JP2005288786A - Method for repairing protective pipe with cable placing finished - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for repairing a protective pipe with cable placing finished which can repair the protective pipe while the cable is placed in the inside. <P>SOLUTION: While a lining sheet 6 is supplied from one opening side of the protective pipe 2, the cable placed in the protective pipe is packaged, and tubular forming is carried out. Both ends in the width direction of the tubular lining sheet 6 are connected with each other to form a lining sheet tube 9, and the obtained tube 9 is moved into the protective pipe 2. When the lining sheet tube 9 can be arranged over a range from one opening of the protective pipe 2 to the other opening, the lining sheet tube 9 is inflated to be fixed to the inner surface of the protective pipe 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  There is known a repair method for a steel pipe or the like in which a tubular lining material is fixed and repaired on the inner surface of the steel pipe or the like buried underground.

In this method, a cylindrical lining material formed of a flexible material impregnated or coated with a thermosetting resin, a photocurable resin, or a room temperature curable resin is disposed inside a pipe line, and this cylindrical lining is provided. The material is inflated with water pressure or air pressure and pressed against the inner surface of the pipeline, and the lining is cured by curing the curable resin by passing hot water, steam, or irradiating ultraviolet rays into the tubular lining material. (For example, refer to Patent Document 1).
Japanese Patent Publication No. 7-4853

  However, the above-described repairing method for steel pipes and the like can be applied if there is no obstruction inside, but when the cable is laid, there is a problem that it cannot be applied because the cable is in the way. For example, power cables, telephone lines, and other cables have conventionally been widely installed by placing them in protective pipes buried in the ground. If it is not possible to apply it, the cable must be removed from the protective tube, which is very troublesome.

  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 while the cable is still laid.

  The method of the present invention for achieving the above object is as follows.

  The invention according to claim 1 is a cable laid protective pipe repairing method for repairing a protective pipe in which a cable is laid inside, while supplying a lining sheet from one opening side of the protective pipe. Forming into a tubular shape while wrapping the cable and moving the lining sheet tube obtained while forming a lining sheet tube by interconnecting both ends in the width direction of the tubular lining sheet, The lining sheet tube is inflated and fixed to the inner surface of the protective tube when the lining sheet tube can be disposed from one opening to the other opening of the protective tube.

  The invention according to claim 2 is a method for repairing a protective tube having a cable installed therein, in which the protective tube having a cable installed therein is repaired, while supplying a lining sheet from one opening side of the protective tube. Forming into a tubular shape while wrapping the cable and moving the lining sheet tube obtained while forming a lining sheet tube by interconnecting both ends in the width direction of the tubular lining sheet, The lining sheet tube is disposed from one opening portion of the protective tube to the other opening portion, and the airtightly sealed in the lining sheet tube disposed in the protective tube from one opening portion of the protective tube to the other opening portion. Alternatively, a flexible tube made of a liquid-tight material is pulled in, and the tube is expanded to bring the lining sheet tube into contact with the inner surface of the protective tube. Fixing the lining sheet tube to the inner surface of the protective tube in this state, then, it is characterized by removing the tube.

  The invention according to claim 3 is a method for repairing a protective tube having a cable installed therein, in which the protective tube having a cable installed therein is repaired, wherein the lining sheet and the airtight or liquid from one opening side of the protective tube are provided. While supplying a flexible tube formed of a dense material, the cable and the tube are wrapped with the lining sheet and formed into a tubular shape, and both ends in the width direction of the tubular lining sheet are connected to each other. The lining sheet tube obtained while forming the lining sheet tube and the tube encased in the lining sheet tube are moved together into the protective tube so as to extend from one opening of the protective tube to the other opening. The lining sheet tube and the tube are arranged, and the tube is inflated to connect the lining sheet tube to the inner surface of the protective tube. Brought into contact, to fix the lining sheet tube to the inner surface of the protective tube in this state, then, it is characterized by removing the tube.

  According to a fourth aspect of the present invention, the lining sheet according to the first, second, or third aspect is formed of a flexible sheet impregnated or coated with an uncured curable resin. Features.

  In the first aspect of the present invention, the lining sheet is formed from the one opening side of the protective tube while forming the tube while wrapping the cable, and both ends in the width direction of the tubular lining sheet are connected to each other. The lining sheet tube is obtained when the lining sheet tube obtained by forming the lining sheet tube is moved into the protective tube and the lining sheet tube can be arranged from one opening to the other opening of the protective tube. Therefore, even if a cable is laid inside the protective tube, the protective tube can be easily repaired without being obstructed by the cable.

  In the invention of claim 2, the lining sheet is formed from the one opening side of the protective tube while forming the tube while wrapping the cable, and both ends in the width direction of the tubular lining sheet are connected to each other. The lining sheet tube obtained while forming the lining sheet tube was moved into the protective tube, and the lining sheet tube was disposed from one opening to the other opening of the protective tube, and was disposed in the protective tube. A flexible tube made of an air-tight or liquid-tight material is drawn into the lining sheet tube, and the tube is inflated to bring the lining sheet tube into contact with the inner surface of the protective tube. In this state, the lining sheet tube is protected. The cable is fixed to the inner surface of the tube, and then the tube is removed. Repair of cable installation already protective tube can be easily performed without being obstructed by the. Moreover, even if no means for airtight or liquid-tightening the connecting portion of the lining sheet tube is provided, the tube is inflated to bring the lining sheet tube into contact with the inner surface of the protective tube, and in this state the lining sheet tube Is fixed to the inner surface of the protective tube, so that the lining sheet tube can be fixed to the inner surface of the protective tube easily and reliably.

  In the invention according to claim 3, the lining sheet and the flexible tube formed of an airtight or liquid-tight material are supplied from one opening side of the protective tube, and the cable and the tube are connected with the lining sheet. The lining sheet tube obtained by forming the lining sheet tube by forming the lining sheet tube by forming both ends of the lining sheet in the tubular shape while wrapping and forming both ends in the width direction of the tubular lining sheet is encased in the lining sheet tube The tube is integrally moved into the protective tube, the lining sheet tube and the tube are arranged from one opening of the protective tube to the other opening, the tube is expanded, and the lining sheet tube is connected to the protective tube. In this state, the lining sheet tube is fixed to the inner surface of the protective tube, and then the tube is removed. Since employ a method other than, it is possible to easily repair the cable installation already protective tube without cable inside the protective tube is obstructed by the cable be laid. Moreover, even if no means for airtight or liquid-tightening the connecting portion of the lining sheet tube is provided, the tube is inflated to bring the lining sheet tube into contact with the inner surface of the protective tube, and in this state the lining sheet tube Is fixed to the inner surface of the protective tube, so that the lining sheet tube can be fixed to the inner surface of the protective tube easily and reliably. Furthermore, since the lining sheet and the tube are integrally moved into the protective tube and arranged in the protective tube, the working time can be shortened.

  In the invention according to claim 4, the lining sheet according to claim 1, 2, or 3 is formed of a flexible sheet impregnated or coated with an uncured curable resin, Since the curable resin is cured and the lining sheet tube is fixed to the inner surface of the protective tube, the lining sheet tube can be easily and reliably fixed to the inner surface of the protective tube.

  An example of the best mode for carrying out the repairing method for a cable laid protective tube according to the present invention will be described.

  FIG. 1 to FIG. 8 show a first example of a repair method for a cable laid protective tube according to the present invention. FIG. 1 shows a cable wrapped at one opening side of a protective tube buried in the ground. FIG. 2 is a partially cutaway plan view of FIG. 1, FIG. 3 is a sectional view of the main part of FIG. 1, and FIG. 4 is a view of the lining sheet. FIG. 5 is a longitudinal sectional view showing a step of inflating a lining sheet pipe in a protective pipe embedded in the ground, FIG. 6 is a partially cutaway plan view of FIG. 7 is a left side view of the main part of FIG. 5, and FIG. 8 is a longitudinal sectional view of a disassembled state of the split plug plug attached to the lining sheet tube.

  As shown in the figure, a protective tube 2 is buried in the ground 1 in a state of being separated by a manhole 3 standing vertically at a predetermined interval. A cable 4 such as an optical fiber cable is laid in the protective tube 2.

  In repairing the protective tube 2 having such a cable installed, as shown in FIG. 1, the roll stand 5 is installed on the ground portion of one manhole 3a. The roll stand 5 rotatably supports a sheet roll 7 around which a lining sheet 6 formed in a strip shape having a width corresponding to the inner diameter of the protective tube 2 is wound. The lining sheet 6 has, for example, a three-layer structure of an impermeable inner film layer, a resin adsorbing inner layer impregnated with a curable resin, and an impermeable outer film layer. Examples of the curable resin include a thermosetting resin, a photocurable resin, and a room temperature curable resin, which are impregnated with felt to form a resin-absorbing inner layer. In addition, a polyurethane film is used as the impermeable inner film layer and a polyethylene film is used as the impermeable outer film layer, but the present invention is not limited to this.

  Both sides in the width direction of the lining sheet 6 are appropriately connected by connecting means to be formed into a tubular shape. As such an appropriate connecting means, a connecting tool 8 such as a fastener or a double-sided adhesive tape may be provided on both sides of the lining sheet 6, and adhesive bonding or heat fusion, sewing, hooking or hooking or the like may be used. It may be a lock or a composite of these. Moreover, in this example, the connection of the both sides in the width direction of the lining sheet 6 needs to be connected in an airtight or liquid-tight state. There is no particular limitation on the means for airtight or liquid-tightening the connecting portions on both sides in the width direction of the lining sheet 6. In this example, a fastener is used as the connector 8. A hook-and-loop fastener is suitable as the fastener.

  In this example, as shown in FIGS. 1 to 4, the lining sheet 6 is supplied from the upper part of the manhole 3 a into the manhole 3 a while forming the tube while wrapping the cable 4, and the tubular lining sheet 6 in the width direction is formed. Both ends are connected to each other by a connecting tool 8 to form a lining sheet tube 9. An annular two-part split pulling jig 10 is connected to the tip of the obtained lining sheet tube 9. The two split pulling jig 10 is annularly connected by a binding band 11 with the cable 4 being passed through the inside. The front end of the lining sheet tube 9 is fitted on the outer periphery of the rear end of the split pulling jig 10 and fixed with a sheet binding band 12. The rear end of the pulling rope 13 is connected to the front end of the split splitting jig 10. The pulling rope 13 passes through the inside of the protective tube 2 and the tip thereof is pulled by the next manhole 3b.

  Thus, by pulling the pulling rope 13 from the manhole 3b side while forming the lining sheet tube 9, the resulting lining sheet tube 9 is moved into the protective tube 2, and the protective tube 2 opened to the manhole 3a The lining sheet tube 9 is arranged from one opening to the other opening that opens to the manhole 3b.

  At this time, in order to facilitate the movement of the lining sheet tube 9 in the protective tube 2, a lubricant or water may be used.

  In this way, at the stage where the lining sheet tube 9 can be arranged from one opening to the other opening of the protective tube 2, the tip of the unformed lining sheet 6 is separated from the lining sheet tube 9, and 2 The split pulling jig 10 is removed.

  Next, two split plugs 14 are respectively attached to both ends of the lining sheet tube 9 on the manholes 3a and 3b side as shown in FIGS. The split plug plug 14 has a split bottomed annular member 14a, and the bottom of the bottomed annular member 14a is fitted into the outer periphery of the cable 4 to seal the cable penetration portion. A seal member 14b is attached, and a fluid circulation pipe portion 14c is projected from the outer periphery of the split bottomed annular member 14a. Such a split plug 14 is bound by a plug binding band 15. The lining sheet tube 9 is fitted around the opening-side outer periphery of the bottomed annular member 14 a and fixed by the sheet binding band 16.

  With the two plug plugs 14 attached to both ends of the lining sheet tube 9 as shown in the figure, air is sent from the fluid circulation tube portion 14c, and the lining sheet tube 9 is inflated to adhere to the inner surface of the protective tube 2.

  In this state, when the curable resin impregnated or applied to the lining sheet 6 is a thermosetting resin, hot air, high-temperature hot water or steam is sent from the fluid circulation pipe portion 14c, and the curable resin is light When it is a curable resin, it is irradiated with ultraviolet rays from the fluid flow pipe portion 14c. When the curable resin is a room temperature curable resin, it is left for a certain period of time, and the uncured thermosetting of the lining sheet tube 9 is performed. The resin is cured and fixed to the inner surface of the protective tube 2.

  When the lining sheet tube 9 is fixed to the inner surface of the protective tube 2 in this way, hot air, high-temperature hot water or steam is fed from the fluid circulation tube portion 14c, or ultraviolet irradiation is stopped, and 2 at both ends of the lining sheet tube 9 are stopped. The split plug 14 is removed, and the repair of the protective tube 2 is completed.

  By doing in this way, repair of the protective tube 2 in which the cable 4 is laid inside can be performed with the lining sheet tube 9.

  FIGS. 9 to 16 show a second example of the method for repairing a cable laying protective tube according to the present invention, and FIG. 9 is arranged in the protective tube from one opening to the other opening of the protective tube. FIG. 10 is a cross-sectional view of the main part of FIG. 9, FIG. 11 is a vertical cross-sectional view showing another example of the process of drawing the tube into the lining sheet tube, and FIG. 12 is a lining. FIG. 13 is a longitudinal sectional view showing a step of inflating the tube drawn into the lining sheet tube, FIG. 14 is an enlarged sectional view taken along line AA in FIG. 13, and FIG. 13 is an enlarged sectional view taken along line BB in FIG. 13, and FIG. 16 is an enlarged sectional view taken along line CC in FIG.

  In this example, when repairing the protective tube 2 in which the cable 4 is laid, first, a tubular sheet is formed while wrapping the cable 4 while supplying the lining sheet 6 from one opening side of the protective tube 2. The lining sheet tube 9 obtained while forming the lining sheet tube 9 by connecting both ends in the width direction of the tubular lining sheet 4 together is moved into the protective tube 2, and The lining sheet tube 9 is arranged from one opening to the other opening.

  This operation is performed by the same process as the process shown in FIGS. 1 to 4 of the first example described above, and the explanation of this example will be made with reference to FIGS. 1 to 4 of the first example and the description thereof. Is omitted.

  Similarly to the lining sheet 6 used in the first example, the lining sheet 6 used in this example includes, for example, an impermeable inner film layer, a resin adsorbing inner layer impregnated with a curable resin, and an impermeable outer film layer. The resin has a three-layer structure, and examples of the curable resin include a thermosetting resin, a photocurable resin, and a room temperature curable resin, which are impregnated with felt to form a resin-absorbing inner layer.

  In this example, both sides in the width direction of the lining sheet 6 are appropriately connected by connecting means to be formed into a tubular shape. As such an appropriate connecting means, there is no difference from the first example, and a connecting tool 8 such as a fastener or a double-sided adhesive tape may be provided on both sides of the lining sheet 6, and adhesive bonding or heat fusion, It may be sewn or locked by a hook or hook, or may be a combination of these.

  Further, in the first example, the connection of both sides in the width direction of the lining sheet 6 needs to be connected in an airtight or liquid tight state, but in this example, it is connected in an airtight or liquid tight state. I don't need it. Therefore, in this example, the connecting structure on both sides in the width direction of the lining sheet 6 is simpler than in the first example.

  Next, the tube 17 is drawn into the lining sheet tube 9 from one opening of the protective tube 2 in which the lining sheet tube 9 is disposed to the other opening.

  As shown in FIG. 9, the tube 17 is wound around a roll stand 18 installed on the ground portion of one manhole 3 a and can be fed out from the roll stand 18. The rope 19 is connected, the pulling rope 19 is passed through the lining sheet tube 9, the pulling rope 19 is pulled by the next manhole 3 b, and the tube 17 is pulled into the lining sheet tube 9.

  The tube 17 is not particularly limited as long as it is flexible and formed of an airtight or liquid tight material. However, when the tube 17 is inflated, it has a diameter that presses against the inner peripheral surface of the protective tube 2. It is necessary to be.

  The means for pulling the tube 17 into the lining sheet tube 9 is not limited to the above means, and as shown in FIG. 11, the front end of the tube 17 is closed and the opening at the rear end of the protective tube 2 is closed. From the state fixed to one opening, air is fed into the tube 17, and the tube 17 is reversed, and the tip of the tube 17 is advanced to the other opening side of the protective tube 2, whereby the tube 17 is inserted into the lining sheet tube 9. You may make it pull in.

  9 and 11 showing the process of drawing the tube 17 into the lining sheet tube 9, the lining sheet tube 9 previously disposed in the protective tube 2 is in contact with the inner surface of the protective tube 2. Although this is shown, this is shown for convenience in order to make it easier to understand the drawing of the tube 17 into the lining sheet tube 9. In reality, the lining sheet tube 9 is not attached to the inner surface of the protective tube 2. It is not in contact and is in a bent state.

  After the tube 17 has been drawn into the lining sheet tube 9 as described above, a cylindrical plug having one end opened and the other closed at both ends of the tube 17 on the manholes 3a and 3b side as shown in FIG. Each plug 20 is attached.

  The plug plug 20 has a fluid circulation pipe portion 21 on its cylindrical wall. The plug plug 20 has a fitting groove 22 into which the cable 4 is fitted in the longitudinal (axial) direction of the cylindrical wall. Further, the plug plug 20 is formed in the same shape as the fitting groove 22, and is fitted so as to overlap the fitting groove 22, and as will be described later, a tube pressing plate 23 for holding the tube 17, and a plug plug. A protective cover 24 having the same curvature as the outer periphery of the cover 20 and covering the opening of the fitting groove 22 and protecting the cable 4 fitted in the fitting groove 22 in a state where the cable 4 is fitted in the fitting groove 22. I have.

  When attaching such plug plugs 20 to both ends of the tube 17, both ends of the tube 17 are fitted to the outer periphery of the plug plug 20, and the tube pressing plate 23 is fitted to the fitting groove 22 of the plug plug 20. The tube 17 is pressed so as to be sandwiched between the wall of the fitting groove 22 of the plug plug 20. Then, the cable 4 is fitted into the fitting groove 22 into which the tube pressing plate 23 is fitted, and the opening of the fitting groove 22 is covered with the protective cover 24 from above, and is bound with the binding bands 25 and 26 from above. Attached. Thus, the tube 17 is closely fitted and fixed to the plug plug 20 (see FIGS. 13 to 16).

  In this way, when the plugs 20 are attached to both ends of the tube 17 on the manholes 3a and 3b side, air is fed from the fluid flow pipe portion 21, the tube 17 is expanded, and the lining sheet tube 9 is connected to the protective tube 2. Adhere to the inner surface.

  In this state, when the curable resin impregnated or applied to the lining sheet 6 is a thermosetting resin, hot air, high-temperature hot water or steam is fed into the tube 17 from the fluid circulation pipe portion 21 and cured. When the curable resin is a photocurable resin, the fluid circulation pipe portion 21 is irradiated with ultraviolet rays. When the curable resin is a room temperature curable resin, the resin is left for a certain period of time and the lining sheet tube 9 is not cured. The thermosetting resin is cured and fixed to the inner surface of the protective tube 2.

  When the lining sheet tube 9 is fixed to the inner surface of the protective tube 2 in this way, hot air, high-temperature hot water or steam is sent from the fluid circulation tube portion 21 or ultraviolet irradiation is stopped, and the inner surface of the protective tube 2 is fixed. By removing the tube 17 from the lining sheet tube 9, the repair of the protective tube 2 is completed.

  By doing in this way, repair of the protective tube 2 in which the cable 4 is laid inside can be performed with the lining sheet tube 9.

  FIGS. 17 to 19 show a third example of the method for repairing a cable laid protective tube according to the present invention. FIG. 17 shows a protective tube while supplying a lining sheet and a tube from one opening side of the protective tube. Forming a lining sheet tube by forming a lining sheet tube by wrapping a cable and a tube with a lining sheet on one opening side of the lining sheet, and moving the lining sheet tube and the tube together to the other opening side of the protective tube 18 is a partially cutaway plan view of FIG. 17, and FIG. 19 is a cross-sectional view of the main part of FIG.

  In this example, the roll stand 5 is installed on the ground portion of one manhole 3a as in the first example. The roll stand 5 rotatably supports a sheet roll 7 around which a lining sheet 6 formed in a strip shape having a width corresponding to the inner diameter of the protective tube 2 is wound.

  Similarly to the lining sheet 6 used in the first example, the lining sheet 6 used in this example includes, for example, an impermeable inner film layer, a resin adsorbing inner layer impregnated with a curable resin, and an impermeable outer film layer. The resin has a three-layer structure, and examples of the curable resin include a thermosetting resin, a photocurable resin, and a room temperature curable resin, which are impregnated with felt to form a resin-absorbing inner layer.

  In this example, both sides in the width direction of the lining sheet 6 are appropriately connected by connecting means to be formed into a tubular shape. As such an appropriate connecting means, there is no difference from the first example, and a connecting tool 8 such as a fastener or a double-sided adhesive tape may be provided on both sides of the lining sheet 6, and adhesive bonding or heat fusion, It may be sewn or locked by hooks or hooks, or a combination of these.

  Further, in the first example, the connection of both sides in the width direction of the lining sheet 6 needs to be connected in an airtight or liquid-tight state, but in this example, as in the second example, the airtight or liquid-tight state is required. It does not need to be linked to a state. Therefore, in this example, the connecting structure on both sides in the width direction of the lining sheet 6 is simpler than in the first example.

  Furthermore, in this example, the tube 17 is wound around the roll stand 18 installed in the above-ground part of the manhole 3a, and can be drawn out from the roll stand 18. As in the second example, the tube 17 is not particularly limited to the material as long as it has flexibility formed of an airtight or liquid-tight material. However, when the tube 17 is inflated, The diameter needs to be in pressure contact with the inner peripheral surface.

  In this example, the lining sheet 6 and the tube 17 are fed out to one opening side of the protective tube 2 and formed into a tubular shape while wrapping the cable 4 and the tube 17 with the lining sheet 6, and in the same manner as in the first example, the tubular shape is formed. Both ends of the lining sheet 6 in the width direction are connected to each other by a connector 8 to form a lining sheet tube 9. In the same manner as in the first example, an annular split pulling jig 10 is connected to the tip of the obtained lining sheet tube 9 and the tip of the tube 17 is connected. The split splitting jig 10 is connected in an annular shape by a binding band 11 with the cable 4 being passed through. The front end of the lining sheet tube 9 is fitted to the outer periphery of the rear end of the split traction jig 10 and fixed with a sheet binding band 12, and the front end of the tube 17 is split into two halves with an appropriate fastener. 10 is fixed. The rear end of the pulling rope 13 is connected to the front end of the split splitting jig 10. The pulling rope 13 passes through the inside of the protective tube 2 and the tip thereof is pulled by the next manhole 3b.

  Thus, by pulling the pulling rope 13 from the manhole 3b side while forming the lining sheet tube 9 so as to wrap the cable 4 and the tube 17 with the lining sheet 6, the obtained lining sheet tube 9 and the tube 17 are integrated. The lining sheet tube 9 and the tube 17 are arranged from one opening of the protective tube 2 opened to the manhole 3a to the other opening opened to the manhole 3b. By doing in this way, the lining sheet pipe | tube 9 and the tube 17 can be arrange | positioned in the protective pipe 2 by one process.

  At this time, in order to facilitate the movement of the lining sheet tube 9 in the protective tube 2, a lubricant or water may be used.

  In this way, at the stage where the lining sheet tube 9 can be arranged from one opening to the other opening of the protective tube 2, the tip of the unformed lining sheet 6 is separated from the lining sheet tube 9, and 2 The split pulling jig 10 is removed.

  After the lining sheet tube 9 and the tube 17 are arranged in the protective tube 2 as described above, the tube 17 is then inflated to bring the lining sheet tube 9 into contact with the inner surface of the protective tube 2. Then, the lining sheet tube 9 is fixed to the inner surface of the protective tube 2, and then the tube 17 is removed. Thereby, the repair of the protective tube 2 is completed. .

  This work is performed by the same process as the process shown in FIGS. 13 to 16 of the second example described above, and the description of this example will be made with the aid of FIGS. 13 to 16 of the second example and the description thereof. Is omitted.

  By doing in this way, repair of the protective tube 2 in which the cable 4 is laid inside can be performed with the lining sheet tube 9.

  In this example, the repair of the protective tube 2 buried in the ground of the ground 1 is described. However, the present invention is not limited to the one buried in the ground, but a protective tube disposed on the ground. Needless to say, this also applies to repairs.

In an example of a repair method for a cable laying protection tube according to the present invention, a step of forming a lining sheet tube by forming a lining sheet into a tubular shape while wrapping a cable on one opening side of the protection tube embedded in the ground FIG. FIG. 2 is a partially cutaway plan view of FIG. 1. FIG. 2 is a main part sectional view of FIG. 1. The perspective view which shows the state which forms a lining sheet into a tubular shape. The longitudinal cross-section which shows the process of inflating a lining sheet pipe | tube in the protective pipe embed | buried in the ground. FIG. 6 is a partially cutaway plan view of FIG. 5. The left view of the principal part of FIG. The longitudinal cross-section of the decomposition | disassembly state of the split plug plug attached to a lining sheet pipe | tube. The longitudinal cross-sectional view which shows the process of drawing in a tube in the lining sheet | seat pipe | tube arrange | positioned in the said protective tube ranging from one opening part of a protective tube to the other opening part. FIG. 10 is a cross-sectional view of the main part of FIG. 9. The longitudinal cross-sectional view which shows the other example of the process of drawing in a tube in a lining sheet pipe | tube. The perspective view which shows the state which pulled in the tube in the lining sheet pipe | tube. Longitudinal sectional view showing the process of inflating the tube drawn into the lining sheet tube FIG. 14 is an enlarged sectional view taken along line AA in FIG. 13. The BB expanded sectional view of FIG. FIG. 14 is an enlarged sectional view taken along line CC in FIG. 13. While supplying the lining sheet and tube from one opening side of the protective tube, forming the lining sheet tube by forming into a tubular shape while wrapping the cable and tube with the lining sheet on one opening side of the protective tube, The longitudinal section which shows the process of moving a lining sheet pipe and a tube to the other opening side of a protection pipe as one. FIG. 18 is a partially cutaway plan view of FIG. 17. FIG. 18 is an essential part cross-sectional view of FIG. 17.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Protective tube 3a, 3b Manhole 4 Cable 5 Roll stand 6 Lining sheet 7 Sheet roll 8 Connection tool 9 Lining sheet tube 10 Split pulling jig 11 Binding band 12 Sheet binding band 13 Pulling rope 14 Split plug Plug 14a Two-piece bottomed annular member 14b Two-piece seal member 14c Fluid flow pipe part 15 Plug bundling band 16 Sheet bundling band 17 Tube 18 Roll stand 19 Pull rope 20 Plug plug 21 Fluid flow pipe part 22 Fitting groove 23 Tube retainer plate 24 Protective cover 25, 26 Cable tie

Claims (4)

A cable laying protection pipe repair method for repairing a protection pipe with a cable laid inside,
A lining sheet is formed by wrapping the cable while supplying the lining sheet from one opening side of the protective tube, and connecting the both ends in the width direction of the tubular lining sheet to each other. The lining sheet tube thus obtained is moved into the protective tube, and the lining sheet tube is inflated at a stage where the lining sheet tube can be arranged from one opening of the protective tube to the other opening. A method for repairing a protective tube with a cable installed, characterized by fixing to the inner surface of the tube. A cable laying protection pipe repair method for repairing a protection pipe with a cable laid inside,
A lining sheet is formed by wrapping the cable while supplying the lining sheet from one opening side of the protective tube, and connecting the both ends in the width direction of the tubular lining sheet to each other. The lining sheet tube thus obtained is moved into the protective tube, the lining sheet tube is arranged from one opening of the protective tube to the other opening, and the other opening from the one opening of the protective tube A flexible tube made of an air-tight or liquid-tight material is drawn into the lining sheet tube disposed in the protective tube over the portion, and the tube is expanded to contact the lining sheet tube with the inner surface of the protective tube. In this state, the lining sheet tube is fixed to the inner surface of the protective tube, and then the tube is removed. Only the protective pipe repair method. A cable laying protection pipe repair method for repairing a protection pipe with a cable laid inside,
While supplying a lining sheet and a flexible tube formed of an airtight or liquid-tight material from one opening side of the protective tube, the lining sheet is formed into a tubular shape while wrapping the cable and the tube and is formed into a tubular shape The lining sheet tube obtained by connecting the both ends of the lining sheet in the width direction to each other to form a lining sheet tube and the tube wrapped in the lining sheet tube are moved into the protective tube as a unit. The lining sheet tube and the tube are arranged from one opening to the other opening of the protective tube, and the tube is inflated to bring the lining sheet tube into contact with the inner surface of the protective tube. The lining sheet tube is fixed to the inner surface of the protective tube, and then the tube is removed. Bull laying pre-protection tube repairing method.   4. The protective method for repairing a protective tube with a cable installed according to claim 1, wherein the lining sheet is formed of a flexible sheet impregnated or coated with an uncured curable resin.

Images