汾灌高速公路沥青路面裂缝成因分析及防治

Analysis on the Cause and Prevention of Asphalt Pavement Crack on Fenguan Expressway

半刚性基层沥青路面裂缝是不可避免的,也是沥青路面早期破坏的主要形式,如果不有效地防治,将加剧了路面破坏。本文从设计、施工方面介绍了汾灌高速公路预防沥青路面裂缝的主要措施,通过路面使用情况的调查,分析了裂缝产生的主要原因为路基不均匀沉降和路基纵向不均匀,并提出了沥青路面使用期间裂缝的维修方法。

On the semi-rigid asphalt pavement, crack is inescapable, which is also the main destructive form of early asphalt pavement. Therefore, some measures should be taken to reduce crack as soon as possible while the pavement is in construction or service. We investigated the pavement state in the period of management, prevented and cured cracks effectively, and avoided the crack spreading and extended the life of the pavement. On the view point of design and construction, the authors introduced some main countermeasures against the cracks of asphalt pavement on Fenguan expressway, and the primary causes of crack, asymmetric sedimentation and vertical asymmetry of subgrade, are analyzed. Further more, some methods of maintaining asphalt pavement in the period of management are proposed in the paper.