KR100733837B1 - The plural story - one node precast concrete column and construction method using it - Google Patents

Abstract

A multistory one-joint precast concrete column is provided to heighten constructability by reducing a craning process and a craning weight by split-manufacturing a PC(precast concrete) column and decreasing unit weight. The multistory one-joint precast concrete column(10) comprises primary and secondary built-up columns(10a,10b) which are manufactured separately to be symmetric to each other and provided with many bolt holes(15) to assemble with each other by many connecting bolts(14) in a construction site. The primary and secondary built-up columns are formed to make many vertical bars(20) and diagonal bars(30) exposed to a space between columns(11,12,13) of each story coupled with a PC beam, wherein the vertical bars are arranged on each corner of the primary and secondary built-up columns in the longitudinal direction to connect and support the spaced columns of each story, and the diagonal bars are arranged on the inside of the vertical bars to prevent lateral buckling on a joint between the PC column and the PC beam.

Description

The plural story-one node precast concrete column and construction method using it}

1 is a longitudinal cross-sectional view showing a multi-layered one-section PC column according to the present invention.

Figure 2 is a longitudinal cross-sectional view showing a PC beam-column coupling structure of a multi-layer 1-section PC column according to the present invention.

3 is a cross-sectional view taken along line AA ′ of FIG. 2.

Figures 4a to 4d is a step-by-step illustration of the construction method using a multi-layered 1 section PC column according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: multi-layered 1 PC column 10a, 10b: first and second PC assembly pillar

11, 12, 13: Each floor pillar in the first floor PC column on the third floor

14: connecting bolt 15: bolt hole

20: vertical rebar 30: inclined rebar

40: PC beam 50: Pour concrete joint

The present invention relates to a two-layered precast concrete column (hereinafter referred to as a 'PC pillar') and a construction method using the same. The present invention relates to a multi-layered one-section PC column and a construction method using the same to improve the workability by dividing the weight by reducing the weight.

The PC method is a method of constructing a prefabricated building by combining the unit units manufactured in the factory as separate members in advance. However, when building buildings in a prefabricated manner, there is a problem that the joining process between the unit members is not easy, and if the joining unit is not properly processed, there is a problem in the structural safety because the unity is not secured. Done. Accordingly, in order to construct by applying the PC method in the field, it is emerging as a very important technical problem to prepare the detail of the appropriate coupling portion for coupling between the members.

In particular, in such a PC method, the beam-column coupling portion connecting the PC pillar and the PC beam is in charge of the coupling while stably supporting the vertical load and the horizontal load, and the importance of the structural details becomes more important.

In this regard, the present applicant has proposed a multi-layered PC column that can be constructed with three or more PC columns in one section by increasing the buckling load of the PC beam-column coupling portion in Korean Patent Application No. 2006-0049000 to improve the bearing capacity of the coupling portion. have.

However, the multi-layer PC column presented in the patent application No. 2006-0049000 has the advantage of shortening the construction period by reducing the lifting process and concrete placing process, but with the weight of the multi-layered PC column made of multiple layers during transportation and lifting There was a difficulty to be more careful.

Therefore, the present invention has been developed in view of the above problems, and an object of the present invention is to reduce the weight of the lifting process and the concrete placing process of the joints and to carry and lift by reducing the unit weight by dividing the PC column to be constructed in a single-layer double deck It is to provide a multi-layered single-section PC column and a construction method using the same to facilitate the construction to improve the ease of construction.

It is also an object of the present invention to provide a double-layered PC column and a construction method using the same so that it is possible to reduce the unit weight of the multi-layered single-wall PC pillar to configure a large-sized multilayer PC column.

In order to achieve the above object, the multi-layer 1-section PC pillar according to the present invention is composed of one or more two layers, and the PC beam is coupled to the spaced space between the pillars of each layer, and is manufactured by splitting the left and right symmetrically and assembling each other by a plurality of connecting means. It is characterized by.

In addition, the construction method using a multi-layered single-section PC pillar according to the present invention, each column pillar is spaced a predetermined distance two or more layers composed of one section, and the multi-layered single-section PC column made by splitting left and right symmetrically placed in a predetermined position A first step of connecting to each other using a connecting means; A second step of jointing and grouting the lowermost vertical reinforcing bar of the first-tier PC column with the reinforcing bar or the uppermost vertical bar of the existing first-tier PC column; A third step of installing the PC beams by seating the ends of the PC beams in the interlayer spaces of the multi-layer 1-section PC columns assembled by the above; A fourth step of placing concrete by joining the PC beam-column coupling unit to which the first-tier PC column and the PC beam are coupled; And a fifth step of installing the PC slab between the PC beam and the PC beam.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a longitudinal cross-sectional view showing a multi-layered 1 column PC column according to the present invention, Figure 2 is a longitudinal cross-sectional view showing a PC beam-column coupling structure of a multilayer single-section PC column according to the present invention, Figure 3 A cross-sectional view of the AA ', Figure 4a to Figure 4d is a step-by-step showing the construction method using a multi-layered 1 section PC column according to the present invention.

Multi-layered 1 section PC column 10 according to an embodiment of the present invention is composed of three layers of a single section PC beam 40 is coupled to the spaced space between the pillars of each floor. Such a multi-layered one-section PC column 10 is divided into a first and a second PC assembly pillar (10a 10b) formed symmetrically, and are assembled to each other by a plurality of connecting bolts 14 in the field. At this time, a plurality of bolt holes for connecting the first and second PC assembling columns (10a, 10b) between the first and second PC assembling columns (10a, 10b) to the connection bolt (14). (15) is formed.

The first and second PC assembly columns (10a, 10b) is a plurality of vertical reinforcement 20 and the inclined rebar 30 in the spaced space of each column pillar (11, 12, 13) to which the PC beam 40 is coupled It is formed to be exposed (see Fig. 2). In this case, the vertical reinforcement 20 is connected to the first and second PC assembly pillars (10a, 10b) in the longitudinal direction to support the connection between each column pillar (11, 12, 13) spaced a predetermined interval, It is arrange | positioned near each edge of the 1st and 2nd PC assembling columns 10a and 10b, respectively (refer FIG. 3).

The inclined rebar 30 is installed to prevent horizontal buckling from the PC beam-column coupling portion to which the multilayer PC pillar 10 and the PC beam 40 are coupled, and the middle portion extends inclined from both ends. The upper and lower ends are formed at the upper and lower ends between the pillars 11, 12, and 13, respectively, so that the two cores are formed to cross each other and the middle part is disposed in the space between the pillars 11, 12, and 13 of each layer. The inclined rebar 30 is disposed adjacent to the vertical reinforcing bar 20 to the inside of the vertical reinforcing bar 20, and the intersection where the reinforcing bar crosses welds the middle of one vertical reinforcing bar, The vertical reinforcing bar can be specially manufactured with the middle part crossing.

The first and second PC assembly pillars 10a and 10b are connected by the connecting bolts 14, and the PC beams are seated on the PC beam-coupling joints, which are spaced between the pillars 11, 12 and 13. When the concrete is poured into the coupling portion is structurally integrated.

As described above, when constructing by separating and assembling a multilayer tier 1 PC column, the external force resisted by the multilayer tier 1 PC column 10 can be largely classified into axial force, moment, and shear force. The mechanism to resist each external force is as follows.

The axial resistance mechanism of the multilayer single-wall PC pillar is joined to the first and second PC assembling columns 10a and 10b separately manufactured left and right, thereby increasing the size of the cross section of the column and effectively resisting a large celebration.

In the moment resistance mechanism of the multilayer single-wall PC pillar, the cross section of the first and second PC assembly pillars 10a and 10b fastened by the connecting bolts is integrated, thereby ensuring the resistance to the moment. In addition, the moment resistance performance can be secured by increasing the reinforcement of the individual columns or changing the arrangement.

The shear force resistance mechanism of the multilayer single-ply PC column is similar to the moment resistance in that the two columns fastened by the connecting bolt 14, that is, the cross-sections of the first and second PC assembly columns 10a and 10b, are integrated into the shear force. Resistance performance is ensured. In addition, since the connecting bolts 14 themselves connecting the first and second PC assembly columns 10a and 10b also have a resistance against shear, sufficient resistance against shear force can be secured.

Such a double-layered PC column is mainly used for structures that require large columns with large axial forces. In other words, it can be used in a long span underground parking lot that requires fast construction, a low-rise portion of a high-rise building that is subjected to a large force, or a sports facility or a factory facility that requires fast construction, a long span, and high quality.

Multi-layer single-section PC column according to the present invention can be constructed by manufacturing more than three layers of multi-layer single-section PC column that could only be produced in two layers and one section due to its structural limitations due to the PC beam-column coupling structure as described above. In addition, by separating and manufacturing a multi-layered PC column can reduce the weight of the weight during transport and lifting can also improve the workability.

Hereinafter, with reference to Figures 4a to 4d will be described in detail the construction method using a multilayer single-section PC column according to the present invention.

Figure 4a is a step showing the step of erecting a multi-storey 1-section PC pillar using a temporary post, divided into left and right symmetrical and each floor pillars (11, 12, 13) spaced a predetermined distance, the first and third The second PC assembly posts (10a, 10b) are erected using a plurality of connecting bolts (14) after standing up to correspond to each other in the vertical direction.

Figure 4b shows the step of reinforcing and grouting the lowest vertical reinforcement of the first-tier PC column 10, the bottom vertical reinforcing bar 21 of the multi-layer PC column 10, the base reinforcement 22 or the existing multi-layer PC The uppermost vertical reinforcing bars and reinforcing bars of the column are grouted with mortar (23) and the like.

Figure 4c is a step showing the installation of each floor PC beam in the space of the multi-stage 1 PC column, each floor PC beam (in each of the spaces between the columns (11, 12, 13) of the double layer 1 PC pillar (10). The end of 40) is seated, and three layers of PC beams 40 are installed at the same time.

Figure 4d shows the step of placing concrete in the PC beam-column coupling portion, by placing concrete 50 in the PC beam-column coupling portion to which the multi-layer PC pillar 10 and PC beam 40 is coupled The multilayer PC column 10 and the PC beam 40 are integrated.

Thereafter, a PC slab (not shown) is installed between the PC beam 40 and the PC beam 40 to complete the three-layer frame construction.

On the other hand, the above-described multi-layer single column PC column according to the embodiment of the present invention has been described mainly applied to a multi-layer PC column for three layers 1 section, even in the case of a multi-layer PC column that is two or one layer or three or more layers. Of course it is applicable. That is, the present invention is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, according to the present invention, by reducing the unit weight by dividing the production of the PC pillar to be constructed in one section of the double layer to reduce the lifting process and the concrete placing process of the joint portion, it is also easy to transport and lift to improve the workability Has the effect.

In addition, the present invention can reduce the unit weight of the multi-layered single-wall PC column can constitute a large cross-section PC column.

In addition, the present invention can improve the construction speed by the construction of a multi-layered 1 PC column, and has the effect of achieving the safety of the assembly construction by placing the joint.

Claims (4)

In the double-layer precast concrete column (hereinafter referred to as the 'PC pillar'), Two or more floors are composed of one section, PC beam is coupled to the spaced space between the pillars of each floor, bilateral one-section PC pillar, characterized in that the left and right symmetrical split is assembled by a plurality of connecting means. The method of claim 1, Coupling portion between each column pillar coupled PC beam and a plurality of vertical reinforcing bars connected in a vertical direction to the multi-layer PC pillar; The middle portion extends inclined from both ends and is formed to cross each other in two pieces, and the upper and lower ends include a plurality of inclined rebars respectively embedded in the upper and lower ends of the pillars so that the intermediate portion is disposed in the space space between the pillars of each floor. Duplex one section PC pillar to say. In the construction method using a multi-layer PC column, A first step in which the pillars of each floor are spaced apart by a predetermined distance and consisted of one or more sections, each of which has a single-layered PC pillar that is divided into left and right symmetrically and is connected to each other using a plurality of connecting means; A second step of jointing and grouting the lowermost vertical reinforcing bar of the first-tier PC column with the reinforcing bar or the uppermost vertical bar of the existing first-tier PC column; A third step of installing the PC beams by seating the ends of the PC beams in the interlayer spaces of the multi-layer 1-section PC columns assembled by the above; A fourth step of placing concrete by joining the PC beam-column coupling unit to which the first-tier PC column and the PC beam are coupled; And Construction method using a multi-layered 1-section PC column characterized in that the fifth step of installing a PC slab between the PC beam and the PC beam. The method of claim 3, Coupling portion between each column pillar coupled PC beam and a plurality of vertical reinforcing bars connected in a vertical direction to the multi-layer PC pillar; The middle portion extends inclined from both ends and is formed to cross each other in two pieces, and the upper and lower ends include a plurality of inclined rebars respectively embedded in the upper and lower ends of the pillars so that the intermediate portion is disposed in the space space between the pillars of each floor. Construction method using double layer 1 PC column to be.

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