Precast concrete composite component and connection method thereof

Abstract

The present invention discloses a precast concrete hybrid component and a connection method thereof, wherein the precast concrete hybrid 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 reinforcement, and the column body vertical reinforcement connects the column tail unit and the column head unit; 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 body unit, the column tail unit and the column head unit; the column body unit can be prefabricated and mass-produced according to the height and strength of the construction, thereby ensuring construction quality and saving construction time; the arrangement of the column head unit and the column body unit facilitates on-site assembly and makes the connection node more stable through on-site casting, and the integrated integrity of the structure is stronger; the arrangement of the extended section of the vertical reinforcement facilitates the butt connection and fixation of the column body unit, the column tail unit and the column head unit.

Description

Technical Field

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

[0002] Construction projects require extensive on-site construction. For example, concrete is poured onto steel frames on-site to create building components such as columns, supports, and floor slabs. Because the concrete pouring process takes a significant amount of time and is susceptible to adverse effects from inclement weather like rain and snow, traditional construction is time-consuming. Furthermore, quality issues can easily arise from human factors during on-site construction. Common quality issues include uneven concrete pouring and improperly tied steel bars.

[0003] To overcome these problems and improve construction efficiency, a construction method using hybrid components has emerged. For example, hybrid components such as load-bearing columns, brackets, and floor panels can be prefabricated in a factory using steel, and then 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 simultaneously with on-site construction, thus saving a large amount 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 curing conditions of the concrete, thereby improving the strength and durability of the hybrid components.

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

[0005] The present invention provides a prefabricated concrete mixed component and a connection method thereof, which are used to solve technical problems such as standardized production, assembled installation and grouting connection at connection points of concrete mixed columns.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A precast concrete composite component comprises a column unit, a column foot unit connected to the bottom of the column unit, and a column head unit connected to the top of the column unit;

[0008] The column unit is a precast concrete column, and the column unit comprises column concrete and a steel cage inside the column concrete;

[0009] 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.

[0010] Column welding sections are provided at both ends of the column vertical reinforcement; the column welding sections are respectively connected to the column tail steel pipe and the column head steel pipe;

[0011] An inner lining ring is connected to the interior of 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;

[0012] A column cap grouting hole is provided at the bottom of the column cap steel pipe, and an observation exhaust hole is provided 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.

[0013] Furthermore, both ends of the column vertical reinforcement extend out of the column concrete, and the extension length corresponds to the connection length of 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.

[0014] Furthermore, a core material is provided 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 hybrid component.

[0015] Furthermore, the core material is a steel section, and the steel section is in the shape of a straight line, a T-shape, an I-shape, an H-shape or a square shape.

[0016] 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 setting of the column body concrete; 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.

[0017] Furthermore, the size of the column head grouting hole is adapted to the designed grouting volume and grouting speed, and the anti-gravity grouting pipe can be detachably connected to the outside of the column head grouting hole; at least one observation and exhaust hole is provided and is located on one side of the top of the column head steel pipe.

[0018] Furthermore, the size of the column head steel pipe corresponds to the size of the column body concrete and is connected to a steel beam on the outside. Ribs are provided inside the column head steel pipe at the top and bottom elevations corresponding to the steel beam; the ribs are U-shaped plates.

[0019] Furthermore, the connection method of precast concrete composite components has the following specific steps:

[0020] Step 1: Create a 3D model based on the detailed drawings, divide the column units based on the 3D model to determine the length, and determine the number of column units based on the overall height of the structure; set a filling grouting section at the junction of adjacent column units;

[0021] Step 2: Prefabricate the column unit, make a steel cage with column stirrups, column vertical bars and column tension bars, and pour column concrete of a certain length outside the steel cage; before pouring, check that the extension length of the column vertical bars meets the design requirements;

[0022] Step 3: Weld an inner lining ring to the lower part of the column tail steel pipe, and partially protrude the inner lining ring from the column tail steel pipe to form 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;

[0023] A rib 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 and 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;

[0024] Step 4: The column body unit is connected to the column foot 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; then the actual construction is carried out on site;

[0025] Step 5: Pre-connect the first column head unit to the frame column or foundation on site. Part of the column head steel pipe of this column head unit is pre-buried inside the frame column or foundation, and the other part is set in a cavity; and the column head grouting hole of this column head unit is set near the top surface elevation of the frame column or foundation;

[0026] Step 6: Install the assembled hybrid component on the first column head unit using intelligent lifting equipment, and connect the first column head unit through the inner 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;

[0027] Step 7: A steel beam joint is pre-welded at the column head unit at the top of the composite component. After the grouting section is cured and reaches the design strength, the steel beam and floor slab are installed here; then the next composite component is installed at the top of the composite component;

[0028] 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 carry out grouting of the filling grouting section; thus, the hybrid components are connected in sequence from bottom to top until the entire structure connection and installation is completed.

[0029] Furthermore, a core material is provided in the column unit, and an end portion 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.

[0030] 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.

[0031] The beneficial effects of the present invention are embodied in:

[0032] 1) The present invention, through the arrangement of the column shaft unit, the column foot unit, and the column head unit, not only ensures standardized prefabrication based on existing construction, but also facilitates on-site assembly-type construction. The column shaft unit can be prefabricated and mass-produced according to the height and strength of the construction, ensuring construction quality and saving construction time. The arrangement of the column head unit and the column shaft unit facilitates on-site assembly, and the on-site casting makes the connection nodes more stable, and the structural integrity is more integrated.

[0033] 2) The present invention facilitates the butt connection and fixation of the column shaft unit, column foot unit, and column head unit by providing the extended section of the vertical reinforcement, and further ensures the integrity and stress strength of the connection by providing the core material;

[0034] 3) The present invention uses a counter-gravity grouting method for grouting, which is beneficial to filling the grouting section formed by the connection point to ensure the strength of the connection point; further, the integral connection between the steel pipe and the concrete is improved by the provision of ribs.

[0035] 4) The present invention produces concrete components in a factory, which can be carried out simultaneously with on-site foundation construction, thereby reducing the time of on-site operations and improving construction efficiency. When on-site construction conditions are met, prefabricated frames can be quickly installed using hybrid components, greatly shortening the construction period of the entire project; and through standardized production, standardized and intelligent production processes and a strict quality control system, the dimensional accuracy and quality stability of the hybrid components can be ensured. In addition, factory production can accurately control the amount of materials used and reduce waste. The hybrid components adopt an optimized design and production process, which can maximize material savings while ensuring structural strength. It is also beneficial to environmental protection and energy conservation, reducing construction waste. Less construction waste is generated during the production process of hybrid components. The factory can recycle waste materials, reducing pollution to the environment.

[0036] In addition, the prefabricated frame has better seismic performance. Hybrid components can improve the seismic performance of buildings through reasonable design and connection methods. The connection between hybrid components adopts a reliable node structure, which can effectively transmit seismic 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 in part will become obvious from the description, or can 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 specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of precast concrete composite components;

[0038] Figure 2 It is a schematic diagram of the column unit structure;

[0039] Figure 3 It is a schematic diagram of a column unit containing core material;

[0040] Figure 4 It is a schematic diagram of the cross section of a square column unit;

[0041] Figure 5 It is a schematic diagram of the cross section of a circular column unit;

[0042] Figure 6 It is a schematic diagram of the column tail unit structure;

[0043] Figure 7 It is a schematic diagram of the column head unit structure;

[0044] Figure 8 It is a schematic diagram of the connection structure between the column body unit and the column tail unit;

[0045] Figure 9It is a schematic diagram of the connection structure between the column body unit containing the core material and the column tail unit;

[0046] Figure 10 This is a schematic diagram of the installation of the first column head unit at the frame column (a) and foundation (b);

[0047] Figure 11 Schematic diagram of the installation of mixed components at the frame column (a) and foundation (b);

[0048] Figure 12 Schematic diagram of grouting construction of mixed components at frame columns (a) and foundations (b);

[0049] Figure 13 Schematic diagram of steel beam and floor slab installation after grouting of composite components at frame columns (a) and foundations (b);

[0050] Figure 14 Schematic diagram of the installation of the second composite component at the frame column (a) and foundation (b);

[0051] Figure 15 Schematic diagram of grouting of the second hybrid component at the frame column (a) and foundation (b);

[0052] Figure 16 Schematic diagram of the installation of composite components at the frame column (a) and foundation (b) in sequence;

[0053] Figure 17 Schematic diagram of the installation of composite components with core materials at the frame column (a) and foundation (b);

[0054] Figure 18 Schematic diagram of grouting construction of composite components containing core materials at frame columns (a) and foundations (b);

[0055] Figure 19 Schematic diagram of the installation of steel beams and floor slabs after grouting of composite components containing core materials at the frame columns (a) and foundations (b);

[0056] Figure 20 Schematic diagram of the installation of the second composite component with core material at the frame column (a) and foundation (b);

[0057] Figure 21 Schematic diagram of grouting of the second composite component with core material at the frame column (a) and foundation (b);

[0058] Figure 22 Schematic diagram of the sequential installation of composite components with core materials at the frame column (a) and foundation (b);

[0059] Figure 23 It is a schematic diagram of the 3D software model of precast concrete composite components.

[0060] Figure markings: 1-column unit, 11-column concrete, 111-square column concrete, 112-cylinder concrete, 12-column stirrups, 13-column vertical reinforcement, 14-column tension reinforcement, 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

[0061] 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 using precast concrete composite components. Figures 1 to 9 As shown, the hybrid component can be divided into a capital unit 3, a shaft unit 1, and a foot unit 2. The capital unit 3 and foot unit 2 are both used for assembly, and both have reserved spaces for pouring concrete, i.e., grouting, during the assembly process. The shaft unit 1 is the main load-bearing part and is prefabricated and filled with concrete. The manufacturing process of the shaft unit 1 is more complex than that of the capital unit 3 and foot unit 2. Therefore, it is preferable to standardize the dimensions and / or process parameters of the shaft unit 1 to ensure that technical performance requirements are met while reducing production costs. At least one of the capital unit 3 and foot unit 2 can be designed to have different sizes according to actual assembly requirements to accommodate various actual assembly requirements. Neither the capital unit 3 nor the foot unit 2 is filled with concrete, but rather has spaces reserved therein for filling with concrete during assembly. During the stress-bearing process of the hybrid component, the steel pipe constrains the concrete filling, placing the concrete filling in a complex stress state, thereby increasing the strength of the concrete and significantly improving its plasticity and toughness properties.

[0062] like Figures 1 to 9 As shown, the precast concrete composite component includes 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 .

[0063] 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 foot unit 2 is designed to be 0.2m or 0.5m respectively. During the production process of the hybrid component, only the manufacturing process of the column foot unit 2 needs to be adjusted. At this time, the column head unit 3 and the column shaft unit 1 can be regarded as standardized parts of the prefabricated structure. Alternatively, only the column head unit 3 can be designed differently. At this time, the column foot unit 2 and the column shaft unit 1 can be regarded as standardized parts of the prefabricated structure. Alternatively, it is possible to consider adopting different designs for both the column head unit 3 and the column foot unit 2. At this time, only the column shaft unit 1 can be regarded as a standardized part of the hybrid component.

[0064] 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 made of square or circular concrete. The steel cage is composed of column stirrups 12, column vertical bars 13 connected to and spaced apart from the stirrups 12, and column tie bars 14 connected between the vertical bars 13. Column welded sections 15 are provided at both ends of the vertical bars 13. These welded sections 15 are connected to the column tail steel pipe 21 and the column head steel pipe 31, respectively. Figure 8 and Figure 9 The figure shows the welded portion formed by the column vertical bars 13. The welded portion is welded on both sides. The length L of the welded portion of the column vertical bars 13 is greater than five times the diameter D of the column vertical bars 13, i.e., L>5D. This ensures weld strength at the welded portion.

[0065] like Figure 3 As shown, a core material 6 is disposed on the central axis of the column concrete 11. The top and bottom of the core material 6 extend into the column head unit 3 and the column foot unit 2, respectively. The total height of the core material 6 is no greater than the total height of the composite structure. The core material 6 is a steel profile, which can be in the shape of a straight line, T, I, H, or square. In this embodiment, the profile is H-shaped.

[0066] In this embodiment, an inner liner ring 22 is welded inside the column tail steel pipe 21. The column tail steel pipe 21 and the inner liner ring 22 are combined to form a column tail unit 2, and concrete is later poured into the column tail unit 2. One side of the inner liner ring 22 is connected to the column tail steel pipe 21, and the other side is protruded. The protruding length corresponds to the designed length of the column head steel pipe 31 or the connecting structure. The inner liner ring 22 plays a guiding, connecting and / or fixing role. 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.

[0067] In this embodiment, a column grouting hole 32 is provided at the bottom of the column steel pipe 31, and an observation and exhaust 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 and exhaust 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 head unit 3, an observation exhaust hole 34 is provided. 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 head unit 3, the outer periphery of the column head steel pipe 31 is connected to a steel beam joint 4 to facilitate hoisting, transportation, assembly and other operations of the hybrid component. Various known means can be used to connect the steel beam joint 4 and the column head steel pipe 31. 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. In order 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.

[0068] 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 expel the air in the filling grouting section 10, avoiding defects such as cavitation caused by residual air. However, due to the limitation of the deadweight of the concrete, the counter-gravity grouting process is only applicable to situations where the grouting height is low. In this embodiment, the height of the filling grouting section 10 generally does not exceed 1m or is slightly higher than 1m, so the counter-gravity grouting process is suitable.

[0069] In this embodiment, the size of the column head grouting hole 32 is adapted to the designed grouting volume and grouting speed, and the anti-gravity grouting pipe 5 can be detachably connected to the outside 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.

[0070] Combine Figures 1 to 23 , further explain the connection method of precast concrete composite components, the specific steps are as follows:

[0071] Step 1: Create a three-dimensional model based on the detailed drawing, divide the column unit 1 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; set a filling grouting section 10 at the junction of adjacent column units 1.

[0072] Step 2: Prefabricate the column unit 1, make a steel cage with 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 that the extension length of the column vertical bars 13 meets the design requirements.

[0073] When manufacturing the column unit 1, first fix the column vertical reinforcement 13 and the column 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 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 result is Figure 3 The column unit 1 is shown.

[0074] Furthermore, 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 can extend into the filling grouting section 10, and the extension length at least exceeds the bottom elevation of the corresponding steel beam. However, this is not limited to this, and the length of the core material 6 and its position relative to the column shaft unit 1 can be flexibly designed according to actual needs.

[0075] 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.

[0076] 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 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.

[0077] 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.

[0078] In this embodiment, when installing the column head unit 3 and the column foot unit 2 onto the column shaft unit 1, the column head unit 3 is first installed onto the column shaft unit 1, and then the column foot unit 2 is installed onto the column shaft unit 1. Alternatively, the column head unit 3 and the column foot unit 2 can be installed onto the column shaft unit 1 simultaneously. In addition, the column head steel pipe 31 or the column foot steel pipe 21 can be welded to the column shaft unit 1 first, and then the other components of the column head unit 3 and column foot unit 2 can be added.

[0079] Step 5. Pre-connect the first column head unit 3 to the frame column 7 or foundation 9 on site. A portion of the column head steel pipe 31 of this 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 this column head unit 3 is set near the top surface elevation of the frame column 7 or foundation 9.

[0080] 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, 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.

[0081] 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.

[0082] 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 is completed.

[0083] 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.

[0084] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A precast concrete composite component, characterized in that: It comprises a column body unit (1), a column tail unit (2) connected to the bottom of the column body unit (1), and a column head unit (3) connected to the top of the column body unit (1); The column unit (1) is a precast concrete column, and the column unit (1) comprises column concrete (11) and a steel cage inside the column concrete (11); A core material (6) is also provided in the column unit (1), and the 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; 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 into the column tail unit (2); 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 into the column unit (3); Both ends of the column body vertical reinforcement (13) extend out of the column body concrete (11), and the extension 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 diameter of the column body vertical reinforcement (13); The size of the column head steel pipe (31) is set to correspond to the size of the column body concrete (11) and is further connected to a steel beam on the outside. Ribs are set inside the column head steel pipe (31) at the top and bottom elevations corresponding to the steel beam; the ribs are U-shaped plates.

2. A precast concrete composite component according to claim 1, characterized in that: A core material (6) is also provided 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.

3. The precast concrete composite component according to claim 1, wherein: The core material (6) is a steel section, and the steel section is in the shape of a straight line, a T-shape, an I-shape, an H-shape or a square shape.

4. The precast concrete composite component according to claim 1, wherein: The length of the column tail steel pipe (21) corresponds to the setting of the connected column head steel pipe (31), and the size of the column tail steel pipe (21) corresponds to the setting of 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 corresponds to the design length of the column head steel pipe (31) or the connection structure.

5. The precast concrete composite component according to claim 1, wherein: 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) is 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).

6. A method for connecting precast concrete composite components according to any one of claims 1 to 5, characterized in that: The specific steps are as follows: Step 1: Establish a three-dimensional model based on the detailed drawing, divide the column unit (1) based on the three-dimensional model to determine the length of the column unit (1), and determine the number of the column unit (1) according to the overall height of the structure; and provide a filling grouting section (10) at the junction of 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 portion 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 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); A rib is connected inside the column head steel pipe (31), a column head grouting hole (32) is punched at the bottom of the column head steel pipe (31), and an observation vent hole (34) is punched 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 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 provided in a cavity; and the column head grouting hole (32) of the column head unit (3) is provided near the top 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, adjacent hybrid component joints are butt-connected by an inner lining ring (22); a filling grouting section (10) is formed by the column head unit (3) at the bottom and the column tail unit (2) at the top, and then a counter-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 in sequence from bottom to top until the entire structural connection and installation is completed.

7. A method for connecting precast concrete composite components according to claim 6, 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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