Set Up and Resulting Punch-Through Risk of Jack-Up Spudcans during Installation
Set Up and Resulting Punch-Through Risk of Jack-Up Spudcans during Installation
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DOI：
10.1061/(asce)gt.1943-5606.0000943
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发表时间：
2013-12-01
影响因子：
3.9
通讯作者：
Cassidy, Mark Jason
中科院分区：
文献类型：
--
作者：
Bienen, Britta;Cassidy, Mark Jason
本文通过在土工离心机中进行试验，解决了三维固结问题。在一个不连续的基础安装过程中，这是典型的移动海上钻井平台，在安装过程中会遇到固结期。虽然人们承认，由于腿部迅速不受控制地渗透的风险，这可能使平台面临严重后果，但迄今为止，还没有建立任何方法来预测这种风险，从而减轻这种风险。本试验研究结果表明，固结后的峰值穿透阻力主要受固结期持续时间的影响，固结期间所承受的荷载大小也显著影响峰值后能力降低的严重程度。讨论了与现场典型自升式装置相关的不同侵彻深度下的固结和后固结行为。本研究的主要发现以无量纲图的形式总结，以方便实际应用。
This paper addresses a three-dimensional consolidation problem through experimentation in a geotechnical centrifuge. During a discontinuous footing installation, which is typical for mobile offshore drilling rigs, periods of consolidation are encountered as part of the installation process. While this is acknowledged to expose the platforms to potentially severe consequences due to the risk of rapid uncontrolled leg penetration, to date no method has been established to predict this risk and thus enable its mitigation. The findings of this experimental study show that while the peak penetration resistance postconsolidation is mainly influenced by the duration of the consolidation period, as is expected, the load magnitude held during consolidation also significantly influences the severity of capacity reduction postpeak. The consolidation and postconsolidation behavior is discussed for various penetration depths relevant to typical jack-up installations in the field. The key findings of this study are summarized in nondimensional graphs to facilitate application in practice.