JP6893188B2 - Demolition system and demolition method of existing structures - Google Patents

Demolition system and demolition method of existing structures Download PDF

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JP6893188B2
JP6893188B2 JP2018043663A JP2018043663A JP6893188B2 JP 6893188 B2 JP6893188 B2 JP 6893188B2 JP 2018043663 A JP2018043663 A JP 2018043663A JP 2018043663 A JP2018043663 A JP 2018043663A JP 6893188 B2 JP6893188 B2 JP 6893188B2
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installation floor
crane installation
crane
floor
support
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JP2019157441A (en
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英樹 市原
英樹 市原
清志 矢島
清志 矢島
栄一 久松
栄一 久松
泰彦 猫本
泰彦 猫本
誠 萱嶋
誠 萱嶋
裕介 野口
裕介 野口
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Taisei Corp
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Description

本発明は、既存構造物を解体する解体システムおよび解体方法に関する。 The present invention relates to a dismantling system and a dismantling method for dismantling an existing structure.

従来より、設備や躯体の老朽化を理由として、既存建物の解体が行われるが、この既存建物を解体する方法としては、以下のような方法がある。
例えば、地表面から既存建物に沿ってマストを設置し、このマストにタワークレーンを取り付けて、このタワークレーンにより解体材を荷下ろしする方法がある。この場合、マストを既存建物の構造体に仮固定しておき、建物の解体に伴って、リフトダウンさせる（特許文献１参照）。 Conventionally, existing buildings have been demolished due to the deterioration of equipment and skeletons. There are the following methods for demolishing existing buildings.
For example, there is a method in which a mast is installed from the ground surface along an existing building, a tower crane is attached to the mast, and the demolition material is unloaded by the tower crane. In this case, the mast is temporarily fixed to the structure of the existing building and lifted down as the building is demolished (see Patent Document 1).

しかしながら、地表面から既存建物に沿ってタワークレーンを用いた場合では、地表面から最上階まで大型のマストを構築する必要があるため、解体工事が大掛かりとなって、施工費用が増大する、という問題があった。 However, when a tower crane is used from the ground surface to the existing building, it is necessary to build a large mast from the ground surface to the top floor, so the demolition work becomes large and the construction cost increases. There was a problem.

この問題を解決するため、以下の特許文献２のような解体方法が提案されている。すなわち、既存建物の屋上階の既存床の一部を含んでクレーン設置床とし、このクレーン設置床上にクレーンを設置するとともに、このクレーン設置床を既存柱である支持柱に仮支持させる。そして、クレーンを用いて既存建物を解体しながら、クレーン設置床を支持柱に沿って下降させる。 In order to solve this problem, a dismantling method as described in Patent Document 2 below has been proposed. That is, a part of the existing floor on the rooftop floor of the existing building is included as the crane installation floor, the crane is installed on the crane installation floor, and the crane installation floor is temporarily supported by the support pillar which is the existing pillar. Then, while dismantling the existing building using a crane, the crane installation floor is lowered along the support columns.

特開２０１０−２５５３７４号公報JP-A-2010-255374 特開２０１６−１７２９１号公報Japanese Unexamined Patent Publication No. 2016-17291

しかしながら、既存床の一部を利用してクレーン設置床を構築するため、大掛かりな補強が必要であり、施工費用が増大する、という問題があった。 However, since a crane installation floor is constructed using a part of the existing floor, there is a problem that large-scale reinforcement is required and the construction cost increases.

本発明は、施工費用を低減できる既存構造物の解体システムおよび解体方法を提供することを目的とする。 An object of the present invention is to provide a dismantling system and a dismantling method of an existing structure capable of reducing construction costs.

請求項１に記載の既存構造物の解体システムは、既存構造物（例えば、後述の既存建物１）を解体する解体システム（例えば、後述の解体システム２）であって、既存構造物の所定のフロアの上に構築されて当該フロアを覆うクレーン設置床（例えば、後述のクレーン設置床２０）と、当該クレーン設置床の中央部を支持する既存柱である支持柱（例えば、後述の支持柱１１Ａ）と、前記クレーン設置床に設置されたクレーン（例えば、後述のクレーン２１）と、前記クレーン設置床を前記支持柱に沿って下降させる昇降装置（例えば、後述の昇降装置２２）と、前記既存構造物を囲んで地表面に架設された外部足場（例えば、後述の外部足場２５）と、を備え、前記クレーン設置床には、当該クレーン設置床の中央部側から両端側を吊り下げ支持する吊り架構（例えば、後述の吊り架構３５）が設けられることを特徴とする。 The dismantling system for an existing structure according to claim 1 is a dismantling system (for example, a dismantling system 2 described later) for dismantling an existing structure (for example, an existing building 1 described later), and is a predetermined of the existing structure. A crane installation floor constructed on the floor and covering the floor (for example, the crane installation floor 20 described later) and a support pillar (for example, the support pillar 11A described later) which is an existing pillar supporting the central portion of the crane installation floor. ), A crane installed on the crane installation floor (for example, a crane 21 described later), an elevating device for lowering the crane installation floor along the support column (for example, an elevating device 22 described later), and the existing one. An external scaffold (for example, an external scaffold 25 described later) erected on the ground surface surrounding the structure is provided, and both ends of the crane installation floor are suspended and supported from the central portion side of the crane installation floor. It is characterized in that a crane structure (for example, a crane structure 35 described later) is provided.

この発明によれば、既存構造物を囲む外部足場を地表面に架設するとともに、既存構造物の解体対象となるフロアを覆うクレーン設置床を構築した。ここで、既存構造物の一部の既存柱を支持柱とし、この支持柱にクレーン設置床の中央部を仮支持させるとともに、クレーン設置床の中央部側から両端側を吊り下げ支持する吊り架構を設けた。そして、クレーン設置床に設置したクレーンにより既存構造物を上層から解体しながら、昇降装置によりクレーン設置床を支持柱に沿って下降させた。
よって、従来のようにクレーン設置床に既存床の一部を利用しないので、大掛かりな補強が不要となり、施工費用を削減できる。
また、解体対象となるフロアの側面を外部足場で囲むとともに、上面をクレーン設置床で覆ったので、解体工事で発生する粉塵が飛散したり騒音が外部に漏れたりするのを防止できる。
また、吊り架構によりクレーン設置床の中央部側から両端側を吊り下げ支持したので、クレーン設置床の面積が広い場合でも、クレーン設置床の中央部のみを支持柱で仮支持すればよいので、昇降装置の設置台数を増やす必要がなく、施工費用が増大するのを抑制できる。 According to the present invention, an external scaffold surrounding the existing structure is erected on the ground surface, and a crane installation floor covering the floor to be dismantled of the existing structure is constructed. Here, a part of the existing pillars of the existing structure are used as support pillars, and the support pillars temporarily support the central part of the crane installation floor and suspend and support both ends from the central part side of the crane installation floor. Was provided. Then, while dismantling the existing structure from the upper layer by the crane installed on the crane installation floor, the crane installation floor was lowered along the support pillar by the elevating device.
Therefore, unlike the conventional case, a part of the existing floor is not used for the crane installation floor, so that large-scale reinforcement is not required and the construction cost can be reduced.
In addition, since the side surface of the floor to be dismantled is surrounded by an external scaffold and the upper surface is covered with the floor on which the crane is installed, it is possible to prevent dust generated during the demolition work from scattering and noise from leaking to the outside.
In addition, since the crane installation floor is suspended and supported from the center side to both ends by the suspension frame, even if the area of the crane installation floor is large, only the center part of the crane installation floor needs to be temporarily supported by the support columns. It is not necessary to increase the number of lifting devices installed, and it is possible to suppress an increase in construction costs.

請求項２に記載の既存構造物の解体システムは、前記吊り架構は、前記クレーン設置床の中央部に立設された吊り支柱（例えば、後述の吊り支柱３６）と、当該吊り支柱の頂部に架設されて両端が前記クレーン設置床の両端側に連結された吊りケーブル（例えば、後述の吊りケーブル３７）と、を備えることを特徴とする。 In the dismantling system of the existing structure according to claim 2, the suspension frame is attached to a suspension column (for example, a suspension column 36 described later) erected at the center of the crane installation floor and the top of the suspension column. It is characterized by including a suspension cable (for example, a suspension cable 37 described later) that is erected and both ends are connected to both ends of the crane installation floor.

この発明によれば、吊り支柱と吊りケーブルとを含んで吊り架構を構成したので、簡易な構成で吊り架構を実現でき、低コストとなる。 According to the present invention, since the suspension frame is configured by including the suspension support and the suspension cable, the suspension frame can be realized with a simple configuration and the cost is low.

請求項３に記載の既存構造物の解体システムは、前記クレーン設置床には、当該クレーン設置床の外周に沿ってガイドフレーム（例えば、後述のガイドフレーム３３）が設けられ、前記外部足場には、前記ガイドフレームの側面に当接して当該ガイドフレームの下降を案内するガイド部材（例えば、後述のガイド部材３８）が設けられることを特徴とする。 In the dismantling system of the existing structure according to claim 3, a guide frame (for example, a guide frame 33 described later) is provided on the crane installation floor along the outer periphery of the crane installation floor, and the external scaffolding is provided with a guide frame (for example, a guide frame 33 described later). A guide member (for example, a guide member 38 described later) that comes into contact with the side surface of the guide frame and guides the lowering of the guide frame is provided.

この発明によれば、クレーン設置床の外周にガイドフレームを設けるとともに、外部足場にガイドフレームの下降を案内するガイド部材を設けた。よって、クレーン設置床を支持柱に沿って下降させると、クレーン設置床とともにガイドフレームも下降するが、このとき、外部足場に設けたガイド部材によりガイドフレームの下降を案内するので、クレーン設置床の円滑な移動を確保できる。 According to the present invention, a guide frame is provided on the outer periphery of the crane installation floor, and a guide member for guiding the descent of the guide frame is provided on the external scaffold. Therefore, when the crane installation floor is lowered along the support pillar, the guide frame is also lowered together with the crane installation floor. At this time, the guide member provided on the external scaffolding guides the lowering of the guide frame, so that the crane installation floor is lowered. Smooth movement can be ensured.

請求項４に記載の既存構造物の解体システムは、前記昇降装置は、前記支持柱の上端に取り付けられて略水平に延びてかつ両端側に回転自在に設けられた一対の滑車（例えば、後述の滑車６４）を有する反力部材（例えば、後述の反力部材４１）と、当該反力部材の滑車に巻かれて一端側が前記クレーン設置床に連結された吊り材（例えば、後述の吊り材４２）と、前記クレーン設置床に設けられて前記吊り材の他端側を引っ張る昇降ジャッキ（例えば、後述のストランドジャッキ４３）と、をさらに備えることを特徴とする。 In the dismantling system of the existing structure according to claim 4, the lifting device is attached to the upper end of the support column, extends substantially horizontally, and is rotatably provided on both ends (for example, described later). A reaction force member (for example, a reaction force member 41 described later) having the pulley 64) and a suspension material (for example, a suspension member described later) wound around the pulley of the reaction force member and one end of which is connected to the crane installation floor. 42) and an elevating jack (for example, a strand jack 43 described later) provided on the floor where the crane is installed and pulling the other end side of the suspension member are further provided.

この発明によれば、昇降装置を、反力部材、吊り材、および昇降ジャッキを含んで構成し、吊り材を反力部材の滑車に巻いて、この吊り材の一端側をクレーン設置床に連結し、吊り材の他端側を昇降ジャッキに連結した。よって、昇降ジャッキにより吊り材を引っ張ることで、クレーン設置床が支持柱に対して上昇し、昇降ジャッキにより吊り材を送り出すことで、クレーン設置床が支持柱に対して下降する。したがって、反力部材の滑車を利用することで、単一の昇降ジャッキでクレーン設置床を昇降できるので、施工コストを削減できる。 According to the present invention, the elevating device is configured to include a reaction force member, a suspension member, and an elevating jack, the suspension member is wound around a pulley of the reaction force member, and one end side of the suspension member is connected to a crane installation floor. Then, the other end side of the hanging material was connected to the elevating jack. Therefore, by pulling the suspension material with the elevating jack, the crane installation floor rises with respect to the support pillar, and by sending out the suspension material with the elevating jack, the crane installation floor descends with respect to the support pillar. Therefore, by using the pulley of the reaction force member, the crane installation floor can be raised and lowered with a single lifting jack, so that the construction cost can be reduced.

請求項５に記載の既存構造物の解体方法は、既存構造物（例えば、後述の既存建物１）を解体する解体方法であって、当該既存構造物の所定の既存柱を支持柱（例えば、後述の支持柱１１Ａ）とし、当該支持柱に仮支持させて前記既存構造物の所定のフロア上に当該フロアを覆うクレーン設置床（例えば、後述のクレーン設置床２０）を構築し、このとき、前記支持柱により前記クレーン設置床の中央部を支持し、前記クレーン設置床に当該クレーン設置床の中央部側から両端側を吊り下げ支持する吊り架構（例えば、後述の吊り架構３５）を設け、さらに、当該クレーン設置床にクレーン（例えば、後述のクレーン２１）を設置するとともに、前記既存構造物を囲む外部足場（例えば、後述の外部足場２５）を地表面に架設する第１工程（例えば、後述のステップＳ１）と、前記クレーンを用いて、少なくとも前記支持柱を残して前記所定のフロアから１層分を解体する第２工程（例えば、後述のステップＳ２）と、前記支持柱による前記クレーン設置床の仮支持を解除し、前記クレーン設置床を前記支持柱に沿って１層分下降させて、その後、当該前記クレーン設置床を前記支持柱に再度仮支持させる第３工程（例えば、後述のステップＳ３〜Ｓ５）と、前記外部足場の上部を解体するとともに、前記支持柱の上部を撤去する第４工程（例えば、後述のステップＳ６〜Ｓ９）と、前記第２工程から第４工程までを繰り返す第５工程（例えば、後述のステップＳ１０）と、を備えることを特徴とする。 The method for dismantling an existing structure according to claim 5 is a method for dismantling an existing structure (for example, an existing building 1 described later), and supports a predetermined existing pillar of the existing structure (for example, for example). A support pillar 11A), which will be described later, is used, and a crane installation floor (for example, the crane installation floor 20, which will be described later) is constructed on a predetermined floor of the existing structure by temporarily supporting the support pillar. A suspension structure (for example, a suspension structure 35 described later) is provided on the crane installation floor by supporting the central portion of the crane installation floor with the support pillars and suspending and supporting both ends from the central portion side of the crane installation floor. Further, a first step (for example,) in which a crane (for example, a crane 21 described later) is installed on the floor where the crane is installed and an external pillar (for example, an external pillar 25 described later) surrounding the existing structure is erected on the ground surface. Step S1) described later, a second step (for example, step S2 described later) of using the crane to disassemble one layer from the predetermined floor while leaving at least the support pillars, and the crane using the support pillars. A third step (for example, described later) in which the temporary support of the installation floor is released, the crane installation floor is lowered by one layer along the support pillar, and then the crane installation floor is temporarily supported by the support pillar again (for example, described later). Steps S3 to S5), the fourth step of disassembling the upper part of the external scaffold and removing the upper part of the support pillar (for example, steps S6 to S9 described later), and the second to fourth steps. A fifth step (for example, step S10 described later), which repeats the above steps, is provided.

この発明によれば、上述の請求項１と同様の効果がある。 According to the present invention, the same effect as that of claim 1 described above is obtained.

本発明によれば、大掛かりな補強が不要となり、施工費用を削減できる。 According to the present invention, large-scale reinforcement is not required, and the construction cost can be reduced.

本発明の一実施形態に係る既存構造物の解体方法が適用される既存建物およびこの解体方法に用いられる解体システムの縦断面図である。It is a vertical cross-sectional view of an existing building to which the method of dismantling an existing structure according to one embodiment of the present invention is applied, and the dismantling system used in this method of dismantling. 前記実施形態に係る解体システムの平面図である。It is a top view of the dismantling system which concerns on the said Embodiment. 図１のＩ−Ｉ断面図である。FIG. 1 is a cross-sectional view taken along the line II of FIG. 図２および図３のＩＩ−ＩＩ断面図である。It is a cross-sectional view of II-II of FIG. 2 and FIG. 図２および図３のＩＩＩ−ＩＩＩ断面図である。2 is a sectional view taken along line III-III of FIGS. 2 and 3. FIG. 図２および図３のＩＶ−ＩＶ断面図である。FIG. 2 is a sectional view taken along line IV-IV of FIGS. 2 and 3. 図２の破線Ａで囲んだ部分の平面図である。It is a top view of the part surrounded by the broken line A of FIG. 図７のＶ１−ＶＩ矢視図である。FIG. 7 is a view taken along the line V1-VI of FIG. 図７のＶＩＩ−ＶＩＩ矢視図である。FIG. 7 is a view taken along the line VII-VII of FIG. 図８および図９のＶＩＩＩ−ＶＩＩＩ断面図である。8 is a cross-sectional view taken along the line VIII-VIII of FIGS. 8 and 9. 図８および図９のＩＸ−ＩＸ断面図である。8 is a cross-sectional view taken along the line IX-IX of FIGS. 8 and 9. 図２の破線Ａで囲んだ部分のイメージ図である。It is an image figure of the part surrounded by the broken line A of FIG. 前記実施形態に係る解体方法に用いられる解体システムの昇降装置の動作を示す模式図である。It is a schematic diagram which shows the operation of the lifting device of the dismantling system used in the dismantling method which concerns on the said Embodiment. 前記実施形態に係る解体システムのストランドジャッキの先端面および滑車の平面図である。It is a top view of the tip surface and the pulley of the strand jack of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体システムのボックス部材の異なる２方向の縦断面図である。It is a vertical sectional view in two different directions of the box member of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体システムの仮固定ジャッキの動作を示す図である。It is a figure which shows the operation of the temporary fixing jack of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体システムの係止装置の動作を示す模式図（その１）である。It is a schematic diagram (the 1) which shows the operation of the locking device of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体システムの係止装置の動作を示す模式図（その２）である。It is a schematic diagram (No. 2) which shows the operation of the locking device of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体システムの振れ止め装置の平面図である。It is a top view of the steady rest device of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体システムの振れ止め装置の拡大平断面図である。It is an enlarged plan sectional view of the steady rest device of the dismantling system which concerns on the said embodiment. 前記実施形態に係る解体方法により既存建物を解体する手順のフローチャートである。It is a flowchart of the procedure of dismantling an existing building by the dismantling method which concerns on the said Embodiment. 前記実施形態に係る既存建物の解体手順の説明図（その１）である。It is explanatory drawing (the 1) of the dismantling procedure of the existing building which concerns on the said embodiment. 前記実施形態に係る既存建物の解体手順の説明図（その２）である。It is explanatory drawing (the 2) of the dismantling procedure of the existing building which concerns on the said embodiment. 前記実施形態に係る既存建物の解体手順の説明図（その３）である。It is explanatory drawing (the 3) of the dismantling procedure of the existing building which concerns on the said embodiment.

以下、本発明の一実施形態について、図面を参照しながら説明する。
図１は、本発明の一実施形態に係る既存構造物の解体方法が適用される既存構造物としての既存建物１およびこの解体方法に用いられる解体システム２の縦断面図である。図２は、解体システム２の平面図である。図３は、図１のＩ−Ｉ断面図である。図４は、図２および図３のＩＩ−ＩＩ断面図であり、図５は、図２および図３のＩＩＩ−ＩＩＩ断面図である。図６は、図２および図３のＩＶ−ＩＶ断面図である。なお、図１は、図２および図３のＶ−Ｖ断面図である。
既存建物１は、ｎ（ｎは自然数）階建ての建物であり、平面視で長方形状である。以下、この既存建物１の長手方向をＸ方向とし、このＸ方向に略直交する短手方向をＹ方向とする。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical sectional view of an existing building 1 as an existing structure to which the method of dismantling an existing structure according to an embodiment of the present invention is applied, and a dismantling system 2 used in this dismantling method. FIG. 2 is a plan view of the dismantling system 2. FIG. 3 is a cross-sectional view taken along the line II of FIG. 4 is a sectional view taken along line II-II of FIGS. 2 and 3, and FIG. 5 is a sectional view taken along line III-III of FIGS. 2 and 3. FIG. 6 is a sectional view taken along line IV-IV of FIGS. 2 and 3. Note that FIG. 1 is a sectional view taken along line VV of FIGS. 2 and 3.
The existing building 1 is an n (n is a natural number) floor building, and has a rectangular shape in a plan view. Hereinafter, the longitudinal direction of the existing building 1 will be referred to as the X direction, and the lateral direction substantially orthogonal to the X direction will be referred to as the Y direction.

既存建物１は、ラーメン構造であり、複数のボックス柱である既存柱１１と、複数の鉄骨造の既存梁１２と、鉄筋コンクリート造の既存床１３と、を備える。ここで、図３および図４に示すように、既存柱１１の一部を、クレーン設置床２０を支持する支持柱１１Ａ、１１Ｂとする。支持柱１１Ａは、既存建物１のＹ方向中央部の２列の既存柱である。支持柱１１Ｂは、Ｙ方向両端でかつＸ方向両端および略中央に位置する既存柱である。 The existing building 1 has a rigid frame structure, and includes an existing column 11 which is a plurality of box columns, a plurality of steel-framed existing beams 12, and an existing reinforced concrete floor 13. Here, as shown in FIGS. 3 and 4, a part of the existing pillars 11 is designated as support pillars 11A and 11B for supporting the crane installation floor 20. The support columns 11A are two rows of existing columns in the central part of the existing building 1 in the Y direction. The support column 11B is an existing column located at both ends in the Y direction and at both ends in the X direction and substantially in the center.

この既存建物１を、以下の仮設構造物である解体システム２を用いて解体する。
解体システム２は、既存建物１の屋上階の上に構築されたクレーン設置床２０と、クレーン設置床２０上に設置されたジブクレーンであるクレーン２１と、支持柱１１Ａに取り付けられてクレーン設置床２０を支持柱１１Ａに沿って下降させる昇降装置２２と、クレーン設置床２０に設けられて支持柱１１Ａ、１１Ｂの継手部１４の上面に係止可能な係止装置２３と、クレーン設置床２０が支持柱１１Ａ、１１Ｂに対して水平方向に揺れるのを防止する振れ止め装置２４と、既存建物１を囲んで地表面に架設された外部足場２５と、を備える。
つまり、支持柱１１Ａに対しては、昇降装置２２、係止装置２３、および振れ止め装置２４が設けられるが、支持柱１１Ｂに対しては、係止装置２３および振れ止め装置２４のみが設けられ、昇降装置２２は設けられていない。 The existing building 1 is dismantled using the dismantling system 2 which is the following temporary structure.
The dismantling system 2 includes a crane installation floor 20 constructed on the roof floor of the existing building 1, a crane 21 which is a jib crane installed on the crane installation floor 20, and a crane installation floor 20 attached to a support column 11A. Is supported by an elevating device 22 that lowers the crane along the support column 11A, a locking device 23 that is provided on the crane installation floor 20 and can be locked to the upper surface of the joint portion 14 of the support columns 11A and 11B, and the crane installation floor 20. It is provided with a steady rest device 24 for preventing the pillars 11A and 11B from swinging in the horizontal direction, and an external scaffold 25 erected on the ground surface surrounding the existing building 1.
That is, the support column 11A is provided with the elevating device 22, the locking device 23, and the steady rest device 24, but the support column 11B is provided with only the locking device 23 and the steady rest device 24. , The lifting device 22 is not provided.

クレーン設置床２０は、既存建物１の屋上階全体を覆うように構築されている。このクレーン設置床２０は、具体的には、昇降装置２２同士を複数のＨ形鋼の梁部材３１で連結して構成された平面視で矩形状の床フレーム３０と、床フレーム３０の外周に沿って設けられたトラス梁３２と、トラス梁３２に沿って所定間隔おきに立設されたガイドフレーム３３と、床フレーム３０の上に載置される覆工板である板状の床部材３４と、を備える。 The crane installation floor 20 is constructed so as to cover the entire rooftop floor of the existing building 1. Specifically, the crane installation floor 20 is formed on a floor frame 30 which is rectangular in a plan view and is formed by connecting the lifting devices 22 to each other by a plurality of H-shaped steel beam members 31, and on the outer periphery of the floor frame 30. A truss beam 32 provided along the truss beam 32, a guide frame 33 erected along the truss beam 32 at predetermined intervals, and a plate-shaped floor member 34 which is a lining plate placed on the floor frame 30. And.

図２に示すように、クレーン設置床２０の２箇所には、このクレーン設置床２０のＹ方向に延びる吊り架構３５が設けられている。吊り架構３５は、図６に示すように、クレーン設置床２０の中央部に立設された一対の吊り支柱３６と、これら一対の吊り支柱３６の頂部同士の間に架設されて両端がクレーン設置床２０の両端側に連結された吊りケーブル３７と、を備える。この吊り架構３５により、クレーン設置床２０のＹ方向の中央部は、クレーン設置床２０のＹ方向の両端側を吊り下げ支持している。 As shown in FIG. 2, suspension frames 35 extending in the Y direction of the crane installation floor 20 are provided at two locations on the crane installation floor 20. As shown in FIG. 6, the suspension frame 35 is erected between a pair of suspension columns 36 erected at the center of the crane installation floor 20 and the tops of the pair of suspension columns 36, and both ends are installed with a crane. Suspended cables 37 connected to both ends of the floor 20 are provided. With this suspension frame 35, the central portion of the crane installation floor 20 in the Y direction suspends and supports both ends of the crane installation floor 20 in the Y direction.

ガイドフレーム３３は、鉛直方向に延びる棒状の部材であり、トラス梁３２に固定されている。一方、外部足場２５には、クレーン設置床２０が下降する際に、ガイドフレーム３３の側面に当接してこのガイドフレーム３３の下降を案内するガイド部材３８が取り付けられている。 The guide frame 33 is a rod-shaped member extending in the vertical direction and is fixed to the truss beam 32. On the other hand, when the crane installation floor 20 descends, the external scaffold 25 is attached with a guide member 38 that comes into contact with the side surface of the guide frame 33 and guides the descending of the guide frame 33.

クレーン設置床２０の上には、Ｘ方向に延びるＨ形鋼である一対の走行レール９０が載置されている。
クレーン２１は、走行レール９０の上を走行する走行台車９１と、この走行台車９１に旋回可能に支持されたクレーン本体９２と、このクレーン本体９２に起伏可能に支持されたジブ９３と、このジブ９３の先端に吊り下げ支持された図示しないフックと、クレーン本体９２に設けられてフックを昇降させる巻上装置９４と、を備える。 A pair of traveling rails 90 made of H-shaped steel extending in the X direction are placed on the crane installation floor 20.
The crane 21 includes a traveling bogie 91 traveling on a traveling rail 90, a crane body 92 rotatably supported by the traveling bogie 91, a jib 93 undulatingly supported by the crane body 92, and the jib. A hook (not shown) suspended and supported at the tip of 93, and a hoisting device 94 provided on the crane body 92 for raising and lowering the hook are provided.

図７は、図２の破線Ａで囲んだ部分の平面図である。図８は、図７のＶＩ−ＶＩ矢視図であり、図９は、図７のＶＩＩ−ＶＩＩ矢視図である。図１０は、図８および図９のＶＩＩＩ−ＶＩＩＩ断面図であり、図１１は、図６および図７のＩＸ−ＩＸ断面図である。図１２は、図２の破線Ａで囲んだ部分のイメージ図である。 FIG. 7 is a plan view of the portion surrounded by the broken line A in FIG. FIG. 8 is a view taken along the line VI-VI of FIG. 7, and FIG. 9 is a view taken along the line VII-VII of FIG. 7. 10 is a sectional view taken along line VIII-VIII of FIGS. 8 and 9, and FIG. 11 is a sectional view taken along line IX-IX of FIGS. 6 and 7. FIG. 12 is an image diagram of a portion surrounded by a broken line A in FIG.

昇降装置２２は、支持柱１１Ａを囲んでクレーン設置床２０の一部となる矩形枠状のフレーム４０と、支持柱１１Ａの上端に取り付けられて略水平に延びる反力部材４１と、反力部材４１に巻かれて一端側がフレーム４０に連結された吊り材４２と、フレーム４０に設けられて吊り材４２の他端側を引っ張る昇降ジャッキとしてのストランドジャッキ４３と、を備える。 The elevating device 22 includes a rectangular frame-shaped frame 40 that surrounds the support column 11A and becomes a part of the crane installation floor 20, a reaction force member 41 that is attached to the upper end of the support column 11A and extends substantially horizontally, and a reaction force member. A suspension member 42 wound around a 41 and one end side connected to a frame 40, and a strand jack 43 as an elevating jack provided on the frame 40 and pulling the other end side of the suspension member 42 are provided.

フレーム４０は、矩形枠状の基部５０と、基部５０に回動可能に設けられた門型状のジャッキ支持部５１と、基部５０の支持柱１１Ａを挟んでジャッキ支持部５１の反対側の位置に回動可能に設けられた門型状の吊り材支持部５２と、を備える。 The frame 40 is located at a position opposite to the rectangular frame-shaped base portion 50, the gate-shaped jack support portion 51 rotatably provided on the base portion 50, and the jack support portion 51 with the support pillar 11A of the base portion 50 interposed therebetween. The gate-shaped suspension member support portion 52 provided so as to be rotatable is provided.

基部５０は、略平行にＸ方向に延びるＨ形鋼からなる一対の梁部材５３Ａと、この梁部材５３Ａ同士を連結して略平行にＹ方向に延びるＨ形鋼からなる一対の梁部材５３Ｂと、を備える。クレーン設置床２０の梁部材３１は、昇降装置２２のフレーム４０同士を連結しており、これら昇降装置２２の梁部材５３Ａ、５３Ｂ同士の接合部には、クレーン設置床２０の梁部材３１が連結されている。 The base 50 includes a pair of beam members 53A made of H-shaped steel extending substantially in parallel in the X direction, and a pair of beam members 53B made of H-shaped steel extending substantially parallel in the Y direction by connecting the beam members 53A to each other. , Equipped with. The beam member 31 of the crane installation floor 20 connects the frames 40 of the elevating device 22 to each other, and the beam member 31 of the crane installation floor 20 is connected to the joint between the beam members 53A and 53B of the elevating device 22. Has been done.

一方の梁部材５３Ａの上面には、ジャッキ支持部５１が回動可能に支持されており、他方の梁部材５３Ａの上面には、吊り材支持部５２が回動可能に支持されている。
ストランドジャッキ４３は、ジャッキ支持部５１に上向きに固定されている。
これら一対の梁部材５３Ａの下部には、この梁部材５３Ａの長さ方向に延びる挿通孔５４が形成されている。この挿通孔５４の下面には、複数のボルト挿通孔５５が梁部材５３Ａの長さ方向に並んで形成されている（図１９参照）。 The jack support portion 51 is rotatably supported on the upper surface of one beam member 53A, and the suspension member support portion 52 is rotatably supported on the upper surface of the other beam member 53A.
The strand jack 43 is fixed upward to the jack support portion 51.
An insertion hole 54 extending in the length direction of the beam member 53A is formed in the lower portion of the pair of beam members 53A. On the lower surface of the insertion hole 54, a plurality of bolt insertion holes 55 are formed side by side in the length direction of the beam member 53A (see FIG. 19).

反力部材４１は、支持柱１１Ａの上端に被せられて上端が塞がれた矩形筒状のボックス部材６０と、ボックス部材６０の上に設けられて略水平に延びる反力梁６１と、ボックス部材６０の内壁面に設けられてＨ形鋼である支持柱１１Ａの側面に当接可能な仮固定ジャッキ（ユニブロック）６２（図１５参照）と、を備える。 The reaction force member 41 includes a rectangular tubular box member 60 that covers the upper end of the support column 11A and the upper end is closed, a reaction force beam 61 that is provided on the box member 60 and extends substantially horizontally, and a box. A temporary fixing jack (uniblock) 62 (see FIG. 15) provided on the inner wall surface of the member 60 and capable of contacting the side surface of the support column 11A made of H-shaped steel is provided.

反力梁６１は、互いに略平行な一対の水平部材６３と、この一対の水平部材６３の両端側同士の間に回転自在に支持された一対の滑車６４と、を備える。
吊り材４２は、一対の滑車６４に巻かれており、一端側が吊り材支持部５２に連結され、他端側がジャッキ支持部５１に固定されたストランドジャッキ４３に連結されている。 The reaction beam 61 includes a pair of horizontal members 63 that are substantially parallel to each other, and a pair of pulleys 64 that are rotatably supported between both ends of the pair of horizontal members 63.
The suspension member 42 is wound around a pair of pulleys 64, one end side of which is connected to the suspension member support portion 52, and the other end side of which is connected to a strand jack 43 fixed to the jack support portion 51.

以上の昇降装置２２では、図１３（ａ）に示すように、ストランドジャッキ４３が吊り材４２を引っ張ると、クレーン設置床２０が支持柱１１Ａに対して上昇する。一方、図１３（ｂ）に示すように、ストランドジャッキ４３が吊り材４２を送り出すと、クレーン設置床２０が支持柱１１Ａに対して下降する。 In the above elevating device 22, when the strand jack 43 pulls the suspension member 42, the crane installation floor 20 rises with respect to the support pillar 11A, as shown in FIG. 13A. On the other hand, as shown in FIG. 13B, when the strand jack 43 sends out the suspension member 42, the crane installation floor 20 descends with respect to the support pillar 11A.

図１４（ａ）は、ストランドジャッキ４３の先端面（上端面）の平面図である。図１４（ｂ）は、滑車６４の平面図である。
ストランドジャッキ４３は、先端面が円形であり、例えば７本のストランドを引っ張ることが可能である。本実施形態では、図１４（ａ）に示すように、７本のストランドのうち、ストランドジャッキ４３の先端面の中心を通る一直線上に並ぶ３本のストランドのみを、吊り材４２として用いる。
滑車６４は、直径が同一のプーリ６５を３枚重ねて構成されており、ストランドジャッキ４３の３本のストランドとしての吊り材４２が巻かれている。 FIG. 14A is a plan view of the tip end surface (upper end surface) of the strand jack 43. FIG. 14B is a plan view of the pulley 64.
The strand jack 43 has a circular tip surface, and can pull, for example, seven strands. In the present embodiment, as shown in FIG. 14A, of the seven strands, only three strands aligned in a straight line passing through the center of the tip surface of the strand jack 43 are used as the suspending member 42.
The pulley 64 is formed by stacking three pulleys 65 having the same diameter, and a suspension member 42 as three strands of the strand jack 43 is wound around the pulley 64.

図１５は、ボックス部材６０の異なる２方向の縦断面図である。図１６は、仮固定ジャッキ６２の動作を示す図である。
仮固定ジャッキ６２は、ねじ６６を回転させることで伸縮し、水平方向の長さ寸法ｌ１を変更可能となっている。この仮固定ジャッキ６２では、ねじ６６は、仮固定ジャッキ６２の長さ方向の中央に位置する構造である。 FIG. 15 is a vertical cross-sectional view of the box member 60 in two different directions. FIG. 16 is a diagram showing the operation of the temporary fixing jack 62.
The temporary fixing jack 62 expands and contracts by rotating the screw 66, and the length dimension l 1 in the horizontal direction can be changed. In the temporary fixing jack 62, the screw 66 has a structure located at the center of the temporary fixing jack 62 in the length direction.

ボックス部材６０の側面には、水平方向に延びる長孔６７が形成されており、ねじ６６はこの長孔６７を貫通して外部に突出している。上述のように、ねじ６６が仮固定ジャッキ６２の長さ方向中央に位置するため、長孔６７を水平方向に延びる形状とすることで、仮固定ジャッキ６２の長さ寸法の変化に対応可能となっている。 An elongated hole 67 extending in the horizontal direction is formed on the side surface of the box member 60, and the screw 66 penetrates the elongated hole 67 and projects to the outside. As described above, since the screw 66 is located at the center of the temporary fixing jack 62 in the length direction, it is possible to respond to a change in the length dimension of the temporary fixing jack 62 by forming the elongated hole 67 in the horizontal direction. It has become.

ねじ６６の先端には、円盤状のハンドル６８が設けられている。このハンドル６８には、チェーン６９が巻かれて下方に垂れ下がっている。よって、ボックス部材６０の下方からチェーン６９を引っ張ってねじ６６を回転させることで、仮固定ジャッキ６２の長さ寸法を適宜調整できる。これにより、仮固定ジャッキ６２が支持柱１１Ａの側面に当接し、ボックス部材６０を支持柱１１Ａに仮固定できるようになっている。 A disk-shaped handle 68 is provided at the tip of the screw 66. A chain 69 is wound around the handle 68 and hangs downward. Therefore, by pulling the chain 69 from below the box member 60 and rotating the screw 66, the length dimension of the temporary fixing jack 62 can be appropriately adjusted. As a result, the temporary fixing jack 62 comes into contact with the side surface of the support pillar 11A, and the box member 60 can be temporarily fixed to the support pillar 11A.

図１７および図１８は、係止装置２３の動作を示す模式図である。
図８〜図１１にも示すように、係止装置２３は、一対のかんぬき梁７０と、この一対のかんぬき梁７０同士を接近あるいは離間させる方向に略水平に移動する一対の開閉機構７１Ａ、７１Ｂと、を備える。
支持柱１１Ａの互いに背中合わせの側面には、一対の継手部１４が側方に延びており、係止装置２３は、この一対の継手部１４の上面に一対のかんぬき梁７０を載せて係止させる。 17 and 18 are schematic views showing the operation of the locking device 23.
As shown in FIGS. 8 to 11, the locking device 23 is a pair of opening / closing mechanisms 71A and 71B that move substantially horizontally in a direction in which the pair of piercing beams 70 and the pair of piercing beams 70 approach or separate from each other. And.
A pair of joint portions 14 extend sideways on the back-to-back side surfaces of the support columns 11A, and the locking device 23 places a pair of through beams 70 on the upper surfaces of the pair of joint portions 14 to lock the support columns 11A. ..

開閉機構７１Ａは、基部５０の一方の梁部材５３Ｂ上に設けられており、一対のかんぬき梁７０の一端側を下から支持する一対の支持部７２と、この一対の支持部７２を略水平に移動する移動機構７３と、を備える。 The opening / closing mechanism 71A is provided on one beam member 53B of the base 50, and the pair of support portions 72 that support one end side of the pair of piercing beams 70 from below and the pair of support portions 72 are substantially horizontal. A moving mechanism 73 for moving is provided.

支持部７２は、かんぬき梁７０の底面を下から支持する水平片７２１と、この水平片７２１の両端から鉛直方向に延びてかんぬき梁７０の両側面に当接する一対の鉛直片７２２と、を備える。
図１７および図１８に示すように、支持部７２の水平片７２１の上面から梁部材５３Ｂの下面までの距離ｈ１は、かんぬき梁７０の高さ寸法ｈ２よりも僅かに高くなっている。これにより、かんぬき梁７０を梁部材５３Ｂに干渉することなく水平移動できる。 The support portion 72 includes a horizontal piece 721 that supports the bottom surface of the punching beam 70 from below, and a pair of vertical pieces 722 that extend vertically from both ends of the horizontal piece 721 and abut on both side surfaces of the punching beam 70. ..
As shown in FIGS. 17 and 18, the distance h 1 from the upper surface of the horizontal piece 721 of the support portion 72 to the lower surface of the beam member 53B is slightly higher than the height dimension h 2 of the beam 70. As a result, the beam 70 can be horizontally moved without interfering with the beam member 53B.

移動機構７３は、モータ７４と、モータ７４から水平方向に離れた位置に回転自在に設けられた滑車７５と、これらモータ７４と滑車７５との間に巻き回されたチェーン７６と、を備える。一方の支持部７２は、チェーン７６の上側の部分に固定され、他方の支持部７２は、チェーン７６の下側の部分に固定されている。また、ねじ７７を回転させることで、滑車７５がモータ７４に対して接近あるいは離隔し、これにより、チェーン７６の張力を調整可能となっている。 The moving mechanism 73 includes a motor 74, a pulley 75 rotatably provided at a position horizontally separated from the motor 74, and a chain 76 wound between the motor 74 and the pulley 75. One support portion 72 is fixed to the upper portion of the chain 76, and the other support portion 72 is fixed to the lower portion of the chain 76. Further, by rotating the screw 77, the pulley 75 approaches or separates from the motor 74, whereby the tension of the chain 76 can be adjusted.

開閉機構７１Ｂは、基部５０の他方の梁部材５３Ｂ上に設けられており、一対のかんぬき梁７０の他端側を下から支持する一対の支持部７２と、この一対の支持部７２を略水平に移動する移動機構７３と、を備える。これら開閉機構７１Ｂの支持部７２および移動機構７３は、開閉機構７１Ａの支持部７２および移動機構７３と同様の構成である。 The opening / closing mechanism 71B is provided on the other beam member 53B of the base 50, and the pair of support portions 72 that support the other end side of the pair of piercing beams 70 from below and the pair of support portions 72 are substantially horizontal. It is provided with a moving mechanism 73 that moves to. The support portion 72 and the moving mechanism 73 of the opening / closing mechanism 71B have the same configuration as the supporting portion 72 and the moving mechanism 73 of the opening / closing mechanism 71A.

係止装置２３では、以下のようにして、クレーン設置床２０を支持柱１１Ａから側方に突出した継手部１４の上面に係止する。
すなわち、開閉機構７１Ａ、７１Ｂのモータ７４を駆動して、チェーン７６を図１７中矢印方向に回転させることで、支持部７２に支持された一対のかんぬき梁７０同士を接近させ、一対のかんぬき梁７０を支持柱１１Ａの継手部１４の上に位置させる。 In the locking device 23, the crane installation floor 20 is locked to the upper surface of the joint portion 14 projecting laterally from the support column 11A as follows.
That is, by driving the motors 74 of the opening / closing mechanisms 71A and 71B and rotating the chain 76 in the direction of the arrow in FIG. 70 is positioned on the joint portion 14 of the support column 11A.

この状態で、昇降装置２２によりクレーン設置床２０を下降させると、かんぬき梁７０が支持柱１１Ａの継手部１４の上面に係止し、このかんぬき梁７０にクレーン設置床２０の梁部材５３Ｂが係止する（図８参照）。これにより、クレーン設置床２０が支持柱１１Ａに支持される。
このとき、かんぬき梁７０は支持部７２に対して上方に相対移動するが、支持部７２の一対の鉛直片がかんぬき梁７０の両側面に当接しているので、かんぬき梁７０が上方に移動しても、このかんぬき梁７０の脱落を防止できる。 In this state, when the crane installation floor 20 is lowered by the lifting device 22, the crane beam 70 is locked to the upper surface of the joint portion 14 of the support column 11A, and the beam member 53B of the crane installation floor 20 is engaged with the beam 70. Stop (see FIG. 8). As a result, the crane installation floor 20 is supported by the support pillar 11A.
At this time, the perforated beam 70 moves upward relative to the support portion 72, but since the pair of vertical pieces of the support portion 72 are in contact with both side surfaces of the perforated beam 70, the perforated beam 70 moves upward. However, it is possible to prevent the plumb bob beam 70 from falling off.

一方、係止装置２３では、以下のようにして、クレーン設置床２０の継手部１４の係止状態を解除する。
すなわち、昇降装置２２によりクレーン設置床２０を少し上昇させて、かんぬき梁７０を支持部７２に対して下方に相対移動させ、支持部７２の水平片７２１の上に載せる。これにより、かんぬき梁７０の上面と梁部材５３Ｂの下面との間には、隙間が形成される。
この状態で、開閉機構７１Ａ、７１Ｂのモータ７４を駆動して、チェーン７６を図１８中矢印方向に回転させることで、支持部７２に支持された一対のかんぬき梁７０同士を離間させて、一対のかんぬき梁７０を支持柱１１Ａの継手部１４の上から退避させる。これにより、かんぬき梁７０と梁部材５３Ｂとが接触することなく、かんぬき梁７０を円滑に水平移動できる。 On the other hand, in the locking device 23, the locked state of the joint portion 14 of the crane installation floor 20 is released as follows.
That is, the crane installation floor 20 is slightly raised by the elevating device 22, the beam 70 is moved downward relative to the support portion 72, and is placed on the horizontal piece 721 of the support portion 72. As a result, a gap is formed between the upper surface of the beam 70 and the lower surface of the beam member 53B.
In this state, the motors 74 of the opening / closing mechanisms 71A and 71B are driven to rotate the chain 76 in the direction of the arrow in FIG. The beam 70 is retracted from above the joint portion 14 of the support column 11A. As a result, the beam 70 can be smoothly moved horizontally without the beam 70 and the beam member 53B coming into contact with each other.

図１９は、振れ止め装置２４の平面図である。図２０は、振れ止め装置２４の拡大平断面図である。
振れ止め装置２４は、クレーン設置床２０に支持されて支持柱１１Ａの側面に当接して押さえるものである。
この振れ止め装置２４は、クレーン設置床２０の梁部材５３Ａ間にＸ方向に水平移動可能に架設されてＹ方向に延びる一対の第１支持部材８０と、各第１支持部材８０に一対ずつＹ方向に水平移動可能に設けられた第２支持部材８１と、各第２支持部材８１に螺合されて第２支持部材からのＹ方向の突出寸法を調整可能なボルト８２と、各第２支持部材８１に設けられて表面が円滑な滑り材８３と、を備える。 FIG. 19 is a plan view of the steady rest device 24. FIG. 20 is an enlarged plan sectional view of the steady rest device 24.
The steady rest device 24 is supported by the crane installation floor 20 and abuts on the side surface of the support pillar 11A to hold it down.
The steady rest device 24 is erected between the beam members 53A of the crane installation floor 20 so as to be horizontally movable in the X direction and extends in the Y direction, and a pair of first support members 80 and a pair of Y on each of the first support members 80. A second support member 81 provided so as to be horizontally movable in the direction, a bolt 82 screwed into each second support member 81 to adjust the protrusion dimension in the Y direction from the second support member, and each second support. A sliding member 83 provided on the member 81 and having a smooth surface is provided.

第１支持部材８０は、一対の梁部材５３Ａ間に支持柱１１ＡをＸ方向から挟んで架設されている。この第１支持部材８０の両端側は、梁部材５３Ａの挿通孔５４に挿通され、複数のボルト挿通孔５５に選択的にボルト固定されている。これにより、第１支持部材８０を梁部材５３ＡのＸ方向の任意の位置に仮固定可能となっている。 The first support member 80 is erected with the support column 11A sandwiched between the pair of beam members 53A from the X direction. Both ends of the first support member 80 are inserted into the insertion holes 54 of the beam member 53A, and are selectively bolted to the plurality of bolt insertion holes 55. As a result, the first support member 80 can be temporarily fixed at an arbitrary position in the X direction of the beam member 53A.

第２支持部材８１は、各第１支持部材８０に支持柱１１ＡをＹ方向から挟んだ位置に設けられている。第１支持部材８０には、複数のボルト挿通孔８４が第２支持部材８１の長さ方向に並んで形成されている。この第２支持部材８１は、複数のボルト挿通孔８４に選択的にボルト固定されている。これにより、第２支持部材８１を第１支持部材８０のＹ方向の任意の位置に仮固定可能となっている。 The second support member 81 is provided at a position where the support pillar 11A is sandwiched between the first support members 80 from the Y direction. The first support member 80 is formed with a plurality of bolt insertion holes 84 arranged side by side in the length direction of the second support member 81. The second support member 81 is selectively bolted to a plurality of bolt insertion holes 84. As a result, the second support member 81 can be temporarily fixed at an arbitrary position in the Y direction of the first support member 80.

滑り材８３は、支持柱１１Ａの四隅近傍に位置している。クレーン設置床２０を下降させる際に、この滑り材８３が支持柱１１Ａに摺動することで、クレーン設置床２０の円滑な昇降を確保する。 The sliding member 83 is located near the four corners of the support pillar 11A. When the crane installation floor 20 is lowered, the sliding member 83 slides on the support pillar 11A to ensure smooth ascent and descent of the crane installation floor 20.

振れ止め装置２４では、ボルト８２を回転させて前進させ、このボルト８２の頭部を支持柱１１Ａの側面に当接させることにより、クレーン設置床２０のＹ方向の振れ止めを行う。一方、ボルト８２を回転させて後退させることで、クレーン設置床２０のＹ方向の振れ止めを解除できる。
また、図２０に示すように、滑り材８３と支持柱１１Ａの側面との間にくさび８５を打ち込むことで、クレーン設置床２０のＸ方向の振れ止めを行う。一方、くさび８５を取り外すことで、クレーン設置床２０のＸ方向の振れ止めを解除できる。 In the steady rest device 24, the bolt 82 is rotated to move forward, and the head of the bolt 82 is brought into contact with the side surface of the support pillar 11A to prevent the crane installation floor 20 from being steady in the Y direction. On the other hand, by rotating the bolt 82 to retract it, the steady rest of the crane installation floor 20 in the Y direction can be released.
Further, as shown in FIG. 20, a wedge 85 is driven between the sliding member 83 and the side surface of the support column 11A to prevent the crane installation floor 20 from being swayed in the X direction. On the other hand, by removing the wedge 85, the steady rest of the crane installation floor 20 in the X direction can be released.

以下、既存建物１を解体する手順について、図２１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１に示すように、解体システム２を構築する。
すなわち、既存建物１の屋上階にクレーン設置床２０、クレーン２１、昇降装置２２、係止装置２３、振れ止め装置２４を構築する。また、既存建物１の外壁面に沿って地表面に外部足場２５を架設する。 Hereinafter, the procedure for dismantling the existing building 1 will be described with reference to the flowchart of FIG.
In step S1, as shown in FIG. 1, the dismantling system 2 is constructed.
That is, a crane installation floor 20, a crane 21, an elevating device 22, a locking device 23, and a steady rest device 24 are constructed on the rooftop floor of the existing building 1. In addition, an external scaffold 25 is erected on the ground surface along the outer wall surface of the existing building 1.

ここで、所定の支持柱１１Ａの上に仮設柱１５を取り付けておき、この仮設柱１５の頂部に昇降装置２２の反力部材４１を取り付ける。このとき、反力部材４１の仮固定ジャッキ６２を駆動して、反力部材４１を支持柱１１Ａに仮固定する。
また、係止装置２３のかんぬき梁７０を、仮設ピース１６を介して、屋上階床レベルの支持柱１１Ａの継手部１４上に載置することで、クレーン設置床２０を支持柱１１Ａ、１１Ｂに仮支持させる。
また、振れ止め装置２４のボルト８２により、クレーン設置床２０の支持柱１１Ａ、１１Ｂに対するＹ方向の振れ止めを行うとともに、振れ止め装置２４のくさび８５を取り付けて、クレーン設置床２０の支持柱１１Ａ、１１Ｂに対するＸ方向の振れ止めを行う。 Here, the temporary pillar 15 is mounted on the predetermined support pillar 11A, and the reaction force member 41 of the elevating device 22 is mounted on the top of the temporary pillar 15. At this time, the temporary fixing jack 62 of the reaction force member 41 is driven to temporarily fix the reaction force member 41 to the support column 11A.
Further, by mounting the crane beam 70 of the locking device 23 on the joint portion 14 of the support pillar 11A at the rooftop floor level via the temporary piece 16, the crane installation floor 20 is placed on the support pillars 11A and 11B. Temporarily support.
Further, the bolts 82 of the steady rest device 24 are used to prevent the support columns 11A and 11B of the crane installation floor 20 from being steady in the Y direction, and the wedge 85 of the steady rest device 24 is attached to the support columns 11A of the crane installation floor 20. , The steady rest in the X direction with respect to 11B is performed.

ステップＳ２では、図２２に示すように、クレーン２１を用いて、支持柱１１Ａ、１１Ｂを残して、既存建物１を屋上階から２層分解体する。このとき、支持柱１１Ａ、１１Ｂの継手部１４を残すようにする。
なお、後述のステップＳ１０においてステップＳ２を繰り返す場合には、既存建物１を２層分ではなく１層分解体するものとする。 In step S2, as shown in FIG. 22, a crane 21 is used to disassemble the existing building 1 into two layers from the rooftop floor, leaving the support columns 11A and 11B. At this time, the joint portions 14 of the support columns 11A and 11B are left.
When step S2 is repeated in step S10 described later, the existing building 1 is disassembled into one layer instead of two layers.

ステップＳ３では、支持柱１１Ａ、１１Ｂによるクレーン設置床２０の仮支持を解除する。
すなわち、支持柱１１Ａによるクレーン設置床２０の振れ止めを解除する。具体的には、振れ止め装置２４のボルト８２を後退させるとともに、振れ止め装置２４のくさび８５を取り外す。
次に、ストランドジャッキ４３により吊り材４２に張力を導入して、クレーン設置床２０少し上方に持ち上げて地切りする。この状態で、係止装置２３の開閉機構７１Ａ、７１Ｂを駆動して、一対のかんぬき梁７０を支持柱１１Ａの継手部１４の上から退避させる。これにより、クレーン設置床２０は、昇降装置２２を介して支持柱１１Ａに仮支持された状態となる。 In step S3, the temporary support of the crane installation floor 20 by the support columns 11A and 11B is released.
That is, the steady rest of the crane installation floor 20 by the support pillar 11A is released. Specifically, the bolt 82 of the steady rest device 24 is retracted, and the wedge 85 of the steady rest device 24 is removed.
Next, tension is introduced into the suspension material 42 by the strand jack 43, and the crane installation floor 20 is lifted slightly upward to cut the ground. In this state, the opening / closing mechanisms 71A and 71B of the locking device 23 are driven to retract the pair of punching beams 70 from above the joint portion 14 of the support column 11A. As a result, the crane installation floor 20 is temporarily supported by the support pillar 11A via the elevating device 22.

ステップＳ４では、図２３に示すように、昇降装置２２のストランドジャッキ４３を駆動して、クレーン設置床２０を支持柱１１Ａに沿って１層分下降させる。このとき、振れ止め装置２４の滑り材８３およびガイド部材３８でクレーン設置床２０の下降をガイドする。つまり、昇降装置２２によりクレーン設置床２０を支持柱１１Ａから仮支持しながら下降させるが、支持柱１１Ａ、１１Ｂおよび外部足場２５により、このクレーン設置床２０の下降を案内する。
ステップＳ５では、クレーン設置床２０を支持柱１１Ａ、１１Ｂに再度仮支持させる。
すなわち、係止装置２３の開閉機構７１Ａ、７１Ｂを駆動して、一対のかんぬき梁７０を支持柱１１Ａの継手部１４の上に位置させる。次に、ストランドジャッキ４３によりクレーン設置床２０を下降させて、係止装置２３のかんぬき梁７０を支持柱１１Ａの継手部１４の上面に係止させる。次に、振れ止め装置２４のボルト８２でクレーン設置床２０のＹ方向の振れ止めを行うとともに、振れ止め装置２４のくさび８５を取り付けて、クレーン設置床２０のＸ方向の振れ止めを行う。 In step S4, as shown in FIG. 23, the strand jack 43 of the elevating device 22 is driven to lower the crane installation floor 20 by one layer along the support pillar 11A. At this time, the sliding member 83 and the guide member 38 of the steady rest device 24 guide the lowering of the crane installation floor 20. That is, the lifting device 22 lowers the crane installation floor 20 while temporarily supporting it from the support pillar 11A, and the support pillars 11A and 11B and the external scaffold 25 guide the crane installation floor 20 to lower.
In step S5, the crane installation floor 20 is temporarily supported by the support columns 11A and 11B again.
That is, the opening / closing mechanisms 71A and 71B of the locking device 23 are driven to position the pair of punching beams 70 on the joint portion 14 of the support column 11A. Next, the crane installation floor 20 is lowered by the strand jack 43, and the piercing beam 70 of the locking device 23 is locked to the upper surface of the joint portion 14 of the support column 11A. Next, the bolt 82 of the steady rest device 24 is used to hold the crane installation floor 20 in the Y direction, and the wedge 85 of the steady rest device 24 is attached to hold the crane installation floor 20 in the X direction.

ステップＳ６では、図２４に示すように、外部足場２５の上部を解体し、ガイド部材３８を下方に盛り替える。
ステップＳ７では、昇降装置２２の反力部材４１を支持柱１１Ａから取り外して仮置きする。このとき、取り外した反力部材４１を既存柱１１の頂部に仮置きしてもよい。
すなわち、クレーン設置床２０上からチェーン６９を引っ張ることで、反力部材４１の仮固定ジャッキ６２を駆動して、反力部材４１の仮固定を解除する。次に、反力部材４１をクレーン２１で吊り上げて、この支持柱１１Ａから取り外す。
ステップＳ８は、図２４に示すように、支持柱１１Ａの上部を切断して撤去する。このようにして、支持柱１１Ａを含む全ての既存柱１１の上部を撤去する。 In step S6, as shown in FIG. 24, the upper part of the external scaffold 25 is disassembled, and the guide member 38 is replaced downward.
In step S7, the reaction force member 41 of the elevating device 22 is removed from the support column 11A and temporarily placed. At this time, the removed reaction force member 41 may be temporarily placed on the top of the existing pillar 11.
That is, by pulling the chain 69 from the crane installation floor 20, the temporary fixing jack 62 of the reaction force member 41 is driven to release the temporary fixing of the reaction force member 41. Next, the reaction force member 41 is lifted by the crane 21 and removed from the support column 11A.
In step S8, as shown in FIG. 24, the upper part of the support column 11A is cut and removed. In this way, the upper part of all the existing pillars 11 including the support pillar 11A is removed.

ステップＳ９は、図２４に示すように、反力部材４１を、支持柱１１Ａの頂部に再度仮固定する。
すなわち、反力部材４１をクレーン２１で吊り上げて、支持柱１１Ａの頂部に再度配置する。次に、クレーン設置床２０上からチェーン６９を引っ張ることで、反力部材４１の仮固定ジャッキ６２を駆動して、反力部材４１を支持柱１１Ａに仮固定する。また、振れ止め装置２４のボルト８２でクレーン設置床２０のＹ方向の振れ止めを行うとともに、振れ止め装置２４のくさび８５を取り付けて、クレーン設置床２０のＸ方向の振れ止めを行う。
ステップＳ１０は、ステップＳ２からステップＳ９までを繰り返す。 In step S9, as shown in FIG. 24, the reaction force member 41 is temporarily fixed to the top of the support column 11A again.
That is, the reaction force member 41 is lifted by the crane 21 and rearranged on the top of the support column 11A. Next, by pulling the chain 69 from the crane installation floor 20, the temporary fixing jack 62 of the reaction force member 41 is driven to temporarily fix the reaction force member 41 to the support pillar 11A. Further, the bolt 82 of the steady rest device 24 is used to hold the crane installation floor 20 in the Y direction, and the wedge 85 of the steady rest device 24 is attached to hold the crane installation floor 20 in the X direction.
Step S10 repeats steps S2 to S9.

本実施形態によれば、以下のような効果がある。
（１）既存建物１を囲む外部足場２５を地表面に架設するとともに、既存建物１の解体対象となるフロアを覆うクレーン設置床２０を構築した。ここで、既存建物１の一部の既存柱１１を支持柱１１Ａとし、この支持柱１１Ａにクレーン設置床２０のＹ方向中央部を仮支持させるとともに、クレーン設置床２０のＹ方向中央部側からＹ方向両端側を吊り下げ支持する吊り架構３５を設けた。そして、クレーン設置床２０に設置したクレーン２１により既存建物１を解体しながら、昇降装置２２によりクレーン設置床を下降させた。よって、従来のようにクレーン設置床に既存床の一部を利用しないので、大掛かりな補強が不要となり、施工費用を削減できる。 According to this embodiment, there are the following effects.
(1) An external scaffold 25 surrounding the existing building 1 was erected on the ground surface, and a crane installation floor 20 covering the floor to be demolished of the existing building 1 was constructed. Here, a part of the existing pillars 11 of the existing building 1 are designated as support pillars 11A, and the support pillars 11A temporarily support the central portion of the crane installation floor 20 in the Y direction, and from the Y-direction central portion side of the crane installation floor 20. A suspension frame 35 was provided to suspend and support both ends in the Y direction. Then, while the existing building 1 was dismantled by the crane 21 installed on the crane installation floor 20, the crane installation floor was lowered by the elevating device 22. Therefore, unlike the conventional case, a part of the existing floor is not used for the crane installation floor, so that large-scale reinforcement is not required and the construction cost can be reduced.

（２）解体対象となるフロアの側面を外部足場２５で囲むとともに、上面をクレーン設置床２０で覆ったので、解体工事で発生する粉塵が飛散したり騒音が外部に漏れたりするのを防止できる。
（３）吊り架構３５によりクレーン設置床２０のＹ方向中央部側からＹ方向両端側を吊り下げ支持したので、クレーン設置床２０の面積が広い場合でも、クレーン設置床２０の中央部のみを支持柱１１Ａで仮支持すればよいので、昇降装置２２の設置台数を増やす必要がなく、施工費用が増大するのを抑制できる。 (2) Since the side surface of the floor to be dismantled is surrounded by the external scaffolding 25 and the upper surface is covered with the crane installation floor 20, it is possible to prevent dust generated during the dismantling work from scattering and noise from leaking to the outside. ..
(3) Since the suspension frame 35 suspends and supports both ends of the crane installation floor 20 in the Y direction from the center portion side in the Y direction, only the central portion of the crane installation floor 20 is supported even when the area of the crane installation floor 20 is large. Since it is only necessary to temporarily support the pillar 11A, it is not necessary to increase the number of lifting devices 22 installed, and it is possible to suppress an increase in construction cost.

（４）吊り支柱３６と吊りケーブル３７とを含んで吊り架構３５を構成したので、簡易な構成で吊り架構３５を実現でき、低コストとなる。
（５）クレーン設置床２０の外周にガイドフレーム３３を設けるとともに、外部足場２５にガイドフレーム３３の下降を案内するガイド部材３８を設けた。よって、クレーン設置床２０を支持柱１１Ａ、１１Ｂに沿って下降させると、クレーン設置床２０とともにガイドフレーム３３も下降するが、このとき、外部足場２５に取り付けたガイド部材３８によりガイドフレーム３３の下降を案内するので、クレーン設置床２０の円滑な移動を確保できる。 (4) Since the suspension frame 35 is configured by including the suspension column 36 and the suspension cable 37, the suspension frame 35 can be realized with a simple configuration, and the cost is low.
(5) A guide frame 33 is provided on the outer periphery of the crane installation floor 20, and a guide member 38 for guiding the descent of the guide frame 33 is provided on the external scaffold 25. Therefore, when the crane installation floor 20 is lowered along the support columns 11A and 11B, the guide frame 33 is also lowered together with the crane installation floor 20. At this time, the guide frame 33 is lowered by the guide member 38 attached to the external scaffold 25. Therefore, the smooth movement of the crane installation floor 20 can be ensured.

（６）昇降装置２２を、フレーム４０、反力部材４１、吊り材４２、およびストランドジャッキ４３を含んで構成した。さらに、吊り材４２を反力部材４１の滑車６４に巻いて、この吊り材４２の一端側をフレーム４０の吊り材支持部５２に連結し、吊り材４２の他端側をストランドジャッキ４３に連結した。よって、ストランドジャッキ４３により吊り材４２を引っ張ることで、クレーン設置床２０が支持柱１１Ａに対して上昇し、ストランドジャッキ４３により吊り材４２を送り出すことで、クレーン設置床２０が支持柱１１Ａに対して下降する。したがって、反力部材４１の滑車６４を利用することで、単一のストランドジャッキ４３でクレーン設置床２０を昇降できるので、施工コストを削減できる。 (6) The lifting device 22 includes a frame 40, a reaction force member 41, a suspending member 42, and a strand jack 43. Further, the suspension material 42 is wound around the pulley 64 of the reaction force member 41, one end side of the suspension material 42 is connected to the suspension material support portion 52 of the frame 40, and the other end side of the suspension material 42 is connected to the strand jack 43. did. Therefore, by pulling the suspension material 42 by the strand jack 43, the crane installation floor 20 rises with respect to the support pillar 11A, and by sending out the suspension material 42 by the strand jack 43, the crane installation floor 20 with respect to the support pillar 11A. And descend. Therefore, by using the pulley 64 of the reaction force member 41, the crane installation floor 20 can be raised and lowered by a single strand jack 43, so that the construction cost can be reduced.

（７）Ｙ方向中央部の支持柱１１Ａだけでなく、Ｙ方向両端の支持柱１１Ｂにも、係止装置２３および振れ止め装置２４を設けた。よって、クレーン設置床２０を仮支持する際には、係止装置２３によりクレーン設置床２０を確実に安定的に仮支持できる。また、クレーン設置床２０を下降させる際には、振れ止め装置２４によりクレーン設置床２０を円滑に移動できる。 (7) The locking device 23 and the steady rest device 24 are provided not only on the support columns 11A at the center in the Y direction but also on the support columns 11B at both ends in the Y direction. Therefore, when the crane installation floor 20 is temporarily supported, the crane installation floor 20 can be reliably and stably temporarily supported by the locking device 23. Further, when the crane installation floor 20 is lowered, the crane installation floor 20 can be smoothly moved by the steady rest device 24.

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、本実施形態では、クレーン設置床２０にジブクレーンであるクレーン２１を設けたが、これに限らず、天井走行クレーンやテルハを設けてもよい。
また、本実施形態では、既存建物１の屋上階のフロア全体を覆うようにクレーン設置床２０を設けたが、これに限らず、クレーン設置床をフロアの一部のみを覆うように設けてもよい。 The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the range in which the object of the present invention can be achieved are included in the present invention.
For example, in the present embodiment, the crane 21 which is a jib crane is provided on the crane installation floor 20, but the present invention is not limited to this, and an overhead traveling crane or a telpher may be provided.
Further, in the present embodiment, the crane installation floor 20 is provided so as to cover the entire rooftop floor of the existing building 1, but the present invention is not limited to this, and the crane installation floor may be provided so as to cover only a part of the floor. Good.

１…既存建物（既存構造物） ２…解体システム
１１…既存柱 １１Ａ、１１Ｂ…支持柱 １２…既存梁 １３…既存床
１４…支持柱の継手部 １５…仮設柱 １６…仮設ピース
２０…クレーン設置床 ２１…クレーン ２２…昇降装置 ２３…係止装置
２４…振れ止め装置 ２５…外部足場
３０…床フレーム ３１…梁部材 ３２…トラス梁 ３３…ガイドフレーム
３４…床部材
３５…吊り架構 ３６…吊り支柱 ３７…吊りケーブル ３８…ガイド部材
４０…フレーム ４１…反力部材 ４２…吊り材 ４３…ストランドジャッキ
５０…基部 ５１…ジャッキ支持部 ５２…吊り材支持部 ５３Ａ、５３Ｂ…梁部材
５４…挿通孔 ５５…ボルト挿通孔
６０…ボックス部材 ６１…反力梁 ６２…仮固定ジャッキ ６３…水平部材
６４…滑車 ６５…プーリ ６６…ねじ ６７…長孔 ６８…ハンドル
６９…チェーン
７０…かんぬき梁 ７１Ａ、７１Ｂ…開閉機構 ７２…支持部 ７３…移動機構
７４…モータ ７５…滑車 ７６…チェーン ７２１…水平片 ７２２…鉛直片
８０…第１支持部材 ８１…第２支持部材 ８２…ボルト ８３…滑り材
８４…ボルト挿通孔 ８５…くさび
９０…走行レール ９１…走行台車
９２…クレーン本体 ９３…ジブ ９４…巻上装置 1 ... Existing building (existing structure) 2 ... Dismantling system 11 ... Existing pillars 11A, 11B ... Support pillars 12 ... Existing beams 13 ... Existing floors 14 ... Support pillar joints 15 ... Temporary pillars 16 ... Temporary pieces 20 ... Crane installation Floor 21 ... Crane 22 ... Lifting device 23 ... Locking device 24 ... Anti-sway device 25 ... External scaffold 30 ... Floor frame 31 ... Beam member 32 ... Truss beam 33 ... Guide frame 34 ... Floor member 35 ... Suspension frame 36 ... Suspension support 37 ... Suspension cable 38 ... Guide member 40 ... Frame 41 ... Reaction force member 42 ... Suspension material 43 ... Strand jack 50 ... Base 51 ... Jack support 52 ... Suspension material support 53A, 53B ... Beam member 54 ... Insertion hole 55 ... Bolt insertion hole 60 ... Box member 61 ... Reaction beam 62 ... Temporary fixing jack 63 ... Horizontal member 64 ... Crane 65 ... Pulley 66 ... Screw 67 ... Long hole 68 ... Handle 69 ... Chain 70 ... Crane beam 71A, 71B ... Opening and closing mechanism 72 ... Support part 73 ... Movement mechanism 74 ... Motor 75 ... Crane 76 ... Chain 721 ... Horizontal piece 722 ... Vertical piece 80 ... First support member 81 ... Second support member 82 ... Bolt 83 ... Sliding material 84 ... Bolt insertion hole 85 ... wedge 90 ... traveling rail 91 ... traveling carriage 92 ... crane body 93 ... jib 94 ... hoisting device

Claims (4)

既存構造物を解体する解体システムであって、
既存構造物の所定のフロアの上に構築されて当該フロアを覆う平面視で矩形状のクレーン設置床と、当該クレーン設置床を支持する既存柱である支持柱と、前記クレーン設置床上に設置されたクレーンと、前記クレーン設置床を前記支持柱に沿って下降させる昇降装置と、前記既存構造物を囲んで地表面に架設された外部足場と、を備え、
前記支持柱は、前記クレーン設置床の短手方向中央部でかつ長手方向に沿って延びる領域を下から支持し、
前記クレーン設置床の上面には、当該クレーン設置床の短手方向に延びて当該クレーン設置床を吊り下げ支持する吊り架構が前記クレーン設置床の長手方向に並んで複数設けられ、
前記吊り架構は、それぞれ、前記クレーン設置床の短手方向中央部に立設された一対の吊り支柱と、当該一対の吊り支柱の頂部に架設されて両端が前記クレーン設置床の短手方向両端側に連結された吊りケーブルと、を備えることを特徴とする既存構造物の解体システム。 A dismantling system that dismantles existing structures
A rectangular crane installation floor in plan view to cover the floor built on a given floor of the existing structure, and the support column is an existing column for supporting the crane installation floor is installed in the crane installation floor It is provided with a crane, an elevating device for lowering the crane installation floor along the support pillar, and an external scaffold erected on the ground surface surrounding the existing structure.
The support column supports a region extending along the longitudinal direction at the center of the crane installation floor in the lateral direction from below.
On the upper surface of the crane installation floor, a plurality of suspension frames extending in the lateral direction of the crane installation floor to suspend and support the crane installation floor are provided side by side in the longitudinal direction of the crane installation floor.
The suspension Frame, respectively, the short and a pair of hanging struts hand erected in direction central portion, the lateral direction at both ends of the bridging to the top of the pair of hanging struts across the crane installation floor of the crane installation floor dismantling system of existing structures you, comprising a suspension cable coupled to the side, a. 前記クレーン設置床には、当該クレーン設置床の外周に沿ってガイドフレームが設けられ、
前記外部足場には、前記ガイドフレームの側面に当接して当該ガイドフレームの下降を案内するガイド部材が設けられることを特徴とする請求項１に記載の既存構造物の解体システム。 A guide frame is provided on the crane installation floor along the outer circumference of the crane installation floor.
The dismantling system for an existing structure according to claim 1, wherein the external scaffold is provided with a guide member that comes into contact with the side surface of the guide frame and guides the lowering of the guide frame. 前記昇降装置は、前記支持柱の上端に取り付けられて略水平に延びてかつ両端側に回転自在に設けられた一対の滑車を有する反力部材と、当該反力部材の滑車に巻かれて一端側が前記クレーン設置床に連結された吊り材と、前記クレーン設置床に設けられて前記吊り材の他端側を引っ張る昇降ジャッキと、をさらに備えることを特徴とする請求項１または２に記載の既存構造物の解体システム。 The elevating device has a reaction force member having a pair of pulleys attached to the upper end of the support column, extending substantially horizontally and rotatably provided on both ends, and one end wound around the pulleys of the reaction force member. The first or second aspect of claim 1 or 2, further comprising a suspension material whose side is connected to the crane installation floor, and an elevating jack which is provided on the crane installation floor and pulls the other end side of the suspension material. Demolition system for existing structures. 既存構造物を解体する解体方法であって、
当該既存構造物の短手方向中央部の所定の既存柱を支持柱とし、当該支持柱に仮支持させて前記既存構造物の所定のフロア上に当該フロアを覆う平面視で矩形状のクレーン設置床を構築し、このとき、前記支持柱により前記クレーン設置床の短手方向中央部でかつ長手方向に沿って延びる領域を下から支持し、前記クレーン設置床の上面に当該クレーン設置床の短手方向に延びて当該クレーン設置床を吊り下げ支持する吊り架構を長手方向に並んで複数設け、さらに、当該クレーン設置床にクレーンを設置するとともに、前記既存構造物を囲む外部足場を地表面に架設する第１工程と、
前記クレーンを用いて、少なくとも前記支持柱を残して前記所定のフロアから１層分を解体する第２工程と、
前記支持柱による前記クレーン設置床の仮支持を解除し、前記クレーン設置床を前記支持柱に沿って１層分下降させて、その後、前記クレーン設置床を前記支持柱に再度仮支持させる第３工程と、
前記外部足場の上部を解体するとともに、前記支持柱の上部を撤去する第４工程と、
前記第２工程から第４工程までを繰り返す第５工程と、を備え、
前記吊り架構は、それぞれ、前記クレーン設置床の短手方向中央部に立設された一対の吊り支柱と、当該一対の吊り支柱の頂部に架設されて両端が前記クレーン設置床の短手方向両端側に連結された吊りケーブルと、を備えることを特徴とする既存構造物の解体方法。 It is a dismantling method that dismantles an existing structure.
A rectangular crane is installed on a predetermined floor of the existing structure by using a predetermined existing pillar at the center of the existing structure in the lateral direction as a support pillar and temporarily supporting the existing pillar to cover the floor. A floor is constructed, and at this time, a region extending in the central portion in the lateral direction and along the longitudinal direction of the crane installation floor is supported from below by the support pillar, and the short portion of the crane installation floor is placed on the upper surface of the crane installation floor. A plurality of suspension structures extending in the hand direction to suspend and support the crane installation floor are provided side by side in the longitudinal direction , a crane is installed on the crane installation floor, and an external scaffold surrounding the existing structure is placed on the ground surface. The first step of erection and
A second step of dismantling one layer from the predetermined floor using the crane, leaving at least the support pillars.
Releasing the crane installation temporary support of the floor by the support column, said crane installation floor is lowered one layer along the support column, then the cause of the previous SL crane installation floor temporarily supported again by the support pillar 3 steps and
The fourth step of dismantling the upper part of the external scaffold and removing the upper part of the support pillar, and
A fifth step of repeating the second step to the fourth step is provided.
The suspension Frame, respectively, the short and a pair of hanging struts hand erected in direction central portion, the lateral direction at both ends of the bridging to the top of the pair of hanging struts across the crane installation floor of the crane installation floor A method of dismantling an existing structure, which comprises a suspension cable connected to the side.
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