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中文摘要：
对砂土的小直径桩实测p-y（水平抗力-水平位移）曲线进行分析计算。分析桩土参数对实Np—Y曲线的影响，并选用合理的标准化参数对各P-Y曲线进行归一化，选用双曲线拟合归一化曲线。分析目前土体极限抗力的研究成果，选取合理的双曲线模型参数。由双曲线模型推得大直径（4～6m）单桩的实Np—Y曲线，通过软件ABAQUS和SACS对实例进行对比分析，证明双曲线模型以及参数选取的有效性及适用性。由双曲线模型得到的大直径P—Y曲线形式简单，同时计算过程较简化。通过参数的选取，可充分考虑桩径和施工效应等因素的影响，普适性较好，可广泛用于工程中水平受载海上风电基础大直径桩的P—y曲线分析。
英文摘要：
Calculation on measured sand p-y curves. The soil and pile parameters in p-y curves were analyzed, reasonable standard parameters were selected to normalize p-y curves, and the hyperbolic model was chosen to fit normalized curves. By summarizing the current studies on the ultimate resistance of the soil, selecting appropriate parameters of the hyperholic model. The hyperbolic model was used to obtain the measured sand p-y curve of monopile with a diameter of 4-6 m, then using the finite element analysis software of ABAQUS and SACS to analyze examples. Through the comparative analysis of examples, the validity and applicability of the hyperbolic model were proved. The large-diameter pile p-y curve derived from the hyperbolic model is simple. Through selecting parameters, considering the pile diameter, construction and other factors, hyperbolic model could be used in the p-y analysis of laterally loaded large-diameter piles in sand in practice.
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