JP2015232237A - Reinforcement member, reinforcement structure, and electric pole reinforcing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement member capable of more reliably reinforcing an existing electric pole and a reinforcement structure, and provide an electric pole reinforcing method that enables reinforcing work to be easily executed even by a worker except an expert.SOLUTION: Reinforcement pieces 6a and 6b formed of a fiber-reinforced resin are pre-produced in a factory and the like. The reinforcement pieces 6a and 6b are attached to an electric pole 100 to be reinforced and integrated together to form a connected body 2 for covering a circumferential part of the electric pole 100, and the connected body 2 and the electric pole 100 are fixed together with an adhesive 5. Subsequently, a reinforcing sheet 3 orthogonal to an axial direction is wound to prevent an explosive fracture in the electric pole 100.

Description

  The present invention relates to a reinforcing member that reinforces an existing utility pole. The present invention also relates to a utility pole reinforcing structure using the reinforcing member. Furthermore, the present invention relates to a method for reinforcing a utility pole using the reinforcing member.

Railways are provided with electric wires and cables for supplying electric power, signals and the like to the railway vehicles, and electric poles supporting the electric wires and cables are arranged in parallel with the tracks.
Most of the utility poles are exposed to the ground and are placed in an environment that has been exposed to wind and rain for many years. For this reason, for example, in a concrete utility pole, the strength may decrease and damage such as cracks may occur on the surface. Moreover, from the viewpoint of ensuring safety in the event of a disaster such as an earthquake, utility poles are required to have seismic strength that does not collapse.
For this reason, the utility pole is maintained at regular intervals. If the utility pole falls below the prescribed seismic strength due to long-term use, or if a new seismic standard is established, replace it with a new utility pole. Is done.

However, replacing the utility pole takes a lot of time as well as cost. That is, there is a problem that it takes several days to replace an existing utility pole. On the other hand, there is a fact that train operation cannot be stopped for several days due to railway operation. Therefore, it is necessary to provide a separate power transmission line during the replacement work.
Moreover, the replacement of the utility pole is difficult by human power due to its large weight, and it is necessary to use heavy machinery. Therefore, it may be necessary to block off the surrounding transportation network (roads, trains, bridges, etc.) during the construction period. However, in some important traffic networks such as roads with heavy traffic, it may not be possible to block the traffic network.
As described above, from the viewpoint of ensuring safety, it is preferable to replace the existing utility pole with a new utility pole.

  Therefore, conventionally, when it is difficult to replace such a utility pole, efforts have been made to provide sufficient seismic strength by replacing the existing utility pole and reinforcing the strength of the existing utility pole with another member. ing. For example, a method of reinforcing a seismic strength of a utility pole by winding a steel band around an existing utility pole is widely adopted.

However, the reinforcing method of winding the steel band around the existing utility pole is extremely poor in workability because the weight of the steel band to be wound is very large.
In particular, when reinforcing with a steel band over a wide range in the longitudinal direction (axial direction) of the utility pole, the steel band is too heavy, making it difficult to work manually. Further, when the upper part of the utility pole is reinforced with a steel band, the work is performed at a high place, so there is a limit to the work by human power. Therefore, it is necessary to work with heavy machinery or the like, and there are cases where it cannot be realistically reinforced, as with the replacement of the utility pole.
Moreover, when the utility pole is provided in the viaduct, the utility pole may be installed in the overhang | projection part projected in the orthogonal direction with respect to the track direction in order to shift a utility pole from a track.
When a steel band is used to reinforce such a utility pole, the overhang may become insufficient in strength due to an increase in weight associated with the installation of the steel band. For this reason, reinforcement of the overhang portion may be required separately from the reinforcement of the utility pole.

  As a technique for solving such a problem, Patent Document 1 discloses a reinforcement construction in which aromatic polyamide fibers are impregnated with resin on the site to form a reinforcing sheet, and the reinforcing sheet is spirally wound around an existing electric pole. A method is described.

Japanese Patent No. 3488191

However, since the reinforcing construction method described in Patent Document 1 impregnates aromatic polyamide fiber with resin on the site to form a reinforcing sheet, it takes a long time to impregnate. Further, when the reinforcing sheet is wound in a spiral shape, if any looseness or sagging occurs, the portion becomes a defect and becomes a starting point of destruction.
Therefore, the reinforcement construction method described in Patent Document 1 requires a skillful technique, and there is a problem that it can be performed only by a skilled person.
In addition, when the number of laminated sheets is small as few as 2 to 3 layers, there is little looseness and deflection, but when the number of laminations is large, even if it is a skilled person, not only the looseness and deflection become significant, but also the site The construction time will also increase.
And, when the fibers forming the reinforcing sheet are continuous in the axial direction of the utility pole, since the reinforcing effect to the utility pole is exhibited, even if a reinforcing sheet made of fibers oriented in the axial direction is used, it is wrapped The reinforcing sheet is discontinuous in the axial direction. Therefore, the reinforcing effect by the reinforcing sheet is small. That is, in order to obtain a reinforcing effect of a certain level or more, it is necessary to bond the reinforcing sheet continuously extending in the axial direction in the field. However, when the reinforcing range of the reinforcing sheet is long in the axial direction, it is extremely difficult to suppress the occurrence of fiber loosening and deflection.

  Then, this invention makes it a subject to provide the reinforcement member and reinforcement structure which can reinforce the existing utility pole more reliably. It is another object of the present invention to provide a method for reinforcing a power pole that can easily reinforce a power pole even if it is not an expert.

  According to a first aspect of the present invention for solving the above-described problem, a reinforcing member for reinforcing an existing power pole has a plurality of reinforcing pieces, and the plurality of reinforcing pieces are integrated to form a periphery of the power pole. A connecting body that covers the electric pole in the direction is formed, the connecting body is formed of a fiber reinforced resin, and the orientation of the fiber has an axial component of the electric pole. It is the reinforcement member to do.

  The term “electric pole” as used herein includes a power pole installed for the purpose of power transmission / distribution and a telegraph pole installed for the purpose of communication, and also includes an electric wire for supplying power, signals, etc. to ordinary households and companies. This includes not only the power pole that supports the cable, but also the power pole that supports the electric wires and cables for supplying power, signals, etc. to the railway vehicles.

According to the structure of this invention, it has a some reinforcement piece and integrates the said some reinforcement piece, and forms the connection body which covers the circumferential direction of the said utility pole. That is, since the reinforcing piece in a disassembled state can be carried to the work site for each reinforcing piece, it can be transported manually without using heavy equipment. Therefore, reinforcement work is possible even in a narrow place where heavy machinery cannot enter. In addition, construction at the work site can be performed manually.
In particular, when reinforcing a utility pole installed on a railway track, the conventional reinforcement method requires a sufficient work space, and has to be performed at night when the railway does not pass.
However, according to the configuration of the present invention, as described above, a heavy machine or the like is not used, and a space for construction can be reduced. Therefore, the construction can proceed even while the train is passing. That is, it can work even in the daytime.
Furthermore, according to the structure of this invention, the connection body is formed with resin reinforced with fiber, and the orientation of the said fiber has the axial direction component of a utility pole. In other words, because the electric pole is reinforced in the axial direction by the fiber, even when it is hit by natural disasters such as typhoons and earthquakes, it can compensate for the load in the tensile direction, which is a weak point of concrete, Sufficient strength can be secured. Therefore, the existing utility pole can be reinforced more reliably.

  The invention according to claim 2 is the reinforcing member according to claim 1, wherein the reinforcing piece is long and extends in the axial direction.

  According to the configuration of the present invention, since the reinforcing piece is long and extends in the axial direction, no looseness or sagging occurs, and no locally weak portion occurs in the axial direction.

  The invention according to claim 3 is the reinforcing member according to claim 1 or 2, characterized in that the fibers are continuous over the entire length of the connector.

  According to the structure of this invention, since the fiber of a reinforcement piece is continuous over the full length without a cutting | disconnection, a cut | interruption, etc., it is hard to produce a site | part with a weak local intensity | strength in an axial direction.

  In the above-described invention, the reinforcing piece is reinforced by a plurality of types of fibers, and at least one of the orientations of the fibers may have a component orthogonal to the axial direction of the utility pole.

  According to this configuration, the reinforcing piece is reinforced by a plurality of types of fibers, and at least one type of orientation of the fibers has a component orthogonal to the axial direction of the utility pole. That is, in the reinforcing piece, the fibers are arranged in both the axial component of the utility pole and the component orthogonal to the axial direction of the utility pole. Therefore, it is possible to withstand unexpected vibrations and external forces. Also, there is no loss of shape such as displacement of internal fibers when carrying or attaching.

  According to a fourth aspect of the present invention, the reinforcing body covers the outer periphery of the coupling body, and the reinforcing body has fibers oriented with a component orthogonal to the axial direction of the utility pole. It is a reinforcement member in any one of Claims 1-3 characterized by the above-mentioned.

According to the configuration of the present invention, the direction orthogonal to the axial direction is reinforced with fibers, so when the internal concrete is destroyed due to shaking such as an earthquake, the connection between the reinforcing pieces is peeled off, and the concrete Can be prevented from exploding.
In addition, according to the configuration of the present invention, it is possible to prevent the electric pole from collapsing due to deterioration or the like as long as the connected body is not broken.

  Invention of Claim 5 is a reinforcement structure which reinforces a utility pole using the reinforcement member in any one of Claims 1-4, Comprising: Each one part of the said utility pole and a connection body is in a foundation structure. It is the reinforcement structure characterized by being embedded in.

  The “basic structure” as used herein refers to the underground structure of the underground or viaduct.

  According to the structure of this invention, a part of connection body is embedded in foundation structures, such as the underground and a viaduct foundation structure, with a utility pole. In other words, when an external factor such as wind blows occurs, the base of the electric pole that generates the maximum bending moment is reinforced, so that it is possible to prevent the electric pole from being destroyed by the bending moment.

  The invention according to claim 6 is the reinforcing structure according to claim 5, wherein a part of the reinforcing body is embedded in the foundation structure.

  According to the structure of this invention, a part of fiber orthogonal to an axial direction is embedded in foundation structures, such as underground and a viaduct foundation structure. That is, when an external factor such as wind blows occurs, the base of the electric pole that generates the maximum bending moment is reinforced, and it is possible to prevent the electric pole from being destroyed by the bending moment.

  The invention according to claim 7 is an electric pole reinforcing method for reinforcing an existing electric pole using the reinforcing member according to any one of claims 1 to 4, wherein an adhesive is provided between the reinforcing piece and the electric pole. The reinforcing member and the electric pole are integrated by solidifying with the interposition of the electric pole.

  According to the method of the present invention, since the reinforcing piece and the utility pole are mechanically or chemically joined by an adhesive, the reinforcing piece and the utility pole even when subjected to a natural disaster such as a typhoon or an earthquake. There is no friction between them, and the utility pole is not destroyed by the friction.

  The invention according to claim 8 is the method for reinforcing a utility pole according to claim 7, wherein a putty-like or paste-like underwater curing adhesive is used as the adhesive.

According to the method of the present invention, a putty-like or paste-like adhesive is interposed between the reinforcing piece and the utility pole. That is, the gap between the electric pole and the reinforcing piece is filled by applying an adhesive to the inner surface of the reinforcing piece and / or the outer surface of the electric pole.
Since a putty-like or paste-like adhesive is used, the adhesive does not sag even after being applied to the inner surface of the reinforcing piece and / or the outer surface of the utility pole, and is applied to the inner surface of the reinforcing piece and / or the outer surface of the utility pole. Can keep. That is, it is possible to easily apply the adhesive without requiring a skilled skill.
By the way, a normal adhesive cannot be bonded when the surface of the bonding target is wet. On the other hand, according to the structure of this invention, since the underwater hardening adhesive agent is used as an adhesive agent, construction can be performed even in the case of rainy weather, high humidity, or when the surface of a utility pole has condensed.

  The invention according to claim 9 is characterized in that a gap of 1 mm or more and 4 mm or less is formed between the reinforcing member and the utility pole, and the gap is filled with a fluid adhesive. 7. The method for reinforcing a utility pole according to 7.

According to the method of the present invention, an adhesive which is a fluid is used and introduced into the gap between the reinforcing member and the utility pole. For example, by filling the gap with a low-viscosity adhesive, uneven coating of the adhesive can be made difficult to occur.
Further, according to the method of the present invention, since the adhesive is filled after the reinforcing member is assembled, the reinforcing member can be integrated with the electric pole without being limited by the time for the adhesive to cure. Therefore, there are few restrictions and workability is good.
According to the method of the present invention, the gap is not less than 1 mm and not more than 4 mm.
When the gap is smaller than 1 mm, it becomes difficult to fill the adhesive, and workability may be reduced.
When the gap is larger than 4 mm, rattling is likely to occur between the utility pole and the connecting body, and the connecting body may be inclined and fixed with respect to the utility pole.

  The above-described invention is a method of reinforcing a power pole that reinforces an existing power pole using the above-described reinforcing member, a connected body forming step of connecting the formed reinforcing pieces to form a connected body, and a reinforcing piece and a power pole. And an adhesive solidifying step for solidifying the adhesive.

According to the structure of this invention, it has the connection body formation process which connects the shape | molded reinforcement piece and forms a connection body. That is, a reinforcing piece molded in advance in a factory or the like is carried into a work site to form a connecting body that covers the circumferential direction of the utility pole at the work site. Therefore, the physical properties of the reinforcing piece are stable (no partial strength reduction), and no special technique is required when integrating the plurality of reinforcing pieces. Therefore, even if it is not an expert, a connection body can be wound around the existing utility pole. Moreover, the attachment efficiency (the number of attachments of the reinforcement member to the existing utility pole per unit time) improves.
Moreover, according to the structure of this invention, it has the adhesive agent solidification process of solidifying an adhesive agent between a reinforcement piece and a utility pole. That is, the reinforcing piece and the utility pole are mechanically or chemically joined, and even if the struck by a natural disaster such as a typhoon or an earthquake, there is no friction between the reinforcing piece and the utility pole. The utility pole is not destroyed.

According to the reinforcing member and the reinforcing structure of the present invention, it is possible to reinforce an existing utility pole more reliably than a conventional reinforcing member.
According to the method for reinforcing an electric pole of the present invention, it is possible to perform construction more easily than the conventional reinforcing method.

It is the perspective view which showed notionally the state which reinforced the electric pole with the reinforcement member of 1st Embodiment of this invention. It is the disassembled perspective view which decomposed | disassembled the reinforcement member of FIG. 1, and has abbreviate | omitted and shown the reinforcement body. It is a schematic diagram showing the internal structure of the reinforcement piece of FIG. It is a longitudinal cross-sectional view of the principal part of FIG. It is explanatory drawing of the reinforcing method of the utility pole concerning 1st Embodiment, and is a perspective view which represents typically the state which formed the penetration part in the root of the existing utility pole. It is explanatory drawing of the reinforcing method of the utility pole concerning 1st Embodiment, and is a perspective view which represents typically the state at the time of attaching a reinforcement piece to the existing utility pole. It is explanatory drawing of the reinforcing method of the utility pole concerning 1st Embodiment, and is a perspective view which represents typically the state at the time of fixing a reinforcement piece to the existing utility pole with a fixing member. It is explanatory drawing of the reinforcing method of the utility pole concerning 1st Embodiment, and is a perspective view which represents typically the state at the time of winding a reinforcement sheet around the outer periphery of a coupling body. It is explanatory drawing of the reinforcing method of the utility pole concerning 1st Embodiment, and is a perspective view which represents typically the state at the time of filling a rooting part with the filler. It is explanatory drawing of the reinforcing method of the utility pole concerning 2nd Embodiment, and is a perspective view which represents typically the state at the time of winding a reinforcement sheet around the outer periphery of a coupling body. It is explanatory drawing of the reinforcing method of the utility pole concerning 3rd Embodiment, and is sectional drawing which represents typically the state at the time of inject | pouring an adhesive agent into a clearance gap. It is explanatory drawing of the test outline | summary used for the Example of this invention, and is a top view of a measurement sample and a measuring apparatus.

Hereinafter, embodiments of the present invention will be described in detail.
In the following description, unless otherwise specified, the vertical positional relationship will be described based on the normal installation position (FIG. 1).

The reinforcing structure 4 according to the first embodiment of the present invention reinforces an existing utility pole 100 using a reinforcing member 1 as shown in FIG.
The reinforcing member 1 includes a connecting body 2, a reinforcing sheet 3 (reinforcing body), and an adhesive 5 in a state where the electric pole 100 is reinforced as shown in FIG. 4.

The utility pole 100 is a publicly known utility pole and is not limited to a concrete one but can be applied to any metal or wooden utility pole. The utility pole 100 of this embodiment is a concrete utility pole.
In addition, the utility pole 100 is a part of a foundation structure 101 such as the underground or a viaduct foundation.
The utility pole 100 of this embodiment is a utility pole arranged on the railway track, and has a cylindrical shape with a diameter of 400 mm and a height of about 10 m from the ground.

As shown in FIG. 1, the connecting body 2 is formed by integrating a plurality of reinforcing pieces 6.
As shown in FIG. 2, each reinforcing piece 6 is formed of a main body portion 7 and a connection portion 8.
The main body 7 is a part having a circular arc cross-sectional shape, and is a part that covers a part of the utility pole 100 on the inner surface. The inner peripheral surface (inner side surface) of the main body 7 is curved and has a shape along the outer peripheral surface (outer side surface) of the utility pole 100.
The connection part 8 is a part connected to the main body part 7 of the other reinforcing piece 6. The connection portion 8 is a portion that covers a part of the main body portion 7 of the other reinforcing piece 6 in a state of being attached to the utility pole 100, and can be engaged with the main body portion 7 of the other reinforcing piece 6.

When attention is paid to the internal structure of the reinforcing piece 6, the reinforcing piece 6 is integrated by impregnating the reinforcing fibers with resin. That is, the reinforcing piece 6 is formed of fiber reinforced resin (FRP).
Specifically, as shown in FIG. 3, the reinforcing piece 6 forms a skeleton by laminating the first fiber 10, the second fiber 11, and the third fiber 12 in order from the utility pole 100 side (lower side in FIG. 3). It is bound by the resin 15.
In this embodiment, the reinforcing piece 6 is formed by hand lay-up molding.

Although the 1st fiber 10 is not specifically limited, From a viewpoint of preventing the axial crack of the utility pole 100 at the time of conveyance of a reinforcement piece or construction, it is preferable that it is formed with the cloth fiber or the mat | matte.
In this embodiment, a carbon cloth is employed to prevent damage from the outside described above. That is, the first fiber 10 of the present embodiment is formed by a plurality of vertical and horizontal fibers intersecting in a mesh shape.
The first fibers 10 are formed from axial fibers 16 extending in the axial direction of the utility pole 100 and circumferential fibers 17 extending in the circumferential direction when the utility pole 100 is reinforced by the reinforcing member 1.
That is, the first fiber 10 has a resistance against each of the axial component and the circumferential component of the utility pole 100 when the utility pole 100 is reinforced by the reinforcing member 1.
Further, the axial fibers 16 and the circumferential fibers 17 are orthogonal to each other when the reinforcing piece 6 is extended as shown in FIG.
The first fibers 10 preferably have a tensile strength of 200 N / mm width or more for both the axial fibers 16 and the circumferential fibers 17 from the viewpoint of dealing with unexpected vibrations and the like.

The second fiber 11 is a fiber that forms the main skeleton of the reinforcing piece 6 among the fibers 10, 11, and 12.
Although the material of the 2nd fiber 11 is not specifically limited, It is preferable to employ | adopt a carbon fiber from a viewpoint of raising reinforcement strength. The second fiber 11 of the present embodiment uses a unidirectional carbon cloth from the viewpoint of intensively increasing the axial strength of the utility pole 100.
That is, the second fibers 11 are formed by the axial fibers 20 extending in the axial direction of the utility pole 100 when the utility pole 100 is reinforced by the reinforcing member 1. That is, the second fiber 11 has a resistance against the axial component of the utility pole 100.
The second fiber 11 has sufficient bending strength to supplement the seismic strength of the existing utility pole 100. Specifically, the tensile strength in the axial direction of the second fiber 11 is preferably 2000 N / mm width or more, and more preferably 3000 N / mm width or more.

The third fibers 12 are not particularly limited, but are preferably formed of cloth fibers or mats from the viewpoint of preventing the electric pole 100 from cracking in the axial direction during transportation or construction of the reinforcing pieces. In the present embodiment, a glass cloth is employed in order to prevent damage from the outside described above. That is, the third fiber 12 of the present embodiment is formed by crossing a plurality of fibers in a mesh shape as shown in FIG.
When the electric pole 100 is reinforced as shown in FIG. 1, the third fiber 12 is formed of an axial fiber 25 extending in the axial direction of the electric pole 100 and a circumferential fiber 26 extending in the circumferential direction. That is, the third fiber 12 has a resistance against each of the axial component and the circumferential component of the utility pole 100.
Further, the axial fibers 25 and the circumferential fibers 26 are orthogonal to each other when the reinforcing piece 6 is extended as shown in FIG.

The resin 15 is an adhesive resin that bonds the fibers 10, 11, and 12, and bonds the fibers 10, 11, and 12 inseparably and integrally.
The material of the resin 15 is not particularly limited as long as it is a thermosetting resin, but in this embodiment, a vinyl ester resin is employed.

As described above, the reinforcing piece 6 forms a three-layer structure having the fibers 10, 11, and 12 as a skeleton. In a pseudo manner, a portion having the first fiber 10 as a skeleton is a carbon fiber reinforced resin ( The portion having the second fiber 11 as a skeleton is formed of carbon fiber reinforced resin (CFRP), and the portion having the third fiber 12 as a skeleton is formed of glass fiber reinforced resin (GFRP). Will be.
The fibers 10, 11, and 12 are continuous over the entire length of the reinforcing piece 6.

As can be seen from FIG. 8, the reinforcing sheet 3 is a long sheet extending in a long band shape, and is a member that covers the outer peripheral surface of the connector 2 when the utility pole 100 is reinforced.
As shown in the enlarged view of FIG. 8, the reinforcing sheet 3 is formed from the fourth fibers 30 and the resin 31, and is formed by solidifying the fourth fibers 30 while impregnating the resin 31.
The fourth fibers 30 are formed by longitudinal fibers 32 extending in the longitudinal direction.
Although the 4th fiber 30 is not specifically limited, A carbon fiber etc. are employable from a viewpoint of raising reinforcement strength. In the present embodiment, the fourth fiber 30 uses a carbon cloth.
The material of the resin 31 is not particularly limited as long as it has good fiber impregnation properties and can be cured at room temperature. For example, an epoxy resin can be used.
That is, the reinforcing sheet 3 of the present embodiment is formed of carbon fiber reinforced resin (CFRP) impregnated with the resin 31 with the fourth fiber 30 as a skeleton in a pseudo manner.

As shown in FIG. 4, the adhesive 5 is an adhesive that bonds the utility pole 100 and the reinforcing piece 6. The adhesive 5 of the present embodiment is a putty-like or paste-like adhesive having a high viscosity.
The material of the adhesive 5 is not particularly limited as long as it has an adhesive function, but an underwater curing adhesive is adopted from the viewpoint of enabling work even in rainy weather.
In the present specification, not only the adhesive 5 before being cured but also the one in which the adhesive 5 is cured is called an adhesive.

Then, the positional relationship of each site | part at the time of reinforcing the existing utility pole 100 with the reinforcement member 1 and forming the reinforcement structure 4 is demonstrated.
In addition, the coupling body 2 is formed of two reinforcing pieces 6 (6a, 6b) as shown in FIG. Therefore, in the following description, in order to distinguish each reinforcing piece 6, a is added to the reference numeral of the part related to one reinforcing piece 6a, and b is added to the reference numeral of the part related to the other reinforcing piece 6b.

As shown in FIG. 4, a part of the reinforcing member 1 is embedded in the foundation structure 101. Specifically, the lower end portions of the connecting body 2, the reinforcing sheet 3, and the adhesive 5 are embedded in the filler 36 that constitutes a part of the foundation structure 101.
As shown in FIG. 1, the connecting body 8 has a connecting portion 8 of one reinforcing piece 6 a and a main body portion 7 of the other reinforcing piece 6 b engaged, and the connecting portion 8 of one reinforcing piece 6 b and the other reinforcing piece 6 b. The main body 7 of the piece 6a is engaged. As shown in FIG. 4, an adhesive 5 is interposed between the outer peripheral surface of the utility pole 100 and the inner peripheral surfaces of the reinforcing pieces 6 a and 6 b constituting the coupling body 2.
As shown in FIG. 1, the reinforcing sheet 3 is wound around the utility pole 100 in a spiral manner with the axial direction of the utility pole 100 as the center. That is, the reinforcing sheet 3 is disposed along the outer peripheral surface of the connector 2.
In addition, since the reinforcing sheet 3 is spirally wound, the longitudinal fibers 32 of the fourth fibers 30 inside the reinforcing sheet 3 are inclined with respect to the axial direction and the circumferential direction.
That is, the longitudinal fiber 32 has a resistance against each of the axial component and the circumferential component.
As shown in FIG. 4, the reinforcing sheet 3 has an end portion in the width direction (an end portion in the vertical direction) of the reinforcing sheet 3 overlapping in the axial direction. That is, the lower part of the reinforcing sheet 3 positioned on the upper side in the axial direction covers the upper part of the reinforcing sheet 3 positioned on the lower side in the axial direction.

  Then, the reinforcement method of the utility pole which reinforces the utility pole 100 using the reinforcement member 1 of 1st Embodiment is demonstrated.

First, as shown in FIG. 5, the base structure 101 that supports the base of the utility pole 100 is dug up to the extent that the utility pole 100 does not collapse to form the root insertion portion 102. Specifically, the base of the utility pole 100 is dug up 20 to 100 cm.
At this time, the end portion of the existing utility pole 100 is buried further below the bottom portion of the root insertion portion 102 as can be seen from FIG.

Further, the reinforcing pieces 6a and 6b molded in a separate process at a factory or the like are carried to the root insertion portion 102, and the reinforcing piece fixing process is performed.
In the reinforcing piece fixing step, first, the putty-like or paste-like adhesive 5 is applied to the inner surface of the main body portion 7 of the reinforcing piece 6.
Then, as shown in FIG. 6, the reinforcing piece 6 coated with the adhesive 5 is attached to the electric pole 100, and the electric pole 100 is covered in the circumferential direction by the reinforcing pieces 6a and 6b.
At this time, the connecting part 8 of the reinforcing piece 6a and the main body part 7 of the other reinforcing piece 6b are engaged and integrated to form the connector 2 that covers the utility pole 100 in the circumferential direction. That is, the reinforcing pieces 6a and 6b are engaged with each other to form one cylindrical connecting body 2.
Reinforcing pieces 6 a and 6 b constituting the connection body 2 cover an intermediate portion of the utility pole 100 and extend in the axial direction of the utility pole 100.
It is preferable that the reinforcing pieces 6 a and 6 b extend from the bottom of the rooting portion 102 to 1/5 to 1/2 in the longitudinal direction of the utility pole 100. Moreover, it is preferable that the lower end part of the reinforcement pieces 6a and 6b is located in the root insertion part 102. FIG.
Moreover, the connection body 2 of this embodiment is attached to the electric pole 100 so that the upper end part may surround the range from the foundation structure 101 to 2-5 m around the electric pole 100 after completion of construction.

Then, as shown in FIG. 7, the reinforcing members 6 a and 6 b are tightened by the band member 35 so as not to separate from the utility pole 100, and the adhesive 5 is solidified.
The band member 35 used at this time is not particularly limited as long as the reinforcing pieces 6a and 6b can be prevented from being separated from the utility pole 100. As the band member 35, for example, a steel band can be employed.
Further, at this time, the reinforcing pieces 6a and 6b are fixed to each other by the band member 35, as shown in FIG.

  Here, the band member 35 will be described. The band member 35 is a member that performs relative positioning between the reinforcing pieces 6 as shown in FIG. 7, and is a member that prevents separation between the reinforcing pieces 6a and 6b adjacent in the circumferential direction. The band member 35 is a linear member, and is a member that is bundled in an annular shape when used. Specifically, it is an iron binding band.

  And if the adhesive agent 5 interposed between the reinforcing piece 6 and the utility pole 100 dries and solidifies, the band member 35 will be removed as needed and a reinforcing piece fixing process will be complete | finished.

Subsequently, a reinforcing sheet forming step is performed. That is, the reinforcing sheet 3 is formed by spirally winding in the circumferential direction of the utility pole 100 while impregnating the fourth fiber 30 with the resin 31 on the outer peripheral surface of the reinforcing piece 6.
At this time, the reinforcing sheet 3 is in close contact with the outer side surface of the connector 2.

When the reinforcing sheet 3 is formed, the reinforcing sheet forming step is finished, and the filler 36 is filled into the root portion 102 as shown in FIG.
Examples of the filler 36 that can be used at this time include sand and mortar.
At this time, a part of the connecting body 2 and the reinforcing sheet 3 is buried in the foundation structure 101 via the filler 36.

  Since the reinforcing member 1 of the present embodiment is lightweight, it can be manually operated by a minimum number of people, and the burden on the operator is small. In addition, personnel costs can be reduced.

  In the reinforcing member 1 according to the present embodiment, since the reinforcing piece 6 that has been molded in advance is used, it is not necessary to mold it at the work site, and it is sufficient if there is a space for insertion into the root insertion portion 102. Therefore, it is not necessary to form a large work space as compared with the case where the reinforcing piece 6 is molded at the work site, and there is no need to perform extra digging.

  If it is the reinforcing member 1 of this embodiment, since the several reinforcement piece 6 is integrated and formed in the circumferential direction of the utility pole, it is possible to carry in the reinforcement piece 6 to the field separately, and a reinforcement piece 6 is not too heavy, safe and workable.

  If it is the reinforcing method of the electric pole of this embodiment, it is possible to use the reinforcing piece 6 of good quality with uniform resin impregnation and fiber orientation, etc., because the reinforcing piece 6 previously formed is used. It is not necessary to manage the reinforcing piece 6 itself at the work site.

In the first embodiment described above, the reinforcing sheet 3 is spirally wound around the outer peripheral surface of the coupling body 2 to reinforce the electric pole 100. However, the present invention is not limited to this, and the shape of the reinforcing sheet and The attachment method is not limited.
For example, as shown in FIG. 10, a reinforcing sheet 53 that is shorter than the reinforcing sheet 3 of the first embodiment may be used.
A reinforcing method in this case will be described as a second embodiment.

In the reinforcing method of the second embodiment, in the reinforcing sheet forming step, instead of the reinforcing sheet 3, the reinforcing sheet 53 has a length in the longitudinal direction that is equal to or longer than the outer circumference of the connector 2. It is preferable to use a reinforcing sheet 53 having a length in the longitudinal direction of 1.5 or more.
The reinforcing sheet 53 is the same as the reinforcing sheet 3 of the first embodiment except for the dimensions.
Then, in the reinforcing sheet forming step, as shown in FIG. 10, a plurality of reinforcing sheets 53 are annularly wound around the outer periphery of the connection body 2 that covers the periphery of the utility pole 100 until reaching a predetermined height.
At this time, in the axial direction, adjacent reinforcing sheets 53 and 53 partially overlap each other.
Each reinforcing sheet 53 is parallel to the axial direction. That is, in the fourth fiber 30 of the reinforcing sheet 53, the longitudinal fiber 32 has a resistance against the circumferential direction.

  According to the reinforcing method of the second embodiment, since the reinforcing sheet 53 can be formed in small portions, it is easy to perform the reinforcing work in the workplace.

In the above-described embodiment, the adhesive 5 is applied in advance to the inner peripheral surface of the reinforcing piece 6 and attached to the utility pole 100, but the present invention is not limited to this. For example, the adhesive may be introduced after assembling the connector 2.
A reinforcing method in this case will be described as a third embodiment.

In the reinforcing method of the utility pole of the third embodiment, in the reinforcing piece fixing step, the connecting body 2 is assembled and fixed by the band member 35 without applying the adhesive 5 to the reinforcing piece 6 (connecting body forming step).
At this time, a gap 66 is formed between the inner peripheral surface of the connector 2 and the outer peripheral surface of the utility pole 100 as shown in FIG.
The gap 66 is preferably 1 mm or more and 4 mm or less. If the gap 66 is smaller than 1 mm, the adhesive 65 is difficult to be filled, and workability may be reduced. When the gap 66 is larger than 4 mm, rattling is likely to occur between the utility pole 100 and the connection body 2, and the connection body 2 may be inclined and fixed with respect to the utility pole 100.

Then, the tube 67 connected to the adhesive supply means 68 is inserted into the gap 66, and the tube 67 is lowered to the vicinity of the lower end portion of the connector 2.
At this time, the tube 67 reaches the inside of the gap 66 and near the bottom of the root insertion portion 102.

Thereafter, the adhesive 65 is injected from the tube 67 by the adhesive supply means 68. When the adhesive 65 reaches a predetermined height, the supply of the adhesive 65 is stopped, the tube 67 is pulled out, and the adhesive 65 is removed. Solidify (adhesive solidification step).
In this embodiment, when it is confirmed that the adhesive 65 overflows from the top of the connection body 2 and is filled to the top of the connection body 2, the supply of the adhesive 65 is stopped and the tube 67 is pulled out.
Note that the adhesive 65 used at this time is a liquid adhesive having fluidity.

  In the method for reinforcing a utility pole according to the third embodiment, since the liquid adhesive 65 is injected between the reinforcement piece 6 and the utility pole 100, uneven coating or the like can be prevented.

  In the above-described embodiment, the skeleton of the reinforcing piece 6 is formed by the three layers of the first fiber 10, the second fiber 11, and the third fiber 12, but the present invention is not limited to this, and the first The fiber 10 and the third fiber 12 may be omitted if the second fiber 11 has sufficient lateral strength (strength in the circumferential direction of the utility pole 100) when the utility pole 100 is reinforced.

  In the above-described embodiment, the electric pole arranged on the railroad track is reinforced. However, the present invention is not limited to this, and the electric pole arranged on the road or the like may be reinforced. In this case, unlike the utility poles arranged on the railroad track, the utility poles arranged on the road or the like have an isosceles trapezoidal cross section, so that the inner side surface of the reinforcing member 1 can be formed along the outer side surface of the utility pole. preferable.

  In the above-described embodiment, a part of the main body is covered with the connecting portion. However, the present invention is not limited to this, and it is only necessary to connect the reinforcing pieces. That is, it is not necessary to provide a circumferential connecting portion.

  In the above-described embodiment, the reinforcing piece that is divided into two in the circumferential direction of the utility pole is used. However, the present invention is not limited to this, and may be any reinforcing piece that can be divided into a plurality of parts in the circumferential direction of the utility pole. . For example, the reinforcing piece may be divided into three parts. In addition, it is preferable that it is a reinforcement piece which becomes 2 division or 3 division from a viewpoint that the number of parts does not increase too much.

  In the above embodiment, the reinforcing sheet is formed at the work site where the reinforcing work is performed. However, the present invention is not limited to this, and the reinforcing sheet may be formed in advance by a factory or the like. In this case, it is preferable to apply an adhesive to the reinforcing sheet and adhere to the outer peripheral surface of the connector.

  In the above-described embodiment, the reinforcing piece 6 is formed by hand lay-up molding, but the present invention is not limited to this, and may be formed by a method other than hand lay-up molding. For example, the reinforcing piece 6 may be formed by pultrusion.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

  Next, a test for examining the effect of utility pole repair by the method of the present invention will be described.

An outline of the test is shown in FIG.
The following were used as test bodies for measuring the performance of the reinforcing member 1 of the present invention.
As the utility pole 100, a train line pole 12-40-N200B (length: 12 m, end / former diameter: 40 cm, bending moment: 200 kN · m) was used.
The reinforcing piece 6 is a Toray cross UT70-30G11 laminated as the second fiber 11 so that the fibers are aligned in the axial direction, the inner layer surface is a glass mat as the third fiber 12, and the second fiber 11 is the second layer 11 on the outer layer surface. A carbon cloth material was provided as one fiber 10. And these were integrated using vinyl ester resin.
The reinforcing sheet 3 used Toray Cross UT70-30G as the fourth fiber 30 was wound around the connection body 2 in which the reinforcing pieces 6 were integrated in the circumferential direction twice.

Next, the assembly of the test body will be described.
First, the reinforcing piece 6 coated with an adhesive made of epoxy resin was attached and cured from a position 1.6 m away from the end of the utility pole 100 to a position 6.6 m away. That is, the range extending over 5 m in the longitudinal direction in the middle part of the utility pole 100 was reinforced with the connector 2. In addition, the reinforcing member 1 was formed by winding the reinforcing sheet 3 from the outside of the connector 2.
And the electric pole 100 was fixed to the fixture which united with the wall upright with respect to the ground. Specifically, a range of 2 m from the end of the utility pole 100 reinforced with the reinforcing member 1 was inserted into the fixing hole of the fixing bracket. Furthermore, the gap between the electric pole 100 and the inner wall of the fixing hole was filled with mortar which is a filler, and the electric pole 100 was fixed to the fixture. At this time, a part of the reinforcing member 1 (a range from the end of the reinforcing member 1 to a position 0.4 m away) was positioned inside the fixing hole of the fixing bracket and embedded with mortar. The test body was assembled in this way.

The test method applied a horizontal load at a position 9 m from the end of the utility pole 100.
Specifically, alternating loading is performed three times on the left and right sides with a constant load at a position 5 m from the other end of the utility pole 100. If no breakage is confirmed, the amount of amplitude is increased and the same alternating loading is performed. It was.
The alternating loading was repeated by increasing the amplitude until the specimen was broken or no increase in load was observed.

As a result of the test, the unreinforced utility pole was broken at a load of 69.1 kN (bending moment of 484 kN · m).
The specimen reinforced with the reinforcing member of the present invention was able to apply a load up to a maximum load of 113.1 kN (bending moment of 792 kN · m). Even if the amplitude was increased further, the load did not increase.

  As is apparent from the results, the strength of the utility pole reinforced with the reinforcing member 1 is clearly improved as compared with the unreinforced utility pole.

DESCRIPTION OF SYMBOLS 1 Reinforcement member 2 Connection body 3,53 Reinforcement sheet (reinforcement body)
DESCRIPTION OF SYMBOLS 4 Reinforcement structure 5,65 Adhesive 6,6a, 6b Reinforcement piece 11 2nd fiber 15 Resin 30 4th fiber 66 Crevice 100 Electric pole 101 Foundation structure

Claims (9)

In a reinforcing member that reinforces an existing utility pole,
Having a plurality of reinforcing pieces,
The plurality of reinforcing pieces are integrated to form a connecting body that covers the power pole in the circumferential direction of the power pole,
The connecting member is formed of a resin reinforced with fibers, and the orientation of the fibers includes an axial component of a utility pole.   The reinforcing member according to claim 1, wherein the reinforcing piece is elongated and extends in the axial direction.   The reinforcing member according to claim 1, wherein the fibers are continuous over the entire length of the coupling body. A reinforcing body covers the outer periphery of the connecting body,
The reinforcing member according to any one of claims 1 to 3, wherein the reinforcing body has fibers oriented with a component orthogonal to the axial direction of the utility pole. A reinforcing structure for reinforcing a power pole using the reinforcing member according to claim 1,
A part of each of the said utility pole and a connection body is embedded in the foundation structure, The reinforcement structure characterized by the above-mentioned.   The reinforcing structure according to claim 5, wherein a part of the reinforcing body is embedded in the foundation structure. In the reinforcement method of the utility pole which reinforces the existing utility pole using the reinforcement member in any one of Claims 1-4,
A method for reinforcing an electric pole, comprising: integrating the reinforcing member and the electric pole by solidifying with an adhesive interposed between the reinforcing piece and the electric pole.   The method for reinforcing a utility pole according to claim 7, wherein a putty-like or paste-like underwater curing adhesive is used as the adhesive. A gap of 1 mm or more and 4 mm or less is formed between the reinforcing member and the utility pole,
The method for reinforcing a utility pole according to claim 7, wherein the gap is filled with a fluid adhesive.

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