JP7240959B2 - Hanging jig and steel tower dismantling method - Google Patents

Hanging jig and steel tower dismantling method Download PDF

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JP7240959B2
JP7240959B2 JP2019106589A JP2019106589A JP7240959B2 JP 7240959 B2 JP7240959 B2 JP 7240959B2 JP 2019106589 A JP2019106589 A JP 2019106589A JP 2019106589 A JP2019106589 A JP 2019106589A JP 7240959 B2 JP7240959 B2 JP 7240959B2
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steel tower
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秀雄 小林
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Taisei Corp
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本発明は、吊り治具、およびこの吊り治具を用いた鉄塔の解体方法に関する。 TECHNICAL FIELD The present invention relates to a hoisting jig and a steel tower dismantling method using the hoisting jig.

従来より、鉄塔を横倒しして解体する方法が提案されている。（特許文献１、２参照）。
特許文献１には、転倒側の鉄塔支柱の下部と転倒側とは反対側の鉄塔支柱の下部とをケーブルで連結し、転倒側の各鉄塔支柱の下部について高さ方向に並ぶ３箇所を発破切断して、鉄塔を転倒させる方法が示されている。
特許文献２には、煙突本体の倒し方向側の最下部位置に、除去部分を形成する工程と、煙突支持用鉄塔の構成要素の倒し方向側とは反対側の所定領域の煙突用土台部との固定状態の解除を行なう工程と、煙突本体および煙突支持用鉄塔に対し倒し方向に力を加え、煙突本体および煙突支持用鉄塔を同時に倒す工程と、を含む鉄塔支持形煙突構造物の倒し方法が示されている。 Conventionally, a method of dismantling a steel tower by laying it on its side has been proposed. (See Patent Documents 1 and 2).
In Patent Document 1, the lower part of the steel tower support on the overturning side and the lower part of the steel tower support on the side opposite to the overturning side are connected with a cable, and the lower part of each steel tower support on the overturning side is blasted at three locations aligned in the height direction. It shows how to cut and tip the pylon.
In Patent Document 2, a step of forming a removed portion at the lowest position on the tilting direction side of the chimney body, and a chimney base portion in a predetermined area on the side opposite to the tilting direction side of the components of the chimney supporting steel tower. and applying a force in a tilting direction to the chimney main body and the chimney supporting steel tower to bring down the chimney main body and the chimney supporting steel tower at the same time. It is shown.

特開２００３－１８４３４４号公報JP 2003-184344 A 特開２００７－３２７３０１号公報Japanese Patent Application Laid-Open No. 2007-327301

本発明は、鉄塔を横倒しして解体する際、鉄塔を確実かつ安全に吊り上げることができる吊り治具、およびこの吊り治具を用いた鉄塔の解体方法を提案することを課題とする。 An object of the present invention is to propose a hoisting jig capable of reliably and safely lifting a pylon when dismantling the pylon by laying it sideways, and a dismantling method of the pylon using this hoisting jig.

本発明者は、鉄塔解体時に鉄塔を吊り上げるために用いる吊り冶具として、鉄塔の高所であっても、確実かつ容易に取付けが可能な、鉄塔の支柱を挟持する一対の挟持体と、挟持体同士を締結するボルトおよびナットと、を備えた吊り冶具を開発した。また、本発明者は、この吊り冶具を使用して、鉄塔を吊り上げた状態で、鉄塔の下端側を切断し、切断した鉄塔を地上に横倒しした後に解体する解体手順を発明するに至った。
第１の発明の吊り治具（例えば、後述の吊り治具３０）は、鉄塔（例えば、後述の鉄塔３）を吊り上げるための吊り冶具であって、前記鉄塔の支柱（例えば、後述の支柱１０）を挟んで配置された一対の挟持体（例えば、後述の挟持体３１、３１Ａ）と、当該挟持体同士を連結する締結具（例えば、後述のボルト３２およびナット３３）と、を備え、前記一対の挟持体の少なくとも一方には、吊りピース（例えば、後述の吊りピース３４）が設けられることを特徴とする。 The inventor of the present invention has developed a pair of clamping bodies for clamping the support of the steel tower, and a clamping body, which can be reliably and easily mounted even at a high place of the steel tower as a lifting jig used for lifting the steel tower when the steel tower is dismantled. We have developed a hanging jig with bolts and nuts that fasten them together. In addition, the inventor of the present invention has invented a dismantling procedure of cutting the lower end side of the steel tower with the steel tower lifted using this lifting jig, laying the cut steel tower sideways on the ground, and dismantling it.
A hoisting jig (for example, a hoisting jig 30 to be described later) of the first invention is a hoisting jig for lifting a steel tower (for example, a steel tower 3 to be described later), and is a support for the steel tower (for example, a support 10 to be described later). ) sandwiched between a pair of clamping bodies (for example, clamping bodies 31 and 31A to be described later), and a fastener (for example, a bolt 32 and a nut 33 to be described later) for connecting the clamping bodies to each other. At least one of the pair of holding bodies is characterized by being provided with a hanging piece (for example, a hanging piece 34 to be described later).

この発明によれば、鉄塔の支柱に一対の挟持体を配置し、締結具により挟持体同士を連結する。次に、吊りピースにワイヤを連結して、このワイヤを揚重機で吊り上げる。これにより、鉄塔を確実かつ安全に吊り上げることができる。 According to this invention, a pair of clamping bodies are arranged on the columns of the steel tower, and the clamping bodies are connected to each other by the fasteners. Next, a wire is connected to the suspension piece, and the wire is lifted by a lifting machine. As a result, the steel tower can be lifted reliably and safely.

第２の発明の吊り治具は、前記一対の挟持体は、それぞれ、半円筒形状の本体（例えば、後述の本体４０）と、当該本体から外側に延びる平板部（例えば、後述の平板部４１）と、前記本体の外周面に沿って設けられる半円環状の補剛部（例えば、後述の補剛部４２）と、を備えることを特徴とする。 In the hoisting jig of the second invention, each of the pair of clamping bodies includes a semicylindrical main body (for example, a main body 40 to be described later) and a flat plate portion (for example, a flat plate portion 41 to be described later) extending outward from the main body. ) and a semi-circular stiffening portion (for example, a stiffening portion 42 to be described later) provided along the outer peripheral surface of the main body.

この発明によれば、挟持体を構成する本体の外周面に補剛部を設けたので、挟持体の剛性が向上する。よって、吊り冶具を使用して、鉄塔を確実に吊り上げることができる。 According to this invention, since the stiffening portion is provided on the outer peripheral surface of the main body that constitutes the holding body, the rigidity of the holding body is improved. Therefore, the steel tower can be reliably lifted using the lifting jig.

第３の発明の鉄塔の解体方法は、上述の吊り冶具を用いて、複数の支柱を有する鉄塔を解体する方法であって、前記鉄塔の支柱の上部に前記吊り冶具を取り付ける工程（例えば、後述のステップＳ４１）と、揚重機により、前記吊り冶具の吊りピースに取り付けたワイヤ（例えば、後述のワイヤ２２）を介して前記鉄塔を吊り下げ支持し、この状態で、前記鉄塔の下端側を切断する工程（例えば、後述のステップＳ４２）と、当該切断した鉄塔を地表面に横倒しして載置する工程（例えば、後述のステップＳ４３）と、当該横倒しした鉄塔を分割する工程（例えば、後述のステップＳ４４）と、を含むことを特徴とする。 A steel tower dismantling method according to a third aspect of the invention is a method of dismantling a steel tower having a plurality of pillars using the above-described lifting jig, and includes a step of attaching the lifting jig to the top of the pillar of the steel tower (for example, step S41), the steel tower is suspended and supported by a lifting machine via a wire (for example, a wire 22 described later) attached to a suspension piece of the suspension jig, and in this state, the lower end side of the steel tower is cut. a step of laying down the cut steel tower on the ground surface (for example, step S43 described later); and a step of dividing the laid down steel tower (for example, step S42 described later) Step S44) and, are included.

この発明によれば、吊り冶具を使用して鉄塔を吊り下げ支持した状態で、鉄塔の下端側を切断して、この切断した鉄塔を地表面に横倒して載置し、その後、この横倒しした鉄塔を分割して解体するので、鉄塔を短時間で解体できる。 According to the present invention, the lower end of the steel tower is cut while the steel tower is suspended and supported using a lifting jig, and the cut steel tower is placed sideways on the ground surface. is divided and dismantled, the steel tower can be dismantled in a short time.

本発明によれば、鉄塔を横倒しして解体する際、鉄塔を確実かつ安全に吊り上げることができる吊り治具、およびこの吊り治具を用いた鉄塔の解体方法を提案できる。 Advantageous Effects of Invention According to the present invention, it is possible to propose a hoisting jig capable of reliably and safely hoisting a pylon when dismantling the pylon by laying it sideways, and a dismantling method of the pylon using this hoisting jig.

本発明の第１実施形態に係る鉄塔の解体方法により解体される高架水槽施設の側面図である。1 is a side view of an elevated water tank facility dismantled by a steel tower dismantling method according to a first embodiment of the present invention; FIG. 図１の高架水槽施設の解体手順のフローチャートである。1. It is a flowchart of the dismantling procedure of the elevated water tank facility of FIG. 図１の高架水槽施設の解体手順の説明図（その１：点検歩廊の撤去）である。FIG. 2 is an explanatory diagram (part 1: removal of an inspection corridor) of the dismantling procedure of the elevated water tank facility of FIG. 1; 図１の高架水槽施設の解体手順の説明図（その２：高架水槽の撤去）である。FIG. 2 is an explanatory diagram of the dismantling procedure of the elevated water tank facility of FIG. 1 (part 2: removal of the elevated water tank); 図１の高架水槽施設の鉄塔の解体手順のフローチャートである。1. It is a flowchart of the dismantling procedure of the steel tower of the elevated water tank facility of FIG. 鉄塔の解体手順の説明図（その１：吊り治具の取り付け）である。FIG. 10 is an explanatory diagram of the dismantling procedure of the steel tower (part 1: attachment of the hanging jig); 鉄塔の解体手順の説明図（その２：吊り治具の斜視図）である。It is explanatory drawing (2: perspective view of a hanging jig) of the dismantling procedure of a steel tower. 鉄塔の解体手順の説明図（その３：鉄塔の切り離し）である。FIG. 11 is an explanatory diagram of the dismantling procedure of the steel tower (No. 3: detachment of the steel tower); 鉄塔の解体手順の説明図（その４：鉄塔の横倒し）である。FIG. 11 is an explanatory diagram of the dismantling procedure of the steel tower (part 4: laying down the steel tower); 鉄塔の解体手順の説明図（その５：横倒しした鉄塔の解体）である。FIG. 11 is an explanatory diagram of the dismantling procedure of the steel tower (No. 5: Dismantling of the overturned steel tower); 本発明の第２実施形態に係る鉄塔の解体方法に用いられる吊り治具の挟持体の斜視図である。FIG. 8 is a perspective view of a clamping body of a hanging jig used in the steel tower dismantling method according to the second embodiment of the present invention;

本発明は、鉄塔の解体時に鉄塔を吊り上げるために用いる吊り冶具と、この吊り冶具を使用した鉄塔の解体方法である。吊り冶具の主な特徴は、鉄塔の支柱を挟持する一対の挟持体と、この挟持体同士を締結するボルトおよびナットと、を含んで構成される点である。また、鉄塔の解体方法の主な特徴は、鉄塔の外周に外部足場を組み立てることなく、鉄塔の支柱に本発明の吊り冶具を取り付け、鉄塔を吊り上げた状態で、鉄塔の下端側を切断し、切断した鉄塔を地上に横倒しした後、解体する点である。
吊り冶具としては、支柱を挟持する一対の挟持体が分離しており、この挟持体同士をボルトおよびナットで締結する第１実施形態と、一対の挟持体の一端側同士を丁番で開閉可能に連結しておき、一対の挟持体の他端側同士をボルトおよびナットで締結する第２実施形態とがある。 The present invention relates to a lifting jig used for lifting a steel tower when the steel tower is dismantled, and a steel tower dismantling method using the lifting jig. The main feature of the hoisting jig is that it includes a pair of clamping bodies for clamping the columns of the steel tower, and bolts and nuts for fastening the clamping bodies together. In addition, the main feature of the steel tower dismantling method is that the lifting jig of the present invention is attached to the support of the steel tower without assembling an external scaffold on the outer periphery of the steel tower, and the lower end side of the steel tower is cut while the steel tower is lifted, The point is to dismantle the cut steel tower after laying it on its side on the ground.
As a hanging jig, a pair of clamping bodies for clamping a column are separated, and the clamping bodies are fastened with bolts and nuts in the first embodiment, and one end side of the pair of clamping bodies can be opened and closed with a hinge. There is a second embodiment in which the other end sides of the pair of clamping bodies are connected to each other with bolts and nuts.

以下、本発明の実施形態を図面に基づいて説明する。なお、以下の実施形態の説明にあたって、同一構成要件については同一符号を付し、その説明を省略もしくは簡略化する。
〔第１実施形態〕
図１は、本発明の第１実施形態に係る鉄塔の解体方法により解体される高架水槽施設１の側面図である。
高架水槽施設１は、地表面Ｇに設けられたポンプ室２と、このポンプ室２の上に架設された鉄塔３と、この鉄塔３の頂部に配置された高架水槽４と、を備える。
鉄塔３は、トラス状であり、４本の円筒状の支柱１０と、略水平に延びて支柱１０同士を連結する複数の連結材としての水平材１１と、斜め方向に延びて支柱１０と水平材１１の中央部とを連結する複数の斜材１２と、を備える。
鉄塔３の頂部には、連結材としての歩廊１３が設けられ、この歩廊１３の周縁部には、手摺り１４が設けられている。また、この歩廊１３の上には、高架水槽４およびこの高架水槽４を点検するための点検歩廊１５が設置されている。 BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the following description of the embodiments, the same components are denoted by the same reference numerals, and the description thereof will be omitted or simplified.
[First embodiment]
FIG. 1 is a side view of an elevated water tank facility 1 dismantled by a steel tower dismantling method according to a first embodiment of the present invention.
The elevated water tank facility 1 includes a pump room 2 provided on the ground surface G, a steel tower 3 erected on the pump room 2, and an elevated water tank 4 arranged on the top of the steel tower 3.
The steel tower 3 has a truss shape, and includes four cylindrical struts 10, horizontal members 11 as a plurality of connecting members that extend substantially horizontally and connect the struts 10 to each other, and diagonally extend parallel to the struts 10. and a plurality of diagonal members 12 connecting with the central portion of the member 11 .
A corridor 13 as a connecting member is provided at the top of the steel tower 3 , and a handrail 14 is provided along the periphery of the corridor 13 . Above the corridor 13, an elevated water tank 4 and an inspection corridor 15 for inspecting the elevated water tank 4 are installed.

以下、高架水槽施設１を解体する手順について、図２のフローチャートを参照しながら説明する。
ステップＳ１では、図３に示すように、作業員の安全を確保するため、水平ネット２０を取り付ける。具体的には、水平ネット２０は、歩廊１３の直下に位置する最上段の水平材１１の高さ位置に設けられ、歩廊１３の外側まで張り出している。
ステップＳ２では、図３に示すように、揚重機Ｌ１により、手摺り１４および点検歩廊１５を吊り上げて撤去する。ここで、手摺り１４は、ステップＳ４において鉄塔３をワイヤ２２で吊り上げて横倒しにする際に、このワイヤ２２に干渉する範囲のみ撤去する。また、点検歩廊１５は、ワイヤ２２の取り付けやワイヤ２２による吊り上げに干渉する範囲のみ撤去する。 The procedure for dismantling the elevated water tank facility 1 will be described below with reference to the flowchart of FIG.
In step S1, as shown in FIG. 3, a horizontal net 20 is attached to ensure the safety of workers. Specifically, the horizontal net 20 is provided at the height position of the uppermost horizontal member 11 located directly under the corridor 13 and extends to the outside of the corridor 13 .
In step S2, as shown in FIG. 3, the handrail 14 and the inspection corridor 15 are lifted and removed by the lifting machine L1. Here, the handrail 14 is removed only in a range that interferes with the wire 22 when the steel tower 3 is lifted by the wire 22 and laid down in step S4. Also, the inspection corridor 15 is removed only in a range that interferes with the attachment of the wire 22 and the lifting by the wire 22. - 特許庁

ステップＳ３では、図４に示すように、揚重機Ｌ１により、高架水槽４を吊り上げて撤去する。
ステップＳ４では、鉄塔３を横倒しにして解体する。
ステップＳ５では、ポンプ室２を解体する。 In step S3, as shown in FIG. 4, the elevated water tank 4 is lifted and removed by the lifting machine L1.
In step S4, the steel tower 3 is laid down and dismantled.
In step S5, the pump chamber 2 is dismantled.

以下、このステップＳ４について、図５のフローチャートを参照しながら説明する。
ステップＳ４１では、図６に示すように、鉄塔３の各支柱１０について、歩廊１３の下側の位置に吊り冶具３０を取り付ける。
吊り治具３０は、図７に示すように、互いに分離されて鉄塔３の支柱１０を挟んで配置された一対の挟持体３１と、挟持体３１同士を締結する締結具としてのボルト３２およびナット３３と、を備える。 This step S4 will be described below with reference to the flowchart of FIG.
In step S41, as shown in FIG. 6, a hanging jig 30 is attached to each post 10 of the steel tower 3 at a position below the corridor 13. As shown in FIG.
As shown in FIG. 7, the hoisting jig 30 includes a pair of clamping bodies 31 separated from each other and arranged to sandwich the strut 10 of the steel tower 3, and a bolt 32 and a nut as fasteners for clamping the clamping bodies 31 together. 33 and.

一対の挟持体３１は、それぞれ、半円筒形状の本体４０と、本体４０の水平方向両端から外側に延びる板状の一対の平板部４１と、本体４０の上下端の外周面に沿って設けられる半円環状の補剛部４２と、を備える。平板部４１には、図示しない貫通孔が複数形成され、挟持体３１の平板部４１同士を合わせた状態で、平板部４１の貫通孔にボルト３２を挿通してナット３３を締め付けることで、挟持体３１同士が連結される。
また、一対の挟持体３１の一方には、吊りピース４３が設けられている。この吊りピース４３には、貫通孔４４が設けられ、この貫通孔４４には、シャックル２１を介してワイヤ２２が連結される。 The pair of clamping bodies 31 are provided along the outer peripheral surfaces of the main body 40, which has a semi-cylindrical shape, the pair of plate-like flat portions 41 extending outward from both horizontal ends of the main body 40, and the upper and lower ends of the main body 40, respectively. and a semi-annular stiffening portion 42 . A plurality of through holes (not shown) are formed in the flat plate portion 41. With the flat plate portions 41 of the holding member 31 aligned, the bolts 32 are inserted through the through holes of the flat plate portion 41 and the nuts 33 are tightened to hold the flat plate portion 41. The bodies 31 are connected together.
A suspension piece 43 is provided on one of the pair of clamping bodies 31 . A through hole 44 is provided in the suspension piece 43 , and the wire 22 is connected to the through hole 44 via the shackle 21 .

ステップＳ４２では、図８に示すように、揚重機Ｌ１により、吊り冶具３０に連結したワイヤ２２を吊り上げて鉄塔３を吊り下げ支持し、この状態で、鉄塔３の下端側を切断して、鉄塔３をポンプ室２から切り離す。
ステップＳ４３では、図９に示すように、別の揚重機Ｌ２により鉄塔３の下端側を吊り上げて、２台の揚重機Ｌ１、Ｌ２により、鉄塔３を相吊りして地表面Ｇに横倒しして載置する。このとき、チェーンエコライザ２３を用いて、ワイヤ２２を良好なバランスに維持する。
ステップＳ４４では、図１０に示すように、図示しない解体重機により、横倒しにした鉄塔３を長さ方向に適宜分割して撤去する。 In step S42, as shown in FIG. 8, the wire 22 connected to the lifting jig 30 is lifted by the lifting machine L1 to suspend and support the steel tower 3. In this state, the lower end side of the steel tower 3 is cut, and the steel tower 3 is disconnected from the pump chamber 2;
In step S43, as shown in FIG. 9, another heavy lifting machine L2 lifts the lower end of the steel tower 3, and two heavy lifting machines L1 and L2 lift the steel tower 3 sideways to the ground surface G. Place. At this time, the chain equalizer 23 is used to keep the wire 22 in good balance.
In step S44, as shown in FIG. 10, the overturned steel tower 3 is appropriately divided in the length direction and removed by a dismantling machine (not shown).

本実施形態によれば、以下のような効果がある。
（１）鉄塔３の支柱１０に一対の挟持体３１を配置し、ボルト３２およびナット３３によりこの挟持体３１同士を連結する。次に、吊りピース４３にワイヤ２２を連結して、このワイヤ２２を揚重機Ｌ１で吊り上げる。これにより、鉄塔３を確実かつ安全に吊り上げることができる。 According to this embodiment, there are the following effects.
(1) A pair of clamping bodies 31 are arranged on the column 10 of the steel tower 3, and the clamping bodies 31 are connected to each other by bolts 32 and nuts 33. Next, the wire 22 is connected to the hanging piece 43, and the wire 22 is lifted by the lifting machine L1. As a result, the steel tower 3 can be lifted reliably and safely.

（２）挟持体３１を構成する本体４０の外周面に補剛部４２を設けたので、挟持体３１の剛性が向上する。よって、吊り冶具３０を使用して、鉄塔３を確実に吊り上げることができる。
（３）吊り冶具３０を使用して鉄塔３を吊り下げ支持した状態で、鉄塔３の下端側を切断して、この切断した鉄塔３を地表面Ｇに横倒して載置し、その後、この横倒しした鉄塔３を分割して解体するので、鉄塔３を短時間で解体できる。 (2) Since the stiffening portion 42 is provided on the outer peripheral surface of the main body 40 constituting the holding body 31, the rigidity of the holding body 31 is improved. Therefore, the pylon 3 can be reliably hoisted using the hoisting jig 30 .
(3) In a state in which the steel tower 3 is suspended and supported using the suspension jig 30, the lower end side of the steel tower 3 is cut, and the cut steel tower 3 is placed sideways on the ground surface G, and then laid sideways. Since the steel tower 3 is divided and dismantled, the steel tower 3 can be dismantled in a short time.

（４）鉄塔３の外周に大掛かりな外部足場を組み立てることなく、鉄塔３の支柱１０の上部に吊り冶具３０を設置し、揚重機を使用して鉄塔３を吊り下げた状態で、鉄塔３を容易に切り離すことが出来る。よって、外部足場の組立て・解体作業や、足場上での支柱の切断作業などが不要となり、短期間で鉄塔３の解体が可能である。
（５）吊り冶具３０を、支柱１０同士の間に架設された歩廊１３の直下の位置に設置した。よって、揚重機Ｌ１により吊り冶具３０に取り付けたワイヤ２２を引っ張り上げた際には、吊り冶具３０が歩廊１３に係止するため、確実に支柱１０を吊り下げることができる。 (4) Without assembling a large-scale external scaffolding on the outer periphery of the steel tower 3, the lifting jig 30 is installed on the upper part of the support 10 of the steel tower 3, and the steel tower 3 is suspended in a state where the steel tower 3 is suspended using a lifting machine. Can be separated easily. Therefore, there is no need to assemble and dismantle external scaffolds, or to cut posts on scaffolds, and the steel tower 3 can be dismantled in a short period of time.
(5) The suspension jig 30 was installed at a position immediately below the corridor 13 constructed between the pillars 10 . Therefore, when the wire 22 attached to the hoisting jig 30 is pulled up by the hoisting machine L1, the hoisting jig 30 is engaged with the corridor 13, so that the column 10 can be reliably hung.

〔第２実施形態〕
本実施形態では、図１１に示すように、吊り治具３０の一対の挟持体３１Ａの一端側同士を丁番３４で連結した点が、第１実施形態と異なる。具体的には、挟持体３１Ａの本体４０の一端側は、平板部が設けられておらず、丁番３４により開閉可能に連結されており、挟持体３１Ａの他端側のみに平板部４１が設けられて、ボルト３２およびナット３３で連結される。
本実施形態によれば、上述の（１）～（５）の効果に加えて、以下のような効果がある。
（６）吊り冶具３０を構成する一対の挟持体３１Ａ同士を丁番３４で連結したので、鉄塔３の支柱１０に吊り冶具３０を取り付ける際に、支柱１０に挟持体３１Ａで比較的容易に挟み込むことができ、挟持体３１Ａの落下を防止できる。 [Second embodiment]
As shown in FIG. 11, this embodiment differs from the first embodiment in that one end sides of a pair of clamping bodies 31A of a hanging jig 30 are connected to each other by hinges 34. As shown in FIG. Specifically, one end side of the main body 40 of the clamping body 31A is not provided with a flat plate portion, but is connected by a hinge 34 so as to be openable and closable, and the flat plate portion 41 is provided only on the other end side of the clamping body 31A. provided and connected with bolts 32 and nuts 33 .
According to this embodiment, in addition to the effects (1) to (5) described above, the following effects are obtained.
(6) Since the pair of clamping bodies 31A constituting the suspension jig 30 are connected to each other by the hinge 34, when the suspension jig 30 is attached to the support 10 of the steel tower 3, the clamping bodies 31A can be relatively easily sandwiched between the support 10 and the support 31A. It is possible to prevent the holding member 31A from falling.

なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、上述の各実施形態では、吊り冶具３０の挟持体３１、３１Ａを、直接、鉄塔３の支柱１０に取り付けたが、これに限らず、挟持体３１、３１Ａと支柱１０との間に、硬質ゴムを挟み込んでもよい。
また、上述の各実施形態では、支柱１０を円筒状としたが、これに限らず、支柱１０を山形鋼や溝形鋼などの一般形鋼や角形鋼管で形成してもよい。この場合、支柱の断面形状に応じて、吊り冶具の挟持体の形状を適宜変更する。
また、上述の各実施形態では、ステップＳ４２において、鉄塔３を吊り下げ支持した状態で、鉄塔３の下端部を一度で切断したが、これに限らない。すなわち、鉄塔が高い場合には、一旦、鉄塔の外周の建物躯体上や仮設構台上に揚重機を設置し、この揚重機を用いて鉄塔を吊り下げ支持した状態で、鉄塔を上側から下側に向かって複数回に分けて切断してもよい。 It should be noted that the present invention is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present invention.
For example, in each of the above-described embodiments, the clamping bodies 31 and 31A of the suspension jig 30 are directly attached to the support column 10 of the steel tower 3. Hard rubber may be sandwiched.
Further, in each of the above-described embodiments, the support 10 is cylindrical, but the support 10 is not limited to this, and may be formed of general shaped steel such as angle steel or channel steel, or rectangular steel pipe. In this case, the shape of the holding member of the suspension jig is appropriately changed according to the cross-sectional shape of the column.
Further, in each of the above-described embodiments, in step S42, the lower end portion of the steel tower 3 is cut at once while the steel tower 3 is suspended and supported, but the present invention is not limited to this. In other words, when the steel tower is high, once a lifting machine is installed on the building frame or temporary gantry around the steel tower, and the steel tower is suspended from the top to the bottom while using this lifting machine to support the steel tower. You may cut|disconnect in multiple times toward .

Ｇ…地表面 Ｌ１、Ｌ２…揚重機
１…高架水槽施設 ２…ポンプ室 ３…鉄塔 ４…高架水槽
１０…支柱 １１…水平材（連結材） １２…斜材
１３…歩廊（連結材） １４…手摺り １５…点検歩廊
２０…水平ネット ２１…シャックル ２２…ワイヤ ２３…チェーンエコライザ
３０…吊り冶具 ３１、３１Ａ…挟持体 ３２…ボルト（締結具）
３３…ナット（締結具）
４０…本体 ４１…平板部 ４２…補剛部 ４３…吊りピース ４４…貫通孔 G... Ground surface L1, L2... Lifting machine 1... Elevated water tank facility 2... Pump room 3... Steel tower 4... Elevated water tank 10... Post 11... Horizontal member (connecting member) 12... Diagonal member 13... Corridor (connecting member) 14... Handrail 15 Inspection corridor 20 Horizontal net 21 Shackle 22 Wire 23 Chain equalizer 30 Hanging jig 31, 31A Clamping body 32 Bolt (fastener)
33 ... Nut (fastener)
DESCRIPTION OF SYMBOLS 40... Main body 41... Flat plate part 42... Stiffening part 43... Hanging piece 44... Through hole

Claims (2)

鉄塔を吊り上げるための吊り冶具であって、
前記鉄塔の支柱を挟んで配置された一対の挟持体と、
当該挟持体同士を連結する締結具と、を備え、
前記一対の挟持体は、それぞれ、半円筒形状の本体と、当該本体から外側に延びる平板部と、前記本体の外周面に沿って設けられる半円環状の補剛部と、を備え、
前記一対の挟持体のうち少なくとも一方の前記本体には、前記支柱の軸方向に沿って環状の吊りピースが設けられることを特徴とする吊り冶具。 A lifting jig for lifting a steel tower,
a pair of sandwiching bodies arranged to sandwich the pillars of the steel tower;
and a fastener that connects the clamping bodies together,
Each of the pair of holding bodies includes a semi-cylindrical main body, a flat plate portion extending outward from the main body, and a semi-circular stiffening portion provided along the outer peripheral surface of the main body,
A suspension jig , wherein the main body of at least one of the pair of holding bodies is provided with an annular suspension piece along the axial direction of the column. 請求項１に記載の吊り冶具を用いて、複数の支柱を有する鉄塔を解体する方法であって、
前記鉄塔の支柱の上部に前記吊り冶具を取り付ける工程と、
第１の揚重機により、前記吊り冶具の吊りピースに取り付けたワイヤを介して前記鉄塔を吊り下げ支持し、この状態で、前記鉄塔の下端側を切断する工程と、
前記第１の揚重機により前記支柱の上端側を吊り上げるとともに、第２の揚重機により前記支柱の下端側を吊り上げて、前記切断した鉄塔を地表面に横倒しして載置する工程と、
当該横倒しした鉄塔を分割する工程と、を含むことを特徴とする鉄塔の解体方法。 A method for dismantling a steel tower having a plurality of pillars using the lifting jig according to claim 1, comprising:
A step of attaching the suspension jig to the upper part of the support of the steel tower;
a step of suspending and supporting the pylon by means of a first lifting machine via wires attached to the hoisting pieces of the hoisting jig, and cutting the lower end side of the pylon in this state;
A step of lifting the upper end side of the support with the first lifting machine, lifting the lower end side of the support with the second lifting machine, and laying the cut steel tower on the ground surface;
and a step of dividing the overturned steel tower.
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