JP3837888B2 - Bridge girder continuous feeding device - Google Patents

Bridge girder continuous feeding device Download PDF

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JP3837888B2
JP3837888B2 JP36330797A JP36330797A JP3837888B2 JP 3837888 B2 JP3837888 B2 JP 3837888B2 JP 36330797 A JP36330797 A JP 36330797A JP 36330797 A JP36330797 A JP 36330797A JP 3837888 B2 JP3837888 B2 JP 3837888B2
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jack
bridge girder
lifting
jacks
horizontal
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JPH11172626A (en
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誠治 藤原
光弘 工藤
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石川島播磨重工業株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は橋梁の架設工事に使用する橋桁連続送り出し装置に関するものである。
【0002】
【従来の技術】
橋梁の架設工法の一つとして、予め、橋桁を架設地点以外で所要の長さに組み立てた後、該橋桁を架設地点まで長手方向へ水平に送り出して架設するようにさせる工法がある。
【0003】
かかる架設工法の概要を図4(イ)(ロ)(ハ)に示すと、先ず、図4(イ)に示す如く、ベースフレームa上の長手方向一端部位置に設置した水平ジャッキbと、該水平ジャッキbの駆動でベースフレームaの長手方向に沿って移動できるように組み付けた桁揚ジャッキcと、該桁揚ジャッキcの移動ストローク(通常1m)から外れたベースフレームaの長手方向他端部上に設置した仮受ジャッキdとからなる送り出し装置eを、地組ヤードや橋脚の天端面等の固定構造物f上に設置し、仮受ジャッキcを収納させた状態において、送り出し方向(矢印x)の後退側ストロークエンドに位置させておいた桁揚ジャッキcを伸長させて、該桁揚ジャッキc上に、クレーンを用いて所要長さに組み立てておいた橋桁gを載置させるようにする。なお、橋桁gの長手方向の他の所要個所は、橋桁gの送り量に応じて別の送り出し装置や補助台車にて受けられるようにしてある。hは桁受板を示す。
【0004】
上記の状態において、図4(ロ)に示す如く、水平ジャッキbを駆動して桁揚ジャッキcを送り出し方向へ前進移動させることにより、橋桁gを一定ストロークだけ送り出し方向へ送り出すようにする。次に、図4(ハ)に示す如く、仮受ジャッキdを伸長させて橋桁gの荷重を仮受ジャッキdに受けさせるようにし、この間に、収縮させた桁揚ジャッキcを水平ジャッキbの駆動で後退側ストロークエンド位置まで戻すようにする。
【0005】
しかる後、図4(イ)に示す如く、桁揚ジャッキcを伸長させ、且つ仮受ジャッキdを収縮させることにより、橋桁gの荷重を再び桁揚ジャッキcに移し、以後、上述した工程と同様な工程を繰り返すことにより、橋桁gを架設地点まで送り出し、架設地点で、降下設備を用いて橋桁gを降下させて架設するようにしている。
【0006】
【発明が解決しようとする課題】
ところが、橋桁gを水平に送り出すようにする上述した架設工法の場合、水平ジャッキbのストローク分だけ橋桁gを送り出すと、桁揚ジャッキcを元の位置へ戻すように後退させた後、再び前進させるようにする、いわゆる盛替え作業が必要となることから、橋桁gの連続送り出しを行うことができず、したがって、時間的ロスが大きくて効率的に作業を進めることができない、という問題がある。
【0007】
因に、2台の送り出し装置eを長手方向に縦列(直列)設置して、2台の送り出し装置eを交互に作動させるようにすれば、連続送り出しは可能となるが、送り出し装置eの設置場所が橋脚の天端面等ではスペース的に制約を受けるので、使用場所が限定される問題がある。
【0008】
そこで、本発明は、橋脚天端面等のスペース的に制約を受ける場所であっても支障なく設置することができて、橋桁を連続的に送り出すことができるようにすることにより、橋梁の架設工事に要する期間を大幅に短縮することができるような橋桁連続送り出し装置を提供しようとするものである。
【0009】
【課題を解決するための手段】
本発明は、上記課題を解決するために、橋桁を送り出す方向に延びるベースフレームの幅方向中央位置に、水平ジャッキの駆動でベースフレームの長手方向へ向けて所定の移動ストロークが得られるように桁揚ジャッキを鉛直に組み付け、且つ上記ベースフレーム上の中央の桁揚ジャッキを幅方向で挟む左右位置に、水平ジャッキの駆動でベースフレームの長手方向へ向けて所定の移動ストロークが得られるように桁揚ジャッキを鉛直に組み付け、更に、該左右の桁揚ジャッキの上端間に、橋桁を受けるためのビーム架台を着脱可能に掛け渡した構成とする。
【0010】
各ジャッキが並列に配置されていて、全長が抑えられていることから、設置場所のスペース的な制約を受けにくいものとすることができる。橋桁を送り出す場合は、中央の水平ジャッキによる中央の桁揚ジャッキの前進後退移動と、左右の水平ジャッキによる左右の桁揚ジャッキの前進後退移動とを交互に行わせ、且つ中央の桁揚ジャッキと左右の桁揚ジャッキ上のビーム架台との間で橋桁の受け渡しを行わせることにより、橋桁が連続的に送り出される。
【0011】
又、左右の桁揚ジャッキの上端間にビーム架台を着脱可能に掛け渡すことに代えて、左右いずれか一方の桁揚ジャッキの上端面部に、ビーム架台を水平方向へ回動可能又はスライド可能に保持させた構成とすることにより、中央の桁揚ジャッキの前進工程と、左右の桁揚ジャッキの後退工程とが交差するときに、ビーム架台を、中央の桁揚ジャッキの邪魔にならないように回動あるいはスライド変位させることができるので、より効率的に作業を進めることができる。
【0012】
更に、左右の桁揚ジャッキの載荷重を、中央の桁揚ジャッキの載荷重のそれぞれ半分に設定した構成とすることにより、左右の桁揚ジャッキに必要以上大型のものを使用することなく、合理的な設計となる。
【0013】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
【0014】
図1(イ)(ロ)(ハ)は本発明の実施の一形態を示すもので、橋桁1を送り出す方向(矢印X方向)に延びるベースフレーム2上に、幅方向の中央部と左右部に長手方向に延びるガイド溝3と4,5を設けたノンフリクションプレート6を固定し、上記中央のガイド溝3の長手方向の両端部よりもやや内側位置に、エンドプレート7a,7bを取り付けて、該エンドプレート7a,7b間にボールねじ11を回転自在に支持させ、且つ該ボールねじ11の一端部に、送り用モータ16を連結設置して、中央の水平ジャッキ8を構成し、又、上記左右のガイド溝4と5の長手方向の両端部に、それぞれエンドプレート12a,12bと13a,13bを取り付けて、該エンドプレート12a,12b間と13a,13b間にボールねじ14と15をそれぞれ回転自在に支持させ、且つこれらボールねじ14と15の一端部に、送り用モータ17と18を連結設置して、左右の水平ジャッキ9と10を構成する。
【0015】
又、上記中央のガイド溝3に、鉛直方向上向きに配置した桁揚ジャッキ19の基台部19aを嵌入配置し、且つ該基台部19aに、水平ジャッキ8のボールねじ11を貫通螺合させるようにして、水平ジャッキ8の駆動により桁揚ジャッキ19がガイド溝3にガイドされながら長手方向へ移動させられるようにすると共に、上記左右のガイド溝4,5に、鉛直方向上向きに配置した桁揚ジャッキ20,21の基台部20a,21aを嵌入配置し、且つ該基台部20a,21aに、それぞれ水平ジャッキ9,10のボールねじ14,15を貫通螺合させるようにして、水平ジャッキ9,10の同期駆動により桁揚ジャッキ20,21がガイド溝4,5にガイドされながら長手方向へ同時に移動させられるようにし、更に、上記左右の桁揚ジャッキ20,21の上端間に、橋桁1を中央部で受けるようにするためのビーム架台22を着脱自在に掛け渡す。
【0016】
なお、各桁揚ジャッキ19,20,21の移動ストロークは、たとえば、少なくとも1mとしてある。又、左右の桁揚ジャッキ20,21の載荷重は、中央の桁揚ジャッキ19の載荷重のそれぞれ半分に設定してある。
【0017】
次に、上記構成とした連続送り出し装置を用いて橋桁1を架設地点まで送り出す具体的な手順を図2(イ)(ロ)(ハ)(ニ)(ホ)(ヘ)を参照して説明する。
【0018】
先ず、図2(イ)に示す如く、橋脚等の固定構造物23上に装置全体を設置し、予め、中央及び左右の桁揚ジャッキ19,20,21を後端側ストロークエンドに位置させ、且つ左右の桁揚ジャッキ20,21を収縮させ、中央の桁揚ジャッキ19を伸長させた状態において、中央の桁揚ジャッキ19上に、橋桁1を載置させるようにする。
【0019】
上記の状態において、図2(ロ)に示す如く、中央の水平ジャッキ8を駆動して、中央の桁揚ジャッキ19を送り出し方向(矢印X)へ前進移動させることにより、橋桁1を1ストローク分だけ水平に送り出すようにする。中央の桁揚ジャッキ19が送り出し方向の前進側ストロークエンドに達すると、次に、図2(ハ)に示す如く、待機させておいた左右の桁揚ジャッキ20,21を伸長させ、上端間に掛け渡してあるビーム架台22を介して左右の桁揚ジャッキ20,21に橋桁1の荷重を移し、更に、伸長させておいた中央の桁揚ジャッキ19を収縮させるようにする。
【0020】
しかる後、図2(ニ)に示す如く、中央の水平ジャッキ8の駆動で中央の桁揚ジャッキ19を後退させると共に、左右の水平ジャッキ9,10の駆動で左右の桁揚ジャッキ20,21を前進させるようにし、この左右の桁揚ジャッキ20,21の前進工程により、橋桁1を更に1ストローク分だけ水平に送り出すようにする。左右の桁揚ジャッキ20,21が前進側ストロークエンドに達すると、続いて、図2(ホ)に示す如く、既に後退側ストロークエンドに戻されている中央の桁揚ジャッキ19を伸長させると共に、左右の桁揚ジャッキ20,21を収縮させることにより、橋桁1の荷重を中央の桁揚ジャッキ19に受けさせるようにする。
【0021】
次いで、中央の桁揚ジャッキ19を前進させて、橋桁1を更に1ストローク分だけ送り出すようにさせるが、この際、中央の桁揚ジャッキ19の前進工程と左右の桁揚ジャッキ20,21の後退工程とが交差するときに、すなわち、前進する中央の桁揚ジャッキ19と後退する左右の桁揚ジャッキ20,21とがすれ違うときに、図2(ヘ)に示す如く、左右の桁揚ジャッキ20,21の上端間に掛け渡してあるビーム架台22を、中央の桁揚ジャッキ19の前進移動の邪魔にならないように一旦撤去し、左右の桁揚ジャッキ20,21が後退側ストロークエンド位置に達するまでの間に、当該位置へ移動させて再び左右の桁揚ジャッキ20,21の上端間に掛け渡すようにする。しかる後、図2(ハ)に示す如く、橋桁1の荷重を左右の桁揚ジャッキ20,21に受けさせるようにし、以後、同様な工程を所要回繰り返すようにすることによって、橋桁1を架設地点まで送り出すようにする。
【0022】
なお、本発明の連続送り出し装置で橋桁1を受けている個所以外の長手方向所要個所は、橋桁1の送り出し量に応じて、別の送り出し装置や補助台車等によって適宜支持させるようにする。
【0023】
上記において、中央の桁揚ジャッキ19と左右の桁揚ジャッキ20,21を交互に前進、後退させるようにするので、橋桁1を連続的に送り出すことができ、効率よく作業を行うことができる。この際、上記桁揚ジャッキ19,20,21を移動させる水平ジャッキ8,9,10は並列に配置してあって、従来装置と比して全長が長くならないので、橋脚の天端面の如きスペース的に制約を受ける場所であっても支障なく使用することができる。又、中央の桁揚ジャッキ19から左右の桁揚ジャッキ20,21への橋桁1の受け渡しには、左右方向に延びるビーム架台22が用いられることから、橋桁1の支持点を左右にずらすことなく常に一定にすることができ、これにより、橋桁1を安定して送り出すことができる。更に、左右の桁揚ジャッキ20,21の載荷重は中央の桁揚ジャッキ19の載荷重の半分に設定してあるため、無駄のない合理的な設計とすることができる。
【0024】
次に、図3(イ)(ロ)はいずれも本発明の他の実施の形態を示すもので、前進する中央の桁揚ジャッキ19と後退する左右の桁揚ジャッキ20,21とのすれ違いを容易に行えるようにしたものである。すなわち、上記実施の形態と同様な構成において、図3(イ)は、左右の桁揚ジャッキ20,21の上端間に掛け渡したビーム架台22を、左右いずれか一方の桁揚ジャッキ20又は21の上端面部に、旋回フレーム23を介して水平方向へ回動可能とした場合を、又、図3(ロ)は、上記ビーム架台22を、左右いずれか一方の桁揚ジャッキ20又は21の上端面部に取り付けたスライド受部材25に、水平方向へスライド可能に係合支持させたものである。図3(イ)において、24はカウンタウエイトを示す。
【0025】
図3(イ)に示すようにすると、一方の桁揚ジャッキ20又は21の部分でビーム架台22を水平方向へ回動変位させることができ、又、図3(ロ)に示すようにすると、一方の桁揚ジャッキ20又は21の部分でビーム架台22を水平方向へスライド変位させることができるので、図2(ヘ)に示すように、前進する中央の桁揚ジャッキ19と後退する左右の桁揚ジャッキ20,21とがすれ違うときに、ビーム架台22を上記の如く変位させることによって、ビーム架台22をその都度撤去する必要性をなくすことができる。したがって、より効率的に作業を進めることができる。
【0026】
なお、上記実施の形態では、桁揚ジャッキ19,20,21の前進、後退移動をノンフリクションプレート6に設けたガイド溝3,4,5によってガイドさせるようにした場合を示したが、これらガイド溝3,4,5に代えて、ガイドロッドを、桁揚ジャッキ19,20,21の基台部19a,20a,21aに、相対的に移動できるように貫通配置してもよいこと、その他本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【0027】
【発明の効果】
以上述べた如く、本発明の橋桁連続送り出し装置によれば、次の如き優れた効果を発揮する。
(1) 橋桁を送り出す方向に延びるベースフレームの幅方向中央位置に、水平ジャッキの駆動でベースフレームの長手方向へ向けて所定の移動ストロークが得られるように桁揚ジャッキを鉛直に組み付け、且つ上記ベースフレーム上の中央の桁揚ジャッキを幅方向で挟む左右位置に、水平ジャッキの駆動でベースフレームの長手方向へ向けて所定の移動ストロークが得られるように桁揚ジャッキを鉛直に組み付け、更に、該左右の桁揚ジャッキの上端間に、橋桁を受けるためのビーム架台を着脱可能に掛け渡した構成としてあるので、中央の水平ジャッキによる中央の桁揚ジャッキの前進後退移動と左右の水平ジャッキによる左右の桁揚ジャッキの前進後退移動とを交互に行わせ、且つ橋桁を中央の桁揚ジャッキと左右の桁揚ジャッキ上のビーム架台との間で橋桁の受け渡しを行わせるようにすることにより、橋桁を水平方向へ連続的に送り出すことができ、そのため、橋梁の架設工事に要する期間を大幅に短縮することができる。したがって、鉄道、国道上等の送り出し期間の限定された区間及び長支間の橋梁送り出し架設工事に適用して極めて有利となる。
(2) 中央の水平ジャッキと左右の水平ジャッキを幅方向に並列配置したことから、装置全長を長大化することなくコンパクトな構造とすることができ、橋脚天端面等のスペース的に制約を受ける場所であっても支障なく設置することができる。
(3) 左右の桁揚ジャッキの前進移動で送り出すときの橋桁を、左右の桁揚ジャッキの上端間に掛け渡したビーム架台で受けられるようにしてあることから、左右の桁揚ジャッキと中央の桁揚ジャッキとの間で橋桁を受け渡しても、橋桁を常に一定の位置で安定支持することができる。
(4) 左右の桁揚ジャッキの上端間にビーム架台を着脱可能に掛け渡すことに代えて、左右いずれか一方の桁揚ジャッキの上端面部に、ビーム架台を水平方向へ回動可能又はスライド可能に保持させた構成とすることにより、中央の桁揚ジャッキの前進時と左右の桁揚ジャッキの後退時に、ビーム架台を水平方向へ変位させることができるので、上記前進、後退時のすれ違いに支障を来すことがなく、能率よく作業を進めることができる。
(5) 左右の桁揚ジャッキの載荷重を、中央の桁揚ジャッキの載荷重のそれぞれ半分に設定した構成とすることにより、合理的な設計とすることができる。
【図面の簡単な説明】
【図1】本発明の橋桁連続送り出し装置の実施の一形態を示すもので、(イ)は概略側面図、(ロ)は平面図、(ハ)は(イ)のA−A方向矢視図である。
【図2】橋桁を水平方向へ送り出す手順を示すもので、(イ)(ロ)(ハ)(ニ)(ホ)(ヘ)はそれぞれ異なる状態を示す概略図である。
【図3】本発明の他の実施の形態を示すもので、(イ)はビーム架台を回動方式とした状態を、又、(ロ)はビーム架台をスライド方式とした状態を示す部分概略正面図である。
【図4】橋桁の架設工法の一例を示すもので、(イ)(ロ)(ハ)はいずれも作業工程を示す概略図である。
【符号の説明】
1 橋桁
2 ベースフレーム
8,9,10 水平ジャッキ
19,20,21 桁揚ジャッキ
22 ビーム架台
23 旋回フレーム
25 スライド受部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bridge girder continuous feeding device used for bridge construction work.
[0002]
[Prior art]
As one of the bridge construction methods, there is a construction method in which a bridge girder is assembled in advance to a required length other than the construction point, and then the bridge girder is horizontally sent to the construction point in the longitudinal direction for construction.
[0003]
When the outline of such a construction method is shown in FIGS. 4 (a), (b), and (c), first, as shown in FIG. 4 (a), a horizontal jack b installed at one end in the longitudinal direction on the base frame a, A lifting jack c assembled so that it can be moved along the longitudinal direction of the base frame a by driving the horizontal jack b, and the longitudinal direction of the base frame a other than the moving stroke (usually 1 m) of the lifting jack c In the state where the feeding device e composed of the temporary jack d installed on the end is installed on the fixed structure f such as the ground yard or the top end surface of the bridge pier and the temporary jack c is stored, the feeding direction The lifting jack c positioned at the backward stroke end of (arrow x) is extended, and the bridge g g assembled to the required length using a crane is placed on the lifting jack c. To do It should be noted that the other required portions in the longitudinal direction of the bridge girder g can be received by another delivery device or auxiliary cart according to the feed amount of the bridge girder g. h denotes a girder plate.
[0004]
In the above state, as shown in FIG. 4B, the horizontal jack b is driven to move the lifting jack c forward in the feeding direction, thereby feeding the bridge g in the feeding direction by a fixed stroke. Next, as shown in FIG. 4 (c), the temporary jack d is extended so that the load of the bridge girder g is received by the temporary jack d. During this time, the contracted lifting jack c is moved to the horizontal jack b. Return to the reverse stroke end position by driving.
[0005]
Thereafter, as shown in FIG. 4 (a), by extending the lifting jack c and contracting the temporary receiving jack d, the load of the bridge g is transferred to the lifting jack c again. By repeating the same process, the bridge girder g is sent out to the erection point, and the bridge girder g is lowered and installed at the erection point using the descent equipment.
[0006]
[Problems to be solved by the invention]
However, in the case of the above-described erection method in which the bridge girder g is sent out horizontally, if the bridge girder g is sent out by the stroke of the horizontal jack b, the carriage jack c is moved backward to return to the original position and then moved forward again. Since so-called refilling work is required, continuous feeding of the bridge girder g cannot be performed. Therefore, there is a problem that time loss is large and the work cannot be efficiently performed. .
[0007]
If two delivery devices e are installed in tandem (series) in the longitudinal direction and the two delivery devices e are operated alternately, continuous delivery is possible, but installation of the delivery device e is possible. There is a problem that the place of use is limited because the place is restricted in terms of space on the top end surface of the pier.
[0008]
Therefore, the present invention can be installed without hindrance even in places where space is restricted, such as the pier top end surface, and the bridge girder can be continuously sent out, so that the bridge construction work It is an object of the present invention to provide a bridge girder continuous feeding device that can significantly shorten the period required for the above.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a girder so that a predetermined movement stroke can be obtained in the longitudinal direction of the base frame by driving a horizontal jack at the center position in the width direction of the base frame extending in the direction of feeding out the bridge girder. Girder so that a predetermined movement stroke can be obtained in the longitudinal direction of the base frame by driving the horizontal jack at the left and right positions where the lifting jack is assembled vertically and the center lifting jack on the base frame is sandwiched in the width direction. A lifting jack is assembled vertically, and a beam stand for receiving a bridge girder is detachably suspended between the upper ends of the left and right lifting jacks.
[0010]
Since each jack is arrange | positioned in parallel and the full length is restrained, it can become difficult to receive the space restrictions of an installation place. When sending out the bridge girder, the central lifting jack is moved forward and backward alternately by the horizontal horizontal jack and the left and right horizontal lifting jacks are moved forward and backward alternately. The bridge girder is sent out continuously by passing the bridge girder between the beam stands on the right and left lifting jacks.
[0011]
Also, instead of detachably hanging the beam platform between the upper ends of the left and right lifting jacks, the beam platform can be horizontally rotated or slidable on the upper end surface of either the left or right lifting jacks. With this configuration, the beam platform can be rotated so that it does not interfere with the central lifting jack when the forward process of the central lifting jack intersects the backward movement process of the left and right lifting jacks. Since it can be moved or slid, the work can be carried out more efficiently.
[0012]
In addition, by adopting a configuration in which the loading load of the left and right lifting jacks is set to half of the loading load of the central lifting jack, the left and right lifting jacks can be rationalized without using unnecessarily large ones. Design.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 (a), (b), and (c) show an embodiment of the present invention. On a base frame 2 that extends in a direction in which a bridge girder 1 is fed out (arrow X direction), a central portion in the width direction and left and right portions. A non-friction plate 6 provided with guide grooves 3 and 4 and 5 extending in the longitudinal direction is fixed to the end plate 7a and 7b, and end plates 7a and 7b are attached to positions slightly inside the longitudinal end portions of the central guide groove 3. The ball screw 11 is rotatably supported between the end plates 7a and 7b, and a feed motor 16 is connected to one end of the ball screw 11 to form a central horizontal jack 8. End plates 12a, 12b and 13a, 13b are attached to both ends in the longitudinal direction of the left and right guide grooves 4 and 5, respectively, and a ball screw 14 between the end plates 12a, 12b and 13a, 13b. 5 was rotatably supported, respectively, and to one end of the ball screw 14 and 15, and connected to and installed the feed motor 17 and 18 constitute a horizontal jack 9 and 10 of the left and right.
[0015]
Further, a base portion 19a of a lifting jack 19 arranged vertically upward is inserted and disposed in the central guide groove 3, and the ball screw 11 of the horizontal jack 8 is threaded through the base portion 19a. In this way, the carry jack 19 is moved in the longitudinal direction while being guided by the guide groove 3 by driving the horizontal jack 8, and the girder arranged vertically upward in the left and right guide grooves 4, 5. The horizontal jacks are configured such that the base portions 20a and 21a of the lifting jacks 20 and 21 are fitted and arranged, and the ball screws 14 and 15 of the horizontal jacks 9 and 10 are respectively threaded through the base portions 20a and 21a. 9, 10 so that the lifting jacks 20, 21 are simultaneously moved in the longitudinal direction while being guided by the guide grooves 4, 5, and further, the left and right lifting jacks are further moved. 20, 21 between the upper end of, to bridge detachably beam frame 22 to the receive bridge girder 1 at the central portion.
[0016]
In addition, the moving stroke of each lifting jack 19, 20, 21 is, for example, at least 1 m. Further, the loading load of the left and right lifting jacks 20 and 21 is set to be half of the loading load of the center lifting jack 19.
[0017]
Next, a specific procedure for sending the bridge girder 1 to the erection point using the continuous delivery device having the above configuration will be described with reference to FIGS. 2 (a), (b), (c), (d), (e), and (f). To do.
[0018]
First, as shown in FIG. 2 (a), the entire apparatus is installed on a fixed structure 23 such as a pier, and the center and left and right lifting jacks 19, 20, and 21 are positioned at the rear end side stroke end in advance. In addition, the bridge girders 1 are placed on the central lifting jack 19 in a state where the left and right lifting jacks 20 and 21 are contracted and the central lifting jack 19 is extended.
[0019]
In the above state, as shown in FIG. 2 (b), the central horizontal jack 8 is driven to move the central lifting jack 19 forward in the feeding direction (arrow X), thereby moving the bridge girder 1 by one stroke. Just send it out horizontally. When the center lifting jack 19 reaches the forward stroke end in the feeding direction, next, the left and right lifting jacks 20 and 21 that have been waiting are extended as shown in FIG. The load of the bridge girder 1 is transferred to the left and right girder jacks 20 and 21 via the beam platform 22 that is stretched, and the central girder jack 19 that has been stretched is contracted.
[0020]
Thereafter, as shown in FIG. 2 (d), the central lifting jack 19 is moved backward by driving the central horizontal jack 8, and the left and right lifting jacks 20, 21 are driven by driving the left and right horizontal jacks 9, 10. The bridge girder 1 is further sent out horizontally by one stroke by the advancing process of the left and right lifting jacks 20 and 21. When the left and right lifting jacks 20, 21 reach the forward stroke end, subsequently, as shown in FIG. 2 (e), the central lifting jack 19 already returned to the backward stroke end is extended, By contracting the left and right lifting jacks 20, 21, the load of the bridge beam 1 is received by the central lifting jack 19.
[0021]
Next, the central lifting jack 19 is moved forward so that the bridge beam 1 is further sent out by one stroke. At this time, the forward movement process of the central lifting jack 19 and the backward movement of the left and right lifting jacks 20 and 21 are performed. As shown in FIG. 2 (f), when the process intersects, that is, when the forward center lifting jack 19 and the backward left and right lifting jacks 20, 21 pass each other, as shown in FIG. , 21 is temporarily removed so as not to obstruct the forward movement of the central lifting jack 19 so that the left and right lifting jacks 20, 21 reach the backward stroke end position. In the meantime, it moves to the said position and it spans between the upper ends of the left and right lifting jacks 20 and 21 again. After that, as shown in FIG. 2 (c), the bridge girder 1 is installed by allowing the left and right lifting jacks 20, 21 to receive the load of the bridge girder 1 and repeating the same process as necessary thereafter. Send to the point.
[0022]
It should be noted that the longitudinal required portions other than the portion receiving the bridge girder 1 in the continuous delivery device of the present invention are appropriately supported by another delivery device, an auxiliary carriage or the like according to the delivery amount of the bridge girder 1.
[0023]
In the above, since the center lifting jack 19 and the left and right lifting jacks 20 and 21 are alternately advanced and retracted, the bridge girder 1 can be continuously sent out and work can be performed efficiently. At this time, the horizontal jacks 8, 9, and 10 for moving the lifting jacks 19, 20, and 21 are arranged in parallel, and the overall length is not longer than that of the conventional device. Can be used without hindrance even in places that are subject to restrictions. Moreover, since the beam stand 22 extended in the left-right direction is used for the transfer of the bridge girder 1 from the center lifting jack 19 to the left and right lifting jacks 20, 21, the support point of the bridge girder 1 is not shifted left and right. It can always be kept constant, whereby the bridge girder 1 can be sent out stably. Furthermore, since the loading load of the left and right lifting jacks 20 and 21 is set to half of the loading load of the center lifting jack 19, a rational design without waste can be achieved.
[0024]
Next, FIGS. 3 (a) and 3 (b) show other embodiments of the present invention. The difference between the forward center lifting jack 19 and the rearward left and right lifting jacks 20, 21 is shown in FIG. It can be easily done. That is, in the same configuration as that of the above-described embodiment, FIG. 3A shows that the beam mount 22 spanned between the upper ends of the left and right lifting jacks 20 and 21 is either the left or right lifting jack 20 or 21. 3 (b), the beam base 22 is connected to the upper end of one of the left and right carry jacks 20 or 21. The slide receiving member 25 attached to the surface portion is engaged and supported so as to be slidable in the horizontal direction. In FIG. 3A, reference numeral 24 denotes a counterweight.
[0025]
As shown in FIG. 3 (a), the beam pedestal 22 can be rotated and displaced in the horizontal direction at one lifting jack 20 or 21, and as shown in FIG. 3 (b), Since the beam mount 22 can be slid in the horizontal direction at one of the lifting jacks 20 or 21, as shown in FIG. 2 (f), the central lifting jack 19 that moves forward and the left and right beams that move backward. By displacing the beam mount 22 as described above when the lifting jacks 20 and 21 pass each other, it is possible to eliminate the need to remove the beam mount 22 each time. Therefore, it is possible to work more efficiently.
[0026]
In the above-described embodiment, the forward and backward movements of the lifting jacks 19, 20, 21 are guided by the guide grooves 3, 4, 5 provided in the non-friction plate 6. Instead of the grooves 3, 4, 5, guide rods may be disposed so as to be able to move relative to the base portions 19 a, 20 a, 21 a of the lifting jacks 19, 20, 21, etc. Of course, various modifications can be made without departing from the scope of the invention.
[0027]
【The invention's effect】
As described above, the bridge girder continuous delivery device of the present invention exhibits the following excellent effects.
(1) At the center position in the width direction of the base frame extending in the direction of feeding out the bridge girder, the lifting jack is assembled vertically so that a predetermined movement stroke can be obtained in the longitudinal direction of the base frame by driving the horizontal jack, and the above At the left and right positions sandwiching the center lifting jack on the base frame in the width direction, the lifting jack is assembled vertically so that a predetermined movement stroke can be obtained in the longitudinal direction of the base frame by driving the horizontal jack. Since the beam platform for receiving the bridge girder is detachably spanned between the upper ends of the left and right lifting jacks, the central lifting jack moves forward and backward with the central horizontal jack and the left and right horizontal jacks. The left and right lifting jacks are alternately moved forward and backward, and the bridge girder is a beam on the center lifting jack and the left and right lifting jacks. By allowing the bridge girder to be transferred to and from the gantry, the bridge girder can be continuously sent out in the horizontal direction, so that the time required for the bridge construction work can be greatly shortened. Therefore, the present invention is extremely advantageous when applied to a bridge delivery construction work between a section with a limited delivery period such as a railway or a national highway, and a long support.
(2) Since the central horizontal jack and the left and right horizontal jacks are arranged side by side in the width direction, it can be made compact without increasing the overall length of the device, and space constraints such as the pier top end face are restricted. It can be installed without hindrance even at a place.
(3) Since the bridge girder when the left and right lifting jacks are fed forward can be received by the beam mount spanned between the upper ends of the left and right lifting jacks, Even if the bridge girder is handed over to the lifting jack, the bridge girder can always be stably supported at a fixed position.
(4) Instead of detachably hanging the beam platform between the upper ends of the left and right lifting jacks, the beam platform can be rotated or slid horizontally on the upper end surface of either the left or right lifting jacks. With this configuration, the beam platform can be displaced in the horizontal direction when the central lifting jack moves forward and when the left and right lifting jacks move backward. Can work efficiently.
(5) A rational design can be achieved by adopting a configuration in which the loading load of the left and right lifting jacks is set to half the loading load of the central lifting jack.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows an embodiment of a bridge girder continuous delivery device of the present invention, in which (A) is a schematic side view, (B) is a plan view, and (C) is a view in the direction of arrows A-A FIG.
FIG. 2 shows a procedure for sending out a bridge girder in the horizontal direction, and (a), (b), (c), (d), (e), and (f) are schematic views showing different states.
FIGS. 3A and 3B show another embodiment of the present invention. FIG. 3A is a partial schematic view showing a state in which the beam mount is a rotation type, and FIG. It is a front view.
FIGS. 4A and 4B show an example of a bridge girder construction method, in which (a), (b), and (c) are schematic diagrams showing work steps.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bridge girder 2 Base frame 8, 9, 10 Horizontal jack 19, 20, 21 Girder jack 22 Beam mount 23 Turning frame 25 Slide receiving member

Claims (3)

橋桁を送り出す方向に延びるベースフレームの幅方向中央位置に、水平ジャッキの駆動でベースフレームの長手方向へ向けて所定の移動ストロークが得られるように桁揚ジャッキを鉛直に組み付け、且つ上記ベースフレーム上の中央の桁揚ジャッキを幅方向で挟む左右位置に、水平ジャッキの駆動でベースフレームの長手方向へ向けて所定の移動ストロークが得られるように桁揚ジャッキを鉛直に組み付け、更に、該左右の桁揚ジャッキの上端間に、橋桁を受けるためのビーム架台を着脱可能に掛け渡した構成を有することを特徴とする橋桁連続送り出し装置。A lifting jack is vertically assembled at the center position in the width direction of the base frame extending in the direction of feeding out the bridge girder so that a predetermined moving stroke can be obtained in the longitudinal direction of the base frame by driving the horizontal jack, and on the base frame At the left and right positions sandwiching the central lifting jack in the width direction, the lifting jack is assembled vertically so that a predetermined movement stroke can be obtained in the longitudinal direction of the base frame by driving the horizontal jack. A bridge girder continuous feeding device characterized by having a structure in which a beam base for receiving a bridge girder is detachably suspended between upper ends of the lifting jacks. 左右の桁揚ジャッキの上端間にビーム架台を着脱可能に掛け渡すことに代えて、左右いずれか一方の桁揚ジャッキの上端面部に、ビーム架台を水平方向へ回動可能又はスライド可能に保持させた請求項1記載の橋桁連続送り出し装置。Instead of detachably hanging the beam platform between the upper ends of the left and right lifting jacks, hold the beam platform horizontally or slidably on the upper end surface of either the left or right lifting jacks. The bridge girder continuous feeding device according to claim 1. 左右の桁揚ジャッキの載荷重を、中央の桁揚ジャッキの載荷重のそれぞれ半分に設定した請求項1又は2記載の橋桁連続送り出し装置。The bridge girder continuous feeding device according to claim 1 or 2, wherein the loading load of the left and right lifting jacks is set to half of the loading load of the central lifting jack.
JP36330797A 1997-12-16 1997-12-16 Bridge girder continuous feeding device Expired - Fee Related JP3837888B2 (en)

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JP4508073B2 (en) * 2005-10-19 2010-07-21 山九株式会社 Method and system for transporting and loading heavy objects
CN102704398B (en) * 2012-04-01 2014-04-02 上海城建市政工程(集团)有限公司 Jacking construction method of capping beam
CN103205934A (en) * 2013-04-03 2013-07-17 同济大学 Active supporting walking type pushing construction deivce
CN103397603B (en) * 2013-04-28 2015-04-08 李勇 Bridge magnetic levitation pushing system and two-stage cantilever manufacturing method
CN108708294B (en) * 2018-07-11 2023-12-12 中铁大桥局集团第六工程有限公司 Short slideway beam for pushing construction of unequal-section truss beam and pushing method
CN110306445A (en) * 2019-07-11 2019-10-08 中国建筑第八工程局有限公司 Incremental launching device and bridge incremental launching method for bridge incremental launching construction
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