Curved Strain Wedge Analysis of Laterally Loaded Flexible Piles in Various Soil Types
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 6
Abstract
This paper establishes an approximate circular cone strain wedge model and proposes an analytical method that can effectively connect practice with theory for the behavior of laterally loaded flexible piles with both free-head and fixed-head conditions in various types of soil based on the real shape of the strain wedge. The analytical method of the curved strain wedge model, in which the Duncan-Chang model is used to describe the stress-strain relationship of the soil and the relationship between the shear strain and the horizontal strain is improved on the basis of the Mohr circle of strain, is applicable to clay and sand as well as soil. A method of calculating the shear stress along the pile is proposed for circular piles according to the friction direction between the pile and the surrounding soil. The modulus of the soil foundation reaction is calculated along the whole pile length based on the finite-difference method, without calculating the height of the strain wedge, which can truly reflect the nonlinear deformation characteristics of the pile foundation under lateral loading. The proposed method is verified by six case studies, including five field measurement experiments for various types of soil and one finite-element analysis. Comparisons show that the agreement between the results from the curved strain wedge method and those from the field tests and the finite element analysis is generally satisfactory.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request, including the data used to create Figs. 6–9 and 11–14.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51878160 and 52078128), and Six Talent Peaks Project in Jiangsu Province (Grant No. XNY-047), and the Technology Project of China Huaneng Group Co., Ltd. (Grant No. HNKJ19-H17). The authors are grateful for their support. The authors thank the Big Data Center of Southeast University for providing the facility support on the numerical calculations in this paper.
References
API (American Petroleum Institute). 2011. Geotechnical and foundation design considerations, ANSI/API recommended practice 2 GEO. 1st ed. Washington, DC: API.
Ashour, M., and G. Norris. 2000. “Modeling lateral soil-pile response based on soil-pile interaction.” J. Geotech. Geoenviron. Eng. 126 (5): 420–428. https://doi.org/10.1061/(ASCE)1090-0241(2000)126:5(420).
Ashour, M., G. Norris, and P. Pilling. 1998. “Lateral loading of a pile in layered soil using the strain wedge model.” J. Geotech. Geoenviron. Eng. 124 (4): 303–315. https://doi.org/10.1061/(ASCE)1090-0241(1998)124:4(303).
Brinkgreve, R. B. J., S. Kumarswamy, and W. M. Swolfs. 2016. PLAXIS material models manual. Delft, Netherlands: PLAXIS.
Byrne, P. M., H. Cheung, and L. Yan. 1987. “Soil parameters for deformation analysis of sand masses.” Can. Geotech. J. 24 (3): 366–376. https://doi.org/10.1139/t87-047.
Carter, D. P. 1984. A non-linear soil model for predicting lateral pile response. Auckland, New Zealand: Univ. of Auckland.
De Kuiter, J., and F. L. Beringen. 1979. “Pile foundations for large North Sea structures.” Mar. Georesour. Geotechnol. 3 (3): 267–314. https://doi.org/10.1080/10641197909379805.
DNV (Det Norske Veritas). 2011. Design of offshore wind turbine structures. Baerum, Norway: DNV.
Duncan, J. M., and C. Y. Chang. 1970. “Nonlinear analysis of stress and strain in soils.” J. Soil Mech. Found. Div. 96 (5): 1629–1653. https://doi.org/10.1061/JSFEAQ.0001458.
Dunnavant, T. W., and M. W. O’Neill. 1989. “Experimental model for submerged, stiff clay.” J. Geotech. Eng. 115 (1): 95–114. https://doi.org/10.1061/(ASCE)0733-9410(1989)115:1(95).
Fan, C. C., and J. H. Long. 2005. “Assessment of existing methods for predicting soil response of laterally loaded piles in sand.” Comput. Geotech. 32 (4): 274–289. https://doi.org/10.1016/j.compgeo.2005.02.004.
Georgiadis, M., C. Anagnostopoulos, and S. Saflekou. 1992. “Centrifuge testing of laterally loaded piles in sand.” Can. Geotech. J. 29 (2): 208–216. https://doi.org/10.1139/t92-024.
Hajialilue-Bonab, M., H. Azarnya-Shahgoli, and Y. Sojoudi. 2011. “Soil deformation pattern around laterally loaded piles.” Int. J. Phys. Modell. Geotech. 11 (3): 116–125. https://doi.org/10.1680/ijpmg.2011.11.3.116.
Hajialilue-Bonab, M., Y. Sojoudi, and A. J. Puppala. 2013. “Study of strain wedge parameters for laterally loaded piles.” Int. J. Geomech. 13 (2): 143–152. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000186.
Hearn, E. N., and L. Edgers. 2010. “Finite element analysis of an offshore wind turbine monopile.” In GeoFlorida 2010: Advances in analysis, modeling and design, 1857–1865. Reston, VA: ASCE.
Janbu, N. 1964. “Soil compressibility as determined by oedometer and triaxial tests.” In Proc., European Conf. on Soil Mechanics and Foundation Engineering (1963, Wiesbaden), 19–25. Essen, Germany: German Geotechnical Society.
Jeanjean, P. 2009. “Re-assessment of curves for soft clays from centrifuge testing and finite element modeling.” In Proc., Offshore Technology Conf., 1–23. Houston: Offshore Technology Conference. https://doi.org/10.4043/20158-MS.
Kodikara, J., A. Haque, and K. Lee. 2010. “Theoretical curves for laterally loaded single piles in undrained clay using bezier curves.” J. Geotech. Geoenviron. Eng. 136 (1): 265–268. https://doi.org/10.1061/(ASCE)1090-0241(2010)136:1(265).
Kodikara, J., K. Y. Lee, and A. Haque. 2006. “Theoretical prediction of p-y curves for laterally loaded piles in clay.” Aust. Geomech. 41 (4): 69–77.
Lin, Y., and C. Lin. 2019. “Effects of scour-hole dimensions on lateral behavior of piles in sands.” Comput. Geotech. 111 (Jul): 30–41. https://doi.org/10.1016/j.compgeo.2019.02.028.
Matlock, H. 1962. Correlations for design of laterally loaded piles in soft clay. Austin, TX: Engineering-Science Consultants.
Matlock H. 1970. “Correlation for design of laterally loaded piles in soft clay.” In Proc., 2nd Annual Offshore Technology Conf., 577–594. Houston: American Institute of Mining, Metallurgical, and Petroleum Engineers.
Matlock, H., and R. L. Tucker. 1961. Lateral load tests of an instrumented pile at Sabine, Texas. Austin, TX: Engineering-Science Consultants.
Mcclelland, B., and J. A. Focht. 1958. “Soil modulus for laterally loaded piles.” Trans. Am. Soc. Civ. Eng. 123 (1): 1049–1063. https://doi.org/10.1061/TACEAT.0007599.
Murchison, J. M., and M. W. O’Neill. 1984. “Evaluation of relationshipsin cohesionless soils.” In Analysis and design of pile foundations, 174–191. New York: ASCE.
Norris, G. M. 1986. “Theoretically based BEF laterally loaded pile analysis.” In Proc., 3rd Int. Conf. on Numerical Methods in Offshore Piling, 361–386. Paris: Editions Technip.
Pham K. D., J. Otani, Y. Watanabe, and T. Mukunoki. 2006. “Application of X-ray CT on boundary value problems in geotechnical engineering: Research on ground failure due to lateral pile loadings.” In Proc., GeoCongress 2006: Geotechnical Engineering in the Information Technology Age, edited by D. J. DeGroot, J. T. DeJong, D. Frost, and L. G. Baise, 1–6. Atlanta, GA: ASCE.
Poulos, H. G., and T. S. Hull. 1989. “Role of analytical geomechanics in foundation engineering.” In Foundation engineering: Current principles and practices, 1578–1606. Reston, VA: ASCE.
Reese, L. C., W. P. Cox, and F. D. Koop. 1974. “Analysis of laterally loaded piles in sand.” In Vol. 2 of Proc., 6th Offshore Technology Conf., 473–483. Houston: Offshore Technology Conference.
Reese, L. C., W. R. Cox, and F. D. Koop. 1975. “Field testing and analysis of laterally loaded piles in stiff clay.” In Proc., 7th Offshore Technology Conf., 672–690. Houston: Offshore Technology Conference.
Reese, L. C., and W. F. Van Impe. 2010. Single piles and pile groups under lateral loading. Leiden, Netherlands: A.A. Balkema.
Reese, L. C., and R. C. Welch. 1975. “Lateral loading of deep foundations in stiff clay.” J. Geotech. Eng. Div. 101 (7): 633–649. https://doi.org/10.1061/AJGEB6.0000177.
Scott R. F. 1980. Analysis of centrifuge pile tests: Simulation of pile driving. Washington, DC: American Petroleum Institute.
Sullivan, W. R., L. C. Reese, and C. W. Fenske. 1980. “Unified method for analysis of laterally loaded piles in clay.” In Numerical methods in offshore piling, 135–146. London: Institution of Civil Engineers.
Xu, L., F. Cai, G. Wang, and K. Ugai. 2013. “Nonlinear analysis of laterally loaded single piles in sand using modified strain wedge model.” Comput. Geotech. 51 (Jun): 60–71. https://doi.org/10.1016/j.compgeo.2013.01.003.
Yang, X., C. Zhang, M. Huang, and J. Yan. 2018. “Lateral loading of a pile using strain wedge model and its application under scouring.” Mar. Georesour. Geotechnol. 36 (3): 340–350. https://doi.org/10.1080/1064119X.2017.1317889.
Zhang, Y., K. H. Andersen, and P. Jeanjean. 2020. “Verification of a framework for cyclic p-y curves in clay by hindcast of Sabine River, SOLCYP and centrifuge laterally loaded pile tests.” Appl. Ocean Res. 97 (Apr): 102085. https://doi.org/10.1016/j.apor.2020.102085.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 6 • June 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 19, 2021
Accepted: Jan 27, 2022
Published online: Mar 26, 2022
Published in print: Jun 1, 2022
Discussion open until: Aug 26, 2022
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Cited by
- Pan Liu, Chong Jiang, Fanhuan Zeng, Analysis of laterally loaded piles in sand considering the relationship between the strain wedge model and failure wedge model, Computers and Geotechnics, 10.1016/j.compgeo.2022.105149, 154, (105149), (2023).