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Oblique pullout capacity of a single drilled pile in sandy grains cemented by methane hydrates: DEM analyses

机译:甲烷水合物胶结的沙粒中单个钻孔桩的斜拉力:DEM分析

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摘要

This study investigates the oblique capacity of a drilled pile embedded in a marine ground containing methane hydrates using the distinct element method. Results indicate that the presence of methane hydrates significantly enhances the uplift and lateral capacity of the pile. The peak shaft resistance of the pile decreases with the decrease of the inclination angle of pile displacement due to de-bonding, while the residual shaft resistance increases as a result of increasing lateral earth pressure mobilized at large pile displacement. The uplift component of the oblique forces has detrimental effect on the lateral capacity of the pile. The oblique capacity of the pile can be empirically correlated to the inclination angle of the displacement of the pile head.
机译:这项研究使用独特元素法研究了嵌在含甲烷水合物的海相地面中的钻桩的斜向承载力。结果表明,甲烷水合物的存在显着增强了桩的隆起和侧向承载力。桩的峰值竖井阻力随着解粘引起的桩位移的倾斜角的减小而减小,而残余的竖井阻力由于在大桩位移下动员的侧向土压力的增加而增加。倾斜力的上升分量对桩的侧向承载力有不利影响。桩的倾斜能力可以根据经验与桩头的位移的倾斜角相关。

著录项

  • 来源
  • 会议地点 Paris(FR)
  • 作者

    Fang LIU; Mingjing JIANG;

  • 作者单位

    Department of Geotechnical Engineering, Tongji University, Shanghai, China State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China Key Laboratory of Geotechnical and Underground Engineering (Tongji University), Ministry of Education, Shanghai, China;

    Department of Geotechnical Engineering, Tongji University, Shanghai, China State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China Key Laboratory of Geotechnical and Underground Engineering (Tongji University), Ministry of Education, Shanghai, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    oblique uplift capacity of a drilled pile; DEM analyses; marine soil; stabilization by methane hydrate;

    机译:钻孔桩的斜升能力; DEM分析;海洋土壤甲烷水合物稳定;

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