KR101060510B1 - How to repair pipeline - Google Patents

Abstract

The present invention relates to a repair method of a pipeline so that it can be easily and quickly repaired in the event of breakage of old water, sewage pipes or other underground pipes buried without excavating the road.

The present invention, the first step of inserting the liner in the interior of the pipeline to be in close contact with the inner wall, the second step of inserting the inliner in the interior of the liner, and injecting the injector into the space between the liner and the inliner in three steps It is composed.

Pipeline, aging, breakage, repair, liner, insertion

Description

Pipeline Repairing Method

The present invention relates to a method for repairing a pipeline, and more particularly, to a method for repairing a pipeline to easily and promptly repair a broken water, sewage pipe, or other pipeline buried in an underground site without digging a road. It is about.

Sewerage, defined as conduits or structures that are equipped to sanitize sewage and rainwater generated from human life, collects waste resources (sewage), including organic matter, nutrients, and thermal energy, for 24 hours in a row. As the only collection passage, there are many poor sewage pipes in Korea, which are failing to function as facilities for preventing pollution as well as for disaster prevention due to leakage, lack of water supply, and damage due to negligence in post management and maintenance. As a result, it is urgent and urgent to maintain the faulty conduit and make the sewer pipe function smoothly.

In other words, as a hollow pipe-type pipe, sewage pipes which are usually buried underground are used in various ways such as conduit pipes, fume pipes of reinforced concrete pipes, and vinyl chloride pipes made of synthetic resin. These sewer pipes are used for aging, subsidence of underground soil, and earth pressure from the ground. As cracks, breaks, or joints are relaxed due to various reasons such as fluctuations, rainwater, etc., flows into sewage pipes, reducing the efficiency of sewage treatment (infiltration water), or water and soil contamination (effluent water) due to the discharge of wastewater inside the pipes. In addition, there is a problem of replacing or repairing a broken or cracked sewage pipe with a new one, which causes environmental destruction such as ground erosion.

However, the excavation method, which partially replaces or repairs a new fuse after excavating a conventional road, is required due to dust, noise, industrial waste increase, risk of destruction of underground buried material, traffic obstacles and long-term air. While it was inconvenient, time-consuming, and economical, it caused a lot of social costs. However, the replacement of the replacement section was partially solved by partial replacement of the old building.

Therefore, the entire sewage network function to be connected with the connecting pipe can not be performed smoothly, and the backfilling soil is not properly made during most excavation construction, causing problems such as providing cracks, breakage and steps.

The new sewage pipe repair and reinforcement method was required, and as an improved sewage pipe repair method, a non-excavation method was proposed, which is a method to repair the sewer pipe without digging a road.

This method can be used to repair sewage pipes partially or entirely without road excavation, thus improving productivity due to air shortening, reducing costs, minimizing traffic jams, preventing surrounding settlements, and preventing noise or construction waste from road excavation. It is a city transportation and residential friendly method.

In other words, non-excavation method among sewage pipe repair / reinforcement methods means that sewage pipes underground are cracked, shorted, stepped, leaked, wall lost, dents, loosened joints, broken joints, etc. In case of failure to maintain structural strength due to defects such as projecting / relaxation of connectors and breakage of manholes, and inability to perform sewage transport due to increased penetration / inflow through the damaged parts, Rehabilitation of the sewer pipes, which were relied on, was repaired by cutting-edge equipment and special lining materials (tubes) to repair various defects in a short time without excavation of the road, and to reinvent them as sewer pipes that maintain the strength and roughness coefficient of fuses and durability for more than 50 years. The advanced concept that supplements the problems of conventional construction methods by referring to the new concept of sewage pipe maintenance technology. Trenchless Method expressions are being continuously developed.

Therefore, the non-excavation repair method is a method that repairs problems inside the sewer pipe in a short period of time without the excavation work by using the repair materials and equipment according to CCTV and non-excavation repair method. Minimize commercial damages, traffic obstacles, noise, etc., and prevent various safety accidents (gas pipe explosion, communication tube cutting) that can occur during excavation construction, and promote advanced repairs in a short time. There is an advantage to this.

Korean Patent Laid-Open Publication No. 10-2004-0088115 is published as a prior art related to the non-excavation repair method.

Looking at the above prior art,

(a) cleaning and ordering the sewer pipe; (b) inserting a base liner and an endothelial liner into the sewer pipe; (c) sealing both cut surfaces of the foundation liner and the endothelial liner; (d) ordering both ends of the endothelial liner with an order packing and injecting water into the endothelial liner to achieve watertightness; And (e) filling grout in the space between the foundation liner and the endothelial liner.

In particular, during the process, the base liner is inserted into the sewer pipe, the endothelial liner is inserted into the inside of the base liner, and the mortar is filled in the space between the base liner and the endothelial liner to cure.

Before this operation, the inside of the sewer pipe is washed, and a process packer is installed at both ends to insert the foundation liner and the endothelial liner in a closed state.

In addition, the process of filling the high pressure air or water in order to be in close contact with the inner wall of the sewer pipe after inserting the base liner.

However, there was a problem of an accident that the sewage pipe bounced out in the process of filling the high pressure air.

In addition, even if the foundation liner is in close contact with the inner wall of the sewer pipe, because the inner wall surface of the sewer pipe is uneven and uneven, there is a problem that a gap occurs between the foundation liner and the inner wall of the sewer pipe.

In addition, to prevent the packer from being detached, but the support bar is installed on the rear, this also causes the problem that the packer is separated because the support bar does not withstand the pressure and break or bounce during high pressure expansion.

The present invention has been made to solve the above problems of the prior art, substantially repairing the damaged parts of the old water and sewage pipes without excavating the road and at the same time forming a new pipe wall inside the pipeline to substantially replace the pipeline with a new one The purpose is to provide a repair method for the non-excavated pipeline, which ensures safety and makes the construction simple.

The object of the present invention described above,

In the method for repairing the upper, sewer pipe line, Step 1 to surround the inner wall of the pipeline by inserting a liner in the interior of the pipeline; Inserting an expansion means into the inserted liner; Installing a packer at both ends of the conduit to seal the pipe; Injecting and expanding the fluid into the expansion means to bring the liner into close contact with the inner wall of the conduit; It can be achieved by a conduit repair method comprising a five step of filling the mortar between the liner and the inner wall of the conduit.

The first step is characterized in that it further comprises a step 1-1 for bonding both ends after the cylindrical liner to be inserted into the pipe while bending in a cylindrical shape.

The liner is characterized in that a plurality of protrusions having a predetermined length on the outer surface to form a spaced space with the inner wall of the sewage pipe.

The third step is characterized in that it further comprises the step of fixing by installing a fixing device on the outside of the packer.

The fixing device is a crutch having a predetermined length, characterized in that one end of the crutch is fixed to the support and the other end is installed to be fixed to the back of the packer.

The expansion means of the third step is characterized in that the tube is made of rubber material in which the volume is expanded when the air or water filled with fluid.

The tube is characterized in that the rod is formed at both ends, the rod shape having a predetermined length formed with an injection hole on one side.

The tube is characterized in that a plurality of convex portions and concave portions are continuously formed so as to be uniformly inflated.

The tube is characterized in that the pressure measuring means for measuring the appropriate pressure is further installed.

The pressure measuring means is characterized in that the sensor is inserted into the tube, and a pressure gauge for expressing the value detected by the sensor in a digital or analog manner.

According to the present invention, by effectively repairing the damaged parts of the old water and sewage pipes without excavating the road and forming a new pipe wall inside the pipeline, the effect of substantially replacing the pipeline is obtained.

In addition, according to the present invention, the watertightness and durability of the damaged existing pipe can be increased, and long sections can be easily constructed.

Moreover, according to this invention, it is excellent in durability. That is, filling the mortar in the space between the liner and the projection of the HDPE series has a high strength and high elasticity, and excellent corrosion resistance is semi-permanent life.

Moreover, according to this invention, it can be installed in the tube of all shapes. In other words, the HDPE liner is soft and flexible, so that it can be inserted into a natural shape by gently adhering to all shapes of tubes (round, oval, and box).

In addition, according to the present invention, the inner surface of the HDPE liner is smooth so that the roughness coefficient is lowered, the flow rate and flow rate can be increased after construction.

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

1 is a flow chart showing a repair method of a pipeline according to the present invention, Figure 2 is an exemplary view showing step by step of the repair process of the pipeline according to the present invention, Figure 3 shows a repair method of the pipeline according to the present invention as a whole Drawing.

Referring to Figures 1 to 3, the pipeline repair method according to the present invention,

The first step (S1) to surround the inner wall of the pipe line (P) by inserting a liner (R) in the upper, sewage pipe line (P);

Inserting an expansion means (T) into the inserted liner (R) (S2);

Three steps (S3) of installing and packing packers (F-1, F-2) at openings at both ends of the conduit (P);

Injecting fluid into the expansion means (T) to expand and expand the liner (R) in close contact with the inner wall of the conduit (P) (S4);

Step 5 of filling mortar between the liner R and an inner wall of the pipe line P;

It consists of six steps (S6) to cure the mortar.

The process of the present invention will now be described in detail.

As shown in Fig. 2 (a), the inside of the target pipe (P) is irradiated to cut, dredging and high-pressure cleaning so that there are no obstacles such as deposits, tree roots, connecting pipe protrusions.

Thereafter, a deodorization membrane is installed in preparation for infiltration. In other words, if groundwater or surface water comes out, or if the external water is noticeably flooded due to damage to the pipeline, the sewer pipe may be drained by appropriate injection methods such as Posatryn, Seal-i-Tryn, and PU injection before lining. It is necessary to prevent.

Stage 1

Figure 2 (b) is a view showing a state in which a liner is inserted into the pipeline.

As shown in FIG. 2B, in step S1, the liner R is inserted into the pipe P to be in close contact with the inner wall.

The liner R is inserted into the pipe line P while being bent in a cylindrical shape as a plate shape, and further includes step 1-1 for bending both ends after bending in a cylindrical shape.

The liner R is formed with a plurality of protrusions R-1 having a predetermined length on the outer surface to form a predetermined spaced apart from the inner wall of the pipeline P.

The bonding method is a thermal fusion method is applied by applying a high temperature heat.

The liner R is preferably made of high density polyethylene (HDPE) material having good flexibility and durability.

Tables 1 to 3 below show the properties of the high density polyethylene (HDPE) used in the present invention.

Table 1 HDPE Physical Properties

[Table 2] HDPE Thermal Properties

[Table 3] HDPE Mechanical Properties

The liner (R) is to use a strong material in case of sharp stones exposed inside the pipeline (P) and extreme cases such as fragments protruding.

The liner (R) is properly inserted into the pipeline (P) by using a winch by adjusting the force and speed.

Step 2

Figure 2 (c) is a view showing a state in which the expansion means is inserted into the liner.

As shown in Fig. 2 (c), the expansion means (T) is inserted into the liner (R) inserted into the conduit (P).

The expansion means (T) is preferably a tube of rubber material in which the volume is expanded when the air or water filled with fluid.

The expansion means (T) is a bar shape having a predetermined length is formed at both ends of the sealing portion, the injection hole (T-4) is formed on one side.

In addition, the expansion means (T) is a plurality of convex portion (T-6) and concave portion (T-7) is formed continuously so that when the fluid is injected, the end portion can be expanded uniformly at the same time.

The expansion means (T) is further provided with a pressure measuring means (T-2) for measuring whether or not filled with the most appropriate pressure.

If excessive pressure is applied, there is a risk of explosion, and if the pressure is insufficient, the air gap between the liner (R) and the pipe (P) is too large to maintain a proper pressure.

The pressure measuring means (T-2) is composed of a sensor inserted into the expansion means (T), and a pressure gauge for displaying the value detected by the sensor, the pressure gauge is a digital or analog method.

In addition, an emergency shut-off device (T-3) that is interlocked with the pressure measuring means (T-2) is further provided.

That is, the emergency shut-off device (T-3) is a safety valve that is installed to prevent a safety accident when charged with excessive pressure is suitable.

The safety valve is preferably installed at the inlet (T-4) side of the tube, it is automatically operated when excessive pressure is filled to forcibly discharge the fluid in the tube.

Step 3

FIG. 2D is a view showing a state in which packers are provided at both ends of the pipeline.

As shown in (d) of FIG. 2, after performing the first step (S1) and the second step, packers (F-1, F-2) are installed in both openings of the conduit (P) and sealed.

The packers (F-1, F-2) is expanded by the injection of compressed air generated in the external air compressor (A) to seal the openings at both ends of the pipe, made of a flexible material having a space therein It is formed in a cylindrical shape, the air injection nozzle is formed on one side.

 The high-pressure air is injected through the air injection nozzle to expand and seal the openings on both sides of the conduit P by being in close contact with the inner wall of the opening of the conduit P.

In particular, the packer (F-1, F-2) coupled to one side of the pipe line (P) through the hole through which the hose (T-5) connected to the inlet (T-4) of the expansion means (T) to be described later passes Is formed.

In addition, the mortar inlet 2 is coupled to the packers F-1 and F-2 coupled to the other side of the pipeline P to facilitate mortar injection.

The mortar injection hole 2 is a kind of pipe, and one end of the nozzle 22 is inserted into the space S between the liner R and the pipe line P, and the coupling hole formed at the other end of the pipe connected to the nozzle 22. 24 is formed so as to be exposed to the outside of the packers (F-1, F-2), the mortar injection hose (M-2) is connected to the exposed coupler (24).

On the other hand, referring to Figure 3, the outer side of the packer (F-1, F-2) further comprises the step of installing a fixing device (h) to prevent separation.

The fixing device (h) is a support (h-1) having a predetermined length, one end of the support (h-1) is fixed to the support (h-2) and the other end of the packer (F-1, F- 2) is fixed to the rear of the installation.

4 steps

2 (e) is a view showing a state in which the expansion means is inflated.

As shown in FIG. 2E, the liner R is in close contact with the inner wall of the conduit P by injecting and expanding the fluid into the expansion means T.

The fluid is air or water, and high pressure air is used in this embodiment.

The expansion means (T), that is, the inlet (T-4) of the tube is connected to the hose (T-5) of the air compressor (A) installed on the ground and inflated by injecting high-pressure air, the expanded expansion means ( By pressing the liner R, the liner R may be in close contact with the inner wall of the conduit P.

In addition, the expansion means (T) supports the liner (R) may be excluded from the fear that the shape of the liner 6 due to its weight before the mortar to be described later is cured.

5 steps

When the fourth step is performed, the tip of the protrusion R-1 of the liner comes into contact with the inner wall of the conduit P, and a space S corresponding to the length of the protrusion R-1 is formed.

When the mortar (M) is injected and cured in the separation space (S) formed as described above, the liner (R) and the conduit (P) can be firmly fixed, and the repair work on the damaged portion of the conduit (P) is completed.

The mortar (M) is a fluid mixture mixed with water and cement, there should be no shrinkage during curing and curing, it should not contain chloride, and should be cured in a short time.

Tables 4 to 6 show the properties of the mortar used in the present invention.

[Table 4]

Particle size <0.125mm Mode of transport 20kg bag bundle

Retention time 6 months in a circular package packed in a place without direct sunlight
Storage temperature: Do not go below 10 ℃ at room temperature.

TABLE 5

Density 1.975 ~ 2.1Kg / dm2 Expansion limit > 0.5% of volume Manufacturing time (time to manufacture) 90 minutes at 20 ℃ Manufacturing temperature (component temperature) > + 5 ℃
<+ 40 ℃ Amount of water added 71L water per 20Kg dry weight Firmness Significant fluids (substances with flows such as liquids or gases)

TABLE 6

Mixing of mortar (M) uses a prescribed mixer of PFT type G4 or G5. The mixing procedure in the present invention is an important factor that determines the quality of construction.

In addition, at temperatures below -10 ℃, mortar causes an increase in the curing time, so the temperature of 15-20 ℃ must be maintained in storing materials even in winter.

6 steps

After filling mortar (M), it cures naturally by elapse of time.

After curing is completed, the air injected into the expansion means (T) is removed, and the packer (F-1, F-2) installed at both ends of the pipe line (P) to remove the repair method of the pipe line according to the present invention.

Through the repair method of the present invention as described above, it is possible to repair the broken state by integrating the liner (R) by mortar hardening on the inner wall of the old or damaged pipe (P).

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

1 is a flow chart showing a repair method of a pipeline according to the present invention;

Figure 2 (a) ~ (e) is an exemplary view showing step by step repair process of the pipeline according to the present invention,

Figure 3 is a view showing the overall repair method of the pipeline according to the present invention.

Explanation of symbols on the main parts of the drawings

P: pipeline T: expansion means

R; Liner S: Space

R-1: projection T-2: pressure measuring means

T-3: Emergency Shutoff Device T-4: Inlet

T-6: Convex T-7: Concave

Claims (10)

In the method of repairing the pipe for the sewage pipe, A step of inserting a liner, which is bent in a cylindrical shape, in contact with both ends of the liner, to surround the inner wall of the pipeline; Inserting an expansion means into the inserted liner; Installing a packer at both ends of the conduit to seal the pipe; Injecting and expanding the fluid into the expansion means to bring the liner into close contact with the inner wall of the conduit; Filling mortar between the liner and the inner wall of the conduit; Repair method of the pipeline, characterized in that made. delete The method of claim 1, The liner is a repair method for a pipeline characterized in that a plurality of protrusions having a predetermined length on the outer surface to form a space spaced apart from the inner wall of the sewage pipe. The method of claim 1, The third step is a repair method of the pipeline characterized in that it further comprises the step of fixing by installing a fixing device on the outside of the packer. The method of claim 4, wherein The fixing step is a method for repairing a pipeline, characterized in that one end of the crutch having a predetermined length is fixed to the support and the other end to the rear of the packer. The method of claim 1, Said expansion means of step 3 is a repairing method of the pipe line, characterized in that the volume of the rubber tube is expanded when the fluid is filled with air or water. The method of claim 6, The tube is a repairing method of the pipe line, characterized in that the rod is formed at both ends, the rod-shaped having a predetermined length formed with an injection hole on one side. The method of claim 6, And the convex portion and the concave portion are continuously formed so that the tube can be expanded uniformly. The method of claim 6, And the pressure measuring means for measuring the pressure is further installed in the tube. The method of claim 9, The pressure measuring means includes a sensor inserted into the tube, and a pressure gauge for the pressure gauge for expressing the value detected by the sensor in a digital or analog manner.

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