| 摘要 |
PROBLEM TO BE SOLVED: To provide a pile made of thinned wood, which can prevent soil on a slope from being washed out to prevent the slope from being laid waste and can reduce carbon monoxide. SOLUTION: A piece of thinned wood is cut in such a length that the cut piece can be easily driven into the soil as a pile body. The tip 2 of the cut piece is sharpened and shaped into a pile. A hole 3 having a rather large size within a range capable of retaining the strength of the pile is bored in the center of the pile. Many holes 4 are bored to allow rainwater to easily flow into the hole 3 bored in the center from outside. Holes 5 are bored in the root of the hole 3 in the center of the pile body to allow accumulated rainwater to easily flow out of the pile. The hole 3 in the center of the pile body is filled with leaf mold and charcoal. Acid rain entering the hole 3 in the center is neutralized by the charcoal, then is filtered with the leaf mold and penetrates deeply into the ground. Further, the pile driven into the soil decays and becomes soil as is after an elapse of years. The leaf mold and the charcoal filled in the pile become constituents of good quality soil. Thus, penetration of rainwater can be retained for a long time, and carbon dioxide can be reduced. COPYRIGHT: (C)2007,JPO&INPIT
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