基于极限分析下限定理的成层地基筒基竖向承载力研究

尚景宏; 杨文灯; 杨佳成; 刘润; 杨灿

doi:doi:10.19912/j.0254-0096.tynxb.2024-0985

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基于极限分析下限定理的成层地基筒基竖向承载力研究

更新时间：2025-12-17

- 基于极限分析下限定理的成层地基筒基竖向承载力研究
- Issue 10, Pages: 628-634(2025)
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0985
  CLC： U43
- Published Online：31 October 2025，
  
  Published：31 October 2025
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尚景宏, 杨文灯, 杨佳成, et al. 基于极限分析下限定理的成层地基筒基竖向承载力研究[J]. 2025, (10): 628-634.
DOI：

尚景宏, 杨文灯, 杨佳成, et al. 基于极限分析下限定理的成层地基筒基竖向承载力研究[J]. 2025, (10): 628-634. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0985.

摘要

筒型基础在海洋成层土地基中的竖向极限承载力计算

目前仍缺乏完善的理论与成熟方法

该领域的研究尚待系统化。研究实现成层地基筒型基础竖向承载力下限解的程序化求解

并完成下限解的有效验证

旨在揭示成层土地基中筒型基础的承载特性。结果表明：地基极限承载力随砂土层相对厚度（H/D）、黏土层不排水抗剪强度（su）、砂土内摩擦角（φ）及筒型基础长径比（d/D）的增大而单调递增。同时

砂土临界厚度（Hcri）受上下土层强度交互影响：其值随上覆砂土φ值增大而增加

但随下卧黏土su值减小而增大。

Abstract

Bucket foundation has become one of the important foundation forms for offshore wind power in China due to its advantages of low cost

short construction period

and relatively small disturbance to the foundation. There is still a lack of strict theoretical solutions and comprehensive calculation methods for the vertical ultimate bearing capacity of bucket foundations in layered soil foundations. This article uses the finite element limit analysis method to establish a lower bound solution program for the vertical bearing capacity of bucket foundations in layered foundations and verify its accuracy. Conduct in-depth research on the failure mode and bearing characteristics of bucket foundations in layered soil foundations. The results indicate that the ultimate bearing capacity of the foundation is related to the relative thickness of the sand layer

the clay layer

and the sand layer There is a positive correlation between the length to diameter ratio of the bucket foundation. The critical thickness of sand varies with the upper layer of sand and increases with the decveast of the mderlying clay .

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