| 摘要 |
PROBLEM TO BE SOLVED: To enhance efficiency of a demolishing work of a concrete structure. SOLUTION: To demolish a concrete structure having a skeleton 12 covered with a finish layer 14, a plurality of first holes 22 are formed in the finish layer 14 to such an extent as to reach the surface of the skeleton 12, and second holes 24 are formed in both the finish layer and the skeleton to an extent so as to reach a reinforcement 20 in the skeleton. Then, direct current is applied to the skeleton via the surface 13 of the skeleton exposed to the first holes and the reinforcement 20 exposed to the second holes, respectively. Thus, degraded areas 40 which are sequentially connected together, in a manner of making contact with the skeleton or partially superposing on each other, are generated. Thereafter, third holes 42 are formed in the degraded areas 40 of the skeleton to be connected to the first holes, and an expanding agent is fired into the third holes.
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