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CLC number: U25

On-line Access: 2018-05-04

Received: 2017-01-04

Revision Accepted: 2017-07-11

Crosschecked: 2018-04-11

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Zhi-hua Zhang


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Journal of Zhejiang University SCIENCE A 2018 Vol.19 No.5 P.346-366


Discrete element analysis of a cross-river tunnel under random vibration levels induced by trains operating during the flood season

Author(s):  Zhi-hua Zhang, Xie-dong Zhang, Yao Tang, Yi-fei Cui

Affiliation(s):  School of Transportation, Wuhan University of Technology, Wuhan 430063, China; more

Corresponding email(s):   zzh@whut.edu.cn

Key Words:  Discrete element method (DEM), Cross-river tunnel, Water pressure, Metro train operation, Random vibration level, Acceleration

Zhi-hua Zhang, Xie-dong Zhang, Yao Tang, Yi-fei Cui. Discrete element analysis of a cross-river tunnel under random vibration levels induced by trains operating during the flood season[J]. Journal of Zhejiang University Science A, 2018, 19(5): 346-366.

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author="Zhi-hua Zhang, Xie-dong Zhang, Yao Tang, Yi-fei Cui",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Discrete element analysis of a cross-river tunnel under random vibration levels induced by trains operating during the flood season
%A Zhi-hua Zhang
%A Xie-dong Zhang
%A Yao Tang
%A Yi-fei Cui
%J Journal of Zhejiang University SCIENCE A
%V 19
%N 5
%P 346-366
%@ 1673-565X
%D 2018
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1700002

T1 - Discrete element analysis of a cross-river tunnel under random vibration levels induced by trains operating during the flood season
A1 - Zhi-hua Zhang
A1 - Xie-dong Zhang
A1 - Yao Tang
A1 - Yi-fei Cui
J0 - Journal of Zhejiang University Science A
VL - 19
IS - 5
SP - 346
EP - 366
%@ 1673-565X
Y1 - 2018
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1700002

Floods result in many problems, which may include damage to cross-river tunnels. The cross-river tunnel, as a new style of transportation, deserves a large amount of attention. In this paper, a large-scale cross-river tunnel model is proposed based on discrete element method (DEM). Micro parameters used in the model are calibrated by proposing a triaxial numerical model. Different in situ strata, high water pressures of normal flood-water levels and random vibration levels induced by running trains are taken into account to evaluate the dynamic characteristics of a high-stress tunnel in deformation and stress analysis. The results show that the upper half of the tunnel, including the concrete lining and the surroundings, is at higher risk than the lower half. Vibration waves transferring into the surroundings undergo an amplification process. The particles of the surroundings at the vault of the tunnel separate and move downward and then reassemble during the dynamic vibrations. The vibration levels, represented by particle accelerations, are lower under flood conditions than those under normal conditions. As train speed increases, the acceleration of the track and particles in the foundation increases, accompanied by a decrease in deformation.

This paper considers the problematic issues in railway engineering, namely, to evaluate the structure damage induced by vibrations during train passing. The paper is timely and clearly written, and includes valuable analysis of measured data and model predictions. The model development is comprehensive, and the results are presented clearly with a detailed commentary. The conclusions are clear and a valuable contribution to the subject.


方法:采用离散元方法进行数值仿真。1. 基于室内三轴试验和离散元数值拟合得到土层的各细观参数;2. 采用不同接触模型对隧道内钢轨、轨枕、管片以及周边岩土体进行建模;3. 将地铁随机振动荷载施加在钢轨上,对管片及周边岩土体不同区域内颗粒的受力及变形进行监测并分析。
结论:1. 位于隧道上半部分的周边岩土体颗粒振动偏大;2. 随着距离的增大,振动波在周边岩土体内先放大后减小;3. 汛期水位条件下地铁行车荷载对管片和周边岩土体的振动影响较小,但是对隧道变形影响较大。


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


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