ABSTRACT

As the permanent submarine support structures for subsea wells, pipeline manifolds and pipeline terminations, the mudmat foundation works under obviously complex, nonlinear and uncertain loading, which makes a great challenge for the research of the stability of mudmat foundation. In this paper, finite element method is utilised to investigate the behaviour of square mudmat foundation without embedment in NC clay to fully 3D loading conditions: V-H-M and V-H-T. According to the analysis results, the relevant failure envelop surfaces and formulas are proposed to predict the capacity of mudmat foundation. These results could be treated as reference for the design work of the mudmat foundation.

摘要

泥垫地基作为海底井、管汇和管道终端的永久性海底支撑结构，工作在明显复杂、非线性和不确定的载荷下，这对泥垫地基稳定性的研究提出了巨大的挑战。在本文中，利用有限元方法研究了无嵌入 NC 粘土的方形泥垫地基在全 3D 加载条件下的行为：V - H - M和V - H - T. 根据分析结果，提出相关的破坏包络面和公式来预测泥垫地基的承载力。这些结果可作为泥垫基础设计工作的参考。