Steel mesh non-dismantling formwork prefabricating unit
By adding a third steel bar welded mesh and a buffer layer to the prefabricated unit, the problem of displacement or narrowing of the insulation module during the pouring process is solved, and the insulation effect and lateral force resistance of the prefabricated unit are improved.
Patent Information
- Application Number
- CN202420895429.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The insulation module of existing prefabricated units is easily displaced or narrowed during the pouring process, affecting the insulation effect of the wall, and the single-layer steel bar welded mesh cannot meet the reinforcement rate and lateral force resistance requirements of complex buildings.
A third steel bar welded mesh is added to the prefabricated unit, the first and second steel bar welded mesh are tied through the abdominal ribs, and a buffer layer is provided between the insulation module and the third steel bar welded mesh. The deformation of the castable material on the insulation module is reduced and the overall reinforcement rate is enhanced.
Effectively avoid displacement or narrowing of the insulation module, ensure the insulation effect of the prefabricated unit, and improve the resistance to lateral force.
Smart Images
Figure CN223119303U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building construction, and particularly relates to a prefabricated unit with a steel mesh formwork that does not need to be removed. Background Art
[0002] In prefabricated buildings, building frames and fittings are prefabricated in a factory in advance, and then assembled and installed on site, reducing the amount of on-site work, improving construction efficiency, and greatly shortening the construction period.
[0003] Among them, the wall of a prefabricated building is generally formed by preparing a frame formwork for the wall in a factory to form a prefabricated unit, then transporting the prefabricated unit to the construction site and fixing it to the foundation, and finally pouring concrete into the pouring chamber of the prefabricated unit on site.
[0004] However, the current prefabricated unit needs to set up a pouring formwork and a thermal insulation module together to form a pouring chamber. After the concrete solidifies, the pouring formwork needs to be removed, which increases the amount of on-site work. At the same time, during the pouring process, due to the extrusion of the pouring material on the thermal insulation module, the thermal insulation module may shift or become narrower, thus affecting the thermal insulation effect of the wall.
[0005] Moreover, when the building structure is complex, due to the need for bearing capacity, the cross-sectional thickness of the concrete will increase, and a single-layer steel bar welded mesh cannot meet the requirements of the reinforcement ratio and lateral force resistance. Summary of the Utility Model
[0006] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a prefabricated unit with a steel mesh formwork that does not need to be removed. By adding a third steel bar welded mesh, the overall reinforcement ratio of the prefabricated unit is improved, and with the restraint of the third steel bar welded mesh, the deformation amount generated by the pouring material on the thermal insulation module is reduced, thereby avoiding the displacement or narrowing of the thermal insulation module and ensuring the thermal insulation effect of the prefabricated unit.
[0007] The specific technical solution adopted by the utility model is as follows:
[0008] A prefabricated unit with a steel mesh formwork that does not need to be removed includes a first steel bar welded mesh, a second steel bar welded mesh, and a thermal insulation module located between the first steel bar welded mesh and the second steel bar welded mesh. The first steel bar welded mesh and the second steel bar welded mesh are fixed by stirrups passing through the thermal insulation module. Mesh formworks are respectively covered on the outer sides of the first steel bar welded mesh and the second steel bar welded mesh. The distance between the thermal insulation module and the first steel bar welded mesh is less than the distance between the thermal insulation module and the second steel bar welded mesh. The third steel bar welded mesh is located between the thermal insulation module and the second steel bar welded mesh, and the distance between the third steel bar welded mesh and the second steel bar welded mesh is greater than the distance between the thermal insulation module and the third steel bar welded mesh.
[0009] The abdominal bars are arranged in multiple rows, and each row of abdominal bars has at least two abdominal bars crossing in an X shape. The two abdominal bars respectively pass through the third steel bar welded mesh and are welded to the third steel bar welded mesh.
[0010] The abdominal bars are arranged in an inclined direction along the vertical plane.
[0011] The steel bars used for the first steel bar welded mesh, the second steel bar welded mesh and the third steel bar welded mesh have a diameter of 4-6 mm.
[0012] The distance between the thermal insulation module and the third steel bar welded mesh is 5-30 mm, and the distance between the thermal insulation module and the first steel bar welded mesh is 50-100 mm.
[0013] The beneficial effects of the present utility model are as follows:
[0014] In the present utility model, a third steel bar welded mesh is additionally provided between the first steel bar welded mesh and the second steel bar welded mesh. Since the thermal insulation module mostly uses polystyrene boards, its own structural strength is low and it is easily squeezed by the castable and deformed. Therefore, the third steel bar welded mesh is provided. The main load-bearing structure layer is between the third steel bar welded mesh and the second steel bar welded mesh. After pouring the castable into the pouring cavity of the main load-bearing structure layer, with the restraint of the third steel bar welded mesh, it is avoided that the castable rushes towards the thermal insulation module at one time, thereby reducing the deformation amount generated by the castable on the thermal insulation module, and further avoiding the displacement or being squeezed and narrowed of the thermal insulation module, and ensuring the thermal insulation effect of the precast unit. Description of the Drawings
[0015] Figure 1 is a structural schematic diagram of the present utility model;
[0016] In the drawings, 1, the first steel bar welded mesh; 2, the second steel bar welded mesh; 3, the thermal insulation module; 4, the abdominal bar; 5, the mesh formwork; 6, the third steel bar welded mesh. Specific Embodiments
[0017] The following further describes the present utility model in conjunction with the drawings and specific embodiments:
[0018] Specific embodiments are as follows Figure 1As shown, the utility model provides a steel mesh non-disassembly template prefabricated unit, including a first steel mesh 1 and a second steel mesh 2 symmetrically arranged on both sides, and an insulation module 3 located between the first steel mesh 1 and the second steel mesh 2, the first steel mesh 1 and the second steel mesh 2 are tied and fixed by means of web reinforcement 4 passing through the insulation module 3, the outer sides of the first steel mesh 1 and the second steel mesh 2 are respectively covered with mesh templates 5, the distance between the insulation module 3 and the first steel mesh 1 is smaller than the distance between the insulation module 3 and the second steel mesh 2, the third steel mesh 6 is located between the insulation module 3 and the second steel mesh 2, and the distance between the third steel mesh 6 and the second steel mesh 2 is greater than the distance between the insulation module 3 and the third steel mesh 6.
[0019] The current prefabricated unit needs to set up a casting template and an insulation module 3 to form a casting chamber together. The casting template needs to be removed after the concrete solidifies, which increases the construction workload on site. At the same time, during the casting process, the insulation module 3 is squeezed by the casting material, which may cause the insulation module 3 to shift or become narrower, thereby affecting the insulation effect of the wall.
[0020] Therefore, the utility model covers the outer sides of the first steel bar welded mesh 1 and the second steel bar welded mesh 2 with a mesh template 5 respectively, the mesh template 5 is made of metal material, the surface of the mesh template 5 is provided with a galvanized layer, the double-sided weight of the galvanized layer is ≥120g / m2, the hole width of the mesh template 5 is 3-5mm, the hole length is 6-8mm, and the particle size of the coarse aggregate is 5-10mm, so the coarse aggregate in the castable can block the holes of the mesh template 5, and at the same time, the castable itself has a certain viscosity, so that it will not flow out in large quantities along the gaps of the mesh template 5, and the gushing castable forms a rough surface on the outer surface of the mesh template 5, and a finishing surface is formed in the later stage by spraying, and it is used for clamping and fixing insulation. At the same time, due to the existence of the mesh template 5, it is convenient to level the wall, so there is no need to remove the mesh template 5 after concrete pouring.
[0021] At the same time, the utility model adds a third steel welded mesh 6 between the first steel welded mesh 1 and the second steel welded mesh 2. Since the insulation module 3 mostly adopts polystyrene board, its own structural strength is low and it is easy to be squeezed and deformed by the castable. Therefore, the third steel welded mesh 6 is provided. The third steel welded mesh 6 and the second steel welded mesh 2 are the main load-bearing structural layer. After the castable is poured into the casting cavity of the main load-bearing structural layer, the castable is prevented from rushing to the insulation module 3 at one time with the help of the restraint of the third steel welded mesh 6, thereby reducing the deformation of the insulation module 3 caused by the castable, thereby preventing the insulation module 3 from shifting or narrowing, and ensuring the insulation effect of the prefabricated unit.
[0022] In addition, by providing the third steel welded mesh 6, the overall reinforcement ratio of the prefabricated unit can be increased to improve the lateral resistance of the prefabricated unit.
[0023] The abdominal bars 4 are arranged in multiple rows in a row. Each group of abdominal bars 4 has at least two abdominal bars 4 crossing in an X shape. The two abdominal bars 4 respectively pass through the third welded steel bar mesh 6 and are welded to the third welded steel bar mesh 6. The tensile strength of the abdominal bars 4 is greater than 400 N / mm2, and its diameter is 6 mm. The abdominal bars 4 are evenly arranged in multiple rows longitudinally. Each row of abdominal bars 4 is evenly arranged in multiple groups transversely. The intersection points of each group of abdominal bars 4 are located within the insulation module 3, so as to strengthen the structural strength and fixing strength of the insulation module 3, ensure that the insulation module 3 does not shift after being extruded by the castable, and about 70 abdominal bars 4 are arranged per square meter of the precast unit.
[0024] The abdominal bars 4 are arranged in an inclined direction along the vertical plane. The vertical planes where each group of abdominal bars 4 are located are parallel to each other. The ends of the abdominal bars 4 should not exceed the outer surface of the mesh formwork 5.
[0025] The steel bars used for the first welded steel bar mesh 1, the second welded steel bar mesh 2 and the third welded steel bar mesh 6 have a diameter of 4 - 6 mm. The diameter d of the steel bar is 4 - 6 mm. Therefore, the thickness of the welded steel bar mesh is 2d. The vertical steel bars of the first welded steel bar mesh 1 and the third welded steel bar mesh 6 on both sides of the insulation module 3 face the side of the insulation module 3, and the horizontal steel bars face the outside. When pouring the castable, the horizontal steel bars will hinder the pouring from top to bottom, thus changing the flow direction of the castable and making the castable flow towards the insulation module 3, which may cause the insulation module 3 to shift. Therefore, the horizontal steel bars of the welded steel bar mesh face the outside of the insulation module 3.
[0026] The distance between the insulation module 3 and the third welded steel bar mesh 6 is 5 - 30 mm. The distance between the insulation module 3 and the first welded steel bar mesh 1 is 50 - 100 mm. The gap between the insulation module 3 and the third welded steel bar mesh 6 forms a buffer layer. The castable in the main load-bearing structure layer overflows into the buffer layer, thus preventing the overflowing castable from directly extruding the insulation module 3 and avoiding the insulation module 3 from shifting or being greatly extruded and narrowed. A gap of 50 - 100 mm needs to be reserved between the insulation module 3 and the first welded steel bar mesh 1 as a protective structure layer.
Claims
1. A steel mesh non-disassembly template prefabricated unit, comprising a first steel mesh (1), a second steel mesh (2), and a heat preservation module (3) located between the first steel mesh (1) and the second steel mesh (2), wherein the first steel mesh (1) and the second steel mesh (2) are tied and fixed by means of web reinforcement (4) passing through the heat preservation module (3), and the outer sides of the first steel mesh (1) and the second steel mesh (2) are respectively covered with a mesh template (5), characterized in that: The distance between the thermal insulation module (3) and the first welded steel bar mesh (1) is less than the distance between the thermal insulation module (3) and the second welded steel bar mesh (2). The third welded steel bar mesh (6) is located between the thermal insulation module (3) and the second welded steel bar mesh (2). The distance between the third welded steel bar mesh (6) and the second welded steel bar mesh (2) is greater than the distance between the thermal insulation module (3) and the third welded steel bar mesh (6). Multiple groups of web bars (4) are arranged in rows. Each group of web bars (4) has at least two web bars (4) crossing in an x-shape. The two web bars (4) respectively pass through the third welded steel bar mesh (6) and are welded to the third welded steel bar mesh (6). The intersection point of each group of web bars (4) is located within the thermal insulation module (3).
2. The precast unit of the steel mesh non-dismantling formwork according to claim 1, wherein, The web bars (4) are arranged in an inclined direction along the vertical plane.
3. A prefabricated unit for a steel mesh formwork without demolition, according to claim 1, characterized in that, The steel bars used for the first welded steel bar mesh (1), the second welded steel bar mesh (2), and the third welded steel bar mesh (6) have a diameter of 4 - 6 mm.
4. A prefabricated unit of a steel mesh non-dismantling formwork according to claim 1, characterized in that, The distance between the thermal insulation module (3) and the third welded steel bar mesh (6) is 5 - 30 mm, and the spacing between the thermal insulation module (3) and the first welded steel bar mesh (1) is 50 - 100 mm.