Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering

Influence of subgrade defects on vibrational characteristics of ballastless track subgrade of high-speed railway

Authors
Qiyun Wang, Hongbin Zeng, Tingwei Jiang
Corresponding Author
Qiyun Wang
Available Online April 2016.
DOI
10.2991/icseee-15.2016.1How to use a DOI?
Keywords
high-speed railway; subgrade defect; dynamic response; distribution law
Abstract

In order to analyze influence of subgrade defects on the dynamic characteristics of ballastless track subgrade, a three-dimensional finite element model of the CRTSâ…¡ ballastless slab track subgrade was establisbed, vertical vibrational displacement and acceleration of sugrade were calculated in consideration of conventional condition and defective subgrade,such as uncompacted filling and differential settlement of sugrade, and its spacial distribution characteristics of the subgrade were discussed. It is observed that the rate of change of dynamic response amplitude of ballastless track-subgrade is less than 10% because of uncompacted filling on partial space,and the defective space will expand. The dynamic response amplitude and distribution of subgrade is obviously affected by the separation between subgrade and ballastless track for differential settlement of sugrade, thereinto vertical acceleration increases more than 2 times and create greatly negative impact on subgrade.

Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
Series
Advances in Engineering Research
Publication Date
April 2016
ISBN
978-94-6252-164-3
ISSN
2352-5401
DOI
10.2991/icseee-15.2016.1How to use a DOI?
Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Qiyun Wang
AU  - Hongbin Zeng
AU  - Tingwei Jiang
PY  - 2016/04
DA  - 2016/04
TI  - Influence of subgrade defects on vibrational characteristics of ballastless track subgrade of high-speed railway
BT  - Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 1
EP  - 7
SN  - 2352-5401
UR  - https://doi.org/10.2991/icseee-15.2016.1
DO  - 10.2991/icseee-15.2016.1
ID  - Wang2016/04
ER  -