JP7074572B2 - Existing pipe rehabilitation method, existing pipe rehabilitation structure, pipe making equipment and elastic sealing material - Google Patents

Description

The present invention relates to a method for rehabilitating an existing pipe that has deteriorated, a method for rehabilitating an existing pipe, etc. Regarding the existing pipe rehabilitation structure, etc.

It is known to rehabilitate an existing pipe such as an aged sewer pipe by lining it with a rehabilitation pipe (see Patent Document 1 and the like). Normally, a mounting pipe (branch pipe) is connected to the existing pipe via a connection port. After installing the rehabilitation pipe, the rehabilitation pipe is drilled to form a communication port with the connection port.

As the rehabilitation pipe, for example, a strip-shaped member (profile) formed into a spiral tubular shape by a pipe making device is known. A groove extending in the band length direction is formed on the outer peripheral side surface of this type of band-shaped member (the surface facing the outer peripheral side when the pipe is manufactured) (see Patent Document 2 and the like).
As a method of making a pipe, a main push type that pushes the rehabilitated pipe into the existing pipe while making the rehabilitated pipe in the manhole on one end side of the existing pipe, or a wire and a winch to point the tip of the rehabilitated pipe toward the manhole on the opposite side. A retractable traction type is known.

JP-A-2017-203530 Japanese Patent No. 5372840

When a rehabilitation pipe made of the strip-shaped member with a groove is drilled to form a communication port, a groove of the strip-shaped member is opened on the peripheral surface of the communication port. Since the groove opening is easily clogged with debris and may hinder the flow from the mounting pipe, it is necessary to close the groove opening with a repair material or a backfill material after drilling. Therefore, there is a problem that the construction time is long.
In view of such circumstances, the present invention shortens the construction period by eliminating the need for closing the groove opening after drilling when rehabilitating an existing pipe by manufacturing a spiral tubular rehabilitation pipe from a strip-shaped member with a groove. With the goal.

In order to solve the above-mentioned problems, the existing pipe rehabilitation method according to the present invention has an existing spiral tubular rehabilitation pipe made of a band-shaped member having a groove extending in the band length direction on the outer peripheral side surface and having a connection port with a mounting pipe. It is a method of rehabilitating the existing pipe by covering the inner circumference of the pipe.
When the rehabilitation pipe is manufactured, a strip-shaped elastic sealing material is fitted from the outer peripheral side into the groove corresponding to the connection port corresponding to the connection port in the rehabilitation pipe and the groove around the connection port.
After that, the hole corresponding to the connection port is drilled and the elastic sealing material of the connection port corresponding portion is cut off.
A communication port is formed by the drilling. An elastic encapsulant is pre-embedded in the groove opening facing the communication port. Therefore, it is possible to omit the process of closing the groove opening with a repair material or a backfill material after drilling. As a result, the construction period for rehabilitation work can be shortened.

While making the rehabilitation pipe in the manhole connected to one end of the existing pipe, it is sent out to the existing pipe.
When the portion corresponding to the connection port is located between the pipe making portion and the existing pipe, it is preferable to fit the elastic encapsulant.
According to this method, when the portion corresponding to the connection port is sent out from the pipe making device and exposed in the manhole, the fitting work can be facilitated by fitting the elastic sealing material. The rehabilitation pipe is manufactured by a push type or a traction type.
Preferably, the rehabilitation pipe is sent into the existing pipe to cover the inner circumference of the existing pipe, and then the portion corresponding to the connection port is drilled to form a communication port.

The existing pipe rehabilitation structure according to the present invention includes a rehabilitation pipe coated on the inner circumference of the existing pipe having a connection port with a mounting pipe.
The rehabilitation tube is a spiral tubular member made of a band-shaped member having a groove extending in the band length direction on the outer peripheral side surface.
A communication port is formed in the portion of the rehabilitation tube corresponding to the connection port.
An elastic encapsulant that can be fitted from the outer peripheral side is embedded in the groove in the peripheral portion of the communication port.
The elastic encapsulant is characterized in that it has a spiral strip shape extending along the groove and is cut off at the communication port.
The groove in the rehabilitation tube becomes spiral. A spiral strip-shaped elastic encapsulant is fitted into the spiral groove around the communication port.
The groove is opened in the communication port, and the groove opening is closed by an elastic sealing material. Therefore, it is possible to prevent the groove opening from being clogged with miscellaneous substances, and it is possible to secure the flowability at the communication port.

In the existing pipe rehabilitation structure, the width of the outer peripheral side opening of the groove is narrower than the groove width inside the groove.
The elastic encapsulant includes a sealing strip that is fitted into the groove through the outer peripheral opening, and the natural width of the sealing strip is at least the outer periphery of the outer peripheral opening width and the groove width. It is preferably larger than the side opening width.
The outer peripheral side opening width may be narrower than the maximum groove width inside the groove.
The natural state of the sealed strip means a state in which the sealed strip is not elastically deformed.
The sealing strip when attached to the strip-shaped member is inserted into the outer peripheral side opening of the groove in a state of being elastically deformed so as to be compressed in the width direction, and elastically returns to widen when passing through the outer peripheral side opening. And fits inside the groove.
Since the width of the sealing strip in the natural state is larger than the opening width on the outer peripheral side, it is possible to prevent the sealing strip from coming off the groove after being accommodated in the groove.
More preferably, the natural width of the sealing strip is larger than the groove width. As a result, the sealing strip is brought into close contact with the inner wall of the groove, and the sealing strip can be more reliably prevented from coming off the groove, and the sealing performance can be improved.

In the pipe making device according to the present invention, a strip-shaped member having a groove extending in the strip length direction on the outer peripheral side surface is made into a spiral tubular rehabilitation pipe, and on the inner circumference of an existing pipe having a connection port with a mounting pipe. A pipe making device that covers the rehabilitation pipe.
A pipe making section installed in a manhole connected to one end of the existing pipe and sending out the rehabilitated pipe to the existing pipe while making the pipe.
A feeding part that feeds out a strip-shaped elastic encapsulant,
When the connection port corresponding portion corresponding to the connection port in the rehabilitation pipe is located between the pipe making portion and the existing pipe, the elastic sealing material from the feeding portion is applied to the connection port corresponding portion and its surroundings. A fitting jig that fits into the groove from the outer peripheral side,
It is characterized by being equipped with.
According to the pipe making device, the rehabilitation pipe can be made by a push type or a traction type. In addition, the elastic encapsulant can be fitted in the manhole. After the pipe is made, the portion corresponding to the connection port is drilled to form the communication port, and the groove appears in a state where the groove opens in the communication port and the groove opening is closed by the elastic sealing material. Therefore, it is not necessary to close the groove opening after drilling.
Preferably, the fitting jig is removable from the pipe making portion.

The fitting jig has a holding portion that pushes the elastic encapsulant into the groove at a fixed position.
It is preferable that the rehabilitated pipe is spirally sent out by the pipe-making portion so that the elastic encapsulant is fitted into the groove in the extending direction.
The elastic encapsulant can be fitted into the spiral groove by the cooperation of the fitting jig and the pipe making portion. In addition, the structure of the fitting jig can be simplified.

It is preferable that the fitting jig has a locking portion that is inserted into the groove on the upstream side in the feeding direction from the holding portion and is locked to the rehabilitation pipe.
As a result, the fitting jig can be prevented from being separated from or shaken from the rehabilitation tube, and the elastic sealing material can be reliably pushed into the groove of the strip-shaped member.

The grooves are formed at a plurality of positions in the band width direction on the outer peripheral side surface of the band-shaped member, and the elastic encapsulant contains a plurality of encapsulating strips.
It is preferable that the fitting jig straddles the plurality of positions and fits each sealing strip into the corresponding groove.
As a result, the sealing strips can be collectively fitted into the grooves of the strip-shaped members.

The elastic encapsulant has a plurality of encapsulating strips that are separate from each other, and each encapsulating strip has an outer periphery of a corresponding groove among the plurality of grooves formed on the outer peripheral side surface of the strip-shaped member. It may be fitted from the side.
Alternatively, the elastic encapsulant integrally has a plurality of encapsulating strips arranged in parallel with each other and a connecting portion connecting the encapsulating strips, and each encapsulating strip is the outer periphery of the strip-shaped member. Of the plurality of grooves formed on the side surface, the groove may be fitted into the corresponding groove from the outer peripheral side.
The width of the opening on the outer peripheral side of the groove is narrower than the groove width inside the groove.
It is preferable that the width of the sealing strip in a natural state is larger than at least the outer peripheral side opening width of the outer peripheral side opening width and the groove width.

According to the present invention, when rehabilitating an existing pipe by making a spiral tubular rehabilitation pipe from a strip-shaped member with a groove, it is possible to omit the closing process of the groove opening after drilling the communication port with the mounting pipe. , The construction period of rehabilitation work can be shortened.

FIG. 1 is a side sectional view showing an existing pipe (existing pipe rehabilitation structure) already configured with the rehabilitation pipe according to the first embodiment of the present invention. FIG. 2 is a plan sectional view of a peripheral portion of the connection port of the existing pipe with the mounting pipe. FIG. 3 is a side sectional view taken along the line III-III of FIG. FIG. 4 is an exploded cross-sectional view of the strip-shaped member and the elastic encapsulant constituting the rehabilitation tube. FIG. 5 is a side sectional view showing the method of rehabilitating the existing pipe in the step of fitting the elastic encapsulant. FIG. 6 is a plan sectional view showing an initial stage of a step of fitting the sealing strip in the starting manhole connected to the existing pipe. FIG. 7 is a side sectional view taken along the line VII-VII of FIG. FIG. 8 is a side sectional view of the existing pipe at the end of the pipe making process of the rehabilitated pipe. FIG. 9 is a cross-sectional view showing a peripheral portion of the connection port in the drilling process. FIG. 10 is a cross-sectional view showing a part of a rehabilitation tube made of a strip-shaped member according to a second embodiment of the present invention in a state where an elastic sealing material is provided. FIG. 11 is a cross-sectional view showing a part of a rehabilitation tube made of a strip-shaped member according to a third embodiment of the present invention in a state where an elastic sealing material is provided. FIG. 12 is a cross-sectional view showing a part of a rehabilitation tube made of a strip-shaped member according to a fourth embodiment of the present invention in a state where an elastic sealing material is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<Existing pipe 1>
1 to 9 show the first embodiment of the present invention. As shown in FIG. 1, the existing pipe 1 to be rehabilitated in the present embodiment is an underground sewer pipe. A connection port 2a is provided in the middle of the existing pipe 1, and a mounting pipe 2 (branch pipe) is connected to the connection port 2a.
The number of attachment pipes 2 connected in the rehabilitation target section of the existing pipe 1 is not limited to one, and may be plural.

<Rehabilitation tube 9>
The inner circumference of the existing pipe 1 is covered with the rehabilitation pipe 9. As a result, the existing pipe 1 has been rehabilitated.
The rehabilitation tube 9 is composed of a band-shaped member 90. The strip-shaped member 90 is spirally wound along the inner peripheral surface of the existing pipe 1 to form a spiral tubular rehabilitation pipe 9.

As shown in FIG. 4, the band-shaped member 90 includes a flat band portion 91, a rib 92, and fitting portions 93 and 94. The flat surface (lower surface in FIG. 4) of the flat band portion 91 constitutes the inner peripheral surface of the rehabilitation pipe 9. A plurality of ribs 92 are provided on the outer peripheral side portion (upper side in FIG. 4) of the flat band portion 91. These ribs 92 are formed in a T-shaped cross section and extend in the band length direction orthogonal to the paper surface of FIG. A groove 95 is formed between the ribs 92 adjacent to each other in the band width direction (left-right direction in FIG. 4). In other words, grooves 95 are formed at a plurality of positions in the band width direction on the outer peripheral side surface of the band-shaped member 90, respectively. Each groove 95 extends in the band length direction (direction orthogonal to the paper surface in FIG. 4) of the band-shaped member 90. As shown in FIG. 1, the groove 95 in the rehabilitation tube 9 made into a spiral tube has a spiral shape.

As shown in FIG. 4, an opening 95d to the outer peripheral side of the groove 95 is formed between the facing ends of the tip flanges 92f of the adjacent ribs 92. The width W _95d of the outer peripheral side opening 95d is narrower than the groove width W ₉₅ inside the groove 95 (W _95d <W ₉₅ ).

As shown in FIG. 4, a concave fitting portion 93 is formed at one end portion (left end portion in the figure) of the band-shaped member 90 in the band width direction. A convex fitting portion 94 is formed at the other end of the strip member 90 in the band width direction (the right end portion in the figure). As shown in FIG. 3, in the spiral tubular rehabilitation tube 9, the portions of the fitting portions 93 and 94 facing each other with a pitch deviation of one pitch are fitted to each other.
Although not shown, the band-shaped member 90 is printed with a scale indicating the band length measured from a predetermined reference point (for example, the tip portion).

The material of the band-shaped member 90 is a synthetic resin such as polyvinyl chloride. Preferably, the strip-shaped member 90 has a rigidity such that the rehabilitation pipe 9 can be a self-supporting pipe. The band-shaped member 90 may include a reinforcing band material made of a metal such as steel in addition to the band body made of the synthetic resin.

As shown in FIGS. 1 and 2, a communication port 9c is formed in the portion 9b corresponding to the connection port 2a in the rehabilitation tube 9. The communication port 9c is connected to the connection port 2a. As a result, the inside of the rehabilitation pipe 9 is connected to the attachment pipe 2 via the communication port 9c and the connection port 2a.

As shown in FIGS. 2 and 3, the elastic sealing material 10 is embedded in the groove 95 in the peripheral portion (hereinafter referred to as “groove sealing region 9R”) of the communication port 9c. The elastic encapsulant 10 has a spiral strip shape and is provided over the entire length of the spiral groove 95 in the groove encapsulation region 9R. However, the elastic sealing material 10 is cut off at the communication port 9c.
As shown in FIG. 3, the communication port 9c faces 90 g of the machined end surface of the strip-shaped member 90 and 10 g of the machined end surface of the elastic encapsulant 10. The peripheral surface of the communication port 9c is formed by the cut end surfaces 90g and 10g.

By opening the groove 95 into the communication port 9c, the communication port side groove opening 95c is formed. The groove opening 95c is closed by the elastic encapsulant 10.

The elastic encapsulant 10 is made of an elastic body such as rubber or resin. Preferably, the material of the elastic encapsulant 10 is rubber such as chloroprene rubber (CR) and ethylene propylene diene rubber (EPDM). The hardness of the elastic encapsulant 10 is preferably as low as possible, more preferably about 0 ° to 30 °. The rubber may be a foam. In that case, the closed cell ratio is preferably 70% or more in order to provide water stoppage.

As shown in FIGS. 2 and 4, the elastic encapsulant 10 is composed of a plurality of encapsulating strips 11 that are separate from each other. Each sealing strip 11 has a spiral strip shape extending along the groove 95. The sealing strip 11 has a one-to-one correspondence with the groove 95 of the strip-shaped member 90. A corresponding sealing strip 11 is fitted in each groove 95. The cross-sectional shape of each sealing strip 11 is matched to the cross-sectional shape of the corresponding groove 95. The natural width W ₁₁ of the sealing strip 11 is at least larger than the outer peripheral side opening width W _95d of the corresponding groove 95 outer peripheral side opening width W _95d and the inner groove width W ₉₅ (W ₁₁ > W _95d ). .. As shown by the alternate long and short dash line in FIG. 4, the sealing strip 11 can be fitted into the corresponding groove 95 from the outer peripheral side opening 95d while being compressed and deformed in the width direction, and passes through the outer peripheral side opening 95d. It can be elastically restored so as to widen.
The outer peripheral side surface (upper side surface in FIG. 4) of the sealing strip 11 is substantially flush with the outer peripheral side surface of the strip-shaped member 90.

The axial length of the groove sealing region 9R along the tube axis direction of the rehabilitation tube 9 is, for example, about several tens of cm to several m, preferably about 1 m. A communication port 9c is arranged at the center of the groove sealing region 9R. The distance from the center of the communication port 9c to both ends of the groove sealing region 9R is preferably about 50 cm, respectively.
The length of the sealing strip 11 depends on the axial length and the peripheral length of the groove sealing region 9R, but is, for example, about several tens of meters.

<Pipe making device 3>
FIG. 5 shows the existing pipe 1 under rehabilitation work in a state when the sealing strip 11 is fitted. The rehabilitation pipe 9 is made by a pipe making device 3. The pipe making device 3 includes a pipe making portion 3a schematically shown in the figure and an elastic sealing material fitting means 20.

The pipe making portion 3a is installed in the starting manhole 4 connected to one end of the existing pipe 1. Although detailed illustration is omitted, the pipe making portion 3a includes a pair of pinch rollers, a drive source such as a motor, and a gear group for connecting the drive source and each pinch roller so as to be able to transmit torque. The mating portions 93 and 94 facing the unmade pipe portion 99 in the strip-shaped member 90 and the spirally piped portion 9a are sandwiched and fitted by a pair of pinch rollers. As a result, the production of the rehabilitation tube 9 proceeds. The rehabilitation pipe 9 is sent out to the existing pipe 1 while being rotated along with the pipe making. The delivery method may be a main push type (FIG. 5) in which the pipe making device 3 takes a reaction force and pushes out, or a traction type (not shown) in which the wire and winch are pulled toward the reaching side manhole 4B.

As shown in FIGS. 6 and 7, the fitting means 20 is detachably attached to the pipe making portion 3a. The fitting means 20 fits the elastic sealing material 10 into the groove 95 of the groove sealing region 9R (connection port corresponding portion 9b and its periphery) of the rehabilitation pipe 9. Specifically, the fitting means 20 includes a reel 21 (feeding portion) and a fitting jig 22. The reels 21 are provided as many as the number of sealing strips 11. A corresponding sealing strip 11 is wound around each reel 21.
Although detailed illustration is omitted, the reel 21 is rotatable around its own axis and is connected to and supported by the pipe making portion 3a via a connecting means. The reel 21 may be supported by a support means different from the pipe making portion 3a.

The fitting jig 22 is arranged on the upper side of the rehabilitation pipe 9 between the pipe making portion 3a and the existing pipe 1. The fitting jig 22 has a jig base portion 23, a holding portion 24, and a locking portion 25.
The jig base portion 23 is formed, for example, in the shape of a rectangular plate. The longitudinal direction of the jig base portion 23 is oriented parallel to the tube axis of the rehabilitation tube 9. The base end portion (right end portion in FIG. 7) of the jig base portion 23 is detachably fixed to the pipe making portion 3a.

A holding portion 24 is provided on the lower surface of the jig base portion 23. The holding portion 24 is formed in the shape of a rectangular plate. The holding portion 24 is connected to the jig base portion 23 so that the angle can be adjusted and the angle can be fixed around the rotation shaft 28 that is vertical to the jig base portion 23. The angle fixing means includes, for example, an elongated hole 23a formed in the jig base portion 23 and a bolt 29. The elongated hole 23a has an arc shape centered on the rotation shaft 28. The bolt 29 is screwed into the holding portion 24 through the elongated hole 23a.

By the angle adjustment, the longitudinal direction of the holding portion 24 is tilted by the lead angle of the rehabilitation pipe 9 with respect to the longitudinal direction of the jig base portion 23, and is directed to the band width direction of the strip-shaped member 90 in the rehabilitation pipe 9. The holding portion 24 is pressed against the outer peripheral surface of the rehabilitation pipe 9 so as to straddle the plurality of grooves 95 (the plurality of positions in the band width direction) of the rehabilitation pipe 9.
The sealing strip 11 drawn out from the reel 21 is sandwiched between the holding portion 24 and the rehabilitation pipe 9. The holding portion 24 pushes the elastic sealing material 10 into the groove 95 of the rehabilitation pipe 9 at a fixed position.

A locking portion 25 is provided in a portion of the jig base portion 23 on the side of the pipe making machine 3a with respect to the holding portion 24. The locking portion 25 is formed in an L shape and protrudes downward from the jig base portion 23. The locking portion 25 is inserted into a groove 95 on the upstream side (right side in FIG. 7) of the holding portion 24 along the feeding direction of the rehabilitation pipe 9, and is locked to the rib 92 and thus the rehabilitation pipe 9.

<Rehabilitation method for existing pipes>
The existing pipe 1 is rehabilitated as follows.
The position of the connection port 2a with the mounting pipe 2 in the existing pipe 1 is measured in advance. Specifically, the distance L1 (FIG. 5) from the end of the existing pipe ₁ on the side of the reacher hole 4B to the center of the connection port 2a is measured. For example, the tip of a measure is attached to a remotely controllable self-propelled vehicle equipped with a TV camera, the self-propelled vehicle is run in the existing pipe 1, and the existing pipe 1 is taken from the self-propelled vehicle when the connection port 2a is photographed. Measure the distance to the end of the car with a measure.
Next, the band length L _90d from the tip 90e of the band-shaped member 90 to the sealing start portion 90d is calculated. More preferably, the band length L _90f from the tip 90e to the sealing end portion 90f is calculated. As shown in FIG. 2, the sealing start portion 90d is a portion corresponding to the end portion of the band-shaped member 90 on the reacher hole 4B side (left side in FIG. 2) of the groove sealing region 9R. The sealing end portion 90f is a portion of the band-shaped member 90 corresponding to the end portion of the groove sealing region 9R on the starter hole 4B side (right side in FIG. 2).
The band length L _90d up to the sealing start portion 90d is the diameter of the rehabilitation tube 9 to be manufactured, the width of the band-shaped member 90, the measurement distance L ₁ , and the set length L _9e of the extra length portion 9e of the rehabilitation tube 9. It can be calculated based on FIG. 8). The band length L _90f up to the sealing end portion 90f can be further calculated based on the axial length of the groove sealing region 9R.

Next, as shown in FIG. 5, a pipe making portion 3a is installed at the bottom of the starting manhole 4.
The strip-shaped member 90 is inserted into the manhole 4 from a take-up drum (not shown) on the ground and introduced into the pipe making portion 3a, and the existing pipe 1 is made while the spiral tubular rehabilitation pipe 9 is made by the pipe making portion 3a. Send to.
When the connection port corresponding portion 9b of the rehabilitation pipe 9 is located between the pipe making portion 3a and the existing pipe 1, the sealing strip 11 is fitted. Specifically, when the sealing start portion 90d of the strip-shaped member 90 is located between the pipe making portion 3a and the existing pipe 1, the pipe making portion 3a is temporarily stopped. By referring to the band length scale printed on the band-shaped member 90, the position of the sealing start portion 90d can be easily determined.
At this time, it is preferable that the sealing start portion 90d is separated from the pipe making machine 3a by a distance of 1 to 2 pitches of the rehabilitation pipe 9.

Next, as shown in FIG. 6, the sealing strip 11 is unwound from each reel 21 of the fitting means 20, and the tip end portion of the sealing strip 11 is fitted into the groove 95 in the sealing start portion 90d from the outer peripheral side. .. The tips of the plurality of sealing strips 11 are fitted into the corresponding grooves 95. The fitting work is performed manually. The length L ₁₁ of the sealing strip 11 to be manually fitted is preferably about L ₁₁ = 20 cm to 30 cm.
Next, the fitting jig 22 is attached to the pipe making portion 3a. The holding portion 24 of the fitting jig 22 is straddled over the tip portions of a plurality of sealing strips 11, and the tip portions of each sealing strip 11 are pressed by the holding portions 24.
Further, the locking portion 25 is locked to the rib 92 on the pipe making machine 3a side of the portion where the sealing strip 11 is fitted.
At this stage, since the groove sealing region 9R including the sealing start portion 90d is exposed in the manhole 4, the work can be easily performed.

Subsequently, the driving of the pipe making portion 3a is restarted. As the rehabilitation pipe 9 is spirally rotated by the pipe making, the sealing strip 11 is sequentially fed out from the reel and sent between the holding portion 24 and the rehabilitation pipe 9, and the outer circumference is increased by the holding portion 24. It is pushed into the groove 95 from the side opening 95d. As a result, the sealing strip 11 is sequentially fitted into the groove 95 along the extending direction. At this time, the sealing strip 11 is inserted into the outer peripheral side opening 95d while being compressed and deformed in the width direction, and when it passes through the outer peripheral side opening 95d, it elastically returns so as to widen and fits in the groove 95. The sealing strip 11 can be prevented from coming off the groove 95 once it is housed in the groove 95.
A plurality of sealing strips 11 are fitted into the corresponding grooves 95, respectively.
By locking the locking portion 25 to the rehabilitation pipe 9, it is possible to prevent the fitting jig 22 from floating or shaking from the rehabilitation pipe 9, and the fitting operation can be stably performed.
According to the pipe making device 3, the strip-shaped elastic sealing material 10 can be fitted into the spiral groove 95 by the cooperation between the fitting jig 22 and the pipe making portion 3a. It is not necessary for the fitting jig 22 to rotate or move in a spiral shape, and the structure of the fitting jig 22 can be simplified.

After the sealing strip 11 is fitted to the sealing end portion 90f, the pipe making portion 3a is stopped again, and the surplus sealing strip 11 is cut. The length of the sealing strip 11 may be adjusted to the length of the groove 95 from the sealing start portion 90d to the sealing end portion 90f, and in this case, the cutting work of the surplus sealing strip 11 is unnecessary. Is.
Further, the fitting means 20 is removed from the pipe making portion 3a, and the pipe making of the rehabilitation pipe 9 is restarted.
When there are a plurality of mounting pipes 2, the fitting means 20 may be left in the pipe making portion 3a for the sealing process of the connection port corresponding portion 9b to the next mounting pipe 2.
When there are a plurality of mounting pipes 2, the sealing process is performed on the portion 9b corresponding to the connection port for each mounting pipe 2.

In this way, as shown in FIG. 8, the pipe is manufactured until the extra length portion 9e at the tip of the rehabilitation pipe 9 in the delivery direction is projected into the reacher hole 4B. As a result, the rehabilitation pipe 9 is covered over the entire inner circumference of the existing pipe 1. By adjusting the length of the extra length portion 9e to the set length L _9e , the groove sealing region 9R and the connection port corresponding portion 9b are aligned with the connection port 2a.
The extra length portion 9e is excised before or after the drilling step described later.

As shown in FIG. 9, the connection port corresponding portion 9b is drilled by the drilling machine 5. The drilling position can be determined based on the measurement distance L ₁ (FIG. 5).
It is preferable that the drilling machine 5 can be remotely controlled. It is preferable to confirm the drilling position and check the drilling state by the self-propelled vehicle 6 equipped with the TV camera 6c and capable of remote control.
In FIG. 9, internal drilling is performed from inside the rehabilitation pipe 9, but an external drilling machine may be inserted into the mounting pipe 2 to perform external drilling.

As shown in FIG. 3, the strip-shaped member 90 and the elastic sealing material 10 of the connection port corresponding portion 9b are cut off by the drilling to form the communication port 9c and the groove 95 is opened in the communication port 9c. .. The groove opening 95c is closed by the work end surface 10g of the elastic encapsulant 10. Therefore, it is possible to omit the process of closing the groove opening 95c with a repair material or a backfill material after drilling. As a result, the construction period for rehabilitation work can be shortened.
By making the rehabilitation pipe 9 an independent pipe, it is not necessary to fill the backfill material between the existing pipe 1 and the rehabilitation pipe 9, and the construction period of the rehabilitation work can be further shortened.
Since the groove opening 95c is closed with the elastic sealing material 10, it is possible to prevent the groove opening 95c from being clogged with debris and ensure the flowability at the communication port 9c.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for configurations that overlap with the above-described embodiments, and the description thereof will be omitted.
<Second Embodiment>
FIG. 10 shows a second embodiment of the present invention.
In the second embodiment, the cross-sectional shape of the strip-shaped member 90B, particularly the fitting portions 93B and 94B, is different from that of the first embodiment.
The concave fitting portion 93B in the band-shaped member 90B has two concave grooves 96. The convex fitting portion 94B has two convex portions 97. The concave fitting portion 93B covers the convex fitting portion 94B from the outer peripheral side, and the convex portion 97 corresponding to each concave groove 96 is fitted.
The rib 92 of the strip-shaped member 90B protrudes from the fitting portion 93B toward the outer periphery.

In the groove sealing region 9R of the rehabilitation pipe 9, the groove 95B between the two ribs 92B adjacent to each other with the fitting portions 93B and 94B fitted to each other sandwiching the fitting portion 93B and 94B, the sealing strip 11B of the elastic sealing material 10B is formed in the groove 95B. Is provided. The sealing strip 11B covers the outer peripheral side (upper side in FIG. 10) of the fitting portion 93B. The outer peripheral side surfaces of the sealing strips 11 and 11B are substantially flush with the outer peripheral side surfaces of the strip-shaped member 90B.

<Third Embodiment>
FIG. 11 shows a third embodiment of the present invention.
In the third embodiment, the elastic encapsulant 10C is provided on the strip-shaped member 90 having the same cross-sectional shape as that of the first embodiment. The elastic sealing material 10C has a plurality of sealing strips 11C and a connecting portion 12 integrally. A plurality of sealing strips 11C are arranged in parallel with each other. A connecting portion 12 is provided between two adjacent sealing strips 11C. These sealing strips 11C are connected by the connecting portion 12. The thickness of the connecting portion 12 is preferably 0. It is several mm to several mm, more preferably about 1 mm.
A corresponding sealing strip 11C is fitted in each of the plurality of grooves 95 in the groove sealing region 9R of the rehabilitation pipe 9. Further, the connecting portion 12 covers the outer peripheral side surface of the strip-shaped member 90 so as to straddle between the grooves 95.
The outer peripheral side surface (upper surface in FIG. 11) of the elastic encapsulant 10C protrudes from the outer peripheral side surface of the strip-shaped member by the thickness of the connecting portion 12.
According to the third embodiment, the elastic encapsulant 10C can be collectively fitted into the grooves 95 of the plurality of strips 90.

<Fourth Embodiment>
FIG. 12 shows a fourth embodiment of the present invention.
In the fourth embodiment, the band-shaped member 90B having the same cross-sectional shape as that of the second embodiment is used. The elastic encapsulant 10D of the fourth embodiment is integrated as in the second embodiment. That is, the elastic sealing material 10D integrally has a plurality of sealing strips 11 and 11B arranged in parallel with each other and a connecting portion 12D connecting the sealing strips 11 and 11B.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the strip-shaped member may have a groove on the outer peripheral side surface, and the cross-sectional shape thereof is not limited to that of the embodiment.
The fitting jig 22 may be supported by a support means different from the pipe making portion 3a.
The rehabilitation process can be modified as appropriate. For example, a hole may be drilled after the elastic sealing material is fitted into the groove of the groove sealing region 9R of the rehabilitation pipe 9 and before the connection port corresponding portion 9b is sent into the existing pipe.

The present invention can be applied to rehabilitation of existing pipes such as sewer pipes.

1 Existing pipe 2 Mounting pipe 2a Connection port 3 Pipe making device 3a Pipe making part 4 Starting manhole (manhole)
9 Rehabilitation pipe 9b Connection port corresponding part 9c Communication port 9R Groove sealing area 10 Elastic sealing material 10B, 10C, 10D Elastic sealing material 11 Sealing strip 11B, 11C Sealing strip 12 Connecting part 12D Connecting part 21 Reel (Delivery part)
22 Fitting jig 24 Holding part 25 Locking part 90 Band-shaped member 90B Band-shaped member 95 Groove 95B Groove 95d Outer peripheral side opening W ₁₁ Width of the sealing strip in the natural state
W _95d Outer peripheral side opening width W ₉₅ Groove width

Claims (11)

A method of rehabilitating an existing pipe by covering the inner circumference of an existing pipe having a connection port with a mounting pipe with a spiral tubular rehabilitation pipe made of a band-shaped member having a groove extending in the band length direction on the outer peripheral side surface. And
When the rehabilitation pipe is manufactured, a strip-shaped elastic sealing material is fitted from the outer peripheral side into the groove corresponding to the connection port corresponding to the connection port in the rehabilitation pipe and the groove around the connection port.
After that, the existing pipe rehabilitation method is characterized in that the portion corresponding to the connection port is drilled and the elastic sealing material of the portion corresponding to the connection port is cut off. In the manhole connected to one end of the existing pipe, the rehabilitated pipe is sent out to the existing pipe while being made by the pipe making portion of the pipe making device .
The existing pipe rehabilitation method according to claim 1, wherein the elastic encapsulant is fitted when the portion corresponding to the connection port is between the pipe making portion and the existing pipe. Equipped with a rehabilitation pipe covered around the inner circumference of the existing pipe having a connection port with the mounting pipe.
The rehabilitation tube is a spiral tubular member made of a band-shaped member having a groove extending in the band length direction on the outer peripheral side surface.
A communication port is formed in the portion of the rehabilitation tube corresponding to the connection port.
An elastic encapsulant that can be fitted from the outer peripheral side is embedded in the groove in the peripheral portion of the communication port.
An existing pipe rehabilitation structure characterized in that the elastic encapsulant has a spiral strip shape extending along the groove and is cut off at the communication port. The width of the outer peripheral side opening of the groove is narrower than the groove width inside the groove,
The elastic encapsulant includes a sealing strip that is fitted into the groove through the outer peripheral opening, and the natural width of the sealing strip is at least the outer periphery of the outer peripheral opening width and the groove width. The existing pipe rehabilitation structure according to claim 3, wherein the width is larger than the side opening width. A pipe making device that manufactures a strip-shaped member having a groove extending in the strip length direction on the outer peripheral side surface into a spiral tubular rehabilitation pipe and covers the inner circumference of the existing pipe having a connection port with the mounting pipe. And,
A pipe making section installed in a manhole connected to one end of the existing pipe and sending out the rehabilitated pipe to the existing pipe while making the pipe.
A feeding part that feeds out a strip-shaped elastic encapsulant,
When the connection port corresponding portion corresponding to the connection port in the rehabilitation pipe is located between the pipe making portion and the existing pipe, the elastic sealing material from the feeding portion is applied to the connection port corresponding portion and its surroundings. A fitting jig that fits into the groove from the outer peripheral side,
A pipe making device characterized by being equipped with. The fitting jig has a holding portion that pushes the elastic encapsulant into the groove at a fixed position.
The pipe making apparatus according to claim 5, wherein the rehabilitated pipe is spirally sent out by the pipe making portion, so that fitting into the groove proceeds in the extending direction of the elastic encapsulant. 6. The sixth aspect of claim 6, wherein the fitting jig has a locking portion that is inserted into the groove on the upstream side of the holding portion in the feeding direction and is locked to the rehabilitation pipe. Pipe making equipment. The grooves are formed at a plurality of positions in the band width direction on the outer peripheral side surface of the band-shaped member, and the elastic encapsulant contains a plurality of encapsulating strips.
The pipe making device according to any one of claims 5 to 7, wherein the fitting jig straddles the plurality of positions and fits each sealing strip into a corresponding groove. The elastic encapsulant according to any one of claims 1 to 8, which has a plurality of encapsulating strips that are separate from each other, and each encapsulating strip is formed on the outer peripheral side surface of the strip-shaped member. An elastic encapsulant characterized in that it is fitted into a corresponding groove among a plurality of formed grooves from the outer peripheral side. The elastic encapsulant according to any one of claims 1 to 8, which integrally has a plurality of encapsulating strips arranged in parallel with each other and a connecting portion connecting the encapsulating strips. , An elastic sealing material, wherein each sealing strip is fitted into a corresponding groove among a plurality of grooves formed on the outer peripheral side surface of the strip-shaped member from the outer peripheral side. The width of the opening on the outer peripheral side of the groove is narrower than the groove width inside the groove.
The elastic sealing material according to claim 9 or 10, wherein the natural width of the sealing strip is larger than at least the outer peripheral side opening width of the outer peripheral side opening width and the groove width.

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