Shear wall root formwork system

Abstract

A shear wall root formwork system comprises a formwork, a batten, a split screw, a main keel double-steel pipe and a square steel pipe, the split screw is vertically welded to the lower portion of the square steel pipe to form a fixing device, a split screw sleeve is reserved at the top of a lower-layer shear wall, and the split screw in the fixing device penetrates through the split screw sleeve reserved on the lower-layer shear wall. A square steel pipe in the fixing device is vertical and tightly attached to an upper-layer formwork, the end, away from the square steel pipe, of a split screw in the fixing device is connected with an E-shaped clamp and a nut to fasten an outer formwork at the root of an upper-layer shear wall, the formwork of the upper-layer shear wall, a batten and a main keel double-steel pipe are connected and fastened through the split screw, and the split screw is connected with the E-shaped clamp and the nut. And the distance between the templates is adjusted through the nuts. According to the utility model, the fixing device is adopted to solve the problem of formwork expansion at the root of the cast-in-place outer wall, so that the construction quality is ensured, the construction period consumed by chiseling concrete is saved, the management cost is reduced, and good economic benefits are obtained.

Description

Technical Field

[0001] This utility model relates to the field of main structure construction systems, and in particular to a shear wall root formwork system. Background Technology

[0002] In the field of engineering construction, wooden formwork is required for the construction of cast-in-place concrete structures. When the structure type is shear wall, the concrete of two adjacent layers cannot be poured continuously. To ensure the flatness of the base of the exterior wall, the formwork at the base of the shear wall is usually reinforced by wrapping it downwards by 100mm. However, the formwork still deforms during concrete pouring, causing problems such as formwork bulging, resulting in an increase in the thickness of the shear wall and the concrete surface flatness not meeting the requirements. Summary of the Invention

[0003] This utility model aims to address the shortcomings of existing technologies by providing a shear wall root formwork system.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] A shear wall root formwork system includes formwork, timber, tie rods, main keel double steel pipes, and square steel pipes. The tie rods are vertically welded to the lower part of the square steel pipes to form a fixing device. Tie rod sleeves are reserved at the top of the lower shear wall. The tie rods in the fixing device pass through the reserved tie rod sleeves in the lower shear wall. The square steel pipes in the fixing device are vertical and close to the upper formwork. The end of the tie rods in the fixing device away from the square steel pipe is connected to a U-shaped clamp and a nut to fasten the outer formwork at the root of the upper shear wall. The formwork, timber, and main keel double steel pipes of the upper shear wall are connected and fastened by tie rods. U-shaped clamps and nuts are connected to the tie rods, and the spacing of the formwork is adjusted by the nuts.

[0006] The overlap between the square steel pipe and the upper template shall not be less than 100mm.

[0007] The timber mentioned is the secondary joists of the floor slab, and the timber size is 40mm×90mm.

[0008] The diameter of the main keel double steel pipe is 48.3mm.

[0009] The square steel pipe is 500mm long.

[0010] The length of the pull screw is 300mm.

[0011] The beneficial effects of this utility model are: This utility model uses a fixing device to solve the problem of formwork bulging at the base of cast-in-place exterior walls, ensuring construction quality, saving the construction period spent on chiseling concrete, reducing management costs, and achieving good economic benefits. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the fixing device structure of this utility model;

[0014] In the diagram: 1-Formwork; 2-Timber; 3-Tie rod; 4-U-shaped clamp; 5-Nut; 6-Main keel double steel pipe; 7-Square steel pipe;

[0015] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] like Figures 1-2 As shown, a shear wall root formwork system includes formwork 1, timber 2, tie rods 3, main keel double steel pipes 6, and square steel pipes 7. The tie rods 3 are vertically welded to the lower part of the square steel pipes 7 to form a fixing device. Tie rod sleeves are reserved at the top of the lower shear wall. The tie rods 3 in the fixing device pass through the reserved tie rod sleeves on the lower shear wall. The square steel pipes 7 in the fixing device are vertical and close to the upper formwork 1. The end of the tie rods 3 in the fixing device away from the square steel pipe 7 is connected to a U-shaped clip 4 and a nut 5 to fasten the outer formwork at the root of the upper shear wall. The formwork 1, timber 2, and main keel double steel pipes 6 of the upper shear wall are connected and fastened by the tie rods 3. The U-shaped clips 4 and nuts 5 are connected to the tie rods 3, and the spacing of the formwork 1 is adjusted by the nuts 5.

[0018] The overlap between the square steel pipe 7 and the upper template 1 shall not be less than 100mm.

[0019] The aforementioned timber slab 2 is a secondary joist for the floor slab, and the specifications of timber slab 2 are 40mm×90mm.

[0020] The diameter of the main keel double steel pipe 6 is 48.3mm.

[0021] The square steel pipe 7 has a length of 500mm.

[0022] The length of the pull screw 3 is 300mm.

[0023] When applying, (1) first make the fixing device: a. Determine the length of square steel pipe 7 according to the position of the tie rod sleeve of the lower outer wall. The shear wall thickness of this project is 200mm, the floor slab 8 thickness is 100mm, the template 1 thickness is 15mm, the secondary keel of the floor slab is 40x90mm timber 2, the main keel is double steel pipe with a diameter of 48.3mm, and the tie rod sleeve of the lower outer wall is 200mm away from the bottom main keel of the floor slab. Therefore, the square steel pipe 7 with a length of 500mm and the tie rod 3 with a length of 300mm are selected.

[0024] b. Ensure that the tie rod 3 and the square steel pipe 7 are perpendicular to each other, and construct a fixing device by welding, such as... Figure 2 As shown;

[0025] (2) Concrete exterior wall formwork installation: Before installing exterior wall formwork 1, promptly mark the lines, cut and remove weak concrete layers, and clean the debris inside the wall columns with a high-pressure air gun. First install one side of formwork 1, insert the tie rods 3, and then install the other side of formwork 1. Install the inner formwork first and then the outer formwork to ensure the overall stability of the formwork system. After the wall formwork 1 panel is in place, tighten it with tie bolts 3. The tie rods 3 should be installed while the timber 2 is installed on formwork 1. The bottom three rows of tie rods 3 are fixed with double nuts 5. The tie rod holes on both sides of the shear wall formwork 1 should be aligned, and the tie bolt holes should be straight and opposite. The tie rods 3 should not be pulled at an angle or forced. After the formwork 1 is erected, the top of formwork 1 should be checked with a string line, and the verticality should be checked with a plumb line. The gap at the bottom of template 1 should be sealed with wooden strips or sponge strips, or leveled with mortar. It is important to avoid extending it into the concrete wall. To prevent misalignment at the joint between upper and lower layers, the external wall template 1 should be supported and wrapped downwards by at least 100mm.

[0026] (3) Installation of fixing device: The installation process is carried out by two workers. After the outer wall formwork 1 is installed, one worker passes the tie rod 3 in the fixing device through the reserved sleeve of the lower layer from the outside of the outer wall formwork 1, and ensures that the square steel pipe 7 is vertical and close to the upper formwork 1. The other worker tightens and fixes the tie rod 3 inside the wall by using the nut 5 and the mountain-shaped clip 4.

[0027] (4) Pouring concrete: Before pouring concrete into the wall, pour a 50mm thick layer of mortar of the same grade evenly at the bottom. Check the axial position, cross-sectional dimensions, elevation, verticality, support firmness and tightness of the joints of the formwork 1. Ensure that the debris inside the formwork 1 and the oil stains on the reinforcing bars have been cleaned. Check the reinforcing bar protective layer, embedded parts and reserved holes. Do a good job of accepting the formwork and reinforcing bars.

[0028] (5) Removal of fixing devices: After the concrete strength of the exterior wall reaches the required level, remove the fixing devices, collect and organize them, and reuse them on the upper floor; for the upper exterior wall formwork system, first remove the diagonal braces, then remove the tie rods 3 and other accessories that pass through the wall, and then use a crowbar to pry the formwork 1 so that the formwork 1 is separated from the wall, and then the formwork 1 can be hoisted away. If the formwork 1 is adhered or bonded to the concrete wall and cannot be separated, the bottom of the formwork 1 can be pried with a crowbar, but the formwork must not be pried at the top of the wall.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A shear wall root formwork system, characterized in that, The system includes template (1), timber (2), tie rods (3), main keel double steel pipe (6) and square steel pipe (7). Tie rods (3) are vertically welded to the lower part of square steel pipe (7) to form a fixing device. Tie rod sleeves are reserved at the top of the lower shear wall. Tie rods (3) in the fixing device pass through the tie rod sleeves reserved in the lower shear wall. Square steel pipe (7) in the fixing device is vertical and close to the upper template (1). The end of tie rod (3) in the fixing device away from square steel pipe (7) is connected to a mountain-shaped clip (4) and a nut (5) to fasten the outer template at the root of the upper shear wall. The template (1), timber (2) and main keel double steel pipe (6) of the upper shear wall are connected and fastened by tie rods (3). Mountain-shaped clips (4) and nuts (5) are connected to tie rods (3), and the spacing of templates (1) is adjusted by nuts (5).

2. The shear wall root formwork system according to claim 1, characterized in that, The overlap between the square steel pipe (7) and the upper template (1) shall not be less than 100mm.

3. The shear wall root formwork system according to claim 1, characterized in that, The timber (2) mentioned above is the secondary joist of the floor slab, and the specifications of the timber (2) are 40mm×90mm.

4. A shear wall root formwork system according to claim 1, characterized in that, The diameter of the main keel double steel pipe (6) is 48.3mm.

5. A shear wall root formwork system according to claim 1, characterized in that, The square steel pipe (7) is 500mm long.

6. A shear wall root formwork system according to claim 1, characterized in that, The length of the pull screw (3) is 300mm.

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