WO2020130206A1

WO2020130206A1 - Precast column and foundation connection structure, and precast column construction method using same

Info

Publication number: WO2020130206A1
Application number: PCT/KR2018/016472
Authority: WO
Inventors: 신명규; 이재호; 김도학; 박종헌; 김군삼
Original assignee: 지에스건설 주식회사; (주)유로엔지니어링
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2020-06-25

Abstract

Provided, according to the present invention, is a column and foundation connection structure comprising a precast column (1) and a foundation (2), the column and foundation connection structure comprising: column embedded reinforcing bars (100) embedded in a column (1); foundation embedded reinforcing bars (200) each having one portion thereof embedded in a foundation (2) and the upper end portion (210) thereof exposed; and connection parts (300) for integrating the column embedded reinforcing bars (100) and the foundation embedded reinforcing bars (200), wherein the connection parts (300) are formed at an end portion of the column (1), and each comprise a lead-in space (310) in which the upper end portion (210) is inserted. According to the present invention, an effect is achieved whereby construction time may be reduced, and safety in construction may be increased.

Description

Connection structure of precast column and foundation and construction method of precast column using the same

The present invention relates to the construction field, and more specifically, when connecting to a pillar supporting a pillar and a pillar produced by a precast method, a connection structure between a precast pillar and a foundation that can increase the convenience of construction and structural safety, and It relates to a construction method of a precast column using this.

In general, the construction PC (Precast Concrete) method is a method of pre-producing the construction pillars, beams, slabs, walls, etc. in a separate place and then assembling and constructing them at the construction site. Since it can be produced in a place that receives less, it is possible to obtain high-quality members economically, and it is possible to reduce the overall construction cost by enabling mechanization of concrete, and it is expected to have an excellent workability and significantly shorten the construction period.

However, the PC method is difficult to firmly connect and join each member, and thus requires technical processing of the joints. In particular, when the PC pillar structure and the PC beam structure are connected, proper technology for connecting and joining them This is necessary, but the connection between the conventional PC column structure and the beam structure is usually installed in the upper part of the PC pillar structure, which is vertically manufactured, with rebars projecting a certain length to the outside, and reinforcing both sides of the PC beam structure, which is manufactured horizontally. After they are buried and installed to protrude a certain length to the outside, the PC beam structure and the PC beam structure are welded to each other or fixed with a regular coupler in a state where one side of the PC beam structure is placed close to the top of the PC column structure. Then, concrete was placed on the connecting portion so that the PC pillar structure and the PC beam structure were connected to each other.

However, in the conventional connection construction, the PC column structure and the PC beam structure must be exactly matched to each other in the reinforcement position of the rebar buried inside the PC beam structure. When the PC beam structure installed on the wall is not level, a large defect occurs in the building, and if the reinforcing bars are randomly bent and connected to each other, the durability and strength of the connecting joint decreases, and the PC pillar structure and the PC beam structure Since the joints are not firmly connected to each other, various defects occur due to condensation caused by temperature changes in summer and winter, shrinkage and expansion due to freezing of water in the crevice, and so on.

On the other hand, as a prior art for connection construction of a PC column structure and a beam structure, in Korean Patent Registration No. 10-1098693, a reinforced concrete frame structure having a beam-column junction where a reinforced concrete column and a reinforced concrete beam are joined, Reinforcing reinforcing bars, which are integrally provided with end plates made of plate members at both ends, are placed so that the end plates are located inside the beams across the inside of the beam-column joints in the direction of beam placement, thereby increasing the strength of the joints and seismic load action. A reinforced concrete frame structure has been disclosed in which a plastic hinge is generated on a beam at an outer position of the end plate to improve the ductility of a reinforced concrete frame structure and to prevent damage to a beam-column joint, thereby significantly improving seismic performance. The technology is simply to reinforce the joint by reinforcement bars placed across the inside of the precast concrete beam-column joint, making the overall strength and durability of the joint weak and placing one end of the beam on the top of the column during construction. There was a problem in that it was difficult to construct as the concrete placement portion was increased due to the construction.

In addition, in connecting the precast column to the foundation, the structural safety of the structure is lowered because the column reinforcement embedded in the column and the foundation reinforcement embedded in the foundation are not integrated, and a separate support structure must be installed and construction should be performed during construction. There has been a problem.

The present invention has been devised to solve the problems of the above-described connection method of the conventional precast pillar and the foundation, and the object of the present invention is to integrate the pillar reinforcement embedded in the precast pillar and the foundation reinforcement embedded in the foundation. It is to provide a connection structure of a precast column and a foundation and a construction method of the precast column using the same.

Another object of the present invention is to provide a method for constructing a connection structure between a precast column and a foundation that can be self-supporting and a precast column using the same, even if a separate support structure is not installed in the process of connecting the precast column and the foundation.

Another object of the present invention is to enable the correction of construction errors that may occur in the connection construction process between the precast pillar and the foundation, and to easily adjust the level of the pillar with respect to the foundation of the precast pillar and foundation. It is to provide a connection structure and a construction method of a precast column using the same.

Another object of the present invention is to facilitate the construction by preventing the filling material from leaking in the use of the rechargeable coupler, and also to use the connection structure of the precast column and the foundation to enable early development of strength for the independence of the column, and using the same It is to provide a construction method of a precast column.

According to an aspect of the present invention, in a connection structure between a pillar including a precast pillar 1 and a foundation 2 and a foundation, the pillar buried reinforcement 100 embedded in the pillar 1; A part of the foundation (2) is embedded, and the upper part (210) of the foundation rebar (200) is exposed; And a connection part 300 for integrating the pillar buried reinforcing bar 100 and the basic buried reinforcing bar 200, wherein the connection part 300 is formed at the end of the pillar 1, and the upper part 210 is It is provided with a connection structure of the pillar and the foundation, characterized in that it includes;

In this case, one surface of the inlet space 310 is opened toward the outside, one end is coupled to the column buried reinforcing bar 100, the other end is a rechargeable coupler 400 exposed to the inlet space 310; further includes Characterized in that it may be a connection structure of the pillar and the foundation.

In addition, one end of the rechargeable coupler 400 is formed with a reinforcing bar coupling portion 410 to which the pillar buried reinforcing bar 100 is coupled, and the other end of the rechargeable coupler 400 is inserted with a reinforcing bar into which the upper portion 210 is inserted. It may be a connection structure of the pillar and the base, characterized in that the space 420 is formed.

In addition, the rechargeable coupler 400 may be a connection structure between a pillar and a base, comprising an injection hole 430 for injecting a filler into the reinforcing bar insertion space 420.

In addition, in the rechargeable coupler 400, a first through hole 410 through which the upper end 210 passes is formed, and the reinforcing bar is inserted while the upper end 210 is inserted into the reinforcing bar insertion space 420. It may be a connection structure of the pillar and the base, characterized in that it further comprises a; closing cap 440 to close the space 420.

In addition, the inner surface of the rechargeable coupler 400 may be a connection structure between the pillar and the base, characterized in that a shear key 450 for integration with the filler injected through the injection port 430 is formed.

In addition, the end member 320 to form the inlet space 310; further comprising, the end member 320, the lower plate spaced a predetermined distance from the lower surface (a) of the base column (1) (321); And a side plate 322 coupled to the lower plate 321, wherein the lower plate 321 has a second through hole 323 through which the upper end 210 passes. It may be the connection structure of the foundation.

In addition, the coupling portion 300 is inserted into the upper end 210 and is located at the lower portion of the lower plate 321, the height adjustment nut having a larger diameter than the diameter of the second through hole 323 (330); It may be a connection structure of the pillar and the base, characterized in that it further comprises.

In addition, the coupling part 300 is inserted into the upper end 210 and coupled with the support structure located at the lower portion of the closing cap 440; a connection structure between the pillar and the foundation further comprising: Can be

In addition, the upper portion 210 is connected to the foundation buried rebar 200, the exposed portion 211 exposed to the upper surface of the foundation (2); Connection reinforcing bar 212 is formed at one end; And a coupler 213 coupling one end of the connecting reinforcing bar 212 and the exposed portion 211; and a connection structure between the pillar and the foundation.

In addition, the pillar (1) is a square, the end member 320 may be a pillar and the connection structure of the foundation, characterized in that installed on the corner of the pillar (1).

According to another aspect of the present invention, in the construction method of the precast column using the connection structure of the pillar and the foundation, the exposed portion 211 of the foundation buried reinforcing bar 200 is introduced into the drawing space 310 A first step (S100) for mounting the pillar (1) on top of the foundation (2); A second step (S200) of adjusting the position of the height adjustment nut 330 to match the level of the pillar 1; Using the coupler 213 to connect one end of the connecting reinforcing bar 212 and the exposed portion 211, the other end of the connecting reinforcing bar 212, the reinforcing bar insertion space of the rechargeable coupler 400 ( 420) is inserted into a third step (S300); A fourth step of injecting the filler into the rebar insertion space 420 through the injection hole 430 (S400); And a fifth step (S500) of installing the formwork on the connecting portion 300 and pouring concrete on-site. The connection structure of the pillar and the foundation is provided.

In this case, the fourth step (S400), closing the reinforcing bar insertion space 420 using the closing cap 440; And injecting the filling material into the reinforcing bar insertion space 420.

According to the present invention, there is an effect capable of integrating a column rebar embedded in a precast column and a foundation bar embedded in a foundation.

According to the present invention, in the process of connecting and constructing the pillars and the foundation, even if a separate supporting structure is not installed, there is an effect of being independent.

According to the present invention, it is possible to correct a construction error that may occur in the connection construction process between the precast pillar and the foundation, and it is possible to easily adjust the level of the pillar with respect to the foundation.

According to the present invention, in the use of the rechargeable coupler, there is an effect that the filling material does not leak, thereby facilitating the construction, and the expression of strength for the independence of the pillars is possible early.

1 is an exploded perspective view of a connection structure between a pillar and a foundation according to an embodiment (Example 1) of the present invention.

Figure 2 is a perspective view of the connection structure of the pillar and the foundation according to an embodiment of the present invention (Example 1).

Figure 3 is a cross-sectional view of the on-site concrete of the connection structure of the pillar and the foundation according to an embodiment (Example 1) of the present invention.

Figure 4 is a side view of the end member according to an embodiment (Example 1) of the present invention.

5 is a plan view of an end member according to an embodiment (Example 1) of the present invention.

6 is a cross-sectional view of a rechargeable coupler according to an embodiment of the present invention (Example 1).

7 is a cross-sectional view of a rechargeable coupler with a cap according to an embodiment of the present invention (Example 1).

8 is an enlarged cross-sectional view of a connection structure between a pillar and a foundation according to an embodiment (Example 1) of the present invention.

9 is an enlarged cross-sectional view of a connection structure between a pillar and a foundation according to another embodiment (Example 2) of the present invention.

10 is a plan view of a connection structure between a pillar and a foundation according to another embodiment (Example 2) of the present invention.

11 is a cross-sectional view of a connection structure between a pillar and a foundation according to another embodiment (Example 3) of the present invention.

12 is an enlarged sectional view of an exploded state of a connection structure between a pillar and a foundation according to another embodiment (Example 3) of the present invention.

13 is an enlarged cross-sectional view of a connection structure between a pillar and a foundation according to another embodiment (Example 3) of the present invention.

Figure 14 is a cross-sectional view of a concrete in-situ state of the connection structure of the pillar and the foundation according to another embodiment (Example 3) of the present invention.

The connection structure of the precast pillar and the foundation according to the present invention and an embodiment of the construction method of the precast pillar using the same will be described in detail with reference to the accompanying drawings, and in describing with reference to the accompanying drawings, the same or corresponding components Will be assigned the same drawing number and redundant description thereof will be omitted.

The embodiments described below are intended to describe some of various application examples of the present invention, and thus the spirit of the present invention is not limited to the configuration of the embodiments.

In addition, terms such as first and second used hereinafter are only identification symbols for distinguishing the same or corresponding components, and the same or corresponding components are limited by terms such as first and second. no.

In addition, the combination does not mean only a case in which a physical contact is directly made between the respective components in a contact relationship between the components, and different components are interposed between the respective components, so that the components are in different components. Use it as a comprehensive concept until each contact is made.

1 to 8 of the accompanying drawings is a view for explaining an embodiment (Example 1) of the present invention, and FIGS. 9 and 10 are drawings for explaining another embodiment (Example 2) of the present invention , FIGS. 11 to 14 are views for explaining another embodiment (Example 3) of the present invention.

* One embodiment (Example 1) of the present invention will be described based on the accompanying drawings.

The present invention relates to a connection structure between a pillar and a foundation including a precast pillar (1) and a foundation (2).

In the conventional connection structure, since the rebars embedded in the pillar 1 and the foundation 2 cannot be integrated, there is a problem in that the structural safety of the structure is lowered and the pillars must be maintained using a separate support structure during construction.

The present invention has the effect of solving this conventional problem by using the structure of the unique connecting portion 300.

Specifically, the connection structure between the pillars and the foundation according to an embodiment of the present invention is embedded in the pillars (1), a part of the pillars (100), and the foundation (2), and a top portion 210 is exposed It includes a reinforcing bar 200 and a connecting portion 300 for integrating the column buried reinforcing bar 100 and the foundation buried reinforcing bar 200 (FIGS. 1 and 3 ).

In this case, the connecting portion 300 is formed at the end of the pillar 1, but includes an inlet space 310 into which the upper portion 210 is introduced.

In the lead-in space 310, a connection part is formed for the integration of the pillar buried reinforcing bar 100 and the foundation buried reinforcing bar 200, and an exposure structure is taken for convenience of construction as will be described later.

That is, one surface of the inlet space 310 is opened toward the outside (FIG. 1).

In addition, in the lower portion of the inlet space 310, the upper end 210 of the foundation buried reinforcing bar 200 is drawn in, and at the upper portion of the inlet space 310, one end of the charging coupler 400 coupled to the column buried reinforcing bar 100. The rebar insertion space 420 is exposed (FIG. 3).

When the upper end 210 of the foundation buried reinforcing bar 300 is inserted into the reinforcing bar inserting space 420, a filler such as concrete is filled into the reinforcing bar inserting space 420. In this case, the pillar buried reinforcing bar 100 and the foundation buried rebar 200 may be integrated.

Accordingly, in performing the construction of the precast column and the foundation, the buried reinforcing bars of each component are connected to form an integral structure, thus forming a separate steel reinforcement structure in the subsequent work such as formwork installation and on-site installation. It does not have the effect of being able to freeze the pillar (1).

Accordingly, it is possible to shorten the construction period, and there is an advantage of reducing the construction cost.

The rechargeable coupler 400 may include an injection hole 430 for injecting a filler into the rebar insertion space 420.

In addition, when the filling material is buffered in the reinforcing bar insertion space 420, an outlet 460 for discharging the filling material therein may be additionally provided.

A shear key 450 may be formed on the inner surface of the rechargeable coupler 400 according to an embodiment of the present invention to increase the integral force with the filler injected through the injection hole 430.

In addition, according to an embodiment of the present invention, the rechargeable coupler 400 is formed with a first through hole 410 through which the upper part 210 passes, while the upper part 210 is inserted into the rebar insertion space 420. A closing cap 440 closing the reinforcing bar insertion space 420 may be further included (FIG. 7).

In this case, it is possible to prevent the lower outflow of the filler, so that it is possible to use a filler with high fluidity, and the convenience of not having to perform a separate capping operation protecting the upper surface of the foundation (2) after the flattening operation is completed. Can be secured.

In order to support the closing cap 440, the coupling portion 300 may be inserted into the upper portion 210 and further include a configuration of the supporting nut 340 positioned below the closing cap 440 (FIG. 7). ).

In the case of the support nut 340, even when the closing cap 440 is omitted, it is possible to obtain an effect of fixing the upper part 210 and the connection part 300 so that the pillar member becomes self-supporting.

According to another embodiment of the present invention (Example 2), a closing cap through hole 441 through which the upper end 210 passes may be formed. In this case, the diameter of the closing cap through-hole 441 is preferably larger than the diameter of the upper end 210.

In this case, the field construction error can be corrected, thereby reducing the difficulty of field construction.

In this case, unlike the first embodiment, since the upper portion 210 is not fixed by the closing cap 440, an inner nut 350 for fixing the upper portion 210 to the closing cap 440 may be further included. That is, by installing the inner nut 350 and the support nut 340 around the finishing cap 440, it is possible that the upper end 210 is fixed to the closing cap 440.

In addition, the connection structure between the precast pillar and the foundation according to another embodiment of the present invention may further include

washers

341 and 351 for increasing the fixing force of the inner nut 350 and the support nut 340.

According to another embodiment of the present invention (Example 3), the rechargeable coupler 400 may be formed on the base 2.

In this case, the end 110 of the column buried reinforcing bar 100 is inserted into the reinforcing bar insertion space 420, and the reinforcing bar 200 buried in the foundation 2 is coupled to the reinforcing bar coupling portion 410.

Other coupling structures correspond to those described in Example 3.

The above-described inlet space 310 of the connection structure between the precast pillar and the foundation according to an embodiment of the present invention may be formed by blocking out the lower end of the pillar 1. However, in order to ensure the work quality and obtain additional effects, the lead-in space 310 in the connection structure between the pillar and the foundation according to an embodiment of the present invention may be formed by the end member 320.

The end member 320 includes a lower plate 321 spaced a predetermined distance from the lower surface a of the pillar 1 and a side plate 322 coupled with the lower plate 321 (FIG. 4, FIG. 5).

In this case, the inlet space 310 having an open shape may be formed in the space between the lower surface (a) of the pillar 1 and the lower plate 321.

In addition, a second through hole 323 through which the upper end 210 passes may be formed in the lower plate 321.

A height adjustment nut 330 inserted and coupled to the upper end 210 may be formed at a lower portion of the lower plate 321. In this case, the diameter of the height adjustment nut 330 is larger than the diameter of the second through hole 323. Accordingly, the verticality of the pillar 1 can be corrected by adjusting the position of the height adjustment nut 330.

That is, when the pillar 1 is formed in a square shape, by forming the end member 320 at the corner, and adjusting the position of the height adjustment nut 330 located at the bottom of the end member 320 to the top or bottom, the pillar ( It is possible to adjust the height of the corner of 1).

Accordingly, it is possible to correct the construction error in the field of the pillar 1 manufactured by the precast method.

The upper part 210 may be integrally formed with the foundation buried reinforcing bar 200.

In addition, the upper end 210 is connected to the foundation buried reinforcing bar 200 and the exposed portion 211 exposed to the upper surface of the foundation 2, one end of the connecting reinforcing bar 212 and the connecting reinforcing bar 212 A coupler 213 coupling the exposed portion 211 may be included in the configuration.

In this case, after the pillar (1) is mounted on the upper portion of the foundation (2), it is possible to integrate the foundation buried reinforcing bar (200) and the pillar buried reinforcing bar (100) using a connecting rebar (212) and a coupler (213). It has an easy effect.

Hereinafter, a construction method of a precast pillar using a connection structure between a pillar and a foundation according to an embodiment of the present invention will be described.

Construction method according to the present invention is a first step of mounting the pillar (1) on the top of the foundation (2) so that the exposed portion 211 of the foundation buried reinforcing bar 200 is introduced into the inlet space 310 of the connecting portion 300 ( S100), the second step of adjusting the position of the height adjustment nut 330 to match the level of the pillar 1 (S200), using the coupler 213, the one end of the connecting rebar 212 and the exposed portion 211 In addition to the connection, the third step (S300) of inserting the other end of the connecting reinforcing bar 212 into the reinforcing bar insertion space 420 of the rechargeable coupler 400, the filling material into the reinforcing bar insertion space 420 through the injection hole 430 It may include a fourth step (S400) for injecting and a fifth step (S500) for installing the formwork on the connection part 300 and pouring concrete on-site.

In this case, the fourth step S400 may include closing the reinforcing bar inserting space 420 using the closing cap 440 and injecting a filler into the reinforcing bar inserting space 420.

The above is merely a description of some of the preferred embodiments that can be implemented by the present invention, and as is well known, the scope of the present invention should not be construed as being limited to the above embodiments, and the present invention described above. It will be said that both the technical idea and the technical idea together with the fundamental are included in the scope of the present invention.

1: Pillar

2: Basic

100: Column rebar

200: foundation reclamation

300: connection

400: rechargeable coupler

Claims

In the connection structure of the pillar and the foundation including the precast pillar (1) and the foundation (2),

A pillar reinforcing bar 100 embedded in the pillar 1;

A part of the foundation (2) is embedded, and the upper part (210) is exposed to the foundation rebar (200); And

Includes; but the connection portion 300 for integrating the pillar buried reinforcing bar 100 and the foundation buried rebar 200;

The connection part 300 is

It is formed at the end of the pillar (1), the inlet space 310, the upper end 210 is introduced; of

Connection structure of the pillar and the foundation, characterized in that it comprises.
According to claim 1,

One surface of the inlet space 310 is opened toward the outside,

One end is coupled to the column buried reinforcing bar 100, the other end is a rechargeable coupler 400 exposed to the inlet space 310;

Connection structure of the pillar and the base, characterized in that it further comprises.
According to claim 2,

One end of the rechargeable coupler 400 is formed with a reinforcing bar coupling portion 410 to which the pillar buried reinforcing bar 100 is coupled,

The other end of the rechargeable coupler 400 has a reinforcing bar insertion space 420 in which the upper end 210 is inserted, characterized in that the column and the connection structure of the foundation.
According to claim 3,

The rechargeable coupler 400,

Connection structure of the pillar and the base, characterized in that it comprises an injection hole (430) for injecting a filling material into the rebar insertion space (420).
According to claim 4,

The rechargeable coupler 400,

The first through hole 410 through which the upper part 210 passes is formed, and the closing cap closing the reinforcing bar inserting space 420 while the upper part 210 is inserted into the reinforcing bar inserting space 420 ( 440);

Connection structure of the pillar and the base, characterized in that it further comprises.
The method of claim 5,

A connection structure between the pillar and the base is formed on an inner surface of the rechargeable coupler 400 for forming a shear key 450 for integration with the filling material injected through the injection hole 430.
According to claim 3,

Further comprising; an end member 320 forming the inlet space 310,

The end member 320,

A lower plate 321 spaced a predetermined distance from the lower surface a of the pillar 1; And

Including, but; the side plate 322 coupled to the lower plate 321,

The lower plate 321 has a second through hole 323 through which the upper portion 210 passes, characterized in that the pillar and the connection structure of the foundation.
The method of claim 7,

The coupling portion 300

The height adjustment nut 330 is inserted into the upper portion 210 and is located at the lower portion of the lower plate 321 and has a larger diameter than the diameter of the second through hole 323;

Connection structure of the pillar and the base, characterized in that it further comprises.
The method of claim 8,

The coupling portion 300

It is inserted into the upper portion 210 and the support nut 340 located at the bottom of the closing cap 440;

Connection structure of the pillar and the base, characterized in that it further comprises.
The method of claim 8,

The upper part 210 is

It is connected to the foundation buried reinforcing bar 200, the exposed portion 211 exposed to the upper surface of the foundation (2);

Connection reinforcing bar 212 is formed at one end; And

A coupler 213 coupling one end of the connecting rebar 212 and the exposed portion 211;

Connection structure of the pillar and the foundation, characterized in that it comprises.
The method of claim 10,

The pillar (1) is prismatic,

The end member 320 is a column and the connection structure of the foundation, characterized in that installed in the corner of the pillar (1).
In the construction method of the precast column using the connection structure of the column of claim 10 and the foundation,

A first step (S100) of mounting the pillar (1) on top of the foundation (2) so that the exposed portion (211) of the foundation buried reinforcing bar (200) is introduced into the introduction space (310);

A second step (S200) of adjusting the position of the height adjustment nut 330 to match the level of the pillar 1;

Using the coupler 213 to connect one end of the connecting reinforcing bar 212 and the exposed portion 211, the other end of the connecting reinforcing bar 212, the reinforcing bar insertion space of the rechargeable coupler 400 ( 420) is inserted into a third step (S300);

A fourth step of injecting the filler into the rebar insertion space 420 through the injection hole 430 (S400); And

A fifth step (S500) of installing a formwork on the connection part 300 and pouring concrete on-site;

Connection structure of the pillar and the foundation, characterized in that it comprises.
The method of claim 12,

The fourth step (S400),

Closing the reinforcing bar insertion space 420 using the closing cap 440; And

Injecting the filler into the reinforcing bar insertion space 420;

Connection structure of the pillar and the foundation, characterized in that it comprises.