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不同的区域由于气候、轴载等的特点不同,沥青混凝土路面产生病害的种类原因也会差别很大。通过对陕西省已通车14条高速公路沥青混凝土路面病害、气候、轴载的实地调查,系统分析归纳得出:(1)陕北地区高速公路沥青混凝土路面典型病害为横向裂缝和车辙,陕南地区为坑槽和车辙;(2)通过分析得出车辙病害产生的主要原因为陕西省夏季普遍高温、长大纵坡多、超载现象普遍,陕北地区横向裂缝产生原因为陕北低温和昼夜温差大,陕南地区横向裂缝产生原因为夏季骤降暴雨导致路面温度骤降,陕南地区坑槽主要由陕南多雨引起的表面型坑槽,陕北地区坑槽主要为施工原因引起的桥面型坑槽;(3)陕南地区高速公路沥青混凝土路面设计优先保证面层的高温性能和水稳定性能,陕北地区优先保证低温性能。
Different regions due to the different characteristics of the climate, axle load, etc., asphalt concrete pavement cause of disease causes vary widely. Through the field investigation and systematic analysis of asphalt pavement diseases, climate and axle load of 14 expressways in Shaanxi Province, the author concluded that: (1) The typical diseases of asphalt concrete pavement in northern Shaanxi are transverse cracks and rutting; (2) Through analysis, the main causes of rutting disease were the general high temperature in summer in Shaanxi Province, the long vertical and horizontal growth, the overloading phenomenon was common, and the reason of transverse cracks in northern Shaanxi was the low temperature and the night and day The temperature difference is large. The reason for the lateral cracks in southern Shaanxi is that the sudden drop in temperature caused by the heavy rainfall in summer led to the surface pit in southern Shaanxi being mainly caused by the rainy area in southern Shaanxi. The pit in northern Shaanxi was mainly caused by construction reasons Surface pit; (3) Asphalt concrete pavement design of expressway in southern Shaanxi gives priority to ensure the high-temperature performance and water stability of the surface layer, and the low-temperature performance is preferentially guaranteed in northern Shaanxi.