JPH08277992A - Pipe inside face lining method - Google Patents

Abstract

PURPOSE: To easily form a lining with high strength by spirally arranging reinforcement having spring elasticity along an inside face of a pipe, forming a liner on the reinforcement, and filling back-filling material on the back face of the liner in formation of the liner formed by spirally winding a liner strip inside the pipe. CONSTITUTION: Using a piano wire with a circular cross section as reinforcement 7, the reinforcement 7 is spirally arranged along an inside face of a pipe (a). Then, spacers 8, each of which possesses a circular cross section and is provided with two lines of vertical ribs 9 protruding outward so as to extend in the pipe axis direction and horizontal rib 10 extending from the vertical ribs 9 toward the side edges on the outside face side, are sequently joined one after another in the pipe axis direction so as to be arranged over the overall length of the pipe (a) in an upper area inside the pipe (a). After the spacers 8 are fixed in the inside of the pipe (a) by means of an anchor bolt or the like, a liner strip 1 is arranged so as to be fixed by means of a joiner and the like, and between the vertical ribs 9, a back-filling material (c) is spread over the whole of the back face of a liner 1A while using a passage 12, and consequently, a lining is formed.

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, a liner strip 1 provided with outwardly protruding joining rib pieces 2, 2 as shown in FIGS. The liner 1A is assembled by spirally winding the strip 1 in the sewer pipe a using
A construction method has been proposed in which a grout c is injected and filled into a gap b between A and the sewer pipe a (for example, JP-A-3-2820).
95).

The strip 1 used in the above-mentioned conventional method is made of, for example, rigid or semi-rigid polyvinyl chloride, and has a pair of left and right sides projecting outward and extending in the longitudinal direction on both sides thereof, as shown in FIG. The joining rib pieces 2 and 2 are formed in parallel, and a pair of left and right rib pieces 2 and 2 jointly cooperate to form a liner 1.
Two parallel engaging recesses 3 and 3 are formed along the spiral joint portion 1a of A.

A strip-shaped joiner 4 is applied to join and integrate the spiral joint portion 1a of the liner 1A. The joiner 4 is elastically fitted to the engaging concave grooves 3 and 3 on the outer surface side. Are provided in parallel with each other, and the above-mentioned joining portion 1a can be joined and integrated by elastic engagement of the engaging ridges 3, 3, 5, 5.

The liner strip 1 is provided with an appropriate number of reinforcing rib pieces 6, ... T-shaped, Y-shaped, etc. parallel to the joining rib pieces 2, 2 on the outer surface side. The tip of the mark abuts against the inner surface of the sewer pipe a when the liner 1A is formed, and in cooperation with the rib pieces 2 and 2, a gap b required for filling the graft c is formed between the tip and the inner surface of the sewer pipe a. Form. 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.

In the sewer pipe a buried in a road with heavy traffic of heavy vehicles such as trucks, it is desirable to increase the strength of the inner lining in consideration of load resistance and impact resistance. Conventionally, this kind of construction method which can deal with such a demand has not been provided yet.

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

[0008]

SUMMARY OF THE INVENTION The present invention relates to an inner surface lining method for a pipe, wherein a liner strip having outwardly projecting joining rib pieces on both sides is spirally wound in the pipe to form a liner. An inner surface of the pipe characterized in that a reinforcing bar having spring elasticity is arranged in a spiral shape along the inner surface of the pipe, the liner is formed from the reinforcing bar, and then a backfill material is injected and filled into the back surface of the liner. Related to lining method.

According to the method of the present invention, in order to easily inject the backfill material into the back surface of the liner, a spacer for forming a backfill material injection passage extending in the tube axial direction is provided on the back surface side of the liner. Can be intervened.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to the accompanying drawings.

1 to 5 show the work procedure of the method of the present invention in the order of steps.

FIG. 1 shows a step of arranging the reinforcing bars 7. As the reinforcing bars 7, wire rods having various sectional shapes having spring elasticity, for example, piano wires having a circular sectional shape are used.

The reinforcing bars 7 are arranged in a spiral shape along the inner surface of the pipe a. The wire diameter of the reinforcing bar 7 and the pitch gap at the time of spiral bar arrangement may be appropriately determined in consideration of the final strength of the inner surface lining. Both ends of the reinforced reinforcing bar 7 are fixed to the pipe a by applying appropriate means.

FIG. 2 shows a step of installing the spacer 8 which is carried out subsequent to the bar arrangement step.

An example of the spacer 8 is shown in FIGS. The illustrated spacer 8 is a curved type and has an arcuate cross section as shown in FIG. 6, and has two vertical ribs 9 and 9 projecting outward and extending in the tube axial direction on the outer surface side, and further the vertical ribs. The lateral ribs 10 extend from 9 and 9 toward both side edges.
As shown in FIG. 7, a large number of lateral ribs 10 are formed at intervals in the tube axis direction.

The spacer 8, including the vertical ribs 9 and 9, is formed with a large number of openings 11 having a size through which the backfill material can pass so as to be dispersed throughout. The opening 11 need not be formed in the horizontal rib 10 as shown in the drawing, but may be formed in some cases.

As shown in FIG. 2, the spacers 8 are sequentially added in the axial direction of the pipe a, for example, in the upper region of the pipe a over the entire length of the pipe a so as to be positioned on the reinforcing bar 7 of the bar first. It is installed, and in this installed state, it is fixed in the pipe a by applying an appropriate fixing means such as an anchor bolt.

It is most preferable to install the spacer 8 in the upper region in consideration of the gravity flow of the backfill material, but it may be in the side region or the lower region.

The radius of curvature of the curved spacer 8 shown in FIG. 2 is slightly larger than the radius of curvature of the tube a, and a gap based on this difference in radius of curvature is formed between the curved spacer 8 and the tube a.

By the way, in this installed state, the diagonal cut surfaces 8a, 8a on both sides of the spacer 8 and the vertical and horizontal ribs 9,
The upper end of 10 is in contact with the inner surface of the pipe a. The backfill material injection passage 1 communicating between the two vertical ribs 9 in the pipe axis direction is provided.
2 is formed.

The spacer 8 is not limited to the curved shape shown in FIGS. 6 and 7, and has such a structure that the passage 12 can be formed on the outer surface side of the spacer 8 when installed in the pipe a. I wish I had it.

After the installation of the spacer 8 is completed, as shown in FIG. 3, the liner 1A is formed on the spacer 8 using the strip 1 and the joiner 4 in accordance with a conventional method (see FIGS. 8 to 10). .

After forming the liner 1A in this way, the hose 13 for injecting and filling the backfill material into the passage 12 formed between the vertical ribs 9 and 9 by the interposition of the spacer 8 as shown in FIG. Is inserted, and the backfill material c is injected and filled from the tip of the hose 13.

Backfill material c filled in the passage 12
Is injected and filled into the void b on the back surface side of the liner 1A through the openings 11 formed dispersedly on the entire surface of the spacer 8. Thus, the injection filling of such a backfill material,
By continuing the hose 13 while gradually moving rearward, the entire back surface of the liner 1A can be filled with the backfill material c, and the inner surface lining can be formed here over the entire length of the pipe a as shown in FIG. .

As shown in FIG. 5, the inner surface lining is composed of the liner 1A, the backfill material c and the reinforcing bar 7, and the reinforcing effect of the reinforcing bar 7 embedded in the backfill material c forms a high strength inner surface lining as a whole. It becomes possible to do.

[0026]

According to the method of the present invention, since the backfilling injected and filled in the back surface of the liner is reinforced by the reinforcing bar, a high-strength inner surface lining of the reinforced concrete structure can be obtained, and particularly load resistance and impact resistance are obtained. It is useful when applied to inner surface lining construction for sewer pipes, etc.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a reinforcing bar process showing an embodiment of a method of the present invention.

FIG. 2 is a transverse cross-sectional view showing a state of a spacer installation step of the same.

FIG. 3 is a view corresponding to FIG. 2 showing a formation state of a liner.

FIG. 4 is a vertical cross-sectional view showing the state of the step of injecting and filling the backfill material.

FIG. 5 is a cross-sectional view showing the structure of the inner surface lining formed by the method of the present invention.

FIG. 6 is a cross-sectional view showing an example of a spacer applied to the method of the present invention.

FIG. 7 is a plan view of the same.

FIG. 8 is an explanatory view schematically showing a situation of a liner forming step in the conventional method.

FIG. 9 is a partial cross-sectional view schematically showing the state of formation of the inner surface lining.

FIG. 10 is an explanatory view schematically showing the joining state of the spiral joint portion of the liner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liner strip 2 Joining rib piece 3 Engagement concave line 4 Joiner 5 Engaging convex line 6 Reinforcing rib piece 7 Reinforcing bar 8 Spacer 9 Vertical rib 10 Horizontal rib 11 Opening 12 Passage 13 Hose

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Kamide 7-6, Eizashi-cho, Tennoji-ku, Osaka-shi, Osaka Incorporated company, Osaka Waterproof Construction Co., Ltd. (72) Naoya Ozeki 1-2-2, Hatchobori, Chuo-ku, Tokyo No. 8 Inside Kubota Construction Co., Ltd. (72) Inventor Yuji Sakuma 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory Co., Ltd. (72) Kenichiro Imakubo 64, Ishizukita Town, Sakai City Osaka Prefecture Kubota Vinyl Pipe Factory Co., Ltd.

Claims (3)

[Claims] 1. An inner surface lining method for a pipe, wherein a liner strip having outwardly projecting joining rib pieces on both sides is spirally wound in the pipe to form a liner, wherein spring elasticity is provided along the inner surface of the pipe. Reinforcing the reinforcing bar in a spiral shape,
An inner surface lining method for a pipe, characterized in that the liner is formed from above, and then a backfill material is injected and filled into the back surface of the liner. 2. A spacer for forming a liner from the top of a reinforcing bar spirally arranged along the inner surface of the pipe and forming a backfill material injection passage that is linearly continuous in the pipe axial direction on the back side of the liner. 2. The inner surface lining method for a pipe according to claim 1, wherein the backing material is injected and filled into the back surface of the liner through the passages based on the spacers. 3. A spacer interposed on the back side of the liner is provided with an opening through which a backfill material can pass, and the spacer is a curved type and has a part of 360 ° of the outer peripheral surface of the liner on the inner side. Contact with the inner surface of the tube through two parallel vertical ribs that are in contact with each other on the outer surface side and project outward from the outer surface and extend in the tube axial direction. The inner surface lining method for a pipe according to claim 2, wherein a back-filling material injecting passage extending in a shape of a line is formed.