Behavior of Piggy-Backed Drag Embedment Anchors in Marine Soils
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 1
Abstract
This paper summarizes the analytical and experimental results of piggy-backed drag embedment anchors composed of two drag embedment anchors. Drag embedment tests with piggy-backed drag embedment anchors were performed with the spacing between the two anchors at 5.4 fluke length. The experimental results provide a validation of analytical model. The study reveals that: (1) the calibrated piggy-backed prediction model can predict the capacity, trajectory, and pitch of the front and back anchor in the piggy-backed configuration, and (2) the total capacity of the piggy-backed drag embedment anchors can be greater than twice the capacity of an individual anchor because the piggy-back arrangement forces the front anchor to mobilize more rotational resistance than when it is free to rotate as an individual anchor.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This material is based upon work supported by “Users Group for Enhancements to Drag Anchor Capacity and Trajectory Program,” a Joint Industry Project supported by the offshore oil and gas industry and managed by ABSG Consulting, Inc. The support by the National Natural Science Foundation of China (No. 51809231) and the Chinese Program of Introducing Talents of Discipline to University (111 Project) (No. B18047) is also acknowledged.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 1 • January 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 27, 2021
Accepted: Sep 1, 2021
Published online: Oct 19, 2021
Published in print: Jan 1, 2022
Discussion open until: Mar 19, 2022
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