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

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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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  -