JP2015157406A - Repair structure and repair method for conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair structure and a repair method for a conduit, improved in water cutoff performance, in a connection part between a fitting pipe and a main pipe.SOLUTION: A repair structure for a conduit includes in a connection part between a main pipe 102 and a fitting pipe 106, a main pipe renovation pipe 30 provided inside the main pipe 102, and a fitting pipe renovation pipe 42 provided inside the fitting pipe. In the repair structure, water expansion materials 40 and 44 for water cutoff, containing water expansion component and having a cavity in an unexpanded state are provided between the main pipe 102 and the main pipe renovation pipe 30, and between the fitting pipe 106 and the fitting pipe renovation pipe 42 in at least the connection part and its vicinity.

Description

  The present invention relates to a pipe repair structure and a repair method at a connection portion between a main pipe and a mounting pipe.

  Sewage pipes deteriorate with long-term use, and their useful life is generally about 50 years. Therefore, the number of sewer pipes exceeding the useful life is increasing year by year. Aged sewer pipes are deformed, cracked, etc., and not only the drainage function of the sewage is lowered, but also the groundwater and earth and sand around the sewer pipes flow into the sewer pipes, creating cavities in the ground. It also causes depression. In addition, since sewage pipes buried in the ground are easily affected by ground changes such as earthquakes, some repairs are required at a predetermined time.

  There are two types of repair methods for sewage pipes: full repair (span repair) for repairing the entire sewage pipes installed between manholes, and partial repairs for repairing cracks and breakage at specific locations. In general, overall repair is adopted when the entire sewer pipe is aged and there are many damaged parts, and the strength is reduced.Partial repair is partly cracked or broken, although the strength of the sewer pipe itself is at a certain level. It is adopted when water leakage occurs at the joint between structural unit tubes such as a fume tube or the like constituting the sewer pipe.

  The location where water leakage is likely to occur in the sewage pipeline is the connection between the main pipe and the mounting pipe. As a method for repairing a pipe line including this connecting portion, a method described in Patent Document 1 is known. In this method, a main pipe lining material is formed inside the main pipe using a main pipe lining material, and a mounting pipe lining material is formed inside the mounting pipe using a mounting pipe lining material. A connecting portion lining material having a T-shape in side view is installed at a connecting portion between the main pipe and the mounting pipe. Each lining material is a lining material that is cured by light or heat, and a rehabilitated tube is formed by curing with light or heat while being in close contact with the inner surface of the pipe to be repaired.

Japanese Patent Laid-Open No. 10-225990

  However, in the repair method of Patent Document 1, since the lining material is cured and contracted, there is a slight amount between the existing pipe and the cured lining material (rehabilitated pipe) after the repair work or between the cured lining materials. There may be gaps. In such a case, groundwater or earth and sand outside the pipeline may flow into the pipeline through the gap, and this may cause a cavity in the ground.

  Furthermore, the repair method described in Patent Document 1 requires the work of individually introducing three lining materials, a main pipe lining material, a mounting pipe lining material, and a connecting portion lining material, and curing them with light and heat, respectively. Therefore, there was a problem that work efficiency was low.

  The objective of this invention is providing the repair structure of the pipe line in the connection part of the attachment pipe and main pipe which are excellent in water-stopping. Moreover, the objective of this invention is providing the repair method which can form efficiently the repair structure which is excellent in water stop.

In order to solve the above problem, the pipe repair structure according to claim 1,
In the connecting portion between the main pipe and the mounting pipe, in the repair structure of the pipe line having the main pipe rehabilitation pipe provided inside the main pipe and the mounting pipe rehabilitation pipe provided inside the mounting pipe,
At least in the connection portion and the vicinity thereof, a gap is formed between the main pipe and the main pipe rehabilitation pipe and between the attachment pipe and the attachment pipe rehabilitation pipe and includes a water expansion component and is in an unexpanded state. The water expansion material for water stop which has is provided.

  According to this configuration, when the groundwater that is about to flow into the pipe line from the gap between the connection portion of the main pipe and the attachment pipe reaches the water stoppage expansion material provided in the connection portion, the water stoppage expansion material is converted into the groundwater. Absorbs and expands. And since this expansion | swelling eliminates the space | gap of the water expansion material for a water stop, and the route | route through which water passes is interrupted | blocked, it can prevent that groundwater and earth and sand flow further. In addition, since the water expansion material for water stop has a gap, the groundwater penetrates through the gap to the inside of the water expansion material for water stop, so that it is possible to obtain a repair structure having a high water absorption effect and a high expansion rate and excellent water stoppage. it can.

The repair structure according to claim 2 is:
A cylindrical portion that covers the inner peripheral surface of the mounting pipe in the vicinity of the main pipe, and extends outward from one end of the cylindrical section and covers the inner peripheral surface of the main pipe in the vicinity of the mounting pipe A water-impermeable connecting portion covering body having a flange-like portion is further provided on the outside of the water expansion material for water stop.

  Even if there is a large amount of inflowing groundwater and it is not possible to prevent the inflow only with the water expansion material for water stop, the connection part provided on the outside (main pipe / mounting pipe side) of the water expansion material for water stop Due to the presence of the covering, it is possible to more effectively prevent groundwater and earth and sand from flowing into the rehabilitation pipe.

The repair structure according to claim 3 is:
The water expansion material for water stop is a fiber material containing water expansion fibers or water expansion particles as the water expansion component. Since the fiber material such as the nonwoven fabric has a structure in which the fibers are entangled with each other, the passage route of the water is blocked also by the earth and sand accompanying the inflow of the groundwater being captured by the fiber material, and the water stopping function is further improved.

  The repair structure according to claim 4 is characterized in that the water expansion material for water stop is provided in a compressed state. According to this configuration, since the water expansion material for water stop is provided in a state where the gap of the water expansion material for water stop is further reduced, the water passage route blocking function due to the expansion of the water expansion component can be obtained more effectively. .

The repair structure according to claim 5 is:
The connection part covering body is made of rubber. By using rubber, the adhesion between the connecting portion covering body and the inner surface of the main pipe or the mounting pipe becomes better, and the water stop effect at the connecting portion is further improved.

The pipe repair method according to claim 6 is a repair method for obtaining the repair structure according to claim 1,
A main pipe lining material in which a main lining material including a water expansion component and having a void in a non-expanded state is provided on the outer peripheral surface is introduced into the main pipe and cured to form a main pipe rehabilitation pipe. Tube forming process;
Rehabilitation for mounting pipes that introduces a lining material for a mounting pipe, which includes a water expansion component and has a void in a non-expanded state and provided on the outer peripheral surface, into the mounting pipe and cures to form a rehabilitation pipe for the mounting pipe Tube forming process;
It is characterized by including.

  According to this configuration, the lining material curing work that takes time and labor in the repair work is only required twice, and no further curing work is required, so that the repair work can be simplified. That is, in the past, three hardening operations were required: a hardening operation for the lining material for the mounting pipe, a hardening operation for the lining material for the main pipe, and a hardening operation for the connection lining material. Since only the pipe lining material needs to be hardened, the repair work can be made more efficient.

The repair method according to claim 7 is a repair method for forming the repair structure according to claim 2,
Before the main pipe rehabilitation pipe forming step and the attachment pipe rehabilitation pipe forming step,
A cylindrical portion that covers the inner surface of the mounting pipe in the vicinity of the main pipe, and a hook-shaped section that extends outward from one end of the cylindrical section and covers the inner surface of the main pipe in the vicinity of the mounting pipe And a connection part covering body installation step of installing a water-impermeable connection part covering body on the connection part.

  According to this configuration, although one step is added as compared with the method of claim 6, this step does not require a hardening operation, so that the efficiency of the repair operation is improved as compared with the conventional method, and the connection portion covering is performed. The effect of further improving the water stoppage by the body is exhibited.

The repair method according to claim 8 is a repair method for forming the repair structure according to claim 1,
A cylindrical portion that covers the inner surface of the mounting pipe in the vicinity of the main pipe; and a hook-shaped portion that extends outward from one end of the cylindrical section and covers the inner surface of the main pipe in the vicinity of the mounting pipe; An installation step of installing a water expansion material for still water containing a water expansion component and having a void in a non-expanded state at the connection portion;
Main pipe lining material is introduced into the main pipe and cured to form a main pipe rehabilitation pipe forming step;
A lining material for a mounting pipe is introduced into the mounting pipe and cured to form a rehabilitation pipe for a mounting pipe that is cured to form a retreading pipe for a mounting pipe;
It is characterized by including.

  According to this configuration, although one step is added as compared with the method of claim 6, this step does not require a hardening operation, and an operation of providing a water expansion material for water stop on the outer peripheral surface of the lining material in advance. Since it is not necessary to carry out, a repair structure with a high water-stopping property can be obtained by an efficient repair work.

The repair method according to claim 9 is a repair method for forming the repair structure according to claim 2,
An installation step of installing, on the connection portion, a connection portion covering body with a water expansion material for water stop, in which an inner surface of the connection portion covering body includes a water expansion component containing a water expansion component and having a void in a non-expanded state. When,
Main pipe lining material is introduced into the main pipe and cured to form a main pipe rehabilitation pipe forming step;
A lining material for a mounting pipe is introduced into the mounting pipe and cured to form a rehabilitation pipe for a mounting pipe that is cured to form a retreading pipe for a mounting pipe;
It is characterized by including.

  According to this configuration, although one step is added as compared with the method of claim 6, this step does not require a hardening operation, and an operation of providing a water expansion material for water stop on the outer peripheral surface of the lining material in advance. Since it is not necessary to carry out, a repair structure with a high water-stopping property can be obtained by an efficient repair work.

  According to the present invention, at the connecting portion between the main pipe and the attachment pipe, a repair structure having excellent water stoppage is obtained by interposing a water-stopping water expansion material between the main pipe and the attachment pipe and these rehabilitation pipes. Can do. Therefore, it is possible to ensure the effect of preventing the deterioration of the flow-down function due to the aging of the pipeline and the effect of preventing the formation of cavities in the ground for a long period of time.

It is the schematic which shows the pipe line of repair object. It is a side view which shows the lining material for main pipes with the water expansion material for still water. It is a fragmentary sectional view which shows an example of the lining material for main pipes. It is explanatory drawing which shows the process of installing the rehabilitation pipe | tube for main pipes. It is a principal part detail drawing which shows the state which installed the rehabilitation pipe | tube for main pipes. It is a side view which shows the lining material for attachment pipes with the water expansion material for water stop. It is explanatory drawing which shows the state which installed the rehabilitation pipe | tube for attachment pipes. It is a principal part enlarged view of FIG. It is a perspective view which shows a connection part covering body. It is explanatory drawing which shows the installation operation | work of a connection part coating | covering body. It is sectional drawing which shows the installation state of a connection part covering body. It is explanatory drawing which shows the process of installing the rehabilitation pipe | tube for main pipes. It is explanatory drawing which shows the state which installed the rehabilitation pipe | tube for attachment pipes. It is a principal part enlarged view of FIG. It is a perspective view which shows the hat-shaped water expansion material for water stop. It is explanatory drawing which shows the installation state of the water expansion material for water stop. It is explanatory drawing which shows the state which installed the rehabilitation pipe | tube. It is explanatory drawing which shows the connection part covering body with the water expansion material for water stop. It is explanatory drawing which shows the installation state of a connection part covering body. It is explanatory drawing which shows the state which installed the rehabilitation pipe | tube.

[First Embodiment]
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing an example of a pipe line to be repaired. As shown in the figure, a main pipe 102 is connected in communication between two manholes 100-1 and 100-2 buried in the ground, and sewage from the eaves 104 flows into the main pipe 102. An attachment tube 106 is connected. The present invention is for repairing the connecting portion between the main pipe 102 and the mounting pipe 106 in which inflow of groundwater or earth and sand is likely to occur. In addition, the figure used for description of this invention has shown and emphasized the principal part, and has not shown the actual dimension ratio.

  FIG. 2 is an explanatory view showing a main pipe lining material used to obtain the repair structure of the present invention and a water stop water expansion material provided on the outer peripheral surface thereof. The lining material 30 has a cylindrical shape formed in accordance with the size of the main pipe to be repaired, and a water expansion water expansion material 40 is provided in a predetermined region of the outer peripheral surface 30 a of the lining material 30. The water expansion material 40 for water stop is provided in a cylindrical shape continuously in the circumferential direction in this predetermined area, and this predetermined area is the main pipe in the main pipe 102 (see FIG. 1) installed in the main pipe lining material 30. This is a region including the connection portion between 102 and the mounting tube 106 and the vicinity thereof. In the installation work of the main pipe lining material 30 to be described later, the main pipe lining material 30 is installed so that the connecting portion between the main pipe 102 and the attachment pipe 106 is located between both ends of the water expansion material 40 for water stop.

  The lining material 30 itself excluding the water expansion material for water stop may be a conventionally used one, and a curable lining material cured by light or heat, a thermoplastic lining material, or the like can be used. FIG. 3 is a partial cross-sectional view showing an example of a curable lining material. The curable lining material 30 includes a base material layer 32 containing a curable resin composition, an inner protective film 34 laminated on the inner side of the base material layer 32, and an outer protective film 36 laminated on the outer side of the base material layer 32. And have.

  The base material layer 32 can be formed by impregnating a base material such as glass fiber with a curable resin composition. The curable resin composition may be a thermosetting resin composition or a photocurable resin composition. The thickness of the base material layer 32 is appropriately selected depending on the pipe to be repaired. Generally, the thickness of the base material layer 32 is increased as the pipe diameter or pipe thickness of the pipe to be repaired is increased.

  The inner protective film 34 and the outer protective film 36 may be a film such as a polyethylene film or a PET film. By providing these films, the handleability of the base material layer 32 containing the curable resin composition having fluidity is improved.

  The water expansion material 40 for water stop shown in FIG. 2 contains a water expansion component and has a void in a non-expanded state. As the water-swelling component, for example, water-swelling fibers or water-swelling particles made of a water-swelling polymer (such as sodium polyacrylate) or a water-swelling rubber can be used. As the water expansion material 40 for water stop, a fiber material (for example, a nonwoven fabric, a woven fabric, a knitted fabric, etc.) containing a water expansion component can be used. As such a fiber material, the whole may consist of a water-expandable fiber, or a combination of a water-expandable fiber and a non-water-expandable fiber (polyester fiber such as polyethylene fiber or PET) is used as a fiber material, A non-water-expandable fiber material containing water-expandable particles can be used. In the case of a fiber material in which water-swelling fibers and non-water-swelling fibers are combined, the weight ratio of the water-swelling fibers is preferably 40% or more. Moreover, not only a fiber material but foams, such as an open-cell foam containing a water expansion | swelling component, can also be used as a water expansion material for water stop. When the water-swelling material for waterstop absorbs water, the water-swelling component contained in the water-swelling material for waterstop expands, the internal voids decrease or disappear, the route through which water passes is cut off, and waterstop is exhibited. The water expansion material for waterstop is formed from a fiber material, a foam, or the like, and has a void (a gap between fibers in the case of a fiber material, or a bubble portion in the case of a foam) inside. When groundwater reaches the water expansion material for water stoppage, it passes through the gap and penetrates to the inside of the water expansion material for water stoppage, and then the water expansion component expands. Can exhibit water-stopping properties.

It is preferable that the water expansion material 40 for still water is in a state compressed in the installed state. Thereby, the space | gap in the water expansion material 40 for water stop decreases, and the outstanding water stop effect by a water expansion effect is exhibited. For example, the thickness of the water expansion material for water stop is, for example, 3 to 15 mm in the non-compressed state before installation (normal state), and is, for example, 1 to 5 mm in the compressed state. The density in the non-expanded state in which the water expansion material 40 for water stoppage is installed can be appropriately set according to the type and form of the water expansion component used, for example, water expansion made of a water expansion polymer. 0.16 to 0.4 g / cm ³ in the case of a water-swelling material for waterstop made of a nonwoven fabric produced by combining fibers and non-expanded fibers made of polyester fibers at a mass ratio of 4: 6 to 6: 4. is there. In addition, in this invention, unless otherwise indicated, the water expansion material for water stop shall include both the state before expanding with water, and the state after expanding.

  FIG. 4 is an explanatory diagram showing a process of forming a main pipe rehabilitation pipe inside the main pipe 102 using the main pipe lining material 30 described above. In this embodiment, an example using a lining material that is cured by light such as ultraviolet rays will be described.

  First, the lining material 30 with a water expansion material for water stop shown in FIG. 2 (main pipe lining material) is folded and introduced into the main pipe 102 by a conventional pull-in method or reversal method. The part is sealed with a sealing member 60. Next, a gas such as air is supplied from the work machine 110 through the hose 120 to the sealed space, and the lining material 30 (the area where the water-stopping water expansion material 40 is provided) is connected to the main pipe 102. It is in a state of being in close contact with the inner surface. The supplied gas is recovered through the hose 122 by the work machine 112 to adjust the pressure in the sealed space to a constant pressure. Thereafter, the main lining material 30 is cured by moving the light irradiation device 60 while irradiating the main lining material 30 with light by the movable light irradiation device 60 arranged in advance inside the lining material 30. Let A plurality of lamps 62 are connected to the light irradiation device 60, and the movement thereof is performed by pulling with the cable 114.

  After the main pipe lining material 30 is hardened, the light irradiation device 60 is removed, and a pipe opening treatment of the hard main pipe lining material (main pipe rehabilitation pipe) is performed. Further, for the connection portion of the main pipe 102 to the attachment pipe 106, the hardened main pipe lining material 30 and the water-stopping water expansion material 40 are excised in accordance with the opening of the connection portion between the main pipe 102 and the attachment pipe 106. To do. The excision of the opening can be performed by a conventional method. For example, a movable cutting machine is arranged inside the hardened main pipe lining material 30 and moved to the connecting portion, and then the cutting machine This can be done by cutting the lining material 30 after curing with a cutter into a circular shape.

  Through the above operation, the main pipe rehabilitation pipe 30 in which the main pipe lining material 30 is hardened is formed inside the main pipe 102. FIG. 5 is an enlarged view of a main part of a connection portion between the main pipe 102 and the attachment pipe 106 in a state where the main pipe rehabilitation pipe 30 is formed. As shown in the drawing, a portion of the hardened main pipe lining material 30 that is connected to the attachment pipe 106 is cut off.

  Next, the lining is similarly performed on the attachment pipe 106. FIG. 6 is a side view showing the lining material for the mounting pipe. A water expansion material 44 for water stop is provided in a cylindrical shape continuously in the circumferential direction in a region having a predetermined length from one end of the outer peripheral surface 42a of the lining material 42 for mounting pipes. The material of the mounting pipe lining material 42 and the water expansion material 44 for water stop may be the same as the material for the main pipe lining 30 and the water expansion material 40 for water stop, and the thickness depends on the diameter of the mounting pipe to be repaired. Are appropriately selected.

  The introduction work and the hardening work of the lining material 42 for the mounting pipe can be performed by a conventional method. For example, after the mounting pipe lining material 42 is folded and introduced into the mounting pipe 106 (see FIG. 4), a gas such as air is introduced into the mounting pipe lining material 42 (the water expansion material 44 for water stoppage). The provided region is formed by curing with water or light in a state in which the water expansion material 44 for water stop is in close contact with the inner surface of the attachment tube 106.

  FIG. 7 is an explanatory view showing a state in which the attachment pipe rehabilitation pipe 42 is formed inside the attachment pipe 106 by using the attachment pipe lining material 42, and FIG. 8 is a detailed view of the connection portion and its vicinity in FIG. . As shown in the drawing, the main pipe rehabilitation pipe 30 is installed in close contact with the main pipe 102 through the water expansion material 40 for water stop at the connection portion between the main pipe 102 and the mounting pipe 106 and in the vicinity thereof. The pipe rehabilitation pipe 42 is installed in close contact with the attachment pipe 106 via a water stop water expansion material 44. As a result of introducing the gas during the above-described lining material contact work, the water expansion members 40 and 44 for water stoppage are pressed and compressed by the lining materials 30 and 42, and in this compressed state, the main pipe 102 and the main body 102 are compressed. It is provided between the pipe rehabilitation pipe 30 and between the attachment pipe 106 and the attachment pipe rehabilitation pipe 42.

  By disposing the water expansion material for water stop 40 in this way, when the ground water reaches the water expansion material for water stop 40 through the gap at the connection portion between the main pipe 102 and the attachment pipe 106, the water expansion material for water stop When the water-swelling fiber contained in 40 expands and the voids disappear, the route through which water passes is cut off, and water-stopping performance is exhibited. Thereby, inflow of groundwater and earth and sand into a pipe line is prevented.

  In addition, since the curable resin composition that mainly constitutes the lining material before curing has fluidity, the water expansion material 40, 44 for water stoppage is used at the time of the adhesion work of the lining materials 30, 42 by introducing the gas. Since the curable resin composition at the location where it is provided flows to the location where the water expansion material 40, 44 for water stop is not provided and cures in that state, the inner diameter of each rehabilitating tube 30, 42 is water. There is no significant difference between the location where the expandable members 40 and 44 are provided and the location where the expandable members 40 and 44 are not provided.

  In the present embodiment, as shown in FIGS. 2 and 6, the water expansion members 40 and 44 for water stop are shown in an example provided in a predetermined region of the outer peripheral surfaces 30 a and 42 a of the lining materials 30 and 42. However, it may be provided in the entire region of the outer peripheral surfaces 30a and 42a.

  Further, in the present embodiment, the example in which each water-stopping water expansion material is provided in advance on the outer peripheral surface of the lining material is shown, but the water-stopping water expansion material and the lining material are separately introduced into the main pipe and the attachment pipe. May be installed. In this case, the water-stopping water expansion material formed in a cylindrical shape is first introduced into the main pipe, and then the lining material is introduced inside the cylindrical water-stopping water expansion material introduced. Thereafter, the lining material is cured as described above to obtain a main pipe rehabilitation pipe. Next, a cylindrical water expansion material for water stop is introduced into the mounting pipe, and a lining material is introduced inside the water expansion material for water stop. Then, as described above, the lining material is cured to obtain a rehabilitation pipe for a mounting pipe. Thereby, the repair structure in which the water expansion material for water stop was provided between the main pipe, the main pipe renovation pipe, and the attachment pipe and the renovation pipe for the attachment pipe is obtained.

[Second Embodiment]
Hereinafter, a second embodiment of the repair structure of the present invention will be described. FIG. 9 is a perspective view showing an example of a connecting portion covering used for obtaining the repair structure of the present invention. As shown in the figure, the connecting portion covering body 10 includes a cylindrical portion 12 and a hook-shaped portion 14 that extends outward from one end of the cylindrical portion 12. The bowl-shaped portion 14 has a shape in which a central portion of a rectangular flat plate material is cut out in a circular shape, and the shape has a curved surface shape slightly curved along the inner surface shape of the main pipe to be installed. doing.

  The shortest length L from the inner edge portion to the outer edge portion of the bowl-shaped portion 14 may be appropriately selected according to the size of the pipe to be repaired, but is advantageously at least 5 cm, preferably 10 to 30 cm. is there. The outer diameter of the cylindrical portion 12 is formed to be substantially the same as or slightly smaller than the inner diameter of the mounting pipe to be installed. The axial length H of the cylindrical portion is, for example, 5 to 30 cm. The thickness of the cylindrical part 12 and the bowl-shaped part 14 is 1-5 mm, for example.

  As the material of the connecting portion covering 10, a water-impermeable material such as rubber or plastic is used. Even if there is some distortion on the inner surface of the mounting pipe or the main pipe, the degree of adhesion is increased due to the followability, so that it is preferably made of rubber. And in order to prevent a water leak reliably, it is preferable that the whole connection part covering body 10 is integrally molded.

  FIG. 10 is an explanatory diagram of the operation of installing the connection portion covering 10 at the connection portion between the main pipe 102 and the attachment pipe 106. As shown in the drawing, an attachment device 50 that is movable in the main pipe 102 and has a plate portion 52 for holding the connection portion covering body 10 is carried in from one manhole 100-2. A cable 56 is connected to the end of the attachment device 50, and the attachment device 50 can be moved by drawing the cable 56 with the work machine 114. In addition, the attachment device 50 is provided with a camera (not shown). When the attachment device 50 is carried into the main tube 102, the operator confirms the position of the attachment device 50 in the main tube 102 from the image of the camera on the ground. And move it closer to the connection. Thereafter, the plate portion 52 of the attachment device 50 is moved in the direction of the arrow to install the connection portion covering body 10 at the connection portion between the main pipe 102 and the attachment pipe 106.

  Note that an adhesive is applied in advance to the outer surface of the connection portion covering body 10, whereby the main tube 102 and the inner peripheral surface of the attachment tube 106 are adhered and fixed to the connection portion. Before installing the connecting portion covering 10, the inside of the pipe line may be cleaned in advance by high-pressure cleaning or the like.

  FIG. 11 is a cross-sectional view of the connection portion after the connection portion covering 10 is installed. As shown in the figure, the cylindrical portion 12 of the connecting portion covering body 10 covers the inner peripheral surface in the vicinity of the main tube 102 of the attachment tube 106, and the flange portion 14 covers the inner peripheral surface in the vicinity of the attachment tube 106 of the main tube 102. It is covered.

  Next, a main pipe rehabilitation pipe and a mounting pipe rehabilitation pipe are formed using the main pipe lining material and the mounting pipe lining material. FIG. 12 is an explanatory view showing a process of forming a main pipe rehabilitation pipe using the main pipe lining material 30 shown in FIG. 2 inside the main pipe 102. The method for forming the main pipe rehabilitation pipe may be the same as the method described in the first embodiment. After the main pipe rehabilitation pipe 30 is formed, a mounting pipe rehabilitation pipe is also formed inside the mounting pipe 106 using the mounting pipe lining material 42 shown in FIG.

  FIG. 13 is an overall view after all the steps are completed, and FIG. 14 is a detailed view of the connecting portion between the main pipe and the attachment pipe in FIG. As shown in the drawing, at the connection portion between the main tube 102 and the attachment tube 106 and in the vicinity thereof, the attachment tube 106 side, the attachment tube 106, the connection portion covering 10, the water expansion material 44 for water stop, and the attachment tube rehabilitation tube 42 in order from the outside. Are stacked in this order. On the main pipe 102 side, the main pipe 102, the connecting portion covering 10, the water stop water expansion material 40, and the main pipe rehabilitation pipe 30 are stacked in this order from the outside.

  By having such a structure, the following effects can be obtained. That is, the presence of the water-impermeable connecting portion covering body 10 can block the inflow of groundwater and earth and sand flowing from the gap between the main pipe 102 and the attachment pipe 102. Further, even if the amount of groundwater flowing in is large and the inflow cannot be prevented only by the connection portion covering body 10, the connection portion covering body 10 and the main pipe rehabilitation pipe 30 or the attachment pipe rehabilitation pipe 42 can be prevented. The presence of the water expansion materials 40 and 44 for stopping water provided therebetween can prevent the underground water and earth and sand from flowing into the rehabilitation pipe. Further, since the connecting portion covering body 10 is interposed between the water expansion material 40, 44 for water stop and the main pipe 102 and the attachment pipe 106, the groundwater flowing from between the main pipe 102 and the attachment pipe 106 is connected. Since the water expansion material 40, 44 for waterstop is absorbed by being absorbed by the part covering body 10, the length necessary for the water expansion material 40, 44 for waterstop to expand and exhibit waterstop is ensured. be able to.

[Third Embodiment]
Next, a third embodiment will be described. FIG. 15 is a perspective view showing a water expansion material for water stop used in the third embodiment. As shown in the figure, the water expansion material 70 for water stop has a hat shape, and extends outward from one end of the cylindrical portion 72 and a cylindrical portion 72 that covers the inner peripheral surface of the mounting pipe. And a hook-like portion 74 formed in a protruding manner. The size of the cylindrical portion 72 may be the same as the size of the cylindrical portion 12 of the connection portion covering 10 described in the first embodiment. Moreover, the bowl-shaped part 74 is disk shape, and has the shape where the center part was notched circularly. The shortest length from the inner edge portion to the outer edge portion of the bowl-shaped portion 74 may be appropriately selected according to the size of the pipe to be repaired, but is advantageously at least 5 cm, preferably 10 to 30 cm. . The thickness of the cylindrical part 72 and the bowl-shaped part 74 is 3-15 mm in an uncompressed state (normal state), for example. The water expansion material 70 for water stop can use the material similar to the water expansion agents 40 and 44 for water stop of 1st Embodiment.

  In order to obtain the repair structure of the present invention by using this water-stopping water expansion material 70, first, the water-stopping water expansion material 70 is installed at the connection portion between the main pipe 102 and the attachment pipe 106, as shown in FIG. . In order to install the water expansion material 70 for water stop at the connection portion, an adhesive is applied in advance to the outer surface of the water expansion material 70 for water stop, and the attachment device 50 shown in FIG. 10 of the second embodiment is used. Just do it. In the state where it is installed in the connecting portion, the outer surface of the cylindrical portion 72 of the water expansion material for water stop 70 covers the inner surface in the vicinity of the main tube 102 of the attachment tube 106, and the flange portion 74 of the water expansion material for water stop 70 is the main surface. The inner surface of the tube 102 in the vicinity of the attachment tube 106 is covered.

  After the installation work of the water expansion material 70 for water stop is completed, the rehabilitation pipe is formed by the main pipe lining material and the attachment pipe. Each lining material used in the present embodiment is a conventionally used lining material in which a water expansion material for water stop is not provided on the outer peripheral surface. That is, the water expansion materials 40 and 44 for water stop of the lining materials 30 and 42 shown in FIGS. 2 and 6 are not provided.

  The method for installing each lining material may be the same as the method described in the first embodiment. FIG. 17 is a cross-sectional view showing a state where the main pipe rehabilitation pipe and the attachment pipe rehabilitation pipe are formed and repairs are completed. The water expansion material 70 for water stop is provided in a compressed state by a pressing force at the time of close contact work of each lining material. The thickness of the water expansion material 70 for water stop in the compressed state is, for example, 1 to 5 mm.

[Fourth Embodiment]
Next, a fourth embodiment will be described. FIG. 18 is a perspective view illustrating a connection portion covering body 90 with a water expansion material for water stop, in which a water expansion material for water stop is provided on the connection portion covering body 10 illustrated in FIG. 9 of the second embodiment. As shown in the figure, a water-stopping water expansion material 46 is provided on the entire inner surface of the connection portion covering body 10 in the installed state, and the connection portion covering body 10 and the waterstop water expansion member 46 are integrated. The connection part covering body 10 itself may be non-permeable, and rubber or film is used.

  In order to obtain a repair structure using such a water-swelling connecting member covering member 90 with water-stopping material, first, as shown in FIG. Installed at the connection with the tube 106. An adhesive is applied in advance to the outer surface of the connection portion covering body 10 of the connection portion covering body 90 with a water expansion material for still water, and the outer surface of the cylindrical portion 12 is in contact with the inner peripheral surface of the attachment tube 106 to form a bowl shape. The outer surface of the portion 14 is fixed in contact with the inner peripheral surface of the main pipe 102.

  After the installation work of the connection cover 90 with the water expansion material for water stop is completed, the main pipe rehabilitation pipe and the attachment pipe rehabilitation pipe are formed as in the third embodiment. FIG. 20 is a cross-sectional view showing a state where the main pipe rehabilitation pipe and the attachment pipe rehabilitation pipe are formed and repair is completed. The water expansion material for water stop 46 is provided in a compressed state by a pressing force at the time of close contact work of each lining material.

  The present invention is not limited to the configuration of each of the above embodiments, and various modifications are possible within the scope of the gist of the invention. In the above-described embodiment, the sewage pipe is shown as an example of the pipe, but the present invention is not limited to this, and the present invention can be applied to any pipe that includes a connection portion of an attachment pipe connected to the main pipe.

DESCRIPTION OF SYMBOLS 10 Connection part covering body 12 Cylindrical part 14 Gutter-like part 30 Main pipe lining material (main pipe rehabilitation pipe)
32 Base material layer 34 Inner protective film 36 Outer protective film 40 Water expansion material 42 for water stop 42 Lining material for attachment pipe (rehabilitation pipe for attachment pipe)
44 Water-stopping water expansion material 50 Mounting device 52 Plate portion 60 Light irradiation device 62 Lamp 70 Water-stopping water-expanding material 72 Cylindrical portion 74 Cage-like portion 90 Connection portion covering body 100-1 and 100-2 with water-stopping water-expanding material Manhole 102 Main pipe 104 桝 106 Mounting pipe

Claims (9)

In the connecting portion between the main pipe and the mounting pipe, in the repair structure of the pipe line having the main pipe rehabilitation pipe provided inside the main pipe and the mounting pipe rehabilitation pipe provided inside the mounting pipe,
At least in the connection portion and the vicinity thereof, a gap is formed between the main pipe and the main pipe rehabilitation pipe and between the attachment pipe and the attachment pipe rehabilitation pipe and includes a water expansion component and is in an unexpanded state. A repair structure comprising a water expansion material for water stop.   A cylindrical portion that covers the inner peripheral surface of the mounting pipe in the vicinity of the main pipe, and extends outward from one end of the cylindrical section and covers the inner peripheral surface of the main pipe in the vicinity of the mounting pipe The repair structure according to claim 1, further comprising a water-impermeable connecting portion covering body having a flange-like portion that is provided on an outer side of the water expansion material for water stoppage.   The repair structure according to claim 1, wherein the water expansion material for water stop is a fiber material including water expansion fibers or water expansion particles as the water expansion component.   The repair structure according to any one of claims 1 to 3, wherein the water expansion material for water stop is provided in a compressed state.   The repair structure according to any one of claims 2 to 4, wherein the connecting portion covering body is made of rubber. A repair method for forming the repair structure according to claim 1,
A main lining material provided with a water expansion material for water stop including a water expansion component and having a void in a non-expanded state on the outer peripheral surface is introduced into the main pipe and cured to form a main pipe rehabilitation pipe. Rehabilitation pipe forming process for main pipe,
Rehabilitation for mounting pipe which introduces into the mounting pipe a lining material for water stop which includes a water expansion component and has a water expansion material for non-expanded water and provided with a gap in the outer peripheral surface, and cures it to form a rehabilitation pipe for the mounting pipe. Tube forming process;
A repair method characterized by comprising. A repair method for forming the repair structure according to claim 2,
Before the main pipe rehabilitation pipe forming step and the attachment pipe rehabilitation pipe forming step,
A cylindrical portion that covers the inner surface of the mounting pipe in the vicinity of the main pipe, and a hook-shaped section that extends outward from one end of the cylindrical section and covers the inner surface of the main pipe in the vicinity of the mounting pipe And a connection part covering body installation step of installing a water-impermeable connecting part covering body on the connection part. A repair method for forming the repair structure according to claim 1,
A cylindrical portion that covers the inner surface of the mounting pipe in the vicinity of the main pipe; and a hook-shaped portion that extends outward from one end of the cylindrical section and covers the inner surface of the main pipe in the vicinity of the mounting pipe; An installation step of installing a water expansion material for still water containing a water expansion component and having a void in a non-expanded state at the connection portion;
Main pipe lining material is introduced into the main pipe and cured to form a main pipe rehabilitation pipe forming step;
A lining material for a mounting pipe is introduced into the mounting pipe and cured to form a rehabilitation pipe for a mounting pipe that is cured to form a retreading pipe for a mounting pipe;
A repair method characterized by comprising. A repair method for forming the repair structure according to claim 2,
An installation step of installing, on the connection portion, a connection portion covering body with a water expansion material for water stop, in which an inner surface of the connection portion covering body includes a water expansion component containing a water expansion component and having a void in a non-expanded state. When,
Main pipe lining material is introduced into the main pipe and cured to form a main pipe rehabilitation pipe forming step;
A lining material for a mounting pipe is introduced into the mounting pipe and cured to form a rehabilitation pipe for a mounting pipe that is cured to form a retreading pipe for a mounting pipe;
Repair method including.

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