Inclined Pullout Capacity of Suction Anchors in Clay over Silty Sand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 149, Issue 6
Abstract
This study presents a range of numerical modeling to evaluate the pullout capability of suction anchors subjected to inclined mooring loading in a clay-over-silty-sand deposit. Comprehensive numerical models were generated, which were validated against existing centrifuge testing and numerical modeling results. A parametric study was then carried out to assess the effects of the anchor length, padeye location, mooring angle, and layered deposits on the pullout capacity of suction anchors. According to the numerical simulation results, the following key design factors were obtained: (1) the optimal padeye position, (2) the ultimate horizontal and vertical pullout abilities, and (3) the horizontal load distributions at different padeyes. A simple framework of calculating the combined surfaces of the anchors was developed for preliminary prediction of the pullout capacity of suction anchors in a clay-over-silty-sand deposit that provides the optimized location of padeyes and more accurate prediction for the holding capacity of anchor. The design method proposed by this study can contribute to optimize and improve the current design guideline for more accurately predicting the bearing capacity of anchors in clay-over-silty-sand soil deposits.
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Data Availability Statement
The detailed data sets and models generated during the current study are available from the corresponding author upon reasonable request.
Acknowledgments
The first two authors are financially supported by the National Natural Science Foundation of China (No. 42276213), Special Fund Project of Six Major Marine Industries in 2022 (GDNRC[2022]27), Guangdong Basic and Applied Basic Research Foundation (2021A1515010828), Key-Area Research and Development Program of Guangdong Province (NO. 2020B0101130009), and Fundamental Research Funds for the Central Universities with Account No. D2220740.
References
Al-Janabi, H. A., and C. P. Aubeny. 2022. “Experimental and numerical investigation of the performance of piles and suction caissons subjected to inclined cyclic loading in cohesive soils.” J. Geotech. Geoenviron. Eng. 148 (6): 04022036. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002789.
Andersen, K. H., and H. P. Jostad. 1999. “Foundation design of skirted foundations and anchors in clay.” In Proc., Offshore Technology Conf. Houston: OnePetro.
Andersen, K. H., T. Lunne, T. J. Kvalstad, and C. F. Forsberg. 2008. “Deep water geotechnical engineering.” In Proc., of the 24th National Conf. of the Mexican Society of Soil Mechanics: Aguasclientes, 26–29. Oslo, Norway: NGI Publication 208.
API (American Petroleum Institute). 2011. Geotechnical and foundation design considerations. API RP 2GEO. Washington, DC: API.
ASTM. 2017. Standard practice for classification of soils for engineering purposes (unified soil classification system) 1. ASTM D2487-17. West Conshohocken, PA: ASTM.
Aubeny, C. P., S. W. Han, and J. D. Murff. 2003. “Inclined load capacity of suction caissons.” Int. J. Numer. Anal. Methods 27 (14): 1235–1254. https://doi.org/10.1002/nag.319.
Bang, S., K. D. Jones, K. O. Kim, Y. S. Kim, and Y. Cho. 2011. “Inclined loading capacity of suction piles in sand.” Ocean Eng. 38 (7): 915–924. https://doi.org/10.1016/j.oceaneng.2010.10.019.
Bang, S., J. C. Leahy, Y. Cho, and O. Kwon. 2006. “Horizontal bearing capacity of suction piles in sand.” Transp. Res. Rec. 1975 (1): 21–27. https://doi.org/10.1177/0361198106197500103.
Bhattacharya, S. 2019. Design of foundations for offshore wind turbines. New York: John Wiley & Sons.
Chang, C. S., and Z. Yin. 2011. “Micromechanical modeling for behavior of silty sand with influence of fine content.” Int. J. Solids Struct. 48 (19): 2655–2667. https://doi.org/10.1016/j.ijsolstr.2011.05.014.
Cheng, L., M. S. Hossain, Y. Hu, Y. H. Kim, and S. N. Ullah. 2021. “Failure envelope of suction caisson anchors subjected to combined loadings in sand.” Appl. Ocean Res. 114 (Sep): 102801. https://doi.org/10.1016/j.apor.2021.102801.
Clukey, E. C., C. P. Aubeny, and J. D. Murff. 2004. “Comparison of analytical and centrifuge model tests for suction caissons subjected to combined loads.” J. Offshore Mech. Arct. Eng. 126 (4): 364–367. https://doi.org/10.1115/1.1834624.
Davis, E. H., and J. R. Booker. 1973. “The effect of increasing strength with depth on the bearing capacity of clays.” Géotechnique 23 (4): 551–563. https://doi.org/10.1680/geot.1973.23.4.551.
Erbrich, C. T., and T. I. Tjelta. 1999. “Installation of bucket foundations and suction caissons in sand-geotechnical performance.” In Proc., Offshore Technology Conf. Houston: OnePetro.
Fu, D., Y. Zhang, Y. Yan, and H. P. Jostad. 2020. “Effects of tension gap on the holding capacity of suction anchors.” Mar. Struct. 69 (Jan): 102679. https://doi.org/10.1016/j.marstruc.2019.102679.
Gourvenec, S. 2008. “Effect of embedment on the undrained capacity of shallow foundations under general loading.” Géotechnique 58 (3): 177–185. https://doi.org/10.1680/geot.2008.58.3.177.
Gourvenec, S., and M. Randolph. 2003. “Effect of strength non-homogeneity on the shape of failure envelopes for combined loading of strip and circular foundations on clay.” Géotechnique 53 (6): 575–586. https://doi.org/10.1680/geot.2003.53.6.575.
Houlsby, G. T., and B. W. Byrne. 2005. “Design procedures for installation of suction caissons in clay and other materials.” Proc. Inst. Civ. Eng. Geotech. Eng. 158 (2): 75–82. https://doi.org/10.1680/geng.2005.158.2.75.
Hung, L. C., and S. Kim. 2014. “Evaluation of undrained bearing capacities of bucket foundations under combined loads.” Mar. Georesour. Geotechnol. 32 (1): 76–92. https://doi.org/10.1080/1064119X.2012.735346.
Jeanjean, P., D. Znidarcic, R. Phillips, H.-Y. Ko, S. Pfister, O. Cinicioglu, and K. Schroeder. 2006. “Centrifuge testing on suction anchors: Double-wall, over-consolidated clay, and layered soil profile.” In Proc., Offshore Technology Conf. Houston: OnePetro.
Jia, N., P. Zhang, Y. Liu, and H. Ding. 2018. “Bearing capacity of composite bucket foundations for offshore wind turbines in silty sand.” Ocean Eng. 151 (Mar): 1–11. https://doi.org/10.1016/j.oceaneng.2018.01.006.
Jin, G., J. Shin, S. Park, and K. Kim. 2013. “Unsaturated shear strength characteristics of Nakdong River silty sand.” J. Korean Geotech. Soc. 29 (2): 47–56. https://doi.org/10.7843/kgs.2013.29.2.47.
Kim, S., Y. W. Choo, and D. Kim. 2016. “Pullout capacity of horizontally loaded suction anchor installed in silty sand.” Mar. Georesour. Geotechnol. 34 (1): 87–95. https://doi.org/10.1080/1064119X.2014.961622.
Kim, S., Y. W. Choo, J. Kim, D. Kim, and O. Kwon. 2015. “Pullout resistance of group suction anchors in parallel array installed in silty sand subjected to horizontal loading–centrifuge and numerical modeling.” Ocean Eng. 107 (Oct): 85–96. https://doi.org/10.1016/j.oceaneng.2015.07.037.
Liu, M., M. Yang, and H. Wang. 2014. “Bearing behavior of wide-shallow bucket foundation for offshore wind turbines in drained silty sand.” Ocean Eng. 82 (May): 169–179. https://doi.org/10.1016/j.oceaneng.2014.02.034.
Ma, H., M. Zhou, Y. Hu, and M. Shazzad Hossain. 2016. “Interpretation of layer boundaries and shear strengths for soft-stiff-soft clays using CPT data: LDFE analyses.” J. Geotech. Geoenviron. Eng. 142 (1): 04015055. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001370.
Menzies, D., and C. R. Lopez. 2011. “Four atypical jack-up rig foundation case histories.” In Proc., 13th Int. Conf. on the Jack-Up Platform: Design, Construction and Operation. London: DNV GL.
Menzies, D., and R. Roper. 2008. “Comparison of jackup rig spudcan penetration methods in clay.” In Proc., Offshore Technology Conf. Houston: OnePetro.
Mohiuddin, M. A., M. S. Hossain, Y. H. Kim, Y. Hu, and S. N. Ullah. 2022. “Insight into the behavior of a caisson anchor under cyclic loading in calcareous silt.” J. Geotech. Geoenviron. Eng. 148 (7): 04022047. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002818.
Naeini, S. A., and A. Mahdavi. 2009. “Effect of polymer on shear strength of silty sand.” EJGE 14 (Jan): 1–11.
Ragni, R., B. Bienen, C. D. O’Loughlin, S. A. Stanier, M. J. Cassidy, and N. Morgan. 2020. “Observations of the effects of a clay layer on suction bucket installation in sand.” J. Geotech. Geoenviron. Eng. 146 (5): 04020020. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002217.
Randolph, M. F., and A. R. House. 2002. “Analysis of suction caisson capacity in clay.” In Proc., Offshore Technology Conf. Houston: OnePetro.
Randolph, M. F., M. P. O’Neill, D. P. Stewart, and C. Erbrich. 1998. “Performance of suction anchors in fine-grained calcareous soils.” In Proc., Offshore Technology Conf. Houston: OnePetro.
Senders, M., and M. F. Randolph. 2009. “CPT-based method for the installation of suction caissons in sand.” J. Geotech. Geoenviron. Eng. 135 (1): 14–25. https://doi.org/10.1061/(ASCE)1090-0241(2009)135:1(14).
Supachawarote, C. 2006. Inclined load capacity of suction caisson in clay. Perth, Australia: Univ. of Western Australia.
Tapper, L. 2013. “Bearing capacity of perforated offshore foundations under combined loading.” Ph.D. thesis, Worcester College, Oxford Univ.
Tian, Y., T. Zheng, T. Zhou, and M. J. Cassidy. 2016. “A new method to investigate the failure envelopes of offshore foundations.” In Vol. 49927 of Proc., Int. Conf. on Offshore Mechanics and Arctic Engineering, V001T10A002. New York: ASME.
Tjelta, T. I. 2001. “Suction piles: Their position and application today.” In Proc., 11th Int. Offshore and Polar Engineering Conf. Houston: OnePetro.
Xia, H., M. Zhou, F. Niu, X. Zhang, and Y. Tian. 2022. “Combined bearing capacity of bucket foundations in soft-over-stiff clay.” Appl. Ocean Res. 126 (Sep): 103299. https://doi.org/10.1016/j.apor.2022.103299.
Xia, H., X. Zhou, M. Zhou, F. Niu, and X. Zhang. 2021. “Capacity of caissons in stiff-over-soft clay under combined V–HM loadings.” Ocean Eng. 229 (Jun): 109007. https://doi.org/10.1016/j.oceaneng.2021.109007.
Zhang, Y., B. Bienen, M. J. Cassidy, and S. Gourvenec. 2011. “The undrained bearing capacity of a spudcan foundation under combined loading in soft clay.” Mar. Struct. 24 (4): 459–477. https://doi.org/10.1016/j.marstruc.2011.06.002.
Zhang, Y., B. Bienen, M. J. Cassidy, and S. Gourvenec. 2012. “Undrained bearing capacity of deeply buried flat circular footings under general loading.” J. Geotech. Geoenviron. Eng. 138 (3): 385–397. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000606.
Zhao, L., C. Gaudin, C. D. O’Loughlin, J. P. Hambleton, M. J. Cassidy, and M. Herduin. 2019. “Drained capacity of a suction caisson in sand under inclined loading.” J. Geotech. Geoenviron. Eng. 145 (2): 04018107. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001996.
Zhou, M., M. S. Hossain, Y. Hu, and H. Liu. 2016. “Scale issues and interpretation of ball penetration in stratified deposits in centrifuge testing.” J. Geotech. Geoenviron. Eng. 142 (5): 04015103. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001442.
Zhu, B., W. Zhang, P. Ying, and Y. Chen. 2014. “Deflection-based bearing capacity of suction caisson foundations of offshore wind turbines.” J. Geotech. Geoenviron. Eng. 140 (5): 04014013. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001107.
Zou, X., Y. Hu, M. S. Hossain, and M. Zhou. 2018. “Capacity of skirted foundations in sand-over-clay under combined VHM loading.” Ocean Eng. 159 (Jul): 201–218. https://doi.org/10.1016/j.oceaneng.2018.04.007.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 149 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jun 2, 2022
Accepted: Jan 13, 2023
Published online: Mar 20, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 20, 2023
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- Mi Zhou, Shujin Zhou, Xihong Zhang, Yinghui Tian, Influence of Spudcan Penetration on Adjacent Skirted Foundation in Uniform Clay, Journal of Geotechnical and Geoenvironmental Engineering, 10.1061/JGGEFK.GTENG-11234, 149, 9, (2023).