JP2011143684A - Lining material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lining material having favorable construction workability and repair workability which enables a worker to visually confirm an extent to be removed when necessity arises to remove the inner peripheral surface of a constructed lining material while preventing the fluctuation and excess or the deficiency of a thickness to be removed. <P>SOLUTION: The lining material 1 as an embodiment includes a covering layer 2 comprising an impermeable material and a base material layer 3 comprising a reinforcing fibrous base material which comprises a reinforcing fibrous material disposed inside the covering layer 2 and a resin adsorbing base material impregnated with a matrix resin. Among these, the covering layer 2 is formed of a film material with a discriminative color having discrimination ability from the base material layer 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lining material for rehabilitating a pipeline that has been aged by being constructed on the inner wall of an existing pipe.

  When existing pipes such as sewer pipes, water pipes, and agricultural water pipes buried in the ground are aged, the lining material is applied to the inner wall of the pipe without being excavated. The method of applying and repairing is widely used.

  As one of the rehabilitation methods for repairing existing pipes, fluid pressure is applied inside the tubular lining material to reversely insert the lining material into the existing pipe, and the inverted lining material is brought into close contact with the inner wall of the existing pipe and cured. There is a method of forming a lining layer. Also, a method of inserting a tubular lining material into an existing pipe with a reduced diameter, and expanding the diameter of the lining material by reversing and inserting a pressure hose inside the lining material, and integrating it with the inner wall of the existing pipe There is also.

  As this type of lining material, for example, Patent Document 1 discloses a pipe lining material having a structure in which an uncured liquid curable resin is impregnated into a resin adsorbing base material whose outer surface is airtightly covered with a plastic film. The use is described. The pipe lining material cures the impregnating resin while being pressed against the inner wall of the pipe, and becomes a lining layer that covers the inner wall of the pipe.

  Moreover, in the construction method described in Patent Document 1, the pipe lining material is folded into a flat shape before construction and deployed in a state of being stacked in a closed container. Then, a pipe lining material is attached to the opening end of the reversing nozzle connected to the sealed container, and water pressure is applied to the sealed container to insert the pipe lining material into the existing pipe while inverting it. The pipe lining material is expanded in diameter by the acting hydraulic pressure, and the resin adsorbing base material is brought into close contact with the inner wall of the existing pipe to form an inner surface covered with a plastic film. By having such a plastic film layer, the lining material has excellent inner surface smoothness, and the resin adsorbing substrate is protected.

JP 2003-165158 A

  As described above, the lining material applied to the existing pipe forms a lining layer covering the inner wall of the existing pipe.However, with continued use thereafter, foreign objects such as stones hit the lining layer or driftwood is caught. In some cases, it may be necessary to partially repair the damaged part. In such a case, the damaged portion can be sufficiently repaired by adhering a partial repair material made of the same material as the lining material to the location where the partial repair is required. However, since the lining material has a structure in which the inner peripheral surface is covered with a plastic film as described above, there is a problem that the partial repair material is difficult to adhere to the inner peripheral surface. Therefore, it was necessary to remove the plastic film layer on the inner peripheral surface by scraping and to improve the adhesion to the partial repair material.

  In addition, among existing pipes to be rehabilitated, there are pipe lines to which a plurality of pipes are connected and pipe lines having branch portions. In such a case, an operation of adhering and integrating the lining materials of adjacent pipelines at the intersection of the pipelines is performed. Even when such lining materials are bonded to each other, the plastic film layer on the inner surface may be removed as necessary in order to improve the adhesion.

  However, in the conventional lining material, the plastic film layer to be removed and the resin adsorbing base material inside thereof are almost the same color, and the interface between the plastic film layer and the resin adsorbing base material can be clearly grasped. could not. For this reason, even if the plastic film layer is removed, the inner surface of the lining material is removed too much, not only the plastic film layer but also the resin adsorbing substrate. It was easy to cause inconvenience that the plastic film layer remained.

  FIG. 12 is an explanatory view schematically showing an existing pipe renovated with a conventional lining material. In FIG. 12, reference numeral 101 denotes a conventional lining material, and the plastic film layer 102 and the resin adsorbing base material 103 are not shown by hatching for easy understanding of the drawing. As shown in the drawing, the plastic film layer 102 on the inner surface is scraped off in the partial repair range R of the existing pipe 104. However, since the plastic film layer 102 is difficult to distinguish from the resin adsorbing substrate 103 in appearance, the plastic film layer 102 may be removed excessively as illustrated. Thus, if the removal amount of the plastic film layer 102 increases, it will scrape off to the resin adsorption base material 103, and the thickness of the resin adsorption base material 103 will become thin. If it does so, the lining layer of the existing pipe | tube 104 will become thin, and thickness cannot fully be ensured, but it will be anxious about the strength reduction of the renovated existing pipe | tube 104.

  On the contrary, if the removal of the plastic film layer 102 is insufficient, the adhesiveness between the lining material 101 and the partial repair material is deteriorated, and it is difficult to appropriately repair the damaged portion.

  Therefore, the present invention has been made in view of the above-described problems, and even if it is necessary to remove the inner peripheral surface of the applied lining material, the operator can visually confirm the range to be removed. Thus, it is possible to provide a lining material having good workability and repair workability by preventing variations and excesses and deficiencies in the thickness to be removed.

  The solving means of the present invention for achieving the above object is a lining which is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of an existing pipe, and is inserted and expanded in the existing pipe to line the inner peripheral surface of the existing pipe. The material is assumed. The lining material has a multi-layer structure in which a base layer composed of a single layer or a multi-layer impregnated with a base resin mainly composed of a liquid synthetic resin and a coating layer inside the base layer are provided. . And it is set as the structure which provided the identification color with the other layer to one layer of a coating layer and a base material layer.

  With the above configuration, in the lining material, when removing the coating layer, the base material layer and the coating layer covering the inner surface can be identified, so the range to be removed can be visually confirmed, and the coating layer It is possible to proceed with the work while grasping the degree of removal. As a result, there is no excess or deficiency or variation in the amount of removal of the coating layer, and the workability and repair workability are excellent.

  In the lining material, the layer imparting the identification color can be provided in the following various forms.

  First, a 1st form is a structure which provides an identification color to the whole coating layer of a lining material.

  With this configuration, when removing the coating layer of the lining material, only the identification color portion needs to be removed, and the coating layer can be easily removed.

  In the second mode, a resin adsorbing base layer made of a resin adsorbing base impregnated with a base material resin is provided on the base layer of the lining material, and an identification color is imparted to the resin adsorbing base layer. In this case, an identification color may be imparted to the resin adsorbing substrate or an identification color may be imparted to the base material resin impregnated in the resin adsorbing substrate layer.

  With this configuration, when the coating layer of the lining material is removed, the inner surface of the lining material may be removed until the identification color of the resin adsorbing base material layer is visible.

  In the third embodiment, a resin adsorbing base material layer made of a resin adsorbing base material impregnated with a base material resin and an inner layer in contact with the coating layer are provided on the base material layer of the lining material, and an identification color is provided on the inner layer. It is the structure which gives. In this case, an identification color may be given to the entire inner layer, or a pattern of the identification color may be formed on the inner layer.

  With this configuration, when the coating layer of the lining material is removed, the inner peripheral surface of the lining material may be removed until the identification color of the inner layer is visible.

  In the fourth embodiment, a resin adsorbing base material layer made of a resin adsorbing base material impregnated with a base material resin and a reinforcing fiber base material layer made of a reinforcing fiber material are provided on the base material layer of the lining material. In this configuration, an identification color is imparted to the base material layer. In this case, the identification color may be imparted to the reinforcing fiber material, or the identification color fiber material may be arranged or mixed in the reinforcing fiber base layer.

  According to this configuration, the lining material can visually recognize the identification color imparted to the reinforcing fiber base layer through the resin adsorption base layer of the base layer. Therefore, when removing the coating layer of the lining material, the inner peripheral surface of the lining material may be removed until the identification color of the reinforcing fiber base layer is visible.

  According to the lining material of the present invention, even if it is necessary to remove the coating layer on the inner peripheral surface of the lining material after construction, the operator can visually grasp the portion to be removed. It can be accurately removed. Thereby, it can be set as the lining material excellent in construction property and repair workability | operativity.

It is sectional drawing which shows an example of the lining material which concerns on this invention. It is explanatory drawing which shows 1 process of the rehabilitation method of the existing pipe using the lining material of FIG. It is sectional drawing which shows the other example of the lining material which concerns on this invention. It is explanatory drawing which shows 1 process of the rehabilitation method of the existing pipe using the lining material of FIG. It is sectional drawing shown in the state which constructed the lining material which concerns on Embodiment 1 of this invention to the existing pipe. It is sectional drawing shown in the state which constructed the lining material which concerns on Embodiment 2 of this invention to the existing pipe. It is explanatory drawing which shows the cross section of the pipe axis direction of the existing pipe renovated with the lining material illustrated in FIG. 6, and shows the process of removing a coating layer typically. It is explanatory drawing which shows the place from which the coating layer of the existing pipe | tube shown in FIG. 7 was removed. It is sectional drawing shown in the state which constructed the lining material which concerns on Embodiment 3 of this invention to the existing pipe. It is sectional drawing shown in the state which constructed the lining material which concerns on Embodiment 4 of this invention to the existing pipe. It is sectional drawing shown in the state which constructed in the existing pipe the other example of the lining material which concerns on Embodiment 4 of this invention. It is explanatory drawing which shows typically the process example in the case of repairing the existing pipe renovated with the conventional lining material partially.

  Embodiments of a lining material according to the present invention will be described with reference to the drawings. In the following, prior to the description of the lining material according to the embodiment of the present invention, first, the schematic configuration of the lining material and the existing pipe rehabilitation method performed using the lining material will be described.

  FIG. 1 is a cross-sectional view showing an example of a lining material, and FIG. 2 is an explanatory view showing a step of a rehabilitation method for an existing pipe using the lining material of FIG.

(Lining material)
The lining material 1 forms a lining layer on the inner peripheral surface of the existing pipe 2 to be repaired, and is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the existing pipe 2 in advance. The lining material 1 has a multilayer structure including a coating layer 2 and a base material layer 3.

  In the illustrated form, the coating layer 2 is provided on the outermost side of the lining material 1. The covering layer 2 is formed in a cylindrical shape from a synthetic resin film material that is impermeable to pressurized fluid. Specifically, the coating layer 2 is formed of a polyethylene film, a polyurethane film, a soft vinyl chloride resin film, or the like. Among these, a polyethylene film material having a thickness of about 0.2 to 2.0 mm is suitable for the coating layer 2. In addition, the coating layer 2 can be formed using a resin film material such as polypropylene, nylon, polyester, or polyvinyl chloride, or a sheet material made of an elastomer or a synthetic rubber material.

  Inside the coating layer 2 of the lining material 1, the base material layer 3 is provided over a single layer or multiple layers. In FIG. 1, as the base material layer 3, resin adsorption base material layers 31 and 31 and a reinforcing fiber base material layer 32 are provided. The resin adsorption base material layer 31 is a base material impregnated with a base resin mainly composed of an uncured liquid synthetic resin, and is preferably made of a material having flexibility and excellent resin impregnation properties. It is formed of a resin nonwoven fabric or chopped strand mat.

  When forming the resin adsorption base material layer 31 with a resin nonwoven fabric, it is preferable to use a polyester nonwoven fabric. Moreover, as the resin nonwoven fabric of the resin adsorbing base material layer 31, a high-density polyethylene (HPPE) or a nonwoven fabric made of a high-strength and high-elastic material such as polypropylene can be used. Further, the resin nonwoven fabric of the resin adsorbing substrate layer 31 may be felt, mat, spunbond, web, or the like formed from continuous filaments or staple fibers.

  Moreover, when forming the resin adsorption base material layer 31 with a chopped strand mat, for example, after strands such as glass fibers are cut into a predetermined length and dispersed in a mat shape, an adhesive such as a thermoplastic resin is used. It is preferable to use a material that is uniformly melted and thermally melted to bond the strands to form a mat. In this case, the resin adsorbing base material layer 31 can obtain higher strength than the case where a resin nonwoven fabric is used.

  The resin adsorbing base material layer 31 is impregnated with an uncured base material resin in the rehabilitation process of the existing pipe 4 and hardens to form a lining layer. As the base material resin, a thermosetting resin is a main ingredient, and among them, an epoxy resin having a relatively low viscosity, excellent physical properties after curing, and low cost is preferable. Moreover, you may use thermosetting resins, such as a vinyl ester resin and a melamine resin, as a main ingredient of base material resin. Furthermore, a curing agent is added to the base resin in the base material resin, and the curing reactivity is enhanced.

  The reinforcing fiber base layer 32 in the base layer 3 is interposed, for example, inside the resin adsorbing base layer 31 to increase the strength of the lining layer. The fiber of the reinforcing fiber base layer 32 is not particularly limited as long as it is a reinforcing fiber, but glass fiber, aramid fiber, carbon fiber and the like are preferable. Of these, glass fibers are preferred in view of the strength and price of the resulting fiber-reinforced resin molded product. In addition, the reinforcing fibers used for the reinforcing fiber base layer 32 are preferably pretreated with a silane coupling agent in order to enhance the adhesion with the base material resin.

  The reinforcing fiber base layer 32 is preferably formed by arranging a plurality of sheet-like reinforcing fiber bases in a cylindrical shape. In this case, the sheet-like reinforcing fiber bases are arranged so as to overlap each other in the circumferential direction of the lining material 1. Thereby, when the diameter of the lining material 1 is expanded in the construction process of the lining material 1, the sheet-like reinforcing fiber bases are displaced from each other in the circumferential direction, and the reinforcing fiber base layer 32 follows the diameter expansion of the lining material 1. be able to.

  In the lining material 1 of FIG. 1, the base material layer 3 has a configuration in which the reinforcing fiber base material layer 32 is provided between the resin adsorbing base material layers 31 and 31 formed in a cylindrical shape. The layer 3 can have various other forms, and will be described in the following embodiments.

(Rehabilitation method for existing pipes)
Next, the rehabilitation method of the existing pipe 4 using the multi-layered lining material 1 configured as described above will be described.

  Prior to the rehabilitation work of the existing pipe 4, if there is a fluid such as sewage in the existing pipe 4, it is once removed from the existing pipe 4. As shown in FIG. 2, manholes M <b> 1 and M <b> 2 are provided at appropriate intervals in the pipe line of the existing pipe 4, and a damming member 5 is provided on the upstream side of the upstream manhole M <b> 1. It is preferable that the fluid such as sewage that has been dammed is further diverted from the upstream manhole (not shown) and discharged to the downstream pipe line of the manhole M2. Furthermore, it is preferable to start the rehabilitation work with the lining material 1 after removing foreign matter such as deposits and wood chips existing in the existing pipe 4 and performing high-pressure water washing. Since the lining material 1 is a flexible cylindrical body, when the existing pipe 4 is rehabilitated, it can be carried into the construction site in a compact state folded in a flat shape.

  In the lining material 1, an uncured base material resin is injected into the coating layer 2. Next, the inside of the coating layer 2 is depressurized to degas the air in the resin adsorbing base layer 31, and the base resin is impregnated into the resin adsorbing base layer 31 and the reinforcing fiber base layer 32. The gap between the fibers of the resin adsorbing base material layer 31 and the reinforcing fiber base material layer 32 acts as a degassing path and also acts as a flow path for the uncured base resin.

  Next, as shown in FIG. 2, the lining material 1 is attached to the reverse insertion machine 6 installed on the ground, and fluid pressure such as compressed air or heated water is applied from the outer peripheral side (the coating layer 2 side) of the lining material 1, It is inserted into the existing pipe 4 while being inverted through the manhole M2 (inversion method). Thus, the lining material 1 is sequentially inserted into the existing pipe 4 while turning over so that the coating layer 2 is inside. Further, the inverted lining material 1 is expanded in diameter by the action of fluid pressure in the existing pipe 4, and the resin adsorption base material layer 31 is in close contact with the inner wall of the existing pipe 4.

  The lining material 1 is integrated with the existing pipe 4 by curing the base material resin impregnated in the base material layer 3 to form a lining layer. The lining layer is covered with the covering layer 2 and forms a smooth inner peripheral surface in the existing pipe 4.

  As shown in FIG. 1, the lining material 1 for rehabilitating the existing pipe 4 is not limited to a laminate having a coating layer 2 on the outer peripheral side and a base material layer 3 on the inner peripheral side. For example, as shown in FIG. 3, the lining material 1 includes a coating layer 2 on the inner peripheral side, and includes resin adsorbing base material layers 31 and 31 and a reinforcing fiber base layer 32 on the outer peripheral side of the coating layer 2. It may be formed. That is, in this case, the lining material 1 has a laminated form in which the inner peripheral side and the outer peripheral side are reverse to those in FIG. The lining material 1 is inserted into the existing pipe 4 without being inverted and then expanded in diameter to form a lining layer on the inner wall of the existing pipe 4 (forming method).

  Specifically, as shown in FIG. 3, the lining material 1 is formed in a tubular body having a diameter slightly smaller than the inner diameter of the existing pipe 4. When rehabilitating the existing pipe 4, as shown in FIG. 4, plugs 71 are attached to both ends of the lining material 1 and are drawn into the existing pipe 4 using the manholes M <b> 1 and M <b> 2. The pressurized fluid introduced from the boiler unit 7 on the ground acts inside the lining material 1 and expands in the existing pipe 4. In the lining material 1, the expanded base material layer 3 is pressed against the inner wall of the existing pipe 4 to be in close contact therewith.

  Next, the lining material 1 is integrated with the existing pipe 4 to form a lining layer when the base material resin impregnated in the base material layer 3 is cured. The lining layer is covered with the covering layer 2 and forms a smooth inner peripheral surface in the existing pipe 4.

  Each of the lining materials 1 shown in FIGS. 1 and 3 expands in the existing pipe 4 and is in close contact with the inner wall. And the lining material 1 was covered with the coating layer 2 on the inner peripheral surface of the lining layer (that is, the inner surface of the renovated existing pipe 4), regardless of whether the lining material 1 was constructed by the reversal method or the forming method. It becomes a state, and becomes a protective layer having excellent surface smoothness and high water resistance and chemical resistance.

  In such a lining layer, the coating layer 2 disposed on the innermost peripheral side is appropriately removed when it becomes necessary to repair the lining layer or to join the lining layers later. By removing the covering layer 2, the lining layer can enhance the adhesion with the partial repair material and the lining layer to be joined.

  Therefore, in the lining material 1 according to the present invention, an identification color with respect to another layer is given to one of the coating layer 2 and the base material layer 3 in preparation for the necessity to remove the coating layer 2. is there. Thereby, the operator who removes the coating layer 2 can grasp the degree of removal of the coating layer 2 while performing the removal operation. The layer imparting the identification color can be provided in various forms in the lining material 1. Hereinafter, four of them will be described.

<Embodiment 1>
FIG. 5 is a cross-sectional view showing the lining material 1 according to the first embodiment and showing a state in which the lining material 1 is applied to the existing pipe 4. In addition, in each figure referred in FIG. 5 and Embodiment 2 or later, in order to make the structure of the lining material 1 easy to see, each layer of the lining material 1 is shown by omitting hatching indicating a cross section and giving an identification color. Shown with light ink on the layer.

  The lining material 1 includes a coating layer 2 and a base material layer 3. The base material layer 3 includes a resin adsorption base material layer 31. In this lining material 1, the entire coating layer 2 is colored in an identification color. The covering layer 2 is made of a synthetic resin material such as a polyethylene film, a polyurethane film, or a soft vinyl chloride resin film having a thickness of about 0.2 to 2.0 mm, for example, and is colored in an identification color.

  In the lining material 1 having a multilayer structure, the identification color is a color that is given so that the layer has the distinguishability from other layers, and is a color that can be easily distinguished from the other layers by an operator. Further, the color may be a color that can be identified by contrast of saturation and lightness, in addition to enhancing the distinguishability by making the hue different from that of the other layers.

  As shown in FIG. 5, in a state where the lining material 1 is applied to the existing pipe 4, the base material layer 3 is in a state where the base material resin impregnated in the resin adsorbing base material layer 31 is cured. In many cases, it is a colored transparent body or translucent body in which the color of the base resin appears as it is.

  Therefore, a color having a distinguishability with respect to the color of the base material layer 3, that is, the base material resin, is selected as the identification color of the covering layer 2. And the coating layer 2 is colored by mixing the pigment and fluorescent substance of this discriminating color with the synthetic resin of a material, or apply | coating to a film material.

  As a result, the lining material 1 can be clearly distinguished between the coating layer 2 and the base material layer 3, and when the partial repair is required or when the bonding property between the intersecting lining layers is improved, the coating layer It becomes possible to remove only 2 reliably and to improve adhesiveness.

  Usually, an appropriate cutting tool or a cutting machine is used to remove the coating layer 2. In particular, conventionally, when the coating layer 2 is removed by cutting manually, it has been necessary to grasp the removal amount by relying on a sense such as visual observation or touch. On the other hand, according to the lining material 1 according to the first embodiment, since the coating layer 2 on the inner peripheral surface of the lining layer is colored in an identification color, it is only necessary to cut only this colored portion. When the removal of the coating layer 2 is completed, the portion colored in the identification color disappears from the surface of the lining layer. Accordingly, it is possible to work while grasping the degree of removal of the coating layer 2 as needed based on the surface identification color, and it becomes easy to remove only the coating layer 2. In addition, the coating layer 2 can be removed uniformly, and the work can be performed efficiently without causing excess or deficiency or variation in the removal amount.

<Embodiment 2>
Next, the lining material 1 which concerns on Embodiment 2 of this invention is demonstrated. FIG. 6 is a cross-sectional view showing the lining material 1 according to the second embodiment and showing a state in which the lining material 1 is applied to the existing pipe 4.

  The lining material 1 includes a coating layer 2 and a base material layer 3, and the base material layer 3 includes an inner layer 33 in contact with the coating layer 2 and a resin adsorbing base material layer 31 impregnated with a base material resin. It has become.

  In Embodiment 1 described above, an identification color is given to the entire coating layer 2. In this embodiment, the lining material 1 is provided with an identification color on the inner layer 33 of the base material layer 3.

  The inner layer 33 is made of a synthetic resin sheet material or film material, and is interposed between the coating layer 2 and the resin adsorption base material layer 31. The inner layer 33 is formed of an identification color sheet material or film material so that the inner layer 33 can be clearly distinguished from the coating layer 2. As the identification color of the inner layer 33, a color having identification with respect to the color of the coating layer 2 is selected.

  When the existing pipe 4 is rehabilitated by the lining material 1, the base material layer 3 of the lining material 1 and the existing pipe 4 are integrated, and a lining layer whose inner surface is covered with the coating layer 2 of the lining material 1 is formed. . The interface between the coating layer 2 and the resin-adsorbing substrate layer 31 is clearly identified by the inner layer 33, and the coating layer 2 can be recognized. The covering layer 2 is removed within a necessary range when such operations as repairing the lining layer or joining the lining layers are performed.

  7 and 8 are explanatory views schematically showing the process of removing the coating layer 2 by a cross section in the pipe axis direction of the existing pipe 4.

  For example, in the existing pipe 4 shown in FIG. 7, it is assumed that partial repair of the inner peripheral surface of the lining layer 10 is required in the repair range R. In this case, the coating layer 2 in the repair range R is removed by the operation of the cutting machine 8, the resin adsorbing base material layer 31 is exposed, the partial repair material is adhered, and the lining layer 10 is repaired. Here, the inner layer 33 to which the identification color is given indicates the interface between the coating layer 2 and the resin adsorption base material layer 31. In the present embodiment, the inner layer 33 is made of a synthetic resin sheet material or film material, and thus is removed together with the coating layer 2.

  That is, the removal of the coating layer 2 in the repair range R can be performed in the manner of removing the inner layer 33 of the identification color from the lining layer 10. The operator may scrape the inner layer 33 while removing the covering layer 2, and perform the removing operation from the inner peripheral surface of the lining layer 10 in the repair range R until there is no part of the identification color.

  As a result, as shown in FIG. 8, the covering layer 2 and the inner layer 33 of the lining layer 10 are appropriately removed in the repair range R in the existing pipe 4. Therefore, the resin adsorption base material layer 31 of the base material layer 3 is suitably exposed without reducing its thickness, and the adhesiveness with the partial repair material can be enhanced. In this way, the removal of the coating layer 2 can proceed with the identification color of the inner layer 33 as a guide, so that the amount of the coating layer 2 to be removed becomes insufficient, as in the conventional example of FIG. Inconveniences such as excessive removal are prevented.

  In the lining material 1, the inner layer 33 is not limited to being formed of a synthetic resin sheet material or film material, and may be formed of a resin adsorption base material. In this case, for example, the inner layer 33 of the identification color is obtained by interposing the resin adsorption base material having the identification color between the coating layer 2 and the resin adsorption base material layer 31. The inner layer 33 may be disposed between the coating layer 2 and the resin adsorption base material layer 31, and an identification color resin adsorption base material is spirally disposed on the outer peripheral side of the coating layer 2. Thus, a form having a spiral pattern of the identification color may be employed.

  Furthermore, the inner layer 33 may be formed using a fiber material of an identification color. In this case, for example, the inner layer 33 including the identification color is formed by forming a fiber material of the identification color in a net shape and interposing between the coating layer 2 and the resin adsorption base material layer 31. Further, the identification color of the fiber material is not limited to one color, and the inner layer 33 may be formed by combining fiber materials having a plurality of colors having identification properties.

  Thereby, when removing the covering layer 2, it is sufficient to cut the covering layer 2 until the identification color of the inner layer 33 can be visually recognized. By completing the removal operation with reference to the fact that the identification color of the inner layer 33 is visible. Only the coating layer 2 can be easily removed. Alternatively, the coating layer 2 may be removed by cutting until the identification color of the inner layer 33 disappears from the surface.

  As described above, even in the lining material 1 in such a form, only the coating layer 2 can be removed reliably and uniformly, and the work can be efficiently performed without causing excess or deficiency or variation in the removal amount. It becomes.

<Embodiment 3>
Next, the lining material 1 which concerns on Embodiment 3 of this invention is demonstrated. FIG. 9 is a cross-sectional view showing the lining material 1 according to the third embodiment and showing a state in which the lining material 1 is applied to the existing pipe 4.

  The lining material 1 includes a coating layer 2 and a resin adsorption base material layer 31 as a base material layer 3. In Embodiment 2 mentioned above, it was the structure by which the identification color was provided to the inner side layer 33 of the base material layers 3. FIG. In the present embodiment, the lining material 1 is provided with an identification color on the resin adsorbing base material layer 31 in the base material layer 3.

  The resin adsorbing substrate such as the resin nonwoven fabric and the chopped strand mat constituting the resin adsorbing substrate layer 31 is originally colorless or a color close to white. There are a plurality of methods for imparting an identification color to the resin adsorbing substrate layer 31, and one of them is to color the resin adsorbing substrate itself to an identification color different from that of the coating layer 2. In other words, the resin adsorbing substrate is colored using a dye having an identification color different from that of the coating layer 2, or a fiber material colored with an identification color pigment is mixed with the resin adsorbing substrate, whereby an identification color is obtained. The resin adsorption base material layer 31 is obtained.

  As another method for imparting an identification color to the resin adsorbing substrate layer 31, there is also a method in which a base material resin impregnated in the resin adsorbing substrate layer 31 is used as an identification color. In this case, it is possible to color the base material resin in the identification color by mixing the base material resin with an identification color pigment, a fluorescent substance, or the like.

  As a result, as shown in FIG. 9, when the lining material 1 is lined on the existing pipe 4, the coating layer 2 and the resin adsorbing base layer 31 are formed in different colors, and the resin adsorbing base layer 31 is identified. Increases nature. Therefore, when the coating layer 2 is removed, the coating layer 2 may be cut until the identification color of the resin adsorption base material layer 31 can be confirmed. As a result, only the coating layer 2 can be removed uniformly, and the amount of removal of the coating layer 2 is not excessively insufficient or uneven, and the operation can be efficiently performed.

<Embodiment 4>
Next, the lining material 1 which concerns on Embodiment 4 of this invention is demonstrated. FIGS. 10 and 11 are sectional views showing the lining material 1 according to the fourth embodiment and showing the state in which the lining material 1 is applied to the existing pipe 4.

  The lining material 1 includes a coating layer 2 and a base material layer 3. The base material layer 3 has a three-layer structure of resin adsorbing base material layers 31 and 31 and a reinforcing fiber base material layer 32. That is, the reinforcing fiber base layer 32 is provided between the resin adsorbing base layers 31 and 31 on the base layer 3 of the lining material 1.

  In Embodiment 3 mentioned above, it was the structure by which the identification color was provided to the resin adsorption base material layer 31 of the base material layer 3 of the lining material 1. FIG. In this embodiment, it is set as the structure by which the identification color was provided to the reinforced fiber base material layer 32 among the base material layers 3 of the lining material 1. FIG.

  As shown in FIG. 10, in the lining material 1, an identification color is given to the reinforcing fiber base layer 32 of the base layer 3. In this case, the whole reinforcing fiber base material layer 32 can be used as the identification color by using the reinforcing fiber colored in a color having identification. Moreover, you may utilize the color of the reinforced fiber itself used for the reinforced fiber base material layer 32 as an identification color. For example, the black reinforcing fiber base layer 32 can be formed by using carbon fibers as the reinforcing fibers, and the yellow reinforcing fiber base layer 32 can be formed by using aramid fibers.

  Further, as shown in FIG. 10, not only the entire reinforcing fiber base layer 32 has an identification color, but also an identification color fiber material is arranged or mixed in the reinforcing fiber, and the reinforcing fiber base layer 32 has an identification color. The fiber material may be dispersed. For example, in the example shown in FIG. 11, fiber materials 321... 321 of identification color are arranged in the reinforcing fiber base layer 32 evenly in the tube axis direction. This can be obtained, for example, by using glass fibers as the main base material and coloring colored fibers such as carbon fibers and aramid fibers in the tube axis direction and mixing them with the main base material. Alternatively, the reinforcing fiber base layer 32 may be formed by weaving a colored fiber bundle using glass fiber as the main base material.

  In addition, when assigning an identification color to the reinforcing fiber base layer 32 in this manner, the base material resin impregnated in the base layer 3 is preferably colorless or colored transparent or translucent. Further, when the base material layer 3 is impregnated with the translucent base material resin, the base material resin is selected so as to have a transparency that allows the reinforcing fiber base material layer 32 of the identification color to be visually recognized from the outside of the base material layer 3. It is preferable to do.

  Accordingly, as shown in FIGS. 10 and 11, when the lining material 1 is lined on the existing pipe 4, the whole or a part of the reinforcing fiber base layer 32 of the base material layer 3 is formed with the coating layer 2. Will be formed in different colors. When the coating layer 2 is removed and the resin-adsorbing substrate layer 31 is exposed, the reinforcing fiber substrate layer 32 is such that the identification color of the reinforcing fiber substrate layer 32 is visible through the resin-adsorbing substrate layer 31. It becomes.

  Therefore, when removing the coating layer 2, the coating layer 2 may be cut until the identification color of the reinforcing fiber base layer 32 is visible. As a result, only the coating layer 2 can be removed uniformly, and the amount of removal of the coating layer 2 is not excessively insufficient or uneven, and the operation can be efficiently performed.

  As described above, the lining material 1 as shown in the first to fourth embodiments is used to renovate the inner wall of the existing pipe 4, so that even if the lining layer needs to be partially repaired thereafter, the coating layer Only 2 can be removed by scraping, and the work of improving the adhesion with the partial repair material can be easily performed. By increasing the adhesion between the partial repair material and the lining layer, the reliability of the repaired portion can be increased.

  Further, when the lining material 1 is applied to the existing pipe 4, the lining material 1 is also suitable when the lining material 1 is a pipe line having a plurality of pipes connected or a branch line. That is, when the lining materials 1 of the adjacent pipe lines are bonded and integrated at the intersection of the existing pipes 4, it becomes easy to remove the covering layer 2 at the joining part without excess and deficiency, and the linings that are in contact with each other The adhesion between the ends of the material 1 can be enhanced. In addition, it is possible to remove the coating layer 2 of the lining material 1 evenly and without causing excess or deficiency regardless of the skill level of the operator, so that the base material layer 3 is prevented from being scraped off. Thus, the strength of the existing pipe 4 can be maintained.

  The lining material 1 according to the present invention is not limited to the multilayer structure as shown in the first to fourth embodiments. For example, the base material layer 3 includes the resin-adsorbing base material layer 31 and the reinforcing fiber base material layer. 32 may be a multilayer structure having four or more layers. Even in that case, it is easy to distinguish between the coating layer 2 and the other layers by including a color having distinguishability from other layers in any one of the coating layer 2 and the base material layer 3. Only the coating layer 2 can be efficiently removed.

  INDUSTRIAL APPLICATION This invention can be utilized suitably for the lining material used for the rehabilitation of the existing pipe which became old and needed repair.

DESCRIPTION OF SYMBOLS 1 Lining material 2 Coating layer 3 Base material layer 31 Resin adsorption base material layer 32 Reinforcement fiber base material layer 33 Inner layer 4 Existing pipe 5 Damping member 6 Reverse insertion machine 7 Boiler unit 71 Plug 8 Cutting machine M1, M2 Manhole

Claims (11)

It is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the existing pipe, is inserted and expanded in the existing pipe, and is a lining material having a multilayer structure for lining the inner peripheral surface of the existing pipe,
A base layer composed of a single layer or multiple layers impregnated with a base resin mainly composed of a liquid synthetic resin, and a coating layer inside the base layer, and in one of the coating layer and the base layer, A lining material provided with a color distinguishing from other layers. The lining material according to claim 1,
A lining material, wherein an identification color is given to the entire coating layer. The lining material according to claim 1,
The lining material, wherein the base material layer has a resin adsorbing base material layer made of a resin adsorbing base material impregnated with a base material resin, and an identification color is given to the resin adsorbing base material layer. In the lining material according to claim 3,
A lining material, wherein an identification color is imparted to the resin-adsorbing substrate. In the lining material according to claim 3,
A lining material, wherein an identification color is imparted to a base material resin impregnated in the resin adsorbing base material layer. The lining material according to claim 1,
The base layer includes a resin adsorbing base layer made of a resin adsorbing base impregnated with a base material resin, and an inner layer in contact with the coating layer, and an identification color is given to the inner layer. Lining material to be used. The lining material according to claim 6,
A lining material, wherein an identification color is imparted to the entire inner layer. The lining material according to claim 6,
A lining material, wherein the inner layer has an identification color pattern. The lining material according to claim 1,
The base material layer includes a resin adsorbing base material layer made of a resin adsorbing base material impregnated with a base material resin and a reinforcing fiber base material layer made of a reinforcing fiber material, and an identification color is given to the reinforcing fiber base material layer. Lining material characterized by being made. In the lining material according to claim 9,
A lining material, wherein an identification color is imparted to the reinforcing fiber material. In the lining material according to claim 9,
A lining material, wherein a fiber material of an identification color is arranged or mixed in the reinforcing fiber base layer.

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