METHOD FOR DISMANTLING REINFORCEMENT CONCRETE STRUCTURE PARTLY

• Main Authors: NAKAMORI JUNICHIRO, YAMAJI HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 14.01.2021
• Subjects: ASSEMBLY OF BRIDGES; BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; OR VIADUCTS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING

To provide a method for restricting a steady noise and dismantling a reinforcement concrete structure partly with a superior work efficiency and a low cost so that an existing reinforcement projects from a fracture surface.SOLUTION: In order to dismantle an end in a bridge width direction of a reinforcement concrete floor slab 2 partly in a state of leaving horizontal main reinforcements 6, a plurality of shot holes 12 are drilled from an upper surface of the reinforcement concrete floor slab 2 downward along a row extending in the bridge width direction. A detonation material 11 is loaded in the shot hole 12. The shot holes 12 are arranged at a substantially equal distance from the horizontal main reinforcements 6 each other on both side of the respective horizontal main reinforcements 6. The detonation material 11 of the same row is detonated at the same time.SELECTED DRAWING: Figure 1 【課題】定常的な騒音を抑制し、良好な作業効率かつ低コストで、既設の鉄筋が破砕面から突出するように、鉄筋コンクリート構造物を部分解体する方法を提供する。【解決手段】鉄筋コンクリート床版２の橋幅方向の端部を横主筋６を残した状態で解体するため、橋軸方向に延在する列に沿って複数の装薬孔１２を鉄筋コンクリート床版２の上面から下方に向かって削孔する。装薬孔１２には起爆材１１が装薬される。装薬孔１２は、各々の横主筋６を挟み、該横主筋６から互いに略等しい距離になるように配置される。同じ列の起爆材１１は同時に起爆される。【選択図】図１