Enhancing Pullout Load Capacity of Helical Anchor in Clay with Adjusted Load Application Point under Inclined Loading Condition
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 10
Abstract
In this study, the effect of load application point () on the load capacity () of helical anchors under inclined loading condition was investigated. For this purpose, coupled Eulerian-Lagrangian finite element analyses were performed for various configurations of helical anchor and load inclination angles (). The focus was on characterizing the optimum load application point that can most enhance the load capacity of helical anchors. Both inclined loading and load application point significantly affected the load capacity of the helical anchor. For the individual failure-mechanism case, the effect of on was clearly beneficial in most cases, indicating that the individual configuration is more advantageous when a taut or catenary mooring type is adopted. The load capacity of the helical anchor increased as the load application point moved from the top to certain limit depth, below which the load capacity became reversely decreased with further increasing . The optimum loading depth was found at . The effect of on the pullout capacity was mainly controlled by the horizontal load component. Based on the results of this study, design equations for the load capacity of helical anchors with load application point are proposed.
Get full access to this article
View all available purchase options and get full access to this article.
Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was conducted with the support of the National R&D Project for Smart Construction Technology (No. 22SMIP-A156488-03) funded by the Korea Agency for Infrastructure Technology Advancement under the Ministry of Land, Infrastructure and Transport, and managed by the Korea Expressway Corporation. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C201196613).
References
Ahn, J., H. Lee, and Y. T. Kim. 2015. “Finite element analysis of the holding capacity of shallow suction caisson anchors.” Mar. Georesour. Geotechnol. 33 (1): 33–44. https://doi.org/10.1080/1064119X.2013.778377.
Aubeny, C. P., S. W. Han, and J. D. Murff. 2003. “Inclined load capacity of suction caissons.” Int. J. Numer. Anal. Methods Geomech. 27 (14): 1235–1254. https://doi.org/10.1002/nag.319.
Bagheri, F., and M. H. El Naggar. 2015. “Effects of installation disturbance on behavior of multi-helix piles in structured clays.” DFI J. 9 (2): 80–91. https://doi.org/10.1179/1937525515Y.0000000008.
Byrne, B. W., and G. T. Houlsby. 2015. “Helical piles: An innovative foundation design option for offshore wind turbines.” Philos. Trans. R. Soc. London, Ser. A 373 (2035): 20140081. https://doi.org/10.1098/rsta.2014.0081.
Cortes-Garcia, L. D., M. E. Landon, A. P. Gallant, and K. D. Huguenard. 2019. “Assessment of helical anchor capacity in marine clays for aquaculture applications.” In Proc., Geo-Congress 2019: Foundations, 299–307. Reston, VA: ASCE.
Harnish, J., and M. H. El Naggar. 2017. “Large-diameter helical pile capacity–torque correlations.” Can. Geotech. J. 54 (7): 968–986. https://doi.org/10.1139/cgj-2016-0156.
Hossain, M. S., M. F. Randolph, Y. Hu, and D. J. White. 2006. “Cavity stability and bearing capacity of spudcan foundations on clay.” In Proc., Offshore Technology Conf. Texas: Society of Petroleum Engineers.
Jeong, H. 2012. “Comparison of geotechnical characteristic between the west and south shore areas.” M.S. thesis, School of Architecture, Civil and Environmental Engineering, Korea Univ.
Kim, Y. H., and M. S. Hossain. 2016. “Numerical study on pull-out capacity of torpedo anchors in clay.” Géotech. Lett. 6 (4): 275–282. https://doi.org/10.1680/jgele.16.00106.
Kwon, O., J. Lee, G. Kim, I. Kim, and J. Lee. 2019. “Investigation of pullout load capacity for helical anchors subjected to inclined loading conditions using coupled Eulerian-Lagrangian analyses.” Comput. Geotech. 111 (5): 66–75. https://doi.org/10.1016/j.compgeo.2019.03.007.
Lee, J., O. Kwon, I. Kim, G. Kim, and J. Lee. 2019. “Cyclic pullout behavior of helical anchors for offshore floating structures under inclined loading condition.” Appl. Ocean Res. 92 (56): 101937. https://doi.org/10.1016/j.apor.2019.101937.
Lutenegger, A. J. 2009. “Cylindrical shear or plate bearing?—Uplift behavior of multi-helix screw anchors in clay.” Contemp. Topics Deep Found. 41021 (335): 57. https://doi.org/10.1061/.
Lutenegger, A. J., J. Erikson, and N. Williams. 2014. “Evaluating installation disturbance of helical anchors in clay from field vane tests.” In Proc., 39th Annual Conf. on Deep Foundations, 129–138. Hawthorne, NJ: Deep Foundation Institute.
Lutenegger, A. J., and C. D. H. Tsuha. 2015. “Evaluating installation disturbance from helical piles and anchors using compression and tension tests.” In Proc., 15th Pan-American Conf. on Soil Mechanics and Geotechnical Engineering, 373–381. Washington, DC: IOS Press.
Merifield, R. S. 2011. “Ultimate uplift capacity of multiplate helical type anchors in clay.” J. Geotech. Geoenviron. Eng. 137 (7): 704–716. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000478.
Merifield, R. S., and C. C. Smith. 2010. “The ultimate uplift capacity of multi-plate strip anchors in undrained clay.” Comput. Geotech. 37 (4): 504–514. https://doi.org/10.1016/j.compgeo.2010.02.004.
Mitsch, M. P., and S. P. Clemence. 1985. Uplift capacity of helix anchors in sand, 26–47. Reston, VA: ASCE.
Na, S., I. Jang, M. Oh, and O. Kwon. 2013. “Numerical simulation of pullout behavior of embedded suction anchors in clay.” In Proc., 7th Int. Conf. on Asian and Pacific Coasts, 860–865. Bali: Hasanuddin University Press.
Prasad, Y. V. S. N., and S. N. Rao. 1994. “Pullout behaviour of model pile and helical pile anchors subjected to lateral cyclic loading.” Can. Geotech. J. 31 (1): 110–119. https://doi.org/10.1139/t94-012.
Prasad, Y. V. S. N., and S. N. Rao. 1996. “Lateral capacity of helical piles in clays.” J. Geotech. Eng. 122 (11): 938–941. https://doi.org/10.1061/(ASCE)0733-9410(1996)122:11(938).
Rao, S. N., Y. V. S. N. Prasad, and M. D. Shetty. 1991. “The behaviour of model screw piles in cohesive soils.” Soils Found. 31 (2): 35–50. https://doi.org/10.3208/sandf1972.31.2_35.
Rao, S. N., Y. V. S. N. Prasad, and C. Veeresh. 1993. “Behaviour of embedded model screw anchors in soft clays.” Geotechnique 43 (4): 605–614. https://doi.org/10.1680/geot.1993.43.4.605.
Sakr, M. 2010. “Lateral resistance of high capacity helical piles: Case study.” In Proc., 63rd Canadian Geotechnical and 6th Canadian Permafrost Conf., 402–412. Alliston: Canadian Geotechnical Society.
Schiavon, J. A., C. D. H. C. Tsuha, and L. Thorel. 2016. “Scale effect in centrifuge tests of helical anchors in sand.” Int. J. Phys. Model. 16 (4): 185–196. https://doi.org/10.1680/jphmg.15.00047.
Seider, G. L., and J. B. Chisholm. 2012. “Lateral capacity of helical piles–actual vs. theoretical foundations for solar power plants.” In Proc., GeoCongress 2012: State of the Art and Practice in Geotechnology Engineering, 315–325. Reston, VA: ASCE.
Sharif, Y., M. Brown, M. Ciantia, B. Cerfontaine, C. Davidson, J. Knappett, and J. D. Ball. 2021. “Using DEM to assess the influence of single helix screw pile geometry on the installation requirements and in-service axial capacity in dense sand.” In Proc., Institution of Civil Engineers: Geotechnical Engineering. London: Institution of Civil Engineers.
Spagnoli, G., and K. Gavin. 2015. “Helical piles as a novel foundation system for offshore piled facilities.” In Proc., Abu Dhabi Int. Petroleum Exhibition and Conf. Texas: Society of Petroleum Engineers.
Spagnoli, G., and C. D. H. C. Tsuha. 2020. “Review of torque models for offshore helical piles.” In Proc., E3S Web of Conf., 12007. Les Ulis, France: EDP Sciences.
Tian, Y., C. Gaudin, M. F. Randolph, and M. J. Cassidy. 2015. “Influence of padeye offset on bearing capacity of three-dimensional plate anchors.” Can. Geotech. J. 52 (6): 682–693. https://doi.org/10.1139/cgj-2014-0120.
Wang, D., Y. Hu, and M. F. Randolph. 2010. “Three-dimensional large deformation finite-element analysis of plate anchors in uniform clay.” J. Geotech. Geoenviron. Eng. 136 (2): 355–365. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000210.
Wang, D., R. S. Merifield, and C. Gaudin. 2013. “Uplift behaviour of helical anchors in clay.” Can. Geotech. J. 50 (6): 575–584. https://doi.org/10.1139/cgj-2012-0350.
Zhu, S. 2015. “Optimization of Padeye Position for Deepwater Suction Anchor under Inclined loading.” J. Model. Opt. 7 (2): 64–69.
Information & Authors
Information
Published In
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Aug 6, 2021
Accepted: May 12, 2022
Published online: Jul 20, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 20, 2022
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.