KR20230046923A - A Section Reducing Member and a Fixing Frame for Concrete Structure and a Construction Method thereof - Google Patents

Abstract

The present invention relates to a structure of a cross-section reducing member and a fixture of a concrete structure that can sufficiently exert a crack inducing effect while reducing the cross-sectional area of the cross-section reducing member, and construction method. According to the present invention, an installation structure of a cross-section reducing member of a concrete structure comprises: a cross-section reducing member (30) which is erected on the surface of a construction target and has a cross-section whose height is greater than the thickness extending in the longitudinal direction; waterproof paper (50) covering the surface of the construction target and the cross-section reducing member (30) in a state where the cross-section reducing member (30) is erected on the construction target surface; and a fixture (10) connected to the cross-section reducing member (30) and fixed to the surface of the construction target while the waterproof paper (50) is covered with the surface of the construction target and the cross-section reducing member (30).

Description

A Section Reducing Member and a Fixing Frame for Concrete Structure and a Construction Method thereof}

The present invention relates to a cross section reducing member for inducing cracks in a concrete structure having a large cross section to occur at a specific location, a structure of a fixing base supporting the cross section reducing member, and a method of constructing a concrete structure using the same.

If the crack induction joint is not constructed or poorly constructed in the median strip of the highway, retaining wall, underground driveway, etc., a large number of cracks occur in unintended places. These multiple cracks often make repair and reinforcement work difficult, reduce the durability of concrete structures, and also degrade aesthetics.

Patent Registration No. 2056025 discloses a crack-inducing joint structure of a concrete structure having a large cross section and a construction method thereof. In this crack-induced joint structure, the height of the cross-section reducing member is low and the width is larger than that, so self-reliance is good, but if the thickness of the concrete structure is considerably thick, a larger cross-section reducing member must be used, which increases the cross-sectional area occupied by the cross-section reducing member. Therefore, it cannot be ruled out that the strength of the concrete structure itself will be lowered.

However, if a cross-section reducing member having a cross-sectional shape that is difficult to stand on its own is used, it is difficult to self-support, and problems such as the cross-section reducing member falling or tilting due to the influence of horizontal force and impact force during the concrete casting process occur. do.

The present invention has been made to solve the above problems, to provide a cross-section reducing member capable of sufficiently exhibiting a crack inducing effect while reducing the cross-sectional area of the reducing member.

In addition, the present invention is to provide a structure of a fixing base that firmly supports such a cross-section reducing member so that the cross-section reducing member can maintain the correct position and posture during the concrete casting process.

In addition, the present invention is to provide a structural construction method of a crack induction joint of a concrete structure using the cross section reducing member and the fixing table.

In order to solve the above problems, the present invention provides a cross-section reducing member of a plate material (板材) installed in parallel with the guide direction of the crack.

The cross-sectional reduction member may be various, such as wood, plywood, plastic, rubber, and steel. The material of the cross section reducing member is not limited as long as it can maintain its shape at an appropriate level in a state embedded in concrete.

A fitting hole penetrating in the thickness direction may be formed in the cross section reducing member. A plurality of fitting holes may be spaced apart from each other along the longitudinal direction of the cross section reducing member.

In order to fix and support the cross-section reducing member in a regular position, the cross-section reducing member is fixed to the surface of the construction target through a fixing table.

The construction target surface and the cross section reducing member installed thereon may be covered with waterproof paper.

The fixing stand firmly fixes the cross section reducing member to the surface of the construction target in a state where the waterproof paper is covered.

The plate-shaped cross section reducing member is disposed on the surface of the construction target in a erected form, and the fixing stand is fixed to a side surface of the erected cross section reducing member and is also fixed to the target surface.

The fixing unit may be installed on one side of the cross section reducing member, and may also be installed on the other side opposite to that side.

A plurality of fixing units may be spaced apart from each other along the longitudinal direction of the cross section reducing member, and may be alternately disposed on one side and the other side of the cross section reducing member.

Each of the plurality of fixing units may be installed in a plurality of fitting hole portions provided in the cross section reducing member.

The fixing unit may have a vertical member and a horizontal member connected to each other in an “L” shape.

The fixing unit may further include one or more reinforcing members connecting the vertical member and the horizontal member in a diagonal direction.

The fixing unit may be made of at least one of steel, wood, and resin (plastic). The material of the fixing base is not limited as long as it can secure enough strength to keep the section reducing member in the right position in the right position.

The cross-sectional shape of the fixing table may vary. It may include various shapes such as a polygonal shape, a circular shape, and an elliptical shape. For example, the cross section of the vertical member, the horizontal member and/or the reinforcing member constituting the fixing table may be a polygonal shape such as a rectangle or a square or a track shape. In addition, the reinforcing member may be in the form of a hollow tube or a solid solid. For example, the reinforcing member may have a square tube shape or a square bar shape.

In a state in which the cross section reducing member is disposed in a regular position on the surface to be constructed, the vertical member is fixed to the side surface of the cross section reducing member, and the horizontal member is fixed to the surface to be constructed.

The vertical member may be fixed to the cross section reducing member through a conventional fixing member (eg, bolt, nut, screw, nail, etc.). To this end, a reducing member coupling hole may be provided in the vertical member.

Instead of or in addition to this method, the vertical member may be provided with a fitting portion that can be conveniently fixed to the cross section reducing member.

The fitting fixing portion is provided at or near the top of the vertical member, and may include a first fitting fixing portion extending in a "b" shape. The first fixing portion may span the upper surface provided at the upper end of the vertical member and the upper side of the side connected thereto.

The width of the first fixing portion may be greater than or equal to the width of the vertical member. If the width of the first fitting fixing portion is large, it is possible to more stably secure the fixing force for the upper end of the reduced section member.

The fitting fixing part is provided at a selected position between the top and bottom of the vertical member and may include a second fitting fixing part extending in a "b" shape. The second fixing portion may be provided with one or two or more spaced apart in the vertical direction. For example, the number of the second fitting fixing parts may be appropriately determined according to the height of the cross section reducing member and the corresponding height of the vertical member of the fixing table. Of course, according to this, two or more fitting holes may be formed spaced apart in the vertical direction corresponding to one fixing table in the cross section reducing member.

The second fitting fixing part may be fitted into a fitting hole provided in the cross section reducing member. Accordingly, the second fixing portion may pass through the fitting hole and span the bottom portion of the fitting hole and the side surface of the cross-section reducing member connected thereto.

The width of the second fixing portion may be smaller than or equal to the width of the vertical member. If the width of the second fixing portion is small, it is possible to reduce the size of the corresponding hole of the waterproof paper through which the second fixing portion penetrates. The corresponding hole of the waterproof paper may be provided at a position corresponding to the fitting hole of the cross-section reducing member in a state where the waterproof paper is covered, and it may be formed by perforating the waterproof paper in which the cross-section reducing member has not yet formed a corresponding hole. .

A spacing member may be interposed between the horizontal member of the fixture and the surface of the construction target. Then, the horizontal member of the fixture is filled with concrete in the space between the construction target surfaces, so that the horizontal member is not exposed to the construction target surface and is hidden inside the concrete. The spacing member may be provided on waterproof paper. That is, the spacing member may be disposed between the horizontal member and the waterproof paper.

The spacer member is preferably made of a material having some compressibility. Then, when fixing the horizontal member to the surface to be constructed using a fixing member in the form of a fastener such as an anchor bolt, screw, or nail, the spacing member can be compressed to a certain extent, and thus the vertical member can hold the cross section reducing member. will press

Accordingly, when the cross-section reducing member is fixed with the fitting portion of the vertical member, there is no concern that the fitting portion cannot be tightly strung on the cross-sectional reducing member due to manufacturing tolerances or construction errors. In other words, while the horizontal member is clamped and fixed to the surface to be constructed in a state where the fitting part of the vertical member spans the cross-section reducing member, but the spacing member has some degree of compressibility, both the manufacturing tolerance or construction error of the fixing base and the cross-sectional reducing member are reduced. absorption, and it is possible to secure the bonding force between the vertical member and the cross-section reducing member.

Of course, it is not excluded that the spacer member is made of an incompressible material. For example, the spacing member may be made of wood, plastic, rubber, or the like, or may be made of steel.

The fixing member fixing the horizontal member to the construction target surface may fix the horizontal member and the construction target surface in a form penetrating the horizontal member and the spacing member. To this end, a bottom coupling hole may be provided in the horizontal member to allow the fixing member to pass through, and a through hole may be provided in the spacing member to allow the fixing member to pass through.

The construction target surface may be the surface of concrete that has already been poured and cured, ground, bedrock, or the inner surface of a formwork.

The construction method of the cross-section reducing member using the cross-section reducing member and the fixture and the concrete structure construction method using the same are as follows.

First, clean the surface to be constructed.

Then, the cross section reducing member is cut according to the dimensions of the construction area of the surface to be constructed. If necessary, a fitting hole is machined in the cross section reducing member.

Then, a cross-section reducing member is disposed on the surface to be constructed to correspond to the spacing of joints to be constructed. At this time, the cross section reducing member may be erected to be substantially perpendicular to the surface to be constructed.

Then, the cross section reducing member and the surface to be constructed are covered with waterproof paper. The waterproof paper may cover the top and both sides of the cross section reducing member, and a form that is substantially in close contact with the surface of the construction target connected thereto.

Then, at the location where the fixing stand is to be installed, a spacing member is disposed on the surface of the waterproof paper, and a vertical member of the fixing stand is fixed to the cross section reducing member. At this time, the fixing table may be fixed to the side surface of the cross section reducing member using the fitting fixing part of the vertical member. In addition, the vertical member and the cross section reducing member may be additionally fixed using fasteners such as bolts. Accordingly, the waterproof paper of the corresponding area is interposed between the vertical member and the cross-section reducing member.

Then, the horizontal member of the fixing table is fixed to the surface to be constructed with the spacer member and the waterproof paper interposed therebetween. At this time, fasteners such as anchor bolts or nails may be used.

In addition, concrete may be poured on the surface of the construction target so that the spacing member, the fixing table, and the cross section reducing member are buried. At this time, reinforcing bars can be placed as needed.

When the concrete structure is finished with one-time concrete pouring in this way, before the concrete is completely cured at the top of the concrete structure, mark the joint at the position corresponding to the cross section reducing member using an ink line and use a concrete cutter A joint groove is formed by cutting the corresponding part, or a temporary member having a shape corresponding to the joint groove (eg, an inverted trapezoidal shape of the upper and lower sides) at a position corresponding to the cross section reducing member before the concrete is completely cured at the top of the concrete structure After inserting (plastic, wood, etc.), when the concrete is cured, it can be removed to form a joint groove. And it can be finished by filling the joint member (backup material, sealant, asphalt, etc.) in the joint groove.

In the case where the concrete structure needs to be divided into two or more concrete pours, after completing the concrete curing without the joint groove construction and joint member construction, the above work (section reducing member installation, waterproofing paper installation, fixing base installation and concrete pouring) is repeated, and the joint groove construction and joint member construction can be performed in the last concrete casting step.

This concrete structure construction method can be applied not only to floors but also to walls.

When constructing a wall, one side of the formwork becomes the surface to be constructed, and a cross section reducing member and a fixing table are installed as above, and a temporary member for the joint groove is fixed in advance on the opposite formwork facing it, and then concrete is poured and cured. Of course, waterproofing can also be applied in the same form.

In addition, when constructing a wall, both formworks can be used as the surface to be constructed, and the cross-sectional reduction member and the fixing table can be installed as above, and the concrete can be poured and cured. Of course, waterproofing can also be applied in the same form.

More specifically, the cross-section reducing member installation structure of the concrete structure of the present invention is erected on the surface of the construction target, the cross-section reducing member 30 in the form of a cross section extending in the longitudinal direction with a height greater than the thickness; Waterproof paper 50 covering the construction target surface and the cross section reducing member 30 in a state where the cross section reducing member 30 is erected on the construction target surface; And a fixing table 10 connected to the cross-section reducing member 30 and fixed to the construction target surface in a state where the waterproof paper 50 is covered with the construction target surface and the cross-section reducing member 30.

A plurality of fixing units 10 are installed spaced apart along the longitudinal direction of the cross-section reducing member 30, and are provided on one side and the other side of the cross-section reducing member 30 along the longitudinal direction of the cross-section reducing member 30. They can be arranged alternately.

A fitting hole 31 penetrating in the thickness direction may be provided in the cross section reducing member 30 .

A plurality of fitting holes 31 may be spaced apart from each other along the longitudinal direction of the cross section reducing member 30 .

A corresponding hole 55 matching the fitting hole 31 may be formed at a portion where the waterproof paper 50 faces the fitting hole 31 .

The fixing base 10 includes: a horizontal member 12 extending in the width direction and facing the surface of the construction target; a vertical member 14 connected to an end of the horizontal member 12, extending in a height direction, and facing a side surface of the cross-section reducing member 30; and one or more reinforcing members 16 having one end connected to the horizontal member 12 and the other end connected to the vertical member 14.

The vertical member 14 faces the cross section reducing member 30 and may be connected to the cross section reducing member 30 .

The horizontal member 12 may face the surface of the construction target and be connected to the surface of the construction target.

A first fitting fixing part 141 may be provided at an upper end of the vertical member 14 to support the upper end of the cross section reducing member 30 .

The first fitting fixing part 141 includes: a first horizontal part 142 extending in a horizontal direction from the upper end of the vertical member 14 so as to come into contact with the upper end of the cross section reducing member 30; and a first vertical portion 143 extending downward from an end of the first horizontal portion 142 to contact the opposite side surface of the cross section reducing member 30 .

The width of the first fitting fixing part 141 corresponding to the longitudinal direction of the cross section reducing member 30 may be equal to or greater than the width of the vertical member 14 .

At any point between the upper end and the lower end of the vertical member 14, one or more second fitting parts 146 may be provided to support the middle part in the height direction of the cross section reducing member 30.

The second fitting fixing part 146 is: a second horizontal part 147 extending in a horizontal direction from the vertical member 14 so as to come into contact with the bottom portion of the fitting hole 31 provided in the cross section reducing member 30 ); and a second vertical portion 148 extending downward from an end of the second horizontal portion 147 to contact the opposite side surface of the cross-section reducing member 30 .

A cross-section of the fitting hole 31 may be equal to or larger than a cross-sectional shape of the second vertical portion 148 .

A spacing member 70 may be interposed between the horizontal member 12 and the surface to be constructed, providing a gap between the horizontal member 12 and the surface to be constructed.

The fixing member 80 fixing the horizontal member 12 to the surface of the construction target penetrates the spacing member 70 and connects the horizontal member 12 to the surface of the construction target.

The spacing member 70 may be made of a compressible material.

In addition, in the method of constructing a concrete structure using a cross-section reducing member and a fixing stand of the present invention, a cross-section reducing member 30 having a cross section having a height greater than a thickness and extending in the longitudinal direction is erected on the surface of the construction target, and the construction target A first step of covering the surface and the cross section reducing member 30 with waterproof paper 50; Following the first step, a second step of connecting the section reducing member 30 and the fixing table 10 with the waterproof paper 50 interposed therebetween; Following the second step, a third step of fixing the fixing table 10 to the surface of the construction target with the waterproof paper 50 interposed therebetween; and a fourth step, following the third step, of pouring concrete on the surface of the construction target with the fixing table 10 embedded therein.

The second step may include a process of spanning the first fitting fixing part 141 provided at the upper end of the holder 10 to the upper end of the cross section reducing member 30 .

The second step may include a step of inserting the second fitting fixing part 146 provided between the upper end and the lower end of the fixing table 10 into the fitting hole 31 provided in the cross section reducing member 30 and then crossing it. can

The process of spanning the first fitting fixing part 141 and the second fitting fixing part 146 to the cross section reducing member 30 may be performed at one time.

The third step is a process of fixing the fixing base 10 and the surface to be constructed with the fixing member 80 in a state where the spacing member 70 is interposed between the waterproof paper 50 and the fixing base 10. can include

The first to fourth steps may be completed once or repeated two or more times. That is, before proceeding to the fifth step to be described later, the first to fourth steps may be repeated two or more times.

Following the fourth step, a fifth step of forming a joint groove 99 at a position corresponding to the installation position of the cross section reducing member 30 on the top of the poured concrete before curing of the poured concrete is completed; further comprising can do.

The process of forming the joint groove 99 is the first step of cutting the joint groove 99 and then filling the joint member to finish, or inserting the temporary member 90 into the position where the joint groove 99 is to be formed. After curing the concrete in one state, a second step of removing the temporary member 90 and filling the filling member to finish may be included.

The surfaces to be constructed face each other while being spaced apart from each other, and the processes of the first to third steps may be performed on each of the surfaces to be constructed, and then the process of the fourth step may be performed at once. This construction method may be applied to a wall, and the surface to be constructed may be the inner surface of a formwork.

When constructing a wall, one inner surface of the inner surface of the two forms facing each other becomes the surface to be constructed, and the process of the first to third steps can be performed, and the other inner surface is a temporary member for the joint groove (99) (90) can be fixed in advance, and then the fourth step can be performed. Of course, after removing the formwork, the joint groove 99 from which the temporary member 90 is removed can be filled with a filling member to finish.

According to the present invention, it is possible to minimize the reduction in the cross-sectional area of the concrete structure caused by the cross-section reducing member, thereby improving the durability of the concrete structure and sufficiently securing the reduction rate of the cross-section of the concrete structure.

According to the present invention, it is possible to firmly support the cross-section reduction member in the right position and upright position even during the concrete casting process, so that the crack-inducing joint structure can be constructed accurately at the designed position.

According to the present invention, by minimizing the number of fixtures used, the construction can be further simplified, and the crack induction effect can be sufficiently secured while securing more economical efficiency.

According to the present invention, the beauty of the concrete structure can be maintained by allowing cracks to occur at the intended location, and crack repair is economical and easy because the cracks in the concrete structure are intensively generated by the crack inducing joint.

According to the present invention, it is possible to simply construct the crack-induced joint structure, thereby reducing construction costs.

According to the present invention, the crack inducing effect is large, so that the pouring height of a concrete structure with a large cross-sectional area can be made higher than before, thereby dramatically reducing the number of times of dividing and pouring the structure, saving construction costs and shortening the construction period.

The present invention is applicable to various concrete structures. For example, it can be applied to all of the slabs and walls of breakwaters and quay walls of harbors, pavement concrete of roads, buildings, bridges, tunnels, and boxes.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a perspective view of a surface to be constructed.
2 is a perspective view showing a state in which a cross-sectional reduction member is installed on the construction target surface of FIG. 1;
3 is a perspective view showing a state in which the waterproof paper is covered on the construction target surface and the cross-sectional reduction member of FIG. 2;
4 is a first perspective view of the fixing unit, and FIG. 5 is a second perspective view of the fixing unit.
6 is a perspective view showing a state in which a spacing member is disposed on the construction target surface of FIG. 3;
7 is a perspective view showing a state in which the fixing table of FIG. 6 is connected to a cross-section reducing member and mounted on a construction target surface.
8 is a perspective view showing a state in which the fixing table of FIG. 7 is fixed to a surface to be constructed.
9 to 11 show a process of connecting the fixing base to the cross-section reducing member, and FIG. 12 is a side cross-sectional view showing a state in which the fixing base is fixed to the surface to be constructed.
13 and 14 are a first perspective view and a second perspective view showing a state in which a plurality of holders are fixed along the longitudinal direction of the cross-section reducing member.
15 is a perspective view showing a state in which a fixing table of another embodiment is fixed to a construction target surface and a cross-section reducing member.
16 and 17 are first and second perspective views of the fixing unit shown in FIG. 15 .
18 shows a state in which the construction of concrete is poured twice after the cross-sectional reduction member, the fixing table, and the waterproofing paper are constructed on the surface of the construction target.
19 is a cross-sectional view of a state in which a joint groove is formed at the top after concrete is poured once or after concrete is poured twice or more.
20 is a cross-sectional view showing a state in which concrete is poured after constructing the cross-section reduction member and the fixing table of the present invention on both sides of the formwork of the wall.
21 is a cross-sectional view showing a state in which the cross section reducing member and the fixing table of the present invention are installed on one side of the formwork of the wall, and the temporary member is fixed on the other side and then concrete is poured.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the embodiments disclosed below, and various changes may be applied and may be implemented in various different forms. Only this embodiment is provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, but all changes and equivalents included in the technical spirit and scope of the present invention as well as substitution or addition of the configuration of one embodiment and the configuration of another embodiment each other to substitutes.

The accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and technical scope of the present invention are included. It should be understood to include water or substitutes. In the drawings, components may be exaggeratedly large or small in size or thickness in consideration of convenience of understanding, etc., but due to this, the scope of protection of the present invention should not be construed as being limited.

Terms used in this specification are only used to describe specific implementations or examples, and are not intended to limit the present invention. And expressions in the singular include plural expressions unless the context clearly dictates otherwise. In the specification, terms such as "comprise" and "consist of" are intended to designate that features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist. That is, in the specification, terms such as ~ include, ~ consist of, etc. It should be understood that it does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

When an element is referred to as being “on top” or “under” another element, it should be understood that other elements may exist in the middle as well as being directly above the other element. .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

The cross section reducing member and the fixing rod of the embodiment can be applied to various concrete structures. The concrete structure may be a variety of structures, such as a breakwater of a harbor or quay wall, which is a marine structure, box slabs and walls of buildings, bridges, tunnels, etc., and its application fields are not limited to those listed.

Hereinafter, with reference to the accompanying drawings, a cross section reducing member of an embodiment, a fixture thereof, and a structure and construction method of a concrete structure to which the same is applied will be described.

The cross section reducing member of the embodiment may be installed on the surface of the construction target. Referring to Figure 1, the construction target surface (C) may be a pre-formed concrete. In addition to this, the construction target surface may be a ground, a bedrock, a wall, or a formwork surface, and the construction target surface is not limited to the items listed.

As shown in FIG. 2, a cross section reducing member 30 may be installed on the construction target surface C in an upright form. The cross section reducing member 30 may be made of steel, wood, plywood, resin material such as plastic or rubber, and may be in the form of a plate as shown.

The cross section reducing member 30 may be installed in a substantially vertically erected position on the surface C to be constructed at a location where cracks are to be induced.

An insertion hole 31 may be formed in the cross section reducing member 30 to fix the fixing table 10 to be described later. The fitting hole 31 may have a shape passing through the reducing member 30 in a thickness direction of the reducing member 30 . The cross-sectional shape of the fitting hole 31 is not particularly limited, but may correspond to or slightly larger than the cross-sectional shape of the second vertical portion 148 of the second fitting fixing portion 146 to be described later. In addition, the shape of the bottom of the fitting hole 31 may be a shape corresponding to the shape of the bottom surface of the second horizontal portion 147 of the second fitting fixing part 146 .

As shown, a plurality of fitting holes 31 may be spaced apart along the longitudinal direction of the cross section reducing member 30 . In the embodiment, a form in which one fitting hole 31 is formed in the vertical direction is illustrated, but the second vertical portion 148 of the second fitting fixing portion 146 that can be determined according to the height of the cross-section reducing member 30 Of course, two or more may be formed in the vertical direction so as to correspond to the number and position of.

In a state in which the section reducing member 30 is erected, a waterproof paper 50 may be covered as shown in FIG. 3 . The waterproof paper 50 may be covered in a form that is substantially in close contact with the upper surface, both sides of the erected cross-section reducing member 30 and the construction target surface C on which the cross-sectional reducing member 30 is erected.

In a state where the waterproof paper 50 is covered, a corresponding hole 55 may be perforated in the waterproof paper 50 . If the corresponding hole 55 is formed in a state where the waterproof paper 50 is covered with the cross section reducing member 30, the position of the corresponding hole 55 and the position of the fitting hole 31 can be easily matched . Of course, the technical concept of the present invention does not exclude the pre-drilling of the corresponding hole 55 in the waterproof paper 50 and covering it on the cross-section reducing member 30.

The corresponding holes 55 may be provided at all positions of the waterproof paper 50 corresponding to both ends of the fitting holes 31 (see FIGS. 13 and 14).

The waterproof paper 50 may be made of a P.E. film or an asphalt sheet, and is responsible for the waterproof function of the concrete structure. That is, when a crack is induced in a concrete structure by the cross section reducing member 30 of the present invention, the moisture permeated through the crack is no longer permeated by the waterproof paper 50.

When installing the cross-section reducing member 30 so that cracks can be induced into the reduced cross-sectional area of the concrete structure, when the thickness of one casting of concrete (approximately 30 cm or more) is thick, the difference in concrete height on both sides of the reduced cross-section member during concrete pouring When the lateral pressure is applied, when the concrete falling from the pump car hose directly hits the cross-section reducing member 30 and the impact is applied, and when the poured concrete flows and the cross-section reducing member is pushed, the installed cross-section reducing member 30 There is a risk that cracks may not be induced to the area where the cross section is reduced due to tilting or breakage.

As a countermeasure against this, in the state where the waterproof paper 50 is covered, the cross section reducing member 30 is firmly fixed to the construction target surface C through the fixing table 10 as shown in FIG.

When the fixing table 10 is applied, a material in the form of a plate can also be used as the cross-section reducing member 30, the construction speed is fast, crack induction is improved, construction costs are reduced, and Durability is greatly improved.

The structure of the fixing base 10 will be described with reference to FIGS. 4 and 5 of the fixing base. The fixing table 10 is connected to a horizontal member 12 extending in a direction away from the cross-section reducing member 30 along the construction target surface C, and an end of the horizontal member 12, and the cross-section reducing member It includes a vertical member 14 extending in a direction away from the surface (C) to be constructed along the side surface of (30), that is, in a height direction (vertical direction).

The extending direction of the horizontal member 12 corresponds to the thickness direction of the cross section reducing member 30 . The horizontal member 12 faces the surface (C) of the construction target.

The extending direction of the vertical member 14 corresponds to the height direction of the cross section reducing member 30 . The vertical member 14 faces the side surface of the cross section reducing member 30 .

The vertical member 14 and the horizontal member 12 may form an "L" shape orthogonal to each other.

The horizontal member 12 and the vertical member 14 may be further connected by a reinforcing member 16 connecting them in an oblique line. The reinforcing member 16 supports the horizontal member 12 and the vertical member 14 . When the vertical member 14 receives a force inclined toward the horizontal member 12, the reinforcing member 16 resists compression. When the vertical member 14 receives a force inclined away from the horizontal member 12, the reinforcing member 16 provides tensile resistance. Accordingly, the reinforcing member 16 resists both the cross-section reducing member 30 from being overturned to one side and the other side in a state where the fixing table 10 fixes the cross-section reducing member 30 to the surface C to be constructed, The cross section reducing member 30 may be supported.

One or two or more reinforcing members 16 may be provided. A plurality of reinforcing members 16 may be spaced apart from each other.

The horizontal member 12 may be provided with a bottom coupling hole 122 penetrating the horizontal member. A plurality of the bottom coupling holes 122 may be spaced apart along the extension direction of the horizontal member 12 . The bottom coupling hole 122 may be provided by avoiding a connection portion with the reinforcing member 16 .

The horizontal member 12 does not necessarily have to have a bottom coupling hole 122. This may be perforated during the process of fixing the construction target surface C and the horizontal member 12 with a fixing member 80 such as a fastener during the construction process. The number of bottom coupling holes 122 may be appropriately determined in consideration of the extension length of the horizontal member 12 and the like.

The vertical member 14 may be provided with a reducing member coupling hole 149 penetrating the vertical member. A plurality of the reducing member coupling holes 149 may be spaced apart from each other along the extending direction of the vertical member 14 . The reduction member coupling hole 149 may be provided by avoiding a connection portion with the reinforcing member 16 . Correspondingly to this, a fastening hole (not shown) may also be provided at a corresponding portion of the cross section reducing member 30 .

The reduction member coupling hole 149 is not necessarily provided in the vertical member 14. Similarly, the cross section reducing member 30 does not necessarily have to have a fastening hole. These may be perforated in the process of fixing the cross section reducing member 30 and the vertical member 14 with the fixing member 80 in the construction process, and the cross section reducing member 30 and the vertical member 14 may be nailed or bolted/nutd. The process itself of connecting to the fixing member 80 of the back may be omitted. The number of the reduction member coupling holes 149 and/or fastening holes may be appropriately determined in consideration of the extension length of the vertical member 14 and the like.

The fixing table 10 may be made of a material having a predetermined strength. These materials may include steel, wood, and resin materials such as plastic or rubber. Cross-sectional shapes of the horizontal member 12, the vertical member 14, and the reinforcing member 16 may be various such as polygonal, circular, elliptical, and track-shaped. And it may be in the form of a hollow tube or a solid column.

A first fitting fixing part 141 may be provided at an upper end of the vertical member 14 to support the upper end of the cross section reducing member 30 .

The first fitting fixing part 141 may have a shape of a hook or hook having an approximate "L" shape. That is, the first fitting fixing part 141 includes a first horizontal part 142 extending in a horizontal direction from the upper end of the vertical member 14 so as to contact the upper end of the cross-section reducing member 30, and the reduced cross-section A first vertical portion 143 extending downward from an end of the first horizontal portion 142 to contact the opposite side of the member 30 may be included.

In the embodiment shown in FIGS. 4 and 5, the width of the first fitting fixing part 141 illustrates the fixing base 10 having a shape corresponding to the width of the vertical member 14. However, the width of the first fitting fixing part 141 may be larger than that of the vertical member 14 as shown in FIGS. 16 and 17 . Then, since the first fitting fixing part 141 fixes the cross section reducing member 30 wider and more firmly supports the cross section reducing member 30, the number of installation of the fixing table 10 can be reduced, making construction simpler. can be economical

At any point between the upper end and the lower end of the vertical member 14, one or more second fitting parts 146 may be provided to support the middle part in the height direction of the cross section reducing member 30. The second fitting fixing part 146 may be provided by avoiding the position of the reduction member coupling hole 149 . When a plurality of the second fitting fixing parts 146 are provided, they may be spaced apart in the vertical direction, and the number of the second fitting fixing parts 146 is determined by considering the extension length of the vertical member 14 and the like. can be determined appropriately.

The second fitting fixing part 146 may have a shape of a hook or hook having an approximate "L" shape. That is, the second fitting fixing part 146 is a second horizontal part 147 extending in a horizontal direction from the vertical member 14 so as to contact the bottom portion of the fitting hole 31 provided in the cross section reducing member 30. ), and a second vertical portion 148 extending downward from the end of the second horizontal portion 147 to contact the opposite side surface of the cross section reducing member 30 .

A cross-section of the fitting hole 31 may be equal to or larger than a cross-sectional shape of the second vertical portion 148 .

The width of the second fitting fixing part 146 may be equal to or smaller than the width of the vertical member 14 . In the embodiment, the width of the second fitting fixing part 146 is smaller than the width of the vertical member 14, so that the fitting hole 31 of the cross section reducing member 30 and the corresponding hole 55 of the waterproof paper 50 corresponding thereto ) By minimizing the size of the cross-sectional area of ), the degradation of the function of the waterproof paper 50 due to the corresponding hole 55 was minimized.

The second fitting fixing part 146 may be provided selectively. That is, it is possible to apply only the first fitting fixing part 141 as needed. Conversely, the first fitting fixing part 141 may be selectively provided. That is, it is also possible that only the second fitting fixing part 146 is applied, if necessary.

The fixing base 10 inserts and connects the vertical member 14 to the cross-section reducing member 30, and then fixes the horizontal member 12 to the surface C to be constructed, so that the cross-section reducing member 30 ) can be firmly fixed to the construction target surface (C).

9 to 11, by approaching the holder 10 from the side of the cross section reducing member 30, the second fitting fixing part 146 inserts the fitting hole 31 of the cross section reducing member 30. In a state in which the first fitting fixing part 141 crosses the top of the cross section reducing member 30, the fixing table 10 is lowered to separate the first fitting fixing part 141 and the second fitting fixing part. 146 is connected to the cross section reducing member 30. Accordingly, the process of connecting and fixing the fixing table 10 to the cross section reducing member 30 can be performed simply.

At this time, as shown in FIGS. 6 and 12 , a spacing member 70 may be interposed between the horizontal member 12 of the fixing table 10 and the waterproof paper 50 . The spacing member 70 may provide a gap between the horizontal member 12 and the surface to be constructed and between the horizontal member 12 and the surface to be constructed.

A through hole 77 may be formed in the spacing member 70 . A fixing member 80 in the form of a fastener such as an anchor bolt or nail for fixing the horizontal member 12 to the surface C of the construction object may pass through the through hole 77 .

The spacing member 70 may be made of a compressible material. As the horizontal member 12 is tightened and brought into close contact with the construction target surface C with the fixing member 80 in the state where the spacing member 70 is interposed, the first fitting fixing portion of the vertical member 14 141 and the second fitting fixing part 146 press the cross section reducing member 30 toward the surface C to be constructed.

At this time, if a slight compressibility is imparted to the spacing member 70, both manufacturing tolerances and construction errors between the fitting portion of the vertical member 14 and the cross-section reducing member can be absorbed in the process of tightening the horizontal member 12.

The spacing member may have a rectangular shape, but the shape is not limited thereto. The spacing member may be made of steel, wood, resin material (plastic, rubber), etc., and is preferably made of resin material.

In addition, when the spacing member 70 is installed, the horizontal member is separated by a certain height from the construction target surface (C) or the waterproof paper, especially the formwork, and the space is filled with concrete, mortar, cement paste, etc., so that even after the formwork is dismantled, the waterproof paper and Since only the spacing member is exposed and the horizontal member is not exposed, corrosion of the horizontal member is prevented and the appearance is good.

In summary, as shown in FIGS. 6 to 8, the spacing member 70 is placed on the construction target surface C, and the vertical member 14 of the fixing table 10 is bound to the cross-section reducing member 30 In this state, the horizontal member 12 of the fixing table 10 may be fixed to the surface C to be constructed.

As shown in FIGS. 13 and 14, a plurality of fixing bases 10 are spaced apart along the longitudinal direction of the cross-section reducing member 30, and the cross-section reducing member along the longitudinal direction of the cross-section reducing member 30 It may be arranged alternately on one side and the other side of (30).

Then, while effectively preventing the cross section reducing member 30 from being overturned to one side, it is possible to reduce the number of installation units of the fixing table 10 .

Hereinafter, a method of constructing a concrete structure using the above-described section reducing member and the fixing table will be described.

First, as shown in Figure 1, the surface (C) of the construction target is arranged.

Then, the cross section reducing member 30 is cut according to the size of the construction area of the surface C to be constructed. If necessary, a fitting hole 31 is machined in the cross section reducing member 30.

And, as shown in FIG. 2, the cross-section reducing member 30 is disposed at a position corresponding to the gap of the joint to be constructed on the surface C to be constructed. At this time, the cross section reducing member 30 may be erected to be substantially perpendicular to the surface to be constructed.

And, as shown in FIG. 3, the cross section reducing member 30 and the surface C of the construction target are covered using waterproof paper 50. The waterproof paper 50 may cover the upper surface and both sides of the cross section reducing member 30, and the surface of the construction target connected thereto in a form that is substantially in close contact with them.

Then, at the position where the fixing table 10 is to be installed, as shown in FIG. 6, the spacer member 70 is disposed on the surface of the waterproof paper 50, and as shown in FIG. 7, the vertical position of the fixing table 10 A member 14 is fixed to the cross section reducing member 30. At this time, as shown in FIGS. 9 to 11 , the fixing table 10 may be fixed to the side surface of the cross section reducing member 30 using the fitting portion of the vertical member 14 . In addition, the vertical member 14 and the cross section reducing member 30 may be additionally fixed using fasteners such as bolts/nuts and nails. Accordingly, the waterproof paper 50 of the corresponding area is interposed between the vertical member 14 and the cross section reducing member 30.

Then, in the state where the spacing member 70 and the waterproof paper 50 are interposed, the horizontal member 12 of the fixing table 10 is fixed to the surface C to be constructed, as shown in FIGS. 8 and 12. At this time, fasteners such as anchor bolts or nails may be used.

A plurality of the fixing bases 10 may be installed. As shown in FIGS. 13 and 14 , the fixing table 10 is alternately installed on one side and the other side of the cross section reducing member 30 along the longitudinal direction of the cross section reducing member 30 .

In addition, concrete (I) may be poured on the surface (C) to be constructed so that the spacer member 70, the fixing table 10, and the cross section reducing member 30 are buried. Although not shown, reinforcing bars may be placed as needed.

The concrete structure, as shown in FIG. 19, may be completed once through the process of pouring concrete (I) while burying the previously described cross-section reducing member 30 and the fixing table 10, and shown in FIG. It may be completed through two or more times as described above.

As shown in FIG. 18, in the construction process of pouring concrete twice or more, the surface of the concrete poured and cured first becomes the surface of the construction target in the next construction process.

When the concrete structure is finished with a single pouring of concrete, as shown in FIG. 19, before the concrete is completely cured at the top of the concrete structure, the joint is marked using an ink line at a position corresponding to the cross section reducing member, The joint groove 99 is formed by cutting the corresponding part using a concrete cutting machine, or the shape corresponding to the joint groove at the position corresponding to the cross section reducing member before the concrete is completely cured at the top of the concrete structure After inserting the temporary member 90 (plastic, wood, etc.) of the narrowly inverted trapezoidal shape), when the concrete is cured, it can be removed to form the joint groove 99. And it can be finished by filling the joint member (not shown) (backup material, sealant, asphalt, etc.) in the joint groove.

As shown in FIG. 18, when the concrete structure needs to be divided into two or more concrete pours, concrete curing is completed without joint groove construction and joint member construction in the concrete pour step before the final concrete pour, and the final concrete In the casting stage, joint groove construction and joint member construction are performed.

This concrete structure construction method can be applied not only to floors but also to walls.

When constructing a wall, as shown in FIG. 21, one side of the formwork becomes the construction target surface C, and as described above, the cross section reducing member 30 and the fixing table 10 are installed, and the opposite formwork facing them is installed in advance. After fixing the temporary member 90 for the joint groove, the concrete (I) can be poured and cured. Of course, the waterproof paper 50 and joint member construction can also be applied in the same form.

Unlike this, as shown in FIG. 20, the cross-section reducing member 30 and the fixing table 10 are installed as above with both forms as the surface (C) of the construction target, and the concrete (I) can be poured and cured. Of course, the waterproof paper 50 can also be applied in the same form.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operation and effect according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention above, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: fixture
12: horizontal member
122: bottom joint
14: vertical member
141: first fixing part
142: first horizontal part
143: first vertical part
146: second fixing part
147: second horizontal part
148: second vertical part
149: reduction member coupling hole
16: reinforcing member
30: section reducing member
31: fitting hole
50: waterproof paper
55: correspondence hole
70: spacing member
77: through hole
C: Construction target surface
80: fixing member
90: temporary absence
I: Poured concrete
99: joint groove

Claims (20)

A cross section reducing member 30 in the form of being erected on the construction target surface and extending in the longitudinal direction with a cross section having a height greater than the thickness;
Waterproof paper 50 covering the construction target surface and the cross section reducing member 30 in a state where the cross section reducing member 30 is erected on the construction target surface; and
In a state where the waterproof paper 50 is covered with the construction target surface and the cross section reducing member 30, a fixing table 10 connected to the cross section reducing member 30 and fixed to the construction target surface; Including,
Installation structure of cross section reduction member of concrete structure.
The method of claim 1,
A plurality of fixing units 10 are installed spaced apart along the longitudinal direction of the cross-section reducing member 30, and are provided on one side and the other side of the cross-section reducing member 30 along the longitudinal direction of the cross-section reducing member 30. arranged alternately,
Installation structure of cross section reduction member of concrete structure.
The method of claim 1,
The cross section reducing member 30 is provided with a fitting hole 31 penetrating in the thickness direction,
A plurality of the fitting holes 31 are arranged spaced apart along the longitudinal direction of the cross section reducing member 30,
Where the waterproof paper 50 faces the fitting hole 31, a corresponding hole 55 matching the fitting hole 31 is formed,
Installation structure of cross section reduction member of concrete structure.
The method of claim 1,
The fixture 10 is:
A horizontal member 12 extending in the width direction and facing the surface of the construction target;
a vertical member 14 connected to an end of the horizontal member 12, extending in a height direction, and facing a side surface of the cross-section reducing member 30; and
One or more reinforcing members 16 having one end connected to the horizontal member 12 and the other end connected to the vertical member 14;
The vertical member 14 faces the cross section reducing member 30 and is connected to the cross section reducing member 30, and the horizontal member 12 faces the construction target surface and is connected to the construction target surface,
Installation structure of cross section reduction member of concrete structure.
The method of claim 4,
A first fitting fixing part 141 is provided at the upper end of the vertical member 14 to support the upper end of the cross section reducing member 30,
The first fitting fixing part 141 is:
a first horizontal portion 142 extending in a horizontal direction from the upper end of the vertical member 14 so as to come into contact with the upper end of the cross section reducing member 30; and
A first vertical portion 143 extending downward from the end of the first horizontal portion 142 to contact the opposite side surface of the cross section reducing member 30;
The width of the first fitting fixing part 141 corresponding to the longitudinal direction of the cross section reducing member 30 is equal to or greater than the width of the vertical member 14,
Section reduction member installation structure of concrete structure.
The method of claim 4,
At any point between the upper end and the lower end of the vertical member 14, one or more second fitting parts 146 supporting the middle part in the height direction of the cross section reducing member 30 are provided,
The second fitting fixing part 146 is:
a second horizontal portion 147 extending in a horizontal direction from the vertical member 14 so as to come into contact with a bottom portion of the fitting hole 31 provided in the cross section reducing member 30; and
A second vertical portion 148 extending downward from the end of the second horizontal portion 147 to contact the opposite side surface of the cross-section reducing member 30; includes,
The cross-section of the fitting hole 31 is equal to or larger than the cross-sectional shape of the second vertical portion 148,
Installation structure of cross section reduction member of concrete structure.
The method of claim 4,
The vertical member 14 is formed with a reducing member coupling hole 149 penetrating in the thickness direction,
Correspondingly, fastening holes are formed in the area of the cross section reducing member 30,
The vertical member 14 is connected to the cross-section reducing member 30 by the fixing member 80 penetrating the reducing member coupling hole 149 and the fastening hole,
Installation structure of cross section reduction member of concrete structure.
The method of claim 4,
Interposed between the horizontal member 12 and the surface to be constructed is a spacing member 70 for providing a gap between the horizontal member 12 and the surface to be constructed,
The fixing member 80 for fixing the horizontal member 12 to the surface of the construction target penetrates the spacing member 70 and connects the horizontal member 12 and the surface of the construction target,
Installation structure of cross section reduction member of concrete structure.
The method of claim 8,
The spacing member 70 includes a compressible material and has a polygonal cross-sectional shape,
Installation structure of cross section reduction member of concrete structure.
The method of claim 4,
The cross-sectional shape of the vertical member, horizontal member or reinforcing member is polygonal, circular, elliptical, or track-shaped,
The vertical member, horizontal member or reinforcing member is in the form of a solid column or hollow tube,
The material of the vertical member, horizontal member or reinforcing member includes any one of steel, wood, and resin material,
Installation structure of cross section reduction member of concrete structure.
The method of claim 1,
The cross section reducing member 30 is in the shape of a plate, and the material includes wood, plywood, plastic, rubber, and steel.
Installation structure of cross section reduction member of concrete structure.
A first step of erecting a cross section reducing member 30 having a cross section having a height greater than the thickness and extending in the longitudinal direction on the surface of the construction target, and covering the surface of the construction target and the cross section reducing member 30 with the waterproof paper 50. step;
Following the first step, a second step of connecting the section reducing member 30 and the fixing table 10 with the waterproof paper 50 interposed therebetween;
Following the second step, a third step of fixing the fixing table 10 to the surface of the construction target with the waterproof paper 50 interposed therebetween; and
Continuing to the third step, a fourth step of pouring concrete on the surface of the construction target in a state in which the fixing base 10 is embedded; including, a concrete structure construction method.
The method of claim 12,
The second step includes a step of spanning the first fitting fixing part 141 provided at the upper end of the fixing base 10 to the upper end of the cross section reducing member 30, the concrete structure construction method.
The method of claim 12,
The second step includes a step of inserting the second fitting fixing part 146 provided between the upper end and the lower end of the fixing table 10 into the fitting hole 31 provided in the cross section reducing member 30 and then spanning , Concrete structure construction method.
The method of claim 12,
The third step is a process of fixing the fixing base 10 and the surface to be constructed with the fixing member 80 in a state where the spacing member 70 is interposed between the waterproof paper 50 and the fixing base 10. Including, concrete structure construction method.
The method of claim 12,
Following the fourth step, a fifth step of forming a joint groove 99 at a position corresponding to the installation position of the cross section reducing member 30 on the top of the poured concrete before curing of the poured concrete is completed; further comprising How to construct a concrete structure.
The method of claim 16
The process of forming the joint groove 99 is the first step of cutting the joint groove 99 and then filling the joint member to finish, or inserting the temporary member 90 into the position where the joint groove 99 is to be formed. A concrete structure construction method comprising a second step of curing the concrete in one state, removing the temporary member 90, and filling the filling member to finish.
The method of claim 16
Before proceeding with the fifth step, the first to fourth steps are repeated two or more times.
The method of claim 12,
The surfaces to be constructed face each other while being spaced apart from each other,
A method of constructing a concrete structure in which the processes of the first to fourth steps are performed on each of the construction target surfaces.
The method of claim 12,
A formwork is placed away from the surface of the construction target and the process of the fourth step is performed in a state where the temporary member 90 is fixed to the formwork,
A concrete structure construction method comprising a third step of curing the concrete, removing the temporary member 90, and filling the filling member to finish.

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