| 摘要 |
PROBLEM TO BE SOLVED: To prevent water from permeating into concrete, and to suppress the corrosion of a joint member by making a crack intensively occur by arranging an induction bond at a cross member, and by cutting off the induction bond.SOLUTION: A ladder type sleeper 1 includes: side members 2 made of concrete respectively arranged at the lower side of a pair of rails 5 in a longitudinal direction X of the rails 5; and cross members 3 in which joint reinforcing bars 4 connecting the side members 2 in the longitudinal direction X at each predetermined interval are integrally buried in concrete 25. The cross member 3 is formed with induction bonds 31 along a cross-sectional direction across the whole circumference of the circumferential direction, and the induction bonds 31 are filled with seal materials 32 in a fluid-tight state. |
