CLC number: U213.11
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2016-09-12
Cited: 1
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Citations: Bibtex RefMan EndNote GB/T7714
Han-jiang Lai, Jun-jie Zheng, Rong-jun Zhang, Ming-juan Cui. Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation[J]. Journal of Zhejiang University Science A, 2016, 17(10): 803-817.
@article{title="Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation",
author="Han-jiang Lai, Jun-jie Zheng, Rong-jun Zhang, Ming-juan Cui",
journal="Journal of Zhejiang University Science A",
volume="17",
number="10",
pages="803-817",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500302"
}
%0 Journal Article
%T Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation
%A Han-jiang Lai
%A Jun-jie Zheng
%A Rong-jun Zhang
%A Ming-juan Cui
%J Journal of Zhejiang University SCIENCE A
%V 17
%N 10
%P 803-817
%@ 1673-565X
%D 2016
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500302
TY - JOUR
T1 - Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation
A1 - Han-jiang Lai
A1 - Jun-jie Zheng
A1 - Rong-jun Zhang
A1 - Ming-juan Cui
J0 - Journal of Zhejiang University Science A
VL - 17
IS - 10
SP - 803
EP - 817
%@ 1673-565X
Y1 - 2016
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1500302
Abstract: piled embankments are widely used in highway and railway engineering due to their economy and efficiency in overcoming several issues encountered in constructing embankments over weak soils. soil arching, caused by the pile-subsoil relative displacement (Δs), plays an important role in reducing the embankment load falling on weak soil, however, the fundamental characteristics (e.g., formation and features) of soil arching remain poorly understood. In this study, a series of discrete element method (DEM) modellings are performed to study the formation and features of soil arching with the variation of Δs in piled embankments with or without geosynthetic reinforcement. Firstly, calibration for the modelling parameters is carried out by comparing the DEM results with the experimental data obtained from the existing literature. Secondly, the analysis of the macro- and micro-behaviours is performed in detail. Finally, a parametric study is conducted in an effort to identify the influences of three key factors on soil arching: the friction coefficient of the embankment fill (f), the embankment height (h), and the pile clear spacing (s−a). Numerical results indicate that Δs is a key factor governing the formation and features of soil arching in embankments. To be specific, soil arching gradually evolves from two inclined shear planes at a small Δs to a hemispherical arch at a relatively large Δs. Then, with a continuous increase in Δs, the soil arching height gradually increases and finally approaches a constant value of 0.8(s−a) (i.e., the maximum soil arching height). For a given case, the higher the soil arching height, the greater the degree of soil arching effect. The parametric study shows that the friction coefficient of the embankment fill has a negligible influence on the formation and features of soil arching. However, embankment height is a key factor governing the formation and features of soil arching. In addition, pile clear spacing has a significant effect on the formation of soil arching, but not on its features.
This is an interesting numerical study to further explore the mechanisms of soil arching in piled embankments. The findings from this study are valuable to current knowledge in this application.
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