前言路面的厚度与结构是由路面上通行的交通荷重、周围气象条仲、路床条件、施工易造价低等所决定的。特别是沥青路面的设计,在日本是以将来大型车的交通量与路床土的设计CBR法和寒冷地区的冻结深度作为主要因素。这种考虑方法在沥青路面的盖被和翻修方面也大致相同。实际上路面不光是走车,其它种种外力也会造成破坏。最显著的是寒冷地区的冰冻所引起的破坏。因冰冻 Preface The thickness and structure of the pavement are determined by the traffic load prevailing on the pavement, the weather conditions around the road, the condition of the roadbed and the low construction cost. In particular, the design of asphalt pavement is mainly based on the CBR method of traffic volume and roadbed soil design in the future and the frozen depth in cold regions in Japan. This method of consideration is also roughly the same in terms of roofing and overhauling asphalt pavements. In fact, the road is not just a car, and other kinds of external forces can also cause damage. The most notable is the damage caused by freezing in cold regions. Because of freezing