JP2015059407A - Concrete block curing device for girder - Google Patents

Concrete block curing device for girder Download PDF

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JP2015059407A
JP2015059407A JP2013195894A JP2013195894A JP2015059407A JP 2015059407 A JP2015059407 A JP 2015059407A JP 2013195894 A JP2013195894 A JP 2013195894A JP 2013195894 A JP2013195894 A JP 2013195894A JP 2015059407 A JP2015059407 A JP 2015059407A
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flange
web
girder
frame
bottom plate
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JP6038753B2 (en
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徳人 松本
Norihito Matsumoto
徳人 松本
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Toko Inc
Kawada Construction Co Ltd
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Toko Inc
Kawada Construction Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a concrete block curing device for girder that can follow up change in girder height, does not require processing for each curing block, and can recycle a curing material.SOLUTION: A concrete block curing device 1 for girder includes a pair of bag bodies 6b, 6c for flange and web arranged on a lower surface of a projection flange 3 of a floor slab 2; a bag body 6a for bottom slab arranged on a lower surface of a bottom slab 4; a frame 7a for bottom slab and frames 7b, 7c for flange and web which support them. Hanging parts 7b2, 7c2 of the frames 7b, 7c for flange and web have a length corresponding to a maximum girder height part, and the bag bodies 6b, 6c for flange and web have a length which is long enough to cover the maximum girder height part. Even at a minimum girder height part, the frame 7a for bottom slab and frames 7b, 7c for flange and web are slid and moved to be used.

Description

この発明は、張出架設工法で構築する桁用コンクリートブロック型枠解体後のコンクリートの養生装置であって、詳しくは養生材に気体注入で膨張する袋体を用いるバルーン型の養生装置に関するものである。   TECHNICAL FIELD The present invention relates to a concrete curing device after dismantling a concrete block mold for a girder constructed by an overhang construction method, and more particularly to a balloon-type curing device that uses a bag body that expands by gas injection into a curing material. is there.

橋梁の構築方法の１つとして張出架設工法があるが、移動式作業車によってサイクル施工する場合、少なくとも１ブロック毎にコンクリートを打設し、そのブロックのコンクリートが所定強度発現した後型枠を解体し、移動式作業車を前方の新設側に移動している。この時、コンクリートが急冷し、旧ブロックに拘束されてひび割れが発生することを防止するために、各種の対策が立てられている。   There is an overhanging construction method as one of the construction methods of the bridge, but when carrying out cycle construction with a mobile work vehicle, concrete is placed at least for each block, and the formwork after the concrete of the block expresses a predetermined strength It is dismantled and the mobile work vehicle is moved to the new front side. At this time, various measures are taken in order to prevent the concrete from rapidly cooling and being restrained by the old block and causing cracks.

既設コンクリートブロックにおける急激な温度低下に起因するひび割れを防止する養生装置としては、例えば特許文献１に記載されるような養生装置があった。
特開２００８−３０８９６２号公報 As a curing device for preventing cracks resulting from a rapid temperature drop in an existing concrete block, there is a curing device as described in Patent Document 1, for example.
JP 2008-308962 A

この養生装置は、図４に示すように、桁Ａを移動式作業車Ｂを用いて張出し施工によって構築する場合に、型枠解体後の既設コンクリートブロック１００に対し、床版の張出しフランジ下面と底版下面及びウェブ外面に断熱養生材１０１を圧着し、その外周縁部および中央部に木製等の縦枠材及び横枠材からなる枠型フレーム１０２を設け、これに断熱養生材１０１を適宜固定する構成であった。   As shown in FIG. 4, this curing device has a lower surface of an overhang flange of a floor slab with respect to an existing concrete block 100 after the formwork is dismantled when the beam A is constructed by overhang construction using a mobile work vehicle B. A heat-insulating curing material 101 is pressure-bonded to the bottom surface of the bottom plate and the outer surface of the web, and a frame-type frame 102 made of a vertical frame material and a horizontal frame material such as wooden is provided at the outer peripheral edge and the center, and the heat-insulating curing material 101 is appropriately fixed thereto. It was the composition to do.

この従来の養生装置に用いる断熱養生材１０１は、発泡スチロールなどの発泡合成樹脂を用いており、桁高あるいは橋軸方向のブロック幅に応じて適宜切断して利用するものであった。   The heat-insulating curing material 101 used in this conventional curing apparatus uses foamed synthetic resin such as expanded polystyrene, and is used by cutting appropriately according to the height of the girder or the block width in the bridge axis direction.

しかし、従来の桁用コンクリートブロック養生装置では、養生材に用いる発泡合成樹脂を養生ブロック毎にその都度切断加工する煩雑さに加え、加工された養生材の再利用が困難となって、産業廃棄物が増大するという問題点があった。   However, in the conventional concrete block curing equipment for girders, in addition to the complexity of cutting and processing the foamed synthetic resin used for the curing material for each curing block, it becomes difficult to reuse the processed curing material, resulting in industrial disposal. There was a problem that things increased.

この発明は、従来の桁用コンクリートブロック養生装置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、桁高の変化に追従でき、養生ブロック毎の加工を必要とせず、しかも養生材の再利用も可能とする桁用コンクリートブロック養生装置を提供することを目的としている。   This invention is made to solve the above-mentioned problems of the conventional concrete block curing device for girders, can follow the change of the girder height, does not require processing for each curing block, The purpose of the present invention is to provide a concrete block curing device for girders that can be reused.

上記課題を解決するため、この発明の桁用コンクリートブロック養生装置は、張出架設工法で構築する桁用コンクリートブロックを養生するため、コンクリート型枠を脱型した床版の張出しフランジ下面と底版下面とウェブ外面に夫々密着する養生材と、これらの養生材を支持するフレームとを備える桁用コンクリートブロック養生装置において、前記養生材は、前記底版下面に配置し気体注入で膨張する底版用袋体と、この底版用袋体の両側外方にあって前記張出しフランジ下面及びこれに連なる前記ウェブ外面に配置し気体注入で膨張する一対のフランジ・ウエブ用袋体を有し、前記フレームは、底版型枠支持梁に固定し前記底版用袋体を支持する底版用フレームと、前記張出しフランジ下面に配置する外型枠支持梁に固定し前記フランジ・ウエブ用袋体を支持固定する略Ｌ字形状のフランジ・ウエブ用フレームを有することを特徴とするものである。   In order to solve the above-mentioned problems, the concrete block curing device for girders of the present invention is designed to cure the concrete blocks for girders constructed by the overhanging construction method. In the concrete block curing apparatus for girders comprising a curing material that adheres closely to the outer surface of the web and a frame that supports these curing materials, the curing material is disposed on the bottom surface of the bottom plate and expands by gas injection. And a pair of flange and web bags which are disposed on both sides of the bottom plate bag body and are arranged on the lower surface of the overhanging flange and the outer surface of the web connected thereto, and expand by gas injection. A bottom plate frame fixed to a formwork support beam and supporting the bottom plate bag body, and an outer formwork support beam arranged on a lower surface of the overhanging flange and fixed to the flange - it is characterized in that it has a flange-web frame of substantially L-shaped supporting and fixing the web bag body.

底版用袋体及び一対のフランジ・ウエブ用袋体には夫々送風機が接続する。各送風機は熱源送風手段に接続しており、各袋体に熱風を送り込む。底版用フレーム及びフランジ・ウエブ用フレームに固定する各袋体は熱風で膨張する際にはコンクリート面に密着するが、送風停止後には収縮して略平坦となり、コンクリート面から離隔する。   A blower is connected to the bottom plate bag and the pair of flange and web bags. Each blower is connected to a heat source blower and feeds hot air into each bag. Each bag body fixed to the bottom plate frame and the flange / web frame adheres closely to the concrete surface when expanded by hot air, but shrinks and becomes substantially flat after the air blow is stopped, and is separated from the concrete surface.

底版用フレームは、底版型枠を解体移動した後の底版型枠支持梁に載置固定する袋体支持材を有する。張出しフランジの下面型枠とウェブの型枠を解体移動した後、外型枠支持梁にフランジ・ウエブ用フレームの上辺部を載置固定する。   The bottom plate frame includes a bag support material that is placed and fixed on the bottom plate formwork support beam after the bottom plate formwork is disassembled and moved. After disassembling and moving the lower surface formwork of the overhanging flange and the web formwork, the upper side of the flange / web frame is placed and fixed on the outer formwork support beam.

請求項２記載の桁用コンクリートブロック養生装置のフランジ・ウエブ用袋体は、最大桁高部を被覆し得る桁高追従袋体であって、前記フランジ・ウエブ用フレームはこの桁高追従袋体を固定する垂下部を有することを特徴とするものである。   The flange / web bag body of the concrete block curing device for girders according to claim 2 is a girder height following bag body capable of covering the maximum girder height portion, and the flange / web frame is the girder height following bag body. It has the drooping part which fixes A., It is characterized by the above-mentioned.

垂下部は、その外面に側方支持材を取り付け桁高追従袋体をコンクリート面に密着する。   The hanging part attaches a side support material to the outer surface of the hanging part, and closely attaches the girder height following bag body to the concrete surface.

この発明の桁用コンクリートブロック養生装置は、気体注入で膨張する底版用袋体と一対のフランジ・ウエブ用袋体を有するので、養生時には熱風を送風して膨張させ、養生終了後には縮小することができる。袋体は三分割されており、夫々が独立したフレームに固定されているので養生材の設置及び撤去が容易になる。   The concrete block curing device for girders of the present invention has a bottom plate bag body that expands by gas injection and a pair of flange and web bag bodies. When curing, it blows hot air to expand and shrinks after curing. Can do. Since the bag body is divided into three parts and each is fixed to an independent frame, the curing material can be easily installed and removed.

請求項２記載の桁用コンクリートブロック養生装置は桁高追従袋体とフレーム垂下部を有するので、最小桁高部から最大桁高部までを同一のフランジ・ウエブ用袋体で養生できる。従って、本養生装置は桁高の変化に追従でき、養生ブロック毎に養生材やフレームの加工を必要としない。このため養生材は当初のままなので再利用も可能となる。   Since the concrete block curing device for girders according to claim 2 has the girder following bag body and the frame hanging part, it is possible to cure the minimum girder height portion to the maximum girder height portion with the same flange / web bag body. Therefore, this curing device can follow the change in the digit height and does not require the processing of the curing material or the frame for each curing block. For this reason, since the curing material is as it is, it can be reused.

張出架設工法で構築する桁用コンクリートブロックに養生装置を取り付ける正面図である。It is a front view which attaches a curing device to the concrete block for girders constructed | assembled by the overhang construction method. 図１のII−II断面を示す断面図である。It is sectional drawing which shows the II-II cross section of FIG. 最小桁高部のコンクリートブロックに養生装置を取り付ける断面図である。It is sectional drawing which attaches a curing device to the concrete block of the minimum digit height part. 従来の張出架設工法で構築する桁用コンクリートブロックに養生装置を取り付ける正面図である。It is a front view which attaches a curing device to the concrete block for girders constructed | assembled by the conventional overhang construction method.

次にこの発明の実施の形態を添付図面に基づき詳細に説明する。図１は張出架設工法で構築する桁用コンクリートブロックに養生装置を取り付ける正面図、図２は図１のII−II断面を示す断面図である。   Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of attaching a curing device to a concrete block for girders constructed by an overhanging construction method, and FIG. 2 is a cross-sectional view showing a II-II cross section of FIG.

桁Ａを移動式作業車Ｂを用いて張出し施工によって構築する場合、解体された型枠Ｃは前進移動して転用されるため、脱型後の既設コンクリートブロックには桁用コンクリートブロック養生装置１が設置される。   When the girder A is constructed by overhanging using the mobile work vehicle B, the dismantled formwork C is moved forward and diverted. Therefore, the existing concrete block after demolding is applied to the concrete block curing device 1 for the girder. Is installed.

桁用コンクリートブロック養生装置１は、図２に示すようにコンクリート型枠を脱型した床版２の張出しフランジ３の下面と底版４の下面とウェブ５の外面に夫々密着する養生材６と、これらの養生材６を支持するフレーム７を備える。   A concrete block curing device 1 for a girder includes a curing material 6 that is in close contact with the lower surface of the overhanging flange 3 of the floor slab 2, the lower surface of the bottom slab 4, and the outer surface of the web 5, as shown in FIG. A frame 7 for supporting these curing materials 6 is provided.

この養生材６は、底版４の下面に配置し、気体注入で膨張する底版用袋体６ａと、この底版用袋体６ａの両側外方にあって張出しフランジ３の下面及びこれに連なるウェブ５の外面に配置する一対のフランジ・ウエブ用袋体６ｂ，６ｃを有し、これらを支持するフレーム７は、底版用フレーム７ａとフランジ・ウエブ用フレーム７ｂ、７ｃである。   The curing material 6 is disposed on the bottom surface of the bottom plate 4 and expands by injecting gas. The bottom plate bag body 6a, the bottom surface of the bottom plate bag body 6a, the bottom surface of the overhang flange 3, and the web 5 connected thereto. A pair of flange / web bag bodies 6b, 6c arranged on the outer surface of the frame 7 and a frame 7 for supporting them are a bottom plate frame 7a and flange / web frames 7b, 7c.

底版用フレーム７ａは底版型枠支持梁８に固定する袋体支持梁７ａ１と、この上面に載置する横架材７ａ２より構成される。底版型枠Ｃを解体移動した後、底版用フレーム７ａを底版型枠支持梁８に沿ってスライド移動することで底版用袋体６ａを容易に桁高に追従することができる。   The bottom plate frame 7a includes a bag support beam 7a1 fixed to the bottom plate formwork support beam 8, and a horizontal member 7a2 placed on the upper surface. After the bottom plate mold C is disassembled and moved, the bottom plate bag 6a can easily follow the digit height by sliding the bottom plate frame 7a along the bottom plate form support beam 8.

フランジ・ウエブ用フレーム７ｂ、７ｃは外型枠支持梁９に固定する張出部７ｂ１，７ｃ１と、これら張出部７ｂ１，７ｃ１と夫々回動可能に連結する垂下部７ｂ２，７ｃ２とを有する。   The flange / web frames 7b and 7c have projecting portions 7b1 and 7c1 fixed to the outer form frame support beam 9, and hanging portions 7b2 and 7c2 rotatably connected to the projecting portions 7b1 and 7c1, respectively.

これら垂下部７ｂ２，７ｃ２は最大桁高部に相当する長さを有し、フランジ・ウエブ用袋体６ｂ、６ｃも最大桁高部を被覆し得る長さを有する。この桁高追従のフランジ・ウエブ用袋体６ｂ、６ｃは、張出しフランジ３の図示しない下面型枠と、ウェブ５の図示しない外型枠を解体移動した後、外型枠支持梁９に張出部７ｂ１，７ｃ１を夫々載置固定する。   The hanging portions 7b2 and 7c2 have a length corresponding to the maximum girder portion, and the flange / web bag bodies 6b and 6c also have a length capable of covering the maximum girder portion. The flange-web bag bodies 6b and 6c that follow the girder height are extended to the outer mold support beam 9 after dismantling and moving the lower mold (not shown) of the flange 3 and the outer mold (not shown) of the web 5. The parts 7b1 and 7c1 are placed and fixed, respectively.

これらの養生材６は、型枠撤去後のコンクリート表面のひび割れを防止するために用いる部材で、合成繊維、合成樹脂、天然ゴムの単体又はこれらの複合素材からなり、橋軸方向と平行に配置する各隔壁６ａ１，６ｂ１，６ｃ１によって複数の袋体に分割されており、隣接する袋体は連通している。これらの袋体は収縮状態で設置し、空気流入口を図示しないホース、送風機及び熱源送風手段に接続し、各袋体に熱風を送り込み、養生材６を膨らませて、既設コンクリートの表面に密着させる。又、送風を停止し、空気を排出することで収縮させ、平坦状態にする。   These curing materials 6 are members used to prevent cracks in the concrete surface after the formwork is removed, and are made of synthetic fibers, synthetic resins, natural rubber alone or a composite material thereof, and are arranged in parallel with the bridge axis direction. Each of the partition walls 6a1, 6b1, 6c1 is divided into a plurality of bags, and the adjacent bags communicate with each other. These bags are installed in a contracted state, the air inlet is connected to a hose, a blower, and a heat source blower (not shown), hot air is sent into each bag, and the curing material 6 is inflated to adhere to the surface of the existing concrete. . Further, the air blowing is stopped and the air is exhausted to be contracted to be in a flat state.

フランジ・ウエブ用フレーム７ｂ、７ｃの垂下部７ｂ２，７ｃ２に固定するフランジ・ウエブ用袋体６ｂ、６ｃは、袋体に裁縫した図示しないピケットにて垂下部７ｂ２，７ｃ２に紐等で固定する。   The flange / web bags 6b and 6c fixed to the hanging parts 7b2 and 7c2 of the flange / web frames 7b and 7c are fixed to the hanging parts 7b2 and 7c2 with a string or the like by pickets (not shown) sewn on the bag.

又垂下部７ｂ２，７ｃ２は移動作業車Ｂの外周足場Ｄに控え７ｂ３，７ｃ３をとって固定し、袋体をコンクリート面に密着させる。   The hanging portions 7b2 and 7c2 are secured to the outer periphery scaffold D of the mobile work vehicle B by holding backs 7b3 and 7c3 so that the bag is in close contact with the concrete surface.

次に最小桁高部における養生装置の取付状態を図３に基づき説明する。図３は最小桁高部のコンクリートブロックに養生装置を取り付ける断面図である。   Next, the mounting state of the curing device at the minimum digit height will be described with reference to FIG. FIG. 3 is a cross-sectional view of attaching the curing device to the concrete block at the minimum digit height.

各養生材６及びフレーム７は、図１及び図２に示す大きさのものをそのままスライドして使用する。即ち、底版用フレーム７ａは底版型枠支持梁８に沿ってスライド移動させ、底版用袋体６ａを底版４に密着させる。   Each of the curing materials 6 and the frame 7 is slid and used as it is in the size shown in FIGS. That is, the bottom plate frame 7 a is slid along the bottom plate formwork support beam 8 to bring the bottom plate bag 6 a into close contact with the bottom plate 4.

又フランジ・ウエブ用フレーム７ｂ、７ｃも外型枠支持梁９に沿ってスライド移動し、垂下部７ｂ２，７ｃ２は底板４の下方に突出する。   Also, the flange and web frames 7 b and 7 c slide along the outer frame support beam 9, and the hanging portions 7 b 2 and 7 c 2 protrude below the bottom plate 4.

１ 桁用コンクリートブロック養生装置
２ 床版
３ 張出フランジ
４ 底版
５ ウエブ
６ 養生材
６ａ 底版用袋体
６ｂ フランジ・ウエブ袋体
６ｃ フランジ・ウエブ袋体
７ フレーム
７ｂ フランジ・ウエブ用フレーム
７ｃ フランジ・ウエブ用フレーム
８ 底版型枠支持梁
９ 外型枠支持梁 1 Girder concrete block curing device 2 Floor slab 3 Overhang flange 4 Bottom slab 5 Web 6 Curing material 6a Bottom plate bag 6b Flange / web bag body 6c Flange / web bag body 7 Frame 7b Flange / web frame 7c Flange / web Frames 8 Bottom formwork support beams 9 Outer formwork support beams

Claims (2)

張出架設工法で構築する桁用コンクリートブロックを養生するため、コンクリート型枠を脱型した床版の張出しフランジ下面と底版下面とウェブ外面に夫々密着する養生材と、これらの養生材を支持するフレームとを備える桁用コンクリートブロック養生装置において、前記養生材は、前記底版下面に配置し気体注入で膨張する底版用袋体と、この底版用袋体の両側外方にあって前記張出しフランジ下面及びこれに連なる前記ウェブ外面に配置し気体注入で膨張する一対のフランジ・ウエブ用袋体を有し、前記フレームは、底版型枠支持梁に固定し前記底版用袋体を支持する底版用フレームと、前記張出しフランジ下面に配置する外型枠支持梁に固定し前記フランジ・ウエブ用袋体を支持固定する略Ｌ字形状のフランジ・ウエブ用フレームを有することを特徴とする桁用コンクリートブロック養生装置。 In order to cure the concrete blocks for girders constructed by the overhang construction method, the curing material that adheres to the underside of the overhanging flange, the bottom of the bottom plate, and the web outer surface of the floor slab from which the concrete form was removed, and these curing materials are supported. In the concrete block curing device for a girder comprising a frame, the curing material is disposed on the bottom surface of the bottom plate and expands by gas injection, and the bottom surface of the overhanging flange on both sides of the bottom plate bag body. And a pair of flange and web bags which are arranged on the outer surface of the web and which are expanded by gas injection, and the frame is fixed to a bottom plate frame support beam and supports the bottom plate bag And a substantially L-shaped flange / web frame fixed to an outer frame support beam arranged on the lower surface of the overhanging flange and supporting and fixing the flange / web bag body. Digit Concrete blocks for curing device, characterized by. 前記フランジ・ウエブ用袋体は、最大桁高部を被覆し得る桁高追従袋体であって、前記フランジ・ウエブ用フレームはこの桁高追従袋体を固定する垂下部を有することを特徴とする請求項1記載の桁用コンクリートブロック養生装置。 The flange / web bag body is a girder following bag body capable of covering the maximum girder height portion, and the flange / web frame has a hanging portion for fixing the girder height following bag body. The concrete block curing device for girders according to claim 1.
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CN105648915A (en) * 2015-12-31 2016-06-08 中国葛洲坝集团第五工程有限公司 Hanging basket construction device for asymmetric arc-shaped variable cross-section thin wing plate box girder
CN107130625A (en) * 2017-05-12 2017-09-05 中国港湾工程有限责任公司 Constructing tie beam based on pile foundation can adjust mould bases
CN107988910A (en) * 2017-12-07 2018-05-04 中铁二十局集团第六工程有限公司 A kind of upstroke movable framework template overall pulling down method
CN107988910B (en) * 2017-12-07 2019-03-01 中铁二十局集团第六工程有限公司 A kind of upstroke movable framework template overall pulling down method
CN108824212A (en) * 2018-07-31 2018-11-16 中铁六局集团石家庄铁路建设有限公司 A kind of means of defence that continuous beam suspended bracket cantilever method is constructed to existing traffic
CN110205943A (en) * 2019-06-29 2019-09-06 中国二十二冶集团有限公司 The construction method of prefabricated freely-supported small box girder end floor beam
CN111005317A (en) * 2019-12-03 2020-04-14 中交第二航务工程局有限公司 Hanging basket variable-section inner cavity adjustable fixed steel inner mold device and construction method
CN111005317B (en) * 2019-12-03 2021-06-22 中交第二航务工程局有限公司 Hanging basket variable-section inner cavity adjustable fixed steel inner mold device and construction method
CN111254804A (en) * 2020-02-18 2020-06-09 中交路桥建设有限公司 Construction method of steel box girder bridge of overpass highway
CN112549273A (en) * 2020-12-29 2021-03-26 山东双端数字科技有限公司 Segmental box girder spraying maintenance system
CN115369771A (en) * 2022-09-03 2022-11-22 南通路桥工程有限公司 Novel cast-in-place support system of steel-concrete composite beam bridge deck cantilever
CN115369771B (en) * 2022-09-03 2023-08-25 南通路桥工程有限公司 Cast-in-situ bracket system for cantilever of reinforced concrete composite beam bridge deck

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