Experimental Study on Holding Power of Anchor

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  • アンカーの把駐性に関する実験的研究
  • アンカー ノ ハチュウセイ ニ カンスル ジッケンテキ ケンキュウ

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In this paper a method of estimating the holding power of the anchor in the sea bottom soil mixed with sand and clay is presented. The coefficient of holding power of the anchor, λ_e, is approximately obtained as follows: [numerical formula] where e_s and e_c are the mixture ratio of sand and of clay in the bottom soil, while λ_s and λ_c are the ratio of maximum dragging pull to the weight of the anchor obtained by model tests in sand and in clay respectively. The effects of shape factors of the anchor and conditions of soil on the holding power may be predicted using the results of model anchor tests, and it is confirmed that the calculated results show fairly good agreement with the results of actual anchor test. Moreover, a dragging stability index is proposed to clarify the expression of dragging stability of the anchor.

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