JP2000299914A - Repairing method for pole, sheet belt and cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair a damaged part of a concrete pole simply in a short time while recovering strength. SOLUTION: Periphery of the part 2 of a concrete pole 1 damaged over aging is cut to expose an iron rod which is then subjected to processing for removing and preventing rust. The cut is then filled with a filler 4 and a primer 5 is applied to the entire circumference of the pole in the region of the damaged part. After the primer 5 is dried, a tubular sheet belt 6 made of glass fibers is wound around the pole 1 through a resin paint and applied with a finish urethane resin paint 8. According to the method, the damaged part can be repaired while recovering strength of the pole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to concrete pillars for supporting electric train lines and concrete power poles for supporting electric power supply lines to general households and electric wires for telegraph telephones. TECHNICAL FIELD The present invention relates to a method of easily and quickly reinforcing strength deterioration due to damage such as chipping and extending the life thereof, and a technique of a seat belt and a cap used for the method.

[0002]

2. Description of the Related Art Water poles, such as concrete poles for supporting train lines and concrete poles for supporting power supply lines and telephone lines, have been exposed to wind and rain for many years, so that rainwater infiltrates from seams, and the cement component is reduced. It is reduced and only aggregates such as gravel are clogged. For this reason, many concrete utility poles have been neutralized, causing damage such as cracks, defects, and spalling. Conventionally, as a countermeasure, repair or repair has been performed by injecting a resin material into the damaged portion or filling with a resin mortar.

[0003]

However, in the above-mentioned conventional repair method, even if a damaged portion such as a crack, a defect, or a spall can be repaired, deterioration of the strength of the telephone pole itself cannot be recovered. Therefore, even when repairing damage such as cracks, defects, and spalling, the strength of the utility pole itself is not reinforced, and the service life of the utility pole itself will be shortened. This has to be done, and the labor burden and cost required for the work are enormous, which is a problem. Moreover, if the poles are neglected, the concrete poles that support the train lines will cause the poles to incline, causing misalignment of the trolley wires and damaging the pantograph that receives power from the trolley wires. Since it will hinder the running, it is necessary to replace the utility pole of the utility pole whose strength is severely deteriorated due to damage or the like even during a short use period.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems and has been improved and eliminated. The present invention can easily and quickly restore the strength of a damaged portion of a concrete electric pole and repair it. It is an object of the present invention to provide a technique of a glass fiber seat belt and a cap for repairing a utility pole used in the method.

[0005] In order to solve the above-mentioned problems, the means of claim 1 adopted by the present invention is to remove rust from a reinforcing bar exposed by cutting around a damaged portion due to aging of a concrete power pole and the like. A glass fiber seat belt that is rustproofed, fills the cut part with filler, applies a primer to the entire circumference of the utility pole in the area of the damaged part, dries the primer and creates a cylindrical shape via resin paint This is a method of repairing electric poles, characterized by winding and pasting on a telephone pole and finishing by applying a urethane resin paint. According to the present invention, the damaged part can be repaired by cutting the periphery of the damaged part, performing rust prevention processing on the reinforcing bar, and filling the filler. Then, after the primer treatment, the glass fiber seat belt is wound around and adhered to the utility pole, thereby making it possible to recover the strength deterioration of the utility pole. That is, by integrating the glass fiber seat belt around the damaged portion of the utility pole, excellent reinforcement can be obtained by the strength increasing function of the seat belt itself. The overcoating of the urethane resin paint is based on the consideration of weather resistance.

The means of claim 2 adopted by the present invention is as follows:
A glass fiber sheet is attached to a first resin layer, a second resin layer is provided thereon, and a second glass fiber sheet is attached, and the first and second glass fiber sheets are attached. Is a glass fiber seat belt for electric pole repair, which is attached in a direction crossing each other. By crossing the first and second layers of glass fiber sheets with each other, it is possible to compensate for the drawbacks of the glass fiber sheets having directionality in the strength-up function and realize excellent strength in any direction. It is possible.

According to a third aspect of the present invention, there is provided a glass fiber seat belt for repairing utility poles according to the second aspect, which is formed in a cylindrical shape. When a glass fiber seat belt for repair is wound around a utility pole, if it is manufactured flat, the glass fiber of the seat belt is bent and cut off halfway, and the strength-up function is reduced. In this case, the seat belt is formed in a cylindrical shape, and such a situation does not occur even when the seat belt is wound around a utility pole.

According to a fourth aspect of the present invention, a glass fiber sheet is attached to a first resin layer, a second resin layer is provided thereon, and a second glass fiber sheet is attached. The first and second glass fiber sheets are attached in a direction crossing each other. It is a cap for repair. According to the present invention, the head can be reinforced by covering the head of the utility pole.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings. FIG. 1 is a process diagram showing an order of repairing a crack-defective portion (hereinafter, simply referred to as a crack) 2 of a pole portion of a utility pole 1 according to a first embodiment of the present invention. Figure (B) of FIG.
As shown in the figure, first, the periphery of the crack 2 is cut into a V-shape along the crack by a diamond cutter or the like to form a concave portion 3. The damaged portion is dropped as much as possible with a keren hammer or the like so that after repairing, there is no cause for cracks, defects, etc. to progress from the portion. Further, the V-shaped cut is performed to a position where the corroded reinforcing bar inside the crack 2 is exposed, the rust of the reinforcing bar is removed by a grinder or the like, and the progress of the rust corrosion is suppressed. A rust preventive for improving the adhesion of the filler 4 to be performed is applied.
Such an operation is the same when the damage to the utility pole 1 is peeling.

Next, as shown in FIG. 1C, the recess 3 is filled with a filler 4 using a metal iron, a wooden spatula or the like. The filling is applied as evenly as possible. If any irregularities are present after the filler is dried, it is flattened with sandpaper or the like. Then, an FP primer (a primer containing an epoxy resin as a main component) 5 is applied to a region indicated by a hatched portion in FIG. This FP primer 5
This is a two-pack type resin coating using a modified aliphatic polyamine as a curing agent, and has the function of maintaining the strength of existing concrete columns and maintaining the adhesion strength of the resin coating applied thereafter. After drying of the FP primer, an epoxy resin paint is used as a main agent, and an FR resin, which is a two-pack resin paint using an epoxy isocyanate as a curing agent, is evenly applied. This FR resin has a function as a resin adhesive. The ratio between the main agent and the curing agent is
Normally, the ratio of the main agent to the curing agent may be set to 2: 1. However, since the curing reaction state differs depending on the temperature difference depending on the season, the setting may be changed according to the season. As a guideline of the change, in the case of summer, the ratio of the main agent to the curing agent should be 2: 0.9 to 0.85, and in the winter period, the ratio of the main agent to the curing agent should be 2: 1.05 to 1.1. This is because if the ratio of the curing agent is lower than these values, there is a problem that the work is hindered because it is difficult to cure, and if the ratio of the curing agent exceeds these values, there is a problem similar to the above. is there.

After that, as shown in FIG. 2, the seatbelt 6 made of glass fiber and formed into a cylindrical shape is formed.
As shown in FIG. 1 (D), this is wound around a region where the FR resin is applied, and is attached, for example, by binding the upper and lower central portions with a vinyl tape 7 or the like to attach the seat belt 6. Make sure it runs smoothly. Finally, as shown in FIG. 1E, a urethane resin paint 8 is overcoated to finish. The urethane paint 8 is for preventing the seat belt 6 from being deteriorated by ultraviolet rays due to sunlight.

With the telephone pole repaired in this way,
The seat belt 6 made of glass fiber can reinforce the strength of the area where the crack 2 is formed, and the service life of the utility pole 1 can be extended. In the repair work of the electric pole 1, since the seat belt 6 made of glass fiber is rounded and formed into a cylindrical shape,
This can be easily performed even by non-experts.

A method of manufacturing the seat belt 6 made of glass fiber will be described with reference to FIGS. First, as shown in FIG. 3, a glass plate 9 is used as a base in order to smoothly perform temperature control and removal of a molded product.
A vinyl sheet 10 is stuck on the glass plate 9. The vinyl sheet 10 has a purpose of preventing the resin material from sticking to the glass plate 9 at the time of molding and a purpose of protecting the molded product, and is peeled and removed at the time of construction.

After that, the first layer of FR resin 11 is applied on the vinyl sheet 10 and the glass fiber sheet 12
Paste. Then, air contained between the fibers of the glass fiber sheet is extracted using a defoaming roller. Subsequently, a second-layer FR resin 13 is applied, and a glass fiber sheet 14 is attached thereto in a direction crossing the direction of the first-layer glass fiber sheet 12, and the glass fiber sheet is removed using a defoaming roller. Extract the air contained between the fibers.

Next, after a predetermined reaction time according to the season, the entire molded body 15 including the vinyl sheet 10 is removed from the glass plate 9 serving as a base, and in a hardened state capable of being cut, Cut to the appropriate size. Then, it is pasted on a cylindrical mold having the same shape as the electric pole 1, and the resin material is completely cured to obtain a glass fiber seat belt 6 as a product shown in FIG. Since the seat belt 6 is cylindrical, it is easy to wind the work around the utility pole 1 on site, and there is no problem such as breakage of the glass fiber when the work is wound around the utility pole 1. It is possible to sufficiently exhibit the reinforcing function.

FIG. 5 shows a second embodiment of the present invention, in which the head of the utility pole 1 is repaired and reinforced. FIG. 1A is a perspective view of a type in which the electric pole 1 itself has no head (a closed portion covering the top surface), and FIG. 1B shows a case where a crack 2 such as a crack occurs in the head 16. (C) is a perspective view when the peeling 17 of the head 16 is damaged. In the case shown in FIG. 7A, the cap 18 made of glass fiber may be stuck and covered via the FR resin as an adhesive, and the one shown in FIGS. After repairing the above-mentioned portion and the portion of the peeling 17, the cap 18 may be stuck and covered with an FR resin as an adhesive. Crack 2 and peel 1
The repair of the portion 7 may be performed in the same manner as in the case of the first embodiment. In the case of repairing and reinforcing the head of the telephone pole 1, it is only necessary to repair the damaged portion and attach the cap 18 via an adhesive, which is safe and quick despite the work in a high place. It is possible to do.

The method for manufacturing the cap 18 is as shown in FIG. First, a molded article of Japanese paper is formed according to a wooden mold having the same shape as the head 16 of the telephone pole 1. Next, vinyl for facilitating the release of the product molded into the wooden mold is covered, and the molded body of the Japanese paper is covered on the vinyl. Then, in the same manner as in the case of the glass fiber seat belt 6, the first layer of FR resin is applied to the Japanese paper, and the glass fiber sheet is attached thereto. Next, air contained between the fibers of the glass fiber sheet is extracted using a defoaming roller. Then, 2
The first layer of FR resin is applied, and a glass fiber sheet is attached thereto in a direction crossing the direction of the first layer of glass fiber sheet, and is contained between the fibers of the glass fiber sheet using a defoaming roller. You only have to extract the air.

Thereafter, after a predetermined reaction time according to the season, the entire cap-shaped molded body including the vinyl sheet is removed from the mold, and a urethane resin paint for improving weather resistance is applied. After drying, the manufacture of the cap 18 is completed.

[0019]

As described above, in the present invention,
Around the damaged part of concrete poles due to aging, etc., the area around the damaged part was cut off and rust was removed and rust prevention was performed.The cut part was filled with filler, and the entire circumference of the pole in the area of the damaged part was removed. A primer is applied, and after drying of the primer, a glass fiber sheet belt formed into a cylindrical shape via a resin paint is wound around a telephone pole and is attached, and a urethane resin paint is overcoated to finish. Therefore, the damaged portion can be repaired by cutting the periphery of the damaged portion, performing rust prevention processing on the reinforcing bar, and filling the filler. Then, after the primer treatment, the strength deterioration of the electric pole can be recovered by winding and attaching a glass fiber seat belt around the electric pole, and excellent reinforcement is provided by the strength-up function of the seat belt itself. can get. In addition, the work can be easily performed without a skilled technician, the work can be performed with a single bamboo ladder without assembling a scaffold, and the work can be performed with a shorter work time and a smaller number of people than in the past. Furthermore, it is also possible to improve the weather resistance by using an overcoated urethane resin paint.

[Brief description of the drawings]

FIG. 1 is a drawing showing work steps according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a glass fiber seat belt according to the first embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a manufacturing procedure of the glass fiber seat belt according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a manufacturing process of the glass fiber seat belt according to the first embodiment of the present invention.

FIG. 5 shows a head of a utility pole according to a second embodiment of the present invention, and FIG.
FIG. (B) is a perspective view in the case of crack damage, and FIG. (C) is a perspective view in the case of peel damage.

FIG. 6 is a flowchart illustrating a manufacturing process of a cap according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Power pole, 2 ... Crack, 3 ... Cut part (recess), 4
... filler, 5 ... primer, 6 ... glass fiber seat belt, 7 ... vinyl tape, 8 ... urethane resin, 9 ...
Glass plate, 11 ... FR resin of first layer, 12 ... Glass fiber sheet of first layer, 13 ... FR resin of second layer, 14 ...
Second-layer glass fiber sheet, 15: glass fiber sheet, 16: head, 17: peeling damaged part, 18: cap

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F205 AA39 AA42 AD16 AD34 AG03 AG08 HA14 HA23 HA33 HA35 HA40 HA47 HB01 HC05 HC16 HG04 HK02 HK05 HK17 HL02 HL14 HT03 HT13 HT22 HT23 HT27 5G367 AA02 AD05 AD13

Claims (4)

[Claims] 1. A method of removing the rust of exposed reinforcing steel by cutting the periphery of a damaged portion of a concrete electric pole due to aged deterioration or the like and performing a rust preventive process, filling the cut portion with a filler, and filling the cut portion with a filler. A primer is applied to the entire circumference of the telephone pole, and after drying the primer, a glass fiber seat belt made into a cylindrical shape via a resin paint is wound around the telephone pole and attached, and the urethane resin paint is overcoated and finished. Repair method of telephone pole. 2. A glass fiber sheet is attached to a first resin layer, a second resin layer is provided thereon, and a second glass fiber sheet is attached thereto. A glass fiber seat belt for repairing utility poles, wherein the eye glass fiber sheets are stuck in directions crossing each other. 3. The glass fiber seat belt for repairing utility poles according to claim 2, which is formed in a cylindrical shape. 4. A glass fiber sheet is attached to a first resin layer, a second resin layer is provided thereon, and a second glass fiber sheet is attached, and the whole is covered on the head of a utility pole. A cap for repairing electric poles, wherein the first and second glass fiber sheets are formed in a cap shape that can be attached to each other in a direction crossing each other.