TY - JOUR
T1 - Settlement behaviour of hybrid asphalt-ballast railway tracks
AU - Yu, Zelong
AU - Connolly, David P.
AU - Woodward, Peter Keith
AU - Laghrouche, Omar
PY - 2019/5/30
Y1 - 2019/5/30
N2 - The use of structural asphalt layers inside ballasted railway tracks is attractive because it can increase track bending stiffness. Therefore, for the first time, this paper investigates the long-term settlement characteristics of asphaltic track in the presence of a subgrade stiffness transition zone. Phased load cyclic compression laboratory tests are performed on a large-scale hybrid asphalt-ballast track, supported by subgrade with varying stiffness. It is found that an asphaltic layer acts as a bridge to shield the subgrade from high stresses. It is also found that the asphalt reduces track settlement, and is particularly effective when subgrade stiffness is low.
AB - The use of structural asphalt layers inside ballasted railway tracks is attractive because it can increase track bending stiffness. Therefore, for the first time, this paper investigates the long-term settlement characteristics of asphaltic track in the presence of a subgrade stiffness transition zone. Phased load cyclic compression laboratory tests are performed on a large-scale hybrid asphalt-ballast track, supported by subgrade with varying stiffness. It is found that an asphaltic layer acts as a bridge to shield the subgrade from high stresses. It is also found that the asphalt reduces track settlement, and is particularly effective when subgrade stiffness is low.
UR - https://www.scopus.com/pages/publications/85063024362
U2 - 10.1016/j.conbuildmat.2019.03.047
DO - 10.1016/j.conbuildmat.2019.03.047
M3 - Article
SN - 0950-0618
VL - 208
SP - 808
EP - 817
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -