自升式平台地基承载力,抗倾稳性及桩腿插深分析

由于地质原因的不明，自升式平台桩腿突然刺破持力层而导致平台桩腿及结构破坏的事故时有发生．自升式平台作业时桩腿的地基承载力及抗倾稳性，对保证平台在各种海况下的作业安全是非常重要的．通过对某一自升式平台地基承载力及抗倾稳性的分析计算，探讨了平台抗倾稳性与海底土层地基承载力及桩腿插深之间的关系．对今后该类平台的设计具有一定的参考价值．

Analysis of Stability Against Overturning and Foundation Bear Force for Jack-Up Rig

Sdden additional leg penetrations (punching through) have often occurred over the past few years in different parts of the world, especially with independent leg footings. Some cases of punch through caused substantial damages to the leg structure. Therefore, it is important to determine the foundation bear force and stability against overturning of the jack-up rig, which is the basic condition for safe operation of the rig. In this paper the foundation bear force and stability against overturning of the jack-up rig are calculated and analyzed. The relationships between foundation bear force, stability against overturning and penetration depth of the pile are also discussed. This research can serve as useful references, for rig design.