DEMOLITION METHOD FOR CONCRETE STRUCTURE AND EXPLOSIVE DEVICE FOR THE SAME

PROBLEM TO BE SOLVED: To provide a demolition method by which demolition of concrete structure can be conducted in a shorter time than the method using only a heavy machine and which generates less noise and vibration as well as scatters less dust and debris than the method by explosion.SOLUTION: Explosive devices are provided with the small amount of pellet-shaped molded explosive pellets 4 and an electronic device 2 capable of controlling detonation timing by unit of 1 ms. The explosive devices are loaded in bore holes formed in a concrete structure at appropriate intervals, and are detonated in short period delay by time differences of seconds to generate a crack in the concrete structure. Subsequently the concrete structure is broken by a heavy machine.