A reinforcing device for a concrete structure

Abstract

The utility model relates to concrete structure technical field especially a kind of reinforcing device for concrete structure, including multiple steel moulds, the inner wall of steel mould is provided with transversely extended recess;Multiple link blocks, the link block is made of mutually perpendicular fixed first part and second part, the first part and the second part are used to block the gap formed in connecting place by the recess of the steel mould of adjacent two vertically arranged steel moulds. Utilize the transverse recess of steel mould inner wall and the link block with slot to constitute mechanical positioning system, so that hoop can be directly placed and clamped in the continuous track formed, fundamentally replace traditional point-by-point binding operation, greatly save labor and material. Meanwhile, by the cooperation of inserting positioning column and hole and the staggered arrangement of upper and lower formworks, a formwork with high overall stiffness is constructed, effectively resisting the lateral pressure of concrete. In addition, the sealing of the corner gap by the link block ensures that the pouring is free of slurry leakage and the molded size is accurate, thereby completing the reinforcement with high quality.

Description

Technical Field

[0001] This utility model relates to the field of concrete structure technology, and in particular to a reinforcement device for concrete structures. Background Technology

[0002] In the field of building structural reinforcement, strengthening existing concrete columns to improve their load-bearing capacity or seismic performance is a common requirement. Currently, a widely used traditional reinforcement method involves binding a reinforcing cage, consisting of ring-shaped and vertical reinforcing bars, around the existing concrete column. Steel formwork is then erected around the cage, and finally, new concrete is poured into the cavity between the formwork and the original column, forming a reinforcement layer encasing the original structure. The reinforcement effect of this method relies on the synergistic effect of the new and old concrete, as well as the constraint effect of the newly added reinforcing cage. The reinforcing cage typically requires a dense arrangement of multiple ring-shaped reinforcing bars (stirrups), which are securely connected to each vertical reinforcing bar at every intersection using wire binding or welding to ensure the integrity and stability of the cage.

[0003] However, the aforementioned existing technologies have a significant drawback: because the reinforcing cage relies on hundreds of tying points between a large number of densely distributed ring bars and vertical bars to maintain its structural shape, the amount of tying work during on-site construction is enormous and inefficient. This problem is particularly prominent in confined spaces and restricted indoor or underground environments. For example, when reinforcing densely packed concrete columns in the basement of high-rise buildings or existing factories, construction workers find it difficult to carry out efficient work around the columns. The manual tying of each tying point becomes extremely difficult and time-consuming, not only severely slowing down the project progress but also inevitably resulting in a large waste of wire and labor due to the excessive number of tying points, significantly reducing the economy and convenience of the entire reinforcement process. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is that: because the steel cage needs to rely on hundreds of tie points between a large number of densely distributed ring steel bars and vertical steel bars to maintain its structural shape, the amount of binding work during on-site construction is huge and the efficiency is low.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a reinforcement device for concrete structures, including multiple steel molds, the inner wall of which is provided with a transversely extending groove; multiple connecting blocks, the connecting blocks being composed of a first part and a second part that are fixed perpendicularly to each other, the first part and the second part being used to seal the gap formed at the connection of the grooves of two adjacent vertically arranged steel molds.

[0006] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: the upper surface of the steel mold is provided with a plurality of plug-in positioning posts, and the lower surface is provided with plug-in positioning holes corresponding to the position and number of the plug-in positioning posts.

[0007] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: multiple steel molds can be enclosed to form a multi-layer cylindrical structure, and adjacent layers of steel molds are connected by the insertion positioning column and the insertion positioning hole, and the joints of the upper and lower layers are staggered.

[0008] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: the insertion positioning hole on the lower surface of the single steel mold located on the upper layer can simultaneously engage with the insertion positioning post on the two adjacent vertically arranged steel molds on the lower layer.

[0009] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: the inner side of the connecting block is provided with a slot for clamping reinforcing bars.

[0010] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: the number of steel molds in the same layer is four, which can be enclosed to form a square cylindrical structure.

[0011] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: the cross-sectional shape of the groove is rectangular, trapezoidal or arc-shaped; and / or, the first part and the second part of the connecting block are integrally formed.

[0012] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: a plurality of grooves are arranged side by side on the inner surface of the steel mold, and the grooves penetrate the steel mold.

[0013] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model: the outer surface of the steel mold is provided with a plurality of vertical reinforcing ribs.

[0014] In a preferred embodiment of the reinforcement device for concrete structures described in this utility model, a steel cage is further included, which is sleeved and wrapped around the outside of the concrete column. The steel cage includes a plurality of vertical steel bars and stirrups, and the stirrups are sleeved on the outer wall of the vertical steel bars.

[0015] The advantages of this invention are as follows: Traditional methods require numerous tying points to secure the reinforcing cage, resulting in a massive workload. This invention utilizes the transverse grooves on the inner wall of the steel mold and the slots on the inner side of the connecting block to create a highly efficient mechanical positioning system. During construction, the annular stirrups do not need to be tied to each vertical reinforcing bar; instead, they are directly placed and constrained within the continuous annular track formed by the grooves and slots. This design fundamentally eliminates the tedious point-by-point tying process, making the fixing of the reinforcing cage simple and quick. Its advantages are particularly pronounced in space-constrained construction environments, significantly saving labor and materials (such as wire) and shortening the construction cycle.

[0016] This invention achieves rapid alignment and secure connection of upper and lower template layers through the interlocking positioning posts and holes on the upper and lower surfaces of the steel mold. Combined with the principle of staggered joint arrangement of upper and lower layers, the template layers are integrated into a high-rigidity integral cylindrical structure, effectively resisting the lateral pressure of concrete. Furthermore, the connecting block located at the corner, with its unique vertical structure, perfectly seals the gap at the intersection of adjacent steel mold grooves, while the one-piece molding manufacturing process ensures the robustness and durability of this sealing structure. These measures work together to prevent grout leakage during the pouring process, ensuring the density and dimensional accuracy of the reinforced concrete layer, ultimately forming a high-quality reinforced structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0018] Figure 1 This is a three-dimensional illustration of the present application. Figure 1 ;

[0019] Figure 2 This is a three-dimensional illustration of the present application. Figure 2 ;

[0020] Figure 3 This is a three-dimensional illustration of the present application. Figure 3 ;

[0021] Figure 4 This is a three-dimensional assembly diagram of this application;

[0022] Figure 5 This is a three-dimensional schematic diagram of the connecting block in this application.

[0023] In the picture:

[0024] 1. Steel mold; 11. Groove; 12. Insertion positioning post; 13. Insertion positioning hole; 14. Reinforcing rib;

[0025] 2. Connecting block; 21. Slot;

[0026] 3. Reinforcing cage; 31. Vertical reinforcing bars; 32. Stirrups. Detailed Implementation

[0027] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0029] Reference Figure 1-5 This embodiment provides a reinforcement device for concrete structures, including multiple steel molds 1, the inner wall of which is provided with a transversely extending groove 11; multiple connecting blocks 2, each connecting block 2 is composed of a first part and a second part that are fixed perpendicularly to each other, the first part and the second part are used to seal the gap formed at the connection of the groove 11 of two adjacent vertically arranged steel molds 1.

[0030] The reinforcement device mainly consists of two parts: multiple steel molds 1 and multiple dedicated connecting blocks 2. Each steel mold 1 has a transversely extending groove 11 pre-machined on its inner wall. The function of the groove 11 is to directly accommodate and position the annular stirrups 32 in the reinforcing cage 3 during construction. When the multiple steel molds 1 are assembled into a closed cylindrical structure (such as a square or rectangular tube), these grooves 11 at the same horizontal level together form a continuous annular track, providing natural circumferential positioning and support for the stirrups 32 without the need for extensive binding. The connecting block 2 is specially designed to consist of two mutually perpendicular and fixed parts, shaped like a right-angled "wedge". During construction, when two adjacent steel molds 1 are vertically spliced ​​to form a 90-degree angle, the groove 11 on its inner wall will be interrupted at this point, forming a gap. At this time, the connecting block 2 is inserted into this position, and its two mutually perpendicular parts can be inserted into and fill the ends of the grooves 11 of the adjacent steel molds 1, thus perfectly sealing this gap.

[0031] The combination of the groove 11 of the steel mold 1 and the right-angle connecting block 2 brings several significant technological advancements: First, it solves the sealing problem at the corners of the formwork. The connecting block 2 effectively prevents cement slurry from leaking from the notch in the groove 11 at the vertical joint of adjacent steel mold 1 during concrete pouring, ensuring molding quality. Second, it provides an efficient and reliable mechanical positioning for the reinforcing cage 3, especially the stirrups 32. Construction workers no longer need to perform tedious binding at the intersection of the stirrups 32 and each vertical reinforcing bar 31; they only need to place the stirrups 32 into the continuous ring support track formed by the groove 11 of the steel mold 1 and the connecting block 2 to achieve accurate positioning and fixation. This greatly reduces the amount of on-site binding work, saving a significant amount of time and materials (such as wire), making it particularly suitable for efficient operation in space-constrained construction environments. In summary, this device, through the structural cooperation of the steel mold 1 and the connecting block 2, achieves a dual improvement in construction efficiency and project quality.

[0032] The upper surface of the steel mold 1 is provided with multiple insertion positioning posts 12, and the lower surface is provided with insertion positioning holes 13 corresponding to the position and number of insertion positioning posts 12. This design allows the insertion positioning holes 13 on the lower surface of the upper steel mold 1 to be precisely fitted onto the insertion positioning posts 12 on the upper surface of the lower steel mold 1, like a "lock".

[0033] This interlocking connection plays a crucial guiding and constraining role: First, it enables rapid and precise positioning: construction workers can quickly align the upper and lower steel formwork 1 without the need for complex measuring tools, simply by using the interlocking positioning posts 12 and the holes, greatly improving installation efficiency and effectively avoiding misalignment problems that may occur with manual alignment. Second, it significantly enhances overall stability: when the upper and lower steel formwork 1 are connected through the interlocking structure, they are effectively constrained in the horizontal direction (i.e., in-plane direction of the formwork), preventing relative slippage that may occur under the lateral pressure of concrete. This allows the entire formwork cylinder formed by stacking multiple steel formwork 1 pieces to work collaboratively as a whole, greatly improving structural rigidity and deformation resistance. Finally, this interlocking connection, combined with the aforementioned staggered joint arrangement principle, constitutes a simple and reliable three-dimensional connection, ensuring construction safety and molding quality. In actual manufacturing, the cross-sections of these interlocking positioning posts 12 and holes can be designed as circles, rectangles, or other suitable geometric shapes to balance processing convenience and connection strength.

[0034] To meet the reinforcement needs of concrete structures of varying heights, the reinforcement device of this invention is designed as a multi-layered structure that can be vertically stacked. Multiple steel molds 1 are first assembled horizontally to form a closed, annular, single-layered structure. When an increase in height is required, a multi-layered cylindrical formwork system is constructed by stacking new steel molds 1 on top.

[0035] The connection between the upper and lower steel formwork 1 is achieved through the precise fit between the insertion positioning posts 12 and the insertion positioning holes 13 located on their contact surfaces. When installing the upper steel formwork 1, the operator aligns the insertion positioning holes 13 on its lower surface with the corresponding insertion positioning posts 12 on the upper surface of the lower steel formwork 1, and then places it downwards. This insertion fit not only provides clear guidance for the installation process and achieves rapid and accurate positioning, but also forms an effective mechanical interlock at the vertical connection, significantly enhancing the overall rigidity and stability of the entire formwork when subjected to the lateral pressure of concrete.

[0036] Crucially, during the overlapping installation process, the horizontal joints between adjacent layers must be staggered. This means that the joints of the upper steel formwork 1 cannot be on the same vertical line as the joints of the lower steel formwork 1. This design principle, drawing on the mature masonry engineering concept of "staggered joints," effectively distributes localized stress to adjacent formwork, preventing stress concentration at vertical joints. From a structural perspective, this staggered arrangement tightly integrates the originally independent formwork layers into a unified whole, significantly improving the bending and torsional resistance of the formwork cylinder. From a construction quality perspective, it effectively eliminates the common problem of grout leakage that may occur due to vertically aligned joints, ensuring the pouring quality and uniformity of the reinforced concrete layer. In summary, this structural design combining "vertical interlocking" and "horizontal staggering" constitutes a simple, reliable, and efficient three-dimensional formwork, a core guarantee for achieving rapid and high-quality construction.

[0037] The single steel mold 1 located on the upper layer has an insertion positioning hole 13 on its lower surface that can simultaneously engage with the insertion positioning post 12 on the two adjacent vertically arranged steel molds 1 on the lower layer.

[0038] During installation, a specific insertion positioning hole 13 on the lower surface of the upper single steel mold 1 is designed to simultaneously engage with the insertion positioning posts 12 on the upper surfaces of two adjacent steel molds 1 arranged perpendicularly to each other in the lower layer (i.e., two steel molds 1 forming a corner). This design ensures that when the upper steel mold 1 is lowered, its weight and position are shared and constrained by the two adjacent steel molds 1 arranged perpendicularly to each other in the lower layer through this insertion positioning hole 13. This is equivalent to setting up a natural "three-dimensional positioning lock" at every critical corner connection. From a structural mechanics perspective, this connection method firmly "anchors" the upper formwork to the two mutually perpendicular components in the lower layer, greatly limiting the displacement tendency of the upper formwork in any horizontal direction. This significantly enhances the integrity and structural robustness of the entire formwork system under complex loads and effectively prevents misalignment or deformation that may occur under the impact of concrete pouring. From a construction operation perspective, this design allows workers to align and lock with the adjacent templates in two directions below simultaneously through a simple falling motion when performing staggered assembly.

[0039] On the inner side of the connecting block 2, that is, the side facing the concrete structure and the reinforcing cage 3 after it is installed in place, a slot 21 for securing the reinforcing bars is specially provided. The design of the slot 21 has a clear and beneficial technical purpose: (1) to provide precise radial and circumferential positioning: when the annular stirrup 32 of the reinforcing cage 3 is placed in the annular track formed by the groove 11 of the inner wall of the steel mold 1 and the connecting block 2, the corner part of the stirrup 32 will fall into the slot 21. The slot 21 effectively wraps and restrains the stirrup 32 from both sides and the bottom, thereby precisely restricting the stirrup 32 to the designed plane position and elevation. This prevents the stirrup 32 from shifting or rotating due to accidental collision or concrete flow impact before or during the pouring of concrete, ensuring the accuracy of the geometric dimensions of the reinforcing cage 3. (2) to enhance local stability and integrity: in the critical area of ​​construction stress, that is, at the vertical corner of the formwork system, the slot 21 provides an additional mechanical gripping point. It locally fixes the corner of the stirrup 32 to the formwork system itself (through the connecting block 2), which not only enhances the local stability of the steel cage 3 itself, but also establishes a closer connection between the stirrup 32 and the formwork system, forming a more stable force system. (3) Further improve the convenience of construction: This slot 21 provides construction personnel with a tactile and visual alignment guide. When installing the stirrup 32, the operator can clearly press the corner of the stirrup 32 into the slot 21 as a confirmation signal of "in place", which simplifies the installation process and further improves the construction efficiency and accuracy. In summary, the slot 21 set on the inner side of the connecting block 2 realizes a passive and efficient mechanical positioning. Together with the transverse groove 11 of the steel mold 1, it forms a complete and multi-dimensional steel reinforcement positioning system, which significantly improves the installation quality of the steel cage 3 and the reliability of the overall structure without adding any additional operation steps.

[0040] The preferred number of steel molds 1 constituting the same layer is four. These four steel molds 1 are connected sequentially along their edges in the horizontal direction, forming a regular square cylindrical structure. This design choice is based on the following considerations: First, square or rectangular cross-sections are one of the most common structural forms of concrete columns in buildings, and the scheme of using four steel molds 1 to enclose a square tube has strong engineering applicability and a wide range of adaptability. Second, the configuration of the four molds is structurally stable and symmetrical, and can evenly bear and transmit the lateral pressure generated during concrete pouring. From a manufacturing and construction perspective, this scheme achieves a high degree of standardization. All steel molds 1 can be manufactured to uniform specifications, greatly simplifying the production, storage management, and on-site identification and retrieval process. During assembly, construction workers only need to vertically connect the four steel molds 1 end to end in sequence to quickly complete the single-layer closure. The operation logic is clear and simple, effectively avoiding errors that may be caused by complex assembly, and significantly improving construction efficiency and economy.

[0041] In a preferred embodiment of this invention, the transverse grooves 11 on the inner wall of the steel mold 1 are not single, but multiple grooves arranged in parallel along the vertical direction. These grooves 11 completely penetrate the entire length of the steel mold 1, forming a continuous channel. This design allows a single steel mold 1 to adapt to and position multiple annular stirrups 32 at different heights in the reinforcing cage 3, thereby greatly enhancing the versatility and adaptability of the device, eliminating the need to prepare steel molds 1 of different specifications for designs with different stirrup spacings.

[0042] Regarding the cross-sectional shape of the groove 11, several optimization options are provided: A rectangular cross-section is the simplest to process, has a regular support surface, and is easy to standardize for production. A trapezoidal cross-section, with its slightly tapered design, creates a "dovetail" effect, which can more effectively accommodate and confine the stirrups 32, especially under vibration, reducing the risk of the stirrups 32 detaching from the groove. This shape also helps to disperse stress and avoid stress concentration at sharp corners. An arc-shaped cross-section, with its inner wall shape more closely conforming to the outline of a common circular steel bar, provides a larger contact area, resulting in more uniform stress distribution and more stable positioning of the stirrups 32.

[0043] Regarding the manufacturing process of connecting block 2: For connecting block 2, which consists of two mutually perpendicular parts and adopts an integral molding structure, this means that the two perpendicular parts of connecting block 2 are made from the same piece of material through casting, forging or integral machining, etc., to form a complete and indivisible integral component.

[0044] The one-piece molding structure offers significant technical advantages: it completely eliminates the need to connect the two parts (such as by welding or bolting), thus avoiding the risk of weak points in the structure due to connection points. This results in higher overall strength and rigidity for the connecting block 2, enabling it to withstand the compression and impact of concrete more reliably. Without internal stress and welding defects, its service life and reliability far exceed those of assembled structures, ensuring the stable performance of this key component under repeated use. The one-piece molding process is suitable for mass production, offering high efficiency, good product consistency, and easier quality control. In summary, the optimized selection of the cross-sectional shape of the groove 11 and the adoption of the one-piece molding process for the connecting block 2 together improve the reliability, applicability, and economy of this utility model's reinforcement device from a detailed perspective.

[0045] To further enhance the structural rigidity and optimize the stress performance of the steel mold 1, multiple vertically extending reinforcing ribs 14 are provided on the outer surface of the steel mold 1. These vertical reinforcing ribs 14 act like a "skeleton" attached to the back of the steel mold 1, effectively improving the bending and deformation resistance of the steel mold 1. During concrete pouring, the formwork will bear enormous fluid lateral pressure, and the reinforcing ribs 14 can effectively disperse and transmit this pressure, significantly suppressing the possible bulging deformation of the steel mold 1 surface, ensuring the uniform thickness of the reinforced layer, and guaranteeing construction accuracy and molding quality. Secondly, from the perspective of the overall structure, these external vertical reinforcing ribs 14, together with the transverse grooves 11 on the inner wall of the steel mold 1 and the interlocking positioning structures on the upper and lower surfaces, form a spatial stress system. This not only enhances the rigidity of a single steel mold 1, but when multiple steel molds 1 are connected by the interlocking structure to form a multi-layer cylindrical structure, these reinforcing ribs 14 further enhance the overall stability of the entire formwork system, enabling it to work collaboratively, like a unified reinforcing sleeve. Furthermore, considering both economy and durability, by incorporating reinforcing ribs 14, the load-bearing capacity of the steel mold 1 can be significantly improved without substantially increasing the thickness of the steel plate. This allows the steel mold 1 of this invention to be manufactured using relatively thinner materials, achieving both material lightweighting and performance enhancement, saving manufacturing costs, while ensuring its ability to withstand repeated disassembly and use, thus extending its service life.

[0046] It also includes a reinforcing cage 3 that wraps around the outside of the concrete column. This reinforcing cage 3 consists of two main reinforcing steel components: one is a number of vertically parallel reinforcing bars 31, which are evenly distributed around the old column; the other is a ring-shaped stirrup 32, which is horizontally wrapped around all the vertical reinforcing bars 31. The installation and positioning of the stirrup 32 does not rely on the traditional and cumbersome method of binding all of them. Instead, during construction, the stirrup 32 is placed directly into the transverse grooves 11 pre-set on the inner wall of the steel formwork 1. These grooves 11 provide a natural and continuous ring-shaped support track for the stirrup 32. At the same time, at the corners of the formwork, the special slots 21 on the inner side of the connecting block 2 can accurately lock the curved corners of the stirrup 32. This mechanical positioning system allows the stirrup 32 to remain stable during concrete pouring with only auxiliary fixing to the vertical reinforcing bars 31 at a few key nodes. This greatly reduces the workload of on-site binding operations, significantly improves construction efficiency, and fundamentally solves the problem of material and labor waste caused by too many binding points, achieving the goal of efficient and economical reinforcement.

[0047] Reference Figure 1-5 A workflow for a reinforcement device for concrete structures.

[0048] Step 1: On-site preparation and component placement.

[0049] First, the laitance and loose particles on the surface of the old concrete column to be reinforced are cleaned to ensure that its exposed structure is firm and flat. Then, the components of this application, including multiple standardized steel molds 1, multiple dedicated connecting blocks 2, and pre-prepared vertical reinforcing bars 31 and ring stirrups 32, are transported to the construction area and placed in an orderly manner for installation.

[0050] Step 2: Assemble the reinforcing steel cage 3.

[0051] Several vertical reinforcing bars 31 are arranged around the old concrete column, roughly parallel and evenly spaced. Next, annular stirrups 32 are fitted over the outside of these vertical reinforcing bars 31 from top to bottom or bottom to top. A key improvement of this invention is that it eliminates the need to tie or weld the stirrups 32 to every intersection with each vertical reinforcing bar 31. Operators only need to temporarily fix the stirrups 32 at a few key locations (e.g., every few vertical reinforcing bars 31 or at selected stress points) to initially stabilize the cage shape. At this point, a relatively "loose" but regularly shaped reinforcing cage 3 has been initially formed.

[0052] Step 3: Enclosing and positioning the single-layer steel mold 1.

[0053] Four steel molds 1 are taken and connected end to end in a clockwise or counterclockwise direction to form the first layer (bottom layer) template. When enclosing, adjacent steel molds 1 abut against each other at a perpendicular angle: that is, the end face of one steel mold 1 abuts against the inner wall of the adjacent steel mold 1. During this process, it is necessary to ensure that the transverse grooves 11 opened on the inner wall of all steel molds 1 are at the same horizontal height, and that these grooves 11 are exactly aligned with and accommodate a certain annular stirrup 32 installed in the second step. The transverse groove 11 acts as an "invisible positioning slot 21", which precisely restricts the stirrup 32 to the designed position, thereby eliminating a lot of tedious tying work.

[0054] Step 4: The staggered stacking and overall locking of the multi-layer steel mold 1.

[0055] After completing the installation of the first layer of steel formwork 1, the installation of the second layer of steel formwork 1 begins. The installation of the second layer of steel formwork 1 follows the principle of staggered alignment, meaning that the joints of the upper layer of steel formwork 1 must not be aligned with the joints of the lower layer of steel formwork 1. Specifically, the insertion positioning holes 13 on the lower surface of each steel formwork 1 in the second layer are aligned with the insertion positioning posts 12 on the upper surface of the corresponding steel formwork 1 in the lower layer, and then inserted. Particularly important is that for a steel formwork 1 located at the corner of the upper layer, the two insertion positioning holes 13 on its lower surface must simultaneously be inserted with the insertion positioning posts 12 of the two adjacent vertical steel formwork 1s in the lower layer (i.e., the post on the upper surface of the end of one steel formwork 1 and the post on the upper surface of the side edge of the other steel formwork 1). This design achieves interlocking between the upper and lower layers and effectively transfers the load, significantly enhancing the overall rigidity and stability of the entire formwork system. This process is repeated until all layers of steel formwork 1 are installed.

[0056] Step 5: Install connecting block 2 and achieve double sealing and positioning.

[0057] At each corner where the steel mold 1 vertically abuts, a connecting block 2 is inserted into the intersection of the transverse grooves 11 of two adjacent steel mold 1s. The connecting block 2 consists of two vertically connected parts, whose cross-sectional shape is identical to that of the transverse groove 11. When the connecting block 2 is inserted, its two parts precisely seal the vertical gap created by the vertical abutment of adjacent steel mold 1s at the corner, effectively preventing cement slurry leakage during concrete pouring and providing a sealing function. A slot 21 is provided on the inner side of the connecting block 2 (i.e., the side facing the concrete column). When the corner portion of the stirrup 32 is located in this position, it can be inserted into the slot 21. This design further strengthens the radial and axial restraint of the stirrup 32, especially at critical stress corners, ensuring that the reinforcing cage 3 will not shift under pouring impact, thus providing an auxiliary positioning function.

[0058] Step 6: Pouring concrete and subsequent formwork removal.

[0059] After all steel formwork 1 and connecting blocks 2 are installed in place, forming a sealed and stable casting cavity, freshly mixed concrete can be poured into the cavity. The concrete is poured from the top of the formwork, filling all the space between the reinforcing cage 3 and the old column. After the concrete has fully cured and reached its design strength, the steel formwork 1 and connecting blocks 2 are disassembled in the reverse order of installation. All disassembled components can be reused, resulting in significant economic benefits.

[0060] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A reinforcement device for concrete structures, characterized in that: It includes multiple steel molds (1), and the inner wall of the steel mold (1) is provided with a transversely extending groove (11). Multiple connecting blocks (2), each connecting block (2) is composed of a first part and a second part that are fixed perpendicularly to each other. The first part and the second part are used to seal the gap formed at the connection of the groove (11) of two adjacent vertically arranged steel molds (1).

2. The reinforcement device for concrete structures according to claim 1, characterized in that: The upper surface of the steel mold (1) is provided with a plurality of plug-in positioning posts (12), and the lower surface is provided with plug-in positioning holes (13) corresponding to the position and number of the plug-in positioning posts (12).

3. The reinforcement device for concrete structures according to claim 2, characterized in that: Multiple steel molds (1) can be enclosed to form a multi-layer cylindrical structure, and adjacent steel molds (1) are connected by the insertion positioning post (12) and the insertion positioning hole (13), and the upper and lower layer seams are staggered.

4. The reinforcement device for concrete structures according to claim 3, characterized in that: The single steel mold (1) located on the upper layer has an insertion positioning hole (13) on its lower surface that can simultaneously engage with the insertion positioning pins (12) on the two adjacent steel molds (1) arranged vertically on the lower layer.

5. The reinforcement device for concrete structures according to claim 1, characterized in that: The inner side of the connecting block (2) is provided with a slot (21) for clamping the reinforcing bars.

6. The reinforcement device for concrete structures according to claim 1, characterized in that: The number of steel molds (1) in the same layer is four, which can be enclosed to form a square cylindrical structure.

7. The reinforcement device for concrete structures according to claim 1, characterized in that: The cross-sectional shape of the groove (11) is rectangular, trapezoidal or arc-shaped; and / or, the first part and the second part of the connecting block (2) are integrally formed.

8. The reinforcement device for concrete structures according to claim 1, characterized in that: The inner surface of the steel mold (1) is provided with a plurality of grooves (11) arranged in parallel, and the grooves (11) penetrate the steel mold (1).

9. The reinforcement device for concrete structures according to claim 1, characterized in that: The outer surface of the steel mold (1) is provided with multiple vertical reinforcing ribs (14).

10. The reinforcement device for concrete structures according to claim 1, characterized in that: It also includes a steel cage (3) that is wrapped around the outside of the concrete column. The steel cage (3) includes several vertical steel bars (31) and stirrups (32), which are wrapped around the outer wall of the vertical steel bars (31).

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