Formwork supporting system for deformation joint of shear wall

Abstract

The utility model discloses a shear wall deformation joint formwork system, which is characterized in that a shear wall pouring area is formed between an inner formwork and an outer formwork, the inner formwork is provided with a formwork support, the outer formwork is fixed into a large formwork through a fixing piece, the outer formwork is hoisted to a preset position, and the inner formwork and the outer formwork are fixed through a connecting piece. According to the shear wall deformation joint formwork supporting system, one side of the inner formwork is used for supporting the formwork, after the outer formwork is fixed into a large formwork and integrally hoisted in place through a crane, the outer formwork and the inner formwork are fixed together through the split bolts, and therefore the outer formwork is supported.

Description

Technical Field

[0001] This utility model relates to a formwork support system for expansion joints in shear walls. Background Technology

[0002] Framed concrete structures expand or contract under the influence of external factors such as temperature and humidity changes. When the deformation reaches a certain amount, the concrete structure cracks and fails. To prevent excessive deformation, expansion joints are needed. These joints divide the structure into two independent parts, each capable of independent expansion or contraction to control deformation and prevent cracking. However, the expansion joint space in framed shear walls is small, and there is insufficient operating space for external formwork construction, making conventional formwork methods unsuitable. Utility Model Content

[0003] To address the above shortcomings, the purpose of this utility model is to provide a formwork support system for expansion joints in shear walls of frame structures. This utility model primarily addresses the lack of construction operation space and support for the outer formwork. By supporting the formwork on one side of the inner formwork, and then hoisting the outer formwork into place as a large formwork assembly using a crane, the outer and inner formwork are then secured together with numerous tie bolts, thereby solving the aforementioned problems.

[0004] Therefore, this utility model provides a shear wall expansion joint formwork system, in which an inner formwork and an outer formwork form a shear wall casting area. The inner formwork is equipped with formwork supports, and the outer formwork is fixed into a large formwork by fasteners. The outer formwork is hoisted to a predetermined position, and the inner and outer formwork are fixed by connectors.

[0005] Furthermore, the fastener includes a first back rib and a second back rib fixed to the outer template, with the second back rib and the first back rib arranged in a cross shape.

[0006] Furthermore, the first back rib is made of square profile or tube and is fixed longitudinally to the surface of the template, while the second back rib is made of round profile or tube and is arranged laterally and fixed to the first back rib or template.

[0007] Furthermore, the connector includes tie bolts, and the outer template and the inner template are fixed by a plurality of tie bolts.

[0008] Furthermore, the two second back ribs are arranged adjacently to form a group, the tie bolt passes between the two back ribs arranged in the group, and the two wings of the tie nut cooperate with the two second back ribs arranged in the group to fix the tie bolt. The tie nut is provided with a limiting groove that cooperates with the second back rib.

[0009] Furthermore, the second back rib is connected to the outer template by multiple fixing bolts. The fixing bolts are inserted between the grouped second back ribs, and the two wings of the tie nut are provided on the two second back ribs to cooperate with the fixing bolts to fix the second back ribs and the outer template.

[0010] Furthermore, the tie nut is welded and fixed to the second back rib, the tie bolt includes a limiting part that mates with the inner surface of the outer template, the inner template is provided with a threaded hole that mates with the tie bolt, and the position of the bolt head of the tie bolt and the limiting piece limits the distance between the outer template and the inner template.

[0011] Furthermore, the limiting part includes: a limiting piece fixed on the tie rod; or the tie rod is a stepped screw, the stepped surface of the stepped screw forming the limiting part; or one end of the tie rod is provided with a threaded groove, the threaded groove cooperates with the screw rod, the limiting piece is fixed in the middle of the screw rod, one end of the screw rod cooperates with the threaded groove, and the other end cooperates with the tie nut.

[0012] Furthermore, it also includes positioning short bars, which are embedded in the concrete and on the outside of the outer formwork.

[0013] Furthermore, the positioning short rib is also pre-embedded on the inner side of the outer template at a distance from the outer template surface and is provided with a predetermined distance. The positioning short rib on the inner side fixes the inclined metal piece to guide the outer template to be installed in the predetermined position.

[0014] The beneficial technical effects of this utility model are as follows:

[0015] (1) The shear wall expansion joint support system of this utility model supports the formwork on one side of the inner formwork. After the outer formwork is fixed into a large formwork and lifted into place by a crane, the outer formwork and the inner formwork are fixed together with tie bolts, thereby realizing the support of the outer formwork.

[0016] (2) In a specific embodiment of this utility model, by setting threaded holes in the inner template and setting limiting parts on the tie bolts, the distance between the inner template and the outer template is controlled by using the length between the limiting parts and the bolt heads of the tie bolts, thereby forming the required casting area. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the locations of expansion joints, shear walls, and internal and external formwork.

[0018] Figure 2 This is a schematic diagram of the outer surface of the outer template;

[0019] Figure 3 This is a schematic diagram showing the connection relationship between the tie nut and the second back rib.

[0020] Figure 4This is a schematic diagram of the limiting part and the template;

[0021] Figure 5 This is a schematic diagram showing the positional relationship between the outer formwork and the positioning short reinforcement.

[0022] Figure 6 This is a schematic diagram of the internal template support.

[0023] Explanation of reference numerals in the attached drawings: 1. Shear wall; 2. Expansion joint; 3. Inner formwork; 4. Outer formwork; 5. Diagonal brace; 6. First back rib; 7. Second back rib; 8. Tie bolt; 801. Bolt head; 802. Threaded rod; 803. Limiting plate; 804. Tie nut; 805. Threaded groove; 806. Limiting groove; 9. Lifting ring; 10. Positioning short bar; 11. Metal block; 12. Fixing bolt. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] Reference Figures 1 to 6 As shown, this utility model discloses a shear wall expansion joint formwork system. An inner formwork 3 and an outer formwork 4 form a shear wall casting area. The inner formwork 3 is equipped with formwork supports, and the outer formwork 4 is fixed into a large formwork structure by fasteners. The outer formwork 4 is hoisted to a predetermined position, and the inner formwork 3 and outer formwork 4 are fixed by connectors. (Refer to...) Figure 1 As shown, expansion joint 2 is located between two shear walls 1. The width of expansion joint 2 is generally tens to hundreds of millimeters. Formwork needs to be erected to pour concrete for the shear walls 1 on both sides of expansion joint 2. The inner formwork 3 and outer formwork 4 can be made of wood, steel, or aluminum. The inner formwork 3 can be erected in a conventional manner, such as... Figure 6 The diagonal bracing 5 is shown. The outer frame of the outer formwork 4 is formed by welding and fixing square steel pipes, as shown in the reference. Figure 2 As shown, the outer surface of the outer template 4 is fixed with a first back rib 6 and a second back rib 7. In this embodiment, the first back rib 6 is a square steel pipe, and the second back rib 7 is a round steel pipe. Of course, the square and round steel pipes can also be replaced with solid profiles. The square steel pipes are arranged at equal intervals longitudinally, and the round steel pipes are arranged in groups of two laterally. A certain distance is reserved between the two round steel pipes in the same group, and the groups are also equally spaced. When the outer template 4 is made of wood, the wood template can be nailed to the square steel pipes. If metal materials are used, welding can be used for fixing. The inner template 3 and the outer template 4 are fixed with tie bolts 8. (Refer to...) Figure 3As shown, the tie nut 804 is a mountain-shaped nut with limiting grooves 806 on both wings. The limiting grooves 806 mate with the round steel pipe, and the tie nut 804 is welded to the round steel pipe. During construction, the inner formwork 3 is installed first, and the reinforcing cage and outer formwork 4 are hoisted in. After the reinforcing cage and outer formwork 4 are in place, the threaded rod of the tie bolt 8 passes through the inner formwork 3, the reinforcing cage, and the outer formwork 4 and is threadedly connected to the tie nut 804. Because the space at the location of the expansion joint 2 is narrow, it is impossible to tighten the tie nut 804 from the outside. Therefore, the tie nut 804 is first welded to the second back rib 7, and the tie bolt 8 is tightened on one side of the inner formwork 3 to achieve the engagement between the tie bolt 8 and the tie nut 804. The tie bolt 8 mentioned above generally needs to be sleeved in a PVC plastic pipe to prevent the tie bolt 8 from becoming an integral part of the concrete after the shear wall 1 is poured, which would prevent the outer formwork 4 from being removed. To facilitate hoisting, two lifting rings 9 are installed on the upper side of the outer formwork 4.

[0026] In the above embodiments, reference is made to Figure 2 As shown, the second back rib 7 and the first back rib 6 can be fixed by welding. The second back rib 7 can also be connected to the outer template 4 by fixing bolts 12. The second back rib 7 and the outer template 4 are connected by multiple fixing bolts. The fixing bolts 12 are inserted between the grouped second back ribs 7. The two wings of the tie nut 804 are provided on the two second back ribs 7 and cooperate with the fixing bolts to fix the second back rib 7 and the outer template 4. A nut can be fixed to the outer surface of the outer template 4 by welding or other means. The other end of the fixing bolt 12 cooperates with the nut. Alternatively, a hole that does not penetrate the template can be drilled in the outer template 4 to cooperate with the other end of the fixing bolt 12. The hole does not penetrate the template in order to avoid the fixing bolt being poured together with the concrete, which would make demolding difficult.

[0027] In the above embodiments, in order to ensure that the pouring area formed between the inner formwork 3 and the outer formwork 4 meets the requirements, it is necessary to position the outer formwork 4, referring to... Figure 5As shown, positioning short bars 10 can be pre-embedded in the concrete on the lower side of the outer formwork 4. During hoisting, the outer formwork 4 is pried with a crowbar to bring it close to the positioning short bars 10 for positioning. To avoid difficulties during hoisting, positioning short bars 10 can be set on only one side of the outer or inner side of the outer formwork 4. During hoisting, the bottom surface of the outer formwork 4 is brought close to the positioning short bars 10 to achieve positioning. Another embodiment is that positioning short bars 10 are also pre-embedded on the inner side of the outer formwork 4 at a certain distance from the predetermined position, and an inclined metal plate or metal block 11 is welded on. During hoisting, the formwork can be hoisted between the corresponding two positioning short bars 10. Since the width between the inner and outer positioning short bars 10 is relatively large, hoisting is relatively easy. With the assistance of a crowbar, the outer formwork 4 is slid into the predetermined position along the inclined metal plate. The metal plate can be trapezoidal, and the upper base of the trapezoid can define the position of the outer formwork 4 with another positioning short bar 10. It should be noted that the outer positioning short ribs 10 will have a certain impact on the formwork removal. Therefore, the outer positioning short ribs 10 can be welded to a metal plate, with both ends of the metal plate extending beyond the expansion joint 2. Embedded parts are set in the concrete outside the expansion joint 2, and the two ends of the metal plate are detachably fixed to the embedded parts. The embedded parts can be bolts, and the metal plate is fixed to the embedded bolts with nuts. Before demolding, the metal plate and the outer positioning short ribs 10 are removed first to facilitate the removal of the outer formwork 4.

[0028] In the above embodiments, reference is made to Figure 4 As shown, the tie bolt 8 includes a limiting part that mates with the inner surface of the outer template 4. The inner template 3 has threaded holes that mate with the tie bolt 8. The positions of the bolt head 801 and the limiting piece 803 of the tie bolt 8 define the distance between the outer template 4 and the inner template 3. The function of this limiting part is to position the distance between the inner template 3 and the outer template 4 using the tie bolts 8 distributed throughout the inner template 3 and the outer template 4, thus preventing local deformation of the template from affecting concrete pouring. The limiting part can be set in several ways, including: First, a limiting piece 803 is fixed at a predetermined position from one end of the tie rod 802. The limiting piece 803 cannot pass through the hole on the outer template 4. Since the limiting piece 803 needs to be installed in the PVC pipe, its size should be appropriate and it should have sufficient strength. During installation, the tie bolt 8 is first screwed into the inner template 3 partially. After the reinforcing cage is placed, the tie bolt 8 is then screwed into the outer template 4 until the bolt head 801 of the tie bolt 8 contacts the surface of the inner template 3. At this point, the limiting piece 803 contacts the surface of the outer template 4. Second, the tie bolt 8 can also be... Figure 4The structure shown has a threaded groove 805 at one end of the tie bolt 8, which engages with the screw 802. A limiting piece 803 is fixed in the middle of the screw 802. One end of the bolt is threaded into the threaded groove 805, and the other end is threaded into the tie nut 804. This method can adapt to shear walls 1 of different widths by replacing different screws 802 and tie bolts 8, making it convenient for rotation. The third embodiment uses a stepped screw, and the stepped surface of the stepped screw forms the limiting part.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A formwork support system for shear wall expansion joints, characterized in that: A shear wall casting zone is formed between the inner and outer formwork. The inner formwork is equipped with formwork supports, and the outer formwork is fixed into a large formwork by fasteners. The outer formwork is hoisted to a predetermined position, and the inner and outer formwork are fixed by connectors. The fastener includes a first back rib and a second back rib that are fixed to the outer template, and the second back rib and the first back rib are arranged in a cross shape. The first back rib is made of square profile or tube and is fixed longitudinally to the surface of the template; the second back rib is made of round profile or tube and is set laterally and fixed to the first back rib or template. The connector includes tie bolts, and the outer template and the inner template are fixed by a plurality of tie bolts.

2. The shear wall expansion joint formwork system according to claim 1, characterized in that: Two second back ribs are arranged adjacently to form a group. The tie bolt passes between the two back ribs arranged in the group, and the two wings of the tie nut cooperate with the two second back ribs arranged in the group to fix the tie bolt. The tie nut is provided with a limiting groove that cooperates with the second back rib.

3. The shear wall expansion joint formwork system according to claim 2, characterized in that: The second back rib is connected to the outer template by multiple fixing bolts. The fixing bolts are inserted between the grouped second back ribs. The two wings of the tie nut are located on the two second back ribs and cooperate with the fixing bolts to fix the second back ribs and the outer template.

4. A shear wall expansion joint formwork system according to claim 2, characterized in that: The tie nut is welded and fixed to the second back rib. The tie bolt includes a limiting part that mates with the inner surface of the outer template. The inner template has a threaded hole that mates with the tie bolt. The position of the bolt head of the tie bolt and the limiting piece limits the distance between the outer template and the inner template.

5. A shear wall expansion joint formwork system according to claim 4, characterized in that: The limiting part includes: A limiting piece fixed to the tie rod; Alternatively, the tie bolt may be a stepped screw, wherein the stepped surface of the stepped screw forms the limiting portion; Alternatively, one end of the tie bolt may be provided with a threaded groove, which mates with the screw rod. A limiting piece is fixed in the middle of the screw rod, one end of the screw rod mates with the threaded groove, and the other end mates with the tie nut.

6. A shear wall expansion joint formwork system according to claim 5, characterized in that: It also includes positioning short bars, which are embedded in the concrete and on the outside of the outer formwork.

7. A shear wall expansion joint formwork system according to claim 6, characterized in that: The positioning short rib is also pre-embedded on the inner side of the outer template and has a predetermined distance from the surface of the outer template. The positioning short rib on the inner side fixes the inclined metal plate to guide the outer template to be installed in the predetermined position.

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