| 李效民，徐璐，李福恒，姚雪祥，殷文明，苗得胜.不同长径比单桩在粉土中的p⁃y模型研究[J].海洋工程,2025,(5):61~69 |
| 不同长径比单桩在粉土中的p⁃y模型研究 |
| Study on p⁃y model of monopiles with different length-diameter ratio in silt |
| 投稿时间：2024-08-01 修订日期：2024-10-09 |
| DOI：10.16483/j.issn.1005-9865.2025.05.006 |
| 中文关键词: 单桩 粉土 不同长径比 p⁃y模型 海上风电 桩-土相互作用 |
| 英文关键词:monopiles silt different length-diameter ratio p⁃y model offshore wind power pile-soil interaction |
| 基金项目:国家自然科学基金项目（51979257）；中央高校基本科研业务费专项项目（202413018）；山东省博士后项目（SDCX-ZG-202400218）；青岛市博士后项目（QDBSH20240101013） |
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| 中文摘要: |
| 单桩是海上风电工程中最常用的基础形式，桩-土相互作用关系是桩基设计中需要重点考虑的因素。现有设计规范中的推荐公式适用于砂土和黏土这两种极端土质。然而，在全球范围内广泛分布着兼具砂土和黏土特性（非零内聚力和非零摩擦角）的过渡土质——粉土。若仅考虑单一土质特性，可能会造成桩基设计的不经济性和不可靠性。此外，传统的p?y模型主要针对单一长径比的桩基，而对于长径比动态变化的通用p?y模型研究尚不足。基于ABAQUS软件建立了单桩-粉土相互作用的有限元模型，分析并提出了粉土水平极限承载力计算公式，同时考虑长径比参数变化的影响，量化了水平极限承载力和单桩长径比对单桩横向荷载-位移响应的作用，进而提出了适应于不同长径比单桩在粉土中的p?y模型。最后，通过桩基算例的对比分析，验证了所提模型的准确性与适用性。 |
| 英文摘要: |
| Monopiles are the most commonly used foundation type in offshore wind power, and pile-soil interaction is a key factor in pile foundation design. The recommended formulas in existing design specifications apply only to the two extreme soil types—sand and clay. However, transition soils with both sandy and clay-like properties (non-zero cohesion and non-zero friction angle)—silty soils—are widely distributed worldwide. Considering only a single property may lead to uneconomical and unreliable pile foundation designs. In addition, conventional p?y models are developed for monopiles with a single length-diameter ratio, while studies on generalized p?y models that account for varying length-diameter ratios are limited. In this study, a finite element model of monopile-soil interaction is established using ABAQUS. A calculation formula for the horizontal ultimate bearing capacity of silty soil is derived, while the influence of varying length-diameter ratios parameters are also considered, the influence of horizontal ultimate bearing capacity and monopile lengh-diameter ratios on the lateral load-displacement response of monopiles is quantified , furthermore, a p?y model for monopiles with different length-diameter ratios in silty soil is proposed. Finally, the model's accuracy and applicability are verified through comparative analysis of pile foundation cases. |
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