| 摘要 |
PURPOSE: A method for disjointing a large structure using laser is provided to prevent river pollution without separate working water processing facilities by reducing the amount of dust and heat generated when cutting the large structure. CONSTITUTION: A method for disjointing a large structure using laser comprises following steps. A laser beam is emitted on the outer circumference of a large structure and laser cutting is enabled in a first direction(S102). Separated pieces are collected(S106) by laser-cutting(S104) in a second direction which is vertically crossed by the first cutting line. If the thickness of the inner non-cutting site of a cut groove is larger than the valid cutting distance of once laser beam, a cutting groove process is repeated(S108,S116). If the thickness of the inner non-cutting site of a cut groove is smaller than the valid cutting distance of once laser beam, a nozzle is inserted into the cutting groove(S110).
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