JPH0818366B2 - Inner surface lining method of pipe - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner lining method, and more particularly to a pipe inner lining method useful for repairing and protecting sewer pipes.

[0002]

2. Description of the Related Art Conventionally, for the purpose of repairing and protecting the inner surface of a sewer pipe, as shown in FIGS. 6 to 8, a vertically elongated strip-shaped pipe having outwardly protruding joining rib pieces 2 and 2 on both sides. Using the constituent member 1, the pipe constituent member 1 is spirally wound in the sewer pipe a to assemble the tubular body 1A, and the grout c is provided in the gap b formed between the tubular body 1A and the sewer pipe a. A method of injecting and filling has been proposed (for example, JP-A-3-2820).
95).

The pipe constituent member 1 used in the above-mentioned conventional method is molded from an elastic plastic such as polyvinyl chloride, and a pair of left and right joints protruding outwardly on both sides thereof as shown in FIGS. Rib pieces 2 and 2 are formed in parallel with each other in the longitudinal direction, and the rib pieces 2 and 2 are paired left and right together to form two rib pieces along the spiral joint end 1a (see FIG. 7) of the tubular body 1A. The parallel engaging grooves 3 and 3 (see FIG. 8) are formed.

To join and integrate the spiral joint 1a of the tubular body 1A, a vertically elongated strip-shaped joining member 4 is applied, and the joining member 4 is elastically fitted on one side of the engaging recessed ridges 3 and 3. It has two parallel engaging ridges 5, 5 for engagement, and the spiral joint 1a is formed by elastic engagement of the engaging ridges 3, 3, 5, 5.
It has a structure that can be joined and integrated.

The pipe constituent member 1 has a joining rib piece 2 on the outer surface side.
2 has a suitable number of T-shaped, Y-shaped, etc. reinforcing rib pieces 6, ... In parallel with the tip ends of the rib pieces 6 ,.
Abut against the inner surface of the sewer pipe a during formation of the ribs 2, 2
In cooperation with the inner wall of the sewer pipe a, a gap b necessary for filling the grout c is formed.

The injection filling of the grout c into the gap b is extremely important for the final strength of the inner surface lining of the sewer pipe a. The inner lining is composed of a tubular body 1A and a grout c backfilled around the tubular body 1A.

The pipe constituent member 1 must be able to be wound into a roll in consideration of securing a storage space and convenience of carrying it into a construction site. The height is limited to the range of 5 to 30 mm at most,
Therefore, the gap b formed between the tubular body 1A and the sewer pipe a
Also has a width of about 5 to 30 mm. Moreover, since the tips of the rib pieces 2, 2, 6, ... Abut on the inner surface of the sewer pipe a, the gap b merely connects spirally between the rib pieces 2, 2, 6 ,. The injection filling resistance of the grout c into the gap b becomes considerably large.

Therefore, in the conventional method, after the tubular body 1A is assembled, the grout injection / filling port is punched in the tubular body 1A at an appropriate interval in the pipe length direction, and the space between adjacent injection / filling ports is set as one block. Although grout is injected and filled in each block, this is an inefficient work, requires a lot of manpower and time, and causes a rise in construction costs.

In addition, in the sewer pipe a buried in a heavy traffic area such as a truck, the load resistance,
Considering impact resistance and the like, it is desirable to increase the vertical width of the filling gap b of the grout to increase the strength of the inner surface lining, but in the conventional method, the rib pieces 2, 2, 6, ... There is a problem that such a request cannot be dealt with because the roll-shaped winding is limited to a possible range.

The present invention has been made for the purpose of eliminating such conventional problems.

[0011]

SUMMARY OF THE INVENTION The present invention is to assemble a tubular body by spirally winding a pipe constituent member having a vertically long strip shape and having outwardly protruding joining rib pieces on at least both sides thereof. In the inner surface lining method of the pipe that forms a gap required for injecting and filling grout between the tubular body and the pipe, a slide ring is installed in the pipe substantially concentrically and movably in the pipe length direction. The inner surface lining method for a pipe is characterized in that the slide ring is moved in the length direction of the pipe while the tubular body is assembled from the pipe constituting members inside the slide ring.

[0012]

An embodiment of the method of the present invention will be described below with reference to the accompanying drawings. In addition,
Substantially the same parts are designated by the same reference numerals.

In the method of the present invention, as shown in FIGS. 1 and 2, a slide ring 7 which can move in the direction of the length of a pipe such as a sewer pipe a is used.

The slide ring 7 has a tubular body 1A inside thereof.
The ring main body 8 and the roller device 9 that holds the ring main body 8 concentrically in the sewer pipe a and movably in the direction of the pipe length are used for assembling.

The roller device 9 is provided on the front and rear portions of the outer peripheral surface of the ring body 8 at appropriate intervals in the circumferential direction of the pipe, for example, 120.
It is mounted and fixed at three locations at a main body 9a with an interval of °. The ring body 8 may be installed in the sewer pipe a in a slightly more eccentric state than the concentric state.

The ring body 8 is formed of, for example, a reinforced plastic having good slipperiness or other suitable metal material, and has a length of 1.5 to 3.0 times, preferably about 2.0 times the width of the tube constituent member 1. have. Before assembling the tubular body 1A, the ring body 8 has a guide groove 11 extending from the front to the rear end in order to attach and fix the spacing member 10 described in detail below at an appropriate position on the inner surface of the sewer pipe a. And the guide groove 1 is formed.
1 is located in the middle of the roller devices 9, 9 which are adjacent to each other in the pipe circumferential direction.

In carrying out the method of the present invention, a slide ring 7 is installed concentrically and movably in the pipe length direction on the starting end side in the sewer pipe a as shown by the phantom line in FIG. The space holding member 10 is attached and fixed to the predetermined position of the inner surface of the sewer pipe a by using the guide groove 11 of the sewer pipe 11 by applying an adhesive (not shown).

The space holding member 10 is for holding the tubular body 1A assembled from the pipe constituting member 1 concentrically in the sewer pipe a, and the substantial thickness of the slide ring 7,
That is, it has a thickness corresponding to the difference between the outer diameter (radius) D ₁ including the roller device 9 and the inner diameter (radius) D ₂ (see FIG. 2). The material is not particularly limited as long as it has good dimensional stability, and for example, the same material as the tube constituent member 1 is used.

The mounting position of the spacing member 10 is such that the spacing member 10 is arranged in the middle in the width direction with reference to one coil 1A ₁ (see FIG. 3) constituting the tubular body 1A. Is suitable, but is not necessarily limited to this. Although a block-shaped member is shown as the spacing member 10 in the drawing, it may be a rod-shaped member. In the case of the rod shape, it is preliminarily adhered and fixed to the inner surface of the pipe a in the longitudinal direction so as to be positioned between the inner surface of the pipe a and the slide ring 7, and in this case, the guide groove 11 need not be provided.

FIG. 3 schematically shows the situation of the assembling process of the tubular body 1A in the method of the present invention. The tubular body 1A has the joining rib pieces 2 and 2 and the reinforcing rib pieces as in the conventional method. 6,
, And the spiral joint portion 1a is joined and integrated by applying the joint member 4 while being spirally wound.

The method of the present invention is characterized in that the tubular body 1A is assembled in the slide ring 7 installed in the sewer pipe a.

This will be described in detail below with reference to one specific example. The slide ring 7 has a tubular body 1A inside thereof.
When one coil part 1A _{1 of} is assembled, the coil 1A 1
_The distance corresponding to the width of 1 is moved forward by 1 pitch.
This movement and advance is performed by using manpower and / or mechanical force. The guide groove 1 of the slide ring 7 at the advanced position
1 is used to attach and fix the spacing member 10 to a predetermined portion of the inner surface of the sewer pipe a by applying an adhesive. The spacing member 10 may be attached and fixed during the assembly of the coil 1A ₁ . When the attachment of the spacing member 10 is completed, the assembly of the next coil 1A ₁ is restarted in the slide ring 7, and when this is completed, the slide ring 7 is moved forward 1
The pitch is advanced. When the slide ring 7 is advanced by one pitch, the previous spacing member 10 is left behind by one pitch.
Hereinafter, the space holding member 10 is fixedly attached, and the subsequent coil 1A
_By assembling 1 and advancing the slide ring 7 by 1 pitch as 1 cycle, by repeating this, the tubular body 1A can be formed over the entire length of the sewer pipe a. Further, the tubular body 1A is held at the concentric position in the sewer pipe a by the spacing member 10 arranged on the outer peripheral portion thereof. The forward movement of the slide ring 7 may be performed simultaneously with the assembly of the tubular body 1A.

As shown in the enlarged view of FIG.
When the tubular body 1A is assembled while abutting the rib pieces 2, 2, 6, ... Of the outer surface with the inner surface of the slide ring 7, the outer diameter of the tubular body 1A is reduced to a dimension corresponding to the inner diameter of the ring 7,
As a result, the size of the vertical width of the gap b between the sewer pipe a and the vertical width is increased by the outer diameter reduction of the tubular body 1A, that is, the thickness of the slide ring 7.

Also, of the gap b, the expanded gap b increased
₁ is communicated linearly in the pipe length direction, and the grout injected into the gap b can flow linearly in the enlarged gap b ₁ in the pipe length direction, so that the flow resistance at the time of pouring and filling the grout is reduced. It can be reduced. Also depending on the size of the expansion gap b _1, in enlarged gap b _1, grouting filling hose (not shown) after the mono-insertion, as referred to pulling back while ejecting grout from the tip of the hose Injecting and filling means can be adopted.

Further, the enlargement ratio of the gap b can be changed by preparing several kinds of slide rings 7 having different inner diameters and selectively using one of them, so that the enlargement ratio can be easily and easily changed. it can.

[0026]

According to the method of the present invention, since the gap between the tubular body and the sewer pipe can be enlarged by applying the slide ring, the filling work of the grout into the gap can be facilitated, and the labor and labor can be reduced. In addition to contributing to the reduction of construction time and the cost of construction, it is possible to meet the demand for increased strength of the inner lining.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an example of a slide ring applied to a method of the present invention.

FIG. 2 is a sectional view taken along the line 2-2 of FIG.

FIG. 3 is an explanatory view schematically showing a situation of an assembling process of the tubular body in the method of the present invention.

FIG. 4 is a longitudinal sectional view showing the same part in an enlarged manner.

5 is a cross-sectional view taken along line 5-5 of FIG.

FIG. 6 is an explanatory view schematically showing a state of a tubular body assembling step in the conventional method.

FIG. 7 is an enlarged cross-sectional view showing the formation state of the inner surface lining.

FIG. 8 is an explanatory view showing a joint integration state of spiral joints in the tubular body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe constituent member 2 Rib piece for joining 3 Recessed ridge for engagement 4 Joining member 5 Convex ridge for joining 7 Slide ring 8 Ring body 9 Roller device

Front Page Continuation (72) Inventor Katsuro Abe 1-2-8 Hatchobori, Chuo-ku, Tokyo Inside Kubota Construction Co., Ltd. (72) Inventor Yuji Sakuma 1-47 Shikitsu Higashi, Naniwa-ku, Osaka, Osaka Kubota Co., Ltd. (72) Inventor Kazuhiro Hirao 1-247 Shikitsu Higashi, Naniwa-ku, Osaka City, Osaka Prefecture Kubota Co., Ltd. (56) Reference JP-A-4-103337 (JP, A)

Claims (1)

[Claims] 1. A tube-constituting member having a vertically long strip shape and having outwardly protruding joining rib pieces on at least both sides is spirally wound in the tube to assemble a tubular body, and at the same time, a grout is formed between the tubular body and the pipe. In the inner surface lining method of the pipe that forms the gap required for injection and filling, the slide ring is installed in the pipe substantially concentrically and movably in the pipe length direction, and the slide ring is moved in the pipe length direction. At the same time, an inner surface lining method for a pipe is characterized in that the tubular body is assembled from the pipe constituting members within the slide ring.