JP3162098B2 - Repair structure for underground pipeline and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair structure for an underground pipe such as a drain pipe buried underground and a method of manufacturing the same.

[0002]

Underground conduit such BACKGROUND ART drain pipe buried in the ground is sometimes by a large soil pressure and aging, etc. results in a connection and <br/> beauty crack fire body.

[0003] Such cracks are generated in underground pipes underground.
Increasing the processing load in the subsequent processing facility by mixing water
This is a problem, and the wastewater flowing through the underground pipeline will be mixed into the groundwater, causing pollution.

Therefore, conventionally, for example, as shown in FIG.
There is

[0005] In FIG. 5, reference numeral 51 denotes an underground pipe, and 52 denotes a ground.
A crack formed in the lower conduit 51 is shown.
52 is a repair tube 53 from the inside of the underground conduit 51
It has been repaired.

The repair tube 53 is impregnated with a synthetic resin.
Base material 54 and an inner peripheral surface side of the base material 54
An inner coating layer 55 and an outer peripheral side of the base material 54
This is formed with the outer covering layer 56.

The outer covering layer 56 has many trees.
A fat permeable hole 57 is formed.
When constructing the inner peripheral surface of the underground conduit 51 of No. 3
The liquid mixture held by the base material 54 through the oil permeable hole 57
The resin is leached to the inner peripheral side of the underground conduit 51, and the
When the tube 53 is bonded and fixed to the inner peripheral surface of the underground conduit 51,
First, the crack 52 is filled with a synthetic resin.
It is what it was.

That is, in the conventional technique,
Synthetic resin is included because cracks need to be filled with synthetic resin.
Forming the inner coating layer of a dipped substrate with an impermeable sheet
Also, a number of resin permeable holes are formed in the outer coating layer of the fiber material.
Are formed and the water impermeability is not maintained.

[0009] In addition, a synthetic resin containing a fibrous material and solidified
The base material is difficult to completely impervious to water
It is.

[0010] Therefore, the watertightness of such a conventional repairing structure.
The property depends only on the water-impermeable sheet material on the inner surface side
It has become.

[0011]

By the way, underground pipes
Since external pressure such as groundwater acts on the outer surface,
This may cause the inner coating layer to peel off from the substrate.
At the same time, the inner surface of the underground pipeline will be damaged by long-term use due to drainage and foreign substances mixed into it,
With such a conventional repair structure, it is difficult to ensure complete water impermeability over a long period of time.

In addition, during the construction of such a repair structure, the synthetic resin is exposed as described above , and
To be shall infiltrated, underground to penetrate and off-flavors such as synthetic resin becomes the cause of an inevitable pollution you it also.

The present invention has been made in view of such circumstances, and is a repair structure capable of securing good watertightness over a long period of time. The purpose is to provide one that is less likely to occur.

[0014]

In order to achieve this object, the invention of claim 1 is to cover the outer surface side of a base layer in which a fiber layer is supersaturated with a synthetic resin by a water-impermeable outer surface layer. Forming a cylindrical first liner member integrally, and covering the inner surface side of the base material layer in which the fibrous layer is unsaturatedly impregnated with the synthetic resin with a water-impermeable inner surface layer portion; The member is formed integrally, the first liner member is disposed on the inner surface of the underground conduit, and the second liner member is mounted by aligning the base material layers inside the first liner member. It is a repair structure for underground pipelines. Claim 2
In the invention, a cylindrical first liner member integrally formed by covering an outer surface side of a base material layer in which a fiber layer is impregnated with a synthetic resin with an impermeable outer surface layer portion is disposed on an inner surface of an underground conduit. A cylindrical second liner member integrally formed by covering the outer surface side of the base material layer in which the fiber layer is impregnated with the synthetic resin with the water-impermeable inner surface layer portion from one end side of the first liner member, A method for manufacturing a repair structure for underground pipelines, wherein the substrate layer is mounted inside the first liner member while being inverted so as to match the base layers. Further, in the invention according to claim 3, in claim 2, the base layer of the first liner member is supersaturated with the synthetic resin, and the base layer of the second liner member is The synthetic resin is impregnated unsaturatedly, and when the second liner member is mounted on the first liner member,
A part of the synthetic resin from the base layer of the liner member is absorbed by the base layer of the second liner member.

[0015]

According to the first aspect of the present invention, the surface layer portions on both the inner and outer sides of the liner are made water-impermeable, and the synthetic resin is interposed therebetween, so that the synthetic resin is not exposed, and It is possible to reduce the penetration of odors and the generation of off-flavors.

Further , the outer surface layer of the liner is made impermeable to water.
External pressure due to groundwater, etc.
It does not act directly on the surface and may damage the inner surface layer.
It alleviates.

Furthermore, even if the inner surface layer of the liner is damaged due to long-term use, good water impermeability can be maintained while the outer layer surface is protected by the base material layer. In addition, since drainage and the like do not pass through the base material layer, deterioration of the base material layer is reduced, and the structural strength of the liner can be maintained for a long time. The non-saturated fiber layer of the synthetic resin has flexibility, and the synthetic resin is pressed against the supersaturated fiber layer without reducing the pressing force, so that strong bonding can be performed. In the combined base layer, the excess synthetic resin is absorbed by the non-saturated fiber layer from the fiber layer in which the synthetic resin is supersaturated due to compression, and the synthetic resin is uniformly impregnated to become a strong plastic.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings. For convenience of description, a method of manufacturing the repair structure of the present application will be described first with reference to FIGS.

In FIG. 3, reference numeral 1 denotes a drainage pipe as an underground pipe, and 2 denotes a manhole, both of which are molded products such as concrete and are buried underground.

In this embodiment, the liner 3 as the repair structure is formed over the entire length of the drain pipe 1 between the manholes 2 which are separately installed.

As shown in cross section in FIG. 1, the liner 3 includes a first liner member 11 composed of an outer surface layer 4 and a first fiber layer 5, an inner surface layer 6 and a second fiber layer 7 And the second liner member 12 comprising:

Each of the outer surface layer portion 4 and the inner surface layer portion 6 is formed by forming a sheet material made of a water-impermeable synthetic resin such as polyethylene or polypropylene into a tubular shape. No holes or the like are formed in the outer surface layer portion 4 and the inner surface layer portion 6, and complete impermeability between the inside and the outside is ensured.

Each of the first and second fiber layers 5 and 7 is a base layer according to the present invention,
Represents the first base material layer, and the second fiber layer 7 corresponds to the second base material layer. The first and second fiber layers 5 and 7 are made of, for example, glass fiber or polyester fiber.

The first liner member 11 is formed by integrally adhering the first fiber layer 5 to the inner surface side of the outer surface layer portion 4, and the first fiber layer 5 is in a liquid state. Impregnated with a synthetic resin that cures with time, for example, an unsaturated polyester resin or an epoxy resin.

It is to be noted that the resin is hardened by heat or ultraviolet rays.
It is also possible to use a synthetic resin to be converted.

The amount of the resin impregnated in the first fiber layer 5 in this embodiment is, for example, about 110% when the amount (saturation) that the first fiber layer 5 can impregnate is 100%. In a supersaturated state.

Therefore, the entire area of the first fiber layer 5 is completely impregnated with the synthetic resin, and there is no part that is not impregnated with the synthetic resin.

As will be described later, the second liner member 12 is mounted so that the inside and outside are reversed at the time of construction so that the inner surface layer 6 is inside and the second fiber layer 7 is outside. In the state of (2), like the first liner member 11, the second fiber layer 7 is provided on the inner surface layer 6 in a state where the second fiber layer 7 is located inside the inner surface layer 6.
Are integrally formed in close contact with each other.

Unlike the first fiber layer 5, the second fiber layer 7 of the second liner member 12 is not impregnated with a synthetic resin at all and is in an unsaturated state of the synthetic resin. . This is because the second fiber layer 7 absorbs excess synthetic resin impregnated in the first fiber layer 5 as described later.

The second fiber layer 7 may be impregnated with the synthetic resin to some extent in an unsaturated state. In this case, it is preferable that the absorption of the excess synthetic resin is not impaired.

A liner 3 is formed in the drain pipe 1 using the first and second liner members 11 and 12 as follows.

That is, first, the first liner member 11 is inserted from one manhole 2 and is positioned in a predetermined state over the entire length of the drain pipe 1 between the manholes 2.

Thereafter, the end portion 11a of the first liner member 11 facing one manhole 2 is widened, and the end portion 12a of the second liner member 12 is slightly inserted inside the end portion 11a. (See FIG. 4).

Thus, the first liner member 11
The surface of the first fiber layer 5 and the surface of the fiber layer 7 of the second liner member 12 are brought into contact with each other.

Thereafter, when a required water pressure is applied to the inside of the tip portion 12a of the second liner member 12 by a water supply device 13 such as a pump or a water head pressure of a water tank , the water pressure causes The reversal of the second liner member 12 proceeds to the back of the first liner member 11, and the second liner 12 is mounted inside the first liner member 11.

If the other end 12b of the second liner member 12 is bound in a watertight state, the other end 12b is not inverted, and the inside of the second liner member 12 has a bottom. Water supply device 13
Pressure acts outward from the inner surface layer portion 6, and the first fiber layer 5 and the second fiber layer 7 can be maintained in a mutually pressurized state. In this case, the second fiber layer 7 not impregnated with the synthetic resin is pressed against the first fiber layer 5 impregnated with a large amount of the synthetic resin. Act on.

In this state, the second fiber layer 7 not impregnated with the synthetic resin is pressed against the first fiber layer 5 impregnated with the synthetic resin excessively by water pressure. Excess synthetic resin impregnated in one fiber layer 5 is absorbed by the second fiber layer 7.

[0038] Therefore, the first fiber layer 5 can be reliably impregnated with the synthetic resin in a substantially saturated state, and can reliably exhibit a predetermined strength as a fiber-reinforced plastic, and the synthetic resin has a high density. Can be prevented, so that the risk of water leakage due to imperfect impregnation with the synthetic resin and the irregular cross-sectional shape of the drain pipe 1 can be reduced.

In this state, waiting for the synthetic resin to cure,
After the synthetic resin is properly cured, the second liner member 12
2 and the other end 12b of the second liner member 12 is cut off to form a drain pipe 1 shown in FIG.
To obtain a liner 3.

It is needless to say that the ends on both sides of the liner 3 thus formed are subjected to appropriate terminal treatment such as waterproofing from the manholes 2 on both sides where these ends are located.

The liner 3 thus formed is
As shown in FIGS.

The liner 3 is formed entirely along the inner surface of the drain pipe 1 and between the two manholes 2.

In this liner 3, the drain pipe 1
The outer surface layer 4 made of a water-impermeable sheet material is located on the outer surface of the liner 3 facing the inner surface of the liner 3.
On the wall surface of the pipe line of the repaired drain pipe 1, the inner surface layer portion 6 also made of an impermeable sheet material is located.

The first fiber layer 5 and the second fiber layer 7 are provided between the outer surface layer 4 and the inner surface layer 6.
Are opposed to each other and are integrally formed in close contact with each other.

In the fiber layers 5 and 7, as described above, a fiber such as glass fiber and a resin such as unsaturated polyester are co-cured and cured, so that a so-called fiber reinforced plastic is formed. .

Particularly, in the portion of the first fiber layer 5, the excess synthetic resin was applied before the application, and then the excess of the synthetic resin was reduced to the second level as described above. Therefore, good fiber-reinforced plastic is reliably formed as a whole because the fiber layer 7 has been absorbed.

Therefore, although the strength of the liner 3 is generally borne by the portion of the first fiber layer 5, uniform strength can be ensured throughout the circumferential direction and the axial direction of the liner 3. .

As described above, in the liner 3 of this embodiment, since the fiber reinforced plastic which is entirely uniform is formed and impregnation of the synthetic resin does not occur, there is little risk of water leakage.

In addition, a water-impermeable outer surface portion 4 is formed on the outer peripheral side of the first fiber layer 5, and the water-impermeable outer surface portion 4 is provided on the first fiber layer 5 from the pipe side. As it is protected by the fiber reinforced plastic layer formed by 5, the water impermeability of the outer surface layer 4 may be impaired by drainage or foreign matter inside the pipeline unless the inner surface layer 6 and the fiber layer 5.7 are damaged. At the same time, since the water-impermeable outer surface layer 4 is provided outside these fiber-reinforced plastic layers, there is no flow of drainage or groundwater between the inside and outside of the liner 3 through the fiber-reinforced plastic layers. In addition, deterioration of the fiber reinforced plastic layer is reduced.

If the outer surface layer 4 is not impermeable to water, especially if the fiber layers 5 and 7 are not sufficiently impregnated with the synthetic resin, the underground water pressure and the like will crack through the inner surface layer 6. The outer surface layer portion 4 of the present invention has a function of preventing this since the outer surface layer portion 4 of the present application is impermeable to water.

At the time of forming the liner 3 of this embodiment, the synthetic resin is substantially sealed between the water-impermeable outer surface layer 4 and the inner surface layer 6, so that the synthetic resin is grounded as in the prior art. Penetration and unpleasant odor are greatly suppressed, and there is no danger of pollution.

In the embodiment described above, the first fiber layer 5 of the first liner member 11 is impregnated with an excessive amount of synthetic resin, and the second liner member 12 is provided with the second fiber layer 7. If the excess synthetic resin is absorbed, but the first fibrous layer 5 of the first liner member 11 is to be impregnated with an amount of synthetic resin which is substantially saturated, the second liner member 12 The installation of the second fiber layer 7 can be omitted.

Further, in this embodiment, the fiber layers 5 and 5
Although each of the fiber layers 5 and 7 is formed as a single layer, the fiber layers 5 and 7 may be formed as a multi-layer structure. It is also possible to operate in the same manner as described above and omit the impregnation of the remaining layer with the synthetic resin.

In the above embodiment, the fibrous layers 5 and 7 are used as the base material impregnated with and held by the synthetic resin and absorb the excess synthetic resin. However, the present invention is not limited to this. It goes without saying that any substance can be used.

Further, in the above embodiment, the liner 3 is formed by using the first and second two liner members 11 and 12, but the present invention is similarly applied to a single liner member. A liner can be formed.

In this case, a fiber layer impregnated with an unsaturated polyester resin or the like is appropriately sealed between the outer surface layer portion 4 and the inner surface layer portion 6 as described above, and this is inserted into the drain pipe 1. What should be done.

[0057]

As described above, according to the first aspect of the present invention, both the outer and inner surface layers of the liner are made impermeable, and the synthetic resin is interposed therebetween.
Since the synthetic resin is not exposed, it is possible to reduce the penetration of the synthetic resin into the ground and the generation of an odor.

Further , the outer surface layer of the liner is made impermeable to water.
External pressure due to groundwater, etc.
It does not act directly on the surface and may damage the inner surface layer.
It alleviates.

Further, after long-term use, the inside of the liner
Even if the surface layer was damaged, the outer surface layer was protected by the base material layer
Since good water impermeability can be maintained in a state,
That water tightness can be secured over a long period of time
In addition, since drainage does not penetrate through the base material layer,
Deterioration of the liner and the required structural strength of the liner for a long time
Can be maintained across.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA of FIG.

FIG. 2 is an overall sectional view of a repaired drain pipe according to the embodiment.

FIG. 3 is an explanatory diagram of a drain pipe repair operation according to the present application.

FIG. 4 is an enlarged sectional view of a main part of FIG.

FIG. 5 is an explanatory diagram of a conventional repair of an underground pipe.

Claims (3)

(57) [Claims] 1. A tubular first liner member is integrally formed by covering an outer surface side of a base layer in which a synthetic resin is supersaturated into a fiber layer with a water-impermeable outer surface layer, and forming a first liner member integrally with the fiber layer. A cylindrical second liner member is integrally formed by covering the inner surface side of the base material layer impregnated with the resin with the water-impermeable inner surface layer portion, and the first liner member is provided on the inner surface of the underground pipe. A repair structure for an underground pipeline, wherein the second liner member is attached to the inside of the first liner member by aligning the base material layers. 2. A tubular first liner member integrally formed by covering an outer surface side of a base material layer in which a fibrous layer is impregnated with a synthetic resin with an impermeable outer surface layer portion is provided on an inner surface of an underground conduit. Then, a cylindrical second liner member integrally formed by covering the outer surface side of the base material layer in which the fiber layer is impregnated with the synthetic resin with the water-impermeable inner surface layer portion from one end side of the first liner member. A method of manufacturing a repair structure for an underground pipeline, wherein the substrate layer is mounted inside the first liner member while being inverted so that the base layers are aligned with each other. 3. The base material layer of the first liner member according to claim 2, wherein the base material layer of the first liner member is supersaturated with the synthetic resin, and the base material layer of the second liner member is the synthetic resin. Is impregnated unsaturatedly, and when the second liner member is mounted on the first liner member, part of the synthetic resin from the base material layer of the first liner member becomes the second liner member. A method for manufacturing a repair structure for underground pipelines, wherein the repair structure is absorbed by the base material layer of the liner member.