KR20150124733A - Circular prefabricated structure for column, Top down method and Construction method of frame using the same - Google Patents

Abstract

The present invention relates to a circular prefabricated column structure, a top down method using the same, and a method for constructing frame to form a steel framed reinforced concrete column when constructing a building. The circular prefabricated column structure of the present invention to form the circular steel framed reinforced concrete column includes multiple shape steel materials formed inside to be spaced from the outer surface of the column at a predetermined interval; multiple connectors connecting the shape steel materials each other; spacers joined to the outer side of the shape steel materials; and a pair of semicircular molds joined to the outer side of the spaces and forming the surface of the column and divided into a semicircular shape.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular prefabricated column structure,

The present invention relates to a circular pre-assembled column structure for forming a circular steel reinforced concrete column at the time of constructing a structure, a back-boring method using the same, and a method of constructing a frame, more particularly, The present invention relates to a circular prefabricated column structure which is easy to manufacture and supply materials and members, and a backfire method and a frame construction method using the same.

Underground pillar walls are used as a structure to gradually construct underground structures and at the same time to build up ground structures. In the underground pillar construction method, the method of laying concrete after inserting formwork and the pillar members of pre- There is a way to get in.

However, since the column members made of prefabricated PCs are heavy in weight, they are burdened with heavy loads and transportation.

In the case of the above-mentioned field installation method, if only reinforcing net is inserted in the perforation hole and it is constructed with concrete pile in place, it can not be used as a column after excavation of the ground. Beam joining is also impossible. In order to use the column installed in the ground as an underground column, Do.

Conventionally, as can be seen from FIG. 1 (a), a rectangular pipe, a steel pipe for a concrete filled steel tube (CFT column), and a steel pipe, which is a closed steel pipe produced by bending cold- (ACT column) or the like was inserted into the perforation hole (H), and the pillar member was installed in such a manner that concrete was poured into the formwork or steel pipe.

However, rectangular shaped formwork may cause usability problems due to side pressure due to lateral pressure when concrete is laid. CFT columns are difficult to supply steel pipes with the required thickness, thickness and material at the required time.

In addition, the Act column is likely to cause call-up when concrete is poured, and installation cost is excessive due to the installation of an external diaphragm in the panel zone. As the coil is formed and welded at four places, There is a problem that there is no alternative to welding at the time of up-down welding.

In addition, as shown in FIG. 1 (a), in order to construct a rectangular column in the perforation hole H, the perforation hole must be drastically larger than the cross-sectional size of the column, which is uneconomical in cost and time. For example, if the size of one side of the column is 600 mm, the diameter of the perforation hole should be 900 mm.

Therefore, although it is possible to consider a method of constructing a permanent mold in a circular shape in the perforation hole, it is very difficult to form a circular permanent mold in the past.

As shown in Fig. 1 (b), a centrifugal reinforced concrete column (CRC column) made of centrifugal force concrete and a reinforcing net was developed. However, in the case of CRC columns, there is no product manufacturing facility with a thickness exceeding 600 mm, so the production cost is high, and products having a diameter exceeding 600 mm have a large unit weight, which makes transportation and construction difficult.

On the other hand, in the backfilling method, a separate procedure was required, such as installing a shear connection material on the concrete attachment surface in order to integrate with surrounding concrete.

In order to solve the above-mentioned problems, the present invention provides a circular pre-assembly column structure capable of minimizing the diameter of the perforation hole and preventing the call-up of the column surface, and a method of retrofitting and a method of constructing a frame using the same.

The present invention provides a circular prefabricated column structure that does not require a separate shear connection member on the concrete mounting surface for integration with surrounding concrete in a backfilling method, and a reverse backgrinding method and a frame construction method using the same.

The present invention provides a circular pre-assembled column structure which is easy to supply and supply materials, and which is simple to manufacture and combine, and to provide a back-forging method and a frame construction method using the same.

The present invention provides a circular prefabricated column structure having a lightweight column structure prefabricated to reduce the burden of transportation and weight as well as a permanent form, and a method of backfiring and a method of constructing a frame using the same.

According to an aspect of the present invention, there is provided a circular pre-assembled column structure for forming a circular steel reinforced concrete column, comprising: a plurality of shaped steel plates provided on an inner side of a column, ; A plurality of connecting members interconnecting the shaped steel members; A spacer coupled to the outside of the shaped steel; And a pair of semicircular molds coupled to the outside of the spacer to form an outer surface of the column and divided into semicircles; The present invention provides a circular pre-assembled column structure.

According to another preferred embodiment of the present invention, the section steel material is a-shaped steel and is arranged such that the corners of the a-shaped steel are directed to the outside of the column, one end of which is welded to the outer edge of the a- The present invention provides a circular pre-assembly column structure,

According to another preferred embodiment of the present invention, there is provided a circular pre-assembly column structure, wherein an inwardly bent reinforcing portion is formed at a bent outer end of the spacer.

According to another preferred embodiment of the present invention, the semicircular mold is formed by bending a metal plate so as to alternately form a crest and a floor, wherein the longitudinal direction of the crest and the floor is arranged in the circumferential direction of the column. Structure.

According to another preferred embodiment of the present invention, the opposite end portions of the semicircular molds are welded to the outer surface of the spacer, and the blocking members are detachably coupled to each other with a predetermined distance between adjacent semicircular moldings. Lt; / RTI >

According to another preferred embodiment of the present invention, there is provided a circular pre-assembled column structure characterized in that the block material is a synthetic resin material.

According to another preferred embodiment of the present invention, there is provided a circular pre-assembly column structure, wherein a steel pipe is coupled between the upper and lower semicircular molds and a stud is coupled to the inside of the steel pipe.

According to another aspect of the present invention, there is provided a method of manufacturing a column structure, comprising the steps of: (a) drilling a plurality of column positions and fitting a circular pre-assembly column structure; (b) placing the concrete in the circular pre-assembly column structure; (c) firstly disposing a lower portion of a position where the slab is to be installed; (d) coupling brackets to both sides of the circular pre-assembly column structure; (e) coupling a rail beam to the ends of the bracket to both sides of the circular pre-assembly column structure; (f) installing a connecting beam between adjacent rail beams; (g) installing a deck plate in a remaining span excluding a span where the circular pre-assembly column structure is located; (h) placing reinforcing bars on the deck plate and casting slab concrete; (i) firstly making a second tidal wave to the bottom of the tidal wave surface and laying the foundation; (j) disposing a columnar reinforcement outside the circular pre-assembly column structure; (k) installing a mold outside the pillar reinforcement; And (l) placing the concrete in the mold to form the column, placing an upper reinforcing bar in a span where the circular pre-assembly column structure is located, and installing a drop panel by pouring concrete; The present invention provides a sewing method using a circular pre-assembly column structure.

According to another preferred embodiment of the present invention, in the step (d), the reinforcing member is coupled to one end of the bracket and the other end is coupled to the side surface of the circular pre-assembly column structure. To provide a backfill method using

According to a preferred embodiment of the present invention, there is also provided a method of manufacturing a semiconductor device, comprising the steps of: (a) installing a circular pre-assembly column structure on a ground; (b) coupling brackets to both sides of the circular pre-assembly column structure; (c) coupling a rail beam to the ends of the bracket to both sides of the circular pre-assembly column structure; (d) installing a connecting beam between adjacent rail beams; (e) installing a deck plate in the remaining span excluding the span where the circular pre-assembly column structure is located; And (f) placing reinforcing bars on top of the deck plate and casting slab concrete; The present invention provides a method of constructing a frame structure using a circular pre-assembly column structure.

The effects of the present invention are as follows.

First, by using a prefabricated column structure with a pair of semicircular molds coupled to the outside, it is possible to maximize the perforation efficiency by minimizing the diameter of the perforated holes, and prevent the column face from being folded.

Secondly, since the easily obtainable steel material and the deck plate are used, it is easy to supply and supply materials and to reduce the production cost.

Third, the semicircular formwork can be easily coupled to the spacer with direct-coupling screws, and the upper and lower steel materials can be bolted together, which minimizes field welding work. Therefore, the safety and the workability are excellent.

Fourth, when a deck plate is used as a semicircular formwork, the floor and the floor are repeatedly formed on the outer surface of the column. Therefore, since the bending stiffness of the member is increased, the shape of the circular shape can be maintained during transportation and assembly, and there is no deformation due to the side pressure when the concrete is laid. In addition, it is not necessary to install a separate shear connection material on the concrete attachment surface in order to integrate with surrounding concrete.

Fifth, since only the column structure needs to be pre-assembled, the weight during transportation and assembly can be minimized.

Sixth, since the semicircular formwork outside the column structure forms a permanent formwork, no separate refractory coating is required.

Seventh, when adjusting the eccentricity of the center column, only the bracket connected to the side of the circular pre-assembly column structure can be cut according to the actual size and position of the column, so that the error can be corrected easily without affecting other members.

Eighth, the drop panel enlarges the rigid zone of the column to form a flat slab structure as a whole, and the span length of the slab between the adjacent rail beams is reduced, thereby saving the floor space and reducing the construction cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a column member to be installed in a conventional perforation hole; FIG.
2 is a perspective view showing an embodiment of a circular pre-assembly column structure according to the present invention.
3 is an exploded perspective view of a part of the circular pre-assembly column structure of the present invention.
4 is an exploded perspective view of the circular pre-assembly column structure of the present invention.
5 is an enlarged perspective view of a part of the circular pre-assembly column structure of the present invention.
6 is a sectional view of a circular pre-assembly column structure of the present invention.
7 and 8 are enlarged cross-sectional views, respectively, of a portion of the circular pre-assembly column structure of the present invention.
9 is a perspective view showing another embodiment of the circular pre-assembly column structure of the present invention.
10 is a perspective view showing a panel zone of the circular pre-assembly column structure of the present invention.
11 is a sectional view showing a panel zone of a circular pre-assembly column structure according to the present invention.
FIGS. 12 to 15 are perspective views showing steps of the back-filling method using the circular pre-assembled column structure of the present invention. FIG.
16 is a cross-sectional view of a column constructed by a backfill method using a circular prefabricated column structure of the present invention.
17 is a perspective view showing a part of a structure constructed by a backfilling method using a circular prefabricated column structure of the present invention.
Fig. 18 is a front view of a column constructed by a backfill method using a circular prefabricated column structure of the present invention. Fig.
19 is a sectional view showing a circular pre-assembly column structure of the present invention reinforced with a vertical member.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

FIG. 2 is a perspective view showing an embodiment of a circular pre-assembly column structure according to the present invention, FIG. 3 is an exploded perspective view of a part of the circular pre-assembly column structure according to the present invention, and FIG. 4 is an exploded perspective view of the circular pre-assembly column structure according to the present invention.

The present invention relates to a circular pre-assembly column structure (1) for forming a round steel reinforced concrete column.

The present invention can be applied not only to a backfilling method of constructing an underground structure while gradually constructing a ground structure by using a underground earth retaining wall as a structure, but also to a sequential method of sequentially constructing a base structure from a basement layer to a ground layer after ground excavation.

As shown in FIGS. 2 to 4, the circular pre-assembled column structure of the present invention includes a plurality of shaped steel members 11 provided on the inner side so as to be spaced apart from each other at an outer side of the column; A plurality of connecting members (12) interconnecting the shaped steel members (11); A spacer 13 coupled to the outside of the shaped steel member 11; And a pair of semicircular molds (14) joined to the outside of the spacer (13) to form an outer surface of the column and divided into semicircles; .

The shaped steel material 11 is provided on the inner side so as to be spaced apart from the outer surface of the column by a predetermined distance.

In the embodiment shown in Figs. 2 to 4, the shaped steel member 11 is arranged at four positions with the a-shaped cross section, but a c-shaped cross section member and the like are also applicable.

A through hole for bolt connection with the connecting member 12 may be formed in the shaped steel member 11.

The connecting member 12 interconnects the adjacent shaped steel members 11.

The connecting member 12 may be a flat steel, a section steel, a section steel or the like and may be bolted or welded to the connecting member 12 to join adjacent steel members 11 together to form a single member.

In the embodiment of Figs. 2 to 4, the connecting member 12 of the A-shaped steel is bolted to the steel member 11.

The connecting member 12 may be coupled to the inner or outer side of the adjacent steel member 11 at both ends thereof. However, when the inner member is coupled to the inner side of the steel member 11, There is no.

The spacer 13 is coupled to the outside of the steel sheet 11 in such a constitution that the semicircular mold 14 and the shaped steel sheet 11 secure the coating thickness between the semicircular molds 14 and 11.

The spacer 13 is welded to the outer edge of the A-shaped steel and the other end is welded to the semicircular die 14, It can be bent so as to touch the inner surface.

The semicircular mold 14 is coupled to the outside of the spacer 13 to form an outer surface of the column, and is configured to have a pair of semicircular segments to have a circular cross section as a whole.

The semicircular formwork 14 is divided into a predetermined length in the vertical direction and the semicircular formwork 14 adjacent to the upper and lower sides is adhered with a waterproof tape outside the joint to prevent the concrete from flowing out.

The circular pre-assembled column structure of the present invention has a circular shape like the shape of the perforated hole by placing a pair of semicircular molds 14 on the outer surface of the column. Therefore, it is not necessary to drill the ground excessively as in the case of a quadrangular pole as shown in FIG. 1 (a), so that the drilling efficiency can be maximized. In addition, the semicircular formwork 14 may remain as a permanent form even after concrete curing has been placed therein, and bear the load during construction.

The circular pre-assembled column structure of the present invention can be manufactured in the factory and moved to the site, and the load is supported by the composite action of the steel member and the concrete by placing the concrete inside.

FIG. 5 is an enlarged perspective view showing a part of the circular pre-assembly column structure of FIG. 2; FIG.

The semicircular formwork 14 is formed by bending a metal plate such that the valleys 141 and the valleys 142 are formed alternately and the valleys 141 and the floor 142 Can be arranged in the circumferential direction of the column.

That is, the semicircular formwork 14 may be formed of a lightweight deck plate in which the valleys 141 and the floor 142 are alternately formed.

According to the present invention, the valleys 141 of the semicircular molds 14 and the floor 142 are arranged in the circumferential direction of the column, which is advantageous for fixing the fixing space and bonding the spacers 13. Also, since the bending stiffness of the member is increased, the circular shape can be maintained as it is during transportation and assembly, and the casting phenomenon can be prevented because there is no deformation due to the side pressure when the concrete is poured.

Meanwhile, the valleys 141 and the floor 142 of the semicircular formwork 14 form a protruding portion therein to perform a rigid shearing-synthesizing operation with concrete. Therefore, since the shear force of the concrete is transmitted to the steel material, it is not necessary to join the shear joint material separately for the integration with the surrounding concrete in the backfilling method.

FIG. 6 is a sectional view of the circular pre-assembled column structure of the present invention, and FIGS. 7 and 8 are enlarged sectional views of a part of the circular pre-assembled column structure of the present invention.

As shown in FIGS. 6 to 8, a reinforced portion 131 bent inward may be formed at the bent outer end of the spacer 13.

That is, the spacer 13 can be formed in a shape bent into seven characters.

When the semicircular mold 14 and the spacer 13 are engaged, the nail can be compressed by a nail gun. At this time, the spacer 13 can be deformed by the external force of the tablet machine. The reinforcing portion 131 increases the bending stiffness of the spacer 13 and prevents deformation of the spacer 13 due to such external force.

6 and 8, the opposite end portions of the respective semicircular molds 14 are welded to the outer surface of the spacer 13 and spaced apart from each other by a distance between adjacent semicircular moldings 14, Is detachably engageable.

6 and 7, the spacer 13 coupled to the center portion of the semicircular mold 14 may be easily formed into a semicircular mold 14 by using a nail or a self drilling screw And the spacer 13, which is coupled to the end of the semicircular mold 14 as in Figures 6 and 8, can be welded to the semicircular mold 14.

At this time, the troughs 141 of the semicircular molds 14 are tightly coupled to the spacers 13, but the concrete can be drained to the side openings of the troughs 142. Therefore, it is possible to prevent the flowing concrete from flowing out by engaging the stopper (15).

The stopper 15 is preferably made of an elastic synthetic resin material so as to be able to seal the space between the semicircular molds 14 adjacent thereto.

The clogging material 15 can be removed after the concrete is cured, and the space where the clogging material 15 is present can be utilized as a space for arranging electric wires or pipes.

10 is a perspective view showing a panel zone of the circular pre-assembled column structure according to the present invention, and FIG. 11 is a perspective view showing the panel pre-assembled column structure of the circular pre- Sectional view showing a panel zone.

9 to 11, a steel pipe 16 is coupled between the upper and lower semicircular molds 14 in the panel zone where the beam 2 is coupled to the side surface, and the stud 17 ) Can be combined.

The steel pipe 16 is for transmitting the moment of the beam 2, and a steel pipe 16 having a high rigidity is provided in the panel zone.

The steel pipe 16 is joined to the outside of the valley of the upper and lower semicircular molds 14 and the spacer 13 is welded into the steel pipe 16. At this time, it is preferable to attach a waterproof tape to the joint between the steel pipe 16 and the semicircular mold 14 to prevent leakage of the concrete paste.

The stud 17 serves as a shear connection member for integrating the concrete with the steel pipe 16. Since the steel pipe 16 has to resist mainly the momentum, more studs 17 are attached to the upper portion of the beam 2, .

FIGS. 12 to 15 are perspective views illustrating steps of a backfilling method using the circular prefabricated column structure of the present invention. And FIG. 16 is a cross-sectional view of a column constructed by a back-up method using the circular pre-assembled column structure of the present invention, and FIG. 17 is a perspective view showing a part of a structure constructed by a back-up method using the circular pre- assembled column structure of the present invention.

The backfilling method using the circular prefabricated column structure of the present invention will be described with reference to FIGS. 12 to 15. FIG.

(A) A plurality of column positions are drilled in the ground, and the circular pre-assembled column structure 1 described above is inserted into a perforation hole (FIG. 12 (a)).

The circular pre-assembled column structure 1 has a circular cross section like the shape of the perforated hole, and the size of the perforated hole can be reduced to improve the perforation efficiency. When a golf deck plate in which the valley 141 and the floor 142 are alternately formed by the semicircular formwork 14 of the circular pre-assembled column structure 1 is used, a separate shear connection material is unnecessary and the bending stiffness of the member can be increased As described above.

The steel pipe 16 is positioned between the upper and lower semicircular molds 14 in the panel zone where the beam 2 is joined in the circular pre-assembly column structure 1 so that the moment of the beam is transmitted well.

12 (b)), (c) the lower portion of the position where the slab 3 is to be installed is firstly disposed (Fig. 12 (b)), (C) of FIG.

(D) The bracket 21 is coupled to both sides of the circular pre-assembled column structure 1 (Fig. 13 (a)). (E) The bracket 21 is fixed to both sides of the circular pre- And a connecting beam 23 is provided between the adjacent rail beams 22 (FIG. 13 (c)). The rail beams 22 are connected to the ends of the rail beams 22 (FIG.

In step (d), the bracket 21 is coupled to both sides of the circular pre-assembly column structure 1 to which the beam 2 is to be coupled. The bracket 21 temporarily supports the rail beam 22 in the form of a cantilever until the drop panel 5 to be described later is completed and the rail beam 22 is provided with the connecting beam 23.

The drop panel 5 is installed after the span where the circular pre-assembly column structure 1 surrounded by the facing rail beam 22 and the connection beam 23 is located. In order to optimize the bending moment distribution within the span of the slab, the span between the adjacent rail beams 22 and the rail beam 22 is set to be a slab span. 22 to hinge-connect the connecting beam 23 to form a gel-joint.

Further, (g) a deck plate 31 is installed in the remaining span excluding the span where the circular pre-assembly column structure 1 is located (FIG. 14 (a)), (h) The reinforcing bars are laid and the slab concrete 32 is laid (Fig. 14 (b)). (I) Firstly, a second trough is made to the lower part of the trough foundation surface, and the foundation 33 is laid c)).

The floor 1 slab is completed by the steps (g) and (h), and the foundation 33 is laid through the step (i). Of course, the steps (d) and (h) may be repeated before the foundation 33 is laid, and the other lower-layer construction may be sequentially performed.

The span in which the deck plate is not installed in the step (g), that is, the span where the circular pre-assembly column structure 1 is located, can be used as a ventilating hole, a material entry / exit port, etc.

15 (a)); (k) a mold 42 is installed outside the pillar reinforcement 41; (c) a pillar 42 is installed outside the pillar reinforcement 41; 15 (b)). (1) Concrete is placed in the mold 42 to form the column 4, and the upper reinforcing bars (not shown) are formed in the span where the circular pre- 51 are laid out and the concrete is laid to install the drop panel 5 (Fig. 15 (c)).

The pillar 4 is formed on the outside of the circular pre-assembly column structure 1 on the base 33 through the steps (j) to (l).

17, the drop panel 5 enlarges the rigid zone of the column 4 by increasing the peripheral thickness of the column 4 with the concrete being poured thicker than the slab thickness, Thereby forming a flat slab structure.

Therefore, the overall slab thickness can be made thin, which is economical.

And the rail beam 22 divides the area of the slab 3 and the area of the drop panel 5. Therefore, the span length of the slab 3 between the rail beam 22 and the rail beam 22 of the adjacent main column 4 becomes a span length, and the net span of the composite beam can be reduced.

In step (l), the reinforcing bars of the drop panel 5 need to be laid only on the upper reinforcing bars 51, as in the case of the drop panel 5 of a conventional flat slab.

Meanwhile, when the column serving as the center column is eccentrically installed outside the position in the design drawing, that is, when the center column having the four side surfaces joined to the four sides is eccentrically installed as shown in FIG. 16, It is difficult to adjust the eccentricity.

However, in the present invention, since the bracket 21 is cantilevered on both sides of the circular pre-assembly column structure 1 and the rail beam 22 is provided on the outside of the bracket 21, It is possible to adjust the eccentricity of the column only by adjusting the length of the connecting portion 21 and the shape of these joint portions. Therefore, the bracket 21 can be cut with a laser so as to fit the outer surface of the circular pre-assembly column structure 1 in accordance with the actual size and position of the column, and the joints can be adjusted, so that the eccentricity can be adjusted without affecting other members.

FIG. 18 is a front view of a column constructed by a backfilling method using the circular prefabricated column structure of the present invention. FIG.

18, in the step (d), the stiffener 24, which is coupled to the end of the bracket 21 at one end and the side of the circular pre-assembly column structure 1 at the other end, have.

Since the bracket 21 is formed to have the same thickness as the drop panel 5, the bracket 21 can not be excessively thick to support the load. Therefore, when the cross section of the bracket 21 is insufficient, the reinforcing member 24 temporarily reinforces it.

18 (a), the reinforcing member 24 is connected to the side surface of the circular pre-assembled column structure 1 on the upper portion of the bracket 21 and is tensile reinforced. Alternatively, as shown in FIG. 18 (b) And can be compressed and reinforced by being connected to the side surface of the lower circular pre-assembled column structure 1.

The present invention is also applicable to construction of a ground structure in addition to the above-described back-up method.

The method of constructing a frame using such a circular pre-assembly column structure includes the steps of: (a) installing the circular pre-assembly column structure 1 on a ground; (b) attaching brackets (21) to both sides of the circular pre-assembly column structure (1); (c) coupling the rail beam 22 to the ends of the bracket 21 to both sides of the circular pre-assembly column structure 1; (d) installing a connecting beam (23) between adjacent rail beams (22); (e) installing a deck plate (31) in a remaining span excluding a span where the circular pre-assembly column structure (1) is located; (F) placing reinforcing bars on the deck plate (31) and casting the slab concrete (32); And a control unit.

In the frame construction method using the circular pre-assembly column structure, the circular pre-assembly column structure 1 is installed in the ground in step (a).

Steps (b) to (f) are the same as steps (d) to (h) of the backfilling method using the circular pre-assembled column structure described above.

19 is a sectional view showing a circular pre-assembly column structure of the present invention reinforced with a vertical member.

When there is a space between the outer surface of the connecting member 12 and the semicircular formwork 14 and the proof strength is insufficient due to the presence of only the steel sheet 11 as shown in Figures 19 (a) to 19 (c) It is possible to additionally arrange a plurality of reinforcing bars or a steel material.

1: circular pre-assembly column structure 11: shaped steel
12: connecting member 13: spacer
131: reinforcement part 14: semicircular formwork
141: Goal 142: Maru
15: Stopper 16: Steel pipe
17: Stud 2: Beam
21: Bracket 22: Rail beam
23: connecting beam 24: stiffener
3: Slab 31: Deck plate
32 Slab Concrete 33 Foundation
4: This column 41:
42: Form 5: Drop Panel
51: Upper reinforcing bar H: Perforation hole

Claims (10)

A circular pre-assembly column structure (1) for forming a circular steel reinforced concrete column,
A plurality of shaped steel members (11) provided on the inner side so as to be spaced apart from each other at an outer side of the column;
A plurality of connecting members (12) interconnecting the shaped steel members (11);
A spacer 13 coupled to the outside of the shaped steel member 11; And
A pair of semicircular molds 14 joined to the outside of the spacer 13 to form an outer surface of the column and divided into semicircles; And a second pre-assembly column structure.
The method of claim 1,
The shape steel (11) is arranged such that the corners of the steel are directed to the outside of the column, and one end of the spacer (13) is welded to the outer edge of the steel and the other end is welded to the inner surface of the semicircular die Wherein the first and second flanges are bent to abut against each other.
3. The method of claim 2,
And a reinforcing portion (131) bent inward is formed at the bent outer end of the spacer (13).
The method of claim 1,
The semicircular formwork 14 is formed by bending a metal plate such that the valleys 141 and the valleys 142 are alternately formed and the longitudinal direction of the valleys 141 and the floor 142 is arranged in the circumferential direction of the column A circular prefabricated column structure.
The method of claim 1,
Characterized in that both ends of each semicircular mold (14) are welded to the outer surface of the spacer (13), and the perma- nent material (15) is detachably coupled with a distance between adjacent semicircular moldings (14) Prefabricated column structure.
The method of claim 5,
Wherein the blockage material (15) is a synthetic resin material.
The method of claim 1,
Wherein a steel pipe (16) is coupled between the upper and lower semicircular molds (14) in the panel zone where the beam (2) is coupled to the side, and a stud (17) Structure.
(a) drilling a plurality of column positions to approximate the circular pre-assembly column structure (1) according to any one of claims 1 to 7;
(b) placing concrete in the circular pre-assembly column structure (1);
(c) firstly disposing a lower portion of a position where the slab 3 is to be installed;
(d) attaching brackets (21) to both sides of the circular pre-assembly column structure (1);
(e) coupling the rail beam 22 to the ends of the bracket 21 to both sides of the circular pre-assembly column structure 1;
(f) installing a connecting beam (23) between adjacent rail beams (22);
(g) installing a deck plate (31) in a span other than the span where the circular pre-assembly column structure (1) is located;
(h) placing reinforcing bars on the deck plate (31) and casting the slab concrete (32);
(i) firstly making a second tidal wave to the lower part of the terahertz surface and casting the foundation (33);
(j) disposing a columnar reinforcing bar (41) outside the circular pre-assembly column structure (1);
(k) installing a mold (42) outside the pillar reinforcement (41); And
(1) Concrete is placed in the mold (42) to form the pillar (4), and a reinforcing bar is placed in a span where the circular pre-assembly column structure (1) ; ≪ / RTI > And a second pre-assembly column structure disposed on the second pre-assembly column structure.
9. The method of claim 8,
And a reinforcing member (24) coupled at one end to the end of the bracket (21) and at the other end to the side of the circular pre-assembly column structure (1) A method of using a fuel tank.
(a) installing a circular pre-assembly column structure (1) according to any one of claims 1 to 7 on the ground;
(b) attaching brackets (21) to both sides of the circular pre-assembly column structure (1);
(c) coupling the rail beam 22 to the ends of the bracket 21 to both sides of the circular pre-assembly column structure 1;
(d) installing a connecting beam (23) between adjacent rail beams (22);
(e) installing a deck plate (31) in a remaining span excluding a span where the circular pre-assembly column structure (1) is located; And
(f) placing reinforcing bars on the deck plate (31) and casting the slab concrete (32); Wherein the first pre-assembled column structure is formed of a first pre-assembled column structure.

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