JP2001020364A - Lined pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the period of construction, reduce the construction cost and improve flow capability of a pipeline by forming many through holes in a lining material and fitting a valve opened at prescribed pressure in the through holes. SOLUTION: Through holes 6 formed in a lining material 1 are provided for letting infiltrated water 5 escape inside the lining material 1 through the through holes 6 by opening valves 4 mounted in the through holes 6 when a water stop of primary lining 3 is broken and external water pressure is applied to the lining material 1, thereby preventing buckling of the lining material 1. The through holes 6 are formed in the upper positions of the lining material 1. Thus, except a rainfall, a fluid flowing through a pipeline does not touch through hole forming parts, as the valve 4 fitted in the through holes 6, it is not necessary to use a valve having a complicated mechanism such as a check valve, opening of the valve 4 mounted in the through holes is not obstructed by pressure of a fluid flowing through the pipeline, and external water pressure applied to the lining material 1 can be released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary lining technology in a shield tunnel, for example, a sewerage sewage pipe shield tunnel having a diameter of about 1200 to 3000 mm.
The present invention relates to a lined pipe in which a fiber material is impregnated and cured with a synthetic resin inside a primary lining.

[0002]

2. Description of the Related Art Conventionally, for example, a bore diameter of 1200 to 300
For construction of a sewer sewage pipe shield tunnel of about 0 mm, a steel segment shield method is widely used. In the steel segment used in the steel segment shield method, a steel lattice having a splayed shape appears on the inner surface. In the steel segment shield method, a concrete layer having a thickness of about 20 to 30 cm is formed on the inner surface of the steel segment. The secondary lining to build is done.

[0003] Such a secondary lining requires the same period of time as the primary lining, so that the secondary lining not only lengthens the period but also increases the total cost. there were.

In a sewer pipe, hydrogen sulfide is easily generated from sewage flowing through the pipe by the action of an anaerobic bacterium, and this hydrogen sulfide is changed to sulfuric acid by the action of an aerobic bacterium. Sulfuric acid causes a chemical reaction with the cement component of the secondary lining concrete layer, causing deterioration of the concrete and shortening the service life of the sewer pipe.

Incidentally, in recent years, the water stopping technology of the primary lining in the steel segment shield method and the like has been improved, and the necessity of providing the secondary lining for stopping the water has been almost eliminated. As a problem, the secondary lining only requires the function of preventing corrosion of the steel segment and increasing the chemical resistance of concrete.

As a method for solving such a problem, a soft lining method such as a hose lining method in which various materials are used to form a thin lining inside the primary lining has been proposed instead of the secondary lining with concrete. This soft lining method is known as a method for rehabilitating existing sewer pipes.
No. 73, a flexible tubular body having a predetermined thickness made of a fibrous material such as a non-woven fabric impregnated with a curable resin is inserted upside down into a pipe such that the inner and outer surfaces are reversed. In addition, a material in which this flexible tubular body is used as a lining material and adheres and cures to the inner surface of a pipe of a sewer has been put to practical use.

[0007] This soft lining method generally presupposes measures against infiltration of groundwater and the like in existing sewer pipes. Therefore, only the hardened lining material on the inner side serves as a sewer pipe. In order to achieve this, the lining material is designed to have a thickness that can withstand intrusion water, that is, external water pressure. In the case of performing such a design, assuming a sewer pipe having a diameter of about 2000 mm buried at a depth of about 10 m underground, the thickness of the lining material is required to be about 40 mm.

In this case, the cost of the soft lining method is lower than that of the conventional concrete secondary lining.
There was a problem that it became very expensive.

Further, if the lining is made with a thin lining material in order to reduce the cost, the lining material may buckle due to external water pressure, which may cause an accident such as blockage of a sewer pipe. .

[0010]

SUMMARY OF THE INVENTION In view of the problems of the conventional secondary lining and soft lining method using concrete, the present invention employs a new construction for the lining material, thereby shortening the construction period. The construction cost is low, the flow capacity of the pipeline is good, the chemical resistance and the abrasion resistance are durable, the slope of the pipeline can be corrected, and the place where unevenness is corrected can be applied. Provided is a lined pipe that can prevent buckling of the lining material by allowing infiltration water to escape to the inside of the lining material when the waterproofing of the primary lining is broken and external water pressure is applied to the lining material. The purpose is to:

[0011]

In order to achieve the above object, a lined pipe according to the present invention comprises a liner made by impregnating and curing a fibrous material with a curable resin on an inner surface of a primary lining or an existing line. In the lined pipe that is provided, a large number of through holes are formed in the liner,
A valve that opens at a predetermined pressure is attached to the through hole.

For example, when the water blocking of the primary lining is broken and external water pressure is applied to the lining material, the valve attached to the through-hole formed in the lining material is opened,
The buckling of the lining material is prevented by allowing infiltration water to escape to the inside of the lining material through the through hole.

In this case, the through hole can be formed at a position higher than two thirds of the lining material.

[0014] With this arrangement, the fluid flowing down the inside of the conduit does not normally come into contact with the through-hole forming portion except during rainfall or the like, and the valve attached to the through-hole has a complicated mechanism such as a check valve. There is no need to use a valve, and the pressure of the fluid flowing down the pipeline obstructs the opening of the valve attached to the through-hole, and a situation occurs in which the external water pressure applied to the lining material cannot be released. Can be prevented.

Further, the through hole can be formed except for the vicinity of the top of the lining material.

Thus, it is possible to avoid a highly corroded portion of the pipeline, and it is not necessary to employ a special mechanism and a material made of a material having particularly excellent corrosion resistance for the valve and the like. Since the operation of forming the through hole itself is difficult to perform, the workability can be improved by forming the through hole except for the vicinity of the top.

Further, a foreign matter clogging prevention mechanism can be provided in the through hole.

Thus, it is possible to prevent a situation in which the external water pressure applied to the lining material cannot be released due to the foreign matter clogging the through hole.

In addition, the inner surface of the primary lining or the inner surface of the existing pipeline,
The outer surface of the lining material can be in a non-adhered state.

Thus, regardless of the position where the external water pressure is applied, the valve attached to the through hole formed in the lining material is opened, and the infiltration water can escape to the inside of the lining material through the through hole. it can.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a lined pipe according to the present invention.

One embodiment of the lined conduit of the present invention is shown in FIGS. This pipe line is composed of a lined pipe in which a fiber material is impregnated and cured with a curable resin on the inner surface of a primary lining 3 composed of a composite segment. Location, preferably
In a position 2 above two-thirds of the lining material, a large number of through holes 6
The through hole 6 is provided with a valve 4 that opens at a predetermined pressure.

The lining material 1 has a thickness of several mm to 20 mm, for example.
mm, preferably about 5 mm synthetic fiber or glass fiber non-woven fabric 11 such as polyester, and a thickness of 0.2 mm to 0.5 mm heat-sealed inside the non-woven fabric 11
And a coating 12 made of a synthetic resin sheet such as linear low-density polyethylene.
Is hardened by an impregnated hardening resin so as to be self-supporting. In addition, as the lining material 1, other cloth, for example, a woven cloth or a knitted cloth may be used instead of the nonwoven cloth 11, or a woven cloth or the like is interposed between the nonwoven cloth 11 and the coating 12. You can also. The coating 12 may or may not be integrated with the fiber layer such as the nonwoven fabric 11 or woven cloth. If the coating 12 is not integrated, the coating 12 is removed from the fiber layer after the curable resin is cured. I do.

On the other hand, when the water blocking of the primary lining 3 is broken and external water pressure is applied to the lining material 1, for example, the through hole 6 formed in the lining material 1 is provided with the valve 4 attached to the through hole 6.
Are provided to allow the infiltration water 5 to escape to the inside of the lining material 1 through the through holes 6, thereby preventing the lining material 1 from buckling. For this reason, the through-hole 6 is not particularly limited (it depends on the surrounding ground where the pipe is buried), but one side (in the case of a rectangle) or a diameter (in the case of a circle) of about 5 cm is used. It is formed at a rate of about one place in 2 m ² .

The through-hole 6 is formed at an upper position of the lining material 1, preferably at a position 2 above two-thirds of the lining material 1. Normally, the fluid flowing down in the pipeline does not come into contact with the formation portion 2 of the through hole 6, and there is no need to use a valve having a complicated mechanism such as a check valve as the valve 4 attached to the through hole 6, Further, the opening of the valve 4 attached to the through hole 6 is obstructed by the pressure of the fluid flowing down the pipeline to prevent a situation where the external water pressure applied to the lining material 1 cannot be released. Can be.

The through-hole 6 is preferably formed except for the vicinity of the top of the lining material 1, whereby it is possible to avoid a severely corroded portion of the pipeline, and the valve 4 and the like are particularly excellent in corrosion resistance. It is not necessary to adopt a special mechanism and a member of a material, and since the operation itself of forming the through hole 6 near the top of the lining material 1 is difficult, the through hole is formed except for the vicinity of the top. By doing so, workability can be improved.

It is preferable that the inner surface of the primary lining 3 and the outer surface of the lining material 1 are maintained in a non-adhered state, so that water can freely enter between the lining material 1 and the primary lining 3. The valve 4 attached to the through hole 6 formed in the lining material 1 is opened irrespective of the position where the outside water pressure is applied and the infiltrated water 5 can be circulated through the through hole 6. You can escape inside.

In this embodiment, the through hole 6 is formed by making a U-shaped cut in the lining material 1 as shown in FIGS. 4 is used. In this case, the tongue-shaped valve 4 is formed such that its distal end is located downstream. The tongue-shaped valve 4 is deformed as shown in FIG. 2C, for example, when the water stoppage of the primary lining 3 is broken and external water pressure is applied to the lining material 1. It is made to escape inside the lining material 1.

The shapes, configurations, and the like of the valve 4 and the through-hole 6 are not particularly limited. For example, as shown in FIG. 3, various shapes can be adopted. In FIG. 3, the solid line indicates the outer edge of the through-hole 6, and the dotted line indicates the inner surface of the coating 12 made of a synthetic resin sheet such as linear low-density polyethylene constituting the lining material 1 so as to cover the through-hole 6. 7 shows a broken portion of the film 40 constituting the valve 4 integrated by such a method. The film 40 constituting the valve 4 is made of a thin synthetic resin film such as a linear low-density polyethylene having a thickness of 0.02 to 0.05 mm, and is broken by an external water pressure of about 0.02 to 0.03 MPa. Use what you do.

More specifically, the through hole 6 is formed by making a U-shaped cut in the lining material 1, and a film 40 made of synthetic resin is formed on the surface of the lining material 1 so as to cover the through hole 6. It is arranged so that the tongue-like piece is used together with the film 40 as the valve 4 (in this case, the cut portion can be sealed by being fused with a thermoplastic resin or the like). (FIG. 3A), the through-hole 6 is formed by making a semicircular cut in the lining material 1, and a synthetic resin film 40 is disposed on the surface of the lining material 1 so as to cover the through-hole 6. The tongue-like piece may be used as the valve 4 together with the film 40 (in this case, the cut portion may be fused and closed with a thermoplastic resin or the like) (FIG. 3 ( b)), the through hole 6 is cut into the lining material 1 in a rectangular shape. Formed by Kukoto, through film on the surface of the lining material 1 made of synthetic resin so as hole 6 to cover 40
Is arranged to form the valve 4 (FIGS. 3 (c) to 3 (e)), and the through-hole 6 is formed by cutting the lining material 1 into a circular shape to cover the through-hole 6. The valve 4 is formed by disposing a synthetic resin film 40 on the surface of the lining material 1 as shown in FIG.
FIG. 3 (h) can be obtained.

The thin film portion 40a for guiding is provided on the synthetic resin film 40 constituting the valve 4 so that the film 40 is surely split when a predetermined external water pressure is applied to the lining material 1. (FIG. 3D, FIG.
(G)), a thin groove 40b is formed (FIGS. 3 (e) and 3).
(H))

The shape, configuration, etc. of the valve 4 and the through hole 6 are the same as those described above, and as shown in FIG.
A through-hole 6 may be formed in the through hole 6 and a plug-shaped valve 7 made of synthetic resin may be attached to the through-hole 6 from the inside. In the valve 7, a thin portion or a groove 7a for guiding can be formed so that the valve 7 is surely torn when a predetermined external water pressure is applied to the lining material 1.

Further, a foreign matter clogging prevention mechanism 8 is provided in the through hole 6.
Thereby, it is possible to prevent a situation in which the foreign water pressure applied to the lining material 1 cannot be released due to the foreign matter clogging the through hole 6. As the foreign matter clogging prevention mechanism 8, as shown in FIG. 4A, a thin synthetic resin film blocking film is formed on the back side of the through hole 6 of the lining material 1, and as shown in FIG. , A hemispherical protruding piece 7b having an open center at the back of the valve 7
Can be formed.

Next, an example of a construction method in which the primary lining 3 is performed using the composite segment and the soft lining is performed as the secondary lining with the lining material 1 in which the curable resin is impregnated and cured in the fiber material. (1) A primary lining with a smooth inner surface is performed using a composite segment. (2) If the gradient of the primary lining is inappropriate or uneven, the flowability of the pipeline will be reduced. Therefore, it is corrected by applying mortar or the like. (3) A curable resin (unsaturated polyester resin) is applied to the lining material 1. Specifically, as shown in FIG. 5, the curable resin P is injected into the inside of the lining material 1 in which the coating 12 is formed on the outside of the nonwoven fabric 11 formed into a cylindrical shape by sewing, as shown in FIG. Then, the curable resin P is leveled by passing the lining material 1 through the application roller 13.
A curable resin is uniformly applied to the nonwoven fabric 11 inside the lining material 1. (4) Insert the lining material into the pipe. The lining material 1 impregnated with a curable resin on the inner surface is folded in a zigzag manner as shown in FIG. 7, and a portion of the lining material 1 that is exposed on the surface is sufficiently coated with a lubricant such as silicon oil. (5) Put the lining material 1 in the bag 15 and pull it to the lining position. The lining is a continuous reversing machine 14
(For example, see Japanese Patent Application Laid-Open No. 9-48073),
As shown in FIG. 8A, the lining material 1 is
Of the lining material 1 is folded back and fixed to the annular fixing bracket 14b. Then, the lining material 1 is reversed in the primary lining 3 by introducing compressed air from the air injection port 14 c of the continuous reversing machine 14. (6) The curable resin is cured. Specifically, FIG.
As shown in (b), the inner pressure of the lining material 1 is reduced to 2 in a state in which the reversing folded portion of the lining material 1 is brought into contact with the reaching bracket 16.
The curable resin P impregnated in the lining material 1 is cured while holding for 1 to 3 days. At this time, the control belt 17 is connected to the end of the lining material 1 so that a constant tension is applied. The curing of the curable resin P may be performed at room temperature, or may be performed by heating with steam or hot water, irradiating ultraviolet rays, or the like, depending on the curable resin P. (7) A through hole 6 is formed in the cured lining material 1. (8) The valve 4 is attached to the through hole 6. (9) The terminal treatment of the lining material 1 is performed by a method such as application of a high-strength cement or resin mortar or fixing by installing a metal ring or the like.

As described above, the case where the lining material 1 in which the fibrous material is impregnated and cured with the curable resin is arranged on the inner surface of the primary lining 3 composed of the composite segment has been described for the lined pipe of the present invention. The application object of the present invention is not limited to this. For example, similarly, by arranging a lining material obtained by impregnating and curing a fibrous material with a curable resin on the inner surface of the existing pipeline, it is used for repairing the existing pipeline. can do.

[0036]

According to the lined pipe of the present invention, for example, when the water stoppage of the primary lining is broken and external water pressure is applied to the lining material, the valve attached to the through hole formed in the lining material. Is opened, and by allowing infiltration water to escape to the inside of the lining material through the through hole, buckling of the lining material can be prevented. Since the lined pipe of the present invention does not receive a large external water pressure on the liner in this way, the thickness of the liner can be designed to be thin regardless of the depth of the line buried underground. , Construction costs can be reduced. In addition, the lined pipe made by arranging this fiber material with a hardening resin impregnated and hardened has a good flowability of the pipe, improved roughness coefficient, chemical resistance and abrasion resistance. And has the advantage of being able to make up where the slope of the pipeline has been corrected and the unevenness has been corrected. In addition, since the thickness of the lining material can be designed to be thin, in the case of pipelines having the same outer diameter, the flow rate design becomes larger, and the outer diameter of the shield at the time of pipeline design can be reduced. , Construction costs can be reduced. Furthermore, compared to the conventional secondary lining with concrete, since the length of construction per day is longer, the construction period can be shortened, and thus the construction cost can be reduced.

By forming the through-hole at a position higher than two-thirds of the lining material, the fluid flowing down the inside of the pipeline normally comes into contact with the formed portion of the through-hole except during rainfall and the like. There is no need to use a valve with a complicated mechanism such as a check valve for the valve attached to the through-hole, and the pressure of the fluid flowing down the pipeline causes the opening of the valve attached to the through-hole. Can be prevented, and a situation in which the external water pressure applied to the lining material cannot be released can be prevented.

Further, by forming the through-hole except for the vicinity of the top of the lining material, it is possible to avoid a severely corroded portion of the conduit, and to provide a valve or the like with a special mechanism and a member made of a special material having particularly excellent corrosion resistance. It is not necessary to adopt the above, and since the work itself of forming the through hole is difficult to perform near the top of the lining material, the workability is improved by forming the through hole except for the vicinity of the top. be able to.

Further, by providing the through hole with the foreign matter blocking prevention mechanism, it is possible to prevent a situation in which the foreign water pressure applied to the lining material cannot be released due to the foreign matter clogging the through hole.

In addition, the inner surface of the primary lining or the inner surface of the existing pipeline,
By making the outer surface of the lining material non-adhered, the valve attached to the through hole formed in the lining material opens regardless of the position where the external water pressure is applied, and through the through hole,
Infiltration water can escape to the inside of the lining.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a lined pipe of the present invention.

2 (a) is a cross-sectional view showing a portion where a through hole is formed in a normal state, FIG. 2 (b) is a bottom view of FIG. 2 (a), and FIG. 2 (c) is a cross-section showing a state where a valve is opened. FIG.

FIG. 3 is an explanatory view showing a portion where a through hole is formed.

FIG. 4 is an explanatory view showing a portion where a through hole is formed.

FIG. 5 is an explanatory view showing a lining material.

FIG. 6 is an explanatory diagram showing a method of impregnating a lining material with a curable resin.

FIG. 7 is an explanatory view showing a folded state of the lining material.

FIG. 8 is an explanatory diagram showing a lining method using a lining material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lining material 11 Nonwoven fabric 12 Coating 2 Forming part of through hole 3 Primary lining (existing pipeline) 4 Valve 40 Film 5 Infiltration water 6 Through hole 7 Valve 8 Foreign matter clogging prevention mechanism

 ──────────────────────────────────────────────────続 き Continuation of front page (71) Applicant 392008884 Ashimori Engineering Co., Ltd. 4-3-16-1 Nihonbashi Muromachi, Chuo-ku, Tokyo (72) Inventor Kazuyoshi Furukawa 4-3-55 Denho 4-chome, Konohana-ku, Osaka-shi, Osaka Konoike-Gumi Co., Ltd. (72) Inventor Shigeo Hayashi 4-55, Kodena-ku, Osaka-shi, Osaka, Japan 4-72, Konoike-Gumi Co., Ltd. (72) Inventor Joji Murakami 3-241-1, Otsukacho, Takatsuki-shi, Osaka Inside the Technical Research Institute (72) Masahiro Seshita 3-10-18 Kitahorie, Nishi-ku, Osaka City, Osaka Prefecture Inside Ashimori Industry Co., Ltd. (72) Inventor Yagi Isaburo 4-3-16-1 Nihombashi Muromachi, Chuo-ku, Tokyo Ashimori Engineering Co., Ltd. F term (reference) 2D055 CA03 KB07 KB11 KB16 LA01 2D063 BA03 BA19

Claims (5)

[Claims] 1. A lined pipe in which a fiber material is impregnated and cured with a curable resin on an inner surface of a primary lining or an inner surface of an existing pipe, wherein a number of through holes are formed in the liner. And a valve that opens at a predetermined pressure is attached to the through-hole. 2. The lined line according to claim 1, wherein the through hole is formed at a position higher than two thirds of the liner. 3. The lined pipe according to claim 1, wherein the through hole is formed except for the vicinity of the top of the liner. 4. The lined pipe according to claim 1, wherein a foreign matter clogging prevention mechanism is provided in the through hole. 5. The lined pipeline according to claim 1, wherein the inner surface of the primary lining or the inner surface of the existing pipeline and the outer surface of the lining material are in a non-adhered state.