KR20030042159A - A Method of Construction for Sewer Repair - Google Patents

Abstract

PURPOSE: A repair method for a buried pipe is provided to cut off and to reinforce the crack and damaged part of a pipe at once. CONSTITUTION: The repair method for a buried pipe comprises the steps of: checking the crack and damaged part of a drainpipe and pre-treating the drainpipe to remove impurities and obstacles; preparing sheets formed by placing adhesive resinous materials to reinforce the damaged part of a pipe(10); attaching the sheets around an unmanned packer in order; locating an unmanned packer in the crack and damaged part of the pipe(10), and expanding the body of the unmanned packer to be pressed to the inside of a pipe(10) for appointed hours by injecting compressed air to shift and adhere the sheets attached to the unmanned packer to the crack and damaged part; and releasing compressed air in the unmanned packer, then removing from the pipe(10).

Description

A Method of Construction for Sewer Repair}

The present invention relates to a method for repairing buried pipes used to repair cracks and broken portions of all underground pipes, and in particular, it is possible to simultaneously achieve the index of cracks and reinforcement of cracks of buried pipes by one construction. It is about buried pipe repair method that we made possible.

In general, it is well known that when underground pipes (eg, waste water pipes, water and sewage pipes, etc.) are cracked or damaged, they are repaired using a non-excavated unmanned repair machine. The construction method and the reinforcement method are mainly used.

First, the former exponential method is mainly used for repairing to prevent leakage and intrusion water generated through gaps caused by cracking of pipes or corrosion of joints of pipes. As you can see, the pre-prepared index material (made by mixing chemical grout and hardener in a ratio of 1: 1 ~ 1: 4) is injected into the cracks of the pipe or the cracks of the joints so that they penetrate into the cracks or cracks. Then, when it is left to harden for a predetermined time, it finishes through the washing | cleaning operation, such as grinding.

However, while the above exponential method seals against leaks or intrusions into the cracks or crevices of the pipe, it is sufficiently sealed as the expansive material, but weakening of the strength of the pipe itself due to cracks or crevices cannot be reinforced. There is a problem that can not prevent the risk of damage to the pipe itself due to the cracked portion. For this reason, there is a problem in that the construction has to be done in a separate reinforcement work to be described later, and the expenses are increased as much. In addition, the index material that is hardened by entering the crack or crevice is also contaminated with the environment because the crack may be penetrated into the ground through the crack or crevice while the index material is cured. In addition, the "method of constructing a non-vulcanized adhesive waterproof sheet" disclosed in Korean Patent Publication No. 147536, which was developed by using the method for exponential use in the near field, and also disclosed in Patent Publication No. 2001-46737 Manufacturing method and a method using the same in the non-vulcanized adhesive waterproof sheet, but there is a weak point in the reinforcement of the pipe itself.

The latter reinforcing method is mainly used for reinforcing pipe breakage, joint breakage and joint step difference. In the repair work, the reinforcing material made by impregnating the glass fiber sheet with resin is an unmanned repairing machine. Using a packer), the damaged part is reinforced by applying pressure to the damaged part inside the pipe.

However, the existing reinforcement method relies on the glass fiber sheet impregnated with resin to reinforce the damaged part of the pipe itself, but the complete index of leakage or intrusion water generated through the cracks or cracks caused by the broken part is reinforced. (Sealing, 止水) has a problem that is not achieved. Because of this, there is a problem that the construction has to be separately indexed in the future and the expense is much higher.

Accordingly, an object of the present invention is to solve the above-mentioned shortcomings, and to simultaneously achieve the index of cracks and reinforcement of cracks of buried pipes through a single construction, thereby reducing the number of work processes and cost as much as the reduction. To provide a buried conservative repair method that can achieve an economic effect.

In order to achieve the above object, the buried pipe repair method of the present invention is a method for repairing cracks and broken portions of a pipe buried in the ground associated with the invention of claim 1,

A pretreatment process to check for cracks and damages in the sewer pipe and to remove foreign substances and obstacles adhered to the surroundings; A step of preparing sheets formed by applying adhesive resin raw materials which are installed at cracks and breakage portions inside the tube where the pretreatment process is completed to reinforce and index the breakage portions; A step of sequentially mounting the sheets manufactured above in the vicinity of an unmanned repairer prepared in advance; After placing the unmanned repair machine at the crack and damage part inside the pipe, the body of the unmanned repair machine by compressed air is expanded for a certain time to be compressed to the inner circumferential surface of the pipe and the sheets mounted on the unmanned repair machine are moved to the cracked and damaged part side. To attach while being made; And a process for withdrawing from the inside of the tube while releasing compressed air.

The pre-treatment process is a step of checking the presence of obstacles, such as cracks and breaks, foreign matter and sludge in the tube using a closed circuit (CCTV) camera; And cleaning the obstacles such as foreign matter and sludge remaining inside the pipe by jet cleaning.

In addition, the sheets may include a first sheet coated with an adhesive material on an unvulcanized rubber sheet; It is preferable to use a second sheet obtained by impregnating a resin into a polyester felt paper.

In addition, the mounting process of the sheets in the unmanned repair machine comprises the steps of mounting a second sheet formed by impregnating a resin in a polyester felt paper wrapped around the unmanned repair machine; The second sheet is preferably mounted in a form of surrounding the first sheet coated with an adhesive material on the unvulcanized rubber sheet, wherein the first and second sheets are stacked and integrated into the tube. It is attached to cracks and breaks in the structure so that both index and reinforcement are achieved simultaneously.

In addition, the air pressure for the expansion of the unmanned maintenance machine is 2kg / ㎠, the pressurization time is preferably carried out for at least 2 hours.

The present invention having the above configuration has the effect of simultaneously achieving the index of the cracked portion of the buried pipes and the reinforcement of the broken portion by one construction.

1a to 1h are views showing the processes of the buried pipe repair method according to the present invention, respectively,

2 is a cross-sectional view showing the repair structure of cracks and damage sites of the buried pipe constructed by the method of the present invention.

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

10: underground buried pipe 100: pretreatment process

200: sheet preparation process 400: sheet mounting process in unmanned packer

600: Sheet pressing process on pipe cracks and damage

800: unmanned repair machine withdrawal process

Hereinafter, with reference to the accompanying drawings will be described in detail a more preferred embodiment of the buried pipe repair method of the present invention.

1a to 1h are views showing the processes of the buried pipe repair method according to the present invention, respectively.

<Pretreatment Step 100: Figs. 1A to 1C>

In order to repair cracks and damages of the pipe 10 embedded in the ground (1), the pre-treatment process for checking the cracks and damages in the pipe (10) and removing the foreign matters and obstacles attached to the surroundings (100) ). The pretreatment process 100 is a step of checking the presence or absence of obstacles such as cracks and damage sites, foreign matter and sludge in the tube 10 using the closed circuit (CCTV) camera (2) and the inside of the tube 10 Removing obstacles 3a and 3b such as foreign matter and sludge remaining in the jet cleaning 4a or cutting robot 4b (Fig. 1B and Fig. 1C). Since the camera 2, the jet cleaning 4a, and the cutting robot 4b, which are used for checking and cleaning the inside of the pipe 10, are general items, a separate description of the specific structure or operation of each of them is omitted. .

<Sheet Preparation Process 200: Figs. 1D-1E>

This process 200 applies sheets 210a and 210b which are coated or impregnated with adhesive resin raw materials for use in reinforcing and quenching cracks and breaks in the tube 10 where the pretreatment process 100 is completed. It is a step to prepare. The sheets 210a and 210b may be uniformly coated with the roller 216 on the unvulcanized rubber sheet 212a by using an adhesive material 214a (also called a primer) to apply the first sheet 210a. 1D and a step of uniformly impregnating the polyester felt paper 212b with the adhesive resin 214b using the brush 218 to form the second sheet 210b (FIG. 1E). When the sheets 210a and 210b are installed in the pipe 10, the first sheet 210a mainly formed by applying an adhesive material 214a to the unvulcanized rubber sheet 212a mainly serves an exponential function. The second sheet 210b formed by evenly impregnating the adhesive resin 214b on the polyester felt paper 212b has a reinforcing effect. The type of resin impregnated into the polyester felt paper 212b is polyurethane or epoxy.

<Sheet mounting process 400: Fig. 1f>

This process is a step of sequentially mounting the sheets 210a, 210b prepared in the above process around the unmanned packer (5) prepared in advance, the mounting order is the body of the unmanned service (5) The second sheet 210b formed by impregnating a resin in a polyester felt paper is wrapped around the body of the unmanned water retainer 5, and then adhered to the unvulcanized rubber sheet on the second sheet 210b. ) Is mounted in the form of wrapping the first sheet 210a coated with the? Only in this order is the first sheet 210a coated with a tacky material on the unvulcanized rubber sheet directly sealing the cracks or breaks in the pipe 10 to fundamentally prevent leakage or infiltration. Exponential function. In addition, the second sheet 210b integrated with the first sheet 210a reinforces the fragility of the strength of the pipe 10 itself due to cracks and breakage portions inside the pipe.

<Sheet crimping process 600: Fig. 1H>

The process 600 is a process of compressing and attaching the sheets 210a and 210b, which have been mounted on the unmanned maintenance machine 5, through the process 400 to the cracks and breaks in the tube 10.

That is, the unmanned repair machine 5 equipped with the sheets 210a and 210b is moved to the inside of the pipe 10 so as to be accurately positioned at the crack and the damaged part of the pipe 10, and then the unmanned repair machine 5 Compressed air having a pressure of approximately 2 kg / cm 2 is supplied through the hose 7. When the injection of compressed air is started, the body of the unmanned water dispenser 5 expands to the inner circumferential surface of the tube 10, and the sheets 210a and 210b mounted on the unmanned water dispenser 5 are separated from each other. The expansion pressure is strongly compressed (pressure of 2 kg / cm 2) to the cracks and breaks of the pipe 10. The compression time is approximately 2 hours. Due to this compression, the sheets 210a and 210b mounted on the unmanned maintenance machine 5 penetrate into the cracks and breaks of the tube 10 as the adhesive materials impregnated in the sheets 210a and 210b are pressed. Like the sheets 210a and 210b, they are integrally attached to the inner circumferential wall of the tube 10.

Therefore, the cracks and the damaged part of the tube 10 are formed by the first sheet 210a on which the adhesive material is coated on the unvulcanized rubber sheet and the second sheet 210b by impregnating the resin in the polyester felt paper. Exponential and reinforcement are run simultaneously.

<Unmanned maintenance machine withdrawal process (800): Fig. 1h>

This process 800 is a process of withdrawing the unmanned repair machine 5 from the inside of the tube 10 after completing the exponent and reinforcement work of the pipe 10, pre-injected during the withdrawal of the unmanned repair machine 5 After the compressed air is released, the air may be withdrawn.

Since the structure and operation of the unmanned repair device 5 used for the repair of the pipe 10 in the above is a general technology, a detailed description thereof will be omitted.

2 is a cross-sectional view showing the repair structure of cracks and damage sites of the buried pipe constructed by the method of the present invention.

This figure shows the attachment structure of the sheets 210a, 210b attached to the cracks and breaks of the pipe 10 through the processes (100, 200, 400, 600, 800) as described above, applying an adhesive material to the unvulcanized rubber sheet The first sheet 210a directly seals the cracks or breakage portions of the tube 10, and the second sheet 210b formed by impregnating a resin in a polyester felt paper is formed on the first sheet 210a. Since it is integrated, the fragility of the pipe 10 itself due to cracks and breaks is also reinforced.

The test results of applying the method and the existing methods of the present invention exhibiting the above characteristics to the cracks and breaks of the tube were shown in Table 1 below.

division Index injection method Index ring insertion method Reinforcing material filling method Reinforcement sheet attachment method The present invention Applicable diameter (mm) 100-1200 250-1200 300-600 250-1200 250-1200 Applicable species All round pipe except corrugated steel pipe All round pipe except corrugated steel pipe Concrete pipe All tubes of circular section All kinds of tubes Tube breakage Less than 40cm X △ 0 ◎ ◎ More than 40cm X X △ ◎ ◎ Seam relaxation X O ◎ ◎ ◎ Step X X 0 ◎ ◎ damage X △ 0 ◎ ◎ crack Crossing crack X △ ◎ ◎ ◎ Termination Crack Less than 30cm X 0 ◎ ◎ ◎ More than 30cm X X ◎ ◎ ◎ Intruder Tube break Less than 30cm X 0 0 X ◎ More than 30cm X X △ X ◎ Corrugated steel pipe X X X X 0 Seam No step ◎ ◎ △ X ◎ There is a step ◎ X △ X ◎ Termination Crack Less than 30cm ◎ ◎ △ X ◎ More than 30cm X X △ X ◎ Leak ◎ ◎ ◎ 0 ◎ depression Unrepairable by non-excavation repair method Gradient Unrepairable by non-excavation repair method

◎: Repair effect is very good, 0: Repair is possible, △: Repair is possible, but there is a risk of rehabilitation, X: Not applicable.

As can be seen from the above table, it can be seen that the method of the present invention is applied to all kinds of pipes, unlike the existing method, and also to prevent damages, joints, cracks and intrusions of the pipes. When the method is applied, it is superior in terms of repairs such as index and reinforcement.

As described above, according to the present invention, it is possible to prepare for the defects (pipe breakage, intrusion water, etc.) that can be generated later by the exponent and reinforcement that have been achieved by separate construction in a single construction. A perfect index can be achieved by adhesion rather than adhesion. Work time is shortened by index and reinforcement by one time construction. The use of an unvulcanized rubber sheet and a polyester felt has no joints, and there is no fear of environmental pollution, and the working environment is clean.

Claims (5)

In the method for repairing cracks and breaks in the underground pipes, A pretreatment process to check for cracks and damages in the sewer pipe and to remove foreign substances and obstacles adhered to the surroundings; A step of preparing sheets formed by applying adhesive resin raw materials which are installed at cracks and breakage portions inside the tube where the pretreatment process is completed to reinforce and index the breakage portions; A step of sequentially mounting the sheets manufactured above in the vicinity of an unmanned repairer prepared in advance; After placing the unmanned repair machine at the crack and damage part inside the pipe, the body of the unmanned repair machine by compressed air is expanded for a certain time to be compressed to the inner circumferential surface of the pipe and the sheets mounted on the unmanned repair machine are moved to the cracked and damaged part side. To attach while being made; And A method for repairing buried pipe, which includes a step of evacuating an unmanned water dispenser from inside a pipe while releasing compressed air. The method of claim 1, wherein the pretreatment process comprises: checking whether there are obstacles such as cracks and damages in the tube, foreign matter and sludge using a closed circuit (CCTV) camera; and The cleaning method of the buried pipe, comprising the step of cleaning the obstacles such as foreign matter and sludge remaining inside the pipe by jet cleaning. The sheet of claim 1, wherein the sheets comprise: a first sheet coated with an adhesive material on an unvulcanized rubber sheet; And A repair method for a buried pipe, comprising a second sheet obtained by impregnating a resin into a polyester felt paper. According to claim 1 or claim 3, wherein the mounting process of the sheet in the unmanned repair machine comprising the steps of mounting a second sheet formed by impregnating a resin in a polyester felt paper wrapped around the unmanned repair machine; And And mounting the first sheet coated with the adhesive material on the unvulcanized rubber sheet over the second sheet in a form of wrapping, wherein the first and second sheets stacked and integrated are cracked inside the tube. And repairing the buried pipe, wherein the buried pipe is attached to the damaged part to simultaneously achieve index and reinforcement. The method of claim 1, wherein the air pressure for expansion of the unmanned repair device is 2kg / ㎠, the pressurization time is carried out for at least 2 hours.