RESEARCH ON p-y CURVE OF PILE FOUNDATION IN CLAY BASED ON CPT DATA

Liu Jinhao; Zhang Fan; Dai Guoliang

doi:10.19912/j.0254-0096.tynxb.2021-1166

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (2) : 172-180. DOI: 10.19912/j.0254-0096.tynxb.2021-1166

RESEARCH ON p-y CURVE OF PILE FOUNDATION IN CLAY BASED ON CPT DATA

Liu Jinhao^1,2, Zhang Fan^1,2, Dai Guoliang^1,2

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Abstract

This paper uses the measured load test data of the pipe pile of Huaneng Guanyun Offshore Wind Farm to verify the applicability of the four proposed p-y curve methods for clay. The parameters of p-y curves are obtained using cone penetration tests （CPT）. The comparison results show that the traditional p-y curve will significantly underestimate the ultimate resistance of the surrounding soil due to the limitations of the original test, leading to a conservative pile design, while the hyperbolic p-y curve may overestimate the soil resistance, therefore the initial stiffness can be accurately predicted. On this basis, model ensembling is used and a new p-y curve is established by combining the traditional p-y curve model with the hyperbolic p-y curve model . Finally, a case study is used to verify the reliability of the new p-y method. This method can provide a new way to analyze the lateral loaded pile in clay.

Key words

offshore wind turbines / cone penetration tests / ensemble averages / p-y curve

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Liu Jinhao, Zhang Fan, Dai Guoliang. RESEARCH ON p-y CURVE OF PILE FOUNDATION IN CLAY BASED ON CPT DATA[J]. Acta Energiae Solaris Sinica. 2023, 44(2): 172-180 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1166

References

[1] GWEC. Global wind report2019[R]. Global Wind Energy Council (GWEC), 2020.
[2] ARAPOGIANNI A, GENACH A B.Deep water-the next step for offshore wind energy[R]. European Wind Energy Association (EWEA), 2013.
[3] ZERVOS A, KJAER C. Pure power-wind energy targets for2020 and 2030[R]. European Wind Energy Association (EWEA), 2009.
[4] HAIDERALI A, CILINGIR U, MADABHUSHI G.Lateral and axial capacity of monopiles for offshore wind turbines[J]. Indian geotechnical journal, 2013, 43(3): 181-194.
[5] LEE J H, KIM M K, KYUNG D H.Estimation of lateral load capacity of rigid short piles in sands using CPT results[J]. Journal of geotechnical & geoenvironmental engineering, 2013, 139(6): 1005-1005.
[6] 何奔. 软粘土地基单桩和复合桩基水平受荷性状[D]. 杭州: 浙江大学, 2016.
HE B.Lateral loaded characteristics of monopiles and composite piles in soft clay[D]. Hangzhou: Zhejiang University, 2016.
[7] WANG H, WANG L Z, HONG Y, et al.Quantifying the influence of pile diameter on the load transfer curves of laterally loaded monopile in sand[J]. Applied ocean research, 2020, 101: 102.
[8] BROMS B.Lateral resistance of piles in cohesionless soils[J]. ASCE soil mechanics and foundation division journal, 1964, 90(3): 123-156.
[9] PRASAD Y V S N, CHARI T R. Lateral capacity of model rigid piles in cohesionless soils[J]. Soils & foundations, 1999, 39(2): 21-29.
[10] ALEX S.Evaluation and development of CPT based pile design in Nebraska soils[D]. Lincol: University of Nebraska-Lincol, 2018.
[11] NIAZI F S, MAYNE P W.Cone penetrationtest based direct methods for evaluating static axial capacity of single piles[J]. Geotechnical and geological engineering, 2013, 31(4): 979-1009.
[12] SCHNAID F, HOULSBY G T.Assessment of chamber size effects in the calibration of in situ tests in sand[J]. International journal of rock mechanics & mining ences & geomechanics abstracts, 1992, 29(3): 437-445.
[13] LEE J H, KIM M K, KYUNG D H.Estimation of lateral load capacity of rigid short piles in sands using CPT results[J]. Journal of geotechnical & geoenvironmental engineering, 2010, 136(1): 48-56.
[14] LI H J, LIU S Y, TONG L Y, et al.Estimating p-y curves for clays by CPTU method: framework and empirical study[J]. International journal of geomechanics, 2018, 18(12): 1-10.
[15] MATLOCK H.Correlation for design of laterally loaded piles in soft clay[C]// Proceedings of the Znd. Offshore Technology Conference, OTC, Houston, Texas, USA, 1970: 577-594.
[16] CHOO Y W, KIM D. experimental development of the p-y relationship for large-diameter offshore monopiles in sands: centrifuge tests[J]. Journal of geotechnical and geoenvironmental Engineering, 2016, 142(1): 4-15.
[17] EBRAHIMIAN B, NAZARI A, PASHA A Y.Evaluating for lateral load-displacement behavior of piles in clay[J]. Ocean engineering, 2015, 96: 16-28.
[18] KIM G R, KYUNG D G, KYUNG D H, et al.CPT-based lateral displacement analysis using p-y method for offshore mono-piles in clays[J]. Geomechanics & engineering, 2014, 7(4): 459-475.
[19] REESE L C, COX W R, KOOP F D.Analysis of laterally loaded piles in sand[C]// Proceedings of the 6th Offshore Technology Conference, Richardson, TX, USA, 1974.
[20] REESE L C, COX W R, KOOP F D.Field testing and analysis of laterally loaded piles in stiff clay[C]//Proceedings of the 7th Offshore Technology Conference, Houston, Texas, USA, 1975.
[21] KONDNER R L.Hyperbolic stress-strain response: cohesive soils[J]. Journal of the soil mechanics and foundations division, 1963, 89(1): 115-143.
[22] GOH A T C, TEH C I, WONG K S. Analysis of piles subjected to embankment induced lateral soil movements[J]. Journal of geotechnical & geoenvironmrntal engineering, 1997, 123(9) : 792-801.
[23] KLINKVORT R T.Centrifuge modelling of drained lateral pile-soil response: application for offshore wind turbine support structures[D]. Copenhagen: Technical University of Denmark,2012.
[24] SHATNAWI E, LIANG R Y, NUSAIRAT J.Hyperbolic p-y criterion for cohesive soils[J]. Journal of civil engineering, 2007, 1(1): 38-47.
[25] JEONG S S, KIM Y H, KIM J Y.Influence on lateral rigidity of offshore piles using proposed p-y curves[J]. Ocean engineering, 2011, 38(2-3): 397-408.
[26] POULOS H G, HULL T S.The role of analytical geomechanics in foundation engineering[C]//Foundation Engineering:Current Principles and Practices, ASCE, New York, USA, 1989: l578-1606.
[27] 朱斌, 熊根, 刘晋超,等. 砂土中大直径单桩水平受荷离心模型试验[J]. 岩土工程学报, 2013, 35(10): 1807-1815.
ZHU B, XIONG G, LIU J C, et al.Centrifuge modelling of a large-diameter single pile under lateral loads in sand[J]. Chinese journal of geotechnical engineering, 2013,35(10): 1807-1815.