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A platform for research: civil engineering, architecture and urbanism
CHARGING METHOD FOR CONTROLLING CRACKING IN BLASTING CONCRETE SKELETON
PROBLEM TO BE SOLVED: To provide a method of reducing environmental load and occurrence of cracking in blasting concrete.SOLUTION: A charging hole (10) of a prescribed depth from a surface of a concrete skeleton (2) is formed, further first and second crack guide holes (12a, 12b) formed on positions via the charging hole on a first straight line (14) passing through the charging hole on a surface of the concrete skeleton, and third and fourth crack guide holes (12c, 12d) formed on positions via the charging hole on a second straight line (14) passing through the charging hole on a surface of the concrete skeleton, and having a prescribed angle (θ) with the first straight line, are formed, an explosive (8) is placed in the charging hole, and the explosive is initiated. Thus the crack generates along the first straight line and the second straight line, and progress of the cracks is stopped at the first to fourth crack guide holes or their neighborhood.SELECTED DRAWING: Figure 1
【課題】コンクリートを爆破する際に、環境への負荷を低減し、かつひび割れの発生を制御できる方法を提供する。【解決手段】コンクリート躯体（２）の表面から所定の深さの装薬孔（１０）を形成し、コンクリート躯体の表面において装薬孔を通る第１直線（１４）上の互いに装薬孔を挟む位置に配置された第１及び第２ひび割れ誘導孔（１２ａ，１２ｂ）、並びにコンクリート躯体の表面において装薬孔を通りかつ第１直線と所定の角度（θ）をなす第２直線（１４）上の互いに装薬孔を挟む位置に配置された第３及び第４ひび割れ誘導孔（１２ｃ，１２ｄ）を形成し、装薬孔の中に爆薬（８）を配置し、爆薬を起爆する。これにより、ひび割れは、第１直線及び第２直線に沿って発生し、ひび割れの進展は、第１〜第４ひび割れ誘導孔又はその近傍で停止する。【選択図】図１
CHARGING METHOD FOR CONTROLLING CRACKING IN BLASTING CONCRETE SKELETON
PROBLEM TO BE SOLVED: To provide a method of reducing environmental load and occurrence of cracking in blasting concrete.SOLUTION: A charging hole (10) of a prescribed depth from a surface of a concrete skeleton (2) is formed, further first and second crack guide holes (12a, 12b) formed on positions via the charging hole on a first straight line (14) passing through the charging hole on a surface of the concrete skeleton, and third and fourth crack guide holes (12c, 12d) formed on positions via the charging hole on a second straight line (14) passing through the charging hole on a surface of the concrete skeleton, and having a prescribed angle (θ) with the first straight line, are formed, an explosive (8) is placed in the charging hole, and the explosive is initiated. Thus the crack generates along the first straight line and the second straight line, and progress of the cracks is stopped at the first to fourth crack guide holes or their neighborhood.SELECTED DRAWING: Figure 1
【課題】コンクリートを爆破する際に、環境への負荷を低減し、かつひび割れの発生を制御できる方法を提供する。【解決手段】コンクリート躯体（２）の表面から所定の深さの装薬孔（１０）を形成し、コンクリート躯体の表面において装薬孔を通る第１直線（１４）上の互いに装薬孔を挟む位置に配置された第１及び第２ひび割れ誘導孔（１２ａ，１２ｂ）、並びにコンクリート躯体の表面において装薬孔を通りかつ第１直線と所定の角度（θ）をなす第２直線（１４）上の互いに装薬孔を挟む位置に配置された第３及び第４ひび割れ誘導孔（１２ｃ，１２ｄ）を形成し、装薬孔の中に爆薬（８）を配置し、爆薬を起爆する。これにより、ひび割れは、第１直線及び第２直線に沿って発生し、ひび割れの進展は、第１〜第４ひび割れ誘導孔又はその近傍で停止する。【選択図】図１
CHARGING METHOD FOR CONTROLLING CRACKING IN BLASTING CONCRETE SKELETON
コンクリート躯体の爆破におけるひび割れを制御するための装薬方法
YAMAJI HIROSHI (author) / NAKAMORI JUNICHIRO (author)
2017-06-29
Patent
Electronic Resource
Japanese
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