KR20210128110A - Precast slab using 2-way grid reinforcing member and structure construction method using the same - Google Patents

Abstract

Disclosed are a precast slab using a two-way grid structure which can reduce the weight thereof by using a grid reinforcing member capable of securing two-way (longitudinal and lateral) bending rigidity and shearing force with a hollow space, secure structural performance, and secure constructability by facilitating installation on a column structure and a beam member, and a structure construction method using the same. The precast slab using a two-way grid structure comprises: a precast lower plate including a tendon accommodation block accommodating a tendon therein and protruding from a horizontal plate; and a grid structure integrated with the upper surface of the tendon accommodation block by using a shear connector, forming square pipes in a grid shape to allow the internal space of the square pipes to play the role of a hollow space (S1), and resisting against the shearing force in a beam member connection portion and the bending rigidity in two directions including a longitudinal direction and a lateral direction together.

Description

A precast slab using a two-way grid-type structure and a structure construction method using the same

The present invention relates to a precast slab using a two-way grid-type structure and a structure construction method using the same. More specifically, a two-way grid type that can secure structural performance while reducing its own weight by using a two-way grid-type structure that can secure bending stiffness and shear force in two directions (longitudinal and transverse directions) together with the hollow part S1 It relates to a precast slab using a structure and a structure construction method using the same.

1a and 1b show a structural cross-sectional view and a construction example of a conventional precast slab.

First, according to FIG. 1A, in particular, in the construction of a distribution warehouse, in a state in which the beam member 20 is constructed between the column structures 10, the precast slab 30 is lifted and the precast slab 30 is lifted between the beam members 20. It can be seen that the cast slab 30 is connected and installed.

The precast slab 30 is manufactured to have a size and weight that can be lifted by a tower crane, etc., and the longitudinal extension length is relatively small compared to the lateral extension length (L), and is a reinforced concrete plate member formed with a constant thickness. is made

Therefore, the precast slab 30 makes it possible to lighten the weight (self-weight) as much as possible to secure workability and workability, and to extend the lateral extension length (L) with the same weight (self-weight). It is possible to reduce the number of installations of the structure and the beam member.

Therefore, the precast slab 30 technology has been developed in such a way that the weight (self-weight) is reduced as much as possible in the range that can be transported and constructed while simplifying the manufacturing process.

Figure 1b is two examples of the conventional precast slab 30 widely used in Korea, and a cross-sectional view, a connection diagram with a beam member, and a longitudinal connection portion are shown.

First, as a rib plus slab 40 in FIG. 1b , it is made of a reinforced concrete plate member, and is composed of a lower flange, an abdomen and an upper flange, and an EPS block is embedded in the abdomen to reduce self-weight, the abdomen It can be seen that a plurality of vertical ribs are formed to be spaced apart from each other.

In the longitudinal direction, the inner reinforcing bars are arranged so that they extend in the transverse direction inside the upper and lower flanges, and the shear reinforcing bars are drawn out from the upper surface for synthesis when the topping concrete is poured.

At this time, since the rib plus slab reduces its own weight by using the EPS block 41, concrete is poured in advance to a production form (not shown) to a certain thickness in order to prevent buoyancy. As the concrete pouring method is used to manufacture the concrete, the concrete pouring process is divided, so there is a problem that it takes a lot of money and time for the production period and curing quality control.

In addition, the internal reinforcing bars are reinforced in the transverse direction in the extension length direction of the rib plus slab, and the internal reinforcing bars can also be reinforced in the longitudinal direction in the orthogonal direction.

It has no choice but to design and manufacture it as a one-way slab in the transverse direction (a slab equipped with a moment of resistance to the applied load in the lateral direction) that optimizes its own weight by minimizing the amount of actual internal and shear reinforcement, so basically structural performance was limited, and it can be said that structural performance was somewhat sacrificed for manufacturing and constructability.

Next, as the hollow core slab 50 in FIG. 1b, it can be seen that it is also a reinforced concrete plate member and is composed of a lower flange, an abdomen and an upper flange, and an oval hollow part 51 in the abdomen to reduce its own weight It can be seen that is formed.

Also in the longitudinal direction, inside the upper and lower flanges, internal reinforcing bars are reinforced to extend in the transverse direction, and unlike the rib plus slab 40, the shear reinforcing bars are not produced to be drawn out from the upper surface, but are produced to resist the shear force itself.

Since this hollow core slab uses the hollow part 51, which is an empty space for its own weight, it does not use EPS blocks, so it is possible to solve the problem of complicated work by concrete split casting, and it is effective in reducing its own weight,

There was a limitation in that it was not easy to secure manufacturing efficiency because a hollow tube or separate manufacturing equipment was used to secure the hollow part 51 .

In addition, the internal reinforcement is also reinforced in the transverse direction in the longitudinal direction of the hollow core slab 50, and the internal reinforcement may also be reinforced in the longitudinal direction of the orthogonal direction. Since it is designed and manufactured as a slab having a moment of resistance to load), there is a problem in that the structural performance is limited, which is the same as that of the rib plus slab 40 .

The rib plus slab 40 and the hollow core slab 50 are connected to the beam member 52 so that the connecting reinforcing bars are drawn out from the beam, and the connecting reinforcing bars and shear reinforcing bars of the slabs are synthesized while pouring the topping concrete. It can be seen that the method is used, and the longitudinal connection of the slabs uses a method in which the side grooves are filled with topping concrete. can

Figure 1c shows a bending moment diagram of the conventional hollow concrete slab (60).

That is, the hollow concrete slab 60 forms a hollow part to reduce its own weight. This hollow part is a hollow part that sets an EPS block inside the form, and reduces its own weight by excluding concrete pouring as much as the volume occupied by the EPS block. It can be seen that the hollow part 61 can be formed by the square pipe 70 by installing the 70 .

Accordingly, since the square pipe 70 is disposed to be buried in the longitudinal direction of the hollow concrete slab 60 to form a hollow part, there is a limitation that it is not for an active action for improving structural performance, and the hollow concrete slab 60 inside It can be seen that there is a limit that cannot otherwise contribute to securing the integrity of the otherwise adjacent hollow concrete slab 60 by simply being buried in the .

Republic of Korea Patent No. 10-1875043 (Title of the invention: Pre-tension hollow concrete slab using square pipe, publication date: July 06, 2018)

Accordingly, the present invention allows the hollow part (S1) to be formed without an EPS block inside, and to ensure flexural rigidity that can effectively resist loads in the longitudinal and lateral directions (two directions) acting. It is a technical task to solve the provision of a precast slab using a two-way grid-type structure that is effective for , shear resistance and minimizes self-weight and a method for constructing a structure using the same.

In addition, the present invention can minimize the amount of internal reinforcement, and can have the convenience of manufacturing by allowing the concrete pouring process to be performed once during manufacturing, and the final floor plate structural efficiency by combining the panel for floor plate formwork and topping concrete It is a technical task to solve the provision of a precast slab using a two-way lattice-type structure that can secure and constructability and a method for constructing a structure using the same.

In addition, the precast slab using the two-way lattice structure is integrated with the topping concrete at the connection part with the beam member to contribute to the simple construction, so that the composite performance with the beam member can be sufficiently secured. It is a technical task to solve the provision of a precast slab using a grid-type structure and a method for constructing a structure using the same.

In order to achieve the above object, a precast slab using a two-way grid-type structure of the present invention and a structure construction method using the same include: a precast lower plate including a tension member receiving block in which a tension member is accommodated inside a protruding horizontal plate; As one integrated using a shear connector on the upper surface of the tension member accommodating block, the square tube is formed in a grid shape so that the inner space of the square tube serves as a hollow part (S1), but in two directions including the longitudinal and lateral directions It includes; a lattice-type structure that can resist both bending stiffness and shear force at the connection portion with the beam member.

The precast slab using the two-way grid-type structure of the present invention uses a two-way grid-type structure in which a square tube is formed in a grid shape and a lower concrete plate, and the two-way load acting on the precast slab in the longitudinal and transverse directions. By making it possible to directly resist the bending moment caused by be able to solve the problem.

In addition, the precast slab using the two-way lattice-type structure is one in which the grid-type structure is integrated with the lower concrete plate, and the lower flange is used to introduce the prestress by installing the tension member in the longitudinal and transverse direction. The thickness of the structure can be minimized, and the lattice-type structure is integrated and exposed on the upper surface of the lower concrete plate so that both ends are supported between the beam members at the site, and then the topping concrete is poured separately to complete the slab of the final structure. Therefore, constructability can be secured.

In addition, the grid-type structure of the precast slab using the two-way grid-type structure effectively resists bending resistance in two directions together with the tension member, and the square tube constituting the grid-type structure also resists shear resistance in two directions, Structural performance can be sufficiently secured by attaching additional reinforcing materials (to secure shear and flexural rigidity) to the side to reinforce shear resistance.

In addition, the precast slab using the two-way grid-type structure is integrated with each other by pouring the connecting part concrete together with the combination of the topping concrete at the longitudinal connection part of the grid-type structure of the precast slab using the two-way grid-type structure, and the longitudinal connection It is possible to ensure that the topping concrete can be poured not only in the area but also in the space between the lattice-type structures, so that the structural integrity can be sufficiently secured.

1a and 1b are a structural cross-sectional view and a construction example of a conventional precast slab;
Figure 1c is a bending moment diagram of a conventional hollow concrete slab
2a, 2b, 2c and 2d are a configuration perspective view and a construction cross-sectional view of a precast slab using the two-way grid-type structure of the present invention;
3 is a connection construction diagram of a precast slab and a beam member using the two-way grid-type structure of the present invention;
4a and 4b are diagrams showing the construction of a structure using a precast slab using the two-way grid-type structure of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

[Precast slab 100 using the two-way grid-type structure of the present invention]

2a, 2b, 2c, and 2d show a perspective view and a construction cross-sectional view of the precast slab 100 using the two-way grid-type structure of the present invention.

2A and 2B, the precast slab 100 using the two-way grid-type structure of the present invention is a two-way grid-type structure 130 integrally formed on the upper surface of the precast lower plate 110. The two-way grid-type structure 130 is formed by forming the square tube 131 in a grid shape, and the inner space of the square tube serves as the hollow part S1 of the precast slab 100 using the two-way grid-type structure.

The precast lower plate 110 uses a tension member 112 to introduce prestress to minimize its thickness by minimizing its own weight,

By integrating the two-way grid-type structure 130 on the upper surface of the precast lower plate 110, it effectively resists the load acting in two directions (longitudinal and transverse directions) and effectively resists the generated shear force (shear resistance). Referring to FIGS. 2c and 2d, a reinforcing plate 132 is further attached to the two-way grid-type structure 130 to further secure the flexural rigidity while allowing it to be used.

Therefore, referring to FIG. 2c on the upper surface of the two-way grid-type structure 130, the final floor plate 330 can be constructed by pouring the topping concrete 150 without installing or not installing the panel 151 for the floor plate formwork. will make it

In addition, the topping concrete 150 is poured so as to contribute to the integration by the longitudinal connection of the precast slab 100 using the two-way grid-type structure and the synthesis with the beam member 200 .

Accordingly, the precast slab 100 using the two-way grid-type structure of the present invention is as shown in FIGS. 2a, 2b, 2c and 2d, the precast lower plate 110, the two-way grid-type structure 130, the topping concrete (150).

First, the precast lower plate 110 is a precast concrete plate made of reinforced concrete to a certain thickness, as shown in FIGS. 2A and 2B , and a beam member 200 and a beam member 200 installed between the column structures 300 . ), the two-way grid-type structure 130 is integrated on the upper surface while functioning as a support plate at both ends when installed so that the ends of the precast slab 100 using the two-way grid-type structure are supported between them, and the topping concrete 140 It also functions as a mold for

This precast lower plate 110 is made of prestressed reinforced concrete, and the thickness of the precast slab 100 using the two-way lattice structure must be minimized to reduce the self-weight of the precast slab 100, so the present invention particularly provides a tension member 112 ) is used to introduce pre-stress, thereby contributing to the reduction of self-weight.

At this time, in order to secure the installation position of the tension member 112 on the horizontal plate 111, the tension member 112 is formed on the upper surface of the horizontal plate 111 for this purpose, and the tension member receiving block protruding from the top surface of the horizontal plate 111 ( 113), as shown in FIGS. 2A and 2B, is formed.

Accordingly, the tension material accommodating block 113 accommodates the tension material 112 therein, and serves as a site where the two-way grid-type structure 130 to be described later is stably seated on the upper surface, and the tension material accommodating block 113 is It is formed to extend continuously in the transverse direction, and also serves to reinforce the horizontal plate 111, which is a relatively thin plate.

This precast lower plate 110 has a relatively thin thickness, so it can be produced by pouring concrete once in the formwork without pouring concrete more than twice, so it is excellent in manufacturability, and the tension member accommodating block 113 is formed of vertical ribs. Since it is not necessary to make it possible, the operation of the production form becomes economical as well.

The precast lower plate 110 is formed to extend in the longitudinal direction while having a transverse extension length L, and is installed to be mounted on the beam member 200 in the transverse direction in a rectangular shape.

Next, as shown in FIGS. 2A and 2B, the two-way lattice-type structure 130 is integrated and synthesized using a shear connector 133 on the upper surface of the tension member receiving block 113 of the precast lower plate 110, It is formed to be exposed on the upper surface of the cast lower plate 110 and basically serves to form the hollow portion S1 without using an EPS block unlike in the prior art.

That is, the square tube 131 is installed to cross each other on the same plane in a grid form in the longitudinal and lateral directions, as shown in FIGS. 2A and 2B , but the square tube 131 is connected to the beam member 200. It is arranged to extend toward the beam member 200 on the upper surface of the precast lower plate 110 .

At this time, the reason for using the square tube 131 is that a ready-made product can be used and it is relatively easy to process, and since the inside is an empty space, it can act as the hollow part S1, and even if the two-way grid-type structure 130 is used, it can be used in two directions. Precast slab using a two-way grid structure ( This is because it can serve to form a hollow part while minimizing the thickness of 100).

At this time, the topping concrete 150 can be filled between the square pipe 131 and the square pipe 131 and the connection part with the beam member 200, so that the beam member 200 and the connection part support rigidity can be secured. to be made available as

Referring to FIG. 2c , a plurality of shear connectors 133 are formed in the square tube 131 for integration between the precast lower plate 110 and the topping concrete 150 .

That is, the shear connecting material 133 is formed to extend downward in a plurality of the lower surface of the square tube 131 through integration with the precast lower plate 110 to be embedded in the precast lower plate 110,

It can be seen that it is formed to extend from the upper surface and the side for integration with the topping concrete 150 to be poured, and is buried in the topping concrete 150 .

Furthermore, the square tube 131 is integrated into the upper surface of the precast lower plate 110 in a grid shape, so that it effectively resists the load acting in two directions (longitudinal and transverse directions) together with the precast lower plate 110 while effectively resisting the shear force and bending. It can be seen that the lattice type is formed to effectively resist the moment.

In particular, as shown in FIG. 2D , the reinforcing plate 132 is further attached to the two-way grid-type structure 130 .

That is, the thickness of the square tube 131 is determined when a ready-made product is used. If a large number of the shear connector 133 that is spot-welded is used, the square tube 131 may be affected, and there is no other means for reinforcing the rigidity. For this reason, the strip-shaped steel plate is additionally attached to the square pipe 131 in the portion where the bending moment and shear force are the greatest, by welding or the like.

In particular, since the exposed end of the square tube 131 extends to the connecting portion with the beam member 200, a shear force may be greatly generated, and the intermediate portion between the ends of the square tube 131 has a large bending moment, so the reinforcing plate ( Although referred to as 132), the reinforcing plate 132 is installed to reinforce the bending rigidity and shear force of the square pipe 131 .

That is, when the precast slab 100 using the two-way grid-type structure is installed so that both ends are supported on the beam member 200, as shown in FIG. 2D, the precast slab 100 using the two-way grid-type structure is schematic. In the central part, the bending moment is greatest in the longitudinal and transverse directions.

Basically, the two-way grid-type structure 130 integrated with the precast lower plate 110 resists this, and the reinforcement plate 132a is attached to the upper surface of the square tube 131 in the central part to secure bending rigidity, and the beam Since the largest shear force is generated at both ends supported by the member 200 , the reinforcing plate 132b is attached to the side surface rather than the upper surface of the square tube 131 to effectively resist the shear force.

Furthermore, according to FIG. 2D , it can be seen that the reinforcing plate 132a on the surface of the square tube 131 can be formed in multiple layers with different thicknesses or the same thickness in a limited area, not shown, but The reinforcing plate 132 may be formed in various forms, such as a vertical plate, a channel member, etc., rather than a horizontal plate shape.

Next, the topping concrete 150 is shown in FIGS. 2a, 2b, 2c and 3 . After the both ends of the two-way grid-type structure 130 integrated with the precast lower plate 110 are installed to be supported by the beam member 200, the precast lower plate 110 is used as a mold, and referring to FIG. 2C, the reinforcing bar assembly 152 ) as a base plate reinforcing bar, it is poured to a certain thickness to construct a base plate.

At this time, the topping concrete 150 may be filled in the space between the square tubes 131 constituting the two-way grid-type structure 130 , or may not be filled in the space between the square tubes 131 .

At this time, in the transverse connection portion of the precast slab 100 using the two-way grid-type structure and the precast slab 100 using the two-way grid-type structure, the precast lower plate 110, the end faces of which are in contact with each other, is connected in the transverse direction. As a formwork, the topping concrete 150 is basically poured in the transverse connection part, but

It can be prevented from being poured between the square pipes 131. For this, referring to FIG. 2c, the bottom plate formwork panel 151 (a kind of horizontal finishing plate) is installed between the upper surfaces of the square pipes 131 to be supported, and then topping Concrete 150 is poured.

Furthermore, when it is necessary to fill the topping concrete 150 between the transverse connection part of the precast slab 100 using the two-way grid-type structure and the square pipe 131, the panel for the bottom plate formwork 151 It is enough to pour the topping concrete 150 without using.

This is, for example, the portion where the beam member 200 and the precast slab 100 using the two-way lattice structure are connected to each other, the topping concrete 150 is poured into the space between the square pipes 131 to secure the connection rigidity and is filled. make it possible,

Since the bending moment is the largest between both ends of the precast slab 100 using the two-way grid-type structure, the topping concrete 150 is not filled between the square pipes 131. You can use it.

It can be seen that, as shown in FIG. 2c , a panel support channel 134 may be further formed in the corner portion of the square pipe 131 for installation of the panel 151 for the bottom plate formwork.

The panel support channel 134 is formed as a L-shaped member at the corner of the square tube 131, as shown in FIG. 2c, and supports the panel 151 for the bottom plate formwork on the upper surface, so that it is advantageous for the installation and dismantling of the demolding light. do.

The topping concrete 150 is poured to a certain thickness while allowing the two-way grid-type structure 130 to be buried. It is preferable to arrange the work more conveniently by using a wire mesh or the like.

[Connection of the precast slab 100 and the beam member 200 using the two-way grid-type structure of the present invention]

3 is a diagram illustrating a connection configuration between the precast slab 100 and the beam member 200 using the two-way grid-type structure of the present invention as described above.

That is, in the beam member 200, the column structure 300 is vertically constructed in a precast method on the base plate 310 after the construction of the base plate like a distribution warehouse, and the floor plate 330 corresponding to each floor is installed. A beam member 200 is installed between the upper ends of the column structure 300 for construction.

Such a beam member 200 can be formed in a cross-section such as a square sphere, etc. In the present invention, a precast reinforced concrete beam having a rectangular parallelepiped shape as shown in FIG. .

The beam member 200 is formed to extend in the longitudinal direction, and along the side of the upper surface of the cuboid body 220 of the beam member 200, a precast slab 100 using the two-way grid-type structure of the present invention as described above. It can be seen that both ends of the are supported so that they are connected and installed in the longitudinal direction.

Accordingly, the upper surface of the rectangular parallelepiped body 220 of the beam member 200, the upper surface of the precast lower plate 110 of the precast slab 100 using the two-way grid-type structure, and the square tube 131 of the two-way grid-type structure 130 As the topping concrete 150 is poured in the space between, the beam member 200 and the precast slab 100 using the two-way lattice structure are integrated and synthesized with each other,

It can be seen that the bottom plate 330 is finally constructed by reinforcing the reinforcement assembly 152 with the bottom plate reinforcement.

At this time, when it is desired to exclude the pouring of the topping concrete 150 in the space between the square pipes 131 of the two-way grid-type structure 130, the panel 151 for the bottom plate formwork is installed between the square pipes 131, and the topping concrete (150) is poured.

In addition, in the process of connecting the precast slab 100 and the beam member 200 using the two-way grid-type structure to each other, the transverse connection portion of the precast slab 100 using the two-way grid-type structure is naturally in the longitudinal direction. This is formed because a space for pouring the topping concrete 150 is naturally formed in the transverse connection part in the process of the precast lower plate 110 in contact with each other in the longitudinal direction. It is possible to integrate the precast slab 100 using the directional lattice structure in the longitudinal direction as well.

[ Construction method of the precast slab 100 using the two-way grid-type structure of the present invention ]

4A and 4B are diagrams illustrating a structure construction using the precast slab 100 using the two-way grid-type structure of the present invention.

The precast slab 100 using the two-way grid-type structure is, for example, after the construction of the base plate in a distribution warehouse, etc., and then the column structure 300 is constructed, and the beam between the column structure 300 and the column structure 300 . The member 200 is installed to extend horizontally up and down according to the number of layers of the structure, and between the beam member 200 and the beam member 200, a precast slab 100 using the two-way grid-type structure of the present invention. After installing so that both ends are supported, the bottom plate of each floor is constructed using the topping concrete 150.

Accordingly, the precast slab 100 using the two-way lattice structure is manufactured in advance at the factory.

The precast slab 100 using this two-way grid-type structure is a precast lower plate 110 in which the two-way grid-type structure 130 is integrated with the shear connector 133 on the upper surface of the precast lower plate 110, and the two-way grid-type structure 130 ), the shear connecting material 133 is exposed, and it can be seen that the reinforcing plate 132 is also formed to be used.

The precast lower plate 110 is placed on the tension member accommodating block 113 on the upper surface of the horizontal plate 111 .

The two-way lattice-type structure 130 is integrated, and the prestress is introduced using the tension member 112 to contribute to the reduction of self-weight as described above.

Accordingly, the base plate 310 is first constructed based on FIG. 4A .

Such a base plate 310 can be formed by direct construction at the site in a manner of constructing a reinforced concrete base plate by reinforcing the base plate reinforcement and pouring concrete in the excavation space after excavating the ground plate.

Accordingly, when the construction of the base plate 310 is completed, a plurality of precast column structures 300 manufactured in factories, etc. are set vertically spaced apart from each other according to the structure, and the beam member 200 is placed between the column structures 300 . will connect

Next, as shown in FIG. 4A , both ends of the precast slab 100 using a two-way grid-type structure are installed between the beam members 200 to be supported. This is to construct a floor plate on each floor of the structure, and the floor plate for the second floor is first constructed from the base plate 310 .

Accordingly, the precast slab 100 using the two-way grid-type structure is in contact with each other so that the lateral connection portion is naturally formed, and the connection portion with the beam member 200 is also naturally formed in the process of supporting both ends.

Next, as shown in Figure 4b, the beam member 200 and the precast slab 100 using the two-way lattice structure is used as a form and the topping concrete 150 is poured to construct the floor plate 330.

At this time, the longitudinal connection portion of the precast slab 100 using the two-way grid-type structure is the shear connector 133 of the two-way grid-type structure 130, and the beam member 200 connection portion (transverse connection portion) is the beam The beam connection reinforcing bar 210 drawn out from the member 200 and the reinforcing bar assembly as the bottom plate reinforcing bar can be used to synthesize each other and construct. Accordingly, by sequentially post-constructing the upper floors of the second floor, it is possible to complete all the floor plates and finally complete the structure.

As a result, it can be seen that the present invention does not use the EPS block, and uses the two-way grid-type structure 130 to more effectively resist the bending stiffness and shear force against the load acting in the longitudinal and transverse directions of the precast slab. can

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: Precast slab using a two-way grid-type structure
110: precast lower plate 111: horizontal plate
112: tension member 113: tension member receiving block
130: lattice-type structure 131: square tube
132: reinforcing plate 133: shear connector
134: panel support channel 150: topping concrete
151: panel for bottom plate formwork 152: rebar assembly
200: beam member 210: beam connection reinforcing bar
220: body 300: column structure
310: base plate
330: bottom plate S1: hollow part

Claims (8)

A precast lower plate 110 including a tension member receiving block in which the tension member is accommodated therein protruding from the horizontal plate; and
It is integrated using a shear connector on the upper surface of the tension member receiving block, and the square tube 131 is formed in a grid shape so that the inner space of the square tube serves as a hollow part (S1), including longitudinal and lateral directions A precast slab using a two-way grid-type structure, including; a two-way grid-type structure 130 that can resist both bending rigidity in two directions and a shear force at the connection portion with the beam member 200. The method of claim 1,
Using the precast lower plate 110 as a mold, the topping concrete 150 is further poured,
As the two-way grid-type structure 130 is buried by the topping concrete 150, the precast slab 100 using the two-direction grid-type structure is integrated with each other at the transverse connection part by a shear connector,
The topping concrete 150 is also poured in the connection part of the precast slab 100 and the beam member 200 using a two-way grid-type structure, so that the square pipe 131 together with the beam connection reinforcing bar 210 of the beam member 200 is A precast slab using a two-way grid-type structure to be embedded in the topping concrete (150). The method of claim 1,
Bending rigidity and shear force of the two-way grid-type structure 130 by further attaching reinforcing plates 132:132a, 132b to the square tube 131 of the two-way grid-type structure 130, the upper surface and the side surface of the square tube 131 A precast slab using a two-way lattice structure to provide additional resistance to The method of claim 1,
The topping concrete 150,
On the upper surface of the two-way grid-type structure 130, with or without installing the panel 151 for the bottom plate formwork, the topping concrete 150 is poured so that the bottom plate 330 can be constructed,
The panel 151 for the bottom plate formwork is supported by the panel support channel 134 formed at the corner of the square pipe 131 , and the topping concrete 150 has a wire formed on the two-way grid-type structure 130 . A precast slab using a two-way grid-type structure to further embed the reinforcing bar assembly 152 including the mesh. The method of claim 1,
The precast slab 100 using the two-way grid-type structure,
It is installed so that both ends are supported between the beam members 200 installed between the column structures 300, and is integrated by the beam member 200 and the topping concrete 150,
The precast slab 100 using the two-way lattice structure by the topping concrete 150 is integrated in the transverse connection part,
The integration of the beam member 200 and the topping concrete 150 is achieved by the beam connecting reinforcing bar 210 of the beam member 200 and the square pipe 131 of the two-way grid-type structure 130 extending toward the beam member 200. It is made by being buried in the topping concrete 150,
The precast slab 100 using the two-way lattice structure by the topping concrete 150 is integrated at the transverse connection part, the square pipe 131 exposed to the transverse connection part and the shear connector 133 formed in the square pipe 131 ) is embedded in the topping concrete 150
A precast slab using a two-way grid structure. (a) installing the beam member 200 to the column structure 300;
(b) installing between the beam members 200 so that both ends of the precast slab 100 using the two-way lattice structure of claim 1 are supported; and
(c) the precast slab 100 using the two-way lattice structure is installed so that both ends are supported between the beam members 200, so as to be integrated by the beam member 200 and the topping concrete 150 A method of constructing a structure using a precast slab using a two-way grid-type structure comprising a. 7. The method of claim 6,
On the upper surface of the two-way grid-type structure 130 of the precast slab 100 using the two-way grid-type structure of the step (b), with or without installing the panel 151 for the bottom plate formwork, the topping concrete 150 A two-way lattice-type structure to be supported by the panel support channel 134 formed in the corner of the square pipe 131 so as to be able to construct the floor plate 330 by pouring the Structure construction method using precast slabs. 7. The method of claim 6,
In step (c),
By using the beam member 200 and the precast slab 100 using the two-way lattice structure as a formwork, the topping concrete 150 is poured to construct the floor plate 330,
The transverse connection portion of the precast slab 100 using the two-way grid-type structure is the shear connecting material 133 of the two-way grid-type structure 130, and the connecting portion of the beam member 200 is drawn out from the beam member 200. The beam connection reinforcing bar 210 and the reinforcing bar assembly as the base plate reinforcing bar are used to synthesize and construct with each other. Structure construction method using precast slabs.

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