| 摘要 |
PROBLEM TO BE SOLVED: To provide such a drainage material casting casing as it is not crushed by resistance, etc., in the case drainage material is to be cast in the ground. SOLUTION: A drainage material casting casing 10 is used for holding drainage material in the case it is cast in the ground. In that case, in the case a pair of long casing materials 11, 12 are combined with each other, a drainage material storage section 14 for storing the drainage material is formed between both casing materials and, at the same time, bearing pieces 15 projected in the direction of the inside of one casing material 12 are provided in at least the inside of the other casing material 11.
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