CN219175651U

CN219175651U - Prefabricated assembled concrete hollow column

Info

Publication number: CN219175651U
Application number: CN202223502557.4U
Authority: CN
Inventors: 曾志攀
Original assignee: Fujian Provincial Institute Of Architectural Design And Research Co ltd
Current assignee: Fujian Provincial Institute Of Architectural Design And Research Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-06-13
Anticipated expiration: 2032-12-27

Abstract

The utility model relates to a prefabricated assembled concrete hollow column, which comprises a reinforcement cage and a concrete prefabricated area formed on the periphery of the reinforcement cage by adopting a centrifugal method; the reinforcement cage comprises a plurality of main reinforcements positioned in the concrete prefabrication area and extending along the axial direction of the hollow column, and stirrups connected between the main reinforcements; the interior of the concrete prefabricated area forms a hollow cast-in-place area, and the stirrups extend into the hollow cast-in-place area. The utility model aims to provide a prefabricated concrete hollow column which is light in weight and excellent in integrity and earthquake resistance. The utility model has the advantages that: the hollow cast-in-place area is arranged in the hollow cast-in-place structure, so that the volume and the weight of precast concrete can be reduced, the construction period can be saved, the construction cost can be reduced, the prefabricated assembled concrete hollow column is light, the transportation and the hoisting are convenient, and the hoisting cost and the equipment leasing cost can be saved.

Description

Prefabricated assembled concrete hollow column

Technical Field

The utility model relates to the technical field of prefabricated building, in particular to a prefabricated concrete hollow column.

Background

In recent years, electronic commerce, transportation and modern logistics industry are vigorously developed, investment and blowout of the territory appear in logistics storage, construction of a modern large logistics garden and warehouse is promoted in all places, meanwhile, along with high-speed development of building industrialization, investment time cost and quick return requirements are met, the construction period of a traditional cast-in-situ reinforced concrete structure is long, the capital requirements are not met, and the modern large logistics warehouse adopting a prefabricated assembly construction mode is more and more favored in high-quality quick construction.

Taking the logistics center shown in fig. 9 as an example, the total building area of the logistics center is about 60 ten thousand square meters, wherein the warehouse consists of a plurality of 4-layer warehouses, and the monomer warehouse: the layer height is 10.8 meters, the length is 180 meters, the width is 80 meters, the standard column spacing is 12 meters, the load of the floor surface of the 2-4 layers is 3.5 tons, loading platform lanes are arranged on one long side of all the warehouses, and large cranes can be arranged on the ground of only one side and two ends of the short side or one end during construction.

The structural design effort shows that the general dimensions of the structural members are as follows: the column of the first layer is 1200x1200mm, C50, the column of the second layer is 1100x1100mm, C45, more than three layers are 1000x1000mm, C40, the main beam size of the beam C30 frame is 600x14000mm, the secondary beams are 400x1000mm, the secondary beam spacing is 3000mm, and the thickness of the floor slab is 180mm.

The beam columns are arranged according to a standard of 12 m square, the layer height is 10.8 m, the traditional cast-in-situ reinforced concrete mode is adopted for construction, the number of templates and scaffolds is large, the erection period is long, and the cost is high. The beam column plate component has high standardization degree due to regular structural plane, if the prefabricated assembly type construction mode is adopted, the beam column plate component has almost the same size, the turnover number of the mould is high, the component is very suitable for factory manufacture, the on-site assembly adopts mechanical hoisting construction, the component precision is high, the construction period of a large number of template supports and the corresponding cost are saved, the construction mode of improving the work efficiency and the engineering quality and saving the construction cost and the construction period is identical with the national development direction of the building industry.

The on-site automobile crane or the crawler crane is arranged in a mode that only one side or one end part of a building is provided, the arm length of the farthest component crane exceeds 80 meters, the first layer crane can enter the site, the second layer crane can only measure the weight of prefabricated components on the outer side of the building by taking two layers as an example, the column height is 10.8 meters and 1.1x1.1 meters, the buckling beam height is 1.4 meters, the weight of one prefabricated column is 28.5 tons, the main beam length is 0.6x1.4 meters, the buckling plate thickness is 0.18 meters, the weight is 0.6x (1.4-0.18) x (12-1.1) x 25=19.95 tons, the secondary beam length is 12 meters and 0.4x (1.0-0.18) x (12-0.6) x 25=9.35 tons. The found domestic large-scale hoisting equipment can hoist more than two layers of columns and frame main beams by the weight of the existing components, and the beams and columns have no method.

Disclosure of Invention

The utility model aims to provide a prefabricated concrete hollow column which is light in weight and excellent in integrity and earthquake resistance.

The aim of the utility model is realized by the following technical scheme:

a prefabricated assembled concrete hollow column comprises a reinforcement cage and a concrete prefabricated area formed on the periphery of the reinforcement cage by adopting a centrifugal method; the reinforcement cage comprises a plurality of main reinforcements positioned in the concrete prefabrication area and extending along the axial direction of the hollow column, and stirrups connected between the main reinforcements; the interior of the concrete prefabricated area forms a hollow cast-in-place area, and the stirrups extend into the hollow cast-in-place area.

Compared with the prior art, the utility model has the advantages that:

the hollow cast-in-place area is arranged in the hollow cast-in-place structure, so that the volume and the volume of precast concrete can be reduced, the weight of precast components can be reduced, the construction period can be saved, the construction cost can be reduced, the prefabricated assembled concrete hollow column is light, the transportation and the hoisting are convenient, and the hoisting cost and the equipment leasing cost can be saved; in addition, the stirrups of the reinforcement cage extend into the hollow cast-in-place area, when the core concrete is post-poured in the hollow part of the site, the stirrups strengthen the bonding of the cross section of the precast concrete and the post-poured concrete in the site, so that the precast concrete and the post-poured concrete work together better, and a superposed stressed member with excellent integrity and anti-seismic performance is formed.

The manufacturing of the prefabricated concrete hollow column adopts a rotary equipment centrifugation method, the existing production equipment and process of the prestressed centrifugal concrete hollow square pile (round tubular pile, hollow column production) can be utilized, new production equipment is not required to be developed, only the anchor plate at the end of the main reinforcement of the reinforcement cage is required to be modified, the hollow column is formed by only an outer steel mould, an inner mould plate is not arranged, the complicated technological process of removing the inner mould and the inner mould is saved, the production difficulty of the hollow column is reduced, the volume of precast concrete is reduced, the weight of precast components is reduced, the construction period is shortened, and the manufacturing cost is reduced.

Drawings

Fig. 1 is a schematic view of the construction of an embodiment of a prefabricated concrete hollow column according to the present utility model.

Fig. 2 is a schematic structural view of the reinforcement cage.

Fig. 3 is a schematic view of the structure of the port closure plate.

Fig. 4 is a schematic structural view of the fixing plate.

Fig. 5 is an elevational side view of the reinforcement cage.

Fig. 6 is a schematic illustration of the connection of the reinforcement cage to the port closure plate.

Fig. 7 is a schematic view of the mounting state of the fixing plate.

Fig. 8 is a schematic perspective view of a prefabricated concrete hollow column.

FIG. 9 is an exemplary logistics center general floor plan.

Description of the reference numerals: 1 reinforcement cage, 1-1 main reinforcement, 1-2 stirrups, 1-3 pouring joints, 2 concrete prefabrication areas, 2-1 cast-in-situ areas, 3 port sealing plates, 3-1 fixing holes and 4 fixing plates.

Detailed Description

The present utility model is described in detail below with reference to the drawings and examples of the specification:

fig. 1 to 8 show a prefabricated concrete hollow column according to an embodiment of the present utility model.

A prefabricated assembled concrete hollow column comprises a reinforcement cage 1 and a concrete prefabricated area 2 formed on the periphery of the reinforcement cage 1 by adopting a centrifugal method;

the reinforcement cage 1 comprises a plurality of main reinforcements 1-1 which are positioned in the concrete prefabrication area 2 and extend along the axial direction of the hollow column, and stirrups 1-2 connected between the main reinforcements 1-1;

the hollow cast-in-situ area 2-1 is formed in the concrete prefabricated area 2, and the stirrups 1-2 extend into the hollow cast-in-situ area 2-1.

The prefabricated concrete hollow column is manufactured by adopting a centrifugal method, so that the prefabricated hollow column has the same positive section strength and inclined section strength as the integral cast-in-situ reinforced concrete column, the hollow part of the column is not hollow, but is filled with stirrups in a reinforcement cage prefabricated according to the design, and the stirrups are uniformly distributed along the section and the longitudinal direction, thereby solving the problem that the interface of the prefabricated concrete and the post-cast core concrete of the traditional hollow column is a weak link for the two to work together.

And the two ends of the main reinforcing steel bar 1-1 extending out of the concrete prefabrication area 2 form pouring joints 1-3.

The pouring joint 1-3 is used for butt joint connection of two adjacent concrete hollow columns, the prefabricated length of the columns is the layer height minus the height of the control beam, and the part reserved for beam column joints is used for pouring concrete during assembly construction of the beam column joints on site.

The stirrups 1-2 between the main reinforcing steel bars 1-1 are diamond-shaped, groined-shaped or round.

The outer contour of the precast concrete zone 2 is circular or square.

According to the engineering background shown in fig. 9, the hollow diameter of 1100x1100mm of the concrete hollow column is 1000mm, the weight of a prefabricated finished product is 9.978 tons, the original 28.5 tons is reduced to 10 tons, and the requirement of on-site hoisting is met.

The manufacturing method of the prefabricated concrete hollow column comprises the following steps:

s1, manufacturing a reinforcement cage 1 according to the shape of a hollow column; the reinforcement cage 1 comprises a plurality of main reinforcements 1-1 extending along the axial direction of the hollow column and stirrups 1-2 connected between the main reinforcements 1-1;

the main reinforcements 1-1 of the reinforcement cage 1 are distributed at intervals along the peripheral outline of the concrete hollow column, the stirrups 1-2 are used for connecting the main reinforcements 1-1, and the stirrups 1-2 are arranged in a staggered manner in the middle area of the reinforcement cage 1.

The stirrups 1-2 can be connected in a diamond, groined or round mode in the manufacturing process of the reinforcement cage 1.

The main steel bars 1-1 extend out of two ends of the steel bar cage 1, the extension sections of the main steel bars are used for fixing the port sealing plates 3 in the centrifugal process, and the extension sections can be used as pouring joints 1-3 for butt joint connection of two adjacent concrete hollow columns in the later period.

S2, installing the reinforcement cage 1 on concrete centrifugal pipe making equipment, installing port sealing plates 3 at two ends of a prefabricated column section, controlling the concrete feeding amount in the reinforcement cage 1, and performing centrifugal molding of concrete through the concrete centrifugal pipe making equipment;

the reinforcement cage 1 is arranged in an inner cavity of an outer template of the concrete centrifugal pipe making equipment, and two ends of the outer template are provided with port sealing plates 3.

The port sealing plate 3 is provided with a fixing hole 3-1 for inserting the main reinforcing steel bar 1-1.

The concrete feeding amount in the reinforcement cage 1 is calculated according to the specification of the hollow column.

S3, forming a concrete prefabrication area 2 integrated with the reinforcement cage 1 after the concrete is centrifugally formed, wherein a hollow cast-in-situ area 2-1 is arranged in the concrete prefabrication area 2, and stirrups 1-2 extend into the hollow cast-in-situ area 2-1; when core concrete is poured in the cast-in-situ area 2-1, the stirrups strengthen the adhesion between the prefabrication and the on-site post-pouring concrete section, so that the prefabrication and the on-site post-pouring concrete section work together better, and a superposed stressed member with excellent integrity and anti-seismic performance is formed.

And (3) performing (steam) curing on the formed concrete prefabricated area 2 and the outer-layer templates, and removing the outer-layer templates and the port sealing plates 3 on the two sides after curing.

Before packaging and transporting, the prefabricated assembled concrete hollow column is firstly provided with a fixing plate 4, and the fixing plate 4 is the same as the port sealing plate 3 and is drilled according to the position and the size of the main reinforcing steel bar 1-1.

The fixing plate is a rectangular steel plate with the thickness of 6mm, the cross section size of the fixing plate is the same as that of the hollow column, the middle of the fixing plate is provided with a hole, and the width of the plate is 80mm;

during hoisting, the fixing plate 4 is sleeved on the top end of the main steel bar 1-1 (the pouring joint 1-3) at the upper end of the prefabricated concrete hollow column, the main steel bar 1-1 at the upper end stretches out to be higher than the steel bar at the frame beam, the free end of the main steel bar is longer, 4 locating points are fixed by sleeving the fixing plate in a plate binding or rubber sleeve, and the position of the steel bar in the transportation hoisting process is ensured to be unchanged and is accurate when the steel bar is butted with the steel bar at the lower end of the upper section column.

Claims

1. The utility model provides a prefabricated assembled concrete hollow column which characterized in that: the concrete prefabricated area (2) is formed on the periphery of the reinforcement cage (1) by adopting a centrifugal method;

the reinforcement cage (1) comprises a plurality of main reinforcements (1-1) which are positioned in the concrete prefabrication area (2) and extend along the axial direction of the hollow column, and stirrups (1-2) connected between the main reinforcements (1-1);

the interior of the concrete prefabricated area (2) forms a hollow cast-in-situ area (2-1), and the stirrups (1-2) extend into the hollow cast-in-situ area (2-1).

2. The prefabricated concrete hollow column according to claim 1, wherein: and the two ends of the main reinforcing steel bars (1-1) extending out of the concrete prefabrication area (2) form pouring joints (1-3).

3. The prefabricated concrete hollow column according to claim 1, wherein: the stirrups (1-2) between the main steel bars (1-1) are diamond-shaped, groined-shaped or round.

4. The prefabricated concrete hollow column according to claim 1, wherein: the outer contour of the concrete prefabricated area (2) is round or square.