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.
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.
用砂砾料换填细粒土地基，防治寒冷地区建筑物冻害是行之有效的方法，在国内外广泛使用。
Replacing fine grained subsoil with sandy gravel for preventing structures from frost damage is widely and effectively used in cold regions at home and abroad.
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