自升式平台桩靴/地基承载力的数值分析

桩靴/地基承载力的准确预报是确保自升式平台进行海上插桩作业安全性的重要前提,常规的规范算法在处理复杂地基条件时存在困难。基于非线性数值分析方法,在对加载点位置、网格尺寸、地基边界等关键技术进行研究的基础上,以某400ft水深自升式平台为例,分别对海底均质土和成层土的承载力进行了研究。同时,对各土层参数的影响进行了详细分析,为探索插桩过程中地基破坏原理和承载力计算提供了一些参考。

Numerical Analysis of Bearing Capacity of Soil and Spudcan for Jack-up Unit

The accurate prediction of bearing capacity of soil and spudcan plays an important role in structure safety for jack-up in operating condition. However, it is difficult to calculate its bearing capacity of complex soil state by rules. In this paper, non-linear numerical analysis method is used, and some key technology such as loading point, mesh size and foundation boundary is studied. On this basis, taking a 400ft jack-up as example, the bearing capacity of homogeneous soil and layered soil is detailedly analyzed with the consideration of soil parameters, which is helpful to the research of foundation destroy theory and bearing capacity in operating process for jack-up unit.