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Journal of Zhejiang University-SCIENCE A

, Volume 20, Issue 11, pp 838–851 | Cite as

Experimental and theoretical studies of laterally loaded single piles in slopes

  • Ming-hui Yang
  • Bo DengEmail author
  • Ming-hua Zhao
Article
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  • 34 Downloads

Abstract

In this study, a series of small-scale laboratory model tests and numerical simulations was performed to investigate the lateral behavior of a single pile embedded in slopes and in horizontal ground. In the model tests, small-scale model piles were fitted with strain gauges around their surface at various depths, while the lateral deflections at the pile head were measured by dial gauges. A total of four sets of model pile tests was conducted with piles installed in model slopes of 0°, 30°, 45°, and 60°. The changes in pile head deflections and their bending moments with changes in pile location and the embedded length of the piles were analyzed by the finite element method (FEM). Subsequently, a new p-y curve (p denotes the soil resistance and y denotes the pile deflection) for a steep clay slope was developed based on those finite element analysis results, taking into account the influences of the declination of the slope and the position of the pile in the slope. The numerical results agree very well with those from a scale model pile load test and other full-scale pile load tests reported in the literature.

Keywords

Pile foundation Slope Model test Finite element method (FEM) Lateral load p-y curve 

边坡中单桩横向受力的试验与理论研究

概要

目的:研究边坡段基桩的水平承载特性,以期指导工程 实践。

创新点:提出一种新的p-y 曲线,以考虑边坡坡角和桩在 边坡中位置的影响。

方法:1. 针对平地桩基和坡地桩基两种工况开展两组室 内模型对比试验;2. 采用ABAQUS 建立数值模 型,并研究桩径、桩长和土体的弹性模量对桩基 水平受荷性能的影响;3. 对室内模型试验结果和 数值模拟结果进行对比分析,并得出坡地桩基的 p-y 曲线。

结论:1. 边坡中侧向受力桩的侧向挠度和弯矩沿桩长的 分布与水平埋置桩的分布相似;然而,边坡倾角 对单桩的侧向荷载特性有着重要的影响;在相同 的荷载条件下,较高的倾斜角度会引起较大的桩 身变形和弯矩。2. 对于埋置长度不变的桩,桩的 极限侧向承载力与坡趾距桩截面中心的距离近 似呈双线性关系。3. 对于埋置长度不同的桩,其 极限承载力随坡脚至桩截面中心距离的增加呈 线性增加。

关键词

桩基 边坡 模型试验 有限元 水平荷载 p-y 曲线 
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Notes

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Copyright information

© Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Civil EngineeringHunan UniversityChangshaChina

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