JP2012167459A - Steel tower rebuilding method - Google Patents
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Description
この発明は、送電線等の鉄塔の建替工法に関するもので、さらに詳しく述べると、既設鉄塔の敷地の範囲内で既設鉄塔の上から新設鉄塔を建てる、変則４５°包込工法による建替工法に関するものである。 The present invention relates to a rebuilding method for a steel tower such as a transmission line. More specifically, the rebuilding method based on an irregular 45 ° wrapping method in which a new steel tower is built on the existing steel tower within the range of the existing steel tower site. It is about.
送電容量の大型化に伴い、鉄塔を大きなものに建替える等、鉄塔の建替工事が必要とされるケースが頻繁にある。その様な場合、特に市街地では既設の鉄塔の周りに建物が密集し、新たに鉄塔用地を取得することは非常に困難な状況になっている。そこで、新たな敷地を必要とせず、既設の鉄塔の敷地内で短期間の工事を可能にする、鉄塔の建替工法の開発が要求されている。 As the transmission capacity increases, there are frequent cases where rebuilding work of the tower is required, such as rebuilding the tower to a larger one. In such a case, especially in an urban area, buildings are densely packed around existing steel towers, and it is very difficult to acquire a new tower site. Therefore, there is a demand for the development of a steel tower reconstruction method that does not require a new site and enables short-term construction within the existing steel tower site.
この様な建替え工法としては、例えば特許文献１に示すように、縦方向に配設される主柱材と、主柱材に対して横方向に配設される腹材を備えて構成されるパネルが複数段載積されるとともに、複数の送電線体を備えてなる送電鉄塔を建替する工法において、新設鉄塔の基礎を、既設鉄塔の基礎の間に配設し、既設の鉄塔に対して新設の鉄塔が、平面視において４５°方向を変えて建設されるとともに、新規鉄塔の複数段のパネルのうち、少なくとも一部のパネルが、水平補助材と当該水平補助材の中央部から下方に向かって両側に広がるように配設された斜材により構成されるＫ字型部を含む腹材とを備え、前記パネルを組み立てる際、主柱材と水平補助材との間に仮設材を設け、前記腹材の一部を既設パネルの外側に一時的に配設することにより、前記既設鉄塔との接触を回避しながら建設され、新規鉄塔の建設途中において前記既設鉄塔が撤去される工法がある。 As such a rebuilding method, for example, as shown in Patent Document 1, it is configured to include a main pillar material arranged in the vertical direction and a belly material arranged in the horizontal direction with respect to the main pillar material. In the method of rebuilding a transmission tower with multiple transmission lines, the foundation of the new tower is placed between the foundations of the existing tower, On the other hand, a new steel tower is constructed with the direction changed by 45 ° in plan view, and at least a part of the plurality of panels of the new steel tower comes from the horizontal auxiliary material and the central portion of the horizontal auxiliary material. An abdomen including a K-shaped part composed of diagonal members arranged so as to spread downward on both sides, and when assembling the panel, a temporary material between the main pillar material and the horizontal auxiliary material And temporarily disposing a part of the abdomen on the outside of the existing panel. By the built while avoiding contact with the existing steel towers, there is a method in which the existing tower is removed in the construction during the new tower.
しかしながら、新旧鉄塔の根開きが同程度の建替（例：既設用地内での元位置建替）において、前記特許文献１に示すような４５°包込工法を採用する場合、既設鉄塔の部材、特に腹材が、新設の鉄塔の腹材と相互に接触する等、必ず支障となる。その場合、既設鉄塔の複雑な改造や新設鉄塔への仮設材の挿入、建替え後の仮設材の撤去等の煩雑な作業を必要とし、これにより施工工事が長期化し、施工誤り等の要因となるおそれがある。 However, when the 45 ° wrapping method as shown in Patent Document 1 is adopted in the rebuilding (for example, the original position rebuilding in the existing site) where the opening of the old and new steel towers is the same, the members of the existing steel tower In particular, the abdomen will always interfere with the abdomen of the new tower. In that case, complicated work such as complicated modification of the existing steel tower, insertion of temporary material into the new steel tower, removal of temporary material after rebuilding is required, which causes construction work to be prolonged and causes factors such as construction errors. There is a risk.
そこで、この発明は、前記の従来工法の欠点を改善し、既設用地内で建替えることができ、容易にかつ短期間で施工できる鉄塔の建替工法を提供することを目的としたものである。 Then, this invention aims at providing the rebuilding method of the steel tower which can improve the fault of the said conventional construction method, can be rebuilt in the existing site, and can be constructed easily and in a short period of time. .
請求項１の発明は、複数の送電線支持体を有する送電線鉄塔の建替工法において、既設鉄塔の基礎間に新設鉄塔の基礎を夫々配設し、前記既設鉄塔に対して新設鉄塔が、平面視略４５°方向を変えて建設し、当該新設鉄塔は、前記各基礎から立設する各主柱材を、これらの主柱材の隣接する主柱材間に渡す水平材が、既設鉄塔の隣接する主柱材間で形成される外周面の外側に位置するまで略垂直に伸ばし、その後、前記既設鉄塔の外側で、各主柱材の間隔が次第に小さくなるように傾斜させて建設する、鉄塔の建替工法とした。 The invention of claim 1 is a rebuilding method for a transmission line tower having a plurality of transmission line supports, wherein the foundations of the new steel towers are respectively arranged between the foundations of the existing steel towers, and the new steel towers with respect to the existing steel towers, The new steel tower is constructed by changing the direction of about 45 ° in plan view, and the horizontal material passing between the main pillar materials erected from the foundations between the main pillar materials adjacent to these main pillar materials is the existing steel tower. It is extended substantially vertically until it is located outside the outer peripheral surface formed between adjacent main pillars, and then, outside the existing steel tower, it is constructed so as to be inclined so that the interval between the main pillars gradually decreases. The steel tower was rebuilt.
また、請求項２の発明は、前記請求項１の発明において、前記新設鉄塔の建設途中において前記既設鉄塔を撤去する、鉄塔の建替工法とした。 Further, the invention of claim 2 is the steel tower rebuilding method according to the invention of claim 1, wherein the existing steel tower is removed during the construction of the new steel tower.
また、請求項３の発明は、請求項１又は２の発明において、既設鉄塔の各脚部の主柱材間に渡している腹材を取り替えて、隣接する各主柱材間に開口部を設けるように改造し、前記垂直な主柱材間に渡す水平材と、既設鉄塔の腹材との接触を回避しながら建設する、鉄塔の建替工法とした。 The invention of claim 3 is the invention of claim 1 or 2, wherein the bellows passed between the main column members of each leg of the existing tower is replaced, and an opening is formed between the adjacent main column members. The steel tower was rebuilt so that it was constructed while avoiding contact between the horizontal material passed between the vertical main column members and the abdominal material of the existing steel tower.
請求項１〜３の発明によれば、新設鉄塔の主柱材の、基礎から立ち上げる脚部を略垂直に設け、これらの略垂直な主柱材の、隣接する主柱材間に渡す水平材が、既設鉄塔の隣接する主柱材間で構成される外周面の外側に位置するまで垂直部とし、その後前記既設鉄塔の外側で、各主柱材の間隔が次第に小さくなるように傾斜させて建設するため、既設鉄塔の腹材等の部材と新設鉄塔の部材との接触のおそれを、ごく限られた主柱材の垂直部内に限定し、これにより迅速にかつ容易に建替施工ができるものである。従って、短期間での施工が可能となる。 According to invention of Claims 1-3, the leg part which stands up from the foundation of the main pillar material of the newly installed tower is provided substantially vertically, and the horizontal passing between the adjacent main pillar materials of these substantially vertical main pillar materials The vertical portion is made until the material is located outside the outer peripheral surface formed between the adjacent main pillars of the existing steel tower, and then the outside of the existing steel tower is inclined so that the interval between the main pillars gradually decreases. Therefore, the risk of contact between the members of the existing steel tower and the members of the new steel tower is limited to the limited vertical part of the main pillar material, which enables quick and easy rebuilding. It can be done. Therefore, construction in a short period is possible.
また、請求項２の発明によれば、既設鉄塔を、新設鉄塔の建替途中で撤去するため、効率よく建替えを行うことができ、施工の短期間化をより確実なものにする。 Further, according to the invention of claim 2, since the existing steel tower is removed during the reconstruction of the new steel tower, it can be efficiently reconstructed, and the construction period can be shortened more reliably.
また、請求項３の発明によれば、既設鉄塔の各脚部の主柱材を渡している腹材を付け替えて、既設鉄塔の脚部の、隣接する各主柱材間に開口部を設けるように改造したため、既設鉄塔の腹材等の部材と新設鉄塔の部材との接触をより確実に回避でき、また、既設鉄塔内への出入りスペースが確保でき、杭施工、鉄塔の資材や機材の搬入、搬出等、狭隘工事箇所での作業が可能となる。 According to the invention of claim 3, the bellows passing the main pillar material of each leg of the existing steel tower is replaced, and an opening is provided between each adjacent main pillar material of the leg of the existing steel tower. As a result, the contact between the members of the existing steel tower and the members of the new steel tower can be avoided more reliably, and the access to the existing steel tower can be secured. Work at narrow construction sites such as loading and unloading becomes possible.
この発明は、複数の送電線支持体を有する送電線鉄塔の建替工法において、既設鉄塔の基礎間に新設鉄塔の基礎を夫々配設し、前記既設鉄塔に対して新設鉄塔が、平面視略４５°方向を変えて建設し、当該新設鉄塔は、前記各基礎から立設する各主柱材を、これらの主柱材の隣接する主柱材間に渡す水平材が、既設鉄塔の隣接する主柱材間で形成される外周面の外側に位置するまで略垂直に伸ばし、その後、前記既設鉄塔の外側で、各主柱材の間隔が次第に小さくなるように傾斜させて建設し、前記新規鉄塔の建設途中において前記既設鉄塔を撤去する、鉄塔の建替工法とした。 The present invention relates to a rebuilding method for a transmission line tower having a plurality of transmission line supports, wherein the foundations of the new steel towers are respectively disposed between the foundations of the existing steel towers. The new steel tower is constructed by changing the direction of 45 °, and the horizontal material passing between the main pillar materials adjacent to the main pillar materials is adjacent to the existing steel tower. Extending substantially vertically until it is located outside the outer peripheral surface formed between the main pillars, and then, in the outside of the existing steel tower, constructed by inclining so that the interval between the main pillars becomes gradually smaller, the new The steel tower was reconstructed by removing the existing steel tower during the construction of the steel tower.
これにより、既設鉄塔の用地内で、迅速にかつ容易に建替施工ができる。 Thereby, rebuilding can be performed quickly and easily within the site of the existing steel tower.
以下、この発明の実施例１を図に基づいて説明する。図１はこの発明の新設鉄塔と既設鉄塔の構成を示す正面図、図２は既設鉄塔と新設鉄塔の基礎部分を示す平面図、図３は既設鉄塔を正面にして新設鉄塔の垂直部を示す説明側面図、図４は新設鉄塔の垂直部と既設鉄塔の脚部を示す説明斜視図、図５は新設鉄塔と既設鉄塔の複数の異なる箇所における主柱材及び水平材の位置関係を示す説明断面図である。 Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the construction of the new tower and the existing tower according to the present invention, FIG. 2 is a plan view showing the foundation of the existing tower and the new tower, and FIG. 3 shows the vertical part of the new tower with the existing tower in front. FIG. 4 is an explanatory perspective view showing the vertical part of the new tower and the legs of the existing tower, and FIG. 5 is an explanation showing the positional relationship between the main pillar material and the horizontal material at a plurality of different locations on the new tower and the existing tower. It is sectional drawing.
図１に示すように、新設鉄塔Ｔは、既設鉄塔ｔを被うように建てられる。しかしながら、新設鉄塔Ｔの４個の各基礎１は、図２に示すように、既設鉄塔ｔの４個の基礎１０１の間であって、平面視４５度、向きを変えている。また、この建替工事において、新設鉄塔Ｔを建設する時点においては既設鉄塔ｔは撤去せずそのまま残しておき、新設鉄塔Ｔの建設途中で既設鉄塔ｔを撤去する。 As shown in FIG. 1, the new tower T is built so as to cover the existing tower t. However, as shown in FIG. 2, the four foundations 1 of the new steel tower T are located between the four foundations 101 of the existing steel tower t and are turned 45 degrees in plan view. In this rebuilding work, when the new tower T is constructed, the existing tower t is left without being removed, and the existing tower t is removed during the construction of the new tower T.
新設鉄塔Ｔは、各基礎１から主柱材２を垂直に立てる。そうして、適宜の高さで、隣接する主柱材２間で、複数段に水平材３を渡し強度を保つ。その場合、主柱材２の下部では、図４に示すように、既設鉄塔ｔの主柱材１０２の内側を通っている。そして、各主柱材２を、その上端に主柱材２を重ねて接続していき、隣接する各主柱材２を渡す水平材３が、既設鉄塔ｔの、隣接する主柱材１０２間に形成される外周面の外側に位置するまで垂直に伸ばす。 The new steel tower T stands the main pillar material 2 vertically from each foundation 1. Then, the horizontal member 3 is passed in a plurality of stages between the adjacent main pillar members 2 at an appropriate height to maintain the strength. In that case, as shown in FIG. 4, the lower part of the main pillar 2 passes through the inside of the main pillar 102 of the existing steel tower t. Then, the main column members 2 are connected to each other by overlapping the main column members 2 on the upper ends thereof, and the horizontal members 3 passing the adjacent main column members 2 are connected between the adjacent main column members 102 of the existing tower t. It extends vertically until it is located outside the outer peripheral surface.
そして、図４に示すように、隣接する各主柱材２を渡す水平材３が、既設鉄塔ｔの、隣接する主柱材１０２間に形成される外周面の外側に位置した後、前記既設鉄塔ｔの外側で既設鉄塔ｔを包み込むように、各主柱材２を、各主柱材２が相互に次第に近接するように所定の角度に傾斜させて伸ばしていき、新設鉄塔Ｔを建設する。 And as shown in FIG. 4, after the horizontal member 3 which passes each adjacent main pillar material 2 is located in the outer side of the outer peripheral surface formed between the adjacent main pillar materials 102 of the existing steel tower t, the said existing In order to wrap the existing steel tower t outside the steel tower t, each main pillar material 2 is inclined and extended at a predetermined angle so that the main pillar materials 2 gradually approach each other, and a new steel tower T is constructed. .
この新設鉄塔Ｔの建設途中で、送電線を停電させ、既設鉄塔ｔの複数の送電線支持体１０４に支持された各送電線を、新設鉄塔Ｔの上部に仮取付けする（図示省略）。その後、既設鉄塔ｔを上から順に分解、撤去する。そして、新規鉄塔Ｔが組み立てられた時点で、再び送電を停電させ、新規鉄塔Ｔの正規な送電線支持体４に各送電線を取り付ける（図示省略）。 During the construction of the new steel tower T, the power transmission line is interrupted, and each power transmission line supported by the plurality of power transmission line supports 104 of the existing steel tower t is temporarily attached to the upper part of the new steel tower T (not shown). Thereafter, the existing steel tower t is disassembled and removed sequentially from the top. Then, when the new tower T is assembled, the power transmission is interrupted again, and each transmission line is attached to the regular transmission line support 4 of the new tower T (not shown).
この様にして、既設鉄塔ｔは新規鉄塔Ｔに建替られる。この工法によれば、図１におけるパネルＰ２の箇所では、図５の（ａ）図に示すように、新設鉄塔Ｔの水平材３と、既設鉄塔ｔの水平材１０３は交差、接触するおそれがある。しかしながら、図１のパネルＰ１の箇所、即ち垂直な主柱材２の頂部では、図５の（ｂ）図に示すように、新設鉄塔Ｔの水平材３は既設鉄塔ｔの水平材１０３の外側に位置しており、これらが相互に接触するおそれはない。また、さらに新設鉄塔ＴのパネルＰ１より高い箇所では、常に図５の（ｃ）図に示すように新設鉄塔Ｔの水平材３は既設鉄塔ｔの外側に位置し、これらは相互に接触するおそれはない。 In this way, the existing steel tower t is rebuilt to the new steel tower T. According to this construction method, as shown in FIG. 5 (a), the horizontal member 3 of the new tower T and the horizontal member 103 of the existing tower t may cross and contact at the position of the panel P2 in FIG. is there. However, at the location of the panel P1 in FIG. 1, that is, at the top of the vertical main column member 2, the horizontal member 3 of the new tower T is outside the horizontal member 103 of the existing tower t, as shown in FIG. There is no fear that they are in contact with each other. Further, at a place higher than the panel P1 of the new tower T, the horizontal member 3 of the new tower T is always located outside the existing tower t as shown in FIG. 5 (c), and these are in contact with each other. It is not.
従って、実施例１の建替工法においては、主柱材の垂直部内で、既設鉄塔の部材に接触する恐れがあるが、それも従来例の工法と比べ、きわめて限定された範囲でしかそのおそれはない。新設鉄塔の大部分である、主柱材の垂直部以外の箇所では、既設鉄塔との間にクリアランスを保ち、部材同士が接触する恐れはない。それ故、建替工事が容易で、迅速な施工ができる。 Therefore, in the rebuilding method of Example 1, there is a risk of contact with the members of the existing steel tower in the vertical part of the main column material, but this is also limited to a very limited range compared to the conventional method. It is not. In places other than the vertical part of the main pillar material, which is the majority of the new steel tower, a clearance is maintained between the existing steel tower and there is no fear that members will contact each other. Therefore, rebuilding work is easy and quick construction is possible.
また、図６は、上記実施例１の他の例を示す。既設鉄塔ｔの各脚部の主柱材１０２間に渡している腹材１０５を取り替えて、隣接する各主柱材間に開口部１０６を設けるように改造したものである。これにより、前記垂直な主柱材２間に渡す水平材３と、既設鉄塔ｔの腹材１０５との接触を回避しながら建設することができる。 FIG. 6 shows another example of the first embodiment. The abdomen 105 passing between the main pillars 102 of each leg of the existing tower t is replaced, and the opening 106 is remodeled between the adjacent main pillars. Thereby, it can construct, avoiding the contact with the horizontal material 3 passed between the said perpendicular | vertical main pillar materials 2, and the belly material 105 of the existing steel tower t.
これにより、既設鉄塔の腹材等の部材と新設鉄塔の部材との接触をより確実に回避でき、また、既設鉄塔内への出入りスペースが確保でき、杭施工、鉄塔の資材や機材の搬入、搬出等、狭隘工事箇所での作業が可能となる。 As a result, it is possible to more reliably avoid contact between members of the existing steel tower, such as abdominal materials, and members of the new steel tower.Also, it is possible to secure a space for entering and exiting the existing steel tower. Work at narrow construction sites such as unloading is possible.
なお、上記実施例１では、基礎１から立ち上げる主柱材２を垂直に設けたが、多少内側にすぼまるように傾斜しても良く、また、外側に拡がるように傾斜することもできる。 In the first embodiment, the main column member 2 rising from the foundation 1 is provided vertically. However, the main column member 2 may be inclined so as to be slightly inward, or may be inclined so as to expand outward. .
Ｔ 新設鉄塔
１ 基礎 ２ 主柱材
３ 水平材 ４ 送電線支持体
ｔ 既設鉄塔
１０１ 基礎 １０２ 主柱材
１０３ 水平材 １０４ 送電線支持体
１０５ 腹材 １０６ 空間
T New steel tower
DESCRIPTION OF SYMBOLS 1 Foundation 2 Main pillar material 3 Horizontal material 4 Transmission line support body t Existing steel tower 101 Foundation 102 Main pillar material 103 Horizontal material 104 Transmission line support body 105 Abdominal material 106 Space
Claims (3)
既設鉄塔の基礎間に新設鉄塔の基礎を夫々配設し、前記既設鉄塔に対して新設鉄塔が、平面視略４５°方向を変えて建設し、
当該新設鉄塔は、前記各基礎から立設する各主柱材を、これらの主柱材の隣接する主柱材間に渡す水平材が、既設鉄塔の隣接する主柱材間で形成される外周面の外側に位置するまで略垂直に伸ばし、
その後、前記既設鉄塔の外側で、各主柱材の間隔が次第に小さくなるように傾斜させて建設することを特徴とする、鉄塔の建替工法。 In the rebuilding method of a transmission line tower having a plurality of transmission line supports,
The foundations of the new steel towers are respectively disposed between the foundations of the existing steel towers, and the new steel towers are constructed with the direction of about 45 ° changed in plan view with respect to the existing steel towers.
The new steel tower has an outer periphery in which the horizontal material passing between the main pillar materials adjacent to each of the main pillar materials formed between the foundations is formed between the adjacent main pillar materials of the existing steel tower. Stretch almost vertically until it is outside the surface,
Thereafter, the rebuilding method for the tower is constructed by inclining the outer side of the existing tower so that the interval between the main pillars gradually decreases.
Replacing the bellows passing between the main pillars of each leg of the existing tower, remodeling it to provide openings between adjacent main pillars, and passing the horizontal members between the vertical main pillars The rebuilding method for a steel tower according to claim 1, wherein the steel tower is constructed while avoiding contact with an abdominal material of an existing steel tower.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137633A (en) * | 1995-11-15 | 1997-05-27 | Chubu Electric Power Co Inc | Power-transmission line steel tower reconstruction method |
| JP2003074213A (en) * | 2001-08-30 | 2003-03-12 | Taisei Corp | Construction method for newly constructed tower and modification method for existing tower |
| JP2005330661A (en) * | 2004-05-18 | 2005-12-02 | Takenaka Komuten Co Ltd | High-rise building construction of existing tower equipped with communication apparatus such as antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137633A (en) * | 1995-11-15 | 1997-05-27 | Chubu Electric Power Co Inc | Power-transmission line steel tower reconstruction method |
| JP2003074213A (en) * | 2001-08-30 | 2003-03-12 | Taisei Corp | Construction method for newly constructed tower and modification method for existing tower |
| JP2005330661A (en) * | 2004-05-18 | 2005-12-02 | Takenaka Komuten Co Ltd | High-rise building construction of existing tower equipped with communication apparatus such as antenna |
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