Abstract Aimed at the problems of bed waterlogging and track heaving in the Xuefengshan tunnel and three other tunnels on the Xiangtang-Putian railway, this paper analyzes relevant causes and proposes a treatment scheme based on the principle of "pressure reduction by water discharging, tunnel bottom reinforcement and returning of water flow to channel," showing that the track elevation returned to a normal level at the heaved section and the bed structure became stable after fine adjustments of the ballastless track with no water inside the bed or with little water left after the flow returned to the channel. Suggestions are made, including improving tunnel waterproofing and drainage designs and enhancing construction technology control and quality assurance regarding defects such as cracking and heaving of ballastless beds induced by water seepage or confined water at the tunnel bottom.
Abstract：
Aimed at the problems of bed waterlogging and track heaving in the Xuefengshan tunnel and three other tunnels on the Xiangtang-Putian railway, this paper analyzes relevant causes and proposes a treatment scheme based on the principle of "pressure reduction by water discharging, tunnel bottom reinforcement and returning of water flow to channel," showing that the track elevation returned to a normal level at the heaved section and the bed structure became stable after fine adjustments of the ballastless track with no water inside the bed or with little water left after the flow returned to the channel. Suggestions are made, including improving tunnel waterproofing and drainage designs and enhancing construction technology control and quality assurance regarding defects such as cracking and heaving of ballastless beds induced by water seepage or confined water at the tunnel bottom.
XIAO Guang-Zhi,
XUE ,
BIN
.Treatment of Bed Waterlogging and Track Heaving in Tunnels on the Xiangtang-Putian Railway[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(3): 200-204
2015, Vol. 52 