Full Text:   <251>

Summary:  <87>

CLC number: TU473.1

On-line Access: 2019-11-08

Received: 2019-07-11

Revision Accepted: 2019-10-17

Crosschecked: 2019-10-23

Cited: 0

Clicked: 351

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Ming-hui Yang

https://orcid.org/0000-0002-0773-4061

Bo Deng

https://orcid.org/0000-0002-4679-1165

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Journal of Zhejiang University SCIENCE A 2019 Vol.20 No.11 P.838-851

10.1631/jzus.A1900318


Experimental and theoretical studies of laterally loaded single piles in slopes


Author(s):  Ming-hui Yang, Bo Deng, Ming-hua Zhao

Affiliation(s):  College of Civil Engineering, Hunan University, Changsha 410082, China

Corresponding email(s):   parl_d@126.com

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


Ming-hui Yang, Bo Deng, Ming-hua Zhao. Experimental and theoretical studies of laterally loaded single piles in slopes[J]. Journal of Zhejiang University Science A, 2019, 20(11): 838-851.

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doi="10.1631/jzus.A1900318"
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%T Experimental and theoretical studies of laterally loaded single piles in slopes
%A Ming-hui Yang
%A Bo Deng
%A Ming-hua Zhao
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1900318

TY - JOUR
T1 - Experimental and theoretical studies of laterally loaded single piles in slopes
A1 - Ming-hui Yang
A1 - Bo Deng
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J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1900318


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.

The manuscript presents an interesting study aimed to develop a p-y curves model that takes into account effects of pile locations in slopes. The manuscript is overall well.

边坡中单桩横向受力的试验与理论研究

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

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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