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大坝垫层料采用以天然砂砾料为主、掺入小石和粗砂以调整级配的方式生产。
The cushion layer for the dam is constructed with the material prepared mainly with natural sandy gravel and mixed with proper amount of pebble and coarse sand.
结合工程实例，详细介绍天然砂砾在高等级公路工程中路基压实度的检测方法。
Combining with project practice, this paper introduces checking method of grit road foundation solidness in super road project.
天然砂砾料是山区河道中丰富的自然资源，也是压实后稳定性良好的路基填筑材料。
Natural gravel is rich natural resources and also better stable compacting roadbed material in the river courses of mountain areas.
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