摘要
导管架平台在海上石油与天然气开发过程中起着重大作用,桩基结构作为支撑平台整体重量并承受外部风浪流等环境载荷的最终受体,确定其合理的嵌固深度对于平台的安全稳定分析具有重要意义.本文采用Ansys有限元软件建立典型的四桩腿导管架模型,应用非线性winkler地基梁模型模拟桩土相互作用,探究桩径D与粘土层粘聚力C对嵌固深度的影响.研究表明:嵌固深度与桩径D和粘聚力C均呈负相关关系.根据计算结果提出了导管架平台桩基的嵌固深度与桩径D和粘聚力C之间的拟合公式,这些成果可为确定平台桩基的合理嵌固深度提供理论依据.
Jacket platform is an important structure during the exploration of offshore oil and gas. The reasonable bulk-in depth of a pile foundation is meaningful to the security of a platform, since the piles support the weight of the platform and withstand the environmental load. This article built a classical jacket platform model with Ansys software. This article uses nonlinear Winkler mode to simulate pilesoil interaction and to study the influence of the pile diameter D and cohesive force C to the built-in depth of the piles. The results show that the built-in depth has a negative correlation with cohesive force and pile diameter. In addition, this article proposes the fitting formula among them, which would be used to decide the built-in depth of the piles.
出处
《天津理工大学学报》
2015年第3期22-26,共5页
Journal of Tianjin University of Technology
基金
国家自然科学基金(51379145
51239008)
国家科技重大专项资助项目(2011ZX05027-005)
