JP4109637B2 - Working frame dismantling method and simple scaffold - Google Patents

Working frame dismantling method and simple scaffold Download PDF

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JP4109637B2
JP4109637B2 JP2004026398A JP2004026398A JP4109637B2 JP 4109637 B2 JP4109637 B2 JP 4109637B2 JP 2004026398 A JP2004026398 A JP 2004026398A JP 2004026398 A JP2004026398 A JP 2004026398A JP 4109637 B2 JP4109637 B2 JP 4109637B2
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steel material
gondola
support pile
steel
gantry
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雄士 櫻井
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本発明は、建設現場において仮設される作業用構台を解体するための作業用構台解体方法および簡易足場に関する。 The present invention also relates to work for gantry dismantling method and a simple foot field for dismantling the work for the gantry to be temporary in the construction site.

建設現場において作業用構台を解体する際には、図12に示すように、高所作業用の足場を確保するために、作業用構台1の所定位置に足場2を配置させる必要がある。従来の解体作業においては、上記足場2を、作業者が作業用構台1の各支持杭3を登り降りしながら取付けていた。すなわち、各支持杭3の側面に取付けられた棒状あるいは突起状の足懸り等を利用して所定の高さ位置までよじ登り、同高さ位置において、足場2の取付け作業を行っていた。   When the work gantry is dismantled at the construction site, as shown in FIG. 12, it is necessary to place the scaffold 2 at a predetermined position of the work gantry 1 in order to secure a scaffold for work at a high place. In the conventional dismantling work, the scaffold 2 is attached while an operator climbs up and down each support pile 3 of the work gantry 1. That is, it climbs up to a predetermined height position using a rod-like or protruding foot suspension attached to the side surface of each support pile 3, and the scaffold 2 is attached at the same height position.

上述の解体作業においては、足場2の取付け箇所の数だけ、作業者が各支持杭3を登り降りしながら足場2を取付ける作業が必要となる。そのため、足場2の取付けに多くの時間を要し、ひいては作業用構台1の解体作業全体に長時間を要していた。また、作業者自身による支持杭3の登り降り作業を伴うため、危険性も高かった。さらに、足場2の取付け作業に時間と体力を要するために、作業者一人当たりの作業量も少なくならざるを得ず、解体作業のための人員も多く要していた。加えて、一つの足場2上で行える解体作業には限界があるため、作業用構台1の他の部分を解体するために、各足場2の間を移動する必要があった。もしくは、かかる移動を少なくするには、各足場2に十分な人員を配置する必要があった。
本発明は、上記課題にかんがみてなされたもので、少ない人員により、効率的かつ安全に作業用構台を解体することが可能な作業用構台解体方法および簡易足場を提供することを目的とする。
In the above-described dismantling work, an operator needs to attach the scaffold 2 while climbing and lowering each support pile 3 by the number of attachment points of the scaffold 2. For this reason, it takes a lot of time to mount the scaffold 2, and as a result, it takes a long time to disassemble the work gantry 1. Moreover, since the operator himself had to climb up and down the support pile 3, the risk was high. Furthermore, since the work for attaching the scaffold 2 requires time and physical strength, the amount of work per worker must be reduced, and a large number of personnel are required for dismantling work. In addition, since there is a limit to the dismantling work that can be performed on one scaffold 2, it is necessary to move between the scaffolds 2 in order to disassemble the other parts of the work gantry 1. Alternatively, in order to reduce such movement, it was necessary to arrange sufficient personnel on each scaffold 2.
The present invention has been made in view of the above problems, the fewer people, and to provide an efficient and safe working gantry capable of disassembling the working gantry disassembling method and a simple scaffolding .

上記目的を達成するため、請求項1にかかる発明は、略矩形板状の覆工板を地面よりも所定の高さ位置に平面状に複数枚敷設するため同覆工板の長手方向及び幅方向に夫々所定の間隔を空けて立設する複数の支持杭と、各支持杭を同幅方向に接続する複数の第一の鋼材と、各支持杭を同長手方向に接続する複数の第二の鋼材とによって組まれた作業用構台を解体する作業用構台解体方法であって、昇降型ゴンドラと同昇降型ゴンドラを吊り下げ支持するゴンドラ支持体とからなる解体作業用ゴンドラユニットを上記作業用構台の最上段の所定位置に設置するゴンドラユニット設置工程と、上記支持杭と第一の鋼材と第二の鋼材とによって形成される単位空間であって第一の鋼材又は第二の鋼材を含む一面が上記作業用構台の外側面を兼ねる単位空間が複数段積み重なった空間の内部又は外部において、上記昇降型ゴンドラを下降又は上昇させ、同昇降型ゴンドラが各第一の鋼材または第二の鋼材の高さ位置に移動した際に、上記作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材を一方とする上記最上段における第一の鋼材の対又は第二の鋼材の対のいずれかを除き、少なくとも、各鋼材の部位であって同空間の形成にのみ用いられている各鋼材の部位を切断又は除去する第一解体工程と、上記切断も除去も行われなかった第一の鋼材の対又は第二の鋼材の対が夫々上記支持杭の先端部位と交差する部位に、簡易足場の両先端部位を係止させることにより、同簡易足場を上記最上段の第一の鋼材間又は第二の鋼材間に架渡す足場架渡し工程と、上記最上段において簡易足場が架渡された第一の鋼材または第二の鋼材のうち上記作業用構台の外側面に含まれる鋼材の中途部位であって、上記支持杭間を接続する部位を切断する第二解体工程と、上記第一解体工程及び第二解体工程により他の支持杭と接続しない状態となった支持杭を除去する支持杭除去工程とを具備する構成としてある。   In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of substantially rectangular plate-like lining plates are laid out in a planar shape at a predetermined height position from the ground, so that the longitudinal direction and width of the lining plates are as follows. A plurality of support piles standing up at predetermined intervals in the direction, a plurality of first steel members connecting the support piles in the same width direction, and a plurality of second piles connecting the support piles in the same longitudinal direction A working gantry dismantling method for disassembling a working gantry assembled with a steel material of the above, comprising a gondola unit for dismantling work comprising an elevating gondola and a gondola support for supporting the elevating gondola suspended A unit space formed by a gondola unit installation step installed at a predetermined position on the uppermost stage of the gantry, the support pile, the first steel material, and the second steel material, and includes the first steel material or the second steel material A single surface also serves as the outer surface of the work gantry. When the elevating gondola is lowered or raised inside or outside the space where the space is stacked in multiple stages, and the elevating gondola moves to the height position of each first steel material or second steel material, the above work is performed. Except for either the first steel material pair or the second steel material pair in the uppermost stage including the first steel material or the second steel material included in the outer surface of the structural gantry, at least a part of each steel material A first disassembly step of cutting or removing each steel material part used only for forming the space, and a first steel material pair or a second steel material pair that has not been cut or removed. Scaffolding the simple scaffold between the first steel members or the second steel members of the uppermost stage by locking both tip portions of the simple scaffold to the portions intersecting with the tip portions of the support pile, respectively. There is a simple scaffolding in the transfer process and the top stage A second dismantling step of cutting a portion connecting between the support piles in the middle portion of the steel material included in the outer surface of the working gantry among the passed first steel material or second steel material; It is set as the structure which comprises the support pile removal process of removing the support pile which became the state which is not connected with another support pile by the 1st disassembly process and the 2nd disassembly process.

上記のように構成した請求項1の発明においては、作業用構台を解体する。同作業用構台は、地面よりも所定の高さ位置に略矩形板状の覆工板を平面状に複数枚敷設するため同覆工板の長手方向及び幅方向に夫々所定の間隔を空けて立設する複数の支持杭と、各支持杭を同幅方向に接続する複数の第一の鋼材と、各支持杭を同長手方向に接続する複数の第二の鋼材とによって組まれている。
上記作業用構台を解体するために、先ず、ゴンドラユニット設置工程において、昇降型ゴンドラと同昇降型ゴンドラを吊り下げ支持するゴンドラ支持体とからなる解体作業用ゴンドラユニットを上記作業用構台の最上段の所定位置に設置する。
In the invention of claim 1 configured as described above, the working gantry is disassembled. The work gantry lays a plurality of substantially rectangular lining plates in a plane at a predetermined height position above the ground, so that a predetermined interval is provided in the longitudinal direction and the width direction of the lining plate. It is assembled by a plurality of support piles to be erected, a plurality of first steel materials connecting the support piles in the same width direction, and a plurality of second steel materials connecting the support piles in the same longitudinal direction.
In order to dismantle the work gantry, first, in the gondola unit installation process, a dismantling work gondola unit comprising a lift gondola and a gondola support for supporting the lift gondola is suspended. Installed at a predetermined position.

次に、第一切断工程で、上記支持杭と第一の鋼材と第二の鋼材とによって形成される単位空間であって第一の鋼材又は第二の鋼材を含む一面が上記作業用構台の外側面を兼ねる単位空間が複数段積み重なった空間の内部又は外部において、上記昇降型ゴンドラを下降又は上昇させる。そして、同昇降型ゴンドラが各第一の鋼材または第二の鋼材の高さ位置に移動した際に、各鋼材を切断又は除去する。このとき、上記作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材を一方とする上記最上段における第一の鋼材の対又は第二の鋼材の対のいずれか一方を除き、少なくとも、各鋼材の部位であって同空間の形成にのみ用いられている各鋼材の部位を切断又は除去する。また、各鋼材を切断又は除去する順序を定めておき、同順序に従って各鋼材を切断又は除去してもよい。   Next, in the first cutting step, the one surface including the first steel material or the second steel material is a unit space formed by the support pile, the first steel material, and the second steel material. The elevating gondola is lowered or raised inside or outside a space where a plurality of unit spaces serving as outer surfaces are stacked. And when the said raising / lowering type gondola moves to the height position of each 1st steel material or the 2nd steel material, each steel material is cut | disconnected or removed. At this time, except for either one of the first steel material pair or the second steel material pair in the uppermost stage with the first steel material or the second steel material included in the outer surface of the working gantry, At least a portion of each steel material that is used only for forming the space is cut or removed. Moreover, the order which cuts or removes each steel material may be defined, and each steel material may be cut or removed according to the same order.

足場架渡し工程においては、上記設置された解体作業用ゴンドラユニットを移動させ、簡易足場を上記最上段の切断も除去も行われなかった第一の鋼材の対又は第二の鋼材の対の間に架渡す。具体的には、簡易足場の両先端部位をそれぞれ、第一の鋼材の対又は第二の鋼材の対が夫々上記支持杭の先端部位と交差する部位に係止させることにより、架渡す。このように、最上段の第一の鋼材間又は第二の鋼材間に簡易足場が架渡されることにより、最上段の第一の鋼材の対または第二の鋼材の対における、作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材までの移動手段が確保される。そして、第二切断工程で、同外側面に含まれる第一の鋼材又は第二の鋼材の中途部位であって、上記支持杭間を接続する部位を切断する。   In the scaffold transfer process, the installed gondola unit for dismantling work is moved, and the simple scaffold is between the first steel pair or the second steel pair that has not been cut or removed at the uppermost stage. To hand over. Specifically, the both ends of the simple scaffolding are suspended by engaging the first steel material pair or the second steel material pair with the region where the first steel material pair intersects the tip region of the support pile, respectively. In this way, the simple scaffolding is bridged between the uppermost first steel members or between the second steel members, so that the working gantry of the uppermost first steel member pair or the second steel member pair A moving means to the first steel material or the second steel material included in the outer surface is ensured. And a 2nd cutting process WHEREIN: It is the middle part of the 1st steel materials or 2nd steel materials contained in the outer side surface, Comprising: The site | part which connects between the said support piles is cut | disconnected.

上記第一解体工程及び第二解体工程により、その側面において接続する全ての第一の鋼材と第二の鋼材とが除去され或いは途中で切断され、その結果、他の支持杭とは接続しなくなった支持杭が出現する。そこで、支持杭除去工程において、他の支持杭と接続しない状態となった支持杭を除去する。すなわち、上記各工程を繰り返し、全ての支持杭についての除去が終了したときに、上記作業用構台の解体が完了する。   By the first disassembly step and the second disassembly step, all the first steel materials and the second steel materials to be connected on the side surfaces are removed or cut in the middle, and as a result, they are not connected to other support piles. Support piles appear. Then, in the support pile removal process, the support pile which became the state which is not connected with another support pile is removed. That is, the above steps are repeated, and when the removal of all the support piles is completed, the dismantling of the working gantry is completed.

請求項2にかかる発明は、上記請求項1に記載の作業用構台解体方法において、上記第一解体工程は、上記昇降型ゴンドラをゴンドラ支持体によって吊られた状態で略水平方向に移動させ昇降動作を行う位置を変化させる構成としてある。
上記のように構成した請求項2の発明においては、上記昇降型ゴンドラを、ゴンドラ支持体によって吊られた状態で略水平方向に移動させる。すなわち、解体作業用ゴンドラユニット全体を移動させなくとも、ある一定範囲内において昇降型ゴンドラの昇降動作を行う位置を変えることができるため、解体作業の効率が上がる。
The invention according to claim 2 is the working gantry disassembling method according to claim 1, wherein the first disassembling step moves the elevating gondola in a substantially horizontal direction while being hung by a gondola support. The position for performing the operation is changed.
In the invention of claim 2 configured as described above, the elevating gondola is moved in a substantially horizontal direction while being suspended by a gondola support. That is, since the position where the lifting and lowering gondola is moved up and down can be changed within a certain range without moving the entire disassembling work gondola unit, the efficiency of the disassembling work is improved.

請求項3にかかる発明は、上記請求項1または請求項2のいずれかに記載の作業用構台解体方法において、上記第一解体工程は、複数の昇降型ゴンドラを下降又は上昇させ所定の鋼材を複数箇所において切断し、同所定の鋼材を他の鋼材又は支持杭と接続しない状態にし除去する構成としてある。
上記のように構成した請求項3の発明においては、複数の昇降型ゴンドラを下降又は上昇させる。そして、所定の鋼材を複数箇所において切断し、同所定の鋼材を他の鋼材又は支持杭と接続しない状態にして除去する。例えば、二台の昇降型ゴンドラを、ある鋼材の両端付近を通過する位置に降下又は上昇させれば、同鋼材を両側から切断できるので、効率よく同鋼材を作業用構台から分離することができる。
According to a third aspect of the present invention, in the work gantry disassembling method according to any one of the first and second aspects, the first disassembling step lowers or raises the plurality of elevating gondola to obtain a predetermined steel material. It is set as the structure which cut | disconnects in several places and makes it the state which does not connect the said predetermined steel material with another steel material or a support pile.
In the invention of claim 3 configured as described above, the plurality of elevating gondola is lowered or raised. Then, the predetermined steel material is cut at a plurality of locations, and the predetermined steel material is removed in a state where it is not connected to other steel materials or support piles. For example, if two elevating gondola are lowered or raised to a position passing through both ends of a certain steel material, the steel material can be cut from both sides, so that the steel material can be efficiently separated from the work gantry. .

請求項4にかかる発明は、上記請求項1〜請求項3のいずれかに記載の作業用構台解体方法において、上記足場架渡し工程は、少なくとも一方の先端部位に支持杭先端のウェブ部に係止可能なウェブ部係止片を形成した簡易足場を用い、同ウェブ部係止片を、上記切断も除去も行われなかった最上段の第一の鋼材の対又は第二の鋼材の対における作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材と交差する支持杭のウェブ部に係止する構成としてある。   According to a fourth aspect of the present invention, in the method for disassembling a working gantry according to any one of the first to third aspects, the scaffold spanning step is related to the web portion at the tip of the support pile at at least one tip portion. Using a simple scaffold formed with a stopable web portion locking piece, the web portion locking piece in the uppermost first steel material pair or second steel material pair that was not cut or removed. It is set as the structure latched to the web part of the support pile which cross | intersects the 1st steel material or the 2nd steel material contained in the outer surface of a working gantry.

上記のように構成した請求項4の発明においては、簡易足場として、少なくとも一方の先端部位に支持杭先端のウェブ部に係止可能なウェブ部係止片を形成したものを用いる。そして、同ウェブ部係止片を、上記切断も除去も行われなかった最上段の第一の鋼材の対又は第二の鋼材の対における作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材と交差する支持杭のウェブ部に係止する。その結果、同簡易足場が最上段の第一の鋼材間又は第二の鋼材間に架渡される。ここで、上記支持杭や各鋼材としては、断面がIもしくはHのいわゆるH型鋼が多く使用される。そこで、同ウェブ部係止片をH型鋼のフランジ同士を接続するウェブ部分に係止する構成とすれば、簡易足場の一端を容易に、最上段の第一の鋼材の対又は第二の鋼材の対における作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材と交差する支持杭に係止することができる。   In invention of Claim 4 comprised as mentioned above, what formed the web part latching piece which can be latched to the web part of a support pile front-end | tip at least at one front-end | tip part is used as a simple scaffold. Then, the first steel member included in the outer surface of the working gantry in the uppermost pair of first steel members or the second pair of steel members that has not been cut or removed, Lock to the web portion of the support pile that intersects the second steel. As a result, the same simplified scaffold is stretched between the first steel materials or the second steel materials in the uppermost stage. Here, as the support pile and each steel material, so-called H-shaped steel having a cross section of I or H is often used. Therefore, if the web portion locking piece is configured to be locked to the web portion connecting the flanges of the H-shaped steel, one end of the simple scaffold can be easily formed at the uppermost first steel material pair or the second steel material. It can latch on the support pile which cross | intersects the 1st steel material or the 2nd steel material contained in the outer surface of the working gantry in this pair.

ただし、簡易足場の構成としては、請求項4に記載したものに限られない。請求項5にかかる発明は、上記請求項1〜請求項4のいずれかに記載の作業用構台解体方法において、上記足場架渡し工程は、少なくとも、一方の先端部位から上記簡易足場の中央側に所定距離接近した位置に支持杭先端のウェブ部に係止可能なウェブ部係止片を形成し、かつ、長手側の両縁部であって上記一方の先端近傍を含む複数箇所に上記昇降型ゴンドラを吊下げるためのゴンドラ吊下具を形成した簡易足場を用いる構成としてある。   However, the configuration of the simple scaffold is not limited to that described in claim 4. The invention according to claim 5 is the work gantry disassembling method according to any one of claims 1 to 4, wherein the scaffold transferring step is at least from one tip portion to the center side of the simple scaffold. A web part locking piece that can be locked to the web part at the tip of the support pile is formed at a position close to a predetermined distance, and the lifting mold is formed at a plurality of locations on both sides of the longitudinal side and including the vicinity of the one tip. A simple scaffold formed with a gondola suspension for hanging the gondola is used.

上記のように構成した請求項5の発明においては、簡易足場として、少なくとも一方の先端部位から同簡易足場の中央側に所定距離接近した位置に、支持杭先端のウェブ部に係止可能なウェブ部係止片を形成したものを用いる。さらに、同簡易足場の長手側の両縁部であって上記一方の先端近傍を含む複数箇所に、上記昇降型ゴンドラを吊下げるためのゴンドラ吊下具を形成する。当該構成とすれば、簡易足場の一方の先端部位が、最上段の第一の鋼材の対または第二の鋼材の対における作業用構台の外側面に含まれる第一の鋼材または第二の鋼材よりも更に外側に突き出た状態で、同簡易足場を第一の鋼材間又は第二の鋼材間に架渡すことができる。そして、上記一方の先端部位近傍に設けられたゴンドラ吊下具に昇降型ゴンドラを吊下げれば、簡易な構成で、作業用構台の外側面の外側において昇降型ゴンドラを昇降させることができる。   In the invention of claim 5 configured as described above, as a simple scaffold, a web that can be locked to the web portion at the tip of the support pile at a position approaching a predetermined distance from the center side of the simple scaffold from at least one tip portion. What formed the part latching piece is used. Furthermore, a gondola suspension for suspending the elevating gondola is formed at a plurality of locations on both edges on the longitudinal side of the simple scaffold and including the vicinity of the one end. With this configuration, the first steel material or the second steel material included in the outer surface of the work gantry in the first steel material pair or the second steel material pair in which the one end portion of the simple scaffold is the uppermost pair. The simple scaffold can be bridged between the first steel materials or between the second steel materials in a state of protruding further outward. If the elevating type gondola is suspended from the gondola suspension provided near the one end portion, the elevating type gondola can be raised and lowered outside the outer surface of the work gantry with a simple configuration.

また、簡易足場に形成されるウェブ部係止片の数は限られないため、更に、請求項4の如く、上記一方の先端部位に同ウェブ部係止片を形成してもよい。かかる構成下、同先端部位のウェブ部係止片を支持杭先端のウェブ部に係止し、同先端部位の内側のゴンドラ吊下具に昇降型ゴンドラを吊下げれば、簡易な構成で、作業用構台の外側面の内側において昇降型ゴンドラを昇降させることができる。   Moreover, since the number of the web part latching pieces formed in a simple scaffold is not restricted, the web part latching pieces may be further formed at the one end portion as in claim 4. Under such a configuration, if the web part locking piece at the tip part is locked to the web part at the tip of the support pile, and the lifting type gondola is suspended from the gondola hanger inside the tip part, the work can be done with a simple configuration. The elevating gondola can be raised and lowered inside the outer surface of the gantry.

これまでは、作業用構台を解体するための技術的思想として方法の形を採って説明を行ったが、かかる方法の実現に用いるための道具として有用な発明が成り立つことは当然に考えられる。そこで、請求項6にかかる発明は、所定間隔を空けて立設する支持杭を接続するとともに互いに所定の距離をもって対向する鋼材間に架渡される簡易足場であって、少なくとも、一方の先端部位から同簡易足場の中央側に所定距離接近した位置に、上記支持杭の先端部位に係止可能な先端部位係止片を形成し、かつ、長手側の両縁部であって上記一方の先端近傍を含む複数箇所に昇降型ゴンドラを吊下げるためのゴンドラ吊下具を形成した構成としてある。すなわち、かかる簡易足場を用いれば、簡易な構成で、簡易足場が架渡される鋼材が接続する各支持杭が形成する側面の両側において、昇降型ゴンドラに昇降動作を行わせることができる。   So far, the method has been described as a technical idea for dismantling the working gantry. However, it is obvious that the invention useful as a tool for realizing the method can be realized. Accordingly, the invention according to claim 6 is a simple scaffold that connects support piles that are erected at a predetermined interval and is spanned between steel members facing each other at a predetermined distance, from at least one tip portion. A tip part locking piece that can be locked to the tip part of the support pile is formed at a position close to the center side of the simplified scaffold, and both edges on the long side and near the one tip The gondola suspension tool for suspending the elevating gondola is formed at a plurality of locations including. That is, if such a simple scaffold is used, the lift type gondola can be lifted and lowered on both sides of the side surfaces formed by the support piles to which the steel material over which the simple scaffold is bridged is connected with a simple configuration.

また、昇降型ゴンドラと、略矩形に組まれた下方枠部材と昇降型ゴンドラを昇降動作および略水平移動を可能とした上で支持するゴンドラ支持部材と同下方枠部材とゴンドラ支持部材との上下の距離を少なくとも同昇降型ゴンドラの高さを越える距離に保ちつつ両部材を両端部位で接続する端部材とからなるゴンドラ支持体と、を備える構成としてもよい。
かかる解体作業用ゴンドラユニットを、解体の対象となる作業用構台の最上段に設置すれば、解体作業用ゴンドラユニット全体を移動させなくとも、ある一定範囲内において昇降型ゴンドラの昇降動作を行う位置を変えられるのため、解体作業の効率が上がる。
Further, a temperature descending type gondola, the gondola the support member and the lower frame member and the gondola supporting member for supporting the substantially are assembled into a rectangular with the lower frame member elevating type gondola on which enables lifting operation and a substantially horizontal movement It is good also as a structure provided with the gondola support body which consists of the end member which connects both members at both ends part, keeping the vertical distance at least the distance exceeding the height of the raising / lowering gondola .
If this dismantling work gondola unit is installed at the top of the work gantry to be dismantled, the lifting gondola can be moved up and down within a certain range without moving the entire dismantling work gondola unit. Change the efficiency of dismantling work.

以上説明したように、請求項1の発明によれば、作業用構台を少ない労力で、短時間かつ安全に解体することが可能な作業用構台解体方法を提供することができる。
また、請求項2の発明によれば、解体作業の効率がより高まる。
さらに、請求項3の発明によれば、解体作業の効率がより高まるとともに、各鋼材を作業用構台本体から分離させることも容易となる。
さらに、請求項4の発明によれば、簡易足場を容易に最上段の第一の鋼材間または第二の鋼材間に架渡すことができる。
さらに、請求項5の発明によれば、簡易足場を容易に最上段の第一の鋼材間または第二の鋼材間に架渡すことができるとともに、簡易な構成で、作業用構台の外側面の外側または内側において昇降型ゴンドラに昇降動作を行わせることができる。
さらに、請求項6の発明によれば、支持杭を夫々接続する鋼材間に、容易に架渡すことができるとともに、各鋼材が夫々接続する支持杭が形成する側面の両側において、昇降型ゴンドラに昇降動作を行わせる簡易足場を提供することができる。
さらに、昇降型ゴンドラの移動の自由を確保することで作業用構台の解体作業を効率よくさせる解体作業用ゴンドラユニットを提供することができる。
As described above, according to the first aspect of the present invention, it is possible to provide a working gantry disassembling method that can dismantle the working gantry in a short time and safely with less labor.
According to the invention of claim 2, the efficiency of the dismantling work is further increased.
Furthermore, according to the invention of claim 3, the efficiency of the dismantling work is further increased, and each steel material can be easily separated from the work gantry body.
Furthermore, according to the invention of claim 4, the simple scaffold can be easily spanned between the first steel materials or the second steel materials in the uppermost stage.
Furthermore, according to the invention of claim 5, the simple scaffold can be easily bridged between the uppermost first steel members or the second steel members, and the outer surface of the working gantry can be easily configured. The elevating gondola can be moved up and down on the outside or inside.
Furthermore, according to invention of Claim 6, while being able to easily span between the steel materials which each connect a support pile, on both sides of the side surface which the support pile to which each steel material connects, it is attached to a raising / lowering type gondola. A simple scaffold that can be moved up and down can be provided.
Furthermore, it is possible to provide a disassembling work gondola unit to efficiently dismantling working gantry by ensuring the freedom of movement of the temperature descending type gondola.

図1は、本願解体方法による解体の対象となる作業用構台を斜視図により示している。 同図に示す作業用構台100は、道路や橋などの建設現場において、かかる建設物を建設する際の作業用の足場として構築されるものである。同作業用構台100は、概略、高所作業用の足場領域として複数枚敷設される略矩形板状の覆工板70の長手方向及び幅方向に夫々所定の間隔を空けて立設する複数の支持杭10と、各支持杭10を接続する各鋼材によって構築されている。すなわち、作業用構台100を上から見た場合に、各支持杭10は、縦横方向それぞれに所定の空けて連なる格子点上に立設する。そして、同幅方向に並ぶ支持杭10の各列を、支持杭10の高さ方向に所定の間隔をもって複数の第一水平鋼材20が略水平方向に接続する。また、同長手方向に並ぶ支持杭10の各列は、複数の第二水平鋼材30によって略水平に接続される。さらに、各支持杭10と第一水平鋼材20とによって構成される各格子枠には、補強のための二本の第一斜鋼材41がクロス状に取り付けられている。同様に、各支持杭10と第二水平鋼材30とによって構成される各格子枠には、第二斜鋼材42がクロス状に取り付けられている。ただし、図の見易さのため、作業用構台100内部の各鋼材は適宜図示を省略してある。   FIG. 1 is a perspective view showing a working gantry to be dismantled by the dismantling method of the present application. The work gantry 100 shown in the figure is constructed as a working scaffold when constructing such a construction at a construction site such as a road or a bridge. The work gantry 100 generally includes a plurality of erected plates that are erected at predetermined intervals in the longitudinal direction and the width direction of a substantially rectangular plate-like lining plate 70 that is laid as a scaffolding area for high-altitude work. The support pile 10 and each steel material which connects each support pile 10 are comprised. That is, when the work gantry 100 is viewed from above, the support piles 10 are erected on lattice points that are continuous with each other in the vertical and horizontal directions. And the some 1st horizontal steel materials 20 connect the row | line | column of the support pile 10 located in a line with the same width direction with the predetermined space | interval in the height direction of the support pile 10 in a substantially horizontal direction. Moreover, each row | line | column of the support pile 10 located in a line with the same longitudinal direction is connected substantially horizontally by the some 2nd horizontal steel material 30. FIG. Furthermore, two first diagonal steel members 41 for reinforcement are attached to each lattice frame constituted by each support pile 10 and the first horizontal steel member 20 in a cross shape. Similarly, a second diagonal steel material 42 is attached to each lattice frame constituted by each support pile 10 and the second horizontal steel material 30 in a cross shape. However, for easy understanding of the drawing, each steel material inside the working gantry 100 is appropriately omitted.

同様に図示を省略しているが、作業用構台100の最上段には、同作業用構台100自体の長手方向に渡された複数の主桁及び各主桁上を覆って作業用の足場面積を確保する覆工板70が敷設される。ここで、略矩形板状の覆工板70が主桁上においてどの様な向きで敷設されるかは、覆工板70の縦横の長さや主桁間の距離等の要因によって定まるが、本実施形態においては、主桁間にその長手方向が渡されるように各覆工板70を敷設することとする。従って、第一水平鋼材20が略水平方向に各支持杭10を接続する方向は、同図においては、図中の覆工板70の幅方向となり、第二水平鋼材30が略水平方向に各支持杭10を接続する方向は、図中の覆工板70の長手方向となる。
以下、上記作業用構台100を解体する手順について説明する。
Similarly, although not shown in the figure, the uppermost stage of the work gantry 100 has a plurality of main girders passed in the longitudinal direction of the work gantry 100 itself and the work scaffolding area covering each main girder. A lining plate 70 that secures the above is laid. Here, the orientation in which the substantially rectangular plate-like lining plate 70 is laid on the main girder is determined by factors such as the length and width of the lining plate 70 and the distance between the main girders. In the embodiment, each lining plate 70 is laid so that the longitudinal direction is passed between the main girders. Therefore, the direction in which the first horizontal steel material 20 connects the support piles 10 in the substantially horizontal direction is the width direction of the lining plate 70 in the figure, and the second horizontal steel material 30 is in the substantially horizontal direction. The direction in which the support pile 10 is connected is the longitudinal direction of the lining plate 70 in the drawing.
Hereinafter, a procedure for disassembling the working gantry 100 will be described.

図2は、ゴンドラユニット50を斜視図により示している。
上記ゴンドラユニット50は、ゴンドラ61,62と、鋼材を略直方体状に組んで形成したゴンドラ支持枠体51とからなる。同ゴンドラ支持枠体51は、同ゴンドラ支持枠体51の底面を縁取る下方枠52と、上面を縁取る上方枠53と、下方枠52と上方枠53との上下の距離を所定距離に保ちつつその両端部位で両枠を接続する端枠54a,54bとによって構成される。
上方枠53は、その長手方向を構成する二本の鋼材(以下、長鋼材53a,53b)によって二台のゴンドラ61,62を支持する。ゴンドラ61,62は、それぞれ懸持部材61a,62aによって、ワイヤ61b,62bを介して吊り下げられた状態となっている。そして、長鋼材53a,53bが各懸持部材61a,62aを両側から支持することで、上方枠53がゴンドラ61,62を吊り下げ支持する。ゴンドラ61,62は、ゴンドラ支持枠体51の枠体内に収容できる大きさであるとともに、少なくとも一人以上の人間が乗り込める大きさとする。また、ゴンドラ61,62は、図示しないウインチ駆動部を夫々備えることにより、所定の高低差内で自由に上昇・降下可能であるとする。
FIG. 2 shows the gondola unit 50 in a perspective view.
The gondola unit 50 includes gondolas 61 and 62 and a gondola support frame 51 formed by assembling steel materials in a substantially rectangular parallelepiped shape. The gondola support frame 51 maintains a predetermined distance between the lower frame 52 that borders the bottom surface of the gondola support frame 51, the upper frame 53 that borders the upper surface, and the upper and lower frames 52 and 53. However, it is comprised by the end frames 54a and 54b which connect both frames at the both ends.
The upper frame 53 supports the two gondolas 61 and 62 by two steel materials (hereinafter referred to as long steel materials 53a and 53b) constituting the longitudinal direction thereof. The gondolas 61 and 62 are suspended by the suspension members 61a and 62a via the wires 61b and 62b, respectively. The long steel members 53a and 53b support the suspension members 61a and 62a from both sides, so that the upper frame 53 suspends and supports the gondolas 61 and 62. The gondolas 61 and 62 are of a size that can be accommodated in the frame of the gondola support frame 51 and that can accommodate at least one person. Further, it is assumed that the gondolas 61 and 62 are each provided with a winch drive unit (not shown) so that the gondola 61 and 62 can freely rise and fall within a predetermined height difference.

ここで、ゴンドラ支持枠体51が各ゴンドラ61,62を支持する態様は限定されるものではない。例えば、同図中の拡大図に示すように、長鋼材53a,53bとして、上下の縁部において、上方枠53の内側に向かって突出するとともに同鋼材の長手方向に連続して形成されたフランジを有するものを用いる。そして、長鋼材53a,53bの互いに相対する面と、前記各フランジによって囲まれた凹部を、それぞれ支持兼誘導用空間53a1,53b1とする。支持兼誘導用空間53a1,53b1内において、各ゴンドラ61,62を吊下げる懸持部材61a,62aの両側が夫々外れないように保持しつつ、同懸持部材61a,62aを長鋼材53a,53bの長手方向に略水平移動可能とする。当該構成とすれば、各ゴンドラ61,62は、ゴンドラ支持枠体51に吊られた状態において、長鋼材53a,53bの長さの範囲内で自由に略水平移動することができる。   Here, the manner in which the gondola support frame 51 supports the gondolas 61 and 62 is not limited. For example, as shown in the enlarged view in the figure, as long steel materials 53a and 53b, flanges that protrude toward the inside of the upper frame 53 at the upper and lower edges and are continuously formed in the longitudinal direction of the steel materials. Use what has. The opposing surfaces of the long steel members 53a and 53b and the recesses surrounded by the flanges are referred to as support and guidance spaces 53a1 and 53b1, respectively. In the supporting and guiding spaces 53a1 and 53b1, the suspension members 61a and 62a are held so that both sides of the suspension members 61a and 62a for suspending the gondolas 61 and 62 are not detached from each other, and the suspension members 61a and 62a are long steel members 53a and 53b. It is possible to move substantially horizontally in the longitudinal direction. If it is set as the said structure, in the state hung by the gondola support frame 51, each gondola 61 and 62 can move substantially horizontally freely within the range of the length of the long steel materials 53a and 53b.

加えて、上方枠53と下方枠52と端枠54a,54bとによって形成される6面のうち、上面や長手側の両側面を金網で覆ってもよい。かかる構成とすれば、ゴンドラ61,62に乗った作業者の頭上が金網でカバーされた状態となるため、クレーンに吊られた鋼材の落下等、不意の落下物等から作業者を守ることができる。   In addition, among the six surfaces formed by the upper frame 53, the lower frame 52, and the end frames 54a and 54b, the upper surface or both side surfaces on the long side may be covered with a wire mesh. With such a configuration, since the overhead of the worker riding on the gondola 61, 62 is covered with the wire mesh, it is possible to protect the worker from unexpected fallen objects such as the fall of steel suspended from the crane. it can.

図3は、ゴンドラユニット50を作業用構台100の最上段に設置した状態を上方から示している。ただし、同図では、本来上方から見える第一水平鋼材20あるいは第一斜鋼材41の部位の図示を省略してある。
ここで、作業用構台100を上方から見たときに第一水平鋼材20又は第一斜鋼材41と第二水平鋼材30とによって形成される略矩形の格子枠を基準格子枠Aとする。ゴンドラ61,62を用いる解体作業は、同基準格子枠A下に連なる、支持杭10と第一水平鋼材20と第二水平鋼材30と第一斜鋼材41と第二斜鋼材42とによって形成される空間(以下、基準空間B)毎に行われる。同図に示すように、ゴンドラユニット50は作業用構台100の最上段において、基準格子枠A1の幅(基準格子枠A1を形成する第二水平鋼材30の部位の長さ)内に収まるように上方から設置される。なお、ゴンドラユニット50を作業用構台100上に設置するためのクレーン等の重機類は図示を省略してある。また、ゴンドラユニット50が設置された基準格子枠A1及び基準格子枠A1と覆工板70の長手方向に連なる他の基準格子枠A2,A3以外の領域には、作業スペースを確保するための覆工板70が被せられている。
FIG. 3 shows a state where the gondola unit 50 is installed on the uppermost stage of the work gantry 100 from above. However, in the same figure, illustration of the site | part of the 1st horizontal steel material 20 or the 1st diagonal steel material 41 originally visible from upper direction is abbreviate | omitted.
Here, a substantially rectangular lattice frame formed by the first horizontal steel member 20 or the first oblique steel member 41 and the second horizontal steel member 30 when the work gantry 100 is viewed from above is referred to as a reference lattice frame A. The dismantling work using the gondola 61, 62 is formed by the support pile 10, the first horizontal steel material 20, the second horizontal steel material 30, the first oblique steel material 41, and the second oblique steel material 42, which are continuous under the reference grid frame A. For each space (hereinafter referred to as reference space B). As shown in the figure, the gondola unit 50 fits within the width of the reference grid frame A1 (the length of the portion of the second horizontal steel material 30 forming the reference grid frame A1) at the uppermost stage of the work gantry 100. Installed from above. In addition, heavy machinery such as a crane for installing the gondola unit 50 on the work gantry 100 is not shown. In addition, the reference grid frame A1 in which the gondola unit 50 is installed and the reference grid frame A1 and a cover other than the reference grid frames A2 and A3 connected in the longitudinal direction of the lining plate 70 are covered to secure a work space. A work plate 70 is covered.

本実施形態においては、ゴンドラユニット50の長手方向の長さを、基準格子枠Aの長手方向の長さ(つまり、覆工板70の幅方向における支持杭10の立設間隔)よりも長く設定する。当該設定とすれば、作業用構台100の最上段において、互いに対向して一の基準格子枠Aの二辺となっている第二水平鋼材30の上に、同ゴンドラユニット50を設置することができる。さらに、同ゴンドラユニット50の下方枠52及び上方枠53が、その長手方向において、ゴンドラユニット50の設置対象となった基準格子枠Aの外側まで延出するため、同設置対象の基準格子枠Aの外側においても、上記ゴンドラ61,62を昇降させることができる。なお、ゴンドラユニット50を設置する基準格子枠Aは、その時点において、作業用構台100の外側面に含まれる第二水平鋼材30を有する基準格子枠Aのいずれかとする。すなわち、解体作業は、施設されている作業用構台100の端部から行っていく。   In the present embodiment, the length of the gondola unit 50 in the longitudinal direction is set to be longer than the length of the reference lattice frame A in the longitudinal direction (that is, the standing interval of the support pile 10 in the width direction of the lining plate 70). To do. With this setting, the gondola unit 50 can be installed on the second horizontal steel member 30 that is opposite to each other and forms two sides of one reference lattice frame A at the uppermost stage of the work gantry 100. it can. Further, since the lower frame 52 and the upper frame 53 of the gondola unit 50 extend in the longitudinal direction to the outside of the reference lattice frame A on which the gondola unit 50 is installed, the reference lattice frame A to be installed is the same. The gondola 61 and 62 can be raised and lowered also on the outside. Note that the reference grid frame A in which the gondola unit 50 is installed is any one of the reference grid frames A having the second horizontal steel members 30 included in the outer surface of the work gantry 100 at that time. That is, the dismantling work is performed from the end of the work gantry 100 that is provided.

図4は、第一水平鋼材20及び第一斜鋼材41を除去する際の説明図である。
同図は、敷設される覆工板70の幅方向を向く作業用構台100の側面を示しており、簡単のため、ゴンドラユニット50の設置対象となった基準格子枠A1の下方に連なる基準空間B1のみを示している。
本実施形態においては、二台のゴンドラ61,62を夫々、基準空間B1内であって、各第一水平鋼材20及び各第一斜鋼材41の両端付近を通過する位置で昇降させる。つまり、各第一水平鋼材20又は第一斜鋼材41を両側から切断し、除去する。
FIG. 4 is an explanatory diagram when the first horizontal steel material 20 and the first oblique steel material 41 are removed.
This figure shows the side surface of the work gantry 100 facing the width direction of the lining plate 70 to be laid. For the sake of simplicity, the reference space connected below the reference lattice frame A1 on which the gondola unit 50 is installed. Only B1 is shown.
In the present embodiment, the two gondolas 61 and 62 are moved up and down at positions that pass through the first horizontal steel material 20 and the vicinity of both ends of the first oblique steel material 41 in the reference space B1. That is, each 1st horizontal steel material 20 or the 1st diagonal steel material 41 is cut | disconnected from both sides, and is removed.

同図の(1)は、ゴンドラ61,62をゴンドラ支持枠体51の高さから降下させ、第一斜鋼材41aを切断、除去する際の各高さ位置でその降下動作を止めた場合を示している。ゴンドラ61,62の各高さ位置をかかる位置としたら、先ず、ゴンドラ61,62の何れか一方に乗った作業者が、第一斜鋼材41aの端部付近を切断する。次に、同第一斜鋼材41aを図示しないクレーンのフック等によって確実に保持する。当該状況において、上記切断した作業者が乗るゴンドラとは別のゴンドラに乗った作業者が第一斜鋼材41aの端部付近を切断すれば、第一斜鋼材41aは地上に落下することなく、作業用構台100から完全に分離し、除去される。その後、当該第一斜鋼材41aを上記クレーン等によって所定の資材置き場に移動させる。   (1) of the figure shows a case where the gondola 61, 62 is lowered from the height of the gondola support frame 51 and the lowering operation is stopped at each height position when the first diagonal steel material 41a is cut and removed. Show. If each height position of the gondola 61, 62 is such a position, first, an operator riding on either one of the gondola 61, 62 cuts the vicinity of the end portion of the first oblique steel material 41a. Next, the first inclined steel member 41a is securely held by a crane hook or the like (not shown). In this situation, if an operator who rides on a gondola different from the gondola on which the above-mentioned worker rides cuts the vicinity of the end of the first diagonal steel material 41a, the first diagonal steel material 41a does not fall to the ground, Completely separated from the working gantry 100 and removed. Thereafter, the first diagonal steel member 41a is moved to a predetermined material storage by the crane or the like.

このように、上記第一斜鋼材41a及びこれと略平行に取り付けられている他の第一斜鋼材41については、ゴンドラ61,62を降下させていく過程で、その都度、各鋼材の両端付近の切断に適切な高さ位置でゴンドラ61,62を止め、上記切断、除去作業を繰り返す。一方、上記第一斜鋼材41aとは交差する角度で取り付けられている各第一斜鋼材41については、ゴンドラ61,62が一旦作業用構台100の最下段まで降下した後の、上昇過程において、各鋼材の両端付近の切断に適切な高さ位置でゴンドラ61,62を止め、上記切断、除去作業を繰り返す。ただし、当該各第一斜鋼材41の切断、除去の順序は一例に過ぎない。各第一水平鋼材20についても、降下過程あるいは上昇過程において、各鋼材の両端付近の切断に適切な高さ位置でゴンドラ61,62を止め、上記切断、除去作業を繰り返す。その結果、同図の(2)に示すように、ゴンドラ61,62をゴンドラ支持枠体51内に再び収容するまでに、上記基準空間B1の形成に用いられる全ての第一水平鋼材20と第一斜鋼材41とを切断し、除去することができる。   As described above, in the process of lowering the gondolas 61 and 62, the first inclined steel member 41a and the other first inclined steel member 41 attached substantially parallel to the first inclined steel member 41a are in the vicinity of both ends of each steel member. The gondola 61, 62 is stopped at a height suitable for cutting, and the above cutting and removing operations are repeated. On the other hand, for each first oblique steel material 41 attached at an angle intersecting with the first oblique steel material 41a, in the ascending process after the gondola 61, 62 once descends to the lowest stage of the working gantry 100, The gondola 61, 62 is stopped at a height suitable for cutting near both ends of each steel material, and the above cutting and removing operations are repeated. However, the order of cutting and removing each first oblique steel material 41 is merely an example. For each of the first horizontal steel members 20, the gondola 61, 62 is stopped at a height suitable for cutting near both ends of each steel member in the descending process or the ascending process, and the above cutting and removing operations are repeated. As a result, as shown in (2) of the figure, all the first horizontal steel members 20 and the first horizontal steel members 20 used for forming the reference space B1 before the gondolas 61 and 62 are accommodated in the gondola support frame 51 again. The monoclinic steel material 41 can be cut and removed.

なお、上記基準空間B1の形成に用いられる第一水平鋼材20と第一斜鋼材41は、同図紙面の手前側と奥側とに夫々存在する。ここで、基準空間B1の最上段にゴンドラユニット50を設置した際のゴンドラ61,62の昇降過程において、かかる手前側と奥側とに夫々存在する第一水平鋼材20及び第一斜鋼材41の全てを切断、除去する必要はない。つまり、基準空間B1の形成に用いられる第一水平鋼材20と第一斜鋼材41とは、隣り合う他の基準空間B2の形成にも用いられている場合があり、かかる隣の空間について同様の作業を行う際に切断、除去できるからである。従って、ある基準空間Bの最上段にゴンドラユニット50を設置した際のゴンドラ61,62の昇降過程においては、少なくとも、その基準空間Bの形成にのみ用いられている第一水平鋼材20と第一斜鋼材41を全て切断、除去するものとする。   In addition, the 1st horizontal steel material 20 and the 1st diagonal steel material 41 used for formation of the said reference | standard space B1 exist in the near side and the back | inner side of the figure paper surface, respectively. Here, in the ascending / descending process of the gondola 61, 62 when the gondola unit 50 is installed at the uppermost stage of the reference space B1, the first horizontal steel material 20 and the first oblique steel material 41 respectively present on the near side and the far side are respectively present. It is not necessary to cut and remove everything. That is, the first horizontal steel material 20 and the first oblique steel material 41 used for forming the reference space B1 may be used for forming another adjacent reference space B2, and the same applies to the adjacent space. This is because it can be cut and removed when performing work. Accordingly, in the process of raising and lowering the gondola 61 and 62 when the gondola unit 50 is installed at the uppermost stage of a certain reference space B, at least the first horizontal steel material 20 and the first horizontal steel material 20 used only for forming the reference space B are used. It is assumed that all the oblique steel material 41 is cut and removed.

図5は、ゴンドラユニット50を作業用構台100の最上段に設置した状態を上方から示している。
第一水平鋼材20及び第一斜鋼材41の切断、除去を行った後は、ゴンドラ61,62が作業用構台100の外側面に含まれる第二水平鋼材30又は第二斜鋼材42を左右から挟んだ状態で昇降できる位置に、ゴンドラ61,62を夫々略水平移動させる。つまり、一の基準空間Bの形成に用いられる各鋼材の切断又は除去を行う限りにおいては、ゴンドラユニット50全体を移動させる必要はなく、昇降動作を行うゴンドラ61,62の位置のみを変更する。
なお、ゴンドラ61,62が第二水平鋼材30等を左右から挟んだ状態で昇降させるとしたのは、支持杭10の側面に取り付けられた各第二水平鋼材30や第二斜鋼材42を切断する際に、作業用構台100の外側からの作業の方がし易かったり、上記基準空間B1内からの作業の方がし易かったりするからである。
FIG. 5 shows a state in which the gondola unit 50 is installed on the uppermost stage of the work gantry 100 from above.
After cutting and removing the first horizontal steel material 20 and the first diagonal steel material 41, the gondola 61, 62 removes the second horizontal steel material 30 or the second diagonal steel material 42 included on the outer surface of the work gantry 100 from the left and right. The gondolas 61 and 62 are moved approximately horizontally to positions where they can be lifted and lowered in a sandwiched state. That is, as long as each steel material used for forming one reference space B is cut or removed, it is not necessary to move the entire gondola unit 50, and only the positions of the gondola 61 and 62 that perform the lifting and lowering operation are changed.
The reason that the gondola 61, 62 moves up and down with the second horizontal steel material 30 etc. sandwiched from the left and right is to cut the second horizontal steel material 30 and the second diagonal steel material 42 attached to the side surface of the support pile 10. This is because it is easier to work from the outside of the work gantry 100 or from the reference space B1.

図6は、第二水平鋼材30及び第二斜鋼材42を切断する際の説明図である。
同図は、覆工板70の長手方向を向く作業用構台100の外側面を正面から示しており、基準空間Bが作業用構台100自体の幅方向に三つ連なった状態を示している。ゴンドラユニット50の設置位置は、図3〜5と同様に、基準空間B1の最上段である。なお、同図においては、作業用構台100の外側面の外側を昇降するゴンドラ61のみ図示し、ゴンドラ62の図示を省略しているが、ゴンドラ62も基本的にゴンドラ61と同様の動きをする。
同図(1)に示すように、ゴンドラ61(62)を下降又は上昇させ、最上段の第二水平鋼材30以外の第二水平鋼材30と第二斜鋼材42とを切断する。つまり、ゴンドラ61(62)を昇降させ、切断対象となる各第二水平鋼材30または第二斜鋼材42の各高さ位置に移動した際に昇降動作を止め、各鋼材の切断を行う。
FIG. 6 is an explanatory diagram when the second horizontal steel material 30 and the second oblique steel material 42 are cut.
The figure shows the outer surface of the working gantry 100 facing the longitudinal direction of the lining plate 70 from the front, and shows a state in which the reference space B is three-connected in the width direction of the working gantry 100 itself. The installation position of the gondola unit 50 is the uppermost stage of the reference space B1 as in FIGS. In the figure, only the gondola 61 that moves up and down the outside surface of the work gantry 100 is shown, and the gondola 62 is omitted, but the gondola 62 basically moves in the same manner as the gondola 61. .
As shown in FIG. 1A, the gondola 61 (62) is lowered or raised to cut the second horizontal steel material 30 other than the uppermost second horizontal steel material 30 and the second oblique steel material. That is, when the gondola 61 (62) is moved up and down and moved to each height position of each second horizontal steel material 30 or second oblique steel material 42 to be cut, the lifting operation is stopped and each steel material is cut.

この場合、ゴンドラ61(62)が作業用構台100の最下段まで降下する過程で切断可能な第二水平鋼材30及び第二斜鋼材42を全て切断してもよいし、半数程度切断し、残りは上昇過程において切断するようにしてもよい。そして、同図(2)に示すように、ゴンドラ61(62)をゴンドラ支持枠体51内に再び収容するまでに、基準空間B1の外側面の形成に用いられる第二水平鋼材30と第二斜鋼材42とであって、最上段の第二水平鋼材30以外の各鋼材を切断する。   In this case, the second horizontal steel material 30 and the second slant steel material 42 that can be cut in the process in which the gondola 61 (62) descends to the lowest level of the working gantry 100 may be cut, or about half of them and the rest May be cut in the ascending process. Then, as shown in FIG. 2B, the second horizontal steel material 30 and the second horizontal steel material 30 used for forming the outer surface of the reference space B1 until the gondola 61 (62) is accommodated in the gondola support frame 51 again. Each steel material other than the uppermost second horizontal steel material 30 is cut with the diagonal steel material 42.

本実施形態においては、第二水平鋼材30を構成する各部材及び第二斜鋼材42は、支持杭10の側面であって作業用構台100の外側に面する側面に取付けられているものと、支持杭10の側面であって基準空間B1の内側に面する側面に取付けられているものとがある。従って、上記作業用構台100の外側に面する側面に取付けられているものは、作業用構台100の外側において昇降するゴンドラ61に乗る作業者が切断し、基準空間B1の内側に面する側面に取付けられているものは、同基準空間B1内を昇降するゴンドラ62に乗る作業者が切断する。   In the present embodiment, each member constituting the second horizontal steel material 30 and the second oblique steel material 42 are attached to the side surface of the support pile 10 facing the outside of the work gantry 100, Some are attached to the side surface of the support pile 10 that faces the inside of the reference space B1. Therefore, what is attached to the side facing the outside of the working gantry 100 is cut off by the worker who rides the gondola 61 that moves up and down outside the working gantry 100, and the side facing the inside of the reference space B1. What is attached is cut by an operator who rides the gondola 62 that moves up and down in the reference space B1.

ここで、第一水平鋼材20及び第一斜鋼材41は切断した上で除去し、第二水平鋼材30及び第二斜鋼材42は切断のみを行うとしたのは、以下の理由による。つまり、第一水平鋼材20及び第一斜鋼材41は、第二水平鋼材30及び第二斜鋼材42に比べ通常長い。かかる長い鋼材を途中で切断しただけの状態で、依然元の半分近い長さの鋼材が各支持杭10に接続されている場合には、最終的に各支持杭10を傾倒させ除去する際に、当該長い鋼材が作業の邪魔になる。そのため、第一水平鋼材20及び第一斜鋼材41については、切断した上で除去し、その殆どの部分を支持杭10から分離させるとした。   Here, the first horizontal steel material 20 and the first diagonal steel material 41 are cut and removed, and the second horizontal steel material 30 and the second diagonal steel material 42 are only cut for the following reason. That is, the first horizontal steel material 20 and the first diagonal steel material 41 are usually longer than the second horizontal steel material 30 and the second diagonal steel material 42. When a steel material having a length close to half of the original length is still connected to each support pile 10 in a state in which such a long steel material is only cut in the middle, when each support pile 10 is finally tilted and removed. The long steel material interferes with the work. Therefore, about the 1st horizontal steel material 20 and the 1st diagonal steel material 41, it cut and removed, and it was supposed that the most part was isolate | separated from the support pile 10. FIG.

一方、第二水平鋼材30及び第二斜鋼材42はそれ程の長さを有しておらず、中途部位で切断されただけで各支持杭10に接続されている場合であっても、各支持杭10を傾倒させ除去する際の作業の邪魔にはならない。従って、作業上の効率を考慮して、第二水平鋼材30及び第二斜鋼材42については、その中途部位を切断するのみとした。
ただし、各鋼材の切断や除去を上記のように限定する必要は必ずしも無く、例えば、ある鋼材が各支持杭10に対してボルトなどで固定されている場合に、同ボルトによる固定を解除して、当該鋼材の全体を各支持杭10から分離させ、除去するとしてもよい。また、各鋼材の長さが所定の範囲に収まる短さであれば、全ての第一水平鋼材20、第二水平鋼材30、第一斜鋼材41、第二斜鋼材42について、その中途部位を切断するのみとしてもよい。
On the other hand, even if the second horizontal steel material 30 and the second diagonal steel material 42 do not have such a length and are connected to the support piles 10 just by being cut at a midpoint, It does not interfere with the work when the pile 10 is tilted and removed. Therefore, in consideration of work efficiency, the second horizontal steel member 30 and the second oblique steel member 42 are only cut at their midpoints.
However, it is not always necessary to limit the cutting and removal of each steel material as described above. For example, when a certain steel material is fixed to each support pile 10 with a bolt or the like, the fixing with the bolt is released. The whole steel material may be separated from each support pile 10 and removed. Further, if the length of each steel material is short enough to fall within a predetermined range, the intermediate portion of all of the first horizontal steel material 20, the second horizontal steel material 30, the first oblique steel material 41, and the second oblique steel material 42 are defined. It is good also only to cut | disconnect.

上述の通り、基準空間B1の最上段にゴンドラユニット50を設置した状態で、各鋼材に対する切断及び除去、または切断作業を終えたら、次に、ゴンドラユニット50をクレーン等で移動させる。そして、基準空間B1と覆工板70の長手方向に連なる他の基準空間B2,B3の最上段に順にゴンドラユニット50を設置し、各基準空間内外において、同様に各鋼材の切断及び除去、または切断作業を行う。その結果、上記基準空間B1〜B3の形成に用いられる各支持杭10であって、作業用構台100の外側面に含まれる最上段の第二水平鋼材30によって各先端部位を接続された各支持杭10は、それ以外の支持杭10とは完全に分離した状態となる。従って、これまでに説明した作業が、請求項1の、ゴンドラユニット設置工程と第一解体工程とに対応する。   As described above, after the cutting and removal of each steel material or the cutting operation is completed in a state where the gondola unit 50 is installed at the uppermost stage of the reference space B1, the gondola unit 50 is then moved with a crane or the like. And the gondola unit 50 is installed in order on the uppermost stage of the other reference spaces B2 and B3 that are continuous in the longitudinal direction of the reference space B1 and the lining plate 70, and each steel material is similarly cut and removed in and out of each reference space, or Perform cutting work. As a result, each of the support piles 10 used for forming the reference spaces B1 to B3, each of which is connected to each tip portion by the uppermost second horizontal steel member 30 included in the outer surface of the work gantry 100. The pile 10 is in a state of being completely separated from the other support piles 10. Therefore, the operations described so far correspond to the gondola unit installation step and the first disassembly step of claim 1.

このように、各鋼材の切断、除去作業時の移動手段として、上記ゴンドラユニット50を用いることにより、作業者は、切断等を行った鋼材から他の切断等の対象となる鋼材に、短時間で容易かつ安全に移動することができる。その結果、作業用構台100の解体作業の全体的な効率を、従来に比べて飛躍的に上げることができる。また、作業者は、自身で支持杭10を登り降りする必要が無いため、その作業量の殆どを鋼材の切断等、解体作業自体に充てることができる。よって、一人当たりの解体作業量が向上し、少ない人員で同作業用構台100を解体できる。   As described above, by using the gondola unit 50 as a moving means at the time of cutting and removing each steel material, the operator can change the steel material that has been cut or the like from the steel material to be subjected to other cutting or the like for a short time. Can be moved easily and safely. As a result, the overall efficiency of the dismantling work of the working gantry 100 can be dramatically increased as compared to the conventional case. Moreover, since it is not necessary for the worker to climb up and down the support pile 10 himself, most of the work amount can be applied to the dismantling work such as cutting of the steel material. Therefore, the amount of dismantling work per person is improved, and the work gantry 100 can be disassembled with a small number of personnel.

上記ゴンドラユニット50を用いることは、以下のような効果をも生じさせる。上述したように、ゴンドラ61,62に乗る作業者の頭上には、常に略直方体状の枠体状に組まれたゴンドラ支持枠体51が設置されている。そのため、クレーン等のワイヤに吊られた鋼材が荷揺れを起こし、同鋼材を吊ったワイヤが作業者の側に振れた場合にも、同ワイヤの中途部位が上記ゴンドラ支持枠体51の上方枠53や下方枠52に当たる。その結果、鋼材を吊った同ワイヤが振れても、その先端の振り幅が減少し、同ワイヤに吊られた鋼材が作業者の乗ったゴンドラ61,62に接触する危険性が極力抑えられる。   The use of the gondola unit 50 also produces the following effects. As described above, the gondola support frame 51 that is always assembled in the shape of a substantially rectangular parallelepiped frame is installed on the head of the worker who rides the gondola 61 and 62. Therefore, even when a steel material suspended on a wire such as a crane causes a load swing and the wire suspended from the steel material swings toward the operator, the middle part of the wire is the upper frame of the gondola support frame 51. 53 and the lower frame 52. As a result, even if the wire with the steel material is swung, the swing width at the tip of the wire is reduced, and the risk that the steel material suspended on the wire comes into contact with the gondolas 61 and 62 on which the operator rides is suppressed as much as possible.

次に、請求項1の足場架渡し工程以下に対応する手順について説明する。
図7は、簡易足場を斜視図により示している。
同図に示すように、簡易足場80は、二本の長鋼材81a,81bと、同長鋼材81a,81bを略平行に保ち両者を接続する二本の短鋼材82a,82bとによって、略矩形に組まれた形状となっている。また、短鋼材82aは、同簡易足場80の一端において、長鋼材81aと長鋼材81bとの端部同士を接続しており、短鋼材82bは、同簡易足場80の他端側において、長鋼材81aと長鋼材81bをその端部同士ではなく、中途部分同士で接続している。つまり、長鋼材81a,81bは、短鋼材82bと接続する部位よりも更に延出している。
Next, the procedure corresponding to the scaffold transfer step and subsequent steps of claim 1 will be described.
FIG. 7 is a perspective view of a simple scaffold.
As shown in the figure, the simple scaffold 80 is substantially rectangular by two long steel members 81a and 81b and two short steel members 82a and 82b that keep the long steel members 81a and 81b substantially parallel and connect them. It has a shape that is assembled. Further, the short steel material 82 a connects the ends of the long steel material 81 a and the long steel material 81 b at one end of the simple scaffold 80, and the short steel material 82 b is connected to the long steel material 82 at the other end of the simple scaffold 80. 81a and the long steel material 81b are connected not in the end portions but in the midway portions. That is, the long steel materials 81a and 81b extend further than the portion connected to the short steel material 82b.

長鋼材81a,81bと短鋼材82a,82bとによって囲まれた範囲は、その上で作業者が作業できるように、所定の強度を有するメッシュ部材83によって覆われている。また、上記短鋼材82aの略中央には、下向きにウェブ部係止片84が突設されている。ウェブ部係止片84は、対向する側面間に所定の隙間を設けて突設された二片の係止片84a,84bとからなる。かかる構成の簡易足場80は、後述するように、作業用構台100の最上段における第二水平鋼材30間の移動手段として用いられる。   A range surrounded by the long steel members 81a and 81b and the short steel members 82a and 82b is covered with a mesh member 83 having a predetermined strength so that an operator can work on the range. Further, a web portion locking piece 84 projects downward from the approximate center of the short steel material 82a. The web portion locking piece 84 includes two pieces of locking pieces 84a and 84b that are provided with a predetermined gap between opposing side surfaces. The simple scaffold 80 having such a configuration is used as a moving means between the second horizontal steel members 30 at the uppermost stage of the work gantry 100 as will be described later.

図8は、簡易足場80を作業用構台100の最上段に設置した状態を上方から示している。
簡易足場80は、上記ゴンドラユニット50を移動させた上で、上記基準空間B1〜B3の形成に用いられる第二水平鋼材30であって、上記ゴンドラ61,62を用いた各鋼材の切断処理によっては切断されなかった最上段の第二水平鋼材30間に架渡される。つまり、作業用構台100の外側面に含まれる最上段の第二水平鋼材30、及び当該第二水平鋼材30が各先端部位を接続する支持杭10は、作業用構台100の他の部分とは一切接続していない状態であるため、同簡易足場80を架渡し、作業用構台100の外側面に含まれる最上段の第二水平鋼材30までの移動手段を確保する。
FIG. 8 shows a state where the simple scaffold 80 is installed on the uppermost stage of the work gantry 100 from above.
The simple scaffold 80 is the second horizontal steel member 30 used for forming the reference spaces B1 to B3 after the gondola unit 50 is moved, and is obtained by cutting each steel member using the gondolas 61 and 62. Is bridged between the uppermost second horizontal steel members 30 that are not cut. That is, the uppermost second horizontal steel material 30 included in the outer surface of the work gantry 100 and the support pile 10 to which the second horizontal steel material 30 connects the respective tip portions are different from other parts of the work gantry 100. Since it is in a state where it is not connected at all, the same scaffold 80 is transferred and a moving means to the uppermost second horizontal steel member 30 included in the outer surface of the work gantry 100 is secured.

簡易足場80を最上段の第二水平鋼材30間に架渡す際の具体的な態様について説明する。上述したように、簡易足場80の一端には上記ウェブ部係止片84が突設されている。そこで、同ウェブ部係止片84が設けられている側の一端を、同外側面に含まれる最上段の第二水平鋼材30にまで到達させる。そして、同ウェブ部係止片84を同第二水平鋼材30が接続する何れかの支持杭10の先端に係止させることにより、簡易足場80の一端を、同外側面に含まれる最上段の第二水平鋼材30側に架け止める。本実施形態においては、支持杭10としてH型鋼を使用する。従って、上記係止片84aと係止片84bとによって、H型鋼のフランジ同士を接続するウェブ部分を挟むようにして上記ウェブ部係止片84を係止することで、容易かつ確実に、簡易足場80の一端を、同外側面に含まれる最上段の第二水平鋼材30側に架け止めることができる。   A specific mode when the simple scaffold 80 is bridged between the uppermost second horizontal steel members 30 will be described. As described above, the web portion locking piece 84 projects from one end of the simple scaffold 80. Therefore, one end on the side where the web portion locking piece 84 is provided is made to reach the uppermost second horizontal steel member 30 included in the outer side surface. And the one end of the simple scaffold 80 is made into the uppermost stage contained in the outer side surface by making the web part latching piece 84 latch to the front-end | tip of any support pile 10 to which the said 2nd horizontal steel material 30 connects. Hanging on the second horizontal steel 30 side. In the present embodiment, H-shaped steel is used as the support pile 10. Therefore, the simple scaffold 80 can be easily and surely secured by locking the web portion locking piece 84 with the locking piece 84a and the locking piece 84b sandwiching the web portion connecting the flanges of the H-shaped steel. Can be suspended on the second horizontal steel 30 side of the uppermost stage included in the outer surface.

実際の作業では、簡易足場80のウェブ部係止片84が突設されていない側において、短鋼材82bと接続する部位よりも更に延出する長鋼材81a,81bの部位を作業者が支える。かかる状態で、簡易足場80をクレーン等で吊り上げ、ウェブ部係止片84が突設されている面を下に向けたまま、同クレーン等の操作で、ウェブ部係止片84を備える簡易足場80の一端を係止の対象となる支持杭10の先端に誘導する。なお、簡易足場80の長鋼材81a,81bが延出する側については、上記ウェブ部係止片84の係止作業後、同外側面に含まれる最上段の第二水平鋼材30と対向する第二水平鋼材30に対して、任意の公知手法で仮固定すればよい。   In actual work, the operator supports the portions of the long steel members 81a and 81b that extend further than the portion connected to the short steel member 82b on the side where the web portion locking piece 84 of the simple scaffold 80 is not projected. In this state, the simple scaffold 80 is lifted by a crane or the like, and the simple scaffolding provided with the web portion locking piece 84 is operated by operating the crane or the like with the surface on which the web portion locking piece 84 is projected facing downward. One end of 80 is guided to the tip of the support pile 10 to be locked. In addition, about the side where the long steel materials 81a and 81b of the simple scaffold 80 are extended, after the locking operation of the web portion locking pieces 84, the first facing the second horizontal steel material 30 on the uppermost stage included in the outer side surface. What is necessary is just to temporarily fix with respect to the two horizontal steel materials 30 by arbitrary well-known methods.

ここで、長鋼材81a,81bが延出する側を仮固定する第二水平鋼材30と他の第二水平鋼材30であって解体の順序が後となる第二水平鋼材30とを接続する主桁等が、除去されずにまだ設置されている場合がある。かかる場合であっても、長鋼材81a,81bが延出する側では、同長鋼材81a,81b間に隙間が生じていため、同隙間に同主桁の端部を導き、長鋼材81a,81bで同主桁を挟むようにすれば、同簡易足場80を最上段の第二水平鋼材30間に架渡すことができる。   Here, the main part which connects the 2nd horizontal steel material 30 which is the 2nd horizontal steel material 30 which temporarily fixes the side where long steel materials 81a and 81b extend, and other 2nd horizontal steel materials 30, and the order of disassembly is the latter. In some cases, girders, etc. are still installed without being removed. Even in such a case, on the side where the long steel members 81a and 81b extend, a gap is generated between the long steel members 81a and 81b. Therefore, the end portions of the main girder are guided into the gap, and the long steel members 81a and 81b are provided. If the main girder is sandwiched between them, the simple scaffold 80 can be bridged between the second horizontal steel members 30 at the uppermost stage.

簡易足場80は、最上段の第二水平鋼材30間を連絡する足場としての役割を果たすだけではない。上述したように、簡易足場80を架渡す段階では、同外側面に含まれる最上段の第二水平鋼材30及び当該第二水平鋼材30が各先端部位を接続する各支持杭10は、作業用構台100の他の部分と切断されている。従って、簡易足場80の両端を最上段の各第二水平鋼材30に係止することで、若干不安定さを残す同外側面に含まれる最上段の第二水平鋼材30及び当該第二水平鋼材30が各先端部位を接続する各支持杭10が安定する。その結果、同外側面に含まれる最上段の第二水平鋼材30上での作業も安全なものとなる。   The simple scaffold 80 does not only serve as a scaffold for communicating between the uppermost second horizontal steel members 30. As described above, in the stage of transferring the simple scaffold 80, the uppermost second horizontal steel material 30 included in the outer side surface and each support pile 10 to which the second horizontal steel material 30 connects the respective tip end portions are used for work. The other part of the gantry 100 is cut off. Therefore, the both ends of the simple scaffold 80 are locked to the second horizontal steel members 30 on the uppermost stage, so that the uppermost second horizontal steel member 30 and the second horizontal steel members included in the outer side surface that remain slightly unstable. Each support pile 10 which 30 connects each front-end | tip part is stabilized. As a result, the work on the uppermost second horizontal steel member 30 included in the outer side surface is also safe.

図9は、作業用構台100の外側面に含まれる最上段の第二水平鋼材30を切断する際の説明図である。
同図は、上記図6と同様に、覆工板70の長手方向を向く作業用構台100の外側面を正面から示しており、同作業用構台100の最上段には、簡易足場80が架け止められている。作業者は、簡易足場80上を移動し、上記外側面に含まれる最上段の第二水平鋼材30上に到達する。そして、上記ウェブ部係止片84を係止した支持杭10の両側あるいは片側の第二水平鋼材30の部位であって、各支持杭10を接続する部位を切断する。かかる部位を切断したら、次に、簡易足場80を架渡す位置を他の支持杭10上に変更し、同様に最上段の第二水平鋼材30の部位であって、各支持杭10を接続する部位を切断する。このようにして、最終的には、最上段の第二水平鋼材30の部位であって各支持杭10を接続する部位の全てを切断する。
FIG. 9 is an explanatory diagram when cutting the uppermost second horizontal steel member 30 included in the outer surface of the work gantry 100.
As in FIG. 6, the figure shows the outer side of the work gantry 100 facing the longitudinal direction of the lining plate 70 from the front, and a simple scaffold 80 is installed on the uppermost stage of the work gantry 100. Stopped. The worker moves on the simple scaffold 80 and reaches the uppermost second horizontal steel member 30 included in the outer surface. And the site | part which is the site | part of the 2nd horizontal steel material 30 of the both sides of the support pile 10 which latched the said web part latching piece 84, or one side, and connects each support pile 10 is cut | disconnected. If this part is cut | disconnected, next, the position which crosses the simple scaffold 80 will be changed on the other support pile 10, and it is the part of the 2nd horizontal steel material 30 of the uppermost stage similarly, and each support pile 10 is connected. Cut the site. In this way, finally, all of the parts of the uppermost second horizontal steel material 30 that connect the support piles 10 are cut.

また、同図(2)に示すように、最上段の第二水平鋼材30の各部位を切断していく際に、各支持杭10の先端部位にワイヤ90の一端を取り付ける。支持杭10の先端部位に取付けられなかった同ワイヤ90の他端は、同支持杭10を除去する際にクレーンのフック等で保持される。つまり、その両側あるいは片側の第二水平鋼材30の各部位が切断され、他の支持杭10とは一切接続せず独立して地上に立設する状態となった支持杭10を一本ずつ除去する。   Also, as shown in FIG. 2B, one end of the wire 90 is attached to the tip portion of each support pile 10 when each portion of the uppermost second horizontal steel material 30 is cut. The other end of the wire 90 that is not attached to the tip portion of the support pile 10 is held by a crane hook or the like when the support pile 10 is removed. That is, each part of the second horizontal steel material 30 on both sides or one side thereof is cut, and the support piles 10 which are in a state of standing on the ground independently without being connected to the other support piles 10 are removed one by one. To do.

図10は、各支持杭10を除去する際の説明図である。
同図に示すように、一の支持杭10の先端部位に取付けた上記ワイヤ90の他端を図示しないクレーンのフック等で吊下げ支持した状態で、地上において同支持杭10の根元近傍を切断する。そして、同根元近傍が切断された支持杭10を上記ワイヤ90を介してクレーン等で吊り下げた状態で傾倒させ、所定の資材置き場に移動させる。このように、最上段の第二水平鋼材30の各部位の切断及び支持杭10の除去作業を繰り返すことで、覆工板70の長手方向に並び基準空間B1〜B3の形成に用いられる支持杭10であって、外側面に含まれる各支持杭10の除去が完了する。そして、作業用構台100の端から順に、全ての基準空間Bに対して上述した各処理を繰り返し行えば、作業用構台100の全てを解体することができる。
FIG. 10 is an explanatory diagram when each support pile 10 is removed.
As shown in the figure, in the state where the other end of the wire 90 attached to the tip portion of one support pile 10 is suspended and supported by a hook or the like of a crane (not shown), the vicinity of the root of the support pile 10 is cut on the ground. To do. And the support pile 10 from which the root vicinity was cut | disconnected is tilted in the state suspended with the crane etc. via the said wire 90, and it moves to a predetermined | prescribed material storage. Thus, the support pile used for forming the reference spaces B1 to B3 aligned in the longitudinal direction of the lining board 70 by repeating the cutting of each part of the second horizontal steel material 30 at the uppermost stage and the removal work of the support pile 10. 10 and the removal of each support pile 10 included in the outer surface is completed. Then, if each process described above is repeated for all the reference spaces B in order from the end of the working gantry 100, the entire working gantry 100 can be disassembled.

図11は、簡易足場の他の例を斜視図により示している。
簡易足場110は、長鋼材111a,111bと、短鋼材112a,112bとによって略矩形に組まれる点、及び長鋼材111a,111bと短鋼材112a,112bとによって囲まれた範囲をメッシュ部材113が覆う点は、上記簡易足場80と同様である。しかし、簡易足場110は、短鋼材112aの略中央及び、短鋼材112aよりも所定の距離、簡易足場110の中央に接近した位置で長鋼材111aと長鋼材111bとを接続する短鋼材112cの略中央から、夫々下向きにウェブ部係止片114,115が突設されている。更に、短鋼材112aが長鋼材111a,111bと接続する各部位、及び、短鋼材112cが長鋼材111a,111bと接続する各部位には、昇降型ゴンドラを吊下げるためのゴンドラ吊下具116,117が夫々取付けられている。
FIG. 11 is a perspective view showing another example of a simple scaffold.
In the simple scaffolding 110, the mesh member 113 covers a point where the long steel members 111a and 111b and the short steel members 112a and 112b are assembled in a substantially rectangular shape and a range surrounded by the long steel members 111a and 111b and the short steel members 112a and 112b. The point is the same as that of the simple scaffold 80 described above. However, the simple scaffold 110 is an approximate center of the short steel material 112a and the short steel material 112c that connects the long steel material 111a and the long steel material 111b at a position closer to the center of the simple scaffold 110 at a predetermined distance than the short steel material 112a. From the center, web portion locking pieces 114 and 115 project downward from the center, respectively. Further, in each part where the short steel material 112a is connected to the long steel material 111a, 111b, and in each part where the short steel material 112c is connected to the long steel material 111a, 111b, gondola hanger 116 for hanging the elevating gondola, 117 is attached respectively.

上記構成によって、簡易足場110は、最上段の第二水平鋼材30間に架渡された際に、足場としてだけではなく、昇降型ゴンドラを吊り下げる役割も果たす。すなわち、作業用構台100の外側面に含まれる最上段の第二水平鋼材30が接続する何れかの支持杭10の先端に、ウェブ部係止片114或いは、ウェブ部係止片115を係止する。ウェブ部係止部114を支持杭10に係止させる際には、予め、短鋼材112cが長鋼材111a,111bと接続する部位に取付けられた二つのゴンドラ吊下具117に、昇降型ゴンドラを吊下げておく。上記ゴンドラ61を用いる場合(ゴンドラ62を用いる場合も同じ)は、二本のワイヤ61b(62b)の先端を各ゴンドラ吊下具117に夫々懸止めることにより、上記ゴンドラ61(62)をゴンドラ吊下具117に吊下げる。その結果、簡易足場110を最上段の第二水平鋼材30間に架渡した際に、作業用構台100の外側面を形成する支持杭10の内側において、昇降型ゴンドラを昇降させることができる。   With the above-described configuration, the simple scaffold 110 not only serves as a scaffold when suspended between the uppermost second horizontal steel members 30, but also serves to suspend the elevating gondola. That is, the web portion locking piece 114 or the web portion locking piece 115 is locked to the tip of any of the support piles 10 to which the uppermost second horizontal steel material 30 included in the outer surface of the work gantry 100 is connected. To do. When the web portion locking portion 114 is locked to the support pile 10, the lift type gondola is previously attached to the two gondola suspension tools 117 attached to the portions where the short steel material 112 c is connected to the long steel materials 111 a and 111 b. Hang it. When the gondola 61 is used (the same applies when the gondola 62 is used), the ends of the two wires 61b (62b) are suspended from the gondola suspensions 117, respectively, so that the gondola 61 (62) is suspended from the gondola. Suspend from the lower tool 117. As a result, when the simple scaffold 110 is bridged between the uppermost second horizontal steel members 30, the elevating gondola can be raised and lowered inside the support pile 10 that forms the outer surface of the work gantry 100.

一方、ウェブ部係止部115を支持杭10に係止させる際には、予め、二つのゴンドラ吊下具116に、昇降用ゴンドラを吊下げておく。ここでも、上記ゴンドラ61(62)を用いる場合は、二本のワイヤ61b(62b)の先端を各ゴンドラ吊下具116に夫々懸止める。すると、簡易足場110を最上段の第二水平鋼材30間に架渡した際に、ゴンドラ吊下具116は作業用構台100の外側面よりも更に外側に位置することになり、昇降型ゴンドラを同外側面を形成する支持杭10の更に外側において昇降させることができる。すなわち、最上段の第二水平鋼材30間に架渡す足場として簡易足場110を用いれば、作業用構台100の外側面を形成する支持杭10の内側または外側で昇降型ゴンドラを昇降させることができる。その結果、支持杭10の側面に取付いたままの鋼材の除去など、適宜、種々の作業を行うことができる。   On the other hand, when the web portion locking portion 115 is locked to the support pile 10, the lifting gondola is previously suspended from the two gondola suspension tools 116. Again, when the gondola 61 (62) is used, the ends of the two wires 61b (62b) are suspended from the gondola suspensions 116, respectively. Then, when the simple scaffolding 110 is bridged between the second horizontal steel members 30 at the uppermost stage, the gondola suspension 116 is positioned further outside than the outer surface of the work gantry 100, and the lifting type gondola is installed. The support pile 10 that forms the outer side surface can be moved up and down on the outer side. That is, if the simple scaffold 110 is used as a scaffold spanned between the second horizontal steel members 30 at the uppermost stage, the elevating gondola can be raised and lowered inside or outside the support pile 10 that forms the outer surface of the work gantry 100. . As a result, various operations such as removal of the steel material attached to the side surface of the support pile 10 can be appropriately performed.

このように、昇降動作が可能なゴンドラ61,62を略水平移動可能な状態で支持するゴンドラユニット50を作業の対象となる基準空間Bの最上段に設置し、同基準空間Bの形成に用いられている、最上段の第二水平鋼材30以外の所定の鋼材を切断、除去する。当該ゴンドラ61,62を用いた切断、除去作業を、作業用構台100の端において覆工板70の長手方向に連なる全基準空間Bに対して行った後、最上段の第二水平鋼材30間に、簡易足場80を架け渡す。そして、作業用構台100の外側面に含まれる最上段の第二水平鋼材30の各部位を切断し各支持杭10を独立した状態とした上で、各支持杭10を除去する。以上の工程を繰り返すことで、作業用構造台100を、少ない労力で効率よくかつ安全に解体することができる。   In this way, the gondola unit 50 that supports the gondolas 61 and 62 capable of moving up and down in a state of being substantially horizontally movable is installed at the uppermost stage of the reference space B to be worked, and used for forming the reference space B. The predetermined steel material other than the uppermost second horizontal steel material 30 is cut and removed. After the cutting and removing operations using the gondola 61 and 62 are performed on all the reference spaces B continuous in the longitudinal direction of the lining plate 70 at the end of the working gantry 100, the second horizontal steel members 30 between the uppermost stages A simple scaffolding 80 is bridged over. Then, after cutting each part of the second horizontal steel material 30 on the uppermost stage included in the outer surface of the working gantry 100 to make each support pile 10 independent, each support pile 10 is removed. By repeating the above steps, the work structure 100 can be disassembled efficiently and safely with little effort.

作業用構台の概略斜視図である。It is a schematic perspective view of a working gantry. ゴンドラユニットを示した斜視図である。It is the perspective view which showed the gondola unit. 作業用構台を上方から示した図である。It is the figure which showed the work gantry from the upper part. 第一水平鋼材及び第一斜鋼材を除去する際の説明図である。It is explanatory drawing at the time of removing a 1st horizontal steel material and a 1st diagonal steel material. 作業用構台を上方から示した図である。It is the figure which showed the work gantry from the upper part. 第二水平鋼材及び第二斜鋼材を切断する際の説明図である。It is explanatory drawing at the time of cut | disconnecting a 2nd horizontal steel material and a 2nd diagonal steel material. 簡易足場を示した斜視図である。It is the perspective view which showed the simple scaffold. 作業用構台を上方から示した図である。It is the figure which showed the work gantry from the upper part. 作業用構台の外側面に含まれる最上段の第二水平鋼材を切断する際の説明図である。It is explanatory drawing at the time of cut | disconnecting the uppermost 2nd horizontal steel material contained in the outer surface of a working gantry. 支持杭を除去する際の説明図である。It is explanatory drawing at the time of removing a support pile. 簡易足場の他の例を示した斜視図である。It is the perspective view which showed the other example of the simple scaffold. 従来の解体作業についての説明図である。It is explanatory drawing about the conventional dismantling work.

符号の説明Explanation of symbols

10…支持杭、20…第一水平鋼材、30…第二水平鋼材、41,41a…第一斜鋼材、42…第二斜鋼材、50…ゴンドラユニット、51…ゴンドラ支持枠体 52…下方枠、53…上方枠、54a,54b…端枠、61,62…ゴンドラ、70…覆工板、80,110…簡易足場、81a,81b,111a,111b…長鋼材、82a,82b,112a,112b,112c…短鋼材、84,114,115…ウェブ部係止片、100…作業用構台、116,117…ゴンドラ吊下具、A,A1,A2,A3…基準格子枠、B,B1,B2,B3…基準空間 DESCRIPTION OF SYMBOLS 10 ... Support pile, 20 ... 1st horizontal steel material, 30 ... 2nd horizontal steel material, 41, 41a ... 1st diagonal steel material, 42 ... 2nd diagonal steel material, 50 ... Gondola unit, 51 ... Gondola support frame body 52 ... Lower frame 53, upper frame, 54a, 54b ... end frame, 61, 62 ... gondola, 70 ... lining plate, 80, 110 ... simple scaffold, 81a, 81b, 111a, 111b ... long steel, 82a, 82b, 112a, 112b , 112c ... short steel material, 84, 114, 115 ... web portion locking piece, 100 ... work gantry, 116, 117 ... gondola suspension, A, A1, A2, A3 ... reference lattice frame, B, B1, B2 , B3 ... Reference space

Claims (6)

略矩形板状の覆工板を地面よりも所定の高さ位置に平面状に複数枚敷設するため同覆工板の長手方向及び幅方向に夫々所定の間隔を空けて立設する複数の支持杭と、各支持杭を同幅方向に接続する複数の第一の鋼材と、各支持杭を同長手方向に接続する複数の第二の鋼材とによって組まれた作業用構台を解体する作業用構台解体方法であって、
昇降型ゴンドラと同昇降型ゴンドラを吊り下げ支持するゴンドラ支持体とからなる解体作業用ゴンドラユニットを上記作業用構台の最上段の所定位置に設置するゴンドラユニット設置工程と、
上記支持杭と第一の鋼材と第二の鋼材とによって形成される単位空間であって第一の鋼材又は第二の鋼材を含む一面が上記作業用構台の外側面を兼ねる単位空間が複数段積み重なった空間の内部又は外部において、上記昇降型ゴンドラを下降又は上昇させ、同昇降型ゴンドラが各第一の鋼材または第二の鋼材の高さ位置に移動した際に、上記作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材を一方とする上記最上段における第一の鋼材の対又は第二の鋼材の対のいずれかを除き、少なくとも、各鋼材の部位であって同空間の形成にのみ用いられている各鋼材の部位を切断又は除去する第一解体工程と、
上記切断も除去も行われなかった第一の鋼材の対又は第二の鋼材の対が夫々上記支持杭の先端部位と交差する部位に、簡易足場の両先端部位を係止させることにより、同簡易足場を上記最上段の第一の鋼材間又は第二の鋼材間に架渡す足場架渡し工程と、
上記最上段において簡易足場が架渡された第一の鋼材または第二の鋼材のうち上記作業用構台の外側面に含まれる鋼材の中途部位であって、上記支持杭間を接続する部位を切断する第二解体工程と、
上記第一解体工程及び第二解体工程により他の支持杭と接続しない状態となった支持杭を除去する支持杭除去工程とを備えることを特徴とする作業用構台解体方法。
A plurality of supports that are erected at predetermined intervals in the longitudinal direction and the width direction of the covering plate in order to lay a plurality of substantially rectangular plate-like covering plates in a planar shape at a predetermined height position from the ground. For dismantling a work gantry composed of piles, a plurality of first steel members that connect each support pile in the same width direction, and a plurality of second steel materials that connect each support pile in the same longitudinal direction A gantry dismantling method,
A gondola unit installation step of installing a gondola unit for dismantling work composed of an elevating gondola and a gondola support for hanging and supporting the elevating gondola at a predetermined position on the uppermost stage of the working gantry;
A unit space formed by the support pile, the first steel material, and the second steel material, wherein one surface including the first steel material or the second steel material serves as an outer surface of the work gantry, and a plurality of unit spaces are provided. The elevating gondola is lowered or raised inside or outside the stacked space, and when the elevating gondola moves to the height position of each first steel material or second steel material, Except for either the first steel material pair or the second steel material pair in the uppermost stage with the first steel material or the second steel material included in the side as one side, at least the part of each steel material is the same. A first dismantling step of cutting or removing each steel material part used only for forming the space;
By locking both the tip portions of the simple scaffold to the portions where the first steel pair or the second steel material pair that has not been cut or removed intersects the tip portion of the support pile, respectively. A scaffold transfer step of transferring a simple scaffold between the first steel members or the second steel members of the uppermost stage;
Of the first steel material or the second steel material over which the simple scaffold is bridged in the uppermost stage, a part of the steel material included in the outer surface of the work gantry, and a part connecting the support piles is cut. A second dismantling process to
A working gantry disassembling method comprising: a support pile removing step of removing a support pile that has not been connected to another support pile by the first disassembly step and the second disassembly step.
上記第一解体工程は、上記昇降型ゴンドラをゴンドラ支持体によって吊られた状態で略水平方向に移動させ昇降動作を行う位置を変化させることを特徴とする請求項1に記載の作業用構台解体方法。 2. The work gantry disassembly according to claim 1, wherein in the first disassembly step, the position of the lifting / lowering operation is changed by moving the lifting / lowering gondola in a substantially horizontal direction while being hung by a gondola support. Method. 上記第一解体工程は、複数の昇降型ゴンドラを下降又は上昇させ所定の鋼材を複数箇所において切断し、同所定の鋼材を他の鋼材又は支持杭と接続しない状態にし除去することを特徴とする請求項1または請求項2のいずれかに記載の作業用構台解体方法。 The first disassembling step is characterized in that a plurality of elevating gondola is lowered or raised to cut a predetermined steel material at a plurality of locations, and the predetermined steel material is removed from a state where it is not connected to another steel material or a support pile. The working gantry dismantling method according to claim 1 or 2. 上記足場架渡し工程は、少なくとも一方の先端部位に支持杭先端のウェブ部に係止可能なウェブ部係止片を形成した簡易足場を用い、同ウェブ部係止片を、上記切断も除去も行われなかった最上段の第一の鋼材の対又は第二の鋼材の対における作業用構台の外側面に含まれる第一の鋼材又は第二の鋼材と交差する支持杭のウェブ部に係止することを特徴とする請求項1〜請求項3のいずれかに記載の作業用構台解体方法。 The scaffold spanning step uses a simple scaffold in which a web portion locking piece that can be locked to the web portion of the support pile tip is formed at at least one tip portion, and the web portion locking piece is cut and removed. Locked to the web portion of the support pile intersecting the first steel material or the second steel material included in the outer surface of the working gantry in the first steel material pair or the second steel material pair that was not performed The work gantry disassembly method according to any one of claims 1 to 3, wherein: 上記足場架渡し工程は、少なくとも、一方の先端部位から上記簡易足場の中央側に所定距離接近した位置に支持杭先端のウェブ部に係止可能なウェブ部係止片を形成し、かつ、長手側の両縁部であって上記一方の先端近傍を含む複数箇所に上記昇降型ゴンドラを吊下げるためのゴンドラ吊下具を形成した簡易足場を用いることを特徴とする請求項1〜請求項4のいずれかに記載の作業用構台解体方法。 The scaffold spanning step forms at least a web portion locking piece that can be locked to the web portion at the tip of the support pile at a position close to the center side of the simple scaffold from one tip portion, and is long 5. A simple scaffold in which gondola suspensions for suspending the elevating gondola are formed at a plurality of locations on both sides including the vicinity of the one end. The working gantry dismantling method according to any one of the above. 所定間隔を空けて立設する支持杭を接続するとともに互いに所定の距離をもって対向する鋼材間に架渡される簡易足場であって、
少なくとも、一方の先端部位から同簡易足場の中央側に所定距離接近した位置に上記支持杭の先端部位に係止可能な先端部位係止片を形成し、かつ、長手側の両縁部であって上記一方の先端近傍を含む複数箇所に昇降型ゴンドラを吊下げるためのゴンドラ吊下具を形成した簡易足場。
It is a simple scaffold that is connected between steel members facing each other with a predetermined distance while connecting support piles standing up with a predetermined interval,
At least a tip portion locking piece that can be locked to the tip portion of the support pile is formed at a position approaching a predetermined distance from the one tip portion to the center side of the simplified scaffold, and both edge portions on the long side are formed. A simple scaffolding in which gondola suspensions for suspending the elevating gondola are formed at a plurality of locations including the vicinity of the one end.
JP2004026398A 2004-02-03 2004-02-03 Working frame dismantling method and simple scaffold Expired - Lifetime JP4109637B2 (en)

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