| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage pipe capable of effectively preventing the collapse of soil caused by the drainage pipe provided with drip holes. SOLUTION: A pipe body 12 driven or inserted into a slope of an unstable sediment part and having a predetermined length is formed. A plurality of drip holes 15 communicated with the inside are formed on a peripheral face of the pipe body 12. A non-flow-out part 16 for preventing water drained through the inside of the pipe body 12 from flowing out into the sediment part is formed over a predetermined length from an end part on an exposed part side of the pipe body 12 driven or inserted into the slope of the sediment part.
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