JP2006090397A - Existing pipe lining structure and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an existing pipe lining structure using an easy-to-manufacture lining material to be easily formed into a tubular lining material which can stand itself with its dead weight supported at the lower part, and to provide its method. <P>SOLUTION: In the existing pipe lining structure, an inner peripheral face 11a of an existing pipe 11 is covered with the lining material 13. The lining material 13 is formed in a tubular shape in which a thermoplastic resin uneven sheet 15 having flexibility is joined to one face 17a of a base material sheet 17 of a flat thermoplastic resin sheet having flexibility in such a manner that the uneven sheet 15 is located outside. A filler is filled and solidified in a gap 25 between the tubular lining material 13 to be inserted into the existing pipe 11 and the existing pipe 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lining structure for an existing pipe and a lining method for the existing pipe, in which the lining pipe is lined and rehabilitated on the inner peripheral surface of the existing pipe buried in the ground.

  Existing pipes buried in the ground for sewage, etc., are subject to problems such as water leaks from cracks and soil water such as spring water and rainwater flow into existing pipes as they age. Arise. As a technique for repairing such an aging part of an existing pipe, for example, the existing pipe is reinforced by lining the inner surface of a pipe line of the existing pipe with a resin lining pipe.

  For example, in the lining method disclosed in Patent Document 1 below, a lining pipe is formed by an inliner having a T-shaped protrusion on one side, the lining pipe is inserted into an existing pipe, and the protrusion is interposed between the existing pipe and the existing pipe. An annular space is formed. Then, by filling the annular space with liquid mortar, a rigid lining pipe having protrusions embedded in the mortar was formed, and corrosion was prevented by the inner surface of the lining pipe.

  Further, Patent Document 2 below discloses a plastic rib plate that can be used as a lining material for existing pipes. The plastic rib plate has a plurality of at least two open wing elements, which act as anchors. That is, when used as a lining material, a wing element is arranged in an annular space between a plastic flange plate and an existing pipe, and the wing element is embedded in the concrete to be filled and acts as an anchor. Become. This makes it possible to cover the inner surface of an aged existing pipe with a plastic brittle plate having rigidity and corrosion resistance.

Further, the existing pipe lining method disclosed in the following Patent Documents 3, 4, and 5 is a synthetic resin belt body in which the side edges can be engaged with each other in the existing pipe and have a T-shaped projection on one side. Are inserted in a spiral shape while engaging the side edges, and then the spiral tube is expanded in diameter to cover the inner surface of the existing tube. When the spiral tube is inserted over substantially the entire area of the existing tube, the annular space between the spiral tube and the existing tube is filled with concrete, and the spiral tube is fixed to the inner surface of the existing tube. Thereby, the inner surface of the existing pipe was lined by the spiral pipe.
Japanese Patent No. 3444883 Japanese Patent Publication No. 7-94152 Japanese Patent Publication No. 7-25137 Japanese Patent Publication No. 3-48392 Japanese Patent Publication No. 6-88256

However, since the inliner having a T-shaped protrusion disclosed in Patent Document 1 requires a complicated mold for forming the protrusion, it is difficult to obtain good flow characteristics of the material (molded resin), and a wide sheet. Manufacturing as a material becomes difficult. As a result, there is a problem that it is difficult to apply to existing large-diameter pipes.
Moreover, although the lining material disclosed in Patent Document 2 can be manufactured as a wide sheet material, it is structurally difficult to increase the height of the protrusion, and a sufficient ring shape is formed between the existing pipe and the existing pipe. Space could not be secured. In addition, since the strength of the protrusions is small, there is a problem that the filler layer such as mortar becomes thin and the lining structure itself does not become a self-supporting pipe.

  Further, in the lining method disclosed in Patent Documents 3, 4, and 5, the feeding device for feeding the belt-like sheet spirally and the engaging device for engaging the edges of the belt-like sheet must be installed in the manhole. Therefore, in the case of a small-diameter manhole, there arises a problem that the manhole must be cut. In addition to this, as shown by reference numeral 31 in FIG. 4 of Patent Document 3, a groove is formed on the inner peripheral surface of the spiral tube by engaging the side edges of the belt-like sheet, and the sewer after construction. As a cause of clogging of garbage.

  The present invention has been made in view of the above situation, and a lining pipe can be easily created by using a lining material that is easy to manufacture, and can be self-supported by supporting its own weight even at the lower part of the lining pipe, so that a filling gap is ensured. It is an object of the present invention to provide a lining structure for existing pipes and a lining method for existing pipes that can be secured, and to improve the compatibility and reliability of existing pipes with large diameters.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The existing pipe lining structure according to claim 1 of the present invention is an existing pipe lining structure in which the inner peripheral surface 11a of the existing pipe 11 is covered with a lining material 13,
The lining material 13 has a flexible thermoplastic resin concavo-convex sheet 15 bonded to one surface 17a of a flexible flat thermoplastic resin sheet 17 so that the concavo-convex sheet 15 is on the outside. Formed into a tubular shape,
The gap 25 between the tubular lining material 13 inserted into the existing pipe 11 and the existing pipe 11 is filled with a filler and solidified.

  In this existing pipe lining structure, the concavo-convex sheet 15 and the flat sheet 17 are joined, for example, melt-bonded by heating, and joined together to easily form the lining material 19. Are joined together, and the tubular lining material 13 can be easily produced. The lining material 13 inserted into the existing pipe 11 is supported by the lower portion of the existing pipe 11 due to the high compressive strength of the uneven sheet 15, and maintains a distance from the inner peripheral surface 11a of the existing pipe. In between, the filling gap 25 of the filler is reliably ensured.

  The existing pipe lining structure according to claim 2, wherein a thermoplastic resin primary sheet 47 formed in a tubular shape is attached between the existing pipe 11 and the lining material 13, and the filler is the primary sheet. A gap 25 between 47 and the lining material 13 is filled and solidified.

  In this existing pipe lining structure, the primary sheet 47 is positioned between the tubular lining material 13 and the existing pipe 11. The primary sheet 47 is effective when, for example, the existing pipe 11 is significantly damaged, and when there is infiltration of soil water, the primary sheet 47 covers the existing pipe inner peripheral surface 11a. Filling of the filler can be performed smoothly. This is also effective when the branch pipe 41 is connected to the existing pipe 11, and the internal communication opening 45 of the branch pipe 41 can be closed. As a result, the filler filled in the gap 25 is blocked by the primary sheet 47 and is prevented from cracking or flowing out into the branch pipe 41.

  In the lining structure of the existing pipe 11 according to claim 3, the thermoplastic resin concavo-convex sheet 15 is alternately formed on both the front and back surfaces, and the end surfaces of the convex portions 21 on both the front and back surfaces are on the surface spaced apart. It consists of the existing sheet | seat, and the front-end | tip of one convex part is joined to one surface of the said thermoplastic resin sheet, It is characterized by the above-mentioned.

  In this existing pipe lining structure, the convex portions 21 of the thermoplastic resin concavo-convex sheet 15 are spaced apart from each other, and the cross-sectional shape of the convex portions 21 and the concave portions 23 alternately positioned is substantially wavy. That is, the back surface of the convex portion 21 has a shape that becomes the concave portion 23, and the thickness is ensured between the tips of the convex portions 21 on the front and back surfaces.

The lining method for an existing pipe according to claim 4 is a lining method for an existing pipe that covers the inner peripheral surface 11a of the existing pipe 11 with a lining material,
The lining material 13 has a flexible thermoplastic resin concavo-convex sheet 15 bonded to one surface 17a of a flexible flat thermoplastic resin sheet 17 so that the concavo-convex sheet 15 is on the outside. Formed into a tubular shape,
After the lining material 13 is folded and inserted into the existing pipe 11, it is supported in a tubular shape from the inner surface side, and in a state along the existing pipe 11, a gap 25 between the lining material 13 and the existing pipe 11. Further, it is characterized by filling with a filler and solidifying.

  In this existing pipe lining method, it is not necessary to line the lining material spirally on the inner peripheral surface of the existing pipe 11 as in the conventional method, and the lining method can be easily formed and formed into a tubular shape. The lining material 13 is circular in cross section, and no spiral groove is formed by sticking the lining material in a spiral shape. In addition, the gap 25 between the lining material 13 and the existing pipe 11 is reliably ensured by the uneven sheet 15 having a high compressive strength. Note that the lining material 13 is folded when inserted into the existing pipe 11 and is deformed into a substantially U shape, thereby facilitating the insertion. Moreover, you may insert the tubular lining material 13 with the tubular shape.

  The lining method for an existing pipe according to claim 5, wherein the lining material 13 is obtained by previously joining the concavo-convex sheet 15 made of thermoplastic resin to one surface 17 a of the thermoplastic resin sheet 17, and the concavo-convex sheet. The thermoplastic resin sheet 17 is formed into a tubular shape by joining the edges in the longitudinal direction of the thermoplastic resin sheet 17 so that 15 is on the outside.

  In this existing pipe lining method, the edge portions of the sheet-like lining material 19 are bonded together, for example, by heat-melting bonding, so that the lining material 13 can be fixed in a tubular shape and formed. There is no problem such that the lining material 13 expands in the radial direction in the pipe 11.

  The existing pipe lining method according to claim 6, wherein a thermoplastic resin primary sheet 47 formed in a tubular shape is provided between the existing pipe 11 and the lining material 13, and then the lining material 13 is inserted. The filler is filled in the gap between the primary sheet 47 and the lining material 13 and solidified.

  In this existing pipe lining method, the primary sheet 47 is positioned between the lining material 13 and the existing pipe 11, and this primary sheet 47 is effective, for example, when the existing pipe 11 is significantly damaged. When there is infiltration of soil water, the existing inner surface 11a of the pipe is covered with the primary sheet 47, so that the filling of the filler can be performed smoothly and reliably. This is also effective when the branch pipe 41 is connected to the existing pipe 11, and the internal communication opening 45 of the branch pipe 41 can be closed. Thereby, the filler filled in the gap 25 is blocked by the primary sheet 47 and is prevented from flowing out into the branch pipe 41.

  According to the lining structure of the existing pipe according to the first aspect of the present invention, the concavo-convex sheet and the flat sheet are joined together, for example, fusion joining by heating is performed, and the lining material is easily formed. The edges of the lining material are joined to each other so that a tubular lining material can be easily produced. The lining material inserted into the existing pipe is supported by the lower part of the existing pipe due to the high compressive strength of the uneven sheet, and the distance between the inner peripheral surface of the existing pipe is maintained and the space between the existing pipe is filled. The material filling gap can be ensured reliably. As a result, it is possible to lining an existing pipe having a large diameter by using a lining material that is easy to manufacture, and a high peel strength can be obtained and a highly reliable lining structure can be realized.

  According to the lining structure of the existing pipe according to claim 2, the primary sheet is positioned between the tubular lining material and the existing pipe. This primary sheet is effective when, for example, the existing pipe is severely damaged. When there is infiltration of soil water, the primary sheet covers the inner peripheral surface of the existing pipe to fill the filler. Can be performed smoothly. It is also effective when a branch pipe is connected to the existing pipe, and the internal communication opening of this branch pipe can be closed. As a result, the filler filled in the gap is blocked by the primary sheet and is prevented from flowing into the branch pipe. As a result, lining can be made even for an existing pipe having a branch pipe.

  According to the lining structure of the existing pipe according to claim 3, the convex portions of the thermoplastic resin concavo-convex sheet are arranged at intervals from each other, and the cross-sectional shape is substantially wavy with the concave portions alternately located with the convex portions. That is, the back surface of the convex portion is formed into a concave shape, and the thickness is ensured between the tips of the convex portions on the front and back surfaces, that is, the gap between the existing pipe inner peripheral surface and one surface of the thermoplastic resin sheet. It becomes the shape which makes it possible to maintain.

  According to the lining method for an existing pipe according to claim 4, there is no need to line the lining material helically on the inner peripheral surface of the existing pipe as in the conventional method, and an easy lining construction is possible. In addition, the lining material formed in a tubular shape can have a rectangular cross section or a circular cross section, and no spiral groove is formed by sticking the lining material in a spiral shape. Moreover, the clearance gap between a lining material and an existing pipe will be ensured reliably by the uneven | corrugated sheet | seat with high compressive strength. The lining material is folded when inserted into the existing pipe, and can be deformed into a substantially U shape. Therefore, the lining material can be easily inserted.

  According to the lining method for an existing pipe according to claim 5, the edges of the sheet-like lining material are bonded together, for example, by heat melting bonding, so that the lining material is fixed in a tubular shape and molded. This makes it possible to prevent problems such as the lining material expanding radially in the existing pipe.

  According to the lining method of an existing pipe according to claim 6, the primary sheet is located between the lining material and the existing pipe, and this primary sheet is effective when, for example, the existing pipe is significantly damaged. If there is intrusion of soil water, the inner peripheral surface of the existing pipe is covered with this primary sheet, so that the filling of the filler can be performed smoothly and reliably. It is also effective when a branch pipe is connected to the existing pipe, and the internal communication opening of this branch pipe can be closed. As a result, the filler filled in the gap is blocked by the primary sheet, and cracks and outflow into the branch pipe are prevented.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an existing pipe lining structure and an existing pipe lining method according to the present invention will be described in detail with reference to the drawings.
1 is a front view of a lining structure according to the present invention, FIG. 2 is a perspective view of a lining material inserted into an existing pipe, and FIG. 3 is a partially enlarged perspective view of the lining material formed in a tubular shape shown in FIG. is there.
As shown in FIG. 1, a lining material 13 formed in a tubular shape is inserted into the inner peripheral surface 11 a of the existing pipe 11. On the outer peripheral surface of the tubular lining material 13, for example, a plurality of concavo-convex sheets 15 formed in a square shape are joined in an island shape. The concavo-convex sheet 15 is arranged in a fixed pattern in the vicinity or at a predetermined interval. In this Embodiment, as shown in FIG. 2, the uneven | corrugated sheet | seat 15 is arrange | positioned in zigzag form. And these uneven | corrugated sheet | seats 15 are formed in about 10 cm square, for example.

  As shown in FIG. 3, the concavo-convex sheet 15 is bonded to one surface 17a of a base sheet 17 as a flexible flat thermoplastic resin sheet. That is, the tubular lining material 13 is formed by forming a lining material 19 obtained by bonding the concave and convex sheet 15 to one surface 17a of the base sheet 17 into a tubular shape so that the concave and convex sheet 15 is on the outside.

  The concavo-convex sheet 15 is made of a sheet having flexibility and being alternately concavo-convexly formed on both the front and back surfaces of the material 15a made of a thermoplastic resin, and the end surfaces of the convex portions 21 are present on a spaced surface. The convex portion 21 becomes a concave portion 23 opened on the other surface. It is preferable that the convex portions are discrete at a predetermined interval in order to ensure the inflow property of the filler described later. The concavo-convex sheet 15 is joined (welded) by heating and melting the tip of the convex portion 21 to the base material sheet 17. As the concavo-convex sheet 15 and the base sheet 17, for example, a sheet made of olefin resin, polyvinyl chloride, polyethylene, polypropylene, elastomer, or the like can be suitably used.

  The concavo-convex sheet 15 is obtained by introducing a substantially smooth sheet-like material between a pair of molds having a large number of protrusions on the circumferential surface and plastically deforming the same. The continuous forming apparatus (not shown) for the uneven sheet 15 includes a pair of rotating rolls that are forming dies provided with a number of protrusions on the circumferential surface. The tip of one rotating roll is configured so that the tip of the projection of the other rotating roll fits into the virtual cylindrical surface formed by the tip of the one rotating roll without touching the projection of the other rotating roll. Yes. Therefore, by introducing a sheet-like material between the pair of rotating rolls, the uneven sheet 15 having a plurality of irregularities formed on the front and back of the sheet-like material at predetermined intervals is continuously drawn out and easily formed. It has become.

  For joining the uneven sheet 15 and the base sheet 17, a continuous heating and melting joining device (not shown) is used. The continuous heating fusion bonding apparatus has a heating rotation roll in which a large number of rod-shaped heating means (bar-shaped heaters) are projected on the circumferential surface at the same interval as the interval between the recesses 23, and a pressing rotation having a circumferential surface without irregularities. A roll. In order to join the base sheet 17 and the concavo-convex sheet 15, the base sheet 17 is arranged on the holding rotary roll side, the concavo-convex sheet 15 is arranged on the heating rotary roll side, The concave and convex sheet 15 is overlapped and introduced. At this time, the concavo-convex sheet 15 is introduced so that the bar heater matches the concave portion 23. As a result, the tip of the bar heater is sequentially inserted into the recess 23 of the concave and convex sheet 15, and as shown in FIG. 3, the bottom surface of the recess 23 and the base sheet 17 are connected to the bar heater and the pressing rotary roll. Heat pressing is performed, and the tips of all the convex portions are heated and melt bonded to the base sheet 17.

  In the present embodiment, the case where the concave and convex sheet 15 and the base sheet 17 are heated and melt-bonded by a bar heater is described as an example. In addition, the concave and convex sheet 15 and the base sheet 17 are welded by hot air. Alternatively, heat fusion bonding may be performed by ultrasonic welding or high frequency welding.

  The base material sheet 17 in which the uneven sheet 15 is bonded to the one surface 17a is formed on the tubular lining material 13 shown in FIG. 2 by welding the side edges. As shown in FIG. 1, the tubular lining material 13 is supported on the inner peripheral surface 11 a of the existing pipe 11 through the uneven sheet 15 by being inserted into the existing pipe 11. An annular space (hereinafter simply referred to as “gap”) 25 between the tubular lining material 13 inserted into the existing pipe 11 and the existing pipe 11 is filled with a filler such as liquid mortar (not shown) and solidified.

  According to such an existing pipe lining structure, the concavo-convex sheet 15 and the base material sheet 17 can be easily joined to form the lining material 19, and the edges of the lining material 19 can be joined easily to form a tubular lining. The material 13 can be created. Since the filler 25 is filled in the gap 25 between the tubular lining material 13 inserted into the existing pipe 11 and the existing pipe 11, the high compressive strength of the concavo-convex sheet 15 can be used, particularly in the lower part of the existing pipe 11. The self-weight of the tubular lining material 13 is supported by the uneven sheet 15, and the filling gap 25 of the filler can be reliably ensured between the existing pipe 11 and the tubular lining material 13. As a result, the lining material 19 that can be easily manufactured can be used for lining the existing pipe 11 having a large diameter, and the compression strength as a self-standing pipe can be obtained, thereby realizing a highly reliable lining structure. Can do.

Next, an existing pipe lining method using the lining material 19 will be described.
FIG. 4 is an explanatory view showing the production-deformation process of the lining material by (a) to (d), FIG. 5 is an explanatory view showing the insertion state of the tubular lining material, and FIG. 6 is a restoration process of the tubular lining material ( It is explanatory drawing represented by a)-(d).
The lining material 19 formed in a sheet shape is formed into a tubular shape by joining both end edges thereof. As shown in FIG. 4 (a), the lining material 19 obtained by joining the uneven sheet 15 and the base sheet 17 is in a sheet-like state wound around a reel, and the lining construction site It is conveyed and supplied.
At the lining material construction site, while rewinding the lining material 19 wound around the reel, the longitudinal edges of the concavo-convex sheet 15 are continuously connected to each other so that the concavo-convex sheet 15 becomes the outer peripheral surface by a joining device (not shown). Heat melting and joining are performed to form a tube as shown in FIG. In addition, the junction location which will be along an axis line is set so that it may become an upper end (ceiling side) in the tubular state. As shown in FIG. 4 (c), the lining material 13 formed in a tubular shape is deformed into a concave shape and crushed just before being inserted into an existing pipe, and is further abbreviated as shown in FIG. 4 (d). It is inserted into the existing pipe 11 while being formed into a U shape.

For example, as shown in FIG. 5, the existing pipe 11 to be laid is a position where a manhole 31 or the like is provided as a laying start end, and the laying end is also a position where a manhole 33 or the like is provided. . That is, the existing pipe 11 that connects between the manholes 31 and 33 becomes a rehabilitation target.
Insertion of the tubular lining material 13 into the existing pipe 11 is performed by deforming the sheet-shaped lining material 19 in a wound state into a substantially U shape and feeding it out while forming a tubular shape as described above.

  The introduction into the manhole 31 is performed, for example, by pulling a tension belt fixed to the tip of the tubular lining material 13 from the manhole 33 on the laying end side. When such a pulling belt is not used, a self-propelled robot or the like may be taken into the existing pipe 11 and pulled by the self-propelled robot or the like.

In order to lay the existing pipe 11, a lining material 13 slightly longer than the entire length of the existing pipe 11 to be laid is set.
Here, a case where the existing pipe 11 has a relatively small diameter will be described.
After the tubular lining material 13 is laid, compressed air or the like is sent into the interior to restore the tubular lining material 13 that has been deformed into a substantially U shape, and the tubular lining material 13 is compressed so that the tubular state is not crushed. Support with air. That is, the lining material 13 is inserted from the installation start end of the existing pipe 11 to be installed to the installation end, and if the lining material 13 is inserted through the entire length of the existing pipe 11 to be installed, the lining material 13 is installed. It is supported in a state where a predetermined tension is applied between the start end and the laying end. Thereby, the slack etc. of the lining material 13 are removed. If the lining material 13 can be stretched in this way, air is pressure-fed from the base end side of the lining material 13 by the pneumatic feeding portion of the restoring device.

  In addition, it is preferable that the lining material 13 has a structure in which the opening area on the laying end side that is the tip is reduced by a predetermined amount. That is, a clamp member or the like is attached to the tip of the lining material 13 at the laying end to form a small-diameter opening portion, and an escape port for air fed into the lining material 13 is provided. As a result, the pressure in the lining material 13 can be increased, and the pressure from the pneumatic feeding portion supports the lining material 13 from the inner surface side, and the lining material 13 is brought into close contact with the inner peripheral surface of the existing pipe 11. It works efficiently in the direction of the movement.

  When compressed air is supplied to the inside, the tubular lining material 13 is first crushed as shown in FIG. 6 (b) from the state of being deformed into a substantially U shape shown in FIG. 6 (a). 35 is expanded so as to expand radially outward. When air is further pumped from the pneumatic feeding section from this state, as shown in FIG. 6C, the lining material 13 is further restored in the radial direction, and the cross-sectional shape becomes nearly circular. That is, when the internal pressure of the lining material 13 with both ends closed is larger than the external pressure, the circular shape of the cross section of the lining material 13 is restored.

  As shown in FIG. 6D, when the lining material 13 is restored to the substantially original cross-sectional shape, the terminal side of the lining material 13 is squeezed and the compressed air is left. Thereby, the lining material 13 is completely restored to the original shape, and the state is supported, and the uneven sheet 15 disposed on the outer periphery is in close contact with the inner peripheral surface 11 a of the existing pipe 11. .

  When the uneven sheet 15 is in close contact, a gap 25 corresponding to the thickness of the uneven sheet 15 is formed between the tubular lining material 13 and the existing pipe 11. A filler supply hopper (not shown) is connected to the gap 25 opened on one end side of the tubular lining material 13, and the gap 25 is filled with a filler such as liquid mortar supplied from the filler supply hopper. At this time, the lining material 13 is supported without being crushed by the compressed air, although the weight of the filler is added. Thereafter, when a predetermined curing period elapses, the filler is solidified, a predetermined strength is expressed, and the lining of the existing pipe 11 is completed.

  In this existing pipe lining method, there is no need to lining the lining material on the inner peripheral surface of the existing pipe 11 in a spiral manner as in the conventional method, and an easy lining construction is possible and the pipe is already tubular. Since the formed lining material 13 has a circular cross section, no spiral groove is formed by sticking the lining material in a spiral shape. In addition, the gap 25 between the lining material 13 and the existing pipe 11 is reliably ensured by the uneven sheet 15 having a high compressive strength.

  Therefore, according to the above existing pipe lining method, the lining material 13 is formed so that the uneven sheet 15 is on the outside, the lining material 13 is crushed and inserted into the existing pipe 11, and then the internal pressure is applied to the lining material 13. Is restored to a circular cross-section, and the circular cross-section is supported, and the gap 25 between the tubular lining material 13 and the existing pipe 11 is filled and solidified, so that the lining material is provided as in the conventional method. There is no need to spirally attach to the inner wall of the pipe, and lining construction can be facilitated. Moreover, since the gap | interval 25 with the existing pipe 11 is ensured reliably by the uneven | corrugated sheet | seat 15 with high compressive strength, a filler can be filled reliably. Furthermore, since a spiral groove is not formed by sticking the lining material in a spiral shape, a groove that intersects the axis does not appear repeatedly, and a lining structure that hardly causes clogging of dust as a sewer after construction is obtained. Can do. Moreover, since the joining part of the tubular lining material 13 which is a part used as the both-ends edge of the sheet-like lining material 19 is an upper position in the existing pipe 11, it may become the hindrance of the flow in a pipe | tube by this joining trace. Disappear.

  In the above-described example, the lining method when the existing pipe has a relatively small inner diameter has been described. However, when the existing pipe 11 has a relatively large diameter, the tubular lining material 13 is inserted into the existing pipe 11. After laying, the tubular lining material 13 is arranged so as not to be deformed by pressurization during filling of the filler, which is a subsequent process, to support the filling pressure of the filler, The tubular lining material 13 is prevented from being deformed until the filler is solidified.

Next, another embodiment of the existing pipe lining structure and the existing pipe lining method according to the present invention will be described.
FIG. 7 is an explanatory diagram showing the state of lining material insertion into an existing pipe having a branch pipe, FIG. 8 is a front view of a lining structure with a lining material extrapolated from a primary sheet, and FIG. 9 is a diagram showing the primary sheet shown in FIG. FIG. 10 is a longitudinal sectional view of an existing pipe into which a lining material having a primary sheet is inserted. In addition, in the following embodiment and each modification, the same code | symbol is attached | subjected to the member same as the member shown in FIGS. 1-6, and the overlapping description shall be abbreviate | omitted.
In this embodiment, the existing pipe 11 having the branch pipe 41 shown in FIG. 7 can be lined with the lining material 13. That is, a primary sheet 47 that closes the internal communication opening 45 of the branch pipe 41 is attached to the outer periphery of the uneven sheet 15 in the lining material 13 that is inserted into the portion 43 of the existing pipe 11 from which the branch pipe 41 is branched.

  Therefore, when the shape of the lining material 13 on which the primary sheet 47 is extrapolated is restored, the outer periphery of the lining material 13 is covered with the primary sheet 47 as shown in FIG. A gap 25 is formed by the uneven sheet 15 between the primary sheet 47 and the base sheet 17. As shown in FIG. 7, the primary sheet 47 may be extrapolated only to the branch portion 43 of the branch pipe 41, or may be extrapolated over the entire length of the lining material 13.

  In the case of the lining material 13 with the primary sheet 47 extrapolated, the lining material 13 is inserted into the existing pipe 11 with the primary sheet 47 being heated and deformed in a U-shape in the same manner as the method for inserting the lining material 13 described above. . Alternatively, as shown in FIG. 9, the primary sheet 47 may be inserted into the existing pipe 11 before the lining material 13 is inserted, and then the lining material 13 may be inserted in the same manner as described above. Then, by restoring the shape from the folded state of the lining material 13, the primary sheet 47 can be covered and held at a predetermined position of the lining material 13.

  Therefore, according to this embodiment, since the primary sheet 47 that closes the internal communication opening 45 of the branch pipe 41 is attached to the outer periphery of the concavo-convex sheet 15, the shape of the lining material 13 is restored in the existing pipe 11. As shown in FIG. 10, the primary sheet 47 can block the internal communication opening 45 of the branch pipe 41, and can prevent the filler filled in the gap 25 from cracking or flowing out into the branch pipe 41. it can. As a result, the existing pipe 11 having the branch pipe 41 can be lined.

  Further, the primary sheet 47 is continuously disposed over the entire length of the lining material 13, that is, between the manhole 31 at the laying start end and the manhole 33 at the laying end, so that the tubular lining material 13 and A structure in which the primary sheet 47 is located between the existing pipe 11 and the primary sheet 47 is effective when, for example, the existing pipe 11 is significantly damaged, and there is intrusion of soil water. The primary sheet 47 covers the existing pipe inner peripheral surface 11a, so that the filling material can be filled smoothly.

Next, modified examples corresponding to the above-described embodiments will be described.
FIG. 11 is a cross-sectional view of a lining material provided with unevenness, and FIG. 12 is a front view of a lining structure using a tubular lining material formed by the lining material of FIG.
In the above embodiment, the case where the convex portions 21 of the concave and convex sheet 15 are relatively sparse has been described as an example. However, as shown in FIG. 11, the concave and convex sheet 15 is arranged with the convex portions 21 close to each other. It may be dense. That is, in the uneven sheet 15, a sufficient gap is formed between the adjacent protrusions 21, but in the uneven sheet 15 </ b> A according to the present modification, the adjacent protrusions 21 are in a staggered manner. Yes.
Therefore, in the lining material 13A created with such an uneven sheet 15A, as shown in FIG. 12, the lining material 13A is formed on the inner peripheral surface 11a of the existing pipe 11 by the convex portions 21 in which the lining material 13A is densely arranged. It is supported and the support strength can be improved.

FIG. 13 is a cross-sectional view of a lining material in which a concavo-convex sheet having unevenness formed densely on the entire surface of one side of a base material sheet, and FIG. 14 shows a lining structure using a tubular lining material formed by the lining material of FIG. It is a front view.
In each of the above embodiments, as shown in FIG. 2, the case where the concave and convex sheets 15 formed in a quadrangular shape are arranged in a staggered manner has been described as an example. Alternatively, the base sheet 17 may be bonded to the entire surface of the one surface 17a.
By inserting the lining material 13B having such an uneven sheet 15A on the entire outer periphery into the existing pipe 11, the entire outer periphery of the lining material 13B contacts the inner peripheral surface 11a of the existing pipe 11 as shown in FIG. As a result, a higher support strength can be obtained, and the outer periphery of the lining material 13 is in contact with the inner peripheral surface 11a of the existing pipe 11 over the entire circumference. The roundness of the lining material 13 after solidification can be increased.

FIG. 15 is a cross-sectional view of the lining material with the convex portion tip removed.
The above-described concavo-convex sheet 15 and concavo-convex sheet 15 </ b> A may be formed with a through-hole 51 in which the tip of the predetermined convex portion 21 is excised.
In the concavo-convex sheet 15 in which the through holes 51 are formed, when the filling material is filled in the gap 25 between the lining material 15 and the existing pipe 11 after the lining material 13 has been reconstructed in the existing pipe 11, the filling material Passes through the concavo-convex sheet through hole 51 and reaches the front and back surfaces of the concavo-convex sheet 15, and the solidified filler penetrates the concavo-convex sheet 15 and is integrated. That is, the filler is solidified as a unit between the base sheet 17 and the existing pipe inner surface 11a in a state in which the uneven sheet 15 is embedded.
Therefore, according to this modification, the filler spreads well over the front and back surfaces of the concavo-convex sheet, so that the solidified filler penetrates the concavo-convex sheet 15 and is integrated, and the peel strength of the lining material with respect to the existing pipe after solidification Can be increased.

FIG. 16 is a cross-sectional view of a main part of a strip-shaped lining material in which side edges are joined to each other.
In each of the above embodiments, the side edges of the lining material 19 are joined together to form the lining material 13 in advance, and the lining material 13 is folded into a U shape and inserted into the existing pipe 11. However, the tubular lining material 13 may be formed into a tubular shape by joining a sheet-like lining material 19 on site.

  In this case, a flexible concavo-convex sheet 15 is joined to one surface 17 a of a flexible flat base sheet 17 to form a long strip-shaped lining material 19 A, which is wound around a reel 27. To the site. On the other hand, an edge joining device (not shown) is installed in the manhole 31 on the insertion side of the lining material 19A. Then, the lining material 19A wound around the reel 27 is fed out, and the edge portions in the longitudinal direction of the lining material 19A are joined to form the tubular lining material 13 so that the concavo-convex sheet 15 faces outside. The material 13 is inserted into the existing pipe 11. In addition, the sheet | seat strip-shaped lining material 19A which forms the tubular lining material 13 may be divided into a plurality of parts in the circumferential direction, that is, divided into two parts or three parts with respect to the circumferential length.

  According to such a modification, the sheet-like lining material 19A is carried into the site, and the lining material 19A is joined at the edges so that the concave-convex sheet 15 is on the outside, so that the tubular lining material 13 is joined. Can be inserted into the existing pipe 11 while forming.

  Further, in the above-described embodiment, the example in which the concavo-convex sheet 15 formed in a quadrangular shape is arranged in a staggered manner as shown in FIG. 2 has been described. However, as shown in FIG. It is good also as a structure which forms in a width | variety strip | belt shape and joins this uneven | corrugated sheet | seat 15 to the one surface 17a of the base material sheet 17. FIG. When the lining material 13 is formed in a tubular shape, the concavo-convex sheet 15 is provided in a stripe shape along the axial direction. With such a configuration, it is possible to obtain an effect that the flow in the axial direction becomes good when the filler is filled.

  Further, although not shown, a reinforcing material such as a fiber material (for example, FRP) may be wound around the outer periphery of the lining material 13. According to the lining material 13 in which such a reinforcing material is wound, when the gap 25 is filled with a filler such as liquid mortar, the reinforcing material is embedded in the mortar, thereby increasing the strength of the mortar after solidification. And a more reliable lining structure can be obtained.

It is a front view of the lining structure concerning the present invention. It is a perspective view of the lining material inserted in the existing pipe. It is a partially expanded perspective view of the lining material which forms the lining material shown in FIG. It is explanatory drawing which represented the deformation | transformation process of the lining material by (a)-(c). It is explanatory drawing showing the insertion condition of the lining material. It is explanatory drawing which represented the decompression | restoration process of the lining material by (a)-(d). It is explanatory drawing showing the lining material insertion condition to the existing pipe which has a branch pipe. It is a front view of the lining structure by the lining material which extrapolated the primary sheet. It is a front view before the restoration | reconstruction of the lining material which has a primary sheet shown in FIG. It is a longitudinal cross-sectional view of the existing pipe in which the lining material which has a primary sheet was inserted. It is sectional drawing of the lining material in which the unevenness | corrugation was provided densely. It is a front view of the lining structure using the tubular lining material formed with the lining material of FIG. It is sectional drawing of the lining material to which the uneven | corrugated sheet | seat which formed the unevenness | corrugation densely on the one surface whole surface of the base material sheet was joined. It is a front view of the lining structure using the tubular lining material formed with the lining material of FIG. It is sectional drawing of the lining material by which the convex part front-end | tip was excised. It is principal part sectional drawing of the strip | belt-shaped lining material to which side edge parts are joined. It is a schematic perspective view of the tubular lining material of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Existing pipe 11a ... Inner peripheral surface 13 ... Lining material (tubular lining material)
15 ... Uneven sheet made of thermoplastic resin (uneven sheet)
17 ... Thermoplastic resin sheet (base sheet)
17a ... One side 19 ... Lining material (sheet-shaped lining material)
25 ... Gap 41 ... Branch pipe 45 ... Internal communication opening 47 ... Primary sheet 51 ... Through hole

Claims (6)

The existing pipe has a lining structure in which the inner peripheral surface of the existing pipe is covered with a lining material,
The lining material is formed in a tubular shape so that a flexible thermoplastic resin concavo-convex sheet is bonded to one surface of a flexible flat thermoplastic resin sheet, and the concavo-convex sheet is on the outside. And
An existing pipe lining structure, wherein a filler is filled and solidified in a gap between the tubular lining material inserted into the existing pipe and the existing pipe.   Between the existing pipe and the lining material, a thermoplastic resin-made primary sheet is attached, and the filler is filled in the gap between the primary sheet and the lining material and solidified. The existing pipe lining structure according to claim 1, wherein   The concavo-convex sheet made of thermoplastic resin is formed of a sheet in which concavo-convex portions are alternately formed on both the front and back surfaces, and the end surfaces of the convex portions on both the front and back surfaces are present on a spaced surface, and the tip of one convex portion is the heat The lining structure for an existing pipe according to claim 1 or 2, wherein the lining structure is joined to one surface of a sheet made of a plastic resin. A lining method for an existing pipe that covers the inner peripheral surface of the existing pipe with a lining material,
The lining material is formed into a tubular shape such that a flexible thermoplastic resin concavo-convex sheet is joined to one surface of a flexible flat thermoplastic resin sheet, and the concavo-convex sheet is on the outside. And
After the lining material is folded and inserted into the existing pipe, it is supported in a tubular shape from the inner surface side, and the gap between the lining material and the existing pipe is filled with the filler in a state along the existing pipe. An existing pipe lining method characterized by solidifying and solidifying.   The longitudinal direction of the thermoplastic resin sheet is such that the lining material is bonded in advance to the one surface of the thermoplastic resin sheet and the thermoplastic resin uneven sheet is on the outside. The lining method for an existing pipe according to claim 4, wherein the edges of the pipes are joined to form a tubular shape.   After the thermoplastic resin primary sheet formed in a tubular shape is attached between the existing pipe and the lining material, the lining material is inserted, and the filler is formed between the primary sheet and the lining material. 6. The existing pipe lining method according to claim 4, wherein the gap is filled and solidified.

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