KR102288626B1 - Precast coping having netted support - Google Patents

Abstract

Provided is a precast coping having a reticular support, which prevents a main rebar of a precast coping from being disconnected by a hollow part of a pocket connection part to improve crack safety, simply manufactures and installs a support for mounting the precast coping on a column, prevents damage of concrete by relieving stress concentration of an embedded tip part in which the support and the precast coping are in contact with each other, and can simply dismantle a formwork while reducing the quantity of a permanent formwork forming the pocket connection part. In accordance with an embodiment of the present invention, the precast coping having a hollow part on a column to mount an upper girder of a bridge, comprises: a plurality of wire rods disposed in a direction of a main rebar installed in a precast coping to cross a hollow part; and a load distribution set for distributing a reaction force due to the self-weight of the precast coping by being installed in an embedded tip part in which the wire rods are embedded into a cross section of concrete from the hollow part.

Description

Precast coping having netted support

The present invention relates to a precast coping having a pocket connection part installed on a column, which is a lower structure of a bridge, and, in particular, prevents the main reinforcing bar of the precast coping from being cut due to the hollow part of the pocket connection part, thereby improving crack safety, and improving the crack safety. It simplifies the manufacture and installation of the cradle to mount the cradle to the column, relieves the stress concentration at the buried tip where the cradle and the precast coping meet, prevents damage to the concrete, and reduces the number of permanent forms forming the pocket connection. At the same time, it relates to a precast coping equipped with a mesh cradle that can facilitate dismantling of the formwork.

Coping, one of the substructures of the bridge, is installed on the upper surface of the column to mount the upper girder, and it is advantageous for quality assurance, departing from the traditional construction method of pouring concrete on site after installing the copper bar, formwork and rebar mesh. The application cases of the factory-fabricated precast method, which are quick to construct, are on the rise.

In the conventional construction method using precast coping, the precast coping is mounted in such a way that the upper surface of the column constructed first is inserted through a hollow part formed inside the precast coping, and then a filler such as concrete is poured into the hollow part. There is a procedure for integrating the precast coping and the column. In this precast coping, a hollow part must be formed inside the precast coping to be connected to the column, and due to this hollow part, the main reinforcing bars disposed in the precast coping are inevitably cut off in the hollow part section.

1 is a view showing the internal structural details of the precast coping in a longitudinal cross-sectional view and in a cross-sectional view, respectively, for the manufacturing and mounting steps of the conventional precast coping.

In general, as the precast coping 1 behaves in a “beam” structure with the column 20 as a support point, a tensile stress is generated at the lower edge of the precast coping 1 due to a bending moment. The main reinforcing bar 12 is reinforced. However, in the conventional precast coping (1), as the main reinforcing bar 12 is cut due to the hollow part 3, the tensile resistance performance of the rebar is reduced because it fails to comply with the rebar installation regulations that must secure the anchorage beyond the support point. do. As a result, cracks are generated at the lower edge of the precast coping 1, and cracks are often generated along the interface where the main reinforcing bar 12 is cut and the hollow part 3 meets.

In addition, since the precast coping (1) has a structural feature that the first crack occurs near the precast coping (1)-column 20 interface when a lateral load such as an earthquake is applied, the reinforcing bar at the interface by the break of the main reinforcing bar 12 This ungrounded precast coping 1 is inevitably inevitably deteriorated in structural performance.

On the other hand, in order to mount the precast coping 1 on the pillar, a method of embedding a holder 2 such as an H-beam steel in the hollow part 3 formed inside the precast coping 1 has been recently developed. However, the relatively rigid cradle 2 causes a stress concentration phenomenon at the embedded end of the concrete, and also the reinforcing bars cannot be reinforced, which often causes the concrete to be damaged.

In addition, the cradle 2 has a large cross-section, which requires some manufacturing cost, and since interference with the hollow mold 4 installed to form the hollow part 3 occurs, there is no choice but to damage the hollow mold 4, which increases the cost of the mold. and it is difficult to demold the hollow formwork (4), and workability is poor. In order to solve some of these problems, a method of permanently embedding the entire hollow formwork (4) with steel material was developed in the precast coping (1). As it increases, there is a problem in that economic efficiency is rather reduced.

As the background technology of the present invention, as Korean Patent Registration No. 10-1609758, a 'combination structure of a column and a coping' is proposed. This is structurally efficient by expanding the effective cross-section through the shape of the hollow part of the precast coping, improving structural integrity, preventing the lower part of the coping, and reducing the load on the shear connector. However, in the background art, the break of the main reinforcing bar is inevitably made due to the hollow part, and thus the structural performance is limited.

Korean Patent Registration No. 10-1609758

The present invention is to solve the above problems, and improves crack safety by preventing the main rebar of the precast coping from being cut due to the hollow part of the pocket connection part, and manufacturing and installing a cradle for mounting the precast coping on a column Reducing stress concentration at the buried tip where the cradle and precast coping meet, preventing concrete breakage, reducing the number of permanent forms that form the pocket connection, and providing a mesh cradle for easy dismantling of the formwork An object of the present invention is to provide a precast coping.

According to a suitable embodiment of the present invention, in the precast coping installed with a hollow part on the column to mount the upper girder of the bridge, a plurality of wires arranged in the direction of the main reinforcing bars reinforced in the precast coping and crossing the hollow part, It is characterized in that the wire rod is provided with a mesh cradle including a load distribution set that is installed at the embedded tip part where the wire rod is embedded into the concrete cross section in the hollow part to distribute the reaction force due to the weight of the precast coping.

Here, the wire rod is characterized in that it is composed of any one of reinforcing bars and steel.

In addition, the wire rod is characterized in that it secures an embedded length so that it can be connected to the main reinforcing bar in the precast coping by a welding joint or a double joint.

In addition, when the wire rod is not connected to the main reinforcing bar, it is characterized in that the embedded length is secured more than the fixing length to secure the pulling resistance strength.

In addition, when the wire rod is composed of reinforcing bars, it is characterized in that the wire rod is disposed throughout the precast coping to simultaneously perform the role of the main reinforcing bars.

Here, the load distribution set is characterized in that it is configured to include a load dissipating material, a load transmitting material, and a load distributing material.

In addition, the load dissipating material is installed on the upper surface of the wire rod, characterized in that it is installed at the embedded tip.

In addition, the load transfer member is installed on the upper surface of the wire rod, characterized in that it is installed in the embedded portion so as to be in contact with the load dissipating material side by side.

In addition, the load dissipating material is installed on the outer surface of the load dissipating material and the load transmitting material is characterized in that it is formed larger than the diameter or width of the wire rod.

In addition, the load distributing material is characterized in that it is formed in various shapes such as a semi-circle, a semi-circle combined circle, a plate shape, etc. composed of steel.

In addition, the load transfer material is composed of a material such as FRP, which is lower than the elastic modulus of steel and similar to the elastic modulus of concrete, and is characterized in that it is formed in various shapes such as semi-circular shape, C shape, and plate shape.

In addition, the load dissipating material is composed of an elastic material such as rubber or urethane that is lower than the elastic modulus of concrete, and is characterized in that it is formed in various shapes such as semi-circular, C-shaped, and plate-shaped forms.

In addition, as the shape of the load transmitting material and the load dissipating material is determined according to the shape of the load distributing material, a semi-circular or circular load dissipating material combined with a semi-circular form forms a combination with a semi-circular load dissipating material and a load transmitting material, and a plate-shaped load The dispersing material is characterized in that it forms a combination with a C-shaped, plate-shaped load dissipating material and a load transmitting material.

In addition, the load distribution set is installed on the lower surface as well as the upper surface of the wire rod, characterized in that it is installed in the form of wrapping the wire rod.

In addition, the load distribution set is characterized in that it is coupled to the wire rod through a fixing material such as an iron wire or a hardware.

Here, the mesh holder is based on the first layer in direct contact with the upper surface of the column, characterized in that it is installed so as to be multi-layered in a direction staggered on the first layer.

In addition, it is characterized in that it further includes a band-shaped arrangement frame installed along the perimeter of the hollow portion at the position where the mesh holder is installed.

In addition, the placement frame is characterized in that the groove portion is formed so that the wire rod of the mesh holder penetrates and is installed.

In addition, the arrangement frame is characterized in that it is variously configured in any one of a rectangle and a circle.

According to the present invention, by installing a mesh holder that connects the main reinforcing bars to the hollow formed in the precast coping, the crack safety is improved by preventing the main reinforcing bars from being cut off, and the main member of the mesh holder is made of a mesh by using a wire rod that is easy to order and process. Installation of the cradle makes it easy to manufacture, and since the mesh cradle serves as a cradle to mount the precast coping to the column, and a large number of wire rods distribute and support the load, safety can be secured even if an error occurs during installation. There is an effect that can be done easily.

In addition, by installing a load distribution set at the buried tip where the wire rod of the mesh holder and the precast coping meet, the stress concentration acting on the concrete can be alleviated, thereby preventing concrete damage.

In addition, a belt-shaped arrangement frame is arranged along the periphery of the hollow part at the location where the mesh holder is installed, and a general hollow mold can be installed and dismantled above and below it. And dismantling is simple, and there is no damage to the form because the holder does not penetrate the hollow form, so it has the effect of increasing the recyclability of the hollow form and reducing the quantity.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It should not be construed as being limited.
1 is a view showing the internal structure details of the precast coping in a front view and a plan view, respectively, for the manufacturing and mounting steps of the conventional precast coping.
2 is a view showing the internal structure details of the precast coping in a front view and a plan view, respectively, for the manufacturing and mounting steps of the precast coping according to the present invention.
3 is a perspective view showing a mesh holder according to the present invention.
4 is an exploded-assembly perspective view of a load distribution set according to the present invention.
5A is an exploded-assembled perspective view of another type of load distribution set according to the present invention.
Figure 5b is a perspective view showing another form of the load transmitting material and the load dissipating material according to the present invention.
6A is a view showing the flow of force acting on the load distribution set and the stress distribution acting on the precast coping according to the present invention.
FIG. 6B is a diagram showing the flow of force acting on the load distribution set with respect to the cross section AA of FIG. 6A .
Figure 7a is a perspective view in which the mesh holder is installed on the placement frame according to the present invention.
Figure 7b is a perspective view in which the mesh holder is installed in another type of placement frame according to the present invention.
Figure 8a is a perspective view showing the connection between the reinforcing bar wire and the main rebar in the mesh holder according to the present invention.
Figure 8b is a perspective view showing the joint of each steel wire and the main reinforcing bar in the mesh holder according to the present invention.
9 is a perspective view showing the combination of the wire rod and the load distribution set according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

2 (A) and (B) are views showing the internal structural details of the precast coping in a front view and a plan view, respectively, for the manufacturing and mounting steps of the precast coping according to the present invention, and FIG. 3 is applied to the present invention It is a perspective view showing a mesh cradle that can be used.

2 to 3, the precast coping 10 according to a preferred embodiment according to the present invention is provided with a mesh holder (30). The mesh holder 30 is arranged in the direction of the main reinforcing bars 12 reinforced in the concrete of the precast coping 10, and a plurality of wires 11 crossing the hollow part 3, and the wire rod 11 is the hollow part 3 ) includes a load distribution set (S1, S2) installed in the embedded tip part 13 that is embedded in the concrete cross section.

As such, the mesh holder 30 has a network structure in which a plurality of wire rods 11 are horizontally arranged across the hollow part 3 .

Here, the wire 11 is composed of any one of reinforcing bars and steel.

Such a wire 11 has a constant embedded length La so that it can be connected to the main reinforcing bar 12 and the welded joint or lap joint reinforced in the precast coping 10 . Therefore, the wire 11 is welded or overlapped with the main reinforcing bar 12 through the embedded length La to avoid cutting the main reinforcing bar 12 in the hollow portion 3 section. Therefore, cracking of the precast coping 10 is suppressed and safety is improved.

In addition, it is preferable that the wire 11 has an embedded length La that is greater than or equal to the anchorage length to secure the pull-out resistance strength when it is not connected to the main reinforcing bar 12 . Here, it is preferable that the embedding length (La) is greater than the length of the lap joint because the length of the lap joint is greater than the fixing length and the length of the weld joint according to the design criteria.

In addition, when the wire 11 is composed of reinforcing bars, the wire 11 may be installed throughout the precast coping 10 to simultaneously perform the role of the main reinforcing bars 12 .

The mesh holder 30 is based on the first layer in direct contact with the upper surface of the pillar 20, and may be installed so as to be multi-layered in a staggered direction on the first layer. In FIG. 2 , the mesh holder 30 is installed in multiple layers and is disposed in a mutually perpendicular direction to show a mesh structure.

In the hollow portion 3 formed in the precast coping 10 according to the present invention, a mesh holder 30 connecting the main reinforcing bars 12 is installed, thereby preventing the main reinforcing bars 12 from being cut off, By suppressing cracks in concrete, there is an effect of increasing safety.

In addition, by using the wire 11, which is easy to order and process as the main member of the mesh holder 30, there is an effect of simplifying the manufacture of the mesh holder 30.

In addition, since the mesh holder 30 serves as a holder for mounting the precast coping 10 on the column 20, and a plurality of wire rods 11 distribute and support the load, even if an error occurs during installation, safety is improved. It can be secured and has the effect of simplifying installation.

In addition, since the mesh holder 30 can be installed in multiple layers, even if the weight is increased due to an increase in the size of the precast coping 10, there is an effect that can be easily installed without a separate support.

4 is an exploded-assembled perspective view of a load distribution set according to the present invention, FIG. 5a is an exploded-assembled perspective view of another type of load distribution set according to the present invention, and FIG. 5b is another type of load transfer material according to the present invention and a perspective view showing the load dissipating material.

4 to 5 , the load distribution sets S1 and S2 include the load dissipating materials 110 , 210 , 210a , 210b , the load transmitting materials 111 , 211 , 211a , 211b and the load distribution material 100 . , 200) are included.

Here, the load dissipating materials 110 , 210 , 210a and 210b are installed on the upper surface of the wire 11 , and installed at the embedded tip 13 . The embedded tip portion 13 is a portion in contact with the hollow portion (3).

The load transmitting materials 111, 211, 211a, 211b are installed on the upper surface of the wire 11 and installed in the embedded part so as to be in contact with the load dissipating materials 110, 210, 210a, 210b.

The load dissipating materials 100 and 200 are installed on the outer surfaces of the load dissipating materials 110, 210, 210a, 210b and the load transmitting materials 111, 211, 211a, 211b and are formed to be larger than the diameter or width of the wire 11. do.

Meanwhile, the load distribution set S1 may be installed on the lower surface as well as the upper surface of the wire rod 11 to surround the wire rod 11 .

In addition, the load dissipating materials 110, 210, 210a, 210b and the load transmitting materials 111, 211, 211a, 211b may be manufactured in various shapes, such as a semi-circular shape, a C shape, and a plate shape.

The load spreaders 100 and 200 may be manufactured in various shapes, such as a semi-circle, a circular combination of semi-circular shapes, and a plate shape.

Here, the load dissipating materials 110, 210, 210a, 210b and the load transmitting materials 111, 211, 211a, 211b are selected according to the shape of the load distributing materials 100 and 200, and the load distribution set S1 is a combination thereof. , S2) is constructed.

The semi-circular or semi-circular combination of the load distribution material 100 is combined with the semi-circular load dissipating material 110 and the semi-circular load transmitting material 111 to form the load distribution set S1 .

The plate-shaped load distribution material 200 is combined with the C-shaped load dissipating materials 210 and 210a and the C-shaped load transmitting materials 211 and 211a to form a different type of load distribution set S2.

The plate-shaped load distributing material 200 may be combined with the plate-shaped load dissipating material 210b and the plate-shaped load transmitting material 211b to constitute another type of load distributing set S2.

Here, the load distribution materials 100 and 200 are made of steel.

The load transfer materials 111, 211, 211a, and 211b are made of a material such as FRP, which is lower than the elastic modulus of steel and similar to that of concrete.

The load dissipating materials 110, 210, 210a, and 210b are made of an elastic material such as rubber or urethane that is lower than the elastic modulus of concrete.

Figure 6a is a view showing the flow of force acting on the load distribution set according to the present invention and the stress distribution acting on the precast coping, Figure 6b is the flow of the force acting on the load distribution set with respect to the section AA of Figure 6a It is a drawing showing

Referring to FIG. 6 , as the reaction force R due to the weight of the precast coping 10 acts on the upper surface of the column 20 and is transmitted to the wire 11 of the mesh holder 30 , the wire rod 11 ) is subjected to the shear force under the design-dominant load.

When the wire rod 11 is independently used without reinforcement at the embedded tip 13, the precast coping 10 made of concrete, which has lower strength and rigidity compared to the wire 11 made of steel, has the shear force at the embedded tip 13. As a result, local damage may occur, causing structural problems such as crushing beyond cracks and some concrete falling off.

According to the present invention, as the load dissipating materials 110, 210, 210a, and 210b are provided on the wire 11 at the embedded tip 13, the shear force acting on the wire 11 is the load dissipating material 110, 210, 210a. , 210b) is mostly not transmitted to the embedded tip part 13 due to the elastic deformation.

In order to secure the elastic deformation performance of these load dissipating materials 110, 210, 210a, and 210b, the load dissipating materials 110, 210, 210a, 210b are composed of elastic materials such as rubber and urethane that are lower than the elastic modulus of concrete. desirable.

The shear force acting on the wire 11 is not transmitted to the embedded tip 13, whereas the load dissipating material 110, 210, 210a, 210b is soft to the load transfer material 111, 211, 211a, 211b through the load distribution material ( 100 and 200), and the load distributing materials 100 and 200 are configured to have a cross section larger than the diameter or width of the wire 11, and are transmitted so that the shear force is widely distributed inside the precast coping 10.

Here, the load transfer members 111 , 211 , 211a and 211b are intermediate members for transmitting the shear force acting on the wire rod 11 to the load distribution materials 100 and 200 , and when the elastic modulus is small, the large elastic modulus of the wire rod 11 . By inducing deformation, it is possible to exceed the elastic deformation limit that the load dissipating materials 110, 210, 210a, 210b can handle, thereby causing stress concentration in the buried tip 13, and when the elastic modulus is large, the load transfer material ( 111, 211, 211a, 211b) and inwardly adjacent concrete cross-section may induce stress concentration, so the load-transmitting materials 111, 211, 211a, 211b are lower than the elastic modulus of steel and are made of FRP, which is similar to that of concrete. It is preferable to be made of a material.

According to the present invention, the load distribution sets S1 and S2 are provided at the embedded tip 13 where the wire 11 of the mesh holder 30 and the precast coping 10 meet, so that the stress concentration acting on the concrete can be relieved. It has the effect of preventing the breakage of concrete.

Figure 7a is a perspective view in which the mesh holder is installed in the placement frame according to the present invention, Figure 7b is a perspective view in which the mesh holder is installed in another type of placement frame according to the present invention.

Referring to FIG. 7 , a belt-shaped arrangement frame 300 installed along the periphery of the hollow part 3 at a position where the mesh holder 30 is installed may be configured.

The placement frame 300 is provided with a groove portion 301 so that the wire 11 of the mesh holder 30 is installed therethrough.

In addition, the arrangement frame 300 may be configured in various shapes in any one of a rectangle and a circle.

By the present invention, a band-shaped arrangement frame 300 is provided along the periphery of the hollow part 3 at the position where the mesh holder 30 is installed, so that the general hollow mold 4 is installed and dismantled above and below it. There is an effect of simplifying the installation and dismantling of the hollow formwork (4) because the mesh holder 30 does not interfere with the conventional hollow formwork (4).

In addition, due to the placement frame 300, the mesh holder 30 does not penetrate the hollow formwork 4, so the conventional holder 2 damages the hollow formwork 4, whereas the mesh holder 30 is a hollow formwork ( 4) is not damaged, so it has the effect of increasing the recyclability of the hollow formwork (4) and reducing the quantity.

Figure 8a is a perspective view showing the connection between the reinforcing bar wire and the main reinforcing bar in the mesh holder according to the present invention, and Figure 8b is a perspective view showing the connection between each steel wire and the main reinforcing bar in the mesh holder according to the present invention.

Referring to FIG. 8A, when a reinforcing bar is applied as the wire 11, various combinations of the load distribution sets S1 and S2 are possible, such as a semi-circle, a semi-circular combined circle, a plate shape, and the like, and the wire 11 is a main reinforcing bar ( 12) can be connected in a variety of ways, such as welded joints, lap joints, etc.

In addition, the wire 11 may extend throughout the precast coping 10 to simultaneously perform the role of the main reinforcing bar 12 .

Referring to FIG. 8B , when a square member is applied as the wire rod 11 , the load distribution set S2 is combined with a plate shape, and the wire rod 11 may be connected to the main reinforcing bar 12 by a welding joint method.

9 is a perspective view showing the combination of the wire rod and the load distribution set according to the present invention.

Referring to FIG. 9 , the load distribution sets S1 and S2 are coupled to the wire 11 through the fixing members 400 , 401 , 402 such as an iron wire or a hardware.

There is an effect of stably manufacturing the precast coping 10 by preventing the load distribution sets S1 and S2 from being lost during concrete pouring through the fixing materials 400, 401, and 402 having such a simple configuration.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but only by the claims appended hereto.

3: hollow
10: precast coping
11: wire rod
20: pillar
30: net cradle
S1, S2: load distribution set
110,210: load dissipation material
111,211: load transfer material
100,200: load distribution material
300: placement frame
400,401,402: fixing material

Claims (19)

In the precast coping 10 installed with a hollow part 3 on the column 20 to mount the upper girder of the bridge,
A plurality of wire rods 11 arranged in the direction of the main reinforcing bars 12 reinforced in the precast coping 10 and crossing the hollow part 3, and the wire rod 11 are embedded in the concrete cross section in the hollow part 3 Reticulated cradle, characterized in that it is installed on the front end (13) and provided with a mesh holder (30) including a load distribution set (S1 or S2) for dispersing the reaction force (R) due to the self-weight of the precast coping (10) Equipped with precast copings. The method of claim 1,
The wire 11 is a precast coping with a mesh holder, characterized in that it is composed of any one of reinforcing bars and steel. The method of claim 1,
The wire 11 is a precast coping with a mesh holder, characterized in that it secures an embedded length (La) so that it can be connected to the main reinforcing bars and welded joints or lap joints in the precast coping (10). The method of claim 1,
The wire 11 is precast coping provided with a mesh holder, characterized in that it secures an embedded length (La) equal to or greater than the anchoring length to ensure pull-out resistance strength when not connected to the main reinforcing bar. The method of claim 1,
When the wire 11 is composed of reinforcing bars, the precast coping with a mesh holder, characterized in that the wire 11 is disposed throughout the precast coping 10 so as to simultaneously perform the role of the main reinforcing bars. The method of claim 1,
The load distribution set (S1, S2) is a precast coping with a mesh cradle, characterized in that it comprises a load dissipating material (110, 210), a load transmitting material (111, 211), and a load distributing material (100, 200). 7. The method of claim 6,
The load dissipating materials (110, 210) are installed on the upper surface of the wire rod (11), precast coping provided with a mesh holder, characterized in that it is installed on the embedded tip (13). 7. The method of claim 6,
The load transfer materials (111, 211) are installed on the upper surface of the wire rod (11), the load dissipating material (110, 210) precast coping provided with a mesh holder, characterized in that it is installed in the embedded portion so as to be in contact with each other. 7. The method of claim 6,
The load dissipating materials 100 and 200 are installed on the outer surfaces of the load dissipating materials 110 and 210 and the load transmitting materials 111 and 211, and are formed to be larger than the diameter or width of the wire 11. Precast coping provided with a mesh holder. 7. The method of claim 6,
The load distributing materials 100 and 200 are precast copings with a mesh holder, characterized in that they are formed in various shapes such as semi-circle, semi-circular combined circle, plate shape, etc. composed of steel. 7. The method of claim 6,
The load transfer materials 111 and 211 are made of a material such as FRP, which is lower than the elastic modulus of steel and similar to the elastic modulus of concrete, but is formed in various shapes such as semi-circular, C-shaped, and plate-shaped precast copings equipped with a mesh holder. 7. The method of claim 6,
The load dissipating materials 110 and 210 are made of elastic materials such as rubber and urethane, which are lower than the elastic modulus of concrete, and are formed in various shapes such as semi-circular, C-shaped, and plate-shaped precast copings equipped with a mesh holder. 7. The method of claim 6,
As the shapes of the load transfer materials 111 and 211 and the load dissipators 110 and 210 are determined according to the shape of the load dissipators 100 and 200, the semi-circular or semi-circular combined circular load dissipators 100 and 200 are semi-circular load dissipators 110 and 210 ) and the load transfer materials 111 and 211, and the plate-shaped load distribution materials 100 and 200 are provided with a C-shaped, plate-shaped load dissipating material 110 and 210 and the load transfer materials 111 and 211. precast coping. The method of claim 1,
The load distribution sets (S1, S2) are installed on the lower surface as well as the upper surface of the wire rod 11 to surround the wire rod 11. Precast coping with a mesh holder, characterized in that it is installed. The method of claim 1,
The load distribution sets (S1, S2) are precast copings provided with a mesh cradle, characterized in that they are coupled to the wire rod 11 through fixing materials 400, 401, 402 such as iron wire or hardware. The method of claim 1,
The mesh holder 30 is based on the first layer in direct contact with the upper surface of the column 20, precast coping with a mesh holder, characterized in that it is installed so as to be multi-layered in a staggered direction on the first layer. The method of claim 1,
Precast coping with a mesh holder, characterized in that it further includes a band-shaped arrangement frame 300 installed along the periphery of the hollow part 3 at the position where the mesh holder 30 is installed. 18. The method of claim 17,
Placement frame 300 is precast coping provided with a mesh holder, characterized in that the groove portion 301 is formed so that the wire 11 of the mesh holder 30 is installed therethrough. The method of claim 1,
Placing frame 300 is a precast coping equipped with a mesh holder, characterized in that it is variously configured in any one of a rectangle and a circle.

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