哈齐客专细圆砾土冻结温度测试分析

以哈齐客运专线细圆砾土路基填料为研究对象，通过自制冻结温度试验装置测定了细圆砾土冷却与冻结过程及不同细颗粒含量下细圆砾土的冻结温度，分析了细圆砾土冻结温度随细颗粒含量的变化规律。试验结果表明：粗颗粒土的冷却与冻结过程和细粒土的类似，同样存在过冷、结晶和冻结稳定三个阶段；土样在最优含水率条件下，不同细颗粒含量的细圆砾土冻结温度随着细颗粒含量的增加而降低。

Test Analysis on Freezing Temperature of Fine Round Gravel Soil in Harbin Qiqihaer Railway

Fine round gravel soil fill obtained along Harbin Qiqihaer Railway was taken as the research object. The freezing process and the freezing temperature of filling material under different fine grain content was measured by self developed equipment. The variation law of freezing temperature of fine round gravel soil at different fine grain content were analyzed. The results show that the freezing process of coarse grained soil can be divided into three stages such as surfution, crystallization, freezing stabilization and the freezing process of coarse grained soil is similar to fine grained soil. On the other hand, soil freezing temperature decreases with the increasing of fine grain content in the condition of optimum water content.