JP2006077465A - Regeneration method of mounting pipe opening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a regeneration method capable of surely fixing a pipe opening saddle to a mounting pipe opening even if the inside of a main pipe or the circumference of the mounting pipe opening is in a very bad deterioration state in regeneration work fixing the pipe opening saddle to the mounting pipe opening. <P>SOLUTION: The regeneration method of the mounting pipe opening 5 is so constituted that the pipe opening saddle 1 equipped with a cylindrical sleeve 11 and a collar-shaped flange 12 projected from one end edge of the sleeve 11 is conveyed inside of the main pipe 4 in a state to mount it on the surface of a regeneration sheet 2 formed by infiltrating an ultraviolet radiation curing resin into a glass fibrous-made basic material, and after the flange 12 of the pipe opening saddle 1 and the regeneration sheet 2 have been pressed to the inside of the main pipe 4 around the mounting pipe opening 5 while inserting the sleeve 11 of the pipe opening saddle 1 in the mounting pipe opening 5, the ultraviolet radiation is irradiated to the regeneration sheet 2 to make it cure and that the pipe opening saddle 1 is fixed to the mounting pipe opening 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for rehabilitating a mounting pipe port for watertight repair of a connecting portion (mounting pipe port) between a main pipe in an underground pipe such as a sewer and a mounting pipe that joins the main pipe.

  Pipes such as sewers buried in the ground are eroded on the inner surface by long-term use, and cracks and seams shift due to ground pressure and ground subsidence, and the strength also decreases. In particular, in the vicinity of the attachment pipe port where the attachment pipe merges with the main pipe, the above-mentioned deterioration is often advanced, and the rehabilitation thereof is necessary.

  As a method of rehabilitating underground pipes, a method of watertightly lining the inner surface of a pipe with a rehabilitation pipe made of a thermoplastic resin is generally used. As a rehabilitation method, a method described in Patent Document 1 has been proposed and put into practical use.

In this construction method, before lining the entire inner surface of the main pipe or the mounting pipe with the rehabilitation pipe, a pipe opening saddle (water stop pad) 9 as shown in FIG. While repairing the circumference | surroundings, it is going to improve the water-tightness in the pipe end part of the renovated pipe inserted in an attachment pipe. The tube opening saddle 9 includes a cylindrical sleeve 91 and a flange-like flange 92 projecting from one end edge of the sleeve 91, and the inner peripheral surface of the sleeve 91 is made of water-expandable rubber. The water stop member 93 is bonded in advance, and a synthetic rubber adhesive 94 such as butyl rubber is applied to the upper surface of the flange 92. This pipe opening saddle 9 is carried into the main pipe using an appropriate sticking device, the sleeve 91 is inserted into the attachment pipe opening from the main pipe side, and the flange 92 is pressed against the inner surface of the main pipe. , Fixed to the mounting tube port. Thereafter, the diameter of the rehabilitation pipe inserted into the attachment pipe is increased by heating, and the end of the pipe is brought into close contact with the sleeve 91 of the pipe opening saddle 9, thereby forming an integral water stop surface extending from the attachment pipe to the inner surface of the main pipe.
JP 2003-336786 A

  In the above conventional method, the flange is bonded to the inner surface of the main pipe through a synthetic rubber adhesive applied to the flange of the pipe opening saddle. The surroundings of the mouth were aged more than expected, and there were cases where there was a large gap between the main pipe and the mounting pipe, or the inner surface of the main pipe collapsed over a wide area. In this way, when the adhesive surface of the flange is extremely rough, it is difficult to fix the flange to the main pipe only with the adhesive strength of the synthetic rubber adhesive, and synthetic rubber adhesive and modified silicone adhesive or hot Even when a melt adhesive was used in combination, it was confirmed that a very effective sticking force could not be expected.

  In view of this, the present invention ensures that the pipe saddle is securely attached to the mounting pipe in the rehabilitation work for fixing the pipe saddle to the mounting pipe as described above, even when the inner surface of the main pipe and the surroundings of the mounting pipe are severely deteriorated. It is an object of the present invention to provide a rehabilitation method that can be fixed to the water.

In order to solve the above-mentioned problems, the water stopping method for the mounting pipe port according to the present invention includes a cylindrical sleeve having an outer diameter substantially the same as or slightly smaller than the inner diameter of the mounting pipe port, and one end edge of the sleeve. In a state where a tube-end saddle comprising a flange-like flange that protrudes is placed on the surface of a rehabilitated sheet obtained by impregnating an ultraviolet curable resin into a glass fiber base material having a larger area than the flange, The step of carrying the rehabilitation sheet and the tube-end saddle into the main tube, and pressing the flange of the tube-port saddle and the rehabilitation sheet against the inner surface of the main tube around the mount tube port while inserting the sleeve of the tube-port saddle into the mount tube port. And a step of fixing the tube-end saddle to the attachment tube port by irradiating and curing the rehabilitation sheet with ultraviolet rays.

  In this rehabilitation method, an ultraviolet curable rehabilitation sheet is used to press and fix the pipe opening saddle to the attachment pipe opening, and therefore, a rehabilitation sheet having a sufficiently larger area than the flange of the pipe opening saddle can be used. . The rehabilitation sheet obtained by impregnating a glass fiber base material with an ultraviolet curable resin is flexible before curing and easily secures an appropriate thickness, so that it adheres well to irregularities on the inner surface of the main pipe. Therefore, even if the deterioration of the inner surface of the main pipe is severe, if the size of the rehabilitation sheet is adequately secured, compared with the conventional technique in which the pipe-end saddle is attached to the main pipe with a synthetic rubber adhesive. And a much more stable sticking force can be obtained.

Further, according to this rehabilitation method, the tube opening saddle and the rehabilitation sheet can be formed of different materials. Since the pipe saddle is a member for stopping the pipe end part of the rehabilitation pipe inserted into the attachment pipe mouth, the material and shape of the rehabilitation pipe should be appropriate depending on the material of the rehabilitation pipe and the processing method of the pipe end part. You can choose
In the present invention, an opening having a diameter substantially the same as or slightly smaller than the inner diameter of the sleeve may be formed in advance in the approximate center of the rehabilitation sheet. According to this, after fixing the pipe opening saddle to the attachment pipe opening, it becomes easy to insert the rehabilitation pipe inserted into the attachment pipe into the sleeve, and the workability is improved.

  Moreover, in this invention, it is preferable that the water stop member which consists of water expansible rubber is affixed beforehand to the inner periphery of the sleeve of a pipe opening saddle. This water stop member seals between the pipe end portion of the rehabilitated pipe inserted into the attachment pipe and the pipe mouth saddle, and is attached to the pipe mouth saddle in advance. Also improves.

  According to the rehabilitation method of the mounting pipe opening of the present invention configured as described above, the adhesion force of the rehabilitation sheet impregnated with the ultraviolet curable resin even when the inner surface of the main pipe or the surroundings of the mounting pipe opening is severe. Thus, the pipe port saddle can be securely fixed to the mounting pipe port.

  In addition, according to this rehabilitation method, it is possible to simultaneously fix the pipe saddle to the mounting pipe port and repair the inner surface of the main pipe around the mounting pipe port, so that the inner surface of the mounting pipe and the main pipe is subsequently lined. Work efficiency when rehabilitating is improved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a tube port saddle 1 and a rehabilitation sheet 2 used in the attachment tube port rehabilitation method of the present invention.

  The tube opening saddle 1 includes a cylindrical sleeve 11 and a flange 12 projecting in a hook shape from one end edge of the sleeve 11. The outer diameter of the sleeve 11 is formed to be substantially the same as or slightly smaller than the inner diameter of the mounting pipe, and the flange 12 is formed in a curved shape forming a part of a cylindrical surface along the inner surface of the main pipe. An annular rib that is continuous in the circumferential direction is provided on the inner circumferential surface of the sleeve 11 at an appropriate interval, and a water stop member 13 made of water-expandable rubber is bonded along the inner circumferential direction between the annular ribs. Has been.

The pipe opening saddle 1 may be formed of a thermoplastic resin having the same composition as that of the rehabilitation pipe to be inserted into the attachment pipe later, or a synthetic resin or a synthetic rubber material different from that of the rehabilitation pipe, or thin. It may be formed of a metal material such as a stainless steel plate. When the attachment pipe is obliquely connected to the main pipe, the sleeve 11 may be formed in an oblique cylinder shape according to the angle.

  The rehabilitation sheet 2 is formed by impregnating a glass fiber base material with an ultraviolet curable resin. The base material is a laminate of a plain woven glass cloth 21 and a non-directional glass chopped strand mat 22. In order to prevent fraying of the end of the glass cloth 21, the glass chopped strand mat 22 is formed to be slightly larger. Yes. The ultraviolet curable resin is a known resin mainly composed of an ortho-type unsaturated polyester resin, and is impregnated with an appropriate thickness over the entire surface of the substrate. A circular opening 23 that is slightly smaller than the inner diameter of the sleeve 11 is formed at the center of the rehabilitation sheet 2.

  FIG. 2 is a diagram showing a schematic process of a rehabilitation method using the above-described tube opening saddle 1 and rehabilitation sheet 2. The pipe opening saddle 1 and the rehabilitation sheet 2 are carried into the main pipe 4 by the sticking device 3 as shown in FIG. The sticking device 3 is provided with a packer part 32 that can be expanded and contracted by air pressure on a carriage part 31 that can move in the main pipe 4 by induction. The packer portion 32 is obtained by attaching a translucent packer 34 made of translucent silicon rubber to the surface of a substantially semi-cylindrical packer frame 33, and the inside of the packer frame 33 is hermetically sealed. When air is injected from the side 33 and pressurized, the packer 34 expands like a balloon. An ultraviolet lamp 35 is incorporated inside the packer frame 33.

  When the attachment pipe port 5 is rehabilitated, the rehabilitation sheet 2 and the pipe port saddle 1 are placed on the packer 34 before the sticking device 3 is carried into the main pipe 4. The rehabilitation sheet 2 is brought into a bag made of a shielding film in advance, opened at the work site, and placed on the packer 34 in an uncured state. The surface of the packer 34 and the rehabilitation sheet 2 are in close contact with each other due to the viscosity of the ultraviolet curable resin itself, particularly without using an adhesive or the like. To be held. Next, the tube opening saddle 1 is placed on the rehabilitation sheet 2. At this time, the opening 23 formed in the rehabilitation sheet 2 and the sleeve 11 of the tube opening saddle 1 are matched.

  Then, as shown in FIG. 2 (b), the sticking device 3 is carried into the main pipe 4, the guide cable 36 is pulled to position the pipe mouth saddle 1 immediately below the attachment pipe mouth 5, and then the sticking is performed. The device 3 is fixed in the main pipe 4.

  Subsequently, as shown in FIG. 2C, air is injected into the packer portion 32 through the air injection tube 37 connected to the packer portion 32, and the packer 34 is expanded by the air pressure. Then, the packer 34 lifts the rehabilitation sheet 2 and the pipe opening saddle 1 and pushes the sleeve 11 of the pipe opening saddle 1 into the attachment pipe opening 5 and presses the rehabilitation sheet 2 against the inner surface of the main pipe 4 around the attachment pipe opening 5. To do.

  While maintaining the pressurized state in this state, as shown in FIG. 2 (d), the ultraviolet lamp 35 is turned on to irradiate ultraviolet rays from the lower side of the rehabilitation sheet 2 for a predetermined time. As a result, the rehabilitated sheet 2 is cured and firmly fixed to the inner surface of the main pipe 4.

  When the rehabilitation sheet 2 is cured, the inside of the packer portion 32 is deaerated as shown in FIG. Then, the packer 34 peels from the rehabilitation sheet 2 stuck on the main pipe 4 and contracts. If the sticking apparatus 3 is carried out, the sticking work of the rehabilitation sheet 2 is completed.

Thereafter, as shown in FIG. 2 (e), a thermoplastic resin rehabilitating tube 7 having a sealed end is inserted into the mounting tube 6, and the rehabilitating tube 7 is pressurized and heated to attach the mounting tube 6 thereto. If the tip of the rehabilitation pipe 7 is cut in accordance with the position of the mounting pipe port 5 after the diameter is expanded so as to be in close contact with the inner surface, the range from the mounting pipe port 5 to the mounting pipe 6 is integrated with the lining rehabilitation. Is done. The water stop member 13 adhered to the inner peripheral surface of the sleeve 11 of the tube opening saddle 1 contributes to improving the adhesion between the sleeve 11 and the rehabilitated pipe 7.

  By such rehabilitation work, even when the deterioration state of the inner surface of the main pipe 4 and the surroundings of the mounting pipe port 5 is severe, the pipe port saddle 1 is securely fixed to the mounting pipe port 5, and the main pipe 4 is connected to the main pipe 4. An integral water stop surface can be formed over the inner surface.

  In addition, the structure of the sticking apparatus 3 shown to the said embodiment is an example, and in this invention, it does not specifically limit about the detailed structure of the sticking apparatus 3 itself.

It is a perspective view of a tube opening saddle and a renovation sheet used in the method for rehabilitation of the mounting tube opening of the present invention. It is a figure which shows the schematic process of the rehabilitation method using the said pipe opening saddle and the rehabilitation sheet. It is a perspective view of a pipe opening saddle used in the conventional rehabilitation method described in Patent Document 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe port saddle 11 Sleeve 12 Flange 13 Water stop member 2 Rehabilitation sheet 23 Opening 3 Sticking device 4 Main pipe 5 Installation pipe port 6 Installation pipe 7 Rehabilitation pipe

Claims (3)

A pipe port saddle comprising a cylindrical sleeve having an outer diameter substantially the same as or slightly smaller than the inner diameter of the mounting pipe port, and a flange-like flange projecting from one end edge of the sleeve, In the state where the glass fiber base material having a larger area is impregnated with the UV curable resin and placed on the surface of the rehabilitation sheet, the rehabilitation sheet and the pipe opening saddle are carried into the main pipe, and the sleeve of the pipe opening saddle is loaded. Pressing the flange of the pipe mouth saddle and the rehabilitation sheet against the inner surface of the main pipe around the mounting pipe mouth,
Fixing the tube opening saddle to the mounting tube port by irradiating the rehabilitating sheet with ultraviolet rays and curing it.   2. A method for rehabilitating a mounting pipe opening according to claim 1, wherein an opening having a diameter substantially the same as or slightly smaller than the inner diameter of the sleeve is formed in advance in the approximate center of the rehabilitation sheet. Mouth rehabilitation method. 2. A method for rehabilitating a mounting pipe opening according to claim 1, wherein a water stop member made of a water-expandable rubber is attached in advance to the inner periphery of the sleeve of the pipe opening saddle. .

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