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Effect of Local and Global Scour on Lateral Response of Single Piles in Different Soil Conditions

机译：局部和整体冲刷对不同土壤条件下单桩横向响应的影响

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摘要

Marine structures, offshore platforms and bridge piers are usually supported on foundation piles. These piles are subjected to lateral loading due to wind, waves and currents. Piles installed in marine or river environments are susceptible to scour depending on wave and current characteristics and soil types. In this paper, the effect of local and global scour on behavior of laterally loaded piles installed in different soil conditions has been investigated. Finite element model (FEM) using the software program PLAXIS and Winkler model using the software program LPILE were used in the analyses. Different parameters were investigated such as soil types, scour depth, scour hole dimension, pile material, submerged condition, magnitude of lateral load and load eccentricity. The results showed that scour has a significant impact on piles installed in sand and a less significant impact on piles installed in clay. Global scour has a significant impact on pile lateral displacement and bending stresses. The effect of scour is more significant if piles are subjected to large lateral loads due to the nonlinear response of pile-soil system. Effect of scour of stiff clayey soils on piles is more pronounced than that of soft clayey soils.
机译：海洋结构，海上平台和桥墩通常支撑在基础桩上。这些桩由于风，浪和流而承受横向载荷。安装在海洋或河流环境中的桩容易受到冲刷，这取决于波浪和电流特征以及土壤类型。本文研究了局部和整体冲刷对安装在不同土壤条件下的侧向荷载桩行为的影响。分析中使用了使用PLAXIS软件的有限元模型（FEM）和使用LPILE软件的Winkler模型。研究了不同的参数，例如土壤类型，冲刷深度，冲刷孔尺寸，桩材料，淹没条件，侧向荷载大小和荷载偏心率。结果表明，冲刷对安装在沙子中的桩有显着影响，而对安装在粘土中的桩的影响较小。整体冲刷对桩的横向位移和弯曲应力有重大影响。如果桩由于桩土系统的非线性响应而承受较大的侧向载荷，则冲刷的影响会更大。硬质粘土的冲刷对桩的影响比软质粘土的冲刷更为明显。

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  • 来源
    《Engineering》 |2012年第6期|p.297-306|共10页
  • 作者

    Yasser E. Mostafa;

  • 作者单位

    Department of Irrigation and Hydraulics, Faculty of Engineering, Ain Shams University, Cairo, Egypt;

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

    piles; lateral loading; scour; sand; clay;

    机译：堆横向载荷;冲刷;砂;粘土;

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