JP2009035884A - Lift-up method for steel tower - Google Patents

Lift-up method for steel tower Download PDF

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JP2009035884A
JP2009035884A JP2007199418A JP2007199418A JP2009035884A JP 2009035884 A JP2009035884 A JP 2009035884A JP 2007199418 A JP2007199418 A JP 2007199418A JP 2007199418 A JP2007199418 A JP 2007199418A JP 2009035884 A JP2009035884 A JP 2009035884A
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tower
lift
steel
steel tower
foundation
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Makoto Arima
誠 有馬
Akira Kubota
晃 久保田
Toshiyuki Takamoto
敏行 高本
Yoshihito Takashima
良仁 高嶋
Haruhiko Matsuura
晴彦 松浦
Takashi Okawa
孝 大川
Hiroyuki Saito
洋之 斎藤
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Tomoe Corp
Tokyo Electric Power Company Holdings Inc
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Tokyo Electric Power Co Inc
Tomoe Corp
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Priority to JP2007199418A priority Critical patent/JP2009035884A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lift-up method for a steel tower, which enables a lift-up device to be surely installed even on a job site disabling the installation of an anchor bolt for the lift-up device because a steel tower building lot is narrow, and which enables the steel tower to be constructed by the lift-up method. <P>SOLUTION: A restraining steel pipe foundation is used for a steel tower foundation section 2; a lower section of a lowermost tower body 1A, which constitutes the lowermost portion of the steel tower 1, is inserted into a restraining steel pipe 3 which constitutes an upper section of a pile, and integrated by infilling concrete 4; a supporting base 10 for supporting a guide tower 21, which is mounted on the upper section of the lowermost tower body 1A, is constituted by bolt-connecting a base end of a supporting beam 12 to a ring plate 11 which is fixed to the lowermost tower body 1A by welding, and having a leading end thereof provided with supporting columns 15 and 16; and foundation reaction of the guide tower is transferred to the steel tower foundation section 2, so that the lift-up device 20 can be installed even on a narrow lot. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、鉄塔のリフトアップ装置によるリフトアップ工法に関するものであり、特に環境調和鉄塔などの鋼管単柱鉄塔を狭隘地などで基礎面が極端に狭い場合に有効に適用される。   The present invention relates to a lift-up method using a lift-up device for a steel tower, and is particularly effectively applied to a steel pipe single-column steel tower such as an environmentally-friendly steel tower when the foundation surface is extremely narrow in a narrow area.

単柱形式の送電用鉄塔の構築には、地上付近で鉄塔を上部から下部へと構築することができるリフトアップ工法が採用されている（例えば特許文献１参照）。   The construction of a single-pillar power transmission tower employs a lift-up method that can construct a steel tower from the top to the bottom near the ground (see, for example, Patent Document 1).

この特許文献１の発明は、既設鉄塔電線下で鉄塔を安全かつ迅速に構築できる構築方法および装置であり、鉄塔基礎面上に所要高さのリフトアップ装置のガイドタワーを立設し、鉄塔基礎柱脚部の周囲の基礎コンクリートにガイドタワーの下部を、アンカーボルトを介して固定し、ガイドタワーの基礎反力（リフトアップ装置作業荷重の反力）を鉄塔基礎部に伝達し流していた。   The invention of this Patent Document 1 is a construction method and apparatus capable of safely and quickly constructing a steel tower under an existing steel tower wire. A guide tower of a lift-up device having a required height is erected on the steel tower foundation surface, The lower part of the guide tower was fixed to the foundation concrete around the column base via anchor bolts, and the foundation reaction force of the guide tower (reaction force of lift-up device work load) was transmitted to the tower foundation.

なお、鉄塔の基礎に関しては、特許文献２に、杭材と鉄塔用脚材とをコンクリート打設により接合して構成される鉄塔基礎において、鉄塔用脚材にコンクリートを支圧するための突出した部材を設け、鉄塔用脚材及び打設コンクリートの周囲を拘束する筒状部材を設け、筒状部材内壁に打設コンクリートと係合する係合部材を形成し、充填コンクリートの拘束を向上させて割裂破壊を抑制することにより、定着耐力を飛躍的に向上させることのできる鉄塔基礎が開示されている。   In addition, regarding the foundation of the steel tower, in Patent Document 2, in the steel tower foundation constructed by joining the pile material and the steel tower leg by concrete casting, a protruding member for supporting concrete on the steel tower foot A cylindrical member that restrains the periphery of the steel tower legs and the cast concrete, and an engagement member that engages the cast concrete is formed on the inner wall of the tubular member, thereby improving the restraint of the filled concrete and splitting. A steel tower foundation that can dramatically improve fixing strength by suppressing breakage is disclosed.

特公平２−１３１１５号公報Japanese Examined Patent Publication No. 2-13115 特開２００４−２８５７３７号公報JP 2004-285737 A

鉄塔を建設する現場が車道と車道に挟まれた中央分離帯等の狭隘地のように、鉄塔基礎を小さくせざるを得ない場合、リフトアップ装置のガイドタワーを鉄塔基礎面にアンカーボルトで固定する従来方式では、アンカーボルトが鉄塔基礎面からはみ出し、リフトアップ装置を固定することができないため、リフトアップ工法では施工を行うことができなかった。   When the site where the steel tower is built is narrow, such as a narrow median between the roadway and the roadway, the tower base must be made smaller. In the conventional method, the anchor bolt protrudes from the steel tower base surface and the lift-up device cannot be fixed, so that the lift-up method cannot be used for construction.

本発明は、前述のような課題の解決を図ったものであり、鉄塔建設の用地が狭くリフトアップ装置用のアンカーボルトを設置できない現場においても、リフトアップ装置を確実に設置することができ、鉄塔をリフトアップ工法により建設することができる鉄塔のリフトアップ工法を提供することを目的としている。   The present invention is intended to solve the problems as described above, and the lift-up device can be reliably installed even in a site where the site of the steel tower construction is narrow and the anchor bolt for the lift-up device cannot be installed. It aims at providing the lift-up method of the steel tower which can construct a steel tower by the lift-up method.

本発明の請求項１に係る発明は、鉄塔基礎面の上に配置したリフトアップ装置により塔体をリフトアップさせて鉄塔を地上付近において上部から下部へと構築する鉄塔のリフトアップ工法において、鉄塔基礎部から地上に突出する鉄塔の最下部塔体を設置し、この最下部塔体の上部にリフトアップ装置のガイドタワーを支持する支持架台を取り付け、ガイドタワー内への単位塔体の搬入と、ガイドタワー内の単位塔体のリフトアップ機構によるリフトアップとを順次繰り返して、鉄塔を最下部塔体の上方で上部から下部へと構築することを特徴とする鉄塔のリフトアップ工法である。   The invention according to claim 1 of the present invention relates to a lift-up method for a steel tower in which the tower body is lifted up by a lift-up device arranged on the base surface of the steel tower to construct the steel tower from the upper part to the lower part near the ground. The lowermost tower of the steel tower that protrudes from the foundation to the ground is installed, and a support frame that supports the guide tower of the lift-up device is attached to the upper part of the lowermost tower, and the unit tower is carried into the guide tower. The tower tower lift-up method is characterized in that the tower is constructed from the upper part to the lower part above the lowermost tower body by sequentially repeating the lift-up by the lift-up mechanism of the unit tower body in the guide tower.

本発明は、狭隘地現場あるいは最近採用実績の多い拘束鋼管基礎の鉄塔でもリフトアップ工法を可能とするものである。図１、２に例示されるように、支持架台は、最下部塔体の上部にリングプレートを溶接等で固定し、このリングプレートから放射状に延びる支持梁の基端部をリングプレートにボルト等で接合して構成するのが好ましい。各支持梁の先端部同士は連結部材で連結して一体化し、各支持梁の先端部に設けた支持柱にガイドタワーの各柱部材をフランジ・ボルト接合する。   The present invention enables the lift-up method even in confined areas or on steel towers with confined steel pipe foundations that have recently been employed. As illustrated in FIGS. 1 and 2, the support frame has a ring plate fixed to the upper part of the lowermost tower body by welding or the like, and the base end portion of the support beam extending radially from the ring plate is bolted to the ring plate or the like. It is preferable to join them together. The tip portions of the support beams are connected and integrated by a connecting member, and the pillar members of the guide tower are flange-bolt joined to the support columns provided at the tip portions of the support beams.

リフトアップ装置のリフトアップ機構は、例えば塔体を抱持した上下ガイドリングを油圧ジャッキで尺取り式にリフトアップさせる機構など、種々の形式の装置を用いることができ、ガイドタワー内に搬入した上位の単位塔体をリフトアップし、その下に下段の単位塔体を搬入して接続した後、リフトアップする作業を順次繰り返して、鉄塔を地上付近において上部から下部へと構築する。最下部塔体から上の塔体が組み上がると、その下端を最下部塔体の上端に接合して鉄塔が完成する。   The lift-up mechanism of the lift-up device can use various types of devices such as a mechanism that lifts up and down the guide ring that holds the tower body with a hydraulic jack, and has been carried into the guide tower. After the upper unit tower is lifted up and the lower unit tower is brought in and connected to the lower unit tower, the lifting operation is sequentially repeated to build the steel tower from the upper part to the lower part near the ground. When the upper tower is assembled from the lowermost tower, the lower end is joined to the upper end of the lowermost tower to complete the steel tower.

本発明では、リフトアップ装置のガイドタワーの基礎反力（リフトアップ装置作業荷重の反力）を、支持架台を介して最下部塔体の塔体基礎部に伝達し流すことができ、従来のアンカーボルトが不要となり、最下部塔体を埋設できるスペースがあればよいため、狭隘地でもリフトアップ工法が可能となる。   In the present invention, the basic reaction force of the guide tower of the lift-up device (reaction force of the lift-up device work load) can be transmitted to the tower base of the lowermost tower body via the support frame, Since there is no need for anchor bolts and there is only a space where the lowermost tower can be embedded, lift-up construction is possible even in confined areas.

本発明の請求項２に係る発明は、請求項１に記載の鉄塔のリフトアップ工法において、鉄塔基礎部は、地盤中に打設された筒状部材内に、最下部塔体の下部を挿入し、コンクリートを充填して構成されていることを特徴とする鉄塔のリフトアップ工法である。   The invention according to claim 2 of the present invention is the tower lift-up method according to claim 1, wherein the bottom of the tower is inserted into the cylindrical member placed in the ground. And it is the lift-up method of the steel tower characterized by being filled with concrete.

図１に例示するように、鉄塔基礎部に拘束鋼管基礎を用いる場合であり、塔体基礎コンクリートに、内周面に係合突起（ずれ止め）の付いた拘束鋼管を巻き付け、その内側に最下部塔体を定着させることにより、コンクリートの拘束を向上させて割裂破壊を防止することができ、定着耐力が飛躍的に向上した鉄塔基礎が得られる。また、拘束鋼管内に最下部塔体を挿入するコンパクトな基礎であり、狭隘地に鉄塔基礎を構築することができる。   As illustrated in FIG. 1, a restraint steel pipe foundation is used for a steel tower foundation, and a restraint steel pipe having an engagement protrusion (slipping prevention) on the inner peripheral surface is wound around the tower foundation concrete, and the innermost part thereof is wound inside. By fixing the lower tower body, it is possible to improve the restraint of the concrete to prevent split fracture and to obtain a steel tower foundation with dramatically improved fixing strength. Moreover, it is a compact foundation in which the lowermost tower body is inserted into the restraint steel pipe, and a steel tower foundation can be constructed in a confined area.

本発明の請求項３に係る発明は、請求項１または請求項２のいずれかに記載の鉄塔のリフトアップ工法において、鉄塔は、既設鉄塔電線下に設置され、上部に腕金が設けられた単柱鉄塔であり、リフトアップ装置の上方で腕金を既設架線と平行となるように塔体に取り付け、塔体のリフトアップ終了後、最下部塔体から上の塔体を９０度水平旋回させて腕金を既設架線に直交させ、鉄塔の構築を完了することを特徴とする鉄塔のリフトアップ工法である。   The invention according to Claim 3 of the present invention is the tower lift-up method according to any one of Claims 1 and 2, wherein the steel tower is installed under the existing steel tower electric wire, and a brace is provided on the upper part. This is a single-pillar steel tower. At the top of the lift-up device, a brace is attached to the tower so that it is parallel to the existing overhead wire. After the tower is lifted up, the upper tower is turned 90 degrees horizontally from the bottom tower. This is a steel tower lift-up method characterized in that the brace is made perpendicular to the existing overhead wire to complete the construction of the steel tower.

既設鉄塔電線下で塔体をリフトアップする場合であり、最下部塔体から上の塔体が組み上がると、塔体を９０度水平旋回させ、腕金が既設架線に直交する塔体をリフトダウンさせ、その下端を最下部塔体の上端に接合して鉄塔が完成する。既設架線に平行な腕金を既設架設間で上昇させることにより、電線活線状態でも鉄塔を組み立てることができ、電力停止期間をできるだけ短くすることができる。   This is the case where the tower is lifted up under the existing steel tower wire. When the upper tower is assembled from the bottom tower, the tower is turned 90 degrees horizontally, and the armature lifts the tower perpendicular to the existing overhead wire. The tower is completed by joining the lower end to the upper end of the lowermost tower. By raising the armature parallel to the existing overhead wire between the existing constructions, the steel tower can be assembled even in a live wire state, and the power stop period can be shortened as much as possible.

（1）鉄塔基礎部の最下部塔体の上部に、リフトアップ装置のガイドタワーを支持する支持架台を取り付けているため、ガイドタワーの基礎反力を、支持架台を介して最下部塔体の塔体基礎部に伝達し流すことができ、従来のアンカーボルトが不要となり、最下部塔体を埋設できるスペースがあればよいため、狭隘地でもリフトアップ工法が可能となる。   (1) Since a support frame that supports the guide tower of the lift-up device is attached to the upper part of the bottom tower of the steel tower foundation, the basic reaction force of the guide tower is transferred to the bottom tower through the support frame. Since it can be transmitted to the tower base and flowed, a conventional anchor bolt is not required, and a space in which the lowermost tower can be embedded is sufficient, a lift-up method can be performed even in a confined area.

(2) 鉄塔基礎部に拘束鋼管基礎を用いることにより、定着耐力が飛躍的に向上した鉄塔基礎が得られ、かつ、拘束鋼管内に最下部塔体を挿入するコンパクトな基礎であり、狭隘地に鉄塔基礎を構築することができると共に狭隘地でのリフトアップ工法が可能となる。   (2) By using a confined steel pipe foundation for the steel tower foundation, a steel tower foundation with significantly improved anchorage strength can be obtained, and it is a compact foundation in which the lowest tower is inserted into the confined steel pipe. In addition, it is possible to construct a steel tower foundation and to lift up in a confined area.

(3) リフトアップ装置の上方で腕金を既設架線と平行となるように塔体に取り付け、塔体のリフトアップ終了後、最下部塔体から上の塔体を９０度水平旋回させて腕金を既設架線に直交させることにより、電線活線状態でも鉄塔を組み立てることができ、電力停止期間をできるだけ短くすることができる。   (3) At the top of the lift-up device, attach a brace to the tower so that it is parallel to the existing overhead line. After the tower is lifted up, turn the upper tower horizontally 90 degrees from the bottom tower to By making gold orthogonal to the existing overhead wire, the steel tower can be assembled even in a live wire state, and the power outage period can be shortened as much as possible.

以下、本発明を図示する実施形態に基づいて説明する。この実施形態は、狭隘地に鋼管単柱鉄塔を組み立てる例である。図１、図２は、本発明のリフトアップ工法に用いるリフトアップ装置の下部と鉄塔基礎部分の一例を示す鉛直断面図、水平断面図である。図３は本発明で用いるリフトアップ装置の一例を示す側面図である。図４、図５は、本発明のリフトアップ工法を工程順に示す鉛直断面図である。   Hereinafter, the present invention will be described based on the illustrated embodiments. This embodiment is an example of assembling a steel pipe single column tower in a narrow area. 1 and 2 are a vertical sectional view and a horizontal sectional view showing an example of a lower part of a lift-up device used in the lift-up method of the present invention and a steel tower foundation part. FIG. 3 is a side view showing an example of a lift-up device used in the present invention. 4 and 5 are vertical sectional views showing the lift-up method of the present invention in the order of steps.

図１において、環境調和鉄塔等の鋼管単柱鉄塔１が設置される場所は、車道Ａと車道Ａで挟まれた中央分離帯Ｂ等の狭隘地であり、鉄塔基礎面ＧＬが極端に狭い。そのため、リフトアップ装置２０のガイドタワー２１を固定する場合、従来のアンカーボルト方式では車道にアンカーボルトがはみ出してしまうため使用不可能となる。   In FIG. 1, the place where the steel pipe single column tower 1 such as an environmental harmony tower is installed is a narrow area such as a central separation zone B sandwiched between the roadway A and the roadway A, and the steel tower base plane GL is extremely narrow. Therefore, when the guide tower 21 of the lift-up device 20 is fixed, the conventional anchor bolt system cannot be used because the anchor bolt protrudes from the roadway.

そこで、本発明では、鉄塔基礎部２に拘束鋼管基礎を用い、杭の上部を構成する拘束鋼管３内に、鉄塔１の最下部を構成する最下部塔体１Ａの下部を挿入し、コンクリート４を充填して一体化する。この最下部塔体１Ａの上部にガイドタワー２１を支持する支持架台１０を地面すなわち鉄塔基礎面ＧＬから所定の距離をおいて浮いた状態で取り付け、狭隘地でもリフトアップ装置２０を設置できるようにする。   Therefore, in the present invention, a constrained steel pipe foundation is used for the steel tower foundation 2, and the lower part of the lowermost tower body 1A constituting the lowermost part of the steel tower 1 is inserted into the constraining steel pipe 3 constituting the upper part of the pile, and the concrete 4 To be integrated. A support frame 10 that supports the guide tower 21 is attached to the upper part of the lowermost tower 1A so as to float at a predetermined distance from the ground, that is, the steel tower foundation surface GL, so that the lift-up device 20 can be installed even in a narrow area. To do.

図１に示すように、拘束鋼管３は地盤中に埋没状態で打設され、その内周面にはコンクリート４と係合する係合突起５が多数設けられ、最下部塔体１Ａの下部外周面にはコンクリート４を支圧する多数の突起による支圧部材６が設けられている。塔体基礎コンクリートに、係合突起５の付いた拘束鋼管３を巻き付け、その内側に最下部塔体１Ａを定着させることにより、コンクリート４の拘束を向上させて割裂破壊を防止することができ、定着耐力が飛躍的に向上した鉄塔基礎が得られる。また、拘束鋼管３内に最下部塔体１Ａを挿入するコンパクトな基礎であり、狭隘地に鉄塔基礎を構築することができる。なお、最下部塔体１Ａは、図１に二点鎖線で示すように防食コンクリート４０で最終的に覆われる。   As shown in FIG. 1, the constrained steel pipe 3 is placed in a buried state in the ground, and a large number of engaging projections 5 that engage with the concrete 4 are provided on the inner peripheral surface thereof, and the lower outer periphery of the lowermost tower body 1A. The surface is provided with a supporting member 6 by a number of protrusions that support the concrete 4. By winding the restraint steel pipe 3 with the engagement protrusion 5 around the tower foundation concrete, and fixing the lowermost tower body 1A inside thereof, the restraint of the concrete 4 can be improved and split fracture can be prevented. A steel tower foundation with significantly improved fixing strength can be obtained. Moreover, it is the compact foundation which inserts the lowermost tower body 1A in the restraint steel pipe 3, and a steel tower foundation can be constructed in a narrow area. The lowermost tower 1A is finally covered with anticorrosive concrete 40 as shown by a two-dot chain line in FIG.

図１、図２に示すように、支持架台１０は、最下部塔体１Ａを取り囲む形状で塔体１Ａに溶接等で固定されるリングプレート１１と、このリングプレート１１から外側に向かって水平に放射状に伸びる複数本（図示例では４本）の支持梁１２と、この支持梁１２の先端部同士を連結する連結部材１３から構成されている。   As shown in FIGS. 1 and 2, the support frame 10 includes a ring plate 11 that is fixed to the tower body 1 </ b> A by welding or the like in a shape that surrounds the lowermost tower body 1 </ b> A, and horizontally extends outward from the ring plate 11. A plurality of (four in the illustrated example) radially extending support beams 12 and a connecting member 13 that connects the tip portions of the support beams 12 are configured.

リングプレート１１は、上下に間隔をおいて水平に配置された上下二枚の円環プレート１１ａ、１１ａから構成され、その内周面がそれぞれ最下部塔体１Ａの外周面に溶接等で固定される。支持梁１２は、Ｈ形鋼が用いられ、その上下フランジ１２ａ、１２ａがそれぞれ円環プレート１１ａ、１１ａに継手板１４介してボルト接合される。   The ring plate 11 is composed of two upper and lower annular plates 11a, 11a arranged horizontally with an interval in the vertical direction, and the inner peripheral surface thereof is fixed to the outer peripheral surface of the lowermost tower 1A by welding or the like. The The support beam 12 is made of H-shaped steel, and the upper and lower flanges 12a and 12a thereof are bolted to the annular plates 11a and 11a via joint plates 14, respectively.

支持梁１２の先端部には、ガイドタワー２１の柱部材２２の下端部が接続される支持柱１５が設けられている。図示例では、支持梁１２の先端部の上フランジ１２ａの上に置き台として短尺の支持柱１６が設けられ、その上フランジ１６ａに柱部材２２の下端フランジ２２ａがボルト接合される。この支持部における上下フランジ１２ａ、上フランジ１６ａ、下端フランジ２２ａは、縦リブ１７、三角スチフナー１８で補強されている。   A support column 15 to which the lower end portion of the column member 22 of the guide tower 21 is connected is provided at the distal end portion of the support beam 12. In the illustrated example, a short support column 16 is provided as a pedestal on the upper flange 12a of the distal end portion of the support beam 12, and a lower end flange 22a of a column member 22 is bolted to the upper flange 16a. The upper and lower flanges 12 a, the upper flange 16 a, and the lower end flange 22 a in the support portion are reinforced with vertical ribs 17 and triangular stiffeners 18.

連結部材１３は、Ｉ形鋼が用いられ、その上下フランジ１３ａ、１３ａがそれぞれ支持梁１２の先端部の上下フランジ１２ａ、１２ａに継手板１９を介してボルト接合される。図示例では、４本の片持ち梁の支持梁１２が４本の連結部材１３で一体化し、ガイドタワー２１の水平断面形状に対応した平面視で四角形状の支持架台１０が形成される。   The connecting member 13 is made of I-shaped steel, and the upper and lower flanges 13 a and 13 a are bolted to the upper and lower flanges 12 a and 12 a at the tip of the support beam 12 via a joint plate 19. In the illustrated example, four cantilevered support beams 12 are integrated by four connecting members 13, and a rectangular support frame 10 is formed in plan view corresponding to the horizontal sectional shape of the guide tower 21.

なお、図１に示す鉄塔は、全ての単位塔体のリフトアップが終了した状態であり、一番下の単位塔体１ＵＮの下端を最下部塔体１Ａの上端に接合し、仮設のエレクションピース５０とボルト５１で建て入れ調整を行う。調整後、エレクションピース５０を取り外し、溶接等で本接合する。 Note that tower shown in FIG. 1 is a state where the lift-up has been completed for all the unit tower body, the lower end of the unit tower body 1U N bottom joined to the upper end of the bottom tower body 1A, the temporary Election The adjustment is made with the piece 50 and the bolt 51. After the adjustment, the erection piece 50 is removed and main joining is performed by welding or the like.

リフトアップ装置２０は、例えば図３に示す装置を用いることができる。このリフトアップ装置２０は、柱部材２２を水平部材２３やブレース材２４で連結して構成されるガイドタワー２１と、各柱部材２２の内側に沿って配置されたガイドレール等を案内として上下移動自在に支持され、かつ、単位塔体１Ｕを抱持し得る上部ガイドリング２５・下部ガイドリング２６と、このガイドリング２５と２６とを連結する吊りビーム２７と、水平部材２３に設置されて吊りビーム２７を上下移動させ得る油圧ジャッキ２８等から構成されている。   As the lift-up device 20, for example, the device shown in FIG. 3 can be used. The lift-up device 20 moves up and down using a guide tower 21 configured by connecting the column member 22 with a horizontal member 23 or a brace material 24, and a guide rail disposed along the inside of each column member 22 as a guide. The upper guide ring 25 and the lower guide ring 26 that are freely supported and can hold the unit tower 1U, the suspension beam 27 that connects the guide rings 25 and 26, and the horizontal member 23 are suspended. It comprises a hydraulic jack 28 or the like that can move the beam 27 up and down.

上下ガイドリング２５・２６は二つに分割され、ガイドタワー２１内に搬入された単位塔体１Ｕに各分割体を取り囲むように配置して単位塔体１Ｕを抱持し、固定手段により単位塔体１Ｕと上下ガイドリング２５・２６を固定する。上下ガイドリング２５・２６の外周部にはガイドローラ等が設けられている。吊りビーム２７の下端は下部ガイドリング２６に接続され、吊りビーム２７の上部を油圧ジャッキ２８で引き上げることにより、抱持した単位塔体１Ｕをリフトアップさせることができる。   The upper and lower guide rings 25 and 26 are divided into two parts, arranged so as to surround each divided body in the unit tower body 1U carried into the guide tower 21, and hold the unit tower body 1U. The body 1U and the upper and lower guide rings 25 and 26 are fixed. Guide rollers and the like are provided on the outer peripheral portions of the upper and lower guide rings 25 and 26. The lower end of the suspension beam 27 is connected to the lower guide ring 26, and the held unit tower 1 </ b> U can be lifted up by pulling up the upper portion of the suspension beam 27 with the hydraulic jack 28.

吊りビーム２７の引き上げは、例えば吊りビーム２７に長手方向に所定のピッチで形成された挿入孔と、油圧ジャッキ２８の上下にそれぞれ設けられたロッキングピンで尺取り方式で行われる。上部ロッキングピンを挿入孔に挿入し、油圧ジャッキを伸長させて、吊りビームを上昇させ、下部ロッキングを挿入孔に挿入して、油圧ジャッキを収縮させ、この動作を繰り返すことにより、吊りビーム２７・上下ガイドリング２５・２６を尺取り方式で上昇させることができる。   The lifting beam 27 is pulled up by, for example, a measuring method using insertion holes formed in the hanging beam 27 at a predetermined pitch in the longitudinal direction and locking pins provided above and below the hydraulic jack 28, respectively. By inserting the upper locking pin into the insertion hole, extending the hydraulic jack, raising the suspension beam, inserting the lower locking into the insertion hole, contracting the hydraulic jack, and repeating this operation, the suspension beam 27. The upper and lower guide rings 25 and 26 can be raised by a measuring method.

また、ガイドタワー２１の下部には、最下部塔体１Ａの上端を挟むように、かつ、内部から側方に延出するように一対の搬入レール３０が設置されており、この搬入レール３０上に塔体搬入台車３１が配置される。図１に示す中央分離帯Ｂの場合、この中央分離帯Ｂ上に搬入レール３０・塔体搬入台車３１を設置することができる。   In addition, a pair of carry-in rails 30 are installed at the lower part of the guide tower 21 so as to sandwich the upper end of the lowermost tower body 1A and extend laterally from the inside. A tower carrying truck 31 is arranged in the middle. In the case of the median strip B shown in FIG. 1, the carry-in rail 30 and the tower-carriage carriage 31 can be installed on the median strip B.

以上のような構成において、次のような手順で鉄塔のリフトアップ施工が行われる（図４、図５参照）。なお、この施工例は既設鉄塔電線下に鉄塔を構築する場合である。   In the above configuration, the tower is lifted up in the following procedure (see FIGS. 4 and 5). In addition, this construction example is a case where a steel tower is constructed under the existing steel tower electric wire.

（1）工程１：中央分離帯Ｂの地盤中に埋設した拘束鋼管３内に鉄塔の最下部塔体１Ａの下部を挿入し、コンクリート４を充填して、鉄塔基礎部２を形成する。   (1) Step 1: The lower part of the lowermost tower 1A of the steel tower is inserted into the constrained steel pipe 3 embedded in the ground of the median strip B, and the concrete 4 is filled to form the steel tower base 2.

（2）工程２：最下部塔体１Ａの上部に支持架台１０を地面すなわち鉄塔基礎面ＧＬから所定の距離をおいて浮いた状態で取り付ける。   (2) Step 2: The support frame 10 is attached to the upper part of the lowermost tower body 1A in a floating state with a predetermined distance from the ground, that is, the tower base surface GL.

（3）工程３：支持架台１０の上にリフトアップ装置２０のガイドタワー２１の大部分をクレーンで組み立てる。ガイドタワー２１には、上部ガイドリング２５、下部ガイドリング２６、吊りビーム２７、油圧ジャッキ２８、搬入レール３０・塔体搬入台車３１などを設置する。   (3) Step 3: Most of the guide tower 21 of the lift-up device 20 is assembled on the support frame 10 with a crane. In the guide tower 21, an upper guide ring 25, a lower guide ring 26, a suspension beam 27, a hydraulic jack 28, a carry-in rail 30, a tower carrying cart 31, and the like are installed.

（4）工程４：鉄塔の上部を構成する単位塔体の第１節１Ｕ１〜第３節１Ｕ３をガイドタワー２１内にクレーンで吊り込んで組み立てる。 (4) Step 4: The first section 1U 1 to the third section 1U 3 of the unit tower constituting the upper part of the steel tower are suspended and assembled in the guide tower 21 with a crane.

（5）工程５：ガイドタワー２１の残りの上部を組み立てる。第１節１Ｕ１〜第３節１Ｕ３には、上下ガイドリング２５・２６が固定されており、この状態から油圧ジャッキ２８を作動させて上下ガイドリング２５・２６及び第１節１Ｕ１〜第３節１Ｕ３を尺取り方式で上昇させる。 (5) Step 5: Assemble the remaining upper part of the guide tower 21. Upper and lower guide rings 25 and 26 are fixed to the first section 1U 1 to the third section 1U 3 , and the hydraulic jack 28 is operated from this state to operate the upper and lower guide rings 25 and 26 and the first section 1U 1 to the first section 1U 1 to the first section 1U 3 . Raise 3 verses 1U 3 by a measuring method.

（6）工程６：最下部塔体１Ａと第３節１Ｕ３との間に、次の第４節１Ｕ４を挿入できる空間が形成されるまでリフトアップを続ける。リフトアップ終了後、油圧ジャッキ２８は上段の水平部材２３へ盛り替える。次いで、塔体搬入台車３１に載せた第４節１Ｕ４を第３節１Ｕ３の下に搬入する。 (6) Step 6: The lift-up is continued until a space in which the next fourth section 1U 4 can be inserted is formed between the lowermost tower 1A and the third section 1U 3 . After the lift-up is completed, the hydraulic jack 28 is replaced with the upper horizontal member 23. Next, the fourth section 1U 4 placed on the tower body carrying carriage 31 is carried under the third section 1U 3 .

（7）工程７：第１節１Ｕ１〜第３節１Ｕ３をリフトダウンさせ、第４節１Ｕ４と接合する。塔体１Ｕには、予め腕金取付部７が設けられており、ガイドタワー２１の上部において腕金８を取り付ける。腕金８は、中央分離帯Ｂの長手方向すなわち既設架線の方向と平行となるように取り付ける。 (7) Step 7: The first knot 1U 1 to the third knot 1U 3 are lifted down and joined to the fourth knot 1U 4 . The armature mounting portion 7 is provided in advance in the tower body 1U, and the armrest 8 is attached to the upper portion of the guide tower 21. The brace 8 is attached so as to be parallel to the longitudinal direction of the central separation band B, that is, the direction of the existing overhead wire.

（8）工程８：油圧ジャッキ２８は下段の水平部材２３へ盛り替える。上記の単位塔体１Ｕのリフトアップ、次の単位塔体１Ｕの搬入・接続等の作業を順次繰り返し、鉄塔１を上部から下部へと組み上げる。リフトアップ完了後、鉄塔１の上部には既設架線と平行に腕金８が配設されており、塔体搬入台車３１上の塔体全体を水平に９０度旋回させて腕金８を既設架線と直交するようにし、既設架線を取り付けることができるようにする。   (8) Step 8: The hydraulic jack 28 is replaced with the lower horizontal member 23. The above-described operations such as lifting up the unit tower 1U and carrying in / connecting the next unit tower 1U are sequentially repeated to assemble the steel tower 1 from the upper part to the lower part. After the lift-up is completed, the arm bracket 8 is disposed in the upper part of the steel tower 1 in parallel with the existing overhead wire. The entire tower body on the tower carrying cart 31 is turned 90 degrees horizontally to move the arm bracket 8 to the existing overhead wire. So that the existing overhead wire can be attached.

（9）工程９：塔体搬入台車３１を側方へ搬出し、塔体全体をリフトダウンさせ、最下部塔体１Ａと接合し、建て入れ調整を行った後、本接合する。   (9) Step 9: The tower body carrying truck 31 is carried out to the side, the entire tower body is lifted down, joined to the lowermost tower body 1A, and after the adjustment of the building, the main joining is performed.

（10）工程１０：リフトアップ装置１０を撤去して、鉄塔１が完成する。   (10) Step 10: The lift-up device 10 is removed and the tower 1 is completed.

なお、本発明は、図示例に限定されないことはいうまでもない。   Needless to say, the present invention is not limited to the illustrated examples.

本発明のリフトアップ工法に用いるリフトアップ装置の下部と鉄塔基礎部分の一例を示す鉛直断面図である。It is a vertical sectional view which shows an example of the lower part of a lift-up apparatus used for the lift-up method of this invention, and a steel tower foundation part. 図１の水平断面図である。It is a horizontal sectional view of FIG. 本発明で用いるリフトアップ装置の一例を示す側面図である。It is a side view which shows an example of the lift-up apparatus used by this invention. 本発明のリフトアップ工法を工程順に示す鉛直断面図（工程１〜６）である。It is a vertical sectional view (process 1-6) which shows the lift up construction method of the present invention in order of a process. 本発明のリフトアップ工法を工程順に示す鉛直断面図（工程７〜10）である。It is the vertical sectional view (process 7-10) which shows the lift up construction method of the present invention in order of a process.

符号の説明Explanation of symbols

Ａ…車道
Ｂ…中央分離帯（狭隘地）
１…鉄塔
１Ａ…最下部塔体
１Ｕ…単位塔体
２…鉄塔基礎部
３…拘束鋼管
４…コンクリート
５…係合突起
６…支圧部材
７…腕金取付部
８…腕金
１０…支持架台
１１…リングプレート
１１ａ…円環プレート
１２…支持梁
１２ａ…フランジ
１３…連結部材
１３ａ…フランジ
１４…継手板
１５…支持柱
１６…支持柱
１７…縦リブ
１８…三角スチフナー
１９…継手板
２０…リフトアップ装置
２１…ガイドタワー
２２…柱部材
２３…水平部材
２４…ブレース材
２５…上部ガイドリング
２６…下部ガイドリング
２７…吊りビーム
２８…油圧ジャッキ
３０…搬入レール
３１…塔体搬入台車
４０…防食コンクリート
５０…エレクションピース
５１…ボルト A ... Roadway B ... Median strip (narrow area)
DESCRIPTION OF SYMBOLS 1 ... Steel tower 1A ... Lowermost tower body 1U ... Unit tower body 2 ... Steel tower base part 3 ... Restraint steel pipe 4 ... Concrete 5 ... Engagement protrusion 6 ... Supporting member 7 ... Arm metal mounting part 8 ... Arm metal 10 ... Support stand DESCRIPTION OF SYMBOLS 11 ... Ring plate 11a ... Ring plate 12 ... Support beam 12a ... Flange 13 ... Connecting member 13a ... Flange 14 ... Joint plate 15 ... Support column 16 ... Support column 17 ... Vertical rib 18 ... Triangular stiffener 19 ... Joint plate 20 ... Lift UP device 21 ... guide tower 22 ... column member 23 ... horizontal member 24 ... brace material 25 ... upper guide ring 26 ... lower guide ring 27 ... hanging beam 28 ... hydraulic jack 30 ... loading rail 31 ... tower loading cart 40 ... anticorrosive concrete 50 ... Erection piece 51 ... Bolt

Claims (3)

鉄塔基礎面の上に配置したリフトアップ装置により塔体をリフトアップさせて鉄塔を地上付近において上部から下部へと構築する鉄塔のリフトアップ工法において、
鉄塔基礎部から地上に突出する鉄塔の最下部塔体を設置し、この最下部塔体の上部にリフトアップ装置のガイドタワーを支持する支持架台を取り付け、ガイドタワー内への単位塔体の搬入と、ガイドタワー内の単位塔体のリフトアップ機構によるリフトアップとを順次繰り返して、鉄塔を最下部塔体の上方で上部から下部へと構築することを特徴とする鉄塔のリフトアップ工法。 In the lift-up method of the steel tower, where the tower is lifted up by a lift-up device placed on the steel tower foundation surface, and the steel tower is constructed from the top to the bottom near the ground.
The bottom tower of the steel tower that protrudes from the tower base to the ground is installed, and the support tower that supports the guide tower of the lift-up device is attached to the top of this bottom tower, and the unit tower is carried into the guide tower And a tower tower lift-up method in which the tower is constructed from the upper part to the lower part above the lowest tower body by sequentially repeating the lift-up by the lift-up mechanism of the unit tower in the guide tower. 請求項１に記載の鉄塔のリフトアップ工法において、鉄塔基礎部は、地盤中に打設された筒状部材内に、最下部塔体の下部を挿入し、コンクリートを充填して構成されていることを特徴とする鉄塔のリフトアップ工法。   In the lift-up method of the steel tower according to claim 1, the steel tower foundation is configured by inserting the lower part of the lowermost tower body into a cylindrical member placed in the ground and filling with concrete. This is a steel tower lift-up method. 請求項１または請求項２のいずれかに記載の鉄塔のリフトアップ工法において、鉄塔は、既設鉄塔電線下に設置され、上部に腕金が設けられた単柱鉄塔であり、リフトアップ装置の上方で腕金を既設架線と平行となるように塔体に取り付け、塔体のリフトアップ終了後、最下部塔体から上の塔体を９０度水平旋回させて腕金を既設架線に直交させ、鉄塔の構築を完了することを特徴とする鉄塔のリフトアップ工法。   In the lift-up method of the steel tower in any one of Claim 1 or Claim 2, a steel tower is a single pillar steel tower installed under the existing steel tower electric wire, and was provided with a brace on the upper part. Attach the brace to the tower so that it is parallel to the existing overhead line, and after completing the lift of the tower, turn the upper tower 90 degrees horizontally from the bottom tower to make the brace orthogonal to the existing overhead line, A tower lift-up method characterized by completing the construction of the tower.
JP2007199418A 2007-07-31 2007-07-31 Lift-up method for steel tower Pending JP2009035884A (en)

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