Lateral resistance of polyurethane-reinforced ballast with the application of new bonding schemes: Laboratory tests and discrete element simulations

Jing, Guoqing; Zhang, Xu; Jia, W.

doi:10.1016/j.conbuildmat.2019.06.114

Lateral resistance of polyurethane-reinforced ballast with the application of new bonding schemes

Title

Lateral resistance of polyurethane-reinforced ballast with the application of new bonding schemes: Laboratory tests and discrete element simulations

Author

Jing, Guoqing (Beijing Jiaotong University)
Zhang, Xu (Guangdong University of Technology)
Jia, W. (TU Delft Railway Engineering)

Date

2019

Abstract

To mitigate the ballast flight risk in the high-speed railway, this paper presents three new polyurethane bonding schemes which have negligible influence to tamping operations. With the application of these bonding schemes, a series of laboratory tests indicated that the polyurethane-reinforced ballast exhibited much larger lateral resistance than the ordinary ballast by 31% at least. Discrete element simulation results further demonstrated that the polyurethane improved the load-bearing capacity of the ballast at the particle scale through effectively restraining the particle movement. Therefore, the proposed bonding schemes ensure adequate lateral ballast resistance and are effective measures for improving the ballast performance.

Subject

Ballast
Discrete element method
High-speed railway
Lateral resistance
Polyurethane
Single sleeper pull-out test

To reference this document use:

http://resolver.tudelft.nl/uuid:6d07caff-c0b8-4358-8478-af2f7ced5b19

DOI

https://doi.org/10.1016/j.conbuildmat.2019.06.114

Embargo date

2021-06-20

ISSN

0950-0618

Source

Construction and Building Materials, 221, 627-636