KR101970474B1 - Method for repairing crack of sleeve part in underground valve room - Google Patents

Abstract

The present invention relates to a method of repairing cracks in a sleeve portion in an underground valve chamber and a method of cutting a crack point 30a where leakage occurs between a tube body 20 in an underground valve chamber 10 and a wall body 30 surrounding the tube body, A step of filling the cutting groove with a filler material 32 containing a permeable adhesive reinforced waterproofing material and a cementing material and forming a repair part 33 by curing the filler material 32, Forming a resin injection path (34) that communicates with the outer circumferential surface of the tubular body from the wall of the tubular body, and injecting resin into the resin injection path at a high pressure to find another crack point (30b) between the wall and the tubular body; Forming a cutting groove by cutting other cracking points where cracks are generated, and filling the cutting groove with a filler containing the permeable adhesive-reinforced waterproofing material and quick-setting cement to form an additional repair part And the step of spraying the resin again with the resin injecting furnace to find out whether there is another leak or not is repeatedly performed to perform a crack repair operation between the wall and the pipe body so as to accurately locate only the crack point, It is possible to easily and quickly perform repairing of cracks in the wall which is not confirmed by the naked eye, as well as to minimize the repair work and work cost, and as a result, the workability can be improved And so on.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for repairing cracks in a sleeve portion in an underground valve chamber,

The present invention relates to a method for repairing cracks in a sleeve portion in an underground valve chamber, and more particularly, to a method for repairing cracks in a sleeve portion in an underground valve chamber by forming a cutting groove by cutting a crack point where leakage occurs in a tube- A step of filling a cutting groove with a filling material and curing the resin to form a repair part; forming a resin injection path on one side of the repair part; injecting resin into the resin injection path at a high pressure to check other cracks and forming an additional repair part And performing a crack repair operation between the wall and the tube body by repeatedly repeating the step of spraying the resin at high pressure again with the resin injection path to find another leak or not. ≪ / RTI >

Generally, in order to install various electric wiring in the apartments, large-scale buildings, etc., the through holes for the piping of the fire extinguishing facilities, and the ventilation holes for the fire extinguishing facilities, the penetrating sleeves must be installed before the concrete is laid .

In order to install a pipe penetrating the wall retaining wall of the building, a single pipe-type construction through sleeve having a certain diameter and length inside the formwork is used to wrap the pipe.

The general construction through sleeves described above are first installed in the formwork, then laid on concrete and laid in the wall.

However, the pipes and the through sleeves installed on the wall of the prior art are troublesome to be fireproofed because fire or heat is transferred to other places during the fire of the building. Therefore, Which is not only difficult but also complicated because of the complexity of the process.

The conventional through sleeves are provided with various kinds of pipes such as synthetic pipes, copper pipes, and steel pipes. However, when the through sleeves have different diameters and are eccentrically passed through the through sleeves, they can not be stably fixed. There is a problem that durability is lowered.

In order to solve such a problem, in a state in which concrete is directly placed on the outer circumferential surface of the general tubular body without using a through-type sleeve penetrating the wall, only the corner portion of the inside of the valve chamber, A method of solving the unstable support state of the flame and the pipe as well as a method of preventing leakage of water to the corner portions has been proposed.

However, since the wall and the tube are in close contact with each other, such a conventional technique is disadvantageous in that there is a large gap between the wall and the wall due to the difference in expansion and contraction coefficient between the wall and the wall due to external pressure, As a result, there has been a problem that leakage of water by only the ring-shaped sleeve is somewhat difficult.

If the wall is formed integrally with the outer periphery of the tube without the sleeve, it will be apparent that more leakage occurs through the so-called sleeve portion where the wall and the tube meet.

Further, in the case of performing the maintenance on the entirety of the sleeve portion, there is a problem that a large amount of the maintenance material and the work flow are required.

Korean Utility Model Publication No. 20-2009-0005051

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a cutting apparatus, comprising: forming a cutting groove by cutting a crack point where leakage occurs in a sleeve portion between a tube body in an underground valve chamber and a wall surrounding the tube body; Forming a repair part by filling and curing a filler including a penetration-resistant adhesive water-proofing material and a cement-based material, forming a resin injection path communicating from one side of the repair part to an outer circumferential surface of the tube, A step of spraying the resin at a high pressure to find another crack point between the wall and the tube body; cutting the other crack point where the new leak is generated to form a cutting groove; Filling and filling the filler material with the resin filler to form an additional repair part, And repeating the step of repeating the step of spraying the resin again with high pressure to find out whether there is any leakage, thereby performing a crack repair operation between the wall and the pipe body to find out only the crack point accurately and perform leak and crack repair work And a method of repairing cracks in a sleeve portion in an underground valve chamber.

In addition, between the tubular body and the repair part, a waterproof rubber is applied as an elastic waterproof material capable of smoothly responding to the expansion and contraction between the tubular body and the wall, thereby minimizing re-cracking between the tubular body and the wall The present invention provides a method for repairing cracks in a sleeve portion in an underground valve chamber.

According to another aspect of the present invention, there is provided a method of repairing cracks in a sleeve portion in an underground valve chamber, the method comprising: disposing a crack in a sleeve portion between a tube in an underground valve chamber and a wall surrounding the tube, Forming a cutting groove by cutting; Filling the cutting groove with a filling material including a permeable adhesive-reinforced waterproofing material and a cement-based hardening cement to form a repair part; Forming a resin injection path communicating from one side of the maintenance part to an outer circumferential surface of the tubular body; Injecting resin into the resin injection furnace at a high pressure to find another crack point between the wall and the tube; Cutting another crack point at which the new water leakage occurs to form a cutting groove; Filling the cutting groove with a filling material including a permeable adhesive-reinforced waterproofing material and a quick cement to form an additional repair part; And repeating the step of spraying the resin again with the resin injection furnace to find out whether there is another leak, thereby performing a crack repair operation between the wall and the pipe body.

Further, in the sleeve portion crack repairing method in the underground valve chamber according to an embodiment of the present invention, the step of applying the elastic waterproof finishing material to the surfaces of the wall portion and the tube portion of the plurality of repair portions, have.

Further, in the sleeve portion crack repairing method in the underground valve chamber according to an embodiment of the present invention, an injection tube is installed in the resin injection path so that high-pressure resin can be smoothly guided to the outer circumferential surface of the tubular body through the resin injection path There may be more steps to do.

Further, in the sleeve portion crack repairing method in the underground valve chamber according to an embodiment of the present invention, the resin injection path may be provided corresponding to each of the repair portions, and may be provided in a crack path connected to the existing resin injection path and the crack point So that the resin is cured in a filled state.

Further, in the sleeve portion crack repairing method in the underground valve chamber according to an embodiment of the present invention, an elastic waterproofing material may be further provided between the tubular body and the repairing portion so as to smoothly respond to the elongation and leakage between the tubular body and the wall. have.

Further, in the sleeve portion crack repairing method in the underground valve chamber according to an embodiment of the present invention, the elastic waterproofing material may be made of a water expansion rubber.

As described above, in the method of repairing cracks in the sleeve portion in the underground valve chamber of the present invention, the cutting groove is formed by cutting a crack point where leakage occurs in the sleeve portion between the tube body in the underground valve chamber and the wall surrounding the tube body Forming a repairing part by filling and curing the filler material including the permeable adhesive reinforced waterproofing material and the quick cement in the cutting groove and forming a resin injection path communicating from one side of the repair part to the outer circumferential surface of the tube, A step of injecting a resin at a high pressure into the resin injection path to find another cracking point between the wall and the tube body; cutting the other cracking point where the new leakage occurs to form a cutting groove; Filling and curing the filler material containing the reinforced waterproofing material and the cemented cement to form an additional repair part, A step of repetitively repeating the step of spraying the resin again by injecting the resin with the injection line to find out whether there is another leak or not, and performing a crack repair operation between the wall and the pipe body to find out only the crack point accurately, It is possible to perform the repair of the cracks in the wall which is not visually confirmed easily and quickly, as well as to reduce the maintenance work and the work cost as much as possible, and as a result, the workability can be improved .

In addition, between the tubular body and the repair part, a waterproof rubber is applied as an elastic waterproof material capable of smoothly responding to the expansion and contraction between the tubular body and the wall, thereby minimizing re-cracking between the tubular body and the wall Thus, it is possible to improve the reliability of the operation by reducing the cost of deleting the additional maintenance work, and so on.

FIG. 1 is a schematic cross-sectional view showing a completed state according to a method of repairing cracks in a sleeve portion in an underground valve chamber according to an embodiment of the present invention.
FIG. 2 is a schematic view sequentially illustrating a core construction process according to a sleeve portion crack repairing method in an underground valve chamber according to an embodiment of the present invention.
3 is a table showing the testability of the elastic waterproofing material applied to the sleeve portion crack repairing method in the underground valve chamber according to an embodiment of the present invention.
4A and 4B are quality test reports of an elastic waterproofing material applied to a sleeve portion crack repairing method in an underground valve chamber according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 and 2, a method of repairing cracks in a sleeve portion in an underground valve chamber according to an embodiment of the present invention is a method of repairing cracks in a sleeve portion in an underground valve chamber 10, a wall body 30 surrounding the tube body 20 Cutting a crack point 30a where leakage occurs at the sleeve portion between the cutting groove 31 and the cutting groove 31 to form a cutting groove 31 having a triangular cross section; A step of forming a repair part 33 by filling and curing the filler 32 which is located at a predetermined distance from the repair part 33 and a resin injection path 34 which is slantingly connected to the outer circumferential surface of the tube 20 (30b) between the wall (30) and the tubular body (20) by spraying the resin with the resin injection path (34) at a high pressure; The cutting point 30b is cut to form the cutting groove 31 Filling the filling groove 32 with the penetration-resistant adhesive waterproofing material and quick-setting cement into the cutting groove 31 and curing the additional filler 33 to form an additional repair part 33; And performing a crack repair operation between the wall 30 and the tubular body 20 by continuously repeating the step of spraying the wall 30 and detecting the presence of another leak.

Here, the fact that cracks have occurred in the wall body 30 can be grasped sufficiently that a gap is already generated between the wall body 30 and the tube body 20 due to the difference in expansion coefficient between them, Cracks in the wall 30 can be immediately repaired, but cracks in the wall 30 that are not visible to the naked eye can be prevented by the natural water of the surrounding land 30 outside the wall 30, It will be apparent that the water leaks into the underground valve chamber 10 through the gap.

The filling material 32 including the cemented cement includes a resin stream, specifically, a permeable adhesion enhancer. The filler material 32 includes not only the resistance against the axial compressive force, which is an inherent function of the wall 30, (That is, another wall facing each other), so as to prevent the stress from concentrating on the outer peripheral portion of the tube 20, and further, the permeable adhesion enhancer component is capable of absorbing the external force If necessary, it penetrates into the porous concrete or the concrete with deteriorated surface and plays a role of strongly fixing the surface.

The reason why the synthetic resin flow is injected at a high pressure through the resin injection path 34 is to allow the injected resin to smoothly reach the cracking point of the sleeve part on the cracked part, So that the resin can be injected into the crack part by interrupting the crack which can be connected to the lower repair part 33 and / or the bottom concrete.

Here, the resin is a curable resin, and generally includes a resin used as a filler such as an epoxy resin, a polyester resin, and a polyurethane resin, and preferably has a spring molecular structure, Excellent polyurethane resin can be applied.

The method may further include the step of applying an elastic waterproof finishing material 35 to the surface of the tubular body 20 and the plurality of repair parts 33 and the peripheral wall 30 thereof.

Herein, the elastic waterproof finishing material 35 serves as a further waterproofing function, and what is used here is a resin commonly used for coating for waterproofing, such as epoxy resin, polyester resin, polyurethane resin, etc. Specifically, for example, 20 parts by weight of isocyanate-blocked polyurethane, 30 parts by weight of amorphous silicon dioxide, 20 parts by weight of calcium carbonate, 10 parts by weight of trimethylenehexamethylene diamine, and an alkylsulfonic acid ester of phenol 20 parts by weight of a mixture (A) or 37 parts by weight of a pozzolanic acid, 47 parts by weight of an acrylic emulsion, and the balance of water (B).

The injection pipe 36 may be installed in the resin injection path 34 so that the high pressure resin can be smoothly guided to the outer circumferential surface of the tube 20 through the resin injection path 34.

The resin injection path 34 is provided corresponding to each of the repair parts 33 so that the preceding resin injection path 34 is cured in a state where the resin is filled in the crack path connected to the crack points 30a and 30b And the resin injection operation is performed by the following resin injection path 34. [

By doing so, it is possible to naturally perform the maintenance of the cracks in the process of each resin charging operation.

An elastic waterproof material 37 may be further provided between the tubular body 20 and the repair part 33 so as to smoothly cope with elongation and leakage between the tubular body 20 and the wall 30.

The elastic water-repellent material 37 may be a so-called water-swellable rubber which is expanded in volume when water is absorbed.

Figs. 3 to 4B show test results of the elastic waterproofing material of the present invention and a quality test report. Fig.

In this case, various test items are applied, and the reference value and the result are compared with each other in terms of performance, and it is found that the applicable items are all appropriate in the suitability of the test.

Meanwhile, prior to the maintenance work, the water immersed in the underground valve chamber 10 is removed by using an underwater pump, the soil and impurities deposited on the bottom layer are treated, and then the foreign substances are removed by a high pressure washer or a grinder And the inside of the underground valve chamber 10 is sufficiently dried through a blower or the like when the index is completed and no water leakage occurs after the maintenance work so as to optimize the application of the elastic waterproof finishing material 35 So that the curing can be smoothly performed through sufficient blowing after the application.

As described above, in the sleeve portion crack repairing method in the underground valve chamber of the present invention, a cutting groove is formed by cutting a crack point where leakage occurs at the sleeve portion between the tube body in the underground valve chamber and the wall surrounding the tube body, Forming a repairing part by filling and curing the filler material including the permeable adhesive reinforced waterproofing material and the quick cement in the cutting groove and forming a resin injection path communicating from one side of the repair part to the outer circumferential surface of the tube body; The method comprising the steps of: injecting a high-pressure resin into an injection furnace to find another cracking point between the wall and the tube body; cutting the other cracking point where the new leakage occurs to form a cutting groove; And filling and curing the filler containing the cement to form additional repair parts, A step of repeating the step of spraying the resin at high pressure again to find another leak or not by repeating the step of performing the crack repairing operation between the wall and the pipe body to find out only the crack point accurately and perform the leakage and crack repair work It is possible to easily and quickly carry out repairing of cracks in the inside of the wall which is not visible to the naked eye, as well as to minimize the amount of repair work and work water, thereby improving the workability as a result.

In addition, between the tubular body and the repair part, a waterproof rubber is applied as an elastic waterproof material capable of smoothly responding to the expansion and contraction between the tubular body and the wall, thereby minimizing re-cracking between the tubular body and the wall So that the reliability of the operation can be improved by reducing the cost of deleting additional maintenance work.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It should be understood that all of the techniques that can be easily changed and used by those skilled in the art are included in the technical scope of the present invention.

DESCRIPTION OF REFERENCE NUMERALS
10: underground valve room 20: pipe body
30: wall 30a, 30b: crack point
31: cutting groove 32: filler
33: repair part 34: resin injection path
35: elastic waterproof finishing material 36: injection tube
37: Elastic waterproofing material

Claims (5)

Forming a cutting groove by cutting a crack point where leakage occurs in a sleeve portion between a tube in an underground valve chamber and a wall surrounding the tube;
Filling the cutting groove with a filling material including a permeable adhesive-reinforced waterproofing material and a cement-based hardening cement to form a repair part;
Forming a resin injection path communicating from one side of the maintenance part to an outer circumferential surface of the tubular body;
Injecting resin into the resin injection furnace at a high pressure to find another crack point between the wall and the tube;
Cutting another crack point at which the new water leakage occurs to form a cutting groove;
Filling the cutting groove with a filling material including a permeable adhesive-reinforced waterproofing material and a quick cement to form an additional repair part; And
And repeating the step of spraying the resin again with the resin injection path to find whether there is any leakage, thereby performing a crack repair operation between the wall and the pipe body,
Further comprising an elastic waterproofing material between the tubular body and the repairing part so as to smoothly accommodate the elongation and leakage between the tubular body and the wall. The method according to claim 1,
Further comprising the step of applying an elastic waterproof finishing material to the surface of the tubular body and the walls of the plurality of repair parts and the peripheral parts thereof. 3. The method of claim 2,
Further comprising the step of installing an injection tube in the resin injection path so that the high-pressure resin is smoothly guided to the outer circumferential surface of the tube through the resin injection path. The method according to claim 1,
Wherein the resin injection path is provided in correspondence with each maintenance part so as to be cured in a state in which the resin is filled in the existing resin injection path and the crack path connected to the crack point. delete

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