JP2001113600A - Method for lining pipe line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for lining a pipe line which can line a deformed pipe of a large diameter exactly without generating wrinkles. etc. SOLUTION: A molded panel 1 made of a fiber reinforced resin which is molded in the shape corresponding to the that of the lower part of the pipe line is placed in the lower part of the pipe line, a sheet-shaped flexible uncured lining material 2 impregnated with a thermosetting resin is arranged in the upper part of the pipe line and cured after being adhered to the pipe. The lining material 2 and the panel 1 are laid to overlap each other in their circumferential end parts. In this way, since angular corner parts existing in the lower part of a special pipe such as a horseshoe-shaped pipe and a rectangular pipe are covered with the panel 1, no wrinkle is generated in the lining material 2 to prevent the deterioration of the downflow property of the lining material. Since the lining material 2 is divided circumferentially into at least two sections, the increase in the size and weight of each lining material can be controlled, enabling the introduction of the lining material from a manhole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lining a deformed pipeline having a non-circular cross section, such as a sewer pipe, and more particularly to a large-diameter deformed pipe having a diameter of 800 mm or more that can be operated by a person in the pipeline. The present invention relates to a lining method suitable for road construction.

[0002]

2. Description of the Related Art Conventionally, as a method of repairing existing pipelines such as sewer pipes and underground pipes, an uncured flexible cylindrical or sheet-like lining material impregnated with a thermosetting resin is conventionally used. Is installed in the pipeline, and by expanding the tubing and the like inserted inside the lining material, the lining material is expanded and brought into close contact with the inner peripheral surface of the pipeline, and then the thermosetting resin is cured. Forming a new pipe in the existing pipeline,
A so-called soft lining method, which is a so-called soft lining method, is mainly employed.

[0003]

The above-mentioned soft lining method is not applied to a large-diameter pipeline for the following reasons. First, the diameter of the lining material increases in accordance with the diameter of the pipeline, and it is difficult to insert the lining material into the pipeline via a manhole (600 mm in diameter). Second, the large dimensions make it impossible to carry on to the site unless a large truck is used, making implementation on narrow roads difficult. For this reason, in the soft lining method, up to a diameter of about 1000 mm is a practically applicable pipe diameter.

By the way, many large-diameter pipes have a shape other than a circular pipe which is currently the mainstream. For example, in large cities such as Tokyo and Osaka, sewer pipes have been buried for a long time since prewar days, and the shape of the sewer pipes is often irregular, such as a horseshoe-shaped or rectangular tunnel. As a characteristic of such an irregularly shaped conduit, the lower portion of the tube is flat, and the corners at both ends of the flat portion have a shape close to a right angle. Even if a soft lining method is applied to such a pipeline and a flexible lining material is expanded in the pipeline, the lining material must have a certain thickness or more to be applied to a large-diameter pipe, and even if the resin is in an uncured state. Due to the high rigidity, the internal corners do not well follow the corners depending on the internal pressure, and often have wrinkles or gaps with the inner surface of the pipe. However, it is difficult to apply the soft lining method.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for lining a large-diameter deformed pipeline, which is capable of accurately lining the pipeline without causing wrinkles or gaps.

[0006]

In order to achieve the above object, a method of lining a pipeline according to the present invention covers an inner peripheral surface of a pipeline consisting of an existing pipe having a deformed cross-sectional shape. In the method, a molded panel made of a fiber-reinforced resin molded in a shape corresponding to the shape of the lower portion of the pipeline is installed at a lower portion of the pipeline, while an upper portion of the pipeline is impregnated with a thermosetting resin. By placing and curing the uncured flexible sheet-like lining material and bringing it into close contact, the sheet-like lining material and the molded panel are lined so as to overlap each other at both ends in the circumferential direction. It is characterized (claim 1).

In the present invention, a method is used in which the molded panel is divided into a plurality of pieces in the cylinder length direction and / or the circumferential direction, and these are assembled in a pipe and arranged along the lower surface of the pipe. (Claim 2).

Further, in the present invention, it is possible to adopt a method of injecting a backfill material into a gap formed between the molded panel and the lower surface of the pipeline (claim 3).

Further, in the present invention, the rib material is integrated in advance on the surface of the molded panel facing the lower surface of the conduit, so that a gap is formed between the molded panel installed at the lower part of the conduit and the lower surface of the conduit. May be formed, and a backfill material may be injected into the gap (claim 4).

Further, in the present invention, after a plurality of rib members are installed in advance in the lower part of the pipeline, a forming panel is installed on the rib members, and the rib members and the forming panel are integrated to form a rib member. The backfill material may be injected into the gap between the lower surface of the pipeline and the molded panel caused by the above (claim 5).

When the invention according to claim 4 or 5 is adopted, a tightening member is made to penetrate the rib material in claim 4 or 5 in the lengthwise direction of the pipeline, and a plurality of rib materials are piped by the tightening member. It is possible to adopt a method in which the rib members or the respective molded panels integrated with the respective rib members are connected to each other in the lengthwise direction of the path cylinder, and each molded panel integrated with each rib material is sequentially drawn into the conduit and installed. ).

In the case of adopting the invention according to the fourth, fifth or sixth aspect of the present invention, each of the molding members is tightened by tightening a tightening member penetrating through each rib material during or after installation of the forming panel. A method in which the panels are integrated in the pipe cylinder length direction can be adopted (claim 7).

The present invention solves the problems of the soft lining method, which are difficult to apply to a large-diameter pipe and difficult to adhere a liner to the inner surface of a deformed pipe, particularly to a corner of the deformed pipe. is there.

That is, by dividing the lining material into two parts in the circumferential direction corresponding to the upper part and the lower part of the pipeline, even when lining a large-diameter pipe, it is possible to avoid an increase in size and weight of the lining material, and through a manhole. Can be drawn into the pipeline, and it is not necessary to use a large-sized vehicle for bringing the vehicle into the site.

In addition, in the deformed pipe, a liner made of a fiber-reinforced resin molded panel formed in advance in accordance with the shape is installed at a lower part of the pipe where corners are present. No wrinkles are formed on the inner surface. Here, in the case of a tube having a rectangular cross section (box culvert tube), there is also a corner at the upper part of the pipe, and in the present invention, the upper part of the pipe is a flexible sheet-like lining material equivalent to the conventional soft lining method. Due to the expansion and hardening of the pipe, some wrinkles will occur at the upper corners of the pipe, but the sewage and rainwater flowing in the pipe are usually up to about 2/3 the height of the pipe. This is a flow rate, and there is no particular problem with regard to wrinkles generated near a corner at the upper part of the pipeline. When a gap is formed between the upper corner of the rectangular tube and the inner surface of the tube, it is preferable to perform backfilling with mortar or the like.

As for the molded panel installed at the lower part of the pipeline, as described in the second aspect of the present invention, the molded panel divided in the tube length direction or the circumferential direction is used to be assembled in the pipeline. For example, the present invention can be widely applied regardless of the diameter of the pipeline to be repaired.

Further, when a method of injecting a backfill material between the molded panel installed at the lower part of the pipeline and the lower surface of the pipeline is adopted as in the invention according to claim 3, corrosion of the inner surface of the existing pipe can be prevented. However, the molded panel and the inner surface of the pipe can be integrated, and the performance such as strength and watertightness can be improved.

The invention according to claims 4 and 5 is an effective method when unevenness is generated due to a step or a bend on the lower surface of the pipeline. (4) Alternatively, after a rib material is previously installed on the lower surface of the pipeline, a molded panel is installed thereon and integrated (claim 5), and the rib material interposes between the lower surface of the pipeline and the molded panel. By intentionally injecting the backfill material into the gap provided on the entire surface, the unevenness of the pipeline can be corrected to some extent linearly, and at the same time, the molded panel can be integrated with the lower surface of the pipeline .

Here, when the rib material is integrated with the molded panel in advance as in the invention according to claim 4, there is an advantage that work in a pipeline with a bad working environment can be reduced. In the method according to the fifth aspect of the present invention, in which the rib member is disposed on the lower surface of the conduit and then the molded panel is disposed and integrated, there is an advantage that it is possible to cope with a complicated conduit inner surface shape. . In this case, it does not prevent the joint use of the repair work on the lower surface of the pipeline (e.g., the work of cutting a step or the leveling of a fall portion) when the rib material is installed.

In the case where the above-mentioned rib members are used, the respective rib members are integrated by a tightening member such as a wire or a shaft extending in the lengthwise direction of the conduit tube as in the invention according to claim 6. Thereby, the work of installing the rib material or the molded panel integrated therewith in the pipe can be facilitated.

Further, as in the invention according to claim 7, the tightening members connecting the respective rib members in the lengthwise direction of the pipe tube are tightened during the installation of the molded panel or after the installation is completed, so as to be integrated with the rib members. When the formed molded panels are integrated in the pipeline cylinder length direction, a lining material firmly fixed in the pipeline cylinder length direction can be constructed.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are schematic cross-sectional views showing the structure of a pipeline lined by applying the method of the present invention, and are cutaway along a plane orthogonal to the cylinder length direction of the pipeline. In each of these examples, the present invention is applied to an existing pipe P having a horseshoe-shaped cross section, and in each case, the lower half of the existing pipe P is previously formed into the shape of the lower half of the existing pipe P. The upper half is covered with a sheet-like lining material 2 while being covered with a molded panel 1 formed along the same, and the sheet-like lining material 2 is in an uncured state impregnated with a thermosetting resin. In the above, it is drawn into the existing pipe P, brought into close contact with the upper half thereof, and then cured.

The formed panel 1 and the sheet-like lining material 2 overlap each other over a predetermined length at both ends in the circumferential direction. The form of the overlap portion L of the formed panel 1 and the sheet-like lining material 2 is not only a simple overlap as shown in FIG. 1, but also as shown in FIG. A step 1a is formed on the surface of the sheet, and both ends of the sheet-like lining material 2 are accommodated in the step 1a. Alternatively, as shown in FIG. Corners C of the lower surface of the existing pipe P of horseshoe shape
A structure or the like reaching P can be employed.

In the case where the corrosion of the existing pipe P progresses and the molded panel 1 cannot be properly arranged along the lower half thereof, as shown in FIG. It is desirable to adopt a structure in which the rib material 3 is arranged between the rib material 3 and the half surface, and a backfill material is injected into a gap created thereby.

The molded panel 1 in each of the above examples is obtained by assembling and integrally integrating an existing pipe P, which is appropriately divided in the tube length direction and the circumferential direction. The form of the division is shown in FIG. Taking an example as an example and showing it in a sectional view taken along line AA, a form in which the existing pipe P is divided only in the tube length direction as schematically shown in FIG. It is possible to adopt a form in which the division is performed in the circumferential direction and the division surfaces in the cylinder length direction are arranged alternately.

When the molded panels 1 are installed, as shown in FIG. 7, an enlarged view taken along the line BB in FIG. 4, and in FIG. 8, an enlarged view of a portion A in FIG. It is preferable to form the stepped portion 1a at each end as described above, and the overlapped portion is treated with a sealing material 4 such as a water-swellable sealant material or an epoxy resin, so that the watertightness is improved. It is desirable to improve chemical resistance. 7 and 8, reference numeral 5 denotes a backfill material.

When the gap between the molded panel 1 and the lower half surface of the existing pipe P is large, it is desirable to provide a rib member 3 as shown in FIG. For example, a C-shaped steel material can be suitably used. Also, it is preferable to form through holes 3a as shown in FIG. 7 at appropriate intervals in the rib material 3 because integration with the backfill material 5 is increased by an anchor effect. The rib member 3 may have a structure in which ribs protrude from a general plastic plate.

The rib material 3 may be integrated with the molded panel 1 in a factory or the like in advance, or the rib material 3 is installed on the lower half surface of the existing pipe P, and then the molded panel 1 is installed and integrated. It may be. Normally, it is preferable for the work to integrate the rib material 3 into the molded panel 1 in advance, but
When the inner surface of the pipeline is severely corroded, or when it is meandering or bent, it may be more efficient to proceed with the work at the site.Therefore, investigate the pipeline conditions in advance and decide which method to use. May be appropriately selected.

As a method of integrating the rib member 3 and the molded panel 1, a method of fixing with a bolt 6 and a nut 7 as shown in FIG. 8 (the nut 7 may not be used) or a method of bonding , Or may be structurally fitted to each other.

When the rib member 3 is used, as shown in FIG. 5, a tightening member 8 such as a wire is passed through the rib member 3 in every several through holes 3a in the longitudinal direction of the pipe tube, and each rib is formed. The material 3 and the molded panel 1 integrated therewith can be connected in the cylinder length direction. A shaft may be used as the tightening member 8 in addition to the wire. When the existing pipe P has a step or a bend, it is preferable to use a flexible wire. Further, it is also possible to use a wire as the tightening member that passes through the entire length of the repair target pipeline and a shaft as the tightening member that passes to combine several formed panels 1. Further, since this tightening member serves to tighten each rib member 3 and each formed panel 1 integrated therewith in the lengthwise direction of the pipe, at least one or several tightening members are required. It is preferable that the length be equal to the entire length of the repair target pipeline.

Incidentally, in the example shown in FIG.
After being installed on the existing pipe P, the molded panel 1 is installed and integrated, but in this case, the respective rib members 3 may be connected by a tightening member that penetrates in the pipe tube length direction.

In each of the above working examples, the molded panel 1 is a molded body of fiber reinforced resin, and its structure is a sheet of polyester fiber or polyolefin fiber as shown in FIG. A sheet-shaped woven fabric 12 such as a glass roving cloth is disposed on both the front and back surfaces of a nonwoven fabric 11, and the entire structure is impregnated with a thermosetting resin such as an unsaturated polyester resin and cured in a mold. Etc. can be adopted.

As the sheet-like lining material 2, a structure similar to that of the molded panel 1 can be adopted, and the sheet-like nonwoven fabric having a sheet-like woven fabric such as a glass roving cloth disposed on both front and back surfaces thereof is unsaturated. A thermosetting resin such as polyester resin is impregnated, the resin is drawn into the existing pipe P in an uncured and flexible state, and is expanded using an expansion tube or the like as described later to adhere to the upper half of the existing pipe P. And heat-cured in that state.

Next, an example of a concrete construction procedure of the method of the present invention for obtaining the structure of each construction example described above will be described.
10 to 12 are explanatory diagrams of the procedure, and each show a schematic cross-sectional view along the cylinder length direction of the pipeline.

First, as shown in FIG. 10, assuming that a pipe between the manholes B and C is a line to be repaired, weirs 101 and 102 are constructed adjacent to manholes A and D on the upstream side and the downstream side, respectively. The sewage blocked by the weir 101 is discharged to the downstream side of the weir 102 by a pump 103 and a drain hose 104 provided on the ground, thereby performing water replacement. As a result, the space between the manholes B and C, which are the repair target pipelines, is in a dry state.

In this state, the formed panel 1 which has been formed in advance along the lower half of the existing pipe P from the manhole B into the pipe to be repaired is sequentially drawn in, and covers the lower half of the existing pipe P. Is installed while assembling each molded panel 1 as described above. This state is shown in FIG. At this time, if a gap is formed between the formed panel 1 and the lower half surface of the existing pipe P due to corrosion of the existing pipe P or the like, after installation of the formed panel 1,
As described above, it is preferable to inject a backfill material such as mortar into the gap to fill the gap. Further, when the gap between the lower half surface of the existing pipe P and the molded panel 1 is large, the rib member 3 is interposed therein as described above. In order to prevent the molded panel 1 from being lifted up by buoyancy at the time of backfilling, a support is assembled in the existing pipe P, or an anchor is driven from above the molded panel 1 into the ground.

When the rib members 3 are interposed, the rib members 3 are integrated with the molded panel 1 in advance, and when the tightening member 8 is penetrated through each rib member 3, each of the molded panels 1 Are integrally connected in the pipe tube length direction by the tightening member 8, in which case,
A take-up machine (not shown) can be arranged in the manhole C, and each formed panel 1 can be sequentially drawn into the pipe via the tightening member 8. Further, when the tightening member 8 extends over the entire length of the pipeline, by tightening both ends of the tightening member 8 after drawing in, the molded panels 1 can be more reliably integrated in the cylinder length direction.

After the installation of the molded panel 1, a backfill material is injected into a gap formed entirely between the lower half surface of the existing pipe P and the molded panel 1 due to the presence of the rib material 3, and the gap is removed. Filling and integrating the molded panel with the lower half surface of the existing pipe P. In the example of FIGS. 5 and 6, each rib material 3 extends along the circumferential direction.
After the installation, the molded panels 1 at both ends of the repair target pipeline
When the backing material is injected from both ends in the circumferential direction of the molded panel 1 by covering the gap formed between the lower surface of the existing pipe P and the lower half surface of the existing pipe P, the backing material is formed along the rib material 3. Injection is possible, and efficient injection is preferable.

Here, the rib material 3 may be formed along the length of the pipe cylinder. In this case, the gap is covered at both ends in the circumferential direction of the molded panel 1, and the ribs 3 are formed from both ends of the molded panel in the cylinder length direction. It is preferable to inject the backfill material because the backfill material can be injected along the rib material 3 as described above.

When the installation of the molded panel 1 is completed as described above, the lining operation using the sheet-like lining material 2 is performed. In this work, the uncured flexible sheet-like lining material 2 having a width dimension enough to overlap with both circumferential end portions of the molded panel 1 in which the installation has been completed is impregnated with the thermosetting resin, and the uncured soft lining material 2 is removed from the manhole B. Pull into the repair target pipeline. As shown in FIG. 12, the terminal fittings 106a and 106b are attached to both ends of the extension tube 105 which has been drawn in at the same time as the sheet-like lining material 2 is drawn in, or which has been previously drawn into the pipe to be repaired.
Is attached, and air is press-fitted from a fluid pressure inlet provided in any one of the fittings to expand the expansion tube 105 and expand the sheet-like lining material 2. The existing pipe P
To the upper half surface. Then, the expansion tube 10
A heating fluid such as steam or hot water is press-fitted into 5 to cure the thermosetting resin. By the above operation, a pipe having the structure shown in FIGS. 1 to 4 is obtained.

In the example of the procedure described above, the example in which the molded panel 1 is installed first, and then the sheet-like lining material 2 is installed, but in the present invention, the order of the installation may be reversed. .

In each of the above construction examples, an example in which the present invention is applied to an existing horseshoe-shaped pipe has been described. However, the present invention is not limited to this example. It can also be applied to a pipe or a rectangular pipe (box culvert pipe) as shown in FIG. 14. In these cases, the lower half of the pipe is formed into a molded panel 1 and the upper half is formed into a sheet. Each is covered with a lining material 2,
The formed panel 1 and the sheet-like lining material 2 overlap each other at the overlapping portion L at both ends in the circumferential direction. When constructing each of these pipes, the procedure may be the same as in the above-described example.

Further, in the present invention, the structures of the molded panel 1 and the sheet-like lining material 2 are not limited to those described above, but may be any as long as required strength and good workability can be obtained. Any structure can be used.

[0044]

According to the present invention, the lower half of the inner peripheral surface of a deformed pipe such as a horseshoe-shaped pipe is already formed into a shape substantially conforming to the shape of the lower half. Since the upper half is covered with a molded panel, and the upper half is impregnated with an uncured resin and the flexible sheet-like lining material is brought into close contact with it, and then the resin is cured and covered, even if it is a large-diameter deformed pipe, Compared to the conventional case of using an integral lining material in the circumferential direction, it is possible to suppress an increase in the size and weight of each lining material, and it is possible to carry in from a manhole, It is possible to carry on to the site without using a large car, and at the same time, even if there is a corner like a horseshoe pipe or a rectangular pipe in the lower half of the pipe that determines the flow capacity of the pipe, The lower half is covered by the molded panel and has no wrinkles.

Further, by adopting the invention according to claim 2 in which the formed panel is appropriately divided in the circumferential direction and / or the tube length direction and assembled in the pipeline, the present invention can be widely applied regardless of the diameter of the pipeline. It can be applied.

In addition, when the backfill material is injected into the gap formed between the molded panel and the lower half surface of the pipeline, the pipeline and the molded panel are surely integrated. And improve strength and water tightness.

Further, an overall gap is intentionally formed by interposing a rib material between the molded panel and the lower half surface of the pipeline,
By adopting the invention according to claim 4 or 5, in which the backfill material is injected into the gap, the irregularity of the pipeline can be corrected to some extent linearly and the pipeline and the molded panel can be integrated. In this case, according to the invention according to claim 4 in which the rib material is integrated with the molded panel in advance, it is possible to reduce the work in the pipeline with a poor working environment, and to place the rib material in the pipeline. According to the invention according to claim 5 in which the molded panel is installed and integrated after installation, it is easy to cope with a complicated pipe surface shape.

According to the sixth aspect of the present invention, the rib member is connected in the cylinder length direction by the tightening member, and the rib member and the formed panel integrated therewith are inserted into the pipe through the tightening member. It can be retracted, and the installation work becomes easy.

When the rib members and the molded panel integrated therewith are clamped in the lengthwise direction of the pipeline by the tightening members, the molded panels are integrated over the entire length of the pipeline to form a strong lining material.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a structural example of a pipe lined by applying the method of the present invention.

FIG. 2 is a schematic cross-sectional view showing another structural example of a pipe lined by applying the method of the present invention.

FIG. 3 is a schematic cross-sectional view showing still another structural example of a pipe lined by applying the method of the present invention.

FIG. 4 is a schematic cross-sectional view showing still another structural example of a pipe lined by applying the method of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is an explanatory diagram of another structural example cut along the AA plane in FIG. 4;

FIG. 7 is an enlarged view of a portion B in FIG. 4;

FIG. 8 is an enlarged view of a portion A in FIG. 5;

FIG. 9 is a schematic cross-sectional view showing a structural example of a molded panel 1 used in each construction example to which the present invention is applied.

FIG. 10 is an explanatory view of an example of a concrete construction procedure of the method of the present invention, and is a schematic cross-sectional view along a pipe cylinder length direction showing a state where a pipe to be repaired is being refilled.

FIG. 11 is an explanatory view of an example of a concrete construction procedure of the method of the present invention, and is a schematic cross-sectional view showing a state in which a formed panel 1 is installed in an existing pipe P, along a pipe cylinder length direction.

FIG. 12 is an explanatory view of an example of a concrete construction procedure of the method of the present invention, in which a sheet-like lining material 2 is installed in an existing pipe P and is expanded by an expansion tube 15 in a pipe tube longitudinal direction. FIG.

FIG. 13 is a schematic sectional view showing a structural example of an oval tube lined by applying the method of the present invention.

FIG. 14 is a schematic sectional view showing a structural example of a rectangular pipe lined by applying the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forming panel 1a Step part 11 Sheet-like nonwoven fabric 12 Sheet-like woven fabric 2 Sheet-like lining material 3 Rib material 3a Through hole 4 Sealing material 5 Backfilling material 8 Tightening members 101, 102 Weir 103 Pump 104 Drain hose 105 Expansion tube 106a , 106b Terminal fittings P Existing pipes CP Corners L Overlapping parts A, B, C, D Manhole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Futa Makimoto 511-10 Inaya, Kakogawa-cho, Kakogawa-shi, Hyogo (72) Inventor Masashi Katata 1-4-1 Kishibekita, Suita-shi, Osaka (72) Inventor Koji Aso 2-3-21 Matsuyama-cho, Yao-shi, Osaka F-term (reference) 3H025 EA01 EB02 EB25 EC06 ED02 4F211 AA36 AD12 AD16 AD19 AD20 AG03 AH43 SA17 SC03 SD01 SD11 SD23 SH18 SJ01 SJ22 SJ29 SN03 SP13 SP15

Claims (7)

[Claims] 1. A method of coating an inner peripheral surface of a pipe made of an existing pipe having an irregular cross-sectional shape, wherein the pipe is formed into a shape corresponding to a lower shape of the pipe at a lower portion of the pipe. While installing the molded panel made of the fiber reinforced resin, while uncured flexible sheet-like lining material impregnated with thermosetting resin is placed on the upper part of the pipeline and brought into close contact and cured, A method of lining a pipeline, comprising: lining the sheet-like lining material and the molded panel so as to overlap each other at both ends in the circumferential direction. 2. The molding panel according to claim 1, wherein said molding panel is divided into a plurality of sections in a cylinder length direction and / or a circumferential direction, and assembled in a pipeline so as to extend along a lower surface of the pipeline.
A method for lining a pipeline according to the above. 3. The method of lining a pipeline according to claim 1, wherein a backfill material is injected into a gap formed between the molded panel and a lower surface of the pipeline. 4. A gap is formed between the molded panel installed at the lower part of the pipeline and the lower surface of the pipeline by previously integrating a rib material on the surface of the molded panel facing the lower surface of the pipeline, 4. The method according to claim 1, wherein a backfill material is injected into the gap. 5. After a plurality of rib members are set in advance in a lower part of a pipe, the forming panel is set on the rib members, and the rib member and the forming panel are integrated with each other. 4. The method according to claim 1, wherein the backfill material is injected into a gap between the lower surface and the molded panel. 6. A method for lining a pipeline according to claim 4 or 5, wherein a tightening member is made to penetrate the rib material in claim 4 or 5 in the lengthwise direction of the pipeline, and a plurality of the tightening members are used by the tightening member. A rib connecting the ribs in the lengthwise direction of the pipeline, and sequentially pulling and installing the respective ribs or the respective molded panels integrated with the respective ribs via the tightening members in the pipeline; Lining method. 7. The method for lining a pipeline according to claim 4, wherein the tightening member penetrated through each rib member is tightened during or after installation of the molded panel. A method of lining a pipeline, wherein each formed panel is integrated in a lengthwise direction of the pipeline.