苏联北高加索等地主要用冷沥青混凝土混合料铺筑高级路面。高强路基是保证这种路面稳定性和平整性的必要条件之一。在公路改建和大修工程中,原有旧路面通常都作为回填料使用。在这种情况下,不需加高路基和路面补强的路段,填料是为了找平,可铺筑5—8厘米厚的碎石找平层。大家知道,原有路面在使用过程中进一步受到行车的压实,真到完全稳定。碎石找平层实际上相当于基层,在行车作用下重新 The Soviet Union North Caucasus and other places mainly paving high-grade pavement with cold asphalt concrete mixture. High-strength subgrade is one of the necessary conditions to ensure the stability and smoothness of such pavement. In the road reconstruction and overhaul works, the original old pavement is usually used as a backfill. In this case, there is no need to increase the roadbed and pavement reinforcement. The packing is for leveling and can be paved with gravel 5-8 cm thick. As we all know, the original pavement is further compacted by traffic while it is in use, so it is completely stable. Gravel leveling is actually equivalent to the grass-roots level, in the role of traffic back