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A platform for research: civil engineering, architecture and urbanism
INSTALLATION METHOD FOR COFFERDAM STRUCTURE TO BE USED FOR BRIDGE PIER MAINTENANCE/REINFORCEMENT WORK
PROBLEM TO BE SOLVED: To provide an installation method for a cofferdam structure to be used for bridge pier maintenance/reinforcement work by which the cofferdam structure can be easily constructed on the water and work for moving the cofferdam structure downwards into the water may also be easily performed.SOLUTION: A suspension scaffold 2 is installed in a non-submergence location at an upper side of a bridge pier 1 and on the suspension scaffold 2, a cofferdam structure 3 is constructed. In a bottom part of the cofferdam structure, a through-hole part 4 that is disposed while penetrating the bridge pier 1 is provided and the cofferdam structure is installed so as to enclose an outer periphery of the bridge pier 1. In the bridge pier 1 and the cofferdam structure 3, fall guides 5 are installed and via the fall guides 5, and the cofferdam structure 3 is moved downwards into the water under a bridge in relative to the bridge pier 1. A clearance between the through-hole part 4 in the bottom part of the cofferdam structure 3 and the outer periphery of the bridge pier 1 is cut off by cutoff means 6. After the cutoff is completed, water 7 in the cofferdam structure 3 is drained and the inside of the cofferdam structure 3 is made into a dry area for work.SELECTED DRAWING: Figure 2
【課題】仮締切り構造体を水上で容易に構築でき、仮締切り構造体の水中への降下作業も容易に行われる橋脚補修・補強工事に用いる仮締切り構造体の設置工法を提供すること。【解決手段】橋脚１の上方の非水没箇所に吊り足場２を設置し、この吊り足場２に、底部に橋脚１を貫通配設する貫通孔部４が設けられ橋脚１の外周を囲むように設置される仮締切り構造体３を構築し、橋脚１と仮締切り構造体３とに降下用ガイド５を設置し、この降下用ガイド５を介して橋脚１に対し仮締切り構造体３を橋下の水中に降下させ、この仮締切り構造体３底部の前記貫通孔部４と前記橋脚１の外周との間の隙間を止水手段６で止水し、止水完了後に仮締切り構造体３内に入り込んでいる水７を排水して、仮締切り構造体３内を作業用ドライエリアとする。【選択図】図２
INSTALLATION METHOD FOR COFFERDAM STRUCTURE TO BE USED FOR BRIDGE PIER MAINTENANCE/REINFORCEMENT WORK
PROBLEM TO BE SOLVED: To provide an installation method for a cofferdam structure to be used for bridge pier maintenance/reinforcement work by which the cofferdam structure can be easily constructed on the water and work for moving the cofferdam structure downwards into the water may also be easily performed.SOLUTION: A suspension scaffold 2 is installed in a non-submergence location at an upper side of a bridge pier 1 and on the suspension scaffold 2, a cofferdam structure 3 is constructed. In a bottom part of the cofferdam structure, a through-hole part 4 that is disposed while penetrating the bridge pier 1 is provided and the cofferdam structure is installed so as to enclose an outer periphery of the bridge pier 1. In the bridge pier 1 and the cofferdam structure 3, fall guides 5 are installed and via the fall guides 5, and the cofferdam structure 3 is moved downwards into the water under a bridge in relative to the bridge pier 1. A clearance between the through-hole part 4 in the bottom part of the cofferdam structure 3 and the outer periphery of the bridge pier 1 is cut off by cutoff means 6. After the cutoff is completed, water 7 in the cofferdam structure 3 is drained and the inside of the cofferdam structure 3 is made into a dry area for work.SELECTED DRAWING: Figure 2
【課題】仮締切り構造体を水上で容易に構築でき、仮締切り構造体の水中への降下作業も容易に行われる橋脚補修・補強工事に用いる仮締切り構造体の設置工法を提供すること。【解決手段】橋脚１の上方の非水没箇所に吊り足場２を設置し、この吊り足場２に、底部に橋脚１を貫通配設する貫通孔部４が設けられ橋脚１の外周を囲むように設置される仮締切り構造体３を構築し、橋脚１と仮締切り構造体３とに降下用ガイド５を設置し、この降下用ガイド５を介して橋脚１に対し仮締切り構造体３を橋下の水中に降下させ、この仮締切り構造体３底部の前記貫通孔部４と前記橋脚１の外周との間の隙間を止水手段６で止水し、止水完了後に仮締切り構造体３内に入り込んでいる水７を排水して、仮締切り構造体３内を作業用ドライエリアとする。【選択図】図２
INSTALLATION METHOD FOR COFFERDAM STRUCTURE TO BE USED FOR BRIDGE PIER MAINTENANCE/REINFORCEMENT WORK
橋脚補修・補強工事に用いる仮締切り構造体の設置工法
SATO YUUKI (author) / KASUGA HIDEFUMI (author) / MURAKAMI KOJI (author)
2018-02-15
Patent
Electronic Resource
Japanese
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