JP2016037764A - Aseismic reinforcing method and structure for electric pole, and reinforcing member used therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseismic reinforcing method and others for an electric pole that realize an aseismic reinforcing structure of a high flexural reinforcement effect.SOLUTION: An aseismic reinforcement method for an electric pole A having a lower edge part A1 fixed on a fixing part 1 (electric pole footing 10) uses a plurality of curved plates 50 that extends along a direction of a central axis of the electric pole A and has a curved surface fit for an outer peripheral surface of the electric pole A. The aseismic reinforcement method comprises the following steps for: forming a groove 13 on the fixing part 1 around the electric pole A, the groove being used for fixing a lower edge part (installation part 56) of the curved plate 50; fixing the lower edge part of the curved plate 50 in the groove 13 and installing a plurality of the curved plates 50, 50... for surrounding the outer peripheral surface of the lower edge part A1 of the electric column A in the fixing part 1 and the outer peripheral surface of a part of the electric pole A protruding above the fixing part 1; and mutually connecting the plurality of curved plates 50, 50....SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for seismic reinforcement of a power pole capable of realizing a seismic reinforcement structure for a power pole having a high bending reinforcement effect.

  A seismic reinforcement structure for a power pole is known in which the periphery of the power pole is surrounded by a cylindrical body as a reinforcing member (see, for example, Patent Document 1).

JP 2005-336746 A

In the seismic reinforcement structure for utility poles disclosed in Patent Document 1, there is a shear reinforcement effect during an earthquake, but a bending reinforcement effect cannot be expected. In other words, since the cylindrical body as a reinforcing member is located on the ground, the electric pole is shaken during the earthquake and a bending moment acts on the electric pole, and bending stress is applied to the end of the electric pole that is the boundary between the electric pole and the ground. Since the reinforcing member is not a member that resists the bending stress, the end of the utility pole may cause bending failure.
The present invention provides a seismic reinforcement method for a utility pole capable of realizing a seismic reinforcement structure for a utility pole having a high bending reinforcement effect.

The seismic reinforcement method for a utility pole according to the present invention is a method for seismic reinforcement of a utility pole whose lower end is fixed to a fixed part, and is extended corresponding to the direction along the central axis of the utility pole and curved surface corresponding to the outer peripheral surface of the utility pole. A groove for fixing the lower end of the curved plate is formed around the electric pole in the fixed portion, and the lower end of the curved plate is fixed to the groove to fix the lower end of the electric pole in the fixed portion. Since the plurality of curved plates are installed so as to surround the outer peripheral surface of the power pole and the outer peripheral surface of the power pole protruding upward from the fixed portion, and the plurality of curved plates are connected to each other, the seismic reinforcement of the power pole with a high bending reinforcement effect The structure can be realized.
The seismic reinforcement structure for a utility pole according to the present invention is a seismic reinforcement structure for a utility pole whose lower end is fixed to a fixed part, and extends in accordance with the direction along the central axis of the utility pole and has a curved surface corresponding to the outer peripheral surface of the utility pole. The lower end is fixed to a groove formed around the electric pole in the fixed part, and surrounds the outer peripheral surface of the lower end of the electric pole in the fixed part and the outer peripheral surface of the electric pole protruding upward from the fixed part. Since it has a plurality of curved plates installed in and a connecting portion that couples the curved plates adjacent to each other along the circumferential direction of the utility pole, an earthquake-proof reinforcement structure for a utility pole with a high bending reinforcement effect is obtained.
In addition, the connecting portion is provided at each of the circumferential edges of the curved surfaces of the curved plates adjacent to each other, and the connecting flange of one curved plate and the connecting flange of the other curved plate, A connecting plate attached to the outer surface of the connecting flange of one curved plate and the connecting flange of the other curved plate, and a connecting flange of one curved plate and the other curved plate connected to each other A bolt through hole formed so as to pass through the flange and the accessory plate, a bolt provided so as to pass through the bolt through hole, and a bolt head screwed to the front end side of the bolt passing through the bolt through hole. A connecting flange of one curved plate and a nut fastened to the bolt so as to sandwich the connecting flange of the other curved plate and the accessory plate between them. It is possible, it is possible to obtain a seismic reinforcement structure of high shear reinforcing effect having a sufficient shear strength utility pole.
Further, a plurality of adjacent curved plates along the circumferential direction of the utility pole are connected by a connecting portion so as to surround the outer periphery of the utility pole on a cylindrical reinforcing member configured to surround the outer periphery of the utility pole. The configured cylindrical reinforcing member is arranged, the upper and lower cylindrical reinforcing members are connected to each other by a connecting portion, and the connecting portion is a circular flat plate provided at the upper end of the lower cylindrical auxiliary member that is butted against each other Attached to the outer surface of the ring-shaped connecting flange and the circular flat plate ring-shaped connecting flange provided at the lower end of the upper cylindrical reinforcing member, and the upper and lower circular flat plate ring-shaped connecting flanges butted against each other Attached plate, upper and lower circular flat plate ring-shaped connecting flanges and bolt through holes formed so as to pass through the attached plate, and bolts provided so as to pass through the bolt through holes And a nut fastened to the bolt so as to sandwich the upper and lower circular plate ring-shaped connecting flange and the accessory plate between the bolt head and screwed to the front end side of the bolt passing through the bolt through hole. The circular flat plate ring-shaped connecting flange is constituted by a plurality of connecting flanges provided at the other end in the extending direction of the plurality of curved plates adjacent to each other along the circumferential direction of the utility pole. Since it is attached to the outer surface of the plurality of connecting flanges so as to straddle adjacent connecting flanges along the direction, the vertical load can be transmitted to the power pole foundation, and the force when a bending moment acts on the power pole Since it can be reliably transmitted to the utility pole foundation, it is possible to obtain a seismic reinforcement structure for a utility pole with a high bending reinforcement effect. In addition, since the cylindrical reinforcing member is connected through the connecting portion in the direction along the central axis of the utility pole, the seismic reinforcement structure can be configured even when the length of the utility pole is long, and each cylindrical reinforcing member Since the overall length can be shortened, it is possible to easily assemble and transport the cylindrical reinforcing member.
The reinforcing member according to the present invention is a reinforcing member used for the seismic reinforcing method of the utility pole, and has a curved surface corresponding to the outer peripheral surface of the utility pole and extending in a direction along the central axis of the utility pole. A curved plate having a configuration in which one end portion in the extending direction is installed in a groove formed around the electric pole in the fixed portion and fixed to the fixed portion, and a portion other than the fixed portion of the curved plate Connecting flanges respectively provided at both edges of the curved surface in the circumferential direction, and using the reinforcing member, it is possible to configure a seismic reinforcing structure for a power pole having a high bending reinforcing effect. Become.

The perspective view which shows the seismic reinforcement structure of a utility pole. (A) is a front view which shows the earthquake-proof reinforcement structure of an electric pole, (b) is a side view which shows the earthquake-proof reinforcement structure of an electric pole. The disassembled perspective view which shows the earthquake-proof reinforcement structure of a utility pole. Sectional drawing of a 1st connection part. Sectional drawing of a 2nd connection part.

As shown in FIG. 1 and FIG. 2, the seismic reinforcement structure of the utility pole is a utility pole A, and an installation portion that becomes a lower end portion of the seismic reinforcement member 2 provided around the lower end portion A1 of the utility pole A and the lower end portion A1 of the utility pole A. The fixed part 1 which fixes 56, and the seismic reinforcement member 2 which seismically strengthens the utility pole A are provided.
The utility pole A is, for example, a reinforced concrete utility pole formed in a hollow cylindrical shape, and in the embodiment, an explanation will be given by taking an example of an earthquake-proof reinforcement structure of a utility pole used as a railway overhead pole.
The fixed portion 1 is, for example, a reinforced concrete electric pole base 10 provided on the side of a railway viaduct, and a lower end of the electric pole A inserted into a bottomed hole 11 in an upper opening formed in the electric pole base 10. A1 and a fixing means 12 such as a mortar for fixing the installation part 56 of the seismic reinforcing member 2 installed so as to surround the outer periphery of the lower end A1 of the utility pole A to the utility pole base part 10. The lower end A1 and the installation part 56 of the seismic reinforcement member 2 are fixed to the utility pole base 10 by the fixing means 12.
For example, the length of the utility pole A (the length in the direction along the central axis of the utility pole A) is about 10 m, and the length of the lower end A1 fixed to the utility pole base 10 is about 1.6 m.
The diameter of the bottomed hole 11 is such that the sand 14 can be filled between the outer peripheral surface of the lower end A1 of the power pole A inserted into the bottomed hole 11 and the inner peripheral surface of the bottomed hole 11. A dimension that is slightly larger than the outer diameter of the lower end A1 of A is determined. For example, if the outer diameter of the lower end A1 of the utility pole A is 400 mm, the hole diameter of the bottomed hole 11 is formed to 500 mm, and the outer peripheral surface and the bottom of the lower end A1 of the utility pole A inserted into the bottomed hole 11 A gap of 50 mm is formed between the inner peripheral surface of the hole 11.
The fixing structure of the lower end portion A1 of the utility pole A before the seismic reinforcement is applied to the outer peripheral surface of the lower end portion A1 of the utility pole A after the lower end portion A1 of the utility pole A is inserted into the bottomed hole 11 of the utility pole base portion 10. The sand 14 is packed in the gap between the inner peripheral surface of the bottomed hole 11 and the lower end portion A1 of the utility pole A is fixed to the utility pole base portion 10. The purpose is not to cause the utility pole A and the viaduct to resonate. However, since the utility pole A is configured to easily shake during an earthquake, sufficient bending reinforcement is required.
And the fixing | fixed part 1 of embodiment is upper opening of the bottomed hole 11 stuffed in the clearance gap between the outer peripheral surface of the lower end part A1 of the utility pole A, and the inner peripheral surface of the bottomed hole 11 of the utility pole base part 10. After removing (removing) the sand 14 on the side, the groove 13 for inserting the installation portion 56 of the seismic reinforcement member 2 is formed, and after the installation portion 56 of the earthquake resistance reinforcement member 2 is inserted into the groove 13, the groove 13 The installation portion 56 of the seismic reinforcement member 2 is fixed to the utility pole base 10 by filling the fixing means 12 such as mortar inside, and the lower end A1 of the utility pole A is fixed to the utility pole base 10 as described above. Structure.

  The seismic reinforcing member 2 is provided so as to surround the outer peripheral surface of the lower end A1 of the utility pole A in the utility pole base portion 10 and so as to surround the outer peripheral surface of the utility pole A protruding upward from the utility pole base portion 10. When the bending stress is concentrated on the boundary portion A2 between the portion (lower end portion A1) embedded in the utility pole base portion 10 in the utility pole A and the portion protruding upward from the utility pole base portion 10 during the earthquake. It is a member that increases the bending strength of the utility pole A and increases the shear strength of the utility pole A to seismically reinforce the utility pole A. The seismic reinforcement member 2 is made of, for example, a steel material.

  The seismic reinforcement member 2 is provided so as to be adjacent along the extension direction X of the utility pole A and covers a plurality of cylindrical reinforcement members 3; 3... Covering the outer peripheral surface of the utility pole A, and the extension direction of the utility pole A (of the utility pole A). A direction along the central axis) and a second connecting portion 4 that connects the upper and lower cylindrical reinforcing members 3; 3 adjacent to each other along X.

The cylindrical reinforcing member 3 is a first connecting the end portions of two halved reinforcing members 5; 5 and two halved reinforcing members 5; 5 adjacent to each other along the circumferential direction Y of the utility pole A. And a connecting portion 6.
The half-shaped reinforcing member 5 includes a curved plate 50, a first connecting flange 51, and a second connecting flange 52.
The curved plate 50 is configured to extend along the extension direction X of the utility pole A, and a cross section orthogonal to the extension direction is formed into a semicircular curved surface corresponding to the half circumference of the outer circumference of the utility pole A. That is, the curved plate 50 has a configuration in which a cylinder having a diameter (inner diameter) slightly larger than the diameter of the utility pole A is formed in a semi-cylindrical shape having a semicircular cross section obtained by dividing the cylinder into two along the central axis of the cylinder. .
As shown in FIG. 3, the semicircular curved surface forming the inner surface 53 of the curved plate 50 is provided with a plurality of convex portions 54; The protruding heights of the convex portions 54; 54... From the inner surface 53 of the curved plate 50 are formed to be equal. For example, a plurality of convex portions rows formed by a plurality of convex portions 54; 54... At predetermined intervals along the extending direction of the curved plate 50 are spaced at predetermined intervals along the circumferential direction of the curved plate 50. The convex portions 54 of the adjacent convex portion rows are arranged in a staggered arrangement along the extending direction of the curved plate 50.

As shown in FIG. 3, the first connecting flange 51 is provided at each of both end edges 55; 55 in the circumferential direction Y of the semicircular curved surface of the curved plate 50. The first connecting flanges 51; 51 respectively provided on the end edges 55; 55 are formed by flat plates extending in directions away from the end edges 55; 55, and the first connecting flanges 51; The flat plate surfaces are configured to be positioned on the same plane. That is, the first connecting flange 51 is formed by a long and narrow flat plate that is long in the direction along the extending direction X of the curved plate 50.
In addition, the half-shaped reinforcing member 5 is provided with an installation portion 56 (installed in the power pole base 10 in the power pole base 10 in the groove 13 formed around the lower end A1 of the power pole A fixed to the power pole base 10 described later. The thing of the structure which has the part which encloses the outer peripheral surface of lower end part A1, and the thing of the structure which does not have the said installation part 56 are used. In the half-shaped reinforcing member 5 having the installation portion 56, the first connecting flange 51 is an edge of the installation portion 56 provided on one end side in the extending direction of the half-shaped reinforcing member 5. 55; provided in a portion excluding 55. In addition, the lower end edge of the first connecting flange 51 in the half-shaped reinforcing member 5 having the installation portion 56 is formed so as to be inclined upward from the end edge 55 side (see FIG. 2; FIG. 3). When the utility pole A is shaken at the time of an earthquake with the half-shaped reinforcing member 5 fixed to the utility pole base portion 10, the lower end edge of the first connecting flange 51 and the upper surface of the utility pole base portion 10 do not easily interfere with each other. It is configured as follows.

  As shown in FIG. 3, the second connecting flange 52 is provided so as to extend from the other curved edge 57 that is the other end in the extending direction of the curved plate 50. The second connecting flange 52 extends from the other curved edge 57 so as to be away from the center of the arc of the semicircular curved surface of the curved plate 50, and the extended end corresponds to the semicircular curved surface of the curved plate 50. It is formed on a circular curved surface and is formed by a flat plate having the same thickness in the extending direction of the curved plate 50. That is, the second connecting flange 52 is formed by a half-divided body obtained by dividing the circular flat plate ring into two parts, that is, a thin circular plate ring half-divided long in the direction along the circumferential direction of the curved plate 50.

  The half-shaped reinforcing member 5 is formed, for example, by bending or pressing a long steel plate to form the curved plate 50 and bend from both end edges 55; 55 in the circumferential direction of the curved plate 50. The first connecting flange 51; 51 is formed, and one curved edge 57 that is the other end in the extending direction X of the curved plate 50 is connected to the second connecting flange 52 by fillet welding. Formed by.

  As shown in FIG. 1; FIG. 2; FIG. 3; FIG. 4, the first connecting portions 6 are respectively provided on the circumferential edges 55; 55 of the curved surfaces of the curved plates 50; The first connecting flange 51 of one curved plate 50 butted against each other, the first connecting flange 51 of the other curved plate 50, and the first connecting flange 51 of one curved plate 50 butted against each other. And the other connecting plate (vertical splice plate) 61; 61 attached to the outer surface 58; 58 of the first connecting flange of the other curved plate 50 (surface continuous with the outer surface of the curved plate 50). Bolt holes 62; 62... Formed so as to pass through the first connecting flange 51 of one curved plate 50, the first connecting flange 51 and the auxiliary plate 61; 61 of the other curved plate 50; Bolt through hole 62; 62 Of the curved plate 50 that is screwed to the front end side of the bolt 63 that penetrates the bolt 63 and the bolt holes 62; 62... The first connecting flange 51 and the nut 64 fastened to the bolt 63 so as to sandwich the first connecting flange 51 and the accessory plate 61; 61 of the other curved plate 50 are provided.

As shown in FIG. 1; FIG. 2; FIG. 3; FIG. 5, the second connecting portion 4 is a circular flat ring-shaped connecting flange 40 provided at the upper end of the lower cylindrical auxiliary member 3 butted against each other. And a circular flat plate ring-shaped connecting flange 40 provided at the lower end of the upper cylindrical reinforcing member 3 and outer surfaces of the upper and lower circular flat ring-shaped connecting flanges 40 butted against each other (the lower cylindrical auxiliary member 3 Two second connecting flanges 52; 52 forming the connecting flange 40; and two lower connecting flanges 52; 52 forming the upper cylindrical auxiliary member 3 respectively. Attached spigot plate (horizontal splice plate) 41; 41 and upper and lower circular flat plate ring-shaped connecting flanges 40; 2; 42..., Bolts 43 provided so as to pass through the bolt through holes 42; 42, and bolt heads 43 t that are screwed to the front ends of the bolts 43 that pass through the bolt through holes 42; 42. And a nut 44 fastened to the bolt 43 so as to sandwich the upper and lower circular flat ring-shaped connecting flanges 40; 40 and the accessory plate 41; 41 therebetween.
The circular flat ring-shaped connecting flange 40 is provided at the other end in the extending direction of the two curved plates 50; 50 of the two half-shaped reinforcing members 5; 5 adjacent to each other along the circumferential direction Y of the utility pole A. It is constituted by two second connecting flanges 52;
The accessory plate 41 is formed of a circular flat plate ring half corresponding to the second connecting flange 52 and spans two adjacent second connecting flanges 52; 52 along the circumferential direction Y of the utility pole A. Are attached to the outer surfaces of the two second connecting flanges 52; 52 (the second connecting flange 52 continuous with the outer surface of the curved plate 50; the lower surface 52a and the upper surface 52b of the 52).
That is, two splicing plates 41; 41 on the outer surface of the two second connecting flanges 52; 52 are attached. In this case, the circumferential end of the arc of the second connecting flange 52 and the arc of the splicing plate 41 are attached. The two auxiliary plates 41; 41 are arranged so that the circumferential ends of the two are located 90 ° apart in the circumferential direction of the utility pole A.

For example, the second connecting flange 52 formed of a circular flat plate ring half is formed of a steel plate thicker than the steel plate forming the curved plate 50 and the first connecting flange 51, and is circular. The splicing plate 41 formed by the flat plate ring halves is formed of a steel plate having substantially the same thickness as the second connecting flange 52, and the splicing plate 61 includes the second connecting flange 52 and the splicing plate 41. It is formed by a steel plate having a thicker thickness.
Further, a width that allows the attachment plate 41 to be inserted between the other end of the first connecting flange 51 and the second connecting flange 52 that are located on the other end side in the extending direction X of the curved plate 50. (See FIG. 5).

Next, a method for earthquake-proofing the utility pole A with the lower end A1 fixed to the utility pole base 10 using the earthquake-resistant reinforcement member 2 will be described.
First, one end side in the extending direction of two curved reinforcing members 5; 5 for forming the cylindrical reinforcing member 3 around the lower end A1 of the electric pole A fixed to the electric pole base 10 The upper opening groove 13 for installing the installation portion 56 (the edge 55 of the curved plate 50; a portion not provided with the first connecting flange 51 on the curved plate 50) provided on the (lower end side) is formed. As described above, the groove 13 is an upper opening of the bottomed hole 11 that is packed in a gap between the outer peripheral surface of the lower end A1 of the utility pole A and the inner peripheral surface of the bottomed hole 11 of the utility pole base 10. It is formed by removing (removing) the sand 14 on the side.
Then, the two half-shaped reinforcing members 5 for forming the cylindrical reinforcing member 3; 5 curved plates 50; 50 installation portions 56; 56 are inserted into the grooves 13, and the electric pole A in the electric pole base portion 10 is inserted. The outer peripheral surface of the lower end portion A1 is surrounded by the installation portions 56; 56, and the outer peripheral surface of the utility pole A protruding above the utility pole base portion 10 is surrounded by portions other than the installation portions 56; 56 of the curved plates 50; Two half-shaped reinforcing members 5;
That is, the surfaces of the first connecting flanges 51; 51 provided on both end edges 55; 55 in the circumferential direction of the semicircular curved surface of the curved plate 50 of one half-shaped reinforcing member 5, and the other The surfaces of the first connecting flanges 51; 51 provided on both end edges 55; 55 in the circumferential direction of the semicircular curved surface of the curved plate 50 of the half-shaped reinforcing member 5 are abutted with each other, The two half-shaped reinforcing members 5; 5 curved plates 50; 50 surround the outer peripheral surface of the utility pole A. The two half-shaped reinforcing members 5; Install in the groove 13.
Then, the first connecting flange 51; 51 of one half-shaped reinforcing member 5 and the outer surfaces 58; 58 of the first connecting flange 51; After attaching the attachment plates 61; 61, the first connection flanges 51; 51 butted to each other and the bolts formed on the attachment plates 61; 61 attached to the first connection flanges 51; A bolt 63 is passed through the hole 62, a nut 64 is screwed onto the tip of the penetrated bolt 63, and the first connecting flange 51 and the other of the curved plate 50 that are butted against each other with the bolt head 63t. The nuts 64 are fastened to the bolts 63 so that the first connecting flange 51 and the accessory plates 61; 61 of the curved plate 50 are sandwiched, whereby the two half-shaped reinforcing members 5; Connecting portion 6; linked by a 6 a cylindrical reinforcing member 3 configured.
In this case, since the plurality of convex portions 54 are provided on the inner surface 53 of the two halved reinforcing members 5; 5, the plurality of convex portions 54 come into contact with the outer peripheral surface of the utility pole A. Thus, the gap L (see FIG. 4) between the inner peripheral surface of the cylindrical reinforcing member 3 and the outer peripheral surface of the utility pole A is kept constant at the height of the convex portion 54.

Further, a cylinder is further provided above the cylindrical reinforcing member 3 configured to surround the outer peripheral surface of the lower end portion A1 of the utility pole A in the utility pole base 10 and the outer peripheral surface of the utility pole A protruding upward from the utility pole base portion 10. The reinforcing member 3 is formed.
In this case, the second reinforcing flange 52 provided at the other end of one half-shaped reinforcing member 5 of the cylindrical reinforcing member 3 positioned below and one half of the newly formed cylindrical reinforcing member 3 are divided. A second connecting flange 52 provided at one end of the cylindrical reinforcing member 5 and a second connecting flange 52 provided at the other end of the other half-divided reinforcing member 5 of the cylindrical reinforcing member 3 positioned below. And the second connecting flange 52 provided at the other end of the other half-divided reinforcing member 5 of the cylindrical reinforcing member 3 to be newly formed are brought into contact with each other and then positioned downward. And the second connecting flange 52 of the second split flange 52; the lower surface (outer surface) 52a; 52a of the second split flange 52; The upper surface (outer surface) 52b of 52; Serve 41; respectively, served plate 41. Then, the bolts 43 are inserted into the second connecting flanges 52; 52 butted to each other, and the bolt holes 42; 42... Formed in the attachment plates 41; 41 attached to the second connecting flanges 52; , The nut 44 is screwed onto the tip of the bolt 43 that has passed through the bolt holes 42; 42, and the second connecting flange of the one curved plate 50 that is butted against the bolt head 43t. The upper and lower half-shaped reinforcing members 5; 5 are connected by fastening the nut 44 to the bolt 43 so that the second connecting flange 52 and the accessory plate 61; A cylindrical reinforcing member 3 is further formed above the cylindrical reinforcing member 3.
The two second connecting flanges 52; 52a of the lower cylindrical reinforcing member 3 are attached to the lower surface 52a; 52a of the two cylindrical connecting members 41; 41, and the two second connecting portions of the upper cylindrical reinforcing member 3 are connected. Two attachment plates 41; 41 are attached to the upper surfaces 52b; 52b of the flanges 52; In this case, the attachment plate 41 is arranged such that the circumferential end of the arc of the second coupling flange 52 and the circumferential end of the attachment plate 41 are 90 ° apart from each other in the circumferential direction Y of the utility pole A. Be placed. The accessory plate 41 only needs to be provided so as to straddle two adjacent second connecting flanges 52; 52 along the circumferential direction Y of the utility pole A.

Then, a filler such as mortar (not shown) is filled between the inner peripheral surface of the cylindrical reinforcing member 3 and the outer peripheral surface of the utility pole A to improve the integrity of the cylindrical reinforcing member 3 and the utility pole A.
Moreover, the installation part 56 of the seismic reinforcement member 2 is fixed to the utility pole base 10 by filling the fixing means 12 such as mortar into the groove 13 in which the installation part 56 of the earthquake resistance reinforcement member 2 is inserted.

In addition, for example, the half-shaped reinforcing member 5 that forms the lower cylindrical reinforcing member 3 in which the installation portion (lower end portion) 56 is fixed to the utility pole base portion 10 has a length in the direction along the central axis of the utility pole A. Is about 2.4 m, of which the length of the installation portion 56 fixed to the utility pole base 10 is about 0.4 m.
Further, as the half-shaped reinforcing member 5 that does not have the installation portion 56 that forms the upper cylindrical reinforcing member 3, for example, the length in the direction along the central axis of the utility pole A is formed to be about 2.0 m. What is necessary is just to use.
However, as the half-shaped reinforcing member 5 that forms the upper cylindrical reinforcing member 3, the same structure as the half-shaped reinforcing member 5 that forms the lower cylindrical reinforcing member 3 is used by turning it upside down. It doesn't matter.

  According to the seismic reinforcement structure of the utility pole A configured as described above, the lower end portion of the cylindrical reinforcement member 3 (the installation portions 56; 56 of the two half-shaped reinforcement members 5: 5) is placed in the utility pole base portion 10. Since it is configured to be fixed, bending stress is applied to a boundary portion A2 (see FIG. 1) between the lower end portion A1 embedded in the utility pole base portion 10 and the portion protruding upward from the utility pole base portion 10 in the utility pole A. When concentrated, the bending strength of the utility pole A can be increased, and a seismic reinforcement structure for a utility pole having sufficient bending strength and a high bending reinforcement effect can be obtained.

Further, since the pair of half-shaped reinforcing members 5; 5 forming the cylindrical reinforcing member 3 are connected by the first connecting portion 6, the shear strength of the utility pole A can be increased, and sufficient shear strength is provided. Thus, it is possible to obtain a seismic reinforcement structure for a utility pole having a high shear reinforcement effect.
In particular, since the first connecting portion 6 includes the auxiliary plates 61; 61, it is possible to increase the shear strength of the utility pole A and to obtain an earthquake-proof reinforcement structure of the utility pole having a high shear reinforcement effect. .

  Moreover, since the inner surface 53 of the half-shaped reinforcing member 5 includes a plurality of convex portions 54; 54..., The plurality of convex portions 54; 54. At the time of filling the gap L between the outer peripheral surface and the inner peripheral surface of the cylindrical reinforcing member 3, the cylindrical reinforcing member 3 functions as a spacer for preventing the displacement and maintaining the gap L. Therefore, the cylindrical reinforcing member 3 can be assembled easily and accurately, the gap L can be kept constant, and a constant thickness is provided between the outer peripheral surface of the utility pole A and the inner peripheral surface of the cylindrical reinforcing member 3. Thus, the integrity of the utility pole A and the cylindrical reinforcing member 3; 3 is improved, the shear reinforcement effect of the utility pole A, the bending reinforcement effect of the utility pole A, and the deformation prevention effect of the utility pole A. It is possible to easily and accurately obtain a seismic reinforcement structure for a high-power pole.

Moreover, since the upper end of the lower cylindrical reinforcement member 3 arrange | positioned up and down and the lower end of the cylindrical reinforcement member 3 are connected by the 2nd connection part 4, the structure which can transmit a vertical load to the utility pole base part 10 Thus, since the force when a bending moment acts on the utility pole A can be reliably transmitted to the utility pole foundation 10, an earthquake-proof reinforcement structure for a utility pole having a high bending reinforcement effect can be obtained.
On the other hand, a seal member is filled between the lower end of the upper cylindrical component member and the upper end of the lower cylindrical component member of Patent Document 1, and the lower end of the upper cylindrical component member and the upper end of the lower cylindrical component member Therefore, in the seismic reinforcement structure of Patent Document 1, the vertical load cannot be transmitted to the base portion, and the bending reinforcement effect of the utility pole cannot be obtained.
That is, in the seismic reinforcement structure of the embodiment, a vertical load is applied as a configuration in which the upper end of the lower cylindrical reinforcing member 3 and the lower end of the cylindrical reinforcing member 3 which are arranged above and below are connected by the second connecting portion 4. A structure that can be transmitted to the utility pole base 10 so that the force when a bending moment acts on the utility pole A can be reliably transmitted to the utility pole base 10, and the bending stress is concentrated on the boundary A2 with increased bending strength. Therefore, it has a seismic reinforcement structure for utility poles with a high bending reinforcement effect.
In addition, since the second connecting portion 4 includes the spigot plates 41; 41, the rigidity of the second connecting portion 4 is increased so that the vertical load can be reliably transmitted to the utility pole base portion 10. did.
Moreover, since the cylindrical reinforcing member 3 can be connected via the second connecting portion 4 in the direction along the extension direction X of the utility pole A, the seismic reinforcement structure is configured even when the overall length of the utility pole A is long. In addition, since the overall length of the cylindrical reinforcing member 3 can be shortened, the assembling work of the cylindrical reinforcing member 3 can be easily performed, and a half-shaped reinforcing member for constituting the cylindrical reinforcing member 3 is possible. Since the overall length of 5 can be shortened, the transportability of the half-shaped reinforcing member 5 can be improved.

  Note that if the gap L between the inner peripheral surface of the cylindrical reinforcing member 3 and the outer peripheral surface of the utility pole A is reduced, the gap L may not be filled with a filler such as mortar. For example, if the gap L is 10 mm, the gap L is filled with a filler (not shown), and if the gap L is 2.5 mm, the gap need not be filled.

  In the above-described embodiment, the seismic reinforcement structure constituted by the upper and lower cylindrical reinforcing members 3; 3 is exemplified, but a pair of half-lengths in the direction along the central axis of the utility pole A (full length) is increased. Using the split reinforcing members 5; 5, a pair of halves so as to surround the outer peripheral surface of the lower end A1 of the utility pole A in the utility pole base 10 and the outer peripheral surface of the utility pole A protruding upward from the utility pole base 10 The cylindrical reinforcing member 5; 5 is arranged, and the pair of half-shaped reinforcing members 5; 5 first connecting flanges 51; 51 are connected to each other by the first connecting portion 6. It is good also as a seismic reinforcement structure using 3. That is, a plurality of cylindrical reinforcing members 3; 3... Are necessarily provided along a direction (extension direction X) along the central axis of the utility pole A, and the plurality of cylindrical reinforcing members 3; It is not necessary to use the seismic reinforcement structure having the configuration connected by 4, and the seismic reinforcement structure constituted by one cylindrical reinforcing member 3 may be used.

  Moreover, although the example which forms the cylindrical reinforcement member 3 using the two half-shaped reinforcement members 5; 5 was shown in embodiment mentioned above, two or more curved plates are used and the said several curved plate is used. A seismic reinforcement structure in which a cylindrical reinforcing member is formed so as to be connected to each other so as to surround the outer peripheral surface of the lower end A1 of the electric pole A in the electric pole base 10 and the outer peripheral surface of the electric pole A protruding upward from the electric pole base 10 It is also good.

  Further, the seismic reinforcement method and seismic reinforcement structure of the utility pole according to the present invention are suitable for the seismic reinforcement of a utility pole that is difficult to replace when it is damaged by an earthquake etc. However, it can also be applied to seismic reinforcement of utility poles standing on the road. In this case, a groove for installing the installation portion (lower end portion) 56 of the curved plate 50 is formed around the lower end portion of the utility pole that is embedded and fixed in the ground as the fixed portion, and the curved plate is formed in the groove. 50 installation portions (lower end portions) 56 may be installed and fixed.

DESCRIPTION OF SYMBOLS 1 Fixed part, 2 Seismic reinforcement member, 3 Cylindrical reinforcement member, 4 2nd connection part (connection part),
5 half-shaped reinforcing member (reinforcing member), 6 first connecting portion (connecting portion),
10 power pole base (fixed part), 13 grooves, 40 circular flat plate ring-shaped connecting flange,
41; 61 Saddle plate, 50 curved plate, 51 first coupling flange (coupling flange), 52 second coupling flange, 55 edge of curved plate, 56 installation portion (lower end of curved plate),
42; 62 bolt through hole, 43; 63 bolt, 44; 64 nut, A utility pole,
A1 Lower end of the utility pole.

Claims (5)

In the seismic reinforcement method for utility poles with the lower end fixed to the fixed part,
Using a plurality of curved plates extending corresponding to the direction along the central axis of the utility pole and having a curved surface corresponding to the outer peripheral surface of the utility pole,
Forming a groove for fixing the lower end of the curved plate around the electric pole in the fixing portion;
A plurality of curved plates are installed so as to surround the outer peripheral surface of the lower end portion of the utility pole in the fixed portion and the outer peripheral surface of the electric pole protruding upward from the fixed portion by fixing the lower end portion of the curved plate to the groove. A method for seismic reinforcement of utility poles, characterized in that curved plates are connected to each other. In the seismic reinforcement structure of utility poles whose lower end is fixed to the fixed part,
It extends corresponding to the direction along the central axis of the utility pole and has a curved surface corresponding to the outer peripheral surface of the utility pole, and the lower end is fixed to a groove formed around the utility pole in the fixed part. A plurality of curved plates installed to surround the outer peripheral surface of the lower end of the electric pole and the outer peripheral surface of the electric pole protruding upward from the fixed portion;
A seismic reinforcement structure for a power pole, comprising: a connecting portion that connects curved plates adjacent to each other along the circumferential direction of the power pole. The connecting part
A flange for connection of one curved plate and a flange for connection of the other curved plate, which are provided at the circumferential edges of the curved surfaces of the curved plates adjacent to each other and face each other;
An attachment plate attached to the outer surface of the connection flange of one curved plate and the connection flange of the other curved plate that are abutted against each other;
A bolt through-hole formed so as to penetrate the connecting flange of one curved plate and the connecting flange of the other curved plate and the attached plate, which are abutted with each other;
A bolt provided to penetrate the bolt through hole;
It is screwed to the front end side of the bolt that penetrates the bolt through hole, and is fastened to the bolt so that the connecting flange of one curved plate and the connecting flange of the other curved plate and the accessory plate are sandwiched between the bolt heads. The seismic reinforcement structure for a utility pole according to claim 2, further comprising a nut. A plurality of curved plates adjacent to each other along the circumferential direction of the utility pole are connected by a connecting portion and are configured to surround the outer periphery of the utility pole on a cylindrical reinforcing member configured to surround the outer periphery of the utility pole. The cylindrical reinforcing members are arranged, and the upper and lower cylindrical reinforcing members are connected to each other by a connecting portion,
The connecting part
A circular flat plate ring-shaped connecting flange provided at the upper end of the lower cylindrical auxiliary member abutted against each other, and a circular flat plate ring-shaped connecting flange provided at the lower end of the upper cylindrical reinforcing member;
Attached plates attached to the outer surfaces of the upper and lower circular flat plate ring-shaped connecting flanges that face each other;
Bolt holes formed so as to pass through upper and lower circular flat plate ring-shaped connecting flanges and attachment plates that are abutted against each other;
A bolt provided to penetrate the bolt through hole;
A screw that is screwed to the front end side of the bolt that penetrates the bolt through hole, and is fastened to the bolt so as to sandwich the upper and lower circular flat ring-shaped connecting flange and the accessory plate between the bolt head, and
The circular flat ring-shaped connecting flange is constituted by a plurality of connecting flanges provided at the other end in the extending direction of the plurality of curved plates adjacent along the circumferential direction of the utility pole,
The utility pole according to claim 2 or 3, wherein the attachment plate is attached to an outer surface of the plurality of coupling flanges so as to straddle a plurality of adjacent coupling flanges along a circumferential direction of the utility pole. Seismic reinforcement structure. A reinforcing member for use in the seismic reinforcing method for a utility pole according to claim 1,
It extends corresponding to the direction along the central axis of the power pole and has a curved surface corresponding to the outer peripheral surface of the power pole, and one end in the extension direction is installed in a groove formed around the power pole in the fixed part. A curved plate having a configuration formed in the fixing unit fixed to the fixing unit;
A reinforcing member, comprising: a connecting flange provided at each of both end edges in the circumferential direction of the curved surface in a portion other than the fixing portion of the curved plate.

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