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首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Centrifuge Model Study on the Effect of Lattice Leg and Sleeve on the Postconsolidation Bearing Capacity of Spudcan Foundation
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Centrifuge Model Study on the Effect of Lattice Leg and Sleeve on the Postconsolidation Bearing Capacity of Spudcan Foundation

机译：格子腿和袖子对Spudcan基础后固结承载力影响的离心模型研究

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摘要

Up to now, the postconsolidation bearing capacity enhancement of jack-up spudcan foundation has been explored using centrifuge model tests and numerical analyses, which however ignored the realistic jack-up lattice leg. This paper investigates both typical lattice leg and sleeve effects on the postconsolidation spudcan bearing capacity using centrifuge model tests, by replicating the entire process of spudcan in normally consolidated clay: "penetration-unloading-consolidation-repenetration." The experimental results show that the lattice leg and sleeve affect the spudcan bearing capacity in two sides compared with spudcan without leg. First, it increases the transient bearing capacity during initial spudcan penetration; second, less postconsolidation bearing capacity improvement is yielded by the presence of the leg. The former effect is of importance on the prediction of jack-up leg penetration, and the latter effect would suggest a lower risk of spudcan punch-through for realistic offshore jack-up rig during preloading and operation period.
机译：到目前为止，已经通过离心模型试验和数值分析探索了自举式桩基础的固结后承载力提高，但是忽略了现实的自举式支腿。本文通过离心模型试验研究了典型的晶格腿和套筒对固结后桩脚承载力的影响，方法是复制正常固结粘土中的桩脚整个过程：“穿透-卸载-固结-穿透”。实验结果表明：与没有腿的桩脚相比，花格腿和套筒在两侧影响桩脚的承载能力。首先，它增加了初始桩桩穿入期间的瞬态承载力；第二，腿的存在减少了固结后承载能力的提高。前者对预测自升式支腿的穿透力很重要，而后者则表明在预装和运营期间，对于现实的海上自升式钻机来说，穿钉罐穿通的风险较低。

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  • 来源
    《Journal of offshore mechanics and arctic engineering》 |2018年第4期|041302.1-041302.5|共5页
  • 作者

    Li Yu Ping; Yi Jiang Tao; Lee Fook Hou;

  • 作者单位

    Hohai Univ, Geotech Engn Res Inst, Key Lab, Minist Educ Geomech & Embankment Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Chongqing Univ, Sch Civil Engn, Chongqing 400450, Peoples R China;

    Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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