中文摘要：

为了更全面的了解冻融循环和冻胀力作用对隧道的结构影响, 以内蒙古寒区公路隧道的304国道阿拉坦公路隧道为依托, 采用弹性力学方法计算阿拉坦隧道承受的冻胀力.采用大型有限元模拟软件ANSYS对隧道断面进行温度场-应力场的耦合分析, 计算了工程50 a冻融循环后隧道断面的冻胀力, 并对比分析了弹性力学方法和现场测试结果.结果表明： 理论及数值模拟计算的结果之间能够较为近似的相互印证, 可以通过对隧道冻胀力的理论及数值模拟计算结果的比对, 及时了解隧道运营期间结构受力性状的变化情况, 来判断隧道结构的安全度和可靠度.

英文摘要：

For understanding comprehensively the influences of freeze-thaw cycle and frost heaving force on the structures of tunnel in the cold regions, taking the highway tunnel in cold region in Inner Mongolia （Alatan Highway Tunnel） as an example, the frost heaving forces were calculated by the method of elasticity mechanics in this paper. The thermal-stress field coupling analysis on the tunnel section was done with the finite element simulation software-ANSYS. The frost heaving pressures on the tunnel section after freeze-thaw cycles of 50 years are worked out. The results with the elastic mechanics method and on-situ test are compared and analyzed. It is found that the theoretical and the numerical simulated results are relatively similar. The change in loading condition on the structures during the tunnel operation can be understood by comparing the theoretical and numerical simulated results of frost heaving pressures on the tunnel. Thus the degree of safety and reliability of the tunnel structures can be determined.