| 摘要 |
PROBLEM TO BE SOLVED: To provide a decomposable built-up pool suitable for composing a side wall of a pool of a deep water depth, and to provide, especially, technique for adjusting length (or distance) of an officially recognized pool by adjusting distance between the side walls of the pool. SOLUTION: In this decomposable built-up pool for forming a side wall of the pool by combining plural side wall segments with each other, the side wall segment comprises plural upper segments in which adjacent segments are water-tightly jointed with each other, and plural lower segments in which adjacent segments are water-tightly jointed with each other. The upper segment and the lower segment are bolt-jointed with each other at outward flanges formed on their end edges, and a seal part is provided at a joint part of each flange to hold water tightness.
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