| 摘要 |
PURPOSE: A sleeper having waveform floor side is provided to minimize damage to sleeper and gravel and to improve the coherence of the gravel ballast and sleeper floor. CONSTITUTION: A sleeper having waveform floor side comprises a body portion(110), a waveform floor side(120), and a gravel ballast. The body portion has the cross section of trapezoid shape. The waveform floor side is consecutively formed on the floor side of the body portion in a longitudinal direction and traverse direction. The gravel ballast is arranged in the entire of the waveform floor side in a longitudinal direction and traverse direction.
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