砂土中海上风力机吸力式桩桶基础的p-y曲线研究

doi:doi:10.19912/j.0254-0096.tynxb.2024-0712

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砂土中海上风力机吸力式桩桶基础的p-y曲线研究

更新时间：2025-10-22

- 砂土中海上风力机吸力式桩桶基础的p-y曲线研究
- Vol. 46, Issue 9, Pages: 26-33(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0712
  CLC： TU473
- Published Online：14 October 2025，
  
  Published：2025
- 稿件说明：
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[J]. 2025, 46(9): 26-33.
DOI：

[J]. 2025, 46(9): 26-33. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0712.

摘要

海上风力机吸力式桩桶基础得到了广泛应用。首先依据实测试桩资料对有限元软件ABAQUS进行模型的有效性验证;然后建立砂土中4~9 m桩径的吸力式桩桶基础的有限元模型

分析其在不同水平荷载作用下的桩身弯矩和位移响应;最后在双曲线p-y曲线模型的基础之上

考虑土体深度和桩径尺寸的影响对初始地基反力模量和极限土反力计算方法进行修正

提出合适的p-y曲线模型。结果表明

砂土中的吸力式桩桶基础在水平荷载作用下主要呈转动模式

且伴随有少许的平动

桩身弯矩值沿土深方向先增大后减小

且水平荷载大小的变化对桩身弯矩最大值所在位置基本无影响

API法p-y曲线高估了初始地基反力模量

低估了极限土反力

不适用于对其进行计算分析

而修正p-y曲线模型与数模结果之间的吻合性较好。

Abstract

Offshore wind turbine suction pile foundation has been widely used. As known as suction bucket foundations

they are large concrete or steel barrel structures

closed at the top

open at the bottom

and equipped with a pumping/drainage port at the top. Firstly

the validity of the model is verified by the finite element software ABAQUS based on the data of actual test piles; then the finite element model of suction pile barrel foundation with pile diameter of 4-9 m in sandy soil is established to analyze the bending moments and displacement responses of the pile body under different horizontal loads; finally

on the basis of the hyperbolic curve model

the initial foundation reaction modulus and ultimate soil reaction force calculation method are corrected by considering the effects of soil depth and pile diameter size

and a suitable curve model is proposed. The results show that the suction pile barrel foundation in sandy soil mainly shows rotation mode under horizontal load

and accompanied by a little bit of translation

the value of the pile bending moment increases and then decreases along the soil depth direction

and the change of the horizontal load size basically has no effect on the location of the maximum value of the pile bending moment

the API method curve overestimates the initial foundation reaction modulus and underestimates the ultimate soil reaction force

which is not suitable for its calculation and analysis

while the agreement between the modified curve model and the results of the numerical modeling is better.

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references

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