, completing the overall assembly. This structure is rationally designed, with tight connections and accurate positioning between components, effectively ensuring the geometric stability of the reinforcing cage throughout the entire processing.

[0027] In one embodiment, refer to Figure 2It can be seen that this device, through the synergistic effect of the inner diameter adjustment device and the Y-shaped transverse support structure, achieves adaptive adjustment of the position of the main reinforcement 14 of the steel cage. The main reinforcement 14 is installed inside the stirrups 5, and the stirrups 15 are circular structures, ensuring that the support structure can accurately adapt to steel cages of different diameters and specifications. Firstly, the inner diameter adjustment device 3 is integrated into the three support arms 4 of the Y-shaped transverse support structure 1. Each support arm 4 is equipped with an expansion joint 8 along its axial direction. This expansion joint consists of two sleeved tubular structures, with the inner tube fixed to the main body of the support arm and the outer tube sliding axially. The length is continuously adjusted via a threaded connection. When adapting to steel cages of different diameters, the operator can manually rotate the outer tube of the expansion joint 8, using the threaded transmission principle to push or pull back the outer tube, thereby changing the overall length of the support arm 4 and adjusting the outer diameter of the Y-shaped transverse support structure 1. Since the three support arms 4 are symmetrically distributed at 120 degrees in the horizontal plane, synchronous adjustment of the three expansion joints 8 can achieve equidistant expansion or contraction, ensuring uniform distribution of radial support force and preventing deformation of the steel cage due to eccentric force. During adjustment, the inner tube of the expansion joint 8 has positioning holes 12, while the outer tube is equipped with locking screws or snap-fit ​​mechanisms. These screws can be inserted into the positioning holes for mechanical locking after adjustment, preventing retraction or slippage during welding vibration. Simultaneously, the outer tube surface has anti-slip textures 11, facilitating grip and increasing friction, thus improving adjustment accuracy and safety. Once the support arm 4 is adjusted to its length, its arc-shaped groove 5 at its end will accurately fit the surface of the main reinforcement bar 14 or reinforcing bar of the steel cage. The arc design matches the outer diameter of the reinforcement bar, increasing the contact area, reducing stress concentration, and improving support stability. Meanwhile, the annular fixing device 2 is fitted at the center of the Y-shaped transverse support structure 1 and is fixedly connected to the support arm 4 via detachable connectors such as bolts, ensuring the structural rigidity of the entire support system. The annular fixing device 2 has multiple snap-fit ​​structures 6, with openings perpendicular to the axis of the main reinforcement bar 14. The inner side has mounting holes 9 matching the diameter of the main reinforcement bar 14, allowing the main reinforcement bar 14 to be inserted laterally and locked with threaded holes 7, thereby firmly binding the inner support structure to the steel cage. This snap-fit ​​method allows for flexible alignment and fixation to the main reinforcement bar 14 at any position even after adjusting the length of the support arm. The entire adjustment process requires no special tools and does not rely on welding or riveting; it can be completed simply by manual rotation and snap-fitting. It is easy to operate, responds quickly, and is suitable for the varied working conditions required on construction sites. Through the above structural design, this device can not only adapt to steel cages of different diameters but also dynamically adjust the support points according to the actual distribution of the main reinforcement bars 14. This effectively prevents elliptical deformation caused by self-weight or external forces during the rolling welding process, significantly improving the forming quality and construction efficiency of the steel cage.

[0028] Working Principle: Through the synergistic action of the Y-shaped transverse support structure 1, the annular fixing device 2, and the inner diameter adjustment device 3, the problem of elliptical deformation caused by the self-weight and external force collision of the rebar cage during the roll welding process is effectively solved. When the device is installed inside the rebar cage, the length of the telescopic joints 8 on the three support arms 4 is first changed by adjusting them, so that the outer diameter of the Y-shaped transverse support structure 1 matches the inner diameter of the rebar cage. This ensures that the arc-shaped grooves 5 at the ends of each support arm accurately abut against the main bars or reinforcing bars of the rebar cage, forming a three-point evenly distributed radial support system. Since the three support arms are arranged symmetrically at 120° in the horizontal plane, this structure can provide a balanced reaction force in the circumferential direction, effectively resisting the local collapse of the rebar cage caused by its own weight and the centrifugal force when the roll welding machine rotates, preventing it from undergoing elliptical deformation. The annular fixing device 2 is fitted at the central intersection of the Y-shaped transverse support structure 1 and is rigidly connected to the support arm via detachable connectors such as bolts. Simultaneously, multiple snap-fit ​​structures 6 on its periphery are vertically snapped into and fixed to the main reinforcement bars of the steel cage via threaded holes 7, ensuring the entire inner support structure forms a stable whole with the steel cage and preventing relative slippage or loosening during rolling. The inner diameter adjustment device 3 adopts a threaded expansion joint structure, which not only achieves stepless adjustment to adapt to steel cages of different diameters but also ensures reliable locking of the adjusted position through positioning holes 12 and anti-slip textures 11, improving the device's versatility and reusability. Compared to the shortcomings of traditional fixed-size support frames, such as inability to adjust and tendency to cause stress concentration, and the cumbersome installation of external supports that interfere with welding operations, this device achieves active constraint on the geometry of the steel cage through an internal adaptive support method without interfering with the welding process. Its Y-shaped transverse support structure 1 is designed with optimized force transmission paths, and the alloy steel support arms ensure high strength and deformation resistance. The snap-fit ​​fixing method facilitates quick installation and disassembly, significantly improving construction efficiency and reducing material waste.

[0029] The three support arms 4 of the Y-shaped transverse support structure 1 contact the main reinforcement or reinforcing bars of the steel cage at their ends through arc-shaped grooves 5, forming a three-point symmetrical radial support system. This system is evenly distributed at 120° in the horizontal plane, effectively dispersing the radial pressure on the steel cage and resisting localized collapse caused by its own weight and dynamic external forces during the welding process, thus preventing structural instability and deformation. The annular fixing device 2 is fitted at the center of the Y-shaped transverse support structure 1 and is fixedly connected to the support arm 4 via detachable connectors such as bolts. Simultaneously, multiple snap-fit ​​structures 6 on its outer periphery connect to the main reinforcement of the steel cage through threaded holes 7. The vertical clamping of the reinforcing bars firmly integrates the entire internal support structure with the reinforcing cage, preventing relative displacement or loosening during rolling and significantly improving the stability of the support system. The inner diameter adjustment device 3 is integrated into the telescopic joint 8 on the support arm 4. Length adjustment is achieved through a threaded connection of two sleeve-like pipe structures. Combined with the positioning hole 12 and anti-slip texture 11, the outer diameter of the support structure can be quickly and accurately adjusted without the use of special tools to accommodate reinforcing cages of different diameters. This solves the problem of poor versatility and difficulty in matching various specifications of reinforcing cages with traditional fixed-size support devices. The three components work synergistically: the inner diameter adjustment device 3 achieves size self-adaptation, ensuring accurate alignment of the support point with the main reinforcing bar; the Y-shaped transverse support structure 1 provides uniform and reliable radial support force, preventing elliptical deformation; and the annular fixing device 2 provides rigid fixation in both the axial and circumferential directions, ensuring overall structural stability.

[0030] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solution of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A deformation-resistant internal support structure for pile foundation steel cage fabrication, characterized in that, include: The Y-shaped transverse support structure (1), the ring fixing device (2), and the inner diameter adjustment device (3) are provided. The ends of the three support arms (4) of the Y-shaped transverse support structure (1) are in contact with the reinforcing bars or main bars of the steel cage. The ring fixing device (2) is sleeved on the center of the Y-shaped transverse support structure (1) and is fixedly connected to the steel reinforcement assembly of the steel cage. The inner diameter adjustment device (3) is set on the Y-shaped transverse support structure (1) and forms an adjustable connection with the support arms (4).

2. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 1, characterized in that, The support arm (4) is made of alloy steel and has an arc-shaped groove (5) at its end that contacts the main bar or reinforcing bar of the steel cage.

3. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 1, characterized in that, The annular fixing device (2) is provided with at least three buckle structures (6). The opening direction of the buckle structure (6) is perpendicular to the axis of the main reinforcement of the steel cage. The buckle structure (6) is fixedly connected to the main reinforcement through threaded holes (7).

4. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 1, characterized in that, The inner diameter adjustment device (3) includes a telescopic joint (8) distributed along the axis of the support arm (4). The telescopic joint (8) consists of two sleeved tubular structures, and the two tubular structures are connected by threads.

5. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 1, characterized in that, The three support arms (4) of the Y-shaped transverse support structure (1) are symmetrically distributed in the horizontal plane, and the central axis of the ring fixing device (2) coincides with the axis of the steel cage.

6. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 3, characterized in that, The inner side of the snap-fit ​​structure (6) is provided with an installation hole (9) that matches the diameter of the main reinforcement, and the outer side of the snap-fit ​​structure (6) is provided with a boss (10) that is fixedly connected to the annular fixing device (2).

7. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 4, characterized in that, The outer surface of the tubular structure of the expansion joint (8) is provided with anti-slip texture (11), and the inner surface is provided with positioning holes (12) that are fixedly connected to the support arm (4).

8. The anti-deformation internal support structure for pile foundation reinforcement cages according to claim 1, characterized in that, The Y-shaped transverse support structure (1) is fixed to the annular fixing device (2) by a detachable connector (13), the connector (13) including a bolt that passes through the annular fixing device (2) and the support arm (4).

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