The model stratums mainly included miscellaneous filling soil surface, interaction stratum of silty clay, silt and fine sand and pebble round gravel at the bottom of station tunnel.
模型介质材料分别模拟地表杂填土层，粉质黏土、粉土、粉细砂互层和车站隧道底部的卵石圆砾层；
The gravel-pit was very large, with grass and wild flowers round the sides at the top.
砾石坑大极了，坑口四周长着青草和野花。
On the basis of gravel engineering quality, rolling parameter and rolling means, the compaction quality with gravel as flood prevention embankment and highway subgrade is analyzed in an all-round way.
对砂砾石料的工程性质、碾压参数和碾压方式对砂砾石料防洪堤坝兼做公路路基的压实质量的影响进行全面分析，可为此类工程实践提供参考。
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