JP2010043505A - Method of replacing main pole member of steel tower - Google Patents

Method of replacing main pole member of steel tower Download PDF

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JP2010043505A
JP2010043505A JP2008227606A JP2008227606A JP2010043505A JP 2010043505 A JP2010043505 A JP 2010043505A JP 2008227606 A JP2008227606 A JP 2008227606A JP 2008227606 A JP2008227606 A JP 2008227606A JP 2010043505 A JP2010043505 A JP 2010043505A
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temporary
main column
main
tower
existing
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JP5187627B2 (en
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Masayoshi Yasutomi
正佳 安富
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Denro Corp
株式会社デンロコーポレーション
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<P>PROBLEM TO BE SOLVED: To provide a main pole member replacing method allowing the replacement of a main pole member at a cross arm mounting part without transferring an electric wire to a temporary steel tower in an existing steel tower for power transmission constituted of steel members of angle steel. <P>SOLUTION: The main pole member replacing method for reinforcing a main pole member replacement panel to replace the main pole member includes steps of mounting temporary main pole members to two tower body faces not mounted with cross arms in the existing steel tower for power transmission constituted of steel members of angle steel; connecting the upper end of each temporary main pole member and a diagonal member mounting position of a temporary main pole member mounting face by a connecting temporary main pole member; connecting the lower end of each temporary main pole member and the diagonal member mounting position of the temporary main pole member mounting face by a connecting temporary main pole member; forming a truss structure between the two temporary main pole members; and mounting a temporary crossarm hanging member to the tip part of the crossarm from the truss structure between the temporary main pole members. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、山形鋼の鋼材で構成された送電用の既設鉄塔において、電線を仮設鉄塔に移設しなくても腕金取付け箇所の主柱材の取替えが可能な主柱材取替え工法に関するものである。  The present invention relates to a main column material replacement method that enables replacement of a main column material at an armrest attachment location without transferring an electric wire to a temporary tower in an existing power transmission tower composed of angle steel. is there.
送電用の既設鉄塔の一例を図17および図18に示す。鉄塔は4本の主柱材と、トラス構造を形成する複数の斜材および水平材からなる腹材と、電線を支持する複数の腕金とで構成されている。主柱材は、地盤に埋設され四角形状に配置された基礎体に支持されている。腹材は、4本の主柱材間を結ぶようにして、両端が各主柱材に固定され、4本の主柱材間にトラス構造の4面を構成している。鉄塔を構成する部材が、腐食した場合や地震などにより損傷を受けた場合には、部材の取替えを行う必要がある。  An example of an existing steel tower for power transmission is shown in FIGS. The steel tower is composed of four main pillar members, abdominal members made of a plurality of diagonal members and horizontal members forming a truss structure, and a plurality of braces that support electric wires. The main pillar material is supported by a foundation body embedded in the ground and arranged in a square shape. The abdomen is fixed to each main column member so as to connect the four main column members, and constitutes four surfaces of the truss structure between the four main column members. When a member constituting the steel tower is corroded or damaged by an earthquake or the like, it is necessary to replace the member.
部材の取替え作業の中で、他の部材よりも応力の大きい主要構成材である主柱材の取替え作業は非常に困難な作業である。鉄塔の主柱材を取替える方法として、従来、次に示すものが提案されている。  Of the member replacement work, the replacement work of the main pillar material, which is the main component material having a greater stress than the other members, is a very difficult task. Conventionally, the following methods have been proposed as methods for replacing the main pillar material of a steel tower.
鉄塔の主柱材を取替える場合に用いられるもので、取替え主柱材の上下に位置する健全な主柱材に取替え装置を取付け、油圧シリンダを押出して取替え主柱材に発生している応力を取替え装置で受けることで、主柱材の取替えを行う主柱材取替え装置が提案されている(例えば、特許文献1参照。)。  It is used when replacing the main pillar material of a steel tower.A replacement device is attached to a healthy main pillar material located above and below the replacement main pillar material, and the hydraulic cylinder is pushed out to reduce the stress generated in the replacement main pillar material. A main pillar material replacement device that replaces the main pillar material by receiving it with the replacement device has been proposed (see, for example, Patent Document 1).
既設鉄塔の上部に被冠して仮設鉄塔を設け、既設鉄塔に支持された電線を仮設鉄塔に移設し、既設鉄塔上部の部材に発生している応力を低減して、仮設鉄塔に覆われた既設鉄塔上部の部材取替えを行う方法が提案されている(例えば、特許文献2参照。)。  A temporary steel tower was put on the upper part of the existing steel tower, and the electric wires supported by the existing steel tower were transferred to the temporary steel tower, and the stress generated in the members on the upper part of the existing steel tower was reduced and covered with the temporary steel tower. There has been proposed a method of exchanging members at the upper part of an existing steel tower (for example, see Patent Document 2).
特開平8−163729号公報JP-A-8-163729 特開2002−147064号公報JP 2002-147064 A
しかしながら、従来の主柱材取替え装置を用いて、腕金取付け箇所の主柱材を取替える場合、一般的な鉄塔の主柱材は、鉄塔の頂部から最下部まで直線的でなく、下段腕金の下面位置に曲げ部が設けられており、主柱材取替え装置は取替え主柱材の上下に位置する健全な主柱材に取付けるため、曲げ部を挟んで装置を取付ける必要があり、装置を取付けることができないという問題があった。  However, when replacing the main column material at the armrest mounting location using the conventional main column material replacement device, the main column material of a general steel tower is not straight from the top to the bottom of the tower, but the lower armrest There is a bend at the lower surface position of the main column material replacement device, because the main column material replacement device is attached to a healthy main column material located above and below the replacement main column material. There was a problem that it could not be installed.
既設鉄塔の上部に被冠して仮設鉄塔を設ける方法の場合、腕金取付け箇所の主柱材を取替えることは可能であるが、既設鉄塔に支持された電線を仮設鉄塔に移設する必要があるため、作業が大掛かりになるという問題があった。また、取替え対象となる主柱材を取外すために、取替え主柱材より上方の健全な部材も全て取外す必要があり、作業効率が悪く、作業に時間がかかるという問題があった。  In the case of the method of providing a temporary steel tower by covering the upper part of the existing steel tower, it is possible to replace the main pillar material of the arm bracket mounting location, but it is necessary to transfer the electric wire supported by the existing steel tower to the temporary steel tower Therefore, there is a problem that the work becomes large. Further, in order to remove the main pillar material to be replaced, it is necessary to remove all the healthy members above the replacement main pillar material, which has a problem in that work efficiency is poor and work takes time.
前述の問題を有利に解決するために、本発明の鉄塔の主柱材取替え工法は、山形鋼の鋼材で構成された送電用の既設鉄塔において、既設鉄塔の4面の塔体面の内、腕金が取付いていない2面の中央位置に主柱材取替えパネルの上端と下端を結ぶように仮主柱材を取付ける工程と、仮主柱材の上端部と、仮主柱材の上端部より1パネル上方で仮主柱材取付面の既設主柱材の斜材取付位置とを接続用仮主柱材で接続し、同一塔体面の接続用仮主柱材の上端側の取付位置間に仮水平材を取付ける工程と、仮主柱材の下端部と、仮主柱材の下端部より1パネル下方で仮主柱材取付面の既設主柱材の斜材取付位置とを接続用仮主柱材で接続し、同一塔体面の接続用仮主柱材の下端側の取付位置間に仮水平材を取付ける工程と、2本の仮主柱材間にトラス構造を形成する工程と、取替え主柱材に取付いている腕金の既設腕金吊材を取外し、前記仮主柱材間のトラス構造部から腕金の先端部に仮腕金吊材を取付ける工程と、により主柱材取替えパネルの補強を行い、取替え対象の主柱材を取替える工法である。  In order to advantageously solve the above-described problem, the main column material replacement method of the steel tower of the present invention is an existing steel tower for power transmission made of steel of angle steel, and the arm of the four tower surfaces of the existing steel tower From the step of attaching the temporary main column material so that the upper end and the lower end of the main column material replacement panel are connected to the center position of the two surfaces where gold is not attached, the upper end portion of the temporary main column material, and the upper end portion of the temporary main column material Connect the diagonal mounting position of the existing main column material on the temporary main column mounting surface on the upper side of one panel with the connecting temporary main column material, and between the mounting positions on the upper end side of the connection temporary main column material on the same tower surface Temporary horizontal material mounting step, the lower end portion of the temporary main column material, and the diagonal material mounting position of the existing main column material on the temporary main column material mounting surface one panel below the lower end portion of the temporary main column material Connecting with the main column material, attaching the temporary horizontal material between the mounting positions on the lower end side of the connection temporary main column material on the same tower surface, and the truss between the two temporary main column materials Forming the structure and removing the existing armrest suspension material of the armrests attached to the replacement main pillar material, and attaching the temporary armrest suspension material from the truss structure between the provisional main pillar materials to the tip of the armrest This is a construction method in which the main pillar material replacement panel is reinforced by the process and the main pillar material to be replaced is replaced.
本発明の鉄塔の主柱材取替え工法によれば、既設鉄塔の主柱材取替えパネルに仮主柱材などを取付けて主柱材取替えパネルの補強を行うことで、仮設鉄塔を設置して、電線を移設することなく、腕金取付け箇所の主柱材の取替えができることから、作業が大掛かりにならず、また作業時間も短縮できる。  According to the main pillar material replacement method of the steel tower of the present invention, by installing a temporary main pillar material to the main pillar material replacement panel of the existing tower and reinforcing the main pillar material replacement panel, the temporary tower is installed, Since the main pillar material at the armrest attachment location can be replaced without relocating the electric wire, the work does not become large and the work time can be shortened.
送電用の既設鉄塔の一例を図17および図18に示す。鉄塔Aは4本の主柱材1と、トラス構造を形成する複数の斜材2および水平材3からなる腹材と、電線7を支持する複数の腕金4とで構成されている。主柱材1は、地盤に埋設され四角形状に配置された基礎体5に支持されている。腹材は、4本の主柱材間を結ぶようにして、両端が各主柱材1に固定され、4本の主柱材間にトラス構造の4面D1,D2,D3,D4を構成している。なお、図において、6は主柱材接続位置、C1〜C12はパネルを示している。  An example of an existing steel tower for power transmission is shown in FIGS. The steel tower A is composed of four main pillars 1, an abdomen composed of a plurality of diagonal members 2 and a horizontal member 3 forming a truss structure, and a plurality of braces 4 that support the electric wires 7. The main pillar 1 is supported by a base body 5 that is embedded in the ground and arranged in a square shape. The abdomen is fixed to each main column 1 so that the four main columns are connected to each other, and the four surfaces D1, D2, D3, D4 of the truss structure are formed between the four main columns. is doing. In addition, in the figure, 6 is a main pillar material connection position, C1-C12 has shown the panel.
鉄塔を構成する部材が、腐食した場合や地震などにより損傷を受けた場合には、部材の取替えを行う必要がある。部材の取替え作業の中で、他の部材よりも応力の大きい主要構成材である主柱材の取替えは非常に困難な作業であり、特に腕金取付け箇所の主柱材については、電線7の移設を伴う非常に大掛かりな取替え方法しかない。本発明は、山形鋼の鋼材で構成された送電用の既設鉄塔Aにおいて、電線7を仮設鉄塔に移設しなくても腕金取付け箇所の主柱材の取替えが可能な主柱材取替え工法であり、本発明の例として図17のC5〜C8パネルの主柱材を取替える場合について以下に説明する。  When a member constituting the steel tower is corroded or damaged by an earthquake or the like, it is necessary to replace the member. In the replacement work of the members, it is very difficult to replace the main pillar material, which is the main component material having a greater stress than the other members. There is only a very large replacement method with relocation. The present invention is a main column material replacement method in which, in an existing power transmission tower A composed of angle steel, the main column material can be replaced at the arm bracket attachment location without transferring the electric wire 7 to the temporary tower. A case where the main pillar material of the C5 to C8 panel of FIG. 17 is replaced will be described as an example of the present invention.
図1は仮主柱材を取付けた既設鉄塔の正面図、図2は図1のa−a線に沿う断面図、図3は既設鉄塔の斜材取付け状態図、図4は内付け斜材を取り外した既設鉄塔の正面図、図5は内付け斜材を取り外し、仮主柱材を取付けた既設鉄塔の正面図である。図において、18は腕金吊材、C5〜C8パネルは主柱材取替えパネルB、平行斜線(ハッチング)の箇所は取替え主柱材8を示している。また、図中の円記号はボルト位置11を示している。  1 is a front view of an existing steel tower with a temporary main column attached, FIG. 2 is a cross-sectional view taken along the line aa in FIG. 1, FIG. 3 is a diagram showing a state in which the existing steel tower is installed, and FIG. FIG. 5 is a front view of the existing steel tower from which the inner diagonal member is removed and the temporary main pillar material is attached. In the figure, reference numeral 18 denotes a brace material, C5 to C8 panels represent main column material replacement panels B, and parallel diagonal lines (hatched) indicate the replacement main column materials 8. A circle symbol in the figure indicates the bolt position 11.
本発明の主柱材取替え工法の第1の工程では、図1〜図2に示すように、山形鋼の鋼材で構成された送電用の既設鉄塔Aにおいて、既設鉄塔Aの4面の塔体面D1,D2,D3,D4の内、腕金4が取付いていない2面D1,D3の中央位置に主柱材取替えパネルBの上端と下端を結ぶように仮主柱材9を取付ける。この時、斜材2が図3に示すように、主柱材1の内側(以下、内付け2a)または主柱材1の外側(以下、外付け2b)に取付けられている場合、仮主柱材9を塔体面D1,D3の中央位置に主柱材取替えパネルBの上端と下端を結ぶように取付けるために、図4に示すように、主柱材取替えパネルBの内付けの斜材2aを取外す。図5に示すように、仮主柱材9を腕金4が取付いていない塔体面D1,D3の中央位置に主柱材取替えパネルBの上端と下端を結ぶように取付けた後は、図1に示すように、取外した斜材2a位置に新規の斜材10を取付ける。新規斜材10は、既設主柱材1と仮主柱材9間を結ぶようにして、両端が各主柱材に固定される。  In the first step of the main column material replacement method of the present invention, as shown in FIGS. 1 and 2, in the existing tower A for power transmission composed of steel of angle steel, the four tower surfaces of the existing tower A The temporary main pillar material 9 is attached so that the upper end and lower end of the main pillar material replacement panel B are connected to the center position of the two surfaces D1 and D3 where the arm 4 is not attached among D1, D2, D3, and D4. At this time, as shown in FIG. 3, when the diagonal member 2 is attached to the inner side of the main column member 1 (hereinafter referred to as the internal 2a) or the outer side of the main column member 1 (hereinafter referred to as the external 2b), In order to attach the column 9 to the center position of the tower surfaces D1 and D3 so as to connect the upper end and the lower end of the main column replacement panel B, as shown in FIG. Remove 2a. As shown in FIG. 5, after the temporary main column 9 is attached so that the upper end and the lower end of the main column replacement panel B are connected to the center position of the tower surfaces D1 and D3 to which the arm 4 is not attached, FIG. As shown, the new diagonal member 10 is attached to the position of the removed diagonal member 2a. Both ends of the new diagonal member 10 are fixed to the main column members so as to connect the existing main column members 1 and the temporary main column members 9.
図6は接続用仮主柱材の取付け状態図、図7は図6のb−b線から見た接続用仮主柱材の取付け状態図、図8は図6のc−c線から見た接続用仮主柱材の取付け状態図である。  FIG. 6 is a view showing an attachment state of the connection temporary main pillar material, FIG. 7 is a view showing the attachment state of the connection temporary main pillar material viewed from the line bb in FIG. 6, and FIG. It is the attachment state figure of the temporary main pillar material for connection.
第2の工程では、図6および図7に示すように、第1の工程で既設鉄塔Aの主柱材取替えパネルBに取付けた仮主柱材9の上端部と、仮主柱材9の上端部より1パネル上方C4で仮主柱材取付面D1,D3の既設主柱材1の斜材取付位置と、を接続用仮主柱材12で接続し、同一塔体面の接続用仮主柱材12の上端側の取付位置間に仮水平材15を取付ける。まず、接続用仮主柱材12を取付けるために、仮主柱材9の上端部より1パネル上方C4の仮主柱材取付面D1,D3の既設斜材2を取外す。次に、図6に示すように、仮主柱材9の上端部と、仮主柱材9の上端部より1パネル上方C4で仮主柱材取付面D1,D3の既設主柱材1の斜材取付位置とを接続用仮主柱材12で接続する。同一塔体面の接続用仮主柱材12の上端側の取付位置間に仮水平材15を取付ける。また、図7に示すように、接続用仮主柱材12と対向する塔体面の接続用仮主柱材12との間には、クロス形状に断面部材13を取付ける。  In the second step, as shown in FIGS. 6 and 7, the upper end portion of the temporary main column member 9 attached to the main column material replacement panel B of the existing tower A in the first step, and the temporary main column member 9 A connecting temporary main column member 12 connects the diagonal material mounting positions of the existing main column members 1 on the temporary main column member mounting surfaces D1 and D3 one panel above the upper end portion C4. The temporary horizontal member 15 is attached between the mounting positions on the upper end side of the column member 12. First, in order to attach the temporary connecting main column material 12 for connection, the existing diagonal members 2 on the temporary main column material mounting surfaces D1 and D3 on the upper panel C4 from the upper end of the temporary main column material 9 are removed. Next, as shown in FIG. 6, the upper end portion of the temporary main column member 9 and the existing main column member 1 on the temporary main column member mounting surfaces D <b> 1 and D <b> 3 at one panel upper side C <b> 4 from the upper end portion of the temporary main column member 9. The diagonal material mounting position is connected to the connecting temporary main pillar material 12. The temporary horizontal member 15 is attached between the attachment positions on the upper end side of the connection temporary main pillar member 12 on the same tower surface. Further, as shown in FIG. 7, a cross-sectional member 13 is attached in a cross shape between the connection temporary main column member 12 and the connection temporary main column member 12 on the tower body surface.
第3の工程では、図6および図8に示すように、第1の工程で既設鉄塔Aの主柱材取替えパネルBに取付けた仮主柱材9の下端部と、仮主柱材9の下端部より1パネル下方C9で仮主柱材取付面D1,D3の既設主柱材1の斜材取付位置と、を接続用仮主柱材12で接続し、同一塔体面の接続用仮主柱材12の下端側の取付位置間に仮水平材15を取付ける。まず、接続用仮主柱材12を取付けるために、仮主柱材9の下端部より1パネル下方C9の仮主柱材取付面D1,D3の既設斜材2を取外す。次に、図6に示すように、仮主柱材9の下端部と、仮主柱材9の下端部より1パネル下方C9で仮主柱材取付面D1,D3の既設主柱材1の斜材取付位置とを接続用仮主柱材12で接続する。同一塔体面の接続用仮主柱材12の下端側の取付位置間に仮水平材15を取付ける。また、図8に示すように、接続用仮主柱材12と対向する塔体面の接続用仮主柱材12との間には、クロス形状に断面部材13を取付ける。  In the third step, as shown in FIGS. 6 and 8, the lower end portion of the temporary main column 9 attached to the main column material replacement panel B of the existing tower A in the first step, and the temporary main column 9 The diagonal main material 1 is connected to the diagonal main material 1 of the existing main pillar 1 on the temporary main pillar material mounting surfaces D1 and D3 at a position C9 below the lower end by the connecting temporary main pillar 12 and is connected to the same column surface. The temporary horizontal member 15 is attached between the mounting positions on the lower end side of the column member 12. First, in order to attach the temporary connecting column 12 for connection, the existing diagonal members 2 on the temporary main column mounting surfaces D1 and D3 on the lower panel C9 are removed from the lower end portion of the temporary main column 9. Next, as shown in FIG. 6, the temporary main column member 9 has the lower end portion and the existing main column member 1 on the temporary main column member mounting surfaces D <b> 1 and D <b> 3 at one panel downward C <b> 9 from the lower end portion of the temporary main column member 9. The diagonal material mounting position is connected to the connecting temporary main pillar material 12. The temporary horizontal member 15 is attached between the attachment positions on the lower end side of the connection temporary main pillar member 12 on the same tower surface. Further, as shown in FIG. 8, a cross-sectional member 13 is attached in a cross shape between the connecting temporary main column member 12 and the connecting temporary main column member 12 on the tower body surface.
図9は図6のd−d線から見た仮主柱材間に形成したトラス構造を示す図、図10および図11は図9のe−e線に沿う断面図の例である。図10および図11の平行斜線(ハッチング)の水平材3は、取外される水平材3を示している。  FIG. 9 is a diagram showing a truss structure formed between temporary main column members as viewed from the line dd in FIG. 6, and FIGS. 10 and 11 are examples of cross-sectional views taken along the line ee in FIG. The horizontal members 3 in the hatched lines in FIGS. 10 and 11 indicate the horizontal members 3 to be removed.
第4の工程では、図9に示すように、2本の仮主柱材間に複数の仮斜材14および仮水平材15を用いてトラス構造E1,E2,E3,E4を形成し、仮主柱材9の補強を行う。図の仮主柱材間のトラス構造E1,E2,E3,E4は、既設鉄塔Aの腹材の結構に合わせた例を示している。この時、腕金取付け箇所の鉄塔断面は、図10および図11に示すように、取替え主柱材側の腕金取付面D4の既設水平材3を取外して、塔体付近の腕金主材間22を接続するように補強水平材16を取付け、鉄塔内部にはクロス形状に断面部材13を取付けて、腕金取付け箇所の鉄塔断面の補強を行う。  In the fourth step, as shown in FIG. 9, truss structures E1, E2, E3, E4 are formed using a plurality of temporary diagonal members 14 and temporary horizontal members 15 between two temporary main pillar members, The main pillar 9 is reinforced. The truss structures E1, E2, E3, and E4 between the temporary main pillars in the figure show examples in accordance with the structure of the abdomen of the existing steel tower A. At this time, as shown in FIGS. 10 and 11, the cross section of the steel tower at the position where the arm bracket is attached is obtained by removing the existing horizontal member 3 from the arm metal attaching surface D4 on the replacement main pillar material side, and between the arm metal main parts 22 near the tower body. The reinforcing horizontal member 16 is attached so as to connect the cross section, and the cross-section member 13 is attached in a cross shape inside the steel tower to reinforce the cross section of the steel tower at the position where the arm bracket is attached.
図12は仮腕金吊材を取付けた既設鉄塔の正面図、図13はトラス構造部への縦補強材取付け状態を示す図、図14は図13のf−f線から見た仮腕金吊材の取付け状態図である。第5の工程では、図12〜図14に示すように、主柱材取替えパネルBに取付いている腕金4の既設腕金吊材18を取外し、仮主柱材間に形成したトラス構造部E1,E4から腕金4の先端部に仮腕金吊材17を取付ける。まず、仮主柱材間に形成したトラス構造部E1,E4で腕金4を支持するため、図13に示すように、トラス構造部E1,E4には縦補強材20を取付ける。縦補強材20には、図14に示すように、仮腕金吊材17を取付けるための仮腕金吊材用金具19を取付け、取替え主柱材側の腕金4の既設腕金吊材18を取外し、縦補強材20に取付けられた仮腕金吊材用金具19を介してトラス構造部E1,E4と腕金4の先端部を結ぶように仮腕金吊材17を取付ける。  FIG. 12 is a front view of an existing steel tower to which a temporary arm metal suspension member is attached, FIG. 13 is a view showing a state in which a vertical reinforcing member is attached to the truss structure portion, and FIG. 14 is a temporary arm metal as seen from the line ff in FIG. It is an attachment state figure of a hanging material. In the fifth step, as shown in FIGS. 12 to 14, the truss structure part formed between the temporary main column members by removing the existing armrest suspension members 18 of the arm members 4 attached to the main column member replacement panel B. The temporary arm metal suspension member 17 is attached to the tip of the arm metal 4 from E1 and E4. First, in order to support the brace 4 with the truss structure portions E1 and E4 formed between the temporary main column members, as shown in FIG. 13, the vertical reinforcing member 20 is attached to the truss structure portions E1 and E4. As shown in FIG. 14, the vertical reinforcement member 20 is provided with a metal arm 19 for a temporary arm metal suspension material for attaching the temporary arm metal suspension material 17, and the existing arm metal suspension material of the arm metal 4 on the replacement main pillar material side. 18 is removed, and the temporary arm metal suspension material 17 is attached so as to connect the truss structure parts E1 and E4 and the distal end portion of the arm metal 4 via the temporary arm metal suspension metal fitting 19 attached to the vertical reinforcing member 20.
図15は取替え主柱材の取外し後の既設鉄塔の正面図、図16は取替え主柱材取外し後の鉄塔の構成を示す正面図である。図16に示すように、第1〜第5の工程で、仮主柱材9などにより主柱材取替えパネルBの補強を行うことで、主柱材取替え時は図16の実線で示すトラス構造として、応力が伝達されるようになるため、取替え主柱材8に発生する応力を仮主柱材9で負担するようになり、図15に示すように、既設主柱材1を取外しても、鉄塔Aが倒壊することはない。図16において、破線部は主柱材取替え時の既設鉄塔の形状を示している。  FIG. 15 is a front view of the existing steel tower after the replacement main pillar material is removed, and FIG. 16 is a front view showing the structure of the steel tower after the replacement main pillar material is removed. As shown in FIG. 16, in the first to fifth steps, the main column material replacement panel B is reinforced by the temporary main column material 9 or the like, so that the truss structure shown by the solid line in FIG. 16 when the main column material is replaced. Since the stress is transmitted, the temporary main column material 9 bears the stress generated in the replacement main column material 8, and even if the existing main column material 1 is removed as shown in FIG. The steel tower A will not collapse. In FIG. 16, the broken line portion indicates the shape of the existing steel tower when the main pillar material is replaced.
主柱材取替え時には、取替え主柱材8に取付いている部材のボルトを外して、取替え主柱材8を取外し、新規の主柱材を取付けた後は、仮主柱材9,接続用仮主柱材12,仮主柱材間のトラス構造部E1,E2,E3,E4,仮腕金吊材17などを取外す。次いで、第2および第3の工程で取外した既設斜材2、第4の工程で取外した既設水平材3、第5の工程で取外した既設腕金吊材18などを取付けて、主柱材の取替え作業が完了する。  When replacing the main column material, remove the bolts of the members attached to the replacement main column material 8, remove the replacement main column material 8, and install the new main column material. The truss structures E1, E2, E3, E4 between the main column 12 and the temporary main column are removed. Next, the existing diagonal member 2 removed in the second and third steps, the existing horizontal member 3 removed in the fourth step, the existing arm metal suspension member 18 removed in the fifth step, etc. are attached, and the main pillar material The replacement work is completed.
このように、本発明の鉄塔の主柱材取替え工法によれば、仮主柱材9などで主柱材取替えパネルBの補強を行うことで、仮設鉄塔を設置して、電線7を移設することなく、腕金取付け箇所の既設主柱材の取替えが可能であり、また作業時間も短縮できる。  Thus, according to the main column material replacement method of the steel tower of the present invention, the temporary column material replacement panel B is reinforced with the temporary main column material 9 or the like, so that the temporary steel tower is installed and the electric wires 7 are transferred. Therefore, it is possible to replace the existing main pillar material at the location where the arm bracket is attached, and the work time can be shortened.
仮主柱材を取付けた既設鉄塔の正面図  Front view of existing steel tower with temporary main column 図1のa−a線に沿う断面図  Sectional drawing which follows the aa line of FIG. 既設鉄塔の斜材取付け状態図  Diagram of diagonal installation of existing steel tower 内付け斜材を取り外した既設鉄塔の正面図  Front view of the existing tower with the internal diagonal removed 内付け斜材を取り外し、仮主柱材を取付けた既設鉄塔の正面図  Front view of an existing steel tower with internal diagonal members removed and temporary main pillars attached 接続用仮主柱材の取付け状態図  Connection state diagram of temporary column for connection 図6のb−b線から見た接続用仮主柱材の取付け状態図  FIG. 6 is a view showing the connection state of the temporary connecting pillar material for connection as seen from the line bb in FIG. 図6のc−c線から見た接続用仮主柱材の取付け状態図  FIG. 6 is a view showing the connection state of the temporary connecting pillar material for connection as seen from the line cc in FIG. 図6のd−d線から見た仮主柱材間に形成したトラス構造を示す図  The figure which shows the truss structure formed between the temporary main pillar materials seen from the dd line of FIG. 図9のe−e線に沿う断面図の例  Example of sectional view along line ee in FIG. 図9のe−e線に沿う断面図の例  Example of sectional view along line ee in FIG. 仮腕金吊材を取付けた既設鉄塔の正面図  Front view of an existing steel tower with a temporary arm suspension トラス構造部への縦補強材の取付け状態図  Installation diagram of vertical reinforcement on truss structure 図13のf−f線から見た仮腕金吊材の取付け状態図  FIG. 13 is a view showing the state of attachment of the temporary arm suspension member viewed from the line ff in FIG. 取替え主柱材取外し後の既設鉄塔の正面図  Front view of the existing steel tower after the replacement main pillar material is removed 取替え主柱材取外し後の鉄塔の構成を示す正面図  Front view showing the structure of the steel tower after the replacement main pillar material is removed 送電用の既設鉄塔の構成を示す正面図  Front view showing the structure of an existing tower for power transmission 送電用の既設鉄塔の構成を示す上面図  Top view showing the structure of an existing tower for power transmission
符号の説明Explanation of symbols
A 既設鉄塔
B 主柱材取替えパネル
C1〜C12 パネル
D1〜D4 塔体面
E1〜E4 トラス構造部
1 主柱材
2 斜材
2a 内付け斜材
2b 外付け斜材
3 水平材
4 腕金
5 基礎体
6 主柱材接続位置
7 電線
8 取替え主柱材
9 仮主柱材
10 新規斜材
11 ボルト位置
12 接続用仮主柱材
13 断面部材
14 仮斜材
15 仮水平材
16 補強水平材
17 仮腕金吊材
18 腕金吊材
19 仮腕金吊材用金具
20 縦補強材
21 腕金主材
A Existing steel tower B Main column material replacement panel C1 to C12 Panel D1 to D4 Tower surface E1 to E4 Truss structure part 1 Main column material 2 Diagonal material 2a Internal diagonal material 2b External diagonal material 3 Horizontal material 4 Arm metal 5 Base body 6 Main column material connection position 7 Electric wire 8 Replacement main column material 9 Temporary main column material 10 New diagonal material 11 Bolt position 12 Temporary main column material 13 for connection Cross section member 14 Tempered diagonal material 15 Temporary horizontal material 16 Reinforced horizontal material 17 Temporary arm Metal hanger 18 Arm metal hanger 19 Temporary metal hanger bracket 20 Vertical reinforcement 21 Arm metal main material

Claims (1)

  1. 山形鋼の鋼材で構成された送電用の既設鉄塔において、
    既設鉄塔の4面の塔体面の内、腕金が取付いていない2面の中央位置に主柱材取替えパネルの上端と下端を結ぶように仮主柱材を取付ける工程と、
    仮主柱材の上端部と、仮主柱材の上端部より1パネル上方で仮主柱材取付面の既設主柱材の斜材取付位置とを接続用仮主柱材で接続し、同一塔体面の接続用仮主柱材の上端側の取付位置間に仮水平材を取付ける工程と、
    仮主柱材の下端部と、仮主柱材の下端部より1パネル下方で仮主柱材取付面の既設主柱材の斜材取付位置とを接続用仮主柱材で接続し、同一塔体面の接続用仮主柱材の下端側の取付位置間に仮水平材を取付ける工程と、
    2本の仮主柱材間にトラス構造を形成する工程と、
    取替え主柱材に取付いている腕金の既設腕金吊材を取外し、前記仮主柱材間のトラス構造部から腕金の先端部に仮腕金吊材を取付ける工程と、
    により主柱材取替えパネルの補強を行い、主柱材を取替えることを特徴とする鉄塔の主柱材取替え工法。
    In the existing steel tower for power transmission composed of steel of angle steel,
    The step of attaching the temporary main column material so as to connect the upper end and the lower end of the main column material replacement panel to the center position of the two surfaces of the four tower bodies of the existing steel tower where the armor is not attached,
    Connect the upper end of the temporary main column and the diagonal mounting position of the existing main column on the temporary main column mounting surface one panel above the upper end of the temporary main column with the connection temporary main column. A step of attaching a temporary horizontal material between the mounting positions on the upper end side of the temporary main pillar material for connection of the tower surface,
    Connect the lower end of the temporary main column and the diagonal mounting position of the existing main column on the temporary main column mounting surface one panel below the lower end of the temporary main column with the connection temporary main column. A step of attaching a temporary horizontal material between the attachment positions on the lower end side of the temporary main pillar material for connection of the tower surface,
    Forming a truss structure between the two temporary main pillars;
    Removing the existing armrest suspension material of the armrest attached to the replacement main pillar material, and attaching the temporary armrest suspension material from the truss structure between the temporary main pillar materials to the tip of the armrest;
    The main column material replacement construction method of the steel tower, which reinforces the main column material replacement panel and replaces the main column material.
JP2008227606A 2008-08-09 2008-08-09 Steel tower main column replacement method Expired - Fee Related JP5187627B2 (en)

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CN102661057A (en) * 2012-05-30 2012-09-12 衡水供电公司 Power angle tower pull leg main material changing method and special main material clamp
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CN105317236A (en) * 2015-11-25 2016-02-10 国家电网公司 Portable device for replacing iron tower main material clad steel for power transmission line
CN105370084A (en) * 2015-11-24 2016-03-02 中国电力科学研究院 Transmission tower made of weathering resistant steels
CN105370083A (en) * 2015-11-24 2016-03-02 中国电力科学研究院 Transmission tower made of alumetized steel
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