JP2000351156A - Short pipe body for slip lining and slip lining technique - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a short pipe body for slip lining which can be easily inserted into even a deformed or meandering pipeline. SOLUTION: A short pipe body 1 for slip lining is constituted by providing a connecting part wherein uneven fitting parts are provided on both end parts in the length direction of a cylindrical short pipe body with a smaller outer diameter than the inner diameter of a pipeline 5. As a plurality of the short pipe bodies 1 for slip lining are integrally connected with each other while they are connected on their connecting parts, these can be inserted into the pipeline 5 by drawing them in the pipeline 5 and a plurality of the short pipe bodies 1 for slip lining connected with each other are easily inserted by following deformation and meandering of the pipeline 5 by being drawn to be able to apply lining even to the deformed and meandering pipeline 5 by using the short pipe bodies for slip lining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short pipe for slip lining and a slip lining method using the same.

[0002]

2. Description of the Related Art A slip lining method is known as one of methods for repairing an old pipe such as a sewer pipe by lining.

In the slip lining method, as shown in the figure, a cylindrical short pipe having an outer diameter smaller than the inner diameter of a pipe is introduced from a manhole into an inlet of the pipe, and the short pipe is pressed by a hydraulic jack. When a plurality of short pipes are inserted into the pipe as shown in the drawing, the operation of inserting (pushing) the pipe into the pipe is repeated. This is a method in which a grouting agent is injected into a gap between the inner peripheral surface of the pipe and the hardening agent.

[0004]

However, in the above-mentioned conventional slip lining method, a method in which a plurality of short pipes are sequentially pushed into a pipe by a hydraulic jack is adopted, so that the pipe is deformed or meandering. In such a case, there is a problem that the short tube is caught in the middle of the pipe, and it is impossible to push the short tube further.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a short pipe for slip lining which can be easily inserted into a pipe which is deformed or meandering. An object of the present invention is to provide a slip lining method that can surely perform lining of a pipeline by using the method.

[0006]

In order to achieve the above object, the invention according to the first aspect of the present invention relates to a cylindrical short tube having an outer diameter smaller than the inner diameter of a pipe, and having concave and convex fittings at both longitudinal ends thereof. It is characterized in that a short pipe body for slip lining is formed by providing a joining section provided with a joining section.

According to a second aspect of the present invention, in the first aspect, a screw is formed at the joint.

A third aspect of the present invention is characterized in that, in the first aspect of the present invention, a semi-ring shaped receiving portion is formed in a lower half portion of one of the joining portions of the short tube for slip lining.

A fourth aspect of the present invention is characterized in that, in the first, second or third aspect of the present invention, a plurality of traction ends are provided at an intermediate portion in the length direction of the short tube for slip lining.

According to a fifth aspect of the present invention, there is provided a cylindrical short pipe having an outer diameter smaller than an inner diameter of a pipe, and a plurality of short pipes for slip lining having joints at both ends in a longitudinal direction thereof. While joining the plurality of short linings for slip lining by joining the joints of the bodies at the entrance of the pipeline, these are pulled from the exit side of the pipeline and sequentially inserted into the pipeline, The grouting agent is injected into the gap between the outer peripheral surface of the short pipe body for slip lining and the inner peripheral surface of the pipe line, and is cured.

The invention according to claim 6 is characterized in that, in the invention according to claim 5, the plurality of short pipes for slip lining connected to each other are pressed in the longitudinal direction of the pipe from the inlet side of the pipe. And

According to a seventh aspect of the present invention, in the fifth aspect of the present invention, the plurality of short pipes for slip lining are joined by joining joints of the plurality of short pipes for slip lining with screws. It is characterized by doing.

According to an eighth aspect of the present invention, in the fifth aspect of the present invention, the joints of the plurality of short pipes for slip lining are unevenly fitted to each other, and the fittings are fastened by fasteners. The plurality of short pipes for slip lining are connected to each other.

Therefore, according to the present invention, since the plurality of short pipes for slip lining are integrally joined while being joined at the joining portion, they are inserted into the duct while being pulled in the duct. The plurality of short pipes for slip lining connected to each other can be easily inserted by following the deformation or meandering of the pipe by being pulled, and can be inserted into the pipe that is deformed or meandering. Also, lining can be performed using a short pipe for slip lining.

[0015]

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

<Embodiment 1> FIG. 1 is a sectional view of a short tube 1 (hereinafter simply referred to as a short tube) 1 for slip lining according to Embodiment 1 of the present invention. Is fiber reinforced plastic (FRP), polyethylene (P
E), and is integrally formed in a cylindrical shape with a resin such as vinyl chloride (PVC). A male screw portion 1a is formed on the outer circumference of one end of the short tube body 1 in the longitudinal direction, and a female screw portion 1b is formed on the inner circumference of the large diameter portion at the other end. 1a and the female screw part 1b each constitute a joint part.

Sand 2 is adhered to a portion of the outer periphery of the short tube 1 except for the male screw portion 1a, and a plurality of screw holes 1c are formed in a middle portion of the short tube 1 in the longitudinal direction. Have been. A ring-shaped belt 3 constituting a traction end is passed through each screw hole 1c.
The stopper 4 is connected to a portion facing the outside of the device. still,
It is not necessary to form the screw holes 1c in all the short pipes 1, and it is sufficient to form the screw holes 1c only in the short pipe 1 to which the traction rope 8 (see FIG. 2) is connected in the slip lining method described later.

Next, a description will be given of a slip lining method according to the present invention, which is performed using the short pipe 1 having the above-described configuration, with reference to FIGS. 2 and 3 are sectional views showing the slip lining method according to the present invention in the order of steps.

In FIGS. 2 and 3, reference numeral 5 denotes a pipe such as a sewer pipe buried in the ground, and 6 denotes a manhole that opens to the ground. When lining the pipe 5, as shown in FIG. The pipe 1 (1-6) is connected to the manhole 6 on the inlet side of the pipe 5.
And the short pipes 1 (1-6) are connected to each other and are connected to the plurality of short pipes 1 (1-1-1) already introduced into the pipeline 5.
１−1-5) is joined to the last short tubular body 1 (1-5). That is, as shown in FIG.
The short tube 1 (1-6) introduced into the inside has a male screw portion 1 a formed on the outer periphery of one end (tip) of the last short tube 1 (already inserted into the pipe line 5). 1-5) is screwed into the female screw portion 1b formed on the inner periphery of the distal end portion, and is turned and screwed to the last short tube body 1 (1-5) by turning the whole.

The plurality of short pipes 1 (1-1 to 1-5) already inserted into the pipe 5 are connected to each other by a screw connection structure similar to that shown in FIG. The most advanced short tube 1 (1-
A guide cone 7 is attached to the front end of 1). A tow rope 8 is connected to each inner peripheral portion of the guide cone 7 and the intermediate short tube 1 (1-3). The connection of the pulling rope 8 to the short tube 1 (1-3) is made by connecting one end of the pulling rope 8 to the belt 3 shown in FIG.

Here, the other end of the tow rope 8 is guided by guide rollers 9 and 10, extends from the outlet of the conduit 5 to the ground through the manhole 6, and is wound around a winch 11 installed on the ground. I have.

As described above, the short tube 1 (1-6) introduced from the manhole 6 is replaced by the plurality of short tubes 1 (1-1 to 1-5) already introduced into the pipe 5. The last short tube 1
When both are joined by joining to (1-5), the winch 11
And pulling the tow rope 8 to operate the pipeline 5
A plurality of short pipes 1 (1
−1 to 1-6) toward the outlet side of the pipeline, and the hydraulic jack 12 installed at the bottom of the manhole 6.
A plurality of short pipes 1 (1-1 to 1-6) in the pipe 5
Is pushed toward the outlet side of the pipeline 5.

In the slip lining method according to the present invention, since the plurality of short pipes 1 are integrally joined while being joined at their joints, these are joined in the pipe 5 as described above. The plurality of short pipes 1 connected to each other can be easily inserted while following the deformation or meandering of the pipe line 5 by being pulled. Even in the case of deformation or meandering, a plurality of short tubes 1 can be inserted into the pipe 5 and used for lining the pipe 5.

When a plurality of short pipes 1 are inserted into the pipe 5 as shown in FIG. 3 by repeating the above operation, the outer peripheral surfaces of the plurality of continuous short pipes 1 and the A grouting agent 13 such as cement milk or resin mortar is injected into a gap between the inner peripheral surface and the grouting agent 13 and hardened. In addition, grout agent 1
3 is injected from a hose 14 screwed into a screw hole 1c formed in the short tube 1 and a hose 15 inserted into the gap between the short tube 1 and the conduit 5 from the manhole 6 side, and a grout agent After the hardening 13 is removed and the hoses 14 and 15 are removed, the screw hole 1c opened on the inner peripheral surface of the short tube body 1 is closed by a blind screw 16 as shown in FIG.

When the grouting agent 13 hardens as described above, the plurality of short tubes 1 inserted into the pipe 5 are integrally fixed to the inner peripheral wall of the pipe 5 by the grouting agent 13, The inner peripheral wall of the conduit 5 is lined and repaired by the plurality of short pipes 1. As shown in FIG. 1, since the sand 2 is bonded to the outer peripheral surface of each short tube 1, the adhesive strength of the grout agent 13 to the outer peripheral surface of the short tube 1 is increased.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 6 is a cross-sectional view of the short tube according to the present embodiment, FIG. 7 is a partial cross-sectional view showing a joint structure between the short tubes, and FIG. 8 is an exploded perspective view showing a joint structure between the short tubes. FIG.

The short tube 21 according to the second embodiment is also integrally formed into a cylindrical shape with a resin such as fiber reinforced plastic (FRP), polyethylene (PE), or vinyl chloride (PVC). The configuration of the joining portion formed in the portion and the joining method are different from those of the short tube body 1 according to the first embodiment.

That is, in the short tube body 21 according to the present embodiment, a semi-ring shaped receiving portion 21b is integrally formed with a lower half portion of a flange-shaped large diameter portion 21a formed at one end in the length direction. And a groove 2 on the inner periphery of the receiving portion 21b.
1c is formed. As shown in FIG. 8, two positioning holes 21d are formed in the left and right upper end surfaces of the receiving portion 21b, and two bolt holes 21e are formed in the left and right side walls of the receiving portion 21b. . A plurality of bolt holes 21f are formed in the upper half of the large diameter portion 21a in the longitudinal direction.

On the other hand, a small-diameter portion 21g is formed at the other end in the length direction of the short tube 21, and a convex portion 21h is integrally formed on the outer periphery of the small-diameter portion 21g to protrude over the entire circumference. I have.
Also, four bolt holes (not shown) are formed on the left and right sides of the small diameter portion 21g, respectively.

In order to join the short tubes 21 having the above-described configuration, as shown in FIG.
The first small-diameter portion 21g is placed on the receiving portion 21b of the other short tube body 21, and the convex portion 21h protruding from the outer periphery of the small-diameter portion 21g.
Into the concave groove 21c formed in the receiving portion 21b, and the bolt hole 2 formed in the large diameter portion 21a of the one short tube body 21 is formed.
1e (see FIG. 8) and a small-diameter portion 21g of one short tube 21 by a bolt (not shown) inserted into a bolt hole (not shown) formed in a small-diameter portion 21g of the other short tube 21 and a nut screwed thereto. To the receiving portion 21b of the other short tube body 21.

Then, as shown in FIGS. 7 and 8, the semi-ring-shaped pressing member 22 is connected to the small-diameter portion 21 of one of the short tubes 21.
g from above. At this time, the holding member 22
Two positioning projections 22 projecting from the left and right lower end surfaces
a is fitted into the positioning hole 21d formed in the upper end surface of the receiving portion 21b of the short tube body 21, the positioning of the pressing member 22 is performed, and the concave groove 22b formed in the inner periphery of the pressing member 22. The convex portion 21h protruding from the short pipe 21 is fitted into the short pipe 21.

As described above, when the pressing member 22 is put on the upper half of the small diameter portion 21g of one of the short tubes 21, the short tube 2
A bolt 23 inserted through a bolt hole 21f penetrating through one side and a bolt hole 22c penetrating the holding member 22 in the length direction, a nut 24 screwed to both ends of the bolt 23, and the holding member 2
The holding member 22 is connected to the two short pipes 21 by a bolt 25 inserted into the bolt hole 22d formed in the second pipe 2 and the bolt hole (not shown) formed in the short pipe 21 and nuts 26 screwed to both ends thereof. The two short pipes 21 are connected to each other by a pressing member 22.

Thus, the short pipes 21 are connected to each other by the joint structure described above, and are pulled into the pipe 5 and inserted into the pipe 5, thereby obtaining the same as shown in FIGS. The pipe 5 can be lined and repaired, and the same effect as in the first embodiment can be obtained.

[0034]

As is apparent from the above description, according to the present invention, a plurality of short pipes for slip lining are integrally joined while being joined at their joints. It can be inserted into the pipeline while towing, and the plurality of short linings for slip lining connected to each other can be easily inserted following the deformation or meandering of the pipeline by being pulled, and can be deformed or meandering. An effect is obtained in which the lining can be performed using the short pipe for slip lining even on such a pipeline.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a short tube for slip lining according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view showing a slip lining method (insertion work) according to the present invention.

FIG. 3 is a sectional view showing a slip lining method (hardening operation) according to the present invention.

FIG. 4 is a partial cross-sectional view showing a joint structure between short pipes for slip lining according to Embodiment 1 of the present invention.

FIG. 5 is a partial cross-sectional view showing a state after lining of a screw hole portion formed in the short tube body.

FIG. 6 is a cross-sectional view of a short tube according to Embodiment 2 of the present invention.

FIG. 7 is a partial cross-sectional view showing a joint structure between short pipes for slip lining according to Embodiment 2 of the present invention.

FIG. 8 is an exploded perspective view showing a joint structure between short pipes for slip lining according to Embodiment 2 of the present invention.

[Explanation of symbols]

 1, 21 Short pipe body for slip lining 1a Male thread part 1b Female thread part 3 Belt (traction end) 5 Pipe line 8 Traction rope 11 Winch 12 Hydraulic jack 13 Grout agent 21b Receiving part 23, 25 Bolt (fastener) 24, 26 Nuts (fasteners)

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 592004301 All Co., Ltd. 1-194, Hayashi, Tokorozawa-shi, Saitama 4 (72) Inventor Takao Kamiyama 31-27 Daikancho, Hiratsuka-shi, Kanagawa Shonan Synthetic Resin Co., Ltd. Inside the factory (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Pref.Yokoshimanai Co., Ltd. (72) Inventor Shigeru Endo 2-12-4 Hanahata, Tsukuba, Ibaraki Pref. Inventor Hiroyuki Aoki 1-194 Hayashi, Tokorozawa-shi, Saitama F-term in all four companies (reference) 3H025 EA01 EB21 4F211 AA04 AA15 AD12 AD19 AD25 AG03 AG08 AH43 SA17 SC03 SD04 SD19 SD23 SJ01 SJ13 SJ15 SJ29

Claims (8)

[Claims] 1. A slip which is a cylindrical short tube having an outer diameter smaller than an inner diameter of a pipe, and having a joint portion provided with concave and convex fitting portions at both ends in a longitudinal direction thereof. Short pipe for lining. 2. The short pipe body for a slip lining according to claim 1, wherein a screw is formed at the joint. 3. The short tube for a slip lining according to claim 1, wherein a semi-ring shaped receiving portion is formed in a lower half portion of one of the joining portions. 4. The short tube for a slip lining according to claim 1, wherein a plurality of traction ends are provided at a middle portion in a length direction. 5. A cylindrical short pipe body having an outer diameter smaller than the inner diameter of a pipe, wherein a plurality of slip lining short pipe bodies having a joint portion at both ends in a longitudinal direction thereof are joined to each other. While joining the plurality of short pipes for slip lining by joining at the inlet of the pipe, they are pulled from the outlet side of the pipe and inserted sequentially into the pipe, and then these short pipes for slip lining are connected. A slip lining method characterized in that a grouting agent is injected into a gap between an outer peripheral surface of a body and an inner peripheral surface of a pipeline and is cured. 6. The slip lining method according to claim 5, wherein the plurality of short pipes for slip lining connected to each other are pressed in a longitudinal direction of the pipe from an inlet side of the pipe. 7. The slip lining method according to claim 5, wherein the plurality of short pipes for slip lining are joined by joining joints of the plurality of short pipes for slip lining with screws. . 8. The plurality of short pipes for slip lining are joined by fitting the joints of the plurality of short pipes for slip lining unevenly, and fastening the fitting portion with a fastener. The method according to claim 5, characterized in that: