JP5711179B2 - Construction method of superstructure in elevated structure - Google Patents

Construction method of superstructure in elevated structure Download PDF

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JP5711179B2
JP5711179B2 JP2012093443A JP2012093443A JP5711179B2 JP 5711179 B2 JP5711179 B2 JP 5711179B2 JP 2012093443 A JP2012093443 A JP 2012093443A JP 2012093443 A JP2012093443 A JP 2012093443A JP 5711179 B2 JP5711179 B2 JP 5711179B2
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column head
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孝一 島津
孝一 島津
西村　修
修 西村
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川田建設株式会社
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Description

本発明は、橋梁などの高架構造物における上部工の構築方法に関する。   The present invention relates to a method for constructing a superstructure in an elevated structure such as a bridge.

片持ち張出架設により橋梁上部工を構築する際、基本的には、まず脚頭部（下部工）の上に柱頭部（上部工）を構築し、次いで柱頭部の側方へ先端ブロック（張出しブロック）を連続的に構築していくという方法が実施されており、より具体的な構築方法としては、特開平０６−２３５２０８号公報に記載されているような方法が知られている。   When constructing a bridge superstructure by cantilever construction, basically the column head (superstructure) is first constructed on the leg head (substructure), then the tip block ( A method of continuously constructing the overhanging block) is carried out, and as a more concrete construction method, a method as described in JP-A-06-235208 is known.

特開平０６−２３５２０８号公報Japanese Patent Laid-Open No. 06-235208

特開平０６−２３５２０８号公報に記載の上部工の構築方法においては、柱頭部（Ａ）の構築に使用した下段作業台（１６）を、第１先端ブロック（Ｂ）の下方の位置へ移動させる際、下段作業台（１６）を斜め上方から吊って（トラベラー（３０）上に配置された横梁（３２）のうち、下段作業台（１６）の各支持点の外側斜め上方に位置する横梁（３２）から、斜め下方へ向かって垂下させたチェーンブロック（３６）によって下段作業台（１６）を吊り下げて）、下段作業台（１６）と脚頭部（１０ａ）との間に張設したレバー式チェーンブロック（４０）（おしみ）を緩めていくことにより、下段作業台（１６）の重量を利用して第１先端ブロック（Ｂ）の構築位置へ移動させている。   In the superstructure construction method described in Japanese Patent Application Laid-Open No. 06-235208, the lower work table (16) used for construction of the column head (A) is moved to a position below the first tip block (B). At this time, the lower work platform (16) is suspended from the upper side (of the cross beams (32) arranged on the traveler (30), the horizontal beam positioned diagonally above and outside the respective support points of the lower work table (16) ( 32) is suspended between the lower platform (16) and the leg head (10a) by suspending the lower platform (16) by a chain block (36) suspended obliquely downward. By loosening the lever-type chain block (40) (stain), the weight of the lower workbench (16) is used to move to the construction position of the first tip block (B).

このような方法によって下段作業台（１６）を移動させる場合において、万が一「おしみ」が切れてしまった場合、下段作業台（１６）が大きく揺動し、非常に危険である。   When moving the lower workbench (16) by such a method, if the “stain” breaks out, the lower workbench (16) is greatly swung, which is extremely dangerous.

本発明は、上記のような従来技術の問題を解決しようとするものであって、下段作業台の移動を安全に実施することができる高架構造物における上部工の構築方法を提供することを目的とする。   The present invention is intended to solve the above-described problems of the prior art, and an object of the present invention is to provide a method for constructing an upper work in an elevated structure that can safely move a lower workbench. And

本発明に係る高架構造物における上部工の構築方法は、脚頭部に対し、ブラケット、下段作業台、及び、底版型枠支持部材を含む柱頭部支保工を形成し、この柱頭部支保工の上に柱頭部型枠を形成し、柱頭部型枠内にコンクリートを打設し、養生、緊張、及び、脱型の各工程を経て、柱頭部を構築し、トラベラーを組み立て、構築された柱頭部上に固定し、ブラケットの上、及び、トラベラーの上に移動台車をそれぞれ配置し、トラベラー上の移動台車に上端を係止させた懸吊手段（チェーン、ワイヤー、又は、鋼棒）により、下段作業台の外側吊支点を吊支させて、下段作業台の外側寄りの部分をトラベラー上の移動台車によって支持させるとともに、下段作業台の内側寄りの部分をブラケット上の移動台車によって支持させ、移動台車をそれぞれ柱頭部の外側へ向かって移動させていき、下段作業台を、第１先端ブロックの構築位置の下方まで移動させ、トラベラーから垂下させた吊り柱に下段作業台を固定し、吊り柱によって下段作業台を支持させることを特徴としている。   The construction method of the superstructure in the elevated structure according to the present invention is to form a column head support work including a bracket, a lower work table, and a bottom plate formwork support member for the leg head. Forming the head of the column head, placing concrete in the head of the column head, going through the curing, tension, and demolding processes, building the head of the column, assembling the traveler, By means of suspension means (chain, wire, or steel bar) fixed on the part, arranged on the bracket and on the traveler, respectively, and the upper end of the moving carriage on the traveler is locked. The outer suspension fulcrum of the lower platform is suspended and the portion closer to the outer side of the lower platform is supported by the moving carriage on the traveler, and the portion closer to the inner side of the lower platform is supported by the moving carriage on the bracket. Moving cart Move to the outside of each column head, move the lower platform to below the construction position of the first tip block, fix the lower platform to the suspension column suspended from the traveler, It is characterized by supporting the lower workbench.

尚、ブラケット上の移動台車と脚頭部との間に、おしみ手段（チェーン又はワイヤー）を張設しておくことが好ましい。   In addition, it is preferable that tension means (chain or wire) is stretched between the movable carriage on the bracket and the leg head.

本発明に係る高架構造物における上部工の構築方法によれば、柱頭部の構築に使用した下段作業台を、第１先端ブロックの下方の位置へ移動させる作業を、安全かつ円滑に実施することができる。また、下段作業台を第１先端ブロックの構築位置の下方まで移動させる際、ブラケット上の移動台車と脚頭部との間に、おしみ手段を張設した場合には、下段作業台の逸走防止という効果を期待することができる。   According to the construction method of the superstructure in the elevated structure according to the present invention, the operation of moving the lower work table used for the construction of the column head to a position below the first tip block is performed safely and smoothly. Can do. In addition, when moving the lower work platform to below the construction position of the first tip block, if a squeezing means is stretched between the moving carriage on the bracket and the leg head, the lower work platform is prevented from running away. Can be expected.

図１は、本発明に係る「高架構造物における上部工の構築方法」の実施形態の説明図であって、柱頭部Ａの構築方法の説明図である。FIG. 1 is an explanatory diagram of an embodiment of a “method for constructing a superstructure in an elevated structure” according to the present invention, and is an explanatory diagram of a method for constructing a column head A. 図２は、本発明に係る「高架構造物における上部工の構築方法」の実施形態の説明図であって、第１先端ブロックＢの構築方法の説明図である。FIG. 2 is an explanatory diagram of an embodiment of a “method for constructing superstructure in an elevated structure” according to the present invention, and is an explanatory diagram of a method for constructing a first tip block B. 図３は、本発明に係る「高架構造物における上部工の構築方法」の実施形態の説明図であって、第１先端ブロックＢの構築方法の説明図である。FIG. 3 is an explanatory diagram of an embodiment of the “method for constructing superstructure in an elevated structure” according to the present invention, and is an explanatory diagram of a method for constructing the first tip block B. 図４は、本発明に係る「高架構造物における上部工の構築方法」の実施形態の説明図であって、第１先端ブロックＢの構築方法の説明図である。FIG. 4 is an explanatory diagram of an embodiment of the “method for constructing superstructure in an elevated structure” according to the present invention, and is an explanatory diagram of a method for constructing the first tip block B. 図５は、本発明に係る「高架構造物における上部工の構築方法」の実施形態の説明図であって、第２先端ブロックＣの構築方法の説明図である。FIG. 5 is an explanatory diagram of an embodiment of a “method for constructing superstructure in an elevated structure” according to the present invention, and is an explanatory diagram of a method for constructing a second tip block C.

以下、添付図面に沿って、本発明「高架構造物における上部工の構築方法」の実施形態について説明する。   Hereinafter, an embodiment of the “method for constructing an upper work in an elevated structure” of the present invention will be described with reference to the accompanying drawings.

（１．柱頭部Ａの構築）
まず、図１（１）に示すように、橋脚１０（下部工）を構築した段階で、脚頭部１０ａにブラケット１２を取着する。次に、図１（２）に示すように、ブラケット１２の上に下段作業台１６を設置し、更に、下段作業台１６上に、支持手段１８を介して底版型枠支持部材２０を設置する。 (1. Construction of column head A)
First, as shown in FIG. 1 (1), the bracket 12 is attached to the leg head 10a when the pier 10 (undercarriage) is constructed. Next, as shown in FIG. 1 (2), a lower work platform 16 is installed on the bracket 12, and a bottom plate formwork support member 20 is installed on the lower work platform 16 via support means 18. .

このようにして、脚頭部１０ａに対し、ブラケット１２、下段作業台１６、支持手段１８、及び、底版型枠支持部材２０からなる柱頭部支保工２２を形成する。そして、この柱頭部支保工２２の上に、底版型枠２４（図１（３）参照）、及び、張出型枠（図示せず）等からなる柱頭部型枠を形成する。そして、柱頭部型枠内にコンクリートを打設し、養生、緊張、及び、脱型の各工程を経て、柱頭部Ａを構築する。   In this way, the column head support 22 composed of the bracket 12, the lower work table 16, the support means 18, and the base plate form support member 20 is formed on the leg head 10a. Then, a column head formwork including a bottom plate formwork 24 (see FIG. 1 (3)), an overhang formwork (not shown), and the like is formed on the pillar head support structure 22. Then, concrete is placed in the column head formwork, and the column head A is constructed through the steps of curing, tension, and demolding.

（２．第１先端ブロックＢの構築）
図２（１）に示すように、トラベラー３０（移動構築装置）を組み立て、構築された柱頭部Ａ上に固定する。そして、図２（２）に示すように、吊り柱３４の上端をトラベラー３０に固定する。 (2. Construction of the first tip block B)
As shown in FIG. 2 (1), the traveler 30 (moving construction apparatus) is assembled and fixed on the constructed column head A. Then, as shown in FIG. 2 (2), the upper end of the suspension pillar 34 is fixed to the traveler 30.

続いて、下段作業台１６、及び、底版型枠支持部材２０等を、次のような手順により、第１先端ブロックＢの構築位置へ移動する。まず、図３（１）に示すように、ブラケット１２の上（ブラケット１２と下段作業台１６の間）、及び、トラベラー３０の上に、移動台車４０（無端ころ等）をそれぞれ配置する。尚、これらの移動台車４０のうち、ブラケット１２上の移動台車４０ａについては、下段作業台１６の脚頭部１０ａ側の支持点（内側支持点１６ａ）を支持できる位置（後方横梁の直下）に配置し、トラベラー３０上の移動台車４０ｂについては、下段作業台１６の外側（脚頭部１０ａとは反対の側）の吊支点（外側吊支点１６ｂ）の鉛直上方（前方横梁の鉛直上方）の位置に配置する。   Subsequently, the lower workbench 16 and the bottom mold support member 20 are moved to the construction position of the first tip block B by the following procedure. First, as shown in FIG. 3 (1), a movable carriage 40 (endless rollers or the like) is arranged on the bracket 12 (between the bracket 12 and the lower work table 16) and on the traveler 30. Of these moving carriages 40, the moving carriage 40a on the bracket 12 is located at a position where it can support the support point (inner support point 16a) on the leg head 10a side of the lower workbench 16 (directly below the rear lateral beam). The moving carriage 40b disposed on the traveler 30 is located vertically above the suspension fulcrum (outside suspension fulcrum 16b) outside the lower work platform 16 (on the side opposite to the leg head 10a) (vertically above the front cross beam). Place in position.

次に、トラベラー３０上の移動台車４０ｂに上端を係止させた外側チェーン３８（懸吊手段）により、下段作業台１６の外側吊支点１６ｂを吊支させる。そうすると、下段作業台１６は、外側寄りの部分が、トラベラー３０上の移動台車４０ｂによって支持され、内側寄りの部分が、ブラケット１２上の移動台車４０ａによって支持されることになる。尚、移動台車４０ａと脚頭部１０ａとの間には、レバー式チェーンブロック４２を介在させたおしみチェーン４４（おしみ手段）を張設しておく。   Next, the outer suspension fulcrum 16b of the lower platform 16 is suspended by an outer chain 38 (suspension means) whose upper end is locked to the moving carriage 40b on the traveler 30. Then, the lower work platform 16 is supported at the outer side by the moving carriage 40b on the traveler 30 and at the inner side by the moving carriage 40a on the bracket 12. In addition, a tasting chain 44 (staining means) with a lever-type chain block 42 interposed is stretched between the movable carriage 40a and the leg head 10a.

そして、移動台車４０ａ，４０ｂをそれぞれ柱頭部Ａの外側へ移動させていき、下段作業台１６を、第１先端ブロックＢの構築位置の下方（図３（２）に示す位置）まで移動させる。このとき、移動台車４０ａの移動に合わせて、レバー式チェーンブロック４２を操作し、おしみチェーン４４を少しずつ繰り出していく。   Then, the movable carriages 40a and 40b are respectively moved to the outside of the column head A, and the lower work table 16 is moved below the construction position of the first tip block B (position shown in FIG. 3 (2)). At this time, the lever-type chain block 42 is operated in accordance with the movement of the movable carriage 40a, and the diaper chain 44 is fed out little by little.

下段作業台１６の移動が完了したら、図４に示すように、下段作業台１６を吊り柱３４に対して固定し、吊り柱３４によって下段作業台１６を支持させ、移動台車４０ａ，４０ｂ、及び、外側チェーン３８（図３参照）を撤去する。そして、トラベラー３０から垂下させた型枠吊支チェーン４６によって底版型枠支持部材２０を吊り、下段作業台１６上の適正な位置に底版型枠支持部材２０をセットし、底版型枠２４、及び、他の型枠（図示せず）をそれぞれ配置して第１先端ブロック型枠を形成する。そして、第１先端ブロック型枠内にコンクリートを打設し、養生、緊張、及び、脱型の各工程を経て、第１先端ブロックＢを構築する。   When the movement of the lower platform 16 is completed, as shown in FIG. 4, the lower platform 16 is fixed to the suspension column 34, and the lower platform 16 is supported by the suspension column 34, and the movable carriages 40a, 40b, and The outer chain 38 (see FIG. 3) is removed. Then, the base plate form support member 20 is suspended by the form support chain 46 suspended from the traveler 30, the base form support member 20 is set at an appropriate position on the lower work table 16, and the base form form 24, Then, another mold (not shown) is arranged to form a first tip block mold. And concrete is cast in the 1st tip block formwork, and the 1st tip block B is constructed through each process of curing, tension, and demolding.

（３．第２先端ブロックＣの構築）
第１先端ブロックＢが構築されたら、吊り柱３４を介して下段作業台１６を吊支した状態のトラベラー３０を、図５に示すように、第１先端ブロックＢの上に移動させる。尚、トラベラー３０を移動したら、下段作業台１６の後方足場４５をブラケット１２上で組み立て、構築済みの先端ブロックの仕上げ作業をこの後方足場４５上で行う。 (3. Construction of second tip block C)
When the first tip block B is constructed, the traveler 30 in a state where the lower workbench 16 is suspended via the suspension pillar 34 is moved onto the first tip block B as shown in FIG. When the traveler 30 is moved, the rear scaffold 45 of the lower work platform 16 is assembled on the bracket 12, and the finished work of the constructed tip block is performed on the rear scaffold 45.

また、第２先端ブロックＣの外側に、第３先端ブロックを構築する場合は、下段作業台１６を吊支した状態のトラベラー３０を、第２先端ブロックＣの上に移動させ、第２先端ブロックＣの構築と同様の手順で第３先端ブロックを構築する。第３先端ブロックの外側に第４先端ブロックを構築する場合も同様である。   Further, when constructing the third tip block outside the second tip block C, the traveler 30 in a state where the lower workbench 16 is suspended is moved onto the second tip block C, and the second tip block C The third tip block is constructed in the same procedure as the construction of C. The same applies when the fourth tip block is constructed outside the third tip block.

以上に説明したような方法によって高架構造物における上部工を構築すれば、柱頭部Ａの構築に使用した下段作業台１６を、第１先端ブロックＢの下方の位置へ移動させる作業を、安全かつ円滑に実施することができる。   If the superstructure in the elevated structure is constructed by the method as described above, the operation of moving the lower stage work table 16 used for constructing the column head A to the position below the first tip block B is safe and secure. It can be carried out smoothly.

尚、本実施形態においては、下段作業台１６の外側吊支点１６ｂを吊支させる懸吊手段、或いは、移動台車４０ａと脚頭部１０ａとの間に調節されるおしみ手段として、いずれもチェーンが用いられているが、チェーンの代わりにワイヤーを用いることもでき、前者については鋼棒を用いることもできる。   In this embodiment, the chain is used as a suspension means for supporting the outer suspension fulcrum 16b of the lower work table 16 or a squeezing means adjusted between the movable carriage 40a and the leg head 10a. Although used, a wire can be used instead of a chain, and a steel rod can be used for the former.

１０：橋脚、
１０ａ：脚頭部、
１２：ブラケット、
１６：下段作業台、
１６ａ：内側支持点、
１６ｂ：外側吊支点、
１８：支持手段、
２０：底版型枠支持部材、
２２：柱頭部支保工、
２４：底版型枠、
３０：トラベラー、
３４：吊り柱、
３８：外側チェーン、
４０，４０ａ，４０ｂ：移動台車、
４２：レバー式チェーンブロック、
４４：おしみチェーン、
４５：後方足場、
４６：型枠吊支チェーン、
Ａ：柱頭部、
Ｂ：第１先端ブロック、
Ｃ：第２先端ブロック 10: Pier
10a: leg head,
12: Bracket,
16: Lower platform,
16a: inner support point,
16b: outside hanging fulcrum,
18: Support means,
20: bottom plate formwork support member,
22: Pillar head support work,
24: Bottom plate formwork,
30: Traveler,
34: Suspension pole,
38: outer chain,
40, 40a, 40b: moving cart,
42: Lever type chain block,
44: Oshie chain,
45: Back scaffold,
46: Formwork suspension chain,
A: Column head,
B: First tip block,
C: Second tip block

Claims (2)

脚頭部に対し、ブラケット、下段作業台、及び、底板型枠支持部材を含む柱頭部支保工を形成し、この柱頭部支保工の上に柱頭部型枠を形成し、
柱頭部型枠内にコンクリートを打設し、養生、緊張、及び、脱型の各工程を経て、柱頭部を構築し、
トラベラーを組み立て、構築された柱頭部上に固定し、
ブラケットの上、及び、トラベラーの上に移動台車をそれぞれ配置し、
トラベラー上の移動台車に上端を係止させた懸吊手段により、下段作業台の外側吊支点を吊支させて下段作業台の外側寄りの部分をトラベラー上の移動台車によって支持させるとともに、下段作業台の内側寄りの部分をブラケット上の移動台車によって支持させ、
移動台車をそれぞれ柱頭部の外側へ向かって移動させていき、下段作業台を、第１先端ブロックの構築位置の下方まで移動させ、
移動が完了したら、トラベラーから垂下させた吊り柱に下段作業台を固定し、吊り柱によって下段作業台を支持させることを特徴とする高架構造物における上部工の構築方法。 For the leg head, form a column head support work including a bracket, a lower work table, and a bottom plate form frame support member, and form a column head form work on this column head support work,
Concrete is placed in the column head formwork, and after the curing, tension, and demolding processes, the column head is constructed.
Assemble the traveler, fix it on the built column head,
Place the moving carriage on the bracket and on the traveler,
The suspension means with the upper end locked to the traveling carriage on the traveler is used to suspend the outer suspension fulcrum of the lower platform so that the part closer to the outside of the lower platform is supported by the traveling carriage on the traveler. Support the part closer to the inside of the stand by the moving carriage on the bracket,
Move the movable carriage toward the outside of the column head, move the lower work platform to below the construction position of the first tip block,
The construction method of the superstructure in the elevated structure characterized by fixing the lower work platform to the suspension pillar suspended from the traveler and supporting the lower work platform by the suspension pillar when the movement is completed. 下段作業台を第１先端ブロックの構築位置の下方まで移動させる際、ブラケット上の移動台車と脚頭部との間に、おしみ手段を張設しておくことを特徴とする、請求項１に記載の高架構造物における上部工の構築方法。   The urging means is stretched between the movable carriage on the bracket and the leg head when the lower work platform is moved below the construction position of the first tip block. The construction method of the superstructure in the described elevated structure.
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