Prefabricated concrete mixed component and connecting method thereof

Abstract

The invention discloses a prefabricated concrete mixed component and a connecting method thereof. The prefabricated concrete mixed component comprises a column body unit, a column tail unit connected to the bottom of the column body unit and a column head unit connected to the top of the column body unit. The column body unit comprises column body concrete and column body vertical ribs, and the column body vertical ribs are connected with the column tail unit and the column head unit; through the arrangement of the column body unit, the column tail unit and the column head unit, standardized prefabrication based on existing construction is guaranteed, and on-site fabricated construction is facilitated; wherein the column body units can be prefabricated and manufactured in batches according to the construction height and strength, the construction quality is guaranteed, and the construction time is saved; by arranging the column head unit and the column body unit, on-site assembly is facilitated, connection joints are more stable through on-site pouring, and the structural integration is higher; through the arrangement of the extending sections of the vertical ribs, butt joint connection and fixation of the column body unit, the column tail unit and the column head unit can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of precast concrete column installation, and in particular to a precast concrete mixed component and a connection method thereof. Background Art

[0002] In construction projects, a lot of construction needs to be done on site. For example, a skeleton made of steel bars is cast with concrete on site to make load-bearing columns, brackets, floor plates and other components of the building. Since the concrete casting process takes a lot of time and is easily affected by bad weather such as rain and snow, traditional construction has the disadvantage of being time-consuming. In addition, during the on-site construction process, quality problems are easily caused by human factors. For example, common quality problems include uneven concrete casting and irregular steel bar binding.

[0003] In order to overcome these problems and improve construction efficiency, a construction method using hybrid components has emerged in buildings. For example, hybrid components such as load-bearing columns, brackets, and floor plates can be prefabricated in the factory using steel, and then these hybrid components can be installed on site to meet the requirements. The advantages of this construction method are: the hybrid components are manufactured in the factory, so there is no need to worry about the adverse effects of bad weather; the prefabrication process can be carried out before or at the same time as the site construction, thus saving a lot of on-site construction hours; the prefabrication process is controlled by professional workers and automated equipment, which can greatly reduce the occurrence of human errors and avoid unnecessary material waste; the factory environment is relatively stable, which is conducive to ensuring the maintenance conditions of concrete, thereby improving the strength and durability of the hybrid components.

[0004] If the concrete columns are to be installed in a standardized assembled manner, it involves more than just the design of a single steel component or reinforced concrete component; in particular, the connection between the concrete column and the steel tube concrete column, how to standardize the production and assembly through prefabrication and ensure the strength of the connection, currently there is little need for targeted design. Summary of the invention

[0005] The invention provides a prefabricated concrete mixed component and a connection method thereof, which are used to solve the technical problems of standardized production, assembly installation and grouting connection at connection points of a concrete mixed column.

[0006] To achieve the above object, the present invention adopts the following technical solution: A prefabricated concrete hybrid component comprises a column shaft unit, a column tail unit connected to the bottom of the column shaft unit, and a column head unit connected to the top of the column shaft unit; The column unit is a precast concrete column, and the column unit comprises column concrete and a steel cage inside the column concrete; The steel cage is composed of column stirrups, column vertical bars connected to the column stirrups and arranged at intervals, and column tension bars connected between the column vertical bars; Wherein, column welding sections are arranged at both ends of the column body vertical reinforcement; the column welding sections are respectively connected to the column tail steel pipe and the column head steel pipe; An inner lining ring is connected inside the column tail steel pipe, and the column tail steel pipe and the inner lining ring are combined into a column tail unit, and concrete is poured in the column tail unit; A column cap grouting hole is arranged at the bottom of the column cap steel pipe, and an observation exhaust hole is arranged at the top of the column cap steel pipe. The column cap steel pipe, the column cap grouting hole and the observation exhaust hole are combined into a column cap unit, and concrete is poured in the column cap unit.

[0007] Furthermore, both ends of the column vertical reinforcement extend out of the column concrete, and the extension lengths correspond to the connection lengths with the column head steel pipe and the column tail steel pipe respectively, and the length of the column welding section meets the requirement of being greater than 5 times the diameter of the column vertical reinforcement.

[0008] Furthermore, a core material is arranged on the central axis inside the column concrete, and the top and bottom of the core material extend into the column head unit and the column tail unit respectively; the total height of the core material is not greater than the total height of the mixed component.

[0009] Furthermore, the core material is a steel profile, and the steel profile is in the shape of a straight line, a T-shape, an I-shape, an H-shape or a square shape.

[0010] Furthermore, the length of the column tail steel pipe corresponds to the connected column head steel pipe setting and the size of the column tail steel pipe corresponds to the size of the column body concrete setting; an inner lining ring is welded inside the column tail steel pipe, one side of the inner lining ring is connected to the column tail steel pipe, and the other side is protruding; the protruding length corresponds to the design length setting of the column head steel pipe or the connecting structure.

[0011] Furthermore, the size of the column head grouting hole is adapted to the designed grouting volume and grouting speed, and the outer side of the column head grouting hole is detachably connected to the anti-gravity grouting pipe; at least one observation and exhaust hole is provided and is located on one side of the top of the column head steel pipe.

[0012] Furthermore, the size of the column head steel pipe is set corresponding to the size of the column body concrete and is also connected to a steel beam on the outside, and ribs are set inside the column head steel pipe at the top and bottom elevations of the steel beam; the ribs are U-shaped plates.

[0013] Further, the connection method of precast concrete hybrid components comprises the following specific steps: Step 1: Establish a three-dimensional model according to the detailed drawings, divide the column units based on the three-dimensional model to determine the length of the column units, and determine the number of column units according to the overall height of the structure; set a filling grouting section at the joints between the head and tail of adjacent column units; Step 2: Prefabricate the column unit, make a steel cage through the column stirrups, column vertical bars and column tension bars, and pour the column concrete of a certain length outside the steel cage; before pouring, check whether the extension length of the column vertical bars meets the design requirements; Step 3: weld an inner lining ring at the lower middle part of the column tail steel pipe, and partially protrude the inner lining ring from the column tail steel pipe, thereby forming a column tail unit; then weld the column tail unit to the column body vertical reinforcement at the bottom of the column body unit; and fill and seal the joint between the column tail steel pipe and the column body concrete; A rib plate is connected inside the column head steel pipe, and a column head grouting hole is drilled at the bottom of the column head steel pipe, and an observation exhaust hole is drilled at the top of the column head steel pipe, thereby forming a column head unit; the column head unit is welded to the vertical reinforcement of the column body at the top of the column body unit; and the joint between the column head steel pipe and the column body concrete is filled and sealed; Step 4: The column shaft unit is connected to the column tail unit and the column head unit to form a prefabricated hybrid component, so that batch and standard intelligent assembly is carried out in the factory; and then the actual construction is carried out on site; Step 5: pre-connect the first column head unit on the frame column or foundation on site, wherein a portion of the column head steel pipe of the column head unit is pre-buried inside the frame column or foundation, and the other portion is set in a cavity; and the column head grouting hole of the column head unit is set near the top surface elevation of the frame column or foundation; Step 6: Install the assembled hybrid component on the first column head unit through the intelligent lifting equipment, and connect the first column head unit through the lining ring of the column tail unit; after installation, the column tail unit and the first column head unit form a filling grouting section, install an anti-gravity grouting pipe at the column head grouting hole of the first column head unit, and then perform grouting of the filling grouting section; Step 7: A steel beam joint is pre-welded at the column head unit at the top of the hybrid component. After the filling and grouting section is cured and reaches the designed strength, the steel beam and floor slab are installed here; and then the next hybrid component is installed at the top of the hybrid component; Step eight, the adjacent hybrid components are connected by butt-jointing the inner lining ring; the column head unit at the bottom and the column tail unit at the top form a filling grouting section, and then the anti-gravity grouting pipe is installed at the column head grouting hole at the column head unit to grout the filling grouting section; thus, the hybrid components are connected in sequence from bottom to top until the entire structure connection and installation are completed.

[0014] Furthermore, a core material is provided in the column unit, and an end of the core material extends into the filling grouting section and the extending length at least exceeds the elevation of the bottom surface of the corresponding steel beam.

[0015] Furthermore, during installation, docking auxiliary parts are temporarily set on the column head steel pipe and the column tail steel pipe at the connection of the hybrid component, and the docking auxiliary parts include ear plates connected to the column head steel pipe, ear plates connected to the column tail steel pipe, and connecting rods pinned between the upper and lower ear plates; the docking auxiliary parts are correspondingly arranged at the annular intervals of the column head steel pipe or the column tail steel pipe.

[0016] The beneficial effects of the present invention are embodied in: 1) The present invention not only ensures standardized prefabrication based on existing construction, but also facilitates on-site assembly construction through the arrangement of the column shaft unit, the column tail unit and the column head unit; the column shaft unit can be prefabricated and mass-produced according to the height and strength of the construction, thereby ensuring the construction quality and saving construction time; the arrangement of the column head unit and the column shaft unit facilitates on-site assembly, and the connection nodes are more stable through on-site casting, and the structural integration is more complete; 2) The present invention facilitates the butt connection and fixation of the column shaft unit, the column tail unit and the column head unit by setting the extended section of the vertical reinforcement, and further ensures the integrity and force strength of the connection by setting the core material; 3) The present invention performs grouting by a counter-gravity grouting method, which is beneficial to filling the grouting section formed by the connection point, thereby ensuring the strength of the connection point; further, the integral connection between the steel pipe and the concrete is improved by setting the rib plate.

[0017] 4) The present invention produces concrete components in a factory, which can be carried out simultaneously with on-site foundation construction, etc., reducing the time of on-site operations and improving construction efficiency. When the on-site construction conditions are met, the prefabricated frame can be quickly installed using hybrid components, greatly shortening the construction period of the overall project; and through standardized production, standardized and intelligent production processes and strict quality control systems, the dimensional accuracy and quality stability of the hybrid components can be ensured. In addition, factory production can accurately control the amount of materials and reduce waste. The hybrid components adopt optimized design and production processes, which can save materials to the maximum extent while ensuring structural strength. It is also beneficial to environmental protection and energy saving, reducing construction waste. Less construction waste is generated during the production process of hybrid components. The factory can recycle waste materials to reduce pollution to the environment.

[0018] In addition, the prefabricated frame has better earthquake resistance. Hybrid components can improve the earthquake resistance of buildings through reasonable design and connection methods. The connection between hybrid components adopts a reliable node structure, which can effectively transmit earthquake forces and ensure the stability of the building structure. The hybrid components are precise in size, which can achieve more flexible building design and improve space utilization. Other features and advantages of the present invention will be explained in the subsequent description, and partly become obvious from the description, or be understood through the implementation of the present invention; the main purpose and other advantages of the present invention can be achieved and obtained through the schemes particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of precast concrete hybrid components; Figure 2 It is a schematic diagram of the column unit structure; Figure 3 It is a schematic diagram of a column unit containing core material; Figure 4 It is a schematic diagram of the cross section of a square column unit; Figure 5 It is a schematic diagram of the cross section of a circular column unit; Figure 6 It is a schematic diagram of the column tail unit structure; Figure 7 It is a schematic diagram of the column head unit structure; Figure 8 It is a schematic diagram of the connection structure between the column body unit and the column tail unit; Fig. 9 It is a schematic diagram of the connection structure between the column shaft unit containing the core material and the column tail unit; Fig.10 It is a schematic diagram of the installation of the first column head unit at the frame column (a) and foundation (b); Fig.11 It is a schematic diagram of the installation of mixed components at the frame column (a) and foundation (b); Fig.12 It is a schematic diagram of grouting construction of mixed components at frame columns (a) and foundations (b); Fig.13 This is a schematic diagram of the installation of steel beams and floor slabs after grouting of the composite components at the frame columns (a) and foundations (b); Fig.14 It is a schematic diagram of the installation of the second hybrid component at the frame column (a) and the foundation (b); Fig.15 Schematic diagram of grouting of the second hybrid component at the frame column (a) and foundation (b); Fig.16 It is a schematic diagram of the installation of hybrid components in sequence at the frame column (a) and the foundation (b); Fig.17It is a schematic diagram of the installation of a composite component with core material at the frame column (a) and foundation (b); Fig.18 Schematic diagram of grouting construction of composite components containing core materials at frame columns (a) and foundations (b); Fig.19 It is a schematic diagram of the installation of steel beams and floor slabs after grouting of composite components containing core materials at frame columns (a) and foundations (b); Fig. 20 Schematic diagram of the installation of the second composite component with core material at the frame column (a) and foundation (b); Fig.21 Schematic diagram of grouting of the second hybrid component with core material at the frame column (a) and foundation (b); Fig. 22 Schematic diagram of sequential installation of hybrid components with core materials at frame columns (a) and foundations (b); Fig.23 It is a schematic diagram of the 3D software model of precast concrete hybrid components.

[0020] Figure markings: 1-column unit, 11-column concrete, 111-square column concrete, 112-circular column concrete, 12-column stirrups, 13-column vertical bars, 14-column tension bars, 15-column welding section, 2-column tail unit, 21-column tail steel pipe, 22-inner lining ring, 3-column head unit, 31-column head steel pipe, 32-column head grouting hole, 33-column head welding nail, 34-observation exhaust hole, 4-steel beam joint, 5-anti-gravity grouting pipe, 6-core material, 7-frame column, 8-base plate, 9-foundation, 10-filling grouting section, 011-floor slab, 012-docking auxiliary parts. DETAILED DESCRIPTION

[0021] Take the case of multi-story industrial plant columns as an example. The design height of each floor of the plant building is 3.5m, and the design height of the pipeline layer is 3.8m. The plant frame structure is constructed by precast concrete mixed components. Figures 1 to 9As shown, the hybrid component can be divided into a column head unit 3, a column shaft unit 1 and a column tail unit 2. The column head unit 3 and the column tail unit 2 are both parts for assembly, and both have a reserved space for pouring concrete, i.e., grouting, during the assembly process. The column shaft unit 1 is a part mainly used for bearing, in which concrete is prefabricated and filled. The manufacturing process of the column shaft unit 1 is more complicated than that of the column head unit 3 and the column tail unit 2, so it is preferred to standardize the size specifications and / or process parameters of the column shaft unit 1 so as to reduce the production cost while ensuring that the technical performance requirements are met. At least one of the column head unit 3 and the column tail unit 2 can be designed to have different sizes according to the actual assembly requirements to adapt to various actual assembly requirements. Concrete is not filled in the column head unit 3 and the column tail unit 2, but space is reserved therein so as to fill concrete during assembly. In the stress-bearing process of the hybrid component, the steel pipe plays a restraining role on the concrete filling body, so that the concrete filling body is in a complex stress state, thereby improving the strength of the concrete, and greatly improving the plasticity and toughness properties.

[0022] like Figures 1 to 9 As shown, the prefabricated concrete mixed component comprises a column shaft unit 1 , a column foot unit 2 connected to the bottom of the column shaft unit 1 , and a column head unit 3 connected to the top of the column shaft unit 1 .

[0023] In this example, the column head unit 3 is designed to be 0.8m, the column shaft unit 1 is designed to be 2.5m, and the column tail unit 2 is designed to be 0.2m or 0.5m respectively. In the production process of the hybrid component, only the manufacturing process of the column tail unit 2 needs to be adjusted, and the column head unit 3 and the column shaft unit 1 can be regarded as standardized parts in the prefabricated structure. Alternatively, only the column head unit 3 is designed differently, and the column tail unit 2 and the column shaft unit 1 can be regarded as standardized parts in the prefabricated structure. Alternatively, it can be considered to adopt different designs for both the column head unit 3 and the column tail unit 2, and only the column shaft unit 1 can be regarded as a standardized part in the hybrid component.

[0024] The column unit 1 is a precast concrete column, and the column unit 1 includes a column concrete 11 and a steel cage inside the column concrete 11; Figure 4 and Figure 5 The column unit shown can be a square column concrete or a round column concrete. The steel cage is composed of column stirrups 12, column vertical bars 13 connected to the column stirrups 12 and arranged at intervals, and column tension bars 14 connected between the column vertical bars 13; wherein column welding sections 15 are arranged at both ends of the column vertical bars 13; the column welding sections 15 are respectively connected to the column tail steel pipe 21 and the column head steel pipe 31. Figure 8 and Fig. 9The welding part formed by welding the column vertical reinforcement 13 is shown in FIG. The welding part adopts double-sided welding. The length L of the part of the column vertical reinforcement 13 used to form the welding part meets the requirement of being greater than 5 times the steel bar diameter D of the column vertical reinforcement 13, that is, L>5D, thereby ensuring the welding strength at the welding part.

[0025] like Figure 3 As shown, a core material 6 is also arranged on the central axis of the column concrete 11, and the top and bottom of the core material 6 extend into the column head unit 3 and the column tail unit 2 respectively; the total height of the core material 6 is not greater than the total height of the mixed component. The core material 6 is a steel profile, and the steel profile is a straight line, T-shaped, I-shaped, H-shaped or square-shaped. In this embodiment, it is an H-shaped.

[0026] In this embodiment, an inner lining ring 22 is welded inside the column tail steel pipe 21, and the column tail steel pipe 21 and the inner lining ring 22 are combined into a column tail unit 2, and concrete is poured in the column tail unit 2; wherein one side of the inner lining ring 22 is connected to the column tail steel pipe 21, and the other side is protruded; the protruding length corresponds to the design length of the column head steel pipe 31 or the connection structure; the inner lining ring 22 plays a role of guiding, connecting and / or fixing. The length of the column tail steel pipe 21 corresponds to the connected column head steel pipe 31 and the size of the column tail steel pipe 21 corresponds to the size of the column body concrete 11.

[0027] In this embodiment, a column grouting hole 32 is provided at the bottom of the column steel pipe 31, and an observation vent hole 34 is provided at the top of the column steel pipe 31. The column steel pipe 31, the column grouting hole 32 and the observation vent hole 34 are combined into a column unit 3, and concrete is poured in the column unit 3. Figure 1 The figure shows an anti-gravity grouting pipe 5 inserted into the column grouting hole 32, but the anti-gravity grouting pipe 5 is not a component of the hybrid component, and the grouting operation using the anti-gravity grouting pipe 5 is performed at the assembly site rather than in the factory. Near the top end of the column cap unit 3, an observation exhaust hole 34 is opened. The observation exhaust hole 34 is used to exhaust air during the grouting process during assembly, and also serves as a grouting observation hole. In the column cap unit 3, the outer periphery of the column cap steel pipe 31 is connected to a steel beam joint 4 to facilitate hoisting, transportation, assembly and other operations of the hybrid component. The steel beam joint 4 and the column cap steel pipe 31 can be connected by various known means. Figure 1 3 shows an example of connecting a steel beam joint 4 and a column head steel pipe 31 together by a plurality of column head welding nails 33. To facilitate connection with other components, the longitudinal direction of the steel beam joint 4 is preferably perpendicular to the longitudinal direction of the hybrid component, that is, the steel beam joint 4 is preferably extended horizontally.

[0028] Among them, the counter-gravity grouting pipe 5 performs counter-gravity grouting. "Counter-gravity grouting" refers to a grouting process in which concrete slurry is injected from the bottom of the grouting space. The advantage of counter-gravity grouting is that it can effectively discharge the air in the filling grouting section 10 and avoid defects such as cavitation caused by residual air. However, due to the limitation of the dead weight of concrete, the counter-gravity grouting process is only applicable to the case where the grouting height is low. In this embodiment, the height of the filling grouting section 10 is generally not more than 1m or slightly higher than 1m, so it is suitable to adopt the counter-gravity grouting process.

[0029] In this embodiment, the size of the column head grouting hole 32 is adapted to the designed grouting amount and grouting speed, and the anti-gravity grouting pipe 5 can be detachably connected to the outer side of the column head grouting hole 32; at least one observation exhaust hole 34 is provided and is located on one side of the top of the column head steel pipe 31.

[0030] Combination Figures 1 to 23 , further illustrate the connection method of precast concrete hybrid components, the specific steps are as follows: Step 1: Establish a three-dimensional model according to the detailed drawing, divide it based on the three-dimensional model to determine the length of the column unit 1, and determine the number of column units 1 according to the overall height of the structure; and set a filling grouting section 10 at the joint between the head and tail of adjacent column units 1.

[0031] Step 2: prefabricate the column unit 1, make a steel cage through the column stirrups 12, column vertical bars 13 and column tension bars 14, and pour column concrete 11 of a certain length outside the steel cage; before pouring, check whether the protruding length of the column vertical bars 13 meets the design requirements.

[0032] When manufacturing the column shaft unit 1, first fix the column shaft vertical reinforcement 13 and the column shaft stirrup 12 to each other to form a frame structure; then use auxiliary parts such as templates to cover the periphery of the frame structure and perform concrete grouting. After the concrete is solidified, remove the auxiliary parts covering the periphery of the frame structure to form the column shaft unit 1. Figure 2 If the core material 6 is inserted into the frame structure formed by the column vertical reinforcement 13 and the column stirrup 12, and then grouting is performed, the Figure 3 The column shaft unit 1 is shown.

[0033] In addition, the lower end of the core material 6 can protrude from the lower end of the column tail unit 2, and the end of the core material 6 extends into the filling grouting section 10 and the extension length at least exceeds the corresponding steel beam bottom elevation. However, it is not limited to this, and the length of the core material 6 and the position of the core material 6 relative to the column shaft unit 1 can be flexibly designed according to actual needs.

[0034] Step 3: weld the inner lining ring 22 to the lower part of the column tail steel pipe 21, and make a part of the inner lining ring 22 protrude from the column tail steel pipe 21, thereby forming the column tail unit 2; then weld the column tail unit 2 to the column body vertical reinforcement 13 at the bottom of the column body unit 1; and fill and seal the joint between the column tail steel pipe 21 and the column body concrete 11.

[0035] A rib is connected inside the column cap steel pipe 31, and a column cap grouting hole 32 is drilled at the bottom of the column cap steel pipe 31, and an observation exhaust hole 34 is drilled at the top of the column cap steel pipe 31, thereby forming a column cap unit 3; the column cap unit 3 is welded and connected to the column body vertical reinforcement 13 at the top of the column body unit 1; and the joint between the column cap steel pipe 31 and the column body concrete 11 is filled and sealed.

[0036] Step 4: The column body unit 1 is connected to the column tail unit 2 and the column head unit 3 to form a prefabricated hybrid component, so that batch and standard intelligent assembly is carried out in the factory; and then actual construction is carried out on site.

[0037] In this embodiment, when the column head unit 3 and the column foot unit 2 are installed on the column shaft unit 1, the column head unit 3 is first installed on the column shaft unit 1, and then the column foot unit 2 is installed on the column shaft unit 1. Alternatively, the column head unit 3 and the column foot unit 2 can also be installed on the column shaft unit 1 at the same time. In addition, the column head steel pipe 31 or the column foot steel pipe 21 can also be welded to the column shaft unit 1 first, and then other components of the column head unit 3 and the column foot unit 2 can be supplemented.

[0038] Step 5: pre-connect the first column head unit 3 to the frame column 7 or foundation 9 on site, wherein a portion of the column head steel pipe 31 of the column head unit 3 is pre-buried inside the frame column 7 or foundation 9, and the other portion is set in a cavity; and the column head grouting hole 32 of the column head unit 3 is set near the top surface elevation of the frame column 7 or foundation 9.

[0039] Step six: install the assembled hybrid component on the first column head unit 3 through intelligent lifting equipment, and connect the first column head unit 3 through the inner lining ring 22 of the column tail unit 2; after installation, the column tail unit 2 and the first column head unit 3 form a filling grouting section 10, and install the anti-gravity grouting pipe 5 at the column head grouting hole 32 of the first column head unit 3, and then carry out grouting of the filling grouting section 10.

[0040] Step 7: A steel beam joint 4 is pre-welded at the column head unit 3 at the top of the hybrid component. After the grouting section 10 is cured and reaches the designed strength, the steel beam and floor slab 011 are installed here; then the next hybrid component is installed at the top of the hybrid component.

[0041] Step eight, the adjacent hybrid components are connected by the lining ring 22; the column head unit 3 at the bottom and the column tail unit 2 at the top form a filling grouting section 10, and then the anti-gravity grouting pipe 5 is installed at the column head grouting hole 32 at the column head unit 3 to perform grouting of the filling grouting section 10; thus, the hybrid components are connected in sequence from bottom to top until the entire structure connection and installation are completed.

[0042] During installation, docking auxiliary parts 012 are temporarily set on the column head steel pipe 31 and the column tail steel pipe 21 at the connection of the hybrid component. The docking auxiliary parts 012 include ear plates connected to the column head steel pipe 31, ear plates connected to the column tail steel pipe 21, and connecting rods pinned between the upper and lower ear plates; the docking auxiliary parts 012 are correspondingly arranged at annular intervals on the column head steel pipe 31 or the column tail steel pipe 21.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field can think of within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A prefabricated concrete hybrid component, characterized in that: It comprises a column shaft unit (1), a column tail unit (2) connected to the bottom of the column shaft unit (1), and a column head unit (3) connected to the top of the column shaft unit (1); The column shaft unit (1) is a prefabricated concrete column, and the column shaft unit (1) comprises column shaft concrete (11) and a steel cage inside the column shaft concrete (11); The steel cage is composed of column stirrups (12), column vertical bars (13) connected to the column stirrups (12) and arranged at intervals, and column tension bars (14) connected between the column vertical bars (13); Wherein, column welding sections (15) are provided at both ends of the column body vertical reinforcement (13); the column welding sections (15) are respectively connected to the column tail steel pipe (21) and the column head steel pipe (31); An inner lining ring (22) is connected to the interior of the column tail steel pipe (21), the column tail steel pipe (21) and the inner lining ring (22) are combined into a column tail unit (2), and concrete is poured in the column tail unit (2); A column cap grouting hole (32) is provided at the bottom of the column cap steel pipe (31), and an observation exhaust hole (34) is provided at the top of the column cap steel pipe (31). The column cap steel pipe (31), the column cap grouting hole (32) and the observation exhaust hole (34) are combined into a column cap unit (3), and concrete is poured in the column cap unit (3).

2. A precast concrete composite component according to claim 1, characterized in that: Both ends of the column shaft vertical reinforcement (13) extend out of the column shaft concrete (11), and the extending lengths correspond to the connection lengths with the column head steel pipe (31) and the column tail steel pipe (21), and the length of the column welding section (15) satisfies the requirement of being greater than 5 times the steel bar diameter of the column shaft vertical reinforcement (13).

3. A precast concrete hybrid component according to claim 1, characterized in that: A core material (6) is also arranged on the central axis inside the column body concrete (11), and the top and bottom of the core material (6) extend into the column head unit (3) and the column tail unit (2) respectively; the total height of the core material (6) is not greater than the total height of the mixed component.

4. A precast concrete hybrid component according to claim 3, characterized in that: The core material (6) is a steel profile, and the steel profile is in the shape of a straight line, a T-shape, an I-shape, an H-shape or a square shape.

5. The precast concrete composite component according to claim 1, characterized in that: The length of the column tail steel pipe (21) is set corresponding to the connected column head steel pipe (31), and the size of the column tail steel pipe (21) is set corresponding to the size of the column body concrete (11); an inner lining ring (22) is welded inside the column tail steel pipe (21), one side of the inner lining ring (22) is connected to the column tail steel pipe (21), and the other side is protruding; the protruding length is set corresponding to the designed length of the column head steel pipe (31) or the connecting structure.

6. A precast concrete hybrid component according to claim 1, characterized in that: The size of the column head grouting hole (32) is adapted to the designed grouting volume and grouting speed, and the outer side of the column head grouting hole (32) can be detachably connected to the anti-gravity grouting pipe (5); at least one observation and exhaust hole (34) is provided and is located on one side of the top of the column head steel pipe (31).

7. The precast concrete composite component according to claim 1, characterized in that: The size of the column head steel pipe (31) is set to correspond to the size of the column body concrete (11) and is also connected to a steel beam on the outside. Ribs are set inside the column head steel pipe (31) at the top and bottom elevations of the steel beam; the ribs are square-shaped plates.

8. A method for connecting precast concrete composite components according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: Step 1: establishing a three-dimensional model according to the detailed drawings, dividing the three-dimensional model to determine the length of the column unit (1), and determining the number of the column unit (1) according to the overall height of the structure; providing a filling grouting section (10) at the joint between the head and tail of adjacent column units (1); Step 2: prefabricate the column unit (1), make a steel cage by using column stirrups (12), column vertical bars (13) and column tension bars (14), and pour column concrete (11) of a certain length outside the steel cage; before pouring, check whether the extension length of the column vertical bars (13) meets the design requirements; Step 3: Weld an inner lining ring (22) to the lower middle part of the column tail steel pipe (21), and partially protrude the inner lining ring (22) from the column tail steel pipe (21), thereby forming a column tail unit (2); then weld the column tail unit (2) to the column shaft vertical reinforcement (13) at the bottom of the column shaft unit (1); and fill and seal the joint between the column tail steel pipe (21) and the column shaft concrete (11); A rib plate is connected inside the column head steel pipe (31), a column head grouting hole (32) is drilled at the bottom of the column head steel pipe (31), and an observation exhaust hole (34) is drilled at the top of the column head steel pipe (31), thereby forming a column head unit (3); the column head unit (3) is welded to the column body vertical reinforcement (13) at the top of the column body unit (1); and the joint between the column head steel pipe (31) and the column body concrete (11) is filled and sealed; Step 4: The column body unit (1) is respectively connected to the column tail unit (2) and the column head unit (3) to form a prefabricated hybrid component, so that batch and standard intelligent assembly is carried out in the factory; and then actual construction is carried out on site; Step 5: pre-connect the first column head unit (3) to the frame column (7) or foundation (9) on site, wherein a portion of the column head steel pipe (31) of the column head unit (3) is pre-buried inside the frame column (7) or foundation (9), and the other portion is arranged in a cavity; and the column head grouting hole (32) of the column head unit (3) is arranged near the top surface elevation of the frame column (7) or foundation (9); Step 6: Install the assembled hybrid component on the first column head unit (3) through the intelligent lifting equipment, and connect the first column head unit (3) through the inner lining ring (22) of the column tail unit (2); after installation, the column tail unit (2) and the first column head unit (3) form a filling grouting section (10), install the anti-gravity grouting pipe (5) at the column head grouting hole (32) of the first column head unit (3), and then perform grouting of the filling grouting section (10); Step 7: A steel beam joint (4) is pre-welded at the column head unit (3) at the top of the hybrid component. After the grouting section (10) is cured and reaches the designed strength, the steel beam and floor slab (011) are installed; and then the next hybrid component is installed at the top of the hybrid component. Step eight, the adjacent hybrid components are butt-connected by the inner lining ring (22); the column head unit (3) at the bottom and the column tail unit (2) at the top form a filling grouting section (10), and then an anti-gravity grouting pipe (5) is installed at the column head grouting hole (32) at the column head unit (3) to perform grouting of the filling grouting section (10); In this way, the hybrid components are connected sequentially from bottom to top until the entire structural connection and installation is completed.

9. A method for connecting precast concrete composite components according to claim 8, characterized in that: A core material (6) is also provided in the column shaft unit (1), and an end of the core material (6) extends into the filling grouting section (10) and the extending length at least exceeds the bottom elevation of the corresponding steel beam.

10. A method for connecting precast concrete hybrid components according to claim 9, characterized in that: During installation, a docking auxiliary component (012) is temporarily provided on the column head steel pipe (31) and the column tail steel pipe (21) at the connection of the hybrid component. The docking auxiliary component (012) comprises an ear plate connected to the column head steel pipe (31), an ear plate connected to the column tail steel pipe (21), and a connecting rod pinned between the upper and lower ear plates. The docking auxiliary component (012) is correspondingly provided at annular intervals on the column head steel pipe (31) or the column tail steel pipe (21).

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