中文摘要：

国内高等级路面以半刚性基层沥青路面结构形式为主，新疆属于温带大陆性干旱、半干旱气候，具有季节性以及昼夜温差大、干燥少雨等特点，使新疆内路面反射裂缝等病害更为突出。目前，反射裂缝已成为新疆最常见的路面病害形式之一，不仅降低路面使用性能，而且缩短了路面使用寿命，以南北疆2条国道为背景，主要从反射裂缝的产生原因及扩展机理出发，提出相应的防治措施。

英文摘要：

The asphalt pavement structure with semi rigid base is the major form of the domestic highway pavement, while the climate in Xinjiang belongs to a continental arid, semi-arid one, which is characterized with seasonal and diurnal range of temperature, dry and little rain. So the reflection crack in the ground pavement is common-seen. At present, reflection crack of the pavement has been one of the most common hazards in Xin]iang, not only reducing the pavement performance, but also shortening the service life of the road. Taking two national roads in north and south of Xinjiang as the cases, it presents the preventions based on the study of the reflection cracks and the mechanism of expansion.