黑龙江省冬季时间长，且十分寒冷，冻胀造成的欢路床冻害非常严重，解决路床防冻层问题非常重要。防冻层包括道面及非冻胀性垫层，它的作用一是依靠道面及垫层抑制以下土层聚冻速度减少路床的冻胀；二是提供具有一定厚度和均匀的非冻胀垫层，使道面板和冻胀上有一定的距离，减 Heilongjiang Province, winter time is long, and very cold, frost heaving caused by Huan Road bed frost damage is very serious, to solve the problem of roadbed antifreeze is very important. Antifreeze layer, including pavement and non-frost heave cushion, its role is to rely on the pavement and cushion to suppress the following soil freezing speed to reduce the frost heaving of the roadbed; the second is to provide a certain thickness and uniform non-frost heaving Cushion, so that the road panel and frost heave on a certain distance, less