岩土工程学报2025，Vol.47Issue(11)：2274-2284,11.DOI:10.11779/CJGE20230502
水平方向桶土相互作用土弹簧构建及优化研究
Research on optimization of p-y spring model applied in bucket foundation-soil interaction along horizontal direction
摘要
Abstract
As a new type of marine foundation,bucket foundation has been increasingly applied in the offshore wind turbine engineering.Its stable service performance is closely related to the interaction between bucket foundation and marine soil.In order to evaluate the undrained horizontal bucket foundation-soil interaction efficiently and accurately,a modified p-y spring method is proposed,based on the conventional p-y spring method for pile foundation.The three-dimensional finite element analyses are compared with the p-y curve recommended by API standard,and the p-factor and y-factor are introduced as double correction parameters.In addition,a parametric analysis is also carried out on common single-layer and layered clay geological conditions in the ocean,varying the soil shear stiffness coefficient Gmax/su,failure shear strain pfγ and other factors.The NGI-ADP soil model is used to effectively represent the nonlinearity property of soil.It is found that the y-factor can be significantly affected by multi-layer soil.The p-factor is generally within the range between 1.38 and 2.08.Furthermore,the modified p-y spring method has shown good adaptability to the actual project site conditions based on an application case study.And for some working conditions the application of the modified p-y spring method also extends to consider the bucket foundation-soil interaction under multiple degrees of freedom.关键词
桶形基础/桶土相互作用/p-y曲线/NGI-ADP模型Key words
bucket foundation/bucket foundation-soil interaction/p-y curve/NGI-ADP model分类
土木建筑引用本文复制引用
闫玥,赵康,沈泽荣,付登锋,闫澍旺..水平方向桶土相互作用土弹簧构建及优化研究[J].岩土工程学报,2025,47(11):2274-2284,11.基金项目
国家自然科学基金项目(42177122,52271290)This work was supported by National Natural Science Foundation of China(Grant Nos.42177122,52271290). （42177122,52271290）
