| 摘要 |
PROBLEM TO BE SOLVED: To secure a stagnant part in the vicinity of a concrete structure for offering a spawning function, a fish collecting function, a seaweed adhesion function, and the like by forming an uneven part in the concrete structure such as a concrete caisson, a wave dissipating block, a foot protecting block, and a covering block. SOLUTION: In this concrete structure, a flexible form body having unevenness is arranged on the surface.
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