基于PIV技术与分形理论的桩–土系统水平循环受荷模型试验研究

doi:10.13722/j.cnki.jrme.2022.0598

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Abstract As one of the common forms of foundations for the wind turbine，monopile is often subjected to cyclic lateral loading，which can lead to changes in the dynamic response of the pile-soil system. In order to investigate the internal force variation and the cumulative deformation characteristics of the monopile，a series of model tests were carried out by varying two parameters：the relative density and the particle size of the soil. And the movement law of the soil around the pile under cyclic loading was analysed by the PIV technique and fractal theory. The test results showed that：(1) The influence of cyclic loading on the bending moment of the pile was relatively significant. With the increase of the number of cycles，the magnitude of the bending moment reduced，and the amplitude rose with the increase of the relative density of the soil. In addition，the smaller the particle size of the soil around the pile，the larger the bending moment. (2) The monopile rotated rigidly around a point. The amount of cumulative deformation of the pile decreased with the increase in the relative density. The interfacial friction angle of the sand-steel contact surface was affected by the particle size of the soil. The larger the particle size，the smaller the interfacial friction angle and the larger the lateral cumulative displacement of the pile. (3) The displacement range of the surface soil decreased with the increase in the relative density of the soil，and the particle size had less influence on the displacement field. As the loading progressed，the displacement range of the soil behind the pile increased，while the displacement range of the soil in front of the pile decreased，and convective movement occurred in part of the soil along the loading direction. (4) The displacement field of the soil around the pile exhibited fractal characteristics，and the fractal dimension value decreased with the increase in the relative density of the soil，varying between 1.18 and 1.42. The fractal dimension showed a positive linear relationship with the area of the soil displacement field and an exponential function with the number of cycles. Four sets of fitting formulas were proposed，and the results fit well with the existing data. The results of this research can provide an experimental basis for exploring the stability evaluation of the pile-soil system under lateral cyclic loading.

Key words： pile foundation cyclic loading pile soil interaction PIV technique fractal theory model experiment

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	Articles by authors
	YUAN Bingxiang1
	LI Zhijie1
	CHEN Weijie1
	LUO Qingzi1
	YANG Guanghua2
	WANG Yonghong3

Cite this article:

YUAN Bingxiang1,LI Zhijie1,CHEN Weijie1, et al. Experimental study on lateral cyclic loading model of pile-soil system based on PIV technique and fractal theory [J]. , 2023, 42(2): 466-482.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0598 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I2/466

[2]	WANG X F，ZENG X W，YANG X L，et al. Feasibility study of offshore wind turbines with hybrid monopile foundation based on centrifuge modeling[J]. Applied Energy，2018，209：127–139.
[3]	LIU M M，YANG M，WANG H J. Bearing behavior of wide-shallow bucket foundation for offshore wind turbines in drained silty sand[J]. Ocean Engineering，2014，82：169–179.
[6]	梁发云，李彦初，黄茂松. 基于Pasternak双参数地基模型水平桩简化分析方法[J]. 岩土工程学报，2013，35(增1)：300–304.(LIANG Fayun，LI Yanchu，HUANG Maosong. Simplified method for laterally loaded piles based on Pasternak double-parameter spring model for foundations[J]. Chinese Journal of Geotechnical Engineering，2013，35(Supp.1)：300–304.(in Chinese))
[8]	BROWN D A，MORRISON C，REESE L C. Lateral load behavior of pile group in sand[J]. Journal of Geotechnical Engineering，1988，114(11)：1 261–1 276.
[10]	LI J L，GUAN D W，CHIEW Y M，et al. Temporal evolution of soil deformations around monopile foundations subjected to cyclic lateral loading[J]. Ocean Engineering，2020，217：107893.
[11]	STANIER S A，BLABER J，TAKE W A，et al. Improved image-based deformation measurement for geotechnical applications[J]. Canadian Geotechnical Journal，2016，53(5)：727–739.
[4]	DOHERTY P，GAVIN K. Laterally loaded monopile design for offshore wind farms[J]. Proceedings of the Institution of Civil Engineers-Energy，2012，165(1)：7–17.
[12]	WHITE D J，TAKE W A，BOLTON M D. Soil deformation measurement using particle image velocimetry(PIV) and photogrammetry[J]. Geotechnique，2003，53(7)：619–631.
[14]	马小峰，邹亚荣，刘善伟. 基于分形维数理论的海岸线遥感分类与变迁研究[J]. 海洋开发与管理，2015，32(1)：30–33.(MA Xiaofeng，ZOU Yarong，LIU Shanwei. A study on remote sensing classification and variation of coastline based on fractal dimension theory[J]. Ocean Development and Management，2015，32(1)：30–33.(in Chinese))
[16]	CARPINETI M，ROSSONI A，SENESE A，et al. Multifractal analysis of glaciers in the Lombardy region of the Italian Alps[J]. Journal of Physics-Complexity，2021，2(2)：025003.
[18]	SAHITYA K S，PRASAD C S R K. Fractal modelling of an urban road network using Geographical Information Systems(GIS)[J]. World Review of Intermodal Transportation Research，2020，9(4)：376–392.
[20]	张志镇，高峰，高亚楠，等. 高温影响下花岗岩孔径分布的分形结构及模型[J]. 岩石力学与工程学报，2016，35(12)：2 426–2 438. (ZHANG Zhizhen，GAO Feng，GAO Yanan，et al. Fractal structure and model of pore size distribution of granite under high temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(12)：2 426–2 438.(in Chinese))
[22]	QIN N，YE F，HE B A，et al. Model study on backfill grouting in shield tunnels based on fractal theory[J]. European Journal of Environmental and Civil Engineering，2022，26(12)：5 901–5 911.
[24]	竺明星，尹倩，龚维明，等. 基于Akima插值理论的水平试桩数据处理方法研究[J]. 岩土工程学报，2020，42(增1)：80–84.(ZHU Mingxing，YIN Qian，GONG Weiming，et al. Data processing method for laterally loaded trial piles based on Akima interpolation theory[J]. Chinese Journal of Geotechnical Engineering，2020，42(Supp.1)：80–84.(in Chinese))
[26]	袁炳祥，吴跃东，陈锐，等. 侧向受荷桩周土体内部位移场的模型试验研究[J]. 浙江大学学报：工学版，2016，50(10)：2 031–2 036. (YUAN Bingxiang，WU Yuedong，CHEN Rui，et al. Model tests on displacement field of internal soil induced by laterally loaded piles[J]. Journal of Zhejiang University：Engineering Science，2016，50(10)：2 031–2 036.(in Chinese))
[28]	袁炳祥，樊立韬，李志杰，等. 层状地基中水平受荷桩–土相互作用试验研究[J]. 中国公路学报，2022，35(11)：62–72.(YUAN Bingxiang，FAN Litao，LI Zhijie，et al. Experimental study on pile-soil interaction under horizontal load in layered foundation[J]. China Journal of Highway and Transport，2022，35(11)：62–72.(in Chinese))
[30]	李庆桐，黄宏伟. 基于数字图像的盾构隧道衬砌裂缝病害诊断[J].岩石力学与工程学报，2020，39(8)：1 658–1 670.(LI Qingtong，HUANG Hongwei. Diagnosis of structural cracks of shield tunnel lining based on digital images[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(8)：1 658–1 670.(in Chinese))
[32]	SALGADO R，BANDINI P，KARIM A. Shear strength and stiffness of silty sand[J]. Journal of Geotechnical and Geoenvironmental Engineering，2000，126(8)：763–764.
[34]	WANG C Y，LIU H L，DING X M，et al. Study on horizontal bearing characteristics of pile foundations in coral sand[J]. Canadian Geotechnical Journal，2021，58(12)：1 928–1 942.
[36]	WANG Y，ZHU M X，GONG W M，et al. Lateral behavior of monopiles considering the effects of sand subsidence and densification under lateral cyclic loading[J/OL]. Marine Georesources and Geotechnology，https://doi.org/10.1080/1064119X.2021.2002985，2021–11–15.
[1]	VAN DER MALE P，VERJASSOLA M，VAN DALEN K N. Decoupled modelling approaches for environmental interactions with monopile-based offshore wind support structures[J]. Energies，2020，13(19)：5 195.
[9]	CUéLLAR P，GEORGI S，BAE?LER M，et al. On the quasi-static granular convective flow and sand densification around pile foundations under cyclic lateral loading[J]. Granular Matter，2012，14(1)：11–25.
[17]	陈彦光. 分形城市与城市规划[J]. 城市规划，2005，(2)：33–40.(CHEN Yanguang. Fractal cities and urban planning[J]. City Planning Review，2005，(2)：33–40.(in Chinese))
[25]	YUN W C，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)：04015058.
[33]	GOUDARZY M，KONIG D，SCHANZ T. Small strain stiffness of granular materials containing fines[J]. Soils and Foundations，2016，56(5)：756–764.
[41]	LI J L，GUAN D W，CHIEW Y M，et al. Temporal evolution of soil deformations around monopile foundations subjected to cyclic lateral loading[J]. Ocean Engineering，2020，217：107893.
[7]	竺明星，卢红前，戴国亮，等. 基于侧阻硬化与软化模型的大直径桩基水平承载力研究[J]. 岩土工程学报，2018，40(增2)：132–136. (ZHU Mingxing，LU Hongqian，DAI Guoliang，et al. Lateral bearing capacity of large-diameter pile foundation based on hardening and softening models of side resistance[J]. Chinese Journal of Geotechnical Engineering，2018，40(Supp.2)：132–136.(in Chinese))
[15]	CLEMENZI I，PELLICCIOTTI F，BURLANDO P. Snow depth structure，fractal behavior，and interannual consistency over haut Glacier d'Arolla Switzerland[J]. Water Resources Research，2018，54(10)：7 929–7 945.
[23]	ZHANG Y，ZHONG X Y，LIN J S，et al. Effects of fractal dimension and water content on the shear strength of red soil in the hilly granitic region of Southern China[J]. Geomorphology，2020，36：106956.
[31]	FRICK D，ACHMUS M. An experimental study on the parameters affecting the cyclic lateral response of monopiles for offshore wind turbines in sand[J]. Soils and Foundations，2020，60(6)：1 570–1 587.
[39]	HONG Y，HE B，WANG L Z，et al. Cyclic lateral response and failure mechanisms of semi-rigid pile in soft clay：centrifuge tests and numerical modelling[J]. Canadian Geotechnical Journal，2017，54(6)：806–824.
[38]	张勋，黄茂松，胡志平. 砂土中单桩水平循环累积变形特性模型试验[J]. 岩土力学，2019，40(3)：933–941.(ZHANG Xun，HUANG Maosong，HU Zhiping. Model tests on cumulative deformation characteristics of a single pile subjected to lateral cyclic loading in sand[J]. Rock and Soil Mechanics，2019，40(3)：933–941.(in Chinese))
[40]	MCNAMARA S，GARCIA-ROJO R，HERRMANN H J. Microscopic origin of granular ratcheting[J]. Physical Review E，2008，77(3)：031304.
[5]	袁炳祥，陈锐，杨雪强，等. 基于渗水力加荷对侧向受荷桩的试验研究[J]. 岩石力学与工程学报，2016，35(增2)：4 295–4 301. (YUAN Bingxiang，CHEN Rui，YANG Xueqiang，et al. Investigation of laterally loaded pile based on the hydraulic gradient model test[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.2)：4 295–4 301.(in Chinese))
[13]	曹兆虎，孔纲强，刘汉龙，等. 基于PIV技术的沉桩过程土体位移场模型试验研究[J]. 工程力学，2014，31(8)：168–174.(CAO Zhaohu，KONG Gangqiang，LIU Hanlong，et al. Model test on deformation characteristic of pile driving in sand using PIV technique[J]. Engineering Mechanics，2014，31(8)：168–174.(in Chinese))
[21]	曾寅，刘建锋，周志威，等. 盐岩单轴蠕变声发射特征及损伤演化研究[J]. 岩土力学，2019，40(1)：207–215.(ZENG Yin，LIU Jianfeng，ZHOU Zhiwei，et al. Creep acoustic emission and damage evolution of salt rock under uniaxial compression[J]. Rock and Soil Mechanics，2019，40(1)：207–215.(in Chinese))
[29]	丁自伟，李小菲，唐青豹，等. 砂岩颗粒孔隙分布分形特征与强度相关性研究[J]. 岩石力学与工程学报，2020，39(9)：1 787–1 796. (DING Ziwei，LI Xiaofei，TANG Qingbao，et al. Study on correlation between fractal characteristics of pore distribution and strength of sandstone particles[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(9)：1 787–1 796.(in Chinese))
[37]	HAN F，GANJU E，SALGADO R，et al. Effects of interface roughness，particle geometry，and gradation on the sand-steel interface friction angle[J]. Journal of Geotechnical and Geoenvironmental Engineering，2018，144(12)：04018096.
[19]	WANG B，XU Z F，LI C，et al. Hydrodynamic characteristics of forced oscillation of heave plate with fractal characteristics based on floating wind turbine platform[J]. Ocean Engineering，2020，212：107621.
[27]	刘振亚，刘建坤，李旭，等. PIV技术在非饱和冻土冻胀模型试验中的实现与灰度相关性分析[J]. 岩土工程学报，2018，40(2)：313–320.(LIU Zhenya，LIU Jiankun，LI Xu，et al. Application of PIV in model tests on frozen unsaturated soils and grayscale correlation analysis[J]. Chinese Journal of Geotechnical Engineering，2018，40(2)：313–320.(in Chinese))
[35]	LUO R P，YANG M，LI W C，et al. Numerical study of diameter effect on accumulated deformation of laterally loaded monopiles in sand[J]. European Journal of Environmental and Civil Engineering，2020，24(14)：2 440–2 452.
[43]	NARSILIO G A，SANTAMARINA J C. Terminal densities[J]. Geotechnique，2008，58(8)：669–674.
[42]	PASTEN C，SHIN H，SANTAMARINA J C. Long-term foundation response to repetitive loading[J]. Journal of Geotechnical and Geoenvironmental Engineering，2014，140(4)：0001052.