KR20220115506A - Adhesive liner for partial repair and reinforcement in the underground pipe and Non-excavation partial repair method using adhesive liner for partial repair and reinforcement in the underground and hybrid photo transformation - Google Patents

Abstract

The present invention relates to a trenchless partial repair and reinforcement method using an underwater adhesive liner for underground pipeline partial repair and reinforcement and a hybrid hardening method, which improves workability, comprising the steps of: preparing an underwater adhesive liner for underground pipeline partial repair and reinforcement; lining an underwater adhesive layer; cooling the underwater adhesive liner for underground pipeline repair and reinforcement; and attaching an inner surface of an underground pipeline while hardening the underwater adhesive layer of the underwater adhesive liner for underground pipeline partial repair and reinforcement.

Description

Adhesive liner for partial repair and reinforcement in the underground pipe and Non-excavation partial repair method using adhesive liner for partial repair and reinforcement in the underground and hybrid photo transformation}

The present invention relates to partial repair and reinforcement of an underground conduit, and more particularly, when there is local damage to an underground conduit, only the damaged part is repaired without targeting the entire underground conduit, and the liner is adhered to the inner surface of the underground conduit for construction strength It relates to a non-excavated partial repair and reinforcement method using a hybrid curing method and an underwater adhesive liner for partial repair and reinforcement of underground pipelines.

This section provides background information related to the subject matter of the present application and is not necessarily prior art.

In general, a pipe is a pipe for moving drinking water (water supply pipe), sewage (sewer pipe), rainwater (rainwater), sewage, etc., and is a structure that is installed underground.

These pipelines are buried for a long time and age, or cracks occur due to ground subsidence or ground movement, and fluid leakage and penetration of groundwater through cracks require repair and replacement of pipelines. Since cost and time are consumed, a method of repairing pipelines instead of replacing them by excavation is mainly developed and used.

As a conventional pipeline repair method, there is a non-excavated pipeline repair method.

In this non-excavated pipeline repair method, after inserting a repair tube (cured resin) into the pipeline to be repaired, the repair tube is expanded to adhere to the inner wall of the pipeline, and a medium (UV or heat) for curing the cured resin in the repair tube. ) to harden the repair tube on the inner wall of the pipeline.

This non-excavation pipeline repair method is divided into partial repair and total repair according to the degree of damage to the pipeline. Partial repair is to line a part of the pipeline with repair tubes, and complete repair is to line the entire pipeline with repair tubes.

Registered Patent No. 10-2082180 discloses a curing module for curing a cured resin through UV, including a UV module; first and second heads connected to both sides of the UV module in the longitudinal direction; a cooling tube having both sides in the longitudinal direction connected to the first and second heads while covering the periphery of the UV module to create a cooling space in the periphery of the curing module; an expansion tube in which both sides of the cooling tube in the longitudinal direction are connected to the first and second heads to form a closed space around the UV module together with the first and second heads; an air injector for expanding the expansion tube by injecting air into the expansion tube, or for contracting the expanded expansion tube by discharging air; A tube impregnated with a cured resin is coupled to the circumference of the expansion tube so as to be separated from the expansion tube and is expanded to adhere to the inner wall of the underground pipeline through the expansion of the expansion tube, while the cured resin is cured by the UV module to It includes a repair tube lined with the pipeline, and it is only a method of maintaining the repair tube in a tubular expanded state through curing of photocurable resin, and water flowing along the underground pipeline because there is no adhesive relationship between the repair tube and the underground pipeline There is a problem of exposing the damaged part while moving downstream by the In addition, a gap is generated between the repair tube and the underground pipeline, and water and foreign substances penetrate into the gap, which may cause a bad odor and cause damage to the repair tube.

Registered Patent No. 10-2082180

The present invention is to solve the above-described problems, and when there is local damage to the underground pipe, only the damaged part is repaired without targeting the entire underground pipe, and the liner is adhered to the inner surface of the underground pipe with adhesive force to drop the liner The purpose of this is to provide a non-excavated partial repair and reinforcement method using a hybrid curing method and an underwater adhesive liner for partial repair and reinforcement of an underground pipeline that generates adhesive strength using water flowing along the underground pipeline.

The non-excavation partial repair and reinforcement method using the underwater adhesive liner for partial repair and reinforcement of the underground pipeline according to the present invention and the hybrid curing method is an impregnated sheet cut to a size for partial repair of the underground pipeline at the periphery of the expandable photocurable packer A first step of preparing an underwater adhesive liner for repairing and reinforcing a part of an underground pipeline by wrapping and bonding the reinforcing sheet and applying an underwater adhesive means to the outer surface of the reinforcing sheet to form an underwater adhesive layer; a second step of inserting the expandable photocurable packer and the underwater adhesive liner for partial repair and reinforcement of the underground pipeline into the underground pipeline and moving it to a partial repair position after watering the upstream side of the underground pipeline; Expanding the expandable photocurable packer to form the impregnated sheet and the reinforcing sheet of the underwater adhesive liner for partial repair and reinforcement of the underground pipeline in a tubular shape, and a third lining of the underwater adhesive layer by the underwater adhesive means on the inner surface of the underground pipeline step; a fourth step of curing by irradiating UV to the underwater adhesive liner for repair and reinforcement of the underground pipeline part through the expandable photocuring packer; a fifth step of cooling the underwater adhesive liner for repair and reinforcement of the underground pipeline; a sixth step of shrinking the expandable photocurable packer and then recovering it to the ground; A seventh step of adhering to the inner surface of the underground pipeline while curing the underwater adhesive layer of the underwater adhesive liner for repair and reinforcement of the underground pipeline part through water flowing through the underground pipeline by allowing water to pass through the upstream side of the underground pipeline characterized.

According to the non-excavated partial repair and reinforcement method using the underwater adhesive liner for partial repair and reinforcement of the underground pipeline according to the present invention and the hybrid curing method, if there is a local damage to the underground pipeline, repair only the damaged part without targeting the entire underground pipeline Thus, it can be repaired at a lower cost compared to the overall repair, and the liner is constructed with a photocurable resin and photocuring method to repair and reinforce the underground pipeline through great rigidity. By preventing drop-off, the damaged part is maintained in a repaired and reinforced state, thereby preventing defects and improving reliability. In particular, there is a very good workability effect by generating adhesive force through water flowing along an underground pipe through a photocuring method, which is a curing method of the liner, and another underwater curing method, and adhesively fixing it to the underground pipe.

Further, since a gap is not formed between the underground pipe and the liner, it is possible to prevent water and foreign substances from penetrating and stagnation in the gap, thereby reducing odor and extending the lifespan of the liner.

1 is a perspective view showing a cross-section of an underwater adhesive liner for partial repair and reinforcement of an underground pipeline according to the present invention.
Figure 2 is a manufacturing process diagram of the underwater adhesive liner for partial repair and reinforcement of the underground pipeline according to the present invention.
Figure 3 is a manufacturing completeness of the underwater adhesive liner for partial repair and reinforcement of the underground pipeline according to the present invention.
Figure 4 is an exemplary view of a supply device for the construction site manufacturing of the underwater adhesive liner for partial repair and reinforcement of the underground pipeline according to the present invention.
Figure 5 is an exemplary view in which the underwater adhesive liner for repair and reinforcement of the underground pipeline part according to the present invention is stored in the storage box of the factory-produced product.
Figure 6 is an exemplary view of winding the underwater adhesive liner for partial repair and reinforcement of the underground pipeline according to the present invention on the expandable photocurable packer.
7 to 11 are non-excavated partial repair and reinforcement process diagrams using a hybrid curing method and an underwater adhesive liner for partial repair and reinforcement of underground pipelines according to the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

The underwater adhesive liner for partial repair and reinforcement of underground pipelines according to the present invention and the underwater adhesive liner for partial repair and reinforcement of underground pipelines applied to the non-excavation partial repair and reinforcement method using the hybrid curing method will be first described as follows.

As shown in FIG. 1 , the underwater adhesive liner 10 for partial repair and reinforcement of an underground pipeline according to the present invention is a repair that is impregnated with a photocurable resin from the inside through which water passes, based on the state constructed in the underground pipeline. The reinforcing impregnated layer 11 - the reinforcing layer 12 - consists of a layered structure of the underwater adhesive layer (13).

The repair-reinforcement impregnated layer 11 is made of fibers and a photocurable resin.

The fiber is preferably glass fiber, and for example, is manufactured by laminating a glass fiber mat in the form of chop and woven and quilting with fiber yarn (for example, polyester fiber yarn).

The reason for quilting with fiber yarn after laminating the glass fiber mat is that when the glass fiber mat is laminated and integrated with an adhesive, the adhesive melts depending on the composition of the photocurable resin, making it difficult to maintain the composite mat shape. This is to prevent, that is, the present invention is to quilt the polyester fiber yarn in order to maintain the mat shape when the composite mat is impregnated with a photocurable resin to wind or pull the repair and reinforcement impregnation layer.

The repair and reinforcing impregnation layer 11 is not limited to glass fiber, but any fiber that can be impregnated with a photocurable resin and lined according to the shape of an underground pipeline is possible, and also a photocurable resin and a thermosetting resin can be replaced

The repair and reinforcement impregnation layer 11 is preferably manufactured in a prepreg roll type and cut to fit the size of the underground pipeline.

The reinforcing layer 12 is a material capable of absorbing the photocuring resin of the repair and reinforcement impregnation layer 11 on the inside and absorbing the underwater adhesive means (underwater mortar or underwater adhesive) of the underwater adhesive layer 13 on the outside. A nonwoven fabric is preferable, and through this function, the repair and reinforcement impregnation layer 11, the reinforcing layer 12, and the underwater adhesive layer 13 are integrated with a strong bonding strength.

The repair and reinforcing impregnated layer 11 and the reinforcing layer 12 are not limited to specific values and may be implemented through a liner commonly used in this field.

The underwater adhesive layer 13 is formed on the outside of the reinforcing layer 12 and is in contact with the underground pipe and is adhered to the inner surface of the underground pipe through self-adhesive force.

The underwater adhesive layer 13 is used according to the material of the underground pipeline, for example, in the case of a concrete pipeline, an underwater hardening mortar is used, and in the case of a plastic or FRP pipeline, an underwater adhesive is used.

The water-hardened mortar is based on mixing water-hardened cement and water. In this case, 60-70 wt% of cement and 30-40 wt% of water are mixed with respect to 100 wt% of the water-hardened mortar.

The cement is a material for adhesion to the underground pipeline, and if it is out of the above ratio, the adhesion is weak or the workability is poor due to excessive adhesion. In addition, the cement does not cause rapid hardening, because when it hardens after application, it cannot exhibit adhesion to the underground pipeline. For example, the curing time is set to 30 minutes.

A retarder may be used so that the cement hardens with the liner 10 installed in the partial repair position.

The water is for the work of the cement, and if it is out of the above ratio, the workability is poor or the binding of the cement is weak because it is too thin.

In addition, in order to prevent the photocurable resin of the repair and reinforcement impregnation layer 11 from being cured by the penetration of natural light during the storage process of the liner 10 and the construction preparation process, a sunscreen agent may be further included, and 100 wt% of water-curing mortar 60-70% by weight of cement, 26-36% by weight of water, and 2-10% by weight of sunscreen.

The sunscreen is a powder, and inorganic zinc oxide, titanium dioxide, etc. can be used alone or in combination.

The underwater adhesive consists of a composition of a water-curable adhesive and water or a water-curable adhesive and water and a sunscreen, and their mixing ratio is 60 to 60% by weight, 30 to 40% by weight, or 60 to 70 based on 100% by weight of the total. % by weight, 26 to 36% by weight, 2 to 10% by weight.

Here, the sunscreen is the same as described above.

The formation method of the underwater adhesive layer 13 is possible by applying an underwater curing mortar or underwater adhesive to the outer surface of the reinforcing layer 12 using a brush or roller or spraying it with a spray, and it does not cure until it comes into contact with water. It does not cause a problem during the construction of the liner 10 and is adhered to the underground pipeline while being cured by contact with water.

The thickness of the underwater adhesive layer 13 is preferably 3 mm to 20 mm, and of course it is not limited to this value.

The underwater adhesive liner 10 for partial repair and reinforcement of the underground pipeline according to the present invention is preferably in the form of a prepreg sheet, and its manufacturing method is, for example, as shown in FIG. A method of overlapping the impregnated sheet 11-1 and the reinforcing sheet 12-1 for forming the reinforcing layer 12 while supplying them vertically is possible, and the impregnated sheet 11-1 and the reinforcing sheet 12-1 are available. ) may be supplied by being wound in a roll form, respectively.

In addition, it is possible to heat-seal both sides of the UV blocking sheets 14-1 and 14-2 while supplying the UV blocking sheets 14-1 and 14-2 to both upper and lower sides to be integrated.

Here, the impregnated sheet 11-1 and the reinforcing sheet 12-1 are the impregnated sheet 11-1 and the reinforcing sheet 12-1 with the UV blocking sheets 14-1 and 14-2 so as not to be heat-sealed. It is preferable to prepare more widely so that only the UV blocking sheets 14-1 and 14-2 are fused.

Figure 4 is an exemplary view showing a supply device for the construction site manufacturing of the underwater adhesive liner for repair and reinforcement of the underground pipe part according to the present invention, the inside has a space (can be divided up and down) and a draw-out that communicates with the outside is included The cabinet 20 and the cabinet 20 are respectively rotatably installed along the longitudinal direction so that the impregnated sheet 11-1 and the reinforcing sheet 12-1 are wound in a roll form, respectively, and a manual handle or an electric motor It includes a seat holder (21, 22) that rotates through.

Using such a supply device, the impregnated sheet 11-1 and the reinforcing sheet 12-1 may be continuously supplied at the job site and manufactured as described above.

5 is an exemplary view in which the underwater adhesive liner for repair and reinforcement of the underground pipeline part according to the present invention is stored in a storage box, and the liner 10 manufactured in a long length through this method is provided on both sides for UV protection After the ends are sealed (fused, etc.), as shown in FIG. 5, they are folded in a zigzag form and stored in the storage box 30, cut to the required length at the construction site, and the UV blocking sheets 14-1 and 14-2 are removed and used. do. The impregnated sheet 11-1 and the reinforcing sheet 12-1 are not adhered to each other and are accommodated in the UV blocking sheets 14-1 and 14-2.

In order to line the underwater adhesive liner 10 for partial repair and reinforcement of the underground pipeline according to the present invention to the underground pipeline, the process of installing the liner 10 in the underground pipeline and the process of forming the underwater adhesive layer 13 are required.

The liner 10 is constructed through an expandable photocurable packer for irradiating UV for photocuring and making the liner 10 into a tubular shape.

The expandable photocuring packer 100 is connected to both sides of the UV lamp 10 in the longitudinal direction of the UV lamp 10 for curing the resin through UV, and the first and second lamp holders 20- 1, 20-2), the first and second heads 30 and 40 that move along the inner wall of the underground pipeline and support the first and second lamp holders 20-1 and 20-2, face the inner peripheral surface of the underground pipeline It has a structure with an open part so that compressed air and UV can pass toward the periphery of the frame 50, and both sides in the longitudinal direction are connected to the first and second heads 30 and 40, respectively. 2 It is fixed to the periphery of the lamp holder (20-1, 20-2) to create a waterproof atmosphere sealed with the outside at the periphery of the UV lamp 10, and a waterproof tube 60 that can expand and contract, the first head ( 30) and includes a composite connector consisting of a power connector for applying power to the UV lamp 10 and an air connector for supplying compressed air in the waterproof tube 60, wherein the air connector is the power supply It has a double structure with a space through which compressed air passes at the periphery of the connector, so that the power connector is protected inside the air hose connected to the air connector.

The impregnated sheet 11-1 is wound around the periphery of the expandable photocurable packer 100, and the reinforcing sheet 12-1 is wound around the periphery of the impregnated sheet 12-1.

The expandable photocurable packer 100 should be inserted into the underground pipe in a contracted state smaller than that of the underground pipe, but the impregnated sheet 11-1 and the reinforcing sheet 12-1 are sized to cover all of the inner circumferential surface of the underground pipe, so the impregnated sheet 11 -1) and the reinforcing sheet 12-1 should be wound to overlap both ends.

After winding up to the reinforcing sheet 12-1, an underwater hardening mortar or an underwater adhesive is applied to the outer surface of the reinforcing sheet 12-1 to form the underwater adhesive layer 13.

The underwater adhesive layer 13 is capable of both targeting the entire outer surface of the reinforcing sheet 12-1, and a portion of the reinforcing sheet 12-1.

The underwater adhesive liner for partial repair and reinforcement of underground pipelines according to the present invention and the non-excavation partial repair and reinforcement method using the hybrid curing method are equipped with a partial repair device - Form an underwater adhesive layer on the liner - Insert and move an expandable photocuring packer - Liner expansion - It includes the process of light curing - cooling - recovery of the expandable photo-curing packer - adhesion by means of an underwater adhesive layer, and the specific process is as follows.

1. Mounting the partial repair device (see Fig. 7).

The partial repair device 200 is, for example, an electric cable reel that unwinds or winds the power cable connected to the expandable photocurable packer 100, an air compressor that produces compressed air and cooling air and supplies it to the expandable photocurable packer, an expanded sight A vacuum pump for shrinking and releasing the internal pressure of the chemical packer 100, a control panel for controlling the expansion-type photocuring packer 100, the electric cable reel, the air compressor and the vacuum pump, and a power supply supplying power to the control panel such as portable generators.

2. Formation of an underwater adhesive layer.

An underwater adhesive layer 13 is formed by applying an underwater curing mortar or an underwater adhesive to the circumferential surface of the reinforcing sheet of the liner 10 wound around the expandable photocurable packer 100 . At this time, in order to prevent the photocurable resin of the impregnated sheet 11-1 from being cured, a shade film may be installed or a protective sheet may be overlaid.

3. Insert and move the liner and the expandable photocurable packer (see Figure 8).

Insert the expandable photocuring packer 100 into the underground pipeline (1) and move it while loosening the power cable and air hose through the electric cable reel. The liner 10 moves along the underground conduit 1 without difficulty because it maintains a smaller diameter than the inner diameter of the underground conduit 1 .

At this time, the underground pipeline (1) can be checked through the CCTV, and the liner (10) is moved to the partial repair position (2).

4. Prepreg expansion (see Figure 9).

When the expandable photocurable packer 100 arrives at the partial maintenance position 2, it compresses air through an air compressor to supply compressed air to the air hose. Compressed air is supplied to the sealed space of the waterproof tube 60 through the air hose to inflate the waterproof tube 60 .

With the expansion of the waterproof tube 60 , the liner 10 is expanded and lined with the inner wall of the underground pipeline 1 .

5. Curing (see Figure 9).

After lining the liner 10 on the inner surface of the underground pipeline 1 , power is applied to the lamp 10 of the expandable photocuring packer 100 to light-curing impregnated in the impregnated sheet 11-1 of the liner 10 . harden the resin.

6. Cooling (see Figure 9).

After curing of the impregnated sheet 11-1 is completed, the lamp 10 is turned off and cooled (eg, cooled by injecting cooling air through an air compressor while maintaining the internal pressure of the waterproof tube).

7. Extended photocurable packer recovery (see Figure 10).

The waterproof tube 60 is contracted by quickly releasing the pressure inside the waterproof tube 60 using a vacuum pump. At this time, since the liner 10 has no choice but to maintain the same shape as the underground pipe 1 through hardening, it is not contracted even when the waterproof tube 60 is contracted.

The power cable and the like are wound through the electric cable reel to recover the expandable photocurable packer 100 to the ground.

8. Underwater adhesive layer adhesion.

For the above work, the upstream side of the underground pipe line (1) was flushed, and the water passing work was performed again to use the underground pipe line (1). In this case, the upstream water (sewage) passes through the underground pipeline 1, and at this time, the water induces the adhesion curing reaction of the underwater curing mortar or the underwater adhesive of the underwater adhesive layer 13, and the underwater adhesive layer 13 is cured. It is adhered to the inner surface of the underground pipeline (1).

10: Underwater adhesive liner for repair and reinforcement of underground pipelines,
11: repair reinforcement impregnated layer, 11-1: impregnated sheet
12: reinforcing layer, 12-1: reinforcing sheet
13: underwater adhesive layer;
20: cabinet, 21,22: cradle
30: storage,
100: expandable light-curing packer,

Claims (3)

At the periphery of the expandable photocurable packer, the impregnated sheet and the reinforcing sheet cut to a size for partial repair of the underground conduit are wrapped and combined, and an underwater adhesive means is applied to the outer surface of the reinforcing sheet to form an underwater adhesive layer. A first step of preparing an underwater adhesive liner for partial repair and reinforcement;
a second step of inserting the expandable photocurable packer and the underwater adhesive liner for partial repair and reinforcement of the underground pipeline into the underground pipeline and moving it to a partial repair position after watering the upstream side of the underground pipeline;
A third to expand the expandable photocurable packer to form the impregnated sheet and the reinforcing sheet of the underwater adhesive liner for repair and reinforcement of the underground pipe part in a tubular shape, and lining the underwater adhesive layer by the underwater adhesive means on the inner surface of the underground pipe step;
a fourth step of curing by irradiating UV to the underwater adhesive liner for repair and reinforcement of the underground pipeline part through the expandable photocuring packer;
a fifth step of cooling the underwater adhesive liner for repair and reinforcement of the underground pipeline;
a sixth step of shrinking the expandable photocurable packer and then recovering it to the ground;
A seventh step of adhering to the inner surface of the underground pipe while curing the underwater adhesive layer of the underwater adhesive liner for repairing and reinforcing the part of the underground pipe through the water flowing through the underground pipe by allowing water to pass through the upstream side of the underground pipe,
The underwater adhesive means is an underwater adhesive liner for partial repair and reinforcement of underground pipelines, characterized in that a UV blocker is mixed to prevent the photocurable resin impregnated in the impregnated sheet from curing due to the transmission of natural light and a hybrid curing method. Excavation part repair and reinforcement construction method. The method according to claim 1, wherein the underwater bonding means is an underwater adhesive in which water-curing cement, water and sunscreen are mixed as a material for underwater adhesion, or an underwater-curable adhesive in which water and a sunscreen are mixed, and the sunscreen is Non-excavation partial repair and reinforcement method using a hybrid curing method with an underwater adhesive liner for partial repair and reinforcement of an underground pipe, characterized in that 2 to 10% by weight is mixed with respect to 100% by weight of the underwater curing mortar or underwater adhesive. The method according to claim 1 or 2, wherein the reinforcing sheet comprises a polyester nonwoven fabric that is integrally synthesized with the impregnated sheet and the underwater adhesive layer by absorbing the inner photocurable resin and absorbing the outer underwater adhesive means. Underwater adhesive liner for partial repair and reinforcement of underground pipelines and a non-excavated partial repair and reinforcement method using hybrid curing method.

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