| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that a large quantity of heavy weights such as concrete and a steel material are used, and moreover, a very long period of time is required for execution from foundation work to construction of a dam body in a conventional erosion control dam, and also, there are such problems that a large quantity of excavated soil is generated and how the excavated soil is disposed and carried in the mountainous region. SOLUTION: The structure is characterized in that an area for catching flow-down matters is formed by arranging at least two piles apart at a prescribed interval in the direction perpendicular to a flow as a pile structure in the vicinity of a bent part of a river and a mountain stream. Among other things, it is characterized in that the flow-down matters with a declined flow speed are accumulated altogether by arranging the pile structure in the vicinity of the terminal point of the bent part.
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