Prefabricated column structure

Abstract

The utility model belongs to the technical field of assembly type building engineering, and particularly relates to a prefabricated column structure. Comprising a prefabricated column body, a reinforcing steel bar system and a plurality of non-dismantling formwork opposite-pulling pieces, the prefabricated column body is of a hollow structure defined by an A-face prefabricated laminated plate, a B-face prefabricated laminated plate, a C-face non-dismantling formwork and a D-face non-dismantling formwork, the A-face prefabricated laminated plate and the B-face prefabricated laminated plate are longitudinally and oppositely arranged, and the C-face non-dismantling formwork and the D-face non-dismantling formwork are transversely and oppositely arranged. The two longitudinal sides of the steel bar system are pre-buried in the A-face prefabricated laminated slab and the B-face prefabricated laminated slab correspondingly, and the C-face non-dismantling formwork and the D-face non-dismantling formwork are connected in an opposite-pulling mode through a plurality of non-dismantling formwork opposite-pulling pieces. The overall rigidity of the prefabricated column body is greatly improved, the forming precision of the prefabricated column is guaranteed, the forming process is simple, and it is guaranteed that mold expansion is avoided during on-site secondary pouring.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building engineering technology, and specifically relates to a prefabricated column structure. Background Technology

[0002] Prefabricated construction involves manufacturing basic building components such as beams, slabs, columns, and walls in a factory and then assembling them on-site. Frame structure buildings are a type of building where the vertical structure consists of frame columns, and the horizontal structure consists of frame beams and floor slabs. Traditional precast columns are solid concrete structures, but due to their heavy weight and difficulties in connecting the upper and lower reinforcing bars, they are gradually being replaced by precast hollow columns.

[0003] Existing precast hollow column structures include four-sided composite hollow columns and four-sided formwork-free hollow columns. Four-sided composite hollow columns consist of a thin concrete slab poured around the perimeter of the column's reinforcing cage, with the center of the column hollowed out and the reinforcing bars located within the surrounding concrete. The four-sided composite hollow column manufacturing process utilizes a centrifugal molding method, which requires significant equipment investment, makes it difficult to create a rough concrete surface within the cavity, affecting the composite effect of secondary pouring, and results in a relatively large weight.

[0004] Four-sided formwork-free hollow columns: The steel cage is wrapped with formwork on all four sides. The process of four-sided formwork-free hollow columns adopts the flip-casting molding process, that is, the steel cage is flipped three times and the formwork-free casting material is poured three times to form the precast column. The rigidity of the precast column is small, and it is easy to deform during transportation and hoisting. The reason is that in the steel reinforcement system, the stirrups and main bars are tied together (the specification requires that welding is not allowed). After forming, the whole is soft and easy to bend or twist. The forming accuracy is also poor. The cost of four-sided formwork-free is high. In addition, it is difficult to embed conduits and junction boxes, resulting in low production efficiency. During the second pouring, the formwork is very easy to bulge. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a precast column structure that solves the problems of low production efficiency, high cost, poor secondary casting and overlapping effect, and easy formwork bulging in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a precast column structure, including a precast column body, a steel reinforcement system, and multiple non-removable template tie rods. The precast column body is a hollow structure enclosed by precast composite slabs A and B arranged longitudinally opposite each other and non-removable templates C and D arranged laterally opposite each other. The steel reinforcement system is set in the cavity of the precast column body, and the longitudinal sides of the steel reinforcement system are respectively embedded in the precast composite slabs A and B. The non-removable templates C and D are connected by multiple non-removable template tie rods.

[0008] The non-removable template tie rod includes a tie rod body and a right end anchor plate and a left end anchor plate respectively disposed at both ends of the tie rod body. The right end anchor plate and the left end anchor plate are respectively embedded in the C-side non-removable template and the D-side non-removable template.

[0009] The tie rod body is rod-shaped and is tied to the steel reinforcement system.

[0010] The right end anchor plate and the left end anchor plate are respectively formed by bending the ends of the tie body;

[0011] Alternatively, the right-end anchor plate and the left-end anchor plate are welded or threaded to the ends of the tie rod body.

[0012] Both the right-end anchor plate and the left-end anchor plate are Y-shaped structures.

[0013] Limiting blocks are pre-embedded on both sides of the C-side and D-side templates. The limiting blocks on both sides contact the A-side prefabricated composite slab and the B-side prefabricated composite slab, respectively. The limiting blocks are used to control the thickness of the C-side and D-side templates.

[0014] The limiting pad is made of plastic.

[0015] Both the C-side and D-side formwork are made of ultra-high performance concrete.

[0016] The steel reinforcement system includes a column main reinforcement system and a column stirrup system. The column main reinforcement system includes multiple main reinforcement bars located on the periphery of the steel reinforcement system and arranged vertically at intervals. The column stirrup system includes multiple stirrups that connect the multiple main reinforcement bars into one unit along the circumferential, transverse and longitudinal directions.

[0017] Both the A-side precast composite slab and the B-side precast composite slab are made of concrete, and all the main reinforcement bars and stirrups on one side of the steel reinforcement system are tightly wrapped. The inner sides of the A-side precast composite slab and the B-side precast composite slab must be roughened according to the specifications.

[0018] The advantages and positive effects of this utility model are as follows: The precast column structure provided by this utility model is a double-sided overlapping, double-sided mold-free combined structure, which has high production efficiency and low cost. The main reinforcement system on both sides is embedded in the concrete slab, which greatly improves the overall rigidity of the precast column, thereby ensuring the forming accuracy of the precast column. The forming process is simple and does not require special equipment. Various embedded parts and hoisting parts can be easily implemented. The combined precast hollow column ensures that there will be no bulging of the mold during secondary on-site pouring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a precast column structure according to the present invention;

[0020] Figure 2 This is a structural schematic diagram of the non-removable template tie rod in this utility model;

[0021] Figure 3 This is a schematic diagram of the binding of the tie members of the formwork and the reinforcing steel system in this utility model;

[0022] Figure 4 This is a schematic diagram illustrating the preparation of the prefabricated composite plate on side A in an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram illustrating the preparation of the B-side prefabricated composite slab in an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the preparation of the C-side non-removable template in an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram of the preparation of the D-side non-removable template in an embodiment of this utility model.

[0026] In the diagram: 1 is the precast composite slab on side A, 2 is the precast composite slab on side B, 3 is the main reinforcement system of the column, 4 is the stirrup system of the column, 5 is the formwork for side C that does not need to be removed, 6 is the formwork for side D that does not need to be removed, 7 is the tie rod for the formwork that does not need to be removed, 7-1 is the body of the tie rod, 7-2 is the right end anchor plate, 7-3 is the left end anchor plate, 8 is the limiting pad, B1 is the design thickness of the precast composite slab on side A, B2 is the design thickness of the precast composite slab on side B, and H is the design thickness of the formwork for sides C and D that does not need to be removed. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See Figure 1 As shown, this utility model provides a precast column structure, including a precast column body, a steel reinforcement system, and multiple non-removable template tie rods 7. The precast column body is a hollow structure enclosed by precast composite slabs 1 and 2 on the A side arranged longitudinally opposite to each other and non-removable templates 5 on the C side and 6 on the D side arranged laterally opposite to each other. The steel reinforcement system is set in the cavity of the precast column body, and the longitudinal sides of the steel reinforcement system are respectively embedded in the precast composite slabs 1 on the A side and 2 on the B side. The non-removable templates 5 on the C side and 6 on the D side are connected by multiple transversely arranged non-removable template tie rods 7.

[0029] See Figure 1As shown in the embodiment of this utility model, the steel reinforcement system includes a column main reinforcement system 3 and a column stirrup system 4. The multiple column main reinforcement systems 3 include multiple main reinforcements located on the periphery of the steel reinforcement system and arranged vertically at intervals. The column stirrup system 4 includes multiple stirrups that connect the multiple main reinforcements into one unit along the circumferential, transverse and longitudinal directions.

[0030] Specifically, the main reinforcement includes the corner reinforcement and the reinforcement distributed around the column, the arrangement of which is determined by the design. Stirrups are distributed around the column and in the middle; the size and spacing of the stirrups are determined by the design.

[0031] See Figure 1 and Figure 2 As shown in the embodiment of this utility model, the non-removable template tie member 7 includes a tie member body 7-1 and a right end anchor plate 7-2 and a left end anchor plate 7-3 respectively disposed at both ends of the tie member body 7-1. The right end anchor plate 7-2 and the left end anchor plate 7-3 are respectively embedded in the C-side non-removable template 5 and the D-side non-removable template 6.

[0032] Further, see Figure 3 As shown, the tie body 7-1 is rod-shaped and is tied to the column stirrup system 4 located in the middle of the reinforcing steel system. The specifications and dimensions of the tie body 7-1 are determined by mechanical calculations. Specifically, the right end anchor plate 7-2 and the left end anchor plate 7-3 are respectively bent into shape from the two ends of the tie body 7-1; or, the right end anchor plate 7-2 and the left end anchor plate 7-3 are welded or threaded to the ends of the tie body 7-1.

[0033] Preferably, both the right-end anchor plate 7-2 and the left-end anchor plate 7-3 are Y-shaped structures.

[0034] In this embodiment of the utility model, the material of the non-removable template tie member 7 is a high-strength metal part, and the left and right anchor plates at both ends are respectively inserted into the non-removable template on the D and C surfaces. Their specifications, arrangement quantity and position are determined according to the specifications of the precast column.

[0035] Further, see Figure 1 As shown, limiting blocks 8 are pre-embedded on both sides of the C-side non-removable template 5 and the D-side non-removable template 6. The limiting blocks 8 on both sides are in contact with the A-side precast composite slab 1 and the B-side precast composite slab 2, respectively. The limiting blocks 8 are used to control the thickness of the C-side non-removable template 5 and the D-side non-removable template 6. Preferably, the limiting blocks 8 are made of plastic.

[0036] In the embodiments of this utility model, both the C-side non-removable formwork 5 and the D-side non-removable formwork 6 are made of ultra-high performance concrete with extremely high strength, which can greatly reduce the thickness of the non-removable formwork. After the column is installed, the formwork is no longer removed and is permanently integrated with the column.

[0037] Specifically, both the precast composite slab 1 on side A and the precast composite slab 2 on side B are made of concrete, which tightly wraps all the main reinforcement and stirrups on one side of the column. At the same time, the inner side of the slab must be roughened according to the specifications to facilitate the later bonding with the cast-in-place concrete.

[0038] The construction process of the precast column structure provided by this utility model is as follows:

[0039] Design phase: including reinforcement system, determination of the thickness of the CD side formwork, determination of the thickness of the AB side precast composite slab, and layout of various embedded parts, etc.

[0040] Preparation phase:

[0041] Reinforcing steel system preparation;

[0042] The preparation of the formwork-free tie member 7 and the secure binding of the formwork-free tie member 7 to the reinforcing steel system are described in the following section. Figure 3 As shown;

[0043] Mold table and mold preparation;

[0044] Precast column manufacturing process:

[0045] The prepared reinforcing steel system (including the column main reinforcement system 3 and the column stirrup system 4) is in place, the side formwork is erected, and the concrete for the precast composite slab 1 on side A is poured to the designed thickness B1 of the precast composite slab on side A. It is then cured and formed. At this point, the bottom surface of the reinforcing steel system is already bonded to the concrete of the precast composite slab 1 on side A. See [link / reference]. Figure 4 As shown;

[0046] The aforementioned components are rotated 180°, and concrete is poured onto the precast composite slab 2 on side B to the designed thickness B2. After curing, the other side of the reinforcing steel system is also embedded in the concrete of the precast composite slab 2 on side B. (See...) Figure 5 As shown;

[0047] Rotate it another 90° so that the end of the non-removable template tie 7 is inserted into the slurry of the non-removable template 5 on surface C, and cure it together. See [link / reference]. Figure 6 As shown;

[0048] Similarly, rotate the composite component another 180° to complete the pouring of the formwork 6 on side D (no need to remove it). See below. Figure 7 As shown;

[0049] The precast columns with hollow structures have been completed.

[0050] Furthermore, when pouring the C-side and D-side templates (which do not need to be removed), the design thickness H of the C-side and D-side templates is precisely controlled by placing limiting pads 8. (See [reference needed]). Figure 1 As shown.

[0051] This utility model provides a precast column structure that, compared with existing structural forms and construction processes, features a simpler process and requires no special equipment. The precast hollow column is a double-sided, double-sided formwork-free composite structure that meets national standards. The double-sided main reinforcement system is embedded in the concrete slab, which greatly improves the overall rigidity of the precast column and thus ensures the forming accuracy of the precast column. Various embedded parts and hoisting parts are easy to implement. The formwork-free tie rod 7 ensures that the formwork will not bulge during secondary on-site pouring.

[0052] The above description is merely an embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, extensions, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A precast column structure, characterized in that, It includes a precast column, a steel reinforcement system and multiple non-removable template tie rods (7). The precast column is a hollow structure enclosed by longitudinally opposite precast composite slabs A-side (1) and B-side precast composite slabs (2) and transversely opposite non-removable templates C-side (5) and D-side non-removable templates (6). The steel reinforcement system is set in the cavity of the precast column, and the longitudinal sides of the steel reinforcement system are respectively embedded in the precast composite slabs A-side (1) and B-side precast composite slabs (2). The non-removable templates C-side (5) and D-side (6) are connected by multiple non-removable template tie rods (7).

2. The precast column structure according to claim 1, characterized in that, The non-removable template tie member (7) includes a tie member body (7-1) and a right end anchor plate (7-2) and a left end anchor plate (7-3) respectively disposed at both ends of the tie member body (7-1). The right end anchor plate (7-2) and the left end anchor plate (7-3) are respectively embedded in the C-side non-removable template (5) and the D-side non-removable template (6).

3. The precast column structure according to claim 2, characterized in that, The tie rod body (7-1) is rod-shaped and is tied to the steel reinforcement system.

4. The precast column structure according to claim 3, characterized in that, The right end anchor plate (7-2) and the left end anchor plate (7-3) are respectively formed by bending the ends of the tie body (7-1); Alternatively, the right-end anchor plate (7-2) and the left-end anchor plate (7-3) are welded or threaded to the ends of the tie body (7-1).

5. The precast column structure according to claim 2, characterized in that, Both the right-end anchor plate (7-2) and the left-end anchor plate (7-3) are Y-shaped structures.

6. The precast column structure according to claim 1, characterized in that, Limiting pads (8) are pre-embedded on both sides of the C-side non-removable template (5) and the D-side non-removable template (6). The limiting pads (8) on both sides are in contact with the A-side prefabricated composite plate (1) and the B-side prefabricated composite plate (2), respectively. The limiting pads (8) are used to control the thickness of the C-side non-removable template (5) and the D-side non-removable template (6).

7. The precast column structure according to claim 6, characterized in that, The limiting pad (8) is made of plastic.

8. The precast column structure according to claim 1, characterized in that, Both the C-side non-removable formwork (5) and the D-side non-removable formwork (6) are made of ultra-high performance concrete.

9. The precast column structure according to claim 1, characterized in that, The steel reinforcement system includes a column main reinforcement system (3) and a column stirrup system (4). The column main reinforcement system (3) includes multiple main reinforcements located on the periphery of the steel reinforcement system and arranged vertically at intervals. The column stirrup system (4) includes multiple stirrups that connect the multiple main reinforcements into one unit along the circumferential, transverse and longitudinal directions.

10. The precast column structure according to claim 9, characterized in that, Both the precast composite slab (1) on side A and the precast composite slab (2) on side B are made of concrete, and all the main bars and stirrups on one side of the steel reinforcement system are tightly wrapped. The inner sides of the precast composite slab (1) on side A and the precast composite slab (2) on side B need to be roughened according to the specifications.

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