Interactional Properties between Drag Anchor and Installation Line
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 140, Issue 2
Abstract
During penetrating of a drag anchor in seabed soils, complex interaction happens between the anchor and installation line. It is important to clarify the properties of the drag force and drag angle at the shackle of the anchor, which are especially meaningful to the design and theoretical analysis of drag anchors. The interactional properties between the drag anchor and installation line are theoretically and experimentally investigated in the present work. Based on mechanical models for the embedded line and drag anchor, analytical expressions that can predict the drag force at the shackle for both cohesive and noncohesive soils are derived. Theoretical methods are also developed to predict not only the evolution but also the exact value of the drag angle at the shackle during anchor penetration. All the analytical methods are examined by comparing the predicted drag force and drag angle with available experimental data. A detailed parametric analysis is also performed to explore the effects of different parameters on the drag force and drag angle and to determine reasonable values of several key parameters, including the lateral soil pressure factor , the angle of interface friction , and the bearing capacity factor .
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Acknowledgments
Financial support from the National Natural Science Foundation of China (Grant Nos. 50639030 and 50979070) and the 863 Program of China (Grant No. 2006AA09Z348) is greatly acknowledged. The authors would also like to thank Mr. Wei Huang, Ms. Cun Hu, Mr. Chenglin Liu, Mr. Tao Gao, and Mr. Chen Wang for their generous help with the experiments and calculations.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 140 • Issue 2 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 16, 2011
Accepted: Aug 29, 2013
Published online: Aug 30, 2013
Published in print: Feb 1, 2014
Discussion open until: Apr 22, 2014
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