Effects of Reconsolidation Time on the Holding Capacity of Deepwater Dynamically Installed Anchors

A dynamically installed anchor (DIA) is a practical and promising type of anchor for deepwater offshore engineering. Currently, very few research studies have reported the effects of reconsolidation time on the holding capacity of DIA. Moreover, there is no well-established, simple, and practical method for determining the time-dependent holding capacity of DIA. To solve this problem, we conducted a series of centrifuge model tests by varying the reconsolidation time. In the intermediate-term reconsolidation scenario, the normalized holding capacity increased with the dimensionless time in an approximately log-linear manner. Based on this finding and conventional American Petroleum Institute (API) method put forth in 2007 as well as the cylindrical cavity expansion theory, we developed a simple three-term framework to estimate the time-dependent holding capacity of DIA. In this framework, cavity closure and skin friction were quantitatively correlated with the reconsolidation time. To validate the feasibi...