阿拉尔盐渍土路基盐-冻胀破坏机理的研究

Study on the Soil Subgrade Alar Salt Frost Heaving Damage Mechanism

新疆阿拉尔市每年冬春季节其沥青混凝土道路出现不同程度的盐-冻胀变形破坏现象。通过对虹桥路向北延伸段试验路段路面破坏最为严重的两处不同深度路基填筑层现场取土样分析,得出路基填筑层内的水泥土稳定基层因盐胀冻胀产生疏松破碎变形是导致阿拉尔市沥青混凝土道路季节性破坏的主要因素;通过对试验路段盐分、温度、路面竖向变形、地下水位及秋冬季水分变化分析,得知水稳层的破坏变形是其结构层内盐分、温度、水分共同作用的,因此对于该地区新建改建的道路要做好控温限盐防水的措施。

The asphalt concrete roads appear salt-frost heave damage phenomenon in annual winter and spring in Alar City of Xinjiang. By analyzing the site soil samples of Hongqiao Road north extension pavement test sections severely damaged roadbed filling layer two different depths,it is pointed out that the cement stabilized base loose deformation in the subgrade filling layer due to frost is the main factor for the seasonal damage of asphalt concrete roads. Through the test analysis of salinity,temperature,surface vertical deformation,groundwater level and changes in autumn and winter,it is pointed out that the failure deformation of water stable layer is the common function of salt,temperature and water in the structure layer,so the road to the new reconstruction in this area should be well controlled by temperature and salt water.