JP3859442B2

JP3859442B2 - Method and apparatus for rebuilding transmission tower

Info

Publication number: JP3859442B2
Application number: JP2000290606A
Authority: JP
Inventors: 重信柿沼; 善正折笠; 志郎鈴木
Original assignee: Tohoku Electric Power Co Inc
Current assignee: Tohoku Electric Power Co Inc
Priority date: 2000-09-25
Filing date: 2000-09-25
Publication date: 2006-12-20
Anticipated expiration: 2020-09-25
Also published as: JP2002097819A

Description

【０００１】
【発明の属する技術分野】
本発明は送電鉄塔の建替え方法および装置に関する。
【０００２】
【従来の技術】
送電鉄塔は一般に基礎上に形鋼材からなる支柱を組み付け連結し、支柱間にブレース類を連結して構成されている。
かかる送電鉄塔は、建設されてから長年月を経ると、周辺に高架構造物や高層建造物が出現することなどにより電線地上高の不足が生ずる。
この対策としては、既設の送電鉄塔を解体しその敷地に新たな送電鉄塔を建設することが考えられる。しかし、送電鉄塔の周辺は年月の経過とともに開発が進んで人家が密集していることが多く、この場合、スペースの狭い用地で新たに鉄鋼材を組み付け、しかもそれを活線条件下で実施することは不可能に近く、多大の時間と費用さらには周辺住民の活動の制限が不可避的である。このため、鉄塔建替えが必要とされながらその実施が遅れていたものである。
【０００３】
【発明が解決しようとする課題】
本発明は前記問題点を解決するためになされたもので、その目的とするところは、既設送電鉄塔内用地内でしかも既設鉄塔に荷重を掛けず、活線状態のまま高い鉄塔を簡易かつ安全に構築することができる市街地における元位置鉄塔建替えに好適な鉄塔組立て方法を提供することにある。
また、本発明の他の目的は、前記方法の実施に好適な鉄塔組立て装置を提供することにある。
【０００４】
【課題を解決するための手段】
上記目的を達成するため、第１発明は、既設送電鉄塔内で鋼管単体鉄塔を次の工程で構築することを特徴としている。
１）既設送電鉄塔の所要側面を開放するとともに頂部を切除し、既設送電鉄塔内に塔体基礎を構築するとともに、この塔体基礎の周りに、既設鉄塔の開口部と同じ側面に鉄塔部材の搬入に適する開口を有し内側複数箇所にガイドレールを縦設した枠状の架台を据付け、架台内には、前記ガイドレールに沿って移動する転輪を外側に有し、内側には各鉄塔部材の円周上数か所に対する複数の吊りアームを有する昇降自在なせり上げ用搬器を配し、架台の頂部には上位側の鉄塔部材を一時的に支えるための支持手段を設け、該支持手段よりも上方に上位側の鉄塔部材を半径方向から保持するガイドサポート手段を設け、
２）既設送電鉄塔の外部には鋼管を単位長さに分割した鉄塔部材を準備し、
３）既設送電鉄塔の開放側面と前記架台の側面の開口を通して最上位の鉄塔部材を搬入し、これを前記せり上げ用搬器の吊りアームと連結しせり上げ用搬器により既設送電鉄塔内で所要高までせり上げ、
４）次位の鉄塔部材を既設送電鉄塔の開放側面と前記架台の側面の開口を通して搬入して前記鉄塔部材と接続し、せり上げ用搬器３の吊りアームを最上位の鉄塔部材と離間してせり上げ用搬器を降下させる間、上位側の鉄塔部材を前記支持手段で一時的に支え、せり上げ用搬器の吊りアームを次位の鉄塔部材と連結し、ガイドサポート手段で上位側の鉄塔部材が垂直状に保たれつつ上昇されるように半径方向から保持しながらせり上げ用搬器により全体をせり上げ、
５）さらに次位の鉄塔部材に開放側面から搬入した下位の鉄塔部材を接続して前記工程によりせり上げ、かかる工程を既設送電鉄塔から上位側の鉄塔部材が所要長さ突出するまで繰り返し、最下位の鉄塔部材を塔体基礎に連結して鋼管単体鉄塔を構築する。
【０００５】
第２発明は、既設送電鉄塔内の基礎上に据え付けられた枠状の架台と、前記架台内に配された昇降自在なせり上げ用搬器と、前記架台の頂部に設けられ、せり上げた鉄塔部材に接続した下位の鉄塔部材をせり上げ用搬器の吊りアームと連結して吊り上げるべくせり上げ用搬器が降下している間、上位側の鉄塔部材を一時的に支える支持手段と、前記支持手段よりも上方に設けられ、鉄塔部材のせり上げ時に上位側の鉄塔部材が垂直状に保たれつつ上昇されるように半径方向から保持するガイドサポート手段とを備えてなり、
前記架台はベース部、中間架台部，頂部架台部に分割され、ベース部は基礎天端部の周りに接地する脚部を相互につなぐ横梁部を有し、横梁部の内側のリブが前記基礎天端部に設けたリブに連結されることで基礎天端部と一体化されるように構成され、中間架台部と頂部架台部は４隅の柱フレームとこれらを結ぶ横梁材により全体として平面が矩形枠に構成され、既設鉄塔の開口部と同じ側面には鉄塔部材の搬入に適する開口が設けられ、前記４隅の柱フレームには、それぞれガイドレールが縦設されており、
前記せり上げ用搬器は、矩形枠状のフレームを有し、該フレームの各隅の上下端部には前記架台のガイドレールに接する転輪が取り付けられ、また、フレーム内側には、鉄塔部材と半径方向から連結してせり上げ力を伝達するための複数組の吊りアームが設けられており、
前記支持手段は、頂部架台部に据え付けられ内側に鉄塔部材が貫通される空間を形成した矩形状の台枠フレームと、この台枠フレーム内の対偶位置に横置された複数の油圧シリンダと、基端が台枠フレームに枢支され、自由端側に鉄塔部材と接するクランプ部材を首振り可能に連結し、中間が前記油圧シリンダ（に連結されて水平面内で傾動可能な複数のアームを備えており、
ガイドサポート手段は、前記支持手段の台枠フレーム上に下部が固定され、相互の間隔が架台を突出する鉄塔部材の最大径のものが適度のゆとりをもって移動しうる大きさの複数基のガイドレールと、各ガイドレールに沿って昇降可能な複数の台車と、それぞれの台車に装備され鉄塔部材の径の変化に対応可能なように繰出し繰込可能な連結要素とを備えていることを特徴としている。
【０００７】
【発明の実施の形態】
以下本発明の実施例を添付図面を参照して説明する。
図１ないし図１６は本発明による送電鉄塔の組立て方法の一例を示している。
本発明は、まず、既設送電鉄塔内での作業スペースの確保と新設鉄塔用の鉄塔部材の搬入およびせり上げのために前作業を実施する。
すなわち、第１ステップとして、図１のように、上方への新設鉄塔の突出を可能にするために、既設送電鉄塔（以下既設鉄塔と称す）Ａの頂部ａを切断する。そして、既設鉄塔Ａに設備されている地線を移線し、さらに、既設鉄塔Ａの下半部領域の側面に開口部ｂを形成する。しかし、既設鉄塔Ａの腕金はそのままにしており、送電線は活線状態にされる。
【０００８】
次に、第２ステップとして、既設鉄塔Ａの敷地内に基礎工事を行い、新規鉄塔の基礎を構築する。この方法は任意であり、たとえば、既設鉄塔の敷地内を掘削し、基礎体Ｃを前記開口部ｂから搬入して掘削孔に挿入し、鉄筋組をしてコンクリートを打設することで行われる。そして、このときに基礎から多数本の据付け用ボルトｄを突設させておく。
【０００９】
第３ステップとして、新設鉄塔用の基礎天端部（脚部材）１を設けるとともに、その基礎天端部１を取り囲むようにせり上げ装置の架台２を据え付ける。
前記基礎天端部１は、周囲に据付け用ボルトｄを挿通するためのフランジ１００を有し、据付け用ボルトｄの頂部にナットを螺合することにより強固に基礎と一体化される。基礎天端部１は頂部に連結用フランジ１０１を有し、胴部にはたとえば９０度間隔で半径方向に張り出すリブ１０２が設けられている。
【００１０】
せりあげ用の架台２は、既設鉄塔Ａへの搬入搬出と組立てを容易にし、また、既設鉄塔Ａの開口部ｂの大きさを鉄塔の強度に不安を生じさせずに済む必要最少限の大きさにするために、ベース部２Ａ、中間架台部２Ｂ，頂部架台部２Ｃなど複数の部分に分割されている。
【００１１】
ベース部２Ａは、図４と図５のように、基礎天端部１の周りのコンクリート面に接地する４本の脚部２００とそれらを相互につなぐ横梁部２０１を有し、さらに横梁部２０１の内側には前記リブ１０２に対応するリブ２０２が突設されている。
それらリブ１０２，２０２は連結ボルトにより締結され、それによりベース部２Ａと基礎天端部１とが一体化されるので、せりあげ用の架台２は安定した据付け状態とされる。ベース部２Ａの側方にはクライミングウインチＥが据え付けられる。
【００１２】
続いて、図６と図７のように、既設鉄塔Ａの開口部ｂから中間架台部２Ｂおよび頂部架台部２ＣがクレーンＧで順次搬入され、前記ベース部２Ａに据付け連結されることにより、図８と図９に示すように、所要高さのせりあげ用の架台２が組み立てられる。
【００１３】
この架台２内にはせり上げ用搬器３が配され、また、架台２の上部には新設用の鉄塔部材のせり上げ時に、上位側の鉄塔部材を半径方向から一時的に支える支持手段４が据付けられ、その支持手段４の上に、鉄塔部材のせり上げ時に上位側の鉄塔部材が傾斜せず垂直状に保たれるように半径方向から支持・ガイドするガイドサポート手段５が据付け固定される。
そして、せり上げ用搬器３は多連シーブを介して前記クライミングウインチＥに接続される。中間または頂部架台部２Ｂ，２Ｃは適宜控え用のワイヤロープによって既設鉄塔Ａの基部と連結される。
以上で準備が完了する。
【００１４】
新設鉄塔部材は、建設すべき塔高を分割した複数本の単位鋼管からなっている。すなわち、図１０や図１４に示すように、直径がたとえば４００〜１４００ｍｍの範囲で順次変化した所要の単位長さ（たとえば２〜６ｍの範囲）の鋼管が使用される。図１４では、一例として９本の鉄塔部材６ａ〜６ｉが示されており、図１０は最上位から３番目までの鉄塔部材６ａ，６ｂ，６ｃを代表的に示している。各鉄塔部材は、上下端部に接続用のフランジ６０，６１が設けられ、かつ、少なくとも下端付近の周面に穴付きブラケット６２がたとえば９０度間隔で設けられる。また、好適には、前記ガイドサポート手段５との連結のためのブラケット類が配設される。なお、既設鉄塔Ａの頂部ａから突出しあるいは頂部付近に位置することになる鉄塔部材は、その径に応じて現場溶接にて接続されるので、その場合にはフランジは設けられないくてもよい。
【００１５】
ここで、本発明で特徴するせり上げ装置の詳細を説明しておく。図１７ないし図２０はその一実施例を示している。
せりあげ用の架台２の中間架台部２Ｂと頂部架台部２Ｃは、図１７と図１９のように、４隅の柱フレーム２０とこれらを結ぶ横梁材２１を備え、全体として平面が矩形枠を呈するように構成されており、既設鉄塔の開口部ｂと同じ側面には鉄塔部材６ａ〜６ｉの搬入に適する開口２２ｂが設けられている。
また、中間架台部２Ｂと頂部架台部２Ｃの４隅の柱フレーム２０には、それぞれ溝形鋼などからなるガイドレール２３が縦設されている。
【００１６】
せり上げ用搬器３は矩形枠状のフレーム３０を有し、フレーム３０の対向する２面に前記クライミングウインチＥからのせり上げ用ロープｅの端末がシーブを介して連結されており、また、フレーム３０の各隅の上下端部には前記架台２のガイドレール２３に接する転輪３１，３１が取り付けられている。
また、せり上げ用搬器３のフレーム３０内側には、鉄塔部材６ａ〜６ｈと半径方向から連結してせり上げ力を伝達するための複数組の吊りアーム３２が設けられている。
【００１７】
各組の吊りアーム３２は、鉄塔部材６ａ〜６ｈの前記穴付きブラケットとピンないしボルト連結されるヨーク状の連結部を先端に有しているが、鉄塔部材６ａ〜６ｈは前述したように直径が４００〜１２００ｍｍの範囲で変化している。そのため、各組の吊りアーム３２は、図１７のように、基端がフレーム３０にピボット軸３２０にて角度可変に枢支される。
さらに、吊り角度ができるだけ変化しないようにするため、各吊りアーム３２は少なくとも、大径対応用の第１段部３２ａと小径対応用の第２段部３２ｂとを軸によって連結・分離可能につないでいる。
【００１８】
支持手段４は、上位の鉄塔部材と吊りアーム３２との連結が解かれ、せり上げ用搬器３が下降して下位の鉄塔部材を吊りアーム３２と連結するまでの間、１本以上の上位側の鉄塔部材を半径方向からクランプして垂直を保つように支えるためのものであるが、もちろん、垂直荷重を一時的に支える機能も有している。
この支持手段４は、頂部架台部２Ｃに据え付けられ内側に鉄塔部材が貫通される空間を形成した矩形状の台枠フレーム４０と、この台枠フレーム４０内の対偶位置に横置された１対の手動操作型の油圧シリンダたとえばジャッキシリンダ４１，４１と、基端が台フレーム４０に枢支され、自由端側に鉄塔部材と接するクランプ部材４３を首振り可能に連結した１組の水平アーム４２，４２とを備えている。
【００１９】
油圧シリンダ４１，４１のピストンロッドは水平アーム４２，４２の中間部位に連結されている。クランプ部材４３は鉄塔部材との接触面にゴムなどの弾性部材４３０が取り付けられている。
支持手段４は半径方向すなわち既設鉄塔との間にスペースがある場合には、鉄塔部材の軸線と直角状に油圧シリンダを配置し、油圧シリンダのピストンロッド先端にクランプ部材を連結する構成としてもよい。しかし、この構成では大型化を避けられず、既設鉄塔Ａ内への搬出入に難点がある。前記のような構成にした場合には、コンパクトでしかも鉄塔部材の径の変化に自在に対応することができる利点がある。
【００２０】
ガイドサポート手段５は、前記支持手段４の台枠フレーム４０上に４５度角度をずらせるように設けた支持座４５に下部が固定された複数基のガイドレール５０と、各ガイドレール５０に沿って昇降可能な複数の台車５１と、それぞれの台車５１に装備され鉄塔部材の径の変化に対応可能なように繰出し繰込可能（可変長）な連結要素５２とを備えている。
【００２１】
ガイドレール５０は形鋼たとえばＨ形鋼からなっていて、少なくとも９０度間隔で４本配置される。その間隔は架台２を突出する鉄塔部材の最大径のものが適度のゆとりをもって移動しうる大きさとする。ガイドレール５０の高さは適宜設定されるが、好ましくは、既設鉄塔Ａの切断された頂部ａに達するかまたはその近傍に達する寸法を有している。したがって、ガイドレール５０は所定長さに分割されたものを、継手によって連結することにより構成される。
【００２２】
各ガイドレール５０は相互に横連結材５００によって連結されており、各台車５１はガイドレール５０に外れないように接する複数組のコロ５１０を有している。可変長の連結要素５２は、手動ジャッキや入子式のロッドなどでもよいが、この例では台車５１に取り付けられたレバーホイストからなっており、繰出し巻き込みされるチェーン５２０が先端のフックで鉄塔部材のブラケットに連結され、あるいは鉄塔部材の外周に巻回される。
なお、架台２の中間等適所には図１７のように作業用デッキ９が設置される。
【００２３】
次いで、本発明による鉄塔建設の主工程を説明する。
本発明は、基本的には、図１４のように、細径の鉄塔部材（鉄塔最上位となるべき部分）６から相対的に太径の鉄塔部材６ｂ，６ｃ…６ｈを既設鉄塔Ａ内に順次搬入し、上位の鉄塔部材と下位の鉄塔部材とを接続し、せり上げる操作を必要な塔高さになるまで反復し、最下位の太径の鉄塔部材６ｉをそれより上方の一連の頭部体と接続するとともに、前記基礎天端部１と剛結し、図１６に示すような鋼管単体鉄塔Ｔを得るのである。
【００２４】
この工程は図１１ないし図１４に示されている。
詳しく説明すると、基礎天端部１の天頂には側方から内部に手を挿入してボルト締結操作が可能な組立てベース７を固定しておく。
まず、外部クレーンにより最上用の細径の第１鉄塔部材６ａを吊り上げ、既設鉄塔Ａの開口部ｂから既設鉄塔内に搬入し、せりあげ用の架台２の開口部２２ｂを通して内部に取り込み、組立てベース７上に受支させる。
【００２５】
せり上げ用搬器３はこのときには架台２の最上レベルに移動されている。次いでせり上げ用搬器３の下降により第１鉄塔部材６ａはせり上げ用搬器３に遊嵌される形となり、せり上げ用搬器３が下限位置で停止されたときに９０度間隔に位置する各吊りアーム３２，３２を第１鉄塔部材６ａの穴付きブラケット６２とそれぞれ係合させ、ボルトなどで連結する。この状態が図１１（ａ）である。
【００２６】
そして、せり上げ中に鉄塔部材が傾斜して既設鉄塔Ａに接触しあるいは倒れる危険を防止するため、鉛直度の監視制御手段を装備させる。
具体的には、図１２のように、第１鉄塔部材６ａの下端フランジ部６１にＸおよびＹの両方向の傾斜角度を検出可能な傾斜角度検出器８を取り付け、該傾斜角度検出器８の出力部と接続したケーブル８０を架台基部に導き、傾斜表示器８１に接続する。この傾斜表示器８１を常時監視し、せり上げ中に万一所定の傾きが発生したときには、警報を発するとともにクライミングウインチＥ等の作動を停止させ、傾斜を修復する。傾斜表示器８１は場合よってはＣＰＵを含むコントローラと接続され、警報とクライミングウインチＥ等の作動系とを自動的に制御するようにしてもよい。
【００２７】
ついで、クライミングウインチＥを作動させ、せり上げ用搬器３を上昇させる。せり上げ中、せり上げ用搬器３は各隅に設けられている転輪３１がそれぞれ架台２のガイドレール２３にはまった状態で移動してゆくため、せり上げ用搬器３は安定性よく移動する。また、第１鉄塔部材６ａは９０度ごとに吊りアーム３２，３２に連結固定されているので、せり上げ用搬器３内で横ぶれせず、安定した垂直状態に支持されつつ、せり上げ用搬器３とともに移動され、第１鉄塔部材６ａの上半部は支持手段４のレベルよりも上位に突出する。
【００２８】
この間、相対的に径の太い第２鉄塔部材６ｂは図１１（ａ）のようにクレーンＧにより吊られて待機している。
所定揚程までせり上げられた第１鉄塔部材６ａがその位置に保持されると、前記第２鉄塔部材６ｂが架台内に搬入され、下端のフランジ６１をもって第１鉄塔部材６ａの直下の組立てベース７上に受支される。フランジ６１は必要に応じて組立てベース７に仮止めされる。
この状態でせり上げ用搬器３は少し下降され、第２鉄塔部材６ｂの上端のフランジ６０と第１鉄塔部材６ａの下端のフランジ６１とが接続される。
この接続作業は、第２鉄塔部材６ｂが中空上に吊られた状態ではなく、組立てベース７上に立てられた状態であるため容易である。接続は、通常の場合、フランジ６０，６１同士をボルト締結することで行われるが、既設鉄塔Ａの切断されている頂部の開口寸法と鉄塔部材の径によっては、ボルト結合でなしに現場溶接で接続する。
【００２９】
このように第１と第２の鉄塔部材６ａ，６ｂの接続が終わると、支持手段４を作動させて第１鉄塔部材６ａを半径方向からクランプする。すなわち、油圧シリンダ４１，４１を作動すれば、ピストンロッドの伸長によって１組の水平アーム４２，４２が水平面上で内方へ傾動し、先端のクランプ部材４３，４３が第１鉄塔部材６ａの約１８０度対称位置をしっかりと把持する。
【００３０】
そして、第１鉄塔部材６ａの円周上で４方向（これは吊りアーム３２，３２との連結位置と４５度程度変位している）にあるガイドサポート手段５の可変長の連結要素５２，５２を連結する。これは台車５１に装備されているレバーホイストなどを操作して条体を繰出し、条体の先端を鉄塔部材６ａの金具に連結し、あるいは鉄塔部材外周に巻止めすることで行われる。これが図１１（ｂ）の状態である。
【００３１】
これを確認した後、せり上げ用搬器３の各組の吊りアーム３２，３２と第１鉄塔部材６ａの穴付きフランジとの連結を解除し、クライミングウインチＥを作動させてせり上げ用搬器３を第２鉄塔部材６ｂの周りで下降させる。これにより最第１と第２の鉄塔部材６ａ，６ｂは一時的に支持手段４によって半径方向から支持され、せり上げ用搬器３の降下中の周方向の位置ずれ、傾きの発生が防止される。
【００３２】
せり上げ用搬器３が下降限に達したならば、吊りアーム３２，３２を第２鉄塔部材６ｂの穴付きフランジ６２と連結する。これを確認したならば、支持手段４を開放側に作動させて第１鉄塔部材６ａの保持を解除するとともに、クライミングウインチＥを作動してせり上げ用搬器３を上昇させる。図１１（ｃ）はこの状態であり、これにより、第２鉄塔部材６ｂおよびこれと接続一体化されている第１鉄塔部材６ａはせり上げられる。
【００３３】
このときに、第１鉄塔部材６ａは架台２の上方において円周上の複数個所でガイドサポート手段５の連結要素５２，５２に連結されており、連結要素５２，５２の基部の台車５１，５１は垂直上の各ガイドレール５０，５０にコロ５１０，５１０によって係合している。
このため、鉄塔部材６ａのせり上がりに伴って連結要素５２，５２を搭載している台車５１，５１はガイドレール５０，５０に沿って同期移動し、連結要素５２，５２により半径方向から牽引されている第１鉄塔部材６ａは、横ぶれすることなく、垂直を保ってスムーズに上昇してゆく。第１鉄塔部材６ａが垂直状にせり上げられるため、第１鉄塔部材６ａと接続されている第２鉄塔部材６ｂは、せり上げ用搬器３の吊りアーム３２，３２に引っ張られて円滑に上昇する。
【００３４】
かくしてせり上げ用搬器３が上昇限に到り、第２鉄塔部材６ｂが頂部架台部分２Ｃから上方に突出すると、既設鉄塔Ａの外部に待機していた第３鉄塔部材６ｃが架台２内に搬入され、組立てベース７上に立てられる。そして、第２位鉄塔部材６ｂの下端フランジと前述したような方法で接続される。
そして、この接続が完了すると、支持手段４が作動され、第２鉄塔部材６ｂを軸線と直角方向から一時的に把持固定する。そして、せり上げ用搬器３の吊りアーム３２，３２の第２鉄塔部材６ｂとの連結が解除され、せり上げ用搬器３が第３鉄塔部材６ｃの下方まで下降され、前回と同じように吊りアーム３２，３２を第３鉄塔部材６ｃの穴付きフランジ６２，６２と連結する。
吊りアーム３２，３２は基端がフレームに枢支されかつ複数の節によって角度可変であり、かつ節が取外し可能となっているため、鉄塔部材の外径の変化に自在に追従することができる。
【００３５】
吊りアーム３２，３２との連結を確認したならば、支持手段４を開放側に作動させて第２鉄塔部材６ｂの保持を解除するとともに、クライミングウインチＥを作動してせり上げ用搬器３を上昇させる。
これによって第１ないし第３鉄塔部材６ａ，６ｂ，６ｃは一体一連の状態でせり上げられ、その時に、架台２の上方では、第１鉄塔部材６ａを半径方向から支えているガイドサポート手段５の台車５１，５１がガイドレール５０，５０に沿って上方へと同期移動する。
したがって、第１鉄塔部材６ａの高さレベルは第３鉄塔部材６ｃの長さ分だけ増すが、連結要素５２，５２により半径方向から牽引されているため、横ぶれすることなく、垂直を保ってスムーズに上昇することができる。
このせり上げ中の鉄塔部材の垂直度は常時傾斜角度検出器８によって検出されるので安全である。
【００３６】
以下、前述した工程にしたがって、第４以下の漸次太径の鉄塔部材６ｄ・・・が上位の鉄塔部材と順次接続され、支持手段４による支持、せり上げ用搬器３の吊りアーム３２，３２と鉄塔部材との連結解除、せり上げ用搬器３の下降、せり上げ用搬器３の吊りアーム３２，３２の鉄塔部材との接続、支持手段４による支持解除、せり上げ用搬器３の上昇という作業が繰り返されることにより、図１４（ｃ）〜（ｈ）のように鉄塔が組み立てられつつせりあげられてゆく。
【００３７】
この間、架台２の上方では、第１鉄塔部材６ａを半径方向から支えているガイドサポート手段４の台車５１，５１がガイドレール５０，５０に沿って上方へと移動して連結要素５２，５２により横ぶれが防止される。ガイドサポート手段５の台車５１，５１がガイドレール５０，５０の最上位に達すると、連結要素５２，５２は鉄塔部材との連結が解除され、台車５１，５１をガイドレール５０，５０に沿って下降させられる。
【００３８】
その下降位置において、連結要素５２，５２は求心方向に繰り出され、第１鉄塔部材６ａ位より下位の鉄塔部材と連結しなおされる。連結要素５２，５２は可変長であるから、鉄塔部材の径の変化に簡単に追従することができ、これにより、鉄塔部材（塔体）は高さが増しても傾かずに安定してせりあげられる。
かかるガイドサポート手段５の鉄塔部材に対する付替えは、各回のせり上げごとに行われてもよいし、数回のせり上げごとに１回行われてもよい。
【００３９】
最後に基端用の最も太径の鉄塔部材（この例では第９鉄塔部材６ｉ）が架台２内に搬入され、組立てベース７を撤去した基礎天端部１に強固に接続される。そして、この第９鉄塔部材６ｉは、すでに相互に接続されてせり上げられている鉄塔部分Ｔ’の最下位の第８鉄塔部材６ｈと接続される。これで図１４（ｈ）のように既設鉄塔内に新規な鋼管鉄塔Ｔが建設されたことになる。
【００４０】
あとは、図１５のように、せりあげ用の架台２、支持手段４、ガイドサポート手段５を既設鉄塔Ａ内から撤去し、ラフタークレーンＦなどにより鋼管鉄塔Ｔの上部に腕金ｔを取り付け、それら腕金ｔに送電線を架線する。そして、既設鉄塔Ａを解体し、撤去する。これで図１６に示す新設単体鉄塔が完了する。
本発明においては、既設鉄塔の送電線を活線状態にしたままで鋼管鉄塔Ｔを完成させるので、停電時間を最少限とすることができる大きなメリットがある。
【００４１】
【発明の効果】
以上説明した本発明の請求項１によるときには、既設鉄塔Ａを有効に活用してその敷地内でしかも既設鉄塔Ａに荷重をかけずかつまた送電線を活線状態のまま容易に鉄塔を新設することができ、せり上げ時に既設鉄塔内で上位鉄塔部分の振れを防止しながら行なうので、新設塔体が高くても安全かつスムーズにせり上げを行なうことができ、人家が密集し用地スペースが十分にとれない場所においても短期間で円滑に元位置鉄塔建替えを行なえるというすぐれた効果が得られる。
【００４２】
請求項２によれば、既設鉄塔Ａに何ら荷重をかけることなく新設鉄塔を組み立てることができ、しかも、架台２のガイドレール２３，２３に沿ってせり上げ用搬器３が上昇し、このときに架台の上方では漸次高さが増す新設鉄塔の上部をガイドサポート手段５で半径方向から支えるので、次第に高さが増す鉄塔部材がせり上げ中に横振れすることが無く、また、ガイドサポート手段５より下方で支持手段４がせり上げ用搬器３の下降し次のせり上げを開始する間、鉄塔部材を半径方向からしっかりと支えるので、鉄塔部材の確実な安定性と垂直性が確保され、安全かつスムーズに新規鉄塔建設を行なえる。
【００４３】
また、架台がベース部２Ａ、中間架台部２Ｂ，頂部架台部２Ｃに分割され、ベース部２Ａは基礎天端部１の周りに接地する脚部２００を相互につなぐ横梁部２０１を有し、横梁部２０１の内側のリブ２０２が前記基礎天端部に設けたリブ１０２に連結されることで基礎天端部１と一体化されるように構成されているので、架台２が新設鉄塔基礎と一体化され、強固に据え付けられ、したがって、せり上げ中に架台２がぐらついたりせず、安全かつスムーズに新規鉄塔のせり上げを行なえる。
【００４４】
また、ガイドサポート手段５は、支持手段４の台枠フレーム４０上に下部が固定され、相互の間隔が架台２を突出する鉄塔部材の最大径のものが適度のゆとりをもって移動しうる大きさの複数基のガイドレール５０と、各ガイドレール５０に沿って昇降可能な複数の台車５１と、それぞれの台車５１に装備され鉄塔部材の径の変化に対応可能なように繰出し繰込可能な連結要素５２とを備えているので、径が漸次変化する鉄塔部分の上部が常に半径方向から支えられながらスムーズにせり上げられることになり、倒れによる既設鉄塔への荷重付加あるいは活線状態にある送電線の切断といったトラブルの発生を回避することができる。
【００４５】
さらに、支持手段４が頂部架台部２Ｃに据え付けられ内側に鉄塔部材が貫通される空間を形成した矩形状の台枠フレーム４０と、この台枠フレーム４０内の対偶位置に横置された複数の油圧シリンダ４１，４１と、基端が台枠フレーム４０に枢支され、自由端側に鉄塔部材と接するクランプ部材４３を首振り可能に連結し、中間が前記油圧シリンダ４１，４１に連結されて水平面内で傾動可能な複数のアーム４２，４２を備えているので、鉄塔部材の径の変化に自在に追従することができ、しかも油圧シリンダ４１が外部へ突出しないコンパクトな構造とすることができ、既設鉄塔への搬出入や据付けが容易となるというすぐれた効果が得られる。
【図面の簡単な説明】
【図１】本発明による送電鉄塔の組立て方法の前作業の第１ステップを示す正面図である。
【図２】第２ステップの説明図である。
【図３】第３ステップの斜視図である。
【図４】第４ステップの斜視図である。
【図５】第４ステップの完了状態を示す横断面図である。
【図６】架台組立て状態を示す斜視図である。
【図７】架台組立て状態を示す斜視図である。
【図８】架台組立て完了状態を示す斜視図である。
【図９】架台組立て完了状態を示す正面図である。
【図１０】（ａ）（ｂ）（ｃ）は本発明で使用する鉄塔部材の第１から第３の鉄塔部材の例を示す側面図である。
【図１１】（ａ）（ｂ）（ｃ）は第１と第２の鉄塔部材のせり上げ工程の説明図である。
【図１２】第１鉄塔部材のせり上げ開始時の状態を示す説明図である。
【図１３】鉄塔部材せり上げ中の搬器との取り合いを示す斜視図である。
【図１４】（ａ）〜（ｈ）はせり上げ開始から鉄塔組立て完了までの状態を段階的に示す側面図である。
【図１５】新設鉄塔に対する腕金取り付け段階を示す側面図である。
【図１６】新設鉄塔完成状態を示す側面図である。
【図１７】本発明による送電鉄塔組立て装置の一例を示す側面図である。
【図１８】図１７のＸ−Ｘ線に沿う断面図である。
【図１９】図１７のＹ−Ｙ線に沿う断面図である。
【図２０】図１７のＺ−Ｚ線に沿う断面図である。
【符号の説明】
Ａ既設送電鉄塔
ｂ開口部
１基礎天端部（脚部材）
２架台
２Ａベース部分
３せり上げ用搬器
４支持手段
５ガイドサポート手段
６ａ〜６ｉ鉄塔部材
２３ガイドレール
３１転輪３１
３２吊りアーム
４１油圧シリンダ
４２アーム
４３クランプ部材
５０ガイドレール
５１台車
５２可変長の連結要素
１０２リブ
２０２リブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for rebuilding a power transmission tower.
[0002]
[Prior art]
In general, a power transmission tower is constructed by assembling and connecting struts made of shape steel on a foundation, and connecting braces between the struts.
When such a power transmission tower has been built for many years, there is a shortage in the ground clearance due to the appearance of elevated structures and high-rise buildings in the vicinity.
As a countermeasure, it is conceivable to dismantle the existing power transmission tower and construct a new power transmission tower on the site. However, the area around the transmission tower is often developed with the passage of time, and many houses are crowded.In this case, new steel materials are assembled on a site with a small space, and they are carried out under live line conditions. It is almost impossible to do so, and enormous time and cost, as well as restrictions on the activities of the local residents, are inevitable. For this reason, the implementation was delayed while steel tower rebuilding was required.
[0003]
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to make it easy and safe to make a high tower in a live line state without applying a load to the existing tower within the existing power transmission tower site. An object of the present invention is to provide a steel tower assembling method suitable for rebuilding an original position steel tower in an urban area.
Another object of the present invention is to provide a steel tower assembly apparatus suitable for carrying out the method.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the first invention is characterized in that a single steel pipe tower is constructed in the following process within an existing power transmission tower.
1) Open the required side of the existing power transmission tower and cut the top, construct the tower foundation in the existing power transmission tower, and around the tower base, the tower member is placed on the same side as the opening of the existing steel tower. A frame-like gantry with openings suitable for carrying in and installed with guide rails installed vertically at multiple locations inside is installed. Inside the gantry, there are wheels on the outside that move along the guide rails. A liftable lifting device having a plurality of suspension arms with respect to several places on the circumference of the member is arranged, and a support means for temporarily supporting the upper steel tower member is provided at the top of the gantry, the support A guide support means for holding the upper steel tower member from the radial direction above the means is provided,
2) Prepare a steel tower member by dividing the steel pipe into unit length outside the existing power transmission tower,
3) The uppermost steel tower member is loaded through the open side of the existing power transmission tower and the opening on the side of the frame, and this is connected to the suspension arm of the lifting equipment and the required height in the existing power transmission tower by the lifting equipment. Raised up to
4) The next steel tower member is carried through the open side of the existing power transmission tower and the opening on the side surface of the mount, connected to the steel tower member, and the suspension arm of the lifter 3 is separated from the top steel tower member. While the lifter is lowered, the upper steel tower member is temporarily supported by the support means, the suspension arm of the lifter is connected to the next steel tower member, and the upper steel tower member is connected by the guide support means. While lifting from the radial direction so that it is lifted while being kept in a vertical state, the whole is lifted by a lifting device,
5) Further, connect the lower steel tower member carried from the open side to the next steel tower member and lift it up by the above process, and repeat this process until the upper steel tower member protrudes the required length from the existing power transmission tower. A steel pipe simple steel tower is constructed by connecting lower steel tower members to the tower foundation.
[0005]
The second invention is a frame-shaped gantry installed on a foundation in an existing power transmission tower, a liftable elevator that is arranged in the gantry, and a raised tower provided on the top of the gantry A supporting means for temporarily supporting the upper steel tower member while the lifting crane is being lowered so that the lower steel tower member connected to the member is connected to the lifting arm of the lifting carrier to be lifted. And a guide support means for holding the steel tower member from the radial direction so as to be raised while being kept vertical when the steel tower member is lifted,
The base is divided into a base part, an intermediate base part, and a top base part, the base part has a cross beam part that connects the grounding parts around the base top end part, and the rib inside the cross beam part is the base It is configured to be integrated with the base top end by being connected to the rib provided at the top end, and the intermediate mount and the top mount are flat as a whole by the pillar frames of the four corners and the cross beam connecting them. Is formed in a rectangular frame, on the same side as the opening of the existing steel tower, an opening suitable for carrying in the steel tower member is provided, and in each of the four corner pillar frames, guide rails are vertically provided,
The lifting transporter has a rectangular frame-like frame, and the upper and lower ends of each corner of the frame are attached with rolling wheels in contact with the guide rail of the gantry. A plurality of sets of suspension arms are provided to transmit the lifting force by connecting from the radial direction,
The support means is a rectangular frame frame that is installed in the top frame portion and forms a space through which a steel tower member is penetrated, and a plurality of hydraulic cylinders that are horizontally disposed at the even position in the frame frame; The base end is pivotally supported by the underframe frame, and a clamp member that contacts the steel tower member is connected to the free end side so as to be able to swing, and the middle is provided with a plurality of arms that are connected to the hydraulic cylinder (and can be tilted in a horizontal plane) And
The guide support means has a plurality of guide rails whose lower portions are fixed on the frame frame of the support means, and whose distance between them is such that the steel tower member having the maximum diameter protruding from the pedestal can move with a moderate clearance. And a plurality of carriages that can be moved up and down along each guide rail, and a connecting element that is provided on each carriage and that can be extended and fed so that it can respond to a change in the diameter of the tower member. Yes.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Less than The present invention The embodiment will be described with reference to the accompanying drawings.
1 to 16 show an example of a method for assembling a power transmission tower according to the present invention.
In the present invention, first, a pre-operation is carried out for securing a working space in an existing power transmission tower and carrying in and raising a steel tower member for a new steel tower.
That is, as a first step, as shown in FIG. 1, the top portion a of an existing power transmission tower (hereinafter referred to as an existing tower) A is cut in order to allow the new tower to protrude upward. And the ground line currently installed in the existing steel tower A is transferred, and also the opening part b is formed in the side surface of the lower half area of the existing steel tower A. However, the armature of the existing tower A is left as it is, and the power transmission line is brought to a live line state.
[0008]
Next, as a second step, foundation work is performed on the site of the existing tower A to construct a foundation for a new tower. This method is arbitrary. For example, it is performed by excavating the site of an existing steel tower, carrying the foundation body C through the opening b, inserting it into the excavation hole, and placing concrete with a reinforcing bar set. . At this time, a large number of installation bolts d are projected from the foundation.
[0009]
As a third step, a base top end (leg member) 1 for a newly installed tower is provided, and a stand 2 of a lifting device is installed so as to surround the base top end 1.
The base top end portion 1 has a flange 100 for inserting the installation bolt d around it, and is firmly integrated with the foundation by screwing a nut onto the top of the installation bolt d. The base top end portion 1 has a connecting flange 101 at the top, and ribs 102 are provided on the trunk portion so as to project in the radial direction at intervals of 90 degrees, for example.
[0010]
The lifting platform 2 facilitates carrying in and out of the existing steel tower A and assembling, and the size of the opening b of the existing steel tower A is the minimum necessary size without causing anxiety about the strength of the steel tower. For the sake of simplicity, it is divided into a plurality of parts such as the base portion 2A, the intermediate frame portion 2B, and the top frame portion 2C.
[0011]
As shown in FIGS. 4 and 5, the base portion 2 </ b> A has four leg portions 200 that come in contact with the concrete surface around the base top end portion 1 and a cross beam portion 201 that connects them to each other. A rib 202 corresponding to the rib 102 is protruded on the inner side.
The ribs 102 and 202 are fastened by connecting bolts, whereby the base portion 2A and the base top end portion 1 are integrated, so that the lifting stand 2 is stably installed. A climbing winch E is installed on the side of the base portion 2A.
[0012]
Subsequently, as shown in FIGS. 6 and 7, the intermediate gantry 2B and the top gantry 2C are sequentially carried in by the crane G from the opening b of the existing steel tower A, and are installed and connected to the base 2A. As shown in FIG. 8 and FIG. 9, the mount 2 for raising the required height is assembled.
[0013]
In this gantry 2, a lifter 3 is arranged, and at the upper part of the gantry 2, support means 4 that temporarily supports the upper steel tower member from the radial direction when the new steel tower member is raised. The guide support means 5 is installed and fixed on the support means 4 so as to support and guide the steel tower member in the radial direction so that the steel tower member on the upper side is not tilted and kept vertical when the steel tower member is raised. .
The lifting device 3 is connected to the climbing winch E through multiple sheaves. The middle or top pedestal 2B, 2C is connected to the base of the existing tower A by means of a wire rope as appropriate.
Preparation is now complete.
[0014]
The new steel tower member is composed of a plurality of unit steel pipes that divide the tower height to be constructed. That is, as shown in FIGS. 10 and 14, a steel pipe having a required unit length (for example, in the range of 2 to 6 m) whose diameter is sequentially changed in a range of, for example, 400 to 1400 mm is used. In FIG. 14, nine steel tower members 6a to 6i are shown as an example, and FIG. 10 representatively shows the steel tower members 6a, 6b, and 6c from the top to the third. Each steel tower member is provided with connecting flanges 60 and 61 at the upper and lower end portions, and brackets 62 with holes are provided at 90 ° intervals, for example, at least on the peripheral surface near the lower end. Preferably, brackets for connection with the guide support means 5 are provided. In addition, since the steel tower member which protrudes from the top part a of the existing steel tower A or is located in the vicinity of the top part is connected by field welding according to the diameter, it is not necessary to provide a flange in that case. .
[0015]
Here, the details of the lifting device that is characteristic of the present invention will be described. FIG. 17 to FIG. 20 show one embodiment.
As shown in FIG. 17 and FIG. 19, the intermediate frame 2B and the top frame 2C of the lifting frame 2 are provided with pillar frames 20 at four corners and cross beam members 21 connecting them, and the plane is a rectangular frame as a whole. The opening 22b suitable for carrying in the steel tower members 6a-6i is provided in the same side as the opening part b of the existing steel tower.
In addition, guide rails 23 made of grooved steel or the like are vertically provided on the column frames 20 at the four corners of the intermediate frame 2B and the top frame 2C.
[0016]
The lifter 3 has a rectangular frame 30, and ends of the climbing winch E connected to two opposing surfaces of the frame 30 through a sheave. Rollers 31 and 31 that are in contact with the guide rail 23 of the gantry 2 are attached to the upper and lower ends of each corner 30.
In addition, a plurality of sets of suspension arms 32 are provided on the inner side of the frame 30 of the lifter 3 to connect the steel tower members 6a to 6h from the radial direction and transmit the lifting force.
[0017]
Each set of suspension arms 32 has a yoke-like connecting portion that is connected to the brackets with holes of the steel tower members 6a to 6h by pins or bolts, but the steel tower members 6a to 6h have a diameter as described above. Changes in the range of 400 to 1200 mm. Therefore, as shown in FIG. 17, the suspension arms 32 of each group are pivotally supported at the base end thereof on the frame 30 by the pivot shaft 320 so that the angle is variable.
Further, in order to prevent the suspension angle from changing as much as possible, each suspension arm 32 connects at least the first step portion 32a for large diameters and the second step portion 32b for small diameters so that they can be connected and separated by a shaft. It is out.
[0018]
The support means 4 includes one or more upper side members until the connection between the upper steel tower member and the suspension arm 32 is released, and the lifter 3 is lowered to connect the lower steel tower member to the suspension arm 32. The steel tower member is clamped from the radial direction to support it so as to keep it vertical. Of course, it also has a function of temporarily supporting a vertical load.
The support means 4 is installed on the top frame 2C and has a rectangular frame frame 40 in which a space through which a steel tower member passes is formed, and a pair of horizontal frames placed at a pair position in the frame frame 40. A manually operated hydraulic cylinder, such as jack cylinders 41, 41, and a pair of horizontal arms 42 having a base end pivotally supported by the base frame 40 and a free end side clamp member 43 in contact with the steel tower member connected in a swingable manner. , 42.
[0019]
Piston rods of the hydraulic cylinders 41 and 41 are connected to intermediate portions of the horizontal arms 42 and 42. The clamp member 43 has an elastic member 430 such as rubber attached to the contact surface with the steel tower member.
When there is a space between the supporting means 4 and the existing steel tower in the radial direction, a hydraulic cylinder may be arranged perpendicular to the axis of the steel tower member, and a clamp member may be connected to the tip of the piston rod of the hydraulic cylinder. . However, in this configuration, an increase in size cannot be avoided, and there are difficulties in carrying in and out of the existing steel tower A. In the case of the configuration as described above, there is an advantage that it is compact and can cope with a change in the diameter of the steel tower member.
[0020]
The guide support means 5 includes a plurality of guide rails 50 each having a lower part fixed to a support seat 45 provided on the frame frame 40 of the support means 4 so as to be displaced by 45 degrees, and along the guide rails 50. A plurality of carriages 51 that can be moved up and down, and a connecting element 52 that is provided on each carriage 51 and that can be fed out (variable length) so as to accommodate changes in the diameter of the steel tower member.
[0021]
The guide rail 50 is made of a section steel, for example, an H-section steel, and four guide rails 50 are arranged at intervals of at least 90 degrees. The interval is set such that the steel tower member with the maximum diameter protruding from the gantry 2 can move with a suitable clearance. The height of the guide rail 50 is set as appropriate, but preferably has a dimension that reaches or near the cut top portion a of the existing tower A. Therefore, the guide rail 50 is configured by connecting the parts divided into predetermined lengths by joints.
[0022]
The guide rails 50 are connected to each other by a lateral connecting member 500, and each carriage 51 has a plurality of sets of rollers 510 that are in contact with the guide rails 50 so as not to come off. The variable-length connecting element 52 may be a manual jack or a telescopic rod. In this example, the variable-length connecting element 52 is composed of a lever hoist attached to the carriage 51. Or is wound around the outer periphery of a steel tower member.
In addition, a work deck 9 is installed at a suitable place such as the middle of the gantry 2 as shown in FIG.
[0023]
Subsequently, the main process of the steel tower construction by this invention is demonstrated.
In the present invention, basically, as shown in FIG. 14, relatively large-diameter steel tower members 6b, 6c,... Sequentially carry in, connect the upper steel tower member and the lower steel tower member, and repeat the raising operation until the required tower height is reached. The lowermost thick steel tower member 6i is a series of heads above it. In addition to being connected to the body, it is rigidly connected to the basic top end 1 to obtain a steel pipe simple steel tower T as shown in FIG.
[0024]
This process is shown in FIGS.
More specifically, an assembly base 7 that can be bolted by inserting a hand from the side to the top of the base top end 1 is fixed.
First, the uppermost narrow first steel tower member 6a is lifted by an external crane, carried into the existing steel tower from the opening b of the existing steel tower A, taken into the inside through the opening 22b of the lifting stand 2 and assembled. Support on base 7.
[0025]
The lifter 3 is moved to the uppermost level of the gantry 2 at this time. Next, the first steel tower member 6a is loosely fitted to the lifting device 3 when the lifting device 3 is lowered, and the suspension members positioned at intervals of 90 degrees when the lifting device 3 is stopped at the lower limit position. The arms 32 and 32 are respectively engaged with the holed brackets 62 of the first tower member 6a and connected with bolts or the like. This state is shown in FIG.
[0026]
And in order to prevent the danger that a steel tower member will incline and touch the existing steel tower A or fall during raising, it equips with the monitoring control means of a perpendicularity.
Specifically, as shown in FIG. 12, a tilt angle detector 8 capable of detecting tilt angles in both the X and Y directions is attached to the lower end flange portion 61 of the first steel tower member 6a, and the output of the tilt angle detector 8 is provided. The cable 80 connected to the unit is guided to the gantry base and connected to the tilt indicator 81. The tilt indicator 81 is constantly monitored, and if a predetermined tilt occurs during raising, an alarm is issued and the operation of the climbing winch E is stopped to restore the tilt. In some cases, the tilt indicator 81 is connected to a controller including a CPU, and may automatically control an alarm and an operating system such as a climbing winch E.
[0027]
Next, the climbing winch E is actuated to raise the lifter 3. During the lifting, the lifting transporter 3 moves while the rolling wheels 31 provided at the respective corners are engaged with the guide rails 23 of the gantry 2, so that the lifting transporter 3 moves with good stability. . Further, since the first steel tower member 6a is connected and fixed to the suspension arms 32 and 32 every 90 degrees, the first iron tower member 6a is supported in a stable vertical state without being swayed in the lifter 3 and while being supported in a stable vertical state. 3, the upper half of the first steel tower member 6 a protrudes higher than the level of the support means 4.
[0028]
During this time, the second steel tower member 6b having a relatively large diameter is suspended by the crane G as shown in FIG.
When the first tower member 6a raised to the predetermined lift is held in that position, the second tower member 6b is carried into the gantry, and the assembly base 7 immediately below the first tower member 6a is provided with the flange 61 at the lower end. It is received on top. The flange 61 is temporarily fixed to the assembly base 7 as necessary.
In this state, the lifter 3 is slightly lowered, and the flange 60 at the upper end of the second tower member 6b and the flange 61 at the lower end of the first tower member 6a are connected.
This connection work is easy because the second steel tower member 6b is in a state of being erected on the assembly base 7, not in a state of being suspended above the hollow. Normally, the connection is performed by bolting the flanges 60 and 61 to each other. However, depending on the opening size of the cut top portion of the existing tower A and the diameter of the tower member, it is possible to perform the welding by field welding instead of bolt connection. Connecting.
[0029]
When the first and second tower members 6a and 6b are thus connected, the support means 4 is operated to clamp the first tower member 6a from the radial direction. That is, when the hydraulic cylinders 41 and 41 are operated, the pair of horizontal arms 42 and 42 are tilted inward on the horizontal plane by the extension of the piston rod, and the clamp members 43 and 43 at the front ends are approximately the same as the first steel tower member 6a. Hold the 180 degree symmetrical position firmly.
[0030]
And the variable-length coupling elements 52, 52 of the guide support means 5 in four directions on the circumference of the first tower member 6a (which is displaced by about 45 degrees from the coupling position with the suspension arms 32, 32). Are connected. This is done by operating a lever hoist or the like equipped on the carriage 51 to feed out the strip and connecting the tip of the strip to the metal fitting of the tower member 6a or by winding it around the outer circumference of the tower member. This is the state of FIG.
[0031]
After confirming this, the connection between the suspension arms 32 and 32 of the lifting carrier 3 and the flange with the hole of the first tower member 6a is released, and the climbing winch E is operated to lift the lifting carrier 3 Lower around the second steel tower member 6b. As a result, the first and second steel tower members 6a and 6b are temporarily supported by the support means 4 from the radial direction, thereby preventing the occurrence of circumferential displacement and inclination during the descent of the lifter 3. .
[0032]
When the lifter 3 reaches the lower limit, the suspension arms 32 and 32 are connected to the flanged flange 62 of the second tower member 6b. If this is confirmed, the support means 4 is operated to the open side to release the holding of the first steel tower member 6a, and the climbing winch E is operated to raise the lifter 3. FIG. 11C shows this state, whereby the second tower member 6b and the first tower member 6a connected and integrated therewith are lifted.
[0033]
At this time, the first steel tower member 6a is connected to the connecting elements 52, 52 of the guide support means 5 at a plurality of positions on the circumference above the pedestal 2, and the base trucks 51, 51 of the connecting elements 52, 52 are connected. Is engaged with the guide rails 50, 50 in the vertical direction by rollers 510, 510.
For this reason, as the steel tower member 6 a rises, the carriages 51, 51 on which the coupling elements 52, 52 are mounted move synchronously along the guide rails 50, 50 and are pulled by the coupling elements 52, 52 from the radial direction. The 1st steel tower member 6a which rises does not shake sideways, and raises smoothly, maintaining perpendicularity. Since the first steel tower member 6a is lifted vertically, the second steel tower member 6b connected to the first steel tower member 6a is pulled up by the suspension arms 32, 32 of the lifter 3 and smoothly rises. .
[0034]
Thus, when the lifter 3 reaches the upper limit and the second steel tower member 6b protrudes upward from the top frame portion 2C, the third steel tower member 6c waiting outside the existing steel tower A is carried into the frame 2 And stand on the assembly base 7. And it connects with the lower end flange of the 2nd rank steel tower member 6b by the method mentioned above.
And when this connection is completed, the support means 4 will be operated and the 2nd steel tower member 6b will be temporarily hold | gripped and fixed from an orthogonal direction to an axis. And the connection with the 2nd steel tower member 6b of the suspension arms 32 and 32 of the raising transporter 3 is cancelled | released, the raising transporter 3 is lowered | hung below the 3rd steel tower member 6c, and a suspension arm is carried out like the last time. 32 and 32 are connected with the flanges 62 and 62 with holes of the 3rd steel tower member 6c.
Since the suspension arms 32 and 32 are pivotally supported at the base end by the frame and are variable in angle by a plurality of nodes, and the nodes can be removed, the suspension arms 32 and 32 can freely follow changes in the outer diameter of the steel tower member. .
[0035]
After confirming the connection with the suspension arms 32, 32, the support means 4 is operated to the open side to release the holding of the second steel tower member 6b, and the climbing winch E is operated to raise the lifter 3 Let
As a result, the first to third steel tower members 6a, 6b, and 6c are lifted up in a series of states. At that time, the guide support means 5 that supports the first steel tower member 6a from the radial direction above the gantry 2. The carriages 51 and 51 are synchronously moved upward along the guide rails 50 and 50.
Accordingly, the height level of the first steel tower member 6a is increased by the length of the third steel tower member 6c. However, since the first steel tower member 6a is pulled from the radial direction by the connecting elements 52, 52, the vertical level can be maintained without being swayed. It can rise smoothly.
Since the verticality of the steel tower member being raised is always detected by the inclination angle detector 8, it is safe.
[0036]
In the following, in accordance with the steps described above, the fourth and subsequent gradually increasing steel tower members 6d... Are sequentially connected to the upper steel tower members, supported by the support means 4, and the suspension arms 32, 32 of the lifter 3 The operations of releasing the connection with the steel tower member, lowering the lifter 3, connecting the suspension arms 32, 32 of the lifter 3 with the steel tower member, releasing the support by the support means 4, and lifting the lifter 3 are performed. By being repeated, the steel tower is raised while being assembled as shown in FIGS.
[0037]
Meanwhile, above the gantry 2, the carriages 51, 51 of the guide support means 4 that support the first steel tower member 6 a from the radial direction move upward along the guide rails 50, 50, and are connected by the connecting elements 52, 52. Side shake is prevented. When the carts 51, 51 of the guide support means 5 reach the top of the guide rails 50, 50, the coupling elements 52, 52 are disconnected from the steel tower member, and the carts 51, 51 are moved along the guide rails 50, 50. Be lowered.
[0038]
In the lowered position, the connecting elements 52, 52 are drawn out in the centripetal direction, and are reconnected to the lower tower member than the first tower member 6a. Since the connecting elements 52 and 52 are variable in length, they can easily follow changes in the diameter of the steel tower member, so that the steel tower member (tower body) can be stably stabilized without tilting. can give.
The replacement of the guide support means 5 with respect to the steel tower member may be performed every time it is raised, or once every several times it is raised.
[0039]
Finally, the largest-diameter steel tower member for base end (in this example, the ninth steel tower member 6i) is carried into the gantry 2 and is firmly connected to the base top end 1 from which the assembly base 7 has been removed. And this 9th steel tower member 6i is connected with the lowest 8th steel tower member 6h of the steel tower part T 'which has already been connected and raised. As a result, a new steel pipe tower T is constructed in the existing steel tower as shown in FIG.
[0040]
After that, as shown in FIG. 15, the lifting platform 2, the support means 4, and the guide support means 5 are removed from the existing steel tower A, and a brace t is attached to the upper part of the steel pipe steel tower T by a rough terrain crane F or the like. A power transmission line is installed on the arm t. Then, the existing steel tower A is dismantled and removed. This completes the new single steel tower shown in FIG.
In the present invention, since the steel pipe tower T is completed while the transmission line of the existing tower is in a live line state, there is a great merit that the power failure time can be minimized.
[0041]
【The invention's effect】
According to claim 1 of the present invention described above, the existing tower A is effectively used, and a new tower is easily installed in the site without applying a load to the existing tower A and with the transmission line in a live line state. Since the upper steel tower portion is prevented from shaking in the existing tower when it is raised, it can be raised safely and smoothly even if the new tower is high, and there is enough space for people to gather. Even in places where it cannot be removed, the excellent effect of being able to smoothly rebuild the original tower in a short period of time can be obtained.
[0042]
According to claim 2, the new tower can be assembled without applying any load to the existing tower A, and the lifter 3 rises along the guide rails 23, 23 of the gantry 2, and at this time The upper part of the new steel tower that gradually increases in height above the gantry is supported by the guide support means 5 from the radial direction, so that the steel tower member that gradually increases in height does not sway during lifting, and the guide support means 5 While the support means 4 descends below and starts the next lifting, the steel tower member is firmly supported from the radial direction, so that reliable stability and verticality of the steel tower member is ensured and safety is ensured. And new steel tower construction can be done smoothly.
[0043]
Further, the gantry is divided into a base part 2A, an intermediate gantry part 2B, and a top gantry part 2C, and the base part 2A has a cross beam part 201 that connects the leg parts 200 that are grounded around the base top end part 1, Since the rib 202 inside the portion 201 is connected to the rib 102 provided at the base top end portion so as to be integrated with the base top end portion 1, the gantry 2 is integrated with the newly installed steel tower foundation. Therefore, the gantry 2 does not wobble during the raising, and the new steel tower can be raised safely and smoothly.
[0044]
Further, the guide support means 5 has a lower portion fixed on the frame frame 40 of the support means 4, and the distance between them is such that the steel tower member with the largest diameter protruding from the pedestal 2 can move with a moderate clearance. A plurality of guide rails 50, a plurality of carriages 51 that can be moved up and down along each guide rail 50, and a connecting element that is provided on each carriage 51 and can be extended and fed so as to be able to cope with a change in the diameter of a steel tower member 52, so that the upper part of the tower part whose diameter gradually changes is always lifted up smoothly while being supported from the radial direction, and a load is applied to the existing tower due to falling or the transmission line is in a live line state. Occurrence of troubles such as disconnection can be avoided.
[0045]
Furthermore, a rectangular frame frame 40 in which the support means 4 is installed on the top frame 2C and a space through which the steel tower member is penetrated is formed, and a plurality of horizontal frame frames disposed at the opposite positions in the frame frame 40 The hydraulic cylinders 41 and 41 are pivotally supported at the base end by the frame frame 40, and a clamp member 43 in contact with the steel tower member is connected to the free end side so as to be able to swing, and the middle is connected to the hydraulic cylinders 41 and 41. Since a plurality of arms 42, 42 that can be tilted in a horizontal plane are provided, it is possible to freely follow changes in the diameter of the steel tower member, and a compact structure in which the hydraulic cylinder 41 does not protrude to the outside can be achieved. As a result, it is possible to obtain an excellent effect that it is easy to carry in / out and to / from the existing steel tower.
[Brief description of the drawings]
FIG. 1 is a front view showing a first step of a pre-operation of a method for assembling a power transmission tower according to the present invention.
FIG. 2 is an explanatory diagram of a second step.
FIG. 3 is a perspective view of a third step.
FIG. 4 is a perspective view of a fourth step.
FIG. 5 is a cross-sectional view showing a completed state of the fourth step.
FIG. 6 is a perspective view showing a state in which the gantry is assembled.
FIG. 7 is a perspective view showing a state in which the gantry is assembled.
FIG. 8 is a perspective view showing a state where the gantry assembly is completed.
FIG. 9 is a front view showing a state where the gantry assembly is completed.
FIGS. 10A, 10B and 10C are side views showing examples of first to third steel tower members of the steel tower member used in the present invention.
FIGS. 11A, 11B, and 11C are explanatory views of a step of raising the first and second steel tower members.
FIG. 12 is an explanatory view showing a state at the start of raising the first steel tower member.
FIG. 13 is a perspective view showing the engagement with the transporter while raising the steel tower member.
FIGS. 14A to 14H are side views showing in stages the state from the start of lifting up to the completion of steel tower assembly.
FIG. 15 is a side view showing a brace mounting stage for a new steel tower.
FIG. 16 is a side view showing a completed state of the new steel tower.
FIG. 17 is a side view showing an example of a power transmission tower assembling apparatus according to the present invention.
18 is a cross-sectional view taken along line XX of FIG.
19 is a cross-sectional view taken along line YY of FIG.
20 is a cross-sectional view taken along line ZZ in FIG.
[Explanation of symbols]
A Existing transmission tower
b Opening
1 Foundation top edge (leg member)
2 mount
2A base part
3 Lifter
4 Support means
5 Guide support means
6a-6i steel tower members
23 Guide rail
31 Wheel 31
32 Suspension arm
41 Hydraulic cylinder
42 arms
43 Clamp member
50 guide rail
51 trolley
52 Variable length connecting elements
102 Ribs
202 Ribs

Claims

A rebuilding method for an existing power transmission tower, wherein a steel pipe single tower (T) is constructed in the following process within the existing power transmission tower.
1) Open the required side of the existing power transmission tower (A) and excise the top, construct the tower foundation (1) in the existing power transmission tower, and install the existing steel tower around the tower foundation (1). A frame-shaped pedestal (2) having openings (22b) suitable for carrying steel tower members (6a to 6i) on the same side as the opening (b) and having guide rails (23) vertically installed at a plurality of locations inside is installed. Inside the gantry (2), there is a wheel (31) that moves along the guide rail (23) on the outside, and on the inside there are a plurality of suspension arms (32) for several places on the circumference of each tower member. ), And a support means (4) for temporarily supporting an upper steel tower member is provided on the top of the gantry (2), and the support means (4 ) Guide support means (5) for holding the upper steel tower member in the radial direction above Provided,
2) Prepare the steel tower member (6a-6i) which divided the steel pipe into unit length outside the existing power transmission tower (A),
3) The uppermost steel tower member (6a) is carried in through the open side surface (b) of the existing power transmission tower (A) and the opening (22b) on the side surface of the gantry (2), and this is loaded into the lifting device (3). Are connected to the suspension arms (32, 32) of the elevator and lifted up to the required height in the existing power transmission tower by the lifter (3),
4) The next steel tower member (6b) is carried through the open side surface (b) of the existing power transmission tower (A) and the opening (22b) on the side surface of the gantry (2) and connected to the steel tower member (6a). While the lifting arm (32, 32) of the lifting transporter 3 is separated from the uppermost tower member (6a) and the lifting transporter (3) is lowered, the upper tower member is supported by the support means (4). The suspension arm (32, 32) of the lifter (3) is connected to the next tower member (6b), and the upper steel tower member is made vertical by the guide support means (5). Lifting up the whole by the lifter (3) while holding from the radial direction so as to be lifted while being held,
5) Further, the lower steel tower member (6c) carried from the open side is connected to the next steel tower member (6b) and lifted up by the above-described process, and this process is carried out from the existing power transmission tower (A) to the upper steel tower member. A method for rebuilding a power transmission tower, wherein the steel tower single tower (T) is constructed by connecting the lowest steel tower member (6i) to the tower base (1) and repeating until the required length protrudes.

A frame-like gantry (2) installed on the foundation in the existing power transmission tower (A), a liftable lifting device (3) arranged in the gantry (2), and the gantry (2) The lower carrying tower (3) is lowered to connect the lower tower member connected to the raised tower member to the lifting arm (32, 32) of the raising carrier (3). During this time, the support means (4) for temporarily supporting the upper steel tower member and the support means (4) are provided above the support means (4), and the upper steel tower member is kept vertical when the steel tower member is raised. Guide support means (5) for holding from the radial direction so as to be raised while leaning,
The base is divided into a base part (2A), an intermediate base part (2B), and a top base part (2C), and the base part (2A) has a leg part (200) for grounding around the base top end part (1). It has a cross beam part (201) which is connected to each other, and a rib (202) inside the cross beam part (201) is connected to a rib (102) provided in the base top end part to thereby provide a base top end part (1). The intermediate frame part (2B) and the top frame part (2C) are configured as a rectangular frame as a whole by the four corner pillar frames (20) and the cross beam members (21) connecting them. The opening (22b) suitable for carrying in the steel tower members (6a to 6i) is provided on the same side as the opening (b) of the existing steel tower, and each of the four corner pillar frames (20) has a guide rail ( 23) is installed vertically,
The lifting carrier (3) has a rectangular frame (30), and the upper and lower ends of each corner of the frame (30) are in contact with the guide rail (23) of the gantry (2). Rings (31, 31) are attached, and a plurality of sets of suspension arms (32) are connected to the steel tower members (6a to 6h) from the radial direction to transmit the lifting force inside the frame (30). Is provided,
The support means (4) includes a rectangular frame frame (40) which is installed on the top frame (2C) and has a space through which a steel tower member penetrates, and an even pair in the frame frame (40). A plurality of hydraulic cylinders (41, 41) placed horizontally at a position and a base end pivotally supported by a frame frame (40), and a clamp member (43) contacting a steel tower member on the free end side are connected so as to be able to swing. And a plurality of arms (42, 42) that are connected to the hydraulic cylinders (41, 41) and can be tilted in a horizontal plane.
As for the guide support means (5), the lower part is fixed on the frame frame (40) of the support means (4), and the distance between them is the maximum diameter of the steel tower member protruding from the pedestal (2). A plurality of guide rails (50) of a size that can be moved with a plurality, a plurality of carriages (51) that can be moved up and down along each guide rail (50), and the diameter of a steel tower member mounted on each carriage (51) A transmission tower rebuilding device comprising a connecting element (52) that can be fed and fed so as to be able to cope with changes in the power transmission tower.