Through the investigation and analysis of the data, it is found that most of the asphalt subgrade and pavement have good stability, and there are few subsidence sections; There are many pavement cracks and rutting diseases, but it will not affect the stability of subgrade. Based on the analysis of the causes of subgrade diseases, this paper studies the prevention and maintenance measures of asphalt pavement diseases, especially cracks, ruts and pits.<BR>
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