Non-dismantling formwork superposed hollow column structure

Abstract

The utility model discloses a non-dismantling formwork superposed hollow column structure which comprises two opposite precast concrete slabs and two opposite non-dismantling formworks, and a column body cavity is defined by the two precast concrete slabs and the two non-dismantling formworks. A steel bar net rack is arranged in a cavity of the column body, and the two sides of the steel bar net rack are poured in the two prefabricated concrete slabs respectively. Side connecting plates are arranged on the two sides of the prefabricated concrete plate correspondingly, and the non-dismantling formwork is connected with the side connecting plates in an attached mode. The side connecting plates are connected with pre-embedded bars which are poured in the precast concrete planks. A welding ring is arranged in the non-dismantling formwork and connected with the side connecting plate in a welded mode. And a welding cavity is formed in the inner ring side of the welding ring and penetrates through the disassembly-free template, so that the side connecting plate is exposed towards the outer side of the disassembly-free template through the welding cavity. The non-dismantling formwork is formed in a pouring mode, and the welding ring is embedded in the non-dismantling formwork. Connecting ribs are connected to the welding rings and embedded in the non-dismantling formwork. According to the utility model, the column body has the advantages of high rigidity and good weight reduction effect.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled building engineering, in particular to a non-disassembly template superimposed hollow column structure. Background Art

[0002] Prefabricated buildings are buildings that have their basic components disassembled, molded in factories, and assembled on site, just like building a car. Non-disassembly formwork is a popular formwork that is permanently cast with concrete and is no longer removed. Prefabricated columns are a structural form in prefabricated buildings, usually used in frame structures. Composite components refer to a small part of the component that is prefabricated, and most of the concrete is poured a second time on the construction site and overlapped with the prefabricated part to form a complete load-bearing body.

[0003] Existing prefabricated column structures include prefabricated solid columns, prefabricated hollow columns, and prefabricated hollow columns without dismantling formwork.

[0004] Prefabricated solid columns are columns in which the entire reinforcement system is cast in concrete. The drawbacks are that the components are heavy and the transportation and installation costs are high. Moreover, the load-bearing reinforcement can only be connected by “sleeve grouting”, which is expensive and difficult to guarantee quality.

[0005] Prefabricated hollow columns are hollowed out in the middle and surrounded by concrete. Their defects are that only the center is partially hollowed out, and the weight reduction effect is limited; the prefabrication and installation costs are relatively high; the process is complex, the production efficiency is low, and the equipment investment is large; in addition, the roughness of the concrete overlapping surface in the cavity is difficult to guarantee, which affects the overlapping of the secondary pouring of concrete, and the overall stress performance cannot be fully guaranteed.

[0006] Prefabricated hollow columns with no-disassembly formwork, namely shell columns, are made by wrapping no-disassembly formwork on all four sides outside the steel cage. Their defects are that the hollow columns have low rigidity and are easily damaged during transportation and hoisting; the formwork is very easy to expand during on-site pouring; and the no-disassembly formwork takes up space, reducing the room efficiency and affecting the flatness of the structural layer.

[0007] In view of the above situation, a new prefabricated composite hollow column structure is proposed. Summary of the invention

[0008] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a hollow column structure with a template that does not require disassembly, which can make the column have the advantages of high rigidity and good weight reduction effect.

[0009] Technical solution: To achieve the above-mentioned purpose, the utility model provides a hollow column structure with a non-disassembly formwork, comprising two opposite precast concrete slabs and two opposite non-disassembly formworks, the two precast concrete slabs and the two non-disassembly formworks enclosing a column cavity; a steel grid is arranged in the column cavity, and the two sides of the steel grid are respectively cast in the two precast concrete slabs; side connecting plates are respectively arranged on both sides of the precast concrete slabs, and the non-disassembly formworks are tightly connected to the side connecting plates.

[0010] Furthermore, the side connecting plate is connected with embedded reinforcement, and the embedded reinforcement is cast in the precast concrete slab.

[0011] Furthermore, a welding ring is provided inside the non-disassembly template, and the welding ring is welded to the side connecting plate; the inner ring side of the welding ring is a welding cavity, and the welding cavity penetrates the non-disassembly template, so that the side connecting plate is exposed to the outside of the non-disassembly template through the welding cavity.

[0012] Furthermore, the non-disassembly formwork is cast and formed, and the welding ring is pre-buried in the non-disassembly formwork.

[0013] Furthermore, the welding ring is connected with connecting ribs, and the connecting ribs are pre-embedded in the non-disassembly template.

[0014] Furthermore, one end of the welding ring facing the side connecting plate is flush with the non-disassembly template, and when the non-disassembly template is tightly attached to the side connecting plate, the welding ring and the side connecting plate are correspondingly attached.

[0015] Furthermore, the height of the welding ring is smaller than the thickness of the disassembly-free formwork, and when the disassembly-free formwork is in close contact with the side connecting plate, there is a gap between the welding ring and the side connecting plate; there is a bending portion on the connecting rib, and the welding ring is tilted in the disassembly-free formwork, and the end of the welding ring opposite to the side connecting plate is tilted toward the edge of the disassembly-free formwork; when the welding ring is welded to the side connecting plate, the welding ring pulls the bending portion to deform, so that the welding ring generates an oblique pulling force on the disassembly-free formwork.

[0016] Beneficial effects: The utility model provides a hollow column structure without disassembly template, and its beneficial effects are as follows:

[0017] 1) The column of the utility model is formed by two opposite precast concrete panels and two opposite non-disassembly formworks. Compared with the hollow column surrounded by concrete panels, the weight reduction effect is good, and the overlapped surface of the precast concrete panels is easy to ensure the roughness;

[0018] 2) The column of the utility model is formed by two opposite prefabricated concrete panels and two opposite non-removable formworks. Compared with the formwork column, the column has greater rigidity and higher structural strength;

[0019] 3) The non-disassembly formwork of the utility model is connected to the precast concrete slab by welding the welding ring and the side connecting plate, and the welding ring is arranged obliquely. After the welding ring and the side connecting plate are welded, an oblique pulling force can be applied to both sides of the non-disassembly formwork, so that the non-disassembly formwork is not easy to expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 It is a schematic cross-sectional view of a hollow cylinder of the utility model;

[0021] Attached Figure 2 This is a schematic diagram of pouring the steel grid into the first precast concrete slab;

[0022] Attached Figure 3 This is a schematic diagram of the steel grid being cast into two precast concrete slabs;

[0023] Attached Figure 4 This is a schematic diagram of the structure of the template that does not need to be dismantled;

[0024] Attached Figure 5 It is a schematic diagram of the connection between the welding ring and the connecting rib;

[0025] Attached Figure 6 is a schematic diagram of the shape of the connecting reinforcement;

[0026] Attached Figure 7 It is a structural diagram of the side connecting plate and embedded reinforcement;

[0027] Attached Figure 8 Schematic diagram of the structure of a welding ring arranged at an angle. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] As attached Figures 1 to 8 The hollow column structure with non-removable formwork comprises two relative precast concrete panels 1 and two relative non-removable formworks 2, which enclose a column cavity 3. Compared with a traditional solid column or a hollow column surrounded by concrete panels, the hollow column of the utility model is composed of only two precast concrete panels 1, so it is lighter and has a significant weight reduction effect; and compared with a formwork column surrounded by non-removable formworks 2, the hollow column of the utility model has greater rigidity and is less prone to breakage.

[0030] The precast concrete slab 1 is cast by concrete, and the side of the precast concrete slab 1 facing the column cavity 3 is a rough inner cavity superposition surface 11. When the concrete is cast in the column cavity 3 for the second time, the rough inner cavity superposition surface 11 can make the new and old concrete overlap together, and the force effect is better. The outer side of the precast concrete slab 1, that is, the side facing away from the column cavity 3, is a flat mold table surface 12.

[0031] The column cavity 3 has a steel mesh frame 4, and the two sides of the steel mesh frame 4 are cast in two precast concrete slabs 1. Figure 2 As shown in FIG. 1 , the steel mesh frame 4 includes main bars 13 and stirrups 14. When used, the main bars 13 and stirrups 14 are tied or welded into one body.

[0032] Side connecting plates 5 are respectively provided on both sides of the precast concrete slab 1, and the side connecting plates 5 on both sides of the precast concrete slab 1 are symmetrically arranged, and the non-removal formwork 2 is closely connected to the side connecting plates 5. Since the precast concrete slab 1 is cast by concrete, it is difficult to directly connect with the non-removal formwork 2 by welding, anchor bolts, etc., so the side connecting plates 5 need to be provided to connect the non-removal formwork 2.

[0033] As attached Figure 7 As shown in the figure, the side connecting plate 5 is connected with embedded reinforcement 6, one end of the embedded reinforcement 6 is firmly welded to the side connecting plate 5, the other end of the embedded reinforcement 6 is firmly tied or welded to the steel grid 4, and the embedded reinforcement 6 is integrally cast in the precast concrete slab 1 so that the side connecting plate 5 is firmly connected to the precast concrete slab 1.

[0034] The non-removable template 2 is provided with a welding ring 7, and the welding ring 7 is welded to the side connecting plate 5. Figure 4 As shown in , there is a set of welding rings 7 on the upper and lower sides of the non-disassembly formwork 2, and the two sets of welding rings 7 are respectively connected to the side connecting plates 5 on the two precast concrete panels 1. The cross-sectional dimensions of the welding ring 7 are not larger than the plane dimensions of the side connecting plates 5 to ensure that the welding ring 7 can be stably connected to the side connecting plates 5. The inner ring side of the welding ring 7 is a welding cavity 8, and the welding cavity 8 penetrates the non-disassembly formwork 2, so that the side connecting plates 5 are exposed to the outside of the non-disassembly formwork 2 through the welding cavity 8. When welding, the end of the welding tool is inserted into the welding cavity 8, and then the inner side of the welding ring 7 is welded to the side connecting plates 5. After welding is completed, the welding cavity 8 is sealed.

[0035] The non-disassembly formwork 2 is made of high-strength and high-toughness materials, such as high-performance concrete, epoxy resin, engineering plastics, etc., and is formed by a casting process. During the forming process, the welding ring 7 is pre-buried in the non-disassembly formwork 2 and cast into one piece with the non-disassembly formwork 2. Figure 5 and 6 As shown in , the welding ring 7 is connected with connecting ribs 9, which are welded to the welding ring 7. The connecting ribs 9 are pre-buried in the non-disassembly formwork 2. When the non-disassembly formwork 2 is cast and formed, the welding ring 7 is completely inserted into the non-disassembly formwork 2.

[0036] In one embodiment, the depth direction of the welding ring 7 is consistent with the thickness direction of the non-disassembly formwork 2, and one end of the welding ring 7 facing the side connecting plate 5 is flush with the non-disassembly formwork 2. When the non-disassembly formwork 2 is tightly attached to the side connecting plate 5, the welding ring 7 and the side connecting plate 5 are correspondingly attached, and the welding ring 7 and the side connecting plate 5 are welded together through the welding cavity 8, thereby realizing a stable connection between the non-disassembly formwork 2 and the precast concrete slab 1.

[0037] In another embodiment, as shown in the attached Figure 8 As shown in the figure, the height of the welding ring 7 is less than the thickness of the non-removal template 2. When the non-removal template 2 is in close contact with the side connecting plate 5, the welding ring 7 is separated from the side connecting plate 5 by a gap. The connecting rib 9 has a curved portion 10. The welding ring 7 is tilted in the non-removal template 2. The end of the welding ring 7 opposite to the side connecting plate 5 is tilted toward the edge of the non-removal template 2. When the welding ring 7 is welded to the side connecting plate 5, the welding rings 7 on both sides of the same precast concrete slab 1 are clamped by a clamping mechanism, and a clamping force is applied to the welding ring 7 along the inclination direction of the welding ring 7, so that the welding ring 7 pulls the bending portion 10 to undergo a certain degree of elastic deformation. When the bending portion 10 undergoes a certain degree of deformation, the welding ring 7 and the side connecting plate 5 are welded. In this way, after the welding is completed, the bending portion 10 can maintain a certain degree of elastic deformation, so that the welding ring 7 produces an oblique pulling force on the non-disassembly formwork 2, and the direction of the pulling force is consistent with the inclination direction of the welding ring 7. Therefore, on both sides of the non-disassembly formwork 2, there will be a pulling force to straighten the non-disassembly formwork 2 toward both sides, so that the non-disassembly formwork 2 can better maintain a straight state, the middle part of the non-disassembly formwork 2 is not easy to deform, and the non-disassembly formwork 2 is not easy to expand the mold, so as to solve the problem that the existing non-disassembly formwork 2 is very easy to expand the mold.

[0038] Since the height of the welding ring 7 is smaller than the thickness of the disassembly-free formwork 2, a temporary ring body needs to be added to the top of the welding ring 7 during the casting and forming process of the disassembly-free formwork 2. The temporary ring body can prevent the casting material from entering the welding ring 7. After the disassembly-free formwork 2 is cast and formed, the temporary ring body is removed, so that the height of the welding ring 7 can be smaller than the thickness of the disassembly-free formwork 2.

[0039] A manufacturing process of a hollow column structure with a template that does not require disassembly, comprising the following steps:

[0040] Step S1: prefabricate the steel mesh frame 4, the welding ring 7 and the side plate 5, and then make the first prefabricated concrete slab 1; Figure 2 As shown in the figure, in the process of making the first precast concrete slab 1, the forming mold is first assembled, and then the side connecting plate 5 and the steel mesh frame 4 are embedded, and then the concrete is poured to the designed height, and the inner cavity superimposed surface 11 is roughened before the concrete is initially set, and then cured and formed to obtain the first precast concrete slab 1;

[0041] Step S2: Turn over the first precast concrete slab 1. Figure 3 As shown in the figure, the first precast concrete slab 1 and the steel mesh frame 4 are on the top, and then the forming mold is arranged again, and the second precast concrete slab 1 is made, the steel mesh frame 4 and the side plate 5 are embedded, and the concrete is poured to the designed height, and the inner cavity overlap surface 11 is roughened before the concrete is initially set; after curing and forming, the two precast concrete slabs 1 are symmetrically distributed on both sides of the steel mesh frame 4;

[0042] Step S3: prepare the mold according to the design specifications and dimensions, embed the welding ring 7, and then cast the mold 2 without disassembly;

[0043] Step S4: symmetrically weld two pieces of non-disassembly formwork 2 on both sides of the precast concrete slab 1; if an inclined welding ring 7 is selected, the welding rings 7 on both sides of the same precast concrete slab 1 are clamped by a clamping mechanism during welding, and a clamping force is applied to the welding rings 7 along the inclined direction of the welding rings 7, so that after welding, the bending portion 10 of the connecting rib 9 will have a certain degree of elastic deformation, so that the welding ring 7 generates an oblique pulling force on the non-disassembly formwork 2, and the oblique pulling force on both sides of the non-disassembly formwork 2 cooperates to straighten the non-disassembly formwork 2, so that the non-disassembly formwork 2 is not easy to expand.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A hollow column structure with a template that does not require disassembly, characterized in that: The invention comprises two opposed precast concrete panels (1) and two opposed non-removal formworks (2), wherein the two precast concrete panels (1) and the two non-removal formworks (2) enclose a column cavity (3); a steel mesh frame (4) is arranged in the column cavity (3), and the two sides of the steel mesh frame (4) are respectively cast in the two precast concrete panels (1); side connecting plates (5) are respectively arranged on the two sides of the precast concrete panels (1), and the non-removal formworks (2) are closely connected to the side connecting plates (5).

2. The hollow column structure of the free-disassembly formwork stack according to claim 1, characterized in that: The side connecting plate (5) is connected with embedded reinforcement (6), and the embedded reinforcement (6) is cast in the precast concrete plate (1).

3. The hollow column structure of the free-disassembly formwork stack according to claim 1 is characterized in that: A welding ring (7) is arranged inside the non-disassembly template (2), and the welding ring (7) is connected to the side connecting plate (5) by welding; the inner ring side of the welding ring (7) is a welding cavity (8), and the welding cavity (8) penetrates the non-disassembly template (2), so that the side connecting plate (5) is exposed to the outside of the non-disassembly template (2) through the welding cavity (8).

4. The hollow column structure of the free-disassembly formwork stack according to claim 3 is characterized by: The non-disassembly formwork (2) is cast and formed, and the welding ring (7) is pre-buried in the non-disassembly formwork (2).

5. The hollow column structure of the free-disassembly formwork stack according to claim 4, characterized in that: The welding ring (7) is connected with a connecting rib (9), and the connecting rib (9) is pre-buried in the disassembly-free template (2).

6. The hollow column structure of the free-disassembly formwork stack according to claim 5, characterized in that: One end of the welding ring (7) facing the side connecting plate (5) is flush with the non-disassembly template (2); when the non-disassembly template (2) and the side connecting plate (5) are in close contact, the welding ring (7) and the side connecting plate (5) are in corresponding contact.

7. The hollow column structure of the free-disassembly formwork stack according to claim 5, characterized in that: The height of the welding ring (7) is smaller than the thickness of the non-disassembly template (2); when the non-disassembly template (2) is in close contact with the side connecting plate (5), a gap is formed between the welding ring (7) and the side connecting plate (5); a bending portion (10) is provided on the connecting rib (9); the welding ring (7) is tiltedly arranged inside the non-disassembly template (2); the end of the welding ring (7) opposite to the side connecting plate (5) is tilted toward the edge of the non-disassembly template (2); when the welding ring (7) is welded to the side connecting plate (5), the welding ring (7) pulls the bending portion (10) to deform, so that the welding ring (7) generates an oblique pulling force on the non-disassembly template (2).

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