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Centrifuge model study on pullout behavior of plate anchors in clay with linearly increasing strength

Meyer, V. (ed.), Frontiers in Offshore Geotechnics III: proceedings of the Third International Symposium on Frontiers in Offshore Geotechnics (ISFOG 2015), Oslo, Norway, 10-12 June 2015, CRC Press, Boca Raton, pp. 839-844.

10 Jun 2015
Chen, J., Leung, C.F., Chen, Z., Tho, K.K. and Chow, Y.K.
DOI: 10.1201/b18442-119

Oil and gas exploration has advanced to deep waters, which requires extensive use of floating production platform. Mooring of floating systems can be challenging because of significant vertical load transferred to the foundation systems. Suction Embedded Plate Anchor (SEPLA) is increasingly adopted as an economical and efficient mooring system. Centrifuge model tests are conducted in the present study to investigate the pullout behavior of square, rectangular and strip plate anchors in normally consolidated soft clay. Particle Image Velocimetry (PIV) technique is also employed to observe the soil displacement mechanisms during uplifting. Load-displacement curves and vertical pullout capacity factors for different anchor embedment depths obtained from a series of wished-in-place model plate anchor tests are reported in this paper. When the anchor embedment depth exceeds two times anchor width, it is found that a localized failure mechanism with full soil back-flow occurs and a limiting value of anchor capacity factor is reached.


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