海底堆積物からみた錨効きについて-II : 伊勢湾および渥美湾
スポンサーリンク
概要
- 論文の詳細を見る
The authors investigated the submarine deposits in both Ise Bay and Atsumi Bay to find out the relation between the nature of the deposits and the holding power of an anchor. As a result, it was found that the holding power relates to the grain size of the deposits and that it increases as the deposit grain becomes coarser. When the grain size of the deposit was represented by three kinds of factors, i.e. mud content, Mdφ and Mφ, it was found that the correlation coefficients to the holding power (Eq.s (1), (3) and (4) in this report) were almost the same for each factor. Therefore any one of the above factors may be used as the criterion for the holding power of an anchor. It is considered, however, that it is unbiased to employ either Mdφ or Mφ, each of which fully takes into account the grain diameter, instead of the mud content. Fig.7 shows the holding power of an anchor expressed in terms of Mdφ in both bays. Collating these results with the sea chart, we can see that the points with bottom-material-notations of "S" or "S.G" give the good holding power. However, it should be noted here, that when the anchor flukes face upward the holding power decreases as the deposit grain becomes coarser, contrary to the above. (Refer to Fig.7.) In addition, when the holding power of an anchor is evaluated based on the grain size, the locality characteristics varying depending on the depositing circumstances should be examined for each bay, because it is considered that they also affect the holding power.
- 社団法人日本航海学会の論文
- 1987-09-25
著者
関連論文
- 市販の表型・グラフソフトウェアーを利用した地質データー処理 -粒度分析データーを例として-
- 錨の水槽実験に関する一考察
- 砂質土における錨の把駐力の推定
- 北海道における漁船海難の推移について(1981-1990)
- 錨地の評価に関する一考察
- 荒天中の錨泊について-II : アンケートによる
- 錨の大きさと錨効きについて
- 荒天中の錨泊について : アンケートによる
- スミス・マッキンタイヤーグラブ式採泥器による試料採取
- 深い錨地の底質と使用錨鎖長