KR100770764B1 - Repair method of concrete structure using planar heating element - Google Patents

Abstract

The present invention relates to a repair method for a concrete structure using a planar heating element, by actively utilizing a planar heating element that has good thermal efficiency and does not cause noise in order to cure the curable resin applied to the inner wall of a part or the entire repair of the damaged concrete structure. Not only does it significantly shorten the construction time, it also does not cause problems such as unnecessary noise.

In the present invention, when the concrete structure is a pipeline embedded in the basement, after coating the outer surface of the tubular resin absorbent material with a plastic film to prepare a lining material by impregnating the liquid curable resin in the resin absorbent material, the curable resin is Coating the planar heating element on the inner surface of the impregnated resin absorbent material; inverting and inserting the planar heating element coated lining material into the conduit by air pressure to adhere to the inner wall of the conduit; and applying power to the planar heating element to cure the curable resin. A step is made.

Description

PIPE REPAIR METHOD OF CONCRETE STRUCTURE USING FACE TYPE HEATING ELEMENT SHEET}

1 is a reference diagram for explaining a conventional repair method.

2 and 3 is a reference diagram for explaining the repair method of the present invention according to the first embodiment.

Figure 4 is an exploded perspective view showing a schematic configuration of the planar heating element in the present invention according to the first embodiment.

5 is a perspective view showing a resin absorbent of the present invention according to a second embodiment.

6 to 11 are a series of reference diagrams for explaining the repair method of the present invention according to the second embodiment.

12 is a reference view for explaining the repair method of the present invention according to the third embodiment.

* Description of the symbols for the main parts of the drawings *

100: planar heating element 110: insulator

120,150: heating element 130: electrode

131,132: power supply terminal 210: lining material

211: plastic film 213,310: resin absorbing material

215,330,415: thermosetting resin 320: repair member

The present invention relates to a repair method for a concrete structure, the construction time by actively utilizing a planar heating element that has good thermal efficiency and does not cause noise in order to cure the curable resin applied to the inner wall of the damaged concrete structure or partial repair The present invention relates to a method for repairing concrete structures using planar heating elements, which is suitably shortened and of course not causing problems such as unnecessary noise.

In general, there are various methods for repairing concrete structures, but the method of hardening and curing the curable resin on the surface of the concrete structure having a damaged part is relatively simple but has been widely used because of its excellent effect.

Referring to Figure 1 the repair method performed in the pipeline of the repair method of such a concrete structure as follows.

As shown, the conventional repair method is made by coating the outer surface of the tubular resin absorbent material 13 with the plastic film 11 and then impregnating the liquid curable resin 15 into the resin absorbent material 13. After the lining material 10 is prepared, the lining material 10 is reversely inserted into the pipe line P, and the curable resin 15 of the lining material 10 is cured.

At this time, in order to harden the curable resin 15, as shown in FIG. 1, the water (W) injected to reversely insert the lining material 10 into the pipe line P is heated to have the thermosetting characteristics. The method of hardening curable resin 15 is widely used.

On the other hand, in the case of injecting by pressing the air, not the water in order to invert the insertion of the lining material 10 into the pipe (P), the curable resin of the lining material 10 in a manner of showering hot water using a separate device (15) was cured.

However, according to the prior art, a separate boiler was used outside the pipe line P to prepare hot water used to cure the curable resin 15. However, due to the noise of the boiler being excessively high, It was difficult to carry out the pipeline repair work for a long time. In addition, there is a problem that the entire equipment is complicated and enlarged due to the need to provide a boiler.

In addition, there is a limit that takes a long time to heat a large amount of water (W) having a high specific gravity as described above to make hot water, thereby heating and curing the curable resin (15). Therefore, the construction time was long and caused a great burden in terms of manpower and cost.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, an object of the present invention is to use a planar heating element to actively use a planar heating element to cure the curable resin when repairing the concrete structure of the concrete structure To provide a repair method.

In order to achieve the above object, the repairing method of the concrete structure according to the technical idea of the present invention, in the repairing method for repairing by curing after applying the curable resin to the concrete structure, such as a pipeline or tunnel, heat generated when power is applied The planar heating element is brought into contact with or installed inside the curable resin applied to the inner wall of the concrete structure, and the curable resin is cured by heat generation of the planar heating element.

Here, the planar heating element is a pair of insulators having a planar shape so as to be in contact with the outside or inside of the curable resin, a heating element installed between the insulators and generates heat when power is applied, and is connected to the heating element to supply power It may be characterized by including a power supply terminal is authorized.

In addition, when the concrete structure is a pipeline embedded underground, coating the outer surface of the tubular resin absorbent material with a plastic film and then impregnating the liquid curable resin into the resin absorbent material to prepare a lining material, and the curable resin Coating the planar heating element on the inner surface of the resin absorbent material impregnated, inverting and inserting the planar heating element coated lining material into the conduit by pneumatic pressure, closely contacting the inner wall of the conduit, and supplying power to the planar heating element. It may be characterized in that it comprises a step of curing the curable resin by applying.

In addition, the pipe may be divided into a plurality of sections and each of the sections may be characterized in that each of the power supply terminals for applying power to the planar heating element.

In addition, if the concrete structure is a pipeline buried underground, preparing a repair member that is inflated by the elastic force to be restored to its original state after being inserted into the pipeline in the contracted state by rolling in a cylindrical shape and in close contact with the inner wall of the pipeline; And enclosing the planar heating element on the outside thereof in a state in which the repair member is rolled and contracted in a cylindrical shape, covering the outer surface of the planar heating element with a resin absorbent, and impregnating the resin absorbent with a curable resin; And inserting the repair member into the conduit in a state where the resin absorbent material is covered and the curable resin is coated and expanding the insulator to closely contact the inner wall of the conduit, and applying power to the planar heating element to cure the curable resin. It can be characterized in that.

In addition, the resin absorbent material has a circular tube shape, the width of the line in the width direction and the elastic circumferential blade line is woven orthogonal, stretchable in the circumferential direction, characterized in that the original width in the width direction to maintain can do.

In addition, the blade of the resin absorbent may be characterized in that any one of the stretch yarn, spandex and rubber yarn.

In addition, it is possible to continuously install a plurality of the repair member in a state in which the resin absorbent is covered and the curable resin is applied to the entire inner portion or the entire portion of the pipeline.

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

 The repairing method of the concrete structure according to the present invention is configured to actively use a planar heating element that has high thermal efficiency and hardly generates noise in order to harden the curable resin forming a shield layer by applying a damaged part. . However, the concrete structure as used herein includes all structures formed by concrete and similar materials such as pipelines, tunnels, walls of houses, box culverts, and the like. Most of the concrete structures as described above are often embedded in the basement or ground, so the temperature is low and the humidity is high, the environment was hard to harden the curable resin. The present invention is to actively utilize the planar heating element that can exhibit the best performance in such a harsh environment.

Hereinafter, the repair method of the concrete structure according to the present invention will be described in detail.

[First Embodiment]

2 and 3 are reference views for explaining the repair method of the present invention according to the first embodiment, Figure 4 is an exploded perspective view showing a schematic configuration of the planar heating element of the present invention according to the first embodiment.

As shown, the repair method according to the present invention is in contact with the lining material 210 by contacting the planar heating element 100 of the film form in close contact with the curable resin 215 constituting the lining material 210 Configure assemblies 100 and 210. Thus, after inserting the lining material assembly (100,210) as if the lining material 210 is inserted into the pipeline by using the conventional reversal insertion method as it is, the curable resin 215 can be simply cured by the planar heating element (100). It can be. If this is described in more detail as follows.

The repair method of the present invention includes a lining material preparation step, a planar heating element coating step, an insertion step in a line of the lining material assembly, and a curing step of the curable resin.

In the preparing of the lining material, the outer surface of the tubular resin absorbent material 213 is coated with the plastic film 211, and then the liquid curable resin 215 is impregnated into the resin absorbent material 213 to form the lining material 210. Prepare. In this case, the resin absorbent material 213 may be used as various materials as long as the resin absorbent material 213 has a property of absorbing and impregnating the curable resin 215 such as a nonwoven fabric, felt, and the like. On the other hand, the curable resin 215 has a thermosetting property that is cured when subjected to heat, unsaturated polyester, epoxy, vinyl polyester and the like can be used. And the material of the plastic film 211 is mainly used polyethylene, nylon, polyurethane and the like.

In the planar heating element coating step, the planar heating element 100 is coated on an inner surface of the resin absorbent 213 in which the lining material 210 is impregnated. The planar heating element 100 is in the form of a thin film, and may be used as long as it can cover the inner surface of the resin absorbent 213. Thus, when the planar heating element 100 is coated on the inner surface of the resin absorbent 213 to be in close contact with the curable resin 215 with high density, a sufficient heating area can be secured when the planar heating element 100 can be contacted with a wider area. It becomes possible. Thereby, the curable resin 215 can be actively heated and cured within a short time. Although the planar heating element 100 is partially torn or damaged, unlike the heating coil which is a linear heating element, there is little risk of electrical short-circuit, and even when used for a long time, the planar heating element 100 does not become inoperable due to oxidation due to contact with air. Thus, the planar heating element 100 has a high operating reliability even under adverse conditions. As the planar heating element 100, carbon black, metal, indium-tin oxide (ITO), and the like, which are widely used in the present invention, may be commercialized in the form of a film in the form of the heating elements 120 and 150.

In the present invention, the planar heating element 100 is a 'plane-shaped heat-producing object' having a concept contrasted with the linear heating element, one of the basic form is schematically shown in FIG.

The planar heating element 100 as described with reference to FIG. 4 has a pair of insulators 110 having a film-like surface shape so as to be in close contact with a large area to the object, and is installed between the insulators 110 to supply power. Heating elements 120 and 150 that generate heat when applied, and the heating elements 120 and 150 include power terminals 131 and 132 that are connected to each other via an electrode 130 to apply external power to the heating elements 120 and 150. In addition, the electrode 130 and the heating elements 120 and 150 include a conductive adhesive 140 for stably fixing the adhesive to the insulator 110. As the material of the insulator 110, polyester, polyester, polypropylene, polyvinyl chloride, etc. are mainly used as the polymer insulating member. In addition, polyamide, polyimide, polyurethane, epoxy, epoxy resin impregnated glass fabric, and teflon are used. , Mica and the like can be used. On the other hand, as the material of the heating elements (120,150), there are a variety of materials belonging to the metal heating element, non-metal heating element, other heating elements, while the heat and durability is strong, the thermal conductivity is low, but the use of a carbon material with a low coefficient of thermal expansion and light at present Seems desirable. The planar heating element 100 is expected to be developed in a more excellent form because the recent research is actively underway in various fields. Therefore, the present invention is not limited to adopting a planar heating element 100 of a more excellent form to be developed later. However, the above only mentioned the basic form of the planar heating element (100).

In the inserting step of the lining material assembly, the planar heating element 100 is covered with the lining material 210 and the lining material assemblies 100 and 210 formed in the pipeline are inverted in the conduit by air pressure through an air tube (not shown). Insert it. That is, the air A injected from the air supply nozzle 221 connected to the air compressor (not shown) installed outside is injected through the guide tube 223 to expand the air tube. Then, the lining material 210 having the end fixed to the inversion nozzle 225 due to the expansion of the air tube is gradually inverted and closely adhered along the inner wall of the pipe P together with the planar heating element 100.

Thereafter, the curable resin curing step is performed. In this step, power is applied to the planar heating element 100 to cure the curable resin 215 in close contact with the planar heating element 100 in the form of being coated on the inner wall of the pipe line P. In this case, the planar heating element 100 actively transmits high-temperature heat while being in intimate contact with the entire outer side of the curable resin 215 coated on the inner wall of the pipe P, thereby rapidly curing the curable resin 215. . This curing step of the curable resin is unnecessary compared to the conventional method of curing by hot water, and it is performed at a speed that is almost three times shorter because it is heated by a relatively high heat and is expensive to make hot water. Because no boiler is used at all, the equipment can be simplified and work can be carried out in a quiet way. In this case, when the section of the pipe P to be repaired is long, the inside of the pipe P is divided into a plurality of sections, and power terminals 131 and 132 are installed to apply power to the planar heating element 100 for each section. Then, the planar heating element 100 can be prevented in advance a problem that may not generate enough heat due to insufficient power supply.

Thereafter, the planar heating element 100 is separated from the curable resin 215 cured on the inner wall of the conduit P. As a result, the repair of the pipeline P is completed, and the plane heating element 100 separated can be reused for repair of the pipeline next. On the other hand, when the planar heating element 100 is installed in a form buried in the curable resin 215 without contacting the outer surface of the curable resin 215, the planar heating element 100 is separated from the cured resin 215 already cured. It is virtually impossible to do. However, the planar heating element 100 is not a big problem because the price is low. Therefore, what is necessary is just to leave as it is in the state provided in the said curable resin 215.

Next, the present invention according to the second embodiment will be described.

Second Embodiment

The second embodiment is also called reinforcement ring and is wound in a cylindrical shape and inserted into the conduit in a contracted state and then inflated by an elastic force to be restored to its original state. It shows that heating elements can be actively utilized. In addition, in the present invention according to the second embodiment, a resin absorber having a unique configuration is used together with the planar heating element. First, after explaining the configuration of the resin absorbent material, it will be described in detail for the repair method of the pipeline using them.

5 is a perspective view showing a resin absorbent of the present invention according to a second embodiment, Figures 6 to 11 is a series of reference diagrams for explaining the repair method of the present invention according to the second embodiment.

As shown, the resin absorbent material 310 of the present invention according to the second embodiment has a circular tube shape to be covered on the outside of the pipeline repair member 320. In addition, the resin absorbent material 310 is made of a fiber material to be impregnated after the curable resin 330 is applied. The resin absorbent material 310 is woven in the width direction of the seed line 311 and the stretchable circumferential blade line 313 perpendicular to each other. The blade line 313 woven in the circumferential direction is provided with any one of the stretch yarn, spandex and rubber yarn to stretch. Of course, the raw material of the blade 313 can be adopted as many other than the kind of the above-mentioned fibers, if it can be stretched while having a certain degree of elasticity. However, the seed line 311 is provided with a tough fiber without being stretched. 5 is a view illustrating an expanded state of the resin absorbent material 310, and it may be found that the spacing between the strings 311 is increased by a stretched blade 313 when expanded.

According to such a configuration, the resin absorbent material 310 is stretched and stretched in the circumferential direction without difficulty even when the repair member 320 is expanded, and maintains the original width in the width direction. In addition, since the resin absorbent material 310 is composed of a fiber material in which the seed wires 311 and the blade wires 313 are woven together, the resin absorbent material 310 may be impregnated with the curable resin 330 smoothly.

The following describes the repair method of the present invention according to the second embodiment.

 The repair method according to the second embodiment of the present invention first begins with preparing a conduit repair member 320 in a state of being rolled and contracted in a cylindrical shape as shown in FIG. 6, and surrounding the planar heating element 100 on the outside thereof. . At this time, the planar heating element is preferably provided with a size that is relaxed in preparation for when the repair member 320 is expanded.

Subsequently, as shown in FIG. 7, the outer side of the planar heating element 100 has a cylindrical shape as described above, and is installed by covering the resin absorbent material 310 that can be stretched only in the circumferential direction by the seed line 311 and the blade line 313.

Thereafter, as shown in FIG. 8, the curable resin 330 is uniformly coated on the resin absorbent material 310. Then, the curable resin 330 penetrates into the resin absorbent material 310 and is impregnated with stability.

Thereafter, as shown in FIG. 10, the repair member 320 is mounted on the outside of the expandable body 351 of the pipeline repair device 350, and then inserted into the pipe P requiring repair.

Thereafter, when the body 351 of the pipeline repair device 350 is expanded as shown in FIG. 11, the resin absorbent material 310 also extends in the circumferential direction while the repair member 320 expands. However, the resin absorbent material 310 does not increase in the width direction and maintains the original width width as it is, as shown in FIG. 9. As a result, the curable resin 330 coated on the resin absorbent material 310 to be impregnated closes the gap between the inner wall of the pipe P and the repair member 300.

Thereafter, the pipeline repair member 320 installed in close contact with the inner wall of the pipeline P is left as it is, and only the repair device 350 is contracted to remove the body.

Subsequently, if necessary, according to the same method as described above, the resin absorbent material 310 is covered with the entire portion or the entire portion of the pipeline P, and the repair member 320 in which the curable resin 330 is covered is continuously installed. . Then, a large area in the pipeline P can be repaired.

Thereafter, when power is applied to the heating elements 120 and 150 included in the planar heating element 100 through the power terminals 131 and 132 of the planar heating element 100, high temperature heat is generated in the heating elements 120 and 150. Then, the curable resin 330 in close contact with the planar heating element 100 receives the high temperature heat generated from the planar heating element 100 and cures in a short time. In this way, when the curable resin is cured, the repair of the pipeline P is completed.

Next, the present invention according to the third embodiment will be described. The third embodiment exemplifies a case where the repair target of the present invention is a two-arch tunnel.

Third Embodiment

12 is a reference view for explaining the repair method of the present invention according to the third embodiment.

As shown, the wall of the conventional tunnel 410 is composed of a shotcrete 420, a waterproof sheet 440, lining material 450 and the like. Among these, when the waterproof sheet 440 and / or the lining material 450 are damaged due to poor construction or vibration due to vehicle communication, groundwater flows out of the rock or when the ground is relaxed and left for a long time, to collapse risk. It leads.

Therefore, the repair method of the present invention by applying a thin coating or coating the curable resin 415 on the surface of the lining material 450, by installing a planar heating element 100 in close contact with the outer surface of the curable resin (415) Hardens quickly. Here, the repair by the curable resin 415 and the planar heating element 100 applied to the inner wall of the tunnel 410 is for the entire tunnel or a part of the section, and when the repair is completed, the planar heating element can be collected and used again later. Make sure

As such, the present invention can significantly shorten the time that the curable resin 415 is cured by using the planar heating element 100, so that it is possible to solve a large part of the problem or cost problem that the vehicle communication is interrupted for a long time due to the tunnel repair. do. For reference, in the related art, in order to cure the curable resin 415, it is left in a natural state for a few days, or in order to improve this, a plurality of fluorescent lamps are installed inside the tunnel 410 to use radiant heat. However, all of these had limitations in rapidly curing the curable resin.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. That is, the present invention can be widely used for repairing various concrete structures such as box culverts, houses as well as pipelines and tunnels buried underground. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the repair method of the concrete structure using the planar heating element according to the present invention, the construction time by significantly utilizing the planar heating element to harden the curable resin applied to the inner wall during partial or total repair of the concrete structure Of course, there is no problem due to unnecessary noise, etc.

In addition, the present invention does not require complicated and intractable expensive equipment, such as a boiler for preparing hot water, and the work itself is also very concise, reducing costs and improving work quality.

In addition, the present invention has excellent work reliability due to the characteristics of the planar heating element that operates even when partially damaged.

In addition, the present invention can be utilized in any place if the tunnel, box culvert, housing and concrete structures.

In addition, since the present invention follows a forced heating method using a planar heating element, a high curing effect can be expected even in an environment in which hardening of the curable resin is difficult, such as low temperature and high humidity because a structure to be repaired is buried underground or in the ground.

Claims (8)

In the repair method of applying the curable resin to the tubular concrete structure and curing and repairing it, when the concrete structure is a pipeline, Coating the outer surface of the tubular resin absorbent material with a plastic film, and then impregnating the liquid curable resin into the resin absorbent material to prepare a lining material; Coating the planar heating element on an inner surface of the resin absorbent material impregnated with the curable resin; Inverting and inserting the planar heating element-coated lining material into the conduit to closely contact the inner wall of the conduit; Repairing a concrete structure using a planar heating element comprising the step of applying power to the planar heating element to cure the curable resin. The planar heating element of claim 1, A pair of insulators having a planar shape so as to be in contact with outside or inside of the curable resin; A heating element installed between the insulators and generating heat when power is applied; Repair method of a concrete structure using a planar heating element, characterized in that configured to include a power terminal connected to the heating element to apply external power. delete The method of claim 1, The method of repairing a concrete structure using a planar heating element, comprising: dividing the inside of the pipe into a plurality of sections and installing power terminals for applying power to the planar heating element for each section. In the repair method of applying the curable resin to the tubular concrete structure and curing and repairing it, when the concrete structure is a pipeline, Preparing a repair member that is expanded by an elastic force intended to be restored to a state before being contracted after being inserted into the pipeline in a contracted and rolled state, and is in close contact with the inner wall of the pipeline; Surrounding the planar heating element on its outer side in a state in which the repair member is rolled and contracted in a cylindrical shape; Covering a resin absorbent on the outside of the planar heating element; Impregnating the resin absorbent with a curable resin; Inserting the water-retaining member into the conduit with the resin absorbent material covered and the curable resin overlaid and inflating the resin absorbing member to close the inner wall of the conduit; Repairing a concrete structure using a planar heating element comprising the step of applying power to the planar heating element to cure the curable resin. The method of claim 5, The resin absorbent material has a circular tube shape, and a string line in the width direction and a stretchable circumferential blade line are woven orthogonal to each other so that the resin absorbent material can be stretched only in the circumferential direction and not stretched in the width direction. Repair of concrete structures The method of claim 6, The blade of the resin absorbent material is a repair method of a concrete structure using a planar heating element, characterized in that any one of stretch yarns, spandex and rubber yarn. The method of claim 5, A repair method for a concrete structure using a planar heating element, characterized in that a plurality of the repair member in a state in which the resin absorbent is covered and the curable resin is applied to the entire inner portion or the entire section.

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