JP2007124794A - Method for repairing protective tube in which cable has been laid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a method for repairing a protective tube under a state where a cable has been laid. <P>SOLUTION: After a cable 25 is placed in one split member 2 constituting a tubular repair material 1 on one opening side of a protective tube 22, split face of the other split member 3 is bonded to the split face of the split member 2 to form the tubular repair material 1 which is then inserted into the protective tube 22 from one opening. Subsequently, a next tubular repair material 1 is formed by above-mentioned method and after one opening end of the tubular repair material 1 is connected to the opening end of the tubular repair material 1 previously inserted into the protective tube 22, the tubular repair material 1 is inserted into the protective tube 22, and then the previous tubular repair material 1 is moved to the other opening side of the protective tube 22. The tubular repair material 1 is arranged from one opening end to the other opening end of the protective tube 22 under a state where the cable 25 is passed through the protective tube 22 by repeating the above-mentioned steps repeatedly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cable laying protection pipe repairing method for repairing a protection pipe having a cable laid inside.

As a method of repairing a pipe buried in the ground, a method of repairing by fixing a cylindrical lining material on the inner surface of the buried pipe is known. In this method, a cylindrical lining material formed of a flexible material impregnated or coated with a thermoplastic resin, a photocurable resin, or a room temperature curable resin is disposed inside a pipe, and this cylindrical lining material is used. Inflated with water pressure or air pressure and pressed against the inner surface of the pipe line, and the lining resin is cured and cured by passing hot water, steam, or irradiating ultraviolet rays into the cylindrical lining material. Yes (see, for example, Patent Document 1).
Japanese Patent Publication No. 7-4853

  However, the above-mentioned repair method for buried pipes can be applied if there is no obstruction inside the pipe, but when the cable is laid inside the pipe, the cable cannot be applied because it is in the way. There was a problem. For example, power cables, telephone lines, and other cables have been widely housed and installed in protective pipes buried in the ground. For repair of such protective pipes, It cannot be applied, and if it is to be applied, the cable must be removed from the protective tube, which is very laborious.

  An object of the present invention is to provide a cable laying protection pipe repairing method capable of repairing a protection pipe having a cable laid therein in a state where the cable is laid.

  In order to solve the above-mentioned object, the invention according to claim 1 is a cable-installed protective pipe repairing method for repairing a protective pipe in which a cable is laid inside by using a tubular repair material, wherein the tubular The repair material is composed of two divided members divided in the axial direction, and the two divided members are coupled to the divided surfaces by joining the divided surfaces of the two divided members to form a tubular repair material. And a connecting means for connecting the open ends of the tubular repair material formed by joining the two split members by the joining means to both ends in the axial direction, and one of the protective tubes After inserting the cable from the split opening into one split member constituting the tubular repair material on the opening side, the split surface of the other split member is coupled to the split surface of the split member by a coupling means. A tubular repair material is formed, and the tubular repair material is After inserting the cable into one of the divided members constituting the tubular repair material on the one opening side of the protective tube and then inserting the cable into the protective tube from the one opening. A tubular repair material is formed by joining the divided surface of another divided member to the divided surface of the member, and one open end of the tubular repair material is connected to the open end of the tubular repair material previously inserted into the protective tube. After connecting by connecting means, the tubular repair material is inserted into the protective tube, the previous tubular repair material is moved to the other opening side of the protective tube, and the above steps are sequentially repeated, so that the inside The tubular repair material is arranged from one opening to the other opening of the protective tube in a state where the cable is passed.

  The invention described in claim 2 is characterized in that a large number of projections are formed on the surfaces of the two divided members constituting the tubular repair material according to claim 1.

  According to a third aspect of the present invention, the protrusions formed on the surfaces of the two divided members constituting the tubular repair material according to the second aspect are formed in the circumferential direction and / or the axial direction of the divided members. It is a rib.

  The invention according to claim 4, when the split surface of the other split member is coupled to the split surface of one split member constituting the tubular repair material according to claim 1, 2 or 3 by a coupling means, And one open end of the tubular repair material formed by joining the split surface of the other split member to the split surface of the split member is connected to the open end of the tubular repair material previously inserted into the protective tube by the connecting means. In doing so, a sealing agent is applied to the split surfaces of the split members to be joined and the open ends of the tubular repair material to be connected.

  The invention according to claim 5 is a cable according to claim 1, 2, 3 or 4 in which a protective tube having a cable laid therein is repaired using a flexible tubular repair material in addition to the tubular repair material. An installed protective tube repairing method, wherein the flexible tubular repair material is composed of two divided members divided in the axial direction, and the two divided members have a flexible structure in the axial direction. Formed by joining the split surfaces of the two split members to the split surfaces of the split members to form a flexible tubular repair material, and by joining the two split members at both axial ends by the joint means An opening end of the flexible tubular repair material and a connecting means for connecting the open end of the tubular repair material, and the inside of one split member constituting the flexible tubular repair material After inserting the cable from the split opening to the splitting surface of the splitting member The split surfaces of the split members are joined by a joining means to form a flexible tubular repair material, and one open end of the flexible tubular repair material is connected to the open end of the tubular repair material previously inserted into the protective tube. Connected by connecting means, the flexible tubular repair material is inserted into the protective tube, the tubular repair material is moved to the other opening side of the protective tube, and the flexible tubular repair material is inserted into the protective tube. By connecting one open end of a new tubular repair material to the open end of the tube by connecting means, moving the flexible tubular repair material to the other open side of the protective tube, and repeating the above steps sequentially The tubular repair material and the flexible tubular repair material are alternately arranged from one opening portion of the protective tube to the other opening portion while the cable is passed through the inside.

  According to the protective method for repairing a protective tube with a cable laid according to claim 1, the tubular repair material is formed by joining the split surfaces of two split members divided in the axial direction by a connecting means. A tubular repair material configured such that the open ends of the tubular repair material are connected by a connecting means is used, and the inside of one divided member constituting the tubular repair material on the one opening side of the protective tube After the cable is inserted through the split opening, the split surface of the other split member is joined to the split surface of the split member by a coupling means to form a tubular repair material, and the tubular repair material is put into the protective tube. After that, after the cable is inserted into one of the split members constituting the tubular repair material on the one opening side of the protective tube, and then to the split surface of the split member Tubular repair by connecting the split surfaces of other split members And connecting one open end of the tubular repair material to the open end of the tubular repair material previously inserted into the protective tube by connecting means, and then inserting the tubular repair material into the protective tube. By moving the previous tubular repair material to the other opening side of the protective tube and repeating the above steps in sequence, the tubular repair material is removed from the one opening portion of the protective tube in a state where the cable is passed through the inside. Since the method is arranged over the other opening, even if a cable is laid inside the protective tube, the cable-laid protective tube can be easily repaired by a simple operation without being obstructed by the cable. it can.

  According to the cable laid protective tube repair method according to claim 2, since a large number of protrusions are formed on the surfaces of the two divided members constituting the tubular repair material according to claim 1, Since the contact area between the inner peripheral surface of the protective tube and the tubular repair material inserted into the protective tube is reduced, and the frictional resistance when moving the tubular repair material to the other opening side of the protective tube is small, tubular repair The material can be inserted into the protective tube and easily moved to the other opening side of the protective tube.

  According to the protective method for repairing a cable laid protective tube according to claim 3, the protrusions formed on the surfaces of the two split members constituting the tubular repair material according to claim 2 are arranged in the circumferential direction of the split member and If the rib is formed in the axial direction, the contact area between the inner peripheral surface of the protective tube and the tubular repair material inserted into the protective tube is reduced, and the tubular repair material is moved to the other opening side of the protective tube. Since the frictional resistance when moved is small, the tubular repair material can be inserted into the protective tube and easily moved to the other opening side of the protective tube, and ribs formed on the surfaces of the two divided members The strength in the circumferential direction and / or the axial direction of the tubular repair material will be improved, and the thickness of the two divided members can be reduced accordingly, thereby reducing the weight of the tubular repair material and reducing the material cost. be able to.

  According to the cable laid protective pipe repairing method according to claim 4, the split surface of the other split member to the split surface of one split member constituting the tubular repair material according to claim 1, 2 or 3. Of the tubular repair material that has been inserted into the protective tube at one open end of the tubular repair material formed by joining the split surface of the other split member to the split surface of the split member. Since the sealing agent is applied to the split surface of the split member to be joined and the open end of the tubular repair material to be connected when connecting to the open end by the connecting means, the two splits constituting the tubular repair material It is possible to prevent water leakage from between the divided surfaces to which the members are joined and from between the connected tubular repair materials.

  According to the cable laying protection pipe repairing method according to claim 5, a flexible tubular repair material is used in addition to the tubular repair material according to claim 1, 2, 3, or 4. The flexible tubular repair material is composed of two divided members divided in the axial direction, and the two divided members have a flexible structure in the axial direction. And a dividing means for joining the divided surfaces of the two divided members to form a flexible tubular repair material, and two divided members at both axial ends by the connecting means. And a connecting means for connecting the opening end portion of the tubular repair material and the opening end portion of the tubular repair material, and constituting the flexible tubular repair material. After the cable is inserted into the split member from the split opening, the split portion The split surface of the other split member is connected to the split surface of the tube by a connecting means to form a flexible tubular repair material, and one open end of the flexible tubular repair material is inserted into the protective tube first. And connecting the flexible tubular repair material into the protective tube to move the previous tubular repair material to the other opening side of the protective tube, and inserting it into the protective tube. Connecting one open end of the new tubular repair material to the open end of the flexible tubular repair material by connecting means, and moving the flexible tubular repair material to the other opening side of the protective tube, By sequentially repeating, the tubular repair material and the flexible tubular repair material are alternately arranged from one opening portion of the protective tube to the other opening portion with the cable passing through the inside. Even if a cable is laid inside the protective tube, it will be disturbed by the cable. In addition, it is possible to easily repair a protective tube with a cable installed in a simple operation, and when the tubular repair material and the flexible tubular repair material are inserted and moved into the protective tube, the protective tube has a curved portion. In addition, the flexible tubular repair material disposed between the tubular repair materials bends according to the curved portion of the protective tube, and can smoothly move the tubular repair material and the flexible tubular repair material within the protective tube. The tubular repair material and the flexible tubular repair material can be reliably arranged from one opening portion of the protective tube to the other opening portion.

  Hereinafter, an example of the best mode for carrying out the cable layed protective tube repairing method according to the present invention will be described.

  FIGS. 1 to 4 show an example of a tubular repair material used in the cable laying protective pipe repair method according to the present invention, FIG. 1 is a perspective view of the tubular repair material, and FIG. 2 is a tubular repair material shown in FIG. FIG. 3 is a plan view of the inner surface of the other divided member obtained by dividing the tubular repair material shown in FIG. 1 into two parts, and FIG. It is an AA line expanded sectional view.

  The tubular repair material 1 of this example is composed of two divided members 2 and 3 that are divided in half in the axial direction. The two split members 2 and 3 are connected to the split surfaces 4 and 5 by connecting the split surfaces 4 and 5 of the two split members 2 and 3 to each other to form the tubular repair material 1 and both axial ends. Connecting means 7 for connecting the opening end of one tubular repair material 1 and the opening end of another tubular repair material 1 formed by joining the two split members 2 and 3 to each other by the joining means 6 It has a structure with.

  The two divided members 2 and 3 constituting the tubular repair material 1 are made of plastic, metal, or the like, but are made of plastic in this example. Further, in the coupling means 6 that forms the tubular repair material 1 by joining the divided surfaces 4 and 5 of the two divided members 2 and 3, in this example, the divided surface 4 of the one divided member 2. Although comprised from the fitting groove part 8 formed in the longitudinal direction and the protrusion part 9 formed in the division | segmentation surface 5 of the other division member 3, and fitting to the said fitting groove part 8, it is limited to this. It is not something. The fitting groove portion 8 of this example constituting the coupling means 6 has a groove depth wider than the groove opening portion, and the protrusion 9 has a head portion corresponding to the groove shape of the fitting groove portion 8. The groove 9 is wider than the groove opening of the fitting groove 8, and the protrusion 9 is pushed into the fitting groove 8 using plastic material deformation to be coupled.

  Further, the connecting means 7 connects the opening end of one tubular repair material 1 formed by joining the two divided members 2 and 3 with the joining means 6 and the opening end of another tubular repair material 1. Even if it exists, it is not specifically limited. In this example, the connecting means 7 has a small-diameter inner diameter portion 10 formed on one opening end side of the tubular repair material 1 and inserted into the large-diameter inner circumferential portion 10 on the other opening side. An outer peripheral portion 11 is formed, and the inner peripheral surface of the large-diameter inner peripheral portion 10 includes a straight groove 12 extending in the axial direction from the opening end portion and a cross groove 13 bending in the circumferential direction from the tip of the straight groove 12. A plurality of shaped locking groove portions 14 are formed at predetermined intervals in the circumferential direction, and the outer peripheral surface of the small-diameter outer peripheral portion 11 is engaged with the locking groove portion 14 at a position corresponding to the locking groove portion 14. A locking projection 15 that can be stopped is formed (see FIGS. 1, 2, and 3).

  And in connection with the opening edge part of one tubular repair material 1, and the opening edge part of the other tubular repair material 1, it forms in the internal peripheral surface of the large diameter inner peripheral part 10 of one tubular repair material 1. The engaging protrusion 15 formed on the outer peripheral surface of the small-diameter outer peripheral portion 11 of the other tubular repair material 1 is made to coincide with the engaging groove portion 14, and the large-diameter inner peripheral portion 10 of one tubular repair material 1. When the small-diameter outer peripheral portion 11 of the other tubular repair material 1 is inserted therein and the locking projection 15 that has advanced in the rectilinear groove 12 of the locking groove portion 14 reaches the intersecting groove 13, the other tubular repair material 1 is crossed. By rotating along the groove 13, the locking protrusion 15 enters the intersecting groove 13, and the locking protrusion 15 is locked in the intersecting groove 13, so that one tubular repair material 1 is replaced with another tubular repair material. 1 is secured, and the connection between one tubular repair material 1 and another tubular repair material 1 is completed.

  In the large-diameter inner peripheral portion 10 and the small-diameter outer peripheral portion 11 of the tubular repair material 1 constituting the connecting means 7, the other tubular repair material 1 is placed in the large-diameter inner peripheral portion 10 of one tubular repair material 1. When the small-diameter outer peripheral portion 11 is inserted, there is some play between the large-diameter inner peripheral portion 10 and the small-diameter outer peripheral portion 11, and there are also in the locking groove portion 14 and the locking protrusion 15 of the tubular repair material 1. Is a locking groove 14 formed on the inner peripheral surface of the large-diameter inner peripheral portion 10 of one tubular repair material 1 and is formed on the outer peripheral surface of the small-diameter outer peripheral portion 11 of the other tubular repair material 1. When the protrusion 15 is locked, it is preferable that there is some play between the locking groove 14 and the locking protrusion 15.

  In this way, it is possible to bend at the connection site between the tubular repair materials 1 connected by the connecting means 7, and when the tubular repair material 1 is inserted and moved into the protection tube described later, there is a curved portion in the protection tube. However, the tubular repair material 1 can be bent at the connection portion between the tubular repair materials 1 connected to the protection tube according to the curved portion, and the tubular repair material 1 can be smoothly moved in the protection tube.

  In this example, a large number of protrusions 16 are formed on the surfaces of the two divided members 2 and 3 constituting the tubular repair material 1. The protrusions 16 are ribs 17 and 18 formed in the circumferential direction and the axial direction of the divided members 2 and 3. The circumferential rib 17 and the axial rib 18 are formed so that the axial rib 18 is higher than the circumferential rib 17 (see FIG. 4). In this example, the protrusions 16 are the circumferential ribs 17 and the axial ribs 18, but may be either the circumferential ribs 17 or the axial ribs 18.

  FIG. 5 shows another example of the connecting means 7 for connecting the opening end portion of the one tubular repair material 1 and the opening end portion of the other tubular repair material 1. It is an inner surface side top view of one division member divided into two. In the connecting means 7 of this example, a female screw 19 is formed on the inner peripheral surface of the large-diameter inner peripheral portion 10 formed on one opening end side of the tubular repair material 1, and a small diameter formed on the other opening side. On the outer peripheral surface of the outer peripheral portion 11, a male screw 20 that is screwed into the female screw 19 is formed. Then, the male screw 20 formed on the outer peripheral surface of the small-diameter outer peripheral portion 11 of the other tubular repair material 1 is screwed into the female screw 19 formed on the inner peripheral surface of the large-diameter inner peripheral portion 10 of one tubular repair material 1. By combining them, another tubular repair material 1 is connected to one tubular repair material 1.

  FIG. 6 shows another example of the tubular repair material 1 composed of two split members 2 and 3 that are split in half in the axial direction. The tubular repair material 1 of this example includes two split members. One of the divided members 2 is longer than the other divided member 3 in the circumferential direction, that is, has a substantially C-shaped cross section. In the coupling means 6 for joining the divided surfaces 4 and 5 of the two divided members 2 and 3 to form the tubular repair material 1, in this example, the length of the divided surface 4 of one divided member 2 is used. The fitting groove 8 is formed in the direction, and the protrusion 9 is formed on the dividing surface 5 of the other divided member 3 and is fitted to the fitting groove 8. And in this example, the division member 2 formed in the said cross-sectional substantially C shape is formed with the elastic material, and the coupling | bonding of the division surfaces 4 and 5 of the division members 2 and 3 is cross-section substantially C-shaped. The split member 2 formed in a shape is pushed and spread between the split surfaces 4 and 4, and the split member 3 is inserted between the split surfaces 4 and 4, and is formed on the split surface 4 of the split member 2 by the restoring force of the spread split member 2. The tubular repair material 1 is obtained by fitting the protruding portions 9 formed on the dividing surface 5 of the dividing member 3 into the fitted groove portion 8 and joining the dividing surfaces 4 and 5 of the two dividing members 2 and 3 together. It comes to form.

  FIG. 7 shows another example of the tubular repair material 1 having protrusions 16 formed on the surface. In this example, a large number of protrusions 16 formed in a substantially hemispherical shape are formed on the surfaces of the divided members 2 and 3 at predetermined intervals. Projected.

  Next, as a first example of the cable laid protective tube repair method according to the present invention, a cable laid protective tube repair method for repairing a protective tube using the tubular repair material 1 configured as described above will be described with reference to FIG. This will be described with reference to FIG.

  FIG. 8 shows a state in which the cable is inserted from the divided opening into one split member 2 constituting the tubular repair material 1 on one opening side of the protective tube embedded in the ground. A longitudinal section showing a process of forming the tubular repair material 1 by joining the split surface 5 of the other split member 3 to the split surface 4 by the joining means 6 and inserting the tubular repair material 1 into the protective tube from one opening. FIG. 9 is a longitudinal sectional view showing a step of moving the tubular repair material 1 inserted into the protective tube to the other opening side of the protective tube by inserting the next tubular repair material 1 formed in the same manner as FIG. FIG. 10 and FIG. 10 are longitudinal views showing a state in which the tubular repair material 1 is sequentially inserted into the protective tube in the same manner as FIG. 9 and the tubular repair material 1 is arranged from one opening to the other opening of the protective tube. FIG.

  As shown in the figure, a protective tube 22 having a cable 25 laid therein is embedded in the ground 21 in a state of being separated by manholes 23a and 23b that stand vertically at predetermined intervals.

  In repairing such a protective tube 22, as shown in FIG. 8, first, in one of the divided members 2 constituting the tubular repair material 1, the manhole 23 a is opened in one opening of the protective tube 22. After the cable 25 is inserted into the inside from the divided opening, the divided surface 5 of the other divided member 3 is coupled to the divided surface 4 of the divided member 2 by the coupling means 6, and the cable 25 is passed inside. The tubular repair material 1 is formed, and the tubular repair material 1 through which the cable 25 is passed is inserted into the protective tube 22 from one opening.

  In forming the tubular repair material 1 in the state where the cable 25 is passed through the inside, the coupling means 6 for coupling the divided member 2 and the divided member 3 is formed in the longitudinal direction of the divided surface 4 of one divided member 2. If it is constituted by the fitted groove portion 8 and the protruding portion 9 that is formed on the divided surface 5 of the other divided member 3 and fits into the fitted groove portion 8, the inside of the one divided member 2 is formed. After the cable 25 is inserted from the divided opening, the protrusion 9 formed on the divided surface 5 of the other divided member 3 is pushed into the fitting groove 8 formed on the divided surface 4 of the one divided member 2. The tubular repair material 1 in a state in which the cable 25 is passed through can be easily formed by a simple operation such as joining.

  Moreover, when forming the tubular repair material 1 as described above, it is preferable to apply a sealing agent to the divided surfaces 4 and 5 of the divided members 2 and 3 to be joined. By applying a sealing agent to the divided surfaces 4 and 5 of the divided members 2 and 3, water leakage from between the divided surfaces 4 and 5 where the two divided members 2 and 3 constituting the tubular repair material 1 are joined is prevented. Can be prevented.

  Next, the open end of the tubular repair material 1 in which the next tubular repair material 1 in the state where the cable 25 is passed through the inside formed in the same manner as described above is inserted into the protective tube 22 at one open end portion first. After being connected to the part by the connecting means 7, it is inserted into the protective tube 22 and the tubular repair material 1 is moved to the other opening side of the protective tube 22 (FIG. 9). When the opening end of the next tubular repair material 1 is connected to the opening end of the tubular repair material 1 previously inserted into the protective tube 22 by the connecting means 7, the opening end of the tubular repair material 1 to be connected is also connected. It is preferable to apply a sealing agent. By applying a sealing agent to the opening end of the previous tubular repair material 1 and the opening end of the next tubular repair material 1, water leakage from between the connected tubular repair materials 1 and 1 can be prevented. it can.

  In order to move the tubular repair material 1 inserted from one opening of the protective tube 22 to the other opening side of the protective tube 22, the tubular repair material 1 is manually or jacked from the one opening side of the protective tube 22. Although it presses by an equivalent mechanical means or pulls the said tubular repair material 1 from the other opening side of the protective tube 22, it does not specifically limit. Further, in order to facilitate the movement of the tubular repair material 1 in the protective tube 22, a lubricant may be applied to the inner peripheral surface of the protective tube 22 as necessary.

  A plurality of protrusions 16 may be formed on the surfaces of the two divided members 2 and 3 constituting the tubular repair material 1. When a large number of projections 16 are formed on the surfaces of the two divided members 2 and 3 constituting the tubular repair material 1, contact between the inner peripheral surface of the protective tube 22 and the tubular repair material 1 inserted into the protective tube 22. Since the area is reduced and the frictional resistance when the tubular repair material 1 is moved to the other opening side of the protective tube 22 is small, the tubular repair material 1 is inserted into the protective tube 22 and the other opening of the protective tube 22 is opened. It can be easily moved to the part side.

  In this example, since the projection 16 is formed as ribs 17 and 18 formed in the circumferential direction and the axial direction of the divided members 2 and 3, the strength in the circumferential direction and the axial direction of the tubular repair material 1 by the ribs 17 and 18. And the axial rib 18 is formed so as to be higher than the circumferential rib 17, so that the tubular repair material 1 is moved to the other opening side of the protective tube 22. The frictional resistance is small, and the tubular repair material 1 can be inserted into the protective tube 22 and easily moved to the other opening side of the protective tube 22.

  By sequentially repeating the above steps, the tubular repair material 1 is opened from one opening of the protective tube 22 that opens into the manhole 23a while the cable 25 is passed through to the other manhole 23b. Arrange over the opening. And the tubular repair material 1 arrange | positioned in the protective tube 22 is fixed to the protective tube 22 with the appropriate fixing means 24. FIG. As the fixing means 24, for example, an epoxy resin or mortar is injected and fixed between the protective tube 22 and the tubular repair material 1. In this way, the repair of the protective tube 22 in which the cable 25 is laid is completed (FIG. 10).

  By doing in this way, repair of the protective tube 22 in which the cable 25 is laid inside can be repaired without being obstructed by the cable 25 and in the state where the cable 25 is laid. It can be done easily with simple operations.

  In the above-described protective pipe repairing method, the tubular repair material 1 inserted into the protective pipe 22 is moved by being pressed or pulled by human means or mechanical means such as a jack. In order to further facilitate the movement of the tubular repair material 1 inside, a tubular guide body having a conical tip portion may be used.

  11 to 13 show an example of a tubular guide body. FIG. 11 is a perspective view of the tubular guide body. FIG. 12 is an inner surface of one divided member obtained by dividing the tubular guide body shown in FIG. FIG. 13 is a side plan view, and FIG. 13 is an inner side plan view of the other divided member obtained by dividing the tubular guide body shown in FIG. 11 in the axial direction.

  The tubular guide body 26 of the present example has a shape having a conical portion 26b whose diameter decreases toward the distal end at the distal end of the main body 26a having the same diameter as the tubular repair material 1, and is halved in the axial direction. It is composed of two divided members 27 and 28 which are divided into two in the state. The two split members 27 and 28 are connected to the split surfaces 29 and 30 by connecting the split surfaces 29 and 30 of the two split members 27 and 28 together to form a tubular guide body 26, and the connection The structure includes a connecting means 32 for connecting a rear opening end portion of the tubular guide body 26 formed by joining two split members 27 and 28 by means 31 and an opening end portion of the tubular repair material 1. ing.

  In the coupling means 31 for coupling the divided surfaces 29, 30 of the two divided members 27, 28 to form the tubular guide body 26, in this example, the longitudinal direction of the divided surface 29 of one divided member 27 The fitting groove portion 33 is formed on the dividing surface 30 of the other divided member 28, and the protrusion 34 is fitted to the fitting groove portion 33, but is not limited thereto. is not. The fitting groove portion 33 of this example constituting the coupling means 31 has a groove depth wider than the groove opening portion, and the protrusion 34 has a head portion in accordance with the groove shape of the fitting groove portion 33. The groove 34 is wider than the groove opening of the fitting groove 33, and the protrusion 34 is pushed into the fitting groove 33 by using the material deformation of the divided members 27 and 28 to be coupled. Yes.

  Further, the connecting means 32 connects the rear opening end of the tubular guide body 26 formed by connecting the two split members 27 and 28 by the connecting means 31 and the opening end of the tubular repair material 1. Is constituted by a locking groove portion 35 that locks a locking protrusion 15 formed on the outer peripheral surface of the small-diameter outer peripheral portion 11 constituting the connecting means 7 provided in the tubular repair material 1.

  That is, a large-diameter inner peripheral portion 36 having the same diameter as the large-diameter inner peripheral portion 10 of the tubular repair material 1 is formed on the rear opening end side of the tubular guide body 26, and the inner peripheral surface of the large-diameter inner peripheral portion 36. The key is composed of a rectilinear groove 37 and a cross groove 38 having the same configuration as the key-like locking groove portion 14 composed of the rectilinear groove 12 and the cross groove 13 formed in the large-diameter inner peripheral portion 10 of the tubular repair material 1. The locking groove portion 35 is provided in a shape.

  Further, a conical portion 26b at the distal end portion of the main body portion 26a of the tubular guide body 26 is provided with a string passing hole 39 so that the pulling string 40 can be connected (FIGS. 11 and 12). (See FIG. 13).

  The tubular guide body 26 is used as follows. First, in the manhole 23a in which one opening of the protective tube 22 is opened, the cable 25 is inserted into the inside of one split member 27 constituting the tubular guide body 26 from the split opening, and then the split member 27 The dividing surface 30 of the other dividing member 28 is coupled to the dividing surface 29 by the coupling means 31 to form a tubular guide body 26 in which the cable 25 is passed.

  Next, after the cable 25 is inserted from the divided opening into one divided member 2 constituting the tubular repair material 1, the divided surface 5 of the other divided member 3 is coupled to the divided surface 4 of the divided member 2. The tubular repair material 1 in a state in which the cable 25 is passed through the small diameter outer peripheral portion 11 in the direction in which the small diameter outer peripheral portion 11 is inserted into the protective tube 22 is formed by coupling by the means 6, and the small diameter outer peripheral portion 11 of the tubular repair material 1 is formed. The opening end on the side and the rear opening end of the tubular guide body 26 are connected by the connecting means 32. In this state, the tubular repair material 1 is opened into the protective tube 22 with the tubular guide body 26 at the head. Insert from the part.

  Thereafter, the tubular repair material 1 in which the next tubular repair material 1 in the state in which the cable 25 is sequentially passed through the inside in accordance with the process shown in the first example is inserted into the protective tube 22 with one open end portion thereof first is inserted. 1 is connected to the opening end of the first tube by the connecting means 7 and inserted into the protective tube 22 to move the tubular repair material 1 to the other opening side of the protective tube 22, and the cable 25 is passed through the inside. In this state, the tubular repair material 1 is arranged from one opening of the protective tube 22 opening into the manhole 23a to the other opening opening into the next manhole 23b.

  Thus, when the tubular repair material 1 is inserted into the protective tube 22 from one opening with the tubular guide body 26 at the top, even if the protective tube 22 has a curved portion, Since the conical portion 26 b having the guide portion 26 guides the tubular repair material 1 connected to the tubular guide body 26 in a bending direction according to the curved portion of the protection tube 22, the movement of the tubular repair material 1 in the protection tube 22 is made easier. It can be done.

  When the tubular repair material 1 inserted into the protective tube 22 is pulled and moved from the other opening side of the protective tube 22, as shown in FIG. 14, the string provided on the conical portion 26 b of the tubular guide body 26. The tow string 40 is connected to the through hole 39, and the tow string 40 can be pulled and moved from the other opening side of the protective tube 22 as shown in FIG.

  FIG. 16 to FIG. 18 show an example of a flexible tubular repair material used in combination with the tubular repair material in the cable laying protective tube repair method according to the present invention, and FIG. 16 shows a flexible tubular repair material. FIG. 17 is a plan view of the inner surface of one of the divided members obtained by dividing the flexible tubular repair material shown in FIG. 16 in the axial direction. FIG. 18 is a plan view of the flexible tubular repair material shown in FIG. It is an inner surface side top view of the other divided member divided.

  The flexible tubular repair material 41 of this example is composed of two split members 42 and 43 that are split in half in the axial direction. The two divided members 42 and 43 have a flexible structure in the axial direction. As a flexible structure, in this example, the two dividing members 42 and 43 are formed with grooves and ridges alternately extending in the circumferential direction in the circumferential direction, and the dividing surfaces 44 and 43 of the two dividing members 42 and 43 are formed. When 45 is overlapped, a bellows portion 46 is formed, and the bellows portion 46 is structured to have flexibility in the axial direction.

  In addition, the two split members 42 and 43 are connected to the split surfaces 44 and 45 by connecting the split surfaces 44 and 45 of the two split members 42 and 43 to form the flexible tubular repair material 41. And the opening end of the flexible tubular repair material 41 formed by joining the two dividing members 42 and 43 to the both ends in the axial direction by the coupling means 47 and the tubular repair material 1 used in the first example. It has a structure provided with connection means 48 for connecting the opening end.

  In the coupling means 47 for joining the split surfaces 44 and 45 of the two split members 42 and 43 to form the flexible tubular repair material 41, in this example, the split surface 44 of one split member 42 The fitting groove 49 is formed in the longitudinal direction, and the protrusion 50 is formed on the dividing surface 45 of the other dividing member 43 and is fitted to the fitting groove 49, but is not limited thereto. It is not something. The fitting groove portion 49 of the present example constituting the coupling means 47 has a groove depth wider than the groove opening portion, and the protrusion 50 has a head portion in accordance with the groove shape of the fitting groove portion 49. The groove 50 is wider than the groove opening of the fitting groove 49, and the protrusion 50 is pushed into the fitting groove 49 using the material deformation of the divided members 42 and 43 and coupled. Yes.

  Further, in the connecting means 48 for connecting the opening end of the flexible tubular repair material 41 formed by joining the two split members 42 and 43 by the connecting means 47 and the opening end of the tubular repair material 1. Has the same configuration as the connecting means 7 provided in the tubular repair material 1, so that the open end of the flexible tubular repair material 41 and the open end of the tubular repair material 1 can be connected.

  That is, the connecting means 48 of this example also has a large-diameter inner peripheral portion 51 having the same diameter as the large-diameter inner peripheral portion 10 of the tubular repair material 1 on the one opening end side of the flexible tubular repair material 41, A small-diameter outer peripheral portion 52 that can be inserted into the large-diameter inner peripheral portion 10 of the tubular repair material 1 is formed on the other opening side, and on the inner peripheral surface of the large-diameter inner peripheral portion 51, the tubular repair material 1 A key-like locking groove portion 55 formed of a straight advance groove 53 and a cross groove 54 having the same configuration as the key-like lock groove portion 14 formed of the rectilinear groove 12 and the cross groove 13 formed in the large-diameter inner peripheral portion 10 is formed. The outer peripheral surface of the small-diameter outer peripheral portion 52 is formed with a locking projection 56 that can be locked in the locking groove portion 14 of the tubular repair material 1 (FIGS. 16, 17, and 18). reference).

  Next, a protection pipe repairing method with a cable installed in which the protection pipe is repaired by using the flexible tubular repair material 41 configured as described above in combination with the tubular repair material 1 used in the first example is provided in the present invention. A second example of the cable laying protection pipe repairing method will be described with reference to FIGS.

  FIG. 19 shows that after inserting the tubular repair material 1 into which the cable is put into a protective tube buried in the ground, the cable is connected to the inside of one split member 42 constituting the flexible tubular repair material 41 from the split opening. Then, the split surface 45 of the other split member 43 is connected to the split surface 44 of the split member 42 by the connecting means 47 to form the flexible tubular repair material 41, and the flexible tubular repair material 41 is put into the protective tube. FIG. 20 is a longitudinal sectional view showing the step of inserting, and FIG. 20 is a step of moving the tubular repair material 1 inserted into the protective tube to the other opening side of the protective tube by inserting the flexible tubular repair material 41 formed in FIG. FIG. 21 is a longitudinal sectional view showing that the tubular repair material 1 and the flexible tubular repair material 41 are sequentially inserted into the protective tube, and the tubular repair material 1 and the flexible tubular repair material 41 are inserted from one opening of the protective tube. It is a longitudinal cross-sectional view which shows the state arrange | positioned over the other opening part

  As shown in the figure, a protective tube 22 having a cable 25 laid therein is embedded in the ground 21 in a state of being separated by manholes 23a and 23b that stand vertically at predetermined intervals.

  In repairing such a protective tube 22, first, in the manhole 23 a in which one opening of the protective tube 22 opens, one division constituting the tubular repair material 1 is performed in exactly the same manner as in the first example. After the cable 25 is inserted into the inside of the member 2 from the split opening, the split surface 5 of the other split member 3 is connected to the split surface 4 of the split member 2 by the connecting means 6, and the cable 25 is passed through the inside. In this state, the tubular repair material 1 is formed, and the tubular repair material 1 through which the cable 25 is passed is inserted into the protective tube 22 from one opening.

  Next, after the cable 25 is inserted into one split member 42 constituting the flexible tubular repair material 41 from the split opening, the split surface of the other split member 43 is split into the split surface 44 of the split member 42. 45 is coupled by a coupling means 47 to form a flexible tubular repair material 41, and the opening of the tubular repair material 1 in which one open end of the flexible tubular repair material 41 is first inserted into the protective tube 22. After being connected to the end by the connecting means 48, it is inserted into the protective tube 22 (FIG. 19). And the said tubular repair material 1 is moved to the other opening part side of the protection tube 22 by the flexible tubular repair material 41 inserted in the protection tube 22 (FIG. 20).

  Next, one open end of the new tubular repair material 1 formed in the same manner as described above is connected to the open end of the flexible tubular repair material 41 inserted into the protective tube 22 by the connecting means 7, By moving the flexible tubular repair material 41 to the other opening side of the protective tube 22 and repeating the above steps in sequence, the tubular repair material 1 and the flexible tubular repair material with the cable 25 being passed through the inside. 41 are alternately arranged from one opening of the protective tube 22 to the other opening.

  In this example, the tubular repair material 1 and the flexible tubular repair material 41 alternately arranged in the protective tube 22 are alternately arranged for one, but for example, two tubular repair materials 1 are flexible. You may arrange | position alternately with the state where the tubular repair material 41 is one piece.

  The tubular repair material 1 and the flexible tubular repair material 41 arranged in the protective tube 22 as described above are fixed to the protective tube 22 by appropriate fixing means 24. As the fixing means 24, for example, an epoxy resin or mortar is injected and fixed between the protective tube 22 and the tubular repair material 1 and the flexible tubular repair material 41. In this way, the repair of the protective tube 22 in which the cable 25 is laid is completed (FIG. 21).

  When forming the flexible tubular repair material 41, if a sealing agent is applied to the split surfaces 44 and 45 of the split members 42 and 43 to be joined, the two split members 42 and 42 constituting the flexible tubular repair material 41 are provided. 43 can prevent water leakage from between the split surfaces 44 and 45, and also connect the opening end of the tubular repair material 1 to the opening end of the flexible tubular repair material 41. When a sealing agent is applied to the opening end of one and the opening end of the flexible tubular repair material 41, water leakage from between the connected tubular repair material 1 and the flexible tubular repair material 41 can be prevented.

  In order to move the tubular repair material 1 and the flexible tubular repair material 41 inserted from one opening of the protective tube 22 to the other opening side of the protective tube 22, as in the first example, protection is performed. The tubular repair material 1 and the flexible tubular repair material 41 are pressed from one opening side of the pipe 22 by mechanical means such as human power or a jack, or the other repairing pipe 1 and the tubular repair material 1 are possible from the other opening side. Although it pulls the flexible tubular repair material 41, it is not specifically limited. Further, in order to facilitate the movement of the tubular repair material 1 in the protective tube 22, a lubricant may be applied to the inner peripheral surface of the protective tube 22 as necessary.

  By doing in this way, repair of the protective tube 22 in which the cable 25 is laid inside can be repaired without being obstructed by the cable 25 and in the state where the cable 25 is laid. Even if there is a curved portion in the protective tube 22 when the tubular repair material 1 and the flexible tubular repair material 41 are inserted and moved into the protective tube 22, the tubular repair can be performed easily. The flexible tubular repair material 41 arranged between the materials 1 bends according to the curved portion of the protective tube 22, and allows the tubular repair material 1 and the flexible tubular repair material 41 to move smoothly in the protective tube 22. The tubular repair material 1 and the flexible tubular repair material 41 can be reliably arranged from one opening of the protective tube 22 to the other opening.

  In the above-described protective pipe repairing method, the tubular repair material 1 and the flexible tubular repair material 41 inserted into the protective tube 22 are pressed by mechanical means such as human power or a jack, or the tubular repair material 1 is flexible. The tubular repair material 1 and the flexible tubular repair material 41 are pulled from the other opening side of the protection tube 22 into which the tubular repair material 41 is inserted to move in the protection tube 22, but the tubular repair material 1 in the protection tube 22 is moved. In order to make the movement of the flexible tubular repair material 41 even easier, a tubular guide body having a conical tip portion may be used as in the first example.

  Also in this example, the tubular guide body 26 shown in FIGS. 11 to 13 is used as in the first example.

  In this example, the tubular guide body 26 is used as follows. First, as in the first example, the cable 25 is inserted from the divided opening into the inside of one dividing member 27 constituting the tubular guide body 26 in the manhole 23a where one opening of the protective tube 22 opens. After that, the divided surface 30 of the other divided member 28 is coupled to the divided surface 29 of the divided member 27 by the coupling means 31 to form the tubular guide body 26 in the state where the cable 25 is passed through.

  Next, after the cable 25 is inserted from the divided opening into one divided member 2 constituting the tubular repair material 1, the divided surface 5 of the other divided member 3 is coupled to the divided surface 4 of the divided member 2. The tubular repair material 1 in a state in which the cable 25 is passed through the small diameter outer peripheral portion 11 in the direction in which the small diameter outer peripheral portion 11 is inserted into the protective tube 22 is formed. The opening end portion on the side and the rear opening end portion of the tubular guide body 26 are connected by the connecting means 33. In this state, the tubular repair material 1 is opened into the protective tube 22 with the tubular guide body 26 at the head. Insert from the part.

  Next, after the cable 25 is inserted into one split member 42 constituting the flexible tubular repair material 41 from the split opening, the split surface of the other split member 43 is split into the split surface 44 of the split member 42. 45 is coupled by a coupling means 47 to form a flexible tubular repair material 41, and the opening of the tubular repair material 1 in which one open end of the flexible tubular repair material 41 is first inserted into the protective tube 22. After being connected to the end by the connecting means 48, it is inserted into the protective tube 22.

  Thereafter, the next tubular repair material 1 and the flexible tubular repair material 41 in the state where the cable 25 is sequentially passed through the inside in accordance with the steps shown in the second example are alternately inserted into the protective tube 22, The tubular repair material 1 and the flexible tubular repair material 41 are moved to the other opening side of the protective tube 22, and the tubular repair material 1 and the flexible tubular repair material 41 are manholed while the cable 25 is passed through the inside. It arrange | positions ranging from one opening part of the protective tube 22 opened in 23a to the other opening part opened in the next manhole 23b.

  As described above, when the tubular repair material 1 and the flexible tubular repair material 41 are inserted into the protective tube 22 from one opening portion with the tubular guide body 26 at the head, the tubular shape is tubular even if the protective tube 22 has a curved portion. Since the conical portion 26b at the tip of the guide body 26 guides the tubular repair material 1 and the flexible tubular repair material 41 connected to the tubular guide body 26 in accordance with the curved portion of the protection tube 22, it is protected. The movement of the tubular repair material 1 and the flexible tubular repair material 41 in the pipe 22 can be further facilitated.

  When the tubular repair material 1 and the flexible tubular repair material 41 inserted into the protective tube 22 are pulled and moved from the other opening side of the protective tube 22, as shown in FIG. As shown in FIG. 22, the tow string 40 is pulled from the other opening side of the protective tube 22 as shown in FIG. 22 by connecting the tow string 40 to the string through hole 39 provided in the portion 26b. Can be moved.

The perspective view which shows an example of the tubular repair material used with the cable laying protection pipe repair method which concerns on this invention. The inner surface side top view of one division member which divided the tubular repair material shown in FIG. 1 into the axial direction. The inner surface side top view of the other division member which divided the tubular repair material shown in FIG. 1 into the axial direction. The AA line expanded sectional view of FIG. It is another example of the connection means of the tubular repair material shown in FIG. 1, Comprising: The inner surface top view of one division member which divided the tubular repair material into 2 in the axial direction. FIG. 1 is a cross-sectional view showing another example of the tubular repair material. The top view which shows the other example of the tubular repair material in which protrusion was formed in the surface. In the first example of the cable laying protection pipe repairing method according to the present invention, from the split opening to the inside of one split member constituting the tubular repair material on the one opening side of the protective pipe buried in the ground After inserting the cable, the step of joining the split surface of the other split member to the split surface of the split member to form a tubular repair material, and inserting the tubular repair material into the protective tube from one opening FIG. The longitudinal cross-sectional view which shows the process of moving the tubular repair material inserted in the protective tube to the other opening part side of a protective tube by insertion of the following tubular repair material. The longitudinal cross-sectional view which shows the state which inserted the tubular repair material in the protective tube sequentially, and has arrange | positioned the tubular repair material from one opening part of the protective tube to the other opening part. The perspective view which shows an example of the tubular guide body used with the cable laying protection pipe repair method which concerns on this invention. The inner surface side top view of one division member which divided the tubular guide body shown in FIG. 11 into the axial direction. The inner surface side top view of the other division member which divided the tubular guide body shown in FIG. 11 into 2 in the axial direction. The perspective view which shows the state which connected the pulling string to the tubular guide body. In the first example of the cable laying protection tube repairing method according to the present invention, a state where the tubular guide body is used and the traction string is pulled and moved from the other opening side of the protection tube into which the tubular repair material is inserted is shown. Illustration. The perspective view which shows an example of the flexible tubular repair material used in addition to the said tubular repair material by the cable laying protection pipe repair method which concerns on this invention. FIG. 17 is a plan view of the inner surface of one divided member obtained by dividing the flexible tubular repair material shown in FIG. 16 into two in the axial direction. The inner surface side top view of the other division member which divided the flexible tubular repair material shown in FIG. 16 into the axial direction. In the second example of the cable laying protection pipe repairing method according to the present invention, after inserting the tubular repair material in which the cable is put into the protection pipe embedded in the ground, one division constituting the flexible tubular repair material The cable is inserted into the inside of the member from the split opening, and the split surface of the other split member is joined to the split surface of the split member to form a flexible tubular repair material, and the flexible tubular repair material is placed in the protective tube. The longitudinal cross-sectional view which shows the process inserted in. The longitudinal cross-sectional view which shows the process of moving the tubular repair material inserted in the protective tube to the other opening part side of a protective tube by insertion of a flexible tubular repair material. A state in which the tubular repair material and the flexible tubular repair material are alternately inserted into the protective tube in sequence, and the tubular repair material and the flexible tubular repair material are arranged from one opening to the other opening of the protective tube. FIG. In the second example of the cable laying protection pipe repairing method according to the present invention, the tubular guide body is used and the pulling string is pulled and moved from the other opening side of the protection pipe into which the tubular repair material is inserted. Illustration.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tubular repair material 2 Dividing member 3 Dividing member 4 Dividing surface 5 Dividing surface 6 Coupling means 7 Connecting means 8 Fitting groove part 9 Projection part 10 Large diameter inner peripheral part 11 Small diameter outer peripheral part 12 Straight groove 13 Crossing groove 14 Locking groove part 15 Locking projection 16 Projection 17 Rib 18 Rib 19 Female screw 20 Male screw 21 Ground 22 Protective tube 23a, 23b Manhole 24 Fixing means 25 Cable 26 Tubular guide body 26a Main body 26b Conical part 27 Dividing member 28 Dividing member 29 Dividing surface 30 Dividing Surface 31 Coupling means 32 Connection means 33 Fitting groove 34 Projection 35 Locking groove 36 Large-diameter inner periphery 37 Straight groove 38 Crossing groove 39 String through hole 40 Tow string 41 Flexible tubular repair material 42 Dividing member 43 Dividing Member 44 Dividing surface 45 Dividing surface 46 Bellows portion 47 Coupling means 48 Connecting means 49 Fitting groove portion 50 Projection portion 51 Large diameter inner peripheral portion 52 Small diameter outer peripheral portion 53 Straight advance groove 54 Samizo 55 engaging the groove 56 the locking projection

Claims (5)

A cable installed protective tube repairing method for repairing a protective tube in which a cable is installed inside using a tubular repair material,
The tubular repair material is composed of two divided members divided in the axial direction, and the two divided members are joined to the divided surfaces by joining the divided surfaces of the two divided members to form a tubular repair material. And a connecting means for connecting the opening ends of the tubular repair material formed by joining the two dividing members by the coupling means to both ends in the axial direction.
After the cable is inserted from the divided opening into one divided member constituting the tubular repair material on one opening side of the protective tube, the divided surface of the other divided member is coupled to the divided surface of the divided member A tubular repair material is formed by joining by means, and the tubular repair material is inserted into the protective tube from one opening,
After that, after the cable is put into one split member constituting the tubular repair material on the one opening side of the protective tube, the split surface of the other split member is split into the split surface of the split member. To form a tubular repair material, one opening end of the tubular repair material is connected to the opening end of the tubular repair material previously inserted into the protective tube by a connecting means, and then the tubular repair material is Insert into the protective tube and move the tubular repair material to the other opening side of the protective tube,
The tubular repair material is arranged from one opening to the other opening of the protective tube in a state in which the cable is passed through by repeating the above steps sequentially.   The cable laid protective tube repair method according to claim 1, wherein a plurality of protrusions are formed on the surfaces of the two divided members constituting the tubular repair material.   The cable laying according to claim 2, wherein the protrusions formed on the surfaces of the two split members constituting the tubular repair material are ribs formed in the circumferential direction and / or the axial direction of the split members. Protected pipe repair method.   When the split surface of the other split member is joined to the split surface of one split member constituting the tubular repair material by the joining means, and the split surface of the other split member is joined to the split surface of the split member. When connecting one open end of the tubular repair material to the open end of the tubular repair material previously inserted into the protective tube by the connecting means, the split surface of the split member to be joined and the opening of the tubular repair material to be connected 4. The protective method for repairing a protective tube with a cable installed according to claim 1, wherein a sealing agent is applied to the end portion. The cable laid protective tube repair method according to claim 1, 2, 3, or 4, wherein a protective tube having a cable laid therein is repaired by using a flexible tubular repair material together with the tubular repair material. ,
The flexible tubular repair material is composed of two divided members divided in the axial direction, the two divided members have a flexible structure in the axial direction, and two divided members are formed on the divided surface of the two divided members. A coupling means for joining the divided surfaces of the members to form a flexible tubular repair material, and an open end of the flexible tubular repair material formed by joining two divided members by the joining means at both ends in the axial direction And a connection means for connecting the opening end of the tubular repair material,
After the cable is put into one of the split members constituting the flexible tubular repair material from the split opening, the split surface of the other split member is coupled to the split surface of the split member by a coupling means. A tubular repair material is formed, and one open end of the flexible tubular repair material is connected to the open end of the tubular repair material previously inserted into the protective tube by a connecting means, and the flexible tubular repair material is Insert into the protective tube and move the tubular repair material to the other opening side of the protective tube,
One open end of the new tubular repair material is connected to the open end of the flexible tubular repair material inserted into the protective tube by connecting means, and the flexible tubular repair material is moved to the other open side of the protective tube. Let
By sequentially repeating the above steps, the tubular repair material and the flexible tubular repair material are alternately arranged from one opening portion of the protective tube to the other opening portion while the cable is passed through the inside. A protective method for repairing pre-installed protective tubes.

Images