JP4247443B2 - Repair member for existing buried pipe, and repair method for existing buried pipe using the same - Google Patents

Description

  The present invention relates to a repair member for repairing breakage of an existing buried pipe such as a fume pipe or a ceramic pipe, and a repair method for an existing buried pipe using the repair member.

Conventionally, various methods of repairing existing buried pipes such as fume pipes and ceramic pipes have been proposed in which a lining material formed of a thermoplastic resin material is inserted into the existing buried pipe and the inner surface of the buried pipe is lined. (Patent Documents 1 and 2). For example, in the lining method of Patent Document 1, after inserting a thermoplastic resin pipe such as vinyl chloride resin, which is a lining material, into an existing buried pipe, the pipe is heated and softened and pressurized from the inner surface in the radial direction. The inner surface of the buried pipe is lined by expanding and hardening.
JP-A-5-8297 Japanese Patent No. 3702390

  By the way, the existing buried pipe may be damaged by the subsidence of the ground or an impact such as an earthquake, and a part of the pipe may be depressed. In this case, when the lining material is inserted into the existing buried pipe, it is difficult for the lining material to be caught in the depressed portion and inserted into the buried pipe. Moreover, even if it can be inserted, when the resin pipe softened as in Patent Document 1 is subjected to pressure expansion, the pipe comes into contact with the depressed portion and is torn or extended. There was a problem that it could not be pushed back. Therefore, in the above case, it is necessary to dig up a damaged buried pipe to repair or replace it before performing lining, and there is a problem that the work is very troublesome.

  The present invention has been made to solve the above problems, and provides a repair member for an existing buried pipe that can easily repair a damaged existing buried pipe, and a method for repairing an existing buried pipe using the same. The purpose is to do.

  The present invention is a repair member for repairing an existing buried pipe, which has been made to solve the above problems, and a rectangular plate that can be wound into a roll, and one end of the plate A locking portion provided at the other end of the plate body and a locked portion provided at the other end of the plate body, and the locking portion and the locked portion are formed in a roll shape. In the wound state, the plate body cannot be locked when the outer diameter of the plate body is expanded, but can be locked when the outer diameter of the plate body is reduced, and the locking portion engages the locked portion. It is configured to restrict the reduction of the outer diameter of the plate when stopped.

  In the repair member, it is preferable that the locking portions are arranged at a plurality of positions in the length direction of the plate body.

  Further, the latching portion is provided with a tongue piece projecting obliquely toward the edge on the one end side of the plate body, and the latched portion is configured to be the edge on the other end side of the plate body. be able to. When configured in this way, the tongue piece protrudes inward of the roll-shaped plate body in a state in which the plate body is wound in a roll shape so that the one end portion of the plate body is disposed outside. Can be configured. Further, it is preferable that the tongue piece is formed by cutting and raising a part of the plate.

  Moreover, it is preferable that at least one of the one end and the other end of the plate is made of spring steel. Or the whole board can also be comprised with spring steel.

  The above-mentioned existing buried pipe repairing method according to the present invention is made to solve the above-mentioned problem, and includes a step of preparing a repair member in a state where a plate is wound in a roll shape, and an existing buried pipe to be repaired Inserting the repair member in which the plate is wound into a roll into the tube, and pressurizing the inner surface of the plate from the inside of the plate wound in the roll, thereby the outer diameter of the plate And a step of locking the locked portion to the locking portion by supporting the inner surface of the plate body and supporting the inner surface of the existing buried pipe by the repair member. Features.

  In the above-described method for repairing the existing buried pipe, the plate body can be pressurized by inserting a pressure-resistant pressure bag into the roll-shaped plate body and inflating it.

  According to the repair member according to the present invention, the locking portion provided at one end portion of the rectangular plate body and the locked portion provided at the other end portion wind the plate body in a roll shape. Thus, the plate body cannot be locked when the outer diameter of the plate body is expanded, but can be locked when the outer diameter of the plate body is reduced, and when the locking portion locks the locked portion, the plate It is configured to regulate the reduction of the outer diameter of the body. Therefore, the damaged existing buried pipe can be repaired using the repair member according to the present invention as follows, for example. That is, the outer diameter of the plate body is reduced by inserting the repair member in which the plate body is wound into a roll shape into an existing buried pipe to be repaired and pressurizing the inner surface of the plate body using a pressure-resistant pressure bag or the like. Expand. At the time of expansion, since the locking portion of the plate body does not lock the locked portion as described above, if there is a recessed portion in the existing embedded pipe, the outer peripheral surface of the plate body The outer diameter of the plate can be expanded while pushing back the depressed portion. Then, when the desired expansion radius is reached, the pressurization of the inner surface of the plate body is stopped. Then, the depressed portion presses the plate body inward by the dead weight of the depressed portion, the pressure from the outside, or the like, the plate body is rewound, and the outer diameter of the plate body is reduced. At the time of this reduction, the locking portion of the plate can lock the locked portion as described above, and the reduction of the outer diameter of the plate is restricted by locking the locked portion. By doing so, the pipe inner surface of the existing buried pipe is supported in a state in which the recessed portion of the existing buried pipe is pushed back by the repair member. Therefore, unlike the conventional example, it is not necessary to dig up and repair or replace the damaged existing buried pipe before lining, and the existing buried pipe can be easily repaired.

  Further, in the repair member according to the present invention, the following effects can be obtained by arranging the locking portions at a plurality of positions in the length direction of the plate. That is, as described above, when the outer diameter of the roll-shaped plate body is expanded in the existing embedded pipe, there is a fragment of the existing embedded pipe between the inner peripheral surface of the existing embedded pipe and the outer peripheral surface of the plate body. The outer diameter of the plate cannot be expanded so that the outer peripheral surface of the roll-shaped plate touches the entire inner peripheral surface of the existing embedded pipe due to some reason such as falling and being pinched, and the depressed portion cannot be pushed back completely. There is. In this case, if there is only one locking portion, the locked portion may not be locked to the locking portion. On the other hand, by disposing a plurality of locking portions in the length direction of the plate, even when the outer diameter of the plate cannot be expanded, the locked portion is locked to one of the plurality of locking portions. It can be configured to be possible. Therefore, even if it is a case where the depression part of an existing underground pipe cannot be pushed back completely as mentioned above, an existing underground pipe can be repaired.

  The repair member according to the present invention can be applied not only to a buried pipe buried underground but also to a buried pipe buried in embankment.

  Hereinafter, an embodiment of a repair member for an existing buried pipe according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a repair member according to the present embodiment. In the following description, the same or similar components as those of the repair member in FIG. 1 may be denoted by the same reference numerals and detailed description thereof may be omitted.

  As shown in FIG. 1, the repair member 1 according to the present embodiment is configured by a rectangular plate 3. The plate body 3 has a central portion 5 in the length direction (X direction in FIG. 1) made of general structural steel (SS material), and one end portion 7 and the other end portion 9 made of spring steel. The center part 5 and the one end part 7 and the other end part 9 are connected by welding or the like, and the plate body 3 can be wound in a roll shape. The length of the plate body 3 is longer than the inner peripheral length of the existing embedded pipe to be repaired. As will be described later with reference to FIG. 4, the outer periphery of the plate body 3 wound in a roll shape within the existing embedded pipe 15 When the outer diameter of the plate body 3 is expanded so that the surface contacts the entire inner peripheral surface of the existing embedded pipe 15, the other end portion 9 of the plate body 3 comes into contact with the inside of the one end portion 7. Yes. Examples of the inner peripheral length of the existing embedded pipe to which the repair member 1 of the present embodiment is applied include about 1000 mm, about 1500 mm, and about 1650 mm. Further, the width of the plate body 3 is appropriately set according to the size of the damaged portion of the existing buried pipe. The thickness of the plate 3 can be set to 0.5 to 2.0 mm, for example, when it is made of general structural steel (SS material) and spring steel as described above.

  An end edge 9a on the other end 9 side of the plate 3 (hereinafter referred to as the other end 9a) can be locked to the one end 7 of the plate 3 when the plate 3 is wound in a roll shape. Four tongue piece groups 11A, 11B, 11C, and 11D are provided. The tongue piece groups 11A, 11B, 11C, and 11D are arranged in the length direction of the plate body 3 (in the direction of arrow X in FIG. 1) on the edge 7a on the one end 7 side of the plate body 3 (hereinafter referred to as one end edge 7a). They are arranged at predetermined intervals in this order from the side. In addition, the tongue piece groups 11A, 11B, 11C, and 11D respectively have a plurality of tongue pieces 11a, 11b, 11c, and 11d arranged in a line in the width direction of the plate 3 (the arrow Y direction in FIG. 1). The tongue pieces 11a, 11b, 11c, and 11d are arranged in a staggered manner. When the outer diameter of the plate body 3 is expanded so that the outer peripheral surface of the roll-shaped plate body 3 is in contact with the entire inner peripheral surface of the existing embedded pipe 15 as shown in FIG. The other end edge 9a of the plate body 3 is provided at a position where the other end edge 9a is disposed closer to the one end edge 7a side of the plate body 3 than the tongue piece group 11A. Further, the tongue pieces 11a, 11b, 11c, and 11d are formed so as to project obliquely toward the one end edge 7a of the plate body 3 by cutting and raising a part of the plate body 3. With this configuration, the tongue pieces 11a, 11b, 11c, and 11d have the other end edge 9a of the plate body 3 when the outer diameter of the plate body 3 is expanded while the plate body 3 is wound in a roll shape, as will be described later. The other end edge 9a can be locked when the outer diameter of the plate body 3 is reduced, and the roll-shaped plate body when the tongue piece 11a engages the other end edge 9a. The reduction of the outer diameter of 3 is regulated. The tip portions of the tongue pieces 11a, 11b, 11c, and 11d are formed to be rounded so that the other end edge 9a of the plate body 3 can be easily locked.

  Next, a method for repairing an existing buried pipe using the repair member 1 configured as described above will be described with reference to the drawings. 2-5 is a figure explaining the repair method of the existing underground pipe | tube using the repair member 1 which concerns on this embodiment.

  First, as shown in FIG. 2, the plate 3 is wound into a roll. More specifically, one end portion 7 of the plate body 3 is disposed on the outside, and the tongue pieces 11 a, 11 b, 11 c, and 11 d are wound so as to protrude inward of the roll-shaped plate body 3. At this time, the other end edge 9a of the plate body 3 is wound so as to exceed the tongue piece group 11D, and the bag insertion space is such that a pressure bag 13 (to be described later) can be inserted into the central portion of the roll-shaped plate body 3. 4 is provided. Then, the pressure bag 13 is inserted into the bag insertion space 4 after temporarily fixing the one end 7 of the plate 3 to the outer peripheral surface of the plate 3 with the adhesive tape 17 in this state. The pressure bag 13 is formed by forming a pressure-resistant fabric subjected to watertight processing into a bag shape, has at least approximately the same length as the width of the repair member 1, and is inserted into the bag of the plate 3 in a contracted state. It is inserted into the space 4 and is configured to inflate by injecting water into the pressure bag 13 from an injection tube 14 provided at one end.

  Next, as shown in FIG. 3, the repair member 1 wound in a roll shape and inserted with the pressure bag 13 is inserted into the damaged existing embedded pipe 15. At this time, the outer diameter of the repair member 1 is sufficiently smaller than the inner diameter of the existing embedded pipe 15 to be repaired by winding the plate 3 in a roll shape as described above. Therefore, the repair member 1 can be easily inserted without being caught on the recessed portion 19 of the existing buried pipe 15.

  Next, as shown in FIG. 4, in a state where the repair member 1 is inserted into the existing embedded pipe 15, the pressure bag 13 is inflated, and the inner surface of the plate body 3 is pressurized from the inside of the plate body 3. The outer diameter of the roll-shaped plate 3 is expanded. Then, first, the adhesive tape 17 is peeled off from the outer peripheral surface or one end portion 7 of the plate body 3 or broken. Then, the recessed portion 19 of the existing embedded pipe 15 that has been damaged due to the expansion is pushed back by the outer peripheral surface of the plate body 3, and the outer peripheral surface comes into contact with the entire inner peripheral surface of the existing embedded pipe 15. At this time, since the tongue piece group 11A is provided at the position as described above, the other end edge 9a of the plate body 3 is disposed closer to the one end edge 7a than the tongue piece group 11A. Further, since the tongue pieces 11a, 11b, 11c, and 11d protrude obliquely toward the one end edge 7a of the plate body 3 as described above, the outer diameter of the plate body 3 is being expanded. The other end edge 9a of the plate body 3 is not locked. Moreover, since the tongue pieces 11a, 11b, 11c, and 11d are formed of spring steel, they can be bent elastically. Therefore, even if the other end 9a of the plate 3 presses and bends the tongues 11a, 11b, 11c, and 11d while the outer diameter of the plate 3 is expanding, It returns to the original protruding state.

  Then, as shown in FIG. 5, the inflated pressure bag 13 is reduced to stop pressurization of the inner surface of the plate body 3. Then, the depressed portion 19 presses the outer peripheral surface of the plate body 3 due to the weight of the depressed portion 19 of the existing buried pipe 15 or external pressure, and the plate body 3 is rewound, and the other end edge 9a of the plate body 3 is Locked by the tongue 11a, the reduction of the outer diameter of the plate body 3 is restricted. At this time, since the one end 7 and the other end 9 of the plate body 3 are formed of spring steel and are difficult to curl, the other end edge of the plate body 3 when the plate body 3 is unwound. 9a is easily slid along the inner surface of the one end 7 of the plate body 3, and the tongue 11a is returned to the obliquely protruding state as described above. 9a is securely locked. By locking in this way, the depressed portion 19 is maintained in a state where it is pushed back, and the pipe inner surface of the existing buried pipe 15 is supported by the repair member 1. In this embodiment, the tongue piece groups 11A, 11B, 11C, and 11D constitute four locking portions in the present invention, and the other end edge 9a of the plate body 3 constitutes the locked portion in the present invention. Yes.

  Then, the pressure bag 13 is pulled out from the existing buried pipe 15. The repair of the existing buried pipe 15 damaged by the above is completed, and thereafter the lining in the existing buried pipe 15 is performed.

  As described above, according to the repair member 1 of the present embodiment, the tongue pieces 11a, 11b, 11c, and 11d provided at the one end portion 7 of the rectangular plate body 3 and the other end edge 9a of the plate body 3 are provided. The plate body 3 is wound in a roll shape and cannot be locked when the outer diameter of the plate body 3 is expanded, but can be locked when the outer diameter of the plate body 3 is reduced. 11b, 11c, 11d is configured to restrict the reduction of the outer diameter of the plate 3 when the other end edge 9a is locked. Therefore, as described above, while the outer diameter of the roll-shaped plate body 3 is being expanded by pressurizing the inner surface of the plate body 3 in the existing embedded pipe 15, the tongue pieces 11a, 11b, 11c, 11d. However, the other end edge 9a of the plate body 3 is not locked. On the other hand, when the outer diameter of the plate body 3 is reduced by stopping the pressurization of the inner surface of the plate body 3, the other end edge 9a of the plate body 3 is locked to the tongue piece 11a, and the outer diameter of the plate body 3 is reduced. The reduction of is now regulated. As a result, the pipe inner surface of the existing buried pipe 15 is supported in a state where the recessed portion 19 of the existing buried pipe 15 is pushed back by the repair member 1. Therefore, unlike the conventional example, it is not necessary to dig up and repair or replace a damaged existing buried pipe before lining, and the damaged existing buried pipe can be easily repaired.

  Moreover, in the said embodiment, the tongue pieces 11a, 11b, 11c, and 11d are comprised by cutting and raising a part of the board 3, and are comprised so that it can be bent elastically. Therefore, when the existing embedded pipe 15 is repaired by the repair member 1 and then the inner surface of the pipe is lined, the tongue pieces 11a, 11b, 11c, and 11d are pressed by the lining material and folded back into the plane of the plate body 3. As a result, the plate 3 does not protrude. As a result, the lining can be performed so that the lining material is in close contact with the inner surface of the plate 3.

  Moreover, in the said embodiment, although four tongue piece groups 11A, 11B, 11C, and 11D are arrange | positioned in the length direction of the plate body 3, there exist the following effects by arrange | positioning in this way. be able to. That is, as described above, when the outer diameter of the roll-shaped plate body 3 is expanded in the existing embedded pipe 15, the existing embedded pipe 15 is disposed between the inner peripheral surface of the existing embedded pipe 15 and the outer peripheral surface of the plate body 3. The outer diameter of the plate body 3 cannot be expanded so that the outer peripheral surface of the plate body 3 is in contact with the entire inner peripheral surface of the existing embedded tube 15 due to some factor such as the falling pieces of the tube 15 falling and being caught, and the depressed portion 19 may not be pushed back completely. In this case, the other end edge 9a of the plate body 3 may not be locked to the tongue piece 11a of the tongue piece group 11A. On the other hand, since the tongue piece groups 11B, 11C, and 11D are disposed closer to the central portion 5 than the tongue piece group 11A, the tongue pieces 11b, 11c, and 11b are formed even when the outer diameter of the plate body 3 cannot be expanded. It can be configured such that the other end edge 9a of the plate body 3 can be locked to any of 11d. Therefore, even if the depressed portion 19 of the existing buried pipe 15 cannot be completely pushed back in this way, the existing buried pipe can be repaired.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning.

  In the said embodiment, although the center part 5 of the board 3 is comprised with general structural steel and the both ends 7 and 9 are comprised with spring steel, it is not limited to this, One of them may be made of a metal material other than spring steel. Or you may comprise the whole board 3 with spring steel. Further, as the material of the plate body 3, as long as it has a strength that can support the inner surface of the existing buried pipe in a state in which the portion where the damaged existing buried pipe is depressed is pushed back, It is not limited. Therefore, as long as it has such strength, the plate body 3 may be formed of a material other than a metal material, and may be formed of a resin material such as an ABS resin or a hard vinyl chloride resin. In addition, the plate body 3 is formed in a rectangular shape, but is not particularly limited as long as the plate body 3 can be wound in a roll shape and can form a locking portion at one end and a locked portion at the other end.

  Moreover, in the said embodiment, although four tongue piece groups 11A, 11B, 11C, and 11D are arrange | positioned in the length direction of the plate body 3, it is not limited to this, A tongue piece is the plate body 3. What is necessary is just to comprise suitably so that it may arrange | position with the suitable space | interval in the several position of a length direction.

  Moreover, although the front-end | tip part of tongue piece 11a, 11b, 11c, 11d is formed so that it may become roundish, it is not limited to this, A part of plate body 3 is cut and raised in rectangular shape, and the front-end | tip You may form so that the corner | angular part of a part may be chamfered. In addition, the tongue pieces 11a, 11b, 11c, and 11d are not formed integrally by cutting and raising a part of the plate body 3, but by preparing the tongue pieces as separate members and fixing them by welding or the like. It may be configured.

  Moreover, in the said embodiment, although the latching | locking part is comprised by the tongue pieces 11a, 11b, 11c, and 11d, especially if it is a structure where the one end part and other end part of the board 3 are latched. It is not limited. For example, as shown in FIG. 6A, the one end 7 of the plate body 3 is provided with a notch 7 b having a notch at one end edge 7 a and a plurality of insertion holes 7 c as a locking portion. As the locked portion, a protruding piece 9b protruding from the other end edge 9a of the plate body 3 is provided. Then, as shown in FIG. 6B, the protruding piece 9b is locked to the notch 7b, or the protruding piece 9b is inserted into and locked to the insertion hole 7c (not shown). Good. Alternatively, as shown in FIG. 7 (a), a plurality of stepped portions 7d capable of receiving the other end edge 9a are provided by bending one end portion 7 of the plate body 3 into a sawtooth cross section. ), The other end edge 9a may be locked to any one of the stepped portions 7d. Various changes such as a combination of the stepped portion 7d and the tongue pieces 11a, 11b, 11c, and 11d as the locking portion are also possible.

  Further, in the above embodiment, when the plate body 3 is plastically deformed when wound in a roll shape and an elastic restoring force is applied when the inner diameter of the roll plate body 3 is expanded, The outer diameter of the plate 3 can be reduced by the elastic restoring force, and the locked portion at the other end can be locked to the locked portion at the one end of the plate 3.

  In the repair method of the existing buried pipe according to the above embodiment, the pressure bag 13 is inserted into the bag insertion space 4 in a state in which the plate body 3 is wound. However, the present invention is not limited to this. The pressure bag 13 may be placed on the plate 3 and wound so as to wrap the pressure bag 13 with the plate 3. Alternatively, the pressure bag 13 may be inserted after the repair member 1 is inserted into the existing buried pipe 15.

  Moreover, although the pressure bag 13 is used as a means to pressurize the inner surface of the plate body 3 wound in a roll shape, as long as the inner surface of the plate body 3 can be pressurized by using a hydraulic jack or the like. There is no particular limitation.

It is a perspective view of the repair member which concerns on one Embodiment of this invention. It is a figure explaining the repair method of the existing underground pipe | tube using the repair member of FIG. It is a figure explaining the repair method of the existing underground pipe | tube using the repair member of FIG. It is a figure explaining the repair method of the existing underground pipe | tube using the repair member of FIG. It is a figure explaining the repair method of the existing underground pipe | tube using the repair member of FIG. It is a perspective view of the repair member which concerns on other embodiment of this invention. It is a perspective view of the repair member which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Repair member 3 Plate body 4 Bag insertion space 5 Center part 7 One end part 7a One end edge 9 Other end part 9a Other end edge 11A, 11B, 11C, 11D Tongue piece group 11a, 11b, 11c, 11d Tongue piece 13 Pressure bag 15 Existing buried pipe 17 Adhesive tape 19 Depressed part X Length direction of plate body Y Direction of width of plate body

Claims (7)

A rectangular plate that can be wound into a roll, a locking portion provided at one end of the plate, and a locked portion provided at the other end of the plate,
The locking portion and the locked portion cannot be locked when the outer diameter of the plate body is expanded while the plate body is wound in a roll shape, while the outer diameter of the plate body is reduced. It is sometimes configured to be able to be locked, and is configured to regulate the reduction of the outer diameter of the plate body when the locking portion locks the locked portion .
The plate body is composed of a central part and the one end part and the other end part connected to both ends thereof, the one end part and the other end part are made of spring steel, and the central part is for general structure. A repair member for repairing existing buried pipes made of steel .   The repair member according to claim 1, wherein the locking portions are arranged at a plurality of positions in a length direction of the plate body. The locking portion includes a tongue piece projecting obliquely toward an edge on the one end side of the plate body,
The repair member according to claim 1, wherein the locked portion is an edge on the other end side of the plate body.   In a state where the plate body is wound in a roll shape so that the one end portion of the plate body is disposed outside, the tongue piece is configured to protrude inward of the roll-shaped plate body. The repair member according to claim 3, wherein the repair member is provided.   The repairing member according to claim 3 or 4, wherein the tongue piece is formed by cutting and raising a part of the plate body. A repair method of the existing buried pipe with a repairing member according to any one of claims 1 to 5,
Preparing the repair member in a state where the plate is wound into a roll; and
Inserting the repair member in which the plate body is wound in a roll shape into an existing buried pipe to be repaired; and
Expanding the outer diameter of the plate by pressing the inner surface of the plate from the inside of the plate wound in a roll;
Stopping the pressurization of the inner surface of the plate body, thereby locking the locked portion to the locking portion, and supporting the inner surface of the existing buried pipe by the repair member. Repair method for existing buried pipes. The pressurization of the inner surface of the plate body is performed by inserting a pressure-resistant pressure bag into the roll-shaped plate body and inflating the pressure bag, according to claim 6 . Repair method.

Images