Concrete hollow cylinder flexible reinforcement device and construction method thereof

Abstract

A concrete hollow cylinder flexible reinforcement device and its construction method are used for the reinforcement of the inner and outer formwork of a hollow cylinder, comprising: an outer formwork assembly comprising a plurality of arc-shaped concave plates for fitting the outer formwork of the hollow cylinder; an inner formwork assembly comprising a plurality of arc-shaped convex plates for fitting the inner formwork of the hollow cylinder; vertical upright rods for connecting the arc-shaped concave plates and the arc-shaped convex plates, converting the radial fastening force of multiple layers into uniform load; an inner support sleeve arranged inside the hollow cylinder formwork, horizontally supporting the outer formwork and the inner formwork; an adjusting assembly comprising a rotating handle arranged on one side of the outer formwork assembly, a supporting clamp arranged on one side of the inner formwork assembly, a sliding support connected with the supporting clamp, and a threaded steel cable. The construction safety and environmental adaptability are significantly improved, the traditional rigid connection is replaced by flexible tensioning, the problems of reinforcement spacing limitation and internal collision are effectively avoided, and the original structure design does not need to be changed.

Description

Technical Field

[0001] This application belongs to the technical field of auxiliary equipment for building engineering, and in particular relates to a flexible reinforcement device for hollow concrete cylinders and its construction method. Background Technology

[0002] With the rapid development of the construction industry, building shapes are becoming increasingly complex. Hollow circular concrete columns, due to their excellent load-bearing performance and aesthetic appeal, are widely used in high-rise buildings, bridges, and other projects. However, existing construction techniques for hollow columns still have many shortcomings. Traditional methods often employ centrifugal molding, which, while improving component density, requires significant equipment investment and has limited applicability. Another common method is the core-pulling method, where, after the reinforcing steel frame is installed, an airbag or steel pipe core mold is placed in a mold and concrete is poured. After the concrete has initially set, the core mold is removed to form a hollow structure. While this method is lower in cost, the internal supports cannot be effectively fixed, leading to eccentricity during pouring, affecting the thickness of the protective layer, and consequently impacting structural durability and safety.

[0003] Furthermore, traditional construction methods often use bolts to reinforce the formwork. However, when the spacing between reinforcing bars is small, the bolts cannot easily pass through the gaps, often requiring the spacing to be increased, altering the design intent and affecting the structural load-bearing capacity. For double-curved structures (circular formwork connected to steel pipes), traditional linear fixing methods struggle to achieve a good fit, resulting in poor fixing effectiveness. For small hollow cylinders, the limited internal space makes bolted connections prone to collisions, hindering construction operations and impacting efficiency and quality.

[0004] Therefore, there is an urgent need for a hollow cylindrical formwork reinforcement device and method that can adapt to various rebar spacings, is flexible in construction, has good fixing effect, and is reusable. Summary of the Invention

[0005] This application provides a flexible reinforcement device for hollow concrete cylinders and its construction method, which solves the technical problems of easy eccentricity, limited spacing of reinforcing bars, unstable fixing and difficult dismantling in the reinforcement of hollow cylinders.

[0006] To solve at least one of the above-mentioned technical problems, the technical solution adopted in this application is:

[0007] A flexible reinforcement device for hollow concrete cylinders, used for reinforcing the inner and outer formwork of hollow cylinders, comprising:

[0008] The outer template assembly includes several arc-shaped concave plates for fitting the outer template of the hollow cylinder; the arc-shaped concave plates form several layers of annular radial fastening forces along the height of the outer template assembly;

[0009] The inner template assembly includes several arc-shaped protrusions for fitting the inner template of the hollow cylinder; the arc-shaped protrusions form several layers of annular radial support along the height of the inner template assembly;

[0010] Vertical support poles are set along the height of the hollow cylindrical template to connect the arc-shaped concave plate and the arc-shaped convex plate in series, converting the multi-layer radial fastening force into a uniformly distributed load;

[0011] An inner support sleeve is installed inside the hollow cylindrical template to horizontally support the outer template and the inner template.

[0012] The adjustment assembly includes a rotating handle located on one side of the outer template assembly, a support clamp located on one side of the inner template assembly, a sliding support column connected to the support clamp, and a threaded steel cable.

[0013] One end of the threaded steel cable is connected to the sliding support, and the other end passes through the inner support sleeve and is movably connected to the rotating handle. Pressing down on the rotating handle causes it to rotate counterclockwise and eventually become parallel to the outer template wall, thereby securing the hollow cylindrical template.

[0014] Furthermore, the side of the arc-shaped concave plate that fits against the outer template has a curved surface structure, and the side away from the outer template has a slot that mates with the vertical pole.

[0015] Furthermore, the side of the arc-shaped convex plate that fits against the inner template is also a curved surface structure, and the side away from the inner template has a slot that mates with the vertical pole.

[0016] Furthermore, each of the arc-shaped convex plates and arc-shaped concave plates is provided with an directional clamp for holding its body, so as to fix and clamp the vertical pole.

[0017] Furthermore, the sliding support column cooperates with the support clamp to pull the movable end of the threaded steel cable, thereby moving the sliding support column connected to the fixed end of the threaded steel cable, thereby expanding the opening of the support clamp to support and fix the inner template, or narrowing the opening of the support clamp to loosen the support of the inner template.

[0018] Furthermore, the top end of the rotating handle is pivotally connected to the vertical pole via a pivot shaft, and the other end of the handle is provided with a spool for winding the threaded steel cable; when the rotating handle is rotated to be parallel to the outer template wall, the threaded steel cable is tensioned to complete the fastening of the hollow cylindrical template.

[0019] Further, a frustum-shaped wire threading hole is provided on the rotary handle, and its large-diameter end is arranged on the side of the pivot end of the rotary handle. The wire threading cable enters from the large-diameter opening of the frustum-shaped wire threading hole, and when the movable end thereof is tensioned, the small-diameter opening of the frustum-shaped wire threading hole can prevent it from returning, playing a one-way blocking role.

[0020] Further, the vertical立杆 is a long rod with a U-shaped groove cross-section structure; the adjusting component is arranged in the U-shaped groove and is configured between adjacent two layers of the arc-shaped convex plates and the arc-shaped concave plates.

[0021] Further, the extension lines of the inner support sleeves all intersect at the axis of the hollow cylinder, and all the inner support sleeves of each layer form a "rice" character structure.

[0022] A construction method of the concrete hollow cylinder flexible reinforcement device as described in any one of the above, the steps include:

[0023] S1. Install the outer template and the inner template of the hollow cylinder;

[0024] S2. Connect the arc-shaped concave plate and the arc-shaped convex plate to the vertical立杆 respectively, and install them to the specified positions on the outside of the outer template and the inside of the inner template respectively;

[0025] S3. Install the rotary handle on one side of the outer template, and install the support clamp and the sliding pillar on one side of the inner template;

[0026] S4. Place the inner support sleeve inside the hollow cylinder, and pass the wire threading cable through the rotary handle, the inner support sleeve and the support clamp in sequence;

[0027] S5. Connect one end of the wire threading cable to the rotary handle movably, and fix the other end to the sliding pillar;

[0028] S6. Tension the wire threading cable to move the sliding pillar, expand the opening of the support clamp, and press tightly against the inner template;

[0029] S7. After the outer template and the inner template are fastened, pour concrete;

[0030] S8. After the concrete begins to set, release the tension of the wire threading cable and remove the inner template assembly;

[0031] S9. Draw out the wire threading cable and the inner support sleeve, and remove the outer template.

[0032] A flexible reinforcement device for concrete hollow cylinders designed with this application can significantly improve construction safety and environmental adaptability. By using flexible tension instead of traditional rigid connections, it effectively avoids the limitations of steel bar spacing and internal collision problems without changing the original structural design. The unique combination of the arc-shaped fastening method and the "rice" - shaped support method can convert the linear concentrated force generated by flexible tension into a uniform load acting on the inner and outer side templates, greatly enhancing the stability of the templates and fundamentally solving the problem of core mold eccentricity. The device supports the non-destructive disassembly and reuse of each component. In particular, the threading steel cable can be easily withdrawn from the inner support sleeve, enabling multiple turnovers. The operation is simple and the cost is low, ensuring no disturbance during the concrete pouring process and guaranteeing the quality of the template components and the overall structural accuracy. This application also proposes a construction method for the flexible reinforcement device for concrete hollow cylinders. Brief Description of the Drawings

[0033] Figure 1 is the overall three-dimensional view of the flexible reinforcement device for concrete hollow cylinders in this application;

[0034] Figure 2 is the top view of the flexible reinforcement device for concrete hollow cylinders in this application;

[0035] Figure 3 is the side view of the flexible reinforcement device for concrete hollow cylinders in this application;

[0036] Figure 4 is the schematic diagram of a single-sided section in the flexible reinforcement device in this application.

[0037] In the figure: 10, hollow cylinder; 20, outer template assembly; 21, outer template; 22, arc-shaped concave plate; 23, orientation fixture; 30, inner template assembly; 31, inner template; 32, arc-shaped convex plate; 40, vertical stand column; 50, inner support sleeve; 60, adjustment component; 61, rotating handle; 62, support fixture; 63, sliding pillar; 64, threading steel cable; 65, frustum-shaped threading hole; 66, manual turntable. Detailed Description of the Preferred Embodiment

[0038] The following will describe this application in detail with reference to the drawings and specific embodiments.

[0039] This embodiment proposes a flexible reinforcement device for concrete hollow cylinders, as Figure 1As shown, the reinforcement of the inner and outer formwork of the hollow cylinder 10 mainly includes five components: an outer formwork assembly 20 forming the outer formwork, an inner formwork assembly 30 forming the inner formwork, several vertical poles 40, several inner support sleeves 50 connecting the inner and outer formwork, and an adjustment assembly 60 for flexible tension reinforcement. The reinforcement device proposed in this embodiment, through its unique structural design, can significantly improve construction safety and environmental adaptability. It utilizes flexible tensioning to replace traditional rigid connections, effectively avoiding the limitations of rebar spacing and internal collision problems without altering the original structural design. Through a unique combination of arc-shaped fastening and "rice"-shaped support, linear forces can be converted into uniformly distributed loads, greatly enhancing the stability of the inner and outer formwork reinforcement and completely solving the problem of core mold eccentricity. Simultaneously, the entire reinforcement device supports non-destructive flexible extraction and multiple reuses, is easy to operate and low in cost, ensures undisturbed concrete pouring, and guarantees the quality of the formwork components and the overall structural accuracy.

[0040] like Figure 1 As shown, the outer template assembly 20 is a module used to fix the outer template 21 in the hollow cylinder 10. It includes the outer template 21 and several arc-shaped concave plates 22 for attaching to and reinforcing the outer template 21. Since the outer template 21 encloses a circular cylindrical structure, the inner wall of the arc-shaped concave plate 22 must also be set tightly against the outer cylindrical wall. That is, the side of the arc-shaped concave plate 22 that is attached to the outer template 21 is a curved structure, and the side away from the outer template 21 has slots that mate with the vertical pole 40.

[0041] Specifically, each arc-shaped concave plate 22 is composed of two symmetrically arranged arc-shaped plates with curvatures matching those of the outer template 21. This modular design not only facilitates processing but also makes loading and unloading easy. The two symmetrical concave plates are clamped by a directional clamp 23 to form an integral arc-shaped concave plate 22 structure. The directional clamp 23 also has a notch to avoid the slot, allowing the vertical support 40 to engage with the slot.

[0042] The directional clamp 23 is used to securely connect two symmetrical arc-shaped plates into a single unit to ensure that they do not shift relative to each other under load. Its structure typically includes upper and lower clamping members, fastened with bolts; this is a common component in the art, and is not shown in the attached diagram.

[0043] The arc-shaped concave plates 22 are arranged in layers along the height direction of the hollow cylinder, and each layer forms a radial layer annular fastening band around the outer template 21. In this embodiment, each radial layer is provided with four sets of symmetrically arranged arc-shaped concave plates 22, and a transverse fastening force is formed on the outer diameter surface of the outer template 21 through the inner support sleeve 50 and the adjusting component 60.

[0044] Correspondingly, the inner template assembly 30 is a module of the inner template 31 of the hollow cylinder 10, which includes several inner templates 31 and several arc-shaped protrusions 32 for fitting the inner templates 31. The side of the arc-shaped protrusion 32 that fits the inner template 31 is also a curved structure, and the side away from the inner template 31 has a slot that mates with the vertical pole 40.

[0045] The arc-shaped convex plate 32 and the arc-shaped concave plate 22 have similar structural design concepts. Both are composed of two symmetrically arranged arc-shaped plates with curvatures matching the inner template 31, and are fixedly connected together by a directional clamp 23. In this embodiment, each arc-shaped convex plate 32 and arc-shaped concave plate 22 is provided with a directional clamp 23 for holding its body, facilitating fixed clamping with the vertical pole 40.

[0046] The arc-shaped protrusions 32 form several layers of annular radial layers along the height direction of the inner template 31, and each radial layer is provided with four sets of symmetrically arranged arc-shaped protrusions 32, which form a transverse support force on the inner diameter surface of the inner template 31 through the inner support sleeve 50 and the adjustment component 60.

[0047] The vertical support 40 is a long rod with a U-shaped groove structure in cross-section, which is set vertically along the height direction of the hollow cylinder. Its main function is to connect the arc-shaped concave plates 22 and arc-shaped convex plates 32 located on the same vertical line at different heights, thereby converting the radial fastening force and supporting force of multiple layers into a uniformly distributed load.

[0048] The inner support sleeve 50 is a hollow round steel pipe. In the installation state, its two ends abut against the inner template 31 and the outer template 21 respectively, and it is located inside the template of the hollow cylindrical column 10. The outer template 21 and the inner template 31 are connected by a threaded steel cable 64. After the hollow cylindrical column 10 is poured, the threaded steel cable 64 is pulled out from the inner support sleeve 50 so that the inner support sleeve 50 is completely buried in the concrete cylindrical column.

[0049] like Figure 2 As shown, on the horizontal projection plane, the center extension lines of the inner support sleeves 50 all converge at the axis of the hollow cylinder 10. That is, all the inner support sleeves 50 on each radial plane form a "rice" shaped structure to fix the inner template 21 and the outer template 31 from six directions, forming a stable fixing mechanism.

[0050] like Figure 3 As shown, the adjustment component 60 is mainly installed in the U-shaped groove of the vertical pole 40, and its installation position is located between the radial layers formed by the arc-shaped convex plate 32 and the arc-shaped concave plate 22 of the two adjacent layers. That is, the adjustment component 60 is staggered with the radial layers of the arc-shaped convex plate 32 and the arc-shaped concave plate 22, which can improve its strength in fixing the inner and outer templates.

[0051] like Figure 4 As shown, the adjustment component 60 is the core component for achieving flexible tensioning and fastening. It includes a rotating handle 61 located on one side of the outer template component 20, a support clamp 62 located on one side of the inner template component 30, a sliding support column 63 connected to the support clamp 62, and a threaded steel cable 64 passing through the inner support sleeve 50. Each inner support sleeve 50 is equipped with a set of adjustment components 60.

[0052] The support clamp 62 consists of two clamping plates pivotally connected at one end to form an openable clamping structure. The support clamp 62 is installed on the vertical uprights 40 adjacent to the inner template 31, and has a certain opening adjustment capability (this is a conventional operation in the field, and the figure is omitted). The clamping or loosening of the inner template 31 is achieved by changing the opening size.

[0053] The sliding support column 63 is located on the outside of the support clamp 62 and is slidably connected to the support clamp 62; then the sliding support column 63 and the support clamp 62 cooperate to form a sliding fit pair. The sliding support column 63 is a movable support component, which is a columnar structure. Its horizontal movement can drive the support clamp 63 to expand or contract, so as to tighten or loosen the inner template 31.

[0054] One end of the threaded steel cable 64 is connected to the middle of the sliding support 63, and the other end passes through the inner support sleeve 50 and is then wound around the spool at the lower end of the rotating handle 61 along the upper wall surface of the rotating handle 61. The spool can be rotated by the manual turntable 66 to tighten the length of the threaded steel cable 64.

[0055] The working principle of this embodiment is as follows: Press down on the rotating handle 61 to make it rotate counterclockwise and gradually become parallel to the wall surface of the outer template 21. During this process, the threaded steel cable 64 is gradually tensioned. The tension force simultaneously drives the manual turntable 66 (or directly rotates the handle) to gradually tighten the threaded steel cable 64, causing the sliding support 63 to move towards the opening direction of the support clamp 62 (i.e., towards the inner template 31), forcing the opening of the support clamp 62 to gradually expand, thereby pressing against the inner template 31 and achieving reliable fastening of the inner template.

[0056] Conversely, when the formwork needs to be removed, releasing the rotating handle 61 and driving the manual turntable 66 in the opposite direction releases the tension of the threaded steel cable 64. The sliding support 63 then retracts, and the opening of the support clamp 62 narrows, thus releasing the support on the inner formwork 31. Through the sliding engagement of the sliding support 63 and the support clamp 62, the flexible tension of the threaded steel cable 64 is converted into a rigid supporting force on the inner formwork 31, ensuring that the inner formwork 31 of the hollow cylinder 10 does not shift or become eccentric during concrete pouring, effectively solving the problem of the inability to fix the internal support in traditional core-pulling processes. This design allows for simultaneous driving of the sliding support 63 and the support clamp 62 with a single steel cable, achieving a rapid operation mode of "tightening with a pull and retracting with a release," eliminating the need for complex bolt tightening or adjustment, greatly reducing construction difficulty and improving construction efficiency.

[0057] Furthermore, the top of the rotating handle 61 is pivotally connected to the U-shaped groove of the vertical pole 40 via a pivot, and its other end is provided with a spool for winding the threaded steel cable 64. When the rotating handle 61 is rotated to be parallel to the wall surface of the outer template 21, the threaded steel cable 64 is tensioned to complete the fastening of the inner and outer templates of the hollow cylinder 10.

[0058] Preferably, the upper wall of the rotating handle 61 is provided with a frustum-shaped cable hole 65, with its large-diameter end facing the pivot end (upper end) of the rotating handle 61. The cable 64 enters through the large-diameter opening of the frustum-shaped cable hole 65. During tensioning, the cable can slide freely in the direction of the small diameter; when the tension is released, the small-diameter opening will lock the cable and prevent it from returning, playing a one-way blocking and self-locking role to ensure that the tension will not loosen during the subsequent concrete pouring process.

[0059] In summary, in this embodiment, the coordinated action of the arc-shaped concave plate 22, the arc-shaped convex plate 32, and the vertical support 40 achieves uniform adhesion of the inner and outer templates of the hollow cylinder 10 and converts the tension force into a uniformly distributed load, effectively solving the technical problem of poor traditional linear fixing. Simultaneously, the synergistic effect of the threaded steel cable 64, the inner support sleeve 50, and the sliding support column 63 achieves bidirectional top-pull tightening of the inner and outer templates of the hollow cylinder 10, avoiding the eccentricity problem caused by the inability to fix the inner support in traditional core-pulling processes.

[0060] The threaded steel cable 64 is thinner than traditional screws, accommodating various rebar spacings without altering the rebar design, ensuring structural load-bearing performance. The rotating handle 61 facilitates quick and easy tensioning, and its parallel rotation direction to the wall surface avoids collisions in confined spaces, improving construction convenience. All components are reusable; the inner support sleeve 50 and threaded steel cable 64 can be flexibly removed after pouring, simplifying operation, increasing turnover rate, and significantly reducing construction costs.

[0061] A construction method for the concrete hollow cylinder flexible reinforcement device described in any of the above, the steps including:

[0062] S1. Install the outer formwork 21 and the inner formwork 31 of the hollow cylinder 10.

[0063] Specifically including: Position and install the inner and outer formworks according to the design drawings, ensuring that the verticality, roundness and concentricity of the inner and outer formworks meet the requirements; at the same time, the joints of the inner and outer formworks should be tight to prevent leakage of mortar. The outer formwork 21 and the inner formwork 31 can be selected from steel formworks or composite material formworks, which are convenient for subsequent removal.

[0064] S2. Connect the arc-shaped concave plate 22 and the arc-shaped convex plate 32 to the vertical立杆40 respectively to form an integral reinforcement unit, and install the unit to the designated positions on the outside of the outer formwork 21 and the inside of the inner formwork 31 respectively.

[0065] Specifically including: Fit the arc-shaped concave plate 22 to the outer formwork 21 and the arc-shaped convex plate 32 to the inner formwork 31, ensuring that their curved surfaces are consistent with the radian of the formwork; and fixedly connect the arc-shaped concave plate 22 and the arc-shaped convex plate 32 to the vertical立杆40 through the orientation fixture 23. The vertical立杆40 should be perpendicular to the ground to ensure overall stability; and the U-shaped groove of the vertical立杆40 should face outward to facilitate the subsequent installation of the adjustment component.

[0066] S3. Install the rotary handle 61 on one side of the outer formwork 21, and install the support fixture 62 and the sliding pillar 63 on one side of the inner formwork 31.

[0067] Specifically including: The rotary handle 61 is connected to the vertical立杆40 installed on one side of the outer formwork 21 through a rotating shaft, ensuring that it can rotate freely; the support fixture 62 is installed on the vertical立杆40 on one side of the inner formwork 31, and the sliding pillar 63 is slidably matched with the support fixture 62. The initial state of the support fixture 62 is a contracted state; check whether each moving part is flexible and there is no jamming phenomenon.

[0068] S4. Place the inner support sleeve 50 in the interior of the hollow cylinder 10 according to a predetermined "meter" - shaped layout, and sequentially pass the wire-passing steel cable 64 through the rotary handle 61, the inner support sleeve 50 and the support fixture 62.

[0069] Specifically including: Arrange the inner support sleeves 50 of each layer in a "meter" - shaped layout, and the extension lines of each layer of sleeves should intersect at the center of the inner formwork 31 (i.e., the hollow cylinder 10); the wire-passing steel cable 64 is inserted from one side of the rotary handle 61 and sequentially passes through the inner support sleeve 50 and the support fixture 62, ensuring that the wire-passing steel cable 64 is not entangled; after the wire-passing steel cable 64 passes through the support fixture 62, a certain length is reserved for subsequent connection to the sliding pillar 63.

[0070] S5. Connect one end of the threaded steel cable 64 to the rotating handle 61 in a movable manner, and the other end to the sliding support 63 in a fixed manner.

[0071] Specifically, this includes: one end of the threaded steel cable 64 is wound around the spool of the rotating handle 61 and introduced through the frustum-shaped threading hole 65 to ensure the one-way locking function is effective; the other end is fixedly connected to the sliding support 63, and the connection point should be firm and reliable to prevent slippage; check whether the tensioning path of the threaded steel cable 64 is smooth and unobstructed.

[0072] S6. Press down and rotate the tensioning steel cable 64 to drive the sliding support 63 to move, thereby widening the opening of the support clamp 62 until it is pressed against the inner template 31. Check the concentricity of the inner and outer templates to ensure that there are no errors.

[0073] Specifically, this includes: pressing down the rotating handle 61 to gradually align it with the outer template 21, while simultaneously driving the manual turntable 66 to tighten the steel cable; during the tensioning process, the sliding support 63 moves towards the opening of the support clamp 62, forcing the support clamp 62 to expand and press against the inner template 31; after tensioning to the set tension, the rotating handle 61 becomes parallel to the wall of the outer template 21, and the frustum-shaped cable threading hole 65 automatically locks the steel cable to prevent rebound; and checking whether the inner and outer templates are concentric to ensure there is no eccentricity.

[0074] S7. After securing the outer formwork 21 and the inner formwork 31, pour concrete.

[0075] Specifically, this includes: checking the stability and concentricity of the inner and outer formwork again before pouring; pouring concrete in layers to avoid excessive pouring at once, which could cause formwork deformation; and avoiding direct impact on the inner support sleeve 50 or the threaded steel cable 64 during the pouring process to prevent loosening.

[0076] S8. After the concrete has initially set, loosen the rotating handle 61 to release the tension of the threaded steel cable 64, allowing the support clamp 62 to retract and loosen, and then remove the inner template 31 assembly.

[0077] Specifically, this includes: after the concrete reaches its initial setting strength, loosening the rotating handle 61, driving the manual turntable 66 in the opposite direction to release the tension of the steel cable; the sliding support 63 retracts, the opening of the support clamp 62 narrows, and the inner template 31 loosens; removing the inner template assembly 30, taking care to avoid damaging the concrete surface.

[0078] S9. Pull out the threading steel cable 64 and the inner support sleeve 50, and remove the outer formwork 21.

[0079] Specifically, it includes: pulling out the wire-pulling steel cable 64 from the inner support sleeve 50. If the wire-pulling steel cable 64 is bonded to the concrete, gentle tapping and vibration can be used to assist in pulling it out. The inner support sleeves 50 can be pulled out one by one. If they are designed for permanent embedding, there is no need to remove them. Finally, the outer formwork 21 is removed, the surface of the formwork is cleaned, and the quality of the formed concrete is inspected. All reusable components are sorted and archived for easy reuse in the next turnover.

[0080] A flexible reinforcing device and construction method for concrete hollow cylinders designed in this application can significantly improve construction safety and environmental adaptability. By using flexible tensioning to replace traditional rigid connections, it effectively avoids problems such as the limitation of steel bar spacing and internal collisions, without the need to change the original structural design. The combination of a uniquely designed arc-shaped fastening method and a "rice" - shaped support method can convert the linear concentrated force generated by flexible tensioning into a uniform load acting on the inner and outer formworks, greatly enhancing the stability of the formworks and fundamentally solving the problem of core mold eccentricity. The device supports the non-destructive disassembly and reuse of each component. In particular, the wire-pulling steel cable can be easily pulled out from the inner support sleeve, enabling multiple turnovers. The operation is simple and the cost is low, ensuring no disturbance during the concrete pouring process and guaranteeing the quality of the formwork components and the overall structural accuracy.

[0081] The above has elaborated on the embodiments of this application in detail. The content described is only the preferred embodiments of this application and cannot be considered as limiting the scope of implementation of this application. Any equal changes and improvements made within the scope of this application should still fall within the patent coverage scope of this application.

Claims

1. A flexible reinforcement device for hollow concrete cylinders, used for reinforcing the inner and outer formwork of hollow cylinders, characterized in that, Comprising: An outer template assembly, including a plurality of arc-shaped concave plates for fitting the outer template of the hollow cylinder; the arc-shaped concave plates form a plurality of layers of annular radial fastening forces along the height of the outer template assembly; An inner template assembly, including a plurality of arc-shaped convex plates for fitting the inner template of the hollow cylinder; the arc-shaped convex plates form a plurality of layers of annular radial supporting forces along the height of the inner template assembly; Vertical standpipes, arranged along the height of the hollow cylinder template, for connecting the arc-shaped concave plates and the arc-shaped convex plates in series, and converting the multi-layer radial fastening forces into uniformly distributed loads; Inner support sleeves, arranged inside the hollow cylinder template to horizontally support the outer template and the inner template; An adjusting assembly, including a rotating handle arranged on one side of the outer template assembly, a support clamp arranged on one side of the inner template assembly, a sliding strut connected to the support clamp, and a wire-pulling steel cable, One end of the wire-pulling steel cable is connected to the sliding strut, and the other end passes through the inner support sleeve and is movably connected to the rotating handle. Press down the rotating handle to make it rotate counterclockwise and finally parallel to the outer template wall to achieve the fastening of the hollow cylinder template.

2. The flexible reinforcement device for a hollow concrete cylinder according to claim 1, characterized in that, The side of the arc-shaped concave plate that fits the outer template is a curved surface structure, and a slot hole cooperating with the vertical standpipe is constructed on the side away from the outer template.

3. The flexible reinforcement device for a hollow concrete cylinder according to claim 2, characterized in that, The side of the arc-shaped convex plate that fits the inner template is also a curved surface structure, and the slot hole cooperating with the vertical standpipe is constructed on the side away from the inner template.

4. The flexible reinforcement device for a hollow concrete cylinder according to claim 3, characterized in that, A directional clamp for clamping its body is provided on each of the arc-shaped convex plates and the arc-shaped concave plates to fixedly clamp and cooperate with the vertical standpipe.

5. A flexible reinforcement device for a hollow concrete cylinder according to any one of claims 1-4, characterized in that, The sliding strut cooperates with the support clamp to pull the movable end of the wire-pulling steel cable, so as to drive the sliding strut connected to the fixed end of the wire-pulling steel cable to move, and then expand the opening of the support clamp to achieve the support and fixation of the inner template, or narrow the opening of the support clamp to achieve the loosening of the support for the inner template.

6. The flexible reinforcement device for a hollow concrete cylinder according to claim 5, characterized in that, The top end of the rotating handle is pivotally connected to the vertical standpipe through a rotating shaft, and a wire spool for winding the wire-pulling steel cable is provided at the other end; when the rotating handle rotates to be parallel to the outer template wall, the tensioning of the wire-pulling steel cable is realized to complete the fastening of the hollow cylinder template.

7. The flexible reinforcement device for a hollow concrete cylinder according to claim 6, characterized in that, A frustum-shaped wire-passing hole is provided on the rotating handle, and its large-diameter end is arranged towards the pivot end side of the rotating handle. The wire-pulling steel cable enters from the large-diameter opening of the frustum-shaped wire-passing hole, and the small-diameter opening of the frustum-shaped wire-passing hole can prevent it from returning when the movable end is tensioned, playing a one-way blocking role.

8. A flexible reinforcement device for hollow concrete cylinders according to claim 6 or 7, characterized in that, The vertical standpipe is a long rod with a cross-section of a U-shaped groove structure; the adjusting assembly is arranged in the U-shaped groove and is configured between adjacent two layers of the arc-shaped convex plates and the arc-shaped concave plates.

9. A flexible reinforcement device for hollow concrete cylinders according to claim 8, characterized in that, The extension lines of all the inner support sleeves intersect at the axis of the hollow cylinder, and all the inner support sleeves of each layer form a "cross" structure.

10. A construction method for a flexible reinforced concrete hollow cylinder device as described in any one of claims 1-9, characterized in that the steps include... Comprising: S1. Install the outer template and the inner template of the hollow cylinder; S2. Connect the arc-shaped concave plate and the arc-shaped convex plate to the vertical uprights respectively, and install them to the designated positions on the outside of the outer template and the inside of the inner template respectively. S3. Install the rotating handle on one side of the outer template, and install the support clamp and sliding column on one side of the inner template; S4. Place the inner support sleeve inside the hollow cylinder, and pass the wire cable through the rotating handle, the inner support sleeve and the support clamp in sequence. S5. Connect one end of the threaded steel cable to the rotating handle and the other end to the sliding support. S6. Tension the threaded steel cable to move the sliding support, widen the opening of the support clamp, and tighten the inner template. S7. After securing the outer and inner formwork, pour the concrete. S8. After the concrete has initially set, release the tension of the threaded steel cable and remove the inner formwork assembly. S9. Pull out the threaded steel cable and inner support sleeve, and remove the outer formwork.

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