JP3769367B2 - Lining method for existing pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strip for a lining pipe and a lining method for an existing pipe, and more specifically, a strip for a lining pipe for rehabilitating an existing pipe such as a sewer pipe, a water pipe, a gas pipe, and the pipe using the same. The present invention relates to a method for lining existing pipes that enables easy installation of communication cable pipes by extremely simple construction.
[0002]
[Prior art]
With the development of cable communications such as cable television, the installation space for communication cables in the built-up area has become a major problem, and it is an underground burial facility. Some proposals have been made to use existing pipes such as gas pipes, and some have been put into practice.
In particular, in a sewer pipe, because of its character, there is a margin space in the upper part of the sewer pipe, or a communication cable pipe is provided in the upper part of the pipe cross section.
[0003]
Conventionally, in order to fix the communication cable pipe on the upper section of the pipe line, preparation work such as attaching a communication cable pipe fixing jig such as a hook to the inner wall surface of the existing pipe line, and installation of the communication cable in the existing pipe wall Therefore, it is necessary to carry out various plumbing works. Furthermore, in order to carry out the above-mentioned piping work while lining the existing inner wall surface of the pipeline and rehabilitating it, a newly formed lining surface is attached to the communication cable piping fixing jig such as the hook. If the hole must be drilled and the water stop treatment of the drilled hole is not fully implemented, the new lining pipe may be damaged by the water pressure that has entered the gap between the existing pipe inner wall and the new lining pipe, There was a risk of water leaking outside the system.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above facts, and an object of the present invention is to provide a belt-like body for a lining pipe that does not require a water stop treatment for a hole for a communication cable pipe fixing tool, and an easy to use the same. Another object of the present invention is to provide an existing pipe lining method that enables quick installation of cable pipes for communication.
[0005]
[Means for Solving the Problems]
The invention described in claim 1 has joint portions that are continuous in the longitudinal direction in the vicinity of both side edges of the flat plate-like base material, and includes an inner first wall portion and an outer second wall portion. An existing pipe for lining a spiral lining pipe in an existing pipe by spirally winding a lining pipe strip having a tubular double wall portion formed in the longitudinal direction and joining adjacent joints A lining method, in which two incisions are made in the longitudinal direction in the first wall portion of the portion of the lining pipe strip where the tubular double wall portion is formed, and the first incision is made. The gist of the lining method for an existing pipe is characterized in that the wall portion of the pipe is pulled out inward.
[0006]
The gist of the invention described in claim 2 is that the cable is inserted through the first wall portion drawn inward, and the lining method for an existing pipe according to claim 1 is used.
[0007]
Invention of Claim 3 has a junction part which continued to the longitudinal direction in the vicinity of the both-sides edge of a flat base material, and is from the 1st wall part inside the said base material, and the 2nd wall part outside. An existing pipe for lining a spiral lining pipe in an existing pipe by spirally winding a lining pipe strip having a tubular double wall portion formed in the longitudinal direction and joining adjacent joints A lining method, wherein a cable fixing tool is attached to a first wall portion of a portion where the tubular double wall portion of the lining tube strip is formed in the lining tube. The gist of the lining method.
[0009]
The strip for a lining pipe used in the invention of claim 1 is generally “Super SPR” which has received a technical examination certificate as “rehabilitation technology for sewer pipes” based on the Ministry of Construction Notification No. 1451 dated July 28, 1987. Developed as a rigid vinyl chloride profile used in the “Sewage Pipe Renewal Method” so that communication cable piping can be easily and quickly installed in the lining pipe after the profile is piped and lined. Is.
[0010]
The material constituting the strip for the lining pipe is spirally wound, and the spiral lining pipe formed in the existing pipe by joining the adjoining joint portions is integrated with the existing pipe covering the outer pipe. The lining pipe line to be obtained has the required strength, for example, the required strength of the sewage pipe required by the sewerage facility design guidelines, but the above-described profile is continuously formed by an extrusion method. A thermoplastic resin that can be molded in a specific manner, in particular, a vinyl chloride resin excellent in moldability is preferred. Of course, other thermoplastic resins and metals are not excluded.
[0011]
Hereinafter, description will be given with reference to the drawings.
If the joint part of the both-sides edge of the strip | belt body for lining pipe | tube of invention of Claim 1 is wound spirally and the lining pipe | tube formed in the existing pipe | tube can hold | maintain watertightness in each use Although not particularly limited, for example, as shown in FIG. 1, the engagement rib 12 having the engagement portion 122 on the lower surface of the convex protrusion 121 near one side edge, and the above-mentioned near the other side edge. A socket 13 having a concave groove 132 formed with an undercut portion 131 for receiving the engagement rib 12 is provided continuously in the longitudinal direction so as to be engageable, wound spirally, and as shown in FIG. It may be a strip-like body for a lining pipe that can be joined together to form a lining pipe, and as shown in FIGS. 5 and 6, convex protrusions 123 on both side edges. An engagement ring having a locking portion 124 on the lower surface of 125 and a long groove having a concave groove 134 formed with an undercut portion 133 for tightly receiving the two engaging ribs 125 which are wound spirally and are in contact with each other as shown in FIG. The belt-like body 1 for a lining pipe made of two pieces of the fastener 135 may be used.
[0012]
Moreover, the strip | belt-shaped body 1 for lining pipes of this invention is provided with the tubular double wall part 113 including the 1st wall part 111 inside the base material 11, and the 2nd wall part 112 outside in the longitudinal direction. However, when the first wall 111 is partially missing and spirally wound to form a lining pipe, even if a partial hole opened inside is formed Good.
[0013]
Further, as shown in FIG. 1, the lining tube strip 1 of the present invention has a plurality of ribs 14, 15, 16, and 17 standing on a flat substrate 11 and spirally wound, The lining pipe formed in the existing pipe may be reinforced.
The ribs 14, 15 and 16 (hereinafter referred to as “outer diameter regulating ribs”) are provided on the wall surfaces 14 a, 15 a and 16 a which are orthogonal to the base material 11, and the tops of these wall surfaces 14 a, 15 a and 16 a. Wide stopper portions 14b, 15b and 16b are provided at the same height on a plane parallel to the surface of the base material 11 to reinforce the formed lining pipe and regulate the outer diameter of the lining pipe, It also acts as a spacer for the backfilling agent filled between the existing pipe inner surface and the lining pipe outer surface.
[0014]
The heights of the plurality of outer diameter regulating ribs 14, 15 and 16 may be provided at the same height on the surface of the substrate 11, but may be different heights. When the plurality of outer diameter regulating ribs 14, 15 and 16 are different in height, when the lining pipe is formed by being spirally wound, the highest outer diameter regulating rib has the outer diameter of the lining pipe. It will be regulated.
[0015]
The ribs 17 are oblique ribs that extend outward from the lower side of the socket 13 and are continuously provided in the longitudinal direction, and apply a pressing force toward the adjacent engaging ribs 12. And has the function of reinforcing these engagements.
[0016]
Reference numeral 18 denotes a sealing agent layer that reinforces the water tightness at the engaging portion between the socket 13 and the engaging rib 12. Although not shown, the sealing agent layer 18 may be provided on the engaging portion of the socket 13 and the engaging rib 12 or both.
[0017]
The lining pipe strip 1 further includes a reinforcing member 2 shown in a partially cutaway perspective view in FIG. 3, and is inserted between outer diameter regulating ribs 15 and 16 as shown in FIG. It is also possible to reinforce a lining tube formed by engaging spirally wound adjacent engagement ribs and sockets.
[0018]
The reinforcing material 2 is not particularly limited as long as it can reinforce the lining pipe formed in the existing pipe line, but preferably made of metal, in particular, aluminum, iron or the like. It is preferably made of a metal that is easy to use, and moreover, for an application that requires corrosion resistance, it is more preferably made of a ferrous metal such as stainless steel.
The shape is not particularly limited as long as the shape can be effectively reinforced. For example, a long plate shape such as a U-shaped cross-section, an inverted U-shape, a W-shape, and an inverted W-shape. The body is mentioned.
[0019]
The reinforcing member 2 shown in FIG. 3 is a long plate-like body having a W-shaped cross section, and is inserted between the outer diameter regulating ribs 15 and 16 of the lining pipe strip 1 as shown in FIG. Both side ends of the reinforcing member 2 are engaged with the lower surface orthogonal portions of the columnar portion a and the stopper portion b of the outer diameter regulating ribs 15 and 16, but the sliding at the portions is prevented and the engagement is strengthened. Therefore, sawtooth-shaped cuts 21 and 21 having a height of 1 to 10 mm and a pitch of about 1 to 20 mm are provided continuously in the longitudinal direction.
Reference numeral 22 denotes a through hole provided so that a backfilling agent, which will be described later, also enters the gap between the reinforcing member 2 and the lining pipe strip 1.
[0020]
The lining pipe strip 1 is spirally wound and engages adjacent adjoining engagement ribs and sockets to form a lining pipe along the inner surface of the existing pipe line.
The means for forming the lining pipe is not particularly limited. For example, the lining pipe is formed on the lining work site using a simple pipe-making facility as disclosed in JP-A-55-61434. However, a method for producing a pipe using the lining pipe strip shown in FIGS. 3 and 4 will be described with reference to a process explanatory diagram shown in FIG.
[0021]
Reference numeral 31 denotes a lining pipe strip 1 feeding drum, and the lining pipe strip 1 wound around this is supplied to a pipe making machine 32 installed for construction in a manhole 41 of an existing sewage pipe 40. On the other hand, 33 is a rotating roller for bending the reinforcing material 2, and the reinforcing material 2 is forcibly bent to a diameter smaller than the diameter of the lining pipe lining the existing pipe inner surface before being supplied to the pipe making machine 32. Then, it is bent in a spiral shape and supplied to the pipe making machine 32.
[0022]
The strip 1 for lining pipes is spirally wound by the pipe making machine 32, and a lining pipe having a slightly smaller diameter than the existing sewer pipe is formed by engaging adjacent engaging ribs and sockets. However, the reinforcing member 2 is inserted between the outer diameter regulating ribs 15 and 16 of the lining pipe strip 1 produced by the fitting roller of the pipe making machine 32, and is placed in the direction of the arrow in the existing sewer pipe 40. The lining pipe 20 is manufactured while continuously rotating in a spiral shape.
[0023]
The reason why the reinforcing member 2 is forcibly bent to a diameter smaller than the diameter of the lining pipe is to prevent the diameter expansion by the spring spring pressure due to the bending even if a force for expanding the diameter is applied to the lining pipe. is there.
[0024]
After the lining pipe is formed in the existing pipe line, the backfill material is injected and hardened in the gap between the existing pipe line and the lining pipe.
The backfill material is used for bonding the existing pipe line and the lining pipe and is not particularly limited. For example, the backfill material used in the above-described Super SPR method is Portland cement. This is a special mortar in which lightweight aggregates such as obsidian, swelling agents, surfactants, resin emulsions and the like are blended with the main adhesive material such as obsidian.
[0025]
In the lining tube thus obtained, a tubular double wall portion including a first inner wall portion and an outer second wall portion of the lining tube wall is formed in a spiral shape. For example, fixing of a communication cable pipe or the like by cutting a portion along the tube axis of the lining pipe into the portion that is a double wall portion of the wall and pulling out the first inner wall portion to the inside. A tool is formed.
[0026]
The incision is not particularly limited as long as it is a double wall portion.For example, a pipe such as a communication cable or a member such as a wiring is provided in a direction perpendicular to the tube axis of the lining pipe. Insert a notch with a width that can be supported, pull the notch part while heating it in the direction opposite to the curved direction of the lining tube wall (inner side), and pipe the communication cable between the lining tube wall and the notched part In the same manner, intermittently form a similar space along the tube axis of the lining pipe, and each of the drawn incisions may be used as a fixture, A work cut window may be made, and a separately prepared communication cable pipe fixing tool may be attached in the vicinity of the work cut window.
[0027]
FIG. 10A shows a partial sectional view along the tube axis of the lining pipe in a state where the two notches 8 and 8 are made in the first wall portion 111 which is the double wall portion. It shows with. FIG. 10B shows a state in which the first wall portion 111 between the two notches 8 and 8 in FIG. 10A is pulled out to the inside of the lining pipe in a partial sectional view thereof. A space for fixing the communication cable is formed between the drawn first wall portion 111 and the lining pipe 5.
FIG. 10 (c) shows a state where the communication cable 6 is installed in the space for fixing the communication cable formed in FIG. 10 (b). The communication cable 6 is intermittent in the direction of the pipe axis of the lining pipe 5. An overhead wire is fixed in the lining pipe 5 by a communication cable pipe fixture 51 including a first wall portion 111 between the two notches 8 and 8 provided in the lining pipe 5.
[0028]
FIG. 9 shows a state where the pipe fixing tool 52 for communication cable is attached to the first wall portion 111 which is the double wall portion in the lining method for an existing pipe according to the invention of claim 4. The sectional view cut in the direction perpendicular to the tube axis of the lining pipe is shown, and the communication cable pipe fixture 52 is attached from the inner surface of the first wall part 111 which is the double wall part. Yes.
[0029]
The method for fixing the communication cable pipe fixing tool 52 to the first wall portion 111 is not particularly limited. For example, a hollow structure plug that can be driven and locked by opening the distal end portion is used. An anchor nail may be used to fix the communication cable piping fixture 52 to the first wall 111 from the inside of the lining pipe, and, as described above, a part of the first wall 111. Alternatively, the working window may be cut out and the tip of the communication cable pipe fixing tool 52 inserted from the inside of the lining pipe may be fixed to the outer surface of the first wall 111 using a nut or a screw.
Regardless of which method is used, the anchor nail hole or the like drilled for mounting the communication cable pipe fixing tool 52 has a second wall 112 on the outer side and a double wall. Therefore, the water stop treatment is completely unnecessary, and it is possible to fix the communication cable pipe fixing tool 52 reliably in a very short time.
[0030]
As described above, the strip for a lining pipe of the present invention is compactly wound in a coil shape and can be transported to the lining work site, using a simple pipe making facility, and simply wrapping in a spiral form on the site. Since it can be used as a pipe, there is an advantage that a conveyance cost can be reduced and a lining pipe having an arbitrary diameter can be easily obtained, and a double pipe wall portion of a lining pipe formed in an existing pipe line is cut. An insertion space such as a communication cable pipe can be formed by simply inserting and pulling out the communication cable, and the communication cable pipe can be easily attached.
[0031]
Since the existing pipe lining method of the present invention is for lining an existing pipe line using the lining pipe strip, the double pipe wall can be formed at any time by a simple installation method for communication cable piping and the like. Two incisions are made in the first wall portion inside the inner lining pipe, and the incision portion is quickly and easily cumbersome by just pulling the inside while heating the incision portion. Forms an insertion space for communication cable piping, etc., without requiring work and processes, and this part is used as a fixture for communication cable piping, and these piping and wiring members are attached along the lining pipe. It can be done.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, examples of the present invention will be described with reference to the drawings, but the present invention is not limited to these examples.
[0033]
Example 1
Fig. 1 shows a strip of a rigid vinyl chloride resin lining pipe according to the present invention (base material thickness 3.4mm, outer diameter regulating rib height 21.5mm, length between engagement rib and socket 79mm) , Sealing agent: vinyl chloride based elastomer) 1 is supplied from the feeding drum 31 and is piped by a pipe making machine 32 temporarily installed for construction in the manhole 4 shown in FIG. (Inner sewer pipe inner diameter: 1000 mm) A lining pipe 5 having an inner diameter of 900 mm is formed in 40, and a backlining material 7 is injected between the inner surface of the existing sewer pipe 40 and the outer surface of the lining pipe 5 (in this case, a reinforcing material) 2 is not used.).
[0034]
Thus, the lining pipe 5 is formed in the existing sewer pipe line 40. The lining pipe 5 is formed in the vicinity of the central portion of the lining pipe strip 1 constituting the inner lining pipe 1 and the outer side of the lining pipe. Since it becomes the double wall part 113 which consists of the 2nd wall part 112, as shown in FIG. 8, in this part, the length of the circumference direction 75mm right and left 75mm in total 150mm (cutting angle: 60 degrees) ) Two incisions are made at intervals of 150 mm in the tube axis direction, the tube wall between the incisions is pulled inward while heating with a torch lamp, and similarly, at intervals of 790 mm linearly in the tube axis direction of the lining tube 5 Then, a communication cable pipe 6 fixture 51 was formed, and a communication cable pipe 6 having an outer diameter of 150 mmφ was inserted and connected between the inner surface of the lining pipe and the fixture.
[0035]
(Example 2)
Similarly, the lining pipe 5 having an inner diameter of 600 mm is formed in the existing sewage pipe line (sewer pipe inner diameter: 700 mm) 40 in the rigid vinyl chloride resin lining pipe strip 1 of the first embodiment, and the lining pipe wall is cut. The communication cable piping is the same as in Example 1 except that the circumferential length is 50 mm in total from the top to 100 mm (cutting angle: 60 °), and the communication cable piping 6 having an outer diameter of 100 mmφ is inserted and connected. Attached.
[0036]
Example 3
4 is a strip for a rigid vinyl chloride resin lining pipe according to the present invention (base material thickness: 3.4 mm, outer diameter regulating rib height: 21.5 mm, length between engagement rib and socket: 79 mm) , W-type steel reinforcing material 2: center upper bent portion height 17.2 mm, distance between both side lower bent portions 14.0 mm, steel thickness 1.2 mm, sealing agent: using vinyl chloride elastomer) 1 A lining pipe 5 having an inner diameter of 1800 mm is formed in an existing sewer pipe line (sewer pipe inner diameter: 2000 mm) 40, and the lining of the lining pipe wall is cut from the top to the left and right in the circumferential direction by a total of 300 mm (cut angle: 60 °), and a communication cable pipe was attached in the same manner as in Example 1 except that the communication cable pipe 6 having an outer diameter of 200 mmφ was inserted and connected.
[0037]
(Example 4)
The cutting of the lining pipe wall of Example 3 was made to be 225 mm (cutting angle: 45 °) with a total length of 112.5 mm in the circumferential direction from the top, and a communication cable pipe 6 with an outer diameter of 100 mmφ was inserted and connected In the same manner as in Example 3, communication cable piping was attached.
[0038]
(Example 5)
Two holes are made in a portion corresponding to the notched portion of the lining tube wall of the third embodiment, and both end portions of the communication cable pipe fixing member 52 as shown in FIG. As an anchor nail, it is inserted into the two holes in the first wall and fixed to the outer wall of the first wall, and the communication cable pipe 6 is inserted and connected to the communication cable pipe fixing fixture 52. Communication cable piping was attached.
[0039]
(Comparative Example 1)
A lining pipe 50 is formed in the existing sewer pipe 40 in the same manner as in Example 1 except that the double wall portion is not provided in the strip 1 for the hard vinyl chloride resin lining pipe of the first embodiment. After injecting the backfill material 7 between the inner surface of the sewer pipe 40 and the outer surface of the lining pipe 50, the communication cable is connected to the pipe wall at the same position as the communication cable pipe 6 fixture 51 of the first embodiment as shown in FIG. The pipe 6 fixing tool 52 mounting holes 53 and 53 are drilled and the communication cable pipe 6 fixing tool 52 is mounted at the same interval as in the first embodiment, and then the gap between the perforated parts 53 and 53 is sealed with a silicone caulking agent. In the same manner as in Example 1, communication cable piping was attached.
[0040]
(Comparative Example 2)
A lining pipe 50 is formed in the existing sewer pipe 40 in the same manner as in Example 3 except that the double wall portion is not provided in the strip 1 for the hard vinyl chloride resin lining pipe of the third embodiment. After injecting the backfill material 7 between the inner surface of the sewer pipe 40 and the outer surface of the lining pipe 50, the communication cable is connected to the pipe wall at the same position as the communication cable pipe 6 fixture 51 of the first embodiment as shown in FIG. Piping 6 fixing tool 52 mounting holes 53 and 53 were bored, and the communication cable piping 6 fixing tool 52 was mounted at the same interval as in Example 1, and communication cable piping was attached in the same manner as in Example 1.
[0041]
In each of Examples 1 to 4, communication cable piping can be attached very easily and in a short time, and the lining tube wall is sufficiently watertight even when the backfilling agent is injected. In addition to the fact that the agent could not be leaked into the lining pipe at all and a safe communication cable pipe could be installed, both of the comparative examples 1 and 2 were installation work for the communication cable pipe fixing itself. Since the backfilling agent penetrates into the lining pipe, all of the communication cable pipe fixing fixture mounting holes were subjected to water-stopping treatment with a water-stopping agent, which required a lot of man-hours.
[0042]
【The invention's effect】
Since the strip for a lining pipe of the present invention is configured as described above, it can be compactly wound in a coil shape and transported to the lining work site, using a simple pipe-making facility, and spirally on-site. Since it can be made into a lining pipe simply by winding, there is an advantage that the conveyance cost can be reduced and a lining pipe having an arbitrary diameter can be easily obtained, and a double pipe wall portion of the lining pipe is cut and pulled out. It is possible to form an insertion space such as a communication cable pipe, and to easily attach the communication cable pipe.
[0043]
In addition, the existing pipe lining method of the present invention linings the existing pipe line using the above-mentioned lining pipe strip, so that the double pipe wall is always formed when a communication cable or the like is attached. By making extremely simple means such as making two cuts in the lining pipe wall part and pulling the cut part inward while heating, it is quick and without the need for cumbersome operations and processes such as water stop treatment. Therefore, it is possible to form an insertion space such as a communication cable pipe and attach a communication cable pipe or the like.
[0044]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a strip for a lining pipe according to the present invention.
FIG. 2 shows the engagement state of the adjacent adjoining engaging rib and socket in the lining tube formed by spirally winding and engaging the lining tube strip of the present invention shown in FIG. 1; It is a partially cutaway sectional view.
FIG. 3 is a partially cutaway perspective view showing a reinforcing plate used in another example of a strip for a lining pipe according to the present invention.
4 is a cross-sectional view showing another example of a strip for a lining pipe according to the present invention using the reinforcing plate shown in FIG. 3;
FIG. 5 is a partially cutaway sectional view showing another example of a strip for a lining pipe according to the present invention.
6 shows the engagement state of the adjacent adjoining engagement rib and socket in the lining tube formed by spirally winding and engaging the lining tube strip of the present invention shown in FIG. 5; It is a partially cutaway sectional view.
FIG. 7 is an explanatory view schematically showing a lining pipe manufacturing (lining) step in a method for attaching a communication cable pipe using the lining pipe strip of the present invention.
8 is a diagram showing a state in which a communication cable pipe fixture is formed on the lining pipe formed in the existing pipe line shown in FIG. It is explanatory drawing which shows an example.
9 is a diagram showing a state in which a communication cable pipe fixing tool is formed on the lining pipe formed in the existing pipe line shown in FIG. It is explanatory drawing which shows another example.
10 shows a process of forming a communication cable pipe fixing tool on a lining pipe formed in an existing pipe line shown in FIG. 8 in the method for attaching a communication cable pipe using the lining pipe strip of the present invention. , (A): shows a part of the cross section including the center line of the lining pipe in a state where the cut is made in the first wall portion, (b): the first in which two cuts are made in the above (a) (C): The communication cable 6 is installed in the space for fixing the communication cable formed in (b) above. It is explanatory drawing which shows the state which was the same cross section as said (a).
FIG. 11 is a diagram illustrating an example of a state in which a communication cable pipe fixing tool is formed on a lining pipe formed in an existing pipe line in the existing pipe lining method using the lining pipe band-like body shown in the comparative example. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lined pipe | tube body 11 Base material 111 1st wall part 112 2nd wall part 113 Double wall part 12, 125 Engagement rib 121, 123 Convex protrusion 122, 124 Locking part 13 Socket 131, 133 Undercut Portions 132, 134 Concave groove 135 Fasteners 14, 15, 16 Outer diameter regulating rib a (14, 15, 16) Supporting column portion b (14, 15, 16) Head 18 Diagonal rib 19 Adhesive layer 2 Reinforcement material 21 Serrated anti-skid part 22 Through-hole 31 Feeding drum 32 Pipe making machine 33 Rotating roller 34 Fitting roller 4 Manhole 40 Existing sewer pipes 5 and 50 Lining pipes 51 and 52 Piping fixture 53 for communication cable 53 Piping fixture fixing Hole 6 Piping for communication cable 7 Backfill material 8 Cutting

Claims (3)

  A tubular double-wall portion having a joint portion continuous in the longitudinal direction in the vicinity of both side edges of a flat substrate and comprising a first wall portion on the inside of the substrate and a second wall portion on the outside. A lining method for lining an existing pipe for lining a spiral lining pipe in an existing pipe by spirally winding a strip for a lining pipe provided in a longitudinal direction, joining adjacent joints to each other, and Two cuts are made in the longitudinal direction in the first wall portion of the portion where the tubular double wall portion of the strip for the lining tube is formed, and the first wall portion in which the cut is made is pulled out inward. A method for lining existing pipes.   The lining method for an existing pipe according to claim 1, wherein a cable is inserted through the first wall portion drawn out to the inside.   A tubular double-wall portion having a joint portion continuous in the longitudinal direction in the vicinity of both side edges of a flat substrate and comprising a first wall portion on the inside of the substrate and a second wall portion on the outside. A lining method for lining an existing pipe for lining a spiral lining pipe in an existing pipe by spirally winding a strip for a lining pipe provided in a longitudinal direction, joining adjacent joints to each other, and A lining method for an existing pipe, wherein a cable fixing tool is attached to a first wall portion of a portion where a tubular double wall portion of a strip for a lining pipe is formed.

Images