FIELD MEASUREMENTS OF THE HOLDING POWER OF MOORING ANCHORS FOR SILT CURTAIN

Abstract

Field verification of the holding power of mooring anchors was conducted on a seabed composed of silt and sand located in Maizuru Bay, Kyoto, Japan. The observed holding power of the anchors was compared with estimates based on the current design, popular in Japan. The holding power depends strongly on the properties of the seabed deposit, the type of anchor and the duration of service. The coefficient of holding power, which is defined as the ratio of the maximum holding power to the submerged weight of the anchor, was introduced to examine the effects of the loading speed and angle of the mooring wire on the anchors.