海上风电筒型基础砂土中沉放临界吸力研究

翟汉波; 宋国炜; 王泰; 庞雅博; 张林洋; 张浦阳

doi:10.19912/j.0254-0096.tynxb.2024-2374

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海上风电筒型基础砂土中沉放临界吸力研究

更新时间：2026-07-21

- 海上风电筒型基础砂土中沉放临界吸力研究
- Vol. 47, Issue 5, Pages: 288-297(2026)
- 作者机构：
- 作者简介：
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- DOI：10.19912/j.0254-0096.tynxb.2024-2374
  CLC： TK89
- Online First：04 June 2026，
  
  Published：2026
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翟汉波, 宋国炜, 王泰, et al. 海上风电筒型基础砂土中沉放临界吸力研究[J]. 2026, 47(5): 288-297.
DOI：

翟汉波, 宋国炜, 王泰, et al. 海上风电筒型基础砂土中沉放临界吸力研究[J]. 2026, 47(5): 288-297. DOI： 10.19912/j.0254-0096.tynxb.2024-2374.

摘要

首先通过模型试验

探讨筒体内土体渗流对吸力的影响

并建立一个连接临界吸力与下沉深度的数学模型

深入分析单筒基础在不同下沉深度时所需的最小临界吸力。接着

在单筒基础研究成果的基础上

进一步开展四筒基础沉贯阻力的测试与分析工作。研究发现

随着筒型基础的下沉

其内部土体会经历一个吸力衰减的过程

且这种衰减程度与下沉深度之间存在线性关系。在整个下沉过程中

筒形结构将持续遭受吸力损失。基于上述观察结果

构建水力梯度与入土深度之间的关系模型

并推导出内外渗透系数比值随下沉深度变化的数学表达式。最后

通过对四筒基础进行吸力沉放试验

提出一种新的计算方法来确定筒型基础的临界最小吸力

并通过试验证明该方法的有效性。

Abstract

The effect of soil seepage in the bucket on suction was first explored through model tests

and a mathematical model connecting critical suction and penetration depth was establishcd

and the minimum critical suction required for a single bucket foundation at different penetration depths was analyzed in depth. Then

based on the research results of the single bucket foundation

the test and analysis of the penetration resistance of the four-bucket foundation were further carried out. The study found that as the bucket foundation penetrates

the soil inside it will experience a suction attenuation process

and there is a linear relationship between the degree of attenuation and the penetration depth. During the entire penetration process

the bucket structure will continue to suffer from suction loss. Based on the above observations

a relationship model between hydraulic gradient and soil penetration depth was constructed

and a mathematical expression for the ratio of internal and external permeability coefficients with penetration depth was derived. Finally

a new calculation method was proposed to determine the critical minimum suction of the bucket foundation through penetration experiments on the four-bucket foundation

and the effectiveness of the method was verified experimentally. These findings have important guiding significance for optimizing the design and construction of bucket foundations under sandy conditions.

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references

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