JP4368145B2 - Method for repairing defective portion of cable housing conduit and conduit material used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for repairing a defective portion of a cable housing pipe and a pipe material used therefor, and in particular, the necessity of an existing cable that is present in proximity to a defective portion of a cable housing pipe in which an existing cable is present. A method for repairing a defective portion of a cable housing pipe for forming a cable housing pipe in a short construction period and without an excavation work without adversely affecting the power transmission capacity due to heat, etc. It relates to pipe materials.
[0002]
[Prior art]
Conventionally, pipes such as concrete winding pipes, polycon pipes, pottery pipes, metal pipes such as cast iron, synthetic resin pipes such as vinyl chloride, etc. are laid at the places where various cables cross or traverse down the tracks and roads. A housing pipe is constructed, and a cable is inserted into the cable housing pipe so that the cable is not damaged by a vehicle passing through the track or the road or earth pressure.
[0003]
For the pipe material constituting this cable housing pipe, concrete wound pipes, polycon pipes, and ceramic pipes have been used for a long time, and these pipe materials are influenced by vibrations and loads generated by the running of the vehicle. In order to prevent the cable from being damaged, it may be necessary to repair the missing part of the cable housing pipe that has occurred in this way. there were.
[0004]
[Problems to be solved by the invention]
By the way, in many cases, there are many existing cables that are close to each other in the cable housing pipeline. Therefore, repair of the defective portion of the cable housing pipeline is based on the required transmission capacity of the existing cables that are in close proximity. It was necessary to carry out without adverse effects such as heat.
In addition, the repair of the defective part of the cable accommodation pipe line will not hinder the operation of railroad or road vehicles traversed or traversed by the cable accommodation pipe line. Therefore, it was necessary to carry out with a short construction period and without excavation work so as not to inconvenience.
[0005]
However, since there is no conventional method that satisfies all of the above conditions, a method that satisfies all of the above conditions, that is, close to the missing portion of the cable housing conduit where the existing cable is in close proximity. There is a demand for a construction method that can form cable housing pipes without the adverse effects of heat, etc. on the required transmission capacity of existing cables that exist, and with a short construction period and without excavation work. It was.
[0006]
An object of this invention is to provide the repair method of the defect | deletion part of the cable accommodation pipeline which satisfy | fills all the said conditions according to this request | requirement, and the pipeline material used for it.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the method for repairing a defective portion of a cable housing pipeline according to the present invention is a method for repairing a defective portion of a cable housing pipeline in which an existing cable is in close proximity . from the base end side of one of the cable accommodating conduit, the cylindrical film was placed a cylindrical film I cotton on the base end side of the other cable receiving duct, the said cylindrical film in by feeding air of a predetermined pressure While inserting a pipe material made of a cylindrical polyester nonwoven fabric impregnated with a thermosetting resin into the cylindrical film, and then applying tension to the longitudinal direction of the pipe material Further, it is characterized in that steam of a predetermined pressure is fed into the pipe material and cured by heating at a temperature of 70 ° C. or less while the pipe material is expanded to form a new cable housing pipe.
[0008]
The method of repairing the defect portion of the cable housing pipe is to install a cylindrical film along the repair path so as to straddle the existing cable housing pipe, and air of a predetermined pressure is put into the cylindrical film. The cylindrical film is swelled by feeding and inserted by pulling a pipe material made of a cylindrical polyester nonwoven fabric impregnated with a thermosetting resin into the cylindrical film, and then the longitudinal direction of the pipe material While applying tension to the pipe material, it is cured by heating at a temperature of 70 ° C. or less while inflating the pipe material by sending steam of a predetermined pressure into the pipe material to form a cable housing pipe. Therefore, it is short without adversely affecting the necessary transmission capacity of the existing cable close to the missing portion of the cable accommodating pipe line where the existing cable is close to the existing cable. In Engineering period, and, without digging work, it is possible to form a new cable receiving duct.
[0009]
In this case, in a state where the outer periphery of the pipe material made of polyester non-woven fabric is restrained by a non-expandable cylindrical sheet, steam of a predetermined pressure is sent into the pipe material so that the pipe material is expanded. can do.
[0010]
As a result, it is possible to prevent the pipe material from being overexpanded or even being destroyed.
[0011]
Further, the pipe material used in the repair method of the defect portion of the cable housing pipe of the present invention is a pipe material made of a cylindrical polyester nonwoven fabric impregnated with a thermosetting resin, and is a general-purpose unsaturated polyester resin. A polyester non-woven fabric is impregnated with a thermosetting resin comprising a curing agent composed of peroxycarbonate and / or cumene hydroperoxide and an accelerator composed of cobalt naphthenate, and the curing temperature is 70 ° C. Hereinafter, the curing time is 4 hours or less, and the storage stability is 2 weeks or more (in a 5 ° C. environment).
[0012]
This pipe material has a curing temperature of 70 ° C. or less, a curing time of 4 hours or less, and a storage stability of 2 weeks or more. Without any adverse effect due to heat, etc. on the necessary transmission capacity of the existing cable that is close to the missing part of the cable housing pipeline that exists, in a short construction period and without excavation work, A cable housing conduit can be formed, and the handleability is also good.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method for repairing a defective portion of a cable housing pipeline according to the present invention and a pipeline material used therefor will be described below with reference to the drawings.
[0014]
FIG. 1 shows an example of a cable housing pipe in which existing cables to which the defect repairing method for a cable housing pipe according to the present invention is applied are in close proximity.
[0015]
This cable housing pipe line has a structure in which a concrete winding pipe line P1 configured to house the cable C in the fume pipe P0 is constructed.
In such a cable housing pipe, if there is a construction failure at the time of construction or there is aged deterioration, the concrete winding pipe P1 in the fume pipe P0 will generate vibrations and loads caused by the running of the vehicle over a long period of time, The pipe is broken under the influence of groundwater or the like to generate a defect H0, and the cable C is exposed in the fume pipe P0.
In such a state, it is difficult to pull in and pull out the cable C, and the accommodated cable C is easily damaged. Therefore, the defective portion H0 of the cable housing conduit is repaired by the following procedure.
[0016]
As shown in FIG. 2A, first, the cylindrical film 1 is installed along the repair path so as to straddle the existing cable housing pipes H1 and H2.
The cylindrical film 1, the base end side of one of the cable receiving duct H1, through the defect H0 of cable housing conduit, the proximal end side of the other cable receiving duct H2, without damage It can be pulled in and inserted smoothly.
Further, this cylindrical film 1 has a thermosetting property in which the inner and outer surfaces described later are covered with cylindrical films 2a and 2b having gas barrier properties (for example, a laminated film of nylon and polyethylene) in the cylindrical film 1. In order to be able to smoothly pull in and pass through the pipe line material 2 made of a cylindrical polyester nonwoven fabric 2c impregnated with resin without damaging it, for example, polyethylene, polypropylene, nylon, etc., have strength, In addition, a synthetic resin sheet having a good slip property is used.
[0017]
And from the pressurized gas supply machine 3 which can selectively supply the air and vapor | steam installed in the one cable accommodation pipeline H1 side, the air of a predetermined pressure is sent in the cylindrical film 1, and a cylindrical film is expanded. A cylindrical polyester nonwoven fabric impregnated with a thermosetting resin, the inner and outer surfaces of which are covered with a cylindrical film 2a, 2b (for example, a laminated film of nylon and polyethylene) having a gas barrier property. The pipe line material 2 made of 2c is inserted (FIG. 2B).
In this case, the steam discharger 4 is installed on the other cable housing pipe H2 side.
[0018]
Next, while applying tension in the longitudinal direction of the pipe line material 2 so that the pipe line material 2 inserted into the cylindrical film 1 does not bend due to its own weight, the pressurized gas supply machine 3 enters the pipe line material 2. While steam of a predetermined pressure (although it is not particularly limited, a pressure of about 70 kPa) is sent to swell the pipe material 2, it does not adversely affect the existing cable C existing nearby. Thus, it hardens | cures by heating at the temperature of 70 degrees C or less, and forms a cable accommodation pipe line (it is although it does not specifically limit, for example, (phi) 100- (phi) 200mm, in this example, (phi) 125mm)) (FIG. 2). (C)).
In this case, the temperature control detects the outputs of the temperature sensors respectively disposed in the pressurized gas supply device 3 and the vapor discharge device 4, and controls the temperature of the steam fed from the pressurized gas supply device 3 based on this output. This can be done.
[0019]
In this case, when steam of a predetermined pressure is sent into the pipe line material 2 to cause the pipe line material 2 to bulge, the outer circumference of the pipe line material 2 made of a polyester non-woven fabric is preliminarily sewn in a cylindrical shape. A non-expandable cylindrical sheet (not shown) is disposed, and steam with a predetermined pressure is generated in the pipe line material 2 in a state where the pipe line material 2 is restrained by the non-expandable cylindrical sheet. The pipe material 2 can be bulged by being fed.
Thereby, the pipe line material 2 can be prevented from overexpanding and further to destruction.
[0020]
By the way, the pipe line material 2 made of a cylindrical polyester non-woven fabric impregnated with a thermosetting resin is applied to a repair method for a defective portion of a cable housing pipe line. Heat curing temperature is 70 ° C or less so that cable C will not be adversely affected by heat. (2) Preparation work, drawing work of cylindrical film 1 and conduit material 2, cleaning up after curing, etc. for 1 day The curing time is 4 hours or less because it is necessary to finish with (3) Thermosetting with the addition of a curing agent between impregnation of the thermosetting resin into a cylindrical polyester nonwoven fabric and use at the construction site It is necessary that the storage stability is 2 weeks or more (in an environment of 5 ° C.) so that the functional resin does not spontaneously cure.
In addition, it is also necessary that the heating temperature of curing is 70 ° C. or less so that the heat of chemical reaction at the time of curing does not adversely affect the existing cable C existing nearby.
[0021]
As the thermosetting resin satisfying the above conditions, general-purpose unsaturated polyester resin, peroxycarbonate (Bis (4-t-butylcyclohexyl) dicarbonate (TCP)) and / or cumene hydroperoxide (CHP)) are used. The thermosetting resin which mix | blends the hardening | curing agent which becomes and the promoter which consists of cobalt naphthenate (N-Co) can be shown.
More specifically, 100 parts by weight of a terephthalic acid-based general-purpose unsaturated polyester resin, 0.5 parts by weight of peroxycarbonate (Bis (4-t-butylcyclohexyl) dicarbonate (TCP)) and cumene hydroperoxide (Cumene hydroperoxide ( CHP)) a non-woven fabric made of polyester (thickness: 3.CHP)) and a thermosetting resin comprising 0.5 parts by weight of a curing agent and 0.15 parts by weight of an accelerator consisting of cobalt naphthenate (N-Co). (1) Heat curing temperature is 60 ° C., (2) Curing time is 3 hours or less, (3) Storage stability is 2 weeks or more (under 5 ° C. environment), (4) Curing heat generation A temperature of 65 ° C. (measured with a plate having a thickness of 3 mm) could be realized.
And the pipe material 2 obtained in this way has sufficient strength as a cable housing pipe after curing (as the required quality of the present embodiment, as the total length 11 m of the defective part H0 of the cable housing pipe, It was confirmed that no damage occurred even when a moment of 197.6 kN · cm was applied.
In addition, the other characteristic value of this pipe line material 2 is as follows.
[0022]
(1) Bending strength (JIS K-7171): 7.7 kN / cm ²
(2) Flexural modulus (JIS K-7171): 342 kN / cm ²
(3) Tensile strength (JIS K-7113): 4.2 kN / cm ²
(4) Line load (flat) (JSWAS K-1): 4.03 kN / m
[0023]
As mentioned above, although the repair method of the defect | deletion part of the cable accommodation pipe line of this invention and the pipe line material used therewith were demonstrated based on the Example, this invention is not limited to the structure described in the said Example. The configuration can be changed as appropriate without departing from the spirit of the invention.
[0024]
【The invention's effect】
According to the method for repairing a defect portion of a cable housing pipe of the present invention, a cylindrical film is installed along the repair path so as to straddle an existing cable housing pipe, and a predetermined film is formed in the cylindrical film. The cylindrical film is swelled by sending air under pressure, and inserted into the cylindrical film by drawing a pipe material made of a cylindrical polyester nonwoven fabric impregnated with a thermosetting resin. While applying tension in the longitudinal direction of the material, it is cured by heating at a temperature of 70 ° C. or less while steam of a predetermined pressure is sent into the pipe material to swell the pipe material, thereby forming a cable housing pipe As a result, adverse effects of heat, etc., on the required transmission capacity of existing cables that are close to existing cable housing conduits that are close to existing cables In addition, the cable housing conduit can be formed in a short construction period and without excavation work, thereby repairing the defective portion of the cable housing conduit where the existing cable is in close proximity. This can be done without interfering with cable operation.
[0025]
In addition, in a state where the outer periphery of the pipe material made of polyester non-woven fabric is constrained by a non-expandable cylindrical sheet, the pipe material is expanded by sending steam of a predetermined pressure into the pipe material. Thus, it is possible to prevent the pipe material from being overexpanded or even being destroyed.
[0026]
In addition, according to the pipe material of the present invention, the curing temperature is 70 ° C. or less, the curing time is 4 hours or less, and the storage stability is 2 weeks or more. Therefore, in a short construction period and without damaging the required transmission capacity of the existing cable close to the missing part of the cable housing pipe line where the existing cable is close to the existing cable, The cable housing conduit can be formed without any construction work, and the handleability is also good.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an example of a cable housing pipe in which existing cables to which the defect repairing method for a cable housing pipe according to the present invention is applied are close to each other.
FIG. 2 is an explanatory view showing a repair method for a defect portion of a cable housing conduit according to the present invention.
[Explanation of symbols]
C Cable H0 Defect in cable housing pipe H1 Cable housing pipe H2 Cable housing pipe 1 Cylindrical film 2 Pipe material 3 Pressurized gas supply machine 4 Steam release machine

Claims (3)

In the repair method of the missing part of the cable housing pipeline where the existing cable is close to the base, the proximal side of the other cable housing pipeline from the proximal side of one cable housing pipeline with the missing part in between It established the cylindrical film I Niwata, causes bulge cylindrical film to said cylindrical film in by feeding air of a predetermined pressure, the cylindrical impregnated with thermosetting resin in the cylindrical film in The pipe material made of polyester non-woven fabric is inserted by pulling it in, and while applying tension in the longitudinal direction of the pipe material, steam of a predetermined pressure is sent into the pipe material to swell the pipe material A method for repairing a defective portion of a cable housing pipe, which is cured by heating at a temperature of 70 ° C. or less to form a new cable housing pipe.   In a state where the outer periphery of the pipe material made of polyester non-woven fabric is constrained by a non-expandable cylindrical sheet, steam of a predetermined pressure is sent into the pipe material to swell the pipe material. The repair method of the defect | deletion part of the cable accommodation pipe line of Claim 1.   A pipe material made of a non-woven fabric made of cylindrical polyester impregnated with a thermosetting resin used in the method for repairing a defective portion of a cable housing pipe according to claim 1, wherein A polyester non-woven fabric is impregnated with a thermosetting resin composed of a curing agent composed of carbonate and / or cumene hydroperoxide and an accelerator composed of cobalt naphthenate, with a curing temperature of 70 ° C. or less and a curing time. Has a storage stability of 2 weeks or longer.

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