CN112922235A - Fabricated concrete prefabricated column and construction method thereof - Google Patents
Fabricated concrete prefabricated column and construction method thereof Download PDFInfo
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- CN112922235A CN112922235A CN202110122186.8A CN202110122186A CN112922235A CN 112922235 A CN112922235 A CN 112922235A CN 202110122186 A CN202110122186 A CN 202110122186A CN 112922235 A CN112922235 A CN 112922235A
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- column
- prefabricated
- prefabricated column
- hoop
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
- E04C5/0618—Closed cages with spiral- or coil-shaped stirrup rod
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses an assembly type concrete prefabricated column and a construction method thereof, wherein the construction method of the assembly type concrete prefabricated column comprises the following steps: arranging longitudinal bars and binding or welding spiral stirrups outside the longitudinal bars to form a reinforcement cage; a hoop plate is sleeved outside the reinforcement cage and connected with the reinforcement cage; erecting a formwork and pouring concrete to form the prefabricated column; hoisting the upper prefabricated column of the prefabricated column to be right above the lower prefabricated column of the prefabricated column; and welding and connecting the hoop plate of the upper column of the prefabricated column and the hoop plate of the lower column of the prefabricated column. A reinforcement cage formed by welding longitudinal bars and spiral stirrups is used as a framework of the prefabricated column, so that the axial bearing capacity, the bending resistance bearing capacity and the shearing resistance bearing capacity of the prefabricated column are effectively guaranteed; the prefabricated column can be prefabricated in factories and other places, only the hoisting butt joint and the welding connection of the upper column and the lower column of the prefabricated column are carried out on a construction site, the processes are few, the construction difficulty is low, and the construction efficiency is high.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a construction method of an assembly type concrete precast column. In addition, the invention also relates to an assembled concrete prefabricated column applying the assembled concrete prefabricated column construction method.
Background
The site construction has the characteristics of low production efficiency, high resource waste rate, poor quality control, large environmental influence and the like, so that the assembled building is produced by increasing the production efficiency and the construction quality and reducing the environmental pollution and the material efficiency.
In order to ensure the integral stress performance of the fabricated building, the members are connected through the nodes so as to be stressed together in a load state. Because the stress mechanism of the building structure is complex, the node is usually in a non-single stress state, and the node is required to have enough strength and rigidity, so that the complex stress is transmitted while the small deformation is ensured.
Existing fabricated concrete structures primarily include dry and wet joints. Wherein, the dry connection is welding or bolt connection, the construction steps are complex, and the connection quality is easily influenced by materials and operation techniques; the wet connection is post-cast concrete, and the concrete pouring needs to use a template, so that the construction process is complex, the operation is complex, the construction requirement is high, and the construction progress is seriously influenced.
In summary, how to reduce the construction difficulty of the fabricated concrete precast column and improve the construction efficiency is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention aims to provide a construction method of an assembly type concrete precast column, which is low in construction difficulty and high in construction efficiency by pre-producing an upper precast column and a lower precast column and connecting the precast columns at two sides through welding hoop plates.
In addition, the invention also provides an assembled concrete precast column applying the assembled concrete precast column construction method.
In order to achieve the above purpose, the invention provides the following technical scheme:
a construction method of an assembly type concrete precast column comprises the following steps:
arranging longitudinal bars and bundling or welding spiral stirrups outside the longitudinal bars to form a reinforcement cage;
a hoop plate is sleeved outside the reinforcement cage and connected with the reinforcement cage;
erecting a formwork and pouring concrete to form the prefabricated column;
hoisting the prefabricated column upper column of the prefabricated column to be right above the prefabricated column lower column of the prefabricated column;
and welding and connecting the hoop plate of the prefabricated column upper column with the hoop plate of the prefabricated column lower column.
Preferably, the connecting the reinforcement cage and the hoop plate includes:
connecting the reinforcement cage and the hoop plate through a circumferential reinforcing plate;
or the reinforcement cage and the hoop plate are connected by using counter-pulling anchor bars.
Preferably, the inner side surface of the hoop plate is provided with a plug welding hole, and two ends of the split anchor bar are connected with the plug welding hole in a plug welding mode or in a threaded mode.
Preferably, the prefabricated column is a centrifugal prefabricated column, and a cylindrical cavity is arranged in the center of the prefabricated column.
Preferably, concrete is poured into the cylindrical cavity.
Preferably, the cylindrical cavity is subjected to roughening treatment.
An assembled concrete prefabricated column comprises a prefabricated column upper column and a prefabricated column lower column, wherein the prefabricated column upper column and the prefabricated column lower column respectively comprise a concrete main body, a longitudinal rib and a spiral stirrup sleeved outside the longitudinal rib;
hoop plates are circumferentially welded outside the connecting section of the upper column of the prefabricated column and the connecting section of the lower column of the prefabricated column, hoop plates are provided with hoop reinforcing plates or split anchor bars at the connecting end surfaces of the upper column of the prefabricated column and the lower column of the prefabricated column, and the longitudinal bars are fixedly connected to the inner side surfaces of the hoop plates or the hoop reinforcing plates;
the inner side surface of the hoop plate is provided with a plurality of pegs.
Preferably, the hoop reinforcing plate is provided with a longitudinal bar mounting hole for mounting the longitudinal bar, and the longitudinal bar penetrates through the longitudinal bar mounting hole and then is connected with the hoop reinforcing plate.
Preferably, a lining steel pipe is arranged between the connecting end face of the upper column of the prefabricated column and the connecting end face of the lower column of the prefabricated column.
According to the construction method of the fabricated concrete precast column, the longitudinal reinforcements and the spiral stirrups are welded to form the reinforcement cage which is used as the framework of the precast column, so that the axial bearing capacity, the bending resistance bearing capacity and the shearing resistance bearing capacity for resisting horizontal shearing force of the precast column are effectively guaranteed, and the structural strength of the precast column after construction is guaranteed.
Meanwhile, the prefabricated column can be prefabricated and produced in factories and other places, only the hoisting butt joint and the welding connection of the upper column and the lower column of the prefabricated column are carried out on a construction site, the processes are few, the construction difficulty is low, and the construction efficiency is high.
In addition, the invention also provides an assembled concrete precast column applying the assembled concrete precast column construction method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a first embodiment of an assembled concrete precast column provided by the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the fabricated concrete precast column provided by the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of the fabricated concrete precast column provided by the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of the fabricated concrete precast column provided by the present invention;
FIG. 5 is a schematic structural diagram of a fifth embodiment of the fabricated concrete precast column provided by the present invention;
FIG. 6 is a schematic structural diagram of a sixth embodiment of the fabricated concrete precast column provided by the present invention;
fig. 7 is a schematic structural diagram of a seventh embodiment of the fabricated concrete precast column provided by the invention.
In fig. 1-7:
01 for prefabricated post upper prop, 02 for prefabricated post lower prop, 1 for concrete body, 11 for the cylinder cavity, 2 for indulging the muscle, 3 for the spiral stirrup, 4 for the hoop board, 41 for the peg, 5 for the hoop reinforcing plate, 6 for vertical stiffening rib.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a construction method of an assembled concrete prefabricated column, which is characterized in that an upper prefabricated column and a lower prefabricated column are produced in advance, and prefabricated columns on two sides are connected through welding hoop plates, so that the construction difficulty is low and the construction efficiency is high.
In addition, the invention also provides an assembled concrete precast column applying the assembled concrete precast column construction method.
Please refer to fig. 1-7.
The invention provides a construction method of an assembly type concrete precast column, which comprises the following steps:
step S1, arranging longitudinal bars 2 and binding or welding spiral stirrups 3 outside the longitudinal bars 2 to form a reinforcement cage;
step S2, sleeving a hoop plate 4 outside the reinforcement cage, and connecting the reinforcement cage and the hoop plate 4;
step S3, erecting a formwork and pouring concrete to form the prefabricated column;
step S4, hoisting the prefabricated column upper column 01 of the prefabricated column to be right above the prefabricated column lower column 02 of the prefabricated column;
and step S5, welding and connecting the hoop plate 4 of the prefabricated column upper column 01 and the hoop plate 4 of the prefabricated column lower column 02.
The steps S1-S3 are the production and pouring process of the prefabricated column and can be finished in advance in a factory and the like; the steps S4-S5 are the construction connection process of the prefabricated column and need to be completed on the construction site.
It should be noted that in step S1, the longitudinal ribs 2 are arranged along the axial direction of the precast column and are mainly used for bearing axial force and bending moment, and the number and distribution of the longitudinal ribs 2 determine the bearing capacity of the precast column; the spiral stirrup 3 is sleeved outside the longitudinal rib 2, can bear horizontal shearing force when positioning the longitudinal rib 2, and has stronger shearing resistance compared with rectangular stirrups distributed equidistantly in the length direction of the longitudinal rib 2, thereby being favorable for optimizing the structural performance of the prefabricated column.
Preferably, the longitudinal bars 2 may include common hot rolled steel bars, high-strength steel bars, steel strands, high-strength steel rods, steel wire bundles, or fiber bars, and the specific type and size of the longitudinal bars 2 are determined according to the design strength requirement of the precast column.
The spiral stirrup 3 can be set to be ordinary steel bars, high-strength steel bars, steel wire ropes, steel strands, steel wire bundles or FRP fibers and the like, and the specific type and size of the spiral stirrup 3 are determined according to the design strength requirement of the prefabricated column.
It should be noted that in step S2, the hoop plate 4 is disposed around the outer circumference of the concrete body 1, and the shape and size of the hoop plate 4 are determined according to the sectional shape and size of the concrete body 1. Because the cross-section of precast column is mostly the rectangle, hoop plate 4 is four steel sheet head and the tail welding or steel sheet welded connection after buckling generally forms. In order to enhance the connection strength between the hoop plate 4 and the poured concrete body 1, the inner side surface of the hoop plate 4 is provided with studs 41, and the studs 41 are uniformly distributed along the axial direction of the concrete body 1.
The steel reinforcement cage is connected through the hoop reinforcement with the hoop board 4, and is preferred, can be through hoop reinforcing plate 5 connection steel reinforcement cage and hoop board 4, or utilize to drawing anchor bar connection steel reinforcement cage and hoop board 4.
The circumferential reinforcement plate 5 may be welded to one end of the hoop plate 4, as shown in fig. 1; or welded to both ends of the band plate 4, as shown in fig. 4; it may be welded to any position between both end surfaces of the hoop plate 4 as shown in FIG. 2.
Preferably, the inner side surface of the hoop plate 4 is provided with a hole, and two ends of the counter-pull anchor bar are connected with the hole in a plug welding mode or in a threaded mode.
It should be noted that in step S3, the reinforcement cage and the hoop plate 4 are connected to form a reinforcement frame of the precast column, a formwork is erected outside the reinforcement frame according to the design size of the precast column, and concrete is poured to form the precast column upper column 01 and the precast column lower column 02.
The type of the poured concrete can be ordinary concrete or high-strength concrete such as C60 or C80 according to the design requirements of the precast column, and is not described herein again.
In this embodiment, utilize and indulge muscle 2 and spiral stirrup 3 ligature or welding formation steel reinforcement cage, as the skeleton of prefabricated post, ensured the bearing capacity of prefabricated post effectively.
Meanwhile, the prefabricated column can be prefabricated in a factory and the like, only the hoisting butt joint and the welding connection of the upper column 01 and the lower column 02 of the prefabricated column are carried out on a construction site, the process is few, the construction difficulty is low, and the construction efficiency is high.
Preferably, the longitudinal bars 2 may be pre-tensioned to form a pre-stressed column. And tensioning the longitudinal ribs 2 after the concrete is poured, and loosening tensioning heads after the concrete is cured to complete tensioning.
On the basis of the above embodiment, in order to further improve the structural strength of the prefabricated column, please refer to fig. 4 and 5, the prefabricated column may be a centrifugally formed prefabricated column, and a cylindrical cavity 11 is formed in the center of the prefabricated column.
After the concrete pouring is completed, the mold is closed, the prefabricated column is obtained through a centrifugal method, and the prefabricated column is maintained after being formed.
In this embodiment, the precast column extrudes excessive moisture under the centrifugal action, effectively improves the compactness and the strength of concrete, thereby enhancing the structural strength of the precast column.
Since the prefabricated column produced by the centrifugal method is provided with the cylindrical cavity 11 at the center, preferably, concrete can be poured into the cylindrical cavity 11 to fill the cylindrical cavity 11 and enhance the structural strength of the prefabricated column, as shown in fig. 6 and 7.
The concrete is poured in the cylindrical cavity 11, either after the welding connection of the hoop plates 4 of the prefabricated column or before the welding connection of the hoop plates 4 of the prefabricated column.
In order to enhance the connection strength between the post-cast concrete in the cylindrical cavity 11 and the prefabricated column main body 1, preferably, the cylindrical cavity 11 of the prefabricated column is subjected to roughening treatment.
The galling treatment can be carried out after the prefabricated column is formed, and can also be carried out in the prefabricated column forming process.
In addition to the construction method of the prefabricated concrete column, the invention also provides the prefabricated concrete column, which comprises a prefabricated upper column 01 and a prefabricated lower column 02, wherein the prefabricated upper column 01 and the prefabricated lower column 02 both comprise a concrete main body 1, longitudinal ribs 2 and spiral stirrups 3 sleeved outside the longitudinal ribs 2; hoop plates 4 are sleeved outside the connecting sections of the upper column 01 and the lower column 02 of the prefabricated column in an annular direction, hoop plates 4 are provided with annular reinforcing plates 5 or split anchor bars at the connecting end surfaces of the upper column 01 and the lower column 02 of the prefabricated column, and longitudinal bars 2 are fixedly connected to the inner side surfaces of the hoop plates 4 or the annular reinforcing plates 5; the inner side surface of the hoop plate 4 is provided with a plurality of pegs 41.
The spiral stirrups 3 are bound or welded with the longitudinal bars 2 to form a reinforcement cage of the prefabricated column; the concrete main body 1 is a main body of a prefabricated column; the hoop plate 4 is used for connecting the prefabricated column and other components, such as the prefabricated column upper column 01 and the prefabricated column lower column 02.
In addition, the hoop plate 4 can also be used for being connected with the precast column and the beam, and in order to facilitate the connection of the precast column and the beam, preferably, the hoop plate 4 can be embedded at the connection position where the precast column upper column 01 and the precast column lower column 02 are connected with the beam, and the connection of the precast column and the beam is realized by welding connecting pieces such as brackets on the outer side surface of the hoop plate 4.
The circumferential reinforcing plate 5 can be a steel plate with the similar section size of the concrete main body 1, as shown in figure 1; and a grouting opening can be formed in the center, so that when the gap between the prefabricated upper column 01 and the prefabricated lower column 02 is too large, concrete is poured between the gap and the prefabricated upper column 01 and the prefabricated lower column 02, and the prefabricated upper column 01 and the prefabricated lower column 02 are further connected by utilizing the concrete.
The longitudinal ribs 2 can be connected with the hoop reinforcing plate 5 in a pier head mode, or connected with the hoop reinforcing plate 5 through nuts, or welded with the hoop reinforcing plate 5.
The circumferential reinforcing plate 5 arranged on the end face of the prefabricated column can also be called an end plate, and as shown in fig. 1, the end plate can be flush with the end face of the hoop plate 4; or may be spaced from the end face of the strap 4 as shown in figure 2.
Preferably, referring to fig. 6 and 7, a longitudinal stiffener 6 may be further disposed between two adjacent circumferential reinforcing plates 5, and the specific location of the longitudinal stiffener 6 may be determined according to the structure of the circumferential reinforcing plates 5 and other factors.
On the basis of the embodiment, a lining steel pipe can be arranged between the connecting end surface of the upper prefabricated column 01 and the connecting end surface of the lower prefabricated column 02, and the lining steel pipe is favorable for hoisting and aligning the upper prefabricated column 01 and the lower prefabricated column 02 and is favorable for enhancing the shear strength of the joint of the prefabricated columns.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The fabricated concrete precast column and the construction method thereof provided by the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A construction method of an assembly type concrete precast column is characterized by comprising the following steps:
arranging longitudinal bars (2) and binding or welding spiral stirrups (3) outside the longitudinal bars (2) to form a reinforcement cage;
a hoop plate (4) is sleeved outside the reinforcement cage, and the reinforcement cage is connected with the hoop plate (4);
erecting a formwork and pouring concrete to form the prefabricated column;
hoisting the prefabricated column upper column (01) of the prefabricated column to be right above the prefabricated column lower column (02) of the prefabricated column;
and the hoop plate (4) of the prefabricated column upper column (01) is connected with the hoop plate (4) of the prefabricated column lower column (02) in a welding mode.
2. The fabricated concrete precast column construction method according to claim 1, wherein the coupling of the reinforcement cage and the hoop plate (4) comprises:
connecting the reinforcement cage and the hoop plate (4) through a circumferential reinforcing plate (5);
or the reinforcement cage and the hoop plate (4) are connected by using counter-pulling anchor bars.
3. The fabricated concrete precast column construction method according to claim 2, wherein the inner side surface of the hoop plate (4) is provided with a hole, and both ends of the counter pull anchor are plug-welded or screw-connected with the hole.
4. The fabricated concrete precast column construction method according to any one of claims 1 to 3, wherein the precast column is a centrifugally formed precast column having a cylindrical cavity (11) formed at the center thereof.
5. The fabricated concrete precast column construction method according to claim 4, wherein concrete is cast in the cylindrical cavity (11).
6. The fabricated concrete precast column construction method according to claim 5, wherein a cylinder cavity (11) of the precast column is napped.
7. The prefabricated concrete column is characterized by comprising a prefabricated upper column (01) and a prefabricated lower column (02), wherein the prefabricated upper column (01) and the prefabricated lower column (02) both comprise a concrete main body (1), a longitudinal rib (2) and a spiral stirrup (3) sleeved outside the longitudinal rib (2);
hoop plates (4) are sleeved outside the connecting sections of the upper prefabricated column (01) and the lower prefabricated column (02) in the circumferential direction, hoop plates (4) are provided with circumferential reinforcing plates (5) or split anchor bars at the connecting end surfaces of the upper prefabricated column (01) and the lower prefabricated column (02), and the longitudinal bars (2) are fixedly connected to the inner side surfaces of the hoop plates (4) or the circumferential reinforcing plates (5);
the inner side surface of the hoop plate (4) is provided with a plurality of pegs (41).
8. The fabricated concrete precast column according to claim 7, wherein the circumferential reinforcement plate (5) is provided with longitudinal bar mounting holes for mounting the longitudinal bars (2), and the longitudinal bars (2) are connected with the circumferential reinforcement plate (5) after passing through the longitudinal bar mounting holes.
9. The fabricated concrete precast column according to claim 8, wherein a lining steel pipe is provided between a connection end surface of the precast column upper column (01) and a connection end surface of the precast column lower column (02).
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| CN202110122186.8A CN112922235A (en) | 2021-01-27 | 2021-01-27 | Fabricated concrete prefabricated column and construction method thereof |
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| CN202110122186.8A CN112922235A (en) | 2021-01-27 | 2021-01-27 | Fabricated concrete prefabricated column and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737945A (en) * | 2021-09-17 | 2021-12-03 | 上海大学 | Prefabricated assembled column connection node with hoop steel sleeve plate |
| CN115045440A (en) * | 2022-06-21 | 2022-09-13 | 苏州思萃融合基建技术研究所有限公司 | Prefabricated column component with steel pipe joints at two ends and construction method thereof |
| CN115637778A (en) * | 2022-11-02 | 2023-01-24 | 海南大学 | Assembled variable cross-section reinforced concrete column connected node |
| CN116145895A (en) * | 2021-12-29 | 2023-05-23 | 海南大学 | Prefabricated assembled concrete column |
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