KR100784617B1 - Method for rehabilitating pipe conduit - Google Patents

Abstract

The present invention relates to a sewage pipe rehabilitation method, and in particular, to pull a flexible tube impregnated with resin into the sewer pipe to be regenerated, and then invert the contact tube without resin impregnation by hydraulic pressure in the flexible tube and at the same time. The present invention relates to a sewage pipe regeneration method in which a sewage pipe is regenerated by being adhered to the inner side and hardened by applying heat.

The present invention for achieving the above object is a sewage pipe rehabilitation method for rehabilitation of sewage pipes by curing the flexible tube and the contact tube impregnated with a resin having a property of curing when heat is applied in close contact with the inner wall of the sewer pipe In

A towing step of pulling the flexible tube into the sewage pipe to be rehabilitated, and the resin of the flexible tube is inverted by the water pressure at the same time in the state that the resin is not impregnated in the flexible tube towed inside the sewage pipe by water pressure And a curing step of supplying heat to the flexible tube and the contact tube in a state of being in close contact with the inner wall of the sewer pipe by the inverting step, and hardening the resin to cure the resin. It provides an effect that can be processed quickly and easily.

Sewer pipe, rehabilitation method, liner, calibration hose, reversal method

Description

Sewer Pipe Reconstruction {Method for rehabilitating pipe conduit}             

1 is a flow chart of the sewage pipe rehabilitation method according to the present invention,

Figure 2 is a schematic diagram showing a traction step in the sewer rehabilitation method according to the present invention,

Figure 3 is a schematic diagram showing an inversion step that begins to reverse the contact tube in the sewer rehabilitation method according to the present invention,

Figure 4 is a schematic diagram showing a curing step in which the contact tube and the flexible tube in the sewage pipe rehabilitation method according to the present invention is cured in a state of being in close contact with the inner wall of the sewer pipe by water pressure,

5 is a partially cutaway perspective view showing an example of a close contact tube that is a calibration tube used in the sewer pipe rehabilitation method according to the present invention;

Figure 6 is a partially cutaway perspective view of the sewage pipe rehabilitation is completed by the sewage pipe rehabilitation method according to the present invention.

<Explanation of symbols on main parts of the drawings>

1: sewer pipe 10: liner

11: flexible tube 12: close tube

20, 20 ': winch

The present invention relates to a sewage pipe rehabilitation method, and in particular, to pull a flexible tube impregnated with resin into the sewer pipe to be regenerated, and then invert the contact tube without resin impregnation by hydraulic pressure in the flexible tube and at the same time. The present invention relates to a sewage pipe regeneration method in which a sewage pipe is regenerated by being adhered to the inner side and hardened by applying heat.

In general, sewage pipes are connected to each home or factory to transport sewage to a sewage treatment plant, and such sewage pipes are installed throughout the city. Since sewer pipes carry sewage and wastewater, they age over time and are corroded by oxidants such as sewage and run out of sewer pipes. If the sewage is leaked out through the old sewer pipe, it causes soil contamination and groundwater contamination.

In order to prevent the contamination of the soil and groundwater, the old sewer pipes are replaced. To replace the sewer pipes, the sewer pipes are buried and the old sewer pipes are separated and a new sewer pipe is buried. Using this excavation method replaces the sewage pipe with a new one, so that the fundamental problem can be solved and only the excavation cost is required. However, the excavation method takes a long time because the sewer pipes need to be replaced after excavating the site where the sewer pipes are buried. Also, when the construction work is carried out in a crowded city center, it causes too much congestion in traffic. Therefore, there is a problem that excessive social overhead costs.

In order to solve the problems of the excavation method, a developed line-in-plated pipe (CIPP) method is installed to prevent the sewage from leaking out of the conduit by installing a liner inside the sewage pipe without digging the sewer pipe. It became.

Such a method is a method for preventing the outflow of sewage to the outside by inserting a tube with a thermosetting resin impregnated inside the sewer pipe to harden, the traction method and the reverse method is used in Korea. The traction method was developed in Korea, and the tube with the coating layer formed on the inner surface and the resin-impregnated surface on the outer surface was pulled into the sewer pipe, and then expanded by supplying air pressure or hydrostatic pressure therein, and the outer surface of the sewage pipe was expanded. The tube is cured by supplying heat while being in close contact with it. This traction method is not used well because the thickness of the finished lining pipe in some cases a certain situation occurs to inhibit the flow of sewage.

In the reverse method, a resin-impregnated surface is formed on the inner surface, and a coated tube is installed inside the sewer pipe on the outer surface, and then inverted and heated so that the coated surface becomes the inner surface and the surface impregnated with the resin becomes the outer surface. It is a method that is hardly adhered to the inside, and the finished form is denser than that of the traction method, and it is used in many cases, but when the thickness of the tube becomes thick according to the design conditions because the inversion is performed in the state where the thermosetting resin is impregnated. There is a problem in that the thickness of the tube becomes thick and the inversion is not easy.

The present invention has been made in order to solve the above problems of the prior art, by pulling the flexible tube impregnated with the resin to the sewer pipe to be rehabilitation, and then by the hydraulic pressure inside the pulled flexible tube the close contact tube not impregnated with the resin After reversing, supply the heat so that the flexible tube and the contact tube are hardened in close contact with the inner wall of the sewer pipe so that the rehabilitation pipe can be reconstructed so that the reversal of the contact tube can be easily performed, thereby improving workability. The purpose is to provide a method.

The sewage pipe rehabilitation method according to the present invention is a sewage pipe rehabilitation method for rehabilitation of sewage pipes by curing a flexible tube and a close contact tube impregnated with a resin having a property of curing when heat is applied to the inner wall of the sewer pipe. Towing the flexible tube into the sewage pipe to be rehabilitation, and the resin tube of the flexible tube inverted by the water pressure at the same time the resin tube is not impregnated in the flexible tube towed inside the sewer pipe And a hardening step of supplying heat to the flexible tube and the close contact tube in a state of being in close contact with the inner wall of the sewer pipe by the reversing step, and impregnating the close contact tube.

In addition, the sewage pipe regeneration method according to the invention is characterized in that the resin impregnated in the flexible tube is any material selected from unsaturated polyester, epoxy, epoxy vinyl ester.

In addition, the sewage pipe rehabilitation method according to the present invention is characterized in that the flexible tube consists of any one coating layer selected from polyethylene or polyurethane and a fibrous nonwoven layer impregnated with the resin.

In addition, in the sewage pipe regeneration method according to the present invention, any one coating layer selected from polyethylene or polyurethane is formed on the outer surface of the sewage pipe regeneration method, and a polyester woven fabric, a polyester nonwoven fabric, or a glass fiber woven fabric is formed therein. It is characterized by consisting of at least one fibrous layer selected from. In this case, the polyester woven fabric or the glass fiber woven fabric may have various compositions according to the weaving method.

In addition, the sewage pipe rehabilitation method according to the present invention is characterized in that the sewage pipe rehabilitation method further comprises a cleaning step of removing the sediment inside the sewer pipe before the towing step.

In addition, the sewage pipe rehabilitation method according to the present invention is characterized in that the curing step inverts the tight tube and at the same time the water supplied to be in close contact with the inner wall of the sewer pipe with the flexible tube to cure the resin.

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

Sewage pipe rehabilitation method according to the present invention is a sewage pipe cleaning operation (S ₁ ) to remove all the sediment inside the sewage pipe (1), as shown in Figure 1, the tube 11, the inside of the sewer pipe (1, 12) Sewage pipe inspection operation (S ₂ ) to check and remove all obstacles that may interfere with the installation of the water, and water work to prevent the flow of sewage during the operation inside the sewage pipe (1) to be rehabilitated (S ₃ ) And a flexible tube traction step (S) for pulling the flexible tube (11) impregnated with resin into the sewer pipe (1) in a state where all of the above preparations (S ₁ , S ₂ , S ₃ ) are completely completed. ₄ ) and the close contact tube inversion step (S ₅ ) for inverting the close contact tube (12), which is a calibration tube, inside the flexible tube (11) pulled by water pressure, and the flexible tube on the inner wall of the sewer pipe (1) by water pressure. (11) and the close contact tube 12 to provide a water pressure in a state of being completely in contact By a heat source supply such that the resin is cured impregnated by supplied by circulating the heat curing step (S _6), and the last check the liner 10 is completed, remove the water and provides a water pressure, and then finishing the finish step of It consists of (S ₇ ).

Of course, traffic control must be followed to safely proceed with the above operations.

The cleaning operation (S ₁ ) is performed to prevent contamination or damage of the liner 10 by the correct construction and deposits before installing the liner 10, before the operation of the presence of toxic or flammable gas It is important to check the presence and lack of oxygen before proceeding to ensure worker safety.

The sewage pipe inspection work (S ₂ ) is to observe the installation to interfere with the liner 10 when it is installed, if it can not be removed or removed must be redesigned construction.

The water turning operation (S ₃ ) is to prevent sewage from penetrating into the sewer pipe (1) to be repaired during construction, and it is common to perform the pumping operation from an upstream point to a downstream point or an adjacent water system.

When the preparatory work (S ₁ , S ₂ , S ₃ ) as described above is completed, the installation of the liner 10 is started. The flexible tube 11 is typically impermeable to the outside as shown in FIG. 6. It consists of a coating layer (11a) and consists of a woven or nonwoven fabric (11b), which can be impregnated with an unsaturated polyester resin, on the inside of the refrigeration truck to a working position, in which the resin is impregnated using a roller system in a factory or the like before construction. Being carried by Instead of unsaturated polyester, it is also possible to use epoxy or epoxy vinyl ester which exhibits the same property of curing when heat is supplied. The conveyed flexible tube 11 is towed by the winch 20 into the sewer pipe 1 to be repaired by the winch while the resin is impregnated, and typically uses an existing manhole or other accessible entrance. The vehicle is towed to the next designated manhole or construction end point. A schematic illustration of this is shown in FIG. 2.

After the towing of the flexible tube 11 is completed as described above, the contact tube 12 is inverted by the hydraulic pressure from the starting point to be in close contact with the inside of the sewer pipe (1) with the flexible tube (11). A schematic illustration of this is shown in FIG. 3. The close contact tube 12 used in the rehabilitation method according to the present invention uses a close contact tube 12 as shown in FIG. 5, and the close contact tube 12 has a polyethylene or polyurethane coating layer 12a from the outside. , Polyester woven fabric 12b, polyester nonwoven fabric 12c, polyester woven fabric 12d, in that order, and a glass fiber woven fabric may be used instead of polyester woven fabrics 12b and 12d. Further, the polyester woven fabric and the glass fiber woven fabric may use a woven fabric formed so that the fibers thereof are parallel to the one perpendicular to the longitudinal direction, or a woven fabric formed such that the fibers cross 45 degrees in the longitudinal direction. Therefore, since the close contact tube 12 is to be cured after the inversion, after the installation is completed, the inner surface is turned upside down to be a polyethylene or polyurethane coating layer 12a.

Here, one end of the close contact tube 12 is fixed so that the inversion can be started at the inlet of the manhole and a winch 20 'is attached to the other end so that the close contact tube 12 can be properly reversed while the close contact tube 12 is reversed. Adjust Inverting the close contact tube 12 in this way, as shown in FIG. 4, the close contact tube 12 is inverted by the hydraulic pressure inside the flexible tube 11 and close to the inner wall of the sewer pipe 1. At this time, the resin impregnated in the flexible tube 11 is partially impregnated with the woven or nonwoven fabric of the close contact tube 12.

Here, the water pressure should be able to invert the close tube 12 to the end point, as well as to provide sufficient pressure enough that the flexible tube 11 is in close contact with the wall of the tube 1 and is sufficiently inflated.

As shown in FIG. 4, the close contact tube 12 and the flexible tube 11 are supplied with heat to the inner wall of the sewage conduit 1 in a state of being completely in contact with the water pressure to cure the unsaturated polyester resin. do. In other words, connect a circulator such as a pump to the water providing the water pressure, and also connect the boiler so that the water circulated. As the water circulates through the boiler, the temperature of the water inside the contact tube 12 rises and rises to 60 ° C., and the initial curing of the liner 10 exposed surface is made hard, and the temperature of the water rises further. If it reaches to ℃, the post-cure is achieved. The curing time is preferably maintained for the time recommended by the company that produced the resin.

The hardened liner 10 has a structure as shown in FIG. 6, which is cured in order from the inner side to the close contact tube 12 and the flexible tube 11, such as a polyethylene or polyurethane coating layer ( 12a), polyester or fiberglass woven or nonwoven layer 12b, polyester nonwoven layer 12c, polyester woven or fiberglass woven or nonwoven layer 12d, polyester nonwoven layer 11b, and polyester coating It consists of the layer 11a in order. Of course, each of the nonwoven fabrics or woven fabrics 12b, 12c, 12d, and 11b is in a state where the impregnated unsaturated polyester resin is cured, hardened, and integrated.

When the liner 10 is hardened and completed as described above, the finishing step is performed. The hole is drilled in the downstream end to drain the water, and the both ends of the liner 10 are drilled. Turn off twirls and traffic controls.

As described above, the sewage pipe regeneration method according to the present invention provides an effect that the operation can proceed quickly and easily because the thin tube which is not impregnated with the resin, which is a calibration tube, is pulled by the hydraulic tube and then inverted by water pressure. .

In addition, the method according to the present invention, unlike the calibration hose that serves as a simple air bag, the adhesion tube provides the effect of improving the material properties by using a combination of polyester and non-woven fabric or glass fibers in the flexible tube.

In addition, the method according to the present invention provides an effect that the unsaturated polyester resin is cured in a state of not in contact with the moisture with the conventional inversion method or the traction ball bob.

The present invention is not limited to the above embodiments and can be variously modified and implemented by those skilled in the art without departing from the technical gist of the present invention.

Claims (6)

In the sewer pipe regeneration method of rehabilitation of the sewer pipe by curing the flexible tube and the contact tube impregnated with a resin having a property of curing heat in close contact with the inner wall of the sewer pipe, A towing step of pulling the flexible tube into the sewage pipe to be rehabilitated, and the resin of the flexible tube is inverted by the water pressure at the same time in the state that the resin is not impregnated in the flexible tube towed inside the sewage pipe by water pressure An inversion step impregnated in the close contact tube, and a hardening step in which the resin is cured by supplying heat to the flexible tube and the close contact tube in close contact with the inner wall of the sewer pipe by the inversion step, Sewage pipe rehabilitation method characterized in that the inner surface of the close contact tube in the inversion step is a polyester woven fabric and a glass fiber woven fabric is installed so as to cross each other at an angle of 45 degrees to the axial direction of the tube. The method of claim 1, Resin impregnated in the flexible tube is a sewage pipe regeneration method, characterized in that any one selected from unsaturated polyester, epoxy, epoxy vinyl ester. The method of claim 2, The flexible tube is a sewer pipe rehabilitation method, characterized in that consisting of a polyethylene coating layer and a fibrous nonwoven fabric impregnated with the resin. delete The method of claim 1, The sewer pipe rehabilitation method further comprises a cleaning step of removing the sediment inside the sewer pipe before the traction step. The method of claim 1, The curing step is a reverse sewer pipe rehabilitation method characterized in that the resin is cured by heating the water supplied to be in close contact with the inner wall of the sewer pipe with the flexible tube while at the same time.

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