沥青路面从上到下的裂缝有纵向和横向裂缝,这些裂缝起始于路面表面并向下扩展。该文通过对密歇根州多条试验路段的观测和一系列现场调查及试验室试验分析,得出离析可以增加沥青混合料对水损害的敏感性,从而促使从上到下裂缝的产生。基于病害调查数据开发了裂缝扩展模型。同时开发验证了从上到下裂缝的识别过程,为选择合适的路面改建方案提供了依据。 Asphalt pavement cracks from top to bottom have longitudinal and transverse cracks that start at the pavement surface and expand downward. Based on the observation of a number of experimental sections in Michigan and a series of field investigations and laboratory tests, the article concludes that segregation can increase the sensitivity of asphalt mixtures to water damage and promote the generation of cracks from top to bottom. A crack propagation model was developed based on disease survey data. At the same time, the identification of the crack from top to bottom was verified and verified, which provided the basis for choosing the suitable road reconstruction plan.