海底の砂地に打ち込んだ杭アンカ-の固定力について

概要

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Fishing gears and aqua-culture facilities are fixed frequently using anchorpile which is driven into the sand of the sea bed. We studied the relation between the fixed force and the diameter and depth of the driven pile into sand. Anchorpiles of various diameters which are made of steel pipe are driven into the sand at different depths. The piles were positioned in the water at high tide. The pile was left for twenty days, after which time a horizontal force was applied. Horizontal component force was measured continuously until the pile was pulled out. In this paper the fixed force of the pile was the same as the maximum value of the horizontal component force recorded. The fixed force of the pile can be expressed as follows, F=2.1(ρ-1)r1.4•D2.6×10-4 where, F(kgw) is the fixed force of the pile, r (cm) is the diameter of the pile, D (cm) is the depth of the driven pile into the sand, ρ is specific gravity of the sand.
日本水産學會の論文