Steel reinforced concrete shear wall with prefabricated removable formwork

Abstract

The utility model discloses a kind of steel reinforced concrete shear walls with prefabricated disassembly-free formwork, it includes: disassembly-free wall formwork, disassembly-free wall formwork is modularized rectangular cavity structure, and two inner side walls of disassembly-free wall formwork close to edge end are oppositely provided with rail groove;Embedded steel plate assembly is located in the cavity of disassembly-free wall formwork and is slidably connected with the two rail grooves opposite;Horizontal tie is horizontally placed in the cavity of disassembly-free wall formwork and its two ends are respectively fixedly connected with embedded steel plate assembly close to side;Concrete filler is cast-in-place in the cavity of disassembly-free wall formwork and is integrally solidified with embedded steel plate assembly and horizontal tie, when construction, prefabricated parts are connected according to preset requirement after fixed, disassembly-free wall formwork with cavity is formed;Assembled embedded steel plate assembly, and two ends side embedded steel plate assembly is pulled together using multiple horizontal ties, finally cast-in-place concrete, the utility model structure is simple, convenient to assemble, shorten construction period, and the strength of wall formed simultaneously is high, and the ability of anti-seismic is strong.

Description

Technical Field

[0001] This utility model belongs to the field of wall construction technology in building engineering, and specifically relates to a steel-reinforced concrete shear wall with prefabricated, non-removable formwork. Background Technology

[0002] Shear walls are key lateral force resisting components in building structures that bear horizontal loads such as wind loads and seismic loads, as well as vertical loads. Their core function is to prevent shear failure of the structure, and they play a decisive role in ensuring the overall safety and stability of the building.

[0003] Currently, traditional reinforced concrete shear wall construction primarily employs on-site rebar tying, formwork erection, and concrete pouring. This process requires a significant amount of manual labor for rebar tying and formwork installation, resulting in complex procedures, high labor intensity, and a long construction period, severely impacting construction efficiency and quality control. Furthermore, the formwork removal process easily leads to material damage and resource waste, making it difficult to meet the requirements of current industrialized and green construction practices.

[0004] Steel-reinforced concrete shear walls combine the excellent ductility and seismic performance of steel structures with the high stiffness and load-bearing capacity of concrete structures, and have become the core lateral force resisting system for high-rise and super high-rise buildings and high-intensity seismic fortification zones.

[0005] However, in the field of precast, formwork-free shear wall structures, existing technologies generally suffer from the following key problems, which restrict their industrialization and performance improvement: (1) Low construction efficiency and insufficient industrialization In traditional shear wall construction, the on-site formwork erection, dismantling, and rebar tying processes are cumbersome, accounting for over 60% of the total construction period. Existing non-removable formwork systems still rely on on-site assembly and support structure erection, only shortening the construction cycle by a limited 10%–15%, with minimal improvement. Furthermore, the lack of standardized prefabricated components often necessitates extensive on-site cutting, welding, and other secondary processing, leading to low construction efficiency and high labor costs, failing to realize the industrial advantages of prefabricated construction.

[0006] (2) Weak structural integrity and seismic performance Existing formwork systems often lack reliable rigid connections with the internal steel frame, making them prone to peeling or displacement during concrete pouring, thus affecting the quality of the finished product. In terms of structural stress, the shear resistance between the steel frame and concrete relies primarily on stud connections, which are susceptible to relative slippage under cyclic loads such as earthquakes, leading to a 15%–20% decrease in the shear wall's shear capacity. Furthermore, the loose arrangement and inaccurate positioning of the transverse reinforcement make it difficult to form an effective, coordinated load-bearing system with the formwork and steel frame, severely restricting the wall's seismic performance.

[0007] (3) Waste of resources and poor environmental performance Traditional wooden formwork suffers from a 30%–40% damage rate during dismantling, has limited reuse cycles, and results in significant material waste. On-site construction generates substantial amounts of construction waste and dust, failing to meet the requirements of green construction processes and efficient material resource utilization in modern construction, and thus struggling to meet the current trend of low-carbon building.

[0008] (4) Poor adaptability and low construction accuracy Existing formwork systems designed for fixed wall thicknesses lack flexible and adjustable structural measures, making them difficult to adapt to diverse structural design needs. On-site assembly relies on manual measurement and adjustment, and the accumulation of errors leads to loose formwork joints and widespread concrete leakage, with leakage rates exceeding 30%. This severely affects the accuracy of wall cross-sectional dimensions and the quality of concrete forming, thereby weakening structural durability.

[0009] Therefore, how to provide a steel-reinforced concrete shear wall with prefabricated, non-removable formwork is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0010] In view of this, the present invention provides a steel-reinforced concrete shear wall with prefabricated, non-removable formwork, which saves materials, enables rapid construction, provides a stable formed structure, and significantly improves product quality.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: a steel-reinforced concrete shear wall with prefabricated, non-removable template, comprising: a non-removable template, wherein the non-removable template is a modularly assembled rectangular cavity structure, and the two inner sidewalls of the non-removable template near the edge are provided with opposing track grooves. An embedded steel plate assembly is located within the cavity of the non-removable wall template and is slidably connected to two opposing rail grooves. A horizontal tie rod is placed horizontally inside the cavity of the non-removable wall template, and its two ends are respectively fixedly connected to the embedded steel plate assembly on the nearby side. The concrete filler is cast in place into the cavity of the non-removable wall formwork and is integrally cured and formed with the embedded steel plate assembly and horizontal tie rod.

[0012] The beneficial technical effects of this utility model are as follows: The modular assembly of the non-removable wall formwork is based on the independent prefabrication of components, effectively ensuring the dimensional accuracy and quality consistency of the components. On-site operations are mainly assembly-based, which is simple to operate, greatly reducing on-site welding and wet work, significantly improving construction efficiency, and shortening the construction cycle. During the construction phase, the non-removable wall formwork is used in conjunction with the concrete filler and does not need to be removed after pouring. During the use phase, the non-removable wall formwork works together with the internal concrete to share the load, realizing the integration of formwork function and structural stress. At the same time, the added embedded steel plate components and horizontal tie rods can improve the comprehensive stress system of the non-removable wall formwork, thereby improving the adhesion performance between the components and the concrete filler and improving the deformation resistance of the wall.

[0013] Preferably, the non-removable wall template includes a main formwork steel plate, end-side sealing plates, and tie bars. The main formwork steel plate, end-side sealing plates, and tie bars are all prefabricated components. Two sets of the main formwork steel plates are arranged in parallel and spaced apart, serving as the two side plates of the non-removable wall template. Two sets of end-side sealing plates are connected to both ends of the main formwork steel plate. The two sets of main formwork steel plates and the two sets of end-side sealing plates cooperate to form a rectangular cavity structure. Multiple tie bars are arranged in parallel between the two sets of main formwork steel plates.

[0014] The resulting technical effect is that the prefabricated components such as the main formwork steel plate, end sealing plates and tie bars are spliced ​​to form a non-removable wall formwork, which forms an integral steel frame that bears the load while satisfying the constraint function of concrete pouring and forming.

[0015] Preferably, it also includes a transition plate, which is used to transitionally connect the main mold steel plate and the end sealing plate. The transition plate is located in the cavity of the non-removable wall template and is fixedly connected to the main mold steel plate and the end sealing plate by fasteners.

[0016] The resulting technical effect is that the main formwork steel plate and the end sealing plate are connected by the transition plate arranged on the inner side, so that the wall formwork structure can be removable while maintaining a strong overall appearance and avoiding the components from protruding.

[0017] Preferably, the transition plate is a steel strip, and multiple bolt holes are arranged side by side on the transition plate. Bolt holes are also provided on the main mold steel plate and the end sealing plate. The transition plate is connected to the main mold steel plate and the end sealing plate by bolt fasteners.

[0018] The resulting technical effect is that the transition plate is also a prefabricated component, which can be prefabricated in the factory according to the required standards.

[0019] Preferably, the main mold steel plate is provided with a plurality of tie rod holes, and the two ends of the tie rods extend to the outer side of the main mold steel plate and are anchored by locking nuts.

[0020] The resulting technical effect is that the tie holes can be designed and laid out in multiple rows as needed, and the tie bars tie the main formwork steel plates on both sides, forming a circumferential constraint with the end sealing plates. This constraint makes the concrete less likely to suddenly crush under great pressure and can withstand greater deformation, thus significantly improving the ductility of the wall.

[0021] Preferably, the end-side sealing plate is a side-mounted U-shaped structural plate, with the opening of the end-side sealing plate facing the main mold steel plate, and the rail groove is provided on the two inner side walls of the end-side sealing plate.

[0022] The resulting technical effects are: the end-side sealing plates are used to form a constraint cavity with the two sets of main mold steel plates, while simultaneously shaping the concrete foundation. The track grooves facilitate the sliding assembly of the embedded steel plate components, improving on-site assembly efficiency, and providing a supporting foundation for the three-dimensional support system.

[0023] Preferably, the embedded steel plate assembly includes multiple embedded plates and multiple positioning plates. The embedded plates are rectangular plates, and multiple U-shaped notches are provided at the two ends of the embedded plates, which are staggered vertically. Positioning plate slots are provided on the four corner sidewalls of the embedded plates. The multiple positioning plates are distributed on both ends of the embedded plates. The positioning plates are connected in series with the adjacent embedded plates through the positioning plate slots. The positioning plates are slidably connected to the rail groove on the nearest side.

[0024] The resulting technical effect is that the embedded panels are connected vertically and effectively positioned by the positioning plates on both sides. The U-shaped notch increases the contact area between the concrete and the component, resulting in better adhesion between the concrete and the steel plate, thereby improving the overall load-bearing performance of the wall.

[0025] Preferably, the inner panel is provided with multiple rows of connecting holes, and the horizontal tie rod passes through the connecting holes and is fixedly connected to the inner panel by a nut.

[0026] The resulting technical effect is that the non-removable wall formwork, together with the horizontal tie rods and embedded steel plate components, can form a three-dimensional force-bearing system, which strengthens the overall structure. Specifically, the spacing of the horizontal tie rods can be flexibly changed according to different structural design requirements, which reflects the advantages of prefabricated construction and facilitates flexible adjustment and precise positioning. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a steel-reinforced concrete shear wall with prefabricated, non-removable formwork according to the present invention. Figure 2 This is a schematic diagram of a prefabricated, non-removable formwork for a steel-reinforced concrete shear wall according to the present invention. Figure 3 This is a schematic diagram of the internal structure of a steel-reinforced concrete shear wall with prefabricated, non-removable formwork according to the present invention. Figure 4 This is a schematic diagram of an embedded steel plate assembly for a steel-reinforced concrete shear wall with prefabricated, non-removable template according to the present invention. Figure 5 This is a schematic diagram of the embedded panel structure of a steel-reinforced concrete shear wall with prefabricated, non-removable template according to the present invention. Figure 6 This is a partial schematic diagram of the cooperation between the end-side sealing plate and the embedded steel plate assembly of a steel-reinforced concrete shear wall with prefabricated, non-removable formwork according to this utility model: Figure 7 This is a schematic diagram of the main formwork steel plate structure of a steel-reinforced concrete shear wall with prefabricated, non-removable formwork according to the present invention. Figure 8 This is a schematic diagram of a transition plate structure for a steel-reinforced concrete shear wall with prefabricated, non-removable formwork, according to the present invention.

[0028] 1. Removable wall formwork, 11. Main formwork steel plate, 111. Tie bar hole, 12. End side sealing plate, 13. Tie bar, 14. Transition connecting plate, 15. Bolt hole, 16. Track groove, 2. Embedded steel plate assembly, 21. Embedded plate, 211. Positioning plate slot, 212. Connection hole, 213. U-shaped notch, 22. Positioning plate, 3. Horizontal tie bar, 4. Concrete filler. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] See appendix to this utility model Figures 1 to 8 According to an embodiment of the present invention, a steel-reinforced concrete shear wall with prefabricated, non-removable formwork is provided, comprising: a non-removable wall formwork 1, which is a modularly assembled rectangular cavity structure, and rail grooves 16 are provided on the two inner sidewalls near the edge of the non-removable wall formwork 1; the non-removable wall formwork does not need to be removed after the concrete is poured; during the use stage, it works together with the internal concrete to jointly bear the load, realizing the integration of formwork function and structural stress. Embedded steel plate component 2 is located in the cavity of the non-removable wall template 1 and is slidably connected to the two opposing track grooves; Horizontal tie rod 3 is placed horizontally in the cavity of the non-removable wall template 1 and its two ends are respectively fixedly connected to the embedded steel plate assembly 2 on the side. Concrete filler 4 is cast in place into the cavity of the non-removable wall formwork 1 and is integrally cured and formed with the embedded steel plate component 2 and the horizontal tie rod 3. In other embodiments, the non-removable wall template 1 includes a main formwork steel plate 11, end-side sealing plates 12, and tie bars 13. The main formwork steel plate 11, end-side sealing plates 12, and tie bars 13 are all prefabricated components that can be prefabricated in the factory according to the actual project dimensions to ensure accuracy and matching. Two sets of main formwork steel plates 11 are arranged in parallel and used as the two side plates of the non-removable wall template 1. Two sets of end-side sealing plates 12 are connected to both ends of the main formwork steel plate 11. The two sets of main formwork steel plates 11 and the two sets of end-side sealing plates 12 cooperate to form a rectangular cavity structure. Multiple tie bars 13 are arranged in parallel between the two sets of main formwork steel plates 11.

[0031] The main formwork steel plates on both sides are connected by tie bars. When the wall is subjected to pressure or shear force, the concrete tends to be crushed or expand laterally. The tie bars, through their lateral binding effect, form an effective "circumferential constraint" on the internal concrete, like putting tight hoops on it. This constraint makes the concrete less prone to sudden crushing under enormous pressure, allowing it to withstand greater deformation, thus significantly improving the wall's ductility. Ductility is a key ability of a structure to deform under accidental loads such as earthquakes without suddenly collapsing. When cracks appear in the wall, the tie bars can cross the cracks, limiting their width and propagation, maintaining the wall's integrity. Tie bars can resist smaller shear forces or unexpected actions perpendicular to the wall surface. Simultaneously, like pins, they help prevent slippage of the wall at horizontal joints.

[0032] In some other embodiments, a transition plate 14 is also included. The transition plate 14 is used to transitionally connect the main mold steel plate 11 and the end sealing plate 12. The transition plate 14 is located in the cavity of the wall-removable template 1 and is fixedly connected to the main mold steel plate 11 and the end sealing plate 12 by fasteners.

[0033] In some other specific embodiments, the transition plate 14 is a steel strip, and multiple bolt holes 15 are arranged side by side on the transition plate 14. Bolt holes 15 are also provided on the main mold steel plate 11 and the end sealing plate 12. The transition plate 14 is connected to the main mold steel plate 11 and the end sealing plate 12 by bolt fasteners.

[0034] In some other embodiments, the main mold steel plate 11 is provided with a plurality of tie rod holes 111, and the two ends of the tie rod 13 extend to the outside of the main mold steel plate 11 and are anchored by locking nuts.

[0035] In some other specific embodiments, the end-side sealing plate 12 is a side-mounted U-shaped structure plate, with the opening of the end-side sealing plate 12 facing the main mold steel plate 11, and the rail groove 16 is provided on the two inner side walls of the end-side sealing plate 12.

[0036] In other embodiments, the embedded steel plate assembly 2 includes multiple embedded plates 21 and multiple positioning plates 22. The embedded plates 21 are rectangular plates, and the multiple embedded plates 21 are spliced ​​vertically. The two sides of the embedded plates 21 are staggered with multiple U-shaped notches 213. During concrete pouring, concrete flows into the U-shaped notches to increase the contact area between the embedded steel plate assembly on both sides and the concrete, improve its adhesion to the concrete, and effectively fix the embedded steel plate assembly. Under seismic action, it can prevent relative slippage. This can improve the overall structural stability of the concrete wall and effectively improve the structural stability and strength of the shear wall. The four corner sidewalls of the embedded plates 21 are provided with positioning plate slots 211. Multiple positioning plates 22 are distributed on both ends of the embedded plates 21. The positioning plates 22 are connected in series with the adjacent embedded plates 21 through the positioning plate slots 211. The positioning plates 22 are slidably connected to the rail groove 16 on the nearest side.

[0037] In some other embodiments, the inner panel 21 is provided with multiple rows of connecting holes 212, and the horizontal tie rod 3 passes through the connecting holes 212 and is fixedly connected to the inner panel 21 by nuts. The spacing of the horizontal tie rod can be flexibly changed according to different structural design requirements, and the overall structure can be precisely connected, reflecting the advantages of assembly, and facilitating flexible adjustment and precise positioning.

[0038] During actual construction: First, the end-side sealing plates 12 (U-shaped steel plates) were hoisted and positioned. Using a tower crane and specialized hoisting lugs, the prefabricated U-shaped steel plates on both sides were smoothly transported to the designed positions. Subsequently, a total station was used to precisely measure and adjust the verticality and spacing between the U-shaped steel plates to ensure their positioning accuracy met design requirements. Before final fixing, temporary steel pipe supports were used to reliably support and reinforce the U-shaped steel plates, providing a stable foundation for subsequent component installation.

[0039] Next, the main formwork steel plate 11 is installed and the steel frame is formed. Two main formwork steel plates 11, prefabricated in the factory according to actual dimensions, are hoisted into place, ensuring accurate alignment with the preset installation positions on the U-shaped steel plate. Subsequently, tie bars 13 are inserted through the tie bar holes 111 in the U-shaped steel plate and anchored at the ends using lock nuts. Through the effective connection of the tie bars, the U-shaped steel plate and the main formwork steel plate together form an integral steel frame. This frame serves as the support system for the non-removable wall formwork during the construction phase, achieving the integration of formwork function and scaffolding function.

[0040] Further steps involve installing the embedded steel plate assembly 2 and forming the reinforcing steel skeleton. The embedded steel plate assembly 2 is smoothly slid into the designed position along the pre-set track groove 16 on the inner side of the U-shaped steel plate, and is precisely positioned and fixed by the positioning plate 22. Subsequently, the horizontal tie rods 3 are inserted into the connecting holes on the embedded steel plate assembly, and their two ends are firmly connected to the embedded steel plate assembly by locking nuts, forming a reinforcing steel skeleton system with excellent spatial stress performance. This prefabricated reinforcement process effectively ensures the accuracy of the reinforcement spacing, enhances the overall integrity of the skeleton, and lays a good foundation for the coordinated stress distribution after concrete pouring.

[0041] Finally, concrete filler is poured to form the wall.

[0042] The technical advantages of this utility model are reflected in three dimensions: efficiency, performance, and economy. Efficiency and Industrialization Advantages: On-site "dry" assembly operations improve assembly efficiency by 2-3 times compared to traditional processes, while reducing labor costs by more than 30%. This technology is particularly suitable for modern high-rise and super high-rise building projects with tight schedules, demonstrating its superior level of industrialized construction.

[0043] Performance and durability advantages: The core U-shaped steel plates undergo long-term anti-corrosion treatment, with a designed service life of no less than 50 years, thereby improving the durability of the entire shear wall structure by 15%-20%. This technology not only meets the requirements for long-term safe use of the structure, but its excellent green performance can also earn the project extra points in green building evaluation standards (such as LEED and GBL).

[0044] Economic and applicability advantages: This system eliminates the need for dismantling, cleaning, and related costs associated with traditional formwork. On-site operation primarily uses bolt connections, eliminating the need for specialized welders and shortening the training period for ordinary workers by 50%, thus lowering the technical threshold and labor costs. Its modular design is adaptable to over 80% of the shear wall dimensions in civil buildings, demonstrating strong engineering practicality and broad market potential.

[0045] In summary, this utility model successfully achieves the integrated design goals of "high construction efficiency, reliable structure, and green environmental protection," providing a revolutionary solution for steel-reinforced concrete shear wall structures. It has extremely broad prospects for promotion and application in fields such as new high-rise buildings, seismic reinforcement, and industrialized housing.

[0046] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork, characterized in that, include: The wall template (1) is a modular rectangular cavity structure. The two inner sidewalls of the wall template (1) near the edge are provided with rail grooves (16). An embedded steel plate assembly (2) is located in the cavity of the non-removable wall template (1) and is slidably connected to the two opposing rail grooves. Horizontal tie rod (3), the horizontal tie rod (3) is placed horizontally in the cavity of the wall template (1) and its two ends are respectively fixedly connected to the embedded steel plate assembly (2) on the side near the wall; Concrete filler (4) is cast in place in the cavity of the non-removable wall template (1) and is integrally cured and formed with the embedded steel plate assembly (2) and the horizontal tie rod (3).

2. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 1, characterized in that, The wall template (1) that does not need to be dismantled includes a main formwork steel plate (11), end sealing plates (12) and tie bars (13). The main formwork steel plate (11), end sealing plates (12) and tie bars (13) are all prefabricated. Two sets of the main formwork steel plate (11) are arranged in parallel and are used as the two side plates of the wall template (1). There are two sets of end sealing plates (12) and they are connected to the two ends of the main formwork steel plate (11). The two sets of the main formwork steel plate (11) and the two sets of end sealing plates (12) cooperate to form a rectangular cavity structure. There are multiple tie bars (13) arranged in parallel between the two sets of the main formwork steel plate (11).

3. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 2, characterized in that, It also includes a transition plate (14), which is used to transitionally connect the main mold steel plate (11) and the end sealing plate (12). The transition plate (14) is located in the cavity of the wall template (1) and is fixedly connected to the main mold steel plate (11) and the end sealing plate (12) by fasteners.

4. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 3, characterized in that, The transition plate (14) is a steel strip. Multiple bolt holes (15) are arranged side by side on the transition plate (14). Bolt holes (15) are also provided on the main mold steel plate (11) and the end sealing plate (12). The transition plate (14) is connected to the main mold steel plate (11) and the end sealing plate (12) respectively by bolt fasteners.

5. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 2, characterized in that, The main mold steel plate (11) is provided with a plurality of tie rod holes (111), and the two ends of the tie rod (13) extend to the outside of the main mold steel plate (11) and are anchored by locking nuts.

6. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 2, characterized in that, The end-side sealing plate (12) is a side-mounted U-shaped structure plate. The opening of the end-side sealing plate (12) is arranged facing the main mold steel plate (11) corresponding to the U-shaped opening. The rail groove (16) is provided on the two inner side walls of the end-side sealing plate (12).

7. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 1, characterized in that, The embedded steel plate assembly (2) includes multiple embedded plates (21) and multiple positioning plates (22). The embedded plate (21) is a rectangular plate. Multiple U-shaped notches (213) are provided at the two ends of the embedded plate (21) with the upper and lower parts staggered. Positioning plate slots (211) are provided on the four corner sidewalls of the embedded plate (21). Multiple positioning plates (22) are distributed on both ends of the embedded plate (21). The positioning plates (22) are connected in series with the adjacent embedded plates (21) through the positioning plate slots (211). The positioning plates (22) are slidably connected to the rail groove (16) on the near side.

8. A steel-reinforced concrete shear wall with prefabricated, non-removable formwork as described in claim 7, characterized in that, The inner panel (21) is provided with multiple rows of connecting holes (212), and the horizontal tie rod (3) passes through the connecting holes (212) and is fixedly connected to the inner panel (21) by nuts.

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