| 摘要 |
PROBLEM TO BE SOLVED: To efficiently dismantle a concrete column of an existing reinforced concrete building, according to a blasting method. SOLUTION: In dismantling the existing building, at least two charge boreholes 3 are formed in the reinforced concrete column 1 or the like, and cylindrical bodies 10 in which explosive cartridges 4 are charged, are stored in the two charge boreholes 3, respectively. Each cylindrical body 10 has an opening formed in part of a circumferential surface, and by propagating blasting energy generated at the time of exploding the explosive cartridge 4 charged in the charge borehole, to the reinforced concrete column member 1 opposed to the opening, destruction having predetermined directivity is generated, which leads to efficient destruction of the column located between the two charge boreholes 3. COPYRIGHT: (C)2008,JPO&INPIT
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