KR200320805Y1 - Precast concrete member for column being connected in floor space and structure for connecting column by using of it - Google Patents

Abstract

The present invention relates to a precast concrete member for pillars connected in the floor space portion and the connection structure of the pillar of the building using the same, the joint between the multiple-layer PC pillar member and the multiple-layer PC pillar member is the upper side of the multiple-layer PC pillar member The mortar is injected into the lower injection hole of the sleeve in the state where the upper end of the reinforced part of the concrete portion is inserted into the lower portion of the sleeve of the concrete portion of the lower portion of the PC pillar member for the multi-layer PC, and the inner space portion of the sleeve and the PC pillar for the multiple layer are inserted. The mortar is filled up to a gap formed between the upper surface of the member and the lower surface of the PC pillar member so that the multiple pillar PC pillar member and the multiple pillar PC pillar member are connected in the space portion of each layer.

The present invention is able to significantly shorten the construction period, there is an effect that can reduce the processing cost of the joint portion and the material cost due to the reduction in the number of use of the sleeve in accordance with the reduction of the joint.

Description

PRECAST CONCRETE MEMBER FOR COLUMN BEING CONNECTED IN FLOOR SPACE AND STRUCTURE FOR CONNECTING COLUMN BY USING OF IT}

The present invention relates to a precast concrete member (hereinafter referred to as a PCS pillar member) for a column connected in a floor space part and a connection structure of a pillar of a building using the same, in particular, the site-cast concrete slab of each floor of the building Pillars can be installed regardless of the curing period of the slab, and for the pillars connected in the floor space configured to shorten the construction period and reduce the construction cost by reducing the joining points for joining the PC pillar members to each other. It relates to a precast concrete member and the connection structure of the pillar of the building using the same.

In modern times, despite the increase in population, residential houses and office buildings are limited, so in urban areas, which are overcrowded, the residential and office buildings are built on high floors, eliminating the shortage of residential and office space due to overcrowding. This is a well known fact.

The general construction method is the construction method using only the site-casting concrete in which all the slabs or pillars or walls, which are reinforced concrete floors, are placed on the site after the basic construction is carried out at the construction site (RC method). However, according to the construction method of a high-rise building using only the conventional cast-in-place concrete as described above, the hassle to install the formwork in order to cast concrete on all the corresponding parts in the site and the concrete cast in the formwork must be completely hardened. Since it is necessary to install the formwork on the above, the construction period is long, and the construction period is long, as well as the construction waste used in the construction of the site was generated, causing the environment to be polluted.

In addition, the noise and dust generated during the work together with the inefficient workability of installing and dismantling all the formwork for site casting contaminated the surrounding air at the construction site. And there was a problem that does not occur correctly and uniformly constructed.

In order to solve such a problem, the construction process of the conventional building, which is improved in the construction method of the building, is shown in FIGS. 1 to 3, and the rebar {(1a (hereinafter, And the slab 1, which is the reinforced concrete floor of the lowermost layer E, are exposed to a predetermined height at a predetermined interval from each other in the space part of the lowermost layer E. The height corresponding to the height from the upper surface of (1) to the lower surface of the preservation precast concrete member {2 (hereinafter, referred to as PC beam member)} of the upper layer {F (hereinafter referred to as the first upper layer), which is the upper layer thereof, After having put the predetermined position of the post-column member {3 (hereinafter referred to as a single-layer PC post member) formed on the slab 1 to be joined to the slab 1 while having a lower end, ,

The single-layer PC pillar member 3 manufactured at the factory is transported to a construction site, and the single-layer PC pillar members 3 are installed by placing the single-layer PC pillar member 3 at a predetermined position marked on the slab 1.

Then, after installing the PC beam member 2 on the upper surface of the single column PC pillar member 3,

After the precast concrete member for half slab (5 (hereinafter, referred to as PC half slab member)) is provided on the upper surface of the PC beam member 2,

Reinforcing bar portions 2a and 5a (hereinafter, referred to as reinforcing bar portions) exposed to the outside of the PC beam members 2 and the PC half slab members 5 are connected.

Then, after placing concrete on the upper side of the PC beam member 2 and the PC half slab member 5 including the upper side of the single-layer PC pillar member 3,

After curing the slab layer {6 (hereinafter referred to as concrete cast slab layer) concrete is poured in the field,

Filling the upper surface of the concrete cast-in-place slab layer (6) through the curing process,

By repeating the steps of installing the single column PC pillar member 3 at a predetermined position indicated on the upper surface of the hardened concrete cast slab layer (6),

The single-layer PC post member 3 manufactured by embedding a predetermined number of rebars {3a (hereinafter referred to as vertical rebars)} in the vertical direction inside the predetermined layer of the slab 1 of the lowermost layer E. The upper rebar exposure of the anchor reinforcing bars 1a, which are located at the position and are embedded in the slab 1 of the lowermost layer E, protrude from the slab 1 to a constant height inside the lower space E, and are exposed. Each sleeve having a portion 1aa embedded in the lower portion of the single-layer PC pillar member 3 and having a lower end portion of each vertical reinforcing bar 3a embedded in the single-layer PC pillar member 3 inserted thereon. After inserting into the lower side of 3b, the mortar is injected into the lower inlet 3ba of each sleeve 3b, and the mortar is filled in the inner space of the sleeve 3b so that the single pillar PC column member 3 ) Slab of the lowest layer (E) Be constructed such that each joint fixed to a predetermined position of the probe (1).

Then, after installing the PC beam member 2 on the upper surface of each of the single-layer PC pillar member 3, the PC half slab member (on the upper end of the PC beam member 2 and the PC beam member 2) 5) Install.

Then, the reinforcing bar exposed portion 2a of the PC beam member 2 and the reinforcing bar exposed portions 5a of the PC half slab member 5 are connected to each other, and then the upper side of the single layer PC pillar member 3 is connected. The concrete of the concrete cast-in-place slab layer has to be cured by curing after the concrete is poured in the field on the containing PC beam member 2 and the PC half slab member 5. An upper end portion of the vertical reinforcing bars 3a of the lower single-layer PC pillar member 3 protruding from the upper portion of the space portion of the first upper layer F, which is above it, to the first upper layer F. After inserting the lower inside of the sleeve 3b embedded in the lower portion of the other single-layer PC pillar member 3 to be installed, the mortar is injected into the lower inlet 3ba of the sleeve 3b, and then each sleeve 3b. Calmor tar in the inner space of the 4, by filling the mortar onto the lower side, the installation of each of the pillars to the top floor of the building is designed by construction to the exit repeat the same process for a single layer precast concrete pillar member 3 to connect to each other is completed up.

However, the lower single-layer PC pillar member 3 and the upper single-layer PC pillar member 3 on the upper surface of the cured and hardened concrete cast slab layer 6 of each layer are bonded to each other and connected to each other. The construction method is easier to construct than the construction method of installing the pillars by the concrete site casting, and it is possible to obtain a high quality pillar member, and the curing period of the pillar itself can be shortened, since the curing period of the pillar itself is not necessary. Although it has the effect of reducing the construction cost, etc., it is required to go through the process of marking the installation position of the PC pillar members for each single layer on the upper surface of each floor of the concrete site slab of the designed building. The height is equal to the height from the upper surface of the cast-in-place slab layer to the lower surface of the upper PC beam member that is the upper layer. After installing the ground column member 3 for the corresponding floor of the building, the formwork for horizontal structure G consisting of the PC beam member 2 and the PC half slab member 5 is installed thereon. After the concrete is poured into the formwork, the concrete of the cast-in-place slab layer 6 must be cured through curing, so that the pillars of the upper layer can be constructed, and then the feeding (0.5 days) and the concrete There was a problem that the construction period as long as the curing period (2 days) of the cast-in-place slab layer (6).

The present invention is devised to solve the problems in the construction method of the conventional building pillar,

The purpose of the present invention is not to connect each PC pillar member in the concrete cast slab layer of each floor of the designed building, but to connect the PC pillar members of the upper and lower parts to each other at a predetermined point in the space of each floor of the designed building. It is possible to install the PC pillar member of the building regardless of the curing period of the concrete cast-in-place slab layer by constructing it so that it can be connected. It is to provide a connection structure of the pillar pillar member and the pillar of the building using the same connected to the floor space.

Another object of the present invention is to prevent the cost of the construction by reducing the joint portion of the upper and lower PC pillars joined to each other and the sleeve buried place according to the PC pillar member connected to the floor space and using the same It is to provide the connection structure of the pillar of the building.

1 is a perspective view of a conventional precast concrete member for a column,

Figure 2 is a perspective view of the main portion of the PC beam member is installed on a conventional precast concrete member for pillar,

Figure 3 is a partial longitudinal cross-sectional view showing a connection structure of the pillar of the building using a conventional precast concrete member for pillar,

4 is a perspective view of the precast concrete member for the first pillar of the present invention,

5 is a perspective view of a precast concrete member for a second pillar of the present invention,

6 is a partially enlarged front view including a connection part of the precast concrete members for the first and second pillars of the present invention;

7 is a cross-sectional view taken along the line A-A of FIG.

8 is a longitudinal sectional view showing a connection structure of pillars of a building using precast concrete members for first and second pillars of the present invention;

Figure 9 is a perspective view of the main portion of the PC beam member is installed in the connection portion of the precast concrete member for the first or second pillar of the present invention,

10 is a perspective view of the main part cutaway of the portion where the first pillar precast concrete member and the second pillar precast concrete member or the second pillar precast concrete member of the present invention are connected to each other;

11a to 11d is a view showing the construction process of the pillar of the building using the precast concrete member for the first and second pillar of the present invention,

Figure 11a is a schematic perspective view of a state in which the precast concrete members for the first pillar of the present invention are respectively installed at a predetermined position of the slab,

FIG. 11B is a schematic perspective view of the PC beam member installed on the precast concrete members for the first pillar in FIG. 11A;

FIG. 11C is a schematic perspective view of the PC half slab member provided on the PC beam member in FIG. 11B;

FIG. 11D is a schematic perspective view of a state in which a second pillar precast concrete member is installed on upper sides of the first pillar precast concrete members in FIG. 11C;

FIG. 11E is a schematic perspective view of the state in which the site-pouring concrete is poured in FIG. 11D; FIG.

* Description of the symbols for the main parts of the drawings *

10: first PC pillar member for plural layers 11: second PC pillar member for plural layers

11a: lower concrete part 11b: upper concrete part

12: slab of lowest layer 13: horizontal structure of the first upper layer

14: horizontal structure of the second upper layer 15: pad mortar layer

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

The present invention is the lowest floor of a building so that the columns can be constructed regardless of the curing period of the concrete cast slab layer of a horizontal structure consisting of PC beam members, PC half slab members, and concrete cast slab layers. It is configured to be joined to each other by joining the PC pillar members at a predetermined point in the space portion that is inside of each layer,

First, a description will be given of the PC pillar member of the present invention.

As shown in FIGS. 4 to 11D, the PC pillar member of the present invention penetrates from the lowermost layer A to a predetermined position of the space portion of the first upper layer B, which is an upper layer thereof, while the first upper layer B is disposed. A first PC pillar member 10 (hereinafter referred to as a first PC pillar member for plural layers) to which a pillar is connected at the predetermined point of the space portion of the space;

A plurality of second column pillar members (11) which are sequentially installed in the respective layers above the plurality of layer first PC pillar members (10);

The first PC pillar member 10 for plural layers and the second PC pillar member 11 for plural layers or the second PC pillar member 11 for plural layers and the second PC pillar member 11 for plural layers are designed. It is comprised so that it may join and mutually connect at the predetermined point of the space part which is inside of a layer.

The first PC pillar member 10 for plural floors includes the PC beam member 13a, the PC half slab member 13c and the concrete of the first upper layer B from the top surface of the slab 12 of the lowest floor A of the designed building. A lower concrete part 10a which is molded at a height to a lower surface of the PC beam member 13a of the horizontal structure 13 composed of the cast-in-place slab layer 13b;

Is connected to the lower concrete portion (10a) is molded to a predetermined height of the space portion that is inside the first upper layer (B), which is just above the lowest floor (A) of the designed building in which the lower concrete portion (10a) is installed It is formed of the upper concrete portion (10b);

The upper concrete portion 10b and the lower concrete portion 10a of the first PC pillar member 10 for plural layers are integrally embedded at predetermined positions of the upper concrete portion 10b and the lower concrete portion 10a, respectively. It is connected to each other by the vertical reinforcing bars (10c), between the upper concrete portion (10b) and the lower concrete portion (10a) is formed a connecting portion (10d) consisting of only vertical reinforcement (10c), the vertical A sleeve 10aa to which the lower end of the reinforcing bar 10c is inserted and connected is embedded in the lower side of the lower concrete part 10a.

The first PC pillar member 10 for the plurality of layers is the same as the number of vertical bars 3a of the single pillar PC pillar member 3 for which the number of the embedded vertical reinforcing bars 10c is known, but the upper concrete part 10b is provided. The number of vertical rebars (10ca (hereinafter, referred to as reinforcing bar exposed portions)) exposed to the outside of the upper side of the number of rebar exposed parts (3aa) exposed to the outside of the top of the known single-layer PC post member (3) The number of the known anchor bars 12a of the slab 12 is lowered by about 50%, and the lower part of the lower concrete part 10a joined to each anchor bar 12a of the slab 12 of the lowermost layer. The same number of sleeves 10aa are embedded. (I.e., equal to the number of sleeves 3b embedded below the known single layer PC post member 3).

Therefore, the first PC pillar member 10 for a plurality of layers is formed with a reinforced bar portion 10ca provided on the upper side of the upper concrete portion 10b, where the joining point is a known single layer PC pillar member ( Rebar exposing portion 3aa provided on the upper side of 3) is formed, and is reduced to 50% of the joining position, which is a joining point, and the number of vertical reinforcing bars 10c of the connecting portion 10d is known. Consisting of 100% of the number of vertical reinforcing bars (3a) of the floor pillar pillar member (3), the sleeve 10aa provided on the lower side of the lower concrete portion (10a) is embedded to join The point is formed of a joining portion of 100%, such as a joining position where a sleeve 3b provided on the lower side of the known single-layer PC pillar member 3 is embedded and joined.

The second PC pillar members 11 for plural layers are sequentially constructed to the uppermost layer except for the lowermost layer on which the first PC pillar members 10 for plural layers are installed. ,

The second PC pillar member 11 for the plurality of layers is the PC beam member 14a of the second upper layer C from the upper surface of the concrete cast-in slab layer 13b of the horizontal structure 13 of the first upper layer B. The first PC pillar member for multiple layers above and below in the space portion up to and below the PC beam member 14a of the horizontal structure 14 composed of the PC half slab member 14c and the concrete cast slab layer 14b ( 10) except for the height of the pad mortar layer 15 to which the second PC pillar member 11 is bonded to each other and a predetermined height of the upper concrete portion 10b of the first PC pillar member 10 for the plurality of layers. A lower concrete part 11a which is molded at a height of;

The upper side which is connected to the lower concrete part 11a and is molded to a predetermined height inside the second upper layer C which is the upper layer of the first upper layer B on which the lower concrete part 11a is installed. It is formed of the concrete part 11b;

The upper concrete portion 11b and the lower concrete portion 11a of the second PC pillar member 11 for plural layers are respectively embedded at predetermined positions of the upper concrete portion 11b and the lower concrete portion 11a, respectively. It is connected to each other by integral vertical reinforcing bars (11c), the connection portion 11d is formed between the upper concrete portion (11b) and the lower concrete portion (11a), the lower end of the vertical reinforcement (11c) Is inserted into the upper portion of the inner space portion, and the sleeve 11aa is embedded in the lower side of the lower concrete portion 11a.

The second PC pillar member 11 for plural layers has the same number of reinforcing bars of the single pillar PC pillar member 3 as the number of embedded reinforcing bars, but the rebar exposure exposed to the outside of the upper concrete part 11b. The number of the portions 11ca is reduced to 50% than the number of the reinforcing bar exposed portions 3aa exposed to the outside of the known single layer PC pillar member 3, and the first PC pillar member for the plurality of layers ( The lower portion of the lower concrete portion 11a to which the reinforced exposed portion 10ca of the upper concrete portion 10b of 10) is joined to the number of the reinforced exposed portions 10ca of the first PC pillar member 10 for plural layers. The same number of sleeves 11aa are embedded. (I.e., 50% less than the number of sleeves 3b buried under the known single-layer PC pillar member 3).

Therefore, the second PC pillar member 11 for plural layers is formed with a bar exposed member 11ca provided at an upper side of the upper concrete portion 11b, where the joining point is a known single layer PC pillar member 3. Rebar exposed portion (3aa) provided on the upper side of the c) is reduced to 50% of the joining position, which is a joining point, and the number of vertical reinforcing bars (11c) of the connecting portion (11d) for the known single layer It is composed of 100% of the number of vertical reinforcing bars 3a of the PC pillar member 3, and is a joining point at which a sleeve 11aa provided at the lower side of the lower concrete part 11a is embedded and joined. The sleeve 3b provided below the known single-layer PC pillar member 3 is embedded and is reduced to 50% of the joining position rather than the joining position where the joining is performed.

Here, the joining point means that the anchor bars 12a of the known slab 12 and the sleeves 10aa buried under the lower concrete part 10a of the plurality of first PC pillar members 10 are bonded to each other. Buried in the reinforcement exposed portions 10ca of the upper concrete portion 10b of the first PC pillar member 10 for the location or the plurality of layers and the lower concrete portion 11a of the second PC pillar member 11 for the multiple layers. Where the joints are joined between the sleeves 11aa or the reinforcing bar portions 11ca of the upper concrete portion 11b of the second PC pillar member 11 for plural layers and the second PC pillar for other plural layers thereon. It means the place where the bonding is mutually formed between the sleeves 11aa embedded in the lower concrete part 11a of the members 11.

The number of vertical reinforcing bars (3a) of the known single-layer PC post member (3) is generally composed of 8, 12, 16 ..., etc., according to the upper, lower single-layer PC post member ( The junction point where the exposed rebar portion 3aa and the sleeve 3b of 3) are joined is also the same junction point as eight, twelve, sixteen, ..., etc. equal to the number of the vertical rebars 3a.

A connection portion 10d formed between each of the upper concrete portions 10b and 11b and the lower concrete portions 10a and 11a of the plurality of layers of the first PC pillar member 10 and the plurality of layers of the second PC pillar member 11. 11d is a portion composed only of vertical reinforcing bars 10c and 11c, in which upper and lower portions are embedded in upper and lower concrete portions 10a, 11a, 10b and 11b, respectively, and concrete is not formed. The horizontal structures 13 and 14 are respectively installed at the connecting portions 10d and 11d.

And, the bottom surface of the upper concrete portion (10b, 11b) of the first PC pillar member 10 and the second PC pillar 11 for the plurality of layers is formed with air layer formation preventing protrusions (10ba, 11ba), When the concrete is cast in the field on the PC half slab members 13c and 14c of the horizontal structure 13 and 14 of each layer by the air layer formation preventing protrusions 10ba and 11ba, the upper concrete portion ( The air layer is not formed in the inner portion of the bottom of 10b) and 11b, and the first PC pillar member 10 and the second PC pillar member 11 for multiple layers or the second PC pillar members 11 for multiple layers are firmly formed. Joining is made.

Between the upper concrete part 10b and the lower concrete part 10a of the first PC pillar member 10 for plural layers or the upper concrete part 11b and the lower concrete part of the second PC pillar member 11 for plural layers ( The heights of the connecting portions 10d and 11d made up of only the vertical reinforcing bars 10c and 11c without the concrete being formed between 11a) are the PC beam members 13a and 14a and the PC beam members 13a and 14a. After installing the half slab members 13c and 14c on the upper surface of the floor, the heights up to the concrete cast slab layers 13b and 14b, that is, the same height as the height of the horizontal structure 13 and 14b. Have

The structure in which the slab 12 of the lowermost layer A and the lower concrete portion 10a of the first PC pillar member 10 for plural layers are joined and connected is the lowest layer of the first PC pillar member 10 for plural layers. It is located above the pad mortar layer 15 formed at a predetermined point of the slab 12 of (A), so that the upper end portions of the anchor bars 12a of the slab 12 are lower than the first PC pillar member 10 for the multiple layers. Lower injection holes of the sleeve 10aa in a state where the lower ends of the vertical reinforcing bars 10c of the concrete part 10a are inserted into the space inside the lower side of the sleeve 10aa embedded in the state of being inserted into the inner space of the upper side ( The mortar is filled into the inner space of the sleeve 10aa by injecting the mortar into 10aa ") so that the slab 12 of the lowest layer A and the first PC pillar member 10 for multiple layers are firmly connected. .

In addition, the structure in which the first PC pillar member 10 for plural layers and the second PC pillar member 11 for plural layers are joined to each other is connected to each other in a space of each floor of a designed building, and the first PC for multiple layers. The second PC pillar member 11 for plural layers is located on the upper surface of the upper concrete portion 10b of the pillar member 10, and is formed in the upper concrete portion 10 b of the first PC pillar member 10 for plural layers. The buried portion of the sleeve 3b of the PC column member 3 for which the known single-layer PC pillar 3 is 50% smaller than the number of the vertical bars 10c penetrating the connecting portion 10d. The space inside the lower side of the sleeve 11aa of the lower concrete portion 11a of the second PC pillar member 11 for plural layers in which the same number of sleeves 11aa as the number of the rebar exposed portions 10ca are embedded. Lower injection of the sleeve 11aa in the inserted state Mortar is injected into 11aa 'so that the mortar is filled in the gap formed between the inner space of the sleeve 11aa and the upper surface of the first PC pillar member 10 for plural layers and the lower surface of the second PC pillar member 12. The first PC pillar member 10 and the second PC pillar member 11 for plural layers are firmly connected to each other, and the connection structure between the second PC pillar members 11 for plural layers is also the first, It is the same as the connection structure between the second PC pillar members 10 and 11.

Between the upper concrete part 10b and the lower concrete part 10a of the first PC pillar member 10 for plural layers or the upper concrete part 11b and the lower concrete part of the second PC pillar member 11 for plural layers ( The structure in which the horizontal structures 13 and 14 are connected to the connecting portions 10d and 11d for connecting the horizontal structures 13 and 14 respectively formed between 11a) is the first PC pillar member for multiple layers. The edge portion of the upper surface of the lower concrete portion 10a forming the connecting portion 10d of 10) or the edge portion of the upper surface of the lower concrete portion 11a of the connecting portion 11d of the second PC pillar member 11 for plural layers. The ends of the PC beam members 13a and 14a are provided to contact each other, and the PC half slab members 13c are installed to contact one side of the bottom surface with one side of the upper surface of each of the PC beam members 13a and 14a. The upper side of the first PC pillar member 10 or the second PC pillar member 11 for the plurality of layers and the On the upper side of the PC beam member 13a, 14a, PC half slab member 13c, 14c, which is installed at the site, is composed of concrete cast-in-place slab layers 13b, 14b that are hardened by casting of concrete at the site. Horizontal structures 13 and 14 are provided.

The upper surface of the upper concrete portion 10b of the first PC pillar member 10 for multiple layers and the lower surface of the lower concrete portion 11a of the second PC pillar member 11 for multiple layers or the second PC pillar member 11 for multiple layers. The lower surface of the lower concrete portion 11a of the second PC pillar member 11 for plural layers, which is different from the upper surface of the upper concrete portion 10b), is not a smooth and flat surface but is an uneven surface. The second PC pillar member 11 for plural layers is placed on the layer 10, or the second PC pillar member 11 for plural layers is placed on the second PC pillar member 11 for plural layers. A gap is generated in the remaining portions except for a portion in which the pillar member 10 and the second PC pillar member 11 or the second PC pillar member 11 for plural layers are in contact with each other, so that an upper outlet of the sleeve 11aa 11aa ') with the stopper The mortar layer injected into the side injection hole 11aa "is filled with not only the inside of the sleeve 11aa but also to the gap, and the pad mortar layer is formed at the portion where the first and second PC pillar members 10 and 11 contact each other. The first and second PC pillar members 10 and 11 are firmly bonded to each other.

When the first PC pillar member 10 is installed on the slab 12 and when the second PC pillar members 11 are installed above the first PC pillar member 10, the first PC pillar member 10 or The first or second PC pillar member 10 in a state in which the first PC pillar member 11 is supported by a support (not shown) and fixed while the second PC pillar member 11 is placed thereon. (11) may be bonded to the slab 12 or the first PC pillar member 10 of the lowermost layer A.

In the drawing, reference numeral 14aa denotes a rebar embedded in the PC beam member 14a of the second upper layer C, 14aa ′ is a rebar exposed portion exposed to the outside of the embedded rebar 14a, and 14ca denotes the PC half slab. The rebar embedded in 14c, 14ca 'is a rebar exposed portion exposed to the outside of the embedded rebar 14ca, and 16 is an outer wall portion.

Construction of a column using the first and second PC pillar members 10 and 11 for a plurality of layers of the present invention is carried out as follows.

The anchor reinforcing bars (12a) on the slab (12) of the lowest floor (A), the concrete floor on which the pillars are installed in the building is embedded by protruding to a predetermined height while maintaining a constant distance into the interior of the lower floor (A) ,

The upper concrete portion 10b while joining and connecting the lower concrete portion 10a of the first PC pillar member 10 for plural layers manufactured and transported to the anchor reinforcement 12a of the slab 12 of the lowermost layer A. The first PC pillar member 10 for a plurality of layers is placed upright while passing through a portion where the horizontal structure 13 of the first upper layer B is to be formed to a predetermined point of the space portion of the first upper layer B). The first PC pillar member 10 for plural layers is joined to and connected to the slab 12 of the lowest layer A so as to stand in a state.

Then, the reinforcing bar 13a is embedded at regular intervals, and the reinforcement bar 13a 'formed with the reinforcing bar exposed portion 13aa' is formed on the upper side of the plurality of first PC pillar members 10. After installing on the connecting portion 10d,

After the reinforcing bars 13ca are embedded at regular intervals, the PC half slab members 13c having the reinforcing bar exposed portions 13ca 'formed on the upper side are formed on the upper sides of the PCBO members 13a. ,

The reinforcing bar portions 13aa 'and 13ca' of the PC beam member 13a and the PC half slab member 13c are connected to each other.

Next, the lower concrete portion 11a of the second PC pillar member 11 for plural layers is joined to and connected to an upper surface of the upper concrete portion 10b of the first PC pillar member 10 for plural layers, for the plurality of layers. A predetermined point of the space portion inside the second upper layer C through the portion where the upper concrete portion 11b of the second PC pillar 11 passes through the portion where the horizontal structure 14 of the second upper layer C is to be formed. After installing the second PC pillar member 11 for a plurality of floors so as to stand up to stand upright,

Concrete is poured on the upper side of the horizontal structure 13 of the first upper layer (B).

Then, at the same time as the curing process of the concrete cast-in-place slab layer 13b in which the concrete was poured, the PC beam member 14a and the PC half slab member were connected to the connection part 11d of the second PC pillar member 11 for the multiple layers. To install 14c,

The second PC pillar member 11 for multiple layers to the uppermost layer by repeating the same construction process as the process of bonding the second PC pillar member 11 for multiple layers to the first PC pillar member 10 for multiple layers. By installing them, the construction of the pillars on each floor of the building is completed.

In the present invention, only the slab 12 of the lowermost layer (A) is fed, and from the first upper layer (B) or more except for the lowermost layer (A), the feeding operation is not necessary.

Here, in the bonding between the lowermost slab 12, the first PC pillar member 10 for plural layers, the first PC pillar member 10 for plural layers, and the second PC pillar member 11, each sleeve ( The connection between the 10aa) 11aa and each of the reinforced bar portions 12aa and 10ca is performed by the sleeve 10aa of the lower concrete portion 10a of the first PC pillar member 10 for the plurality of layers or the second PC pillar member for the multiple layers. After inserting the reinforcing bar portions 12aa of the anchor reinforcing bars 12a or the reinforcing bar portions 10ca of the vertical reinforcing bars 10c, respectively, in the lower portion of the sleeve 11aa of the lower concrete part 11a of (11), Closing the upper outlet 10aa 'or the upper outlet 11aa' of the sleeve 10aa or the sleeve 11aa with a stopper and then the lower inlet 10aa "or lower inlet of the sleeve 10aa or the sleeve 11aa ( 11aa ") may be injected, and the inside of the sleeve 10aa or the sleeve 11aa may be filled with mortar and joined.

The operation of the present invention configured as described above will be described.

On the slab 12 of the lowermost layer A, the exposed rebar exposed portions 12aa of the anchor reinforcing bars 12a protruding to a predetermined height while being maintained at a predetermined interval inside the lowermost layer A are spaced. After inserting into the lower inner space of the sleeve 10aa embedded in the lower portion of the first PC pillar member 10 for plural layers, the lower inlet 10aa 'is closed with a plug. It is the same as that of the conventionally known art, but the mortar is injected into the space and the mortar is injected into the space inside the sleeve 10aa, but the first PC pillar member 10 for plural layers and the plural layers are made. 2 Connection part 10d consisting of only vertical reinforcing bars 10c and 11c without concrete being formed between the upper concrete parts 10b and 11b and the lower concrete parts 10a and 11a of the PC pillar member 11. A PC beam provided with a height of 11d in the first PC pillar member 10 for plural layers. The height of the horizontal structure 13 which is the height from the member 13a to the slab layer 13b cast on the concrete after the PC half slab member 13c is installed on the upper surface of the PC beam member 13a. The horizontal structure is connected to the connecting portion 10d for connecting the horizontal structure 13 formed between the upper concrete portion 10b and the lower concrete portion 10a of the first PC pillar member 10 for the plurality of layers. (13) is comprised so that it may be installed.

Then, the second PC pillar member 11 for plural layers is placed on the upper surface of the upper concrete part 10b of the first PC pillar member 10 for plural layers, and the upper concrete of the first PC pillar member 10 for plural layers is placed thereon. The upper ends of the vertical reinforcing bars 10c of the part 10b are inserted into the space inside the lower part of the sleeve 11aa embedded in the lower part of the lower concrete part 11a of the second PC pillar member 11 for plural layers. After the upper outlet 11aa 'of the sleeve 11aa is plugged, the mortar is filled into the inner space of the sleeve 11aa by continuously injecting mortar into the lower inlet 11aa ", and the first and the second 2 The construction of installing the pillars of the building by repeating the construction method so that the mortar is filled and connected to the gap between the pillar pillar members 10, 11 is connected to the top floor pillars Cast Slab Independent of the curing of the layers 13b and 14b.

Therefore, when constructing the pillar with the conventional single-layer PC column member 3, it is fed (0.5 days), the assembly of the single-layer PC column member 3, the assembly of the PC beam member 2, the PC half slab member ( 5) assembly, the reinforcement of the reinforcing bar exposed portions 2a and 5a exposed on the upper parts of the PC beam members 2 and PC half slab members 5, the electrical equipment piping, and the upper concrete of the horizontal structure G. After placing and curing (2 days), it was not possible to assemble the other single-layer PC pillar member 3 of the upper layer, but at the time of constructing the pillar of the present invention, the first upper layer B of the upper layer except for the lowermost layer A was more than No feeding is necessary, and the assembly of the first PC pillar member 10 for plural layers, the assembly of the PC beam member 13a, the assembly of the PC half slab member 13c, the PC beam members 13a and the PC half slab Reinforcement of the rebar exposed portions 13aa 'and 13ca' exposed to the upper portion of the member 13c, piping for electrical installations, and a second layer for multiple layers. The assembly of the seed pillar member 11, the placing of the upper concrete of the horizontal structure 13, and the beginning of the curing process, the assembly process of the PC beam member 14a of the second upper layer (B) is repeated while continuing to repeat the process. Since it is possible to assemble PC layers for multiple layers of layers, it is possible to proceed immediately to the next work without having to wait for the work due to feeding and curing sequentially, so that the construction period of about 2.5 days (15%) can be achieved. It can be shortened.

The number of vertical reinforcing bars 10c embedded in the first PC pillar member 10 for plural layers or the vertical reinforcing bars 11c embedded in the second PC pillar member 11 for plural layers is a conventional single column PC pillar member. Rebar exposed portion 10ca and sleeve 10aa and second which are the same number as the number of vertical reinforcing bars 3a embedded in (3) but above and below the first PC pillar member 10 for plural layers. The bar exposed portion 11ca and the sleeve 11aa, which are upper and lower joining portions of the PC pillar member 11, are reduced to 50% of the corresponding joining positions of the conventional PC pillar member 3 for single layer. However, the reason why the normal strength can be maintained even if the location of the upper reinforcing bar exposed portion or the lower sleeve formed in the conventional single-layer PC pillar member 3 in this way is greatly reduced by half.

In general, the column stress of a ramen frame has a maximum moment value at the top and bottom of the column (which is the point where the greatest force is applied), while the moment value at a predetermined point in the space of the column has a maximum value. As the moment value decreases, the moment value becomes "0", and its inflection point (the point where the moment becomes "0") appears almost in the middle of the floor. 하여 Designing by determining the required connection point of the vertical reinforcing bar, in consideration of this point, when connecting the columns at the site corresponding to the inflection point, the first and second PC post members 10, 11 are joined to each other by the moment value It is possible to greatly reduce the location of the reinforcing bar exposed portion 10ca (11ca).

As described above, the position of the inflection point is not exactly the middle portion of each layer space portion, and the position of the inflection point also varies slightly depending on the applied load, but half of the moment value acting on the upper and lower ends of the column. Considering the degree of design, it is possible to reduce the number of joints that are joined to each other to 50%, thereby reducing the number of installation of the rebar exposed portion or sleeve to 50% than before,

In the prefabricated method such as PC member, the sleeve is relatively expensive and the processing cost of the joint is expensive, and the upper and lower vertical reinforcing bars connecting the first, second PC pillar members or the second PC pillar members are joined to each other. It is possible to reduce the construction cost by reducing the phosphorous bonding point.

Therefore, the upper concrete portion 10b of the first PC pillar member 10 for plural layers and the lower concrete portion 11a of the second PC pillar member 11 for plural layers, or the second PC pillar member for the plural layers in succession. (11) The first upper layer except for the lowermost layer A, that is, the points where the lower concrete portion 11a of the second concrete pillar member 11 for plural layers connected to the upper concrete portion 11b and the upper portion is joined. In each of the layers (B) and above, the points at which the upper and lower concrete portions 10a, 11a, and 11b are joined to each other are horizontal structures 13 and 14 of the first upper layer B and the second upper layer C. Rather than being joined to each other in the above, the space is between the horizontal structures 13 and 14 and the horizontal structures 13 and 14 of each layer, and the first and second layers for upper and lower multiple layers are formed at approximately mid points of the space portions of the respective layers. Most preferably, the second PC pillar members 10 and 11 or the second PC pillar members 11 are bonded to each other.

The reason is that the point where the acting moment becomes "0", that is, the point where the least force is almost the middle point of each layer, is the first and second PC pillar members 10 for the upper and lower multiple layers at this intermediate point. (11) or the second PC pillar member 11 is most preferably bonded to each other, in this case, the upper concrete portion 10b of the first PC pillar member 10 for plural layers and the second PC pillar member 11 for plural layers. The upper and lower concrete parts 11a and 11b of both sides become substantially the same height.

Of course, the first and second PC pillar members 10 and 11 for upper and lower layers may be joined to each other not only at an almost intermediate point of each layer but also at any other point in the space portion of each layer.

As described above, the present invention is a predetermined point of the space portion of each floor of the building so as to continue to install the pillars of the building without having to wait sequentially for curing and curing of the concrete site slab layer (13b, 14b) The construction period can be significantly shortened because the construction is performed by a construction method of joining and connecting the first and second PC pillar members for a plurality of layers to each other.

Conventional single-layer PC column members are formed by joining the reinforcing bar portions 10ca and 11a of the vertical reinforcing bars 10c and 11c embedded in the first and second PC pillar members 10 and 11 for multiple layers. Since the rebar exposed portions 3aa of the vertical reinforcing bar 3a of (3) are reduced by half compared to the place where the joints are made, the cost of processing the joint and the material cost due to the decrease in the use quantity of the sleeve are reduced. There is an effect that can be reduced.

Claims (7)

The first PC pillar member for plural floors is formed at the height from the upper surface of the lower floor slab of the building to the lower surface of the PC beam member of the first floor, and the lower concrete part in which the sleeve coupled to the lower end of the vertical reinforcement embedded therein is embedded at the lower side. Wow; A connection part comprising a vertical reinforcing bar having a predetermined length between the lower concrete part and the upper concrete part to connect a horizontal structure; The precast concrete member for the pillar, characterized in that formed in the upper portion of the upper portion of the first upper space is formed with a predetermined height of the vertical reinforcement is embedded in the vertical reinforcement is exposed to the upper surface. The second PC pillar member for a plurality of floors is formed at a height from a predetermined height of a first upper floor of a building to a predetermined height of a second upper floor, and includes: a lower concrete part in which a sleeve coupled to a lower end of a vertical reinforcement inserted therein is embedded; A connection part consisting of only a vertical reinforcing bar connected to a horizontal structure between the lower concrete part and the upper concrete part; Precast concrete member for the pillar, characterized in that formed in the upper portion of the upper portion of the second upper space is formed with a predetermined height of the vertical reinforcement is embedded in the vertical reinforcement is exposed to the upper surface 3. The precast concrete member for pillar according to claim 1 or 2, wherein the plurality of PC pillar members are connected at an inflection point of the space portion of each layer. According to claim 1, wherein the vertical reinforcement of the first pillar pillar member is formed by the number of the rebar exposed portion exposed to the upper surface of the upper concrete portion 50% less than the number of vertical reinforcing bars through the connection, the entire Precast concrete member for the pillar, characterized in that the lower end of the vertical reinforcing of the lower concrete portion is connected to the sleeve. The method of claim 2, wherein the vertical reinforcing bar of the second PC post member is formed with a 50% reduced number of the vertical reinforcing bar through the connection portion of the reinforcing bar exposed portion is exposed to the upper surface of the upper concrete portion, Precast concrete member for the pillar, characterized in that the lower end of the vertical reinforcing bar is formed exposed portion is connected to the sleeve of the lower concrete portion. The precast concrete member for pillar according to claim 1 or 2, wherein an air layer formation preventing protrusion is formed inside a bottom surface of each upper concrete portion of the first PC pillar and the second PC pillar. The joint between the multiple-layer PC pillar member and the multiple-layer PC pillar member is inserted into the space portion of the inner lower portion of the sleeve of the lower concrete portion of the upper concrete portion of the upper concrete portion of the multiple-layer PC pillar member. The mortar is injected into the lower injection hole of the sleeve and the mortar is filled to a gap formed between the inner space of the sleeve and the upper surface of the multilayer pillar pillar and the lower surface of the pillar pillar member to fill the pillar pillar member and the multilayer for the multilayer Connection structure of pillar of building using precast concrete member for pillar, characterized in that the pillar pillar member is connected in the space of each floor.