A reinforcing column hoop for a frame column special-shaped section and a reinforcing construction method

Abstract

The application discloses a kind of for frame column special-shaped section auxiliary reinforcing column hoop and reinforcing construction method, belong to building construction technical field, the reinforcing column hoop includes frame column tool type column hoop, 90 degrees right-angle integral rigid frame column special-shaped section auxiliary column hoop, special-shaped section auxiliary column hoop positioning lock catch pin and special-shaped section auxiliary column hoop positioning fastening wedge;The male angle of auxiliary column hoop is attached with the female angle of special-shaped section column formwork, beam is attached with column side formwork, after being fastened by positioning fastening wedge, it is connected with tool type column hoop by positioning lock catch pin again to form stressed whole, realize the stable transmission of special-shaped section formwork side pressure to main reinforcing system.The application is reasonable in stress transmission design, and strong in reinforcing stability, effectively guarantees the geometric dimension precision of cast-in-place structure, part processing is simple, and strong in universality, and construction operation is convenient, greatly improves construction efficiency, shortens construction period and reduces construction cost, and is suitable for the formwork reinforcing engineering of the special-shaped section of various frame columns.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a column hoop for auxiliary reinforcement of irregular cross-section frame columns and a reinforcement construction method using the column hoop. Background Technology

[0002] In modern construction engineering, to meet the requirements of architectural form and function, the application of irregular cross-section columns in frame structures is becoming increasingly widespread. Secondary structures such as frame columns attached to walls and piers are often designed and constructed simultaneously with the primary structure. Compared with traditional square and rectangular cross-section columns, the formwork support and reinforcement of irregular cross-section columns present significant technical challenges: the internal corners and irregular sides of irregular cross-sections are difficult to effectively fit and reinforce using conventional column hoops, making it easy for problems such as deformation of internal and external corners, warping of column surfaces, and displacement of formwork to occur during construction; moreover, existing reinforcement methods mostly involve temporary on-site fabrication of reinforcement components, resulting in chaotic force transmission and an inability to form a unified reinforcement system. This makes it difficult to guarantee the geometric dimensional accuracy of cast-in-place concrete structures, and has a particularly serious impact on the appearance of structures with high requirements for aesthetic quality, such as fair-faced concrete columns.

[0003] Meanwhile, the existing construction process for reinforcing irregularly shaped column formwork is cumbersome, requiring a significant investment of manpower and time for on-site processing and adjustments, resulting in low construction efficiency and difficulty in controlling the construction period. Furthermore, the temporary reinforcement components have poor versatility, and most cannot be reused after disassembly, leading to material waste and high construction costs. Currently, most of the column hoop-related structures disclosed in existing technologies are designed for rectangular and square cross-section columns. For example, the precast welded waterstop steel plate column hoop through-column structure disclosed in CN121429036A only solves the problem of welding and assembling the waterstop steel plate and column hoop, and cannot be applied to the formwork reinforcement of irregularly shaped columns, nor does it propose a targeted reinforcement construction method.

[0004] Therefore, developing a structurally sound, stable, and versatile auxiliary reinforcement column hoop for irregularly shaped frame columns, along with a standardized reinforcement construction method, to solve the industry problem of reinforcing irregularly shaped column formwork, improve construction efficiency, and reduce construction costs has become an urgent technical issue to be addressed in this field. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a method for auxiliary reinforcement of irregular cross-section column hoops and reinforcement construction for frame columns. It solves the technical problems of difficulty in reinforcing irregular cross-section column formwork, uneven stress distribution, easy deformation, low construction efficiency, and serious material waste in existing technologies. It achieves standardized and integrated reinforcement of irregular cross-section column formwork, ensures the geometric dimensional accuracy and appearance quality of cast-in-place structures, and improves construction efficiency, shortens the construction period, and reduces construction costs.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A column hoop for auxiliary reinforcement of irregular cross-section frame columns includes a tool-type column hoop for frame columns, an auxiliary column hoop for irregular cross-section frame columns, a positioning locking pin for the auxiliary column hoop for irregular cross-section frame columns, and a positioning and fastening wedge for the auxiliary column hoop for irregular cross-section frame columns. The structure and function of each component are as follows: Frame column tool-type column hoop: A standard reinforcement column hoop adapted to the construction of rectangular frame column formwork. It is made of conventional steel and serves as the main load-bearing component of the entire reinforcement system. It is used to achieve foundation reinforcement of the side formwork of the rectangular frame column. Its arrangement spacing is calculated and determined according to the cross-sectional dimensions of the frame column and the concrete pouring parameters.

[0007] Auxiliary column hoop for irregular cross-section frame columns: This is the core component of the invention. It is an integral rigid component formed by two side main beams through a one-piece molding or welding process, creating a 90-degree right angle. It has sufficient strength and rigidity to effectively withstand the lateral pressure during concrete pouring. The 90-degree external angle of this auxiliary column hoop precisely matches the internal angle contour of the irregular cross-section column formwork, and the horizontal beams on both sides of the right angle match the outer surface of the irregular cross-section column side formwork, achieving precise positioning and reinforcement of the irregular cross-section formwork. The steel profile of the side main beams is determined according to the actual dimensions of the irregular cross-section of the frame column, the concrete pouring height, and the calculated lateral pressure value, ensuring that its stress performance meets the engineering requirements.

[0008] Irregular cross-section auxiliary column hoop positioning and fastening wedge: Made of high-strength wood or metal wedges, it has good fastening performance and anti-deformation ability. It is mainly used in two aspects: First, to finally fasten the tool-type column hoop of the frame column to ensure the stability of the main reinforcement system; Second, to tightly fasten the irregular cross-section auxiliary column hoop of the frame column to the irregular cross-section column formwork, so as to achieve seamless fit between the auxiliary column hoop and the formwork. At the same time, it serves as a force transmission medium to transfer the lateral pressure borne by the auxiliary column hoop to the tool-type column hoop.

[0009] Irregular cross-section auxiliary column hoop positioning locking pin: Made of wear-resistant metal rod, with an anti-detachment structure at the end, used for vertical connection, positioning and locking between the tool-type column hoop and the irregular cross-section auxiliary column hoop of the frame column; through the connection of the positioning locking pin, the displacement of the auxiliary column hoop under the vibration of concrete pouring and the action of lateral pressure can be effectively limited, while making all tool-type column hoops and auxiliary column hoops form a continuous force-bearing whole, realizing the uniform transmission and dispersion of lateral pressure.

[0010] The reinforcement construction method of the irregular cross-section auxiliary reinforcement column hoop of the present invention includes the following specific steps: Step 1: Reinforcement of Rectangular Frame Column Formwork Foundation. The side formwork of the rectangular frame columns is closed according to design requirements. Based on the previously calculated column hoop spacing, temporary fastening of the rectangular formwork is achieved using frame column tool-type column hoops. The deviation between the actual installation spacing and the design spacing of the column hoops is controlled within ±5mm. A vertical line is hung on the side of the column for vertical alignment, adjusting the vertical error of the formwork to ≤3mm / 2m, meeting the requirements of building construction specifications. After adjustment, each frame column tool-type column hoop is fully tightened using irregularly shaped cross-section auxiliary column hoop positioning and tightening wedges to ensure the structural stability of the main reinforcement system, laying the foundation for subsequent reinforcement of irregularly shaped cross-section formwork.

[0011] Step 2: Auxiliary Reinforcement of Irregular Section Column Formwork. Install auxiliary column hoops for irregular sections at the corresponding positions of the already tightened tool-type column hoops for each frame column. Before installation, check the flatness of the inside corners and side surfaces of the irregular section column formwork. If the flatness deviation is greater than 2mm, use a special leveling component for leveling to ensure the fit between the auxiliary column hoop and the formwork. During installation, ensure that the 90-degree outside corner of the auxiliary column hoop fits tightly with the inside corner of the irregular section column formwork, and that the crossbeams on both sides of the right angle fit tightly with the outer surface of the side formwork of the irregular section column. Then, use the positioning and tightening wedges of the auxiliary column hoop to secure the auxiliary column hoop to the formwork as a whole, achieving precise positioning and reinforcement of the irregular section formwork and effectively avoiding deformation of the inside and outside corners and warping of the column surface.

[0012] Step 3: The integral forming of the load-bearing structure uses irregular cross-section auxiliary column hoops for positioning and locking. The adjacent irregular cross-section auxiliary column hoops of the frame columns are connected, positioned, and locked to the tool-type column hoops of the frame columns. The installation spacing of the positioning and locking pins is consistent with the spacing of the column hoops. After the locking pins are inserted into the corresponding connection holes of the tool-type column hoops and auxiliary column hoops, they are fixed with anti-loosening clips or anti-loosening nuts to prevent the locking pins from falling off due to vibration during concrete pouring. Through the connection of the positioning and locking pins, all the tool-type column hoops and the irregular cross-section auxiliary column hoops of the frame columns form a continuous integral reinforcement system, achieving uniform transmission and dispersion of the lateral pressure of the irregular cross-section formwork to the main reinforcement system, ensuring the rationality of the stress distribution of the entire reinforcement system.

[0013] Step 4: Demolding and Component Recycling After the concrete pouring is completed, cure it to the demolding strength specified in the design. When demolding, follow the order of first removing the positioning locking pins, then removing the positioning fastening wedges, and finally removing the auxiliary column hoops of the irregular cross-section of the frame column and the tool-type column hoops of the frame column. Avoid forcibly dismantling to prevent damage to the formwork or column hoops. After the dismantled components are cleaned of surface concrete residue and the structural integrity is tested, they can be reused in the reinforcement construction of the frame column formwork in subsequent projects to achieve material recycling.

[0014] Compared with the prior art, the present invention has the following significant advantages: 1. This invention designs a 90-degree right-angle integral rigid auxiliary column hoop with an irregular cross-section. By cooperating with positioning and fastening wedges and positioning locking pins with conventional tool-type column hoops, a reinforcement system combining main and auxiliary components and integrated force bearing is formed, which specifically solves the industry problem of reinforcing irregular cross-section column formwork. The auxiliary column hoop fits precisely with the irregular cross-section formwork, and the lateral pressure is evenly transferred to the main force-bearing tool-type column hoop through the positioning and fastening wedges. The force transmission design is reasonable, effectively avoiding problems such as deformation of internal and external corners, warping of column surface, and displacement of formwork, ensuring the geometric dimensional accuracy of cast-in-place structures, and greatly improving the appearance forming quality of structures such as fair-faced columns.

[0015] 2. The structural design of each column hoop component of the present invention is standardized, the processing and manufacturing are simple, the selection of steel material can be flexibly adjusted according to the actual parameters of the project, and it has strong versatility. It is suitable for formwork reinforcement projects of various frame columns with irregular cross sections, and solves the problem of poor versatility of existing temporary reinforcement components.

[0016] 3. This invention is equipped with a standardized and streamlined reinforcement construction method, which clarifies the operation requirements, precision control standards and demolding sequence of each step. The construction operation is convenient, requires no complicated construction equipment, and is easy for construction personnel to master. Compared with traditional reinforcement methods, the construction efficiency is increased by more than 30%, the construction period of a single frame column is greatly shortened, and the labor cost is significantly reduced.

[0017] 4. All components of this invention are tool-type designs, which can be reused after simple cleaning and testing after disassembly, realizing the recycling of materials, effectively reducing material waste, reducing the overall construction cost by more than 20%, and having good economic benefits.

[0018] 5. After installation, the reinforcement system of the present invention forms a continuous integral structure with strong stability. There are no loosening or deformation problems during concrete pouring, and the construction safety is high. Moreover, the entire construction process does not require a large amount of on-site welding and processing, making the construction environment cleaner and meeting the industry requirements for green construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation and reinforcement of auxiliary column hoops for irregular cross-section frame columns according to the present invention; Figure 2 for Figure 1 Elevation drawing; Figure 3 This is a schematic diagram of the combined structure of the frame column tool-type column hoop and the irregular cross-section auxiliary column hoop of the present invention.

[0020] In the diagram: 1-Frame column tool-type column hoop, 2-Frame column irregular section auxiliary column hoop, 3-Irregular section auxiliary column hoop positioning lock pin, 4-Irregular section auxiliary column hoop positioning fastening wedge, 5-Rectangular frame column template, 6-Irregular section column template, 7-Anti-loosening nut, 8-Rectangular frame column body, 9-Irregular section wall-attached column body. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific engineering embodiments.

[0022] Example 1 Please see now Figure 1-3 This invention demonstrates the overall installation and reinforcement state of the reinforcing column clamp on a frame column, clearly showing the mating positions of the rectangular frame column template 5, the irregular cross-section column template 6, the tool-type column clamp 1, and the auxiliary column clamp 2. It also shows the installation positions of the positioning locking pin 3, the positioning fastening wedge 4, and the anti-loosening nut 7, intuitively reflecting the structural layout of the entire integrated reinforcement system and its mating relationship with the frame column body. The combined structure and detailed schematic diagram of the tool-type column clamp 1 and the auxiliary column clamp 2 demonstrate the 90-degree right-angle structural feature of the auxiliary column clamp 2, the connection method between the tool-type column clamp 1 and the auxiliary column clamp 2, and the mating structure of the positioning locking pin 3 and the anti-loosening nut 7, reflecting the rationality of the structural design and the scientific nature of the force transmission in the reinforcement system of this invention. The present invention relates to a frame column auxiliary reinforcement hoop with irregular cross-section, comprising a frame column tool-type hoop, a frame column auxiliary hoop with irregular cross-section, an auxiliary hoop positioning lock pin, and an auxiliary hoop positioning and fastening wedge. The auxiliary hoop with irregular cross-section is a 90-degree right-angle integral rigid component formed by integral molding or welding of two side main beams, possessing the strength and rigidity to withstand the lateral pressure of concrete pouring. Its 90-degree external angle adapts to the internal angle contour of the irregular cross-section column template, and the horizontal beams on both sides of the right angle adapt to the contact surface of the irregular cross-section column side template. The auxiliary hoop positioning and fastening wedge is used for the overall fastening of the frame column tool-type hoop and the contact fastening of the auxiliary hoop with the irregular cross-section column template. The auxiliary hoop positioning lock pin is used for the upper and lower connection, positioning, and locking of the frame column tool-type hoop and the auxiliary hoop with irregular cross-section, limiting the displacement of the auxiliary hoop and making the two form a whole under stress. The frame column tool-type column hoop is a standard reinforcing column hoop adapted to rectangular frame column formwork. As the main load-bearing component of the entire reinforcement system, the lateral pressure of concrete pouring borne by the auxiliary column hoop with irregular cross-section of the frame column is evenly transferred to the frame column tool-type column hoop through the positioning and fastening wedges. The side main beam of the auxiliary column hoop with irregular cross-section of the frame column is made of steel profile, and the type of steel profile is determined according to the actual size of the irregular cross-section of the frame column, the concrete pouring height, and the calculated value of the lateral pressure. The positioning locking pin is made of wear-resistant metal rod, and the positioning and fastening wedge is made of high-strength wooden or metal wedge blocks.

[0023] Example 2 In this embodiment, the auxiliary reinforcement method for irregular cross-section frame columns and the reinforcement construction method of the present invention are applied to the formwork reinforcement construction of frame columns in a commercial complex project. In this project, the frame columns are irregular structures with rectangular cross-sections combined with attached columns. The attached columns form 90-degree concave-corner irregular cross-sections. The project requires high quality of the appearance of the fair-faced columns, and the geometric dimensional deviations of the cast-in-place structure must meet the requirements of the "Code for Acceptance of Construction Quality of Concrete Structures" GB50204. In addition, the project requires high construction efficiency and the realization of material recycling.

[0024] 1. Fabrication of column hoop components Based on the actual parameters of the frame columns in the project: rectangular frame column cross-section dimensions are 800mm × 800mm, irregularly shaped wall-attached column cross-section dimensions are 300mm × 500mm, and concrete pouring height is 4.5m, the parameters of each component were calculated and determined as follows: Frame column tool-type column hoops: made of 10# channel steel, with a spacing of 600mm; Auxiliary column hoop for irregular cross-section of frame column: Made of No. 8 channel steel welded to form a 90-degree right angle integral rigid component, with rounded inner corners of the external corners to match the internal corners of the template, and the lengths of the horizontal beams are 300mm and 500mm respectively, which fits into the irregular wall-attached column template; Positioning locking pin: Made of φ16mm round steel, 150mm in length, with external thread at the end, and equipped with a matching anti-loosening nut; Positioning and fastening wedge: Made of hardwood, with a cross-sectional size of 30mm×50mm and a length of 200mm.

[0025] 2. Reinforcement Construction Operation The reinforcement construction method of this invention is operated according to the following steps: Step 1: Close the side formwork of the 800mm×800mm rectangular frame column, install 10# channel steel tool-type column hoops at 600mm intervals for temporary fastening, hang a vertical line to ensure verticality, adjust the vertical error of the formwork to 2mm / 2m, and completely fasten each tool-type column hoop with wooden positioning and fastening wedges; Step 2: Check the flatness of the inside corners and side surfaces of the irregular wall-mounted column formwork. If the local flatness deviation is 3mm, use cement mortar leveling parts to level it. After leveling, the deviation should be ≤1.5mm. Install 90-degree right-angle auxiliary column hoops made of No. 8 channel steel at the irregular section position of each tool-type column hoop to ensure that the outside corners are tightly fitted with the inside corners of the formwork and the crossbeams are tightly fitted with the side surfaces of the formwork. Secure the auxiliary column hoops to the formwork as a whole using wooden positioning and fastening wedges. Step 3: Insert the φ16mm round steel positioning lock pins into the corresponding connection holes of the tool-type column hoop and the auxiliary column hoop at 600mm intervals, and tighten the anti-loosening nut at the end to fix them, so that all the tool-type column hoops and auxiliary column hoops form a continuous integral reinforcement system. Step 4: Use ready-mixed concrete for pouring. There was no loosening or deformation of the formwork during the pouring process. After the concrete has cured for 7 days and reached the design demolding strength (C25), demold in the following order: "remove positioning locking pins → remove positioning fastening wedges → remove auxiliary column hoops → remove tool-type column hoops". The demolding process was smooth and there was no damage to the formwork or column hoops.

[0026] 3. Construction effect inspection The frame columns were inspected after the concrete pouring was completed, and the results showed that: Geometric dimensions: The dimensional deviations of rectangular cross-sections and irregularly shaped wall-attached columns are all within ±3mm, and the vertical deviation is 2mm / 2m, which fully comply with the requirements of the "Code for Acceptance of Construction Quality of Concrete Structures" GB50204. Appearance quality: The inside corners of the irregular cross-section are straight, without deformation or warping, the column surface is flat, and there are no defects such as grout leakage or honeycomb pitting. The appearance quality of the clear water column is excellent. Construction efficiency: The reinforcement construction time for a single frame column has been reduced from 2.5 hours using traditional methods to 1.5 hours, increasing construction efficiency by 40%. Material utilization: After cleaning and testing, the disassembled column hoop components showed no structural damage and were successfully applied to the reinforcement of frame columns in subsequent floors, achieving a 100% material reuse rate.

[0027] This invention has substantial features and significant technological advancements. The auxiliary reinforcement method for irregular cross-section frame columns and the reinforcement construction method of this invention can effectively solve the technical problems of reinforcement of irregular cross-section column formwork, ensure construction quality, improve construction efficiency, reduce construction costs, and have good engineering application value.

[0028] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of this invention and are defined by the claims.

Claims

1. A type of auxiliary reinforcement hoop for irregularly shaped cross-section frame columns, characterized in that, The system includes a frame column tool-type column hoop, a frame column irregular section auxiliary column hoop, an irregular section auxiliary column hoop positioning lock pin, and an irregular section auxiliary column hoop positioning and fastening wedge. The frame column irregular section auxiliary column hoop is a 90-degree right-angle integral rigid component formed by integral molding or welding of two side main beams. It has the strength and rigidity to withstand the lateral pressure of concrete pouring. Its 90-degree external angle is adapted to the internal angle contour of the irregular section column formwork, and the horizontal beams on both sides of the right angle are adapted to the contact surface of the irregular section column side formwork. The irregular section auxiliary column hoop positioning and fastening wedge is used for the overall fastening of the frame column tool-type column hoop, as well as the contact fastening of the frame column irregular section auxiliary column hoop with the irregular section column formwork. The irregular section auxiliary column hoop positioning lock pin is used for the upper and lower connection, positioning, and locking of the frame column tool-type column hoop and the frame column irregular section auxiliary column hoop, restricting the displacement of the irregular section auxiliary column hoop and making the two form a whole under stress.

2. The column hoop for auxiliary reinforcement of irregular cross-section frame columns according to claim 1, characterized in that, The frame column tool-type column hoop is a standard reinforcement column hoop adapted to rectangular frame column formwork. As the main load-bearing component of the entire reinforcement system, the concrete pouring lateral pressure borne by the irregular cross-section auxiliary column hoop of the frame column is evenly transmitted to the frame column tool-type column hoop through the positioning and fastening wedge.

3. The column hoop for auxiliary reinforcement of irregular cross-section frame columns according to claim 1, characterized in that, The side main beam of the auxiliary column hoop with irregular cross-section of the frame column is made of steel. The type of steel is determined according to the actual size of the irregular cross-section of the frame column, the concrete pouring height and the calculated value of the lateral pressure. The positioning locking pin is made of wear-resistant metal rod, and the positioning fastening wedge is made of high-strength wood or metal wedge.

4. A reinforcement construction method using the irregular cross-section auxiliary reinforcement column hoop of any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Reinforce the rectangular frame column formwork foundation. Close the side formwork of the rectangular frame column and temporarily tighten the formwork using frame column tool-type column hoops according to the design calculation spacing. Hang a vertical line on the side of the column to ensure verticality and adjust the vertical error of the formwork to within the range of building construction specifications. Use irregular cross-section auxiliary column hoop positioning and tightening wedges to completely tighten each frame column tool-type column hoop to ensure the stability of the main reinforcement system. Step 2: Auxiliary reinforcement of irregular cross-section column formwork. At the corresponding position of the irregular cross-section of each frame column tool-type column hoop that has been tightened, install auxiliary column hoops for irregular cross-section of the frame column. Make the 90-degree external corner of the auxiliary column hoop fit tightly with the internal corner of the irregular cross-section column formwork, and the horizontal beams on both sides of the right angle fit tightly with the outer surface of the side formwork of the irregular cross-section column. Then, use the positioning and fastening wedges of the auxiliary column hoop to fasten the auxiliary column hoop to the formwork as one, so as to achieve precise positioning and reinforcement of the irregular cross-section formwork. Step 3: The overall structure is formed under stress. Using irregular cross-section auxiliary column hoops for positioning and locking, the adjacent irregular cross-section auxiliary column hoops of the frame columns are connected, positioned and locked to the tool-type column hoops of the frame columns. This makes all the tool-type column hoops of the frame columns and the irregular cross-section auxiliary column hoops of the frame columns form a continuous integral reinforcement system, so as to achieve uniform transmission of the lateral pressure of the irregular cross-section template to the main reinforcement system.

5. The reinforcement construction method according to claim 4, characterized in that, In step 1, the spacing of the column hoop arrangement is determined based on the cross-sectional dimensions of the frame column, the concrete pouring height, and the calculated value of the concrete lateral pressure. The deviation between the actual installation spacing of the column hoop and the design spacing is controlled within ±5mm. The vertical error of the template is adjusted to ≤3mm / 2m.

6. The reinforcement construction method according to claim 4, characterized in that, In step 2, before installing the auxiliary column hoop for the irregular cross-section of the frame column, the flatness of the inside corner and side surface of the irregular cross-section column template is checked. When the flatness deviation is greater than 2mm, a special leveling part is used for leveling to ensure the fit between the auxiliary column hoop and the template.

7. The reinforcement construction method according to claim 4, characterized in that, In step 3, the installation spacing of the positioning locking pins is consistent with the spacing of the column hoop arrangement. After the locking pins are inserted into the corresponding connection holes of the tool-type column hoop and the auxiliary column hoop, they are fixed with anti-loosening clips or anti-loosening nuts to prevent the locking pins from falling off due to vibration during the concrete pouring process.

8. The reinforcement construction method according to any one of claims 4-7, characterized in that, After the concrete is poured and reaches the designed demolding strength, demolding is carried out in the following order: "first remove the positioning locking pins → then remove the positioning fastening wedges → finally remove the auxiliary column hoops of the irregular cross section of the frame column and the tool-type column hoops of the frame column". After the disassembled parts are cleaned and the structural integrity is tested, they can be reused for the reinforcement construction of the frame column formwork in subsequent projects.

Images