JP7169579B2 - Manhole repair method and manhole repair system - Google Patents

Description

The present invention relates to a manhole repair method and a manhole repair system, and more particularly to a repair method and system using a photocurable lining material.

The average sewerage coverage rate in Japan is about 70%, and in urban areas, the coverage rate is close to 100%. A sewage pipe deteriorates with long-term use, and its service life is generally assumed to be about 50 years. The total length of sewer pipes is about 400,000 km, and the number of manholes associated with it is about 6 to 7 million. There is an urgent need for repairs.

As a manhole repair method, a repair method using a backfilling material is generally known. In this construction method, for example, as described in Patent Document 1, a cylindrical repair material is assembled along the inner peripheral surface of the manhole, and a spacer is placed between the outer peripheral surface of the repair material and the inner peripheral surface of the manhole. to form a gap. By injecting a back-filling material such as mortar into this gap and hardening the back-filling material, the manhole and the repair material are integrated.

Patent Document 2 describes another repair method using a lining material obtained by impregnating a glass fiber base material with a photocurable resin composition without using a backfilling material. In this construction method, first, an uncured lining material in the form of a bottomed cylinder whose opening is sealed with a sealing member is introduced into the manhole in a folded state. After that, air is introduced into the lining material from the air inlet of the sealing member to expand the lining material, and the lining material is pressed against the inner wall of the manhole. In this state, light is irradiated from a light irradiation device introduced in advance into the inside of the bag-shaped lining material, and the lining material is photo-cured and integrated with the manhole.

Japanese Patent Application Laid-Open No. 2001-090173 JP 2014-076592 A

In the repair method using the backfilling material, it takes time to harden the backfilling material, so there is a problem that many manholes cannot be repaired quickly. In addition, the mortar used as the backfill material is injected and cured on site, but it is difficult to stabilize the quality because it is affected by the environment of the site, such as climate and temperature, and causes poor curing. Met.

On the other hand, the photocurable lining material can be cured in a shorter time than the backfilling material, so it has the advantage of shortening the working time and being less affected by the site environment.

However, in the method described in Patent Document 2, an exothermic reaction occurs when the lining material hardens, so there is a problem that the temperature inside the lining material rises and the lining material becomes too hot and deteriorates. rice field.

The present invention has been made in view of the above problems, and is a manhole repair method and repair system using a photocurable lining material that can suppress temperature rise of the lining material and ensure high quality. and to provide a repair system.

In order to achieve the above object, the manhole repair method according to claim 1 comprises:
A lining material installation step in which a cylindrical uncured photocurable lining material whose upper opening is closed with a closing tool is expanded in the manhole to press the outer peripheral surface of the photocurable lining material against the inner wall of the manhole. and a photo-curing step of curing the photo-curable lining material by irradiating light from the inside of the photo-curable lining material with a light irradiation device, wherein
The photocuring step includes
an air introduction operation of introducing compressed air into the blocked photocurable lining material through a vent pipe ;
an air evacuation operation for evacuating internal air above the blocked photocurable lining material;
including
The ventilation pipe is incorporated in the light irradiation device, and in an installation state in which the light irradiation device is introduced into the interior of the photocurable lining material, the compressed air is introduced at least below the photocurable lining material. Characterized by

According to this configuration, when the photocurable lining material installed in the manhole is photocured, compressed air is introduced into the interior of the photocurable lining material, and the internal air of the photocurable lining material is discharged at the same time. Therefore, the reaction heat generated by the light irradiation of the lining material can be discharged from the exhaust port while pressing the lining material against the inner wall of the manhole. As a result, the temperature rise of the lining material is suppressed, the deterioration of the lining material due to overheating is suppressed, and high repair quality can be ensured.

According to this configuration, it is possible to generate an air flow directed upward from the lower side of the photocurable lining material, and to effectively discharge reaction heat due to light irradiation to the outside.

According to this configuration, since the ventilation pipe is introduced at the same time as the light irradiation device is introduced into the lining material, the work can be simplified.

The invention according to claim 2 is the repair method according to claim 1 ,
The light irradiation device is
a plurality of tube-shaped light emitting units arranged vertically in an installed state;
a support that supports both ends of each light emitting part;
a pipe body extending between adjacent supports, wherein the ventilation pipe extends to below the photocurable lining material through the inside of the support body and the pipe body in an installed state. do.

According to this configuration, the ventilation pipe can be extended to below the photocurable lining material through the support and the pipe while avoiding the light-emitting portion.

The manhole repair method according to claim 3,
A lining material installation step in which a cylindrical uncured photocurable lining material whose upper opening is closed with a closing tool is expanded in the manhole to press the outer peripheral surface of the photocurable lining material against the inner wall of the manhole. and a photo-curing step of curing the photo-curable lining material by irradiating light from the inside of the photo-curable lining material with a light irradiation device, wherein
The photocuring step includes
an air introduction operation of introducing compressed air into the blocked photocurable lining material via a vent pipe passing through the obturator;
an air evacuation operation for evacuating internal air above the blocked photocurable lining material;
including
The light irradiation device includes a plurality of light emitting units arranged vertically in an installed state,
The vent pipe extends to below the photo-curable lining material in parallel with the plurality of light-emitting parts in an installed state, and introduces compressed air at least below the photo-curable lining material .
The invention according to claim 4 is the repair method according to claim 3,
The vent pipe is characterized by being transparent or translucent.

According to this configuration, the lining material can be irradiated with the light emitted from the light-emitting portion through the transparent or translucent ventilation pipe.

The invention according to claim 5 is the repair method according to claim 3 or 4 ,
The vent pipe extends in a wavy shape,
In the photo-curing step, the ventilation pipe and/or the light irradiation device are rotated around a predetermined axis extending in the vertical direction.

According to this configuration, it is possible to prevent the light emitted from the light-emitting portion from being always shadowed by the vent pipe at an arbitrary portion of the lining material, so that the lining material can be uniformly irradiated with light.

The invention according to claim 6 is the repair method according to any one of claims 3 to 5,
The light irradiation device is installed so that the plurality of light emitting units are positioned on the central axis of the manhole,
In the photo-curing step, the light irradiation device is rotated around the plurality of light-emitting portions.

According to this configuration, the lining material can be uniformly irradiated with the light from the light irradiation device, and the repair quality can be further improved.

The invention according to claim 7 is the repair method according to any one of claims 1 to 6 ,
In the photo-curing step, the light is irradiated while the light irradiation device is vertically reciprocated.

According to this configuration, the lining material can be uniformly irradiated with the light from the light irradiation device, and the repair quality can be further improved.

In addition, the manhole repair system according to claim 8 ,
A light irradiation device introduced into the inside of a cylindrical photocurable lining material introduced into the manhole for repairing the manhole, and a closing tool for closing an upper opening of the photocurable lining material. In the manhole repair system,
air supply means for introducing compressed air into the interior of the photocurable lining material through a vent pipe passing through the obturator;
an exhaust port provided in the obturator;
with
The ventilation pipe is incorporated in the light irradiation device, and in an installation state in which the light irradiation device is introduced into the interior of the photocurable lining material, the compressed air is introduced at least below the photocurable lining material. Characterized by
In addition, the manhole repair system according to claim 9,
A light irradiation device introduced into the inside of a cylindrical photocurable lining material introduced into the manhole for repairing the manhole, and a closing tool for closing an upper opening of the photocurable lining material. In the manhole repair system,
air supply means for introducing compressed air into the interior of the photocurable lining material through a vent pipe passing through the obturator;
an exhaust port provided in the obturator;
with
The light irradiation device includes a plurality of light emitting units arranged vertically in an installed state introduced into the interior of the photocurable lining material,
In the installed state, the vent pipe extends to a position below the photocurable lining material in parallel with the plurality of light emitting parts, and introduces compressed air at least below the photocurable lining material. .

According to this configuration, when the lining material is photo-cured, the compressed air can be introduced into the lining material from the ventilation pipe by the air supply means, and the air inside the lining material can be released to the outside by opening the exhaust port. Therefore, the reaction heat generated by the light irradiation of the lining material can be discharged from the exhaust port while the lining material is brought into close contact with the inner wall of the manhole by the introduced compressed air. This prevents the lining material from deteriorating due to overheating, and ensures high repair quality.

According to the manhole repair method and the manhole repair system of the present invention, by using a photocurable lining material, it is possible to shorten the time required for repair work, and the heat of reaction generated by light irradiation of the lining material is transferred to the lining material. Since the work can be performed while discharging the lining material to the outside, it is possible to suppress the temperature rise of the lining material and ensure high repair quality.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows typically 1st Embodiment of the manhole repair system of this invention. The figure explaining the repair process of a manhole. The figure explaining the repair process of a manhole. The figure explaining the repair process of a manhole. The figure explaining the repair process of a manhole. Sectional drawing which shows typically 2nd Embodiment of the repair system of a manhole. Sectional drawing which shows the modification 1 of a repair system. Sectional drawing which shows the modified example 2 of a repair system. FIG. 10 is a view showing Modification 3 of the repair system, (a) is a cross-sectional view showing the opening of the lining material closed by the obturator, and (b) is a meshing state between the obturator and the second gear. Plan view.

(First embodiment)
FIG. 1 is a cross-sectional view schematically showing a repair system for a manhole buried in the ground according to a first embodiment of the present invention. It should be noted that the drawings used for explaining the present invention emphasize the essential parts and do not show actual dimensional ratios. The manhole 70 to be repaired is arranged at regular intervals with respect to the sewer culvert buried in the ground. 74 are attached with each end inserted. Further, the manhole 70 of the present embodiment has a straight wall portion 70a extending cylindrically upward (in the direction toward the ground) from the bottom, and a straight wall portion 70a located above the straight wall portion 70a and having an outer diameter that gradually decreases upward. and a slanted wall portion 70b whose wall surface is slanted so as to

A repair system 10 for a manhole 70 includes a cylindrical photocurable lining material 20 as a repair material, a light irradiation device 30 for irradiating the lining material 20 with light, and a closing member 40 for closing the opening of the lining material 20. , a first pipe 50 forming a ventilation pipe for introducing compressed air into the interior of the lining material 20, a second pipe 55 forming an exhaust pipe for discharging the air inside the lining material 20, and the light irradiation device 30 are reciprocatingly rotated. and a rotary drive device 60 for motion.

The lining material 20 is used for rehabilitation of the manhole 70, is flexible in an uncured state, and has a bottom that conforms to the shape of the manhole 70 so that it has an outer diameter corresponding to the inner diameter of the manhole 70 after curing. Alternatively, it is formed in a bottomless cylindrical shape. As the material of the lining material 20, conventionally used materials can be used, for example, an impregnated base material made of fibers (eg, fiber base materials such as glass fibers and polyester fibers, and non-woven fabric such as felt) and a photocurable resin. Those impregnated with the composition can be used. The photocurable resin composition may contain, for example, a polymerizable resin, a polymerizable unsaturated monomer, and a photopolymerization initiator. As the polymerizable resin, unsaturated polyester, vinyl ester resin, or the like may be used. . As the photopolymerization initiator, for example, an ultraviolet polymerization initiator that accelerates the polymerization of the resin by ultraviolet rays can be used. is preferred. The lining material 20 of the present embodiment has an impregnated base material made of glass fiber, is in the shape of a bottomless cylinder, and has a straight wall adapted to the straight wall portion 70a and the slanted wall portion 70b of the manhole 70, respectively. It has a tubular portion 20a for the wall and a tubular portion 20b for the inclined wall.

The lining material 20 may further include an inner film 22 and an outer film 24 that protect the inner and outer surfaces, respectively. As the inner film 22 and the outer film 24, for example, a polyethylene film, a polypropylene film, a polyethylene terephthalate film, or the like can be used. The inner film 22 is transparent to at least the light emitted from the light irradiation device 30 , and the outer film 24 prevents the light emitted from the light irradiation device 30 from transmitting to the outside of the photocurable lining material 20 . Instead, it is preferable to use a light-shielding film so that it can be used for the photo-curing reaction. As the light-shielding film, for example, a laminated film having a yellow or other colored film layer between two transparent polyethylene films can be used. In addition, the inner film 22 can be configured to be peeled off after the lining material 20 is cured.

The thickness of the inner film 22 and the outer film 24 can be, for example, 0.3 mm to 0.5 mm, and the thickness of the lining material 20 without them can be, for example, 3 mm to 20 mm. These thicknesses can be appropriately set according to the inner diameter of the manhole 70 to be repaired.

In this embodiment, as shown in FIG. 1, the lining material 20 and the outer film 24 are formed in a cylindrical shape having the same size as the inner peripheral wall of the manhole 70, and the inner illum 22 is longer than these and has a lower end portion. is formed in such a size as to cover the bottom surface of the manhole 70 . A lower end opening of the inner film 22 is hermetically closed by a disc-shaped plate 26 .

The light irradiation device 30 includes a plurality of light emitting units 31 connected in a row, supports 32 supporting both ends of each light emitting unit 31, pipes 33 extending between adjacent supports 32, , and is connected to a work machine (not shown) arranged on the ground via a cable material 35 .

In the present embodiment, the light emitting unit 31 is a tubular lamp (for example, a metal halide lamp, a mercury lamp, a gallium lamp, etc. that can irradiate wavelengths in the range of ultraviolet to visible light). Both ends are supported by supports 32 . In the illustrated example, five tubular lamps are used as the light emitters 31, but the number of the light emitters 31 is not limited to this, and may be two or more. One or more pipe bodies 33 are installed between adjacent supports 32, and preferably three pipe bodies 33 are installed at equal intervals in the circumferential direction. A lead wire for supplying electric power to the light-emitting part 31 is inserted through the pipe body 33, and this lead wire passes through the inside of a cable material 35, one end of which is attached to the support body 32, to supply power to the work machine on the ground. connected to the Lighting and extinguishing of each light emitting unit 31 can be individually controlled by a control device in the working machine.

The light irradiation device 30 further includes a first pipe 50 for introducing compressed air into the lining material 20 . One end of the first pipe 50 is connected to a compressor (air supply means) (not shown) disposed on the ground, and passes through the inside of the cable material 35, the support 32 and the pipe 33 to the light irradiation device 30. extending to the tip. By arranging the first pipe 50 in this way, the first pipe 50 is extended to the tip of the light irradiation device 30 arranged below the lining material 20 while avoiding the light emitting part 31 in the light irradiation device 30. be able to.

The first pipe 50 allows compressed air to flow out from a tip opening 50a located at least at the tip of the light irradiation device 30 (the lower end of the light irradiation device 30 shown in FIG. 1). Air outlets are formed at positions where the support member 32 is arranged, and the pressurized air is configured to be able to flow out from each of the air outlets. In FIG. 1, the arrows indicate the air flows flowing out from the tip opening 50a and each air outlet. The first pipe 50 is preferably configured such that the flow rate of air flowing out from the tip opening 50a is greater than the flow rate of air from each air outlet. Further, it is possible to appropriately adjust the amount of air introduced by the air supply means so that the air flow generated in the manhole 70 becomes turbulent.

The obturator 40 includes a disk-shaped obturator main body 42 to be inserted into the opening of the lining material 20, a lid member 45 for closing a device insertion through-hole 44 formed inside the obturator main body 42, and a lining. and a band member 48 for clamping to the outer peripheral surface of the obturator body 42 of the material 20 .

The obturator main body 42 is formed of a highly rigid material such as a metal material, and includes a disk-shaped main body 41 and an annular ring protruding from the outer peripheral edge of the main body 41 toward one side of the main body 41 . and legs 43 . As described above, the main body 41 has a through hole 44 into which the light irradiation device 30 can be inserted, and a through hole (exhaust port) through which the second pipe 55 is inserted. Although the opening shape of the through-hole 44 is not particularly limited, it is formed in a substantially circular shape in the present embodiment. The diameter of the main body part 41 is formed to be larger than the diameter of the upper opening 70c of the manhole 70, and is formed to be slightly larger than the upper opening 70c of the manhole 70 from the viewpoint of reducing the weight of the main body part 41. is preferred. The leg portion 43 protrudes so as to be flush with the outer peripheral surface of the main body portion 41 , thereby widening the clamping area facing the band member 48 .

The band member 48 is formed in a band-like shape, and in a state in which the upper end portion of the lining material 20 is sandwiched between the band member 48 and the outer peripheral surface of the closure body 41, the band member 48 is tightened in the direction of diameter reduction to fix the lining material. The open end of 20 is closed.

The cover member 45 is formed to have a size capable of closing the through-hole 44. In the present embodiment, the through-hole formed on the lower surface side of the main body portion 41 (the surface side facing the manhole 70 in the installed state). Downward movement is regulated by a stepped portion that reduces the diameter of 44 , and through hole 44 is closed in a state where upward movement is regulated by stopper 59 . An insertion hole 46 through which the cable material 35 can be inserted is formed in the central portion of the lid member 45 (see FIGS. 2 and 3). Note that the lid member 45 has a configuration that can be divided into halves along a dividing line passing through the insertion hole 46 in a plan view. The insertion hole 46 is formed so as to be positioned on the central axis of the manhole 70 (that is, the central axis of the straight wall portion 70a of the manhole 70) when the closure body 41 is installed on the manhole 70 in the repair process. It is

The second pipe 55 is a pipe inserted through the through-hole of the closure main body 41 as described above, and is provided with a valve 57 capable of opening and closing the pipe. One end of the second pipe 55 inserted into the lining material 20 is closed so that the end opening 55a is located near the top of the manhole 70 or the top opening of the lining material 20 in the installed state shown in FIG. It protrudes from the lower surface of the tool main body 41 . The other end of the second pipe 55 can be connected to a deodorizer (not shown) having a harmful substance removal filter in the photo-curing step of curing the lining material 20 .

The rotation drive device 60 rotates the light irradiation device 30 around a predetermined axis extending in the vertical direction (that is, the vertical direction that is the axial direction of the manhole 70) in the photocuring step. In the photo-curing step, the light irradiation device 30 is rotated reciprocatingly at a small angle so that the plurality of light-emitting portions 31 arranged in the vertical direction serve as the central axis of rotation. Here, reciprocating rotational movement at a small angle means that the light irradiation device 30 repeats clockwise and counterclockwise rotational movement at an angle of less than 360° around the axis (that is, an angle that does not make a full circle). The small angle of reciprocating rotary motion is preferably an angle of 180° or less, more preferably an angle of 60° or less.

In FIG. 1, only the main part of the power transmission mechanism of the rotary drive device 60 is shown. A rotary drive device 60 of the present embodiment includes a first gear 62 fixed to a rigid cable member 35 and a second gear 64 meshing with the first gear 62 . The mounting position of the rotary drive device 60 is not limited to the illustrated example, and can be set as appropriate. A shaft member 63 that supports the second gear 64 extends parallel to the cable member 35, and is rotated by a driving device such as a motor (not shown) to rotate the shaft member 63 together with the second gear 64. gear 64 rotates, and accordingly the first gear 62 rotates together with the cable material 35 . As shown in FIG. 1, in the installed state, the cable member 35 and the plurality of light emitting portions 31 extend vertically so as to be coaxial. rotate around.

The repair system 10 may further include a vertical motion drive device (not shown) for vertically moving the light irradiation device 30 in the photocuring process, as indicated by the double-headed arrow A in FIG.

Next, a method for repairing the manhole 70 using the repair system 10 described above will be described.

First, as shown in FIG. 2, after the attachment holes 72a and 72b are closed with water stop members 75 and 76 to block the flow of sewage, the uncured lining material 20 is introduced into the manhole 70 (see FIG. 2). lining material introduction process). As the waterproof members 75 and 76, a rubber packer that expands by supplying a fluid such as air to the inside can be used. The tubular lining material 20 has a lower opening on the bottom side of the manhole 70 closed by the inner film 22 and the plate 26, and an upper opening on the upper side of the manhole 70 closed by the closing member 40. It is introduced into the manhole 70 by using a crane while suspended by the wire ropes 68 and 69 attached to the closure 40 . The lower end of the inner film 22 is fastened and fixed to the outer peripheral surface of the plate 26 by a band member 28 to close the lower opening. Note that the illustration of the band member 28 is omitted in FIG. In the illustrated example, the insertion hole 46 of the lid member 45 is closed by the closing member 49, but the insertion hole 46 may be opened.

Next, as shown in FIG. 3, compressed air is supplied into the lining material 20 to expand the lining material 20 to a desired size, and then, as shown in FIG. (light irradiation device introduction step). Compressed air can be supplied into the lining material 20 through the second pipe 55 by connecting the second pipe 55 to a compressor, which is air supply means. Instead of the second pipe 55 , another pipe may be inserted through the insertion hole 46 and compressed air may be supplied from this pipe.

After the lining material 20 is expanded to the extent that the light irradiation device 30 can be introduced inside, the lid member 45 is removed, the light irradiation device 30 is introduced from the through hole 44, and then the lid member 45 is attached again and penetrated. The hole 44 is closed. The light irradiation device 30 is introduced with each light emitting unit 31 turned off.

Thereafter, compressed air is further introduced to expand the lining material 20, and the outer peripheral surface of the lining material 20 is pressed against the inner wall 72 of the manhole 70 (lining material installation step). After the light irradiation device 30 is introduced, it is possible to supply compressed air into the lining material 20 from the first pipe 50 built in the light irradiation device 30 . As shown in FIG. 1, in the present embodiment, the length of the lining material 20 (the length of the photocurable member excluding the inner film 22) is set to reach the bottom of the manhole 70. The length is not limited to this, and can be set as appropriate. For example, the length of the lining material 20 may be set up to the upper end positions of the mounting holes 72a and 72b.

The light irradiation device introduction step of introducing the light irradiation device 30 into the lining material 20 may be performed after the lining material 20 is completely expanded in the manhole 70 by the lining material installation step. Alternatively, in the lining material introduction step, the interior of the lining material 20 is sufficiently expanded on the ground, and the light irradiation device 30 is inserted into the interior thereof, and then the light irradiation device 30 is inserted using a crane. The lining material 20 may be introduced into the manhole 70 .

Next, as shown in FIG. 1, the inside of the lining material 20 is irradiated with light from the light irradiation device 30 to cure the curable resin composition contained in the lining material 20 (photocuring step). In the photo-curing process, an air introducing operation for introducing compressed air from the first pipe 50 into the closed lining material 20 and an air discharging operation for discharging internal air from the lining material 20 via the second pipe 55 are performed. done at the same time. It is preferable that such a ventilation operation is always performed during the photocuring process. In addition, in the air introduction operation, relatively low-temperature air (for example, air having a temperature lower than the internal temperature of the lining material 20, more preferably air cooled by a cooling device) is used so as to cool the heat generated by photocuring. is introduced. Further, in the present embodiment, in the photo-curing step, the light irradiation device 30 is reciprocally rotated around the light emitting portion 31 by the rotary drive device 60, and the light irradiation device 30 is vertically moved within the lining material 20 by the vertical movement drive device. I am moving

After the lining material 20 has hardened, as shown in FIG. 5, the light irradiation device 30 and the obturator 40 are removed, the inner film 22 is peeled off, and the hardened lining material 20 is treated (pipe treatment). step), the water stop members 75 and 76 are removed. In the pipe opening treatment step, the lining material 20 is cut off at the joints between the manhole 70 and the sewage pipes 73 and 74 and at the upper opening 70c of the manhole 70 in accordance with the shape of the opening. The cutting of the lining material 20 can be performed, for example, by cutting the hardened lining material 20 into a circular shape with a cutter of a cutting machine. As a result, the inner wall 72 of the manhole 70 is covered with the lining material 20 integrally cured.

In the repair method of the manhole 70 described above, when the lining material 20 installed in the manhole 70 is photo-cured, compressed air is introduced into the lining material 20 from the first pipe 50, and at the same time, the lining material is introduced from the second pipe 55. By discharging the internal air of the material 20, while pressing the lining material 20 against the inner wall 72 of the manhole 70, the inside of the manhole 70 is ventilated and the reaction heat generated by the light irradiation of the lining material 20 is discharged. be able to. Thereby, it is possible to prevent the lining material 20 from deteriorating due to overheating and ensure high repair quality. Further, since the first pipe 50 is built in the light irradiation device 30, installation is easy, and work can be simplified. Furthermore, since the compressed air is introduced below the lining material 20 through the first pipe 50 and the internal air above the lining material 20 (closer to the ground) is discharged through the second pipe 55, the air is directed upward from below. The heat of reaction can be effectively discharged to the outside of the lining material 20 by generating an air flow. Instead of the above-described embodiment, compressed air is introduced from the opening 55a of the second pipe 55 so that the air flow in the manhole 70 is directed downward from above, and the air is sucked from the tip opening 50a of the first pipe 50. It is good also as a structure discharged|emitted outside. Further, by properly adjusting the amount of introduced air to make the airflow in the manhole 70 turbulent, the heat transfer coefficient can be increased and the inside of the manhole 70 can be effectively cooled.

Further, in the photo-curing step, the inner circumferential surface of the lining material 20 can be uniformly irradiated with light by reciprocatingly rotating the light irradiation device 30 about the light emitting portion 31 positioned on the central axis of the manhole 70 as the center of rotation. In addition, it is possible to prevent the light emitted from the light emitting part 31 from always shadowing the pipe body 33 at an arbitrary portion of the lining material 20 . Thereby, the uniformity of the cured quality of the lining material 20 can be maintained at a high level. Furthermore, in the photo-curing process, the lining material 20 can be irradiated with light more uniformly by vertically moving the light irradiation device 30 with the vertical movement driving device.

By using the vertical movement driving device, the light irradiation device 30 can be moved up and down even when the number of the light emitting units 31 of the light irradiation device 30 is small and the entire area of the lining material 20 in the vertical direction cannot be irradiated with light at once. It is possible to light-cure the entire area of the lining material 20 by reciprocating in the direction.

(Second embodiment)
Next, a second embodiment of the repair system 10 will be described using FIG. FIG. 6 is a cross-sectional view similar to FIG. 1 schematically showing a second embodiment of the repair system 10, and portions corresponding to those of the first embodiment are denoted by the same reference numerals. Further, in the second embodiment described below, detailed description of the same configuration as that of the first embodiment will be omitted.

In this embodiment, the light-emitting portion of the light irradiation device 30 is configured by an LED (light-emitting diode) 38 . Specifically, the light irradiation device 30 includes a plurality of cylindrical body portions 37 connected in a row, LEDs 38 provided on the outer peripheral surface of each body portion 37, and both ends of each body portion 37. and a first pipe 50 built in the light irradiation device 30 .

The main body portion 37 can be formed in a cylindrical shape or a prismatic shape, and in the case of a prismatic shape, the LEDs 38 are preferably arranged at equal intervals on each side wall. As an example, the body portion 37 can be formed in an octagonal prism shape, and four LEDs 38 can be arranged at regular intervals on each side wall.

The first pipe 50 has one end connected to a compressor, which is an air supply means, and extends to the tip of the light irradiation device 30 through the inside of the cable member 35 , the support 32 and the main body portion 37 . The first pipe 50 allows compressed air to flow out from at least a tip opening 50a located at the tip of the light irradiation device 30. In the present embodiment, air outlets are formed at positions where the support 32 is arranged. and configured to allow the compressed air to flow out from each air outlet. In FIG. 6, the arrows indicate the air flow flowing out from the tip opening 50a and each air flow outlet. The first pipe 50 is preferably adjusted so that the flow rate of air flowing out from the tip opening 50a is greater than the flow rate of air from each air outlet. Further, the air supply means can appropriately adjust the amount of air so that the air flow generated inside the manhole 70 becomes turbulent.

The repair system 10 of the second embodiment can repair the manhole 70 by the same repair process as in the first embodiment. Further, by configuring the light-emitting portion with a plurality of LEDs 38 as described above, the inner peripheral surface of the lining material 20 can be uniformly irradiated with light without using the rotation drive device 60 or the vertical motion drive device. can. In the second embodiment, the light irradiation device 30 may be rotated reciprocatingly or moved up and down by the rotary drive device 60 or the vertical motion drive device. is better.

Next, a modified example of the repair system 10 will be described with reference to FIGS. 7 to 9. FIG. 7 to 9, parts corresponding to those in the first embodiment are denoted by the same reference numerals. Further, in the modifications described below, detailed descriptions of the same configurations as those of the first embodiment are omitted.

(Modification 1)
FIG. 7 is a cross-sectional view similar to FIG. 1 showing Modification 1 of the repair system. In this modification, a first pipe 52 for supplying compressed air into the lining material 20 in the photo-curing process is provided separately from the light irradiation device 30 .

The first pipe 52 has one end, the proximal end, connected to the compressor. The first pipe 52 penetrates through the closure body 41, and the other end, the distal end, is connected to the lining material in the installed state shown in FIG. 20, and the compressed air flows out from the tip opening 52a. The first pipe 52 is transparent or translucent so that at least the region inserted into the lining material 20 can transmit light. In this modification, a plurality of air outlets 52b are further formed in the area inserted into the lining material 20, and compressed air is supplied to the inside of the lining material 20 from each of the air outlets and the tip opening 52a. be. The first pipe 52 can be inserted inside the lining material 20 together with the light irradiation device 30 in the step of introducing the light irradiation device.

By providing the first pipe 52 in this way, while avoiding complication of the light irradiation device 30, the light from the light emitting part 31 can be transmitted through the transparent or translucent first pipe 32 to the lining material 20. can be properly illuminated.

(Modification 2)
FIG. 8 is a cross-sectional view similar to FIG. 1 showing Modification 2 of the repair system. In this modified example, a first pipe 53 provided separately from the light irradiation device 30 extends in a wavy shape in a region where the first pipe 53 is inserted into the lining material 20 .

The first pipe 53 is transparent or translucent at least in the region inserted into the lining material 20, and extends below the lining material 20 substantially parallel to the plurality of light emitting parts 31 in the installed state. , the compressed air flows out from the tip opening 53a. In this modification, the air can flow out from a plurality of air outlets 53b formed in the wavy region.

In this manner, the first pipe 53 is formed in a wavy shape, and the light irradiation device 30 is reciprocatingly rotated by the rotary drive device 60 in the photo-curing process, so that the light emitted from the light emitting part 31 is always directed to the first pipe. A shadow can be prevented, and the lining material 20 can be uniformly irradiated with light. In addition to the rotational movement of the light irradiation device 30, the first pipe 53 may be rotated by a pipe rotation driving device (not shown), and by rotating the first pipe 53 itself, the first pipe It is possible to reduce the influence of shadows caused by the shadows 53 and irradiate the lining material 20 with light more uniformly. The pipe rotation drive device can have the same configuration as the rotation drive device 60, and rotates the first gear fixed to the first pipe 53 by the rotational driving force of the second gear meshing therewith. , the first pipe 53 can be rotated reciprocally at a small angle.

(Modification 3)
9A and 9B are diagrams showing Modification 3 of the repair system, in which (a) is a cross-sectional view showing the opening of the lining material blocked by the obturator, and (b) is the structure between the obturator and the second gear. It is a top view which shows a meshing state. In this modified example, the light irradiation device 30 and the first pipe 53 shown in modified example 2 are rotated by the same rotary drive device.

As shown in FIG. 9(a), the lid member 45 of the obturator 40 is formed to have a relatively large diameter, and the cable member 35 and the first pipe 53 pass through respective insertion holes formed in the lid member 45. It is fixed to the lid member 45 in a penetrating state. Gear teeth that mesh with the second gear 64 are formed on the upper outer peripheral surface of the lid member 45 formed in a cylindrical shape. In this rotary drive device, as shown in FIG. 9(b), when the second gear 64 is rotated around the shaft member 63 by the drive device, the lid member 45 meshing therewith rotates the cable member 35, which is a rigid body, as the rotation axis. rotate as In this modification, the lid member 45 is rotated reciprocally at a small angle by changing the rotation direction of the second gear 64 at predetermined intervals by means of a driving device. In this way, by rotating the first pipe 53 and the light irradiation device 30 with the same rotary drive device, the number of parts of the rotary drive device can be reduced and the device can be simplified.

The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the scope of the invention.

REFERENCE SIGNS LIST 10 repair system 20 lining material 22 inner film 24 outer film 30 light irradiation device 31 light emitting unit 32 support 33 pipe body 40 obturator 42 obturator main body 48 band member 50 first pipe (vent pipe)
55 second pipe (exhaust pipe)
60 rotary drive device 70 manhole 73, 74 sewage pipe

Claims (9)

A lining material installation step in which a cylindrical uncured photocurable lining material whose upper opening is closed with a closing tool is expanded in the manhole to press the outer peripheral surface of the photocurable lining material against the inner wall of the manhole. and a photo-curing step of curing the photo-curable lining material by irradiating light from the inside of the photo-curable lining material with a light irradiation device, wherein
The photocuring step includes
an air introduction operation of introducing compressed air into the blocked photocurable lining material through a vent pipe ;
an air evacuation operation for evacuating internal air above the blocked photocurable lining material;
including
The ventilation pipe is incorporated in the light irradiation device, and in an installation state in which the light irradiation device is introduced into the interior of the photocurable lining material, the compressed air is introduced at least below the photocurable lining material. Characteristic manhole repair method. The light irradiation device is
a plurality of tube-shaped light emitting units arranged vertically in an installed state;
a support that supports both ends of each light emitting part;
a pipe body extending between adjacent supports, wherein the ventilation pipe extends to below the photocurable lining material through the inside of the support body and the pipe body in an installed state. The manhole repair method according to claim 1 A lining material installation step in which a cylindrical uncured photocurable lining material whose upper opening is closed with a closing tool is expanded in the manhole to press the outer peripheral surface of the photocurable lining material against the inner wall of the manhole. and a photo-curing step of curing the photo-curable lining material by irradiating light from the inside of the photo-curable lining material with a light irradiation device, wherein
The photocuring step includes
an air introduction operation of introducing compressed air into the blocked photocurable lining material via a vent pipe passing through the obturator ;
an air evacuation operation for evacuating internal air above the blocked photocurable lining material;
including
The light irradiation device includes a plurality of light emitting units arranged vertically in an installed state,
The manhole is characterized in that the ventilation pipe extends below the photo-curable lining material in parallel with the plurality of light-emitting parts in an installed state, and introduces compressed air at least below the photo-curable lining material. repair method. The manhole repairing method according to claim 3, wherein the vent pipe is transparent or translucent. The vent pipe extends in a wavy shape,
5. The manhole repair according to claim 3 or 4 , characterized in that in the photo-curing step, the vent pipe and/or the light irradiation device rotates around a predetermined axis extending in the vertical direction. Construction method. The light irradiation device is installed so that the plurality of light emitting units are positioned on the central axis of the manhole,
The manhole repairing method according to any one of claims 3 to 5, wherein in the photo-curing step, the light irradiation device is rotated around the plurality of light-emitting portions. The manhole repairing method according to any one of claims 1 to 6 , characterized in that, in the photo-curing step, light is applied while reciprocating the light irradiation device in the vertical direction. A light irradiation device introduced into the inside of a cylindrical photocurable lining material introduced into the manhole for repairing the manhole, and a closing tool for closing an upper opening of the photocurable lining material. In the manhole repair system,
air supply means for introducing compressed air into the interior of the photocurable lining material through a vent pipe passing through the obturator;
an exhaust port provided in the obturator;
with
The ventilation pipe is incorporated in the light irradiation device, and in an installation state in which the light irradiation device is introduced into the interior of the photocurable lining material, the compressed air is introduced at least below the photocurable lining material. A manhole repair system characterized by: A light irradiation device introduced into the inside of a cylindrical photocurable lining material introduced into the manhole for repairing the manhole, and a closing tool for closing an upper opening of the photocurable lining material. In the manhole repair system,
air supply means for introducing compressed air into the interior of the photocurable lining material through a vent pipe passing through the obturator;
an exhaust port provided in the obturator;
with
The light irradiation device includes a plurality of light emitting units arranged vertically in an installed state introduced into the interior of the photocurable lining material,
In the installed state, the vent pipe extends to a position below the photocurable lining material in parallel with the plurality of light emitting parts, and introduces compressed air at least below the photocurable lining material. Manhole repair system.

Images