CONTAMINATED SOIL CLEANING METHOD

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PROBLEM TO BE SOLVED : To provide a contaminated soil cleaning method for cleaning contaminated soil, at the same time, performing ground strengthening and, even after the ground strengthening, cleaning contaminated soil and contaminated ground water. SOLUTION : The contaminated soil cleaning method is a method of cleaning soil by vertically disposing an underground pile 54a to the contaminated soil 50, and includes : a process of digging a pit 51 up to a depth where contaminated earth 52 exists; and a process of charging, in the pit 51, mixed material C for underground pile formation made by mixing discharge earth discharged by digging or earth B for underground formation prepared beforehand and an alkali activation persulfate as a cleaning agent A selected from among any of sodium persulfate, potassium persulfate and ammonium persulfate into the pit, and burying the pit 51 back, and after charging the mixed material C for underground pile formation into the pit 51, sodium hydroxide or potassium hydroxide is charged into the pit 51, and thus the cleaning is performed. COPYRIGHT : (C)2011, JPO&INPIT