Structure of combined hollow column
By combining hollow column structures and utilizing a rectangular central steel frame assembly and a no-removal formwork design, the problems of heavy frame columns, complex processes, high costs, and poor overall load-bearing capacity were solved, achieving efficient production and low-cost manufacturing of building components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2026-03-06
AI Technical Summary
Existing frame column structures suffer from problems such as heavy weight, complex manufacturing process, high cost, and poor overall load-bearing capacity, making it difficult to achieve a high degree of industrialization and integration.
A rectangular central steel frame assembly is adopted, combined with the first and second composite columns and additional steel mesh. A formwork-free design is used, and the additional steel mesh is tied and fixed to the central steel frame assembly through staggered arrangement. Formwork-free is then poured on both sides to form a composite hollow column structure.
It achieves simplified process, improved production efficiency, significantly reduced weight of precast components, enhanced column rigidity, ensured surface roughness of composite surfaces, reduced cost, and facilitates construction and widespread application.
Smart Images
Figure CN223974795U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a structure of a combined hollow column, belonging to the field of hollow column technology. Background Technology
[0002] Prefabricated construction, simply put, is building houses like manufacturing cars. The basic components of the house—beams, slabs, columns, and walls—are prefabricated in a factory and then transported to the construction site for assembly. This represents the future direction of industrialized construction. Prefabricated concrete buildings are generally divided into two main categories based on structural type: frame structures and shear wall structures. In frame structures, the vertical load-bearing components are the frame columns, and the horizontal load-bearing components are the frame beams and floor slabs.
[0003] For frame columns, existing precast column structures include three types: solid columns, hollow columns, and hollow columns that do not require formwork removal. Specifically:
[0004] Precast solid columns: Using molds, reinforcing steel bars are poured together with concrete to form solid precast columns; the technical defects of this structure and process are: the components are heavy, and the transportation and installation costs are high; the reinforcing steel bars can only be connected by "sleeve grouting", which is costly and the quality is not easy to guarantee.
[0005] Precast hollow columns involve pouring concrete around the perimeter of the column, creating a cavity in the center. The reinforcing steel bars are then poured together with the surrounding concrete to form a composite structure. After being transported to the construction site, a second layer of concrete is poured inside the cavity. The technical drawbacks of this structure and process are: only the center is hollowed out, resulting in limited weight reduction; prefabrication and installation costs are relatively high; the process is complex, production efficiency is low, and equipment investment is large; and the surface roughness of the composite concrete within the cavity is difficult to guarantee, affecting the bonding of the second layer of concrete and compromising overall load-bearing capacity.
[0006] Meanwhile, precast hollow columns without dismantling formwork: using formwork without dismantling, the steel reinforcement system of the column is pre-wrapped to form the entire cavity, and the whole column is transported to the construction site for concrete pouring; its disadvantages include low rigidity of hollow columns, easy damage during transportation and hoisting; and easy bulging of the formwork during on-site pouring.
[0007] In other words, there is a need for a composite hollow column that is highly industrialized and integrated, and can solve the problems of heavy weight, complex manufacturing process, high cost and poor overall load-bearing capacity of existing frame columns. Utility Model Content
[0008] In view of this, the purpose of this utility model is to provide a structure of combined hollow columns that is highly industrialized and integrated, and can solve the problems of heavy weight, complex process, high cost and poor overall stress of existing frame columns; it can overcome the shortcomings of the existing technology.
[0009] The objective of this utility model is achieved through the following technical solution:
[0010] This utility model discloses a structure of a composite hollow column, which includes a rectangular central steel reinforcement frame assembly. On opposite sides of the central steel reinforcement frame assembly, a first composite column and a second composite column are respectively cast in post. On the adjacent sides of the first composite column and the second composite column, additional steel reinforcement meshes are respectively provided. The additional steel reinforcement meshes are "C" shaped structures and are staggered along the longitudinal direction of the central steel reinforcement frame assembly. The additional steel reinforcement meshes serve as a supporting skeleton. On the left and right sides of the first and second non-removable templates, first non-removable templates and second non-removable templates are respectively cast in post.
[0011] The first and second formwork panels that do not need to be removed have gaps with the side walls of the central steel frame assembly.
[0012] The two ends of the aforementioned additional steel mesh are tied and fixed to the middle steel frame assembly.
[0013] The inner walls of the aforementioned first and second composite columns are provided with rough surfaces.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] First, the process is simple, with easy flipping and molding, improving production efficiency. Second, the use of a no-removal-formwork design increases the cavity size, significantly reducing the weight of precast components. Third, the symmetrical first and second composite columns, along with the symmetrical first and second no-removal-formwork, enclose the load-bearing central steel frame assembly, ensuring column rigidity. Fourth, the surface roughness of the composite surfaces is adequately guaranteed; after the roughening of the composite column surfaces is completed, the first and second no-removal-formwork are sealed. Fifth, the number of steel reinforcement connection methods is increased, facilitating construction. Sixth, the production capacity is huge, making it easy to promote and apply. Seventh, the cost is reduced.
[0016] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein:
[0018] Figure 1 This is a schematic diagram of the structure of the additional steel mesh in this utility model.
[0019] Figure 2This is a schematic diagram of the connection structure of the central steel reinforcement frame assembly of this utility model.
[0020] Figure 3 This is a schematic diagram of the connection structure between the additional steel mesh and the central steel frame assembly of this utility model.
[0021] Figure 4 In order to be in Figure 3 The diagram shows the structure after the first composite slab is poured on the foundation.
[0022] Figure 5 In order to be in Figure 4 A schematic diagram of the structure after the second composite slab is poured on the foundation.
[0023] Figure 6 In order to be in Figure 5 A schematic diagram of the structure after the first non-removable formwork is poured on the foundation.
[0024] Figure 7 In order to be in Figure 6 A schematic diagram of the structure after the second non-removable formwork is poured on the foundation.
[0025] Among them, the central steel frame assembly 1; the first composite column 2; the second composite column 3; the additional steel mesh 4; the first formwork that does not need to be removed 5; and the second formwork that does not need to be removed 6. Detailed Implementation
[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.
[0027] like Figures 1-7As shown, this utility model discloses a composite hollow column structure, which includes a rectangular central steel reinforcement frame assembly 1. On opposite sides of the central steel reinforcement frame assembly 1, there are post-cast first composite columns 2 and second composite columns 3. On adjacent sides of the first composite columns 2 and second composite columns 3, there are additional steel reinforcement meshes 4. The additional steel reinforcement meshes 4 have a "C" shape and are staggered along the longitudinal direction of the central steel reinforcement frame assembly 1. The two ends of the additional steel reinforcement meshes 4 are tied and fixed to the central steel reinforcement frame assembly 1. Using the additional steel reinforcement meshes 4 as a supporting framework, additional steel reinforcement meshes are installed on the left and right sides of the first and second non-removable formwork 5 and 6. The first and second formwork panels 5 and 6 are poured afterward. This structure is formed by pouring the first composite column 2 and the second composite column 3 on opposite sides of the central steel frame assembly 1, together with the additional steel mesh 4 and the subsequently poured first and second formwork panels 5 and 6. This helps to strengthen the overall structure. At the same time, the first and second formwork panels 5 and 6 are supported only by the additional steel mesh 4. There are gaps between the first and second formwork panels 5 and 6 and the side wall of the central steel frame assembly 1. The thickness of the first and second formwork panels 5 and 6 is small, which helps to reduce the overall weight.
[0028] The structure and manufacturing process of this prefabricated hollow column include the following steps:
[0029] Step 1: Design and tie the central steel frame assembly 1 and the additional steel mesh 4 according to the dimensions of the hollow column. The transverse length of the additional steel mesh 4 is less than half the side width of the central steel frame assembly 1.
[0030] Step 2: Attach the additional reinforcing mesh 4 to the opposite sides of the central reinforcing frame assembly 1, and arrange them alternately vertically along the longitudinal direction of the central reinforcing frame assembly 1, as shown below. Figure 3 As shown, in the adjacent view, between the upper and lower additional steel reinforcement meshes 4, one end of one additional steel reinforcement mesh 4 is located in the middle of the other additional steel reinforcement mesh 4. This has two advantages: first, it reduces the material used for the additional steel reinforcement mesh 4, which helps to save costs; second, the staggered arrangement of the additional steel reinforcement meshes 4 helps to strengthen the overall structure after the first non-removable formwork 5 and the second non-removable formwork 6 are poured. The two ends of the additional steel reinforcement mesh 4 are respectively tied to the middle steel reinforcement frame assembly 1 with iron wire.
[0031] Step 3: Place one side of the first composite column 2 on the bottom side of the forming mold, pour concrete for the first composite column 2, and cure it.
[0032] Step 4: Rotate the formed first composite column 2 180°, pour concrete for the second composite column 3, and cure it. In steps 3 and 4, rough surfaces are provided on the inner walls of the first composite column 2 and the second composite column 3.
[0033] Step 5: Rotate the formed first composite column 2 and second composite column 3 by 90°, pour concrete for the first formwork 5 without removing it, and cure it.
[0034] Step 6: Rotate the formed first composite column 2, second composite column mold 3 and first non-removable template 5 180°, pour concrete for the second non-removable template 6, and cure it.
[0035] As mentioned above, before the concrete of the first composite column 2 and the second composite column 3 initially sets, the inner cavity of the first composite column 2 and the second composite column 3 is roughened.
[0036] The beneficial effects of this structure are: First, the process is simple, easy to flip and form, and production efficiency is improved; Second, the use of a no-removal-formwork design increases the cavity and significantly reduces the weight of precast components; Third, the symmetrical first composite column 2 and second composite column 3, along with the symmetrical first no-removal-formwork 5 and second no-removal-formwork 6, enclose the load-bearing central steel frame assembly 1, ensuring column rigidity; Fourth, the surface roughness of the composite surfaces is fully guaranteed, and after the surface roughening of the composite columns is completed, the first no-removal-formwork 5 and second no-removal-formwork 6 are sealed; Fifth, the number of steel reinforcement connection methods is increased, facilitating construction; Sixth, the production capacity is huge, making it easy to promote and apply; Seventh, the cost is reduced.
[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to restrict the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present utility model and based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A structure of a combined hollow column comprising a rectangular central reinforcement frame assembly (1), characterized in that, In the middle of the steel frame assembly (1) on both sides of the first post-cast composite column (2) and the second post-cast composite column (3) are respectively provided, and the adjacent two sides of the first post-cast composite column (2) and the second post-cast composite column (3) are respectively provided with additional steel mesh (4), the additional steel mesh (4) is "C" type structure and staggered arrangement along the lengthways direction of the middle of the steel frame assembly (1), with the additional steel mesh (4) as the supporting framework, the first removable formwork (5) and the second removable formwork (6) are respectively post-cast on the left and right sides of the first removable formwork (5) and the second removable formwork (6).
2. The structure of the combined hollow column according to claim 1, characterized in that, The first removable formwork (5) and the second removable formwork (6) are provided with a gap with the side wall of the middle of the steel frame assembly (1).
3. The structure of the combined hollow column according to claim 1, characterized by, The two ends of the additional steel mesh (4) are mutually bound and fixed with the middle of the steel frame assembly (1).
4. The structure of the combined hollow column according to any one of claims 1 to 3, characterized in that, The inner wall of the first post-cast composite column (2) and the second post-cast composite column (3) is provided with a rough surface.