JP3940587B2

JP3940587B2 - Construction method of divided bridge type traffic route

Info

Publication number: JP3940587B2
Application number: JP2001347907A
Authority: JP
Inventors: 信明小林; 誠慎伊丹; 直小原; 泰夫西田; 弘太郎小林
Original assignee: Taisei Corp
Current assignee: Taisei Corp
Priority date: 2001-11-13
Filing date: 2001-11-13
Publication date: 2007-07-04
Anticipated expiration: 2021-11-13
Also published as: JP2003147705A

Description

【０００１】
【発明の属する技術分野】
本発明は、分割橋体式交通路の構築方法に関する。
【０００２】
【従来の技術】
従来、交通路の交差点における渋滞を解消するために、交差点を立体化させる施工では、交通路の直上に立体交差橋梁を構築する際に、作業区間となる交通路の通行が大規模に規制され、恒常的な渋滞が発生していた。
【０００３】
従来の立体交差橋梁は、以下の方法によって構築されていた。
（１）フーチングを支持する基礎杭を打設する杭打設工程。
（２）交通路の周辺若しくは交通路上を掘削して打設後の杭頭を処理し、フーチングを設置するための溝を掘削する掘削工程。
（３）溝に型枠を配置し、この型枠内に鉄筋を配筋してコンクリートを打設するコンクリート打設工程。
（４）打設したコンクリートを養生して硬化させることで、基礎杭を備えたフーチングを形成し、このフーチングに立体交差橋梁の橋脚を立設する橋脚立設工程。
（５）フーチングに立設した立体交差橋梁の橋脚に桁及び床版を架設し、立体交差橋梁を完成させる橋梁架設工程。
【０００４】
【発明が解決しようとする課題】
しかしながら、前記従来の立体交差橋梁の構築では、以下の問題が存在していた。
（１）杭打設工程及び（２）掘削工程では、騒音及び振動が大きく発生し、広範囲に伝わるため、特に、夜間作業では近隣住民に対する影響が大きくなり、一日の作業時間が限定されるため、施工期間が長期化し、交通路の交通規制が長期化していた。また、道路の下方となる地中に水道管や電線等の埋設物が存在する場合には、これらの埋設物と基礎杭との干渉を防止する必要があり、施工作業が煩雑となることから、施工期間が長期化していた。
【０００５】
（１）杭打設工程及び（３）コンクリート打設工程では、基礎杭、型枠及び鉄筋を施工現場に搬入して保管する必要があり、保管用地を道路の周辺若しくは道路上に設けるため、既存の交通路における車両の通行に多大な影響を与えていた。
【０００６】
（３）コンクリート打設工程及び（４）橋脚立設工程では、フーチングを形成するコンクリートの打設及び養生を雨天時に行うことは困難であり、天候によって作業進行が妨げられるため、施工期間が長期化していた。さらに、コンクリートの養生においては、乾燥によってコンクリートに発生するひび割れを防ぐため、露出面をむしろ、布で覆い、水をまいて湿潤状態を保たせる必要があることから、現場での作業が煩雑であった。また、コンクリートの養生期間は施工作業が中断されるため、施工期間が長期化していた。
【０００７】
したがって、従来の立体交差橋梁の構築では、既存の交通路における車両の通行を大幅に規制する必要があるとともに、施工期間が長期化するため、迂回路を交通路の周辺に設ける必要があり、周辺地域社会の環境及び経済活動に対する影響が大きくなることから、施工実施が困難となり、都市整備が大幅に遅れる原因となっていた。
【０００８】
そこで、本発明は、前記問題を解決するためになされたものであり、既存の交通路の上方に交通路を構築する場合において、短期間に車両の通行を確保するため、既存の交通に与える影響を大幅に低減する分割橋体式交通路の構築方法を提供することを課題とする。
【０００９】
【課題を解決するための手段】
本発明は、前記課題を解決すべく構成されるものであり、請求項１に記載の発明は、分割橋体式交通路の構築方法であって、（１）既存の交通路の上方に配置された水平部材と、水平部材に沿って、既存の交通路の延長方向に移動可能な揚重手段と、水平部材を所定の高さに支持し、既存の交通路の延長方向に移動可能な走行台車とから構成される移動式クレーンを既存の交通路上に設置する移動式クレーン設置工程と、（２）移動式クレーンの揚重手段によって支持部材を吊り上げて搬送し、既存の交通路上に設置された底版に立設する支持部材設置工程と、（３）移動式クレーンの揚重手段によって頂版を吊り上げて搬送し、支持部材に支持させることで分割橋体を構築する頂版設置工程と、（４）支持部材設置工程及び頂版設置工程を繰り返して既存の交通路上に分割橋体を連続して設置し、各分割橋体の頂版の上面に交通路を設けることで分割橋体式交通路を構築する分割橋体式交通路構築工程とを含むことを特徴とする。
【００１０】
ここで、交通路とは、道路、鉄道線路等の各種交通機関及び歩道等の通行路をいう。
また、分割橋体を構成する各部材の材料は、コンクリートや鋼材など限定されるものではなく、さらに、形状も限定されるものではないが、本発明では、分割橋体の上面に交通路を設けることから、車両等の荷重に十分に耐えられる材料及び形状である必要がある。また、形成精度の高いプレキャスト部材を用いることが好ましい。
【００１５】
ここで、移動式クレーンの揚重手段は、吊具を有するワイヤを巻き上げるウィンチや、既存のホイストを用いたものなど、その構成は限定されるものではなく、揚重手段を既存の交通路の幅員方向に移動可能とし、分割橋体の各部材を設置位置の上方まで搬送した後に、分割橋体の各部材の位置を微調整することができるようにしてもよい。
また、走行台車を移動させるための走行手段は、キャタピラ（登録商標）やタイヤなど、その構造は限定されるものではなく、さらに、駆動方式も電動や内燃機関など、限定されるものではなく、非駆動式の走行手段と組み合わせて構成してもよい。
【００１６】
この発明によれば、分割橋体の各部材を既存の交通路上に設けた作業用地内で搬送する際に、移動式クレーンの水平部材を作業用地の上方に配置することで、分割橋体の各部材を搬送する揚重手段が作業用地の上方を既存の交通路の延長方向に移動するため、狭い作業用地であっても、分割橋体の各部材を作業用地の側方の用地を通過させることなく、分割橋体式交通路を短期間に構築することができる。
また、移動式クレーンは走行台車によって移動可能であるため、容易に移動して搬送作業を行うことができる。これは、連続して設置された分割橋体に新たに分割橋体を連続させて設置することで延長させる場合に有効であるとともに、移動式クレーンの設置作業を簡易化することができる。
【００１７】
また、請求項２に記載の発明は、請求項１に記載の分割橋体式交通路の構築方法であって、移動式クレーンは、既存の交通路の延長方向に移動可能な昇降台車を備え、頂版設置工程において、頂版を昇降台車に設置し、昇降台車によって頂版を昇降移動させることで、支持部材に頂版を支持させることを特徴とする。
【００１８】
この発明によれば、水平部材に設置された揚重手段による頂版の吊り上げ高さが頂版の設置高さよりも低く、揚重手段によって設置高さまで頂版を上昇させることができない場合であっても、昇降台車の昇降手段によって頂版を上昇させることで、頂版を設置高さまで搬送して支持部材に設置することができるため、水平部材の高さ位置を低くすることで小型化及び軽量化された移動式クレーンを用いて分割橋体式交通路を構築することができる。
【００１９】
また、請求項３に記載の発明は、請求項２に記載の分割橋体式交通路の構築方法であって、昇降台車は、頂版を垂直軸周りに回転させる回転手段を備え、頂版設置工程において、回転手段によって頂版を垂直軸周りに回転させ、頂版の向きを調整することを特徴とする。
【００２０】
この発明によれば、頂版の長手方向を作業用地の延長方向と平行にして搬送した後に、容易に向きを調整して設置することができるため、作業用地が狭い場合であっても、頂版の設置作業を簡易化することができる。
【００２１】
また、請求項４に記載の発明は、請求項１乃至請求項３のいずれか１項に記載の分割橋体式交通路の構築方法であって、分割橋体式交通路構築工程において、分割橋体同士を緊張材又は締結材によって一体化することを特徴とする。
【００２２】
ここで、緊張材による分割橋体同士の一体化とは、隣接する複数の分割橋体の各部材を貫通したＰＣ鋼線やＰＣ鋼棒等のＰＣ鋼材である緊張材の両端を分割橋体に定着させ、この緊張材に緊張力を付加する、所謂ポストテンション方式による接合である。また、締結材による分割橋体同士の一体化とは、隣接する分割橋体同士にボルトを跨設し、ナットを締め込むことによって分割橋体同士を一体化させる接合である。
【００２３】
この発明によれば、緊張材又は締結材に緊張力を付加して分割橋体同士を一体化するため、短時間に分割橋体式交通路の強度及び安定性を高めることができる。
【００２４】
したがって、本発明では、既存の交通路の上方に分割橋体式交通路を短期間に構築し、作業区間における車両等の通行を早期に確保するため、交通路の周辺に迂回路を設けることなく、周辺地域社会の環境及び経済活動に対する影響を低減するとともに、施工期間を短縮し、施工費を削減することができる。
【００２５】
【発明の実施の形態】
以下、添付図面に基づき、本発明の好適な実施形態について詳細に説明する。なお、同一要素には同一符号を用い、重複する説明は省略するものとする。
【００２６】
本発明の実施形態に係る分割橋体式交通路の構築方法は、自動車の道路、列車の線路、若しくは歩道等の交通路に適用可能であるが、この実施形態では、自動車の道路における交差点を立体化する場合を例として説明する。
【００２７】
［分割橋体式交通路］
まず、本発明の実施形態に係る分割橋体式交通路の構築方法によって構築される分割橋体式交通路について説明する。
図１は本発明の実施形態に係る分割橋体式交通路を示した図で、（ａ）は分割橋体式交通路の側面図、（ｂ）は分割橋体式交通路の平面図である。
【００２８】
分割橋体式交通路Ａは、交通路の交差点における渋滞を解消するために、既存の交通路の上方に構築して交差点を立体化させる交通路であって、図１に示すように、一方の道路Ｋ１と他方の道路Ｋ２が直交している交差点における一方の道路Ｋ１に設置され、分割橋体Ｂが連続して設置されたものを交差点の中央を挟んで対峙させ、この間に橋梁Ｆを架設したものである。分割橋体Ｂ同士はＰＣ鋼線やＰＣ鋼棒等のＰＣ鋼材によるポストテンション方式や、ボルトジョイントによる接合等によって一体化されており、各々所定の高さに形成された各分割橋体Ｂによって分割橋体式交通路Ａの上面に設けられた道路Ｋ３が一方の道路Ｋ１と接続するように斜路を形成し、分割橋体式交通路Ａの道路Ｋ３によって道路Ｋ１の車両の通行を確保している。なお、符号Ｇは分割橋体式交通路Ａの道路Ｋ３と一方の道路Ｋ１とを接続させるための摺付部であり、符号Ｓ１，Ｓ２は分割橋体式交通路Ａの両脇に設けた側道である。さらに、符号Ｈは底版Ｃを安定して設置させるために敷設されたＨ形鋼である。
【００２９】
次に、分割橋体Ｂの構成について説明する。
分割橋体Ｂは、図１に示すように、長方形の部材である底版Ｃと、底版Ｃの上面における幅員方向の両端に立設された２枚の部材である支持部材Ｄと、２枚の支持部材Ｄの上端同士に架設された長方形の部材である頂版Ｅとから構成されたラーメン構造の函体である。この分割橋体Ｂの各部材は予め工場等で形成されたプレキャスト部材であり、ＰＣ鋼線やＰＣ鋼棒等のＰＣ鋼材によるポストテンション方式や、ボルトジョイントによる接合等によって一体化されている。したがって、分割橋体Ｂを施工現場に搬入する際には、各部材に分割して小型化及び軽量化した状態で搬入するため、分割橋体Ｂの搬入作業が簡易化されている。
【００３０】
［移動式クレーン］
次に、本発明の実施形態に係る分割橋体式交通路の構築方法に用いられる移動式クレーンについて説明する。
図２は本発明の実施形態に係る移動式クレーンを示した側面図である。図３は本発明の実施形態に係る移動式クレーンを示した背面図である。
【００３１】
まず、移動式クレーンの構成について説明する。なお、以下の説明において、前方とは、図２に示す移動式クレーンのトラック側であり、後方とは、図２に示す移動式クレーンの分割橋体側であり、左右方向とは、図３に示す移動式クレーンの幅方向である。
移動式クレーン１は、図２及び図３に示すように、延長方向が分割橋体式交通路Ａの橋軸方向と平行に配置された平面視において長方形の部材である水平ジブ２（水平部材）と、水平ジブ２の下面に設けられ、水平ジブ２に沿って前後方向に移動可能であるとともに、水平ジブ２の左右方向の範囲内において、左右方向に移動可能な揚重手段３と、水平ジブ２を所定の高さに支持し、底版Ｃ上を移動可能な走行台車４と、走行台車４内を前後方向に移動可能な昇降台車５とから構成され、揚重手段３は分割橋体Ｂの各部材を吊り上げて搬送可能である。
【００３２】
次に、移動式クレーン１の各構成要素について説明する。
水平ジブ２は、図２及び図３に示すように、所定の高さに配置され、下面に前後方向に延長された２本の前後レール２０が付設されており、この水平ジブ２の左右方向の幅は底版Ｃの幅員よりも小さく形成されている。
【００３３】
揚重手段３は、図２及び図３に示すように、水平ジブ２の下面に付設された２本の前後レール２０に吊り下げられており、前後レール２０に沿って前後方向に移動するローラ部３０と、ローラ部３０の下部に左右方向に延長された状態で付設され、左右方向に伸縮可能な伸縮レール３１と、伸縮レール３１に吊り下げられたホイスト３２とから構成され、分割橋体Ｂの各部材を吊り上げて搬送するものである。
伸縮レール３１は、ローラ部３０の下部に固定された固定レール３３と、固定レール３３に沿って左右方向に摺動するとともに、ホイスト３２が吊り下げられている可動レール３４とから構成され、固定レール３３の左右方向の長さは、後記する走行台車４に立設されている左右の脚部４０，４０の間隔よりも短く、さらに、可動レール３４の左右方向の長さは、固定レール３３の左右方向の長さよりも短い。したがって、可動レール３４が固定レール３３の中央に配置された場合には、図３に示すように、固定レール３３、可動レール３４及びホイスト３２が左右の脚部４０，４０の間隔内に収まるようになっている。
ホイスト３２は、分割橋体Ｂの各部材を吊り上げるための吊具３５を有し、吊具３５に連結したワイヤ３６を巻き上げることによって各部材を吊り上げるものであり、可動レール３４に沿って左右方向に移動可能である。
【００３４】
走行台車４は、図２及び図３に示すように、水平ジブ２の下面における左右方向の両端に設置され、水平ジブ２を支持している左右の脚部４０，４０と、脚部４０，４０が立設し、長手方向が水平ジブ２の延長方向と平行に配置された左右のレール部材４１，４１と、各レール部材４１，４１の下面に設置された走行手段４２とから構成され、左右のレール部材４１，４１は断面コの字形状であって溝部４３を有し、各溝部４３の開放部が内側方向で対峙するように配置され、対峙した左右のレール部材４１，４１の左右方向の幅は水平ジブ２の左右方向の幅と同一になっている。
【００３５】
走行手段４２は、移動式クレーン１を移動させるものであり、図２及び図３に示すように、水平ジブ２の略前端部の下方に配置された非駆動式のタイヤである前方走行手段４２ａと、水平ジブ２の略後端部の下方に配置された駆動式のキャタピラ（登録商標）である後方走行手段４２ｂとから構成され、前方走行手段４２ａ及び後方走行手段４２ｂは左右のレール部材４１，４１の下面に１組ずつ設置されており、後方走行手段４２ｂの駆動力によって移動式クレーン１を前後方向に移動させる。なお、走行手段４２の構成はこれに限定されるものではなく、前方走行手段４２ａを駆動式にしてもよい。さらに、駆動方式も電動や内燃機関など、限定されるものではない。
ここで、本実施形態では、後方走行手段４２ｂを底版Ｃ上に配置し、前方走行手段４２ａを底版Ｃの前方となる地面上に配置するため、前方走行手段４２ａとレール部材４１の間にブラケット４５を介在させ、レール部材４１が水平に配置されるように前方走行手段４２ａの高さ位置を調整している。
また、本実施形態では、前方走行手段４２ａ，４２ａ同士の間隔内に分割橋体Ｂの各部材を積載したトラックＴの荷台を配置するため、前方走行手段４２ａとレール部材４１の間に介在しているブラケット４５を左右方向に突出させることで、前方走行手段４２，４２ａ同士の間隔を大きくし、トラックＴの荷台を配置可能な間隔を確保している。
【００３６】
昇降台車５は、レール部材４１，４１に沿って走行台車４内を前後方向に移動するものであり、図２及び図３に示すように、平面視において長方形の部材である台座５０と、台座５０の四隅から左右方向に突出した４個のローラ５１と、台座５０の上面に設置された昇降支柱５２（昇降手段）と、昇降支柱５２の上端に設置され、垂直軸周りに回転する回転台５３（回転手段）とから構成され、伸縮支柱５２が上下方向に伸縮することによって回転台５３が昇降するものである。この昇降台車５は、各ローラ５１がレール部材４１の溝部４３内を移動することで、レール部材４１に沿って走行台車４内を前後方向に移動する。なお、本実施形態では、油圧を用いて昇降支柱５２を昇降させているが、ワイヤ式などでもよく、限定されるものではない。また、回転台５３の駆動方式も油圧式や電動式など限定されるものではない。
【００３７】
次に、移動式クレーン１の動作について説明する。
まず、移動式クレーン１は、図２及び図３に示すように、走行台車４の走行手段４２によって前後方向に移動可能である。
また、揚重手段３は、図３に示すように、可動レール３４及びホイスト３２を固定レール３３の中央に配置させた場合に、走行台車４の左右のレール部材４１，４１の間隔内に収まるため、左右の脚部４０，４０と干渉することなく、水平ジブ２の下面の中央を前後方向に移動する。さらに、揚重手段３は、伸縮レール３１の可動レール３４を左右方向に移動させることで、可動レール３４に吊り下げられているホイスト３２が底版Ｃの幅員方向における両端部まで移動する。
また、昇降台車５は、走行台車４内を前後方向に移動可能であり、回転台５３の上面に頂版Ｅを載置し、回転台５３を垂直軸周りに回転させて頂版Ｅの向きを変える。さらに、伸縮支柱５２を伸長させることで頂版Ｅを上昇させる。
【００３８】
［分割橋体式交通路の構築方法］
次に、本発明の実施形態に係る分割橋体式交通路の構築方法について説明する。
図４は本発明の実施形態に係る支持部材設置工程を示した図で、（ａ）は荷取り作業を示した断面図、（ｂ）は支持部材を設置する際を示した背面図である。図５は本発明の実施形態に係る頂版設置工程を示した側面図である。図６は本発明の実施形態に係る底版設置工程を示した断面図である。図７は本発明の実施形態に係る移動式クレーンの他の構成を示した図で、（ａ）は前後の走行手段が底版上に配置された構成の移動式クレーンを示した側面図、（ｂ）は昇降台車を備えない構成を示した側面図である。図８は本発明の実施形態に係る分割橋体式交通路の構築方法において、支持部材が底版の中央に立設された分割橋体を構築する際を示した図で、（ａ）は頂版設置工程を示した側面図、（ｂ）は頂版設置工程を示した背面図である。
【００３９】
（１）掘削溝設置工程
まず、分割橋体式交通路Ａを設置するための掘削溝を一方の交通路Ｋ１に設け、掘削溝の底面の両側部にＨ形鋼Ｈを掘削溝の延長方向に敷設し、ここに基礎コンクリートを打設する。この掘削作業は、夜間等の交通が停止する時間帯に道路を閉鎖又は規制して行われるが、掘削量が少ないことから短期間で施工が完了するため、既存の交通に対する影響が軽減されている。また、掘削溝の深さが浅いため、掘削溝の下方に水道管や電線等の埋設物が存在している場合であっても、これらの埋設物に影響されることがない。
【００４０】
（２）移動式クレーン設置工程
次に、掘削溝の両側に設けた側道Ｓ１，Ｓ２によって車両の通行を確保しながら、掘削溝内に数枚の底版Ｃを連続した状態で設置する。なお、数枚とは、設置された底版Ｃ上に移動式クレーン１の後方走行手段４２ｂを配置可能な最低限の枚数であり、小型のトラッククレーンによって設置可能な枚数であることから、側道Ｓ１，Ｓ２の車両の通行に影響を与えない。
次に、図２に示すように、移動式クレーン１を掘削溝内に設置する。このとき、連続して設置された底版Ｃ上に後方走行手段４２ｂを配置し、連続して設置された底版Ｃの前方となる地面上に敷設されたＨ形鋼の上面に前方走行手段４２ａを配置する。なお、移動式クレーン１は走行手段４２によって移動可能であるため、移動式クレーン１の設置位置を容易に調整することができる。
【００４１】
（３）支持部材設置工程
次に、図４（ａ）に示すように、前方走行手段４２ａ，４２ａ同士の間隔内に分割橋体Ｂの各部材を積載したトラックＴの荷台を配置する。
次に、移動式クレーン１の揚重手段３を水平ジブ２の前方に移動させて支持部材Ｄを吊り上げた後に、揚重手段３を水平ジブ２の後方に移動させることで、連続して設置した底版Ｃの最後部の上方に搬送する。そして、図４（ｂ）に示すように、ホイスト３２を底版Ｃの上方で左右方向に移動させ、支持部材Ｄを底版Ｃの幅員方向における両端に立設する。ここで、揚重手段３が水平ジブ２の前端部に移動して分割橋体Ｂの各部材を吊り上げた場合には、移動式クレーン１の前方部の荷重が増加するが、水平ジブ２の前端部の下方には、移動式クレーン１を支持している前方走行手段４２ａが配置されているため、移動式クレーン１の安定性が損なわれることがない。
【００４２】
（４）頂版設置工程
次に、揚重手段３を水平ジブ２の前方に移動させて頂版Ｅを吊り上げ、揚重手段３を水平ジブ２の後方に移動させることで頂版Ｅを搬送する。このとき、頂版Ｅの幅員は脚部４０，４０同士の間隔よりも大きいため、図２に示すように、頂版Ｅの幅員方向を水平ジブ２の延長方向と平行にしてから搬送する。この頂版Ｅは底版Ｃに立設した支持部材Ｄ，Ｄの上端同士の間に架設されるものであるが、本実施形態では、水平ジブ２の高さを低くして移動式クレーン１を小型化及び軽量化しているため、揚重手段３による頂版Ｅの吊り上げ高さが頂版Ｅの設置高さよりも低く、揚重手段３によって頂版Ｅを設置することができない。そのため、図５に示すように、揚重手段３によって頂版Ｅを昇降台車５の回転台５３の上面に載置し、昇降台車５を最後方の脚部４０，４０よりも後方に移動させてから、回転台５３によって頂版Ｅを垂直軸周りに回転させて向きを調整した後に、伸縮支柱５２を伸長させて頂版Ｅを支持部材Ｄの上端の高さまで上昇させ、走行台車４を後方に移動させることで支持部材Ｄ，Ｄの上端同士の間に架設する。
また、昇降台車５のローラ５１の上端部と走行台車のレール部材の溝部４３との間に隙間４４を設け、昇降台車５が上方に移動可能な構成とし、頂版Ｅを支持部材Ｄ，Ｄの上端同士の間に架設した後に、頂版Ｅと回転台５３を接合した状態で伸縮支柱５２を収縮して昇降台車５を上昇させ、昇降台車５が頂版Ｅに吊り下げられた状態にすることで、頂版Ｅに昇降台車５及びクレーン１本体の荷重が付加され、頂版Ｅが支持部材Ｄに押し付けられた状態となり、両者を確実に接合することができるため、施工精度を高めることができる。
【００４３】
次に、（３）支持部材設置工程及び（４）頂版設置工程を繰り返し、後方から順次に全ての底版Ｃに支持部材Ｄ及び頂版Ｅを設置し、掘削溝内に連続して分割橋体Ｂを設置する。この（３）支持部材設置工程及び（４）頂版設置工程の繰り返しにおいて、水平ジブ２の後方は底版Ｃの上方に配置され、支持部材Ｄ及び頂版Ｅの搬送距離が長く確保されるため、１個の分割橋体Ｂを構築する度に移動式クレーン１及びトラックＴの位置を移動させる必要がなく、作業が簡易化され、施工期間が短縮される。また、分割橋体Ｂの各部材は水平ジブ２の直下を通過するため、分割橋体Ｂの各部材が掘削溝の両脇に設けられた側道の上方を通過することがない。
次に、設置した各部材をＰＣ鋼線やＰＣ鋼棒等のＰＣ鋼材によるポストテンション方式等によって一体化して分割橋体Ｂを完成する。
【００４４】
（５）底版設置工程
次に、移動式クレーン１及びトラックＴを前方に移動させ、完成した分割橋体Ｂの前方に新たに底版Ｃを設置可能なスペースを設ける。そして、揚重手段３を水平ジブ２の前方に移動させて底版Ｃを吊り上げ、揚重手段３を水平ジブ２の後方に移動させることで底版Ｃを搬送する。このとき、底版Ｃの幅員は脚部４０，４０同士及びレール部材４１，４１の間隔よりも大きいため、図６に示すように、底版Ｃの幅員方向を水平ジブ２の延長方向と平行にして搬送し、この状態でレール部材４１，４１の間隔内を通過させた後に、レール部材４１，４１の下方で底版Ｃを垂直軸周りに回転させて向きを調整して完成した分割橋体Ｂの前方に連続させて設置する。
【００４５】
（６）橋梁架設工程
次に、（５）底版設置工程において新たに設置した底版Ｃ上に移動式クレーン１の後方走行手段４２ｂを移動させ、（３）支持部材設置工程から（５）底版設置工程を繰り返すことで分割橋体Ｂを連続して掘削溝内に設置し、分割橋体Ｂ同士を一体化する。なお、分割橋体Ｂ同士の一体化は、全ての分割橋体Ｂを一括して一体化する方法や、部分毎に分割橋体Ｂを一体化した後に、部分毎に一体化した分割橋体Ｂ同士を一体化する方法でもよく、作業効率を考慮して適宜に変更することが好ましい。
次に、同様にして、交差点の中央を挟んで対峙する位置に分割橋体Ｂを連続させて構築し、頂版Ｅ同士の間に橋梁Ｆを架設する。
最後に、分割橋体式交通路Ａの上面をアスファルト等によって舗装して道路Ｋ３を構築し、分割橋体式交通路Ａを完成する。
【００４６】
したがって、本発明の実施形態に係る分割橋体式交通路の構築方法では、分割橋体Ｂの設置作業が底版Ｃの幅員内の領域で行われることから、狭い作業用地であっても、周辺地域社会の環境及び経済活動に与える影響を低減した状態で分割橋体式交通路Ａを容易に構築し、短期間に車両の通行を確保するため、既存の交通に与える影響が大幅に低減される。また、底版Ｃを基礎にすることで荷重が分散され、地盤を深く広く掘削する必要がないため、地中の埋設物に影響されることなく、分割橋体式交通路Ａを容易に構築することができる。
【００４７】
なお、移動式クレーンは、分割橋体Ｂの各部材を底版Ｃの幅員内の領域で搬送可能であれば、前記移動式クレーン１の構成に限定されるものではなく例えば、図７（ａ）に示すように、前方走行手段４２ａ及び後方走行手段４２ｂを底版Ｃの床面上に配置した構成の移動式クレーン１ａでもよい。この移動式クレーン１ａでは、走行台車４からの水平ジブ２の前方部の突出量が大きくなるため、揚重手段３が水平ジブ２の前方部で分割橋体Ｂの各部材を吊った場合に、移動式クレーン１ａの安定性を保つためのカウンタウェイト４６を走行台車４の後方部に設けている。
また、図７（ｂ）に示すように、走行台車４内に昇降台車５を設けることなく、簡易化した構成の移動式クレーン１ｂにしてもよい。この移動式クレーン１ｂでは、揚重手段３によって頂版Ｅを支持部材Ｄ，Ｄの上端同士の間に架設するため、揚重手段３による頂版Ｅの吊り上げ高さを支持部材Ｄの上端よりも高くする必要がある。そのため、揚重手段３のホイスト３２を水平ジブ２の上面に配置したり、水平ジブ２の高さ位置を上げることによって頂版Ｅの吊り上げ高さを確保している。
【００４８】
さらに、分割橋体式交通路は、前記分割橋体式交通路Ａに限定されるものではなく、例えば、交差点の中央を挟んで対峙する位置に連続して構築された分割橋体Ｂ同士の間に分割橋体を構築することで分割橋体式交通路を構築してもよい。さらに、既設道路上での設置に限定されるものではなく、全く新設の場合や、中央分離帯、植樹帯等での新設の場合でもよい。
【００４９】
また、分割橋体Ｂの構成は、支持部材Ｄが鋼製の支柱である構成や、支持部材Ｄを底版Ｃの中央に立設し、この支持部材Ｄによって頂版Ｅを中央で支持した構成や、２列に並列した各分割橋体Ｂ、さらに、二段に積み上げた各分割橋体Ｂを一体化した構成など、施工現場や顧客の要望に対応して適宜に変更されるものである。さらに、分割橋体式交通路Ａの構成としては、分割橋体Ｂの支持部材Ｄに車両が進入可能な開口部を設け、側道Ｓ１から分割橋体式交通路Ａの内部に進入した車両が橋梁Ｆの下方で右折して他方の道路Ｋ２に合流する構成にしてもよい。
また、分割橋体Ｂの底版Ｃに基礎杭を設けた構成にしてもよく、工場等で底版Ｃを形成する際に底版Ｃを貫通する垂直孔を形成し、分割橋体式交通路Ａを構築した後に垂直孔を貫通させて基礎杭を地中に打設してもよい。この構成では、分割橋体式交通路Ａを構築した後に、分割橋体Ｂに基礎杭を設けることができるため、分割橋体式交通路Ａによって少なくとも道路Ｋ３における車両の通行を確保した後に、道路Ｋ３の直下で基礎杭を設けることができる。なお、分割橋体Ｂ設置前に基礎杭を打設する方法も考えられる。
【００５０】
ここで、底版Ｃの中央に支持部材Ｄが立設された分割橋体Ｂ’を構築する場合には、図８に示した昇降台車５’を備えた移動式クレーン１ｃを用いることが好ましい。この昇降台車５’は、台座５０に立設した４本の伸縮支柱５２によって四隅が支持された四周枠５４を有しており、図８（ｂ）に示すように、四周枠５４の開口部５５に頂版Ｅの中央に突出している取付部を挿通させ、伸縮支柱５２を伸長させることで支持部材Ｄの上端部の高さ位置まで頂版Ｅを上昇させる。そして、昇降台車５’を移動させることで頂版Ｅを支持部材Ｄの上方に搬送した後に、四周枠５４を下降させて支持部材Ｄに頂版Ｅを設置する。なお、頂版Ｅの設置後、下降した四周枠５４の開口部５５内に支持部材Ｄが存在し、昇降台車５’を前方に移動させた際に、四周枠５４の後部の部材と支持部材Ｄが干渉するため、四周枠５４の部材を容易に取り外せるようにすることが好ましい。
【００５１】
以上、本発明について、好適な実施形態についての一例を説明したが、本発明は当該実施形態に限られず、本発明の趣旨を逸脱しない範囲で適宜設計変更が可能である。
【００５２】
【発明の効果】
本発明の分割橋体式交通路の構築方法では、分割橋体を底版と支持部材と頂版とに分割した状態で施工現場に搬入して組み付けることによって、分割橋体を容易に連続して既存の交通路上に設置し、高い強度及び安定性を有する分割橋体式交通路を短期間に構築するため、作業区間における車両の通行が早期に確保され、交通路の周辺に迂回路を設けることなく、周辺地域社会の環境及び経済活動に対する影響を低減するとともに、施工期間を短縮し、施工費を削減することができる。
さらに、分割橋体の各部材を既存の交通路の延長方向に沿って搬送することで、分割橋体の各部材は既存の交通路上に設けられた作業用地の上方を既存の交通路の延長方向に移動するため、狭い作業用地であっても、分割橋体の各部材を作業用地の側方の用地を通過させることなく、分割橋体式交通路を短期間に構築することができる。
また、板状の部材である底版を基礎とすることによって、基礎構築において地盤を深く広く掘削する必要がなくなるため、地中の埋設物に影響されることなく、分割橋体式交通路を容易に構築することができる。
また、緊張材又は締結材に緊張力を付加する構成では、分割橋体同士を確実に一体化するため、分割橋体式交通路の強度及び安定性を容易かつ短時間に高めることができる。
また、走行台車によって移動可能な移動式クレーンを用いることで、移動式クレーンを容易に移動させて搬送作業を行うことができる。これは、分割橋体を連続して設置する場合に有効であるとともに、移動式クレーンの設置作業を簡易化することができるため、施工期間を短縮することができる。
また、移動式クレーンの走行台車内に昇降台車を設けた構成では、搬送物を揚重手段によって設置高さまで上昇させることができない場合であっても、昇降台車の昇降手段によって搬送物を上昇させて設置することができるため、水平部材の高さ位置を低くすることで小型化及び軽量化された移動式クレーンを用いて分割橋体式交通路を構築することができる。
また、移動式クレーンの昇降台車に回転手段を設けた構成では、頂版の向きを容易に調整することができるため、頂版の設置作業を簡易化することができる。
【図面の簡単な説明】
【図１】本発明の実施形態に係る分割橋体式交通路を示した図で、（ａ）は分割橋体式交通路の側面図、（ｂ）は分割橋体式交通路の平面図である。
【図２】本発明の実施形態に係る移動式クレーンを示した側面図である。
【図３】本発明の実施形態に係る移動式クレーンを示した背面図である。
【図４】本発明の実施形態に係る支持部材設置工程を示した図で、（ａ）は荷取り作業を示した断面図、（ｂ）は支持部材を設置する際を示した背面図である。
【図５】本発明の実施形態に係る頂版設置工程を示した側面図である。
【図６】本発明の実施形態に係る底版設置工程を示した断面図である。
【図７】本発明の実施形態に係る移動式クレーンの他の構成を示した図で、（ａ）は前後の走行手段が底版上に配置された構成の移動式クレーンを示した側面図、（ｂ）は昇降台車を備えない構成を示した側面図である。
【図８】本発明の実施形態に係る分割橋体式交通路の構築方法において、支持部材が底版の中央に立設された分割橋体を構築する際を示した図で、（ａ）は頂版設置工程を示した側面図、（ｂ）は頂版設置工程を示した背面図である。
【符号の説明】
Ａ・・・・分割橋体式交通路
Ｂ・・・・分割橋体（分割橋体式交通路）
Ｃ・・・・底版（分割橋体）
Ｄ・・・・支持部材（分割橋体）
Ｅ・・・・頂版（分割橋体）
Ｆ・・・・橋梁（分割橋体式交通路）
Ｇ・・・・摺付部（分割橋体式交通路）
Ｈ・・・・Ｈ形鋼（分割橋体式交通路）
１・・・・移動式クレーン
２・・・・水平ジブ
２０・・・・前後レール（水平ジブ）
３・・・・揚重手段
３０・・・・ローラ部（揚重手段）
３１・・・・伸縮レール（揚重手段）
３２・・・・ホイスト（揚重手段）
３３・・・・固定レール（揚重手段）
３４・・・・可動レール（揚重手段）
３５・・・・吊具（揚重手段）
３６・・・・ワイヤ（揚重手段）
４・・・・走行台車
４０・・・・脚部（走行台車）
４１・・・・レール部材（走行台車）
４２・・・・走行手段（走行台車）
４２ａ・・・前方走行手段（走行台車）
４２ｂ・・・後方走行手段（走行台車）
４３・・・・溝部（走行台車）
４４・・・・隙間（走行台車）
４５・・・・ブラケット（走行台車）
５・・・・昇降台車
５０・・・・台座（昇降台車）
５１・・・・ローラ（昇降台車）
５２・・・・伸縮支柱（昇降台車）
５３・・・・回転台（昇降台車）
５４・・・・四周枠（昇降台車）
５５・・・・開口部（四周枠）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a divided bridge type traffic route.
[0002]
[Prior art]
Conventionally, in order to eliminate congestion at traffic road intersections, when constructing a three-dimensional intersection bridge directly above the traffic road, the construction of the three-dimensional crossing bridge directly regulates the traffic road traffic route. There was a constant traffic jam.
[0003]
Conventional three-dimensional crossing bridges were constructed by the following method.
(1) Pile placing process for placing a foundation pile that supports the footing.
(2) An excavation process for excavating a groove for installing a footing by excavating the periphery of the traffic road or on the traffic road to treat the pile head after placement.
(3) A concrete placing process in which a formwork is placed in the groove, and concrete is placed by placing reinforcing bars in the formwork.
(4) A pier erection process in which a footing having a foundation pile is formed by curing and hardening the placed concrete, and a pier of a three-dimensional crossing bridge is erected on this footing.
(5) A bridge erection process in which girders and floor slabs are erected on the piers of the three-dimensional crossing bridge standing on the footing to complete the three-dimensional crossing bridge.
[0004]
[Problems to be solved by the invention]
However, the construction of the conventional three-dimensional crossing bridge has the following problems.
In (1) pile driving process and (2) excavation process, noise and vibration are greatly generated and transmitted over a wide range, so the influence on neighboring residents is particularly great at night work, and the working time of the day is limited. For this reason, the construction period was prolonged and the traffic regulation of the traffic route was prolonged. In addition, when there are buried objects such as water pipes and electric wires in the ground below the road, it is necessary to prevent interference between these buried objects and the foundation pile, and the construction work becomes complicated. The construction period was prolonged.
[0005]
In the (1) pile placing process and (3) concrete placing process, it is necessary to carry the foundation pile, formwork and rebar to the construction site for storage, and in order to provide a storage site around or on the road, It had a great influence on the traffic of vehicles on existing traffic routes.
[0006]
In (3) concrete placing process and (4) pier standing process, it is difficult to place and cure concrete that forms footings in rainy weather, and the work progress is hindered by the weather, so the construction period is long. It was converted. Furthermore, in the curing of concrete, it is necessary to cover the exposed surface with a cloth and spray it with water in order to prevent cracks that occur in the concrete due to drying. there were. Moreover, since the construction work was interrupted during the concrete curing period, the construction period was prolonged.
[0007]
Therefore, in the construction of the conventional multi-level crossing bridge, it is necessary to greatly restrict the passage of vehicles on the existing traffic route, and the construction period becomes longer, so it is necessary to provide a detour around the traffic route. As the impact on the environment and economic activities of the surrounding community has increased, construction has become difficult, causing urban development to be significantly delayed.
[0008]
Therefore, the present invention has been made to solve the above problem, and in the case of constructing a traffic route above the existing traffic route, it is given to the existing traffic in order to ensure the passage of the vehicle in a short time. It is an object to provide a method for constructing a split-bridge traffic path that greatly reduces the impact.
[0009]
[Means for Solving the Problems]
The present invention is configured to solve the above-mentioned problem, and the invention according to claim 1 is a method for constructing a divided bridge type traffic route, (1) A horizontal member disposed above an existing traffic road, a lifting means movable in the extending direction of the existing traffic road along the horizontal member, and the horizontal member supported at a predetermined height, A mobile crane installation process in which a mobile crane composed of a traveling carriage movable in the extension direction of the existing traffic road is installed on the existing traffic road; and (2) a support member is lifted by a lifting means of the mobile crane. A support member installation process for lifting and transporting and standing on the bottom plate installed on an existing traffic route, and (3) Lifting and transporting the top plate by the lifting means of the mobile crane, and supporting it by the support member The top plate installation process to build the split bridge body, and (4) the support member installation process and the top plate installation process are repeated to install the split bridge body continuously on the existing traffic road, and the top plate of each split bridge body Split bridge type traffic route by providing a traffic route on the upper surface Division bridge body type traffic route construction process to build It is characterized by including.
[0010]
Here, the traffic road refers to various transportation such as roads, railway tracks, and traffic paths such as sidewalks.
In addition, the material of each member constituting the split bridge body is not limited to concrete or steel, and further, the shape is not limited, but in the present invention, a traffic road is provided on the upper surface of the split bridge body. Since it is provided, it needs to be a material and shape that can sufficiently withstand the load of a vehicle or the like. Moreover, it is preferable to use a precast member with high formation accuracy.
[0015]
Here, the lifting means of the mobile crane is not limited in its configuration, such as a winch that winds a wire having a hanging tool or an existing hoist, and the lifting means is not limited to the existing traffic route. It may be possible to move in the width direction and finely adjust the position of each member of the divided bridge body after conveying each member of the divided bridge body to above the installation position.
The traveling means for moving the traveling carriage is a caterpillar. (Registered trademark) The structure of the tire and the tire is not limited, and the drive system is not limited to an electric or internal combustion engine, and may be configured in combination with a non-driven traveling means.
[0016]
According to this invention, when each member of the divided bridge body is transported within the work site provided on the existing traffic road, the horizontal member of the mobile crane is disposed above the work site, thereby Since the lifting means for transporting each member moves above the work site in the direction of extension of the existing traffic route, each member of the split bridge passes through the site on the side of the work site even in a narrow work site. Therefore, it is possible to construct a divided bridge type traffic route in a short time.
In addition, since the mobile crane can be moved by a traveling carriage, it can be easily moved and transported. This is effective in extending the installation by continuously installing the divided bridge body continuously on the divided bridge body that is continuously installed, and can simplify the installation work of the mobile crane.
[0017]
Claims 2 The invention described in claim 1 The mobile crane has a lifting carriage that can move in the extension direction of the existing traffic road, and the top plate is installed on the lifting carriage in the top plate installation process. The top plate is moved up and down by the lift carriage, and the top plate is supported by the support member.
[0018]
According to the present invention, the lifting height of the top plate by the lifting means installed on the horizontal member is lower than the installation height of the top plate, and the top plate cannot be raised to the installation height by the lifting means. However, since the top plate can be transported to the installation height and installed on the support member by raising the top plate by the lifting means of the lifting carriage, the size and size can be reduced by lowering the height position of the horizontal member. It is possible to build a split bridge type traffic route using a lightweight mobile crane.
[0019]
Claims 3 The invention described in claim 2 2. The method for constructing a divided bridge type traffic road according to claim 1, wherein the elevating carriage includes a rotating means for rotating the top plate around a vertical axis, and the top plate is rotated around the vertical axis by the rotating means in the top plate installing step. And adjusting the direction of the top plate.
[0020]
According to the present invention, since the longitudinal direction of the top plate is transported in parallel with the extending direction of the work site, the orientation can be easily adjusted and installed, so even if the work site is narrow, the top plate Plate installation work can be simplified.
[0021]
Claims 4 The invention described in claim 1 to claim 1 3 The split bridge body type traffic road construction method according to any one of the above, wherein in the split bridge body type traffic road construction step, the split bridge bodies are integrated with a tension member or a fastening material.
[0022]
Here, the integration of the divided bridge bodies with the tension members means that both ends of the tension members which are PC steel materials such as PC steel wires and PC steel bars penetrating each member of a plurality of adjacent divided bridge bodies are divided bridge bodies. It is joining by what is called a post-tension system which fixes to a tension material and adds tension force to this tension material. In addition, the integration of the divided bridge bodies by the fastening material is a joining in which the divided bridge bodies are integrated by fastening bolts between adjacent divided bridge bodies and tightening nuts.
[0023]
According to the present invention, tension force is applied to the tension member or the fastening material to integrate the divided bridge bodies, so that the strength and stability of the divided bridge type traffic road can be increased in a short time.
[0024]
Therefore, in the present invention, in order to construct a divided bridge type traffic route above the existing traffic route in a short period of time and ensure early passage of vehicles etc. in the work section, there is no need to provide a detour around the traffic route. In addition to reducing the impact on the environment and economic activities of the surrounding community, the construction period can be shortened and construction costs can be reduced.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is used for the same element and the overlapping description shall be abbreviate | omitted.
[0026]
The method for constructing a divided bridge type traffic road according to an embodiment of the present invention can be applied to a traffic road such as an automobile road, a train track, or a sidewalk. In this embodiment, an intersection on an automobile road is three-dimensional. An example of the case will be described.
[0027]
[Split bridge type traffic route]
First, a split bridge type traffic road constructed by the split bridge type traffic road construction method according to the embodiment of the present invention will be described.
FIG. 1 is a view showing a divided bridge type traffic road according to an embodiment of the present invention, in which (a) is a side view of the divided bridge type traffic road, and (b) is a plan view of the divided bridge type traffic road.
[0028]
The divided bridge type traffic route A is a traffic route that is constructed above an existing traffic route and three-dimensionalizes the intersection in order to eliminate congestion at the intersection of the traffic route. As shown in FIG. Installed on one road K1 at the intersection where the road K1 and the other road K2 are orthogonal to each other, with the bridge B continuously installed facing each other across the center of the intersection, and the bridge F is installed between them It is a thing. The divided bridge bodies B are integrated with each other by a post-tension method using a PC steel material such as a PC steel wire or a PC steel rod, or by a joint using a bolt joint, and each divided bridge body B is formed at a predetermined height. A sloping road is formed so that the road K3 provided on the upper surface of the divided bridge type traffic road A is connected to one road K1, and the passage of vehicles on the road K1 is secured by the road K3 of the divided bridge type road A. . Reference numeral G denotes a sliding portion for connecting the road K3 of the divided bridge type road A and one road K1, and reference numerals S1 and S2 denote side roads provided on both sides of the divided bridge type road A. It is. Furthermore, the symbol H is an H-shaped steel laid in order to stably install the bottom plate C.
[0029]
Next, the configuration of the divided bridge body B will be described.
As shown in FIG. 1, the divided bridge body B includes a bottom plate C which is a rectangular member, a support member D which is two members erected at both ends in the width direction on the upper surface of the bottom plate C, and two sheets. This is a box having a rigid frame structure composed of a top plate E which is a rectangular member erected between the upper ends of the support member D. Each member of the divided bridge body B is a precast member formed in advance at a factory or the like, and is integrated by a post-tension method using a PC steel material such as a PC steel wire or a PC steel rod, or a joint using a bolt joint. Therefore, when the divided bridge body B is carried into the construction site, the divided bridge body B is carried in a state of being reduced in size and weight by being divided into the respective members.
[0030]
[Mobile crane]
Next, the mobile crane used for the construction method of the divided bridge type traffic road according to the embodiment of the present invention will be described.
FIG. 2 is a side view showing a mobile crane according to an embodiment of the present invention. FIG. 3 is a rear view showing the mobile crane according to the embodiment of the present invention.
[0031]
First, the configuration of the mobile crane will be described. In the following description, the front is the truck side of the mobile crane shown in FIG. 2, the rear is the split bridge body side of the mobile crane shown in FIG. 2, and the left-right direction is shown in FIG. It is the width direction of the mobile crane shown.
As shown in FIGS. 2 and 3, the mobile crane 1 has a horizontal jib 2 (horizontal member) that is a rectangular member in a plan view in which the extension direction is arranged in parallel with the bridge axis direction of the divided bridge type traffic path A. A lifting means 3 provided on the lower surface of the horizontal jib 2 and movable in the front-rear direction along the horizontal jib 2 and movable in the left-right direction within the horizontal range of the horizontal jib 2; The jib 2 is supported at a predetermined height, and is composed of a traveling carriage 4 that can move on the bottom plate C, and an elevating carriage 5 that can move in the traveling carriage 4 in the front-rear direction. Each member of B can be lifted and conveyed.
[0032]
Next, each component of the mobile crane 1 will be described.
As shown in FIGS. 2 and 3, the horizontal jib 2 is disposed at a predetermined height, and two front and rear rails 20 extending in the front-rear direction are attached to the lower surface. Is formed smaller than the width of the bottom plate C.
[0033]
As shown in FIGS. 2 and 3, the lifting means 3 is suspended by two front and rear rails 20 attached to the lower surface of the horizontal jib 2 and moves in the front and rear direction along the front and rear rails 20. A part 30; a telescopic rail 31 that is attached to the lower part of the roller part 30 in the left-right direction, and is extendable in the left-right direction; and a hoist 32 suspended from the telescopic rail 31; Each member of B is lifted and conveyed.
The telescopic rail 31 is composed of a fixed rail 33 fixed to the lower portion of the roller portion 30 and a movable rail 34 that slides in the left-right direction along the fixed rail 33 and on which the hoist 32 is suspended. The length of the rail 33 in the left-right direction is shorter than the interval between the left and right legs 40, 40 standing on the traveling carriage 4 described later, and the length of the movable rail 34 in the left-right direction is fixed rail 33. Is shorter than the length in the left-right direction. Therefore, when the movable rail 34 is disposed at the center of the fixed rail 33, the fixed rail 33, the movable rail 34, and the hoist 32 are accommodated within the interval between the left and right leg portions 40, 40 as shown in FIG. It has become.
The hoist 32 includes a suspension 35 for lifting each member of the split bridge body B, and lifts each member by winding up a wire 36 connected to the suspension 35. Can be moved to.
[0034]
As shown in FIGS. 2 and 3, the traveling carriage 4 is installed at both left and right ends of the lower surface of the horizontal jib 2, and left and right leg portions 40, 40 that support the horizontal jib 2, 40 is erected, and is composed of left and right rail members 41, 41 whose longitudinal direction is arranged parallel to the extending direction of the horizontal jib 2, and traveling means 42 installed on the lower surface of each rail member 41, 41. The left and right rail members 41, 41 have a U-shaped cross section and have groove portions 43. The open portions of the groove portions 43 are arranged to face each other in the inner direction, and the left and right rail members 41, 41 facing each other The width in the direction is the same as the horizontal width of the horizontal jib 2.
[0035]
The traveling means 42 moves the mobile crane 1, and as shown in FIGS. 2 and 3, the forward traveling means 42 a that is a non-drive type tire disposed substantially below the front end of the horizontal jib 2. And a drive-type caterpillar disposed substantially below the rear end of the horizontal jib 2 (Registered trademark) The forward traveling means 42a and the backward traveling means 42b are installed one by one on the lower surfaces of the left and right rail members 41, 41, and the mobile crane is driven by the driving force of the backward traveling means 42b. Move 1 forward and backward. The configuration of the traveling means 42 is not limited to this, and the forward traveling means 42a may be driven. Furthermore, the drive system is not limited to electric or internal combustion engines.
Here, in the present embodiment, the rear traveling means 42b is disposed on the bottom plate C, and the front traveling means 42a is disposed on the ground in front of the bottom plate C. Therefore, a bracket is provided between the front traveling means 42a and the rail member 41. 45 is interposed, and the height position of the forward traveling means 42a is adjusted so that the rail member 41 is horizontally disposed.
Further, in the present embodiment, since the loading platform of the truck T on which the members of the divided bridge body B are loaded is disposed in the interval between the forward traveling means 42a and 42a, it is interposed between the forward traveling means 42a and the rail member 41. By projecting the bracket 45 in the left-right direction, the distance between the front traveling means 42 and 42a is increased, and the distance at which the loading platform of the truck T can be arranged is secured.
[0036]
The elevating carriage 5 moves in the traveling carriage 4 in the front-rear direction along the rail members 41, 41. As shown in FIGS. 2 and 3, a pedestal 50 that is a rectangular member in plan view, and a pedestal Four rollers 51 projecting in the left-right direction from the four corners of 50, an elevating column 52 (elevating means) installed on the upper surface of the pedestal 50, and a turntable installed on the upper end of the elevating column 52 and rotating around a vertical axis 53 (rotating means), and the turntable 53 moves up and down as the telescopic support column 52 expands and contracts in the vertical direction. The elevator cart 5 moves in the front-rear direction in the traveling cart 4 along the rail member 41 as each roller 51 moves in the groove 43 of the rail member 41. In this embodiment, the lifting column 52 is lifted and lowered using hydraulic pressure, but it may be a wire type or the like and is not limited. Further, the driving method of the turntable 53 is not limited to a hydraulic type or an electric type.
[0037]
Next, the operation of the mobile crane 1 will be described.
First, as shown in FIGS. 2 and 3, the mobile crane 1 is movable in the front-rear direction by the traveling means 42 of the traveling carriage 4.
Further, as shown in FIG. 3, when the movable rail 34 and the hoist 32 are disposed in the center of the fixed rail 33, the lifting means 3 is within the interval between the left and right rail members 41, 41 of the traveling carriage 4. Therefore, the center of the lower surface of the horizontal jib 2 is moved in the front-rear direction without interfering with the left and right leg portions 40, 40. Further, the lifting means 3 moves the movable rail 34 of the telescopic rail 31 in the left-right direction, so that the hoist 32 suspended from the movable rail 34 moves to both ends of the bottom plate C in the width direction.
The lift carriage 5 is movable in the front-rear direction within the traveling carriage 4. The top plate E is placed on the top surface of the turntable 53, and the turntable 53 is rotated around the vertical axis to turn the top plate E. change. Further, the top plate E is raised by extending the telescopic support column 52.
[0038]
[How to construct a divided bridge type traffic route]
Next, the construction method of the divided bridge type traffic road according to the embodiment of the present invention will be described.
4A and 4B are diagrams showing a support member installation process according to an embodiment of the present invention, in which FIG. 4A is a cross-sectional view showing a loading operation, and FIG. . FIG. 5 is a side view showing the top plate installation process according to the embodiment of the present invention. FIG. 6 is a sectional view showing a bottom plate installation process according to the embodiment of the present invention. FIG. 7 is a view showing another configuration of the mobile crane according to the embodiment of the present invention. FIG. 7A is a side view showing the mobile crane having a configuration in which front and rear traveling means are arranged on the bottom plate. b) is a side view showing a configuration that does not include a lifting carriage. FIG. 8 is a diagram showing the construction of a split bridge body in which the support member is erected at the center of the bottom plate in the construction method of the split bridge body type road according to the embodiment of the present invention. The side view which showed the installation process, (b) is the rear view which showed the top plate installation process.
[0039]
(1) Drilling groove installation process
First, the excavation groove for installing the divided bridge type traffic road A is provided in one of the traffic roads K1, and H-section steel H is laid in the extending direction of the excavation groove on both sides of the bottom surface of the excavation groove. To cast. This excavation work is performed by closing or regulating the road during the time when traffic stops, such as at night, but since the construction is completed in a short period of time due to the small amount of excavation, the impact on existing traffic is reduced. Yes. In addition, since the depth of the excavation groove is shallow, even if an embedded object such as a water pipe or an electric wire exists below the excavation groove, it is not affected by the embedded object.
[0040]
(2) Mobile crane installation process
Next, several bottom slabs C are installed in the excavation groove in a continuous manner while securing the passage of the vehicle by the side roads S1 and S2 provided on both sides of the excavation groove. The number of sheets is the minimum number of sheets that can arrange the rear traveling means 42b of the mobile crane 1 on the installed bottom slab C, and is the number of sheets that can be installed by a small truck crane. It does not affect the traffic of S1 and S2.
Next, as shown in FIG. 2, the mobile crane 1 is installed in the excavation groove. At this time, the backward running means 42b is arranged on the continuously installed bottom plate C, and the forward running means 42a is placed on the upper surface of the H-shaped steel laid on the ground in front of the continuously installed bottom plate C. Deploy. Since the mobile crane 1 can be moved by the traveling means 42, the installation position of the mobile crane 1 can be easily adjusted.
[0041]
(3) Support member installation process
Next, as shown in FIG. 4A, the loading platform of the truck T on which the members of the divided bridge body B are loaded is disposed within the interval between the forward traveling means 42a and 42a.
Next, after the lifting means 3 of the mobile crane 1 is moved to the front of the horizontal jib 2 and the support member D is lifted, the lifting means 3 is moved to the rear of the horizontal jib 2 so as to be installed continuously. The bottom plate C is conveyed above the last part. Then, as shown in FIG. 4B, the hoist 32 is moved in the left-right direction above the bottom plate C, and the support members D are erected at both ends in the width direction of the bottom plate C. Here, when the lifting means 3 moves to the front end portion of the horizontal jib 2 and lifts each member of the split bridge body B, the load on the front portion of the mobile crane 1 increases. Since the forward traveling means 42a supporting the mobile crane 1 is disposed below the front end, the stability of the mobile crane 1 is not impaired.
[0042]
(4) Top plate installation process
Next, the lifting means 3 is moved to the front of the horizontal jib 2 to lift the top plate E, and the lifting means 3 is moved to the rear of the horizontal jib 2 to convey the top plate E. At this time, since the width of the top plate E is larger than the interval between the leg portions 40, 40, the width direction of the top plate E is made parallel to the extending direction of the horizontal jib 2 as shown in FIG. The top plate E is installed between the upper ends of the support members D and D erected on the bottom plate C. In the present embodiment, the height of the horizontal jib 2 is lowered to move the mobile crane 1. Since the size and weight are reduced, the lifting height of the top plate E by the lifting means 3 is lower than the installation height of the top plate E, and the top plate E cannot be installed by the lifting means 3. Therefore, as shown in FIG. 5, the top plate E is placed on the upper surface of the rotary table 53 of the lifting carriage 5 by the lifting means 3, and the lifting carriage 5 is moved rearward from the rear legs 40, 40. After the top plate E is rotated around the vertical axis by the turntable 53 and the orientation is adjusted, the telescopic column 52 is extended to raise the top plate E to the height of the upper end of the support member D, and the traveling carriage 4 is moved. It is constructed between the upper ends of the support members D, D by moving backward.
Further, a clearance 44 is provided between the upper end of the roller 51 of the lifting carriage 5 and the groove 43 of the rail member of the traveling carriage so that the lifting carriage 5 can move upward, and the top plate E is supported by the support members D and D. In the state where the top plate E and the turntable 53 are joined, the telescopic support column 52 is contracted to raise the lift carriage 5 so that the lift carriage 5 is suspended from the top plate E. By doing so, the load of the raising / lowering cart 5 and the crane 1 main body is added to the top plate E, the top plate E is pressed against the support member D, and both can be reliably joined, so that the construction accuracy is improved. be able to.
[0043]
Next, (3) the support member installation step and (4) the top plate installation step are repeated, and the support members D and the top plate E are sequentially installed on all the bottom plates C from the rear, and the divided bridge is continuously formed in the excavation groove Body B is installed. In the repetition of the (3) support member installation step and (4) top plate installation step, the rear side of the horizontal jib 2 is disposed above the bottom plate C, and the conveyance distance between the support member D and the top plate E is ensured long. There is no need to move the positions of the mobile crane 1 and the truck T every time one divided bridge body B is constructed, the work is simplified, and the construction period is shortened. Moreover, since each member of the split bridge body B passes directly under the horizontal jib 2, each member of the split bridge body B does not pass above the side road provided on both sides of the excavation groove.
Next, the installed bridge members B are completed by integrating the installed members by a post-tension method using a PC steel material such as a PC steel wire or a PC steel bar.
[0044]
(5) Bottom plate installation process
Next, the mobile crane 1 and the truck T are moved forward, and a space in which the bottom slab C can be newly installed is provided in front of the completed divided bridge body B. Then, the lifting means 3 is moved to the front of the horizontal jib 2 to lift the bottom plate C, and the lifting means 3 is moved to the rear of the horizontal jib 2 to convey the bottom plate C. At this time, since the width of the bottom plate C is larger than the interval between the leg portions 40, 40 and the rail members 41, 41, the width direction of the bottom plate C is made parallel to the extending direction of the horizontal jib 2, as shown in FIG. In this state, after passing through the space between the rail members 41, 41, the bottom plate C is rotated around the vertical axis below the rail members 41, 41 to adjust the direction, and the completed divided bridge body B is completed. Install continuously in front.
[0045]
(6) Bridge erection process
Next, the rear traveling means 42b of the mobile crane 1 is moved onto the newly installed bottom slab C in the (5) bottom slab installation process, and divided by repeating (3) the support member installation process and (5) the bottom slab installation process. The bridge body B is continuously installed in the excavation groove, and the divided bridge bodies B are integrated. In addition, the integration of the divided bridge bodies B is a method of integrating all the divided bridge bodies B at once, or a divided bridge body that is integrated for each part after the divided bridge bodies B are integrated for each part. The method of integrating B may be sufficient, and it is preferable to change suitably considering work efficiency.
Next, similarly, the divided bridge bodies B are continuously constructed at positions facing each other across the center of the intersection, and the bridge F is installed between the top plates E.
Finally, road K3 is constructed by paving the upper surface of divided bridge type traffic road A with asphalt or the like to complete divided bridge type road A.
[0046]
Therefore, in the construction method of the divided bridge body type traffic road according to the embodiment of the present invention, since the installation work of the divided bridge body B is performed in the area within the width of the bottom slab C, even if it is a narrow work site, the surrounding area Since the divided bridge type traffic route A is easily constructed in a state where the influence on the social environment and economic activities is reduced and the passage of vehicles is ensured in a short period of time, the influence on the existing traffic is greatly reduced. In addition, since the load is distributed by using the bottom slab C as a base, it is not necessary to excavate deeply and deeply, so it is easy to build a split bridge type traffic route A without being affected by underground objects. Can do.
[0047]
The mobile crane is not limited to the configuration of the mobile crane 1 as long as each member of the divided bridge body B can be transported in the area within the width of the bottom slab C. For example, FIG. As shown in FIG. 4, the mobile crane 1a having a configuration in which the forward traveling means 42a and the backward traveling means 42b are arranged on the floor surface of the bottom slab C may be used. In this mobile crane 1 a, the amount of protrusion of the front part of the horizontal jib 2 from the traveling carriage 4 increases, so that when the lifting means 3 suspends each member of the split bridge body B at the front part of the horizontal jib 2. A counterweight 46 for maintaining the stability of the mobile crane 1a is provided at the rear portion of the traveling carriage 4.
Moreover, as shown in FIG.7 (b), you may make it the mobile crane 1b of the simplified structure, without providing the raising / lowering cart 5 in the traveling cart 4. FIG. In this mobile crane 1b, the top plate E is installed between the upper ends of the support members D and D by the lifting means 3, so that the lifting height of the top plate E by the lifting means 3 is higher than the upper end of the support member D. Need to be higher. Therefore, the lifting height of the top plate E is secured by arranging the hoist 32 of the lifting means 3 on the upper surface of the horizontal jib 2 or raising the height position of the horizontal jib 2.
[0048]
Furthermore, the divided bridge type traffic road is not limited to the divided bridge type road A, for example, between the divided bridge bodies B constructed continuously at positions facing each other across the center of the intersection. You may build a divided bridge type traffic way by building a divided bridge body. Furthermore, the present invention is not limited to installation on an existing road, and may be entirely new or may be newly established in a median strip, a tree planting zone, or the like.
[0049]
The structure of the divided bridge body B includes a structure in which the support member D is a steel support, and a structure in which the support member D is erected at the center of the bottom plate C and the top plate E is supported at the center by the support member D. In addition, the divided bridge bodies B arranged in two rows, and the divided bridge bodies B stacked in two stages are integrated as appropriate so as to meet the demands of the construction site and customers. . Further, as the structure of the divided bridge type traffic route A, an opening through which a vehicle can enter is provided in the support member D of the divided bridge type B, and the vehicle that has entered the divided bridge type traffic route A from the side road S1 is a bridge. You may make it the structure which turns right under F and merges with the other road K2.
In addition, a foundation pile may be provided on the bottom slab C of the divided bridge body B. When forming the bottom slab C at a factory or the like, a vertical hole that penetrates the bottom slab C is formed to construct a divided bridge body type traffic route A. After that, the foundation pile may be driven into the ground by penetrating the vertical hole. In this configuration, since the foundation pile can be provided in the divided bridge body B after the divided bridge body type traffic road A is constructed, the road K3 is secured after securing the passage of the vehicle on the road K3 at least by the divided bridge body type traffic road A. Foundation piles can be provided directly under In addition, the method of driving a foundation pile before division | segmentation bridge body B installation is also considered.
[0050]
Here, when constructing the split bridge body B ′ in which the support member D is erected in the center of the bottom plate C, it is preferable to use the mobile crane 1c provided with the lifting carriage 5 ′ shown in FIG. This elevating carriage 5 'has a four-circumferential frame 54 supported at four corners by four telescopic columns 52 erected on a pedestal 50. As shown in FIG. The top plate E is raised to the height position of the upper end portion of the support member D by inserting the mounting portion protruding in the center of the top plate E through 55 and extending the telescopic support column 52. Then, after the top plate E is transported above the support member D by moving the lifting carriage 5 ′, the four-frame 54 is lowered to install the top plate E on the support member D. When the top plate E is installed, the support member D is present in the opening 55 of the lowered quadrilateral frame 54, and when the lifting carriage 5 'is moved forward, the rear member and the support member of the quadruple frame 54 are disposed. Since D interferes, it is preferable that the member of the four-frame 54 can be easily removed.
[0051]
As mentioned above, although an example about a suitable embodiment was explained about the present invention, the present invention is not restricted to the embodiment concerned, and a design change is possible suitably in the range which does not deviate from the meaning of the present invention.
[0052]
【The invention's effect】
In the method for constructing a divided bridge type traffic road according to the present invention, the divided bridge body can be easily and continuously existing by bringing it into the construction site in a state where it is divided into a bottom plate, a support member and a top plate. In order to build a high-strength and stable split-bridge type traffic route in a short period of time, the passage of vehicles in the work section is ensured early, and there is no detour around the traffic route. In addition to reducing the impact on the environment and economic activities of the surrounding community, the construction period can be shortened and construction costs can be reduced.
Furthermore, each member of the split bridge body is transported along the extension direction of the existing traffic road, so that each member of the split bridge body extends above the work site provided on the existing traffic road. Since it moves in the direction, even if it is a narrow work site, it is possible to construct a divided bridge type traffic route in a short time without passing each member of the split bridge body through the site on the side of the work site.
In addition, the foundation of the bottom plate, which is a plate-like member, eliminates the need for excavating the ground deeply and deeply in foundation construction, so it is easy to create a split-bridge type traffic route without being affected by underground objects. Can be built.
Also, add tension to the tension material or fastening material In configuration Since the divided bridge bodies are reliably integrated with each other, the strength and stability of the divided bridge type traffic road can be easily increased in a short time.
Also, using a mobile crane that can be moved by a traveling carriage By The mobile crane can be moved easily to carry out the transfer work. This is effective when the divided bridge bodies are continuously installed, and the installation work of the mobile crane can be simplified, so that the construction period can be shortened.
In addition, in the configuration in which the lift carriage is provided in the traveling carriage of the mobile crane, even if the transported object cannot be raised to the installation height by the lifting means, the transported article is raised by the lifting means of the lift carriage. Therefore, it is possible to construct a divided bridge type traffic path using a mobile crane that is reduced in size and weight by lowering the height position of the horizontal member.
Moreover, in the structure which provided the rotation means to the raising / lowering cart of the mobile crane, since the direction of a top plate can be adjusted easily, the installation operation | work of a top plate can be simplified.
[Brief description of the drawings]
1A and 1B are diagrams showing a divided bridge type traffic road according to an embodiment of the present invention, in which FIG. 1A is a side view of the divided bridge type traffic road, and FIG. 1B is a plan view of the divided bridge type traffic road;
FIG. 2 is a side view showing a mobile crane according to an embodiment of the present invention.
FIG. 3 is a rear view showing the mobile crane according to the embodiment of the present invention.
4A and 4B are diagrams illustrating a support member installation process according to an embodiment of the present invention, in which FIG. 4A is a cross-sectional view illustrating a loading operation, and FIG. 4B is a rear view illustrating when the support member is installed. is there.
FIG. 5 is a side view showing a top plate installation process according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a bottom plate installation process according to an embodiment of the present invention.
FIG. 7 is a view showing another configuration of the mobile crane according to the embodiment of the present invention, in which (a) is a side view showing the mobile crane having a configuration in which front and rear traveling means are arranged on the bottom plate; (B) is the side view which showed the structure which is not equipped with a raising / lowering cart.
FIG. 8 is a diagram showing a construction of a split bridge body in which a support member is erected at the center of the bottom plate in the method for constructing a split bridge body type traffic road according to an embodiment of the present invention. The side view which showed the plate installation process, (b) is the rear view which showed the top plate installation process.
[Explanation of symbols]
A ... Split-bridge type traffic route
B ... Split bridge (split bridge type traffic road)
C ... Bottom plate (divided bridge body)
D ... Supporting member (split bridge body)
E ··· Top plate (split bridge)
F .... Bridge (split bridge type traffic route)
G ... Sliding part (split bridge type traffic road)
H ··· H-section steel (split bridge type traffic road)
1 ... Mobile crane
2. Horizontal jib
20 ··· Front and rear rails (horizontal jib)
3 ... Lifting means
30 ... Roller (lifting means)
31 .. Telescopic rail (lifting means)
32... Hoist (lifting means)
33 .. Fixed rail (lifting means)
34 .. Movable rail (lifting means)
35... Suspension (lifting means)
36... Wire (lifting means)
4 ... Traveling cart
40 .... Leg (traveling cart)
41... Rail member (traveling carriage)
42... Traveling means (traveling carriage)
42a ... Forward traveling means (traveling carriage)
42b ... Backward traveling means (traveling carriage)
43... Groove (traveling carriage)
44 .... Gap (traveling carriage)
45 ··· Bracket (travel cart)
5 .... Elevating cart
50 ... Pedestal (lifting carriage)
51... Roller (lifting carriage)
52 .. Telescopic support (lifting carriage)
53 ··· Turntable (lifting carriage)
54 ··· Four-round frame (lifting carriage)
55... Opening (four-round frame)

Claims

A method for constructing a divided bridge type traffic road, comprising the following steps.
(1) A horizontal member disposed above an existing traffic road, a lifting means movable along the horizontal member in an extension direction of the existing traffic road, and the horizontal member at a predetermined height. A mobile crane installation step of installing on the existing traffic road a mobile crane configured to support and move in the extension direction of the existing traffic road.
(2) A support member installation step of lifting and supporting a support member by the lifting means of the mobile crane and standing on a bottom slab installed on the existing traffic path.
(3) A top plate installation step in which a top plate is lifted and conveyed by the lifting means of the mobile crane and is supported by the support member to construct a split bridge body.
(4) Repeat the support member installation step and the top plate installation step to continuously install the divided bridge bodies on the existing traffic road, and provide a traffic road on the top surface of the top plate of each divided bridge body. This is a split bridge type traffic route construction process that builds a split bridge type traffic route.

The mobile crane includes an elevating carriage that can move in an extension direction of the existing traffic path, and in the top plate installation process, the top plate is installed on the elevating carriage, and the top plate is moved up and down by the elevating carriage. be to, how to build a split bridge body type traffic routes according to claim 1, characterized in that for supporting said top plate to said support member.

The elevating carriage includes rotating means for rotating the top plate around a vertical axis, and in the top plate installing step, the top plate is rotated around the vertical axis by the rotating means to adjust the orientation of the top plate. The method for constructing a divided bridge type traffic route according to claim 2 .

The divided bridge body type traffic road according to any one of claims 1 to 3 , wherein, in the divided bridge body type traffic road construction step, the divided bridge bodies are integrated with each other by a tension member or a fastening material. How to build.