Adjustable arc shear wall formwork and construction method

Abstract

The invention relates to an adjustable arc-shaped shear wall formwork and a construction method. The adjustable arc-shaped shear wall formwork comprises a formwork body, a back ridge, a fixed seat, a sliding seat, a connecting rod, a ball seat and a locking mechanism. Back ridges are arranged on the back side of the formwork, the first back ridge is slidably sleeved with the sliding seats at intervals, the fixed seat is fixed to the second back ridge and corresponds to the middles of the two sliding seats, and the first back ridge is adjacent to the second back ridge. The two ends of the connecting rod are connected to the fixed seat and the sliding seat through ball seats to form a V-shaped supporting system. The locking mechanism is arranged on the back ridge or the sliding seat and used for locking the sliding state of the sliding seat. The distance between the back arrises is adjusted through the back arrises, the sliding seats, the fixed seats and the V-shaped supporting system to achieve radian control, and the stability and accuracy are improved in cooperation with the locking and driving mechanism; a one-way retaining and left-hand thread screw sliding seat locking adjusting structure is utilized, the operation efficiency and adaptability are optimized, traditional bolts are replaced by scattered stress, sliding adjustment and the like on the whole, and the construction efficiency and quality are improved.

Description

Technical Field

[0001] This invention relates to the field of curved formwork manufacturing technology, specifically to an adjustable curved shear wall formwork and its construction method. Background Technology

[0002] The main materials used in building formwork include plastics, wood, aluminum, steel, fiberglass, and composite materials. With the rapid development of the social economy, irregular structural systems are increasingly used in modern construction projects. This is primarily due to the ever-increasing demands for aesthetically pleasing building structures, especially the growing prevalence of circular and circular-structured columns. However, the joints between cast-in-place reinforced concrete circular and curved columns and beams present complex conditions, high technical requirements, and significant challenges, substantially impacting project quality, schedule, and construction costs. Therefore, finding an economical and effective solution for formwork construction at the joints between curved concrete shear walls and beams / columns has become a major technical challenge that urgently needs to be addressed.

[0003] Commonly used formwork for circular concrete structures in the construction industry includes standardized steel formwork, wooden strip assembly formwork, fiberglass formwork, and PVC formwork. Except for wooden strip assembly formwork, which is not only time-consuming and labor-intensive but also produces poor construction results and has low recyclability, the other three types of circular formwork each have their unique advantages. However, all of these formwork types also have many shortcomings and limitations in their use, causing considerable inconvenience to construction.

[0004] The mainstream solution for adjusting the curvature of existing curved shear wall formwork is still the bolt-tied structure. The principle is to arrange multiple back ribs in parallel on the back side of the formwork, and to insert tie bolts through corresponding positions of adjacent back ribs by making through holes and tightening them with nuts. The tension of the bolts forces the back ribs to produce relative displacement, thereby causing the formwork to bend to form the required curvature.

[0005] However, this adjustment method has many limitations in practical applications: existing template adjustment mechanisms mostly rely on tie bolts, which must be completely hidden between the back ribs on the back of the template. The limited spacing and thickness of the back ribs result in limited operating space for the bolts and nuts, severely compressing the working space for tools (such as wrenches). Especially when adjusting areas with large curvature, the increased inclination angle of the back ribs makes the interference between the bolts and the ribs more pronounced. Tightening the nuts often requires repeated adjustments of the tool angle, and sometimes even disassembly of part of the back ribs for temporary expansion, leading to extremely low operational efficiency.

[0006] Meanwhile, the deformation of the back rib depends entirely on the single-point tensile force of the tie bolts, and the load is concentrated at the contact point between the bolts and the back rib. When the formwork height exceeds 3m or the curvature is large, local stress concentration is likely to occur at the bolt tie points of the back rib. Long-term stress may cause the back rib to crack, the bolt holes to deform, or even cause instability of the formwork support system, increasing the risk of formwork bulging and running away.

[0007] The curvature of the template is controlled by the coordinated length of multiple sets of tie bolts. The adjustment range of a single bolt is limited by its own length, requiring a large number of bolts. However, the feed rate of the nuts is difficult to quantify and control. When multiple bolts are adjusted simultaneously, uneven force is likely to occur, resulting in defects such as broken lines and unevenness on the curved surface of the template. Repeated checks and adjustments are required, further reducing construction efficiency.

[0008] In addition, an excessive number of bolts will increase the workload of installation, disassembly and post-cleaning, and the frequent friction between the bolts and the back ribs will easily cause component wear, reduce the turnover of the formwork, and further increase the construction cost. Based on this, it is necessary to study an adjustable arc shear wall formwork and construction method. Summary of the Invention

[0009] Therefore, the purpose of this invention is to provide an adjustable curved shear wall formwork and construction method, which effectively solves the problems of small operating space, weak stress strength and low turnover rate in the construction method.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an adjustable arc-shaped shear wall formwork, comprising a formwork, a back rib, a fixed seat, a sliding seat, a connecting rod, a ball seat, and a locking mechanism; the back rib is provided on the back side of the formwork, the sliding seat is slidably fitted onto the first back rib at intervals, the fixed seat is fixed on the second back rib and corresponds to the middle of the two sliding seats, the first back rib and the second back rib are adjacent; the two ends of the connecting rod are connected to the fixed seat and the sliding seat via the ball seat to form a V-shaped support system; the locking mechanism is provided on the back rib or the sliding seat and is used to lock the sliding state of the sliding seat.

[0011] Furthermore, a limiting groove is provided on the back rib, the sliding seat is slidably fitted into the limiting groove, and the fixed seat is fastened and fixed on the back rib.

[0012] Furthermore, the locking mechanism includes a locking rod, a locking block, and a handle. The locking rod is threaded to the side of the sliding seat, a locking block is provided at the inner end of the locking rod, and a handle is provided at its end.

[0013] Furthermore, the locking block is fixed to the locking rod by screws, and the sliding seat is provided with screw holes and clearance grooves. The locking block is located in the clearance groove, the locking block corresponds to the limiting groove, and a friction layer is provided on the opposite surfaces of the two.

[0014] Furthermore, a rack is provided in the limiting groove, and the locking mechanism includes a swing arm, a spring and a stop block. The swing arm is hinged to the sliding seat, the stop block is located at the lower end of the swing arm and cooperates with the rack, and the upper end of the swing arm is connected to the sliding seat via a spring, so that the stop block fits against the rack.

[0015] Furthermore, the locking mechanism is mounted on the mounting base, and mounting areas adapted to the mounting base are provided on both sides of the sliding block.

[0016] Furthermore, it also includes a drive mechanism, which is an externally powered mechanism, including a bracket, a crossbeam, a movable seat, a telescopic cylinder, and a drive seat. A drive rod is provided on the side of the back rib, a horizontal crossbeam is provided on the bracket, the movable seat is slidably fitted on the crossbeam, and a telescopic cylinder is provided on the movable seat. The end of the telescopic cylinder is connected to the drive seat, and the drive seat is provided with a slot corresponding to the drive rod.

[0017] Furthermore, an adjusting block is fixedly installed on the sliding seat, a support is installed on the fixed seat, and a reverse threaded screw is rotatably installed on the support. The two threaded sections of the reverse threaded screw are adapted to be fitted onto the adjusting blocks on both sides, and a drive handle is installed at the end of the reverse threaded screw.

[0018] Furthermore, one or more sets of the V-shaped support systems are provided on the two adjacent back ribs.

[0019] A construction method for an adjustable curved shear wall formwork includes the following steps; Step 1: Prepare templates of the appropriate size according to construction requirements and fix the back ribs to the templates; Step 2: Install the fixing seat onto the back rib and fix it to the back rib from the front with bolts; slide the sliding seat into the back rib from the end of the back rib and adjust the position of the sliding seat. Then fix the connecting rod onto the ball joint to form a V-shaped support system. Step 3: Apply external force to the corresponding back rib to change the position of the back rib relative to the adjacent back rib, and use the locking mechanism to lock the sliding seat. Step 4: Operate the corresponding back ribs one by one until the template is bent and shaped; Step 5: Finally, check the curvature of the template.

[0020] The beneficial effects of the above technical solution are as follows: This invention addresses the problems of operational difficulties, concentrated stress, high material consumption, and low construction efficiency associated with traditional curved shear wall formwork that relies on bolt-locking adjustments. It proposes an adjustable curved shear wall formwork and construction method centered on "controllable formwork deformation + adjustable back rib spacing." Multiple back ribs are installed on the back side of the formwork. Flexible adjustment of the spacing between adjacent back ribs is achieved through sliding seats (slidingly fitted onto the back ribs), fixed seats (fixed to adjacent back ribs), and connecting rods (ball seats connecting to form V-shaped supports). When the sliding seat changes position, the connecting rods cause the back rib spacing to change, thereby bending the formwork to the required curvature. The position of the sliding seat is fixed by a locking mechanism (locking rod, locking block) to ensure stability after adjustment. An external drive mechanism (telescopic cylinder, etc.) applies external force to assist in precise formwork deformation. By distributing stress, sliding adjustment, and simplifying components to replace traditional bolt-locking, the accuracy and stability of the curved formwork adjustment are improved while reducing material consumption and construction workload, thus meeting the high-efficiency construction requirements of curved shear walls.

[0021] Meanwhile, this invention employs a unidirectional anti-reverse structure with a rack and pinion mechanism and an anti-reverse block. Under the external force of the driving mechanism, the sliding seat can actively slide outward and automatically lock upon reaching its position (preventing inward movement). This eliminates the need for manual tightening, simplifying the operation process and significantly improving construction efficiency. The toothed anti-reverse structure has a large contact area and a strong locking effect, making it less prone to loosening compared to friction locking, further ensuring the positional stability of the template after adjustment.

[0022] This invention also allows for simultaneous adjustment of the distance between the two sliding seats by rotating the drive handle using a counter-threaded screw and an adjusting block. This makes the adjustment process more intuitive and controllable, avoiding errors associated with manual sliding adjustments. The self-locking characteristic of the thread enables the sliding seat position to be locked, eliminating the need for additional locking operations. Furthermore, the locking mechanism allows for temporary on-site reinforcement, adapting to different construction scenarios.

[0023] The above content addresses the problems of traditional curved shear wall formwork relying on bolted adjustment, such as operational difficulties, concentrated stress, and high material consumption. It proposes an adjustable curved shear wall formwork and construction method, using deformable wooden formwork as its core. The curvature is controlled by adjusting the spacing of the back ribs through a back rib, sliding seat, fixed seat, and V-shaped support system. Locking and driving mechanisms enhance stability and accuracy. The sliding seat locking adjustment structure with one-way anti-reverse screws further optimizes operational efficiency and adaptability. Overall, by distributing stress and using sliding adjustment, it replaces traditional bolts, improving construction efficiency and quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 for Figure 1 A top-view structural diagram; Figure 3 for Figure 1 Schematic diagram of the central main view structure; Figure 4 A schematic diagram of one implementation structure of the locking mechanism; Figure 5 A schematic diagram of the implementation structure of the stop-retreat structure; Figure 6 Schematic diagram of the front view structure of the stop-retraction structure; Figure 7 This is a schematic diagram of the implementation structure of the drive mechanism; Figure 8 This is a schematic diagram of a reverse thread drive structure.

[0025] Reference numerals: 1-Template, 2-Back rib, 3-Fixed seat, 4-Sliding seat, 5-Ball seat, 6-Connecting rod, 7-Drive rod, 8-Limit groove, 9-Locking rod, 10-Handle, 11-Locking block, 12-Screw, 13-Left mounting area, 14-Right mounting area, 15-Rack, 16-Swing arm, 17-Anti-reverse block, 18-Spring, 19-Mounting seat, 20-Bracket, 21-Crossbeam, 22-Moving seat, 23-Telescopic cylinder, 24-Drive seat, 25-Base template, 26-Support, 27-Reverse threaded screw, 28-Adjusting block, 29-Drive handle. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1: This example aims to provide an adjustable curved shear wall formwork and construction method, mainly used for the fabrication of curved formwork. Existing curved formwork adjustment structures mostly rely on bolt tie rods to control the curvature: tie rods are installed between the back ribs on the back side of the formwork, and the bolt length is adjusted by turning the nuts, causing the back ribs to bend the formwork to form the desired curvature. However, this structure has significant drawbacks: Firstly, the tie rods need to be installed on the back side of the formwork, which is obstructed by the formwork itself and the back ribs, resulting in limited tool working space and difficulty in turning the nuts. Especially in areas with large curvature, bolt adjustment is easily limited by space constraints. First, the back ribs are difficult to control precisely; second, the stress on the back ribs is concentrated at the tie bolt connection points, and the concentrated load can easily cause local deformation or damage to the back ribs at the tie points, affecting the overall stability of the formwork; third, the curvature adjustment of the formwork depends entirely on the change in bolt length, but the adjustment range of a single bolt is limited, requiring a large number of bolts to be laid out for adjustment, which not only increases material consumption, but also makes it difficult to adjust multiple bolts simultaneously, and is prone to adjustment deviations, resulting in low construction efficiency; in addition, too many bolts will also increase the workload of installation and subsequent dismantling, further restricting the construction progress. Based on this, this embodiment provides an adjustable curved shear wall formwork.

[0027] like Figure 1As shown, an adjustable curved shear wall formwork includes a formwork 1, a back rib 2, a fixed seat 3, a sliding seat 4, a connecting rod 6, a ball seat 5, and a locking mechanism. In this embodiment, the formwork 1 is made of a deformable material, and the shaped curved wooden formwork is the core component of this formwork system, with its inner surface directly bonded to the cast-in-place concrete. The shaped curved wooden formwork is made of high-quality birch and poplar wood, which is shaped using high-temperature and high-pressure reinforcement drawing technology to utilize its good bending properties, resulting in lightweight and high-strength characteristics. The two ends of the formwork are provided with grooves to prevent the vertical joints of the formwork 1 from being tightly joined, preventing grout leakage and improving the overall integrity of the formwork 1 system. The inner surface of the formwork 1, which is in direct contact with the cast-in-place concrete, is coated with an epoxy resin film, which not only has excellent air permeability but is also smooth, waterproof, and easy to demold, allowing for easy demolding without the need for a release agent during use.

[0028] The template 1 has a back rib 2 on its back side. In this embodiment, the back rib 2 is connected to the back side of the template 1. The template 1 can be bent by adjusting the spacing between adjacent back ribs 2.

[0029] In order to adjust the spacing between adjacent back ribs 2, in this embodiment, the sliding seat 4 is slidably mounted on the first back rib 2 at intervals, and the fixed seat 3 is fixed on the second back rib 2 and corresponds to the middle of the two sliding seats 4. The first back rib 2 and the second back rib 2 are adjacent. In order to facilitate the limiting assembly of the sliding seat 4 and the fixed seat 3, a limiting groove 8 is provided on the back rib 2. The sliding seat 4 is slidably mounted in the limiting groove 8, and the fixed seat 3 is fastened and fixed on the back rib 2.

[0030] like Figure 1-3 As shown in the figure, in this embodiment, eight back ribs 2 are provided on the template 1. Two sliding seats 4 are provided on the first back rib 2, and a fixed seat 3 is provided on the eighth back rib 2. The remaining back ribs 2 are provided with two sliding seats 4 and one fixed seat 3. The fixed seat 3 is located in the middle area of ​​the back rib 2, and the sliding seats 4 are located on both sides of the back rib 2 and are symmetrical about the fixed seat 3.

[0031] In this embodiment, the two ends of the connecting rod 6 are connected to the fixed seat 3 and the sliding seat 4 via ball seats 5 to form a V-shaped support system. When subjected to force, the length of the connecting rod 6 is fixed. When the distance between the two back ribs 2 decreases, the two sliding seats 4 slide to both sides and the angle changes. The ball joint structure can adapt to the angle change and the position change of the sliding seat 4, so it is only necessary to lock the position of the sliding seat 4.

[0032] To lock the position of the sliding seat 4, a locking mechanism is provided on the back rib 2 or the sliding seat 4 in this embodiment to lock the sliding state of the sliding seat 4. As one implementation method, this embodiment uses friction as the locking force, specifically as follows... Figure 4As shown, the locking mechanism includes a locking rod 9, a locking block 11, and a handle 10. The locking rod 9 is threadedly connected to the side of the sliding seat 4. A locking block 11 is provided at the inner end of the locking rod 9, and a handle 10 is provided at its end. By turning the handle 10, the locking rod 9 is rotated, and the locking rod is pushed forward by means of the thread, thereby generating friction between the sliding seat 4 and the inner wall of the back rib 2, thus locking the position of the sliding seat 4.

[0033] For ease of installation, in this embodiment, the locking block is fixed to the locking rod 9 with screws. The sliding seat 4 is provided with screw holes and clearance grooves. The locking block is located in the clearance groove. The locking block 11 corresponds to the limiting groove, and a friction layer is provided on the opposite surfaces of the two.

[0034] As an extension of this embodiment, one or more sets of the V-shaped support systems are provided on the two adjacent back ribs 2. For small-area structures, a set of V-shaped support systems can be used to adjust the curvature of the template 1, and multiple sets of templates 1 can be assembled to form an overall template. Of course, multiple sets of V-shaped support systems can also be arranged to achieve large-area curvature template adjustment.

[0035] In view of the above structure, this embodiment provides a construction method for adjustable arc-shaped shear wall formwork, including the following steps; Step 1: Prepare templates of the appropriate size according to construction requirements, and fix the back ribs 2 onto the templates; Step 2: Fasten the fixed seat 3 onto the back rib 2 and fix it to the back rib 2 from the front with bolts; slide the sliding seat 4 into the back rib 2 from the end of the back rib 2 and adjust the position of the sliding seat 4. Then fix the connecting rod 6 onto the ball joint to form a V-shaped support system. Step 3: Apply an external force to the corresponding back rib 2 to change the position of the back rib 2 relative to the adjacent back rib 2, and use a locking mechanism to lock the sliding seat 4; the external force can be applied by a drive mechanism, such as... Figure 7 As shown, the drive mechanism is externally powered and includes a bracket 20, a crossbeam 21, a movable seat 22, a telescopic cylinder 23, and a drive seat 24. A drive rod 7 is provided on the side of the back rib 2. A horizontal crossbeam 21 is provided on the bracket 20. The movable seat 22 is slidably fitted onto the crossbeam 21, and a telescopic cylinder 23 is provided on the movable seat 22. The end of the telescopic cylinder 23 is connected to the drive seat 24, and the drive seat 24 is provided with a slot corresponding to the drive rod 7. A prefabricated base template is provided at the bottom of the bracket 20. The arc-shaped template is placed on the base template 25. Then, the movement of the movable seat 22 drives the telescopic cylinder 23 to be above the drive rod 7. Then, force is applied to the drive rod 7 from both ends, causing the arc-shaped template to deform and the sliding seat 4 to slide. Then, the locking block is pressed against the back rib 2 by the handle to lock the position of the sliding seat 4.

[0036] Step 4: Operate the corresponding back ribs 2 one by one until the template is bent and shaped; Step 5: Finally, check the curvature of the template.

[0037] Traditional bolt tie rod adjustment suffers from limited tool working space and difficulty in tightening nuts due to obstruction by the template and back rib 2, especially in areas with large curvature where precise control is difficult. In contrast, this embodiment adjusts the spacing of the back rib 2 using a sliding seat 4, a fixed seat 3, and a V-shaped support system. This eliminates spatial limitations and allows for more flexible sliding adjustment of the sliding seat 4, reducing operational difficulty.

[0038] Meanwhile, traditional bolt adjustment relies on the coordination of multiple bolts, making synchronous adjustment difficult and prone to deviation. This embodiment uses a single or multiple sets of V-shaped support systems for coordinated adjustment, resulting in more synchronized adjustment of the spacing between adjacent back ribs, reducing adjustment deviation, and improving construction efficiency.

[0039] Traditional tie bolts concentrate the force on the back rib 2 at the connection point, which can easily lead to local deformation or damage. In this embodiment, the V-shaped support system distributes the load through the connecting rod 6, making the force on the back rib 2 more even, reducing the risk of local damage, and enhancing the overall stability of the template.

[0040] Therefore, addressing the problems of operational difficulties, concentrated stress, high material consumption, and low construction efficiency associated with traditional bolt-operated adjustment of curved shear wall formwork, this paper proposes an adjustable curved shear wall formwork and construction method centered on controllable formwork deformation and adjustable back rib spacing. Multiple back ribs 2 are installed on the back side of the formwork. Flexible adjustment of the spacing between adjacent back ribs 2 is achieved through sliding seats 4 (slidingly fitted onto the back ribs 2), fixed seats 3 (fixed to adjacent back ribs 2), and connecting rods 6 (connected by ball seats 5 to form a V-shaped support). When the sliding seat 4 slides and changes position, the connecting rod 6 causes the back rib spacing to change, thereby bending the formwork to the required curvature. The position of the sliding seat 4 is fixed by a locking mechanism (locking rod 9, locking block) to ensure stability after adjustment. An external drive mechanism (extension cylinder 23, etc.) applies external force to assist in precise formwork deformation. By distributing stress, sliding adjustment, and simplifying components to replace traditional bolt-operated adjustment, the accuracy and stability of the curved formwork adjustment are improved while reducing material consumption and construction workload, thus meeting the high-efficiency construction requirements of curved shear walls.

[0041] Example 2 provides another implementation structure for locking the sliding seat 4.

[0042] like Figure 5-6As shown in the diagram, this embodiment uses a unidirectional anti-reverse structure to lock the position of the sliding seat 4. Specifically, a rack 15 is provided in the limiting groove. The locking mechanism includes a swing arm 16, a spring 18, and an anti-reverse block 17. The swing arm 16 is hinged to the sliding seat 4. The anti-reverse block 17 is located at the lower end of the swing arm 16 and cooperates with the rack 15. The upper end of the swing arm 16 is connected to the sliding seat 4 via the spring 18, so that the anti-reverse block 17 fits against the rack 15. The locking mechanism is provided on the mounting base 19. Mounting areas adapted to the mounting base are provided on both sides of the sliding block, such as... Figure 5 As shown, the installation area includes a left installation area 13 and a right installation area 14. The mounting base 19 can be selectively assembled in the corresponding installation area to achieve positioning, locking, and stopping in two directions, adapting to the curvature in different directions. At the same time, an adapter seat is provided on the mounting base 19. In the locked and locked state, the swing arm fits against the adapter seat to prevent further movement, thereby further improving the stability in the locked state.

[0043] The driving mechanism described in Example 1 is used to actively deform the arc-shaped template. Then, the sliding seat 4 moves outward in one direction. The anti-reverse structure allows the sliding seat 4 to actively slide outward while preventing it from moving inward. Thus, when an external force is applied, the sliding seat 4 can actively move outward and lock in place. With this structure, the sliding seat 4 can be automatically locked without manual operation. The operation is simple and greatly improves the construction efficiency. Moreover, the anti-reverse structure adopts a toothed anti-reverse, which has a good locking effect and good stability.

[0044] Example 3 provides another adjustment structure to adjust the position of the sliding seat 4.

[0045] This implementation example Figure 8 As shown, an adjusting block 28 is fixedly installed on the sliding seat 4, a support 26 is installed on the fixed seat 3, a reverse threaded screw 27 is rotatably installed on the support 26, the two threaded sections of the reverse threaded screw 27 are adapted to be fitted on the adjusting blocks 28 on both sides, and a drive handle 29 is provided at the end of the reverse threaded screw 27.

[0046] This embodiment uses a reverse thread structure to adjust the spacing of the sliding seat 4, and uses the thread self-locking to lock the position of the sliding seat 4. In this embodiment, the above structure is arranged on the back rib 2 to realize the position adjustment of the sliding seat 4. Of course, the adjustment block 28 can also be temporarily fixed on the sliding seat 4 and self-locked by the locking mechanism in embodiment 2. After the adjustment is completed, the structure is removed to realize the temporary reinforcement work on site.

[0047] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is to replace multiple bolts with components such as sliding seat 4, fixed seat 3, and connecting rod 6, which reduces the amount of material used. Installation only requires sliding assembly and locking, and disassembly is simple, reducing construction steps and accelerating construction progress. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An adjustable arc-shaped shear wall formwork, characterized in that: The system includes a template, a back rib, a fixed seat, a sliding seat, a connecting rod, a ball seat, and a locking mechanism. The template has a back rib on its back side. The sliding seats are slidably fitted onto the first back rib at intervals. The fixed seat is fixed onto the second back rib and corresponds to the middle of the two sliding seats. The first back rib and the second back rib are adjacent to each other. The two ends of the connecting rod are connected to the fixed seat and the sliding seat via ball seats to form a V-shaped support system. The locking mechanism is provided on the back rib or the sliding seat and is used to lock the sliding state of the sliding seat.

2. The adjustable arc-shaped shear wall formwork according to claim 1, characterized in that: The back rib is provided with a limiting groove, the sliding seat is slidably fitted into the limiting groove, and the fixed seat is fastened and fixed to the back rib.

3. The adjustable arc-shaped shear wall formwork according to claim 2, characterized in that: The locking mechanism includes a locking rod, a locking block, and a handle. The locking rod is threaded to the side of the sliding seat, a locking block is provided at the inner end of the locking rod, and a handle is provided at its end.

4. The adjustable arc-shaped shear wall formwork according to claim 3, characterized in that: The locking block is fixed to the locking rod by screws. The sliding seat is provided with screw holes and clearance grooves. The locking block is located in the clearance groove. The locking block corresponds to the limiting groove, and a friction layer is provided on the opposite surfaces of the two.

5. The adjustable arc-shaped shear wall formwork according to claim 2, characterized in that: A rack is provided in the limiting groove. The locking mechanism includes a swing arm, a spring and a stop block. The swing arm is hinged to the sliding seat. The stop block is located at the lower end of the swing arm and cooperates with the rack. The upper end of the swing arm is connected to the sliding seat via a spring, so that the stop block fits against the rack.

6. The adjustable arc-shaped shear wall formwork according to claim 5, characterized in that: The locking mechanism is mounted on the mounting base, and mounting areas adapted to the mounting base are provided on both sides of the sliding block.

7. The adjustable arc-shaped shear wall formwork according to claim 5, characterized in that: It also includes a drive mechanism, which is an externally powered mechanism, including a bracket, a crossbeam, a movable seat, a telescopic cylinder, and a drive seat. A drive rod is provided on the side of the back rib, a horizontal crossbeam is provided on the bracket, the movable seat is slidably fitted on the crossbeam, and a telescopic cylinder is provided on the movable seat. The end of the telescopic cylinder is connected to the drive seat, and the drive seat is provided with a slot corresponding to the drive rod.

8. The adjustable arc-shaped shear wall formwork according to claim 1 or 2, characterized in that: An adjusting block is fixedly installed on the sliding seat, a support is installed on the fixed seat, and a reverse threaded screw is rotatably installed on the support. The two threaded sections of the reverse threaded screw are adapted to be installed on the adjusting blocks on both sides, and a drive handle is installed at the end of the reverse threaded screw.

9. The adjustable arc-shaped shear wall formwork according to claim 1, characterized in that: One or more sets of the V-shaped support systems are provided on two adjacent back ribs.

10. A construction method for an adjustable arc-shaped shear wall formwork, characterized in that: Includes the following steps; Step 1: Prepare templates of the appropriate size according to construction requirements and fix the back ribs to the templates; Step 2: Install the fixing seat onto the back rib and fix it to the back rib from the front with bolts; slide the sliding seat into the back rib from the end of the back rib and adjust the position of the sliding seat. Then fix the connecting rod onto the ball joint to form a V-shaped support system. Step 3: Apply external force to the corresponding back rib to change the position of the back rib relative to the adjacent back rib, and use the locking mechanism to lock the sliding seat. Step 4: Operate the corresponding back ribs one by one until the template is bent and shaped; Step 5: Finally, check the curvature of the template.

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