自升式平台桩腿与岩土互作用研究进展

摘要

To ensure the jack-up can operate safely, it is essential to research the soil-structure interaction during spudcan penetrating in clays or pulling up,and when the platform working normally or self-surviving in storm,and to calculate the bearing capacity,resisting sliding capacity,resisting capsizing capacity, and pulling resistance. By analyzing the conventional calculating method,FEM,and testing method being used to research the interaction between soil and structure of jack up,the disadvantage of these research was put forward. On the base,the finite analyzing method of interaction between multi-spudcan and soil,which fully take into account the key structure of main body of platform, was the effective means to study the leg penetrating,pulling up, resisting sliding and capsizing capacity, dynamics characteristics.%为保证自升式平台能够安全工作,设计自升式平台时必须要确定平台在工作海域的桩腿承载能力、抗滑移能力、抗倾覆能力和拔桩阻力.对平台插桩、拔桩、正常工作、风暴自存等工况时桩腿与海底岩土的相互作用机理进行了研究,分析了国内外在研究自升式平台桩腿与岩土互作用时采用的常规计算方法、有限元法和试验法,并指出了现有方法存在的缺陷,提出采用有限元法分析时充分考虑平台主体关键结构的多桩腿-岩土互作用,是研究平台的插桩、拔桩、抗滑移和抗倾覆能力以及平台动态特性的有效手段.