수중 구조물 | 엔지니어는 어떻게 이것을 만들까요?
Sabin 토목공학 · 9:30
Bridge piers in water are built "in the dry": workers drive interlocking sheet piles down to bedrock to make a cofferdam, brace it against inward water pressure, pump it out, and pour a tremie-placed concrete seal tha...