得到砂砾石含量对混合料的最佳含水量及最大干密度的影响特征，及其不掺土的砂砾石料的击实特性。

Effects on optimum water content and maximum dry density of grit-clay mixture by grit content, as well as compaction characteristics are obtained.

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研究表明，在连续级配碎石、砂砾、石灰稳定土、石屑几种回填材料中以自然级配砂砾石为最佳台背回填材料。

According to the research, the natural graded gravel is the best backfill material of graded crushed stone, grit, lime stabilized soil and rock chips.

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研究结果表明，考虑地基土、砂砾石垫层、上部结构共同作用时，结构的基本频率明显减小，相应的基本周期明显延长；

The results shows that the fundamental frequency of the model which takes the combined activate into consideration reduced evidently, and the fundamental period prolonged evidently.

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研究结果表明，考虑地基土、砂砾石垫层、上部结构共同作用时，结构的基本频率明显减小，相应的基本周期明显延长；

The results shows that the fundamental frequency of the model which takes the combined activate into consideration reduced evidently, and the fundamental period prolonged evidently.

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