JP3179138U - Scaffolding support for leg head construction - Google Patents

Scaffolding support for leg head construction Download PDF

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JP3179138U
JP3179138U JP2012004770U JP2012004770U JP3179138U JP 3179138 U JP3179138 U JP 3179138U JP 2012004770 U JP2012004770 U JP 2012004770U JP 2012004770 U JP2012004770 U JP 2012004770U JP 3179138 U JP3179138 U JP 3179138U
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suspension
scaffold
leg head
support
pier body
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太郎 田中
秀明 大嶋
吉生 備前
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川田建設株式会社
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Abstract

【課題】ブラケット足場を取り付けず大きな鉛直力を作用させることができ下部工との連携がなくとも信頼性が高く足場も一面にて施工可能な脚頭部施工用足場支保工を提供する。
【解決手段】脚頭部施工用足場支保工の吊主構は支柱２と上梁３と吊梁４を有する。吊主構は地組して一括で吊上げ橋脚本体８の上端面に配設するアンカーボルト１１に固定する。上梁３は橋軸直角方向に、吊梁４は橋軸方向に配設する。上梁３に上梁補強材１２を接続する。吊梁４から垂下する吊部材１３で吊下作業台１４を支持し、対向する吊下作業台１４，１４間に載置作業台１５を架設する。吊下作業台１４及び載置作業台１５上に脚頭部外周足場１６を形成する。
【選択図】図９Provided is a scaffolding support for a leg head construction which can apply a large vertical force without attaching a bracket scaffold and can be constructed with high reliability without requiring cooperation with a substructure, and the scaffold can be constructed on one side.
A suspension main structure of a scaffold support for a leg head construction includes a support column, an upper beam, and a suspension beam. The suspension main structure is grounded and fixed together to anchor bolts 11 disposed on the upper end surface of the lifting pier body 8. The upper beam 3 is disposed in the direction perpendicular to the bridge axis, and the suspension beam 4 is disposed in the bridge axis direction. The upper beam reinforcing member 12 is connected to the upper beam 3. A suspension work table 14 is supported by a suspension member 13 suspended from the suspension beam 4, and a mounting work table 15 is installed between the suspension work tables 14 and 14 facing each other. A leg head outer periphery scaffold 16 is formed on the suspension work table 14 and the placement work table 15.
[Selection] Figure 9

Description

この考案は、橋脚本体上の脚頭部を構築するための鉄筋及び型枠組立作業用、更にはコンクリート打設作業用に用いる脚頭部施工用足場支保工に関する。   The present invention relates to a scaffolding support for construction of a leg head used for rebar and formwork assembling work for constructing a leg head on a pier body, and further for concrete placing work.

橋梁の建設工事は、一般に、下部工である橋脚の施工と、上部工である橋体の施工が別々に区分されている場合が多い。この場合橋脚の最上部である脚頭部の施工は上部工の施工区分となる。   In general, the construction of bridges is often divided into the construction of piers, which are substructures, and the construction of bridge bodies, which are superstructures. In this case, the construction of the pier head, which is the uppermost part of the bridge pier, is the construction division of the superstructure.

従って、下部工が竣工すると、下部工施工時に形成した足場は一旦撤去され、橋脚本体のみが引き渡される。そこで改めて足場組立から着手して昇降用の足場を確保しなければならない。次に出来形を確認するための作業床を確保し、脚頭部施工のための着手前測量を行い、次いで脚頭部構築用の鉄筋組立、型枠組立作業を行い、コンクリート打設作業を行っている。   Therefore, when the substructure is completed, the scaffold formed at the time of substructure construction is once removed and only the pier body is delivered. Therefore, it is necessary to secure the scaffold for raising and lowering by starting from the scaffold assembly. Next, secure a work floor to check the finished shape, conduct pre-measurement for the leg head construction, then perform rebar assembly and formwork assembly work for leg head construction, and concrete placement work Is going.

この作業床の構築で橋脚の高さＨがＨ≦１０ｍと比較的低い場合には、橋脚本体の全周・四面に枠組足場支保工を組み立てて、その頂部に作業床を形成しているが、Ｈ＞１０ｍと高橋脚になる場合には、昇降用の足場を利用して橋脚本体の上部壁面にブラケットを取り付け、このブラケット上に作業床を形成していた。   If the height H of the pier is relatively low (H ≤ 10 m) due to the construction of this work floor, a frame scaffolding support is assembled on the entire circumference and four sides of the pier body, and the work floor is formed on the top. When H> 10 m and a high pier, a bracket was attached to the upper wall surface of the pier body using a lifting platform, and a work floor was formed on the bracket.

脚頭部構築用にブラケット足場を用いる従来技術としては、例えば特許文献１に記載されるような脚頭部施工用足場支保工があった。
特開２００８−３８４６３号公報 As a prior art using a bracket scaffold for leg head construction, there is a scaffold support for leg head construction as described in Patent Document 1, for example.
JP 2008-38463 A

このようなブラケット足場を取り付けるためには、図１１に示すように脚頭部７のない橋脚本体８の廻りに少なくとも２面の足場１０９が必要であった。この足場１０９は図示しない地盤より立ち上げる枠組足場支保工であって、昇降足場も兼用していた。この枠組足場支保工の頂部はブラケット１１０を取り付けるための作業床を形成していた。   In order to attach such a bracket scaffold, as shown in FIG. 11, at least two scaffolds 109 are required around the pier body 8 without the leg head 7. This scaffold 109 is a frame scaffold support that is launched from the ground (not shown), and also serves as a lifting scaffold. The top part of this frame scaffold support work formed a work floor for attaching the bracket 110.

例えば脚頭部７の橋軸方向にブラケット１１０を取り付けた場合、先ず橋軸直角方向に図示しない横梁をブラケット１１０に固定し、次にこの横梁端部に橋軸方向の縦梁を固定していた。更に橋脚外周部に設置したこれらの梁材上に鉄筋及び型枠組立、コンクリート打設用の作業やぐら１１１を組み立てていた。   For example, when the bracket 110 is attached in the direction of the bridge axis of the leg head 7, a horizontal beam (not shown) is first fixed to the bracket 110 in the direction perpendicular to the bridge axis, and then a vertical beam in the bridge axis direction is fixed to the end of the horizontal beam. It was. Furthermore, rebar and formwork assembly, concrete placement work and wobble 111 were assembled on these beam members installed on the outer periphery of the pier.

ブラケット１１０は脚頭部７を構築するために用いる作業やぐら１１１を支持するもので、これらの足場材やブラケット１１０を吊り込むためタワークレーン１１２が橋脚本体８の側部に併設されていた。   The bracket 110 supports the work used for constructing the leg head 7 and the tower 111, and a tower crane 112 is attached to the side of the pier body 8 to suspend these scaffolding materials and the bracket 110.

ブラケット１１０を橋脚本体８に強固に固定するためには、下部工施工時に、橋脚本体８にＰＣ鋼材挿通用の貫通孔１１３を形成し、その下部にはアンカーボルト１１４を埋設することが望ましかった。   In order to firmly fix the bracket 110 to the pier body 8, it is desirable to form a through hole 113 for inserting a PC steel material in the pier body 8 and embed an anchor bolt 114 in the lower part at the time of substructure construction. It was.

ブラケット１１０の上部をＰＣ鋼材１１５で緊張し、下部をアンカーボルト１１４にて固定する構造は、上部は摩擦接合、下部はアンカー材によるせん断抵抗にて固定するもので、貫通する１本もののＰＣ鋼材１１５の場合には信頼性が高く、大きな鉛直力を支持することが可能であった。   The structure in which the upper part of the bracket 110 is tensioned by the PC steel material 115 and the lower part is fixed by the anchor bolt 114, the upper part is fixed by friction welding, and the lower part is fixed by the shearing resistance by the anchor material. In the case of 115, the reliability was high and it was possible to support a large vertical force.

ところで上部工の施工と下部工の施工において連携できる状態にある時には、下部工施工時に上述の貫通孔１１３の形成及びアンカーボルト１１４の埋設が可能であるが、連係できない状態の場合には、上部工の後施工で対処せねばならず、この場合には例えばダイアモンドカッタによるコア抜き作業を行ったり、貫通孔ができない場合にはＰＣ鋼材を樹脂で固定せねばならなかった。   By the way, when the construction of the superstructure and the construction of the substructure can be linked, it is possible to form the above-mentioned through hole 113 and embed the anchor bolt 114 at the time of the construction of the substructure. In this case, for example, a core cutting operation using a diamond cutter or a PC steel material had to be fixed with a resin when a through hole was not possible.

しかし、後施工による樹脂固定は、信頼性の問題があり、引抜実験等の確認作業が必要となる上、大きな鉛直力を作用させることはできなかった。   However, the resin fixing by the post-installation has a problem of reliability, and confirmation work such as a drawing experiment is required, and a large vertical force cannot be applied.

又、下部工との連携が可能で貫通孔の形成及びアンカーボルトの埋設が可能であっても、上部工施工前の事前作業がかなり多くなる問題点があった。   In addition, even if it is possible to cooperate with the substructure, and through holes can be formed and anchor bolts can be embedded, there is a problem that the pre-work before the superstructure construction is considerably increased.

又、ブラケットは少なくとも橋脚本体の２面に必要であるため、この取付用足場も２面形成しなければならず、しかも解体時まで２面が必要であった。この足場の組立・解体作業には多大な労力と工期を要し、長期間の足場設置で工費も上昇する欠点があった。   In addition, since the brackets are required on at least two sides of the pier body, two mounting scaffolds must be formed, and two sides are required until disassembly. The assembly and disassembly work of this scaffold required a great amount of labor and work period, and there was a drawback that the construction cost increased due to the installation of the scaffold for a long time.

また、高橋脚の場合、地盤より５０ｍ以上の高所作業となることもあり、足場組立解体作業に加え、重量物であるブラケットの取り付けや、作業床の形成は安全面からも慎重を要する困難な作業であった。   In addition, in the case of a high pier, it may be a work at a height of 50m or more from the ground, and in addition to the work of assembling and dismantling the scaffolding, it is difficult to attach a heavy load bracket and form a work floor from the safety aspect. It was a difficult task.

この考案は、従来の脚頭部施工用足場支保工が有する上記の問題点を解消すべくなされたものであり、ブラケット足場を取り付けることなく、大きな鉛直力を作用させることが可能で、下部工との連携がなくとも信頼性が高く、足場も一面にて施工可能な脚頭部施工用足場支保工を提供することを目的としている。   This device has been made to solve the above-mentioned problems of the conventional leg head construction scaffold support work, and it is possible to apply a large vertical force without attaching a bracket scaffold. The purpose is to provide a scaffolding support for the leg head construction, which is highly reliable and can be constructed on one side even without any cooperation.

又、この考案は、高所作業をできるだけ軽減するため、地組み作業が多い脚頭部施工用足場支保工を提供することを目的としている。   Another object of the present invention is to provide a scaffolding support for leg head construction, which requires a lot of groundwork to reduce altitude work as much as possible.

上記課題を解決するため、この考案の脚頭部施工用足場支保工は、橋脚本体上の脚頭部を構築するために地盤より橋脚本体の上端まで形成する橋脚本体足場と、橋脚本体の上端周囲に形成する作業床と、この作業床を支持する作業床支持体と、前記作業床上に形成する脚頭部外周足場を備える脚頭部施工用足場支保工において、前記橋脚本体足場は、橋脚本体の一面に形成する昇降用足場であり、前記作業床支持体は、橋脚本体上端面の４箇所に設置する固定手段と、夫々の固定手段より立設する支柱と、支柱上端に架設して橋脚本体より跳ね出す２列の上梁と、この上梁の端部に架設して上梁より跳ね出す２列の吊梁と、この吊梁より垂下する複数の吊部材を有するものであり、前記作業床は、前記吊部材に支持され橋脚本体の対向する２面に並設する吊下作業台と、これらの吊下作業台間に架設して橋脚本体の他の対向する２面に並設する載置作業台であることを特徴とするものである。   In order to solve the above-mentioned problems, the scaffold support for construction of the pier head of the present invention includes a pier body scaffold formed from the ground to the upper end of the pier body, and an upper end of the pier body to construct the pier head on the pier body. In a scaffold support for a leg head construction comprising a work floor formed around, a work floor support for supporting the work floor, and a leg head outer periphery scaffold formed on the work floor, the pier body scaffold is a pier It is a lifting scaffold formed on one surface of the main body, and the work floor support is constructed by fixing means installed at four positions on the upper end surface of the pier main body, a support column standing from each fixing means, and an upper end of the support column. Two rows of upper beams that jump out from the pier body, two rows of suspension beams that hang on the end of the upper beam and jump out of the upper beam, and a plurality of suspension members that hang down from the suspension beam, The work floor is supported by the suspension member and faces the pier body 2. And suspension work platform to parallel to, and is characterized in that in bridged between these suspended work platform is mounted workbench that arranged in the other opposing two sides of the pier body.

固定手段としては、例えば橋脚本体の上端面に埋設するアンカーボルトが望ましいが、樹脂固定等のアンカーボルトでもよい。支柱は平面矩形の頂点に立設して、連結する上梁及び吊梁とで枠体を形成する。隣接する支柱間にはブレースを張設する。   As the fixing means, for example, an anchor bolt embedded in the upper end surface of the pier body is desirable, but an anchor bolt such as resin fixing may be used. The column is erected at the apex of the plane rectangle, and forms a frame with the upper beam and the suspension beam to be connected. A brace is stretched between adjacent struts.

支柱は上部工で構築する脚頭部躯体内に埋設する部材で、据付時には支柱下端面にライナー材を適宜差込み高さ調整した後、無収縮モルタル等を打設して枠体の水平性を確保する。   The strut is a member embedded in the leg head frame constructed by the superstructure.When installing, a liner material is appropriately inserted into the bottom end surface of the strut, the height is adjusted, and non-shrink mortar is placed to improve the horizontality of the frame. Secure.

上梁を例えば橋軸直角方向に配設すると吊梁は上梁先端部の橋軸方向に配設される。上梁及び吊梁の長さは夫々橋脚の橋軸直角方向長さ又は橋軸方向長さより十分長く、吊梁の全体が橋脚の外方に位置する。吊梁の各先端部近傍から少なくとも２本の吊部材を垂下する。   For example, when the upper beam is disposed in a direction perpendicular to the bridge axis, the suspension beam is disposed in the bridge axis direction at the tip of the upper beam. The lengths of the upper beam and the suspension beam are sufficiently longer than the length of the pier in the direction perpendicular to the bridge axis or the length in the direction of the bridge axis, and the entire suspension beam is located outside the pier. At least two suspension members are suspended from the vicinity of each tip of the suspension beam.

吊下作業台は、少なくとも４本の吊部材で支持され、吊梁を橋軸方向に配設する場合には橋脚の橋軸直角方向に配設される。載置作業台は吊下作業台間に架設する部材で、これら吊下作業台及び載置作業台は脚頭部を構築するための脚頭部外周足場を支持し得る構造とする。   The suspension work table is supported by at least four suspension members, and when the suspension beam is disposed in the bridge axis direction, the suspension work table is disposed in a direction perpendicular to the bridge axis of the pier. The mounting work table is a member constructed between the hanging work tables, and the hanging work table and the mounting work table have a structure capable of supporting a leg head outer periphery scaffold for constructing a leg head.

請求項２記載の脚頭部施工用足場支保工の作業床支持体は、少なくとも前記支柱と前記２列の上梁及び前記２列の吊梁を地盤上で組み立て、一括して前記固定手段に架設固定する外周足場フレームであることを特徴とするものである   A work floor support for a scaffolding support for a leg head construction according to claim 2, wherein at least the support column, the two rows of upper beams and the two rows of suspension beams are assembled on the ground and collectively used as the fixing means. It is an outer periphery scaffolding frame for erection and fixing.

外周足場フレームは地組みする吊主構で、この吊主構に吊上げ用の部材を取り付けて一括で脚頭部に吊り込む。   The outer periphery scaffolding frame is a suspended main structure to be grounded, and a lifting member is attached to the main structure and suspended from the leg heads in a lump.

請求項３記載の脚頭部施工用足場支保工の上梁は、柱材と斜材及び水平材を有する上梁補強材を連結することを特徴とするものである。上梁補強材は上梁と連結してトラス構造となる。   The upper beam of the scaffolding support for leg head construction according to claim 3 is characterized by connecting the upper beam reinforcing material having the column material, the diagonal material and the horizontal material. The upper beam reinforcement is connected to the upper beam to form a truss structure.

この考案の脚頭部施工用足場支保工は、地盤より橋脚本体の上端まで形成する橋脚本体足場を昇降用足場一面とすることができるので、足場の組立・解体作業が軽減し、工費低減も期待できる。   The scaffolding support for the leg head construction of this device can make the pier body scaffolding that forms from the ground to the upper end of the pier body as one side of the lifting scaffold, reducing the assembly and disassembly work of the scaffolding, and reducing the construction cost I can expect.

又この考案の脚頭部施工用足場支保工は、ブラケット足場支保工を採用せず、作業床支持体を構成する支柱、上梁、吊梁及び吊部材は作用する荷重に対応して部材構成を決定するので、下部工との連携がなくとも高い信頼性をもって大きな鉛直力を作用させることが可能となり、又ブラケットの取付・取外し作業もなくなるので、高所作業の低減につながる。   In addition, the scaffold support for the leg head construction of this device does not adopt the bracket scaffold support, and the struts, upper beams, suspension beams and suspension members that constitute the work floor support are configured according to the applied load. Therefore, it is possible to apply a large vertical force with high reliability even without cooperation with the substructure, and there is no need for mounting / removing brackets.

請求項２記載の脚頭部施工用足場支保工は、地組みする外周足場フレームを用いるので、高所作業がより軽減する。   Since the scaffold support for the leg head construction according to claim 2 uses the outer periphery scaffold frame to be ground, the work at a high place is further reduced.

請求項３記載の脚頭部施工用足場支保工の上梁は、上梁補強材を連結するので、より大きな吊上げ荷重に対応可能となる。   Since the upper beam of the scaffolding support for leg head construction according to claim 3 connects the upper beam reinforcing material, it can cope with a larger lifting load.

脚頭部施工用足場支保工の吊主構の正面図である。It is a front view of the suspension main structure of the scaffold support for leg head construction. 脚頭部施工用足場支保工の吊主構の側面図である。It is a side view of the suspension main structure of the scaffold support for leg head construction. 脚頭部に吊り込む吊主構の正面図である。It is a front view of the suspension main structure suspended from the leg head. 脚頭部に吊り込む吊主構の左側面図である。It is a left view of the suspension main structure hung on a leg head. 上梁に補強材を取り付けた吊主構の正面図である。It is a front view of the suspension main structure which attached the reinforcing material to the upper beam. 上梁に補強材を取り付けた吊主構の左側面図である。It is a left view of the suspension main structure which attached the reinforcing material to the upper beam. 吊主構が吊下作業台を支持する正面図である。It is a front view in which the suspension main structure supports the suspension work table. 吊主構が吊下作業台を支持する左側面図である。It is a left view in which the suspension main structure supports the suspension work table. 吊下作業台上に組み立てる脚頭部外周足場の一部を省略した正面図である。It is the front view which abbreviate | omitted some leg head outer periphery scaffolds assembled on a suspension work bench | platform. 図９のＡ方向矢視図である。It is an A direction arrow directional view of FIG. 脚頭部構築用にブラケット足場を用いる従来の脚頭部施工用足場支保工の正面図である。It is a front view of the scaffold support construction for the conventional leg head construction which uses a bracket scaffold for leg head construction.

次にこの考案の実施の形態を添付図面に基づき詳細に説明する。図１は脚頭部施工用足場支保工の吊主構の正面図、図２は同吊主構の側面図である。脚頭部施工用足場支保工の吊主構１は、４本の支柱２と、２列の上梁３と、２列の吊梁４を有する。   Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of a suspension main structure of a scaffolding support for leg head construction, and FIG. 2 is a side view of the suspension main structure. The suspension main structure 1 of the scaffold support for the leg head construction includes four columns 2, two rows of upper beams 3, and two rows of suspension beams 4.

支柱２は図示しない橋脚本体の上端平面内部に位置する矩形頂点に立設し得る配置で、隣接する支柱２，２間にはブレース５を張設する。上梁３は支柱２上端に架設して両端部を均等に跳ね出す。吊梁４は上梁３の端部に連結材６を介して架設し同様に両端部を上梁３より均等に跳ね出す。   The support column 2 can be erected at a rectangular apex located inside the upper end plane of the pier body (not shown), and a brace 5 is stretched between the adjacent support columns 2 and 2. The upper beam 3 is erected on the upper end of the column 2 so that both ends are evenly jumped out. The suspension beam 4 is installed on the end portion of the upper beam 3 via the connecting member 6, and similarly, both end portions jump out of the upper beam 3 equally.

吊主構１は支柱２に連結する上梁３及び吊梁４とで平面梯子形状、立面略鳥居形状の枠体を形成する。この枠体は、橋脚近傍の地盤上で組み立て、一括してクレーンを用いて脚頭部に吊り込む。この吊主構の吊り込み作業を図３及び図４に基づき説明する。図３は脚頭部に吊り込む吊主構の正面図、図４は同吊主構の左側面図である。   The suspension main structure 1 forms a frame having a planar ladder shape and a substantially torii-shaped elevation surface with the upper beam 3 and the suspension beam 4 connected to the column 2. This frame is assembled on the ground in the vicinity of the pier and is collectively suspended on the leg head using a crane. The suspension operation of the suspension main structure will be described with reference to FIGS. FIG. 3 is a front view of a suspension main structure suspended from the leg head, and FIG. 4 is a left side view of the suspension main structure.

脚頭部７を構築するため、図示しない地盤面より橋脚本体８の上端まで橋脚本体足場９を形成する。この橋脚本体足場９は、一面に形成する昇降用足場である。   In order to construct the leg head 7, the pier body scaffold 9 is formed from the ground surface (not shown) to the upper end of the pier body 8. This pier body scaffold 9 is a lifting scaffold formed on one surface.

吊主構１には吊上げ用の枕梁１０を取り付けて一括で吊上げ、橋脚本体８の上端面の所定位置に配設するアンカーボルト１１に支柱２の下端を固定する。この時、吊主構１の上梁３は橋軸直角方向に、吊梁４は橋軸方向に配設する。上梁３及び吊梁４の長さは夫々橋脚本体８及び脚頭部７の橋軸直角方向長さ又は橋軸方向長さより十分長く、吊梁４の全体が橋脚の外方に位置する。   A lifting pillow 10 is attached to the suspension main structure 1 and lifted together, and the lower end of the column 2 is fixed to an anchor bolt 11 disposed at a predetermined position on the upper end surface of the pier body 8. At this time, the upper beam 3 of the suspension main structure 1 is disposed in the direction perpendicular to the bridge axis, and the suspension beam 4 is disposed in the direction of the bridge axis. The lengths of the upper beam 3 and the suspension beam 4 are sufficiently longer than the length perpendicular to the bridge axis of the pier body 8 and the leg head 7 or the length in the bridge axis direction, respectively, and the entire suspension beam 4 is located outside the pier.

吊主構１を橋脚本体８の上端面に固定した後、上梁補強材を取り付ける。この状態を図５及び図６に示す。図５は上梁に補強材を取り付けた吊主構の正面図、図６は同左側面図である。   After the suspension main structure 1 is fixed to the upper end surface of the pier body 8, the upper beam reinforcement is attached. This state is shown in FIGS. FIG. 5 is a front view of a main suspension structure in which a reinforcing material is attached to the upper beam, and FIG. 6 is a left side view of the same.

上梁補強材１２は、柱材１２ａと水平材１２ｂ及び斜材１２ｃを有し、斜材１２ｃの一端部は夫々上梁３上の連結材６に接続する。各柱材１２ａの頂部は横繋ぎ材１２ｄで連結する。   The upper beam reinforcing member 12 includes a column member 12a, a horizontal member 12b, and a diagonal member 12c. One end of the diagonal member 12c is connected to the connecting member 6 on the upper beam 3, respectively. The tops of the column members 12a are connected by a horizontal connecting member 12d.

次に吊主構１を用いて橋脚本体の上端周囲に作業床を形成する手順を図７乃至図１０に基づき説明する。図７は吊主構が吊下作業台を支持する正面図、図８は同左側面図、図９は吊下作業台上に組み立てる脚頭部外周足場の一部を省略した正面図、図１０は図９のＡ方向矢視図である。   Next, a procedure for forming a work floor around the upper end of the pier body using the suspension main structure 1 will be described with reference to FIGS. 7 is a front view in which the suspension main structure supports the suspension workbench, FIG. 8 is a left side view thereof, FIG. 9 is a front view in which a part of the leg head outer periphery scaffold assembled on the suspension workbench is omitted, and FIG. FIG. 10 is a view in the direction of arrow A in FIG. 9.

吊梁４の各先端部近傍から夫々２本の吊部材１３を垂下する。各吊部材１３は吊下作業台１４を支持する鋼棒である。吊下作業台１４は、梁上に作業面を形成する構造体で図示しない地盤上で組み立てた後、クレーンにより所定位置まで吊上げ、垂下する吊部材１３と連結する。吊下作業台１４は橋脚本体８の橋軸直角方向の対向する２面に配設する。   Two suspension members 13 are suspended from the vicinity of each tip of the suspension beam 4. Each suspension member 13 is a steel bar that supports the suspension work table 14. The suspension work table 14 is a structure that forms a work surface on a beam and is assembled on a ground (not shown), and then is suspended to a predetermined position by a crane and connected to a suspension member 13 that is suspended. The suspension work table 14 is disposed on two opposing surfaces of the pier body 8 in the direction perpendicular to the bridge axis.

次に図９に示すように吊下作業台１４，１４間に載置作業台１５を架設する。載置作業台１５も梁上に作業面を形成する構造体で、図示しない地盤上で組み立てた後、クレーンにより吊上げ載置する。なお、載置作業台１５は図７に示す橋脚本体足場９と干渉する部分があるので、この部分の足場は予め解体撤去しておく。   Next, as shown in FIG. 9, a mounting work table 15 is installed between the suspension work tables 14 and 14. The mounting work table 15 is also a structure that forms a work surface on the beam, and is assembled on a ground (not shown) and then lifted and placed by a crane. Since the mounting work table 15 has a part that interferes with the pier body scaffold 9 shown in FIG. 7, the scaffold of this part is disassembled and removed in advance.

吊下作業台１４及び載置作業台１５上に脚頭部外周足場１６を形成する。脚頭部外周足場１６は脚頭部７の形状に合わせる。   A leg head outer periphery scaffold 16 is formed on the suspension work table 14 and the placement work table 15. The leg head outer periphery scaffold 16 is matched to the shape of the leg head 7.

なお、図３、図５、図７および図９において脚頭部コンクリートの断面形状が拡幅を有する逆台形となっているが、拡幅のない長方形断面においても本支保工が使用できるのは勿論である。   3, 5, 7, and 9, the cross-sectional shape of the leg head concrete is an inverted trapezoid having a widened width, but it is a matter of course that this support can be used even in a rectangular cross section without a widened width. is there.

１ 吊主構
２ 支柱
３ 上梁
４ 吊梁
７ 脚頭部
８ 橋脚本体
９ 橋脚本体足場
１１ アンカーボルト
１２ 上梁補強材
１３ 吊部材
１４ 吊下作業台
１５ 載置作業台
１６ 脚頭部外周足場 DESCRIPTION OF SYMBOLS 1 Suspension main structure 2 Support | pillar 3 Upper beam 4 Suspension beam 7 Leg head 8 Abutment main body 9 Abutment main body scaffold 11 Anchor bolt 12 Upper beam reinforcement 13 Suspension member 14 Suspension work table 15 Mounting work table 16 Leg head outer periphery scaffold

Claims (3)

橋脚本体上の脚頭部を構築するために地盤より橋脚本体の上端まで形成する橋脚本体足場と、橋脚本体の上端周囲に形成する作業床と、この作業床を支持する作業床支持体と、前記作業床上に形成する脚頭部外周足場を備える脚頭部施工用足場支保工において、前記橋脚本体足場は、橋脚本体の一面に形成する昇降用足場であり、前記作業床支持体は、橋脚本体上端面の４箇所に設置する固定手段と、夫々の固定手段より立設する支柱と、支柱上端に架設して橋脚本体より跳ね出す２列の上梁と、この上梁の端部に架設して上梁より跳ね出す２列の吊梁と、この吊梁より垂下する複数の吊部材を有するものであり、前記作業床は、前記吊部材に支持され橋脚本体の対向する２面に並設する吊下作業台と、これらの吊下作業台間に架設して橋脚本体の他の対向する２面に並設する載置作業台であることを特徴とする脚頭部施工用足場支保工。 A pier body scaffold formed from the ground to the upper end of the pier body in order to construct a pier head on the pier body, a work floor formed around the upper end of the pier body, and a work floor support for supporting the work floor; In the scaffolding construction for leg head construction comprising the leg head outer periphery scaffold formed on the work floor, the pier body scaffold is a lifting scaffold formed on one surface of the pier body, and the work floor support is a pier Fixing means installed at four locations on the upper end surface of the main body, pillars erected from each fixing means, two rows of upper beams erected from the upper end of the pillar and jumping out from the pier body, and installed at the ends of the upper beams And having a plurality of suspension members suspended from the suspension beams, and the working floor is supported by the suspension members and arranged in parallel on two opposing surfaces of the pier body. Suspension worktables to be installed, and bridge piers built between these suspension worktables Leg head construction scaffolding shoring, characterized in that the mounting workbench that arranged in the other two opposite sides of the body. 前記作業床支持体は、少なくとも前記支柱と前記２列の上梁及び前記２列の吊梁を地盤上で組み立て、一括して前記固定手段に架設固定する外周足場フレームであることを特徴とする請求項１記載の脚頭部施工用足場支保工。 The work floor support is an outer periphery scaffolding frame that assembles at least the support columns, the two rows of upper beams, and the two rows of suspension beams on the ground, and collectively fixes them to the fixing means. The scaffold support for the leg head construction according to claim 1. 前記上梁は、柱材と斜材及び水平材を有する上梁補強材を連結することを特徴とする請求項１、請求項２記載の脚頭部施工用足場支保工。 The said upper beam connects the upper beam reinforcement which has a column material, a diagonal material, and a horizontal material, The scaffold support work for leg head construction of Claim 1 and Claim 2 characterized by the above-mentioned.
JP2012004770U 2012-08-03 2012-08-03 Scaffolding support for leg head construction Expired - Lifetime JP3179138U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103122691A (en) * 2013-02-04 2013-05-29 中天建设集团有限公司 Tower crane standard knot bearing upper air supporting formwork steel platform structure and construction method
CN105350451A (en) * 2015-11-19 2016-02-24 招商局重庆交通科研设计院有限公司 Construction method for suspended overhauling platform not pulling or damaging structure object
CN107178037A (en) * 2017-05-31 2017-09-19 中交二公局第工程有限公司 The outer frame connecting structure of trestle vase-shaped column-type pier pier shaft and its construction technology
JP7456970B2 (en) 2021-04-22 2024-03-27 大成建設株式会社 Scaffolding unit and framework construction method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103122691A (en) * 2013-02-04 2013-05-29 中天建设集团有限公司 Tower crane standard knot bearing upper air supporting formwork steel platform structure and construction method
CN105350451A (en) * 2015-11-19 2016-02-24 招商局重庆交通科研设计院有限公司 Construction method for suspended overhauling platform not pulling or damaging structure object
CN105350451B (en) * 2015-11-19 2017-01-18 招商局重庆交通科研设计院有限公司 Construction method for suspended overhauling platform not pulling or damaging structure object
CN107178037A (en) * 2017-05-31 2017-09-19 中交二公局第工程有限公司 The outer frame connecting structure of trestle vase-shaped column-type pier pier shaft and its construction technology
JP7456970B2 (en) 2021-04-22 2024-03-27 大成建設株式会社 Scaffolding unit and framework construction method

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