A prefabricated assembly type concrete column structure

Abstract

The utility model discloses a prefabricated assembly type concrete column structure belongs to prefabricated concrete technical field, including at least two axial splicing's column unit, and the column unit is by a plurality of arc column section circumferential splicing and is formed, the cross section of arc column section is scallop, and its inner arc surface is equipped with multiple sets of connecting piece, connecting piece includes fixedly embedding in the connecting rod of arc column section inner arc surface, and the axis of connecting rod is parallel to tangent direction of scallop cross section, and the multiple arc column section of same column unit adopts axial staggered splicing. This prefabricated assembly type concrete column structure, through the axial splicing seam of each arc column section is mutually staggered on the axial direction of concrete column structure, successfully will be concentrated in single cross section joint weak point in traditional assembly type column, disperses to the axial height of different column, thereby effectively delays the generation and development of crack, and the overall bending stiffness and carrying capacity of column are greatly promoted.

Description

Technical Field

[0001] This utility model belongs to the field of precast concrete technology, and in particular relates to a precast assembled concrete column structure. Background Technology

[0002] With the rapid development of industrialized construction, precast concrete structures have been widely used in building engineering due to their advantages such as high construction efficiency, easy control of engineering quality, and minimal environmental impact. As the main vertical load-bearing components, the performance of precast concrete columns, especially the performance of their connection nodes, directly affects the safety and reliability of the overall structure. Therefore, the connection technology of precast columns has become one of the core research topics in this field.

[0003] Currently, common precast column connection methods include grouting sleeve connections, grout-anchored lap joints, and post-tensioned prestressed connections. While these technologies are relatively mature, they still present some inherent challenges in practical applications. For example, the most widely used grouting sleeve connection faces a core issue: the contradiction between the vulnerability of the joint and the integrity of the structure. Specifically, to ensure effective force transfer, the reinforcing bars and sleeves need to be precisely aligned and grouted at the joint. This not only places extremely high demands on precast precision but also concentrates all connections at the same horizontal joint, making this section a weak point in terms of stiffness and strength. When subjected to bending moments or horizontal loads (such as wind loads or seismic forces), stress will concentrate at this joint, easily leading to premature cracking of the joint concrete, affecting the overall flexural (bending) resistance and durability of the column. Furthermore, many connection methods require exposed or protruding connectors, affecting the appearance of the component and increasing the difficulty of subsequent finishing work.

[0004] Therefore, we propose a prefabricated assembled concrete column structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the prior art, all connections of concrete column butt joints are concentrated at the same horizontal joint, making this section a weak link in terms of stiffness and strength. Therefore, a prefabricated assembled concrete column structure is proposed.

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

[0007] A precast assembled concrete column structure includes at least two axially spliced ​​column units, each column unit being formed by circumferentially splicing multiple arc-shaped column segments; the cross-section of each arc-shaped column segment is fan-shaped, and its inner arc surface is provided with multiple sets of connectors.

[0008] The connector includes a connecting rod that is fixedly embedded in the inner arc surface of the arc-shaped column section, and the axis of the connecting rod is parallel to the tangent direction of the sector-shaped section.

[0009] The connecting rods on two adjacent arc-shaped cylindrical segments overlap in a spatially vertical state when spliced ​​in the circumferential direction, and the ends of the connecting rods are provided with downwardly bent fasteners for fastening to the sides of the adjacent connecting rods.

[0010] The connecting rod is provided with a first insertion hole and a second insertion hole respectively. When the fastener is snapped into place, the first insertion hole is coaxially aligned with the second insertion hole on the adjacent connecting rod, and longitudinal steel bars can be inserted through it.

[0011] Preferably, multiple arc-shaped column segments of the same column unit are joined by axial staggered splicing, so that the axial splicing seams of each arc-shaped column segment are staggered from each other in the axial direction of the concrete column structure.

[0012] Preferably, the two sides of the arc-shaped cylindrical segment are respectively provided with side protrusions and side grooves that match the side protrusions; during circumferential splicing, the side protrusions of the arc-shaped cylindrical segment are inserted into the side grooves of the adjacent arc-shaped cylindrical segment.

[0013] Preferably, the top surface of the arc-shaped cylindrical segment is provided with a top protrusion strip, and the bottom surface of the arc-shaped cylindrical segment is provided with a bottom groove that matches the top protrusion strip; during axial splicing, the top protrusion strip of the lower arc-shaped cylindrical segment is inserted into the bottom groove of the upper arc-shaped cylindrical segment.

[0014] Preferably, the arc-shaped column section is a precast reinforced concrete component with a pre-embedded reinforcing steel mesh inside.

[0015] Preferably, the arc-shaped column segment located at the uppermost and / or lowermost end of the concrete column structure is a non-standard segment whose length has been cut to form a flat end face at the top and / or bottom of the overall concrete column structure.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] The core innovation of this precast concrete column structure lies in its axially staggered splicing structure. By staggering the axial splicing seams of each arc-shaped column segment along the axial direction of the concrete column structure, the weakness of the joints, which is concentrated in a single cross-section in traditional precast columns, is successfully distributed to different axial heights of the column. When the column is subjected to bending loads, the stress cannot be concentrated at a single cross-sectional height, thus effectively delaying the generation and development of cracks and significantly improving the overall bending stiffness and load-bearing capacity of the column.

[0018] The side protrusions and grooves on the sides, as well as the top protrusions and bottom grooves on the top and bottom, naturally form a mortise and tenon-like guiding and positioning mechanism during the assembly process, ensuring the accuracy and tightness of the circumferential and axial splicing. At the same time, since all connection operations are completed inside the column, the final column surface is smooth and flat, without any protrusions or exposed connectors, which not only meets the requirements of architectural aesthetics but also facilitates subsequent decorative treatment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the arc-shaped cylindrical segment in this utility model;

[0021] Figure 3 This is a top view of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0023] Figure 5 This is a top view of Embodiment 2 of the present invention.

[0024] In the diagram: 1. Arc-shaped cylindrical section; 2. Connecting rod; 21. Fastener; 22. First insertion hole; 23. Second insertion hole; 3. Longitudinal reinforcing bar; 4. Side protrusion; 5. Side groove; 6. Top protrusion; 7. Bottom groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] Example 1:

[0027] Reference Figure 1-3 A precast assembled concrete column structure includes at least two axially spliced ​​column units. Each column unit is formed by circumferentially splicing multiple arc-shaped column segments 1. The arc-shaped column segment 1 is a basic structural unit. The arc-shaped column segment 1 is prefabricated in a factory using reinforced concrete and has a steel mesh embedded inside to ensure sufficient strength and rigidity. Multiple arc-shaped column segments 1 can be circumferentially spliced ​​to form a complete column unit. At least two such column units are then axially spliced ​​to finally form the required precast assembled concrete column.

[0028] To achieve precise circumferential splicing, this invention provides side protrusions 4 and precisely matching side grooves 5 on the two sides of the arc-shaped column segment 1. During the assembly process, the side protrusion 4 of one arc-shaped column segment 1 can naturally embed into the side groove 5 of the adjacent arc-shaped column segment 1. This mortise and tenon joint structure plays a crucial role in initial positioning and guidance during construction, effectively constraining radial misalignment between components, ensuring the regularity of the geometric shape of the column cross-section after splicing, and laying the foundation for the smooth progress of subsequent key connection processes.

[0029] Reference Figure 1-3 The cross-section of the arc-shaped column segment 1 is fan-shaped, and its inner arc surface is provided with multiple sets of connectors. The connectors include connecting rods 2 that are fixedly embedded in the inner arc surface of the arc-shaped column segment 1. The axis of the connecting rods 2 is parallel to the tangent direction of the fan-shaped cross-section, so that when two adjacent arc-shaped column segments 1 approach each other, the connecting rods 2 they carry can naturally present a spatially perpendicular state and overlap each other. At the end of the connecting rods 2, there is a downwardly bent fastener 21. When the connecting rods 2 overlap, the fastener 21 can automatically lock onto the side of the adjacent connecting rod 2 by gravity and the effect of the component being lowered, forming a highly efficient mechanical interlock. This provides reliable temporary fixation before pouring concrete, preventing the component from loosening or shifting during construction and greatly improving construction safety.

[0030] Reference Figure 1-3 To further enhance the integrity and ultimate load-bearing capacity of the connection nodes, a first insertion hole 22 and a second insertion hole 23 are respectively opened on the two overlapping connecting rods 2. When the fastener 21 is engaged, the first insertion hole 22 and the second insertion hole 23 of the two overlapping connecting rods 2 are aligned coaxially. After the column is spliced ​​as a whole, the construction workers can pass the longitudinal steel bars 3 through the aligned first insertion hole 22 and the second insertion hole 23 in sequence, and pour concrete at the top hole. The poured concrete will be tightly combined with the precast arc-shaped column segment 1 to form a complete, unified and reliable assembled monolithic concrete column. The introduction of the longitudinal steel bars 3 connects the originally independent connecting rods 2 into a spatial whole, forming a strong internal steel reinforcement skeleton, thereby significantly improving the performance of the node when bearing axial force, bending moment and shear force.

[0031] Reference Figure 1-3 In terms of axial splicing, a top protrusion 6 is provided on the top surface of the arc-shaped column segment 1, and a matching bottom groove 7 is provided on the bottom surface. When the upper and lower column units are spliced, the top protrusion 6 at the upper end of the lower column unit will be precisely embedded in the bottom groove 7 at the lower end of the upper column unit. This axial tenon and mortise structure not only ensures the smoothness of force transmission in the axial direction of the column and reduces stress concentration, but also ensures the precise alignment of the upper and lower column units.

[0032] Reference Figure 1-3Multiple arc-shaped column segments 1 of the same column unit are spliced ​​by axial stagger, so that the axial splice joints of each arc-shaped column segment 1 are staggered from each other in the axial direction of the concrete column structure. This avoids the disadvantage of the traditional precast column connection joints being located on the same horizontal plane, and disperses the potential structural weak points to different heights. Its beneficial effect is that when the column is subjected to bending load, the stress cannot be highly concentrated at a single section, thereby fundamentally improving the flexural performance of the column and improving the ductility and safety redundancy of the structure.

[0033] To accommodate the changes in the column end profile caused by the axial misalignment splicing, the arc-shaped column segment 1 located at the top and / or bottom of the concrete column structure can be cut in the factory or on-site according to the actual calculated length to form a non-standard segment. Through this customized cutting process, the top and / or bottom of the final completed concrete column structure can form a flat end face or a regular stepped interface, so as to be smoothly connected with beams, slabs or other components in the building.

[0034] Example 2:

[0035] Reference Figure 4-5 In this embodiment, the column unit is formed by splicing four arc-shaped column segments 1 around its perimeter. In particular, the outer perimeter of the arc-shaped column segment 1 in this embodiment is designed as a right-angle structure. When these four components are spliced ​​together, the column unit formed has a rectangular outer cross-section, which is in stark contrast to the circular column described in Embodiment 1. This fully demonstrates that the core connection and splicing mechanism of this utility model can be applied to various cross-sectional forms and can provide diversified solutions for different architectural aesthetic needs and structural usage scenarios.

[0036] The working process of this utility model is as follows:

[0037] First, during the hoisting and splicing process, the arc-shaped column segments 1 are axially staggered and spliced. The side protrusions 4 and side grooves 5 on the sides of the arc-shaped column segments 1 engage first, achieving the initial radial positioning of the components. Next, when two adjacent arc-shaped column segments 1 approach each other, the connecting rods 2 embedded in the inner arc surface overlap vertically. At this time, the downward-bent fasteners 21 on one end of the connecting rod 2 automatically latch onto the side of the other connecting rod 2 by gravity and the force of the component being lowered, forming a temporary mechanical interlocking system. This provides sufficient initial stability for the entire spliced ​​structure without any external support or complex tools, resisting disturbances during construction and ensuring the accuracy required for subsequent operations.

[0038] Second, after the temporary mechanical interlock is established, by inserting the longitudinal steel bar 3 through the first insertion hole 22 and the second insertion hole 23 which are already coaxially aligned, the longitudinal steel bar 3 tightly connects the originally independent connecting rods 2 which are in a vertical overlapping state, and initially connects the segmented prefabricated parts into a whole that can cooperate to bear the force.

[0039] Third, and finally, concrete is poured into the internal cavity formed by the curved column segment 1. After the poured concrete hardens, it not only fills all the gaps, but also solidifies with the precast curved column segment 1 and the internal three-dimensional steel reinforcement skeleton into a complete composite column. This gives the prefabricated column the integrity and load-bearing capacity comparable to cast-in-place columns.

Claims

1. A precast assembled concrete column structure, characterized in that, The system includes at least two axially spliced ​​column units, each column unit being formed by circumferentially splicing multiple arc-shaped column segments (1); the cross-section of the arc-shaped column segment (1) is fan-shaped, and its inner arc surface is provided with multiple sets of connectors; the connectors include connecting rods (2) fixedly embedded in the inner arc surface of the arc-shaped column segment (1), the axis of the connecting rods (2) being parallel to the tangent direction of the fan-shaped cross-section; the connecting rods (2) on two adjacent arc-shaped column segments (1) overlap in a spatially perpendicular state when spliced ​​circumferentially, and the ends of the connecting rods (2) are provided with downwardly bent fasteners (21) for fastening to the side of the adjacent connecting rods (2); the connecting rods (2) are respectively provided with a first insertion hole (22) and a second insertion hole (23), when the fasteners (21) are fastened in place, the first insertion hole (22) and the second insertion hole (23) on the adjacent connecting rods (2) are coaxially aligned and can be inserted through the longitudinal steel bars (3).

2. The precast assembled concrete column structure according to claim 1, characterized in that, Multiple arc-shaped column segments (1) of the same column unit are spliced ​​by axial misalignment, so that the axial splice joints of each arc-shaped column segment (1) are staggered from each other in the axial direction of the concrete column structure.

3. A precast assembled concrete column structure according to claim 2, characterized in that, The two sides of the arc-shaped column section (1) are respectively provided with side protrusions (4) and side grooves (5) that match the side protrusions (4); when splicing in the circumferential direction, the side protrusions (4) of the arc-shaped column section (1) are inserted into the side grooves (5) of the adjacent arc-shaped column section (1).

4. A precast assembled concrete column structure according to claim 3, characterized in that, The top surface of the arc-shaped column section (1) is provided with a top protrusion strip (6), and the bottom surface of the arc-shaped column section (1) is provided with a bottom groove (7) that matches the top protrusion strip (6); when axially spliced, the top protrusion strip (6) of the lower arc-shaped column section (1) is inserted into the bottom groove (7) of the upper arc-shaped column section (1).

5. A precast assembled concrete column structure according to claim 1 or 4, characterized in that, The arc-shaped column section (1) is a precast reinforced concrete component with a pre-embedded reinforcing steel mesh inside.

6. A precast assembled concrete column structure according to claim 1, characterized in that, The arc-shaped column segment (1) located at the top and / or bottom of the concrete column structure is a non-standard segment with a cut length so that the top and / or bottom of the concrete column structure as a whole form a flat end face.

Images