| 摘要 |
PROBLEM TO BE SOLVED: To prevent subsidence of a rail, by preventing water from jetting from a ballast layer for installing a sleeper and the rail, with a simple constitution, without an environmental load.SOLUTION: Crushed stones 12 are laid all over on the ground 11, and a ballast layer 13 is formed. Sleepers 14 are laid in a plurality on the ballast layer 13. A rail 15 is installed on the sleepers 14. A rail subsidence prevention structure 50 comprises a pipe 51 of opening the lower end by forming holes 51a in a plurality on a side surface. At least a part of the pipe 51 is buried in the ballast layer 13 in a state of turning the axial direction of the pipe 51 in the vertical direction or the oblique lower direction.SELECTED DRAWING: Figure 1 |
