1.中国电建集团华东勘测设计研究院有限公司;2.浙江大学 海洋学院 浙江 舟山
1.Hydro-china Huadong Engineering Co,LTD,Hangzhou;2.Zhejiang University Ocean College Zhoushan
自升式稳桩平台被广泛应用于海上风电工程单桩基础沉桩施工。因此,开展自升式稳桩平台桩基竖向承载特性研究对平台的安全作业具有重要意义。采用有限元软件ABAQUS中的CEL数值模拟方法,分析江苏启东海域某自升式稳桩平台桩基承载特性,得到以下结论：(1)CEL数值模拟方法可以有效模拟桩腿贯入地层全过程,揭示桩腿贯入过程中土体密度演化规律；(1)CEL数值模拟和《海洋井场调查规范》所得的桩基承载力特征曲线基本一致；(3)推荐桩基安全贯入深度为10 m,位于土层②-2,粉质粘土层,此时理论和数值分析所得的桩基承载力都为4.0 MN。研究成果可为江苏启东海域自升式稳桩平台的安全作业提供理论支持。
Jack-up pile stabilizing platform is widely used in single pile foundation sinking construction of offshore wind power engineering. Therefore, it is of great significance to carry out research on vertical bearing characteristics of jack-up pile stabilized platform for safe operation of platform. The CEL numerical simulation method in the finite element software ABAQUS was used to analyze the bearing characteristics of a jack-up pile stable platform in the qidong sea area of jiangsu province. The following conclusions were drawn :(1) CEL numerical simulation method can effectively simulate the whole process of pile penetration into the stratum, and reveal the soil density evolution law in the process of pile penetration; (1) CEL numerical simulation is basically consistent with the characteristic curve of pile bearing capacity obtained in The Code for Marine Well Site Investigation; (3) It is recommended that the safe penetration depth of pile foundation is 10 m, which is located in soil layer ②-2 and silty clay layer. In this case, the pile foundation bearing capacity obtained by theoretical and numerical analysis is 4.0 MN. The research results can provide theoretical support for the safe operation of jack-up pile stabilization platform in Qidong Sea area, Jiangsu Province.