KR20200126592A - Concrete Column Structures Reinforcing Method Using Reinforced Steel Plate - Google Patents

Abstract

The present invention relates to a seismic, fireproof, repair, and reinforcement method for concrete column structure using socket anchors and reinforcement channels, which installs socket anchors and reinforcement channels on each side of a concrete column structure, reinforces the outer surfaces of the concrete column structure with external reinforcement steel plates, and couples bolts to the socket anchors to restrain the reinforcement channels and the external reinforcement steel plates with the socket anchors, thereby improving strength and stiffness and facilitating easier construction. The method comprises the steps of: (a) forming a U-shaped groove by cutting a predetermined section of a central part of each side of a concrete column structure to a predetermined depth in a width direction and cutting both sides of the cut section to a predetermined depth in the width direction; (b) forming anchor holes having a predetermined depth at longitudinal regular intervals in the central part of the U-shaped groove in the width direction; (c) inserting socket anchors into the anchor holes so that the other ends thereof protrude by a predetermined length; (d) filling the U-shaped groove with mortar and installing the socket anchors on the U-shaped groove so that the other ends thereof are inserted into through holes of reinforcement channels; (e) applying mortar to the outer surfaces of the concrete column structure; (f) installing successively a pair of external reinforcing steel plates having a [-shaped cross section on the concrete column structure at longitudinal regular intervals so that coupling parts thereof overlap each other on both sides of the concrete column structure to match coupling holes, forming overlapping sections, and the other ends of the socket anchors penetrate the coupling holes to expose ends of the socket anchor to the outside; and (g) fastening bolts to the socket anchors from the outside of the overlapping sections of the pair of external reinforcement steel plates.

Description

Concrete Column Structures Reinforcing Method Using Reinforced Steel Plate} of concrete column structures using socket anchors and reinforcing channels

The present invention relates to a seismic, fireproof, repair, and reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, and more particularly, a socket anchor and a reinforcing channel are installed on each side of the concrete column structure, and Concrete using socket anchors and reinforcing channels that reinforce the outer surface of the column structure and secure both the reinforcing channel and the external reinforcing steel plate with the socket anchor by bolting it to the socket anchor to ensure excellent strength and stiffness while making construction very easy. It relates to seismic, fireproof, repair, and reinforcement methods of column structures.

There was a problem in that the load-bearing capacity and durability were deteriorated due to deterioration due to the increase in the service life of the structure, neutralization of concrete due to the effects of disasters, delamination due to material separation, and generation of cracks due to structural causes.

In recent years, demands for seismic reinforcement of structures are increasing not only for structural repair and reinforcement due to increased strength of existing structures and deterioration of durability due to environmental problems, but also due to aging of structures or reinforcement of seismic regulations.

As a background technology of the present invention, there is Patent Registration No. 1618252 "Fiber Reinforced Plastic (FRP) Reinforcement Device and Reinforcement Method of Structure Using the Same" (Patent Document 1). In the background art, a FRP core 10 in which a plurality of fiber bundles 1 in the form of a roving are arranged and a resin is impregnated as a whole from one end to the other to have a bar shape; An anchor mount (20) in the form of a circular rod or polygonal rod formed by arranging a plurality of fiber bundles (1) in the form of roving and impregnating with resin, formed perpendicular to the FRP core (10); And an anchor 30 inserted and fixed together with the anchor mount 20 in a hole H formed in a structure to be reinforced by being a tubular body coupled to surround the outer surface of the anchor mount 20; The anchor 30 is a fiber reinforcement, characterized in that it is made of any one of a tubular body made of metal, a tubular body made by impregnating resin in a fiber bundle, and a tubular body made by rolling a composite material sheet containing fibers into a tubular shape. Using a plastic (FRP) reinforcing device, (a) spraying resin together with fibers on the surface of the structure to be reinforced to construct a first fiber reinforcement coating layer 50; (b) a structure reinforcement method comprising the step of covering the first fiber reinforcement coating layer 50 by inserting the anchor 30 of the fiber reinforced plastic (FRP) reinforcing device into the hole H of the structure Suggests.

However, the above background technology is to install a fiber-reinforced plastic (FRP) reinforcement device by spraying resin together with fibers on the surface of the structure. However, by applying it to the surface of the structure, it is susceptible to damage due to slip and impact from the external environment. there was.

Patent Registration No. 1618252 "Fiber-reinforced plastic (FRP) reinforcement device and reinforcement method of structure using the same"

The present invention is to solve the above problems, by installing socket anchors and reinforcing channels on each side of the concrete pillar structure, reinforcing the outer surface of the concrete pillar structure with an external reinforcing steel plate, and bolting the socket anchor to the socket anchor. Seismic, fireproof, repair, and reinforcement of concrete column structures using socket anchors and reinforcement channels that make the reinforcement channel and the external reinforcing steel plate constrained to enhance the adhesion performance while making the construction very easy. Its purpose is to provide a construction method.

The present invention comprises the steps of: (a) cutting a certain section of the central part in the width direction of each side of the concrete column structure to a certain depth and cutting both sides of the cut section in the width direction to a certain depth to form a U-shaped groove; (b) forming an anchor hole having a predetermined depth at a predetermined interval in the length direction in the central portion of the U-shaped groove in the width direction; (c) inserting a socket anchor, which is filled with a filler material from one end to the center in the shape of an empty tube and has a thread formed on the inner circumferential surface from the other end to the center, into the anchor hole so that the other end protrudes for a predetermined length; (d) A reinforcing channel consisting of a horizontal plane through which a through hole is drilled at regular intervals in the length direction and a support surface extending in a right angle direction from both sides of the horizontal plane in the width direction is filled with a mortar in the U-shaped groove, and a socket anchor is placed in the through hole of the reinforcing channel. Installing in the U-shaped groove so that the end is inserted; (e) applying mortar to the outer surface of the concrete pillar structure; (f) A pair of external reinforcing steel plates having a C-shaped cross section consisting of a reinforcement part in the shape of a certain length plate and a coupling part extending in a right angle direction from both ends of the reinforcement part and through a coupling hole at regular intervals in the longitudinal direction at the outer end. A pair of external reinforcing steel plates are placed at regular intervals in the length direction of the concrete column structure so that the other end of the socket anchor penetrates the coupling hole so that the end of the socket anchor is exposed to the outside so that the coupling holes are matched on both sides of the structure. Installing in succession; (g) Fastening bolts to socket anchors outside of the overlapping section of a pair of external reinforcing steel plates; seismic, fireproof, repair, and reinforcement methods of concrete column structures using socket anchors and reinforcing channels, comprising: Want to provide.

In addition, in step (c), the socket anchor has a plurality of slits formed at the other end thereof, and in step (g), the concrete using socket anchor and reinforcing channel is coupled so that the slit portion is opened when the bolt is fastened. To provide seismic, fireproof, repair, and reinforcement methods of column structures.

In addition, in step (c), the socket anchor is to provide a seismic, fireproof, repair and reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, characterized in that a rubber ring is formed on the inner circumferential surface on which the thread is formed.

In addition, in step (c), the socket anchor is to provide a seismic, fireproof, repair and reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, characterized in that the other end of the socket anchor is bent outward to form a flange portion. do.

In addition, in step (d), it provides a seismic, fireproof, repair, and reinforcement method for concrete column structures using socket anchors and reinforcing channels, characterized in that one or more reinforcing bars are formed on the rear surface of the horizontal plane of the reinforcing channel. I want to.

In addition, in step (d), the outer end of the support surface of the reinforcing channel is cut to have unevenness to form the unevenness, and seismic, fireproof, repair, and reinforcement methods of concrete column structures using socket anchors and reinforcing channels are used. I want to provide.

In addition, in step (d), a socket anchor, characterized in that a plurality of through holes are formed on the support surface of the reinforcing channel, and a seismic, fireproof, repair, and reinforcement method of a concrete column structure using a reinforcing channel.

In addition, in step (f), seismic, fireproof, repair, and reinforcement of concrete column structures using socket anchors and reinforcing channels, characterized in that the overlapping sections of a pair of vertically adjacent external reinforcing steel plates are positioned in a staggered direction. We want to provide a construction method.

In addition, in step (f), the outer reinforcing steel plate on the other side of the external reinforcing steel plate has a coupling jaw formed in the overlapping section so that its cross-section is extended to the outside, so that the inside of the coupling jaw is on the top of the coupling portion of the external reinforcing steel plate on one side. It is intended to provide a seismic, fireproof, repair, and reinforcement method of concrete column structures using socket anchors and reinforcing channels, characterized in that the surfaces are in close contact with each other.

In the seismic, fireproof, repair, and reinforcement method of a concrete column structure using the socket anchor and reinforcing channel of the present invention, socket anchors and reinforcing channels are installed on each side of the concrete column structure, and the outer surface of the concrete column structure is reinforced with an external reinforcing steel plate. It has a very useful effect of constraining both the reinforcing channel and the external reinforcing steel plate with the socket anchor by bolting it to the socket anchor so as to enhance the adhesion performance while making it excellent in strength and stiffness, and making the construction very easy.

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings. It is limited and should not be interpreted.
1 to 8 are cross-sectional views sequentially showing seismic, fireproof, repair, and reinforcement methods of a concrete column structure using a socket anchor and a reinforcing channel of the present invention.
9 is a partially exploded perspective view of FIG. 8 and a perspective view of a combined state.
10 is a perspective view of another embodiment of FIG. 9B.
11A is a perspective view and a cross-sectional view of the socket anchor of the present invention.
Figure 11b is a cross-sectional view of another embodiment of the socket anchor of the present invention.
12 is a perspective view of a reinforcing channel and various modifications of the present invention.
13 is a diagram showing an embodiment of a bolt used in the present invention.

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

Hereinafter, the technical configuration of the present invention will be described in detail according to a preferred embodiment.

1 to 8 are cross-sectional views sequentially showing seismic, fireproof, repair, and reinforcement methods of a concrete column structure using the socket anchor and reinforcing channel of the present invention, and FIG. 9 is a partial exploded perspective view of FIG. It is a perspective view.

The seismic, fireproof, repair, and reinforcement methods of a concrete column structure using a socket anchor and a reinforcing channel of the present invention will be described in detail in order of construction with reference to the drawings.

The seismic, fireproof, repair, and reinforcement method of a concrete pillar structure using the socket anchor and reinforcing channel of the present invention first, as shown in FIG. 1, a certain section of the central part in the width direction of each side of the concrete pillar structure 10 to a predetermined depth. The U-shaped groove 11 is formed by cutting and cutting both sides in the width direction of the cut section to a predetermined depth (a).

U-shaped grooves 11 are formed on each side of the concrete column structure 10 to perform work to reinforce each side. The U-shaped groove 11 is formed in the entire length direction in a certain section of the central portion in the width direction of each side of the concrete column structure 10, and such a U-shaped groove 11 is a reinforcing channel in step (d) to be described later ( It is configured to attach 30).

The shape of the U-shaped groove 11 is formed in the same shape as the shape of the reinforcing channel 30 by cutting a certain section of the central part in the width direction of each side of the concrete column structure 10 to a certain depth to the horizontal plane of the reinforcing channel 30 ( 31) is prevented from further protruding from the outer surface of the concrete column structure 10 to the outside, and cutting both sides in the width direction of the cut section to a predetermined depth so that the support surface 32 of the reinforcing channel 30 can be inserted. A U-shaped groove 11 is formed.

At this time, the U-shaped groove 11 may be formed to be larger than the size and thickness of the reinforcing channel 30 to form a space for filling the mortar 13.

Thereafter, as shown in FIG. 2, an anchor hole 12 having a predetermined depth is formed at a predetermined interval in the length direction in the central portion in the width direction of the U-shaped groove 11 (b).

The anchor hole 12 allows the socket anchor 20 to be inserted, and is formed to a predetermined depth according to the length of the socket anchor 20 so that the socket anchor 20 can be inserted.

Thereafter, as shown in FIG. 3, the socket anchor 20 is inserted into the anchor hole 12 to temporarily couple the socket anchor 20 (c).

The socket anchor 20 may be re-installed by removing the socket anchor 20 as necessary when installing the reinforcing channel 30 in a step to be described later by fixing only the position without a separate coupling means.

Figure 11a is a perspective view and a cross-sectional view of the socket anchor of the present invention, Figure 11b is a cross-sectional view of another embodiment of the socket anchor of the present invention.

As shown in Fig. 11a (b), the socket anchor 20 is a tube shape with an empty inside so that a variety of known fillers 121 such as epoxy are filled from one end to the center, and threads are on the inner circumferential surface from the other end to the center. So that it is formed, the bolts are easily combined.

Such a socket anchor 20 is inserted into the anchor hole 12 so that the other end of the socket anchor 20 protrudes from the anchor hole 12 for a predetermined length, and in the step described later, a reinforcing channel by the socket anchor 20 (30) make it possible to combine.

In particular, as shown in Fig. 11a(a), the socket anchor 20 has a plurality of slits 26 formed at the other end, so that the slit 26 portion is formed when the bolt 50 is fastened in step (g). It is possible to increase the coupling force by allowing them to be coupled so that they are wider, and as shown in FIG. 11B, the socket anchor 20 has a rubber ring 27, preferably an inelastic rubber ring, formed on the inner circumferential surface where the thread is formed, so that the bolt 50 is fastened. You can increase the cohesion of the city.

In addition, as shown in FIG. 11 (b) c, the socket anchor 20 has a flange portion 28 that extends by bending the other end outward, so that the flange portion 28 when the socket anchor 20 is installed. ), the inner side of the outer reinforcing steel plate 40, 40' can be prevented from being separated from the outer reinforcing steel plate 40, 40'.

Thereafter, as shown in FIGS. 4 and 5, the reinforcing channel 30 is installed in the U-shaped groove 11 (d).

12 is a perspective view of a reinforcing channel and various modifications of the present invention.

As shown in FIG. 12A, the reinforcing channel 30 includes a horizontal surface 31 through which the through hole 311 passes at regular intervals in the length direction and a support surface 32 extending in a right angle direction from both sides in the width direction of the horizontal surface 31. Done.

The through hole 311 is configured to match the spacing of the anchor hole 12, and the U-shaped groove 11 and the anchor hole 12 and the outside of the socket anchor 20 to install the reinforcing channel 30 A mortar 13 such as an epoxy mortar is injected between the surfaces, and a reinforcing channel 30 is installed.

At this time, the other end of the socket anchor 20 is inserted into the through hole 311 of the reinforcing channel 30 so that the outer end of the socket anchor 20 is exposed to the outside. In this case, the socket anchor 20 may be configured to further protrude outward at a portion where the position of the overlapping section (d) of the external reinforcing steel plates 40 and 40 ′ is formed.

In this way, the other end of the socket anchor 20 is inserted into the through hole 311 of the reinforcing channel 30 so that the reinforcing channel 30 is coupled to the concrete column structure 10 with the socket anchor 20, The reinforcing channel 30 can be stably installed in the U-shaped groove 11.

In particular, the reinforcing channel 30, as in Fig. 12b, and, in step (d), one or more reinforcing bars 60 are configured in the longitudinal direction on the rear surface of the horizontal surface 31 of the reinforcing channel 30, It may be positioned inside the mortar 13 between the reinforcing channel 30 and the outer surface of the U-shaped groove 11 to serve as a reinforcing bar.

In addition, as in Fig. 12c, the outer end of the support surface 32 of the reinforcing channel 30 is cut to have irregularities so that the irregularities 321 are formed or, as in Fig. 12d, the support of the reinforcing channel 30 A plurality of through-holes 322 are formed on the surface 32 so as to resist the shear force of the mortar 13 when inserted into the U-shaped groove.

Thereafter, as shown in FIG. 6, the mortar 13 is applied to the entire outer surface of the concrete column structure 10 (e).

Such work is to fill the gap between the external reinforcing steel plates 40 and 40 ′ and the outer surface of the concrete pillar structure 10 and attach the external reinforcing steel plates 40 and 40 ′ to the concrete pillar structure 10. Proceed.

Thereafter, as shown in FIGS. 7 and 9, a plurality of external reinforcing steel plates 40 and 40 ′ are installed so as to be continuous in the longitudinal direction of the concrete column structure 10 (f).

As shown, the external reinforcing steel plates 40 and 40 ′ extend in a right angle direction from both ends of the reinforcing part 41 and the reinforcing part 41 in the shape of a certain length plate, and the coupling holes at the outer ends at regular intervals in the longitudinal direction. Consisting of a coupling portion 42 formed through a through hole 421 to have a C-shaped cross section, a pair of external reinforcing steel plates 40 and 40 ′ are inserted and coupled at both sides of the concrete column structure 10, respectively, At this time, the pair of external reinforcing steel plates 40 and 40 ′ overlap the coupling portion 42 in the concrete column structure 10 to form an overlapping section d.

At this time, the overlapping section (d) is such that the coupling holes 421 and 421 of the coupling portion 42 of the external reinforcing steel plates 40 and 40 ′ on both sides are matched, and the other end of the socket anchor 20 The end of the socket anchor 20 is exposed to the outside through the coupling holes 421 and 421, and the reinforcing channel 30 and a pair of external reinforcing steel plates 40, 40' with the socket anchor 20 It plays the role of binding and binding at the same time.

Such a pair of vertically adjacent external reinforcing steel plates 40 and 40' may be installed so that the overlapping section d is aligned in the vertical direction, as in FIG. 9, and vertically adjacent, as in FIG. The overlapping section (d) of the pair of external reinforcing steel plates 40 and 40 ′ is configured to be positioned in a staggered direction, so that the strength of the coupling portion may be increased.

Finally, as in FIGS. 8 and 9, the bolt 50 is fastened to the socket anchor 20 from the outside of the pair of external reinforcing steel plates 40 and 40' overlapping section d (g ).

In this way, by fastening the bolt 50 to the socket anchor 20 exposed to the outside of the pair of external reinforcing steel plates 40 and 40 ′ overlapping section d, the socket anchor 20 The socket anchor 20 can be extended and coupled by the bolt 50 while simultaneously penetrating the through hole 311 of 30) and the coupling hole 421 of the pair of external reinforcing steel plates 40 and 40'. To be.

In addition, the outer reinforcing steel plate 40' on the other side of the external reinforcing steel plates 40 and 40' has a coupling jaw 48 formed in the overlapping section (d) so that its cross-section extends to the outside. A phenomenon in which the inner surface of the coupling jaw 48 is in close contact with the upper portion of the coupling portion 42 of the reinforcing steel plate 40 so that the inner surface of the concrete column structure 10 is excited due to the overlapping of the coupling portion 42 You can also try to prevent it.

13 is a diagram showing an embodiment of a bolt used in the present invention.

The bolt 50 used herein may be a variety of known bolts, and in the present invention, as shown in FIG. 13, in particular, a headless bolt made of only a body without a head is used, so that the external reinforcing steel plates 40 and 40 ′ ), the bolt 50 may not protrude outward.

In the seismic, fireproof, repair, and reinforcement method of a concrete column structure using the socket anchor and reinforcing channel of the present invention as described above, socket anchors and reinforcing channels are installed on each side of the concrete column structure, and the external reinforcing steel plate is used to the outside of the concrete column structure. By reinforcing the surface and bolting to the socket anchor, both the reinforcing channel and the external reinforcing steel plate are constrained by the socket anchor so that the adhesion performance is enhanced, while the strength and rigidity are excellent, and the construction is very easy. .

Until now, the present invention has been described in detail with reference to the presented embodiments, but those of ordinary skill in the art can make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such modifications and variations of the invention, but is limited by the claims appended below.

10: concrete column structure
11: U-shaped groove
12: anchor hole
121: filler
13: mortar
20: socket anchor
30: reinforcement channel
31: horizontal plane
311: through hole
32: support surface
40, 40': external reinforcement plate
41: reinforcement part
42: coupling hole
421: coupling hole
50: bolt
60: rebar
d: overlapping section

Claims (9)

(a) forming a U-shaped groove 11 by cutting a certain section of the central part in the width direction of each side of the concrete column structure 10 to a certain depth and cutting both sides of the cut section in the width direction to a certain depth;
(b) forming an anchor hole 12 having a predetermined depth at regular intervals in the longitudinal direction at the central portion in the width direction of the U-shaped groove 11;
(c) Anchor hole 12 so that the inner circumference of the socket anchor 20 is filled with a filler 121 from one end to the center in a hollow tube shape, and a thread is formed on the inner circumferential surface from the other end to the center. Inserting in );
(d) A reinforcing channel 30 consisting of a horizontal surface 31 through which the through hole 311 passes through at regular intervals in the length direction and a support surface 32 extending in a right angle direction from both sides in the width direction of the horizontal surface 31, U Filling the mortar 13 in the groove 11 and installing the other end of the socket anchor 20 into the through hole 311 of the reinforcing channel 30 in the U-shaped groove 11;
(e) applying a mortar 13 to the outer surface of the concrete pillar structure 10;
(f) a fixed length plate-shaped reinforcing portion 41 and a coupling portion 42 extending in a right angle direction from both ends of the reinforcing portion 41 and having coupling holes 421 through the outer ends at regular intervals in the longitudinal direction. A pair of external reinforcing steel plates 40 and 40 ′ having a C-shaped cross section,
The coupling portion 42 is overlapped so that the coupling holes 421 and 421 at both sides of the concrete column structure 10 are matched to form an overlapping section (d), and the other end of the socket anchor 20 is a coupling hole 421 Installing a pair of external reinforcing steel plates 40 and 40' in succession at regular intervals in the length direction of the concrete column structure 10 so that the ends of the socket anchors 20 are exposed to the outside through 421;
(g) fastening the bolt 50 to the socket anchor 20 from the outside of the pair of external reinforcing steel plates 40 and 40 ′ of the overlapping section d; a socket anchor comprising: And seismic, fireproof, repair and reinforcement methods of concrete column structures using reinforcing channels. The method according to claim 1,
In step (c),
The socket anchor 20 has a plurality of slits 26 formed at the other end thereof,
In step (g),
A seismic, fireproof, repair, reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, characterized in that the bolt 50 is coupled so that the slit 26 part is opened when fastening. The method according to claim 1,
In step (c),
The socket anchor 20 is a seismic, fireproof, repair, reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, characterized in that a rubber ring 27 is formed on the inner circumferential surface of which the thread is formed. The method according to claim 1,
In step (c),
Socket anchor 20 is a seismic, fireproof, repair, reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, characterized in that the other end is bent outwardly formed with a flange 28. The method according to claim 1,
In step (d),
A seismic, fireproof, repair, reinforcement method of concrete column structures using socket anchors and reinforcing channels, characterized in that one or more reinforcing bars 60 are configured in the longitudinal direction on the rear surface of the horizontal surface 31 of the reinforcing channel 30. The method according to claim 1,
In step (d),
The outer end of the support surface 32 of the reinforcing channel 30 is cut to have unevenness and the uneven part 321 is formed. The seismic, fireproof, repair, and reinforcement of a concrete column structure using a socket anchor and a reinforcing channel Method. The method according to claim 1,
In step (d),
A seismic, fireproof, repair, reinforcement method of a concrete column structure using a socket anchor and a reinforcing channel, characterized in that a plurality of through holes 322 are formed in the support surface 32 of the reinforcing channel 30. The method according to claim 1,
In step (f),
A seismic, fireproof, and fireproof concrete column structure using a socket anchor and a reinforcing channel, characterized in that the overlapping section (d) of a pair of vertically adjacent external reinforcing steel plates 40, 40' is positioned in a staggered direction. Repair and reinforcement method. The method according to claim 1,
In step (f),
Of the external reinforcing steel plates 40 and 40 ′, the external reinforcing steel plate 40 ′ on the other side has a coupling protrusion 48 formed in the overlapping section (d) so that its cross section is extended to the outside, and the external reinforcement steel plate on one side A seismic, fireproof, repair, reinforcement method of concrete column structures using socket anchors and reinforcing channels, characterized in that the inner surface of the coupling jaw 48 is in close contact with the upper portion of the coupling portion 42 of (40).

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