Patent Application
20200040580
This application claims priority to and the benefit of Korean Patent Application No. 2018-0090642, filed on Aug. 3, 2018, the disclosure of which is incorporated herein by reference in its entirety.
The present invention relates to a textile-reinforced concrete structure using a textile grid fixing apparatus, and more specifically, to a textile-reinforced concrete structure using a textile grid fixing apparatus which fixes a textile grid reinforcement material disposed between a mold and a reinforcing bar when a reinforced concrete structure is constructed, and a construction method for the same.
Generally, reinforced concrete in which concrete and reinforcing bar are combined is most widely used for building and civil engineering structures and is known as a structure material which is economical and has high durability. Further, the reinforced concrete is known as a composite material with a function which is optimal in terms of long-term durability as well as mechanical strength. However, according to various recently conducted research and field investigations, it is reported that durability of the reinforced concrete may be degraded due to corrosion of a reinforcing bar so that a severe problem is caused throughout the reinforced concrete structure.
The main factor that degrades durability of a reinforced concrete structure is corrosion of an embedded reinforcing bar, and the main factor that causes corrosion of the embedded reinforcing bar may be permeation of chlorine ion and carbon dioxide. When the reinforcing bar corrodes, corrosion products are formed on a surface of the embedded reinforcing bar to cause cracks and delamination of concrete, and the cracks and delamination allow an external harmful factor to easily permeate the concrete, and thus corrosion of the reinforcing bar is accelerated.
Therefore, safety and durability of the reinforced concrete structure are highly degraded, and in severe cases, the structure may collapse. Further, when the reinforced concrete structure is already damaged, a work of repairing and reinforcing the reinforced concrete structure is very difficult, limited, and costly.
Specifically, the degradation of the reinforced concrete structure is affected by quality of used concrete and reinforcing bars, an environmental factor, a physical factor, and the like, and particularly, mainly by corrosion of a reinforcing bar embedded in the concrete. In particular, when salinity in the seawater or calcium chloride used to melt snow on a road in winter time permeates the concrete when a reinforced concrete structure is positioned in a marine environment, the reinforcing bar embedded in the concrete corrodes easily, and the corroding reinforcing bar expands so as to generate fine cracks on the concrete.
In the case of the concrete structure according to the conventional art, as shown in
As shown in
Therefore, as shown in
As shown in
Further, the textile grid reinforcement material 40 uses a high strength fabric in order to have tensile strength greater than a plastic grid and tensile strain less than the plastic grid so as to have structural material properties which are excellent for constructing and reinforcing a structure. However, a method of effectively fixing the textile grid reinforcement material 40 between a reinforcing bar 20 and a mold when the textile-reinforced concrete structure 10 is constructed is not yet provided.
Meanwhile, the textile-reinforced concrete is used for constructing a building and a civil engineering structure internationally, but a method of effectively fixing the textile grid when the textile-reinforced concrete structure is constructed is not provided, and a precast concrete product in which a textile grid is fixed to a mold is pre-produced in a factory.
Further, according to the conventional art, a spacer or a chair produced for arrangement of a reinforcing bar is applied as a textile grid fixing device. However, since the textile grid fixing device is invented for a purpose of maintaining a space between the reinforcing bar and the mold, the textile grid fixing device may not be fixed to the mold, and thus the textile grid fixing device cannot support a pouring pressure when concrete is poured, and a textile grid cannot be precisely disposed and constructed.
As a related art associated with fixing the textile grid, Korean Registration Patent No. 10-1612800 discloses an invention titled “Method of Repairing and Reinforcing Tunnel, Bridge, Cavity, and Reinforced Concrete Structure Using a Lattice-Shaped Fabric Mesh and Cement Matrix as a Reinforcement Material for Increasing Load Carrying Capacity and Fire Resistance.” Specifically, the invention relates to a method of improving repair, reinforcement, and earthquake resistance of a structure using a lattice-shaped mesh and cement matrix with increased attachment force and fire resistance, and a method of fixing a lattice-shaped fabric mesh to conventional concrete using a rivet-shaped temporary fixing unit is suggested.
Further, as another related art associated with fixing a textile grid, Korean Registration Patent No. 10-1434523 discloses an invention titled “Method of Repairing and Seismic-Reinforcing a Concrete Structure Using Inorganic-Based Cement Matrix and Coated Fabric Grid.” The invention relates to a method for performing repair on and adding earthquake-resistance to a concrete structure with a fabric grid and inorganic-based cement matrix, and a rivet-shaped fixing unit is suggested therein.
Further, as another conventional art associated with fixing a textile grid, Korean Registration Patent No. 10-454021 discloses an invention titled “Method of Repairing and Reinforcing a Concrete Structure using a Hybrid Structure,” and a method of fixing a grid to a conventional concrete using a fastener with an anchor fastening hole is suggested therein.
However, the above-described fixing device relates to a method of pouring mortar or concrete on a textile fixed to a cross section of conventional concrete, and thus the fixing device cannot be applied between a mold and an arranged reinforcing bar when a structure is newly constructed.
(Patent Document 0001) Korean Registration Patent No. 10-1759796 (Filed on Nov. 16, 2015), Title of Invention: “Apparatus of Manufacturing Precast Concrete.”
(Patent Document 0002) Korean Registration Patent No. 10-1612800 (Filed on Dec. 24, 2015), Title of Invention: “Method of Repairing and Reinforcing Tunnel, Bridge, Cavity, and Reinforced Concrete Structure using a Lattice shaped-Fabric Mesh and Cement Matrix as a Reinforcement Material for Increasing Load Carrying Capacity and Fire Resistance.”
(Patent Document 0003) Japanese Registration Patent No. 6,129,835 (Filed on Aug. 6, 2012), Title of Invention: “Method of Reinforcing Building Member.”
(Patent Document 0004) Korean Registration Patent No. 10-454021 (Filed on Oct. 28, 2002), Title of Invention: “Method of Repairing and Reinforcing a Concrete Structure using a Hybrid Structure.”
(Patent Document 0005) Korean Registration Patent No. 10-1434523 (Filed on Nov. 29, 2013), Title of Invention: “Method of Repairing and Seismic-Reinforcing a Concrete Structure using Inorganic-Based Cement Matrix and Coated Fabric Grid.”
(Patent Document 0006) Japanese Patent Application Laid-Open No. 2017-160780 (Published on Sep. 14, 2017), Title of Invention: “Method of Reinforcing a Building Member.”
The present invention is directed to providing a textile-reinforced concrete structure using a textile grid fixing device, which precisely disposes a textile grid at a predetermined position between a mold and a main reinforcing bar using a textile grid fixing device so as to prevent a tensile grid from being moved by a pouring pressure when concrete is poured, and a construction method thereof.
The present invention is directed to providing a textile-reinforced concrete structure using a textile grid fixing device which allows a textile grid fixing device to be fixed to one side of a mold and allows a textile-reinforced concrete structure to be constructed using a textile grid fixing device so as to suppress fine cracks from being generated on a surface of concrete and prevent water, chloride, and the like from permeating a concrete structure, and a construction method thereof.
The present invention is directed to providing a textile-reinforced concrete structure using a textile grid fixing device which allows a surface of a concrete structure to be protected from an external environment when the textile-reinforced concrete structure is constructed so as to reduce a covering thickness of concrete, and a construction method thereof.
According to an aspect of the present invention, there is provided a textile-reinforced concrete structure using a textile grid fixing device which includes poured concrete poured in a mold to form a textile-reinforced concrete structure, a reinforcing bar assembled and disposed in the mold, a plurality of textile grids installed between the reinforcing bar and the mold, and a textile grid fixing device including a head, a cover, a supporting part, and an anchor, wherein the plurality of textile grids are fixedly disposed on the head, the anchor is fixed to one side of the mold, and the textile grid fixing device is fixed to one side of the mold so that the textile grids are fixed between the reinforcing bar and the mold, the textile grids are fixedly disposed on the textile grid fixing device, the anchor of the textile grid fixing device is cut or disassembled, and the mold is removed so that a cross section of the textile-reinforced concrete structure is completed.
The textile grid fixing device may include a head including a grip groove and a head fastening hole, wherein the plurality of textile grids may be fixedly inserted into the grip groove, a cover including a fastening anchor and a grid insertion groove, wherein the fastening anchor may be fastened to a head fastening hole while the textile grids are disposed between the grip groove and the grid insertion groove, a supporting part fastened to a lower portion of the head to function as a support, and an anchor having one sides fixed to the mold and the other sides fastened to a lower portion of the supporting part and cut or disassembled after the concrete is cured.
The textile grid fixing device may further include an expansion joint coupled between the head and the supporting part so that a height of the textile grid fixing device is adjustable according to spatial needs.
The anchor may be a bolt-type anchor or a wedge anchor.
The bolt-type anchor may have a bolt thread formed on one side thereof and a fixing tab formed on the other side thereof so that the textile grid fixing device is fixed to one side of the mold in a bolt manner.
The wedge-type anchor may have a bolt thread formed on one side thereof and a wedge groove which is formed on the other side thereof and into which a wedge is inserted so that the textile grid fixing device is fixed to one side of the mold in a wedge manner.
The grip groove formed in the head may be formed to have a depth sufficient for two textile grids to be simultaneously inserted thereinto.
According to another aspect of the present invention, there is provided a method of constructing a textile-reinforced concrete structure using a textile grid fixing device which includes the steps of a) installing a textile grid fixing device, including a head, a cover, a supporting part, and an anchor, in a mold, b) fixedly disposing a textile grid on the textile grid fixing device, c) assembling and disposing a reinforcing bar in the mold for a textile-reinforced concrete structure, d) pouring poured concrete in the mold, e) removing or disassembling the anchor of the textile grid fixing device after the poured concrete is cured and removing the mold, and f) completing a cross section of a textile-reinforced concrete structure, wherein the textile grid fixing device is fixed to one side of the mold so that the plurality of textile grids are fixed between the reinforcing bar and the mold, the textile grids are fixedly disposed on the textile grid fixing device, the anchor of the textile grid fixing device is cut or disassembled, and the mold is removed so that a cross section of the textile-reinforced concrete structure is completed.
The textile grid fixing device in the step a) may be installed on the mold and a connection part between the molds or in a through hole formed at a predetermined position of the mold.
The textile grid fixing device may be minimally formed to support only one end portion of the textile grid and the connection part when the mold and the anchor is directly fastened to each other while a horizontal member, such as a slab, is constructed.
The textile-reinforced concrete structure may be a concrete structure with a curved surface including tunnel lining or a wastewater structure, wherein the textile grid fixing device may be fixed to the mold formed with a curved surface, the textile grid may be fixedly disposed to correspond to the mold formed with the curved surface, and the textile-reinforced concrete structure may be precisely constructed.
The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing exemplary embodiments thereof in detail with reference to the accompanying drawings.
Hereinafter, embodiments that are easily performed by those skilled in the art will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention may be implemented in several different forms and are not limited to the embodiments described herein. In addition, parts irrelevant to description will be omitted in the drawings to clearly explain the embodiments of the present invention. Similar parts are denoted by similar reference numerals throughout this specification.
Throughout the specification, when a portion “includes” an element, the portion may include the element or another element may be further included therein, unless otherwise described.
[Textile Grid Fixing Device]
Referring to
As shown in
As shown in
As shown in
As shown in
The anchor 250 or 260 has one sides fixed to the mold 120 and the other sides fastened to a lower portion of the supporting part 240 and is cut or unfastened after concrete is cured. In this case, the anchor 250 or 260 may be one of two kinds of a bolt-type anchor 250 and a wedge-type anchor 260. As shown in
It is preferable that each part of the textile grid fixing device 200 according to one embodiment of the present invention is manufactured of a high strength and noncorrosive material, such as nonferrous metal, high strength plastic, a composite material, or the like.
As shown in
Further, as shown in
The textile grid fixing device 200 according to one embodiment of the present invention may also be applied to construction of a horizontal member such as a slab or the like. For example, as shown in
Further, even when a structure with a curved surface, such as tunnel lining, wastewater structure, or the like, is constructed, the textile grid fixing device 200 according to one embodiment of the present invention may be precisely constructed by being fixed to a mold and fixedly disposing the textile grid 140 to be matched with the curved mold.
[Textile-Reinforced Concrete Structure Using Textile Grid Fixing Device]
The textile grid fixing device 200 according to one embodiment of the present invention may be applied to construction of various concrete structures or members, such as a wall (a vertical member), a slab (a horizontal member), a circular member, and the like, but will be described with reference to
Referring to
The poured concrete 110 is poured in the mold 120 to form the textile-reinforced concrete structure 100, and the reinforcing bar 130, which is transverse and longitudinal embedded reinforcing bars, is assembled and disposed in the mold 120.
The textile grids 140 are installed between the reinforcing bar 130 and the mold 120, and the plurality of textile grids 140 are fixed and connected by the textile grid fixing device 200.
The textile grid fixing device 200 includes a head 210, a cover 220, a supporting part 240, and anchor 250 or 260, wherein the plurality of textile grids 140 are fixedly disposed on the head 210, and the anchor 250 or 260 is fixed to one side of the mold 120. In this case, the textile grid fixing device 200 is fixed to one side of the mold 120 so that the textile grid 140 is fixed between the reinforcing bar 130 and the mold 120, the textile grid 140 are fixedly disposed on the textile grid fixing device 200, the anchor 250 or 260 of the textile grid fixing device 200 is cut or disassembled, and the mold 120 is removed so that a cross section of the textile-reinforced concrete structure 100 may be completed. In this case, when a working space between the mold 120 and the reinforcing bar 130 is insufficient, the textile grid fixing device 200 is pre-fixed to one side of the mold in advance before the mold 120 is assembled, the textile grid 140 is assembled in the textile grid fixing device 200, and the mold 120 may be installed.
Specifically, in the textile-reinforced concrete structure 100 using a textile grid fixing device according to one embodiment of the present invention, when the concrete structure is constructed, a plurality of textile grid fixing devices 200 are fixed to one side of the mold 120, concrete is poured and cured while the textile grid 140 is fixedly disposed, the anchor 250 or 260 of the textile grid fixing device 200 is cut or disassembled, the mold 120 is removed, and thus a cross section of the textile-reinforced concrete structure 100 may be precisely completed.
Therefore, according to one embodiment of the present invention, when the concrete structure 10 is constructed, a plurality of textile grid fixing devices 200 are fixed to one side of the mold 120, concrete is poured and cured while the textile grid 140 is fixedly disposed, the anchor 250 or 260 of the textile grid fixing device 200 is cut or disassembled, and the mold 120 is removed, and thus a cross section of the textile-reinforced concrete structure 100 may be precisely completed.
Further, when a working space between the mold 120 and the reinforcing bar 130 is insufficient, the textile grid fixing device 200 is pre-fixed to one side of the mold before the mold 120 is assembled, the textile grid 140 is assembled in the textile grid fixing device 200, and the mold 120 may be installed.
[Method of Constructing a Textile-Reinforced Concrete Structure Using a Textile Grid Fixing Device]
Referring to
As shown in
As shown in
As shown in
As shown in
As shown in
Accordingly, according to one embodiment of the present invention, a textile grid is precisely disposed at a predetermined position between a mold and a main reinforcing bar using a textile grid fixing device so as to be prevented from being moved by a pouring pressure when concrete is poured, and thus a textile-reinforced concrete structure can be precisely constructed.
According to one embodiment of the present invention, the textile grid fixing device is fixed to one side of the mold, and the textile-reinforced concrete structure is constructed using a textile grid fixing device so that fine cracks can be suppressed from being generated on a surface of concrete, and thus water, chloride, and the like can be prevented from permeating a concrete structure. Therefore, service lifetime of the textile-reinforced concrete structure can be extended, and safety thereof can be improved.
According to one embodiment of the present invention, a surface of the concrete structure is protected from an external environment when the textile-reinforced concrete structure is constructed so that a covering thickness of concrete is reduced, and thus the textile-reinforced concrete structure can be economically constructed.
According to the present invention, a textile grid is precisely disposed at a predetermined position between a mold and a main reinforcing bar using a textile grid fixing device so as to be prevented from being moved by a pouring pressure when concrete is poured, and thus a textile-reinforced concrete structure can be precisely constructed.
According to the present invention, the textile grid fixing device is fixed to one side of a mold, and a textile-reinforced concrete structure is constructed using the textile grid fixing device so that fine cracks are suppressed from being generated on a surface of concrete, and water, chloride, and the like are prevented from permeating the concrete structure, and thus service life of the textile-reinforced concrete structure can be extended, and safety can be improved.
According to the present invention, a surface of a concrete structure is protected from an external environment when a textile-reinforced concrete structure is constructed so that a covering thickness of concrete can be reduced, and thus, a textile-reinforced concrete structure can be economically constructed.
The above description is only exemplary, and it should be understood by those skilled in the art that the present invention may be performed in other concrete forms without changing the technological scope and essential features. Therefore, the above-described embodiments should be considered as only examples in all aspects and not for purposes of limitation. For example, each component described as a single type may be realized in a distributed manner, and similarly, components that are described as being distributed may be realized in a coupled manner.
The scope of the present invention is defined not by the detailed description but by the appended claims and encompasses all modifications or alterations derived from meanings, the scope, and equivalents of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-0090642 | Aug 2018 | KR | national |
