寒区软岩隧道的水热耦合数值模拟与分析

介绍了寒区软岩隧道水热耦合的一般数值解法，应用Femlab软件对寒区大阪山隧道出口段kl06+025处围岩的温度场和水分场进行数值模拟，分析了软岩隧道中水热耦合迁移的规律。在考虑水分场时，隧道围岩的冻结圈将变薄，而且随着水分场中渗流系数的增大将更加变薄，水分场在很大程度上影响温度场的分布。模拟的结果表明：处于拱顶处的冻深最大，其次是仰拱处，最薄处是边墙，与工程经验类似。通过实例模拟分析说明，应用该软件可以在已有工程数据的前提下对工程设计提供一定的参考。

Numerical simulation and analysis of moisture-heat coupling for soft rock tunnel in cold regions

The common numerical solution method of the moisture and heat coupling for the soft rock in cold region tunnels is introduced. The temperature field and moisture field in the surrounding rock of Dabanshan tunnel at its exit kl06+025 in the cold region is numerically simulated by software Femlab; the law of moisture-heat coupling transfer in the soft rock tunnel is analyzed. The frozen circle will be thinner when taking into account the moisture field and be much thinner if the seepage coefficient be increased. The moisture field influences the redistributing of temperature field greatly. The simulating result shows that the frozen depth of vault is the deepest; the below of vault’s is deeper and the side wall rock’s is the thinnest and the result is similar to the engineering experience. The software Femlab is proved to be applied to provide some reference for the engineering design if the necessary data is collected through the simulating example.