TY - JOUR
T1 - Lateral resistance of polyurethane-reinforced ballast with the application of new bonding schemes
T2 - Laboratory tests and discrete element simulations
AU - Jing, Guoqing
AU - Zhang, Xu
AU - Jia, Wenli
N1 - Accepted Author Manuscript
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - Ballast
KW - Discrete element method
KW - High-speed railway
KW - Lateral resistance
KW - Polyurethane
KW - Single sleeper pull-out test
UR - http://www.scopus.com/inward/record.url?scp=85067397893&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2019.06.114
DO - 10.1016/j.conbuildmat.2019.06.114
M3 - Article
AN - SCOPUS:85067397893
SN - 0950-0618
VL - 221
SP - 627
EP - 636
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -