STUDY ON CALCULATION METHOD OF LONG-TERM SETTLEMENT OF OFFSHORE WIND TURBINE BUCKET FOUNDATION CONSIDERING SOIL CREEP

Kou Hailei; Zhang Hongrui; Lu Jiaqing; Wang Yansheng; An Zhaotun

doi:10.19912/j.0254-0096.tynxb.2024-1664

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 692-700. DOI: 10.19912/j.0254-0096.tynxb.2024-1664

STUDY ON CALCULATION METHOD OF LONG-TERM SETTLEMENT OF OFFSHORE WIND TURBINE BUCKET FOUNDATION CONSIDERING SOIL CREEP

Kou Hailei, Zhang Hongrui, Lu Jiaqing, Wang Yansheng, An Zhaotun

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Abstract

Based on the existing theoretical studies related to clay creep and foundation load transfer, this paper proposed a new calculation method for prediction of long-term settlement and cumulative inclination of conduit rack barrel foundation in clay during service. The method is able to more accurately predict the settlement of foundations by fully considering the soil creep that occurs during the various stages of settlement during the service life of offshore wind turbines. The numerical model was established by soft creep soil constitutive model in finite element software PLAXIS, and the numerical simulation results were compared with the theoretical calculations. The results show that the calculation method is able to accurately predict the vertical settlement of single-barrel foundations with different L/D and the settlement and cumulative inclination of conduit rack barrel foundations with different S/D in clayey soils, with the relative error within 10%. The development and change rules of the settlement and cumulative inclination of the barrel foundation under different conditions are summarised, and the reasonableness of the new method for the prediction of the whole settlement process is analysed.

Key words

offshore wind power / bucket foundation / clay / long-term settlement / cumulative inclination / numerical simulation

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Kou Hailei, Zhang Hongrui, Lu Jiaqing, Wang Yansheng, An Zhaotun. STUDY ON CALCULATION METHOD OF LONG-TERM SETTLEMENT OF OFFSHORE WIND TURBINE BUCKET FOUNDATION CONSIDERING SOIL CREEP[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 692-700 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1664

References

[1] DNVGL-ST-0126, Support structures for wind turbines[S].
[2] NB/T 10105—2018, 海上风电场工程风电机组基础设计规范[S]. NB/T 10105—2018, Code for design of wind turbine foundations for offshore wind power projects[S].
[3] ZHANG Y R, SUN L Q, FENG X W, et al.The consolidation response of skirted foundations in normally consolidated clay[J]. Ocean engineering, 2024, 296: 117064.
[4] GOURVENEC S, RANDOLPH M F.Consolidation beneath circular skirted foundations[J]. International journal of geomechanics, 2010, 10(1): 22-29.
[5] ZHU B, KONG D Q, CHEN R P, et al.Installation and lateral loading tests of suction caissons in silt[J]. Canadian geotechnical journal, 2011, 48(7): 1070-1084.
[6] 贾沼霖, 李新义, 练继建, 等. 遗留桩坑对临近复合筒型基础倾斜率的影响[J]. 太阳能学报, 2022, 43(11): 166-171.JIA Z L, LI X Y, LIAN J J, et al. Effect of residual pile pit on inclination of adjacent composite bucket foundation[J]. Acta energiae solaris sinica, 2022, 43(11): 166-171.
[7] 朱斌, 孔德琼, 童建国, 等. 粉土中吸力式桶形基础沉贯及抗拔特性试验研究[J]. 岩土工程学报, 2011, 33(7): 1045-1053.ZHU B, KONG D Q, TONG J G, et al. Model tests on penetration and pullout of suction caissons in silt[J]. Chinese journal of geotechnical engineering, 2011, 33(7): 1045-1053.
[8] 李大勇, 张雨坤, 高玉峰, 等. 中粗砂中吸力锚的负压沉贯模型试验研究[J]. 岩土工程学报, 2012, 34(12): 2277-2283.LI D Y, ZHANG Y K, GAO Y F, et al. Model tests on penetration of suction anchors in medium-coarse sand[J]. Chinese journal of geotechnical engineering, 2012, 34(12): 2277-2283.
[9] 陈飞, 练继建, 马煜祥, 等. 粉砂中筒型基础沉贯过程筒-土作用机理试验研究[J]. 岩土工程学报, 2015, 37(4): 683-691.CHEN F, LIAN J J, MA Y X, et al. Model tests on bucket-soil interaction during installation of bucket foundation in silt sand[J]. Chinese journal of geotechnical engineering, 2015, 37(4): 683-691.
[10] 汪明元, 陆佳清, 巴盼锋, 等. 软黏土中吸力式三桶基础承载特性分析[J]. 太阳能学报, 2024, 45(6): 589-598.WANG M Y, LU J Q, BA P F, et al. Analysis of bearing characteristic of tripod suction bucket foundation in soft clay[J]. Acta energiae solaris sinica, 2024, 45(6): 589-598.
[11] YIN J H, FENG W Q.A new simplified method and its verification for calculation of consolidation settlement of a clayey soil with creep[J]. Canadian geotechnical journal, 2017, 54(3): 333-347.
[12] FENG W Q, YIN J H, CHEN W B, et al.A new simplified method for calculating consolidation settlement of multi-layer soft soils with creep under multi-stage ramp loading[J]. Engineering geology, 2020, 264: 105322.
[13] WANG Z F, CHENG W C, WANG Y Q, et al.Simple method to predict settlement of composite foundation under embankment[J]. International journal of geomechanics, 2018, 18(12): 04018158.
[14] ALZABEEBEE S.Application of EPR-MOGA in computing the liquefaction-induced settlement of a building subjected to seismic shake[J]. Engineering with computers, 2022, 38(1): 437-448.
[15] 刘寒鹏. 天津滨海新区高层建筑荷载作用下地面沉降研究[D]. 西安: 长安大学, 2010.LIU H P. The study on the land subsidence with the affect of high-rise buildings in Tianjin Binhai new area[D]. Xi’an: Changan University, 2010.
[16] BIENEN B, GAUDIN C, CASSIDY M J, et al.Numerical modelling of a hybrid skirted foundation under combined loading[J]. Computers and geotechnics, 2012, 45: 127-139.
[17] HUNG L C, KIM S R.Evaluation of vertical and horizontal bearing capacities of bucket foundations in clay[J]. Ocean engineering, 2012, 52: 75-82.
[18] 曹政, 李智, 江琦, 等. 复合加载下海上风电四筒基础地基承载力特性研究[J]. 太阳能学报, 2024, 45(1): 210-217.CAO Z, LI Z, JIANG Q, et al. Bearing capacity characteristics of four-bucket foundation in offshore wind turbines under combined loading conditions[J]. Acta energiae solaris sinica, 2024, 45(1): 210-217.
[19] LIU D, LIU B, ZHANG Y, et al. Long-term settlement of suction bucket foundations supporting offshore wind turbines[C]//The 30^th (2020) International Ocean and Polar Engineering Conference (ISOPE). Shanghai, China, 2020.
[20] 寇海磊, 房伟伟, 徐祥程, 等. 基于HSS模型海上风电桶形基础水平循环承载特性对比研究[J]. 海洋工程, 2024, 42(4): 1-12.KOU H L, FANG W W, XU X C, et al. Comparative study on horizontal cyclic bearing characteristics of offshore wind turbine bucket foundations based on HSS model[J]. The ocean engineering, 2024, 42(4): 1-12.
[21] BRINKGREVE R B J, KUMARSWAMY S, SWOLFS W M. Plaxis material models manual[D]. Delft: Delft University of Technology, 2006.
[22] YIN Z Y, TENG J C, LI Z, et al.Modelling of suction bucket foundation in clay: from finite element analyses to macro-elements[J]. Ocean engineering, 2020, 210: 107577.
[23] 柳涛, 秦梦飞, 施伟. 基于离心机实验的海上风力机大直径单桩桩土作用研究[J]. 太阳能学报, 2024, 45(8): 537-545.LIU T, QIN M F, SHI W. Soil-structure interaction analysis of large-diameter monopile of offshore wind turbine based on centrifugal model test[J]. Acta energiae solaris sinica, 2024, 45(8): 537-545.
[24] LIU Z Y, XUE J F.The deformation behaviour of an anisotropically consolidated Kaolin clay under lateral cyclic loading[J]. Marine georesources & geotechnology, 2022, 40(12): 1446-1452.
[25] ZHANG X X, KOU H L, AN Z, et al.Dynamic behavior of Kaolin clay under bidirectional cyclic loading for suction bucket foundation[J]. Ocean engineering, 2024, 312: 119188.
[26] ZHANG Y R, FAN S T, LI S, et al.Numerical analysis of the post-installation consolidated response of skirted foundations[J]. Computers and geotechnics, 2024, 166: 105931.