JP6392577B2 - Reinforcing members used for seismic reinforcement of power poles - Google Patents

Reinforcing members used for seismic reinforcement of power poles Download PDF

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JP6392577B2
JP6392577B2 JP2014161601A JP2014161601A JP6392577B2 JP 6392577 B2 JP6392577 B2 JP 6392577B2 JP 2014161601 A JP2014161601 A JP 2014161601A JP 2014161601 A JP2014161601 A JP 2014161601A JP 6392577 B2 JP6392577 B2 JP 6392577B2
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utility pole
reinforcing member
curved
pole
peripheral surface
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JP2016037764A (en
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和徳 諏訪
和徳 諏訪
誠彦 本田
誠彦 本田
清水　政利
政利 清水
瑞樹 常本
瑞樹 常本
美宣 西内
美宣 西内
靖広 大越
靖広 大越
隆次 鈴木
隆次 鈴木
多香 大谷
多香 大谷
智温 三國
智温 三國
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Railway Technical Research Institute
Kumagai Gumi Co Ltd
Technos Co Ltd
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Railway Technical Research Institute
Kumagai Gumi Co Ltd
Technos Co Ltd
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Description

本願発明は、曲げ補強効果の高い電柱の耐震補強構造を実現可能な電柱の耐震補強方法に用いられる補強部材に関するものである。 The present invention relates to a reinforcing member used in a method for seismic reinforcement of a utility pole that can realize a seismic reinforcement structure of a utility pole having a high bending reinforcement effect.

電柱の周囲を補強部材としての筒状体で囲むようにした電柱の耐震補強構造が知られている（例えば特許文献１等参照）。   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).

特開２００５−３３６７４６号公報JP 2005-336746 A

特許文献１に開示された電柱の耐震補強構造では、地震時においてせん断補強効果はあるが、曲げ補強効果は期待できない。即ち、補強部材としての筒状体が地面上に位置しているため、地震時において電柱が揺れて電柱に曲げモーメントが作用し、電柱と地面との境界部である電柱の端部に曲げ応力が集中した場合、補強部材は当該曲げ応力に抵抗する部材とはならないため、当該電柱の端部が曲げ破壊を起こす可能性がある。
本発明は、曲げ補強効果の高い電柱の耐震補強構造を実現可能な電柱の耐震補強方法に用いられる補強部材を提供する。 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 reinforcing member used in a method for seismic reinforcement of a utility pole that can realize a seismic reinforcement structure of a utility pole having a high bending reinforcement effect.

本発明による電柱の耐震補強方法に用いられる補強部材は、下端部が固定部に固定された電柱の耐震補強方法が、電柱の中心軸に沿った方向に対応して延長するとともに電柱の外周面に対応した湾曲面を有した複数の湾曲板を用い、固定部における電柱の周囲に湾曲板の下端部を固定するための溝を形成し、湾曲板の下端部を溝に固定して固定部中の電柱の下端部の外周面及び固定部よりも上方に突出する電柱の外周面を囲むように複数の湾曲板を設置するとともに、当該複数の湾曲板を互いに連結する方法であり、当該電柱の耐震補強方法に用いられる補強部材であって、電柱の中心軸に沿った方向に対応して延長するとともに電柱の外周面に対応した湾曲面を有し、延長方向の一端部が、固定部における電柱の周囲に形成された溝に設置されて固定部に定着される定着部に形成された構成の湾曲板と、湾曲板の定着部以外の部分における湾曲面の周方向の両方の端縁にそれぞれ設けられた連結用フランジと、を備えたので、当該補強部材を用いて、曲げ補強効果の高い電柱の耐震補強構造を構成することが可能となる。 Reinforcing member used in the earthquake-proof reinforcement method of the electric pole according to the present invention, seismic reinforcement method for a utility pole having a lower end fixed to the fixing portion, the outer peripheral surface of the electric pole with extended in a direction along the central axis of the electric 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 fixed portion. together than the outer peripheral surface and the fixing portion of the lower end portion of the utility pole installing a plurality of curved plates so as to surround the outer peripheral surface of the utility pole projecting upwardly in a method of connecting the plurality of curved plates together, the utility pole A reinforcing member used in the seismic reinforcement method of the above, which 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 one end portion in the extending direction is a fixed portion Installed in the groove formed around the power pole in A curved plate having a configuration formed on the fixing portion fixed to the fixing portion and a connecting flange provided on each of both circumferential edges of the curved surface in a portion other than the fixing portion of the curved plate. Since it provided, it becomes possible to comprise the earthquake-proof reinforcement structure of the utility pole with a high bending reinforcement effect using the said reinforcement member.

電柱の耐震補強構造を示す斜視図。The perspective view which shows the seismic reinforcement structure of a utility pole. （ａ）は電柱の耐震補強構造を示す正面図、（ｂ）は電柱の耐震補強構造を示す側面図。(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. 電柱の耐震補強構造を示す分解斜視図。The disassembled perspective view which shows the earthquake-proof reinforcement structure of a utility pole. 第１の連結部の断面図。Sectional drawing of a 1st connection part. 第２の連結部の断面図。Sectional drawing of a 2nd connection part.

電柱の耐震補強構造は、図１；図２に示すように、電柱Ａと、電柱Ａの下端部Ａ１及び電柱Ａの下端部Ａ１の周囲に設けられる耐震補強部材２の下端部となる設置部５６を固定する固定部１と、電柱Ａを耐震補強する耐震補強部材２とを備える。
電柱Ａは、例えば、中空円柱状に形成された鉄筋コンクリート製の電柱であり、実施形態では、鉄道の架線柱として使用される電柱の耐震補強構造を例にして説明する。
固定部１は、例えば、鉄道の高架橋線路脇に設けられた鉄筋コンクリート製の電柱基礎部１０と、電柱基礎部１０に形成された上部開口の有底穴１１内に挿入される電柱Ａの下端部Ａ１及び当該電柱Ａの下端部Ａ１の外周囲を囲むように設置される耐震補強部材２の設置部５６を電柱基礎部１０に固定するためのモルタル等の固定手段１２とを備え、電柱Ａの下端部Ａ１及び耐震補強部材２の設置部５６が固定手段１２により電柱基礎部１０に固定された構成である。
例えば、電柱Ａの長さ（電柱Ａの中心軸に沿った方向の長さ）は１０ｍ程度であり、電柱基礎部１０に定着されている下端部Ａ１の長さは１．６ｍ程度である。
有底穴１１の穴径は、有底穴１１内に挿入される電柱Ａの下端部Ａ１の外周面と有底穴１１の内周面との間に砂１４を充填可能なように、電柱Ａの下端部Ａ１の外径よりも一回り大きい寸法に決められる。例えば、電柱Ａの下端部Ａ１の外径が４００ｍｍであれば有底穴１１の穴径は５００ｍｍに形成され、有底穴１１内に挿入される電柱Ａの下端部Ａ１の外周面と有底穴１１の内周面との間に５０ｍｍの隙間が形成されるように構成される。
耐震補強を行う前の電柱Ａの下端部Ａ１の固定構造は、電柱Ａの下端部Ａ１が電柱基礎部１０の有底穴１１内に挿入された後、電柱Ａの下端部Ａ１の外周面と有底穴１１の内周面との間の隙間に砂１４が詰め込まれたことによって、電柱Ａの下端部Ａ１が電柱基礎部１０に固定された構造であり、当該固定構造は、地震時において電柱Ａと高架橋とを共振させないことを目的としているが、地震時において電柱Ａが揺れやすいように構成されているため、十分な曲げ補強が必要となる。
そして、実施形態の固定部１は、電柱Ａの下端部Ａ１の外周面と電柱基礎部１０の有底穴１１の内周面との間の隙間に詰め込まれている有底穴１１の上部開口側の砂１４を撤去（除去）して耐震補強部材２の設置部５６を挿入するための溝１３を形成し、当該溝１３内に耐震補強部材２の設置部５６を挿入した後に、溝１３内にモルタル等の固定手段１２を充填することによって耐震補強部材２の設置部５６が電柱基礎部１０に固定されたとともに、上述したように電柱Ａの下端部Ａ１が電柱基礎部１０に固定された構造である。 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 A1 of the utility pole A and the lower end 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.

耐震補強部材２は、電柱基礎部１０において電柱Ａの下端部Ａ１の外周面を取り囲むように設けられるとともに、電柱基礎部１０よりも上方に突出する電柱Ａの外周面を取り囲むように設けられることによって、地震時において、電柱Ａにおける電柱基礎部１０中に埋め込まれている部分（下端部Ａ１）と電柱基礎部１０より上方に突出している部分との境界部Ａ２に曲げ応力が集中した場合の電柱Ａの曲げ耐力を上げるとともに、電柱Ａのせん断耐力を上げて、電柱Ａを耐震補強する部材である。耐震補強部材２は、例えば、鋼材により形成される。   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.

耐震補強部材２は、電柱Ａの延長方向Ｘに沿って隣接するように設けられて電柱Ａの外周面を覆う複数の円筒状補強部材３；３…と、電柱Ａの延長方向（電柱Ａの中心軸に沿った方向）Ｘに沿って隣接する上下の円筒状補強部材３；３の一端部同士を連結する第２の連結部４とを備える。   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.

円筒状補強部材３は、２つの半割り状補強部材５；５と、電柱Ａの周方向Ｙに沿って隣接する２つの半割り状補強部材５；５の端部同士を連結する第１の連結部６とを備える。
半割り状補強部材５は、湾曲板５０と、第１の連結用フランジ５１と、第２の連結用フランジ５２とを備える。
湾曲板５０は、電柱Ａの延長方向Ｘに沿って延長するとともに当該延長方向と直交する断面が電柱Ａの外周面の半周面に対応した半円湾曲面に形成された構成である。即ち、湾曲板５０は、電柱Ａの直径よりも若干大きい直径（内径）を有した円筒を当該円筒の中心軸に沿って２等分した断面半円形の半筒形状に形成された構成である。
図３に示すように、湾曲板５０の内面５３を形成する半円湾曲面には、複数の凸部５４；５４…が設けられている。当該各凸部５４；５４…の湾曲板５０の内面５３からの突出高さは等しい高さに形成される。例えば、複数の凸部５４；５４…が湾曲板５０の延長方向に沿って所定の間隔を隔てて形成された凸部列が、湾曲板５０の周方向に沿って所定の間隔を隔てて複数列設けられ、隣り合う凸部列の凸部５４が湾曲板５０の延長方向に沿って千鳥配列となるように構成される。 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.

図３に示すように、第１の連結用フランジ５１は、湾曲板５０の半円湾曲面の周方向Ｙにおける両方の端縁５５；５５にそれぞれに設けられる。当該端縁５５；５５にそれぞれ設けられた第１の連結用フランジ５１；５１は、当該端縁５５；５５より互いに離れる方向に延長する平板により形成され、当該第１の連結用フランジ５１；５１の平板面が同一平面上に位置されるように構成される。即ち、第１の連結用フランジ５１は、湾曲板５０の延長方向Ｘに沿った方向に長い長尺な細幅の平板により形成される。
尚、半割り状補強部材５は、後述する電柱基礎部１０に固定された電柱Ａの下端部Ａ１の周囲に形成された溝１３に設置される設置部５６（電柱基礎部１０において電柱Ａの下端部Ａ１の外周面を囲む部分）を有した構成のものと、当該設置部５６を有しない構成のものが用いられる。当該設置部５６を有した構成の半割り状補強部材５においては、第１の連結用フランジ５１は、当該半割り状補強部材５の延長方向の一端側に設けられる当該設置部５６の端縁５５；５５を除いた部分に設けられる。尚、設置部５６を有した半割り状補強部材５における第１の連結用フランジ５１の下端縁は、端縁５５側から上方に向けて傾斜するように形成され（図２；図３参照）、当該半割り状補強部材５が電柱基礎部１０に固定された状態において地震時に電柱Ａが揺れた場合に第１の連結用フランジ５１の下端縁と電柱基礎部１０の上面とが干渉しにくいように構成されている。 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 in a state where the half-shaped reinforcing member 5 is 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 are unlikely to interfere with each other. It is configured as follows.

図３に示すように、第２の連結用フランジ５２は、湾曲板５０の延長方向の他端である他方の湾曲縁５７より延長するように設けられる。第２の連結用フランジ５２は、湾曲板５０の半円湾曲面の円弧の中心より離れるように他方の湾曲縁５７より延長し、当該延長端が湾曲板５０の半円湾曲面に対応した半円湾曲面に形成され、湾曲板５０の延長方向の板厚寸法が等しい平板により形成される。即ち、第２の連結用フランジ５２は、円形平板リングを二分割した半割体、つまり、湾曲板５０の周方向に沿った方向に長い細幅の円形平板リング半割体により形成される。   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.

半割り状補強部材５は、例えば、長尺な鋼板を曲げ加工したりプレス加工することで湾曲板５０が形成されるとともに湾曲板５０の周方向の両方の端縁５５；５５より折れ曲がるように第１の連結用フランジ５１；５１が形成され、かつ、湾曲板５０の延長方向Ｘの他端である一方の湾曲縁５７と第２の連結用フランジ５２とが隅肉溶接にて接続されることによって形成される。   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.

図１；図２；図３；図４に示すように、第１の連結部６は、互いに隣り合う各湾曲板５０；５０の湾曲面の周方向の端縁５５；５５にそれぞれ設けられて互いに突き合わされた一方の湾曲板５０の第１の連結用フランジ５１及び他方の湾曲板５０の第１の連結用フランジ５１と、互いに突き合わされた一方の湾曲板５０の第１の連結用フランジ５１及び他方の湾曲板５０の第１の連結用フランジの外面５８；５８（湾曲板５０の外面と連続する面）にそれぞれ添えられた添え板（鉛直スプライスプレート）６１；６１と、互いに突き合わされた一方の湾曲板５０の第１の連結用フランジ５１と他方の湾曲板５０の第１の連結用フランジ５１及び添え板６１；６１を貫通するように形成されたボルト通孔６２；６２…と、ボルト通孔６２；６２…を貫通するように設けられたボルト６３と、ボルト通孔６２；６２…を貫通したボルト６３の先端側に螺着されて、ボルト頭６３ｔとの間で互いに突き合わされた一方の湾曲板５０の第１の連結用フランジ５１と他方の湾曲板５０の第１の連結用フランジ５１及び添え板６１；６１を挟み込むようにボルト６３に締結されたナット６４と、を備えて構成される。   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.

図１；図２；図３；図５に示すように、第２の連結部４は、互いに突き合わされた下の円筒状補部材３の上端に設けられた円形平板リング状の連結用フランジ４０及び上の円筒状補強部材３の下端に設けられた円形平板リング状の連結用フランジ４０と、互いに突き合わされた上下の円形平板リング状の連結用フランジ４０の外面（下の円筒状補部材３の連結用フランジ４０を形成する２つの第２の連結用フランジ５２；５２の下面５２ａ及び上の円筒状補部材３を形成する２つの第２の連結用フランジ５２；５２の上面５２ｂ）にそれぞれ添えられた添え板（水平スプライスプレート）４１；４１と、互いに突き合わされた上下の円形平板リング状の連結用フランジ４０；４０及び添え板４１；４１を貫通するように形成されたボルト通孔４２；４２…と、ボルト通孔４２；４２…を貫通するように設けられたボルト４３と、ボルト通孔４２；４２…を貫通したボルト４３の先端側に螺着されて、ボルト頭４３ｔとの間で上下の円形平板リング状の連結用フランジ４０；４０及び添え板４１；４１を挟み込むようにボルト４３に締結されたナット４４と、を備えて構成される。
円形平板リング状の連結用フランジ４０は、電柱Ａの周方向Ｙに沿って隣り合う２つの半割り状補強部材５；５の各湾曲板５０；５０における延長方向の他端に設けられた２つの第２の連結用フランジ５２；５２によって構成される。
添え板４１は、第２の連結用フランジ５２と対応する円形平板リング半割体により形成され、電柱Ａの周方向Ｙに沿って隣り合う２つの第２の連結用フランジ５２；５２に跨るように当該２つの第２の連結用フランジ５２；５２の外面（湾曲板５０の外面と連続する第２の連結用フランジ５２；５２の下面５２ａ及び上面５２ｂ）に添えられる。
即ち、２つの第２の連結用フランジ５２；５２の外面の２つの添え板４１；４１が添えられ、この場合、第２の連結用フランジ５２の円弧の周方向端部と添え板４１の円弧の周方向端部とが電柱Ａの周方向において９０°離れて位置するように２つの添え板４１；４１が配置される。 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.

尚、例えば、円形平板リング半割体により形成された第２の連結用フランジ５２は、湾曲板５０及び第１の連結用フランジ５１を形成する鋼板よりも板厚の厚い鋼板により形成され、円形平板リング半割体により形成された添え板４１は、第２の連結用フランジ５２とほぼ同じ板厚の鋼板により形成され、また、添え板６１は、第２の連結用フランジ５２及び添え板４１よりも板厚の厚い鋼板により形成される。
また、湾曲板５０の延長方向Ｘの他端側に位置される第１の連結用フランジ５１の他端と第２の連結用フランジ５２との間には、添え板４１を挿入可能な幅分の間隔Ｈが設けられている（図５参照）。 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).

次に、下端部Ａ１が電柱基礎部１０に固定された電柱Ａを耐震補強部材２を用いて耐震補強する方法について説明する。
まず、電柱基礎部１０に固定された電柱Ａの下端部Ａ１の周囲に、円筒状補強部材３を形成するための２つの半割り状補強部材５；５の湾曲板５０の延長方向の一端側（下端側）に設けられた設置部５６（湾曲板５０の端縁５５；５５に第１の連結用フランジ５１を備えない部分）を設置するための上部開口の溝１３を形成する。当該溝１３は、上述したように、電柱Ａの下端部Ａ１の外周面と電柱基礎部１０の有底穴１１の内周面との間の隙間に詰め込まれている有底穴１１の上部開口側の砂１４を撤去（除去）することにより形成される。
そして、円筒状補強部材３を形成するための２つの半割り状補強部材５；５の湾曲板５０；５０の設置部５６；５６を溝１３に挿入して電柱基礎部１０中の電柱Ａの下端部Ａ１の外周面を設置部５６；５６で囲み、かつ、湾曲板５０；５０の設置部５６；５６以外の部分で電柱基礎部１０よりも上方に突出する電柱Ａの外周面を囲むように２つの半割り状補強部材５；５を設置する。
即ち、一方の半割り状補強部材５の湾曲板５０の半円湾曲面の周方向における両方の端縁５５；５５にそれぞれ設けられた第１の連結用フランジ５１；５１の面と、他方の半割り状補強部材５の湾曲板５０の半円湾曲面の周方向における両方の端縁５５；５５にそれぞれ設けられた第１の連結用フランジ５１；５１の面とが、互いに突き合わされて、２つの半割り状補強部材５；５の湾曲板５０；５０が電柱Ａの外周面を取り囲むように、２つの半割り状補強部材５；５の湾曲板５０；５０の設置部５６；５６を溝１３に設置する。
そして、互いに突き合わされた一方の半割り状補強部材５の第１の連結用フランジ５１；５１及び他方の半割り状補強部材５の第１の連結用フランジ５１；５１の外面５８；５８にそれぞれ添え板６１；６１を添えた後に、互いに突き合わされた第１の連結用フランジ５１；５１及びこれら第１の連結用フランジ５１；５１に添えられた添え板６１；６１に形成されているボルト通孔６２にボルト６３を貫通させ、貫通したボルト６３の先端にナット６４を螺着して、ボルト頭６３ｔとの間で互いに突き合わされた一方の湾曲板５０の第１の連結用フランジ５１と他方の湾曲板５０の第１の連結用フランジ５１及び添え板６１；６１が挟み込まれるようにナット６４をボルト６３に締結することにより、２つの半割り状補強部材５；５が第１の連結部６；６によって連結されて円筒状補強部材３が構成される。
この場合、２つの半割り状補強部材５；５の湾曲板５０；５０の内面５３には複数の凸部５４が設けられているので、当該複数の凸部５４が電柱Ａの外周面に接触して、円筒状補強部材３の内周面と電柱Ａの外周面との間の隙間Ｌ（図４参照）が凸部５４の高さ寸法に一定に保たれる。 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.

そして、電柱基礎部１０中の電柱Ａの下端部Ａ１の外周面及び電柱基礎部１０よりも上方に突出する電柱Ａの外周面を取り囲むように構成された円筒状補強部材３の上方にさらに円筒状補強部材３を形成する。
この場合、下方に位置する円筒状補強部材３の一方の半割り状補強部材５の他端に設けられた第２の連結用フランジ５２と新たに形成する円筒状補強部材３の一方の半割り状補強部材５の一端に設けられた第２の連結用フランジ５２とを突き合わせるとともに、下方に位置する円筒状補強部材３の他方の半割り状補強部材５の他端に設けられた第２の連結用フランジ５２と新たに形成する円筒状補強部材３の他方の半割り状補強部材５の他端に設けられた第２の連結用フランジ５２とを突き合わせた状態とした後、下方に位置する半割り状補強部材５；５の第２の連結用フランジ５２；５２の下面（外面）５２ａ；５２ａ、及び、上方に位置する半割り状補強部材５；５の第２の連結用フランジ５２；５２の上面（外面）５２ｂ；５２ｂに、それぞれ、添え板４１；４１を添える。その後、互いに突き合わされた第２の連結用フランジ５２；５２及びこれら第２の連結用フランジ５２；５２に添えられた添え板４１；４１に形成されているボルト通孔４２；４２…にボルト４３を貫通させ、ボルト通孔４２；４２…を貫通したボルト４３の先端にナット４４を螺着して、ボルト頭４３ｔとの間で互いに突き合わされた一方の湾曲板５０の第２の連結用フランジ５２と他方の湾曲板５０の第２の連結用フランジ５２及び添え板６１；６１が挟み込まれるようにナット４４をボルト４３に締結することによって上下の半割り状補強部材５；５が連結され、円筒状補強部材３の上方にさらに円筒状補強部材３が形成される。
下の円筒状補強部材３の２つの第２の連結用フランジ５２；５２の下面５２ａ；５２ａに２つの添え板４１；４１が添えられ、上の円筒状補強部材３の２つの第２の連結用フランジ５２；５２の上面５２ｂ；５２ｂに２つの添え板４１；４１が添えられる。この場合、第２の連結用フランジ５２の円弧の周方向端部と添え板４１の円弧の周方向端部とが電柱Ａの周方向Ｙにおいて９０°離れて位置するように、添え板４１が配置される。尚、添え板４１は、電柱Ａの周方向Ｙに沿って隣り合う２つの第２の連結用フランジ５２；５２に跨るように設けられていればよい。 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.

そして、円筒状補強部材３の内周面と電柱Ａの外周面との間に図外のモルタル等の充填材を充填して円筒状補強部材３と電柱Ａとの一体性を向上させる。
また、耐震補強部材２の設置部５６が挿入されている溝１３内にモルタル等の固定手段１２を充填することによって耐震補強部材２の設置部５６を電柱基礎部１０に固定する。 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.

尚、例えば、設置部（下端部）５６が電柱基礎部１０に固定される下の円筒状補強部材３を形成する半割り状補強部材５は、電柱Ａの中心軸に沿った方向の長さが２．４ｍ程度であり、そのうち電柱基礎部１０に定着される設置部５６の長さが０．４ｍ程度に形成される。
また、上の円筒状補強部材３を形成する設置部５６を有しない半割り状補強部材５としては、例えば、電柱Ａの中心軸に沿った方向の長さが２．０ｍ程度に形成されたものを用いればよい。
但し、上の円筒状補強部材３を形成する半割り状補強部材５として、下の円筒状補強部材３を形成する半割り状補強部材５と同じ構成のものを、上下反転させて使用しても構わない。 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.

以上のように構成された電柱Ａの耐震補強構造によれば、円筒状補強部材３の下端部（２つの半割り状補強部材５：５の設置部５６；５６）を電柱基礎部１０中に定着させるように構成したので、電柱Ａにおける電柱基礎部１０中に埋め込まれている下端部Ａ１と電柱基礎部１０より上方に突出している部分との境界部Ａ２（図１参照）に曲げ応力が集中した場合の電柱Ａの曲げ耐力を上げることができ、十分な曲げ耐力を有した曲げ補強効果の高い電柱の耐震補強構造を得ることができる。   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.

また、円筒状補強部材３を形成する一対の半割り状補強部材５；５が第１の連結部６により連結されたので、電柱Ａのせん断耐力を上げることができ、十分なせん断耐力を有したせん断補強効果の高い電柱の耐震補強構造を得ることができる。
特に、当該第１の連結部６が、添え板６１；６１を備えた構成としたことにより、電柱Ａのせん断耐力をより大きくでき、せん断補強効果の高い電柱の耐震補強構造を得ることができる。 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. .

また、半割り状補強部材５の内面５３には複数の凸部５４；５４…を備えているので、当該複数の凸部５４；５４…が、円筒状補強部材３の形成時、電柱Ａの外周面と円筒状補強部材３の内周面との隙間Ｌへの充填材の充填作業時において、円筒状補強部材３のずれ止め、隙間Ｌを維持するためのスペーサとして機能する。よって、円筒状補強部材３を簡単かつ精度良く組み立てることができるとともに、隙間Ｌを一定に保持できて、電柱Ａの外周面と円筒状補強部材３の内周面との間に一定の厚さの充填材層を形成できるようになるので、電柱Ａと円筒状補強部材３；３との一体性が向上し、電柱Ａのせん断補強効果、電柱Ａの曲げ補強効果、電柱Ａの変形防止効果の高い電柱の耐震補強構造を簡単かつ精度良く得ることができるようになる。   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.

また、上下に配置された下の円筒状補強部材３の上端と円筒状補強部材３の下端とが第２の連結部４により連結されているので、鉛直荷重を電柱基礎部１０に伝達できる構造となっており、電柱Ａに曲げモーメントが作用した場合の力を電柱基礎部１０に確実に伝達できるようになるので、曲げ補強効果の高い電柱の耐震補強構造を得ることができる。
一方、特許文献１の上の筒構成部材の下端と下の筒構成部材の上端との間にはシール部材が充填され、かつ、上の筒構成部材の下端と下の筒構成部材の上端とが重なり合っているだけであるので、特許文献１の耐震補強構造では、鉛直荷重を基礎部に伝達できず、電柱の曲げ補強効果は得られない。
即ち、実施形態の耐震補強構造では、上下に配置された下の円筒状補強部材３の上端と円筒状補強部材３の下端とが第２の連結部４により連結された構成として、鉛直荷重を電柱基礎部１０に伝達できる構造とし、電柱Ａに曲げモーメントが作用した場合の力を電柱基礎部１０に確実に伝達できるようにして、曲げ耐力を上げた境界部Ａ２に曲げ応力を集中させることで、曲げ補強効果の高い電柱の耐震補強構造とした。
また、第２の連結部４が添え板４１；４１を備えた構成としたことにより、第２の連結部４の剛性を大きくして、鉛直荷重を電柱基礎部１０に確実に伝達できるようにした。
しかも、電柱Ａの延長方向Ｘに沿った方向に第２の連結部４を介して円筒状補強部材３を連結していける構造としたので、電柱Ａの全長が長い場合でも耐震補強構造を構成でき、また、円筒状補強部材３の全長を短くできるので、円筒状補強部材３の組立作業を容易に行うことが可能となり、また、円筒状補強部材３を構成するための半割り状補強部材５の全長を短くできるので、半割り状補強部材５の運搬性を向上させることができる。 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.

尚、円筒状補強部材３の内周面と電柱Ａの外周面との間の隙間Ｌを小さくすれば、当該隙間Ｌにモルタル等の充填材を充填しなくてもよい。例えば、当該隙間Ｌが１０ｍｍであれば、当該隙間Ｌには図外の充填材を充填し、当該隙間Ｌが２．５ｍｍであれば、当該隙間に充填材を充填しなくてもよい。   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.

また、上述した実施形態では、上下の円筒状補強部材３；３により構成された耐震補強構造を例示したが、電柱Ａの中心軸に沿った方向の長さ（全長）を長くした一対の半割り状補強部材５；５を用いて、電柱基礎部１０中の電柱Ａの下端部Ａ１の外周面及び電柱基礎部１０よりも上方に突出する電柱Ａの外周面を取り囲むように一対の半割り状補強部材５；５を配置し、当該一対の半割り状補強部材５；５の第１の連結用フランジ５１；５１同士を第１の連結部６により連結した構成の１つの円筒状補強部材３を用いた耐震補強構造としても良い。即ち、必ずしも電柱Ａの中心軸に沿った方向（延長方向Ｘ）に沿って複数の円筒状補強部材３；３…を設け、これら複数の円筒状補強部材３；３同士を第２の連結部４で連結した構成の耐震補強構造とする必要はなく、１つの円筒状補強部材３により構成された耐震補強構造としてもよい。   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.

また、上述した実施形態では、２つの半割り状補強部材５；５を用いて円筒状補強部材３を形成する例を示したが、２つ以上の湾曲板を用い、当該複数の湾曲板を互いに連結するようにして、電柱基礎部１０中の電柱Ａの下端部Ａ１の外周面及び電柱基礎部１０よりも上方に突出する電柱Ａの外周面を取り囲む円筒状補強部材を形成した耐震補強構造としても良い。   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.

また、本発明による電柱の耐震補強方法、耐震補強構造は、例えば、電車が常時通過する鉄道の線路脇に設けられて地震等で損傷した場合に取替え作業が困難な電柱の耐震補強化に好適であるが、道路に立設されている電柱の耐震補強化にも適用可能である。この場合、固定部としての地面に埋め込まれて固定されている電柱の下端部の周囲に湾曲板５０の設置部（下端部）５６を設置するための溝を形成して当該溝内に湾曲板５０の設置部（下端部）５６を設置して定着させればよい。   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.

１ 固定部、２ 耐震補強部材、３ 円筒状補強部材、４ 第２の連結部（連結部）、
５ 半割り状補強部材（補強部材）、６ 第１の連結部（連結部）、
１０ 電柱基礎部（固定部）、１３ 溝、４０ 円形平板リング状の連結用フランジ、
４１；６１ 添え板、５０ 湾曲板、５１ 第１の連結用フランジ（連結用フランジ）、５２ 第２の連結用フランジ、５５ 湾曲板の端縁、５６ 設置部（湾曲板の下端部）、
４２；６２ ボルト通孔、４３；６３ ボルト、４４；６４ ナット、Ａ 電柱、
Ａ１ 電柱の下端部。
1 fixed part, 2 seismic reinforcing member, 3 cylindrical reinforcing member, 4 second connecting part (connecting 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 (1)

下端部が固定部に固定された電柱の耐震補強方法が、
電柱の中心軸に沿った方向に対応して延長するとともに電柱の外周面に対応した湾曲面を有した複数の湾曲板を用い、
固定部における電柱の周囲に湾曲板の下端部を固定するための溝を形成し、
湾曲板の下端部を溝に固定して固定部中の電柱の下端部の外周面及び固定部よりも上方に突出する電柱の外周面を囲むように複数の湾曲板を設置するとともに、当該複数の湾曲板を互いに連結する方法であり、
当該電柱の耐震補強方法に用いられる補強部材であって、
電柱の中心軸に沿った方向に対応して延長するとともに電柱の外周面に対応した湾曲面を有し、延長方向の一端部が、固定部における電柱の周囲に形成された溝に設置されて固定部に定着される定着部に形成された構成の湾曲板と、
湾曲板の定着部以外の部分における湾曲面の周方向の両方の端縁にそれぞれ設けられた連結用フランジと、を備えたことを特徴とする補強部材。 Seismic reinforcement method for utility poles with lower end fixed to 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. The curved plates are connected to each other ,
A reinforcing member used in the seismic reinforcement method for the utility pole,
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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