JP6125285B2 - Lining material and pipeline repair method - Google Patents

Description

  The present invention relates to a lining material for repairing a deteriorated inner peripheral surface of a pipe line, and in particular, even when a rupture occurs in an impregnated layer hardened due to an earthquake, ground displacement or unequal subsidence, ensures water-stopping properties. The present invention relates to a lining material that can be repaired, and a repair method that repairs the inner peripheral surface of a pipe line using the lining material.

  At present, many pipes such as pipes for sewers, pipes for industrial water, and pipes for agricultural water are laid and used. As these pipes are used, the inner peripheral surface deteriorates as the period of use increases, and concrete aggregates are exposed. The pipes that make up the pipes can be pulled out at seams due to the effects of land subsidence and earthquakes. Misalignment may occur. As described above, the strength of pipes with deteriorated inner peripheral surfaces may be reduced, and the pipes with misalignment at the seams may be leaked. Therefore, the inner peripheral surfaces are repaired by lining them. It has been broken.

  Many proposals have been made as a lining method for repairing the inner peripheral surface of a pipe line. Among them, there is a method using a fiber hose (lining material) impregnated with a resin (for example, see Patent Document 1). . In this method, a fiber hose impregnated with a resin containing a photoinitiator and / or an organic peroxide is placed in a conduit, and the fiber hose is inflated with compressed air to adhere to the inner wall of the conduit, and UV light is applied to the fiber hose. The conduit is lined by irradiating and curing the resin. The fiber hose used in the construction of this method is a curable material containing a photoinitiator and / or an organic peroxide in a woven form such as glass fiber or synthetic fiber, a needle processed non-woven fabric, a mat or a felt-like fibrous reinforcing material. It is configured by impregnating with resin.

  Patent Document 2 describes that a lining layer is formed using a lining material in which a fiber base material is impregnated with a thermosetting resin or a lining material in which a photocurable resin and a thermosetting resin are impregnated. ing. In particular, the present invention relates to a lining material for pipe rehabilitation containing both a photocurable resin and a thermosetting resin, a photocurable resin layer on the inner peripheral surface side, and a thermosetting resin on the outer peripheral surface side. A layer is formed.

  Patent Document 2 describes that a lining material may be made into two layers by superimposing a base material impregnated with a photocurable resin and another base material impregnated with a thermosetting resin. . In this case, the thermosetting resin can be cured by reaction heat generated when the lining material is irradiated with light and the photocurable resin is cured.

  By implementing any of the methods described in Patent Documents 1 and 2 above, it is possible to improve the strength of the pipe line where the inner peripheral surface is deteriorated and the strength is lowered, and the two manholes are continuously connected. By repairing with the lining layer, water leakage can be prevented even when there is a deviation in the joints of the pipes constituting the pipe line.

  The lining material configured as described above is arranged so that the impregnated resin does not leak when the fibrous reinforcing material or the fiber base material is impregnated with the resin. Cylindrical films are respectively arranged on the surface side. These films are arranged at the time of manufacturing the lining material, and are kept as they are while being transported to the construction site and repairing the pipeline.

  When repairing a pipeline, when compressed air is applied to the inside of the uncured lining material to expand it, the outer peripheral surface of the lining material contacts the rough rough surface of the inner peripheral surface of the pipeline via a film. Will be. For this reason, the lining material is substantially integrated with the inner peripheral surface of the pipe constituting the pipe, but the gap between the pipes is not integrated with the pipe. . Then, after the lining material is cured, the film on the inner peripheral surface side is removed, but the film on the outer peripheral surface side is left in a state where it is simply in contact with the inner wall surface of the pipe.

  On the other hand, according to the idea of pipe seismic design, pipes laid in the ground are required to allow an elongation of about 1.5% as a permanent strain during an earthquake, although it depends on ground conditions. . For example, when the distance between manholes is 30 m, an extension of about 45 cm is allowed. This dimension can be absorbed by a shift in the axial direction of a joint portion between pipes in the case of a pipe line constituted by connecting a plurality of pipes. In addition to axial forces, pipes are also subjected to bending forces due to large displacements of the ground, including earthquakes and land subsidence, and uneven subsidence. The pipes may bend each other.

  When the fiber base material which comprises a lining material is glass fiber, although the hardened cylindrical lining material exhibits high intensity | strength, it becomes very difficult to extend. For this reason, it is not possible to follow the displacement of the pipeline due to the earthquake, and local breakage occurs in many glass fibers arranged in the axial direction of the lining material, and corresponding to the broken part of the glass fiber in the cured resin There is a risk that cracks will be formed (hereinafter, such a state is referred to as “rupture”).

  That is, when an axial force is applied to the pipeline during an earthquake, the hardened lining material behaves while being restrained by the outer tube. Accordingly, the cured lining material is concentrated at the portion corresponding to the joint between the tubes, and the excessive force acts on the glass fiber arranged in the axial direction at this portion to break. It will be. The breakage sites in many glass fibers are in an unmanaged state and are not necessarily located on the same circumference. Then, cracks are formed in the cured resin corresponding to the broken portion of the glass fiber and break. At this time, the film disposed on the outer peripheral surface of the lining material may be rubbed or stretched with the inner peripheral surface of the tube and may be damaged.

  Similarly, when the ground is greatly displaced or unevenly subsidized, such as when the ground is subsidized, the film is damaged or hardened due to the tensile or bending force acting on the joints of the pipes that make up the pipe. There is a risk of breakage of the material. In other words, the cured lining material may break due to the force acting on the seam portion, or the film disposed on the outer peripheral surface of the lining material may be rubbed and damaged by the pipe end or inner peripheral surface at the seam portion. is there.

  In the case of a general pipe line laid in the ground, a pressure of about 0.01 MPa to 0.05 MPa is applied to the outer peripheral portion of the pipe line by earth and sand or groundwater. For this reason, when the film arrange | positioned on the outer peripheral surface of a lining material breaks, there exists a possibility that groundwater may infiltrate from the damaged part of a film, and may leak between this film and the hardened lining material. Further, when the cured lining material is broken, there is a risk that groundwater leaks through the broken portion.

  In order to solve the above-mentioned problem, that is, the problem that the film integrated with the outer peripheral surface of the lining material and opposed to the inner peripheral surface of the pipeline may be damaged due to an earthquake, displacement of the ground or uneven settlement. The inventors have developed the lining material described in Patent Document 3. This lining material was formed by adhering a film (outer film) such as a water-impermeable and stretchable thermoplastic film or polyurethane film on the outer peripheral surface of an impregnated layer in which a fiber base material was impregnated with a curable resin. Is.

  In the lining material described in Patent Document 3, when the hardened impregnation layer breaks at the time of earthquake or ground displacement or unequal subsidence, the outer film peels off from the impregnation layer and stretches to break the impregnation layer. The part can be covered. For this reason, even if groundwater enters from the joint of the pipe, the groundwater does not enter the pipe line through the lining material.

JP 2003-048248 A JP 2003-033970 A JP 2011-140221 A

  As described above, a film integrated with the outer peripheral surface of the lining material and opposed to the inner peripheral surface of the pipe line represented by Patent Documents 1 and 2 may be damaged due to an earthquake, displacement of the ground, or uneven settlement. The problem described above can be solved by the invention described in Patent Document 3. However, even if the above problem can be solved by the invention described in Patent Document 3, it is the actual situation that it is required to develop another solution.

  The object of the present invention is to provide a lining material capable of ensuring a certain water-stopping property and repair using this lining material even when an impregnated layer that has hardened due to an earthquake, ground displacement or uneven settlement is broken. To provide a construction method.

In order to solve the above-mentioned problems, a lining material according to the present invention is a sleeve-shaped lining material that is disposed inside a pipe and covers the inner surface of the pipe, and a fiber base material having a predetermined thickness. The fiber base material is impregnated with a curable resin; a surface layer material disposed on at least one surface of the impregnated layer ; and a surface layer material disposed on one surface of the impregnated layer And a film disposed on a surface of the impregnated layer where the surface layer material is not disposed, and the surface layer material impregnated a resin with a mat having a predetermined thickness. When the resin impregnated in the mat is cured, the intermediate layer and a surface layer composed of a woven fabric or a nonwoven fabric disposed on both surfaces of the intermediate layer and having one surface attached to the impregnated layer are impermeable to water. And has a greater stretch than the cured impregnated layer That.

  In the lining material described above, the curable resin impregnated in the fiber base material is preferably a photocurable resin, a thermosetting resin, a photocurable resin, or a thermosetting resin.

  In any of the above lining materials, it is preferable that the resin impregnated in the mat constituting the intermediate layer of the surface layer material has light transmittance.

  Further, in any of the above lining materials, when the curable resin impregnated in the fiber base material of the impregnated layer and the resin impregnated in the mat of the surface layer material are cured, the surface layer material becomes the impregnated layer. On the other hand, it preferably has stretchability and peelability.

  In any of the above lining materials, it is preferable that a film is further disposed on the surface layer opposite to the surface layer disposed on the impregnated layer side of the surface material.

  Further, the pipe repair method according to the present invention is a repair method for repairing the inner surface of the pipe using any one of the above lining materials, and any one of the above lining materials is placed inside the pipe to be repaired. The lining material is placed and expanded so as to be close to the inner surface of the pipe line, and then a light irradiation device is inserted into the expanded lining material to irradiate light from the light irradiation device to the lining material, or a heating device The inner surface of the pipeline to be repaired is cured by curing the curable resin and curing the impregnated layer by moving the lining material along the pipeline to be repaired while inserting the lining material by the heating device. It is characterized by this.

  In the lining material of the present invention, when a deteriorated pipe line is reinforced with a hardened lining material, even if the hardened impregnated layer breaks due to displacement or uneven subsidence of the ground including earthquakes and ground subsidence, it is ensured. Water-stopping property can be ensured.

  The lining material according to the present invention includes an impregnation layer in which a fiber base material is impregnated with a curable resin, a surface layer material disposed on at least one surface of the impregnation layer, and a surface layer material in the impregnation layer. The surface layer material is configured to have water permeability and stretchability. And the surface layer material is comprised by the intermediate | middle layer which impregnated resin to the mat | matte, and the surface layer which consists of a woven fabric or a nonwoven fabric arrange | positioned on both surfaces of an intermediate | middle layer, and the surface layer has adhered to the impregnation layer.

  Therefore, even when an impregnated layer that has hardened due to an earthquake, ground displacement or unequal subsidence breaks, the surface layer material can extend following the breakage of the impregnated layer, and the surface layer material is damaged. There is nothing. For this reason, water leakage can be prevented even when the film is broken and the impregnated layer is broken.

  Further, the curable resin impregnated in the fiber base material constituting the lining material is a photocurable resin, a thermosetting resin, a photocurable resin, and a thermosetting resin, and the mat constituting the surface layer material is impregnated. The resin is light transmissive. For this reason, when the lining material arranged in the pipeline is expanded and brought into contact with the inner peripheral surface of the pipeline, when the light is irradiated from the inside of the lining material, the irradiated light reaches the impregnation layer through the surface layer material. Alternatively, the resin reaches the surface layer material through the impregnated layer, and the curable resin of the impregnated layer and the resin of the surface layer material can be cured.

  In addition, when the impregnated layer constituting the lining material is cured, the surface layer material has high stretchability and releasability with respect to the cured impregnated layer, so that even when the impregnated layer breaks and extends, the impregnated layer can be extended. It can follow and stretch.

  Moreover, by disposing the film on the surface layer opposite to the surface layer disposed on the impregnated layer side of the surface layer material, leakage of the curable resin impregnated in the impregnated layer and the resin impregnated in the mat of the surface layer material is prevented. Can be prevented.

  Moreover, in the pipe line repairing method according to the present invention, it is possible to reliably repair the inside of the pipe line to be repaired by using any of the lining materials according to the present invention and to ensure high water-stopping properties even in the event of an earthquake.

It is a front view explaining the structure of the lining material which concerns on a present Example. It is sectional drawing explaining the structure of the lining material which concerns on a present Example. It is a figure explaining the effect | action of the lining material which concerns on a present Example. It is a figure explaining the repair method of the pipe line which concerns on a present Example.

  Hereinafter, preferred embodiments of the lining material according to the present invention will be described. The lining material of the present invention is, for example, a pipe line typified by a sewer pipe, whose inner peripheral surface has deteriorated due to long-term use, or a pipe line that is affected by ground subsidence or an earthquake. It is advantageous for use in repairing a pipe line in which a deviation occurs in the joint between the constituent pipes. In particular, after repairing the pipeline, even if an axial force or bending force is applied to the lining material that has hardened due to an earthquake or large ground displacement or uneven subsidence, it is possible to ensure high water stoppage. It is configured.

  The lining material has a dimension in which the outer diameter is substantially equal to the inner diameter of the pipe line to be repaired, and is formed in a long shape. The length of the lining material is not limited as long as it has a length that can be laid between two manholes provided in a pipeline to be repaired. The lining material is folded and stored in a state in which the curable resin is uncured, that is, in a flexible state, and is used by being transported to a construction site.

  The lining material according to the present invention has an axial force that acts on the pipe line when it is hardened or is subjected to an axial force acting on the pipeline during an earthquake or when a large displacement or uneven settlement occurs on the ground due to ground subsidence or the like. Alternatively, when the cured impregnated layer breaks due to bending force, water leakage into the pipe line can be prevented despite the breakage. That is, even when the cured impregnated layer breaks and the film breaks along with the break, it is possible to prevent the water from entering by covering the broken portion by extending the surface layer material.

  A lining material according to the present invention includes an impregnation layer formed by impregnating a curable resin into a fiber base material having a predetermined thickness, a surface layer material disposed on at least one surface of the impregnation layer, and an impregnation A film disposed on a surface of the layer on which no surface layer material is disposed, and the surface layer material includes an intermediate layer in which a mat having a predetermined thickness is impregnated with a resin, and the intermediate layer It is composed of a woven fabric or a non-woven fabric arranged on both sides, and one surface is attached to the impregnation layer, and is configured to have water permeability and stretchability when the resin impregnated in the mat is cured Has been.

  In the lining material according to the present invention, the thickness of the fiber base material impregnated with the curable resin constituting the impregnation layer is not limited, the fiber material constituting the fiber base material, the diameter of the pipe line to be repaired It is preferable to set appropriately considering various conditions such as required strength.

  As a fiber base material for impregnating a curable resin, a photocurable resin or a thermosetting resin, and further a function of impregnating and holding both a photocurable resin and a thermosetting resin, and their curability Any material that can exhibit strength when the resin is cured may be used. The fiber material constituting such a fiber substrate may be glass fiber or a fiber other than glass fiber, and these fiber materials can be used alone or as a fiber substrate by laminating both fibers. It is. And it is possible to sufficiently and reliably impregnate the curable resin by forming the fiber base material with glass fiber, fiber other than glass fiber, or fiber other than glass fiber and glass fiber, and When the curable resin is cured, the desired strength can be exhibited.

  In particular, when glass fibers and fibers other than glass fibers are used as a fiber base material, the number of layers to be stacked is not limited, and two or more layers may be stacked. Thus, when laminating and using glass fibers and fibers other than glass fibers, at least the glass fibers are on the surface material side (when the inner peripheral surface of the pipeline is lined, the side that becomes the inner peripheral surface of the repaired pipeline). It is preferable to arrange. Since the glass fiber is configured as a woven fabric, it is easy to transmit light, and it is possible to achieve curing by light irradiation by impregnating the glass fiber with a photocurable resin.

  Moreover, it is preferable that it is an organic type fiber as fibers other than the glass fiber which comprises a fiber base material. This organic fiber often has a form as a nonwoven fabric containing felt, and the strength when the impregnated curable resin is cured is lower than the strength of the glass fiber. In addition, when organic fibers are impregnated with a curable resin, the light transmission is lower than glass fibers made of woven fabric. For this reason, it is preferable that the curable resin impregnated into the fiber base made of organic fibers has a light refractive index substantially equal to the light refractive index of the organic fibers.

  For example, when the organic fiber is a polyester fiber, the curable resin to be impregnated is preferably an unsaturated polyester resin. As described above, the light transmittance of the organic fiber and the curable resin impregnated with the organic fiber can be improved so that the light transmittance can be improved. For this reason, when lining a pipe line, it becomes possible to transmit efficiently the light irradiated with the light irradiation apparatus arrange | positioned in a pipe line, and it becomes possible to use photocurable resin as curable resin.

  In particular, when the curable resin has a two-layer structure, the photocurable resin and the thermosetting resin are combined with a resin of the same material (for example, an unsaturated polyester resin) as a photoinitiator or an organic peroxidation as a thermal initiator. It is preferable that the product is contained. In this way, by configuring the photocurable resin and the thermosetting resin using the same resin, the photocurable resin and the thermosetting resin are mixed together and do not interfere with the transmittance of the irradiated light.

  In a lining material impregnated with a thermosetting resin, there is a risk that curing will proceed due to the action of atmospheric heat before it is carried into the construction site. On the other hand, in the lining material impregnated with the photocurable resin, curing does not proceed by using the light shielding film as the inner film disposed on the surface opposite to the outer film or the impregnated layer of the surface layer material. Therefore, the curable resin impregnated in the lining material is preferably a photocurable resin. However, when light is applied to the fiber base impregnated with the curable resin, the thickness in consideration of workability is about 20 mm, and the thickness of the fiber base constituting the lining material is 20 mm or more. In such a case, a two-layer structure with a thermosetting resin is required.

  When the curable resin impregnated into the fiber base material has a two-layer structure, the process in which the photocurable resin is placed inside the pipe (on the side that forms the flow path) and the light irradiation device runs in the pipe It is possible to cure by irradiating light from the light irradiation device.

  As described above, the work for curing the lining material is easier to run the light irradiation device in the pipeline than the entire interior of the pipeline is heated to a high temperature with hot water or steam, and the workability is also good. . Therefore, when the impregnated layer has a two-layer structure of a photocurable resin and a thermosetting resin, the photocurable resin is disposed on the surface layer material side. The thermosetting resin can be cured by reaction heat generated when the photocurable resin is cured.

  The photo-curing resin is not particularly limited, and photoinitiating is performed on the same resin as the photo-curing resin impregnated in a lining material generally used for repairing or rehabilitating pipelines, for example, unsaturated polyester resin or vinyl ester. It may contain a material. Similarly, the thermosetting resin is not particularly limited, and may be an unsaturated polyester resin or vinyl ester which is the same as the photocurable resin and containing an organic peroxide.

  The photocurable resin preferably contains a thickener. The photocurable resin containing a thickener increases in viscosity over time, and it is possible to prevent air from being entrained in the fiber base material and to prevent generation of bubbles. In particular, the manufactured lining material is folded and flattened in an uncured state, and is stored and transported as it is or wound around a bobbin. For this reason, the thickness at the folded corner is thinner than the thickness of the other parts, and when the lining material is expanded during construction, the folded part tries to return to its original thickness. It is possible to prevent the problem that air bubbles are involved and bubbles are generated.

  The film has a function of preventing leakage of the curable resin impregnated in the fiber base material together with the surface layer material when the lining material is manufactured, and when the manufactured lining material is folded, the outer surfaces of the lining material are It has a function to prevent them from adhering to each other. For this reason, any one having the above functions can be used.

  In addition, when the curable resin impregnated in the fiber base material is a photocurable resin, the film is required to have light shielding properties. For this reason, the film needs to have a function of blocking light in addition to the above functions. The light shielding does not mean that light of all wavelengths is blocked, but has the property of blocking light having a wavelength at which the photocurable resin impregnated in the fiber substrate constituting the impregnated layer reacts. It should be. Since a general photocurable resin has a property of reacting to ultraviolet rays, any resin that can block light having a wavelength shorter than 450 nanometers may be used.

  The surface layer material is disposed on at least one surface of the impregnation layer constituting the lining material. That is, the surface layer material is the outer surface side of the impregnation layer (the surface facing the inner wall surface of the pipe when the inner peripheral surface of the pipe line is lined), or the inner surface side of the impregnation layer (the inner peripheral surface of the pipe line is lined) , The inner peripheral surface of the repaired pipeline), or the inner and outer surfaces of the impregnated layer. And a film is arrange | positioned on the surface where the surface layer material of an impregnation layer is not arrange | positioned.

  The surface layer material has non-water permeability and stretchability when cured, and includes an intermediate layer in which a mat having a predetermined thickness is impregnated with a resin, and a woven fabric or a non-woven fabric disposed on both sides of the intermediate layer. And one surface layer is attached to the impregnated layer.

  The mat that forms the intermediate layer of the surface layer material is formed to have a preset thickness with the fibers entangled. The fibers constituting the mat are not particularly limited, and fibers such as natural fibers and synthetic fibers can be selectively used. For example, as described above, it is possible to use a mat as a nonwoven fabric including felt made of organic fibers.

  Further, the thickness of the mat is not particularly limited, and it is preferably set as appropriate in accordance with conditions such as the thickness of the fiber base material constituting the impregnated layer and the material of the curable resin impregnated into the fiber base material. . That is, when the impregnated layer is formed by impregnating a fiber base material with a photocurable resin, as described above, the thickness when the workability is taken into consideration is about 20 mm. It is necessary to satisfy this condition.

  It is preferable that the resin impregnated in the mat has light transmittance. For example, when the fibers constituting the mat are polyester fibers of organic fibers, the resin to be impregnated is preferably a vinyl ester resin or an unsaturated polyester resin. With this combination, it is possible to ensure light transmission. For this reason, even when the surface layer material is on the inner surface side of the impregnation layer, it is possible to transmit the light irradiated by the light irradiation device when lining the pipe line, and the curable resin to be impregnated into the fiber base material of the impregnation layer As a result, it becomes possible to use a photocurable resin.

  The resin impregnated in the mat has different properties from the curable resin impregnated in the fiber base material of the impregnated layer, and the cured surface layer resin is more stretchable than the curable resin of the cured impregnated layer. Have That is, even if both the resin impregnated in the mat and the curable resin impregnated in the fiber base material are unsaturated polyester resins, the stretchability when cured varies depending on the type of compounding agent and the blending ratio. It becomes possible to make it. Similarly, even if both the resin impregnated into the mat and the curable resin impregnated into the fiber base material are vinyl ester resins, the stretchability when cured depends on the type of compounding agent and the mixing ratio. It can be changed.

  The thickness or material of the woven fabric or non-woven fabric constituting the surface layer of the surface material is not particularly limited, and it is preferable to use a material having good adhesion and peelability to the impregnated layer impregnated with the curable resin. That is, when there is no relative movement between the impregnated layer impregnated with the curable resin, the adhesion in a good state is maintained, the tensile force acts on the lining material, elongation occurs, and the impregnated layer breaks. When this occurs, it is preferable that the surface layer material can be easily peeled to allow the elongation of the surface layer material.

  Although the surface layer material configured as described above cannot exhibit a high tensile strength, it has a sufficient extensibility of about 5% to about 10% when the resin is cured. This elongation rate is sufficiently larger than the elongation rate when the curable resin impregnated in the fiber base material is cured. Furthermore, the elongation rate of the surface layer material can sufficiently satisfy the permanent strain consisting of an elongation of about 1.5% that can be tolerated in the event of an earthquake, which is required in pipe seismic design. Therefore, if the pipe is stretched by 1.5% at the time of an earthquake, or if the hardened impregnation layer constituting the lining material breaks due to the change in the ground, the surface material can follow the generated elongation. Is possible.

  For this reason, even when the impregnation layer breaks and the film breaks at the same time, the surface layer material can prevent the ingress of groundwater into the pipeline. That is, when the film is opposed to the inner wall surface of the pipe and the film breaks and the impregnation layer breaks, the surface layer material arranged on the inner surface side of the impregnation layer penetrates through the broken portion of the film and the impregnation layer. It is possible to prevent intrusion into the underground water pipe. In addition, when the surface layer material faces the inner wall surface of the pipe and the film is disposed on the inner surface side of the impregnation layer, even if the impregnation layer breaks and the film is damaged, the surface layer material prevents infiltration of groundwater. Is possible.

  It is preferable to further dispose a film on the side opposite to the surface layer adhering to the impregnated layer of the surface material constituting the lining material. This film has a function to prevent leakage of the curable resin impregnated in the fiber base material when the lining material is manufactured, and the inner surfaces of the lining material adhere to each other when the manufactured lining material is folded. It has the function which prevents that. For this reason, any one having the above functions can be used. And after repairing the target pipe line, it peels from the surface layer material which is a hardened lining material. Such a film is preferably capable of blocking light having a wavelength shorter than 450 nanometers.

  Next, an embodiment of the lining material will be described with reference to FIGS. As described above, the surface layer material only needs to be disposed on at least one surface of the impregnated layer, and may be disposed on both surfaces. And a film is arrange | positioned on the surface of the impregnation layer in which surface material is not arrange | positioned. In the following examples, the surface layer material is disposed on the surface that becomes the inner peripheral surface of the impregnated layer when the pipe line is repaired with the lining material.

  The lining material A shown in the figure is disposed on an impregnation layer 1 in which a fiber base material is impregnated with a curable resin, and on the surface that becomes the outer peripheral surface of the impregnation layer 1 when repairing a target pipe line. The attached outer film (film) 2, the surface layer material 3 disposed on the surface (inner surface) side of the impregnation layer 1 opposite to the surface on which the outer film 2 is disposed, and the inner surface side of the surface layer material 3 It has the inner film (film) 4 arrange | positioned in, and is comprised by elongate shape. The lining material A has a length that can satisfy the distance between two manholes constituting the pipeline to be repaired, and the outer diameter is approximately equal to the diameter of the inner peripheral surface of the pipeline to be repaired. Have.

  The impregnation layer 1 constituting the lining material A is configured by impregnating a fiber base material with a curable resin. As the fiber substrate, glass fibers and felts (nonwoven fabrics) made of polyester fibers as organic fibers are used alone or in a laminated state. And the said fiber base material is impregnated with the photocurable resin and the thermosetting resin independently or by the two-layer structure.

  When the curable resin is cured, if the fiber base material constituting the impregnation layer 1 is composed of glass fibers, it is possible to exhibit higher strength than in the case of organic fibers. For this reason, a fiber base material suitable for the diameter of the pipe line to be repaired and the required strength is selected. In particular, when the fiber substrate is composed only of glass fibers, the thickness of the fiber substrate is about 20 mm at the maximum. Further, when the fiber base is composed of only organic fibers, the thickness may be larger than about 20 mm without any limitation.

  When the fiber base material which comprises the impregnation layer 1 is comprised by the two-layer structure of glass fiber and organic fiber, glass fiber is arrange | positioned at the surface layer material 3 side, and organic fiber is arrange | positioned at the outer film 2 side. The When the impregnated curable resin is cured, the glass fiber and the organic fiber each exhibit a predetermined strength and can reinforce the pipeline.

  When the fiber base material of the impregnated layer 1 is impregnated with the photocurable resin alone, the structure of the fiber base material is not limited, and the glass fiber and the organic fiber are individually or in a laminated state. Even if it is configured, it is possible to cope without problems.

  In addition, when the fiber base material is impregnated with the thermosetting resin alone, the thickness of the fiber base material is not limited. That is, the thickness of the fiber substrate is not limited to about 20 mm, and may be greater than that. Furthermore, the structure of the fiber base material impregnated with the thermosetting resin is not limited, and even if the glass fiber and the organic fiber are composed of a single layer or a laminated state, it can be handled without any problem. is there.

  In particular, when a fiber base material is impregnated with a photocurable resin and a thermosetting resin in a two-layer structure, the photocurable resin is arranged on the surface layer material 3 side, and the thermosetting resin is arranged on the outer film 2 side. The As described above, when the inner peripheral surface of the target pipe line is repaired with a lining material, it is advantageous in terms of work to let the light irradiation device run inside the pipe line and cure, so the photocurable resin is a surface layer. It is arranged on the material 3 side.

  The photocurable resin impregnated on the surface layer material 3 side of the fiber base material constituting the impregnated layer 1 is set to a thickness that allows the light irradiated through the surface layer material 3 to be sufficiently transmitted. That is, it is set in accordance with conditions such as the thickness of the surface layer material 3 and the material of the impregnated resin. However, even if the irradiated light is 100% transmitted through the surface layer material 3, the thickness of the photocurable resin of the impregnation layer 1 is about 20 mm at the maximum. Moreover, the thickness of the thermosetting resin arrange | positioned at the outer film 2 side of the impregnation layer 1 is not limited, The thickness which should impregnate a photocurable resin from the full thickness of the fiber base material which comprises the impregnation layer 1 It is the thickness minus the thickness.

  In particular, when the fiber base material of the impregnation layer 1 is configured by laminating glass fibers and a thermosetting resin, the thickness of each glass fiber and thermosetting resin and the thickness of each curable resin to be impregnated are as follows. There is no need to match.

  The photocurable resin impregnated in the fiber base material constituting the impregnation layer 1 contains a thickener made of magnesium oxide (MgO). By adding a thickening agent to the photocurable resin, the viscosity of the photocuring agent increases with time, and leaks from the surface layer material 3 and the inner film 4 or the outer film 2 during the conveyance process or during storage. There is nothing to do.

  The surface layer material 3 has water permeability and stretchability, an intermediate layer 3a in which a mat having a predetermined thickness is impregnated with a resin, and a surface layer 3b made of a woven fabric or a non-woven fabric disposed on both surfaces of the intermediate layer, 3c. In particular, the surface layer 3b is integrally attached to the impregnation layer 1, and the inner film 4 is attached to the surface layer 3c.

  In this example, the mat constituting the intermediate layer 3a of the surface layer material 3 is formed in a felt shape made of chemically synthesized fibers, and by impregnating the mat with a photocurable vinyl ester resin as a resin, The intermediate layer 3 is configured. The surface layers 3b and 3c use woven fabrics made of chemically synthesized fibers.

  It is possible to ensure good stretchability by forming the intermediate layer 3a constituting the surface layer material 3 by a non-woven mat and forming the surface layers 3b and 3c by non-woven fabrics, respectively. That is, since the intermediate layer 3a is formed as a felt-like mat in which a large number of fibers are entangled, even if a tensile force acts on the surface layer material 3, the whole layer does not concentrate on a specific fiber. Become. Further, since the resin impregnated in the intermediate layer 3a has elasticity, it can follow even if the mat is extended.

  Further, when the surface layers 3b and 3c are respectively woven fabrics, the cured impregnated layer 1 is broken, and when a tensile force is applied to the surface layer material 3, the surface layer material 3 and the impregnated layer 1 are interposed. Peeling occurs and the surface layer material 3 extends, so that there is no breakage penetrating in the thickness direction.

  After repairing the target pipe B with the lining material A configured as described above, for example, the action of the surface layer material 3 of the cured lining material A during an earthquake will be described with reference to FIG.

  As a result of the force in the direction of the arrow acting on the pipe B with the occurrence of the earthquake, as shown in the figure, the gap between the joints 7 of the pipes 6 and 6 constituting the pipe B is expanded, and the lining material A is pulled. Force acts. As a result, cracks may occur in the cured impregnated layer 1 of the lining material A, and a fracture portion 8 that is an aggregate of these may be formed. Although the rupture portion 8 is formed along the circumference of the lining material A, the entire cross section of the circumference does not break, and the compressive strength of the lining material A is not affected. As the rupture portion 8 is formed in the cured impregnated layer 1, the outer film 2 may be damaged.

  When the fractured portion 8 is formed in the cured impregnated layer 1 and the outer film 2 is broken, the fractured portion of the impregnated layer 1 in the surface layer material 3 because the surface layer material 3 has water permeability and stretchability. A portion corresponding to 8 peels off from the impregnated layer 1 and extends to form an elongated portion 3d. As a result, the fracture portion 8 is covered with the elongated portion 3 d of the surface layer material 3. Furthermore, since the surface layer material 3 is impermeable to water, even if groundwater that has entered between the pipe B and the lining material A penetrates to the fractured portion 8 of the impregnated layer 1, the surface layer material 3 reaches the inner surface of the lining material A. Can be prevented from entering. Accordingly, it is possible to ensure water stopping.

  Next, an example of a method for repairing a pipe line using the lining material A as described above will be described. First, as shown in FIG. 4A, a lining material A having flexibility in an uncured state is laid between two manholes C provided in a pipeline B to be repaired. That is, the wire 10 is passed from one manhole to the other manhole, the end portion of the wire 10 is bound to the closed lining material A, and the wire 10 is wound up, whereby the one manhole is wound up. The lining material A is laid in the manhole on the other side.

  After the lining material A is laid between the two manholes C, the light irradiation device 11 is inserted into the lining material A from one side (left side in the figure) as shown in FIG. The hose 12a connected to the compressor 12 is inserted from the side (right side in the figure). Then, compressed air set to a predetermined pressure (about 0.05 MPa) is supplied from the compressor 12 to expand the lining material A. Thereby, as for the lining material A which has flexibility, the outer film 2 adjoins to the inner wall face of the pipe line B. FIG. At this time, it is preferable that the outer film 2 of the lining material A is in close contact with the inner wall surface of the pipe B, but it is not always necessary to be in close contact, and there is no problem even if a slight gap is formed.

  After the lining material A is sufficiently expanded, the light irradiation device 11 is turned on, and the lining material A is moved in the arrow direction while irradiating the lining material A with light. The light irradiated from the light irradiation device 11 passes through the inner film 4 and the surface layer material 3 and reacts with the curable resin impregnated in the fiber base material of the impregnation layer 1. As a result, the photocurable resin impregnated in the fiber base material starts to be cured and generates heat with this reaction. When the fiber base material is also impregnated with a thermosetting resin, the fiber base material is cured in response to this heat. In this way, the curable resin 5 impregnated in the fiber base material constituting the impregnation layer 1 of the lining material A is cured.

  While the light irradiation device 11 is turned on, the compressed air from the compressor 12 continues to be supplied to the lining material A while moving inside the lining material A. And is discharged from the upstream side in the moving direction of the light irradiation device 11. By passing this compressed air, the heat generated with the curing of the photocurable resin is discharged to the outside of the lining material A, and it is possible to prevent an increase in the internal temperature of the lining material A. Therefore, the resin impregnated in the lining material A does not deteriorate due to an increase in temperature, and stable performance can be exhibited.

  As shown in FIG. 2C, after the lining material A laid between the two manholes C provided in the pipe B is cured, the ends of the lining material A protruding from the respective manholes C are cut. Then, the inner peripheral surface of the pipe B can be repaired by caulking at a contact portion between the inner peripheral surface of the pipe B exposed to the manhole C and the outer surface of the cured lining material A to stop water. Is possible.

  In particular, since the cured lining material A exhibits high strength, it is possible to reinforce the pipeline B when the strength of the pipeline B is reduced. If there is a shift in the seam, it is possible to prevent water leakage by repairing across the shifted portion.

  The lining material A according to the present invention is a pipe line represented by a pipe for sewerage, and is advantageous for repairing a pipe line whose inner peripheral surface has deteriorated or strength has decreased due to long-term use. It is.

A Lining material B Pipe C Manhole 1 Impregnation layer 2 Outer film 3 Surface layer material 3a Intermediate layer 3b 3c Surface layer 3d Elongation part 4 Inner film 6 Pipe 7 Seam 8 Breaking part 10 Wire 11 Light irradiation device 12 Compressor 12a Hose 20 Outer film 21 Surface layer film 21a, 21c Polyethylene film 21b Polyamide film 22 Intermediate layer film 23 Inner layer film

Claims (6)

A sleeve-shaped lining material that is disposed inside the pipe and covers the inner surface of the pipe,
An impregnation layer comprising a fiber base material having a predetermined thickness, and the fiber base material impregnated with a curable resin;
A surface layer material disposed on at least one surface of the impregnation layer;
When the surface layer material is disposed on one surface of the impregnated layer , the film disposed on the surface of the impregnated layer where the surface layer material is not disposed, and
The surface layer material is an intermediate layer in which a mat having a predetermined thickness is impregnated with a resin, and a surface layer composed of a woven fabric or a non-woven fabric disposed on both sides of the intermediate layer and one surface attached to the impregnated layer The lining material is characterized in that, when the resin impregnated in the mat is cured, the resin has water permeability and greater stretchability than the cured impregnated layer.   The lining material according to claim 1, wherein the curable resin impregnated in the fiber base material is a photocurable resin, a thermosetting resin, a photocurable resin, and a thermosetting resin.   The lining material according to claim 1 or 2, wherein the resin impregnated in the mat constituting the intermediate layer of the surface layer material has light transmittance.   When the curable resin impregnated in the fiber base material of the impregnated layer and the resin impregnated in the mat of the surface layer material are cured, the surface layer material has stretchability and peelability with respect to the impregnated layer. The lining material according to any one of claims 1 to 3.   The lining material according to any one of claims 1 to 4, wherein a film is further disposed on a surface layer opposite to the surface layer disposed on the impregnated layer side of the surface layer material. A repair method for repairing the inner surface of a pipeline using the lining material according to any one of claims 1 to 5,
The lining material according to any one of claims 1 to 5 is disposed inside a pipeline to be repaired, and the lining material is expanded to be close to the inner surface of the pipeline,
Thereafter, a light irradiation device is inserted into the expanded lining material and light is applied to the lining material from the light irradiation device, or a heating device is inserted and the pipe to be repaired while heating the lining material by the heating device. A method for repairing a pipe, wherein the inner surface of the pipe to be repaired is repaired by curing the curable resin by moving along the path and curing the impregnated layer.

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