| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for purifying soil, excellent in a washing effect on a contaminated region. SOLUTION: (1) In a treating method utilizing trenches, consisting of a water pouring trench and a water pumping trench provided in soil, washing water is discharged with pulsation from a wall surface of the water pouring trench into soil to run on the contaminated region between the water pouring trench and the water pumping trench, and washing water passed through the contaminated region is pumped by the pumping trench to be purified, and (2) in a treating method by a high pressure drilling, wherein drilled apertures reaching the contaminated region are formed, a rotating shaft provided with a nozzle is inserted into the drilled aperture, water and air are injected under a high pressure from the nozzle through the rotating shaft to drill the peripheral contaminated soil, and the drilled contaminated soil is discharged through the drilled aperture to purifying the discharged contaminated soil. COPYRIGHT: (C)2004,JPO&NCIPI |
