KR102524947B1 - A Horizontal connection method of precast concrete panel capable of preventing thermal bridge - Google Patents

Abstract

Disclosed are a connection method using an insulating material and connection details between a precast concrete panel and a building capable of resisting earthquakes and wind loads, wherein the thermal insulation performance of a building that is reduced due to thermal bridges at a horizontal and vertical joint between precast concrete (PC) panels installed using an external insulation method can be improved. The present invention provides a connection method for controlling thermal bridges occurring on a joint of a beam or a slab using a precast concrete panel installed using an external insulation method, wherein the panel contains an insulating material, the upper part of a panel at a first layer and the lower part of a panel at a second layer have a groove formed inside to mount an insulating material, L-shaped ironware is installed to connect the first-layer panel and the second-layer panel, the L-shaped ironware includes a vertical part and a horizontal part, the vertical part includes a sleeve-shaped hole embedded in the panel and inserted into a protrusion mounting bar, the horizontal part includes a hole to be coupled to the upper part of the beam or the slab by bolting, and the insulating material is mounted with the L-shaped ironware installed.

Description

Horizontal connection method of precast concrete panel capable of preventing thermal bridge}

The present invention relates to a precast concrete panel, and more particularly, to a horizontal joining technology of a precast concrete panel.

Among the outer shell structures of buildings, the outer wall of a concrete building is composed of a composite structure consisting of forming a heat insulating layer on the outer surface of the wall and finishing with various exterior materials on the outer surface to realize the insulation performance and beautiful appearance of the building.

In this composite structure, when a concrete wall is formed, an insulating material such as urethane or styrofoam is installed on the outer wall surface, and the outer surface is finished with a tile, stone or metal, such as an aluminum panel, as a finishing material for the final finishing treatment. .

In general, an external insulation system in which insulation is installed outside based on a structure (concrete) is advantageous in terms of insulation performance because it is difficult for cold outside air to flow into the interior compared to an internal insulation system in which insulation is installed inside.

However, the conventional external insulation system has limitations in improving the insulation performance by the structure itself, and the vertical and horizontal connection parts or joints of the external insulation materials, that is, the area where the external insulation materials are laminated, the lower part of the beam or slab, and the horizontal connection area of the external insulation materials There is no countermeasure to prevent the thermal bridge phenomenon that occurs, and furthermore, no countermeasure for earthquake and wind load resistance is prepared.

[Prior patent literature]

- Korean Patent Publication No. 2018-0130973 (published on December 10, 2018)

- Korean Patent Publication No. 2019-0060510 (2019.06.03. Publication)

The present invention relates to a bonding method using a heat insulating material for improving the thermal insulation performance of a building, which is reduced due to a thermal bridge at the horizontal and vertical joints of precast concrete (PC) panels installed by the external insulation method, and the earthquake and wind loads. We would like to present the connection details of the resistive precast concrete panel and the building.

In order to solve the above problems, the present invention is a connection method for controlling the thermal bridge phenomenon occurring at the junction of beams or slabs using a precast concrete panel installed by an external insulation method, wherein the panel is insulated, A groove is formed in the upper part of the first-layer panel and the lower part of the second-layer panel to allow the insulation material to be seated inside, and an L-shaped hardware connecting the first-layer panel and the second-layer panel is installed, and the L-shaped hardware A vertical portion and a horizontal portion are provided, wherein the vertical portion is provided with a hole in the form of a sleeve inserted into a protruding anchoring bar embedded in the panel, and the horizontal portion is provided with a hole that is bolted to the upper portion of the beam or slab. Provided is a method for the insulator to be seated in a state where the L-shaped hardware is installed.

In addition, the outside of the heat insulating material is formed of a plated steel plate except for a portion corresponding to the protruding fixing bar, and the plated steel plate has one surface extended and a protrusion joined to the horizontal portion of the L-shaped hardware. Provides a method characterized in that .

In addition, the insulating material provides a method characterized in that the honeycomb meta-structure is embedded.

In addition, it provides a method characterized in that the gap between the upper part of the panel of the first layer and the lower part of the panel of the second layer is filled with a caulking or grouting method.

In addition, the thermal bridge of the vertical joint structure between the precast concrete panels is blocked by installing a T-bar shaped honeycomb meta structure consisting of a first side part, a second side part and a front part between the precast concrete panels. However, the first side part and part of the front part are fitted into the first groove part having a corresponding shape formed at one end of the first panel, and the second side part and the other part of the front part have a corresponding shape formed at one end of the second panel. It provides a method characterized in that fitted to the second groove of.

In addition, the joint between the first panel and the second panel provides a method characterized in that the gap is filled by a caulking or grouting method.

In addition, on a horizontal cross-section basis, compression reinforcement and tensile reinforcement are respectively placed on the front and rear surfaces of the panel using deformed reinforcing bars or welded wire mesh, and a shear reinforcement connecting the compression reinforcement and tension reinforcement is provided. Provided is a method characterized in that a closed structure is formed by arranging reinforcement in an oblique shape along the side, and a heat insulating material in which the honeycomb meta-structure is embedded is provided inside the closed structure.

In addition, the honeycomb meta-structure provides a method characterized in that honeycomb-shaped cells having a certain width are repeatedly formed on the upper and lower portions, and plates made of waterproof material are attached to the side, top, and bottom surfaces.

According to the present invention, it is possible to prevent thermal bridge through the installation of heat insulators at vertical and horizontal joints of precast concrete panels.

In addition, by controlling the thermal bridge phenomenon, it is possible to maximize the insulation performance of the precast concrete panel and reduce the energy consumption of the building.

In addition, it is possible to improve on-site constructability with a simple construction method.

In addition, resistance to earthquake and wind load can be improved through the complete connection between the beam of the building and the reinforcing member of the precast concrete panel.

Figures 1a and 1b is a view showing the connection details of the external insulation material and the foundation in one embodiment of the present invention.
2 is a view showing the structure of a protruding fixing bar in one embodiment of the present invention.
Figure 3 is a view showing the connection details of the precast concrete panel and the beam or slab in one embodiment of the present invention.
4 is a view showing connection details of the second and third floors of a precast concrete panel according to an embodiment of the present invention.
5 is a view showing connection details of an insulator for thermal bridge control at a junction between precast concrete panels in one embodiment of the present invention.
6 is a view showing results of modeling a precast concrete panel structure according to an embodiment of the present invention and performing heat flow analysis of the modeling.
7a and 7b are views showing vertical bonding between a T-shaped heat insulator and a precast concrete panel for thermal bridge control and a state of grouting or coating after vertical bonding, respectively, in one embodiment of the present invention.
8 is a diagram showing the result of modeling a precast concrete panel structure according to an embodiment of the present invention and performing heat flow analysis of the modeling.
9 is a view showing an insulator structure in which a honeycomb meta-structure is inserted in one embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted. In order to clearly explain the present invention in the drawings, parts irrelevant to the description have been omitted, similar reference numerals have been assigned to similar parts throughout the specification, and detailed configuration directions of the present invention will be described with reference to the drawings. Also, throughout the specification, when a part "includes" a certain component, it means that it may further include other components, not excluding other components, unless otherwise stated.

The present invention is a connection method for controlling a thermal bridge phenomenon occurring at a junction of a beam or slab 140 using a precast concrete panel 100 installed by an external insulation method, wherein the panel 100 is a heat insulating material 170 is inserted, and the upper part of the first layer panel 100 and the lower part of the second layer panel 100 are formed with a groove 160 to allow the insulator 170 to be seated inside, and the first layer panel 100 An L-shaped hardware 130 connecting the second layer panel 100 and the L-shaped hardware is installed, and the L-shaped hardware has a vertical part 131 and a horizontal part 132, but the vertical part is the panel 100 A hole 133 in the form of a sleeve inserted into the protruding anchoring bar 120 embedded in the hole 133 is provided, and the horizontal portion 131 is coupled to the top of the beam or slab 140 by bolting 135 (134). ) is provided, and a method for allowing the insulator 170 to be seated in a state where the L-shaped hardware 130 is installed is disclosed.

First, in the present invention, connection details for controlling the thermal bridging phenomenon occurring at the junction of beams or slabs will be described.

Figures 1a and 1b is a view showing the connection details of the external insulation material and the foundation in one embodiment of the present invention.

Referring to FIG. 1A, the precast concrete panel 100 installed by the external insulation method in the present invention can be connected to the foundation 110 using a splice 111 pre-installed inside or a connector 112 installed outside. there is. The splice 111 pre-installed inside is combined with the reinforcing bar or wire mesh 113 pre-inserted into the foundation 110, and then the precast concrete panel 100 is connected to the foundation 110 through grouting in the splice 111. ) can be fixed.

Referring also to Figure 1b, in the case of using the connection material 112 installed outside the precast concrete panel 100, the connection material 112 and the bolting 115 in the steel plate 114 pre-installed on the foundation 110, or It can be joined by welding (116).

After the precast concrete panel 100 is completely fixed to the foundation 110, on the second floor, the protruding anchoring bar 120, L-shaped hardware 130, and nut 121 embedded in the precast concrete panel 100 Connect to the beam or slab 140 of the structure using (see Fig. 2).

The protruding fixing bar 120 may have a diameter (Φ 1) of 6 to 24 mm, one end of the protruding fixing bar 120 is inside the precast concrete panel 100, and the other end is outside the precast concrete panel 100. As shown in FIG. 2 , the fixing bar 120 protrudes to the outside may have a screw thread 122 to which the nut 121 can be connected.

The details of the L-shaped hardware 130 are calculated by the shear force and moment introduced into the precast concrete panel 100, and the width W1 and thickness T1 of the L-shaped hardware 130 are 30 to 500 mm, respectively. and may be within the range of 5 to 30 mm.

Figure 3 is a view showing the connection details of the precast concrete panel and the beam or slab in one embodiment of the present invention.

Referring to FIG. 3, the vertical portion 131 and the horizontal portion 132 of the L-shaped hardware 130 are provided with holes 133 that are 1 to 2 mm larger than the diameter Φ 1 of the protruding fixing bar 120. , The hole 133 formed in the vertical part is provided in the form of a sleeve, and is connected to the top of the reinforced concrete beam or slab 140 using the anchor bolt 135 to the hole 134 formed in the horizontal part 132. At this time, the protruding fixing bar 120 is connected through the hole 133 formed in the vertical part 131 of the L-shaped hardware 130 using the nut 121, and the hole 133 of the vertical part is formed in the form of a sleeve. This makes it possible to connect the protruding anchoring bar 120 and the beam or slab 140 regardless of the step difference between the beam and the precast concrete panel 100 due to errors in reinforced concrete construction.

4 is a view showing connection details of the second and third floors of a precast concrete panel according to an embodiment of the present invention.

Referring to FIG. 4, the precast concrete panel 100 of the third floor is connected to the reinforcing member 150 protruding from the top of the precast concrete panel 100 of the second floor using a splice 111 pre-installed therein. . The connection method may be applied differently depending on the structural form of the building. That is, when the building is a steel frame (a), the horizontal portion 132 of the L-shaped hardware 130 is welded to the upper portion of the beam, and then the protruding anchoring bar 120 and the vertical portion 131 are connected. If the building is newly built at the same time as the precast concrete panel 100, the half PC beam or slab 140 is the precast concrete panel 100 after the precast concrete panel 100 of the first floor is fixed to the foundation 110 connected to

Here, the L-shaped hardware 130 used for connection is also calculated by the shear force and moment introduced into the precast concrete panel 100, and the width W1 and thickness T1 are 30 to 500 mm and 5 to 30 mm, respectively. It can be within the range of mm.

The horizontal portion 132 of the L-shaped hardware 130 may have a brace in the form of a haunch formed at the lower end to withstand the weight and construction load of the half PC beam or slab 140. After the half PC is placed on the L-shaped hardware horizontal portion 132, the reinforcing bars exposed in the beam or slab 140 may be connected to the L-shaped hardware horizontal portion 132 by welding.

As such, in the present invention, a design capable of resisting earthquake and wind loads can be implemented through a complete connection between the beam or slab 140 of a building and the reinforcing member 150 of the precast concrete panel 100 and the L-shaped hardware 130. can

Meanwhile, after the second and third-layer precast concrete panels 100 are installed, they can be completely fixed through grouting in the splice 111 sleeve.

Grooves 160 are formed in the upper part of the second-layer panel 100 and the lower part of the third-layer panel 100 so that the insulating material 170 is seated and installed on the interface between the layers. The insulator 170 may have a rectangular parallelepiped shape having a width W2 and a depth D2 of 400 to 1,200 mm and 20 to 150 mm, respectively.

5 is a view showing connection details of an insulator for thermal bridge control at a junction between precast concrete panels in one embodiment of the present invention.

Referring to FIG. 5 , the outside of the insulator 170 may be formed of a steel plate 180 having a thickness of 1 to 3 mm coated with zinc, and an extended protrusion 181 may be formed on one side. The protrusion 181 may be welded and fixed to the upper part of the horizontal part 132 of the L-shaped hardware 130. At this time, a plated steel plate is not formed in a portion corresponding to the protruding fixing bar 120 for coupling with the L-shaped hardware 130 .

6 is a view showing results of modeling a precast concrete panel structure according to an embodiment of the present invention and performing heat flow analysis of the modeling.

Referring to FIG. 6, according to the present invention, thermal bridging that may occur between the ceiling of the lower floor and the floor of the upper floor is effectively prevented by blocking the flow of heat using the heat insulating material 170 at the joint of the precast concrete panel 100 between floors. At the same time, it can be seen that it is possible to implement a design with improved resistance to earthquake and wind load through a complete connection between the beam or slab 140 of the building and the reinforcement member of the precast concrete panel 100.

7A and 7B are diagrams illustrating horizontal bonding of a T-shaped heat insulator and a precast concrete panel for thermal bridge control in one embodiment of the present invention, and a state of grouting or coating after horizontal bonding, respectively.

Referring to Figures 7a and 7b, in the present invention, the connection method for controlling the thermal bridge phenomenon occurring at the junction of the beam or slab 140 using the precast concrete panel 100 installed by the above-described external insulation method Together with, the connection details for controlling the thermal bridge phenomenon occurring in the vertical joint of the precast concrete panel 100 are presented.

The vertical bonding between the precast concrete panels 100 uses a T-shaped heat insulating material 190. That is, the thermal bridge blocking of the vertical joint structure between the precast concrete panels 100 is a T-bar type honey composed of the first side part 191, the second side part 192 and the front part 193. The insulator 190 with the comb meta structure inserted is installed between the precast concrete panels 100, but the first side part 191 and part of the front part 193 are one side of the first panel 100 The second part 192 and the other part of the front part 193 are inserted into the first groove part 101 of the corresponding shape formed at the end, and the second part of the corresponding shape formed at one end of the second panel 200 It is inserted into the groove part 201.

As such, in the present invention, the precast concrete panel 100 is provided in a form in which the T-shaped insulator 190 can be inserted in the cross section, and after one row of the precast concrete panel 100 is installed, the T-shaped insulator After inserting 190 on the side of one row of precast concrete panels 100, two rows of precast concrete panels 200 are installed. After that, the gap between the first row and the second row can be filled with a caulking or grouting method.

8 is a diagram showing the result of modeling a precast concrete panel structure according to an embodiment of the present invention and performing heat flow analysis of the modeling.

Referring to FIG. 8, according to the present invention, blocking the flow of heat using the T-shaped insulator 190 at the vertical connection of the mutually precast concrete panels 100 can effectively prevent the thermal bridge that may occur at the connection. confirmed

On the other hand, in the present invention, in the vertical connection structure of precast concrete panels, a structure using a reinforcing material that can secure more safety against earthquake and wind load is proposed.

That is, referring to FIG. 8, in the present invention, on a horizontal cross-section basis, the front and rear portions of the panel 100 are provided with a compression reinforcement 102 and a tension reinforcement 103 using deformed reinforcing bars or welded wire mesh, respectively. , The shear reinforcement 104 connecting the compression reinforcement 102 and the tension reinforcement 103 is placed, but is arranged in an oblique shape along the side of the panel 100 to form a closed structure, and the closed structure A precast concrete panel (100 ) can provide a vertical connection structure.

9 is a view showing an insulator structure in which a honeycomb meta-structure is inserted in one embodiment of the present invention.

Referring to FIG. 9, in the present invention, the honeycomb meta-structure 171 has honeycomb-shaped cells having a certain width (W3) and size (L3) repeatedly formed on the upper and lower sides, and the side, upper and lower surfaces are made of waterproof material. A plate member (not shown) may be attached. As a result, the insulator 170 with the honeycomb meta-structure 171 inside provides a structure that forms closed air inside while securing a nonflammable grade, and in the case of the plate material, laminate or Silmagel material can be applied. In the case of the laminate or Silmagel material, it has a waterproof function to prevent the insulation material from getting wet by water inside the unhardened concrete when placing the insulation concrete, so that the air closed in the honeycomb structure can be prevented from being damaged, and the plate material As a nonflammable grade, damage to the honeycomb structure caused by fire can be minimized.

Above, preferred embodiments of the present invention have been described in detail. The description of the present invention is for illustrative purposes, and those skilled in the art will understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention.

100: precast concrete panel 110: foundation
111: splice 112: connecting material
113: rebar or wire mesh 114: steel plate
115: bolting 116: welding
120: protruding fixing bar 121: nut
122: thread 130: L-shaped hardware
131: vertical part 132: horizontal part
133: vertical hole 134: horizontal hole
135: anchor bolt 140: beam or slab
150: upper protruding reinforcement 160: panel boundary groove
170: Insulator embedded with honeycomb meta structure
171: honeycomb meta structure 180: steel plate
181: protrusion 190: T-type insulation
191: first side portion 191, 192: second side portion
193: front part 101: first groove part
201: second groove 102: compression reinforcement
103: tensile reinforcement 104: shear reinforcement
Φ1: Diameter of protruding fixing bar W1, T1: Width and thickness of L-shaped hardware
W2, D2: width and depth of insulation
W3, L3: width and size of honeycomb meta structure

Claims (8)

As a connection method for controlling the thermal bridge phenomenon occurring at the junction of beams or slabs using precast concrete panels installed by the external insulation method,
The panel is insulated with an insulator,
Grooves are formed in the upper part of the panel of the first layer and the lower part of the panel of the second layer to allow the insulation to be seated inwardly,
An L-shaped hardware connecting the first layer panel and the second layer panel is installed, and the L-shaped hardware has a vertical part and a horizontal part, and the vertical part is inserted into a protruding fixing bar embedded in the panel A hole in the form of a sleeve is provided, and the horizontal portion is provided with a hole to be bolted to the top of the beam or slab,
In a state where the L-shaped hardware is installed, the insulator is seated,
The thermal bridge blocking of the horizontal joint structure between the precast concrete panels is achieved by installing a honeycomb meta structure in the form of a T-bar consisting of a first side, a second side and a front side between the precast concrete panels. ,
The first side portion and a portion of the front portion are fitted into a first groove having a corresponding shape formed at one end of the first panel, and the second side portion and the other portion of the front portion have a corresponding shape formed at one end of the second panel. 2 inserted into the groove,
Based on the horizontal cross section, compression reinforcement and tension reinforcement are reinforced on the front and rear parts of the panel using deformed reinforcing bars or welded wire mesh, respectively,
A shear reinforcing member connecting the compression reinforcing member and the tensile reinforcing member is arranged, and is arranged in an oblique shape along the side of the panel to form a closed structure,
The method of claim 1 , wherein an insulating material in which the honeycomb meta-structure is embedded is provided inside the closed structure. According to claim 1,
The insulator is formed of a plated steel sheet except for a portion corresponding to the protruding fixing bar, wherein the plated steel plate has one surface extended and a protrusion joined to the horizontal portion of the L-shaped hardware. According to claim 1,
The insulating material is characterized in that the honeycomb meta-structure is embedded. According to claim 1,
A method characterized in that the gap between the upper part of the panel of the first layer and the lower part of the panel of the second layer is filled with a caulking or grouting method. delete According to claim 1,
The connection between the first panel and the second panel is characterized in that the gap is filled by a caulking or grouting method. delete According to claim 3,
The honeycomb meta-structure is characterized in that honeycomb-shaped cells having a certain width are repeatedly formed on the upper and lower sides, and plates of waterproof material are attached to the side, upper and lower surfaces.

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