伏ふせ越こし

noun

inverted siphon; siphon culvert

Civil engineering term for a pipe or culvert that dips under an obstacle (e.g., a river or road) and rises again, using siphon action to convey water or sewage.

• この水すい路ろは川かわの下したを伏ふせ越こしで通とおっている。

  This waterway passes under the river via an inverted siphon.

• 伏ふせ越こしの設せっ計けいには水すい圧あつの計けい算さんが欠かかせない。

  Calculating water pressure is essential for designing a siphon culvert.