道床砕石の粒度分布に関する模型実験的考察

概要

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In the present paper, the suitable mixed distribution of the grain size of the crushed stone ballast used in this experimentation is discussed. The 1/4 cut-down model track was constructed on the rubber road-bed which was set on the concrete bed in our structural laboratory and the mini-vibrator was placed at the center of the two sleepers set on the six kinds of the crushed stone ballast selected in the model tests severally. And the vibrating force was applied to the set of the sleepers and the number of revolution of the mini-vibrator was increased up to 1800 r. p. m.. The acceleration of the vibration induced in the track was measured by the accelerometers, and its settlement of the ballast, by the dial gauge at the ends of the sleepers after the vibration. Then we computed the coefficients ofα, β and γ that are included in the next examination equation offered by Dr. YUTAKA SATO. y=γ{1-exp(-αx)}+βx We consider in this very experimentation that it is desirable for the grain size to distribute widely in order that the resonance frequency of the track may be large.
岐阜工業高等専門学校の論文
1969-03-26